JPH04321426A - Manufacture of glass run for automobile - Google Patents

Abstract

PURPOSE:To provide a glass run which may satisfy all requirements concerning the cost, the slidability and the wear resistance. CONSTITUTION:In a glass run laid in a running channel which is provided in a door of an automobile, for guiding a vertically movable glass pane, a film made of ultra-high-molecular polyethylene containing 1 to 10wt.% of silicone oil is formed on the base bottom surface A of the inner part of a base member 1 made of EPDM rubber.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass run for an automobile in which a door glass that moves up and down slides and makes elastic contact.

0002

[Prior Art] Conventionally, glass runs for automobiles have been made using EP to provide easy sliding properties and abrasion resistance to the door glass.
The base material is made of thermosetting resin such as DM rubber or thermoplastic resin such as PVC, and the surface on which the door glass slides or makes elastic contact is flocked or specially coated, or a film of PTFE, polyethylene, etc. is laminated. There is.

[0003] However, flocking and special coatings are unsatisfactory in terms of durability, and PTFE is extremely expensive, which poses a problem in terms of economy. Furthermore, although polyethylene has higher durability and is much cheaper than PTFE, it has the problem that it is inferior to other materials in terms of ease of sliding.

0004

The problem to be solved is that there is no glass run that can satisfy all aspects of cost, ease of sliding, and abrasion resistance.

[0005]

[Means for Solving the Problems] The present invention includes forming a film 2 of ultra-high molecular weight polyethylene containing 1 to 10% by weight of silicone oil on the inner basal surface A of a base material 1 made of EPDM rubber. It is what it is.

[0006]

[Example] To explain the example with drawings, 1
is a base material made of EPDM rubber, consisting of a main body portion 1a having a U-shaped cross section and seal lips 1b, 1b protruding from both open ends of the main body portion 1a toward the center line; On the base surface A, a film 2 of ultra-high molecular weight polyethylene containing 1 to 10% by weight of silicone oil is provided.
has been formed. The outer surfaces of the seal lips 1b, 1b may be flocked or special coated as usual to form a flocked layer 3 or a special coating film 4. Preferably, a film 2 is formed.

[0007] To explain the operation, the door glass is made by forming a film 2 of ultra-high molecular weight polyethylene containing 1 to 10% silicone oil on at least the base surface A, preferably on the outer surface of the seal lips 1b and 1b. It can be slid smoothly and easily, and even if the film 2 is repeatedly subjected to sliding and elastic contact with door glass, it will not wear out over a long period of time. The basis for limiting the amount of silicone oil impregnated to 1 to 10% by weight is that if it is less than 1%, there is almost no effect on improving sliding properties, and if it exceeds 10%, silicone oil will precipitate on the surface. This is due to

[0008]

[Effects of the Invention] Since the present invention is configured as described above,
The sliding resistance when raising and lowering the door glass is low, it is easy to open and close, and it has high wear resistance and will not wear out over a long period of time.
Moreover, it is extremely cheap.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing another embodiment of the present invention.

FIG. 3 is a sectional view showing a third embodiment of the invention.

[Explanation of symbols]

1 Base material 1a Main body part 1b Seal lip 2 Film 3. Flocked layer 4 Special coating film A Basal surface

Claims (1)

[Claims] Claim 1: An automobile comprising an ultra-high molecular weight polyethylene film (2) containing 1 to 10% by weight of silicone oil laminated on the inner basal surface (A) of a base material (1) made of EPDM rubber. grass run.