Back to results
US 9,752,016 B2Granted
Microtextured films with improved tactile impression and/or reduced noise perception
AssigneeThe Procter & Gamble Company
InventorsNorman Scott Broyles, April Renae Brown, Arman Ashraf, Gary Wayne Gilbertson, Jeffrey Thomas Grothaus
Life of this patent
Estimating the term…
Abstract
A film layer having a micro-textured surface is provided. The film layer has a continuous phase with one or more thermoplastic polymers, wherein at least one of the thermoplastic polymers is a low-modulus polymer having a 2% secant modulus of less than or equal to 140 MPa, and the film has from 10 wt % to 100 wt % of the low modulus thermoplastic polymer. The film layer also has a discrete phase with from 5 wt % to 45 wt % of a thermoplastic starch.
Claims11
A method of making a film layer having a micro-textured surface, comprising:
- extruding a heated film composition through an annular die to form a tube comprising the film composition, wherein the film composition comprises from 10wt % to 45 wt % of a thermoplastic starch, from 0.05 wt % to 0.5 wt % of a surface migratory agent, and from 10 wt % to 100 wt % of a low modulus thermoplastic polymer having a 2% secant modulus from about 30 MPa to about 75MPa;
- cooling the tube;
- and
- forming a film layer from the tube, the film layer having a micro-textured surface and a continuous phase and a discrete phase comprising the thermoplastic starch, wherein the film layer has a has a 2% secant modulus in the MD direction greater than 160 MPa.
1 more element
Dependencies are inferred from the claim text.