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US 10,472,751 B2Granted
Thermofusible sheet material
AssigneeCarl Freudenberg KG
InventorsSteffen Traser, Steffen Kremser
Life of this patent
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Abstract
A thermofusible sheet material which can be used as a fusible interlining in the textile industry, has a carrier layer made from a textile material to which a polyurethane foam coating is applied. The polyurethane foam has a pore structure in which more than 50% of the pores have a diameter, measured according to DIN ASTM E 1294, which is in the range of 5 to 30 μm.
Claims22
A thermally fusible fabric, configured for a fusible interlining in the textile industry, the fabric comprising:
- a substrate comprising a textile material to which a coating of polyurethane foam is applied,
- wherein the polyurethane foam comprises a thermoplastic polyurethane comprising, in reacted form,
- a bifunctional polyisocyanate (A) having an isocyanate content of from 5 to 65 wt. %,
- a polyol (B) comprising a polyester polyol, polyether polyol, polycaprolactone polyol, polycarbonate polyol, copolymer of polycaprolactone polyol, polytetrahydrofuran, or a mixture of two or more of any of these, and
- a chain extender (C),
- wherein the polyurethane foam has a pore size distribution in which more than 50% of the pores have a diameter of from 5 to 30 μm, as measured according to DIN ASTM E 1294.
3 more elements
A method for producing a thermally fusible fabric, the method comprising:
- a) providing a substrate,
- b) foaming a polyurethane dispersion comprising a thermoplastic polyurethane comprising, as a transformation product,
- a bifunctional polyisocyanate (A) having an isocyanate content of from 5 to 65 wt. %;
- a polyol (B) comprising a polyester polyol, polyether polyol, polycaprolactone polyol, polycarbonate polyol, copolymer of polycaprolactone polyol, polytetrahydrofuran, or a mixture of two or more of any of these;
- and
- a chain extender (C), thereby forming a polyurethane foam having a pore size distribution in which more than 50% of the pores have a diameter of from 5 to 30 μm, as measured according to DIN ASTM E 1294;
- c) applying the polyurethane foam to one or more surface regions of the substrate, thereby obtaining a treated substrate;
- and
- d) heat-treating the treated substrate to dry and simultaneously bond the polyurethane foam to the substrate, forming a coating.
6 more elements
Dependencies are inferred from the claim text.