MICROWAVE CURING OF UNCURED LATEX CARPET
First Claim
Patent Images
1. A floor covering comprising:
- a primary backing having a fibrous face and an underside; and
a microwave cured precoat layer on the underside of the primary backing.
1 Assignment
0 Petitions
Accused Products
Abstract
There is disclosed a floor covering comprising a primary backing having a fibrous face and an underside; and a microwave cured precoat layer on the underside of the primary backing. There is also disclosed herein a method of making a floor covering comprising: tufting or implanting a fibrous material or yarn into a primary backing; precoating the underside of the primary backing layer by applying a precoating composition followed by microwave curing the precoating. An apparatus for curing a precoated primary backing layer also described.
-
Citations
7 Claims
-
1. A floor covering comprising:
-
a primary backing having a fibrous face and an underside; and a microwave cured precoat layer on the underside of the primary backing.
-
-
2. A method of making a floor covering comprising:
-
tufting or implanting a fibrous material or yarn into a primary backing; precoating the underside of the primary backing layer by applying a precoating composition followed by microwave curing the precoating.
-
-
3. A floor covering comprising:
-
a primary backing having a fibrous face and an underside; a microwave cured precoat layer on the underside of the primary backing; and a backing layer fixed to the primary backing.
-
-
4. A method of making a floor covering comprising:
-
tufting or implanting a fibrous material or yarn into a primary backing; precoating the underside of the primary backing layer by applying a precoating composition followed by microwave curing the precoating; applying a backing layer to the precoated primary backing layer; and if necessary curing the backing layer.
-
-
5. A method of making a floor covering comprising:
-
coating a first layer of a thermoplastic resin plastisol on a support surface; optionally placing a dimensionally stable sheet material onto the top surface of the first layer and heating the layer to gel the layer and position the sheet material; optionally applying a second layer of a thermoplastic resin plastisol onto the gelled surface of the first layer; tufting or implanting a fibrous material or yarn into a primary backing material; precoating the underside of the primary backing and curing the precoating using microwaves; optionally coating a thermoplastic resin plastisol over the precoat layer; layering the precoated primary backing onto the top surface of the plastisol of the first or second thermoplastic resin layer to form a floor covering; heating the floor covering so formed to fuse the thermoplastic layers into an integrally-fused backing layer; cooling the flooring covering; and optionally cutting the floor covering into a carpet tile. - View Dependent Claims (6)
-
-
7. An apparatus for curing a precoated primary backing layer, the apparatus comprising:
-
a microwave generator for generating microwaves; a single pass or multipass slotted waveguide applicator; and means for forwarding a primary backing layer having an uncured precoated provided thereon into the waveguide applicator.
-
Specification