公开(公告)号：DE60000106D1

公开(公告)日：2002-05-08

申请号：DE60000106

申请日：2000-05-26

Applicant: JSP CORP

Inventor： KOGURE NAOCHIKA ,  GOKURAKU HIROYUKI ,  KITAHAMA TAKASHI

IPC: B29B11/14 ,  B29C43/20 ,  B29C49/22 ,  B29C67/00 ,  B29L31/10 ,  B29L31/30 ,  B32B37/28 ,  B60R21/02 ,  B65D1/00 ,  B29C44/06 ,  B29C43/14

Abstract: Disclosed herein is a skin-bearing expansion-molded article of a thermoplastic resin, which is formed by holding a cylindrical multi-layer foamed parison comprising a foamed thermoplastic resin layer and thermoplastic polymer layers situated on both outer and inner sides of the foamed layer in a mold to compression-mold it, wherein the molded article has a skin formed of the outer-side polymer layer of the multi-layer foamed parison on the surface thereof, and on the inner side of the skin, a core formed by fusion-bonding at least a part of the inner-side polymer layer of the multi-layer foamed parison to each other and a foam formed of the foamed layer of the multi-layer foamed parison.

公开(公告)号：HK1039241A1

公开(公告)日：2002-04-12

申请号：HK01107900

申请日：2001-11-09

Applicant: JSP CORP

Inventor： ISHIHARA YOSHIHISA ,  AOKI TAKESHI ,  IWASAKI SATOSHI ,  KAKUTA HIROTOSHI

IPC: H04R20060101 ,  H04R7/02 ,  C08G64/06 ,  H04R7/00

Abstract: The present invention relates to a speaker unit comprising a diaphragm comprising a 0.5 to 10 mm thick aromatic polycarbonate with a density of 0.03 to 0.6 g/cm , and a mechanism for driving the diaphragm. The elastic modulus in tension of the aromatic polycarbonate resin foam sheet or plate used to form the diaphragm for the speaker unit of the present invention is preferably at least 1 MPa at temperatures of 25 DEG C, 50 DEG C, 80 DEG C, and 105 DEG C, the tan delta of the foam sheet or plate is preferably at least 0.02 at a temperature ranging from 25 to 105 DEG C during measurement of the dynamic viscoelasticity in bending tests giving 1 Hz frequency oscillation strain, and the mean cell diameter of the foam sheet or plate is preferably 0.05 to 1 mm, with a foaming agent left over content of no more than 0.3 mol/kg in the foam forming said diaphram. The aromatic polycarbonate resin forming the diaphragm in the present invention preferably comprises an aromatic polycarbonate resin derived from bisphenol, preferably with a viscosity average molecular weight of 25,000 to 70,000. The percentage of open cells in the aromatic polycarbonate resin foam forming the diaphragm in the present invention is preferably no more than 50%. The diaphragm of the speaker unit in the present invention may comprise a film or sheet of an unfoamed thermoplastic resin laminated to at least one side of a 0.5 to 10 mm thick aromatic polycarbonate resin foam with a density of 0.03 to 0.6 g/cm . The present invention also relates to a speaker system comprising such a speaker unit attached to a cabinet. The present invention also relates to a method for manufacturing a speaker diaphragm, comprising the steps of forming a 0.5 to 10 mm thick aromatic polycarbonate resin foam sheet or plate with a density of 0.03 to 0.6 g/cm .

公开(公告)号：AT202972T

公开(公告)日：2001-07-15

申请号：AT95106966

申请日：1995-05-09

Applicant: JSP CORP

Inventor： TOKORO HISAO ,  SHIOYA SATORU ,  HINOKAWA AKIRA

IPC: C08J9/228 ,  B29C44/00 ,  B29C67/20 ,  B29K23/00 ,  B29K105/04

公开(公告)号：SG77671A1

公开(公告)日：2001-01-16

申请号：SG1999001144

申请日：1999-03-17

Applicant: JSP CORP

Inventor： SASAKI HIDEHIRO ,  SAKAGUCHI MASAKAZU ,  AKIYAMA MITSUHIRO ,  TOKORO HISAO

IPC: C08J9/18 ,  C08J9/22 ,  C08J9/228

Abstract: Disclosed herein are foamed and expanded beads of a polypropylene resin for molding, which comprise an uncrosslinked propylene random copolymer having a melting point of at least 140 DEG C. as a base resin, wherein the time required to attenuate an air pressure within the foamed beads applied by a pressurizing treatment with air from 1.2 kgf/cm2(G) to 0.8 kgf/cm2(G) under atmospheric pressure at 23 DEG C. is at least 80 minutes, and the CNI value of the foamed beads, which is defined by the following equation (1):CNI=log10[PwxEr DIVIDED (2.24xD3xB)](1)wherein Pw is an average weight (mg) per foamed bead, Er is a bulk expansion ratio (time) of the foamed beads, D is a cell diameter (mm) of the foamed beads, and B is a density of the base resin, is smaller than 3.80.

公开(公告)号：AU9515098A

公开(公告)日：1999-07-08

申请号：AU9515098

申请日：1998-12-01

Applicant: JSP CORP

Inventor： KOGURE NAOCHIKA ,  GOKURAKU KIROYUKI ,  NANAMA KIYOTAKA ,  KITAHAMA TAKASHI

IPC: E02D27/01 ,  A01M1/24 ,  B32B5/18 ,  B32B27/36 ,  E02D27/02 ,  E02D31/00 ,  E04B1/72 ,  E04B2/86

Abstract: Prevention of damage of wooden construction materials of a building by termites by laying one or more panels each having a polycarbonate resin foam layer on the ground on which the building is constructed or by arranging such panels on surfaces of continuous footing of the building or of vertical concrete walls of the building. The concrete wall may be formed using modular concrete form structure units each having a pair of opposing side panels, with each side panel having a polycarbonate foam layer.

公开(公告)号：CA2219016A1

公开(公告)日：1998-04-22

申请号：CA2219016

申请日：1997-10-17

Applicant: JSP CORP

Inventor： KOGURE NAOCHIKA ,  KITAHAMA TAKASHI ,  GOKURAKU HIROYUKI

IPC: C08J9/14

Abstract: Disclosed herein is a method for producing a foamed board based on a polystyrenic resin by foam-extruding a foamable composition obtained by incorporating a foaming agent into the polystyrenic resin, which comprises using, as a raw resin, a polystyrenic resin in which a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is at least 3.2, the z average molecular weight is at least 5 x 10 5, and the MFR is 1-10 g/10 min, or a polystyrenic resin in which a ratio (Mw/Mn) of the weight average molecular weight (Mw) to the number average molecular weight (Mn) is lower than 3.2, the z average molecular weight is at least 5 x 10 5, and a slope value of storage elastic modulus, G' at a circular frequency, .omega. within a range of from 10-1 to 10 1 (rad/sec) falls within a range of 0.8-1.2 as determined by dynamic viscoelasticity measurement in which vibrating strain is given under temperature conditions of 220.degree.C.

公开(公告)号：CA2024228C

公开(公告)日：1996-06-18

申请号：CA2024228

申请日：1990-08-29

Applicant: JSP CORP

Inventor： KUWABARA HIDEKI ,  TSURUGAI KAZUO ,  NAITO MASATO ,  SASAKI HIDEHIRO

IPC: C08J9/22 ,  C08J9/00 ,  C08J9/224 ,  C08J9/16

Abstract: A process for the production of expanded resin particles is disclosed, wherein an aqueous dispersion containing expandable particles of a polyolefin resin is discharged at a temperature higher than the softening point of the resin from a high pressure condition to a low pressure condition to expand the expandable particles and wherein the expandable particles contain fine particles of an inorganic material coated with an agent selected from isopropyltriisostearic titanate, tetraoctadecyl titanate, acetoalkoxyaluminum diisopropylates, stearic acid, methyltrimethoxysilane, methyltriethoxysilane, ethyltriethoxysilane, phenyltriethoxysilane and vinyltriethoxysilane.

公开(公告)号：DE69022814T2

公开(公告)日：1996-05-23

申请号：DE69022814

申请日：1990-11-24

Applicant: JSP CORP

Inventor： KUWABARA HIDEKI ,  SASAKI HIDEHIRO ,  NAITO MASATO ,  TURUGAI KAZUO

IPC: C08J9/228 ,  C08J9/22

Abstract: Prefoamed synthetic resin particles are produced by dispersing foamable resin particles in a dispersing medium within a closed vessel, said foamable resin particles containing a water-soluble inorganic substance and a blowing agent therein, and then releasing the foamable resin particles and the medium into an atmosphere of a pressure lower than that inside the vessel, whereby the thus-released foamable resin particles are allowed to undergo foaming.

公开(公告)号：CA2032719C

公开(公告)日：1994-11-08

申请号：CA2032719

申请日：1990-12-19

Applicant: JSP CORP ,  YUUGEN KAISHA NIKKU ,  IKEDA KAKO YK

Inventor： KAMIYAMA MAKOTO ,  NAKADA SHIGEO ,  IKEDA KOUJI ,  USUI HIROSHI ,  SASAKI KAZUTOSHI ,  YAMAMOTO HIROSHI

IPC: B29C33/38 ,  B29C44/44 ,  B29C44/58 ,  G06F11/28 ,  B29C35/04 ,  B29C33/40 ,  B29C67/20

Abstract: An expansion-molded article is produced by filling prefoamed thermoplastic particles in a mold cavity formed in combination of mold sections, through each of which plural heating medium holes are defined, and then feeding a heating medium such as steam through the holes to heat and fusion-bond the particles into the article conforming with the mold cavity. Each of the mold sections is covered by a permeable porous sheet at least over the heating medium holes on a side of the mold cavity.

公开(公告)号：CA2111139A1

公开(公告)日：1994-06-29

申请号：CA2111139

申请日：1993-12-10

Applicant: JSP CORP

Inventor： TOKORO HISAO ,  SHIOYA SATORU ,  HINOKAWA AKIRA

IPC: C08J9/00 ,  C08J9/18 ,  C08J9/228 ,  C08J9/16 ,  C08L23/00

Abstract: Disclosed herein is a method of producing foamed particles of a polyolefin resin, which are prevented from fusion-bonding among the particles upon their production, and exhibit excellent moldability without impeding fusion bonding property among the foamed particles upon their molding. The method includes dispersing the particles of the polyolefin resin along with a finely particulate silicate mineral as a dispersing agent and at least carbon dioxide as a foaming agent in a dispersion medium in a closed vessel, heating the dispersion to impregnate the resin particles with the foaming agent, and then releasing the resin particles and dispersion medium into an atmosphere of a pressure lower than the internal pressure of the vessel, thereby expanding the resin particles.