公开(公告)号：JP2000117867A

公开(公告)日：2000-04-25

申请号：JP29596398

申请日：1998-10-19

Applicant: BRIDGESTONE CORP

Inventor： KINOSHITA HIDEYA ,  YAMAMOTO YASUSHI

IPC: B32B5/18 ,  B29C65/02 ,  B29K23/00 ,  B29K67/00 ,  B29K75/00 ,  B29K105/04 ,  B29L9/00 ,  B29L31/58 ,  B32B27/40

Abstract: PROBLEM TO BE SOLVED: To deal with a requirement for non-yellowing without impairing the air permeability by setting the air-permeability of a skin-fabricated cushioning body obtained by laminating a film material to the surface of a cushioning body material with air permeability by thermal fusion-bonding, in a specific ration to the air-permeability before forming a coat. SOLUTION: This cushioning body is a skin-fabricated cushioning body obtained by laminating a film material on the surface of a cushioning body material with air-permeability by thermal fusion-bonding. The air-permeability of the skin-fabricated cushioning body accounts for at least 50% or more of the proper air-permeability of the cushioning body material before forming a coat. In addition, the cushioning body with at least 50 cc/cm2/sec or more air-permeability for an air permeating amount measured by the Frazier testing machine (JIS-0000) in a practical use, is converted to a cushioning body with a coat fabricated so that a surface film has an appropriate air-permeability, i.e., an appropriate hole by selecting between thermal fusion-bonding conditions.

公开(公告)号：JP2000095838A

公开(公告)日：2000-04-04

申请号：JP26993298

申请日：1998-09-24

Applicant: BRIDGESTONE CORP

Inventor： KINOSHITA HIDEYA ,  YAMAMOTO YASUSHI

IPC: C08J9/00 ,  C08G18/00 ,  C08G18/82 ,  C08G101/00 ,  C08K5/13 ,  C08L75/04

Abstract: PROBLEM TO BE SOLVED: To prevent change in color of NOx and change in color of migration of a non-rigid polyurethane foam containing BHT (dibutylcresol) as an antioxidant in a polyurethane raw material. SOLUTION: This non-rigid polyurethane foam has a BHT content in the non-rigid polyurethane foam of

公开(公告)号：JP2000053790A

公开(公告)日：2000-02-22

申请号：JP22723698

申请日：1998-08-11

Applicant: BRIDGESTONE CORP

Inventor： KINOSHITA HIDEYA ,  YAMAMOTO YASUSHI

IPC: C08J9/02 ,  C08G18/18 ,  C08G101/00 ,  C08L75/04

Abstract: PROBLEM TO BE SOLVED: To obtain a flexible polyurethane foam sustainably improved in non- discoloration as an undecided matter of many years and prevented from odor or eye-rainbow phenomena as well. SOLUTION: This flexible polyurethane foam is obtained by reaction between a polyol and a polyisocyanate in the presence of water a foam stabilizer, catalysts, and other auxiliary(ies); wherein the polyisocyanate to be used is an aliphatic or alicyclic isocyanate, and the catalysts to be used consist of a metal catalyst and an amine catalyst in combination, the former being a tin-based catalyst, while the latter dimethylaminoethyl ether.

公开(公告)号：JP2000052525A

公开(公告)日：2000-02-22

申请号：JP22716098

申请日：1998-08-11

Applicant: BRIDGESTONE CORP

Inventor： KINOSHITA HIDEYA ,  YAMAMOTO YASUSHI

IPC: B32B27/40

Abstract: PROBLEM TO BE SOLVED: To delay and upgrade discoloration properties of an urethane foam by setting all color difference changes before and after an ultraviolet test, an Nox test, a heat test and a wet heat test under predetermined conditions of a cushioning material to specific values or less. SOLUTION: A film is laminated on one surface of a soft polyurethane foam to constitute the cushioning material. A numeric value for evaluating discoloration properties of the material is set to 7 or less for all color difference changes before and after an ultraviolet test at the time of conducting an ultraviolet ray illumination for 9 hours by using a carbon arc 1 lamp by a fade meter an Nox test at the time of exposure of a sample for two hours with 500 ppm Nox gas, a heat test at the time of heating a sample for two hours at 120 deg.C, and a wt heat test at the time of heating a sample for five days under conditions of 70 deg.C and 95% R.H.

公开(公告)号：JPH101527A

公开(公告)日：1998-01-06

申请号：JP15358896

申请日：1996-06-14

Applicant: BRIDGESTONE CORP

Inventor： YAMAMOTO YASUSHI ,  YASUNAGA KUNIAKI

IPC: C08J9/02 ,  C08G18/48 ,  C08G101/00

Abstract: PROBLEM TO BE SOLVED: To obtain a low-density, low-air-permeability flexible polyurethane foam having an elongation at break of at least a specified value by reacting a specific polyether polyol with an isocyanate in the presence of water and a catalyst. SOLUTION: A flexible polyurethane foam having an elongation at break of 200% or higher and an air permeability of 50ml/cm /sec or lower is obtd. by reacting a polyol of which the average number of carbon atoms of the straight chain part is 40-65 with an isocyanate (e.g. tolylene diisocyanate) in the presence of water and a catalyst (e.g. triethylenediamine). The foam may further contain a flame retardant, an antioxidant, an ultraviolet absorber, a foam stabilizer, etc. The obtd. foam can be suitably used not only for a waist band, a side band, etc., of a paper diaper but also as a foam for flame lamination used for an automotive interior part.