Plastic tiles and process for preparing the same

Details Plastic tiles and process for preparing the same Plastic tiles and process for preparing the same

1999-08-02

2001-11-20

Crispino, Richard (Department: 1734)

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

C156S220000, C156S278000, C156S289000

Reexamination Certificate

active

06319349

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to plastic tiles and process for preparing the same, more particularly to laminated plastic floor tiles with embossed surfaces and process for preparing the same.
2. Description of the Related Art
FIG. 1
illustrates a piece of a conventional polyvinyl plastic floor tile. The tile includes a substrate
1
, a white-colored polyvinyl skin layer
2
laid on the substrate
1
, a pattern layer
3
printed on the skin layer
2
, and a transparent layer
4
covering the pattern layer
3
for protecting the pattern layer
3
from damage. The patterned skin layer
2
and the transparent layer
4
are laid on the substrate
1
, and are laminated and embossed via hot-pressing or calendering means to form the tile. Due to poor heat and wear resistance properties, the transparent layer
4
of the tile has to be protected via a surface treatment to provide the transparent layer
4
with a high gloss and high abrasion resistant coating
5
that is dried via ultra-violet radiation. However, the coating
5
flattens the embossed surface of the tile, thereby reducing the desired aesthetic embossment and anti-slip effects of the tile.
SUMMARY OF THE INVENTION
Therefore, it is an object of the present invention to provide plastic tiles and process for preparing the same that is capable of overcoming the disadvantages described above.
According to one aspect of this invention, a process for the preparation of plastic tiles of the present invention comprises the steps of: (a) preparing a plastic substrate, (b) providing a pattern layer on a plastic skin layer; (c) applying a varnish coating to the pattern layer; (d) covering a releasable paper on the varnish coating before the varnish coating becomes dry; (e) removing the releasable paper from the varnish coating after the varnish coating becomes dry; and (f) bonding together and embossing, after step (e), the varnish coating, the pattern layer, the skin layer, and the plastic substrate to form a laminate with an embossed surface.
According to another aspect of this invention, a polyvinyl chloride comprises a white-colored polyvinyl chloride sheet coated with a pattern layer, a varnish coating applied to said pattern layer, and a releasable paper covering said varnish coating, wherein said releasable paper covers said varnish coating before said varnish coating becomes dry.
According to still another aspect of this invention, a process for the preparation of plastic tiles, comprising the steps of: (a) preparing a plastic substrate; (b) providing a pattern layer between a plastic skin layer and a plastic transparent layer; (c) applying a varnish coating to the transparent layer; (d) covering a releasable paper on the varnish coating before the varnish coating becomes dry; (e) removing the releasable paper from the varnish coating after the varnish coating becomes dry; and (f) bonding together and embossing, after step (e), the varnish coating, the transparent layer, the pattern layer, the skin layer, and the plastic substrate to form a laminate with an embossed surface.
According to still another aspect of this invention, a polyvinyl chloride skin for plastic tiles, comprising a transparent polyvinyl chloride sheet coated with a varnish coating, and a releasable paper covering the varnish coating, wherein the releasable paper covers the varnish coating before the varnish coating becomes dry.


REFERENCES:
patent: 4196243 (1980-04-01), Sachs et al.
patent: 4211810 (1980-07-01), Barta
patent: 4678528 (1987-07-01), Smith et al.
patent: 5304272 (1994-04-01), Rohrbacker et al.
patent: 5401348 (1995-03-01), Oguchi et al.

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