Adhesive paper tapes

• US 5,209,973 A
• Filed: 09/30/1991
• Issued: 05/11/1993
• Est. Priority Date: 10/19/1988
• Status: Expired due to Term

• Current Assignee: Tesa AG (Maxingvest AG)
• Original Assignee: Beiersdorf AG (Maxingvest AG)
• Inventors: Wille, Romanus, Knolle, Herbert
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): ZIRKER, DANIEL R
• Application Number:
  US07/767,954
• Time in Patent Office: 589 Days
• Field of Search: 428/153, 428/154, 428/343, 428/353, 428/537.5, 428/352, 162/100, 427/208, 427/208.8
• US Class Current: 428/352
• CPC Class Codes: C09J 2400/283 in the substrate
• CPC Class Codes: C09J 7/21 Paper; Textile fabrics
• CPC Class Codes: D21H 27/00 Special paper not otherwise provided for, e.g. made by multi-step processes
• CPC Class Codes: Y10T 428/24455 Paper
• CPC Class Codes: Y10T 428/24463 Plural paper components
• CPC Class Codes: Y10T 428/28 Web or sheet containing structurally defined element or component and having an adhesive outermost layer
• CPC Class Codes: Y10T 428/2839 with release or antistick coating
• CPC Class Codes: Y10T 428/2843 including a primer layer
• CPC Class Codes: Y10T 428/31993 Of paper

Abstract

Adhesive paper tape, obtainable by impregnating and coating a paper which, immediately after the production process and still in the moist state, has been compressed between a rotating roller and a rotating web, and dried and which has

a mean weight of 45-80 g/m²

a mean extensibility of 8-20%

a means tensile strength of at least 35N/15 mm and

a mean thickness of at most 0.13 mm.

Claims

1. An unsized adhesive paper tape produced by

(a) compressing between a rotating roller and a rotating elastic web a still moist freshly prepared paper, to produce a microcreped paper,

(b) drying,

(c) impregnating said paper with a latex,

(d) coating said paper on at least one side with a primer composition,

(e) coating one side of said paper with a release adhesive to form a release coat, and

(f) coating the other side of said paper with an adhesive composition,

said paper having

a mean weight of 45-80 g/m²,

a mean extensibility of 8-20%,

a mean tensile strength of at least 35N/15 mm and

a mean thickness of at most 0.13 mm.

2. An adhesive paper tape according to claim 1, wherein the paper has

a mean weight of 50-60 g/m²,

a mean extensibility of 12-17%,

a mean tensile strength of at least 35N/15 mm and

a mean thickness of at most 0.10 mm.

3. An adhesive paper tape according to claim 1, wherein the impregnating agent of step (c) is selected from the group consisting of

a polyacrylate,

an SBR latex and

a polyvinyl acetate latex.

4. An adhesive paper tape according to claim 1, wherein the release coat is selected from the group consisting of a polyacrylate, an SBR latex, polyvinyl acetate, a silicone and a fluorohydrocarbon.

5. An adhesive paper tape according to claim 1, wherein the adhesive composition is selected from the group consisting of

an SIS rubber,

an SBS rubber,

a polyacrylate,

a polyisobutylene and

natural rubber

each in conjunction with at least one of a naturally occurring and synthetic resin.