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Preparation method of colorful EPP (ExpandedPolypropylene) beads

A colorful and bead technology, applied in the field of polyolefin resin expanded particles, can solve the problem of single color of EPP products, and achieve the effect of broadening the application field and free color selection.

Inactive Publication Date: 2018-04-17
WUXI HI TEC ENVIRONMENTAL MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention will solve the problem of single color of EPP products on the market at present, and the present invention provides a preparation method of colorful EPP beads

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A preparation method of colorful EPP beads, comprising the following steps:

[0020] (1) Mix polypropylene resin, stabilizer, foaming nucleating agent and red color masterbatch evenly according to a specific ratio, knead, extrude, draw, pelletize and dry through an extruder, and adjust the extruder to prepare pellets Polypropylene particles with the same diameter and specifications are packaged for later use; 0.1% of the total mass of polypropylene resin is also added with antioxidants and lubricants during mixing, and polypropylene resin is a blend of binary or ternary random copolymerized polypropylene resins thing;

[0021] (2) Mix the prepared polypropylene particles with a certain proportion of water into the foaming reactor, then heat and pressurize, so that the polypropylene particles absorb a large amount of gas under high temperature and high pressure;

[0022] (3) After the treatment in step (2), and the heating temperature is near the melting point of the ma...

Embodiment 2

[0024] A preparation method of colorful EPP beads, comprising the following steps:

[0025] (1) Mix polypropylene resin, stabilizer, foaming nucleating agent and orange masterbatch uniformly according to a specific ratio, knead, extrude, draw, pelletize and dry through an extruder, and adjust the extruder to prepare pellets Polypropylene particles with the same diameter and specifications are packaged for later use; 0.5% of the total mass of polypropylene resin is added with antioxidants and flame retardants during mixing, and polypropylene resin is binary or ternary random copolymerized polypropylene resin blends;

[0026] (2) Mix the prepared polypropylene particles with a certain proportion of water and put them into a foaming reactor, then heat and pressurize, so that the polypropylene particles absorb a large amount of air under high temperature and high pressure;

[0027] (3) After the treatment in step (2), and the heating temperature is near the melting point of the m...

Embodiment 3

[0029] A preparation method of colorful EPP beads, comprising the following steps:

[0030] (1) Mix polypropylene resin, stabilizer, foaming nucleating agent and coniferous green masterbatch uniformly according to a specific ratio, knead, extrude, draw, pelletize and dry through an extruder, and adjust the extruder to prepare pellets Polypropylene particles with the same diameter and specifications are packaged for later use; 3% of the total mass of the polypropylene resin as a coupling agent and an ultraviolet absorber are also added during mixing, and the polypropylene resin is a polypropylene homopolymer and a ternary random copolymer. Blends of acrylic resins;

[0031] (2) Mix the prepared polypropylene particles with a certain proportion of water and put them into a foaming reactor, then heat and pressurize, so that the polypropylene particles absorb a large amount of nitrogen under high temperature and high pressure;

[0032] (3) After the treatment in step (2), and the...

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PUM

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Abstract

The invention discloses a preparation method of colorful EPP (Expanded Polypropylene) beads. The preparation method comprises the steps that (1), polypropylene resin, a stabilizer, a foam nucleator and color master batches with designated colors are mixed to be even according to specific proportions, and the mixture is subjected to mixing, extruding, wire drawing, chopping and drying through an extruding machine; (2), polypropylene particles and water are mixed and put into a foam reaction still, and then heating and pressing are conducted, so that the polypropylene particles absorb a large amount of gas under a situation of high temperature and high pressure; (3) a gas releasing valve of the reaction still is opened to release the pressure to be atmospheric pressure when the temperature is close to a material melting point, at the moment, the polypropylene particles swell, and thus the neededfoam polypropylene beads with the designated colors and different multiplying powers are obtained. The colorful EPP beads are prepared by adopting a physical foaming method, no chemical reaction process is involved, the preparation method is green, environmentally friendly and pollution-free,no harm to human body, the color selection of the products is relatively free, including but not limited to the colors listed in the preparation method, and can be selected freely, the colorful EPP beads are particularly suitable for the field of child toys, and accordingly the application range of the EPP products is widened.

Description

technical field [0001] The invention relates to the field of polyolefin resin foamed particles, in particular to a preparation method of colorful EPP beads. Background technique [0002] Expanded polypropylene (EPP) is a foam with excellent performance. Light weight, high strength, good chemical resistance, high temperature resistance, excellent energy absorption characteristics, and the product is green and environmentally friendly, so EPP is replacing traditional foam materials and EPS foam plastics in more and more fields. It is widely used in civil and aerospace fields such as product packaging and transportation. [0003] However, the traditional application fields do not have high requirements on the color of EPP materials. Some electronic packaging products, automotive tool boxes, household appliance cushions and waterproof foam boards, etc., generally only need traditional color foam materials. For example, black, gray, pink, etc. can basically meet the color requ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/12C08L23/12C08L23/14
Inventor 黄二波杨亮炯周仲波刘缓缓曾佳
Owner WUXI HI TEC ENVIRONMENTAL MATERIAL CO LTD