High-barrier seven-layer co-extrusion film and preparation method thereof

A high-barrier, co-extruded film technology, used in chemical instruments and methods, layered products, synthetic resin layered products, etc., to achieve the effects of improving molding processability, improving thermal stability, and good support.

Inactive Publication Date: 2020-06-09
SHANGHAI MAIGAO NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through patent search, it is found that the current patent has not reported the use of this material as a film barrier layer

Method used

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  • High-barrier seven-layer co-extrusion film and preparation method thereof
  • High-barrier seven-layer co-extrusion film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] At room temperature, put 95.7 parts of isophorone diisocyanate and 0.259 parts of dibutyltin dilaurate into the reaction kettle in sequence, pass through dry compressed air, start stirring, and add 528.1 parts of fluorine-containing polyether diol in 3 batches ( Hydroxyl value 61mg·KOH / g). Control the reaction temperature not to exceed 45°C. After the feeding was completed, the reaction was carried out at 40-45° C., and the NCO content was detected by the di-n-butylamine-toluene method after 1 h. When the NCO value reaches 1.93%, add 20.98 parts of 2-ethyl-1,3-hexanediol, raise the temperature to 75°C, and react until the NCO content is 0. Cool down to 40°C and discharge to obtain fluorine-containing polyurethane elastomer.

[0030] Put metallocene polyethylene and low density polyethylene in a mass ratio of 6:4 into a high-speed mixer, and mix for 7 to 8 minutes at 1000 rpm to obtain a polyolefin layer raw material. Put the fluorine-containing polyurethane elastomer...

Embodiment 2

[0033] At room temperature, 100.6 parts of isophorone diisocyanate and 0.312 parts of dibutyltin dilaurate were successively put into the reaction kettle, dry compressed air was passed through, stirring was started, and 708.56 parts of fluorine-containing polyether diol were added in 3 batches ( Hydroxyl value 61mg·KOH / g). Control the reaction temperature not to exceed 45°C. After the feeding was completed, the reaction was carried out at 40-45° C., and the NCO content was detected by the di-n-butylamine-toluene method after 1 h. When the NCO value reaches 3.68%, add 33.08 parts of 2-ethyl-1,3-hexanediol, raise the temperature to 75°C, and react until the NCO content is 0. Cool down to 40°C and discharge to obtain fluorine-containing polyurethane elastomer.

[0034] Put metallocene polyethylene and low density polyethylene in a mass ratio of 6.5:3.5 into a high-speed mixer, and mix for 7 to 8 minutes at 1000 rpm to obtain a polyolefin layer raw material. Put the fluorine-co...

Embodiment 3

[0037] At room temperature, put 93.9 parts of toluene diisocyanate (TDI-80) and 0.230 parts of dibutyltin dilaurate into the reaction kettle in sequence, pass in dry compressed air, start stirring, and add 806.58 parts of fluorine-containing polyether binary in 5 batches. Alcohol (hydroxyl value 50mg·KOH / g). Control the reaction temperature not to exceed 50°C. After the feeding was completed, the reaction was carried out at 40-50° C., and the NCO content was detected by the di-n-butylamine-toluene method after 1 h. When the NCO value reaches 1.68%, add 28.81 parts of 2-butyl-2-ethyl-1,3-propanediol, raise the temperature to 75°C, and react until the NCO content is 0. Cool down to 40°C and discharge to obtain fluorine-containing polyurethane elastomer.

[0038] Put metallocene polyethylene and low density polyethylene in a mass ratio of 6:4 into a high-speed mixer, and mix for 7 to 8 minutes at 1000 rpm to obtain a polyolefin layer raw material. Put the fluorine-containing p...

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Abstract

The invention discloses a high-barrier seven-layer co-extrusion film by using fluorine-containing polyurethane as a barrier material. The high-barrier seven-layer co-extrusion film is structurally composed of a polyolefin layer (1), a polyamide layer (2), a bonding layer (3), a fluorine-containing polyurethane layer (4), a bonding layer (5), a polyamide layer (6) and a polyolefin layer (7) in sequence. The invention also provides the high-barrier seven-layer co-extrusion film and a preparation method thereof.

Description

technical field [0001] The invention relates to the technical field of films, in particular to the technical field of co-extruded films. Background technique [0002] High-barrier film refers to protecting the products in the package from the penetration of small molecules such as pollutants, oxygen, water vapor, liquids and odors, and at the same time preventing the products in the package from seeping out of the packaging film. There are a wide variety of barrier film materials on the market today, and their properties vary. For example, PVDC (polyvinylidene chloride), EVOH (ethylene-vinyl alcohol copolymer), aluminum-plastic composite films, etc. all have different defects, and their use is limited. For example, although PVDC has high barrier properties, it contains chlorine. During processing and reprocessing, it will generate chlorine-containing organic chemicals such as hydrochloric acid and dioxin, which are not conducive to the environment and products, and are grad...

Claims

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Application Information

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IPC IPC(8): B32B27/08B32B27/34B32B27/40B32B27/32B32B7/12B32B33/00C08G18/32C08G18/50C08G18/66C08G18/75B29B7/00B29C55/28
CPCB29B7/002B29C55/28B32B7/12B32B27/08B32B27/32B32B27/327B32B27/34B32B27/40B32B33/00B32B2250/24B32B2307/50B32B2307/7244B32B2307/7246C08G18/3206C08G18/5015C08G18/6674C08G18/755
Inventor 刘小翔
Owner SHANGHAI MAIGAO NEW MATERIAL TECH
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