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US 4,180,615 AGranted
Vinyl tile and production thereof
AssigneeGAF Corporation
InventorPhilip S. Bettoli
Life of this patent
Estimating the term…
Abstract
Vinyl floor or wall tile is surfaced with a clear, durable wear layer. The wear layer comprises urethane compound photo-polymerized from a fluid coating composition having a volatility of at least 2 percent and comprising at least 2 photo-polymerizable ethylenically unsaturated groups of the general structure: ##STR1## where R is either H or CH.sub.3. The wear layer is applied to a continuous sheet of vinyl composition traveling at a rate of at least about 80 ft./min. at a temperature of at least about 110.degree. F., and cured by exposure to ultra-violet radiation.
Claims21
A continuous process for producing an improved vinyl tile comprising:
- (a) calendering a uniform mix comprising filler, vinyl chloride polymer and plasticizer to form a continuous vinyl sheet having a thickness of from about 1/16" to about 1/8", said continuous sheet being discharged from the calendering zone at a travel rate of at least about 80 ft./min.;
- (b) coating the thus-formed continuous vinyl sheet traveling essentially at said travel rate with a layer between about 1 and about 5 mils thick of a substantially solvent free fluid coating composition having a volatility of less than about 2percent and comprising urethane compound having at least two photo-polymerizable ethylenically unsaturated groups of the general structure:
- ##STR15## where R is either H or CH.sub.3, said layer of coating composition being capable of curing upon exposure to ultraviolet light to form a hard, clear layer adherent to said vinyl sheet;
- (c) exposing the thus-coated sheet traveling essentially at said rate of at least about 80 ft/min. to ultraviolet light having wavelengths within the range of from about 2500.degree. A to about 4000.degree. A at a temperature of from about 110.degree. F. to about 220.degree. F., the radiation intensity level being sufficient to initiate the desired curing of the coating within an ultraviolet exposure time of from about 0.2 sec. to about 15 sec. and
- (d) passing the thus-treated sheet traveling essentially at said rate to a cutting zone and therein cutting the thus-coated and treated sheet at a temperature of not less than about 120.degree. F. to form individual tiles having a clear wear layer thereon.
2 more elements
An improved vinyl tile comprising:
- (a) thermoplastic base tile comprising filler, vinyl chloride, polymer and plasticizer;
- and
- (b) a clear, durable wear layer adhering to the surface of said base tile and having a thickness of from about 1 to about 5 mils, said wear layer comprising urethane compound photo-polymerized by an exposure to ultraviolet light at from about 110.degree. F. to about 220.degree. F. for from about 0.2 to about 15 sec., said wear layer being photo-polymerized from a fluid coating composition having a volatility of less than about 2 percent and comprising urethane compound having at least two photo-polymerizable ethylenically unsaturated groups of the general structure:
- ##STR23## where R is either H or CH.sub.3.
1 more element
A continuous process for producing an improved vinyl tile comprising:
- (a) calendering a uniform mix comprising filler, vinyl chloride polymer and plasticizer to form a continuous vinyl sheet having a thickness of from about 1/16" to about 1/8", said continuous sheet being discharged from the calendering zone at a travel rate of at least about 80 ft./min.;
- (b) coating the thus-formed continuous vinyl sheet traveling essentially at said travel rate with a layer between about 1 and about 5 mils thick of a substantially solvent free fluid coating composition comprising urethane compound having at least two photo-polymerizable ethylenically unsaturated groups of the general structure:
- ##STR31## where R is either H or CH.sub.3, said layer of coating composition being capable of curing upon exposure to ultraviolet light to form a hard, clear layer adherent to said vinyl sheet;
- (c) exposing the thus-coated sheet traveling essentially at said rate of at least about 80 ft/min. to ultraviolet light having wavelengths within the range of from about 2500.degree. A. to about 4000.degree. A. at a temperature of from about 100.degree. F. to about 220.degree. F., the radiation intensity level being sufficient to initiate the desired curing of the coating within an ultraviolet exposure time of from about 0.2 sec. to about 15 sec. and
- (d) passing the thus-treated sheet traveling essentially at said rate to a cutting zone and therein cutting the thus-coated and treated sheet at a temperature of not less than about 120.degree. F. to form individual tiles having a clear wear layer thereon.
2 more elements
An improved vinyl tile comprising:
- (a) thermoplastic base tile comprising filler, vinyl chloride, polymer and plasticizer;
- and
- (b) a clear, durable wear layer adhering to the surface of said base tile and having a thickness of from about 1 to about 5 mils, said wear layer comprising urethane compound photo-polymerized by an exposure to ultraviolet light at from about 110.degree. F. to about 220.degree. F. for from about 0.2 to about 15 sec, said wear layer being photopolymerized from a fluid coating composition comprising urethane compound having at least two photo-polymerizable ethylenically unsaturated groups of the general structure:
- ##STR32## where R is either H or CH.sub.3.
1 more element
Dependencies are inferred from the claim text.