| 摘要 |
<p>1525135 Laminates BUCKEYE CELLULOSE CORP 2 Dec 1975 [2 Dec 1974] 49512/75 Heading B5N In a method of making a laminate, a continuous non-woven material of basis weight 0À3 to 0À8 ozs./sq. yd., being unbonded or having up to a maximum of 2% of possible cross-over points spun-bonded is impregnated with an aqueous latex emulsion containing latex binder solids having a glass transition temperature of from 10‹ C. to -80‹ C. and a fach test of 2 to 40 pounds, the weight of latex solids being from 50 to 120% of the weight of the material before combining the moist impregnated material with a tissue facing layer on each surface, each tissue layer having a basis weight of 7 to 18 lbs. per 3,000 sq, ft., under a pressure insufficient to cause compaction of the laminate but permitting penetration of the latex on to the tissue layers, and drying the product. The filaments may be of polyester, polyamide or polyolefinefilaments and the latex binder solids copolymers of acrylates, vinyl acetate-ethylene copolymers, styrene-butadiene copolymers, vinyl chloride polymers, vinylidene chloride polymers, vinyl and vinylidene chloride copolymers, acrylonitrile copolymers and ethylene-acrylate copolymers.</p> |
