公开(公告)号：US20220306904A1

公开(公告)日：2022-09-29

申请号：US17637268

申请日：2020-09-24

Applicant: DENKA COMPANY LIMITED

Inventor： Yoshiaki YAMAMOTO ,  Akiyoshi KIMURA ,  Yosuke TATE ,  Toshikatsu MITSUNAGA

IPC: C09J7/35 ,  C09J125/10 ,  C09J5/06 ,  C09J11/08

Abstract: A hot melt adhesive composition which can realize moderate adhesive strength with respect to the adherend when porous substrate is used, the composition, including: a styrene-based block copolymer; a tackifier; and a plasticizer; wherein: the styrene-based block copolymer is a styrene-butadiene block copolymer and a butadiene portion thereof is partially hydrogenated; the tackifier is contained by 65 to 190 parts by mass with respect to 100 parts by mass of the styrene-based block copolymer; and the plasticizer is contained by 0.1 to 24 parts by mass with respect to 100 parts by mass of the styrene-based block copolymer.

公开(公告)号：US20240287359A1

公开(公告)日：2024-08-29

申请号：US18573705

申请日：2022-07-04

Applicant: DENKA COMPANY LIMITED

Inventor： Akiyoshi KIMURA ,  Yoshiaki YAMAMOTO ,  Daisuke YOSHIMURA

IPC: C09J153/02 ,  C09J7/38

CPC classification number: C09J153/025 ,  C09J7/387 ,  C09J2301/16 ,  C09J2301/302 ,  C09J2301/312 ,  C09J2301/408 ,  C09J2301/414 ,  C09J2301/50 ,  C09J2453/00 ,  C09J2493/00

Abstract: An adhesive tape includes an adhesive layer containing an adhesive composition, wherein: the adhesive composition contains a styrene-butadiene-based block copolymer and first, second, and third tackifiers; a butadiene portion of the styrene-butadiene-based copolymer is partially hydrogenated; a content of a styrene-derived monomer unit of the styrene-butadiene-based copolymer is 24 mass % or more; in GPC measurement, the styrene-butadiene-based copolymer contains a component (a) having a peak top molecular weight of between 200000 and 400000, and a component (b) having a peak top molecular weight of between 100000 and 200000; the first tackifier is a terpene-based resin which is liquid at 23° C.; the second tackifier has a softening point of 70 to 120° C.; the third tackifier is a terpene phenolic resin having a softening point of 140° C. or higher; and the adhesive tape includes a nonwoven fabric coated with the adhesive composition by hot-melt coating, the nonwoven fabric containing rayon.

公开(公告)号：US20220325141A1

公开(公告)日：2022-10-13

申请号：US17641544

申请日：2020-09-15

Applicant: Denka Company Limited

Inventor： Yosuke TATE ,  Akiyoshi KIMURA ,  Yoshiaki YAMAMOTO ,  Daisuke YOSHIMURA

IPC: C09J7/21 ,  G10K11/162

Abstract: A binding tape exhibits high sound absorbing performance and suppressed breaking of the tape during the binding work. The binding tape includes a substrate layer of a nonwoven fabric and an adhesive layer that contains an adhesive and that is provided on at least either surface of the substrate layer, where: the nonwoven fabric is formed from fibers at least partially containing a thermoplastic elastomer; and the nonwoven fabric has a tensile breaking strength in the tape longitudinal direction (A1) of 20 N/10 mm or more.

公开(公告)号：US20240228836A1

公开(公告)日：2024-07-11

申请号：US18573849

申请日：2022-07-04

Applicant: DENKA COMPANY LIMITED

Inventor： Akiyoshi KIMURA ,  Yoshiaki YAMAMOTO ,  Daisuke YOSHIMURA

IPC: C09J109/06 ,  C09J11/08

CPC classification number: C09J109/06 ,  C09J11/08

Abstract: An adhesive tape includes an adhesive layer containing an adhesive composition, wherein: the adhesive composition contains a styrene-butadiene-based block copolymer, a first tackifier, a second tackifier, and a third tackifier; a butadiene portion of the styrene-butadiene-based block copolymer is partially hydrogenated; the first tackifier is at least one of a rosin ester which is liquid at 23° C. and a terpene-based resin which is liquid at 23° C.; the second tackifier has a softening point of 70 to 120° C.; the third tackifier has a softening point of 140° C. or higher; holding force of the adhesive tape at 70° C. based on JIS Z0237 is 100 minutes or more; a melt viscosity of the adhesive composition at 200° C. is 100000 cp or lower.