Laminate production method

Patent metadata

Field	Value
Publication number	US-11850772-B2
Application number	US-201816632141-A
Country	US
Kind code	B2
Filing date	Jul 24, 2018
Priority date	Jul 27, 2017
Publication date	Dec 26, 2023
Grant date	Dec 26, 2023

Abstract

A method for producing a laminate including a substrate and a rubber layer, the rubber layer having a thickness of 200 μm or more from the surface of the substrate, the method including contacting the substrate in a heated state with a polymer latex having a viscosity of 2,000 to 100,000 mPa·s at 25° C. to thereby coagulate the polymer in contact therewith to form the rubber layer.

First claim

The invention claimed is:

1. A method for producing a laminate comprising a substrate and a rubber layer, the rubber layer having a thickness of 200 μm or more from a surface of the substrate, the method comprising:
contacting the substrate in a heated state with a polymer latex having a viscosity of 2,000 to 100,000 mPa·s at 25° C. to thereby coagulate the polymer latex in contact therewith to form the rubber layer, only once,
wherein a polymer contained in the polymer latex is a nitrile rubber;
the polymer latex contains a heat-sensitive coagulant; and
the method does not include a step of contacting the substrate with a coagulant solution before contacting the substrate with the polymer latex.

2. The method for producing the laminate according to claim 1 , wherein in the contacting with the polymer latex, the substrate is heated at 30° C. or higher.

3. The method for producing the laminate according to claim 1 , wherein in the contacting with the polymer latex, the substrate is heated at 50° C. or higher.

4. The method for producing the laminate according to claim 1 , wherein the thickness of the substrate is 0.01 to 3,000 mm, and the permeation thickness of the rubber layer into the substrate is 1 μm or more and less than the thickness of the substrate.

5. The method for producing the laminate according to claim 1 , wherein the polymer latex contains a nonionic surfactant.

6. The method according to claim 1 , wherein the heat-sensitive coagulant is a silicone oil or a fluoroalkyl ester polymer.

7. The method according to claim 1 , wherein a temperature of the substrate when the substrate contacts the polymer latex is between 50° C. and 90° C.

8. The method according to claim 1 , wherein the viscosity of the polymer latex when the substrate contacts the polymer latex is 11,000 to 100,000 mPa·s at 25° C.

9. A method for producing a protective glove using the laminate obtained by the method according to claim 1 .

Assignees

• Zeon Corp

Inventors

• Hayasaka Kentaro
• Akabane Tetsuya
• Makino Kunihiko

Classifications

• B29C41/20 Primary

  incorporating preformed parts or layers, e.g. moulding inserts or for coating articles · CPC title

• A41D19/01505

  resistant to mechanical aggressions, e.g. cutting. piercing · CPC title

• B29C41/14

  Dipping a core {(B29C41/10 takes precedence)} · CPC title

• B32B5/02

  characterised by structural features of a {fibrous or filamentary} layer {(layer formed of metallic wires B32B15/02; layer formed of natural mineral fibres B32B19/02; layer formed of wood fibres B32B21/02)} · CPC title

• B32B25/10

  next to a fibrous or filamentary layer · CPC title