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Linerless double-sided pressure sensitive adhesive tape

a pressure sensitive adhesive and tape technology, applied in the field of adhesive tapes, can solve the problems of negative impact on other properties, time-consuming and labor-intensive use, peeling strength of the psa, etc., and achieve the effect of reducing the cost of the tap

Inactive Publication Date: 2011-01-18
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0007]The present invention relates to a double-sided pressure sensitive adhesive foam tape. In certain embodiments the foam tape does not require the use of a release liner. Elimination of the release liner reduces the cost of the tape and also avoids problems associated with damage to the liner during traditional tape manufacturing from exposure to e-beam radiation. The double-sided pressure sensitive adhesive foam tape is produced, in specific implementations, without e-beaming to cure the adhesives, although the tape can be e-beamed in alternate implementations.

Problems solved by technology

Although these processes improve cohesive strength, they often negatively impact other properties, including peel strength of the PSA.
Although such release liners are functional, they have the disadvantage of being time consuming to use, as well as adding expense to the PSA tape and waste to its application.

Method used

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  • Linerless double-sided pressure sensitive adhesive tape
  • Linerless double-sided pressure sensitive adhesive tape
  • Linerless double-sided pressure sensitive adhesive tape

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0052]A double-sided pressure sensitive adhesive tape was produced by first extruding a foam core layer consisting of a blend of 90 parts of isooctyl acrylate, 10 parts of acrylic acid, 0.006 parts of 2,2′ azobis(2,4-dimethylpentanenitrile) (VAZO 52, Dupont, Wilmington, Del.), 0.0028 parts 2,2′ azobis(cyclohexanecarbonitrile) (VAZO 88, Dupont, Wilmington, Del.), 0.004 parts di-t-amyl peroxide, 0.11 parts carbon tetrabromide, 0.75 parts of a 26% solids mixture of 4-acryloxy benzophenone in ethyl acetate, 0.097 parts of IRGANOX 1010 (tetrakis(methylene(3,5 di-tert-butyl-4-hydroxyhydrocinnamate))methane) (Ciba Specialty Chemicals, Tarrytown, N.Y.). The core material was polymerized as described in Example 1 of U.S. Pat. No. 5,753,768 incorporated herein by reference. The resulting blend had an intrinsic viscosity of about 0.61 deciliters / gram, Mw of 2.7×105 g / mol and Mn of 1.5×104 g / mol. The blend was further mixed with expandable microspheres (F80D, Pierce-Stevens Co., Buffalo, N.Y.) ...

example 2

[0054]A double-sided pressure sensitive adhesive tape was produced as in Example 1 except the PIC was metered into the extruder at a rate of 4 parts of PIC per hundred parts of acrylic composition to increase the degree of crosslinking and the tensile strength of the foam.

example 3

[0055]A double-sided pressure sensitive adhesive tape was produced as in Example 1 except the PIC was metered into the extruder at a rate of 6 parts of PIC per hundred parts of acrylic composition to increase the degree of crosslinking and the tensile strength of the foam.

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Abstract

The present invention relates to a double-sided pressure sensitive adhesive foam tape. In certain embodiments the foam tape does not require the use of a release liner. Elimination of the release liner reduces the cost of the tape and also avoids problems associated with damage to the liner during traditional tape manufacturing from exposure to e-beam radiation.

Description

RELATED APPLICATIONS[0001]This Application is a reissue application of U.S. Pat. No. 6,864,322, which issued on Mar. 8, 2005. The entire content of this U.S. patent is incorporated herein by reference.<?insert-end id="INS-S-00001" ?>FIELD OF THE INVENTION[0002]The present invention relates to adhesive tapes, more specifically to pressure sensitive adhesive tapes. In particular, the invention relates to double-sided pressure sensitive adhesive tapes.BACKGROUND[0003]Pressure sensitive adhesive (PSA) compositions are used in a wide variety of applications. Numerous applications require pressure sensitive adhesives to support a load at elevated temperatures, typically in the range of greater than 70° C., for which high cohesive strength PSAs are required. A standard method of increasing cohesive strength at elevated temperatures is to chemically crosslink the PSA using irradiation processes, such as thermal radiation, ultraviolet (UV) radiation, gamma radiation, and electron beam ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): C08L33/08C09J7/22C09J7/26C09J7/38
CPCC09J7/0246C09J7/0289C09J2201/128C09J2201/134Y10T428/2891C09J2433/006Y10T428/28Y10T428/1457Y10T428/2887C09J2433/00C09J7/38C09J7/22C09J7/26C09J2301/1242C09J2301/124C09J133/06
Inventor GEHLSEN, MARK D.STARK, PETER A.MOMCHILOVICH, BRADLEY S.
Owner 3M INNOVATIVE PROPERTIES CO