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Method for manufacturing polystyrene torsion film

A polystyrene, manufacturing method technology, applied in the direction of chemical instruments and methods, flat products, applications, etc., can solve the difficulty in mastering the production process of polystyrene twisted film, the production method of polystyrene twisted film has not been reported, and cannot be twisted Conjunctiva and other problems, to achieve the effect of good aluminum plating, good gloss and transparency, strong kink

Inactive Publication Date: 2008-01-02
GUANGDONG HUAYE PACKING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, because the production process of polystyrene twisted film is difficult to master, the production method of polystyrene twisted film has not been reported so far
Polystyrene heat-shrinkable film for packaging is a well-known product, but it cannot be used as a twist film due to excessive resilience

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Materials used:

[0021] High-impact polystyrene: transparent, melt index 1.5g / 10min, Vicat softening point 105°C, blended composition of 92% polystyrene and 8% butadiene rubber by weight;

[0022] Toughener: Holland Philips KR-03 type K resin, transparent, formed by copolymerization of 75% styrene and 25% butadiene, with an average molecular weight of about 1.8×10 5 The product;

[0023] Antistatic agent: AMS-576 produced by China Shantou Diweisi Company;

[0024] Lubricant: The model produced by American Exxon Company is CASS112 product.

[0025] The above materials are prepared by weight ratio. Middle layer material: 92% high impact polystyrene, 5% toughening agent, 3% antistatic agent; surface layer material: 94.5% high impact polystyrene, 5% toughening agent, 0.5% lubricant.

[0026] After the materials of each layer are evenly mixed, they pass through the metal separator to separate the metal shavings or particles entrained in the materials, and then send them...

Embodiment 2

[0033] Materials used:

[0034] Modified polystyrene: transparent, melt index 2.5g / 10min, Vicat softening point 105°C, copolymer of 70% styrene, 20% butadiene and 10% acrylonitrile by weight;

[0035] Recycled material: the stretched product is trimmed to obtain the remaining scraps after the finished product, which is crushed, melted, filtered, and granulated to make clean PS particles;

[0036] Toughening agent, antiblocking agent, antistatic agent, lubricant are identical with embodiment 1.

[0037]The above materials are prepared according to the weight ratio of the middle layer material: 75% modified polystyrene, 8% toughening agent, 15% recycled material, 2% antistatic agent; surface layer material: 91.5% modified polystyrene, 8% toughening agent Toughener, 0.5% lubricant.

[0038] Processing step is identical with embodiment 1, stretching condition:

[0039] The temperature of the cooling roll after extrusion from the T-shaped die head is 70°C;

[0040] The temperat...

Embodiment 3

[0044] Materials used:

[0045] High-impact polystyrene: transparent, melt index 2.5g / 10min, Vicat softening point 105°C, copolymer of 90% styrene and 10% butadiene by weight, degree of polymerization 1500.

[0046] Recycled material, toughening agent, antiblocking agent, antistatic agent, lubricant are identical with embodiment 2.

[0047] The above materials are prepared according to the weight ratio of the middle layer material: 75.5% high-impact polystyrene, 8% toughening agent, 10% recycled material, 4% antistatic agent, 0.5% lubricant.

[0048] A single-layer membrane is formed by plasticizing and melting extrusion of a twin-screw extruder, and other processing steps are the same as in Example 1, and the stretching conditions are:

[0049] The temperature of the cooling roll after extrusion from the T-shaped die head is 70°C;

[0050] The temperature of the preheating roll for longitudinal stretching is 135°C, the stretching ratio is 1:2.0, and the cooling and setting ...

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Abstract

The invention discloses a producing method for no-rebound polystyrene torsion film used for food package. Polystyrene resin, high impact polystyrene resin or modified polystyrene resin is mixed with toughening agent and so on in plasticization. The mixture is melted and extruded out to form single-layer or multiple-layer film. The film is drawn in horizontal and vertical direction to become finished product. The torsion film is provided with better mechanical characteristic, high intensity, big rigidity, no rebound elasticity. The torsion film is a better torsion film and can take the place of PVC torsion film, glass paper or PET torsion film as packaging material.

Description

technical field [0001] The invention relates to a manufacturing method of a packaging material, in particular to a manufacturing method of a non-resilience polystyrene twist film used for food packaging. Background technique [0002] At present, the twist film used in food packaging is PVC twist film, cellophane and PET twist film. PVC conjunctival film has good chemical stability and is not easy to be corroded by acid and alkali, but it is unstable to light and heat, and it is easy to release hydrogen chloride and precipitate plasticizer under the action of light and heat, especially ultraviolet rays, which will pollute the packaged objects; in addition, PVC material It is difficult to recycle, and incineration cannot be converted into a usable heat source. It pollutes soil and groundwater when it is disposed of as a landfill, and incineration produces dioxin carcinogens, which have adverse effects on the human body and the environment. Therefore, the use of PVC film is wid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/00B29C55/18B29C55/14B29D7/01B29K25/00B29K409/00B29L7/00
CPCC08L25/06B29K2995/0089C08L25/12C08J5/18C08J2325/06B32B27/08B29C55/143C08L55/02B29K2025/00B32B2272/00B32B27/32
Inventor 杨扬洪之全苏阳陈文娜
Owner GUANGDONG HUAYE PACKING MATERIAL
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