Polystyrene serial resin extruded foam plate and its producing method

A technology of polystyrene and a manufacturing method, which is applied in the field of extruded foam boards of polystyrene resins, can solve the problems of high thermal conductivity, high flammability of isobutane, difficulty in flame retardancy of foam, and achieve global warming. The effect of small coefficients

Inactive Publication Date: 2003-01-22
JSP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] However, although the thermal conductivity of isobutane in a gaseous state is lower than that of air, compared with conventionally used CFC, HCFC, and HFC, the thermal conductivity in a gaseous state is...

Method used

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  • Polystyrene serial resin extruded foam plate and its producing method

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Effect test

Embodiment 1、3、4

[0093] Embodiment 1, 3, 4, comparative example 1, 2

[0094] As a raw material, 100 parts by weight of polystyrene (G330C manufactured by Toyo Styrene Co., Ltd.) was used as a talc masterbatch (composed of 69% by weight of the above-mentioned polystyrene and 30 parts by weight of talc (Hifira-#12 manufactured by Matsumura Sangyo Co., Ltd.)) as a cell regulator. % by weight and zinc stearate 1% by weight of zinc stearate) 16.7 parts by weight, 3 parts by weight of hexabromocyclododecane as a flame retardant and a mixture of a small amount of stabilizer and the amount shown in Table 1 (per 1 kg of polystyrene blowing agent injection amount (mol / kg)) in the ratio shown in Table 1 mixed with isobutane, methyl chloride, dimethyl ether, carbon dioxide blowing agent.

[0095] The extruder used was an extruder with a diameter of 65 mm (hereinafter referred to as "the first extruder"), an extruder with a diameter of 90 mm (hereinafter referred to as "the second extruder"), and an extru...

Embodiment 2

[0103] An extruded foam board was produced in the same manner as in Embodiment 1 except that the addition amount of the talc masterbatch was changed to 8.3 parts by weight. Table 2 shows the apparent density, thickness, independent cell ratio, average cell diameter in the thickness direction, cell deformation rate, thermal conductivity, flammability, and blowing agent remaining amount of the obtained extruded foam board.

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Abstract

A polystyrene resin extruded foam plate is obtained by extruding a foamable molten resin mixture comprising a mixed blowing agent containing the isobutane (except a chlorofluorocarbon and/or a fluorocarbon) and a polystyrene resin from a high-pressure zone to a low-pressure zone and has >=10 mm thickness and 25-60 kg/m3 apparent density. The residual amount of the isobutane in the foam plate is 0.45-0.80 mol based on 1 kg of the foam plate. Furthermore, the foam plate has 0.05-0.18 mm average cell diameter in the thickness direction and 0.7-1.2 cell deformation ratio (the average cell diameter in the thickness direction/the average cell diameter in the horizontal direction) and satisfies type 3 of the flammability standard of the polystyrene extruded foam heat insulating plate described in JIS A9511(1995) and further has <=0.028 W/mK thermal conductivity of the foamed plate.

Description

technical field [0001] The present invention relates to a polystyrene-based resin extruded foam board used as a heat insulating material for a wall, a floor, a roof, etc. of a building, or as a mat core material, and a method for producing the same. Background technique [0002] In the past, polystyrene-based resin foam has been widely used as a plate-shaped heat insulating material because of its excellent heat insulating properties and suitable mechanical strength. It is known that such a foam board is produced by adding a foam regulator to a polystyrene-based resin material, heating, melting and kneading, adding a physical foaming agent, and extruding the mixture from a high-pressure zone to a low-pressure zone. manufacturing method. [0003] As the blowing agent used in the manufacture of the above-mentioned foam boards, chlorofluorocarbons (hereinafter referred to as CFCs) such as dichlorodifluoromethane have been widely used in the past. However, since CFCs have a hig...

Claims

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Application Information

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IPC IPC(8): B29C44/50B29C48/90C08J9/14
CPCC08J2201/03B29C47/0019C08J9/141B29C44/50C08J2325/06B29C47/903C08J2203/12C08J9/149C08J2203/14B29C44/505B29C48/07B29C48/903B29C48/908Y10T428/249953
Inventor 极乐广行小暮直亲今成大典内藤真人高桥诚治
Owner JSP CORP
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