Ceramic laminate sheet with flexibility and preparation method thereof

Patent metadata

Field	Value
Publication number	US-9640304-B2
Application number	US-201313939905-A
Country	US
Kind code	B2
Filing date	Jul 11, 2013
Priority date	Jul 12, 2012
Publication date	May 2, 2017
Grant date	May 2, 2017

Abstract

Disclosed is a ceramic laminate sheet comprising a ceramic sheet having a plurality of cracks and a polymer resin layer disposed on one side or both sides of the ceramic sheet, wherein the plurality of cracks pass through the ceramic sheet from one side to the other side thereof, the cracks divide the ceramic sheet into a plurality of pieces, grooves for formation of the cracks are not provided in one side and the other side of the ceramic sheet.

First claim

What is claimed is:

1. A method for preparing a ceramic laminate sheet comprising the steps of:
(a) forming a polymer resin layer on one side or both sides of a sintered ceramic sheet to obtain a laminate sheet; and
(b) forming a plurality of cracks in the ceramic sheet by pressurizing the laminate sheet to divide the ceramic sheet into a plurality of pieces, wherein the plurality of cracks are disposed in at least two directions crossing each other,
wherein
(i) the step (a) of forming the polymer resin layer and the step (b) of forming the cracks are performed simultaneously through a roll lamination process;
(ii) the number of the plurality of pieces formed is in the range of 350 to 950 per unit area of cm 2 of the ceramic sheet;
(iii) the pressurizing in step (b) is performed at least two times by allowing the laminate sheet to pass between a pressure roller and an elastic roller, firstly in a processing direction X and secondly in a direction Y perpendicular to the processing direction X;
(iv) grooves for formation of the cracks are not provided in both sides of the ceramic sheet; and
(v) an average space between parallel cracks of the plurality of cracks is in the range of 300 μm to 600 μm.

2. The method of claim 1 , wherein the step (b) of forming the cracks is performed three times to form additional cracks in the ceramic laminate sheet by additionally passing the laminate sheet under the pressure roller in the direction XY diagonal to the processing direction X, followed by passing the laminate sheet under the pressure roller in another direction X-Y diagonal to the processing direction X.

Assignees

• Skc Co Ltd
• Skc Co Ltd

Inventors

• Yoo Il Hwan
• Kim Jin Cheol
• Kim Tae Kyoung
• Lee Dong Gyu
• Lee Yu Jin

Classifications

• B32B18/00

  Layered products essentially comprising ceramics, e.g. refractory products · CPC title

• B32B7/12

  using interposed adhesives or interposed materials with bonding properties · CPC title

• B32B27/304

  comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF · CPC title

• B32B27/32

  comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} · CPC title

• C04B2237/62

  Forming laminates or joined articles comprising holes, channels or other types of openings · CPC title