Resin foam and foamed member
A technology of resin foam and components, which is applied in the direction of synthetic resin layered products, transportation and packaging, chemical instruments and methods, etc., can solve the problems of changing the physical properties of foam and complex production processes, etc., and achieve excellent processability, The effect of preventing foam breakage and high flexibility
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Embodiment 1
[0123] Using a twin-screw extruder manufactured by Japan Steel Works (Japan Steel Works, Ltd.,) (JSW), at 200°C, 40 parts by weight of polypropylene [melt flow rate (MFR): 0.35g / 10min ], 55 parts by weight of polyolefin-based elastomer [melt flow rate (MFR): 6g / 10min, JIS hardness A: 79°], 6 parts by weight of carbon black (trade name "Asahi#35", produced by Asahi Carbon produced by the company) and 10 parts by weight of magnesium hydroxide (average particle diameter: 0.7 μm) as a powder flame retardant are kneaded, then extruded into strips, water-cooled, and formed into pellets. The softening point of the pellets is 155°C and the density of the pellets is 0.95 g / cm 3 .
[0124] The pellets were charged into a single-screw extruder manufactured by Nippon Steel Works, and carbon dioxide gas was injected under a pressure of 22 (19 after injection) MPa in an environment of 220°C. After the carbon dioxide is fully saturated, the pellets are cooled to a temperature suitable for ...
Embodiment 2
[0129] One surface of the resin foam (A) was subjected to surface heat fusion treatment in the same manner as in Example 1 except that the resin foam (A) was brought into contact with the heat roll for 7.0 seconds. As a result, a resin foam having a surface with a 60° gloss value of 2.6 was obtained.
Embodiment 3
[0131] In the same manner as in Example 1, except that the resin foam (A) was brought into contact with the heat roll for 4.2 seconds, one surface of the resin foam (A) was subjected to surface heat fusion treatment. As a result, a resin foam having a surface with a 60° gloss value of 2.4 was obtained.
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