Environment-friendly heat shrinkable film

A heat-shrinkable film, environmentally friendly technology, applied in the field of packaging film, can solve problems such as poor shrinkage, and achieve the effects of improving shrinkage, good shrinkage, and improved dispersibility

Pending Publication Date: 2022-01-11
山东亿隆薄膜材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies of the prior art, the present invention provides an environmentally friendly heat-shrinkable film, which solves the problem of poor shrinkage of traditional polyester heat-shrinkable films and improves the shrinkage of polyester heat-shrinkable films

Method used

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  • Environment-friendly heat shrinkable film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] An environmentally friendly heat shrinkable film, comprising the following raw materials in parts by mass: 50 parts of polyester, 0.5 parts of edible hydrophobic substance, 0.5 parts of emulsifier, 1.5 parts of antioxidant, 1.2 parts of light stabilizer, and 1 part of modified collagen.

[0024] Polyester is composed of lactic acid-co-glycolic acid, polylactic acid and polycaprolactone, wherein the mass ratio of lactic acid-co-glycolic acid, polylactic acid and polycaprolactone is 7:2:1, and the edible hydrophobic substance is Stearic acid, emulsifiers are sucrose fatty acid esters and polyglycerol fatty acid esters.

[0025] In this embodiment, a method for preparing an environmentally friendly heat shrinkable film comprises the following steps:

[0026] (1) Mix the collagen with polyethylene glycol first, stir and react in an oil bath, the reaction temperature is 75°C, and the reaction time is 2 hours. After the reaction is completed, add oxalic acid dropwise, and the...

Embodiment 2

[0030] An environmentally friendly heat shrinkable film, comprising the following raw materials in parts by mass: 60 parts of polyester, 0.6 parts of edible hydrophobic substance, 0.6 parts of emulsifier, 1.6 parts of antioxidant, 1.3 parts of light stabilizer, and 2 parts of modified collagen.

[0031] Polyester is composed of lactic acid-co-glycolic acid, polylactic acid and polycaprolactone, wherein the mass ratio of lactic acid-co-glycolic acid, polylactic acid and polycaprolactone is 7:2:1, and the edible hydrophobic substance is Stearic acid, emulsifiers are sucrose fatty acid esters and polyglycerol fatty acid esters.

[0032] In this embodiment, a method for preparing an environmentally friendly heat shrinkable film comprises the following steps:

[0033] (1) Mix the collagen with polyethylene glycol first, stir and react in an oil bath, the reaction temperature is 75°C, and the reaction time is 2 hours. After the reaction is completed, add oxalic acid dropwise, and th...

Embodiment 3

[0037] An environmentally friendly heat shrinkable film, comprising the following raw materials in parts by mass: 70 parts of polyester, 0.7 parts of edible hydrophobic substance, 0.7 parts of emulsifier, 1.7 parts of antioxidant, 1.4 parts of light stabilizer, and 3 parts of modified collagen.

[0038] Polyester is composed of lactic acid-co-glycolic acid, polylactic acid and polycaprolactone, wherein the mass ratio of lactic acid-co-glycolic acid, polylactic acid and polycaprolactone is 7:2:1, and the edible hydrophobic substance is Stearic acid, emulsifiers are sucrose fatty acid esters and polyglycerol fatty acid esters.

[0039] In this embodiment, a method for preparing an environmentally friendly heat shrinkable film comprises the following steps:

[0040] (1) Mix the collagen with polyethylene glycol first, stir and react in an oil bath, the reaction temperature is 75°C, and the reaction time is 2 hours. After the reaction is completed, add oxalic acid dropwise, and th...

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Abstract

The invention belongs to the technical field of packaging films, and particularly relates to an environment-friendly heat shrinkable film which is characterized by being prepared from the following raw materials in parts by mass: 50-100 parts of polyester, 0.5-1 part of an edible hydrophobic substance, 0.5-1 part of an emulsifier, 1.5-2 parts of an antioxidant, 1.2-1.7 parts of a light stabilizer and 1-6 parts of modified collagen. According to the technical scheme, collagen is grafted with polyethylene glycol, then the collagen and oxalic acid are subjected to esterification reaction, then the collagen and ethylene glycol are subjected to esterification reaction, the prepared modified collagen contains a large number of ester functional groups, the modified collagen can be better compounded with polyester through the ester functional groups in the modified collagen, so that the dispersity of the polyester particles in the modified collagen is improved, so that the polyester heat-shrinkable film has better contractility.

Description

technical field [0001] The invention belongs to the technical field of packaging films, and in particular relates to an environment-friendly heat shrinkable film. Background technique [0002] Polyester heat shrinkable film is a new type of heat shrinkable packaging material. Because it is easy to recycle, non-toxic, tasteless, good mechanical properties, especially in line with environmental protection, polyester has become an ideal substitute for PVC heat shrinkable film in developed countries. However, ordinary polyester is crystalline For high polymers, ordinary films can only get a heat shrinkage rate of less than 30% after special processing. To obtain a polyester film with a higher heat shrinkage rate, it must also be modified. That is to say, in order to prepare polyester films with high thermal shrinkage rate, it is usually necessary to carry out copolymerization or blending modification on conventional polyesters. [0003] Animal collagen will shrink above 60°C,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08L67/04C08L87/00C08K5/09
CPCC08J5/18C08J2367/04C08J2467/04C08J2487/00C08K5/09
Inventor 辛刚丁杰郑志伟马德起
Owner 山东亿隆薄膜材料有限责任公司
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