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Method of preparing apertured micropore plastic product semifusion mould press shaping method

A technology of molding and microporous plastics, which is applied in the field of semi-melting molding to prepare open-celled microporous plastic products, which can solve the problems of difficulty in controlling the diameter and opening rate of micropores, complicated processes, and long process, which is not easy to achieve. The effect of degradation, simple process and short time

Inactive Publication Date: 2008-07-02
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] There are two major defects in the above method of preparing open-cell microporous plastic products: 1. The process is complex, the process is long, and the cost is high, such as phase separation, compression-sintering-extrusion and improved thermoforming; 2. Pore ​​diameter and porosity are difficult to control, such as physical foam continuous extrusion method, chemical foam molding method and improved thermoforming method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The 160-mesh ABS (Chimei 757) powder that was ground and sieved by mechanical freezing was dried in an oven at a temperature of 90°C and a vacuum of 0.03MPa for 6 hours, and then 100 parts were weighed and mixed with 2 parts of 10% ABS-tetrahydrofuran solution, Pour 3 parts of dibutyl sebacate and 3 parts of azodicarbonamide together into an electric heating high-speed mixer and mix for 5 minutes. At the same time, when the temperature is preheated to 80°C, unload; put the preheated mixture in a dry In an incubator, at a temperature of 60°C and a relative humidity of 15%, the storage time is 1 hour; put the stored mixture into a preheated constant temperature of 55°C, the thickness of the sheet is 4mm, and the projected area is 20×20mm 2 Clamp the mold in the plastic cavity of the mold, then press it with a hydraulic press for 6 minutes at a molding temperature of 215°C and a pressure of 8 MPa, and deflate twice during the pressing process; finally, cool for 4 minutes wh...

Embodiment 2

[0034] 100 parts of 120 mesh polyvinyl chloride (PVC) resin powder and 3 parts of di-n-butyltin dilaurate, 2 parts of epoxy soybean oil, 3 parts of 20% PVC-dioctyl phthalate / tetrahydrofuran (=1:6 ) solution, 4 parts of methylphenyl silicone oil and 6 parts of benzenesulfonyl hydrazide, poured into an electric heating high-speed mixer and mixed for 8 minutes, and at the same time, when the temperature was preheated to 60 ° C, the material was discharged; the preheated mixture was put into Store in a dry incubator for 5 hours at a temperature of 45°C and a relative humidity of 50%; put the stored mixture into a mold cavity that has been preheated to a constant temperature of 45°C, with a sheet thickness of 5mm and a diameter of 15mm , close the mold, and then press it with a hydraulic press for 4 minutes at a molding temperature of 185 ° C and a pressure of 10 MPa, and deflate once during the pressing process; finally, cool for 5 minutes while maintaining a pressure of 5 MPa. Th...

Embodiment 3

[0036] Pour 100 parts of 60-mesh ultra-high molecular weight polyethylene powder, 3 parts of naphthenic oil and 2 parts of ethyl silicone oil into an electric heating high-speed mixer and mix for 8 minutes. Put the preheated mixture in a dry incubator at a temperature of 65°C and a relative humidity of 55%, and store it for 10 hours; put the stored mixture in a preheated constant temperature of 85°C, the thickness of the sheet is 2mm, and the diameter is Clamp the mold in a 10mm plastic mold cavity, and then press it with a hydraulic press at a molding temperature of 175°C and a pressure of 6 MPa for 3 minutes without releasing air during the pressing process; finally, cool for 3 minutes while maintaining a pressure of 5 MPa. The pore diameter of the obtained perforated microporous circular sheet is 5-20um, and the porosity is 60±5%.

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Abstract

A semi-fusing and die-pressing method for preparing the milliporous plastic product with open pores includes such steps as mixing the synthetic resin particles with at least one of plasticizer, viscosity increaser, foaming agent and disperser, preheating, storing in a temp and humidity constant container, filling in preheated die, hot die pressing, and cooling while holding the pressure.

Description

1. Technical field [0001] The invention belongs to the technical field of preparation of open-cell microporous plastic products, in particular to a method for preparing open-cell microporous plastic products by semi-melt compression molding. 2. Background technology [0002] Open-cell microporous plastic products refer to plastic products that have countless micropores with a pore size of 0.01-50um, and the pores are connected to each other. Such plastic products include thermal insulation parts, seals, filter plates, shock absorbers, etc., and can be widely used in batteries, environmental protection, chemical industry, water treatment, gas filtration, solid-liquid separation, construction, transportation, packaging, home appliances , medical equipment and other fields. [0003] At present, the methods for preparing open-cell microporous plastic products mainly include phase separation method, improved thermoforming method, physical foaming continuous extrusion method, com...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C43/02B29C44/02C08L9/00C08J3/18B29K23/00B29K27/06B29K27/12B29K25/00B29K69/00B29K67/00B29K55/00B29K71/00
Inventor 吴智华陈涛郭少华陈虹
Owner SICHUAN UNIV
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