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Method for producing graphite extruded plastic plate with CO2 foaming agent

A foaming agent and extruded board technology, which is used in the production of graphite extruded boards by using CO2 foaming agent, can solve the problems that the thermal conductivity of compressive strength needs to be improved, the combustion performance can only reach B2 level, and the stability performance is poor. The effect of eliminating fire hazards, enhancing competitiveness and improving sheet performance

Inactive Publication Date: 2019-01-22
穆振奎
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the combustion performance of extruded boards with Freon and dimethyl ether as foaming agents can only reach B2 level.
[0004] However, CO 2 The boiling point of CO is very low, the vapor pressure at room temperature is high, and the working pressure of the system is relatively high; CO 2 It has poor compatibility with polystyrene and low solubility. It is also necessary to increase the working pressure of the system or adjust the raw material formula to improve its solubility in PS; it is easy to shrink after molding and has poor stability; and there is also a high thermal conductivity. defect
China's patented technology "using CO 2 Combination foaming agent extruded polystyrene foam preparation method "provides a new type of CO 2 Composite foaming agent, which adds a large amount of additives to assist foaming, but parameters such as compressive strength and thermal conductivity still need to be improved

Method used

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  • Method for producing graphite extruded plastic plate with CO2 foaming agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A CO 2 Foaming agent produces the method for graphite extruded plate, it may further comprise the steps:

[0029] 1) Weigh each raw material in parts by weight for later use: 30 parts of graphite polystyrene particles, 62 parts of ordinary polystyrene particles, CO 2 3 parts of foaming agent, 2 parts of nucleating agent, 3 parts of flame retardant;

[0030] The nucleating agent is aluminum oxide, and the flame retardant is melamine.

[0031] 2) Put graphite polystyrene particles, ordinary polystyrene particles, nucleating agent and flame retardant into the extruder through the feeder, and inject CO after fully plasticizing in the extruder 2 The foaming agent is fully mixed and cooled and extruded through the mold. After the mold is extruded, the pressure is released quickly, and the foaming agent wrapped in plastic expands rapidly to form closed cells. Under the action of the cells, polystyrene plastic forms The foam board with honeycomb-shaped closed cells is shaped...

Embodiment 2

[0035] A CO 2 Foaming agent produces the method for graphite extruded plate, it may further comprise the steps:

[0036] 1) Weigh each raw material in parts by weight for later use: 25 parts of graphite polystyrene particles, 68 parts of ordinary polystyrene particles, CO 2 2.5 parts of foaming agent, 1 part of nucleating agent, 3.5 parts of flame retardant;

[0037] 2) Put graphite polystyrene particles, ordinary polystyrene particles, nucleating agent and flame retardant into the extruder through the feeder, and inject CO after fully plasticizing in the extruder 2 The foaming agent is fully mixed and cooled and extruded through the mold. After the mold is extruded, the pressure is released quickly, and the foaming agent wrapped in plastic expands rapidly to form closed cells. Under the action of the cells, polystyrene plastic forms The foam board with honeycomb-shaped closed cells is shaped into the required thickness and width by a shaping tractor, and then cut and shaped...

Embodiment 3

[0041] The main technical indicators of the graphite extruded board of the present invention:

[0042] Take the extruded board used in the market as an example, the comparative data are shown in Table 1:

[0043] Table 1

[0044]

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Abstract

Belonging to the technical field of preparation of extruded plastic plates, the invention discloses a method for producing a graphite extruded plastic plate with a CO2 foaming agent. The method includes: sending graphite polystyrene particles, ordinary polystyrene particles, a nucleating agent and a flame retardant into a plastic extruding machine through a feeding machine, fully plasticizing thesubstances in the extruding machine, then injecting a CO2 foaming agent, fully mixing the substances and performing cooling, then conducting extrusion by a die, then shaping the plate into a requiredthickness and width by a shaping tractor, and conducting cutting molding. The product manufactured by the method provided by the invention completely meets the national standards of heat insulation plates.

Description

technical field [0001] The invention belongs to the technical field of extruded board preparation, in particular to a 2 The foaming agent produces the method for extruded graphite plate. Background technique [0002] Polystyrene foam technology is a method of using a foaming agent to foam polystyrene to prepare boards. At present, the industry is in the process of eliminating HCFC blowing agents. For products that use Freon as a blowing agent, the small bubbles are filled with fluorine gas. Because fluorine gas is much heavier than air, these blowing agents will It radiates to the outside world for a long time, and after about a year, it is completely radiated and replaced by air filling. During this long process, the fluorine gas volatilized from the extruded boards used for insulation on walls, roofs, and floors, etc., will seriously harm the the health of each of us. Therefore, environmentally friendly CO 2 The application of graphite extruded board is imperative a...

Claims

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Application Information

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IPC IPC(8): C08J9/12C08J9/14C08L25/06C08K13/02C08K3/04C08K3/22C08K5/3492
CPCC08J9/122C08J9/125C08J9/142C08J2203/06C08J2203/10C08J2203/12C08J2325/06C08K2003/2227C08L25/06C08L2201/02C08L2203/14C08L2205/025C08K13/02C08K3/04C08K3/22C08K5/34922
Inventor 穆振奎李玉金孙达郭文红王琦
Owner 穆振奎
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