公开(公告)号：US20210347094A1

公开(公告)日：2021-11-11

申请号：US17274261

申请日：2019-09-06

Applicant: KURARAY CO., LTD.

Inventor： Osamu Kazeto ,  Takashi Nerio ,  Masahiro Takafuji

IPC: B29C33/68

Abstract: Disclosed is a mold release film that is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, and then solidified and molded. The mold release film is a polyvinyl alcohol film and is characterized by being a polyvinyl alcohol mold release film for artificial marble molding use that satisfies the following formula (1). Due to this, it is possible to provide a polyvinyl alcohol mold release film for artificial marble molding use capable of, even in the production of wide artificial marble, suppressing wrinkles or curls generated at both end parts to prevent the surface shape of the resulting artificial marble from being defective, and simplifying the step of grinding and polishing artificial marble, and a method for producing artificial marble using the same. 4.6×10−3≥Δn(MD)0−1.4×10−3≥Δn(TD)0≥1.0×10−3  (1) in the formula (1), Δn(MD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the machine direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film, and Δn(TD)0 represents a value determined from a birefringence index of the polyvinyl alcohol mold release film in the transverse direction at the center part of the transverse direction of the film by averaging the birefringence index along the thickness direction of the film.

公开(公告)号：US10576777B2

公开(公告)日：2020-03-03

申请号：US15571068

申请日：2016-06-14

Applicant: KURARAY CO., LTD.

Inventor： Akio Nishimi ,  Masahiro Takafuji ,  Takashi Nerio ,  Satoru Fujita

IPC: B44C1/17 ,  B44C1/175 ,  C08K3/34 ,  C08K7/08 ,  C08L29/04 ,  C08J5/18 ,  C08K7/10 ,  C08K3/22 ,  C08K5/053

Abstract: Provided are a single-layered hydraulic transfer printing base film, including 1.5 to 15 parts by mass of a plate or needle filler with an average particle diameter of from 2 to 14 μm and an aspect ratio of from 4 to 60 based on 100 parts by mass of polyvinyl alcohol and a method of producing a hydraulic transfer printing base film, including forming a film using a liquid containing 1.5 to 15 parts by mass of a plate or needle filler with an average particle diameter of from 2 to 14 μm and an aspect ratio of from 4 to 60 based on 100 parts by mass of polyvinyl alcohol. A hydraulic transfer printing base film that is not easily broken when fed from a roll and a method of producing the base film are thus provided.

公开(公告)号：US11883988B2

公开(公告)日：2024-01-30

申请号：US17274261

申请日：2019-09-06

Applicant: KURARAY CO., LTD.

Inventor： Osamu Kazeto ,  Takashi Nerio ,  Masahiro Takafuji

IPC: B29C33/68

CPC classification number: B29C33/68

Abstract: Disclosed is a mold release film that is to be placed between a stock solution that serves as a raw material for artificial marble and a shaping apparatus when the stock solution is fed to the shaping apparatus, and then solidified and molded.