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Method of manufacturing structured release liner

A release liner, structuring technology, applied in the direction of chemical instruments and methods, film/sheet adhesives, layered products, etc., can solve the problem of material loss of use

Inactive Publication Date: 2009-08-19
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Adhesion loss at either interface can render the material useless

Method used

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  • Method of manufacturing structured release liner
  • Method of manufacturing structured release liner
  • Method of manufacturing structured release liner

Examples

Experimental program
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Effect test

example 1

[0101] The coating apparatus was assembled by tying each end of a Number 75 Mayer rod to the coater platform to hold the rod stationary. Number 75 Mayerrod typically provides a coating thickness of 171 microns (6.75 mils) wet. The pulp is inserted between the rod and the platform. Apply Photocurable Mixture 1 to the paper behind the rod, then pull the paper from under the rod. The coated paper was then passed through a UV curing unit (processor from the American Ultraviolet Company) 2 times back and forth, using a speed of 16.5 m / min (55 ft / min) and 0.300 J / cm for each pass. 2 (Uvicure UV curing Radiometer, Electronic Instrumentation Technology Inc.). The cured coating had approximately 5 linear ridges per centimeter (13 per inch) with thin layers of UV cured coating in between. The dimensions of the ridges are about 1,400 microns wide by 336 microns high.

example 2

[0103] The procedure described in Example 1 was repeated except that a Number 5 Mayerrod was used. A Number 5 Mayer rod typically provides a coating with a wet thickness of 11.4 microns (0.45 mils). The cured coating had approximately 28 linear ridges per centimeter (71 per inch). The dimensions of the ridges are about 170 to about 265 microns wide and an average of 24 microns high.

example 3

[0105] The procedure described in Example 2 was repeated, except that Photocurable Mixture 2 was used. The material spreads smoothly and at a speed of 9.1 m / min (30 ft / min) and 0.510 joules / cm 2 post-cure with one pass of radiation. The cured layer had about 28 to 32 linear ridges per centimeter (71 to 82 per inch). The dimensions of the ridges were determined to be about 211 to 247 microns wide by an average of 20 microns high. This sheet was coated with a thin layer of silicone release agent and cured in an oven to form the liner. The PSA solution was coated onto the liner at a wet thickness of 178 microns (7 mils) and dried in an oven at 71°C (160°F) for 10 minutes. A PVC film backing was laminated to the dried PSA coating. The film backing / PSA laminate was easily removed from the liner. WYKO analysis of the PSA surface showed continuous grooves with an average depth of about 12 microns. The Rivet Appraisal Team Inspection takes only 18 to 20 seconds and the Dent Appr...

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Abstract

Disclosed herein is a method of manufacturing a structured release liner. The method includes providing a base; providing a ridge-forming material; coating the ridge-forming material on the base; forming the ridge-forming material into at least one ridge using a coating bar having a profile; and solidifying the ridge-forming material. Coating the ridge-forming material on the base and forming the ridge-forming material into the at least one ridge using a coating bar may be carried out simultaneously.

Description

technical field [0001] This patent application relates to methods of making structured release liners, and in particular to coating methods for forming structured release liners. Background technique [0002] Pressure sensitive adhesives can be used to join the two materials. The interface between the adhesive and the two materials is extremely important to the properties of the materials being joined. Adhesion loss at either interface can render the material useless. Adhesives have been structured in the past for a variety of reasons. [0003] Various methods for structuring adhesives are known, including, for example, U.S. Patent Application Nos. 5,296,277 and 5,362,516 (both to Wilson et al); 5,141,790 and 5,897,930 (both to Calhoun et al); and 6,197,397 Methods disclosed in (Sher et al.). These patents disclose how to build structures in the adhesive from the interface between the adhesive and the release liner. [0004] These release liners are generally produced b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/02B32B33/00
CPCB32B2038/0076B32B38/164B32B2037/243C09J2483/005B32B38/06C09J2427/005C09J7/0232C09J7/403B32B37/02B32B33/00
Inventor 弗兰克·T·谢尔戴维·J·亚鲁索迈克尔·R·凯斯蒂
Owner 3M INNOVATIVE PROPERTIES CO
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