Method for enveloping silicone gel with plastic films and product thereof

• US 7,699,953 B2
• Filed: 08/29/2006
• Issued: 04/20/2010
• Est. Priority Date: 08/29/2006
• Status: Active Grant

• Current Assignee: Hui-Mei Chen
• Original Assignee: Hui-Mei Chen
• Inventors: Chen, Hui-Mei
• Primary Examiner(s): AFTERGUT, JEFFRY H
• Application Number:
  US11/468,294
• Publication Number:
  US 20080057241A1
• Time in Patent Office: 1,330 Days
• Field of Search: 156/272.2, 156/221, 156/145, 156/242, 156/245, 156/285, 156/286
• US Class Current: 156/145
• CPC Class Codes: B32B 3/08 characterised by added members at particular parts layer formed of separate pieces of material which are juxtaposed side-by-side B32B3/14, B32B3/18
• CPC Class Codes: Y10T 156/1043 Subsequent to assembly
• CPC Class Codes: Y10T 428/1352 Polymer or resin containing [i.e., natural or synthetic]

Abstract

A method and a product of one-time enveloping silicone gel with plastic films. The surfaces of two films to be in contact with the silicone gel are treated by a plasma casing process (crosslinking by activated species of inert gases) or an electron beam process in advance so as to improve the wetting capability thereof. Thereby the films and the silicone gel are able to tightly combine together without the fear of separation. The operation is carried out under a vacuum environment so that no bubble will be generated therein and the leakage of the silicone gel on welding portions will be prevented.

Claims

1. A method for enveloping silicone gel with plastic films, comprising the steps in sequence of:

a) providing a first plastic film with a first surface and a second plastic film with a second surface;

b) performing a surface implement process to the first surface and the second surface to improve surface wetting capability of the first surface and the second surface; and

c) locating the first plastic film and the second plastic film separately in a vacuum chamber, holding the first plastic film with the first surface facing upwards to receive silicone gel and setting the second plastic film on top of the first plastic film with the second surface facing downwards to cover the first plastic film, and applying the silicone gel then cover the second plastic film on the silicon gel and edge of the first plastic film, and sealing contact edges of the first plastic film and the second plastic film, so as to tightly envelope the silicone gel between the first plastic film and the second plastic film without generating any bubble and air and leak in the vacuum chamber.

2. The method of claim 1, wherein the surface implement process is a plasma-casing process or an electron beam process.

3. The method of claim 1, wherein each of the first plastic film and the second plastic film comprises polyurethane.

4. The method of claim 1, wherein the contact edges of the first plastic film and the second plastic film are sealed by a film sealing machine.