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Micro foaming polypropylene material and preparation method thereof

A polypropylene material and micro-foaming technology, applied in the field of micro-foamed polypropylene materials and their preparation, can solve the problem of poor thermoformability and foaming properties of polypropylene materials, easy escape of foaming gas, and inability to mature applications, etc. problems, to achieve good thermoformability, avoid bubble collapse and rupture, and strengthen the effect of rigidity

Inactive Publication Date: 2018-10-23
WUHU CHUANGKE NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Foaming materials have undoubtedly become the first choice for such designs. Foaming polypropylene materials are currently used in door panels and other parts of a few high-end models. However, the existing foaming methods are mainly physical foaming, which requires high equipment and cannot be used. Large-scale promotion of traditional injection molding machines
The chemically foamed polypropylene material cannot be maturely applied due to its own characteristics. The polypropylene material has the following disadvantages: 1. The melt strength is low. Since polypropylene is a crystalline material, when it is above the melting point, the viscosity drops significantly, which cannot be used. Support the foam body; 2. The polypropylene material itself has good air permeability, and the foaming gas is easy to escape
Makes the thermoformability and foaming performance of polypropylene material worse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The slightly foamed polypropylene material in this embodiment is made of the following raw materials in parts by weight: 40 parts of polypropylene, 30 parts of nano-montmorillonite, 10 parts of foam masterbatch, 1 part of antioxidant, 2 parts of toughening agent, lubricating 2 doses;

[0025] Among them, the foaming masterbatch is made of polyethylene as the carrier, and sodium bicarbonate and citric acid co-coat the inside of the polyethylene carrier; polypropylene is homopolypropylene with a melt index of 0.5g / min; the antioxidant is Hindered phenolic antioxidant; lubricant is liquid paraffin; toughening agent is chlorinated polyethylene; the particle size of nano-montmorillonite is 20nm;

[0026] The preparation method of the micro-foamed polypropylene material of the present embodiment comprises the following steps:

[0027] S1. Weighing each raw material according to parts by weight;

[0028] S2. Add polypropylene, nano-montmorillonite, and foam masterbatch to a ...

Embodiment 2

[0031] The slightly foamed polypropylene material in this embodiment is made of the following raw materials in parts by weight: 65 parts of polypropylene, 55 parts of nano-montmorillonite, 18 parts of foam masterbatch, 4 parts of antioxidant, 7 parts of toughening agent, lubricating 5 doses;

[0032] Among them, the foam masterbatch is made of polyethylene as the carrier, and sodium bicarbonate and citric acid co-coat the inside of the polyethylene carrier; polypropylene is a copolymerized polypropylene with a melt index of 50g / min; the antioxidant is phosphate Antioxidant; lubricant is N, N-ethylene bis stearic acid amide; toughening agent is acrylic-butadiene-styrene copolymer, wherein butadiene in acrylic-butadiene-styrene copolymer Content ≥ 60%; the particle size of nano-montmorillonite is 50nm;

[0033] The preparation method of the micro-foamed polypropylene material of the present embodiment comprises the following steps:

[0034] S1. Weighing each raw material accor...

Embodiment 3

[0038] The micro-foamed polypropylene material in this embodiment is made of the following raw materials in parts by weight: 52 parts of polypropylene, 43 parts of nano-montmorillonite, 14 parts of foam masterbatch, 2.5 parts of antioxidant, 4.5 parts of toughening agent, lubricating agent 3.5 parts of agent;

[0039] Among them, the foam masterbatch is made of polyethylene as the carrier, and sodium bicarbonate and citric acid co-coat the inside of the polyethylene carrier; polypropylene is a homopolypropylene with a melt index of 20g / min and a melt index of 30g / min. The min copolymerized polypropylene is mixed according to the mass ratio of 1:1; the antioxidants are hindered phenolic antioxidants, thioester antioxidants, phosphate antioxidants, and phosphite antioxidants according to the mass ratio 1:1:1:1 mixed; the lubricant is liquid paraffin, stearic acid amide, silicone oil, N,N-ethylene bisstearic acid amide mixed according to the mass ratio of 1:1:1:1; The toughening...

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Abstract

The invention provides a micro foaming polypropylene material and a preparation method thereof, and relates to the technical field of a high polymer material. The micro foaming polypropylene materialis prepared from the following raw materials including polypropylene, nanometer montmorillonite, foaming master batch, anti-oxidants, toughening agents and lubricating agents. The micro foaming polypropylene material has the advantages of good heat shaping performance and good foaming performance; the nanometer montmorillonite is added into the raw materials; the material per se is used as a nucleating agent, so that the crystallization time of the polypropylene is greatly shortened; secondly, the nanometer montmorillonite has the fiber enhancing function; the polymer system rigidity can be enhanced; the melt flowability is reduced; in the foaming process, the foam hole supporting effect can be achieved; the melt intensity of polypropylene is improved; the foaming rate of the polypropylenematerial is greatly improved.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a micro-foaming polypropylene material and a preparation method thereof. Background technique [0002] The depletion of energy sources and the increasingly serious environmental pollution have accelerated the transformation of the automotive industry. For every 10% reduction in vehicle quality, fuel consumption will drop by 6% to 8%, and emissions will drop by 4%. At the same time, the light weight of the car directly increases the specific power of the car and improves the power performance of the car. Therefore, lightweight has become an inevitable trend in the development of the automobile industry. Among them, the lightweight of automobile materials is an effective way to realize the lightweight of the whole vehicle. Micro-foaming technology is a technology that can prepare materials with unique dense skin and foam core structure. Introducing it into the prepara...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/06C08L91/06C08L23/28C08L33/02C08L83/04C08K13/02C08K3/34C08K5/20C08J9/08
CPCC08J9/0061C08J9/0066C08J9/08C08J2203/02C08J2323/12C08J2323/14C08J2423/06C08J2423/12C08J2423/14C08J2423/28C08J2491/06C08K3/34C08K5/20C08K13/02C08K2201/003C08K2201/011C08K2201/014
Inventor 汪淼黄小军魏传刚王俊
Owner WUHU CHUANGKE NEW MATERIAL TECH CO LTD
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