CN104755247A - Lens sheet manufacturing method - Google Patents
Lens sheet manufacturing method Download PDFInfo
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- CN104755247A CN104755247A CN201380057299.8A CN201380057299A CN104755247A CN 104755247 A CN104755247 A CN 104755247A CN 201380057299 A CN201380057299 A CN 201380057299A CN 104755247 A CN104755247 A CN 104755247A
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- Prior art keywords
- lens
- thermoplastic resin
- layer
- ridge shape
- extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/911—Cooling
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/918—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling
- B29C48/9185—Thermal treatment of the stream of extruded material, e.g. cooling characterized by differential heating or cooling in the direction of the stream of the material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
Abstract
Provided is an extrusion molding manufacturing method for a lens sheet having a resin sheet that is thick and a ridge-shaped lens the aspect ratio of which is high. The extrusion manufacturing method for a lens sheet includes the following: a first step in which a thermoplastic resin (A) and a thermoplastic resin (B) the MFR (according to ISO 1133, a value measured under conditions where the temperature is 230 DEG C and the load is 37.3N) of which is smaller than the thermoplastic resin (A) are formed by extrusion molding, and a molten multi-layer sheet, provided with a first layer that is a surface layer and that comprises the thermoplastic resin (A) and the volume per unit length of which is y (y is a positive number), and an adjacent second layer that comprises the thermoplastic resin (B), is obtained using a mutli-manifold die; and a second step in which n (n is a natural number) ridge-shaped lenses are formed by closely adhering, to a surface formed by the first layer of the molten multi-layer sheets obtained in the first step, a forming die having a plurality of grooves in which the capacity per unit length is x (x is a positive number) which satisfies formula (1) 0.7<=y/nx<=2.0 (1).
Description
Technical field
The present invention relates to the manufacture method of the lens possessing multiple ridges shape lens arranged in parallel on the surface of resin sheet, specifically, the present invention relates to and be particularly suitable for manufacturing the thick and method of the lens that aspect ratio that is ridge shape lens is high of the thickness of resin sheet.
Background technology
The known lens possessing multiple ridges shape lens arranged in parallel on the surface of resin sheet.As the shape of these ridge shape lens, the lens of such as half-conical shape can be enumerated, prism (referenced patent document 1 ~ 4) that drift angle is the triangular prism shape of 90 degree.For this lens, usually require the aspect ratio (i.e. (height of ridge shape lens)/(spacing of ridge shape lens)) increasing ridge shape lens.
As the manufacture method of above-mentioned lens, can enumerate and thermoplastic resin is carried out to the method for extrusion molding or injection moulding, ultraviolet curable resin carried out to the method for optical soliton interaction.Wherein, the method for thermoplastic resin being carried out to extrusion molding is excellent from the viewpoint of continuous seepage rate.
Be manufactured on as the extrusion molding by thermoplastic resin the method that two sides has the lens of ridge shape lens, the mode of the known thermoplastic resin high with the thermoplastic resin clamping viscosity low by viscosity configures and carries out the method for multilayer extrusion shaping.In the method, by manufacturing lens, can suppress at the resin sagging manufacturing molten sheet when having the lens of the high ridge shape lens of aspect ratio, production stability increases (referenced patent document 5).
In addition, known be used in be configured with hot buffer component between core body and pattern elements pattern roller as figuration mould by the shape transfer of pattern elements to the method on the sheet of the molten condition of extrusion molding, and disclose be arranged with the Production Example (referenced patent document 6) that aspect ratio is the lens of the prism of 0.5 on the resin sheet of thickness 1mm.
As one of the purposes of said lens sheet, there is the light guide plate used in liquid crystal indicator etc.In this purposes, along with the maximization development of device in recent years, in order to ensure the intensity of light guide plate, require resin sheet is thickened.
Research according to the present inventor shows, in the method that patent document 5 is recorded, when making resin sheet thicken, figuration rate (i.e. the degree of depth of the groove of the height/figuration mould of the ridge shape lens of lens) reduces, the aspect ratio of ridge shape lens has the tendency of reduction, the leeway be still improved.
In addition, in the method that patent document 6 is recorded, utilize hot buffer component that heat is delivered to resin sheet effectively, therefore, when the thickness of resin sheet is thick, cooling, the solidification of the relief pattern of formation cannot be carried out, fast after peeling off from pattern roller, ridge shape lens have the tendency of distortion, thus become problem.
Prior art document
Patent document
Patent document 1: Japanese Unexamined Patent Publication 2-190835 publication
Patent document 2: Japanese Unexamined Patent Publication 2009-37803 publication
Patent document 3: Japanese Unexamined Patent Publication 2009-265380 publication
Patent document 4: Japanese Unexamined Patent Publication 2009-283383 publication
Patent document 5: Japanese Unexamined Patent Publication 4-299329 publication
Patent document 6: Japanese Unexamined Patent Publication 2003-53834 publication
Summary of the invention
Invent problem to be solved
The object of the invention is to use thermoplastic resin to be manufactured by extrusion molding in the method for lens to provide can industrially easily manufacture be suitable for large-scale light guide plate etc., the thickness aspect ratio that is thick, ridge shape lens of resin sheet is high and in the method extruding uniform lens on width.
For the method for dealing with problems
According to the present invention, above-mentioned object can be solved by the invention comprising following manner.
[1] extrusion manufacture method for lens, it comprises:
First operation, extrusion molding is carried out to thermoplastic resin (A) and MFR (according to ISO1133 230 DEG C, the value that measures under the condition of the load 37.3N) thermoplastic resin (B) less than above-mentioned thermoplastic resin (A), utilize multimanifold die obtain possessing in adjacent mode be made up of thermoplastic resin (A), the volume of per unit length is y (y is for positive number) and as the ground floor on top layer and the multilayer tablet of the molten condition of the second layer that is made up of thermoplastic resin (B); And
Second operation, the volume making to have multiple per unit length for the surface be made up of ground floor of the multilayer tablet meeting the molten condition obtained in the figuration mould of the groove of the x (x is positive number) of following formula (1) and the first operation closely sealed, form n (n is natural number) ridge shape lens
0.7≤y/nx≤2.0 (1)。
The extrusion manufacture method of the lens [2] as described in [1], is characterized in that, above-mentioned y, n, x meet following formula (2),
1.05≤y/nx≤1.4 (2)。
Invention effect
According to the present invention, can industrially easily manufacture be suitable for large-scale light guide plate etc., the thick and lens that aspect ratio that is ridge shape lens is high, the such as resin sheet thickness of the thickness of resin sheet is 2.5 ~ 15mm, the aspect ratio of ridge shape lens is the lens of 0.3 ~ 1.0.
Accompanying drawing explanation
Fig. 1 is the figuration rate of central portion of the ridge shape lens representing embodiment 1 ~ 5 and comparative example 3,4 and the figure of the relation of y/nx.
Fig. 2 is the skeleton diagram of the extrusion shaper of the lens manufacturing embodiment and comparative example.
Detailed description of the invention
[thermoplastic resin]
The MFR of the thermoplastic resin (B) used in manufacture method of the present invention is less than the MFR of thermoplastic resin (A).That is, when the MFR of thermoplastic resin (A) being set to MFR (A), the MFR of thermoplastic resin (B) being set to MFR (B), the value of MFR (A)/MFR (B) is greater than 1.The value of MFR (A)/MFR (B) is preferably the scope of 1.5 ~ 40, is more preferably the scope of 2 ~ 30, more preferably the scope of 3 ~ 20.By making the value of MFR (A)/MFR (B) be greater than 1, the aspect ratio of ridge shape lens can be improved.From the view point of the uniformity improving the thickness of lens obtained, the value of preferred MFR (A)/MFR (B) is less than 40.It should be noted that, in this description, MFR refers to according to ISO1133 230 DEG C, the value that measures of the condition of load 37.3N.
From the view point of being as far as possible seamlessly filled in the groove of figuration mould by thermoplastic resin (A), MFR (A) is preferably the scope higher than the thermoplastic resin used in extrusion molding in the past.Such as, be preferably the scope of 7 ~ 50g/10 minute, be more preferably the scope of 7 ~ 30g/10 minute, more preferably the scope of 10 ~ 25g/10 minute, be particularly preferably the scope of 10 ~ 20g/10 minute.When MFR (A) is less than 7g/10 minute, the figuration rate of the lens obtained reduces sometimes, and when being greater than 50g/10 minute, the extrusion capacity of the thermoplastic resin (A) during extrusion molding becomes unstable sometimes.
It should be noted that, in this description, by two numerical value with the record that " ~ " connects represent these two numerical value and between scope.
From the view point of the run stability of extrusion molding, MFR (B) is preferably the scope of 0.2 ~ 5g/10 minute, is more preferably the scope of 0.4 ~ 4g/10 minute, more preferably the scope of 0.5 ~ 3g/10 minute.When MFR (B) is less than 0.2g/10 minute, the hypertonia of the molten resin in extrusion shaper, there is breakage in extrusion shaper, when being greater than 5g/10 minute, the uneven thickness of the lens obtained increases sometimes sometimes.
[the first operation]
In first operation, extrusion molding is carried out to thermoplastic resin (A) and thermoplastic resin (B), obtains possessing in adjacent mode being made up of thermoplastic resin (A) and as the ground floor on top layer and the multilayer tablet of the molten condition of the second layer that is made up of thermoplastic resin (B).
Thermoplastic resin (A) is not particularly limited with the condition of the extrusion molding of thermoplastic resin (B).Usually, by thermoplastic resin (A) and thermoplastic resin (B) melting in the barrel of extrusion shaper respectively, extrusion molding after extrusion die inner stacks, obtains the multilayer tablet of molten condition.From making the uniform viewpoint of the thickness of each layer, extrusion die is used in the multimanifold die that inside has multiple manifold.
When utilizing the multimanifold die that uses in the application to manufacture multilayer tablet, the thermoplastic resin forming each layer is supplied to each stream of die internal, the resin forming each layer, respectively to after the width expansion of plate, collaborates and extrudes near the outlet of die head.Therefore, in multimanifold die, even if the mobility of resin is different, the thickness of each layer also can be made even on the width of plate.
In extrusion molding, make the temperature (forming temperature) of thermoplastic resin (A) and thermoplastic resin (B) the melting such as preferred load strain temperature than thermoplastic resin (A) and thermoplastic resin (B) usually high 130 ~ 180 DEG C separately.Thermoplastic resin (A) can be different from the forming temperature of thermoplastic resin (B).In the formation of the ridge shape lens in the second operation, improve figuration rate from the view point of the mobility improving thermoplastic resin (A), preferably make the forming temperature of forming temperature higher than thermoplastic resin (B) of thermoplastic resin (A).
Multimanifold die has the heater for heating each thermoplastic resin usually.The heater that multimanifold die has can be different according to each thermoplastic resin, in this case, can change the temperature (forming temperature) of the heater of each thermoplastic resin respectively.The temperature forming the heater that the thermoplastic resin (A) of ground floor contacts is the temperature of heater that contacts of preferred that have higher than multimanifold die with the temperature difference of 5 ~ 40 DEG C, thermoplastic resin (B) usually, the temperature of that more preferably have higher than multimanifold die with the temperature difference of 10 ~ 35 DEG C, that thermoplastic resin (B) contacts heater, the further temperature of heater that contacts of preferred that have higher than multimanifold die with the temperature difference of 15 ~ 30 DEG C, thermoplastic resin (B).By making this temperature difference be less than 40 DEG C, the lens obtained not easily produces warpage.
The extrusion capacity of thermoplastic resin (A) is not particularly limited, and such as, can be set as 5 ~ 100kg/ hour.
The extrusion capacity of thermoplastic resin (B) is not particularly limited, and such as, can be set as 50 ~ 400kg/ hour.
The ratio of the extrusion capacity of thermoplastic resin (A) and thermoplastic resin (B) is as being set as 1:2 ~ 1:50 etc.
The extruded velocity of the multilayer tablet of molten condition is not particularly limited, and such as, can be set as 0.1 ~ 10m/ minute.
According to the thickness of the multilayer tablet of the extrusion capacity of used each thermoplastic resin and the molten condition that the width etc. of the outlet of multimanifold die can be utilized to regulate, the volume y of the per unit length of ground floor can be regulated.
In extrusion molding, in one or both in above-mentioned thermoplastic resin (A) and thermoplastic resin (B), can add as required antioxidant, heat deterioration preventing agent, ultra-violet absorber, Photostabilised dose, lubricant, releasing agent, antistatic agent, polymer processing aid, fire retardant, dyestuff and pigment, light diffusing agent, resistance to impact modifying agent, fluorophor etc.
The thickness of the multilayer tablet of the molten condition obtained in this operation is preferably the scope of 2 ~ 20mm usually, is more preferably the scope of 2.5 ~ 10mm.When thickness is thinner than 2mm, the intensity of resin sheet is sometimes not enough, and when being thicker than 20mm, cooling, the solidification of the relief pattern of formation cannot be carried out rapidly, and after peeling off from figuration mould, ridge shape lens have the tendency of distortion.
The ratio of the ground floor of the multilayer tablet of the molten condition obtained in this operation and the thickness of the second layer is as being set as 1:2 ~ 1:50 etc.
In this description, the volume of the per unit length of ground floor is defined as y.In addition, ground floor is the top layer of the multilayer tablet of molten condition, in the second operation, closely sealed with figuration mould.As a result, ground floor becomes n ridge shape lens being formed in the second operation at least partially.
The second layer can be the top layer of the multilayer tablet of molten condition, also can be covered by other layers.That is, the multilayer tablet of molten condition can comprise other layers beyond ground floor, the second layer.Other layers described can be made up of thermoplastic resin (A) or thermoplastic resin (B), also can be made up of other thermoplastic resins.From the view point of the warpage suppressing the lens obtained, preferably use the multilayer tablet of three layers that the third layer be made up of thermoplastic resin (A) obtains as other layers and with the ground floor/second layer/being arranged in order of third layer.When manufacturing the multilayer tablet of this three layers, now, preferably the extrusion capacity of third layer is set as the scope of 0.9 ~ 1.1 times of the extrusion capacity of ground floor, more preferably equal with the extrusion capacity of ground floor.
[the second operation]
In second operation, the volume making to have multiple per unit length for the surface be made up of ground floor of the multilayer tablet meeting the molten condition obtained in the figuration mould of the groove of the x of formula (1) and the first operation closely sealed, form n ridge shape lens.Now, preferably make other surfaces of the multilayer tablet of extrusion die and molten condition closely sealed.
The shape of figuration mould and extrusion die can enumerate such as band shape, roll etc.
When forming n ridge shape lens, the volume of the per unit length of the groove of required figuration mould add up to nx.From the view point of realizing high figuration rate, the value of the y/nx in formula (1) is the scope of 0.7 ~ 2.0, is preferably the scope of 1.05 ~ 1.4, is more preferably the scope of 1.2 ~ 1.3.
The number n of the ridge shape lens of lens of the present invention determines with (width of the lens of manufacture)/(spacing of ridge shape lens).According to the volume x of the per unit length of the volume y of per unit length of the ground floor of the multilayer tablet of the molten condition determined in the number n of described ridge shape lens, above-mentioned first operation and the groove of figuration mould, the value of y/nx can be adjusted to the scope of expectation.Specifically, when manufacturing the multilayer tablet of molten condition in above-mentioned first operation, be set to r in the total of the extrusion capacity of the time per unit by used whole thermoplastic resins, the extrusion capacity of the time per unit of thermoplastic resin (A) is set to r
1time, by regulation rates r
1/ r, can regulate the value of y/nx, along with r
1/ r increases, and y/nx increases.
According to the value of y/nx, can determine to be filled to which kind of degree in the volume of ground floor in the groove of figuration mould.That is, when the value of y/nx is greater than 1, be only full of by thermoplastic resin (A) in this groove, in the lens obtained, ground floor can form a part for ridge shape lens and resin sheet, and the second layer can form resin sheet.On the other hand, when the value of y/nx is less than 1, be full of by the thermoplastic resin (A) of whole amount and a part of thermoplastic resin (B) in groove, in the lens obtained, ground floor can form a part for ridge shape lens, and the second layer can form a part and the resin sheet of ridge shape lens.When the value of y/nx is 1, be only full of by thermoplastic resin (A) in this groove, in the lens obtained, ground floor only can form ridge shape lens, and the second layer only can form resin sheet.As discussed above, manufacture method of the present invention is by carrying out adjustment to achieve the goal to forming the ratio formed by ground floor in the ratio of ridge shape lens and ridge shape lens in ground floor.
From the view point of being as far as possible seamlessly filled in figuration mould by thermoplastic resin (A), the temperature of figuration mould is preferably the scope of load strain temperature ± 10 DEG C of thermoplastic resin (A).During the temperature of figuration mould temperature more than 10 DEG C lower than the load strain temperature of thermoplastic resin (A), resin becomes insufficient to the filling in figuration mould, in addition, during the temperature of figuration mould temperature more than 10 DEG C higher than the load strain temperature of thermoplastic resin (A), resin cannot successfully carry out from the demoulding of figuration mould, resin sheet occurs and is wound on the blemish that fault such on roller or generation be called as release mark.
Fully cool from the view point of to thermoplastic resin (B), the temperature of extrusion die is preferably the scope of (the load strain temperature-20 DEG C of thermoplastic resin (B)) ~ (the load strain temperature of thermoplastic resin (B)).
It should be noted that, the load strain temperature of thermoplastic resin (A) and thermoplastic resin (B) can measure according to ISO75-2.
From the view point of the aspect ratio improving the ridge shape lens of lens obtained, the spacing of the figuration mould used is preferably the scope of 0.05 ~ 1.0mm usually, is more preferably the scope of 0.1 ~ 0.8mm.
In the present invention, the sheet formed products obtained in the second operation being cut along the direction vertical with extruding direction usually, regulating length, making lens.In addition, can suitably carry out cutting to the two ends of extruding width parallel with extruding direction and carry out adjustment width.
Embodiment
Below, illustrate that embodiment and comparative example are described in detail to the present invention, but the invention is not restricted to these embodiments.
The figuration mould used is as described below.
Use the surface configuration of biliquid curing type silicone resin transfer figuration mould, utilize microscope to observe its cross sectional shape, measure spacing and the degree of depth of groove.As a result, the cross sectional shape of the groove of figuration mould roller is spacing is 0.4mm, the degree of depth is the half elliptic of 0.231mm.
In addition, calculated the area of the groove of half-oval shaped by the spacing of obtained groove and the degree of depth, and then calculate the volume x (m of per unit length
3/ m).As a result, x is 0.14 × 10
-6m
3/ m.
The lens obtained is evaluated by following method.
(1) height of ridge shape lens
Utilize with the extrude direction vertical cross section of microscope to lens to observe, measure the distance parallel with thickness direction from the top of ridge shape lens to valley.Using the distance that measures at the central portion extruding width as the height of the ridge shape lens of central portion, using at the height of distance as the ridge shape lens of end departing from the Site Determination of 600mm from the central portion extruding width to the end of extruding width of side.
(2) thickness of resin sheet
Utilize with the extrude direction vertical cross section of microscope to lens to observe, measure the distance from the valley of ridge shape lens to the surface of third layer.
(3) calculating of y/nx
By extrusion capacity Q (kg/ hour), the extruded velocity v (m/ minute) of lens, the proportion ρ (g/cm of thermoplastic resin (A) of thermoplastic resin (A)
3) the volume y (m of the per unit length of ground floor is calculated by following formula
3/ m).
y＝Q/(60000×ρ×v)(m
3/m)
By the y calculated and the quantity n of ridge shape lens formed and the above-mentioned x (m calculated
3/ m) calculate y/nx.
(4) spacing of ridge shape lens
Utilize with the extrude direction vertical cross section of microscope to lens to observe, measure the distance at top to the top of adjacent ridge shape lens from ridge shape lens.
(5) aspect ratio of ridge shape lens
With the height of the ridge shape lens of the central portion measured in above-mentioned (1) divided by the spacing of the ridge shape lens measured in above-mentioned (4), obtain aspect ratio.
(6) figuration rate (%)
Obtain the percentage of height relative to the degree of depth of the groove of figuration mould of the ridge shape lens of central portion and the end measured in above-mentioned (1), as the figuration rate (%) of central portion and end.
(7) thickness of third layer
Utilize with the extrude direction vertical cross section of microscope to sheet to observe, and measure.Using the thickness that measures at the central portion extruding width as the thickness of the third layer of central portion, using at the thickness of thickness as the third layer of end departing from the Site Determination of 600mm from the central portion extruding width to the end of extruding width of side.
Fig. 2 is the skeleton diagram of the extrusion shaper 1 used in embodiment and comparative example.Extrusion shaper 1 is made up of not shown extrusion screw rod portion, the T-shaped multimanifold die 2 of multilayer extrusion, extrusion die roller 31, figuration mould roller 32, chill roll 33,34.The surface of figuration mould roller 32 is provided with the groove that 3250 peripheries along roller extend.
The surface smoothing of extrusion die roller 31, chill roll 33,34.The resin of the with shape of melting is discharged downwards from the molten resin discharge portion of the T-shaped multimanifold die 2 of multilayer extrusion.Extrusion die roller 31 and figuration mould roller 32 be relative and horizontal arrangement in parallel to each other in the mode clipping molten resin.Chill roll 33,34 is positioned at conplane mode with the rotating shaft parallel and respective with figuration mould roller 32 with extrusion die roller 31 and configures.
In embodiment and comparative example, use following acrylic resin (a) and acrylic resin (b).
Acrylic resin (a): Kuraray Co., Ltd. manufactures, " パ ラ ペ ッ ト GH ", MFR=10 (according to ISO1133 at 230 DEG C, the Directory Value that measures under the condition of load 37.3N), load strain temperature=95 DEG C (having the Directory Value measured under the condition of annealing, load 1.82MPa according to ISO75-2), proportion 1.19.
Acrylic resin (b): Kuraray Co., Ltd. manufactures, " パ ラ ペ ッ ト EH ", MFR=1.3g/10 minute (according to ISO1133 at 230 DEG C, the Directory Value that measures under the condition of load 37.3N), load strain temperature=93 DEG C (condition determination: having the Directory Value measured under the condition of annealing, load 1.82MPa according to ISO75-2), proportion 1.19.
Embodiment 1
Acrylic resin (a) and acrylic resin (b) is dropped in extrusion shaper, acrylic resin (a) is heated to 260 DEG C, acrylic resin (b) is heated to 245 DEG C, in the T-shaped multimanifold die of multilayer extrusion that the length extruding width discharging molten resin quilt is about 1500mm, with acrylic resin (a), acrylic resin (b), the order of acrylic resin (a) is carried out stacked, extrude acrylic resin (a) for ground floor, acrylic resin (b) is the second layer, the multilayer tablet of the molten condition that acrylic resin (a) is third layer.The extrusion capacity of acrylic resin (a) (ground floor and third layer) is set as 20kg/ hour respectively, and the extrusion capacity of acrylic resin (b) (second layer) is set as 200kg/ hour.
Then, the multilayer tablet of this molten condition is supplied to configure in parallel to each other in the mode of interval 3mm give lens shape between extrusion die roller 31 and figuration mould roller 32, then make itself and chill roll 33,34 closely sealed, be arranged with the sheet formed products of multiple ridges shape lens from the teeth outwards.The width of sheet formed products is about 1.4 (m).
The surface temperature of extrusion die roller 31 is 80 DEG C, and the surface temperature of figuration mould roller 32 is 100 DEG C, and the surface temperature of chill roll 33 is 100 DEG C, and the surface temperature of chill roll 34 is 70 DEG C, and the extruded velocity of lens is 0.8m/ minute.
The value of y/nx is 0.750.
By obtained sheet formed products with extrude direction and vertically cut with the length of 1.3m.In addition, by the width of each for the two ends of extruding width parallel with extruding direction Self cleavage equalization, making width be 1.3m, making lens.
The spacing 0.4mm of the ridge shape lens of the lens obtained in the above described manner, the thickness of resin sheet is 2.8mm, and the height of the ridge shape lens of central portion is 0.16mm, and the height of the ridge shape lens of end is 0.159mm, the aspect ratio of ridge shape lens is 0.400, and the figuration rate of central portion and end is 69%.The thickness of the third layer of central portion is 0.136mm, and the thickness of the third layer of end is 0.135mm.
Embodiment 2
Except the extrusion capacity of acrylic resin (a) (ground floor and third layer) is set as respectively 28.8kg/ hour, the extrusion capacity of acrylic resin (b) (second layer) is set as, except 182.3kg/ hour, manufacturing lens similarly to Example 1.As a result, y/nx is 1.081.The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, the thickness of resin sheet is 2.8mm, the height of the ridge shape lens of central portion is 0.164mm, the height of the ridge shape lens of end is 0.162mm, the aspect ratio of ridge shape lens is 0.410, the figuration rate of central portion is 71%, and the figuration rate of end is 70%.The thickness of the third layer of central portion is 0.196mm, and the thickness of the third layer of end is 0.194mm.
Embodiment 3
Except the extrusion capacity of acrylic resin (a) (ground floor and third layer) is set as respectively 32kg/ hour, the extrusion capacity of acrylic resin (b) (second layer) is set as, except 176kg/ hour, manufacturing lens similarly to Example 1.As a result, y/nx is 1.230.The spacing 0.4mm of the ridge shape lens of the lens obtained in the above described manner, the thickness of resin sheet is 2.8mm, and the height of the ridge shape lens of central portion and end is 0.177mm, and the aspect ratio of ridge shape lens is 0.443, and the figuration rate of central portion and end is 77%.The thickness of the third layer of central portion is 0.223mm, and the thickness of the third layer of end is 0.222mm.
Embodiment 4
Except the extrusion capacity of acrylic resin (a) (ground floor and third layer) is set as respectively 36.8kg/ hour, the extrusion capacity of acrylic resin (b) (second layer) is set as, except 164.4kg/ hour, manufacturing lens similarly to Example 1.As a result, y/nx is 1.379.The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, the thickness of resin sheet is 2.8mm, the height of the ridge shape lens of central portion is 0.164mm, the height of the ridge shape lens of end is 0.166mm, the aspect ratio of ridge shape lens is 0.410, the figuration rate of central portion is 71%, and the figuration rate of end is 72%.The thickness of the third layer of central portion and end is 0.25mm.
Embodiment 5
Except the extrusion capacity of acrylic resin (a) (ground floor and third layer) is set as respectively 51.5kg/ hour, the extrusion capacity of acrylic resin (b) (second layer) is set as, except 137kg/ hour, manufacturing lens similarly to Example 1.As a result, y/nx is 1.930.The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, the thickness of resin sheet is 2.8mm, the height of the ridge shape lens of central portion is 0.156mm, the height of the ridge shape lens of end is 0.157mm, the aspect ratio of ridge shape lens is 0.390, and the figuration rate of central portion and end is 68%.The thickness of the third layer of central portion is 0.35mm, and the thickness of the third layer of end is 0.348mm.
Comparative example 1
In extrusion shaper, drop into acrylic resin (b), be heated to 245 DEG C, extrude the sheet of molten condition with the extrusion capacity of 240kg/ hour from T-shaped multimanifold die.Then, the sheet of this molten condition is supplied to configure in parallel to each other in the mode of interval 3mm give lens shape between extrusion die roller 31 and figuration mould roller 32, then make itself and chill roll 33,34 closely sealed, be manufactured on the lens being arranged with multiple ridges shape lens on the surface.The surface temperature of extrusion die roller 31 is 80 DEG C, and the surface temperature of figuration mould roller 32 is 100 DEG C, and the surface temperature of chill roll 33 is 100 DEG C, and the surface temperature of chill roll 34 is 70 DEG C, and the extruded velocity of lens is 0.8m/ minute.
The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, and the thickness of resin sheet is 2.9mm, and the height of the ridge shape lens of central portion and end is 0.100mm, and the aspect ratio of ridge shape lens is 0.250, and the figuration rate of central portion and end is 43%.
Comparative example 2
Except the extrusion capacity of acrylic resin (b) is set as 160kg/ hour, by except being configured in parallel to each other in the mode of interval 2mm between extrusion die roller 31 and figuration mould roller 32, manufacture lens 4 in the same manner as comparative example 1.
The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, and the thickness of resin sheet is 1.9mm, and the height of the ridge shape lens of central portion and end is 0.150mm, and the aspect ratio of ridge shape lens is 0.375, and the figuration rate of central portion and end is 65%.
Comparative example 3
Except the extrusion capacity of acrylic resin (a) (ground floor and third layer) is set as respectively 5.9kg/ hour, the extrusion capacity of acrylic resin (b) (second layer) is set as except 228.2kg/ hour, manufacture lens in the same manner as embodiment 1 と.As a result, y/nx is 0.221.The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, the thickness of resin sheet is 2.9mm, the height of the ridge shape lens of central portion is 0.115mm, the height of the ridge shape lens of end is 0.113mm, the aspect ratio of ridge shape lens is 0.288, the figuration rate of central portion is 50%, and the figuration rate of end is 49%.The thickness of the third layer of central portion and end is 0.040mm.
Comparative example 4
Except the extrusion capacity of acrylic resin (a) (ground floor and third layer) is set as respectively 88.2kg/ hour, the extrusion capacity of acrylic resin (b) (second layer) is set as, except 63.5kg/ hour, manufacturing lens similarly to Example 1.As a result, y/nx is 3.309.The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, and the thickness of resin sheet is 2.9mm, and the height of the ridge shape lens of central portion and end is 0.112mm, and the aspect ratio of ridge shape lens is 0.280, and the figuration rate of central portion and end is 48%.The thickness of the third layer of central portion is 0.600mm, and the thickness of the third layer of end is 0.597mm.
Comparative example 5
Replace acrylic resin (b) except using acrylic resin (a) and except being heated to 260 DEG C extrude, manufacture lens in the same manner as comparative example 1.The sheet of the molten condition extruded from T-shaped multimanifold die ruptures continually, cannot carry out stable manufacture.In addition, the lens obtained, the shape of ridge shape lens is uneven, is not to stand practical lens.
Comparative example 6
Except being changed into except the T-shaped feed block die head of multilayer extrusion by T-shaped for multilayer extrusion multimanifold die, manufacture lens similarly to Example 3.As a result, y/nx is 1.230.The spacing of the ridge shape lens of the lens obtained in the above described manner is 0.4mm, the thickness of resin sheet is 2.8mm, the height of the ridge shape lens of central portion is 0.165mm, the height of the ridge shape lens of end is 0.114mm, the aspect ratio of ridge shape lens is 0.413, the figuration rate of central portion is 71%, and the figuration rate of end is 49%.The thickness of the third layer of central portion is 0.230mm, and the thickness of the third layer of end is 0.088mm.
The height, aspect ratio, figuration rate etc. of the value of the y/nx of the lens obtained in embodiment and comparative example and ridge shape lens are shown in Table 1.
[table 1]
By the figuration rate of the central portion of the ridge shape lens in the lens that obtains in embodiment 1 ~ 5 and comparative example 3,4 and the relation of y/nx shown in Figure 1.
E1 ~ E5 in Fig. 1 represents that embodiment 1, embodiment 2, embodiment 3, embodiment 4, embodiment 5, C3, C4 represent comparative example 3, comparative example 4 respectively successively.
From Fig. 1 and table 1, the lens obtained in embodiment 1 ~ 5 is compared with the lens obtained in comparative example 3 and 4, and the aspect ratio of figuration rate and ridge shape lens is higher.
In addition, from comparative example 1 and 2, the figuration rate of the lens only made by acrylic resin (b) and the aspect ratio of ridge shape lens low, particularly when the thickness of resin sheet is thick, this tendency is large.
In addition, from comparative example 5, the lens only made by acrylic resin (a) cannot stably be produced, and the shape of lens also becomes uneven.
In addition, from comparative example 6, do not use the lens of multimanifold die, the thickness of the layer be made up of acrylic resin (a) there are differences extruding on width, and figuration rate becomes uneven.
As can be known from the above results, according to the manufacture method of lens of the present invention, even if high figuration rate also can be realized when the thick 3.0mm of reaching of the thickness of resin sheet, the lens that the aspect ratio of ridge shape lens is high can be obtained.
Label declaration
1: extrusion shaper
2: the T-shaped die head of multilayer extrusion
31: extrusion die roller
32: figuration mould roller
33,34: chill roll
4: lens
Claims (2)
1. an extrusion manufacture method for lens, it comprises:
First operation, extrusion molding is carried out to thermoplastic resin (A) and MFR (according to ISO1133 230 DEG C, the value that measures under the condition of the load 37.3N) thermoplastic resin (B) less than described thermoplastic resin (A), utilize multimanifold die obtain possessing in adjacent mode be made up of thermoplastic resin (A), the volume of per unit length is y (y is for positive number) and as the ground floor on top layer and the multilayer tablet of the molten condition of the second layer that is made up of thermoplastic resin (B); And
Second operation, the volume making to have multiple per unit length for the surface be made up of ground floor of the multilayer tablet meeting the molten condition obtained in the figuration mould of the groove of the x (x is positive number) of following formula (1) and the first operation closely sealed, form n (n is natural number) ridge shape lens
0.7≤y/nx≤2.0 (1)。
2. the extrusion manufacture method of lens as claimed in claim 1, it is characterized in that, described y, n, x meet following formula (2),
1.05≤y/nx≤1.4 (2)。
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012-241491 | 2012-11-01 | ||
| JP2012241491 | 2012-11-01 | ||
| PCT/JP2013/079784 WO2014069641A1 (en) | 2012-11-01 | 2013-11-01 | Lens sheet manufacturing method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104755247A true CN104755247A (en) | 2015-07-01 |
Family
ID=50627533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201380057299.8A Pending CN104755247A (en) | 2012-11-01 | 2013-11-01 | Lens sheet manufacturing method |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6046737B2 (en) |
| KR (1) | KR101749842B1 (en) |
| CN (1) | CN104755247A (en) |
| TW (1) | TWI590941B (en) |
| WO (1) | WO2014069641A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110650932A (en) * | 2017-06-08 | 2020-01-03 | 株式会社可乐丽 | Method for recycling interlayer film for laminated glass |
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| US5656209A (en) * | 1993-12-24 | 1997-08-12 | Roehm Gmbh Chemische Fabrik | Process for manufacture of Fresnel lenses |
| CN1756643A (en) * | 2003-03-04 | 2006-04-05 | 可乐丽股份有限公司 | Method for producing optical sheet, optical sheet, and method for producing lenticular lens sheet |
| CN101121307A (en) * | 2006-08-11 | 2008-02-13 | 住友化学株式会社 | Cascade film and lens film for forming lens shape |
| CN102307716A (en) * | 2009-01-29 | 2012-01-04 | 3M创新有限公司 | Optical films with internally comformable layers and method of making the films |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012144033A (en) * | 2010-07-01 | 2012-08-02 | Sumitomo Chemical Co Ltd | Method of manufacturing resin sheet |
| JP5648075B2 (en) * | 2012-02-01 | 2015-01-07 | 住友化学株式会社 | Method for manufacturing shape transfer resin sheet and resin sheet |
-
2013
- 2013-11-01 JP JP2014544613A patent/JP6046737B2/en not_active Expired - Fee Related
- 2013-11-01 KR KR1020157011079A patent/KR101749842B1/en active IP Right Grant
- 2013-11-01 WO PCT/JP2013/079784 patent/WO2014069641A1/en active Application Filing
- 2013-11-01 CN CN201380057299.8A patent/CN104755247A/en active Pending
- 2013-11-01 TW TW102139685A patent/TWI590941B/en active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3241429A (en) * | 1962-05-14 | 1966-03-22 | Pid Corp | Pictorial parallax panoramagram units |
| JPH04299329A (en) * | 1991-03-28 | 1992-10-22 | Toppan Printing Co Ltd | Production of both-side lenticular sheet |
| JPH04327937A (en) * | 1991-04-26 | 1992-11-17 | Sekisui Chem Co Ltd | Embossed polycarbonate sheet and its manufacture |
| US5656209A (en) * | 1993-12-24 | 1997-08-12 | Roehm Gmbh Chemische Fabrik | Process for manufacture of Fresnel lenses |
| JPH0831025A (en) * | 1994-07-18 | 1996-02-02 | Canon Inc | Production of substrate for optical information recording medium and apparatus for production thereof |
| CN1756643A (en) * | 2003-03-04 | 2006-04-05 | 可乐丽股份有限公司 | Method for producing optical sheet, optical sheet, and method for producing lenticular lens sheet |
| CN101121307A (en) * | 2006-08-11 | 2008-02-13 | 住友化学株式会社 | Cascade film and lens film for forming lens shape |
| CN102307716A (en) * | 2009-01-29 | 2012-01-04 | 3M创新有限公司 | Optical films with internally comformable layers and method of making the films |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110650932A (en) * | 2017-06-08 | 2020-01-03 | 株式会社可乐丽 | Method for recycling interlayer film for laminated glass |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20150064141A (en) | 2015-06-10 |
| JP6046737B2 (en) | 2016-12-21 |
| JPWO2014069641A1 (en) | 2016-09-08 |
| WO2014069641A1 (en) | 2014-05-08 |
| KR101749842B1 (en) | 2017-06-21 |
| TW201422407A (en) | 2014-06-16 |
| TWI590941B (en) | 2017-07-11 |
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Application publication date: 20150701 |