# US 4,397,905 A · Adhesive tape

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- Number: US 4,397,905 A
- Document ID: US4397905A
- Status: Granted
- Kind: A
- Application number: 06/204,863
- Filed: 1980-11-07
- Granted: 1983-08-09
- Earliest claimed: 1979-11-08
- Assignees: Hoechst Aktiengesellschaft
- Inventors: Gerhard Dettmer; Peter Hammerschmidt
- Web page: https://patentgrep.com/patent/US4397905A

## CPC

- C09J 7/22: Plastics; Metallised plastics
- Y10S 428/906: Roll or coil
- Y10S 428/91: Product with molecular orientation
- Y10T 428/1424: Halogen containing compound
- Y10T 428/1452: Polymer derived only from ethylenically unsaturated monomer
- Y10T 428/24521: with component conforming to contour of nonplanar surface
- Y10T 428/24661: Forming, or cooperating to form cells
- Y10T 428/24678: Waffle-form
- Y10T 428/266: of base or substrate
- Y10T 428/28: Web or sheet containing structurally defined element or component and having an adhesive outermost layer
- C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H)
- Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Disclosed is an adhesive tape comprising a support film of a synthetic thermoplastic polymer, preferably polyvinylchloride or polypropylene, and an adhesive layer on one side of it, wherein the support film has a thickness less than about 35 .mu.m and preferably is stretch-oriented. Provided on the surface of the support film facing away from the adhesive layer are elevations having a depth within a range of from about 5 to 20 .mu.m.

## Claims

### Claim 1

An adhesive tape, comprising:
a stretch-oriented and embossed support film of synthetic thermoplastic polymer having first and second sides and a thickness of less than about 35 .mu.m and having on its first side a plurality of elevations formed by embossing the film and having a height within the range of from about 5 to 20 .mu.m, and on its second side a plurality of depressions equal and opposite to said elevations; and
a layer of pressure-sensitive adhesive on the second side of said support film.

### Claim 2 (depends on 1)

An adhesive tape according to claim 1, wherein said adhesive tape is in the form of a roll comprising a plurality of windings with the pressure-sensitive adhesive of each winding being in contact with and adhered to the first side of the support film of the adjacent winding.

### Claim 3 (depends on 1)

An adhesive tape according to claim 1, wherein the support film is biaxially stretch-oriented.

### Claim 4 (depends on 3)

An adhesive tape according to claim 3, wherein the stretch-oriented support film has a thickness of about 20 to 30 .mu.m.

### Claim 5 (depends on 1)

An adhesive tape according to claim 1, wherein the support film comprises polyvinylchloride or polypropylene.

### Claim 6 (depends on 1)

An adhesive tape according to claim 1, wherein the support film comprises polyvinylchloride.

### Claim 7 (depends on 1)

An adhesive tape according to claim 1, wherein the support film comprises polypropylene.

### Claim 8 (depends on 1)

An adhesive tape according to claim 1, wherein said elevations form a diamond pattern.

### Claim 9 (depends on 1)

An adhesive tape according to claim 1, comprising a roll of said adhesive tape having the first side of said support film facing the radial outside of the roll.

### Claim 10 (depends on 1)

An adhesive tape according to claim 1, whereby said elevations and corresponding depressions form a plurality of hollow protrusions of flexible thermoplastic polymer extending out of the plane of the film.

### Claim 11 (depends on 1)

An adhesive tape according to claim 1, wherein said first side of said support film forms one surface of the tape and said adhesive layer forms a substantially planar second surface of the tape.

### Claim 12 (depends on 1)

An adhesive tape according to claim 1, wherein said adhesive layer comprises a smooth profile on the surface opposite said support film.