Thermostable polystyrene packing composition and preparing method

A molding method, yogurt technology, applied in packaging, wrapping paper, packaged food, etc., to achieve the effect of improving elongation at break and notch impact, improving compatibility, and excellent modification effect

Inactive Publication Date: 2010-06-23
SICHUAN KINGFA TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is no report on the application of PS / PP alloy in yogurt packaging

Method used

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  • Thermostable polystyrene packing composition and preparing method
  • Thermostable polystyrene packing composition and preparing method
  • Thermostable polystyrene packing composition and preparing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 20% by weight of HIPS, 40% of GPPS, 15% of PP, 10% of compatibilizer, 10% of inorganic powder (pre-treated with coupling agent), and by their total weight 0.5% antioxidant is first put into a high-speed mixer with a speed of about 1000rpm and mixed for 3 minutes, and then put into a twin-screw extruder. The temperature is controlled at 200℃~215℃, and the screw speed is 450 rpm. It is obtained by extrusion and granulation.

Embodiment 2

[0027] 28% by weight of HIPS, 32% of GPPS, 12.5% ​​of PP, 5% of compatibilizer, 8% of inorganic powder (pre-treated with coupling agent), and 0.5% by weight of their total % antioxidant is first put into a high-speed mixer with a rotation speed of about 1000rpm and mixed for 3 minutes, and then put into a twin-screw extruder, extruded under the conditions of a processing temperature of 200-215°C and a screw speed of 450 rpm. Grains are obtained.

Embodiment 3

[0029] 28% by weight HIPS, 32% GPPS, 20% PP, 5% compatibilizer, 8% inorganic powder (pre-treated with coupling agent), and 0.5% by weight % antioxidant is first put into a high-speed mixer with a rotation speed of about 1000rpm and mixed for 3 minutes, and then put into a twin-screw extruder, extruded under the conditions of a processing temperature of 200-215°C and a screw speed of 450 rpm. Grains are obtained.

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Abstract

The present invention provides a novel material for producing yoghurt cups by extrusion molding, particularly a polystyrene (PS) / polypropylene (PP) alloy material having the advantages of good ductility, high strength, good stiffness, thermostability, large molding processing range and low cost on account of problems existing in the PS yoghurt packaging. The material consists of 40 to 70% by weight of PS, 15 to 85% by weight of PP, 8% by weight of inorganic mineral powder and 6 to 10% by weight of auxiliary. The raw materials are premixed, and extruded and pelletized by a double-screw extruder under common processing conditions, and a basic resin is produced. Then, a product mutually attached is made by taking the material as a middle layer and taking general purpose polystyrene (GPPS) layers as a top layer and a bottom layer by a three-layer co-extrusion molding processing technique, and the product is molded by co-extrusion without adhesive bonding.

Description

technical field [0001] The invention belongs to the technical field of heat-resistant PS packaging, and in particular relates to a PS / PP alloy material and molding which improve the heat resistance of PS. Background technique [0002] Polystyrene (PS) is a thermoplastic resin that is widely used due to its low cost and ease of processing. Polystyrene (PS) is divided into general-purpose polystyrene (GPPS) and high-impact polystyrene HIPS, in which GPPS is a homopolymer of styrene, which has very good rigidity, transparency, surface gloss, coloring, geometric Stability, thermal stability, electrical insulating properties, light and hard, low heat capacity, good fluidity, easy to process and shape, resistant to water and diluted inorganic acids. HIPS is a graft copolymer of styrene and butadiene, containing 6-8% of polybutadiene rubber. Since polybutadiene is an elastomer, its introduction can significantly improve the toughness of GPPS, but the Although the impact strength ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B65D65/40B65D81/24B65D85/80B32B27/08B32B27/20B29C69/02B29B9/00
Inventor 谭头文龙翰杨燕
Owner SICHUAN KINGFA TECH DEV
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