Soft hand copolyamide composition
View Patent ↗Composition comprising, on a weight basis, the total being equal to 100%: from 98% to 100% of at least one copolyamide bearing amide units and polyether units, having a melting point (T m ) from about 90 to about 150° C., in particular from about 100° C. to about 125° C., and having a flexural modulus of less than 100 MPa, as determined according to standard ISO 178 (2010); from 0 to 2% of at least one additive chosen from stabilizers and dyes, or a mixture thereof, for the manufacture of a heat-sensitive adhesive, in particular a veil, a film, granules, a filament, a grate, a powder or a suspension.
1. A method of using a heat-sensitive adhesive in the textile industry, comprising the steps of:
a) forming a heat-sensitive adhesive composition of a HMA (hot-melt adhesive), consisting of on a weight basis, the total being equal to 100%:
from 98% to 100% of at least one copolyamide bearing amide units and polyether units, having a melting point (T m ) from about 100° C. to about 125° C., and having a flexural modulus less than 100 MPa, as determined according to standard ISO 178 (2010); the said amide unit being 6/12, with a weight proportion of the long chain aliphatic repeat unit C12 of the amide unit being from 70% to 80%, the polyether units being derived from polytetramethtylene glycol (PTMG), the weight proportion of polyether units in the copolyamide being greater than 50%,
from 0 to 2% of at least one additive chosen from stabilizers and dyes, or a mixture thereof wherein said heat-sensitive adhesive is selected from the group consisting a veil, a film, in granules, a filament, and a grate;
b) melting said heat-sensitive composition by heating;
c) applying said adhesive to two parts of a textile;
d) allowing said heat-sensitive adhesive composition to cool.
2. The method of claim 1 , wherein said method results in end-to-end bonding of the two parts of a textile.
3. The method of claim 1 , wherein said Method results in two parts of a textile joined together without stitching.
4. The method according to claim 1 , said adhesive having a thickness of from 5 to 30 micrometers for a veil, 20 to 100 micrometers for a film and 10 to 50 micrometers for a grate, and said adhesive having an adherence to a textile, of greater than 3 N/cm, as determined by the T peel test at 100 mm/min.
5. The method according to claim 4 , said adhesive having an adherence to a textile, of greater than 5 N/cm, as determined by the T peel test at 100 mm/min.
6. The method according to claim 4 , wherein the adherence is determined at a lamination temperature of from 120 to 180° C.
7. The method according to claim 1 , having a loss of adherence after at least two washes at 40° C. from about 2% to about 18%.
8. The method according to claim 1 having a loss of adherence after at least two washes at 60° C. from about 2% to about 30%.