Laminate

Patent metadata

Field	Value
Publication number	US-2019375199-A1
Application number	US-201816476795-A
Country	US
Kind code	A1
Filing date	Jan 12, 2018
Priority date	Jan 13, 2017
Publication date	Dec 12, 2019
Grant date	—

Abstract

A laminated body formed by laminating a fiber substrate composed of a plurality of fibers and a polymer layer formed from a polymer latex. The polymer layer covers the fiber substrate in a state in which a portion of the polymer layer has permeated among the fibers. A ratio (t1/d) of a thickness t1 of the portion of the polymer layer that has permeated among the fibers (from a top surface of the fiber substrate) to a substrate layer average thickness d is 0.1 to 0.95. A thickness t2 of the portion of the polymer layer covering the top surface of the fiber substrate (from the top surface of the fiber substrate) is 80 μm or more.

First claim

1 . A laminated body formed by laminating a fiber substrate composed of a plurality of fibers and a polymer layer formed from a polymer latex, wherein
the polymer layer covers the fiber substrate in a state in which a portion of the polymer layer has permeated among the fibers; a ratio (t 1 /d) of a thickness of a permeated polymer layer t 1 to a substrate layer average thickness d is 0.1 to 0.95, where the thickness of the permeated polymer layer of the polymer layer, which is a portion that has permeated among the fibers, from a top surface of the fiber substrate is set to t 1 [μm] and a substrate layer average thickness of the fiber substrate is set to d [μm]; and a thickness of a top surface polymer layer t 2 [μm] is 80 μm or more, where the thickness of the top surface polymer layer of the polymer layer, which is a portion covering the top surface of the fiber substrate, from the top surface of the fiber substrate is set to t 2 [μm].

2 . The laminated body according to claim 1 , wherein the polymer latex comprises a nonionic water-soluble polymer as a thickener.

3 . The laminated body according to claim 2 , wherein a content ratio of the nonionic water-soluble polymer in the polymer latex is 0.1 to 5.0% by weight.

4 . The laminated body according to claim 2 , wherein the nonionic water-soluble polymer is a polyvinyl alcohol and/or polyvinyl pyrrolidone.

5 . The laminated body according to claim 1 , wherein a polymer constituting the polymer latex is a nitrile rubber.

6 . The laminated body according to claim 5 , wherein the nitrile rubber contains an ethylenically unsaturated nitrile monomer unit, a conjugated diene monomer unit, and an ethylenically unsaturated acid monomer unit.

7 . A protective glove comprising the laminated body according to claim 1 .

8 . A method of producing the laminated body according to claim 1 , the method comprising:
a latex deposition step of depositing the polymer latex on the fiber substrate; and a coagulation step of forming the polymer layer by bringing a coagulant solution into contact with the polymer latex deposited on the fiber substrate to cause a polymer in the polymer latex to coagulate, wherein when depositing the polymer latex on the fiber substrate, the polymer latex is deposited on the fiber substrate in a state in which a viscosity of the polymer latex is controlled in a range of 600 to 25,000 mPa.s, the viscosity being measured by using a B-type viscometer under conditions of a rotational speed of 10 rpm.

9 . The method of producing the laminated body according to claim 8 , wherein when depositing the polymer latex on the fiber substrate, the polymer latex is deposited on the fiber substrate in a state in which the viscosity of the polymer latex is controlled to 600 to 25,000 mPa.s, the viscosity being measured by using a B-type viscometer under conditions of a temperature of 25° C., a solid content concentration of 45% by weight, and a rotational speed of 10 rpm.

Assignees

• Zeon Corp

Inventors

• TANIYAMA Tomoya
• Hayasaka Kentaro
• Kato Shinji

Classifications

• B32B2333/00

  Polymers of unsaturated acids or derivatives thereof · CPC title

• B32B37/24

  with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate (B32B37/15 takes precedence) · CPC title

• B32B2307/51

  Elastic · CPC title

• B32B2037/243

  Coating · CPC title

• B32B2310/0418

  other than water · CPC title