Resin foam particles, resin foam shaped product, and laminate
AssigneeAsahi Kasei Kabushiki Kaisha
InventorTetsuo Nakamoto
Life of this patent
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Abstract
Provided are resin foam particles that enable shaping of a sound absorbing member having excellent sound absorption performance through a resin foam shaped product. Also provided is a laminate that includes a resin foam shaped product as a base material and with which high sound absorption performance can be obtained even when the laminate is a thin material. The resin foam particles contain a resin and have a recessed external part. A ratio ρ0/ρ1 of density of the resin ρ0 and true density ρ1 of the resin foam particles is 2 to 20, and a ratio ρ1/ρ2 of true density ρ1 of the resin foam particles and bulk density ρ2 of the resin foam particles is 1.5 to 4.0.
Claims3
A laminate comprising a surface material (I) including a fiber assembly and a base material (II) including a resin foam shaped product, wherein
- the resin foam shaped product is obtained by fusing together resin foam particles comprising a resin and having a recessed external part,
- a ratio ρ0/ρ1 of density ρ0 of the resin and true density ρ1 of the resin foam particles is 2 to 20,
- a ratio ρ1/ρ2 of true density ρ1 of the resin foam particles and bulk density ρ2 of the resin foam particles is 1.5 to 4.0,
- the resin foam shaped product includes pores that are continuous between the resin foam particles that have been fused and has a porosity of 15% to 80%,
- the fiber assembly has a mass per unit area of 10 g/m2 to 300 g/m2, an average apparent density of 0.10 g/cm3 to 1.0 g/cm3, an average fiber diameter of 0.6 μm to 50 μm, and an air permeability of 2 cc/(cm2·sec) to 70 cc/(cm2·sec), and
- the laminate has a thickness of 3 mm to 80 mm.
Dependencies are inferred from the claim text.