CN100519149C - Biaxial drawing micro-porous teflon film manufacturing method - Google Patents
Biaxial drawing micro-porous teflon film manufacturing method Download PDFInfo
- Publication number
- CN100519149C CN100519149C CNB2005101125931A CN200510112593A CN100519149C CN 100519149 C CN100519149 C CN 100519149C CN B2005101125931 A CNB2005101125931 A CN B2005101125931A CN 200510112593 A CN200510112593 A CN 200510112593A CN 100519149 C CN100519149 C CN 100519149C
- Authority
- CN
- China
- Prior art keywords
- elongation
- film
- phase
- numerical value
- biaxial stretch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
A single-stretching process for preparing the millipore polytetrafluoroethylene (PTFE) film with high air and moisture permeability and high water-proof effect includes such steps as providing the calendered PTFE film corona treating, stretching, fixating shape and rolling.
Description
Technical field
The invention relates to a kind of porous polyfluortetraethylefilm film and manufacture method thereof, especially refer to the made film of a kind of more simple manufacture method fast, it is to obtain through the polytetrafluoroethylene (PTFE) calendered film of sided corona treatment after extension process and typing, obtain a micro-porous polytetrafluoroethylene film and on film, form the homogeneity of pore size distribution, aperture, thickness and porosity, be one to possess highly-breathable, high moisture vapor permeability and good waterproof effect, and reach the lifting that overall process reaches effect more simply, fast.
Background technology
Known Teflon (Teflon) is a kind of resin, and its chemical name is a polytetrafluoroethylene (PTFE), is with tetrafluoroethene (C
2F
4) form through polymerization, because of Teflon be make by carbon atom and fluorine atom not hydrogeneous, so can not react with oxygen, it possesses heat-resisting, low temperature resistant, corrosion resistance, is not stained with multinomial characteristics such as viscosity, low frictional factor and self-lubricity, in addition, this Teflon is difficult for merging with other material, and other material also is difficult for being stained with sticking at, so one of material that the relevant dealer of most conduct is used.
Because of polytetrafluoroethylene (PTFE) has possessed aforesaid various advantages, so just there is the dealer that so-called ptfe sheet or diaphragm are made in its processing, and be the characteristic of porous, laminated in addition again on fabric or non-woven and as Filters or other purposes, as the content as shown in No. the 538164th, 592783, No. the 5234739th, 6080472,5750242, the United States Patent (USP), TaiWan, China patent announcement.
Hence one can see that; polytetrafluoroethylene (PTFE) has been applied on industry and the people's livelihood articles for use after processing is handled widely; so use via each relevant dealer institute desire or the field of utilization and produce otherness on the processing procedure at the polytetrafluoroethylene (PTFE) raw material; and protected the content shown in No. the 6702971st, 6852223,5098625,6228477,6410084,6676993,6854603,4096227, United States Patent (USP) by patent.
Be not difficult to learn that by the goods that processing procedure and processing procedure produced shown in above-mentioned the ptfe sheet of last gained or diaphragm all have porous feature, but these thin slices and diaphragm still have it to remain to be improved part, be the homogeneity of own pore size distribution of thin slice or diaphragm and pore size, can't effectively control within the specific limits.
Moreover, if improved, certainly will need in processing procedure, to increase the necessary processing procedure and the equipment of the required use of processing procedure at above-mentioned disappearance, its cost that significantly promotes also is a part that the dealer perplexs.
In addition, the processing procedure shown in above-mentioned is not difficult to learn the goods of producing through each loaded down with trivial details stage, causes the improper or carelessness of the control of a certain program wherein easily and causes defective products hurriedly to increase, and also can influence the production capacity output of goods except that wayward quality.
For this reason, how effectively to avoid above-mentioned drawback, be the direction of each relevant dealer's effort and development.
Do not reach perfect part in view of above-mentioned institute, this case inventor satisfies to be engaged in the sector experience for many years, the technology of relevant processing procedure of accumulation and goods, and the integration of being devoted to the equipment of these processing procedures and the required use of processing procedure is used, analyzed the relevance of the equipment of its processing procedure and processing procedure use, make it invent out processing procedure and the goods thereof that more are better than above-mentioned technology, and in line with excelsior spirit, actively research and development improve, and have the manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention to produce then.
Summary of the invention
The manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention, its main purpose is to provide a kind of simplification of biaxial stretch-formed porous polyfluortetraethylefilm thin film manufacture process, with control, the production capacity output that can promote quality, reduce the wastage and cost.
The manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention, secondly a main purpose is to provide a kind of film article that can obtain thickness homogeneity, porous distribution uniformity, pore size homogeneity and the porosity homogeneity of this film via processing procedure of the present invention via the polytetrafluoroethylene (PTFE) calendered film and the semi-finished product of sided corona treatment.
The manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention, its again a main purpose be to provide a kind of film article that possesses highly-breathable, high moisture vapor permeability and waterproof effect.
The simplification that can obtain biaxial stretch-formed porous polyfluortetraethylefilm thin film manufacture process by above-mentioned processing procedure and each processing procedure control important document is with control, the production capacity output that can promote quality, reduce the wastage and cost.
Control important document and can obtain polytetrafluoroethylene (PTFE) calendering diaphragm gets a thickness homogeneity, porous distribution uniformity and pore size homogeneity via processing procedure of the present invention film article by above-mentioned processing procedure and each processing procedure.
In sum, demand of the present invention is bright and clear and simple, for producing a desired effect, possesses dynamical creation, should be able to highlight the novelty and the dual important document of progressive of this case; Your auditor can further understand relevant the present invention for ease of and to reach technological means and the effect thereof that above-mentioned purpose adopts, exemplify preferred embodiment now and cooperate graphic being described as follows.
Description of drawings
Fig. 1 is a flow implementation illustration intention of the present invention;
Fig. 2 is the employed apparatus embodiments schematic diagram of flow process of the present invention;
Fig. 3 is half-finished displaing micro picture embodiment schematic diagram of the present invention;
Fig. 4 is the displaing micro picture embodiment schematic diagram of finished product of the present invention;
Fig. 5 is half-finished melting curve embodiment schematic diagram of the present invention;
Fig. 6 is the melting curve embodiment schematic diagram of finished product of the present invention;
Fig. 7 is a moisture permeability test data schematic diagram of the present invention.
[figure number explanation]
10 semi-finished product, 12 ' roller
20 extension processes, 13 ' roller
21 phase I were extended 14 ' first stretching wheel
22 second stage are extended 15 ' roller
23 pre-settings, 16 ' second stretching wheel
30 typings, 17 ' the 3rd stretching wheel
40 batch 18 ' the 4th stretching wheel
50 finished products, 19 ' first heater
10 ' charging wheel, 20 ' second heater
11 ' roller, 21 ' coiling roller
The specific embodiment
For the clear structure of the present invention of your auditor is formed, and the overall operation mode, cooperate graphic being described as follows now:
At first, characteristic with regard to the two-way stretched PTFE film of Teflon is analyzed, its Teflon is to utilize the polytetrafluoroethylene (PTFE) of super high molecular weight to be primary raw material, make two-way stretched PTFE film through special processing processing, this film utilizes the high magnification electron microscope to watch, can learn that it is by very significantly fiber and node are formed, through different temperature and extension ratios, and it is significantly different to cause fiber and node to have, the extension of big multiplying power, be not that existing fibre length is extended, split into trickleer fiber and littler node once again but will be linked to fiber and interfibrous node, form the film of so-called micron order fiber or the film of nano-scale fiber by division, and these films also to be industry at present be badly in need of applying on the product or assembly in each field.
Therefore patent of the present invention is to be that extension process and temperature control upward are the emphasis of main demand, also can obtain to simplify processing procedure, reduce cost and promote the purpose of production capacity output by this emphasis, moreover more can reach the purpose of thickness, pore size distribution, aperture and porosity homogeneity, and have the purpose of highly-breathable, high moisture vapor permeability and waterproof concurrently via the obtained polytetrafluoroethylene film of the present invention.
Seeing also shown in Figure 1ly, is the flow chart that gets manufacture method for the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention, its main flow process be with semi-finished product 10 after extension process 20, typing 30, reach the output of finished film 50 again by 40 processes of batching.
Please cooperate and consult Fig. 1, shown in Figure 2, be to be the flow chart of the manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention and the equipment of the required use of this flow process, the base stock of the required use of this processing procedure is semi-finished product 10,10 of these semi-finished product are defined as the general known sheet polytetrafluoroethylene (PTFE) calendered film that can buy and are a continuous strip, semi-finished product 10 are imported by charging wheel 10 ', through roller 11 ', 12 ', 13 ' enters extension process 20, and should extension process 20 comprise phase I extension 21, second stage extension 22 and pre-setting 23, when semi-finished product 10 are that web feed to the first stretching wheel 14 ' is through between the roller 15 ' and second stretching wheel 16 ' time, be defined as phase I extension 21, it is rollers 11 ' when utilizing charging that this phase I extends 21,12 ', 13 ' and first stretching wheel 14 ', speed difference between second stretching wheel 16 ', and then the quantity delivered of adjusting semi-finished product 10 and polytetrafluoroethylene (PTFE) calendering diaphragm is also bestowed the strength of longitudinal stretching simultaneously, the elongation of its phase I extension 21 is 1.5 times to the ratio of elongation of extending the elongation gained before 21 without the phase I, when being delivered between the 3rd stretching wheel 17 ' and the 4th stretching wheel 18 ', be defined as second stage and extend 22, it is the strength of bestowing cross directional stretch that this second stage extends 22, and when second stage extends 22 or carry out the heating process of pre-setting 23 before by first heater 19 ', second stage extension 22 its elongations that carried out in heating process are 4～8 times to the ratio of elongation of the elongation gained of phase I extension 21, because ratio of elongation is bigger, so need in the time of pre-setting 23 or in advance heating process reach second stage and extend 22 required elongations and promote the higher ductilities of diaphragm itself, and can avoid once extending and cause elongation excessive and cause diaphragm itself fracture, thickness, the uneven drawback of aperture and porosity, and this phase I extends 21, second stage extension 22 and pre-setting 23 are summarised as extension process 20, the overall elongation ratio of its extension process 20 is 6～12 times, when being delivered to second heater 20 ' through extension process 20, be defined as typing 30, this typing 30 is at extension process 20 thickness that produces, aperture and porosity reach the required requirement or the diaphragm of standard, the program that heats by second heater 20 ', to make diaphragm reach thickness, aperture and porosity homogeneity and fixing, avoid producing diaphragm and return the bad phenomenon of stretching (contracting), batching 40 by coiling roller 21 ' with the winding speed that does not suitably cause the film fracture at last also is finished product 50 outputs.
At the explanation and the application of above-mentioned processing procedure and device association, the control important document in each processing procedure program is as described below:
Semi-finished product: be to be a polytetrafluoroethylene (PTFE) calendering diaphragm through sided corona treatment, its diaphragm thickness is between 0.10～0.15mm, and width is between 160～300mm, and density is between 0.8～1.3g/cm
3, the surface is imporous state;
Extension process: comprise phase I extension, pre-setting and second stage and extend, its overall elongation ratio is between 6～12 times, it is the strength of bestowing longitudinal stretching that this phase I extends, it is simultaneously or the strength of carrying out the heating of pre-setting in advance and bestowing cross directional stretch that this second stage is extended, the elongation that the elongation that second stage is extended then extends greater than the phase I, the heating and temperature control of this pre-setting between 80～150 ℃, and the time that the heating process of pre-setting is controlled be 3～5 seconds;
Typing: its temperature is controlled between 300～400 ℃, and is 10 seconds in the time that heating process is controlled;
Batch;
Finished product: biaxial stretch-formed micro-porous polytetrafluoroethylene film, its film thickness can be according to actual demand control between between 0.03～0.06mm, width 1600mm, porosity is 80%～85%, it is 9000MM-H that water pressure resistance is to use the numerical value of the method for testing gained of JIS L-1092
2O is above (to contain 9000MM-H
2O), moisture permeability is to use the numerical value of method of testing gained of JIS L-1099A1 between 9995～11713g/M respectively
2Reach between * 24hrs and use the measured numerical value of ASTM E-96 between 13045～15445g/M
2Between * 24hrs;
The variation of the membrane structure characteristic that produces via the processing procedure of above-mentioned Main Stage control important document and each stage processing procedure of gained, mat are batched and are obtained the output of finished product and biaxial stretch-formed micro-porous polytetrafluoroethylene film.
See also shown in Figure 3ly, be the manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention, the architectural characteristic icon of its semi-finished product 10 and polytetrafluoroethylene (PTFE) calendering diaphragm is by can obviously finding out fibriilar distribution among the figure; Please consult shown in Figure 4 more simultaneously, manufacture method for the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention, the architectural characteristic icon of its finished product 50 and polytetrafluoroethylene film, by can obviously finding out fibrillation and node distribution among the figure, the difference of the architectural characteristic that is presented with original semi-finished product 10, its main difference are the homogeneity that the porosity, aperture, pore size distribution and the fibrillation that are produced between fibrillation and node connection and node organization distribute.
See also shown in Figure 5, the manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention, wherein, the melting curve of these semi-finished product 10 and polytetrafluoroethylene (PTFE) calendering diaphragm is by finding out among the figure, when this temperature continues to be heated to about 350 ℃ by about 50 ℃, can obtain a numerical value and be 344.89 ℃ endothermic peak, please consult shown in Figure 6 simultaneously, the melting curve of finished product 50 and polytetrafluoroethylene film is by finding out among the figure, when this temperature also continues to be heated to about 350 ℃ by about 50 ℃, can obtain a numerical value and be 336.51 ℃ endothermic peak, this endothermic peak numerical value and previous semi-finished product 10 measured numerical value are a minimum variation, in other words, by the finished product 50 of semi-finished product 10 by a manufacture method gained of the present invention, the variation difference of its melting curve so do not produce great difference because of processing procedure of the present invention causes finished product 50 and original semi-finished product 10 endothermic peaks, and obtains the biaxial stretch-formed micro-porous polytetrafluoroethylene film of a stability within limits.
See also shown in Figure 7, polytetrafluoroethylene film and finished product 50 sampling and testings for processing procedure gained of the present invention, utilize the data of the measured moisture permeability numerical value of method of testing of JIS L-1099A1 and ASTM E-96, wherein, the measured numerical value of this JIS L-1099A1 is between 9995～11713g/M
2Between * 24hrs, the measured numerical value of this ASTM E-96 is between 13045～15445g/M
2Between * 24hrs, all be higher than the moisture permeability numerical value of general known film, so by finding out in the data that this finished product 50 is one to possess the micro-porous polytetrafluoroethylene film of high moisture permeability.
The method of testing of above-mentioned water pressure resistance and moisture permeability does not limit the moisture permeability and the numerical value thereof of the micro-porous polytetrafluoroethylene film of the present invention; any numerical value that records with other method is converted into method of testing used in the present invention and between between the numerical value of gained, all is protected in claim.
The simplification that can obtain biaxial stretch-formed porous polyfluortetraethylefilm thin film manufacture process by above-mentioned processing procedure and each processing procedure control important document is with control, the production capacity output that can promote quality, reduce the wastage and cost.
Control important document and can obtain polytetrafluoroethylene (PTFE) calendering diaphragm gets a thickness homogeneity, porous distribution uniformity and pore size homogeneity via processing procedure of the present invention film article by above-mentioned processing procedure and each processing procedure.
Control important document and can obtain the film article that possesses highly-breathable, high poisture-penetrability and waterproof effect by above-mentioned processing procedure and each processing procedure.
As mentioned above, the manufacture method of the biaxial stretch-formed micro-porous polytetrafluoroethylene film of the present invention can reach described effect purpose by above-mentioned processing procedure, really so offer the application of novel patent in accordance with the law; Yet, above implementation and graphic shown in, be this creation preferred embodiment, be not to limit to this creation with this, be with, approximate, identical with the structure of this creation, device, feature etc. such as, all should belong to this creation found purpose and claim in.
Claims (4)
1, a kind of manufacture method of biaxial stretch-formed micro-porous polytetrafluoroethylene film is characterized in that: this method comprises the following steps:
Semi-finished product: be to be a polytetrafluoroethylene (PTFE) calendering diaphragm through sided corona treatment, its diaphragm thickness is between 0.10～0.15mm, and width is between 160～300mm, and density is between 0.8～1.3g/cm
3, the surface is imporous state;
Extension process: comprise phase I extension, pre-setting and second stage and extend, its overall elongation ratio is between 6～12 times, it is the strength of bestowing longitudinal stretching that this phase I extends, it is simultaneously or the strength of carrying out the heating of pre-setting in advance and bestowing cross directional stretch that this second stage is extended, the elongation that the elongation that second stage is extended then extends greater than the phase I, the heating and temperature control of this pre-setting between 80～150 ℃, and the time that the heating process of pre-setting is controlled be 3～5 seconds;
Typing: its temperature is controlled between 300～400 ℃, and is 10 seconds in the time that heating process is controlled;
Batch;
Finished product: biaxial stretch-formed micro-porous polytetrafluoroethylene film, its film thickness can be according to actual demand control between between 0.03～0.06mm, width 1600mm, porosity is 80%～85%, it is 9000MM-H that water pressure resistance is to use the numerical value of the method for testing gained of JIS L-1092
2More than the O, the numerical value of the method for testing gained of the use JIS L-1099A1 of moisture permeability system is between 9995～11713g/M
2Between * 24hrs.
2, the manufacture method of biaxial stretch-formed micro-porous polytetrafluoroethylene film as claimed in claim 1, it is characterized in that: the elongation that extends of this is 1.5 times to the ratio of elongation of the elongation gained before extending without the phase I phase I, and the ratio of elongation that this second stage is extended the elongation gained that its elongation extends the phase I is 4～8 times.
3, the manufacture method of biaxial stretch-formed micro-porous polytetrafluoroethylene film as claimed in claim 1 is characterized in that: this moisture permeability also can be used the method for testing of ASTM E-96, and its measured numerical value is between 13045～15445g/M
2Between * 24hrs.
4, the manufacture method of biaxial stretch-formed micro-porous polytetrafluoroethylene film as claimed in claim 1 is characterized in that: the method for testing of this water pressure resistance and moisture permeability numerical value, also available other known method of testing records this numerical value.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101125931A CN100519149C (en) | 2005-10-12 | 2005-10-12 | Biaxial drawing micro-porous teflon film manufacturing method |
| HK07111233.7A HK1102791A1 (en) | 2005-10-12 | 2007-10-17 | A manufacturing method of biaxially drawn porous polytetrafluoroethylene membrane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101125931A CN100519149C (en) | 2005-10-12 | 2005-10-12 | Biaxial drawing micro-porous teflon film manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1947991A CN1947991A (en) | 2007-04-18 |
| CN100519149C true CN100519149C (en) | 2009-07-29 |
Family
ID=38017659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005101125931A Expired - Fee Related CN100519149C (en) | 2005-10-12 | 2005-10-12 | Biaxial drawing micro-porous teflon film manufacturing method |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN100519149C (en) |
| HK (1) | HK1102791A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5082740B2 (en) * | 2007-10-09 | 2012-11-28 | ダイキン工業株式会社 | Biaxially stretched tape manufacturing method |
| JP6542636B2 (en) * | 2014-10-16 | 2019-07-10 | 日東電工株式会社 | Sound-permeable film, sound-permeable film member provided with the same, microphone and electronic device |
-
2005
- 2005-10-12 CN CNB2005101125931A patent/CN100519149C/en not_active Expired - Fee Related
-
2007
- 2007-10-17 HK HK07111233.7A patent/HK1102791A1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| HK1102791A1 (en) | 2007-12-07 |
| CN1947991A (en) | 2007-04-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4049589A (en) | Porous films of polytetrafluoroethylene and process for producing said films | |
| CN101920559B (en) | Preparation method and product of polytetrafluoroethylene (PTFE) film | |
| Ranjbarzadeh-Dibazar et al. | Lubricant facilitated thermo-mechanical stretching of PTFE and morphology of the resulting membranes | |
| JP2012001591A (en) | Polytetrafluoroethylene porous membrane with small elongation anisotropy and process for production thereof | |
| CN100519149C (en) | Biaxial drawing micro-porous teflon film manufacturing method | |
| CN104552969B (en) | A kind of preparation technology of microporous teflon membran | |
| CN108912359A (en) | A kind of high bubble pressure microporous teflon membran and preparation method thereof | |
| CN109621737A (en) | The preparation method of the PTFE/PFA composite membrane of high porosity | |
| CN103102626B (en) | Preparation method for self-bonding flexible PTFE (polytetrafluorethylene) membrane belt | |
| CN111849097A (en) | Preparation method of high-frequency low-dielectric material | |
| Jia et al. | Microstructure and properties of microcellular silicone rubber foams with improved surface quality | |
| CN103687901B (en) | The manufacture method of micro-porous polyethylene film | |
| Pagano et al. | Relationships between size and mechanical properties of scaffold-like structures | |
| CN116854975B (en) | Antistatic film and preparation method thereof | |
| CN111645308A (en) | Preparation method of high-uniformity expanded PTFE (Polytetrafluoroethylene) membrane | |
| CN112026156A (en) | Method for ensuring uniform transverse thickness of biaxially oriented PTFE (polytetrafluoroethylene) film | |
| CN116198137A (en) | Porous polytetrafluoroethylene membrane and preparation method and application thereof | |
| JP2007016058A (en) | Method for producing porous polytetrafluoroethylene membrane and porous polytetrafluoroethylene membrane | |
| CN108905638A (en) | A kind of preparation method of high performance membrane filtering material | |
| CN104822508A (en) | Method for manufacturing stretched film | |
| JPH03169622A (en) | Production of open cell foam of olefin-based resin | |
| KR20070040585A (en) | Manufacturing method of uniaxially drawn porous polytetrafluoroethylene membrane | |
| Ray et al. | Permeation studies of tetrahydrofuran–water mixtures by pervaporation experiments | |
| US20070080109A1 (en) | Manufacturing method of uniaxially drawn porous polytetrafluoroethylene membrane | |
| US7211210B2 (en) | Dry fibrillated PTFE film and its method of manufacture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: DE Ref document number: 1102791 Country of ref document: HK |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| REG | Reference to a national code |
Ref country code: HK Ref legal event code: GR Ref document number: 1102791 Country of ref document: HK |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090729 Termination date: 20171012 |