Laminate
AssigneeHoechst Aktiengesellschaft
InventorsWolfgang Greiser, Kurt Plotz, Hans Wagner, Karl-Christian Zerfass
Life of this patent
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Abstract
A laminate which, when used as a carrier web for roofing and sealing sheets, shows good flammability properties combined with improved mechanical properties and which comprises a layer of synthetic fibers and a layer of mineral fibers is obtained by needling two preconsolidated fiber webs, of which one comprises synthetic fibers and the other mineral fibers. The needling produces a strong positive join of the two webs, as a result of which the tendency for the two layers to delaminate under extreme thermomechanical conditions is avoided.
Claims6
A laminate as a carrier web for roofing and sealing sheets made of a layer of synthetic fibers and a layer of mineral fibers, comprising a non-woven of synthetic fiber preconsolidated by needling or by a binder and a nonwoven of mineral fiber preconsolidated by needling or by a binder which, after preconsolidation, are bonded to each other by needling, wherein the weight of the synthetic fiber nonwoven is 50 to 350 g/m.sup.2, and the individual denier is a 3 to 8 dtex, the mineral fiber nonwoven has a weight between 30 to 60 g/m.sup.2, and wherein 10 to 100 needling stitches per cm.sup.2 have been applied.
A laminate as a carrier web for roofing and sealing sheets made of a layer of synthetic fibers and a layer of mineral fibers, comprising a non-woven of synthetic fiber preconsolidated by a binder and a nonwoven of mineral fiber preconsolidated by a binder which, after preconsolidation, are bonded to each other by needling, wherein the weight of the synthetic fiber nonwoven is 50 to 350 g/m.sup.2, and the individual denier is 3to 8 dtex, the mineral fiber nonwoven has a weight between 30 and 60 g/m.sup.2, and wherein 10 to 100 needling stitches per cm.sup.2 have been applied.
A laminate as a carrier web for roofing and sealing sheets made of a layer of synthetic fibers and a layer of mineral fibers, comprising a non-woven of synthetic fiber preconsolidated needling and a nonwoven of mineral fiber preconsolidated by a binder which, after preconsolidation, are bonded to each other by needling, wherein the weight of the synthetic fiber nonwoven is 50 to 350 g/m.sup.2, and the individual denier is 3 to 8 dtex, the mineral fiber nonwoven has a weight between 30 and 60 g/m.sup.2, wherein 10 to 100 needling stitches per cm.sup.2 have been applied.
Dependencies are inferred from the claim text.