Linerless thermal and thermal transfer labels

Details Linerless thermal and thermal transfer labels Linerless thermal and thermal transfer labels

1992-07-15

1994-03-08

Lesmes, George F.

Record receiver having plural interactive leaves or a colorless

Having a colorless color-former, developer therefor, or...

Spatial relationship specified between color-former and...

503200, 428 40, 428354, 428913, B41M 520, B32B 712

Patent

active

052927130

ABSTRACT:
Thermosensitive linerless labels (either thermal labels or thermal transfer labels) which can be used with food products contain a pressure sensitive adhesive covering one face of a substrate having a thermosensitive layer on the opposite face, and a release coat covering the thermosensitive layer. The release coating is preferably applied directly to the thermosensitive layer, and preferably is prepared by application and then drying of a formulation containing between about 5-25 parts chromium pentahydroxy (tetradecanoato) di-, and about 75-95% water or alcohol. Alternatively, the release coating may be a UV curable silicone with about 1-3% by weight photoinitiator. After the coatings are applied, the stock is dried in a manner that will not adversely affect the thermosensitive layer, e.g. by ultraviolet rays, or air drying at a temperature of less than 150.degree. F. A web comprising the substrate may be slit into individual rolls, and perfing or die cutting is practiced to form individual labels.

REFERENCES:
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patent: 4444819 (1984-04-01), Maruta et al.
patent: 4577204 (1986-03-01), Shibata et al.
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patent: 4633276 (1986-12-01), Shibata et al.
patent: 4647497 (1987-03-01), Weeks
patent: 4707211 (1987-11-01), Shibata
patent: 4740495 (1988-04-01), Marinelli et al.
patent: 4784714 (1988-11-01), Shibata
patent: 4851383 (1989-07-01), Fickenscher et al.
patent: 4898849 (1990-02-01), Kang
patent: 5183696 (1993-02-01), Sanderson
"In-Line Coverting UV Silicone and Hot Melt Combined for General Purpose Tapes and Labels", McIntyre, Adhesives Age, Nov., 1983, pp. 31-33.
"Packaging Week" Magazine, Nov. 29, 1989, p. 27, "Rising Thermals".

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