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Supercritical fluid continuous extrusion high-performance recyclable PA foam material and preparation method thereof

A supercritical fluid and foaming material technology, which is applied in the field of foam material preparation, can solve the problems of low molding efficiency, high technical difficulty, and impossibility of continuous production, and achieve high mechanical properties and controllable foaming ratio , Improve the effect of temperature resistance

Active Publication Date: 2020-05-01
CHINA RESOURCES PACKAGING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The technical problem to be solved by the present invention is that the foaming of PA resin in the current market is difficult, the technical difficulty is high, and the foam strength and temperature resistance are not enough to meet the application requirements; the molding efficiency of molded foaming, injection foaming, etc. is low and cannot be achieved. To solve problems such as continuous production, provide a high-performance recyclable PA foam material that uses supercritical fluid to continuously extrude

Method used

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  • Supercritical fluid continuous extrusion high-performance recyclable PA foam material and preparation method thereof
  • Supercritical fluid continuous extrusion high-performance recyclable PA foam material and preparation method thereof
  • Supercritical fluid continuous extrusion high-performance recyclable PA foam material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] Weigh 98 parts of PA6 resin (Hangzhou Polymershun, J2400), 0.5 part of ADR 4468 (multifunctional epoxy compound, BASF), 0.5 part of long carbon chain carboxylate nucleating agent (Bruggemann, P22), 1 part Glass fiber (Hangzhou Gaoke, ECP) ​​is added to the double-stage extrusion foaming equipment, supercritical CO 2 The injection rate is 1.45kg / h; the ZE40 twin-screw extrusion temperature is: 60°C, 120°C, 180°C, 220°C, 230°C, 230°C, 230°C, 230°C, and the screw speed is set at 80rpm. KE90 single screw temperature is 200°C, 200°C, 200°C, 200°C, 200°C, 200°C, the speed is set at 6rpm, and the density is 130Kg / m 3 PA6 foam sheet with uniform and dense cells.

Embodiment 2

[0040] Weigh 69 parts of PA6 resin (Hangzhou Jushun, J2400), 0.5 part of chain extender ADR 4468 (multifunctional epoxy compound, BASF), 0.5 part of MgO (Hangzhou Zhiti, 20um) into the two-stage extrusion foaming equipment, 30 parts of glass fiber (Hangzhou Gaoke, ECP) ​​were added to the system from the side feed, supercritical CO 2 / Cyclopentane mixed gas injection rate 1.5kg / h; ZE40 twin-screw extrusion temperature: 60°C, 120°C, 180°C, 220°C, 230°C, 230°C, 230°C, 230°C, screw speed setting 80rpm . KE90 single screw temperature is 200°C, 200°C, 200°C, 200°C, 200°C, 200°C, the speed is set at 6rpm, and the density is 155Kg / m 3 Fiber-reinforced PA foam sheet with uniform and dense cells.

Embodiment 3

[0042] Weigh 80 parts of PA6 resin (Hangzhou Jushun, J2400), 7 parts of recycled PA6 foam material, 2 parts of PMDA (Wuhan co-created) and ADR 4468 (BASF) mixture, 1 part of SiO 2 (Hangzhou Zhiti, 20um), add two-stage extrusion foaming equipment, 10 parts of glass fiber (Hangzhou Hi-Tech, ECP) ​​are added to the system from the side feed, supercritical CO 2 / Cyclopentane mixed gas injection rate 1.5kg / h; ZE40 twin-screw extrusion temperature: 60°C, 120°C, 180°C, 220°C, 230°C, 230°C, 230°C, 230°C, screw speed setting 80rpm . KE90 single screw temperature is 200°C, 200°C, 200°C, 200°C, 200°C, 200°C, the speed is set at 6rpm, and the density is 160Kg / m 3 Fiber-reinforced PA foam sheet with uniform and dense cells.

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Abstract

The invention relates to a supercritical fluid continuous extrusion recyclable high-performance nylon foam material and a preparation method thereof. The high-performance PA foam material is preparedfrom the following raw materials in parts by weight: 69-98 parts of nylon PA resin, 1-30 parts of fibers, 0.5-2 parts of a chain extender and 0.5-2 parts of a nucleating agent through supercritical fluid double-step (double screws are connected in series with a single screw) extrusion foaming device. The fibers added in the foaming process do not influence the formation of the basic structure of the closed-cell foam, and the foamed fibers are uniformly distributed on the cell walls to play a role of a reinforcement phase. The prepared thermoplastic nylon foam material is high in forming efficiency, capable of achieving continuous production, controllable in foaming ratio, economical, environmentally friendly and recyclable, and generated foam edge cutting materials or unqualified foam products can be crushed, recycled and foamed again. The material has high mechanical properties, thermal stability and creep resistance, and can be applied to the fields of aerospace, wind power, rail transit transportation, buildings and the like.

Description

technical field [0001] The invention relates to the field of foam material preparation, in particular to a supercritical fluid continuous extrusion high-performance recyclable PA foam material and a preparation method thereof. Background technique [0002] The commonly used molding methods for common plastic foam molding are mostly intermittent foaming. The production steps are pre-installation → template into the laminator → template locking → pouring → mold heating, gas injection or chemical foaming → mold opening → pick-up, cleaning → Go to the next cycle. Chinese patent CN 101235128A describes that polyurethane foam has the characteristics of low density, light weight, and excellent heat and sound insulation effects. However, when used as a structural member, polyurethane foam also requires excellent strength, modulus and dimensional stability. In order to make up for this defect, by adding low-cost fibers and other fillers, they are uniformly dispersed in the polymer s...

Claims

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Application Information

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IPC IPC(8): C08L77/06C08L77/02C08L77/10C08K9/04C08K7/14C08K7/06C08J9/12C08J9/14B29C48/05B29C44/20
CPCC08J9/122C08J9/141C08J9/009C08J9/0061B29C48/0012B29C48/05C08J2203/06C08J2203/08C08J2203/14C08J2377/06C08J2377/02C08J2205/052
Inventor 胡广君柳祚龙施文照
Owner CHINA RESOURCES PACKAGING MATERIALS CO LTD
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