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US 2013/0210304 A1Published application
Breathable nonwoven composite
AssigneeBorealis AG
InventorsAntti Tynys, Philippe Gilles, Joachim Fiebig, Henk Van Paridon, Bert Broeders, Wilhelmus Henricus Adolf Sars, Nina Ackermans
Life of this patent
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Abstract
Coated nonwoven fabric comprising a nonwoven fabric layer and a coating, said coating comprises a polymer having a branching index g′ of equal or below 0.9.
Claims16
Composite comprising:
- (a) a nonwoven fabric (NF) being the substrate of the composite, said nonwoven fabric (NF) comprises a polymer (P-1) selected from the group consisting of polyethylene (PE-1), polypropylene (PP-1), polyethylene terephthalate (PET) and polyamid (PA), and
- (b) a coating layer (CL) overlaying at least one surface of the nonwoven fabric (NF), said coating layer (CL) comprises a polymer (P-2) being either a polypropylene (PP-2) or a polyethylene (PE-2), wherein the coating layer (CL) and/or the polymer (P-2) has (have)
- (i) a branching index g′ of equal or below 0.9, and/or
- (ii) a strain hardening factor (SHF) of at least 2.0 measured at a strain rate of 3.0 s−1 and a Hencky strain of 2.5.
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Composite comprising:
- (a) a nonwoven fabric (NF) being the substrate of the composite, said nonwoven fabric (NF) comprises a polymer (P-1) selected from the group consisting of polyethylene (PE-1), polypropylene (PP-1), polyethylene terephthalate (PET) and polyamid (PA), and
- (b) a coating layer (CL) overlaying at least one surface of the nonwoven fabric (NF), said coating layer (CL) comprises a polymer (P-2) being either a polypropylene (PP-2) or a polyethylene (PE-2), wherein the coating layer (CL) and/or the polymer (P-2) has (have);
- (i) a LAOS non-linearity factor (LAOS-NLF) measured according to the LAOS method of at least 2.5, and/or
- (ii) a F30 melt strength of at least 3.0 cN at 200° C. determined by the Rheotens test.
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Dependencies are inferred from the claim text.