Continuous solid state web coating process and webs produced thereby
AssigneeKoslow Technologies Corporation
InventorsEvan E. Koslow, Richard D. Kendrick, Gordon Spilkin
Life of this patent
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Abstract
One or more particulate active agents are fused to the surface of a substrate web by mixing the particulate agents with a particulate binder having a particle size not exceeding an average diameter of approximately 40 microns and coating the composite mixture onto the surface of the substrate. Thereafter, the coated substrate is heated to a temperature equal to or greater than the Vicat softening temperature of the binder and compressed within the nip of a pair of pressure rolls to achieve fusion. If desired, a top layer may be placed upon the coated composite prior to the compression step. Also disclosed are various products manufactured by the process.
Claims15
A first substrate web having a first surface upon which is deposited a particulate iodinated resin and particles of a thermoplastic binder fused to both of said particulate resin and said first surface.
A first substrate web having a first surface upon which is deposited particulate sodium bicarbonate and particles of a thermoplastic binder fused to both of said particulate sodium bicarbonate and said first surface.
A first substrate web having a first surface upon which is deposited particulate manganese oxide and particles of a thermoplastic binder fused to both of said particulate manganese oxide and said first surface.
A composite structure comprising a first substrate having a first surface upon which is deposited a composite powder, said composite powder having particulate carbon and particles of a thermoplastic binder, wherein said particles of a thermoplastic binder coalesces said particulate carbon, and wherein said particles of a thermoplastic binder adhere said particulate carbon to said first surface.
A composite structure comprising a first substrate having a first surface upon which is deposited a composite powder, said composite powder having particles of a polymer liquid absorbent and particles of a thermoplastic binder, wherein said particles of a thermoplastic binder coalesces said particles of a polymer liquid absorbent, and wherein said particles of a thermoplastic binder adhere said particles of a polymer liquid absorbent to said first surface.
A composite web comprising:
- a substrate web having a surface;
- a composite powder mixture deposited on the surface of the substrate web in an amount up to about 0.36 g/cm.sup.2, the composite powder mixture comprising:
- about 5 to 30 weight percent thermoplastic binder particles which have an effective diameter in the range of about 5 to 95 microns, and
- about 70 to 95 weight percent active agent particles having an effective diameter in the range of about 5 to 5000 microns,
- wherein the thermoplastic binder particles are fused to the surface of the substrate web and the active agent particles.
Dependencies are inferred from the claim text.