Polypropylene and kieselguhr composite material and method for preparing same

A technology of composite materials and diatomite, applied in the field of polymer materials, can solve the problems of poor low temperature impact resistance and easy aging, and achieve high impact strength, good extrusion strength and good wear resistance

Inactive Publication Date: 2014-02-26
JIANGSU HONGYI BIOCHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a composite material of polypropylene and diatomite and its preparation method. Aiming at the shortcomings of polypropylene material, such as poor low-temperature impact resistance and easy aging, by blending and compounding with a certain amount of diatomite The obtained material can effectively improve the extensibility, have higher impact strength, tensile strength, tear strength, light weight and softness, and good wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Take 80 parts of homopolypropylene, the melt index of the polypropylene is 7g / 10min, and the impact strength is 40 kJ / square meter (23 degrees Celsius). Take 10 parts of diatomite produced in Shengzhou, Zhejiang Province after calcining and crushing to 1250 meshes, 3 parts of ethylene-vinyl acetate copolymer EVA, 1.4 parts of plasticizer monoglyceride, 1 part of coupling agent titanate, and 1010 parts of antioxidant. [β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid] 0.1 part.

[0026] The method for preparing polypropylene and diatomite composite material comprises the following steps:

[0027] (1) Add polypropylene, diatomaceous earth, EVA, plasticizer, coupling agent, and antioxidant into a high-speed mixer (SRL type), and mix evenly at 130-145°C to complete the grafting reaction, and then Cool to below 80°C;

[0028] (2) Send the mixture obtained in step (1) into a twin-screw extruder for melt blending, extruding

[0029] The outlet temperature is 200°C, an...

Embodiment 2

[0032] Take 85 parts of homopolypropylene, the melt index of the polypropylene is 7g / 10min, and the impact strength is 40 kJ / square meter (23 degrees). Take 12 parts of diatomite produced in Shengzhou, Zhejiang Province after calcining and crushing to 1250 meshes, 4 parts of ethylene-vinyl acetate copolymer EVA, 1.6 parts of plasticizer n-butyl stearate, 1.5 parts of coupling agent aluminate, antioxidant Model 168 is 0.1 parts of tris[2.4-di-tert-butylphenyl]phosphite.

[0033] All the other implementations are as in Example 1.

[0034] The obtained product had a melt index of 6 g / 10 min and an impact strength of 55 kilojoules / square meter (23 degrees Celsius).

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Abstract

The invention discloses a polypropylene and kieselguhr composite material and a method for preparing the same. The polypropylene and kieselguhr composite material is produced by mixing and extruding the following raw materials in parts by weight: 80-90 parts of polypropylene, 10-15 parts of kieselguhr, 3-5 parts of ethylene-vinyl acetate copolymer EVA, 1.4-1.8 parts of plasticizer, 1-2 parts of coupling agent and 0.1-0.2 part of antioxidant. The material obtained in the invention does not need for addition of any pigment, has a natural coffee color, excellent extensibility, higher impact strength, tensile strength, tearing strength, lightness, softness, good abrasion resistance and good compressive strength, and can be used for injection moulding of various food packing materials, inside packing of industrial products and electronic products and the like.

Description

technical field [0001] The invention relates to polymer materials, in particular to composite materials of polypropylene and diatomite. Background technique [0002] Polypropylene is a thermoplastic resin obtained by polymerizing propylene, which is non-toxic and tasteless. There are three configurations: isotactic, atactic and syndiotactic, and industrial products use isotactic as the main component. Polypropylene also includes copolymers of propylene and a small amount of ethylene. Usually translucent colorless solid, odorless and non-toxic. Due to the regular structure and high crystallization, the melting point is as high as 167°C, and the product can be sterilized by steam is its outstanding advantage. With a density of 0.90g / cm3, it is the lightest general-purpose plastic. Corrosion resistance, tensile strength 30MPa, strength, rigidity and transparency are better than polyethylene. The disadvantage is that it has poor low temperature impact resistance and is ea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/12C08L23/08C08K13/02C08K3/34B29B9/06
Inventor 刘仲宜盛红兵裘雪予
Owner JIANGSU HONGYI BIOCHEM TECH
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