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Method for super-critically extruding and foaming PS (Polystyrene) composite material

A technology of extruding foaming and composite materials, which is applied in the field of foaming material processing, and can solve problems such as inconsistent cell sizes

Inactive Publication Date: 2019-01-18
肇庆凯艺装饰制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problem that existing PS composite foaming materials have inconsistent cell sizes, the invention discloses a method for supercritical extrusion foaming of PS composite materials. The method for supercritical extrusion foaming of PS composite materials can effectively improve the The cell size stability of the PS composite material after supercritical foaming greatly reduces the size difference between different cells

Method used

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Embodiment 1

[0036] This embodiment discloses a method for supercritical extrusion and foaming of PS composite materials, comprising the following steps:

[0037] Step 1: Weigh polystyrene, polyester thermoplastic elastomer, dihydroxyacrolein and nano titanium nitride according to the following mass ratio, polystyrene: polyester thermoplastic elastomer: dihydroxy acrolein: nano titanium nitride = 63:25:3:2;

[0038] Step 2: Put the polystyrene, polyester thermoplastic elastomer, dihydroxyacrolein and nano-titanium nitride obtained in step 1 into a high-speed disperser for high-speed dispersion mixing, and add the mixed mixture into the melt extruder , heat and melt in a melt extruder to obtain a foaming precursor, and the extrusion temperature is 170±5°C;

[0039] Step 3: Add the foaming precursor obtained in step 2 into a supercritical foaming extruder, keep the foaming precursor in a molten state, inject supercritical gas into the middle of the supercritical foaming extruder, and superc...

Embodiment 2

[0041] This embodiment discloses a method for supercritical extrusion and foaming of PS composite materials, comprising the following steps:

[0042] Step 1: Weigh polystyrene, polyurethane thermoplastic elastomer, dihydroxyacrolein and nano-titanium nitride according to the following mass ratio, polystyrene: polyurethane thermoplastic elastomer: dihydroxyacrolein: nano-titanium nitride = 75: 11:1:3;

[0043] Step 2: Put the polystyrene, polyurethane thermoplastic elastomer, dihydroxyacrolein and nano-titanium nitride obtained in step 1 into a high-speed disperser for high-speed dispersion mixing, and add the mixed mixture into the melt extruder, Heat and melt in a melt extruder to obtain a foaming precursor, and the extrusion temperature is 170±5°C;

[0044] Step 3: Add the foaming precursor obtained in step 2 into a supercritical foaming extruder, keep the foaming precursor in a molten state, inject supercritical gas into the middle of the supercritical foaming extruder, an...

Embodiment 3

[0046] This embodiment discloses a method for supercritical extrusion and foaming of PS composite materials, comprising the following steps:

[0047] Step 1: Weigh polystyrene, polyester thermoplastic elastomer, dihydroxyacrolein and nano titanium nitride according to the following mass ratio, polystyrene: polyester thermoplastic elastomer: dihydroxy acrolein: nano titanium nitride = 85:21:3:1;

[0048] Step 2: Put the polystyrene, polyester thermoplastic elastomer, dihydroxyacrolein and nano-titanium nitride obtained in step 1 into a high-speed disperser for high-speed dispersion mixing, and add the mixed mixture into the melt extruder , heat and melt in a melt extruder to obtain a foaming precursor, and the extrusion temperature is 170±5°C;

[0049] Step 3: Add the foaming precursor obtained in step 2 into a supercritical foaming extruder, keep the foaming precursor in a molten state, inject supercritical gas into the middle of the supercritical foaming extruder, and superc...

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Abstract

The invention discloses a method for super-critically extruding and foaming a PS (Polystyrene) composite material. The method comprises the following steps: step 1: weighing polystyrene, a thermoplastic elastomer, a connection monomer and a nucleating agent, wherein the connection monomer is a monomer with a carbon-carbon double bond and hydroxyl and the nucleating agent is nano titanium nitride;step 2: carrying out high-speed dispersion and mixing on the polystyrene, the thermoplastic elastomer, the connection monomer and the nucleating agent in step 1; adding a mixed mixture into a fusion extruder; heating, fusing and extruding in the fusion extruder to obtain a foaming precursor; and step 3: adding the foaming precursor obtained by step 2 into a super-critical foaming extruder to obtain the PS foaming composite material. By adopting the method for super-critically extruding and foaming the PS composite material, the problem that the sizes of foam holes are inconsistent is solved.

Description

technical field [0001] The invention relates to the technical field of foaming material processing, in particular to a method for supercritical extrusion and foaming of PS composite materials. Background technique [0002] PS (polystyrene-based plastics) refers to a class of plastics that include styrene-based macromolecular chains, including styrene and its copolymers. Specific varieties include ordinary polystyrene (GPPS), high-impact polystyrene (HIPS) ), expandable polystyrene (EPS) and metallocene polystyrene (SPS), etc. [0003] In actual use, other polymer materials are often used for blending modification with PS to modify the physical properties of PS materials to obtain PS composite materials, so that they can adapt to different use environments. [0004] In some application fields, PS composite materials need to be foamed, and in PS composite materials, especially composite materials of PS and polyester or polyurethane thermoplastic elastomers, due to the poor bl...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08L25/06C08L75/04C08L67/00C08K3/28
CPCC08J9/0061C08J9/0071C08J9/122C08J2203/06C08J2325/06C08J2467/00C08J2475/04C08K3/28C08K2201/011
Inventor 卓伟利
Owner 肇庆凯艺装饰制品有限公司
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