Food-grade TPE material and preparation technology thereof

A food-grade, raw material technology, applied in the field of TPE materials, can solve problems such as toxic and side effects, and achieve stable performance, consistent physical properties, and less frictional heat

Inactive Publication Date: 2016-06-29
SHENZHEN XUANLI PLASTIC SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Studies have shown that DEHP used for plasticizing vinyl chloride resin has toxic and side effects on various organs of humans and animals. What is even more worrying is that DEHP hydrolysis will generate monoethylhexyl phthalate (MEHP), which has far more toxic and side effects. Much higher than DEHP
[0005] In 2001, DEHP plasticized polyvinyl chloride was listed as a carcinogenic substance by the International Cancer Research Center; it is a trend to use TPE materials instead of PVC materials to make related food packaging, but for some parts that require high hardness and shape , the mechanical properties and processing properties of existing TPE materials need to be improved, and the safety performance of food-grade materials also needs to be improved, so as to increase market popularity

Method used

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  • Food-grade TPE material and preparation technology thereof
  • Food-grade TPE material and preparation technology thereof
  • Food-grade TPE material and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The food-grade TPE material is characterized in that it contains the following raw materials in weight ratio:

[0033]

[0034] The polyquaternium salt-chitosan-hyperbranched polyurethane composite is obtained by first modifying chitosan with polyquaternium salt, and then modifying the hyperbranched polyurethane with the obtained modified chitosan.

[0035] Its preparation method is:

[0036] (1) Ingredients; configure the raw materials according to the formula of the above-mentioned food-grade TPE material; use a low-speed horizontal mixing tank to mix evenly at low speed; (2) Extrude; send the mixture obtained in step (1) into the twin-screw extruder in turn and single-screw extruder, extruding; (3) pelletizing; the material extruded in step (2) is sent to pelletizing machine for pelletizing; (4) cooling; after step (3) pelletizing is completed cooling the material; (5) dehydrating; sending the cooled material in step (4) to a centrifugal dehydrator for dehydratio...

Embodiment 2

[0039] The food-grade TPE material is characterized in that it contains the following raw materials in weight ratio:

[0040]

[0041]

[0042] The polyquaternium salt-chitosan-hyperbranched polyurethane composite is obtained by first modifying chitosan with polyquaternium salt, and then modifying the hyperbranched polyurethane with the obtained modified chitosan.

[0043] Its preparation method is:

[0044](1) Ingredients; configure the raw materials according to the formula of the above-mentioned food-grade TPE material; use a low-speed horizontal mixing tank to mix evenly at low speed; (2) Extrude; send the mixture obtained in step (1) into the twin-screw extruder in turn and single-screw extruder, extruding; (3) pelletizing; the material extruded in step (2) is sent to pelletizing machine for pelletizing; (4) cooling; after step (3) pelletizing is completed cooling the material; (5) dehydrating; sending the cooled material in step (4) to a centrifugal dehydrator for...

Embodiment 3

[0047] The food-grade TPE material is characterized in that it contains the following raw materials in weight ratio:

[0048]

[0049] The polyquaternium salt-chitosan-hyperbranched polyurethane compound is obtained by first modifying chitosan with polyquaternium salt, and then modifying the hyperbranched polyurethane with the obtained modified chitosan.

[0050] Its preparation method is:

[0051] (1) Ingredients; configure the raw materials according to the formula of the above-mentioned food-grade TPE material; use a low-speed horizontal mixing tank to mix evenly at low speed; (2) Extrude; send the mixture obtained in step (1) into the twin-screw extruder in turn and single-screw extruder, extruding; (3) pelletizing; the material extruded in step (2) is sent to pelletizing machine for pelletizing; (4) cooling; after step (3) pelletizing is completed cooling the material; (5) dehydrating; sending the cooled material in step (4) to a centrifugal dehydrator for dehydration...

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Abstract

The invention discloses a food-grade TPE material and a preparation technology thereof. A food-grade material product prepared from a TPE material can replace a PVC material and has food-grade safety reliability, good mechanical properties and processing performance. The food-grade TPE material is prepared from, by weight, 60-80 parts of styrene elastomer, 20-40 parts of polypropylene resin, 30-50 parts of white oil, 5-20 parts of a polyquaternium-chitosan-hyperbranched polyurethane compound, 5-15 parts of sulfonated polybenzimidazole, 2-10 parts of 2,2'-bis(4-carboxyl phenoxy) benzidine, 0.5-1 part of a smoothing agent and 0.1-1 part of antioxidant. Chitosan is modified with polyquaternium, and then hyperbranched polyurethane is modified with the modified chitosan to obtain the polyquaternium-chitosan-hyperbranched polyurethane compound.

Description

technical field [0001] The invention belongs to the field of TPE materials, in particular, the invention relates to a food-grade TPE material. Background technique [0002] At present, some packaging in the food industry is still using PVC materials, or some small parts use PVC materials; PVC (polyvinyl chloride) materials and their additives DEHP are harmful to human health and the environment. [0003] In 1987, vinyl chloride was identified as a human carcinogen by the International Agency for Research on Cancer. No matter when polyvinyl chloride resin is synthesized or processed, more or less vinyl chloride will always be produced. Studies have found that long-term exposure to vinyl chloride monomer can cause symptoms such as neurasthenia, chloracne, and Raynaud's disease, collectively referred to as vinyl chloride disease. [0004] Studies have shown that DEHP used for plasticizing vinyl chloride resin has toxic and side effects on various organs of humans and animals....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L23/14C08L91/06C08L5/08C08L75/04C08K13/02C08K3/36C08K5/103C08K5/18B29C47/92B29C48/92
CPCC08L53/025B29C48/92B29C2948/92704C08K2201/006C08K2201/011C08L91/06C08L2201/08C08L2205/035C08L2207/04C08L53/02C08L23/14C08L5/08C08L75/04C08K13/02C08K3/36C08K5/103C08K5/18
Inventor 谢艳红
Owner SHENZHEN XUANLI PLASTIC SCI & TECH
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