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An environmentally friendly and degradable thermal insulation food packaging bag

A packaging bag and food technology, which is applied in the field of new materials, can solve the problems of heat-insulating coating peeling off and weakening heat-insulating effect of packaging bags, and achieve the effects of avoiding softening and deformation, excellent heat-insulating effect, and easy promotion and application

Active Publication Date: 2022-03-22
安徽天路新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent CN2014104285151 discloses a method for making a metal-zinc oxide nanocomposite heat-insulating packaging film. The polyethylene plastic film is dipped in a composite sol composed of aluminum sol and silver-zinc oxide sol, and coated on the surface of the polyethylene plastic film. In this way, a film with excellent heat insulation effect can be obtained, but the biggest problem with this heat insulation film is that during the transportation process, the collision and friction between the packaging bags will easily cause the heat insulation coating to fall off, resulting in the weakening of the heat insulation effect of the packaging bag

Method used

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  • An environmentally friendly and degradable thermal insulation food packaging bag

Examples

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Comparison scheme
Effect test

Embodiment 1

[0023] An environmentally friendly and degradable heat-insulating food packaging bag, the specific preparation method is as follows:

[0024] 1) Mix ethyl orthosilicate, absolute ethanol, deionized water and concentrated hydrochloric acid according to a certain ratio of substances, stir at a high speed of 800r / min for 2h, then add trimethylchlorosilane and February Dibutyltin silicate, under the condition of 30°C, stirred and reacted at a speed of 150r / min for 3h, and then stood still for 40h to obtain a modified silica sol;

[0025] 2) Mix butyl titanate, triethanolamine and absolute ethanol according to a certain ratio of substances and stir evenly, then add the mixed solution composed of absolute ethanol and deionized water dropwise, and stir at 700r / min for 2h, Then add it to the modified silica sol, stir for 3 hours at a rotating speed of 150r / min, and let it stand for 40 hours to obtain a composite sol;

[0026]3) Pour the composite sol into a high-pressure spray gun, s...

Embodiment 2

[0036] An environmentally friendly and degradable heat-insulating food packaging bag, the specific preparation method is as follows:

[0037] 1) Mix ethyl orthosilicate, absolute ethanol, deionized water and concentrated hydrochloric acid according to a certain ratio of substances, stir at a high speed of 900r / min for 1.5h, then add trimethylchlorosilane and dichlorosilane Dibutyltin lauricate was stirred and reacted at a speed of 180r / min for 2.5h at 35°C, and then left to stand for 45h to obtain a modified silica sol;

[0038] 2) Mix butyl titanate, triethanolamine and absolute ethanol according to a certain ratio of substances and stir evenly, then add the mixed solution composed of absolute ethanol and deionized water dropwise, and stir at 800r / min for 1.5h , then added to the modified silica sol, stirred for 2.5 hours at a rotational speed of 200r / min, and left to stand for 42 hours to obtain a composite sol;

[0039] 3) Pour the composite sol into a high-pressure spray ...

Embodiment 3

[0049] An environmentally friendly and degradable heat-insulating food packaging bag, the specific preparation method is as follows:

[0050] 1) Mix ethyl orthosilicate, absolute ethanol, deionized water and concentrated hydrochloric acid according to a certain ratio of substances, stir at a high speed of 1100r / min for 1h, then add trimethylchlorosilane and February Dibutyltin silicate, under the condition of 40°C, stirred and reacted at a speed of 200r / min for 2h, and then stood still for 50h to obtain a modified silica sol;

[0051] 2) Mix and stir butyl titanate, triethanolamine and absolute ethanol according to a certain ratio of substances evenly, then add the mixed solution composed of absolute ethanol and deionized water dropwise, and stir at 1000r / min for 1h, Then add it to the modified silica sol, stir for 2 hours at a rotating speed of 250r / min, and let it stand for 45 hours to obtain a composite sol;

[0052] 3) Pour the composite sol into a high-pressure spray gun...

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Abstract

The invention discloses an environmentally friendly and degradable heat-insulating food packaging bag. The preparation method is as follows: 1) preparing a modified silica sol; 2) adding the prepared titanium dioxide sol to the modified silica sol to obtain a composite sol ; 3) Spray the composite sol on the surface of the substrate, dry it and carry out cyclic heat treatment, remove the coating after cooling, and obtain a composite powder after crushing and grinding; 4) Add sodium periodate to the sodium alginate solution, and obtain it through light-shielding reaction Modified sodium alginate; 5) Dissolve polyvinyl alcohol and add modified sodium alginate for reaction, the obtained product is added to molten polyethylene together with composite powder, and then citric acid, calcium stearate and talc are added The powder can be processed to obtain the required packaging bag. The food packaging bag has an excellent heat insulation effect, can effectively avoid the softening and deformation of the candy, has good biodegradability, can achieve complete degradation, meets environmental protection requirements, and is easy to popularize and apply.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to an environmentally friendly and degradable heat-insulating food packaging bag. Background technique [0002] The food industry is one of the main pillars of the development of the national economy, and with the rapid development of the food industry, food without added preservatives has become the most popular type in the current food industry. This type of product solves the hidden dangers of food additives that people worry about. However, what follows is the problem of how to effectively preserve food during packaging, transportation and storage. [0003] Food packaging is an important part of food commodities. Food packaging bags are used to protect food and prevent damage from biological, chemical, and physical external factors during the circulation of food from the factory to consumers. It can also have The function of maintaining the stable quality of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/06C08L29/04C08L5/04C08K13/06C08K9/06C08K3/36C08K3/34C08K5/098C08K5/092C08J5/18C08B37/04B65D65/46
CPCC08J5/18C08B37/0084B65D65/466C08J2323/06C08J2429/04C08J2405/04C08J2400/16C08K13/06C08K9/06C08K3/36C08K3/34C08K5/098C08K5/092Y02W90/10Y02A40/90
Inventor 独少培
Owner 安徽天路新材料股份有限公司
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