Patent ID: 6773643
Filing Date: 2004-08-10
Classification: B05D,B29C,B44F,C04B

Abstract:
A continuous method of incorporating a burl appearance into solid surface material comprising the steps of:a) forming two separate acrylic resin suspension streams with a first stream having i) a viscosity in a range from 500 to 3,000 centipoise, ii) a density in a range from 1.5 to 1.7 grams per milliliter and iii) a surface tension in a range from 35 to 45 dyne per centimeter and a second stream having i) a viscosity in a range from 500 to 3,000 centipoise and ii) a density in a range from 1.6 to 1.8 gram per milliliter with the proviso that the second stream has a density of at least 0.05 gram per milliliter more than the first stream and the second stream has a surface tension of at least 0.5 dyne per centimeter greater than the first stream, b) continuously feeding one of the streams into a mixing chamber, c) continuously injecting the other stream into the stream within the mixing chamber wherein partial mixing takes place, d) flowing the partially mixed streams onto a support and e) curing the two suspensions whereby a series of three-dimensional burls are formed.