技术功效语段：
It is another object of the present invention to produce decorative high pressure laminates, having registered color and embossing, in a simplified and inexpensive manner.
It is another object of the present invention to provide a new and improved method for inexpensively manufacturing high pressure laminates having registered color and embossing.
It is another object of the present invention to provide a transfer procedure for producing relatively low cost, high pressure decorative laminates having registered color and embossing.
In aqueous form, in order to have the proper effect in use, the composition should fall within the following range: for 100 parts of conventional aqueous methylol melamine resin of 40—60% solids there should be based on such solids, 0.5-2% surfactant, 10-100% pigment, 1-20% silica, 1—20% polyol or glycol and sufficient reducer, such as a 50-50 mixture of isopropyl alcohol and water, to provide a desirable printing viscosity.
The thermosetting melamine resin serves as ink vehicle, pigment binder and compatible resin to produce the suitable high pressure laminate. The surfactant, which may be any compatible detergent, aids in pigment dispersion and substrate wetting. The pigment, to which soluble dyes may be added, imparts hiding power, opacity and color. The silica or other suitable powdered filler imparts thickening and anti-settling properties to the ink composition. The polyol or glycol improves the workability of the liquid ink and retards its spoiling; it also imparts flexibility to the dry ink film 12 before transfer to the laminate, The reducer, which may be any compatible inert liquid, is provided for viscosity adjustment.
Some of the advantages of the present invention are: the ink printed sheet or plate 14 is handled as a single unit which is capable of simultaneously embossing and coloring a high pressure laminate with proper registry. The chance of the embossing medium and the color medium shifting out of registry during production, handling and processing, is greatly reduced—this can happen only if the ink runs—and this provides a new result which, with the exception of the invention set forth in copending application Ser. No. 62,780, now Pat. No. 3,661,672, has not been possible with past attempts.
权利要求：
What is claimed is:
1. A method of forming a unitary high pressure laminate having registered color and embossing comprising:
(1) providing an embossed plate having an ink layer printed thereon in exact registry with the embossing on the plate, said ink layer being capable of transferring to a laminate without sideways migration and also being capable after curing of meeting NEMA standards, said ink consisting esentially of a methylol melamine resin and coloring agent mixture advanced to the B stage of cure;
(2) assembling in a stack said embossed plate with said ink overprint coating, and a plurality of resin impregnated sheets with said ink overprint coating facing said resin impregnated sheets;
(3) pressing said stack under a pressure of approximately 800-1,600 p.s.i. at a temperature on the order of 230°-310° F. to laminate said resin impregnated sheets together, to emboss said sheets in conformance with the embossing on said embossed plate and to transfer said ink layer from the surface of said embossed plate into the surface of said laminate in exact registry with said embossing, said embossed high pressure laminate meeting NEMA standards; and
(4) stripping said embossed plate from said laminate thereby providing the unitary high pressure laminate having on the upper surface thereof a first colored area at a first level and a second colored area at a second level.
2. A method in accordance with claim 1 comprising, as a preliminary operation: providing an embossed plate;
printing on said embossed plate in registry with the embossing a melamine ink composition comprising aqueous
methylol melamine resin, pigment, silica, surfactant and diluent; applying heat to evaporate the diluent and to cure the melamine resin to the B stage thereby providing said embossed plate having a B-stage melamine resin ink
layer printed thereon.
3. A method in accordance with claim 1 comprising as a preliminary operation: providing an embossed plate; printing on said embossed plate in registry with the embossing a melamine ink composition comprising (a) particles of size up to 149 microns consisting essentially of a mixture of pigment and melamine resin in the B-stage, (b) polymeric binder and (c) a liquid serving as diluent for said particles and solvent for said polymeric binder;
applying heat to evaporate the liquid diluent-solvent thereby providing said embossed plate having a B-stage
elamine resin ink layer printed thereon.
4. A high pressure laminate produced in accordance
with the method of clai
it?