Cap ply for pneumatic tire and method of manufacturing cap ply for pneumatic tire

Patent metadata

Field	Value
Publication number	US-2016200146-A1
Application number	US-201614991400-A
Country	US
Kind code	A1
Filing date	Jan 8, 2016
Priority date	Jan 9, 2015
Publication date	Jul 14, 2016
Grant date	—

Abstract

The present disclosure is directed to a cap ply for a pneumatic tire. The cap ply includes a film layer, a coating layer configured to surround an outer surface of the film layer and a rubber topping layer configured to surround an outer surface of the coating layer.

First claim

What is claimed is:

1 . A cap ply for a pneumatic tire, comprising:
a film layer; a coating layer configured to surround an outer surface of the film layer; and a rubber topping layer configured to surround an outer surface of the coating layer.

2 . The cap ply of claim 1 , wherein the rubber topping layer comprises a rubber topping liquid having fluidity on the outer surface of the film layer.

3 . The cap ply of claim 1 , wherein the film layer comprises a polymer material selected from a group consisting of polyethylene terephthalate, polyethylene naphthalate, nylon-6 and nylon-66.

4 . A pneumatic tire, comprising the cap ply of claim 1 , wherein the cap ply is arranged between a tread and a belt of the pneumatic tire, and the cap ply comprises a plurality of cap plies disposed in a spaced-apart relationship with each other.

5 . A method of manufacturing a cap ply for a pneumatic tire, comprising:
forming a film layer by cutting a film; forming a coating layer by coating a coating liquid on the film layer; and forming a rubber topping layer by applying a rubber topping liquid on the coating layer.

6 . The method of claim 5 , wherein forming the film layer further comprises melt-spinning a polymer material selected from a group consisting of polyethylene terephthalate, polyethylene naphthalate, nylon-6 and nylon-66.

7 . The method of claim 5 , wherein forming the coating layer further comprises coating the coating layer on an entire outer surface of the film layer.

8 . The method of claim 5 , wherein forming the rubber topping layer further comprises forming the rubber topping layer subsequently after forming the coating layer.

9 . The method of claim 5 , wherein the coating liquid coated on the film layer comprises resorcinol formaldehyde latex which includes 1.8 to 6.0 wt % of vinyl pyridine latex.

10 . The method of claim 5 , wherein the rubber topping liquid comprises an NR-based natural rubber in which a weight ratio of carbon black is 10 to 15 PHR.

Assignees

• Kumho Tire Co Inc

Inventors

• Lee Gab Bae

Classifications

• B60C9/18 Primary

  Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers · CPC title

• B29D30/0681

  Parts of pneumatic tyres; accessories, auxiliary operations · CPC title

• B60C2009/1878

  with flat cushions or shear layers between the carcass and the belt · CPC title

• B60C9/1835 Primary

  Rubber strips or cushions at the belt edges · CPC title

• B05D7/04

  to surfaces of films or sheets (producing layered products by applying coatings of pasty or pulverulent plastics B29C41/00) · CPC title