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A kind of preparation method of lightweight EPP molding foamed double-density board

A double-density, plate technology, applied in the field of EPP plate preparation technology, can solve the problems of high investment and operation costs, strict requirements, etc., and achieve the effects of firm bonding, improved tensile strength, and reasonable process design

Active Publication Date: 2022-03-15
宜兴市泰宇汽车零部件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since this process has relatively strict requirements on equipment and processes, it requires special pipes and containers, and requires safety fire protection equipment with high protection performance.
As a result, its input and operating costs are higher
And the tensile strength, flexural strength and impact strength of the foamed polypropylene prepared by this process have certain limitations.

Method used

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  • A kind of preparation method of lightweight EPP molding foamed double-density board

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: A kind of preparation method of lightweight EPP molding foamed double-density board, specifically comprises:

[0021] Step 1: Preparation of Component I Raw Materials

[0022] According to parts by weight, 135 parts of PP, 53 parts of ethylene-octene copolymer, 36 parts of nano-calcium carbonate, 13 parts of talc, 8 parts of white carbon black, 10 parts of strength additive, 7 parts of antioxidant, 3 parts of nano-kaolin Continue mixing for 1 hour at a temperature of 45°C and a stirring speed of 180r / min, then add it to a granulator for granulation at 220°C, and obtain component I raw materials after water cooling, air drying, and granulation; , the strength aid is maleic anhydride grafted polyethylene; the antioxidant is a mixture of antioxidant 1076, antioxidant 1010, and antioxidant 264 in a mass ratio of 3:1:1;

[0023] Step 2: Preparation of Component II Raw Materials

[0024] Add acrylic acid and ammonium persulfate with a concentration of 15wt% in...

Embodiment 2

[0027] Embodiment 2: A kind of preparation method of lightweight EPP molding foamed double-density board, specifically comprising:

[0028] Step 1: Preparation of Component I Raw Materials

[0029] According to parts by weight, 140 parts of PP, 55 parts of ethylene-octene copolymer, 38 parts of nano-calcium carbonate, 14 parts of talc, 12 parts of white carbon black, 11 parts of strength additive, 9 parts of antioxidant, 4 parts of nano-kaolin Continue mixing for 2 hours at a temperature of 55°C and a stirring speed of 190r / min, then add it to a granulator for granulation at 250°C, and obtain component I raw materials after water cooling, air drying, and granulation; , the strength additive is maleic anhydride grafted polyethylene; the antioxidant is the mixture of antioxidant 1076, antioxidant 1010, and antioxidant 264 according to the mass ratio of 5:2:1;

[0030] Step 2: Preparation of Component II Raw Materials

[0031] Add acrylic acid with a concentration of 20wt% and ...

Embodiment 3

[0034] Embodiment 3: A kind of preparation method of lightweight EPP molding foamed double-density board, specifically comprises:

[0035] Step 1: Preparation of Component I Raw Materials

[0036]According to parts by weight, 150 parts of PP, 58 parts of ethylene-octene copolymer, 40 parts of nano calcium carbonate, 15 parts of talcum powder, 15 parts of white carbon black, 12 parts of strength additive, 10 parts of antioxidant, 5 parts of nano kaolin Continue mixing for 3 hours at a temperature of 65°C and a stirring speed of 200r / min, then add it to a granulator for granulation at 260°C, and obtain component I raw materials through water cooling, air drying, and granulation; , the strength aid is maleic anhydride grafted polyethylene; the antioxidant is the mixture of antioxidant 1076, antioxidant 1010, and antioxidant 264 according to the mass ratio of 7:3:1;

[0037] Step 2: Preparation of Component II Raw Materials

[0038] Add acrylic acid with a concentration of 25wt%...

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Abstract

The invention discloses a method for preparing a lightweight EPP foamed double-density board, which specifically comprises: mixing PP, ethylene-octene copolymer, nano-calcium carbonate, talc powder, white carbon black, strength additives, and antioxidants , nano-kaolin mixed, granulated, water-cooled, air-dried, and granulated to obtain component I raw materials; acrylic acid, ammonium persulfate, ethanol, and cellulose nanofibrils were modified, centrifuged, and washed to obtain component II raw materials; Component raw materials, II component raw materials, and foaming agent are evenly mixed and placed into an injection molding machine to obtain foamed double-density boards; the process design of the present invention is reasonable, and the use of I component raw materials and II component raw materials can realize the structure of composite materials. When forming, a double-density structure is produced, and the bonding between the various raw material components can effectively improve the formed double-density board to have better tensile strength and bending strength properties.

Description

technical field [0001] The invention relates to the technical field of EPP board preparation technology, in particular to a preparation method of lightweight EPP foamed double-density board. Background technique [0002] Polypropylene has many characteristics such as heat resistance, chemical stability and environmental protection, and is widely used in various fields. However, the melt strength of rain-permeable polypropylene is low, and it has the disadvantage of poor foaming process performance, which greatly limits its application. [0003] As a foam plastic with advanced comprehensive properties, expanded polypropylene has the advantages of excellent toughness and high heat resistance, and can be applied to automotive heat insulation materials and cushioning and energy-absorbing parts. [0004] In the prior art, in the preparation method of foamed polypropylene, most of them adopt extrusion foaming method for foaming treatment. However, since this process has relative...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L51/06C08L23/08C08L51/02C08K13/04C08K3/26C08K3/34C08K7/26C08K5/134C08K5/13C08J9/04C08F251/02C08F220/06
CPCC08J9/04C08J9/0061C08J9/009C08J9/0071C08J9/0095C08J9/0066C08J9/0023C08F251/02C08J2323/12C08J2451/06C08J2423/08C08J2451/02C08F220/06
Inventor 王泽云高国明杨明潘建民唐惠明吴敏郑彩彩
Owner 宜兴市泰宇汽车零部件有限公司