Preparation method of black gray expandable polystyrene

An expandable polystyrene, gray technology, applied in the fields of structural parts and handicraft helmet applications, packaging and building materials, can solve the problems of cumbersome manufacturing process, high manufacturing cost, toxic dyes, etc. Production cost and the effect of improving production efficiency

Active Publication Date: 2012-07-11
天津新龙桥工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The first method above has a lot of environmental pollution, and the dyes are mostly toxic, which is not conducive to the environment and human health.
The second way is that the manufacturing process is cumbersome, the process flow is long, and the manufacturing cost is high.
The third way, due to the high price of this kind of dye, and the dyeing is not uniform enough when foaming, so the application is limited

Method used

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  • Preparation method of black gray expandable polystyrene
  • Preparation method of black gray expandable polystyrene
  • Preparation method of black gray expandable polystyrene

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Adopt 50Kg average particle diameter in the ordinary grade expandable polystyrene resin of 0.7mm, add binder (the weight of binder is 0.05% of expandable polystyrene weight), mix 5 minutes on high-speed mixer , the mixing speed is 500RPM, then add half of the powder, blend and modify for 40 minutes, then add half of the powder (the weight of the powder is 1% of the expandable polystyrene weight), blend and modify for 50 minutes, then discharge material, clean up the mixer, and obtain black-gray expandable polystyrene EPS resin after blending and modification, and then pre-foam and mold the EPS to obtain black-gray ordinary EPS foam products. The product can meet the requirements of black and gray color, and has little effect on the physical strength of the product, and the foam surface has good antistatic function. Surface impedance at 10 8-9 , has excellent anti-static performance, and can be used in high-end anti-static electronic packaging products. The performance...

Embodiment 2

[0037] Adopt 50Kg average particle diameter in the flame-retardant grade expandable polystyrene resin of 0.7mm, add binder (the weight of binder is 1.0% of expandable polystyrene weight), mix on high-speed mixer 5 Minutes, mixing speed is 800RPM, then add 1 / 3rd powder, blend modification 40 minutes, then add 1 / 3 powder, blend modification 40 minutes, finally add remaining 1 / 3rd powder ( The weight of the powder is 3% of the expandable polystyrene weight), blending and modifying for 40 minutes, and the total time is 130 minutes, then discharge, clean up the mixer, and obtain the black gray flame retardant after the blending modification. Type expandable polystyrene EPS resin, and then the EPS is pre-foamed and molded to obtain a black-gray flame-retardant grade EPS foam product, which can meet the requirements of black-gray color, and the foam product The flame retardant performance is increased by 10-20%, the thermal conductivity is reduced by 5-10%, the physical strength is s...

Embodiment 3

[0040] Adopt 50Kg average particle diameter in the flame-retardant grade expandable polystyrene resin of 1.1mm, add binder (the weight of binder is 2.0% of expandable polystyrene weight), mix 10 on high-speed mixer Minutes, mixing speed is 1000RPM, then add 1 / 3rd powder, blending modification 30 minutes, then add 1 / 3rd powder, blending modification 30 minutes, finally add remaining 1 / 3rd powder ( The weight of the powder is 20% of the expandable polystyrene weight), blending and modifying for 30 minutes, and the total time is 100 minutes, then discharge, clean up the mixer, and obtain the black-gray flame-retardant compound after blending and modifying. Type expandable polystyrene EPS resin, and then the EPS is pre-foamed and molded to obtain a black-gray flame-retardant grade EPS foam product, which can meet the requirements of black-gray color, and the foam product The flame retardant performance is increased by 10-20%, the thermal conductivity is reduced by 5-10%, the physi...

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Abstract

The invention relates to a preparation method of black gray expandable polystyrene. The method comprises the following steps of: adding a binding agent into expandable polystyrene, and mixing to obtain expandable polystyrene particles; and then adding powder into the expandable polystyrene particles, and performing blending modification treatment to obtain the black gray expandable polystyrene. Through the preparation method provided by the invention, the technological flow is greatly shortened, the production cost is reduced, the production efficiency is increased, and the related physical properties of the product are improved.

Description

technical field [0001] The invention relates to a preparation method of black-gray expandable polystyrene, which belongs to the application field of packaging and building materials, structural parts and handicraft helmets. Background technique [0002] Expandable polystyrene, also known as expanded polystyrene, English name Expandable Polystyrene, referred to as EPS, is the third largest variety of polystyrene resin. Expandable polystyrene (EPS) is used to make polystyrene foam, commonly known as "styrofoam" or "Styrofoam". Because EPS has excellent functions of heat preservation, heat insulation and shock resistance, it has been widely used in packaging, In terms of building materials, agricultural, forestry and fishing gear, handicrafts, helmets, etc., the current consumption of EPS in China has reached more than 4 million tons. [0003] When EPS is used in packaging and building materials, many users put forward black-gray requirements for the color of EPS foam products...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/236C08L25/06
Inventor 曾首元
Owner 天津新龙桥工程塑料有限公司
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