公开(公告)号：US20200165404A1

公开(公告)日：2020-05-28

申请号：US16613396

申请日：2018-05-15

Applicant: JSP Corporation

Inventor： Shota TAKAGI ,  Masaharu OIKAWA

IPC: C08J9/18 ,  C08J9/12 ,  C08K5/14 ,  C08J9/228 ,  C08J9/224

Abstract: The present invention provides thermoplastic olefin elastomer crosslinked expanded beads, having a content of a fraction insoluble in hot xylene of 10 to 40 wt %, and having a crystal structure such that a melting peak inherent in the thermoplastic olefin elastomer (inherent peak) and one or more melting peaks on a higher temperature side than the inherent peak (high temperature peak) appear on a DSC curve obtained by heating the crosslinked expanded beads from 23° C. to 200° C. at a heating rate of 10° C./min, wherein in the DSC curve, a total heat of melting is 40 to 60 J/g, and a ratio of a heat of melting of the high temperature peak to the total heat of melting is 0.1 to 0.6.

公开(公告)号：US20190270861A1

公开(公告)日：2019-09-05

申请号：US16344891

申请日：2017-11-02

Applicant: JSP Corporation

Inventor： Shota TAKAGI ,  Masaharu OIKAWA

IPC: C08J9/232 ,  C08J9/18 ,  C08J3/20

Abstract: The present invention is concerned with expanded beads of a block copolymer of a polyethylene block and an ethylene/α-olefin copolymer block, wherein a xylene insoluble fraction (A) of the expanded beads by a hot xylene extraction method is 10 to 70% by weight, and a ratio (A/B) of the xylene insoluble fraction (A) to a xylene insoluble fraction (B) of the expanded beads by a hot xylene extraction method when divided into two equal parts and measured is 1.0 to 1.1, and is able to provide expanded beads with excellent in-mold moldability and an expanded beads molded article with excellent fusion bondability and restorability.

公开(公告)号：US20190263993A1

公开(公告)日：2019-08-29

申请号：US16333479

申请日：2017-09-15

Applicant: JSP Corporation

Inventor： Shota TAKAGI ,  Masaharu OIKAWA

IPC: C08J9/18 ,  B29C44/44 ,  B29C44/34

Abstract: The present invention provides expanded beads comprising a crosslinked multi-block copolymer containing an ethylene block and an ethylene-α-olefin copolymer block, having an apparent density of 40 to 300 g/L, a gel fraction of 30 to 70% by weight by a hot xylene extraction method, an average cell diameter (a) of 50 to 180 μm, and an average surface layer thickness (b) of 3 to 27 μm, and the expanded beads are excellent in in-mold moldability, and can produce an expanded beads molded article being excellent in tensile characteristics in a well balanced manner.

公开(公告)号：US20180127559A1

公开(公告)日：2018-05-10

申请号：US15572873

申请日：2016-03-28

Applicant: JSP Corporation

Inventor： Shota TAKAGI ,  Masaharu OIKAWA

IPC: C08J9/18 ,  C08J9/224 ,  C08J9/228 ,  C08F297/08

CPC classification number: C08J9/18 ,  C08F210/16 ,  C08F297/086 ,  C08J9/122 ,  C08J9/224 ,  C08J9/228 ,  C08J9/232 ,  C08J2201/026 ,  C08J2203/06 ,  C08J2205/06 ,  C08J2207/00 ,  C08J2323/08 ,  C08J2353/00 ,  C08L53/00

Abstract: An object of the present invention is to provide expanded beads capable of producing an expanded beads molded article that is excellent in in-mold moldability and is excellent with good balance in lightweight property, flexibility, repulsion, restorability, and tensile characteristics, and an expanded beads molded article using the expanded beads. For achieving the object, the present invention provides crosslinked expanded beads produced by crosslinking and expanding particles containing a multi-block copolymer containing a polyethylene block and an ethylene-α-olefin copolymer block, the multi-block copolymer having a melt flow rate of from 2 to 10 g/10 min at 190° C. and a load of 2.16 kg, and a Shore A hardness of from 65 to 90 measured according to ASTM D2240, the crosslinked expanded beads having a gel fraction of from 30 to 60% by a hot xylene extraction method. The expanded beads molded article of the present invention is produced by subjecting the crosslinked expanded beads of the present invention, to in-mold molding. The expanded beads molded article of the present invention may have an apparent density of from 40 to 150 g/L.

公开(公告)号：US20140171524A1

公开(公告)日：2014-06-19

申请号：US14105685

申请日：2013-12-13

Applicant: JSP Corporation

Inventor： Mitsuru SHINOHARA ,  Masaharu OIKAWA

IPC: C08F14/22 ,  C08J9/18

CPC classification number: C08F14/22 ,  C08F214/22 ,  C08J9/122 ,  C08J9/125 ,  C08J9/18 ,  C08J9/232 ,  C08J2201/034 ,  C08J2203/06 ,  C08J2203/10 ,  C08J2205/044 ,  C08J2205/052 ,  C08J2327/16

Abstract: There is provided polyvinylidene fluoride resin expanded beads which have a high expansion ratio, do not shrink easily, and are capable of obtaining a molded article of the expanded beads that is excellent in mold reproducibility and dimensional stability. The polyvinylidene fluoride resin expanded beads include a polyvinylidene fluoride resin as a base resin, in which a flexural modulus of the polyvinylidene fluoride resin is 450 MPa or more, a melt flow rate (MFR) of the polyvinylidene fluoride resin is 1 g/10 min or more at 230° C. and 2.16 kg load, an apparent density of the expanded beads is 25 to 150 g/L, and a closed cell content of the expanded beads is 80% or more.

Abstract translation: 提供具有高膨胀率的聚偏二氟乙烯树脂发泡珠，不容易收缩，并且能够获得模具再现性和尺寸稳定性优异的发泡珠粒的模塑制品。 聚偏二氟乙烯树脂发泡粒子包括聚偏氟乙烯树脂的挠曲模量为450MPa以上的聚偏二氟乙烯树脂作为基础树脂，聚偏二氟乙烯树脂的熔体流动速率（MFR）为1g / 10分钟 以上，230℃，2.16kg负荷下，发泡珠的表观密度为25〜150g / L，发泡珠的闭孔含量为80％以上。