公开(公告)号：US20240042745A1

公开(公告)日：2024-02-08

申请号：US18258850

申请日：2021-12-23

Applicant: TOPPAN INC. ,  TAMAPOLY CO., LTD.

Inventor： Kazuyoshi RO ,  Akinori SAKURAI

IPC: B32B27/08 ,  B32B27/32 ,  B32B7/02 ,  B32B7/12 ,  B65D65/40 ,  B65D75/00 ,  B32B27/40

CPC classification number: B32B27/08 ,  B32B27/32 ,  B32B7/02 ,  B32B7/12 ,  B65D65/40 ,  B65D75/008 ,  B32B27/40 ,  B32B2307/7376 ,  B32B2250/24 ,  B32B2439/46 ,  B32B2270/00 ,  B32B2307/748

Abstract: A laminate including, a base material layer; a first polyethylene resin layer containing a first polyethylene resin and having a melt flow rate of less than 5 g/10 minutes, and a second polyethylene resin layer containing a second polyethylene resin and having a melt flow rate of 5 to 12 g/10 minutes, in this order, in which a ratio R2 (Mw/Mn) of a weight-average molecular weight Mw to a number average molecular weight Mn of the second polyethylene resin is 7 or less.

公开(公告)号：US11914297B2

公开(公告)日：2024-02-27

申请号：US17251265

申请日：2019-06-17

Applicant: TAMAPOLY CO., LTD.

Inventor： Shinichi Oya ,  Toshiaki Hagiwara ,  Hitoshi Nakamura

IPC: G03F7/11 ,  B32B27/08 ,  B32B27/32 ,  C08J5/18 ,  C08L23/06 ,  G03F7/09

CPC classification number: G03F7/11 ,  B32B27/08 ,  B32B27/32 ,  C08J5/18 ,  C08L23/06 ,  G03F7/094 ,  B32B2255/10 ,  B32B2307/20 ,  C08J2423/06 ,  C08L2203/16 ,  C08L2207/066

Abstract: A cover film for dry film resist, includes a polyethylene film including a first mixture of high pressure low density polyethylene (LDPE) and linear low density polyethylene (LLDPE). The first mixture has an LDPE to LLDPE ratio by mass of from 90:10 to 60:40. The polyethylene film is free of a plasticizer, anti-blocking agent, slipping agent, and anti-static agent. The number of fish eyes having a minimum diameter of 0.2 mm or greater present in 100 m2 of the 19 μm thick cover film in plan view is at most two. The polyethylene film has a thickness of from 10 to 20 μm and a haze value of from 12 to 25%.

公开(公告)号：US20210271167A1

公开(公告)日：2021-09-02

申请号：US17251265

申请日：2019-06-17

Applicant: TAMAPOLY CO., LTD.

Inventor： Shinichi OYA ,  Toshiaki HAGIWARA ,  Hitoshi NAKAMURA

IPC: G03F7/11 ,  C08J5/18 ,  C08L23/06 ,  G03F7/09 ,  B32B27/08 ,  B32B27/32

Abstract: A cover film for dry film resist, includes a polyethylene film including a first mixture of high pressure low density polyethylene (LDPE) and linear low density polyethylene (LLDPE). The first mixture has an LDPE to LLDPE ratio by mass of from 90:10 to 60:40. The polyethylene film is free of a plasticizer, anti-blocking agent, slipping agent, and anti-static agent. The number of fish eyes having a minimum diameter of 0.2 mm or greater present in 1.9 m3 of the cover film in plan view is at most two. The polyethylene film has a thickness of from 10 to 20 μm and a haze value of from 12 to 25%.