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Polypropylene structure foamed material with favorable appearance and preparation method thereof

A foaming material and polypropylene technology, applied in the field of polypropylene structural foaming material and its preparation, can solve the problems of surface breakage, large equipment cost, potential safety hazards in high-pressure gas, etc. The effect of improving high temperature strength and good appearance

Inactive Publication Date: 2015-06-24
SHANGHAI KINGFA SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has two disadvantages: on the one hand, the investment in equipment is large, and on the other hand, the existence of high-pressure gas is prone to safety hazards
[0004] In addition, for filled modified polypropylene structural foam materials, it is often easy to have poor appearance phenomena such as surface holes

Method used

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  • Polypropylene structure foamed material with favorable appearance and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Premixing of some raw materials: first, 58 parts of homopolypropylene resin, 10 parts of copolymerized polypropylene resin; 7 parts of toughening agent, 15 parts of filler, 0.1 part of crystal nucleating agent, 0.2 part of 1010 antioxidant, 168 0.2 parts of antioxidant, stir evenly in a high-speed mixer;

[0040] (2) Preparation of polypropylene modified material for foaming: Add the mixed material pellets from the main feeding port of the twin-screw extruder, add 8 parts of glass fibers from the side feeding port, and perform melt blending and extrusion Granulating to obtain a polypropylene modified material for foaming;

[0041] (3) Injection foaming: Mix 1.5 parts of foaming agent masterbatch and 98.5 parts of polypropylene modified material for foaming obtained in step (2) in a high-speed mixer; then put them into an injection molding machine for injection foaming , to obtain structural foamed polypropylene material, the performance test results are shown in Ta...

Embodiment 2

[0043] (1) Premixing of some raw materials: first, 39.2 parts of homopolypropylene resin, 28 parts of copolymerized polypropylene resin; 5 parts of toughening agent, 20 parts of filler, 0.2 part of crystal nucleating agent, 0.3 part of 1010 antioxidant, 168 0.3 parts of antioxidant, stirred evenly in a high-speed mixer;

[0044] (2) Preparation of polypropylene modified material for foaming: add the mixed material pellets from the main feed port of the twin-screw extruder, add 5 parts of glass fiber from the side feed port, and perform melt blending and extrusion Granulating to obtain a polypropylene modified material for foaming;

[0045] (3) Injection foaming: Mix 2 parts of foaming agent masterbatch and 98 parts of polypropylene modified material for foaming obtained in step (2) in a high-speed mixer; then put them into an injection molding machine for injection foaming , to obtain structural foamed polypropylene material, the performance test results are shown in Table 1....

Embodiment 3

[0047] (1) Premixing of some raw materials: first, 40 parts of homopolypropylene resin, 40 parts of copolymerized polypropylene resin; 3 parts of toughening agent, 10 parts of filler, 0.2 part of crystal nucleating agent, 0.3 part of 1010 antioxidant, 168 0.3 parts of antioxidant, stirred evenly in a high-speed mixer;

[0048] (2) Preparation of polypropylene modified material for foaming: add the mixed material pellets from the main feed port of the twin-screw extruder, add 5 parts of glass fiber from the side feed port, and perform melt blending and extrusion Granulating to obtain a polypropylene modified material for foaming;

[0049] (3) Injection foaming: Mix 1.2 parts of foaming agent masterbatch and 98.8 parts of polypropylene modified material for foaming obtained in step (2) in a high-speed mixer; then put them into an injection molding machine for injection foaming , to obtain structural foamed polypropylene material, the performance test results are shown in Table ...

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Abstract

The invention discloses a polypropylene structure foamed material with favorable appearance and a preparation method thereof. The material mainly comprises the following raw materials in parts by weight: 30-70 parts of homopolymer polypropylene resin, 10-50 parts of copolymer polypropylene resin, 0-10 parts of toughener, 0-30 parts of filler, 0-8 parts of glass fiber, 0.05-0.5 part of crystallization nucleating agent, 0.5-5 parts of foaming agent master batch and 0.1-3 parts of antioxidant. The invention also discloses a preparation method of the foamed polypropylene material in such structure. The material has higher flowability, higher crystallization rate, higher melt strength and lower exposed-perforation ratio; the crystallization nucleating agent is added to enhance the crystallinity and crystallization rate of the material, so that the plastic surface can be cured at higher temperature, thereby preventing the pores from shifting to the surface; and the glass fiber is added to enhance the high-temperature strength of the material and prevent the phenomenon of exposed perforation on the surface, so that the prepared structure foamed polypropylene material has the advantages of uniform pores, low density and high strength, and is widely applied in the aspects of weight reduction and sound insulation of automobile parts.

Description

technical field [0001] The invention belongs to the technical field of polymer materials, and relates to a polypropylene structure foaming material with good appearance and a preparation method thereof. Background technique [0002] Polypropylene material is the second largest general-purpose plastic in the world. In the modified plastic industry, its variety is the most abundant, and it involves a wide range of application fields. Due to the characteristics of wide sources, cheap price, low density and excellent processing and molding, polypropylene modified materials have been widely used in the automotive industry, replacing many parts that were originally molded with ABS or PA. With the acceleration of the lightweight of automobiles, OEMs have also put forward requirements for lightweight polypropylene materials. Structural foaming provides a feasible solution for the lightweight of polypropylene modified materials. [0003] At present, the preparation of polypropylene...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L23/08C08K13/04C08K7/14C08K3/34C08K3/26C08K5/098C08K5/521C08K5/134C08K5/526C08J9/12C08J9/06B29C47/92B29C48/92
CPCC08L23/12B29C45/77B29C45/78B29C48/92B29C2948/9258B29C2948/92704C08J9/103C08J9/105C08J9/107C08J9/141C08J2203/04C08J2203/182C08J2203/184C08J2203/20C08J2323/12C08J2323/14C08K2201/014C08L23/14C08L2203/14C08L2205/03C08L2205/24C08L23/0815C08K13/04C08K7/14C08K3/34C08K2003/265C08K5/098C08K5/1345C08K5/526
Inventor 陈桂吉陈延安周英辉李志平
Owner SHANGHAI KINGFA SCI & TECH
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