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公开(公告)号：JP2001139930A
公开(公告)日：2001-05-22
申请号：JP32551599
申请日：1999-11-16
Applicant: BRIDGESTONE CORP
Inventor： TOYOSAWA SHINICHI , NISHIMURO YOICHI , MASHITA NARUHIKO , MACHIDA KUNIO
Abstract: PROBLEM TO BE SOLVED: To obtain a gasket material directly bondable to a cover material, or the like, made of a metal without using an adhesive and good in adhesion to the cover material, or the like, by an injection molding. SOLUTION: This gasket material comprises (a) 100 pts.wt. of a styrene-based thermoplastic elastomer composed of a block copolymer, (b) 3-50 pts.wt. of an ethylene-(meth)acrylic acid copolymer or an ethylene-(meth)acrylic ester copolymer with 5-45 wt.% content of the (meth)acrylic acid and (c) 50-170 pts.wt. of a paraffinic oil.
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公开(公告)号：JP2001114976A
公开(公告)日：2001-04-24
申请号：JP29234599
申请日：1999-10-14
Applicant: BRIDGESTONE CORP
Inventor： NISHIMURO YOICHI , TOYOSAWA SHINICHI , MACHIDA KUNIO
Abstract: PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition which is excellent in sealing properties, is prevented from generating a gas such as a volatile low-mol.wt. component, and is suitable as a gasket material, especially as a gasket material for a hard disk unit. SOLUTION: This composition comprises (A) 100 pts.wt. hydrogenated block copolymer prepared by hydrogenating a block copolymer comprising at least one polymer block formed mainly from an aromatic vinyl compound and at least one polymer block formed mainly from a conjugated diene compound, (B) 50-1,000 pts.wt. nonaromatic softener having a kinematic viscosity (at 40 deg.C) of 100 mm2/sec or higher, and (C) 1-100 pts.wt. polymer which is a propylene homopolymer and/or a propylene copolymer formed mainly from propylene and which does not contain a lubricant or has been thermally treated.
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公开(公告)号：JP2001114975A
公开(公告)日：2001-04-24
申请号：JP29234399
申请日：1999-10-14
Applicant: BRIDGESTONE CORP
Inventor： NISHIMURO YOICHI , TOYOSAWA SHINICHI , MACHIDA KUNIO
Abstract: PROBLEM TO BE SOLVED: To provide a thermoplastic elastomer composition which is excellent in sealing properties and is prevented from generating a gas such as a volatile low-mol.-wt. component. SOLUTION: This composition comprises (A) 100 pts.wt. hydrogenated block copolymer prepared by hydrogenating a block copolymer comprising at least one polymer block formed mainly from an aromatic vinyl compound and at least one polymer block formed mainly from a conjugated diene compound, (B) 50-1,000 pts.wt. nonaromatic softener having a kinematic viscosity at 40 deg.C of 100 mm2/sec or higher, and (C) 1-100 pts.wt. polymer which is a propylene homopolymer and/or propylene copolymer formed mainly from propylene and has a melt flow rate (at 230 deg.C, under a load of 2.16 kgf, according to JIS K6758) of 20 g/10 min.
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公开(公告)号：JP2001108109A
公开(公告)日：2001-04-20
申请号：JP29234699
申请日：1999-10-14
Applicant: BRIDGESTONE CORP
Inventor： NISHIMURO YOICHI , TOYOSAWA SHINICHI , MACHIDA KUNIO
Abstract: PROBLEM TO BE SOLVED: To provide a gasket with a frame allowing reduction of generation of gas polluting a magnetic disk or the like when using an electronic apparatus, without providing a mechanism for removing the gas in an electronic apparatus body. SOLUTION: In this gasket with a frame wherein a frame body and a gasket are integrated, the frame body is made of a propylene homopolymer and/or a propylene copolymer mainly containing propylene not containing a lubricant or made of a heated propylene homopolymer and/or a heated propylene copolymer mainly containing propylene, while the gasket is made of an elastic material.
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公开(公告)号：JP2000199567A
公开(公告)日：2000-07-18
申请号：JP30628399
申请日：1999-10-28
Applicant: BRIDGESTONE CORP
Inventor： NISHIMURO YOICHI , TOYOSAWA SHINICHI , MACHIDA KUNIO
IPC: F16J15/10
Abstract: PROBLEM TO BE SOLVED: To enable an inexpensive, efficient and highly accurate production of a gasket with a cover having a complicated shape by constructing a cover of synthetic resin material while constructing a gasket of synthetic resin elastomer material, and integrating the cover body with the gasket. SOLUTION: As the synthetic resin forming a cover 1, resin such as stylene, olefin or polyamide resin is used while as the synthetic resin elastomer forming a gasket 2, thermoplastic elastomer such as of stylene, olefin, urethane or ester type is used. The integration of the cover body 1 with the gasket 2, i.e., integration of the synthetic resin with the synthetic resin elastomer is performed by the two color formation method or insert formation method. Since no metal material is used as the material of the cover body 1, the step of rust proof treatment is eliminated for light weightness, and an inexpensive, efficient and highly accurate production is made possible, and also recycling of the synthetic resin material is attained.
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Patent Agency Ranking
公开(公告)号：JPH10251559A
公开(公告)日：1998-09-22
申请号：JP5364597
申请日：1997-03-07
Applicant: BRIDGESTONE CORP
Inventor： TOYOSAWA SHINICHI , YAMAZAKI HIROTAKA , FUJIO RYOTA
Abstract: PROBLEM TO BE SOLVED: To provide an antifouling agent against aquatic organisms that has a large antifouling effect against aquatic organisms without anxiety of environmental pollution having high durability. SOLUTION: On at least one face of the supporting part 12, is formed a layer 14 of thermoplastic material that contains a macromolecular organic material and a softening agent, has a hardness A of 0-50 deg. according to JIS, permanent compression set of
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公开(公告)号：JPH10156990A
公开(公告)日：1998-06-16
申请号：JP31829196
申请日：1996-11-28
Applicant: BRIDGESTONE CORP , HONDA MOTOR CO LTD
Inventor： MASHITA SHIGEHIKO , TOYOSAWA SHINICHI , SUSA DAISUKE
Abstract: PROBLEM TO BE SOLVED: To provide a polymer material composite body of superior stability in which the control of spring characteristics is easy, the workability at the time of handling is good and no defects such as wears and creeps are generated. SOLUTION: A polymer material composite body 10 is formed by filling and curing a polymer blend material 22 in spaces 20 formed among fibers of a flexible sheet-shaped material 18 formed of two composite fiber layers 12 and 14 bonded together through cushioning threads 16. A low molecular material and a polymer organic material are contained in the above-referred polymer blend material 22, and the weight ratio between the low molecular material and the polymer organic material is 1.0 or more, and the polymer organic material is provided with a three-dimensional continuous network framework structure.
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公开(公告)号：JPH10119232A
公开(公告)日：1998-05-12
申请号：JP29455896
申请日：1996-10-16
Applicant: BRIDGESTONE CORP , BROTHER IND LTD
Inventor： FUKUDA TAISUKE , TOYOSAWA SHINICHI , TAIRA HIROSHI
Abstract: PROBLEM TO BE SOLVED: To obtain a stamp plate-making device capable of forming surely a high quality stamp without generating inferiority in process caused by a sag owing to puching of a printing material by a method wherein a surface of the printing material can be cleanly processed by processing surely and accurately the surface of the printing material without being influenced from environment and a relative size of a character. SOLUTION: In a stamp plate-making device for toys wherein a stamp 11 in which a printing material 3 capable of being processed with a thermal means is supported by being mounted on a support body 4, and a processing means 6 in which a surface of the printing material 3 of a stamp 31 is processed with a thermal means are provided, and the surface of the printing material 3 is partly melted with the processing means 6 based on an inputted process data to form an arbitrary printing image part on the surface of the printing material 3, a material constituting the printing material 3 is a microporous body composed of three dimensional continuous network skeleton obtained by removing a phthalate plasticizer after mixing syndiotactic 1, 2-polybutadiene and phthalate plasticizer, and a microporous body contains 5-35wt.% of the phthalate plasticizer.
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公开(公告)号：JPH09235477A
公开(公告)日：1997-09-09
申请号：JP4379296
申请日：1996-02-29
Applicant: BRIDGESTONE CORP
Inventor： MATSUSE TAKAHIRO , TOYOSAWA SHINICHI , FUKAHORI YOSHIHIDE
Abstract: PROBLEM TO BE SOLVED: To obtain a vibration-proof member excellent in vibration-proofness by using a thermoplastic material having specified compression set and loss tangent and by specifying the natural frequency of and the load applied to the member. SOLUTION: A hundred (100) pts.wt. hydrogenated styrene-ethylene/butylene- styrene block copolymer having an average mol.wt. of 150,000-400,000 is compounded with 40-500 pts.wt. softener (e.g. a naphthenic, paraffinic, or polyisobutylene oil) having an average mol.wt. of 450-5,000 and a solubility parameter different from that of the copolymer by 3.0 or lower, 10-250 pts.wt. polyphenylene ether resin, and if necessary an inorg. filler, a resin component (e.g. a polyolefin), a cross-linker, etc., and melt kneaded on a twin-screw extruder, etc., to give a thermoplastic material having a compression set (JIS 6301, at 70 deg.C) of 50% or lower and a loss tangent (at 25 deg.C and 5Hz) of 0.05 or higher. The material is molded into a desired shape to give a vibration-proof member which is used under a load of 0.1kgf or lower and has a natural frequency of 1-150Hz.
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公开(公告)号：JPH09205011A
公开(公告)日：1997-08-05
申请号：JP973496
申请日：1996-01-24
Applicant: BRIDGESTONE CORP
Inventor： OFUKU EIJI , TOYOSAWA SHINICHI
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic material which has a low hardness, capable of restraining compounded low-molecular material from bleeding, and excellent in magnetic properties. SOLUTION: A magnetic material comprises low-molecular material retaining composite composed of low-molecular material and medium material, high- molecular material, and magnetic powder. The low-molecular material contained in the above magnetic material has a viscosity of below 5×10 centi-poise at a temperature of 100 deg.C, a solubility parameter difference between the low- molecular material and the medium material is set lower than 3.0, the weight ratio of the low-molecular material to the medium material contained in the magnetic material is set above 1.0, a solubility parameter difference between the molecular material and the high-molecular material is rendered lower than 4.0, and the weight ratio of the low-molecular material to the high-molecular material contained in the magnetic material is set above 0.5.
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