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Environment-protective SEBS fresh-preservation film and producing method thereof

A production method and technology of fresh-keeping film, applied in environment-friendly SEBS fresh-keeping film and its production field, can solve problems such as slow degradation, non-biodegradable PVC, and human health hazards, and achieve simple production process, excellent mechanical properties, and excellent transparency Effect

Inactive Publication Date: 2007-11-14
SHENZHEN POLYTECHNIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. The problem of monomers, polyvinyl chloride inevitably has residual vinyl chloride monomer (VCM) during polymerization, and excessive concentrations will cause serious harm to the human body (damage to the nervous system, liver and embryos);
[0006] 2. The problem of additives. During the production of polyvinyl chloride cling film, various additives (stabilizers, plasticizers, etc.) need to be added. They are exposed to oily food for a long time, especially when the temperature is high in summer, it is easy to migrate and precipitate from the cling film. , infiltrate and remain in food, causing harm to human health;
[0007] 3. Environmental protection issues. PVC itself cannot be biodegraded. Under the action of light / heat, the degradation is also very slow. If it is incinerated, it will produce a large amount of irritating and corrosive gases. When the combustion is not complete, it will also produce dioxins and other serious problems. carcinogen

Method used

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  • Environment-protective SEBS fresh-preservation film and producing method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0042] First weigh 100 parts by mass of high molecular weight SEBS resin, 75 parts by mass of naphthenic rubber filler oil, 40 parts by mass of copolymerized polypropylene, 0.20 parts by mass of ethylene bisstearamide, 0.20 parts by mass of zinc stearate, polyethylene wax 0.20 parts by mass, 0.2 parts by mass of tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol, 0.20 parts by mass of tris(2,4-di-tert-butylphenyl)phosphite share;

[0043] Then, let the SEBS resin fully absorb the rubber filling oil;

[0044] Next, add the SEBS resin that has absorbed the rubber filling oil and other raw materials into the mixer and mix evenly, then use a twin-screw extruder to granulate. ℃, 185℃, 185℃, 185℃, 185℃, head temperature 185℃;

[0045] Finally, use a plastic extrusion blown film machine to extrude the blown film and pack it in rolls. The temperature of the main part of the film extruder starts from the feeding port, and it is 160°C, 170°C, 180°C, 180°C, 18...

example 2

[0047] First weigh 100 parts by mass of low molecular weight SEBS resin, 75 parts by mass of naphthenic rubber filler oil, 25 parts by mass of paraffin-based rubber filler oil, 85 parts by mass of homopolypropylene, 0.30 parts by mass of ethylene bisoleic acid amide, hard 0.20 parts by mass of calcium fatty acid, 0.20 parts by mass of polyethylene wax, 0.20 parts by mass of octadecyl propionate, 0.20 parts by mass of beta (3', 5'-di-tert-butyl-4'-hydroxyphenyl) propionate, tris(2,4 -di-tert-butylphenylcarboxylate) 0.15 parts by mass;

[0048] Then, let the SEBS resin fully absorb the rubber filling oil;

[0049] Next, add the SEBS resin that has absorbed the rubber filling oil and other raw materials into the mixer and mix evenly, then granulate with a twin-screw extruder. ℃, 190℃, 190℃, 190℃, 190℃, head temperature 185℃;

[0050] Finally, use a plastic extrusion blown film machine to extrude the blown film and pack it in rolls. The temperature of the main body of the film e...

example 3

[0052] First weigh 50 parts by mass of high molecular weight SEBS resin, 50 parts by mass of low molecular weight SEBS resin, 100 parts by mass of paraffin-based rubber filler oil, 45 parts by mass of copolymerized polypropylene, 45 parts by mass of homopolymerized polypropylene, ethylene dioleic acid 0.30 parts by mass of amides, 0.20 parts by mass of calcium stearate, 0.20 parts by mass of polyethylene wax, 0.1 parts by mass of silicone resin, tetrakis[3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol 0.30 parts by mass, 0.10 parts by mass of tris(2,4-di-tert-butylphenyl)phosphite, 0.05 parts by mass of dilauryl thiodipropionate;

[0053] Then, let SEBS completely absorb the rubber filling oil;

[0054] Next, add the SEBS resin that has absorbed the rubber filling oil and other raw materials into the mixer and mix evenly, then use a twin-screw extruder to granulate. ℃, 185℃, 190℃, 190℃, 190℃, head temperature 185℃;

[0055] Finally, use a plastic extrusion ...

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PUM

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Abstract

The present invention discloses a kind of environmental friendly SEBS fresh-keeping film, and includes the following components with contents of unit mass: SEBS resin 100 units, rubber filling oil 75-125 units, polypropylene 40-115 units, lubricant 0.6-0.8 units, and anti-aging agent 0.4-0.6 units. The present invention also offers a production method of environmental friendly SEBS fresh-keeping film, which includes the following steps: weighting and taking the various components according to their dosages: SEBS resin 100 units, rubber filling oil 75-125 units, polypropylene 40-115 units, lubricant 0.6-0.8 units, and anti-aging agent 0.4-0.6 units; letting SEBS resin to fully absorb rubber filling oil; being even mixed with polypropylene, lubricant, and anti-aging agent, using twin screw extruder to produce particles; finally, using plastic-extruded blower to extrude the shaped fresh-keeping film. The environmental friendly SEBS fresh-keeping film of the present invention has excellent transparence, tackiness, and good mechanical properties, and is health, safe and environmental friendly, which can replace soft PVC fresh-keeping film for foods and packings of other daily-used goods and industrial products.

Description

technical field [0001] The invention relates to an environment-friendly plastic wrap and a production method thereof, in particular to an environment-friendly SEBS plastic wrap and a production method thereof. Background technique [0002] At present, commercially available plastic wrap can be divided into three categories according to different raw materials: the first category is polyvinylidene chloride (PVDC), which is mainly used for the packaging of cooked food, ham sausage and other long-term and large-scale industrial products; It is polyethylene (PE), which is mainly used for the packaging of ordinary fruits, vegetables, etc.; the third category is polyvinyl chloride (PVC) that people use more. Among them, polyethylene and polyvinyl chloride cling film are widely used in daily life. From vegetables, fruits to temporary fresh-keeping of household food, and to prevent food from smelling when stored, cling film must be used. The self-adhesiveness of the plastic wrap ma...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L53/02C08L23/12C08K5/524B29C47/40B29C47/92C08K5/20C08K5/09B29C48/40B29C48/92B29C48/95
CPCB29C47/92B29C48/92B29C2948/92704B29C48/08B29C48/40B29C48/9185B29C2948/92895B29C2948/92904B29C48/95
Inventor 肖望东林峰邱廷模
Owner SHENZHEN POLYTECHNIC
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