公开(公告)号：US11529754B2

公开(公告)日：2022-12-20

申请号：US16494255

申请日：2018-03-19

Applicant: JSP CORPORATION

Inventor： Tomoo Tokiwa ,  Hiroki Kawakami

IPC: B29C44/14 ,  B29C44/44 ,  B32B5/24 ,  B32B27/12

Abstract: A skin material-coated foamed particle molded body includes a skin material made of a polypropylene-based resin molded body and a polypropylene-based resin foamed particle molded body coated with the skin material. The skin material has a multilayer structure including an inner layer adhered to the foamed particle molded body and an outer layer outside the inner layer. The outer layer contains a polypropylene-based resin and a reinforcement fiber. The inner layer contains the polypropylene-based resin and a reinforcement fiber in a lower content ratio than a content ratio of the reinforcement fiber contained in the outer layer or contains the polypropylene-based resin and substantially no reinforcement fiber. An average value of the outer layer thickness ratio to a sum of the outer and inner layer thicknesses is 0.20 or more and 0.65 or less, and a coefficient of variation Cv of the ratio is 30% or less.

公开(公告)号：US11420365B2

公开(公告)日：2022-08-23

申请号：US16469009

申请日：2017-12-21

Applicant: JSP CORPORATION

Inventor： Hiroki Kawakami ,  Tomoo Tokiwa

IPC: B29C44/18 ,  C08J9/236 ,  C08L23/16 ,  B29B11/06 ,  C08J9/232 ,  B29K23/00 ,  B29K105/04

Abstract: A method for producing a foamed particle molded article provided with a skin, includes: forming a hollow molded article; filling a hollow part of the hollow molded article with polypropylene-based resin foamed particles; and heating and fusing the particles to each other. A melt elongation at 190° C. of the polypropylene-based resin forming the hollow molded article is 100 m/min or more. A half-crystallization time at 100° C. of the polypropylene-based resin is between 25 to 80 seconds. In heat flux differential scanning calorimetry, a melting peak temperature of the polypropylene-based resin is between 130 to 155° C., a partial heat of fusion at 140° C. or more of the polypropylene-based resin is between 20 to 50 J/g, and a ratio of the partial heat of fusion of the polypropylene-based resin to the total (partial heat of fusion/total heat of fusion) is between 0.2 to 0.8.