A roofing underlayment comprises a reinforcing layer, which is extrusion coated on at least one side with an anti-slip coating layer. The reinforcing layer comprises a woven polyethylene or polypropylene scrim. The anti-slip coating layer comprises a compound based on a styrene and ethylene/butylene
A roofing underlayment comprises a reinforcing layer, which is extrusion coated on at least one side with an anti-slip coating layer. The reinforcing layer comprises a woven polyethylene or polypropylene scrim. The anti-slip coating layer comprises a compound based on a styrene and ethylene/butylene-styrene, S-E/B-S, block copolymer, such as the compound sold under the trademark KRATON® MD6649. The anti-slip coating layer may also be embossed. The anti-slip coating layer is low in cost and helps prevent water from penetrating the primary roofing material. In addition, the anti-slip coating layer provides an improved anti-skid surface upon which an individual may safely walk. Embossment improves the wet slip resistance of the roofing underlayment.
대표청구항▼
What is claimed is: 1. A roofing underlayment comprising: a reinforcing layer comprising: an upper surface anti-slip coating layer comprising: a core layer comprising 2% UV stabilizer, 10% Beige pigment, 4% anti-block, 20% low density polyethylene, and 64% h-homopolymer polypropylene; and a skin la
What is claimed is: 1. A roofing underlayment comprising: a reinforcing layer comprising: an upper surface anti-slip coating layer comprising: a core layer comprising 2% UV stabilizer, 10% Beige pigment, 4% anti-block, 20% low density polyethylene, and 64% h-homopolymer polypropylene; and a skin layer comprising 2% UV stabilizer, 10% Beige pigment, 8% anti-block, 15% low density polyethylene, and 65% S-E/B-S block copolymer compound comprising about 30%-75% by weight styrene-ethylene/butylene-styrene, about 0%-50% by weight resin, and about 0.1-2% by weight antioxidant/stabilizer/dusting agent; and a lower surface anti-slip coating layer; wherein the anti-slip coating comprises a styrene and ethylene/butylene-styrene (S-E/B-S) block copolymer, wherein the upper surface anti-slip coating layer has a thickness of about 0.5 mils to 4 mils, wherein the lower surface anti-slip coating layer has a thickness of about 0.5 mils to 4 mils, and wherein the roofing underlayment is embossed with a pattern. 2. The roofing underlayment according to claim 1, wherein the reinforcing layer comprises a woven polyethylene scrim. 3. The roofing underlayment according to claim 1, wherein the reinforcing layer comprises a woven polypropylene scrim. 4. The roofing underlayment according to claim 1, wherein the reinforcing layer comprises a nonwoven layer. 5. The roofing underlayment according claim 1, wherein: the reinforcing layer comprises a woven polypropylene scrim; the lower coating layer comprises 73.5% thermoplastic olefin resin, 8.0% low density polyethylene, 2% U.V. stabilizer, 10.5% White MasterBatch, and 6% anti-block; and wherein the core layer and the skin layer are coextruded onto the scrim; and wherein the core layer comprises 70% by weight of the upper coating layer and the skin layer comprises 30% by weight of the upper coating layer. 6. The roofing underlayment according to claim 1, wherein the embossment is a diamond pattern. 7. The roofing underlayment according to claim 6, wherein the diamond pattern comprises interlocking diamond shapes. 8. The roofing underlayment according to claim 1, wherein embossment is provided by applying heat and pressure while the roofing underlayment is run through a nip assembly. 9. The roofing underlayment according to claim 8, wherein the nip assembly contains a positive of a pattern to be embossed on the anti-slip coating layer. 10. The roofing underlayment according to claim 1, wherein the embossment is applied by extrusion coating onto a patterned chill roll. 11. The roofing underlayment according to claim 1, wherein the embossment is applied by direct embossment. 12. The roofing underlayment according to claim 11, wherein the direct embossment is carried out after a smooth chill rolling. 13. A roofing underlayment comprising: a reinforcing layer comprising: an upper surface anti-slip coating layer comprising: a core layer; and a skin layer; and a lower surface anti-slip coating layer; and wherein the reinforcing layer comprises a woven polypropylene scrim; the core layer comprising 1% U.V. stabilizer, 10% Beige pigment, 8% low density polyethylene, and 81% homo-polymer polypropylene; and wherein the skin coating layer comprises 2% UV stabilizer, 10% Beige pigment, 8% anti-block, 10% homo-polymer polypropylene, and 70% S-E/B-S block copolymer compound comprising about 30-75% by weight styrene-ethylene/butylene-styrene, about 0%-50% by weight resin, and about 0.1%-2% by weight antioxidant/stabilizer/dusting agent; and wherein the lower coating layer comprises 73.5% thermoplastic olefin resin, 8.0% low density polyethylene, 2% UV stabilizer, 10.5% white masterbatch, and 6% anti-block; wherein the core layer and the skin layer are coextruded onto the scrim, and wherein the core layer comprises 70% by weight of the upper coating layer and the skin layer comprises 30% by weight of the upper coating layer.
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이 특허에 인용된 특허 (1)
Di Pede, Sandro, Multilayer slip resistant sheet material.
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