Asphalt water-proofing material
AssigneesMitsui Petrochemical Industries, Ltd., Mitsuboshi-Sangyo Co., Ltd.
InventorsHajime Iwasaki, Kuninori Mizuta, Yoshinori Kobayashi, Tadayoshi Yoshikawa, Kyouzi Muraoka
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Abstract
An asphalt water-proofing material comprising a core impregnated with petroleum asphalt. The core is made of composite material including a non-woven fabric layer formed of long filaments of synthetic resin arranged in random fashion and a woven or knitted fabric layer. The non-woven fabric and woven or knitted fabric layers are connected together by needle-punching whereby the long filaments of the non-woven fabric layer are forced into the woven or knitted fabric layer to integrally connect these layers to form said core.
Claims10
An asphalt water-proofing material comprising a composite material including a non-woven fabric layer made of long filaments of synthetic resin arranged in random fashion and a woven or knitted fabric layer, said layers being connected together by needle-punching to form the integral composite material, and a petroleum asphalt saturating said composite material, said petroleum asphalt having softening point of 70.degree.-120.degree. C. and penetration of 10-60 at 25.degree. C., said composite material and/or asphalt water-proofing material having tensile strength of at least 6 kg/10 mm width in longitudinal direction and at least 4 kg/10 mm width in lateral direction at the time of 3% elongation thereof and elongation of at least 50%, thereby providing superior crumpling-resistant, shrinkage-resistant, restoring, crack-resistant or other fatigue-resistant properties.
Dependencies are inferred from the claim text.