公开(公告)号：US20230271761A1

公开(公告)日：2023-08-31

申请号：US18040173

申请日：2021-08-18

Applicant: Denka Company Limited

Inventor： Keisuke NABA ,  Gosuke NAKAJIMA ,  Takanori ATSUSAKA ,  Hisatsugu TOKUNAGA

IPC: B65D75/28

CPC classification number: B65D75/28

Abstract: This cover tape has at least a base layer and a heat seal layer, wherein the heat seal layer contains a copolymer (A) of a styrene-based hydrocarbon and a conjugated diene-based hydrocarbon, the component (A) contains a block copolymer (A-1) of 10% by mass or more and less than 50% by mass of a styrene-based hydrocarbon and more than 50% by mass and 90% by mass or less of a conjugated diene-based hydrocarbon, and a block copolymer (A-2) of 50% by mass or more and 95% by mass or less of a styrene-based hydrocarbon and 5% by mass or more and 50% by mass or less of a conjugated diene-based hydrocarbon, a content of the component (A-1) is 35 to 60% by mass based on a total amount of the heat seal layer, and a mass ratio of the component (A-2) to the component (A-1) is 0.30 to 1.0.

公开(公告)号：US20230265317A1

公开(公告)日：2023-08-24

申请号：US18040064

申请日：2021-08-18

Applicant: Denka Company Limited

Inventor： Gosuke NAKAJIMA ,  Keisuke NABA ,  Takanori ATSUSAKA ,  Hisatsugu TOKUNAGA

IPC: C09J7/35 ,  H01L21/683 ,  C09J133/10

CPC classification number: C09J7/35 ,  C09J133/10 ,  H01L21/6836 ,  C09J2203/326

Abstract: This cover tape has at least a base layer and a heat seal layer, wherein the heat seal layer contains a polystyrene-based resin (A) and an ethylene-(meth)acrylic acid-based copolymer (B), and contents of the component (A) and the component (B) are more than 80 parts by mass and 95 parts by mass or less and 5 parts by mass or more and less than 20 parts by mass with respect to a total of 100 parts by mass of the component (A) and the component (B).

公开(公告)号：US20230272192A1

公开(公告)日：2023-08-31

申请号：US18006898

申请日：2021-08-18

Applicant: Denka Company Limited

Inventor： Kota SAWAGUCHI ,  Keisuke NABA ,  Gosuke NAKAJIMA

IPC: C08L9/06 ,  B32B27/30 ,  B32B27/32

CPC classification number: C08L9/06 ,  B32B27/302 ,  B32B27/32 ,  B32B27/308 ,  C08L2205/025 ,  C08L2205/035 ,  B32B27/36

Abstract: This cover tape has at least a base layer and a heat seal layer, wherein the heat seal layer has a loss tangent tan δ of less than 1 in a temperature range of 150° C. or less in a dynamic viscoelastic measurement at a measurement frequency of 1 Hz.