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Soft high-temperature-resistant polypropylene foam material and preparation method thereof

A technology of foaming material and polypropylene, which is applied in the field of soft high-temperature-resistant polypropylene foaming material and its preparation, and can solve problems such as poor mechanical strength, few nucleation sites, and poor microporous structure

Pending Publication Date: 2020-07-07
HUBEI XIANGYUAN NEW MATERIAL TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the disadvantages of PP itself, such as low melt strength, few nucleation sites, and narrow suitable foaming temperature range, make the foaming PP process difficult, poor microporous structure, poor mechanical strength and other outstanding problems, which greatly limit Its application in composite materials and engineering fields

Method used

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  • Soft high-temperature-resistant polypropylene foam material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Polypropylene foam sheet 1 component and weight ratio:

[0031] Copolymer polypropylene 100 copies Polyolefin Block Copolymer Resin 15 copies High-density polyethylene 10 copies Foaming agent 2 copies low molecular weight polytetrafluoroethylene 2 copies

[0032] The melt index MI of the copolymerized polypropylene resin is 5g / 10min, the test condition (190°C / 2.16KG), the softening temperature is 180°C, the melt index MI of the polyolefin block copolymer resin is 1g / 10min, and the soft segment content is 30%. The blowing agent is azodicarbonamide (AC), the particle size is 15nm, the gas generation capacity of the blowing agent is 280ml / g, the low molecular weight polytetrafluoroethylene is 2 parts, and the particle size is 2μm.

[0033] The preparation method of polypropylene foam sheet 1:

[0034] 1) take by weighing polypropylene resin, polyolefin block copolymer resin, high-density polyethylene resin, blowing agent and low ...

Embodiment 2

[0039] Polypropylene foam sheet 2 components and weight ratio:

[0040] Copolymer polypropylene 100 copies Polyolefin Block Copolymer Resin 14 copies High-density polyethylene 9 servings Foaming agent 2 copies low molecular weight polytetrafluoroethylene 1.5 servings

[0041] The melt index MI of the copolymerized polypropylene resin is 1.5g / 10min, the test condition (190°C / 2.16KG), the softening temperature is 140°C, the melt index MI of the polyolefin block copolymer resin is 1.2g / 10min, and the soft segment content is 22 %, the blowing agent is azodicarbonamide (AC), the particle size is 10nm, the gas generation amount of the blowing agent is 240ml / g, and the particle size of low molecular weight polytetrafluoroethylene particles is 3 μm.

[0042] The preparation method of polypropylene foam sheet 2:

[0043]1) take by weighing polypropylene resin, polyolefin block copolymer resin, high-density polyethylene resin, blowing agent an...

Embodiment 3

[0048] 3 components and weight ratio of polypropylene foam sheet:

[0049] Copolymer polypropylene 100 copies Polyolefin Block Copolymer Resin 12 copies High-density polyethylene 8 servings Foaming agent 1 copy low molecular weight polytetrafluoroethylene 3 copies

[0050] Copolymer polypropylene resin melt index MI is 3g / 10min, test conditions (190°C / 2.16KG), softening temperature is 130°C, polyolefin block copolymer resin melt index MI is 1.5g / 10min, soft segment content is 10% , the blowing agent is azodicarbonamide (AC), the particle size is 4nm, the gas generation capacity of the blowing agent is 220ml / g, and the particle size of low molecular weight polytetrafluoroethylene particles is 4μm.

[0051] The preparation method of polypropylene foam sheet 3:

[0052] 1) take by weighing polypropylene resin, polyolefin block copolymer resin, high-density polyethylene resin, blowing agent and low molecular weight polytetrafluoroethylen...

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Abstract

The invention discloses a soft high-temperature-resistant polypropylene foam material and a preparation method thereof. The soft high-temperature-resistant polypropylene foam material comprises 100 parts of co-polypropylene resin, 10-20 parts of polyolefin block copolymer resin, 5-15 parts of high-density polyethylene resin, 1-3 parts of low-molecular-weight polytetrafluoroethylene and 1-4 parts of a foaming agent. The method comprises the following steps of: melting and mixing copolymerized polypropylene resin, polyolefin block copolymer resin, high-density polyethylene resin, a foaming agentand low-molecular-weight polytetrafluoroethylene, and extruding from an extruder to obtain a sheet; and sequentially feeding the cross-linked sheet into a preheating section, a foaming section and acooling shaping section of equipment for foaming to obtain the foam material. The soft high-temperature-resistant polypropylene foam material is low in compression set and low in compression strength,so that the foam material is soft enough; meanwhile, under the high-temperature condition, the heat-resistant dimension change rate (transverse / longitudinal) reaches -0.8% / -1.4%, and the foam material has both softness and heat resistance.

Description

technical field [0001] The invention relates to a polypropylene foam material, in particular to a soft high-temperature-resistant polypropylene foam material and a preparation method thereof. Background technique [0002] Due to the existence of a side methyl group on the polypropylene (PP) molecule, its chemical structure determines that the degradation performance of PP is better, and the higher heat resistance of PP foam materials also makes it more suitable for application than other foam materials. Competitiveness. However, the disadvantages of PP itself, such as low melt strength, few nucleation sites, and narrow suitable foaming temperature range, make the foaming PP process difficult, poor microporous structure, poor mechanical strength and other outstanding problems, which greatly limit Its application in composite materials and engineering fields. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies of the prio...

Claims

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Application Information

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IPC IPC(8): C08L23/14C08L53/00C08L23/06C08L27/18C08J9/10C08J3/28C08J3/24
CPCC08J9/103C08J3/28C08J3/246C08J2205/044C08J2203/04C08J2205/06C08J2323/14C08J2453/00C08J2423/06C08J2427/18
Inventor 魏琼魏志祥
Owner HUBEI XIANGYUAN NEW MATERIAL TECH INC
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