US 2019/0241710 A1 · FILLER-CONTAINING FILM

Abstract

In a filler-containing film in which fillers are dispersed in a resin layer, a flow of the fillers caused by an unnecessary flow of the resin layer is suppressed during the pressure bonding of the filler-containing film and an article. This filler-containing film (10A) includes a filler-dispersed layer (3) in which fillers (1) are dispersed in a resin layer (2). The surface in the vicinity of the fillers (1) of the resin layer (2) has concavities (2b) and (2c) with respect to the tangent plane to the central portion of the surface of the resin layer (2) between adjacent fillers (1). The ratio (La/D) of a layer thickness La of the resin layer (2) to a particle diameter D of the filler (1) is preferably from 0.6 to 10.

Claims27

Dependent claims

A filler-containing film comprising

a filler-dispersed layer having fillers dispersed in a resin layer, a surface of the resin layer in a vicinity of the filler having a concavity with respect to a tangent plane to a central portion of the resin layer surface between adjacent fillers.

A method of producing a filler-containing film, the method comprising a step of forming a filler-dispersed layer in which fillers are dispersed in a resin layer, wherein

the step of forming a filler-dispersed layer comprises:
a step of allowing the fillers to be retained on a surface of the resin layer, and
a step of pushing the fillers retained on the surface of the resin layer into the resin layer;
in the step of allowing the fillers to be retained on a surface of the resin layer, the fillers are retained on the surface of the resin layer under a condition that the fillers are dispersed;
and
in the step of pushing the fillers into the resin layer, a viscosity of the resin layer, a pushing rate, or a temperature at which the fillers are pushed into is adjusted under a condition that the surface of the resin layer in a vicinity of the filler has a concavity with respect to a tangent plane to a central portion of the resin layer surface between adjacent fillers.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/333,200Filed 31 Aug 2017

Priority

JP 2016-17904213 Sep 2016

Published

8 Aug 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification50 codes

B32B 7/027
Physical, chemical or physicochemical properties: thermal properties
C08J 5/18
Manufacture of articles or shaped materials containing macromolecular substances: manufacture of films or sheets
B32B 27/08
As the main or only constituent of a layer, which is next to another layer of the same or of a different material: of synthetic resin
B32B 27/20
Characterised by the use of special additives: using fillers, pigments, thixotroping agents

Filler-containing film

Life of this patent

Filler-containing film

Life of this patent

Abstract

Claims27