CN103496238A

CN103496238A - High-strength nano-film and production method thereof

Info

Publication number: CN103496238A
Application number: CN201310434274.7A
Authority: CN
Inventors: 刘荣
Original assignee: SUZHOU HANXIN PLASTIC Co Ltd
Current assignee: SUZHOU HANXIN PLASTIC Co Ltd
Priority date: 2013-09-23
Filing date: 2013-09-23
Publication date: 2014-01-08

Abstract

The invention relates to a high-strength nano-film. The high-strength nano-film comprises three parts, namely an outer layer, a middle layer and an inner layer, wherein the outer layer accounts for 40% by weight, the middle layer accounts for 20% by weight, and the inner layer accounts for 40% by weight; the variety and amount of adjuvant added to the outer and inner layers are determined through tests, thus the strength of a product can be improved as much as possible on the basis that the original properties of the product are not damaged. The invention further provides a production method of the film, which comprises the steps of (1) mixing materials; (2) proportioning the materials; (3) carrying out film blowing. The film provided by the invention has the characteristics of high surface flatness, easiness in being subjected to corona, easiness in cladding and high strength, and continuous production can be realized through a film blowing machine by combining material proportioning equipment.

Description

A kind of high-strength nano film and production method thereof

Technical field

The present invention relates to the film production manufacture field, specifically a kind of high-strength nano film and production method thereof.

Background technology

Blown film (BlowMembrane) is a kind of plastic working method, refers to the plastic pellet heating and melting is blown out to a kind of plastic processing of film again.If the film blown out with virgin material, color and luster is even, and clean, finished product stretches.If the plastic pellet made from the waste plastics reclaimed usually will add pigment when making film, the film of making may be just painted irregular, crisp and easily broken, and price is also lower.Blown film material by professional inflation film manufacturing machine production is applicable to various high-grade blister-packs.This film is due to its good barrier property, fresh-keeping, damp proof, frost protection, and oxygen barrier, oil resistant, can be widely used in the weight packing.As various fresh fruits, meat product, pickles, fresh milk, liquid beverage, medical supplies etc.If non-professional inflation film manufacturing machine or inflation film manufacturing machine do not make on sound lines in process, the coating materials of making so may be also substandard products.Most of PE are for the blown film film processed, and general low density PE (LDPE) or linearity are hanged down close PE(LLDPE) all available.The HDPE film-grade is generally used for the place that requires superior draftability and fabulous barrier properties.For example, the HDPE film is usually used in commodity bag, groceries bag and food Package.The PE processing film is generally by common blown film processing or the flat processing method of squeezing.

Due to the scope difference of film application, the characteristic of requirement has very large difference, also there is no a kind of easy volume production, high, the easy corona of surface smoothness, the easy high film of compound, intensity at present.

Summary of the invention

The present invention is above technical problem just, and a kind of easy volume production, high, the easy corona of surface smoothness, the easy high film of compound, intensity are provided.

The present invention is achieved through the following technical solutions:

A kind of film; comprise skin, middle level, internal layer three parts; the each several part proportion of composing is (percentage by weight): outer 40 parts; 20 parts, middle level; 40 parts of internal layers; its ectomesoderm is comprised of LDPE2420H, LLDPE920NT, PC Merlon, nano flame retardant compound, and each component ratio accounts for 25 parts～40 parts, 5 parts～20 parts of PC Merlon, nano flame retardant compound 5-30 part for (percentage by weight): LDPE2420H accounts for 55 parts～60 parts, LLDPE920NT;

The preparation method of described nano flame retardant complexing agent is:

(1) silicon hydroxyapatite, red phosphorus, concave convex rod, hydrotalcite, imvite, titanium dioxide, calcite, kaolin are mixed according to the mass fraction proportioning of 25-35:15-20:10-15: 10-15:8-10:8-10:7-8:5-7, join in the mixed solution of 200 parts of methyl-sulfoxides (DMSO) and 50 parts of methyl alcohol, in 65 ℃, stir 60 hours, filter, and wash and remove excessive methyl-sulfoxide (DMSO) for 3 times with the hot ethanol of 60 ℃ of temperature, put into vacuum drying chamber, dry 24 hours of 60 ℃ of temperature, grinding is sieved, and obtains the modified flame-retardant compound one time;

(2), 1 part of modified flame-retardant compound, 10 parts of potassium acetates and 25 parts of distilled water are mixed, in temperature 50 C, stir more than 10 hours, in 30 ℃ of temperature, first under ultrasonic electric power 350W condition, disperse 2.5 hours, and then disperse 3 hours under ultrasonic electric power 250W condition.Filter, and wash 3 times with distillation, 80 ℃ of vacuum drying 24 hours, grinding is sieved, and obtains twice-modified fire-retardant compound;

(3), above-mentioned 1 part of twice-modified fire-retardant compound is disperseed to 40min at the 600W power ultrasonic, be heated to 90 ℃ with constant temperature heating device, and stir (1200r/min) 60 minutes with mechanical agitator; Obtain the nano flame retardant compound; Middle level is comprised of LDPE2420H, LLDPE920NT, and each component ratio accounts for 60 parts～70 parts for (percentage by weight): LDPE2420H accounts for 30 parts～40 parts, LLDPE920NT; Internal layer is comprised of LDPE2426H, MDPE5401, LLDPE218W, LLDPE920NT, PC Merlon, and each component ratio accounts for 20 parts～30 parts, LLDPE218W and accounts for 20 parts～30 parts, LLDPE920NT and account for 1 part～10 parts of 20 parts～30 parts, PC Merlon for (percentage by weight): LDPE2426H accounts for 20 parts～30 parts, MDPE5401.

A kind of production method of film comprises the following steps:

Step 1, batch mixing, stir each raw material to scale and make former mixed materials for later use by the percentage by weight of skin, middle level, each component of internal layer;

Step 2, batching, the former mixed material by the percentage by weight of skin, middle level, internal layer prepared by step 1 is prepared burden;

Step 3, blown film, adopt the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment to produce the film needed.

Film provided by the invention has high, the easy corona of surface smoothness, easy high characteristics of compound, intensity, and can, in conjunction with dispensing equipment, by inflation film manufacturing machine, realize producing continuously.Fire retardant prepared by the present invention is not halogen-containing, organic matter, and asepsis environment-protecting, have a extensive future; The present invention carries out twice-modified, such benefit: increase the reactivity point, improve modified effect; In the time of modification, can steam again except the moisture in system, dry and modification is carried out simultaneously, has improved operating efficiency; Have a large amount of physics and chemistry adsorbed water in nano silicone hydroxyapatite, concave convex rod, imvite, kaolin etc. self micropore, at high temperature produce water vapour, blocking-up oxygen, absorb heat, reaches multiple fire-retardant effect; Powerful absorption property can effectively improve the synergy of several fire retardants, stops and is raise by the fire retardant matter temperature, has improved flame retarding efficiency; The aboundresources such as silicon hydroxyapatite, concave convex rod, imvite, kaolin, greatly reduce the industrial cost of fire retardant, and also the Application and Development for attapulgite provides a new way; The present invention adopts the solwution method ultrasonic wave to disperse and the mechanical high-speed agitator stirs, make fire retardant separately component reached the nanoscale dispersion in solution, effectively avoided the autoxidation to composite, mutual Synergistic, thus make composite there is better mechanical property.

The specific embodiment

Below in conjunction with specific embodiment, the present invention will be further described.

Embodiment 1

At first, by weight percentage by the LDPE2420H of 60 parts, the LLDPE920NT of 20 parts, the PC Merlon of 10 parts, 10 parts of nano flame retardant compounds stir and make outer former mixed material, by weight percentage by the LDPE2420H of 35 parts, the LLDPE920NT of 65 parts stirs and makes the former mixed material in middle level, by weight percentage by the LDPE2426H of 25 parts, the MDPE5401 of 25 parts, the LLDPE218W of 25 parts, the LLDPE920NT of 24 parts stirs, the PC Merlon of 1 part is mixed and is evenly made the former mixed material of internal layer, by weight percentage then by the former mixed material of skin, the former mixed material in middle level, the former mixed material of internal layer is by outer 40 parts, 20 parts, middle level, 40 parts of internal layers are prepared burden, after having prepared burden, can adopt the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment to produce the film needed.

Embodiment 2

At first, by weight percentage by the LDPE2420H of 55 parts, the LLDPE920NT of 25 parts, the PC Merlon of 10 parts, 10 parts of nano flame retardant compounds stir and make outer former mixed material, by weight percentage by the LDPE2420H of 30 parts, the LLDPE920NT of 70 parts stirs and makes the former mixed material in middle level, by weight percentage by the LDPE2426H of 20 parts, the MDPE5401 of 30 parts, the LLDPE218W of 20 parts, the LLDPE920NT of 20 parts, the PC Merlon of 10 parts stirs and makes the former mixed material of internal layer, by weight percentage then by the former mixed material of skin, the former mixed material in middle level, the former mixed material of internal layer is by outer 40 parts, 20 parts, middle level, 40 parts of internal layers are prepared burden, after having prepared burden, can adopt the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment to produce the film needed.

Embodiment 3

At first, by weight percentage by the LDPE2420H of 48 parts, the LLDPE920NT of 16 parts, the PC Merlon of 16 parts, 20 parts of nano flame retardant compounds stir and make outer former mixed material, by weight percentage by the LDPE2420H of 40 parts, the LLDPE920NT of 60 parts stirs and makes the former mixed material in middle level, by weight percentage by the LDPE2426H of 30 parts, the MDPE5401 of 20 parts, the LLDPE218W of 25 parts, the LLDPE920NT of 20 parts, the PC Merlon of 5 parts stirs and makes the former mixed material of internal layer, by weight percentage then by the former mixed material of skin, the former mixed material in middle level, the former mixed material of internal layer is by outer 40 parts, 20 parts, middle level, 40 parts of internal layers are prepared burden, after having prepared burden, can adopt the inflation film manufacturing machine blow molding of being furnished with Automatic batching equipment to produce the film needed.

Through test of many times, prove, it is the most obvious that the PC Merlon improves intensity effect.And, along with the increase of addition, its intensity also shows a rising trend.

Claims

1. a high-strength nano film; comprise skin, middle level, internal layer three parts; the each several part proportion of composing is (percentage by weight): outer 40 parts; 20 parts, middle level; 40 parts of internal layers; its ectomesoderm is comprised of LDPE2420H, LLDPE920NT, PC Merlon, nano flame retardant compound, and each component ratio accounts for 25 parts～40 parts, 5 parts～20 parts of PC Merlon, nano flame retardant compound 5-30 part for (percentage by weight): LDPE2420H accounts for 55 parts～60 parts, LLDPE920NT;

The preparation method of described nano flame retardant complexing agent is:

(2), 1 part of modified flame-retardant compound, 10 parts of potassium acetates and 25 parts of distilled water are mixed, stir more than 10 hours in temperature 50 C, in 30 ℃ of temperature, first disperse 2.5 hours under ultrasonic electric power 350W condition, and then disperse 3 hours under ultrasonic electric power 250W condition

Filter, and wash 3 times with distillation, 80 ℃ of vacuum drying 24 hours, grinding is sieved, and obtains twice-modified fire-retardant compound;

(3), above-mentioned 1 part of twice-modified fire-retardant compound is disperseed to 40min at the 600W power ultrasonic, be heated to 90 ℃ with constant temperature heating device, and stir (1200r/min) 60 minutes with mechanical agitator; Obtain the nano flame retardant compound; Middle level is comprised of LDPE2420H, LLDPE920NT, and each component ratio accounts for 60 parts～70 parts for (percentage by weight): LDPE2420H accounts for 30 parts～40 parts, LLDPE920NT; Internal layer is comprised of LDPE2426H, MDPE5401, LLDPE218W, LLDPE920NT, PC Merlon, and each component ratio accounts for 20 parts～30 parts, LLDPE218W and accounts for 20 parts～30 parts, LLDPE920NT and account for 20 parts～30 parts, PC Merlon and account for 1～10 part for (percentage by weight): LDPE2426H accounts for 20 parts～30 parts, MDPE5401.

2. a kind of film according to claim 1, is characterized in that outer each component ratio is that LDPE2420H accounts for 60 parts, LLDPE920NT and accounts for 30 parts, 5 parts of PC Merlon, 5 parts of nano flame retardant compounds; Each component ratio of middle level is that LDPE2420H accounts for 35 parts, LLDPE920NT and accounts for 65 parts; Each component ratio of internal layer is that LDPE2426H accounts for 25 parts, MDPE5401 and accounts for 25 parts, LLDPE218W and account for 25 parts, LLDPE920NT and account for 24 parts, PC Merlon and account for 1 part.

3. a kind of film according to claim 1, is characterized in that outer each component ratio is that LDPE2420H accounts for 55 parts, LLDPE920NT and accounts for 15 parts, 10 parts of PC Merlon, 20 parts of nano flame retardant compounds; Each component ratio of middle level is that LDPE2420H accounts for 30 parts, LLDPE920NT and accounts for 70 parts; Each component ratio of internal layer is that LDPE2426H accounts for 20 parts, MDPE5401 and accounts for 30 parts, LLDPE218W and account for 20 parts, LLDPE920NT and account for 20 parts, PC Merlon and account for 10 parts.

4. a kind of film according to claim 1, is characterized in that outer each component ratio is that LDPE2420H accounts for 58 parts, LLDPE920NT and accounts for 26 parts, 10 parts of PC Merlon, 6 parts of nano flame retardant compounds; Each component ratio of middle level is that LDPE2420H accounts for 40 parts, LLDPE920NT and accounts for 60 parts; Each component ratio of internal layer is that LDPE2426H accounts for 30 parts, MDPE5401 and accounts for 20 parts, LLDPE218W and account for 25 parts, LLDPE920NT and account for 20 parts, PC Merlon and account for 5 parts.

5. the production method of a film comprises the following steps: