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1. 发明公开

EP4339233A1 POLYPROPYLENE RESIN FOAM PARTICLES, METHOD FOR PRODUCING SAME, AND POLYPROPYLENE RESIN FOAM PARTICLE MOLDED BODY 审中-实审
公开(公告)号：EP4339233A1
公开(公告)日：2024-03-20
申请号：EP22828343.8
申请日：2022-06-17
申请人： JSP Corporation
发明人： SAKAMURA Takumi , OHTA Hajime
IPC分类号： C08J9/22
摘要： Provided is a polypropylene-based resin expanded bead (1) having a tubular shape with a through-hole and a method for producing the same. An average hole diameter (d) of the through-hole (11) of the expanded beads (1) is less than 1 mm. A ratio diD of the average hole diameter (d) to an average outer diameter (D) of the expanded bead (1) is 0.4 or less. The expanded bead (1) has a foamed core layer (2) and a fusion-bondable layer (3). A mass ratio of the foamed core layer (2) and the fusion-bondable layer (3) is foamed core layer : fusion-bondable layer = 99.5 : 0.5 to 85 : 15. The polypropylene-based resin constituting the foamed core layer 2 has a flexural modulus of 800 MPa or more and less than 1200 MPa, and a melting point Tmc of 150°C or lower.

2. 发明公开

EP4339232A1 METHOD FOR PRODUCING POLYPROPYLENE RESIN FOAM PARTICLES 审中-实审
公开(公告)号：EP4339232A1
公开(公告)日：2024-03-20
申请号：EP22875631.8
申请日：2022-08-16
申请人： JSP Corporation
发明人： HIRA Akinobu , NOHARA Tokunobu
IPC分类号： C08J9/18
摘要： Provided is a method for producing polypropylene-based resin expanded beads containing a post-consumer recycled material of a polypropylene-based resin foamed molded article containing carbon black in order to enable provision of a black expanded beads molded article excellent in appearance and physical properties using a post-consumer recycled material of a polypropylene-based resin foamed molded article containing carbon black.
The method for producing polypropylene-based resin expanded beads includes: a mixing step of melt-mixing a polypropylene-based resin having a melt flow rate of 1 g/10 min or more and 15 g/10 min or less at 230°C under a load of 2.16 kg and a polypropylene-based resin recovered materials comprising of a recovered materials of a post-consumer recycled material of a polypropylene-based resin foamed molded article with an extruder to obtain a mixture; an extrusion step; and a foaming step, wherein in the mixture, a blending ratio of the polypropylene-based resin is 30 wt% or more and 90 wt% or less, and a blending ratio of the polypropylene-based resin recovered materials is 10 wt% or more and 70 wt% or less (herein, a total of the polypropylene-based resin and the polypropylene-based resin recovered materials is 100 wt%), the polypropylene-based resin recovered materials contains carbon black, and a content ratio of the carbon black in the polypropylene-based resin recovered materials is 0.5 wt% or more and 5 wt% or less, a melting point of the polypropylene-based resin recovered materials is 135°C or higher and 160°C or lower, a melt flow rate of the polypropylene-based resin recovered materials at 230°C under a load of 2.16 kg is higher than a melt flow rate of the polypropylene-based resin at 230°C under a load of 2.16 kg, and a difference between the melt flow rate of the polypropylene-based resin recovered materials and the melt flow rate of the polypropylene-based resin (melt flow rate of polypropylene-based resin recovered materials - melt flow rate of polypropylene-based resin) is 0.1 g/10 min or more and 12 g/10 min or less.

3. 发明公开

EP4310137A1 POLYETHYLENE RESIN FOAMED PARTICLE, AND METHOD FOR PRODUCING SAME 审中-实审
公开(公告)号：EP4310137A1
公开(公告)日：2024-01-24
申请号：EP22771126.4
申请日：2022-03-03
申请人： JSP Corporation
发明人： HAYASHI Tatsuya , HIRA Akinobu
IPC分类号： C08J9/18
摘要： Polyethylene resin foamed particles according to the present invention are obtained by using, as a base material resin, a non-crosslinked linear low density polyethylene. The linear low density polyethylene is a copolymer of ethylene and an α-olefin having 8 carbon atoms, and has a melt flow rate and a density in specified ranges. The foamed particle has an average foam size within a specified range, and has a crystal structure that causes an intrinsic peak and a high temperature peak to appear in the first round of a DSC curve obtained under a specific condition. The total fusion heat quantity (ΔH1) determined from the sum total of a fusion heat quantity (ΔHi) of the intrinsic peak and the fusion heat quantity (ΔHh) of the high temperature peak is within a specified range.

4. 发明公开

EP4241981A1 MULTILAYER POLYETHYLENE RESIN FOAM SHEET AND METHOD FOR PRODUCING SAME 审中-实审
公开(公告)号：EP4241981A1
公开(公告)日：2023-09-13
申请号：EP21909868.8
申请日：2021-10-01
申请人： JSP Corporation
发明人： KAKUTA Hirotoshi , FUJITA Mikidai , KATSUYAMA Naoya
IPC分类号： B32B5/18 , B32B27/18 , B32B27/32
摘要： A polyethylene-based resin multilayer foam sheet includes a polyethylene-based resin foam layer containing a polyethylene-based resin (A) as a base resin, and a conductive layer laminated on at least one side of the foam layer. The conductive layer contains: a mixed resin of one kind of, or two or more kinds of polyethylenes (B) selected from the group consisting of low-density polyethylenes and linear low-density polyethylenes and an ethylene-based copolymer (C) having a structural unit derived from ethylene and a structural unit derived from a monomer having a polar group; and conductive carbon. The amount of the conductive carbon blended in the conductive layer is 3% by mass or more and 15% by mass or less. The difference Tm B - Tm C between the melting point Tm B of the polyethylene (B) and the melting point Tm C of the ethylene-based copolymer (C) each contained in the conductive layer is 30°C or more and 80°C or less.

5. 发明公开

EP4227063A1 METHOD FOR PRODUCING EXTRUDED MOLDING 审中-实审
公开(公告)号：EP4227063A1
公开(公告)日：2023-08-16
申请号：EP23155520.2
申请日：2023-02-08
申请人： JSP Corporation
发明人： YAMAJI, Hiroyuki , HOSHINO, Tomohiro , OHTA, Naofumi
IPC分类号： B29C48/00 , B29C48/09 , B29C44/20 , B29C44/32 , B29C44/34 , B29C44/44 , B29C44/14 , B29C48/16
摘要： To produce a desirable extruded molding including an outer layer having a hollow shape formed by extrusion and a foamed core material formed by fusing foamed particles that are introduced into a hollow portion defined by the outer layer, a thermoplastic resin is extruded through a die (22) to form an outer layer (2) having a hollow shape by extrusion, foamed particles of a thermoplastic resin are introduced into a hollow portion defined by the outer layer (2) through a foamed particle introduction passage (31) that is arranged inside the hollow portion (4) defined by the outer layer (2) so as to orient to an extruding direction for the outer layer (2), and the foamed particles are fused together by supplying steam from a steam supply portion (350) of a steam supply pipe (35) that is arranged inside the hollow portion (4) defined by the outer layer (2) along the extruding direction for the outer layer (2) while discharging the steam through a steam discharge portion (360) of a steam discharge pipe (36) that is arranged inside the hollow portion (4) defined by the outer layer (2) along the extruding direction for the outer layer (2).

6. 发明公开

EP4101628A1 POLYPROPYLENE RESIN FOAM PARTICLES AND POLYPROPYLENE RESIN FOAM PARTICLE MOLDED ARTICLE 有权
公开(公告)号：EP4101628A1
公开(公告)日：2022-12-14
申请号：EP21751204.5
申请日：2021-01-21
申请人： JSP Corporation
发明人： SHIMADA, Tomohito , OHTA, Hajime
IPC分类号： B29K23/00 , C08J9/16 , B29C44/00 , B29C44/44
摘要： An expanded bead having a through hole and including a foamed core layer which defines the through hole therein and which is constituted of a resin composition containing two kinds of polypropylene-based resins having different melting points, and a cover layer covering the foamed core layer and constituted of a polyolefin-based resin. The expanded bead gives a DSC curve in which an endothermic peak intrinsic to the resin composition and another endothermic peak on a higher temperature side thereof appear in a specific heat of fusion ratio.

7. 发明公开

EP3970959A1 THERMOPLASTIC ELASTOMER FOAM PARTICLES AND MOLDED BODY OF SAME 有权
公开(公告)号：EP3970959A1
公开(公告)日：2022-03-23
申请号：EP20809329.4
申请日：2020-04-23
申请人： JSP Corporation
发明人： TAKAGI, Shota , HIRA, Akinobu
IPC分类号： B29K19/00 , B29K23/00 , B29K105/04 , C08J9/18 , C08J9/34 , B29C44/00 , B29C44/36
摘要： The present invention relates to cylindrical expanded thermoplastic elastomer beads provided with through-holes, the expanded thermoplastic elastomer beads including a core layer in an foamed state constituted of a base polymer containing a thermoplastic elastomer and a cover layer covering the core layer and constituted of a thermoplastic polymer, wherein a coefficient of dynamic friction of the thermoplastic polymer is 0.8 or less, and a difference between a melting point (Tmc) of the base polymer and a melting point (Tms) of the thermoplastic polymer is -20°C or more and 20°C or less. The present invention also relates to an expanded thermoplastic elastomer beads molded article formed by subjecting expanded thermoplastic elastomer beads provided with through-holes to in-mold molding, the molded article including a core layer in a foamed state and a cover layer covering the core layer, wherein a voidage is 15% or more, a density is 10 kg/m 3 or more and 200 kg/m 3 or less, and the product of a tensile strength (MPa) and a tensile elongation (%) is 5 or more.

8. 发明公开

EP3702145A1 LAMINATED FOAM SHEET 有权
公开(公告)号：EP3702145A1
公开(公告)日：2020-09-02
申请号：EP20000010.7
申请日：2020-01-10
申请人： JSP Corporation
发明人： Taniguchi, Ryuichi , Kakuta, Hirotoshi
IPC分类号： B32B5/18 , B32B27/06 , B32B27/08 , B32B27/18 , B32B27/32
摘要： A laminated foam sheet having a polyethylene resin foam layer and an outer layer laminated on each side of the foam layer, each outer layer being composed of an outermost surface polyethylene resin layer and an intermediate polyethylene resin layer which is positioned between the outermost surface layer and the foam layer and which contains a specific amount of a polymeric antistatic agent relative to the weight of the intermediate layer and to the basis weight of each of the intermediate layer and outermost surface layer.

9. 发明授权

EP3095811B1 PROPYLENE-BASED RESIN FOAM PARTICLE AND FOAM PARTICLE MOLDED BODY 有权
公开(公告)号：EP3095811B1
公开(公告)日：2020-08-26
申请号：EP14879190.8
申请日：2014-12-24
申请人： JSP CORPORATION
发明人： ONO, Michitoshi , KITAHARA, Taizo , TSURUGAI, Kazuo
IPC分类号： C08J9/224

10. 发明授权

EP3296350B1 CROSSLINKED EXPANDED BEADS AND MOLDED EXPANDED-BEAD OBJECT 有权
公开(公告)号：EP3296350B1
公开(公告)日：2020-06-24
申请号：EP16792439.8
申请日：2016-03-28
申请人： JSP CORPORATION
发明人： TAKAGI, Shota , OIKAWA, Masaharu
IPC分类号： C08J9/18 , C08L53/00 , C08J9/232 , C08J9/12

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