CN103481615A - High-temperature resistant nano film and production method thereof - Google Patents

Abstract

The invention relates to a high-temperature resistant nano film which comprises the following three parts in parts by weight: 40 parts of an outer layer, 20 parts of a middle layer and 40 parts of an inner layer. High-temperature resistant ingredients are added into both the inner layer and the outer layer, so that the finished product can resist to high temperature than like products. The invention further provides a production method of the film, which comprises the following steps: step 1, mixing; step 2, batching; step 3, film blowing. The film provided by the invention has the characteristics of high surface evenness, easiness for corona and compounding, high strength and high-temperature resistance and can be continuously produced by a film blowing machine in combination with batching equipment.

Description

A kind of high-temperature resistant nano film and production method thereof

Technical field

The present invention relates to the film production manufacture field, specifically a kind of high-temperature resistant 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 do not have at present a kind of easy volume production, high, the easy corona of surface smoothness, easily compound, intensity is high, resistant to elevated temperatures film.

Summary of the invention

The present invention is above technical problem just, provide a kind of easy volume production, high, the easy corona of surface smoothness, easily compound, intensity is high, resistant to elevated temperatures film.

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, PBT polybutylene terephthalate (PBT), PC Merlon, nano flame retardant compound, and each component ratio accounts for 25 parts～40 parts, 5 parts～10 parts of PBT polybutylene terephthalate (PBT)s, 5 parts～10 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) is by the silicon hydroxyapatite, red phosphorus, concave convex rod, hydrotalcite, imvite, titanium dioxide, calcite, kaolin mixes 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, obtain a modified flame-retardant compound, (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, PBT polybutylene terephthalate (PBT), 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, PBT polybutylene terephthalate (PBT) and account for 5 parts～10 parts 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 have high, the easy corona of surface smoothness, easily compound, intensity is high, resistant to elevated temperatures characteristics, and can be 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 30 parts, the PBT polybutylene terephthalate (PBT) of 5 parts, the PC Merlon of 5 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 20 parts, the PBT polybutylene terephthalate (PBT) 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.

Embodiment 2

At first, by weight percentage by the LDPE2420H of 45 parts, the LLDPE920NT of 15 parts, the PBT polybutylene terephthalate (PBT) of 10 parts, the PC Merlon of 10 parts, 20 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 20 parts, the LLDPE218W of 20 parts, the LLDPE920NT of 30 parts, the PBT polybutylene terephthalate (PBT) 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.

The preparation method of described nano flame retardant complexing agent is: (1) is by the silicon hydroxyapatite, red phosphorus, concave convex rod, hydrotalcite, imvite, titanium dioxide, calcite, kaolin mixes 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, obtain a modified flame-retardant compound, (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.

Through test of many times, prove, PBT polybutylene terephthalate (PBT) and PC Merlon mixed in equal amounts dispersiveness are best, and effect is the most obvious.And, along with the increase of addition, its high temperature tolerance and intensity also show a rising trend.

Film provided by the invention have high, the easy corona of surface smoothness, easily compound, intensity is high, resistant to elevated temperatures characteristics, and can be 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.

Claims (2)

1. a high-temperature resistant 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 by LDPE2420H, LLDPE920NT, the PBT polybutylene terephthalate (PBT), the PC Merlon, the nano flame retardant compound forms, each component ratio accounts for 55 parts～60 parts for (percentage by weight): LDPE2420H, LLDPE920NT accounts for 25 parts～40 parts, 5 parts～10 parts of PBT polybutylene terephthalate (PBT)s, 5 parts～10 parts of PC Merlon, nano flame retardant compound 5-30 part, the preparation method of described nano flame retardant complexing agent is: (1) is by the silicon hydroxyapatite, red phosphorus, concave convex rod, hydrotalcite, imvite, titanium dioxide, calcite, kaolin mixes 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, obtain a modified flame-retardant compound, (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, PBT polybutylene terephthalate (PBT), 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, PBT polybutylene terephthalate (PBT) and account for 5 parts～10 parts for (percentage by weight): LDPE2426H accounts for 20 parts～30 parts, MDPE5401.

2. the production method of a 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.