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Open-celled polypropylene microcellular foaming sheet and production method thereof

A technology of microcellular foaming and polypropylene, which is applied in the field of open-cell polypropylene microcellular foam sheet and its production, can solve the problems such as processing difficulties of open-cell polypropylene microcellular foam sheet, and achieve saturation The effect of short time, easy control and high production efficiency

Active Publication Date: 2015-05-20
ZHEJIANG XINHENGTAI ADVANCED MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide an open-cell polypropylene microporous foam sheet and its production method, which solves the defect that the existing open-cell polypropylene microporous foam sheet is difficult to process

Method used

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  • Open-celled polypropylene microcellular foaming sheet and production method thereof
  • Open-celled polypropylene microcellular foaming sheet and production method thereof
  • Open-celled polypropylene microcellular foaming sheet and production method thereof

Examples

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Effect test

Embodiment 1

[0032] Such as figure 1 As shown, a kind of open-cell polypropylene microporous foam sheet comprises the following components: 100 parts by weight of polypropylene resin, 60 parts by weight of polyethylene resin, wherein: the molecular weight distribution value of the polypropylene resin is 16 isotactic polypropylene, the polyethylene resin adopts low-density polyethylene with a molecular weight distribution value of 5.

[0033] The production method adopted by the above-mentioned a kind of open-cell polypropylene microporous foam sheet comprises the following steps:

[0034] a) Mixing of raw materials: the polypropylene resin and polyethylene resin are sucked into the mixer in proportion, and after being fully mixed, sucked into the hopper of the extruder and dried, the drying temperature is 80°C;

[0035] b) Plasticizing and mixing: plasticize and mix the dried raw material mixture in step a) through a twin-screw extruder to form a double continuous phase structure. The tem...

Embodiment 2

[0043] Such as figure 2 As shown, a kind of open-cell polypropylene microporous foam sheet comprises the following components: 100 parts by weight of polypropylene resin, 80 parts by weight of polyethylene resin, wherein the polypropylene resin adopts a molecular weight distribution value of 19 random copolymerized polypropylene, the polyethylene resin adopts high-density polyethylene with a molecular weight distribution value of 7.

[0044] The production method adopted by the above-mentioned a kind of open-cell polypropylene microporous foam sheet comprises the following steps:

[0045] a) Mixing of raw materials: the polypropylene resin and polyethylene resin are sucked into the mixer in proportion, and after being fully mixed, sucked into the hopper of the extruder and dried, the drying temperature is 80°C;

[0046] b) Plasticizing and mixing: Plasticize and mix the dried raw material mixture in step a) through a twin-screw extruder to form a double continuous phase stru...

Embodiment 3

[0054] Such as image 3 As shown, a kind of open-cell polypropylene microporous foam sheet comprises the following components: 100 parts by weight of polypropylene resin, 100 parts of polyethylene resin, wherein: polypropylene resin adopts a high molecular weight distribution value of 21 Melt strength polypropylene, polyethylene resin with a molecular weight distribution value of 11 linear low density polyethylene.

[0055] The production method adopted by the above-mentioned a kind of open-cell polypropylene microporous foam sheet comprises the following steps:

[0056] a) Mixing of raw materials: the polypropylene resin and polyethylene resin are sucked into the mixer in proportion, and after being fully mixed, sucked into the hopper of the extruder and dried, the drying temperature is 80°C;

[0057] b) Plasticizing and mixing: Plasticize and mix the dried raw material mixture in step a) through a twin-screw extruder to form a double continuous phase structure. The temperat...

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Abstract

The invention relates to an open-celled polypropylene microcellular foaming sheet. The open-celled polypropylene microcellular foaming sheet comprises the following components: 100 parts by weight of polypropylene resin and 50-100 parts by weight of polyethylene resin. A production method of the open-celled polypropylene microcellular foaming sheet comprises the following steps: plastifying, mixing, sizing, cutting and forming a bicontinuous phase polypropylene / polyethylene blend foaming base material by virtue of a double-screw extruder, and then carrying out supercritical carbon dioxide solid foaming. The open-celled polypropylene microcellular foaming sheet has the advantages that the bicontinuous phase polypropylene / polyethylene blend base material is formed, and then the base material is foamed at a polypropylene foaming temperature by adopting a solid foaming technology, cells formed in a polyethylene phase in a complete molten state are completely cut-through and penetrate through cell walls of the cells formed in a polypropylene phase, and the open-celled polypropylene microcellular foaming sheet is formed; meanwhile, the obtained open-celled polypropylene microcellular foaming sheet is small in cell size, high foaming ratio and high porosity and can be widely applied to the fields of filtering, sound absorption, ventilation and the like.

Description

technical field [0001] The invention relates to an open-cell polypropylene microporous foam sheet and a production method thereof. Background technique [0002] Polymer microcellular foaming material refers to the cell size less than 100μm and the cell density greater than 1.0×10 6 piece / cm 3 polymer porous foam material. Among many polymer microcellular foaming materials, polypropylene (PP) microcellular foaming materials not only have light weight and save materials, but also have good mechanical properties, high heat distortion temperature, and excellent chemical resistance. and other characteristics, the closed-cell polypropylene microcellular foam material with independent cells can be used in the fields of cushioning, shock absorption, heat insulation, buoyancy materials, etc., while the open-cell polypropylene microcellular foam with interconnected cells Foam materials can be used in filtration, separation, sound absorption, ventilation and other fields. [0003] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08L23/06C08L23/08C08J9/30B29C69/00
CPCB29C69/00C08J9/30C08J2323/06C08J2323/08C08J2323/12C08J2323/14C08L23/06C08L23/0815C08L23/12C08L23/14C08L2205/02C08L2205/03C08L2207/062C08L2207/066
Inventor 姜修磊
Owner ZHEJIANG XINHENGTAI ADVANCED MATERIAL
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