Stain blocking barrier layer

Details Stain blocking barrier layer Stain blocking barrier layer

1999-09-17

2001-10-09

Nakarani, D. S. (Department: 1773)

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

C428S423100, C428S423300, C428S424400

Reexamination Certificate

active

06299974

ABSTRACT:

BACKGROUND OF THE INVENTION
The present invention relates to a stain blocking barrier layer for use in surface covering products and a method for making the surface covering products (e.g., decorative inlaid floor coverings and wallpaper) containing the barrier layer. More particularly, the present invention relates, in part, to a stain blocking barrier layer capable of preventing stains, such as dyes, from diffusing from a surface on which the surface covering is placed, or topical stains resulting from contact on the surface of the covering.
Current surface coverings such as vinyl flooring, consistently have the problem of stains diffusing from a surface, such as a sub-floor or floor mat located on or beneath the surface covering, onto and through the surface covering to the extent the stain is undesirably visual to the consumer. The cause of such stains can be, for example, coated nails, ink markers, adhesives, pens, wood extractives, or dyes. To date, prevention of the migration of stains has not been effective and there is a need to develop a stain blocking product for surface coverings which will effectively block the diffusion of such stains from a lower surface.
SUMMARY OF THE INVENTION
A feature of the present invention is to provide a stain blocking barrier layer to be incorporated into surface covering products which will prevent the diffusion of stains onto and through the surface covering from a surface or object located directly on or beneath the surface covering.
An additional feature of the present invention is to provide a process for making surface covering products containing the stain blocking barrier layer of the present invention.
Additional features and advantages of the present invention will be set forth in part in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. The objectives and other advantages of the present invention will be realized and attained by means of the elements and combinations particularly pointed out in the written description including the drawings and appended claims.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, the present invention relates to a stain blocking barrier layer for use in surface covering products. The stain blocking barrier layer contains at least one polyamide or polyurethane compound capable of substantially preventing stain diffusion through a surface covering.
The present invention also relates to surface coverings containing these barrier layers or coatings of the present invention.
Additionally, the present invention relates to a method of preventing stain diffusion through surface coverings by including, as part of the surface covering, a barrier layer or coating of the present invention.
Lastly, the present invention relates to a method of providing surface coverings containing the barrier layer which includes the step of applying the barrier layer or coating of the present invention.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are intended to provide further explanation of the present invention, as claimed.
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the present invention and together with the description, serve to explain the principles of the present invention.


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