Bridge tape with directed foam expansion and method for sealing holes in sheet metal or plastic parts of automobile bodies

Patent metadata

Field	Value
Publication number	US-10480656-B2
Application number	US-201615242959-A
Country	US
Kind code	B2
Filing date	Aug 22, 2016
Priority date	Aug 22, 2016
Publication date	Nov 19, 2019
Grant date	Nov 19, 2019

Abstract

Bridge tape with directed foam expansion comprised of thermally foamable composition, useful for applying coating material through holes in the tape to a substrate beneath the tape, after which the holes can be sealed by heating to cause the foamable composition to foam and the foam to seal the holes.

First claim

The invention claimed is:

1. A bridge tape comprising:
a foamable composition comprising an expandable microballoon;
a first backing material;
a second backing material; and
an adhesive coating or a two-sided adhesive tape,

wherein:
the foamable composition is disposed between the first backing material and the second backing material;
the adhesive coating or the two-sided adhesive tape is disposed between the first backing material and the foamable composition; and
the first backing material and the second backing material are fixed by a thread.

2. The bridge tape of claim 1 , wherein the thread comprises:
a continuous filament of a synthetic polymer selected from the group consisting of polyester, polyamide, polyimide, aramid, polyolefin, polyacrylonitrile, and glass;
a manmade filament based on a natural polymer selected from the group consisting of cellulosic filaments and rubber filaments; or
a natural filament comprising cotton, sisal, flax, silk, hemp, linen, coconut, or wool.

3. The bridge tape of claim 1 , wherein the bridge tape has been die-cut to form a die-cut patch.

4. The die-cut patch of claim 3 , wherein the first backing material is of a smaller size than the second backing material.

5. The die-cut patch of claim 3 , further comprising a plurality of holes passing through the die-cut patch.

6. The bridge tape of claim 1 , wherein the first backing material is a cloth tape.

7. The bridge tape of claim 1 , further comprising a further adhesive coating or a two-sided adhesive tape disposed between the second backing material and the foamable composition.

8. The bridge tape of claim 7 , further comprising a release liner.

9. The bridge tape of claim 8 , further comprising a second further adhesive coating or a second two-sided adhesive tape, wherein the second further adhesive coating or the second two-sided adhesive tape is disposed between the second backing material and the release liner.

10. A method comprising:
covering an opening with the die-cut patch of claim 3 ;
applying a liquid coating material to the opening by passing the liquid coating material through a hole passing through the die-cut patch; and
heating the die-cut patch, thereby causing a foamable composition to foam to form a foamed composition,

wherein the foamed composition seals the opening.

Assignees

• Tesa Se

Inventors

• Fallon Robert
• SEDLECKY Elliot
• Boecker Patrick
• Meier Andreas

Classifications

• B32B2307/748

  Releasability · CPC title

• F16J15/108 Primary

  Special methods for making a non-metallic packing · CPC title

• C08K9/10

  Encapsulated ingredients · CPC title

• B32B27/306

  comprising vinyl acetate or vinyl alcohol (co)polymers · CPC title

• B32B5/26

  another layer {next to it} also being fibrous or filamentary {(relative arrangement of fibres or filaments of different layers B32B5/12)} · CPC title