Stock material or miscellaneous articles – Structurally defined web or sheet – Continuous and nonuniform or irregular surface on layer or...
Patent
1993-07-14
1995-08-08
Watkins, III, William P.
Stock material or miscellaneous articles
Structurally defined web or sheet
Continuous and nonuniform or irregular surface on layer or...
428409, 428461, 428523, B32B 1508
Patent
active
054397294
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention relates to a film and a transfer metallizing sheet, especially a transfer metallizing film having a transfer, surface for releasable lamination of a metal transfer layer thereto, and a transfer metallizing sheet having such film.
PRIOR ART
As a wrapping paper for food which is apt to be affected by humidity such as chewing gum, there is used a wrapping paper having a metal deposited layer for the prevention of humidity. This wrapping paper is produced by vapor-depositing a metal, e.g. aluminum, on paper for wrapping use. However, if a metal is vapor-deposited directly onto paper for wrapping use, the gloss of the resulting metal-deposited layer is not good and it is impossible to obtain a beautiful wrapping paper. To avoid this inconvenience, as a method for producing a wrapping paper having a metal-deposited layer, there has been adopted a method in which a resin film having a metal-deposited layer (hereinafter referred to as "transfer metallizing sheet") is provided, and the metal layer of the transfer metallizing sheet is transferred onto paper for wrapping use.
Heretofore, as the resin film used in the preparation of the above transfer metallizing sheet, there has been known the polypropylene resin film described in U.S. Pat. No. 4,777,081. Said polypropylene resin film has a three-layer structure comprising a core layer and coating layers formed on both sides of the core layer, the viscosity of the coating layers being set lower than that of the core layer. For improving the electricity suppressing property of the film, an organic material of a low molecular weight such as, for example, a mixture of stearic amide and alkylamine, is incorporated in the core layer.
In such transfer metallizing film, a metal is vapor-deposited on the surface of each coating layer to form a metal layer to be transferred (i.e. metal transfer layer), and this film is used as a transfer metallizing sheet.
In the above known transfer metallizing film, however, the flatness of the coating layer surface is not good. Therefore, when the metal transfer layer of the transfer metallizing sheet prepared using the known film is transferred onto a receptor, the surface roughness of the coating layer is reflected on the surface of the metal transfer layer thus transferred.
In the known film, moreover, the transferability of the metal transfer layer is not good because the bonding strength between the coating layer and the metal transfer layer becomes too high.
Further, since the known film is not satisfactory in its electricity suppressing property, a lightning discharge is apt to occur and consequently a thunder mark is easily formed on the transferred metal transfer layer.
OBJECT OF THE INVENTION
In a first aspect of the present invention, it is the object to provide a transfer metallizing film which permits the formation of a beautiful and smooth metal transfer layer with suppressed thunder mark and which is for realizing transfer metallizing sheet superior in the transferability of the metal transfer layer.
In a second aspect of the present invention, it is an object to provide a transfer metallizing sheet using the transfer metallizing film according to the first aspect of the invention.
SUMMARY OF THE INVENTION
The transfer metallizing film according to the first aspect of the present invention has a transfer surface for releasable lamination of a metal transfer layer thereto. It is constituted by a polypropylene resin film not more than 5 kV in the amount of static electricity. As to the transfer surface of the film, the surface roughness is set at a value of not larger than 0.1 .mu.m: and an atomic construction ratio of the number of oxygen atoms/the number of carbon atoms within 10 nm from the surface is set at 0.about.0.03. As to the other side of the sheet base, such atomic construction ratio within 10 nm from the surface is set at 0.1.about.0.5.
BRIEF DESCRIPTION OF THE DRAWINGS
FIGS. 1 and 2 are partial, longitudinally sectional views each showing an example of a tr
REFERENCES:
patent: 4725466 (1988-02-01), Crass et al.
patent: 4777081 (1988-10-01), Crass et al.
patent: 4875963 (1989-10-01), Paschke et al.
patent: 4912091 (1990-03-01), Bothe et al.
patent: 5096630 (1992-03-01), Bohme et al.
patent: 5110670 (1992-05-01), Janocha et al.
Kawakami Ken-ichi
Maruhashi Hideo
Tsuchiya Katsuhiro
Miller Austin R.
Toray Industries Inc.
Watkins III William P.
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