公开(公告)号：JPH0615840A

公开(公告)日：1994-01-25

申请号：JP19909392

申请日：1992-07-02

Applicant: BRIDGESTONE CORP

Inventor： YASUNAGA KUNIAKI ,  HASEGAWA HAJIME

IPC: B41J2/175

Abstract: PURPOSE:To provide an ink holding member used in the supply of ink to a printing head. CONSTITUTION:In the ink holding member composed of urethane foam inserted in an ink supply container, the urethane foam has a volume swelling ratio of 5-60% with respect to ink. Even when the urethane foam whose volume is slightly smaller than the inner volume of the container is inserted, the urethane foam is swollen by the ink when the container is filled with the ink and the container is uniformly filled with the urethane foam. Therefore, even when the container is shaken, the ink in the container can be always discharged from a discharge port by constant quantity without being sloshed.

公开(公告)号：JPS61291673A

公开(公告)日：1986-12-22

申请号：JP13285385

申请日：1985-06-17

Applicant: BRIDGESTONE CORP

Inventor： HASEGAWA HAJIME ,  HORIE MASAFUMI ,  AOKI MASAMI ,  FUKUDA HIROYA ,  DOBASHI MASASHI

IPC: F16J15/10 ,  C09K3/10

Abstract: PURPOSE:To titled sealing material, obtained by impregnating a nonrigid polyurethane foam having specific physical properties with a fluorine-containing hydrocarbon based water repellent, capable of ensuring improved water stopping properties with a small amount of the water repellent, readily producible and having good handleability. CONSTITUTION:A sealing material obtained by impregnating a nonrigid polyurethane foam having >=40 cells based on 25mm length, sec quantity of air flow at 10mm thickness and =1), formula II (n is >=1; m is >=1) or formula III (n is >=1; m is >=3; x is >=5).

公开(公告)号：JPH1195541A

公开(公告)日：1999-04-09

申请号：JP25525197

申请日：1997-09-19

Applicant: BRIDGESTONE CORP

Inventor： ACHIHA KOJI ,  HASEGAWA HAJIME

IPC: G03G15/08 ,  F16C13/00

Abstract: PROBLEM TO BE SOLVED: To obtain such a roller having low hardness that a developer permeating into the roller is easily moved and diffused and that carrying property of a developer is improved by controlling the average roughness of the surface of an elastic layer comprising a formed body to

公开(公告)号：JPH1124585A

公开(公告)日：1999-01-29

申请号：JP19316297

申请日：1997-07-03

Applicant: BRIDGESTONE CORP

Inventor： SUGIMACHI MASATO ,  HASEGAWA HAJIME ,  TANUMA ITSUO

IPC: G09F9/00

Abstract: PROBLEM TO BE SOLVED: To obtain the back light which has high luminance and high uniformity whose structure is simple and which is easily manufactured without necessitating complicated man-hour for assembly by forming at least the inner surface of a light transmission plate and a fluorescent tube from a light reflecting material and housing them at the inside of a case where a part opposed to a light emission surface is opened. SOLUTION: This back light is an edge light type back light in which the fluorescent tube 2 is disposed on the side of one end surface 1a of the light transmission plate 1, and the light of the fluorescent tube 2 is made incident at the inside of the light transmission plate 1 from one end surface 1a and the incident light is emitted from the light emission surface 1b of the light transmission plate 1. At least the inner surfaces of the light transmission plate 1 and the fluorescent tube 2 are formed from the light reflecting material, and are housed in the inside of the case 3 where the part opposed to the light emission surface 1b is opened. Then, the light transmission plate 1 constituted of a transparent resin, where the light reflecting material, for instance, light reflecting paint is dot-printed on the rear surface 1c on the opposite side to the light emission surface 1b for the purpose of uniformizing in-plane luminance distribution, is used.

公开(公告)号：JPH1036543A

公开(公告)日：1998-02-10

申请号：JP18965496

申请日：1996-07-18

Applicant: BRIDGESTONE CORP

Inventor： KINOSHITA HIDEYA ,  YAMAGUCHI NORIYUKI ,  HASEGAWA HAJIME

IPC: C08J9/02 ,  C07C269/00 ,  C08G18/18

Abstract: PROBLEM TO BE SOLVED: To obtain a flexible polyurethane foam developing no scorch even if incorporated with no discoloration-proofing agent, and having further excellent nonyellowability, by reaction between a polyol and an aliphatic or alicyclic polyisocyanate in the presence of a combination of specific two kinds of catalyst. SOLUTION: This flexible polyurethane foam is obtained by subjecting a system described below to reaction. The system is composed of (A) a polyol (e.g. polyether polyol), (B) an aliphatic or alicyclic polyisocyanate (pref. 3- isocyanatomethyl 3,5,5-trimethylhexyl isocyanate), (C) a tin-based catalyst as metallocatalyst (e.g. stannous octoate) and (D) a tertiary amine catalyst as amine-based catalyst (pref. dimethylaminoethyl ether or triethylenediamine) [and a conventional amidino group-bearing amine, pref. 1,8-diazabicyclo(5,4,0) undecene-7], (E) water, (F) a foam stabilizer, and (G) other auxiliary(ies).

公开(公告)号：JPH08217846A

公开(公告)日：1996-08-27

申请号：JP2209395

申请日：1995-02-09

Applicant: BRIDGESTONE CORP

Inventor： USAMI KAZUYOSHI ,  YAMAGUCHI NORIYUKI ,  HASEGAWA HAJIME

IPC: C08J9/02 ,  C08G18/18 ,  C08G18/48 ,  C08J9/14 ,  C08K5/521 ,  C08L75/00 ,  C08L75/08

Abstract: PURPOSE: To obtain the low-staining and flame-retardant polyurethane foam little in a fogging phenomenon and in the discoloration of the foam ground, and useful for furnitures, etc., by using a polyol, a polyisocyanate, water, a metal catalyst, an amine catalyst and a halogen-free flame retardant. CONSTITUTION: This low staining and flame retardant polyurethane foam is produced from (A) a polyol such as a polyesterpolyol, (B) a polyisocyanate such as tolylene diisocyanate, (C) water, (D) a foaming agent such as trichlorofluoromethane, (E) a metal catalyst such as cuprous octenate, (F) an amine catalyst having one or more functional groups, such as dimethylaminohexanol, and (G) a halogen-free flame retardant such as a tricresylphosphate of the formula (R1 -R3 are H, alkyl). The components G and F are used in amounts of 1-40 pts.wt. and 0.1-2 pts.wt., respectively, based on 100 pts.wt. of the component A.

公开(公告)号：JPH0833554A

公开(公告)日：1996-02-06

申请号：JP17456894

申请日：1994-07-26

Applicant: BRIDGESTONE CORP

Inventor： NAITO MASARU ,  KASUKAWA HIROKI ,  HASEGAWA HAJIME

IPC: A47H1/04 ,  A47H15/04

Abstract: PURPOSE:To lower sounds generated when a curtain is opened or closed by fastening a foaming sheet having a smooth skin layer on the surface thereof with a specified expansion ratio (low expansion ratio) on a running surface on which wheels run to hang the curtain. CONSTITUTION:A curtain rail made up of a combination of a curtain rail frame 1 and a plurality of wheels 2 to hang a curtain in the frame 1 is provided with a urethane foam (1mm thick) with a surface skin as skin layer at the part of a running surface 3 to function as soundproof layer. The polyurethane foam sheet has an expansion ratio two to ten fold, preferably two to five fold and obtained by mixing bubble by a mechanical agitation. The apparent density of the sheet herein used is 0.2-0.6g/cm , the hardness under a compression load of 25%, 0.2-4.5kg/cm , the cell diameter, 200mum or less and the friction coefficient by ASTM-D1894, 0.8-3.0.

公开(公告)号：JPH06330021A

公开(公告)日：1994-11-29

申请号：JP14297693

申请日：1993-05-21

Applicant: BRIDGESTONE CORP

Inventor： HASEGAWA HAJIME ,  USAMI KAZUYOSHI

IPC: C08G18/62 ,  C08G18/69 ,  C08J9/06 ,  C08J9/30 ,  C09K3/10

Abstract: PURPOSE:To produce a sealant excellent in lightweight properties and reduction of the amount of a filler required for filling a gap and useful for filling a gap of a pillar part of an automobile by thermosetting a molded foam prepared from a specified foam composition at a specified temperature. CONSTITUTION:The objective sealant thermally expandable and capable of filling a gap thereby is produced by uniformly dispersing an inert gas into a liquid composition containing (A) a compound having two or more active hydrogens, (B) an organic polyisocyanate compound, (C) a foam stabilizer and (D) a foaming agent with mechanical stirring, molding the resultant foam composition and thermosetting the molded foam at a temperature lower than the decomposition temperature of the component (D). In addition, as the component (A) in the objective sealant, a polydiene-based polyol or a polyolefin-based polyol respectively having OH at the terminal is preferably used in an amount of >=50 pts.wt. based on 100 pts.wt. component (A).

公开(公告)号：JPH06107836A

公开(公告)日：1994-04-19

申请号：JP22477292

申请日：1992-07-31

Applicant: BRIDGESTONE CORP

Inventor： YASUNAGA KUNIAKI ,  HASEGAWA HAJIME

IPC: B41J2/175 ,  C08G18/48 ,  C08G18/63 ,  C08G101/00 ,  C08J9/02

Abstract: PURPOSE:To provide a polyurethane foam for an ink holder which is put into an ink tank of a recording apparatus. CONSTITUTION:A polyether polyurethane foam for an ink holder having a cell size of 80-400mum is produced by mixing a polyether polyol having a viscosity of 1,500-3,000cP, an isocyanate compd., a foam stabilizer, a catalyst, etc., and by introducing the main ingredients simultaneously into a mixing head. obtd. polyether polyurethane foam has fine cells suitable for an ink holder.

公开(公告)号：JPH0270719A

公开(公告)日：1990-03-09

申请号：JP15463688

申请日：1988-06-24

Applicant: BRIDGESTONE CORP

Inventor： ISHIWAKA TAKUMI ,  HASEGAWA HAJIME ,  OHASHI TAKASHI

IPC: C08J9/04 ,  C08G18/00 ,  C08G18/32 ,  C08G18/40 ,  C08G18/65 ,  C08J9/00 ,  C08K5/34 ,  C08K5/3492 ,  C08L75/00 ,  C08L75/04

Abstract: PURPOSE:To improve flame retardance and physical properties by reacting a specific polyhydroxyl compd. with a polyisocyanate in the presence of a blowing agent and a melamine powder as a flame retardant. CONSTITUTION:5-30wt.% aldehyde condensation product obtd. by reacting an aldehyde with a compd. condensation-polymerizable with said aldehyde is dispersed in a polyhydroxyl compd. (e.g., polyoxyethylenepropylenetriol). The resulting dispersion is reacted with a polyisocyanate (e.g., tolylene diisocyanate) in an equivalent ratio of said polyisocyanate to said dispersion of 0.95-1.20 in the presence of a blowing agent, 5-100pts.wt. (based on 100pts.wt. said dispersion) melamine powder as a flame retardant, a required amt. of a catalyst, etc.