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High-barrier film for cup paper and preparation process of high-barrier film

A high-barrier film and cup paper technology, applied in the field of cup paper manufacturing, can solve the problems of difficult biodegradation of the cup paper film, poor environmental protection, poor thermal insulation performance, etc., achieve excellent thermal barrier effect, improve resistance Heat resistance, the effect of improving heat resistance

Pending Publication Date: 2022-07-29
ANHUI SHUNTONG PACKAGING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the problems in the prior art that the coating film of cup paper is difficult to biodegrade, has poor environmental protection, and poor heat insulation performance, resulting in invariable handling, the present invention provides a high barrier film for cup paper and its preparation process

Method used

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  • High-barrier film for cup paper and preparation process of high-barrier film
  • High-barrier film for cup paper and preparation process of high-barrier film
  • High-barrier film for cup paper and preparation process of high-barrier film

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Experimental program
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Effect test

Embodiment 1

[0029] The present embodiment provides a thermal insulation fiber, which is made by the following steps:

[0030] Step S1, mix 1.5g glass fiber with 30mL mass fraction of 30% acetone aqueous solution, take out after ultrasonic cleaning for 30min, put it in the corrosive solution after ultrasonic vibration for 10min, take out, put it in the modification solution, stir and react for 8h, use absolute ethanol Wash and dry to obtain modified glass fibers. The etching solution is composed of ammonium fluoride, 37% hydrochloric acid solution and deionized water according to the dosage ratio of 5g: 3mL: 250mL. The modified solution is composed of DMF, KH-560 and deionization according to the dosage. The ratio of 35mL: 0.1g: 2mL composition;

[0031] Step S2, add 200 mL of absolute ethanol into the solution containing 1.5 g of SiO 2 In the three-necked flask of aerogel, 3mL of 25% ammonia water and 2mL of γ-aminopropyltriethoxysilane were added after ultrasonication for 10min, magneti...

Embodiment 2

[0033] The present embodiment provides a thermal insulation fiber, which is made by the following steps:

[0034]Step S1, mix 2.0g glass fiber with 40mL mass fraction of 30% acetone aqueous solution, take out after ultrasonic cleaning for 30min, put it in the corrosive solution after ultrasonic vibration for 10min, take out, put it in the modification solution, stir and react for 10h, and then use anhydrous Ethanol washed and dried to obtain modified glass fibers. The etching solution was composed of ammonium fluoride, 37% hydrochloric acid solution and deionized water according to the dosage ratio of 5g: 3mL: 300mL. The modified solution was composed of DMF, KH-560 and deionized water according to The dosage ratio is 35mL: 0.2g: 2mL;

[0035] Step S2, adding 200mL absolute ethanol into the 2g SiO 2 In the three-necked flask of aerogel, 3mL of 25% ammonia water and 2mL of γ-aminopropyltriethoxysilane were added after sonicating for 10min, magnetically stirred at 30°C for 24h,...

Embodiment 3

[0042] The present embodiment provides a heat-resistant reinforcing component, which is made by the following steps:

[0043] Step S11: Place 60 g of pine rosin in a round-bottomed flask, under nitrogen protection, under mechanical stirring, heat up to 140 °C for 1 h, add 15 g of maleic anhydride in three times, with an interval of 3 min each time, then heat up to 170 °C, and stir the reaction After 2 hours, the temperature was lowered to 120 °C, and 120 mL of glacial acetic acid was added to reflux for 1 hour. After the reaction, the crude product was crystallized with glacial acetic acid to obtain acid anhydride monomer;

[0044] Step S12, add 35g of acid anhydride monomer, 9.2g of 1,1,1-trimethylolethane and tetrabutyl titanate into a three-necked flask equipped with a stirrer and a thermometer, and under nitrogen protection, heat up to 220°C, The reaction was stirred at normal pressure for 8 hours. After the reaction was completed, it was cooled to room temperature, aceton...

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Abstract

The invention relates to a high-barrier film for cup paper and a preparation process thereof, and belongs to the technical field of cup paper manufacturing, the high-barrier film comprises the following raw materials by weight: 60-90 parts of polylactic acid, 20-30 parts of polycaprolactone, 3-10 parts of a heat-resistant reinforcing component, 5-8 parts of thermal insulation fiber, 0.1 part of an anti-hydrolysis agent, 0.1-1 part of an anti-aging agent and 0.1-1 part of a processing aid; the preparation process comprises the following steps: carrying out melt extrusion granulation on polylactic acid, polycaprolactone, a heat-resistant reinforcing component, heat-insulating fibers, an anti-hydrolysis agent, an anti-aging agent and a processing aid in a twin-screw extruder to obtain a film granular material, then melting the film granular material, and spraying a film on cup body paper to obtain the high-barrier film for cup paper. The biodegradable barrier film is prepared by adopting polylactic acid as a base material, and the heat resistance and heat insulation property of the polylactic acid barrier film are improved by adding the heat-resistant reinforcing component and the heat insulation fiber into the raw materials of the film.

Description

technical field [0001] The invention belongs to the technical field of cup paper manufacturing, and in particular relates to a high barrier film for cup paper and a preparation process thereof. Background technique [0002] Cup paper is a kind of paper used to be processed into paper cups and other catering products. After the paper is formed, the post-processing process is carried out, mainly the lamination process. The surface of the paper is covered with a layer of PP or PE film to improve its barrier performance. , the existing film coating method is mainly lamination, which is to coat plastic particles on the surface of the paper through a casting machine to achieve the purpose of oil-proof, waterproof (relative) and heat-sealing, but PP or PE film is not biodegradable, and it is suitable for Environmental protection is unfavorable, and PP or PE film has poor thermal insulation effect, and it is easy to cause inconvenience or burns when using the cup prepared from it. P...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08L67/00C08K9/06C08K9/02C08K7/14C08K7/26C08K5/00C08J5/18
CPCC08J5/18C08J2367/04C08J2467/04C08J2467/00C08K9/06C08K9/02C08K7/14C08K7/26C08K5/0008
Inventor 李东霖朱远忠张先进
Owner ANHUI SHUNTONG PACKAGING MATERIAL
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