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Adhesive-backed articles

a technology of adhesives and articles, applied in the field of adhesive-backed articles, can solve the problems of affecting the positioning of the article, the difficulty of placing the film in a specific position prior to the formation of a bond between the adhesive and the substrate, and the difficulty of reapplying the articl

Inactive Publication Date: 2008-05-08
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to an adhesive-backed article with a microstructured surface that allows for fluid egress and positioning without affecting the appearance of the article. The microstructured surface includes channels in the adhesive that create a pathway for fluid to escape from the article. The article can easily slide over a substrate without grabbing or bonding to it and can be releasably bonded to a substrate with a force. The article also enhances the egress of fluid from the interface between the adhesive and the substrate. The microstructured surface is formed by embossing the adhesive layer or liner with a structure or structures. The article can be positioned without applying a force and can easily release from the substrate. The microstructured surface is suitable for contact with an adhesive and can be used as a release liner or a backing. The invention provides an adhesive-backed article with improved fluid egress and positioning capabilities.

Problems solved by technology

The placement of a film into a specific position prior to the formation of a bond between the adhesive and the substrate is often difficult, but important for aesthetic reasons.
Such articles can often be particularly difficult to reapply if they inadvertently adhere to the substrate.
The inability to slide the adhesive-backed article in place can adversely affect the positioning of the article or cause damage to the article upon attempted repositioning after adhesion.
Additionally, bubbles under a film can adversely affect the adhesive performance of the article.
However, the utilization of thin films can create an appearance problem.
The thinner films have a tendency to show all surface abnormalities or uneven portions of either the adhesive or the substrate upon which the adhesive-backed article is applied.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

Surface Roughness Test

[0075] The surface topography of a film is measured using the RST Plus surface profiling system available from Wyko Corporation in the vertical scanning interferometer mode (VSI) at a magnification of 1.2× and a pixel size of 13.64 μm.

[0076] The system uses an interference microscope and a computer algorithm to analyze the surface. In the system, a white light beam passes through a microscope objective to the sample surface. A beam splitter reflects half of the incident beam to a reference surface. The beams from the sample and the reference surface recombine at the beam splitter to form interference fringes which are alternating light and dark bands that are visible when the surface is in focus. The reference arm containing the interferometric objective moves vertically to scan the surface at varying heights using a linearized piezoelectric transducer to control the motion. The interference fringes for white light are present only over a very shallow depth f...

examples 1-11

, produced in accordance with the present invention, exhibit good appearance, good air bleedability, and at least fair slidability. The appearance was determined by visual examination with the unaided eye. A good appearance result indicates no observable underlying structure. A poor appearance results if the pattern is visible. With respect to Examples C1-C3, the average volume per any 500 μm diameter circular area is indeterminate since some 500 μm diameter circular areas do not have channels. Additionally, Examples C1-C3 have poor appearance indicating that patterns created by the channels are visible with the human eye after application.

[0096] Samples from each Example measuring approximately 2.54 cm by 2.54 cm were then laminated to a clean glass plate using a plastic squeegee. The samples were then analyzed for surface roughness and periodicity according to the procedure described above. Example C4 is the vinyl film with no adhesive laminated to it, and C5 is the vinyl film wit...

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Abstract

Methods of preparing adhesive-backed articles and methods of applying adhesives backed articles are described. The adhesive-backed articles include a compliant film and a pressure-sensitive adhesive having a microstructured surface opposite the compliant film.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application is a divisional application of U.S. application Ser. No. 10 / 357,151, filed Feb. 3, 2003, now pending; which is a continuation-in-part of U.S. application Ser. No. 09 / 311,101, filed May 13, 1999, now issued as U.S. Pat. No. 6,524,675, the disclosure of which is incorporated by reference in its entirety herein.FIELD OF THE INVENTION [0002] The present invention relates to an adhesive-backed article, more particularly to such an adhesive-backed article having an adhesive with a microstructured surface bonded to a compliant film, and even more particularly to channels, with a specific volume per unit area, formed by the microstructured surface in the adhesive which permit the desirable properties of positionability and fluid egress to a periphery of the article without adversely affecting the surface appearance of the film after application onto a substrate. BACKGROUND OF THE INVENTION [0003] Films are often bonded to subst...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B32B37/12B32B27/00B29C59/04B29L7/00C09J7/38C09J201/00
CPCB44C1/105Y10T428/28C09J7/0232C09J2201/28B32B3/30B32B37/1284Y10T428/24562Y10T428/14Y10T428/24959Y10T428/1486Y10T428/1476Y10T428/2843Y10T156/10Y10T156/1023Y10T428/1471Y10T428/2902Y10T428/24479C09J7/0207C09J7/38C09J7/403C09J2301/204B32B37/24B32B38/0012B32B2037/243B32B2405/00B32B2605/08
Inventor MIKAMI, HARUYUKIFLEMING, PATRICK R.MAZUREK, MIECZYSLAW H.
Owner 3M INNOVATIVE PROPERTIES CO
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