Laminated body

Patent metadata

Field	Value
Publication number	US-9481147-B2
Application number	US-201314019820-A
Country	US
Kind code	B2
Filing date	Sep 6, 2013
Priority date	Sep 13, 2012
Publication date	Nov 1, 2016
Grant date	Nov 1, 2016

Abstract

A laminated body is provided that exhibits impact resistance, wear resistance and scratch resistance, and which enables a reduction in weight together with a reduction in the dielectric constant. The laminated body 100 includes a first tabular member 10 configured from a ceramic material and having a first thickness t 1 , and a second tabular member 20 configured from a polymer material and having a second thickness t 2 . The laminated body 100 withstands a falling-ball impact breaking test from a height that is higher than that exhibited by a single layer body that is configured from the ceramic material and of a thickness t 3 that is the sum of the first thickness t 1 and the second thickness t 2.

First claim

What is claimed is:

1. A laminated body comprising:
a main body including a first tabular member and a second tabular member, the first tabular member configured from a ceramic material and having a first thickness, the second tabular member configured from a polymer material and having a second thickness,
wherein the main body is configured to withstand a falling-ball impact breaking test from a height that is higher than a height exhibited by a single layer body which is configured from the ceramic material and of a thickness that is the sum of the first thickness and the second thickness;
wherein the first tabular member includes an outer surface, and
a neutral plane of the main body is separated by at least 0.8 times the first thickness from the outer surface;
wherein a distance of the neutral plane from the outer surface is given by the following equation;

P
=

∑

i
=
1

n

⁢

⁢

Yi
⁢

∫
Ai

⁢

y
⁢

⁢

ⅆ
A

/

∑

i
=
1

n

⁢

⁢
YiAi

;

and
wherein, in Equation 1, Yi denotes an average Young's modulus of the first tabular member and the second tabular member, and Ai denotes a multiple of the respective thickness and a width of the first tabular member and the second tabular member.

2. The laminated body according to claim 1 , wherein the first tabular member is at least 50 micrometers.

3. The laminated body according to claim 1 , wherein
an average Young's modulus of the first tabular member is larger than an average Young's modulus of the second tabular member.

4. The laminated body according to claim 1 , wherein the first tabular member is configured by at least one of zirconia and alumina.

5. The laminated body according to claim 1 , wherein
the second tabular member comprises a flexible supporting layer and a bonding layer which is interposed between the supporting layer and the first tabular member.

6. The laminated body according to claim 5 , wherein
the supporting layer is configured by a fiber reinforced plastic.

7. The laminated body according to claim 1 , wherein
the main body configured to have static load characteristics that are lower than the single layer body of the thickness that is the sum of the first thickness and the second thickness.

Assignees

• Ngk Insulators Ltd

Inventors

• Kaku Takeshi
• Tanaka Hidehiko
• Shibata Kazuyoshi
• Shimizu Hideki

Classifications

• B32B2307/54

  Yield strength; Tensile strength · CPC title

• B32B7/12

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

• B32B2260/023

  Two or more layers · CPC title

• B32B2262/106

  Carbon fibres, e.g. graphite fibres · CPC title

• C04B2237/343

  Alumina or aluminates · CPC title