Films having structured surface and methods for making the same
OwnerRonald W. Ausen, Stephen W. Bany +5inventors
InventorsRonald W. Ausen, Stephen W. Bany, Joan C. Fretag, Jay M. Jennen, Eugene G. Joseph, Sasha B. Myers, Shou-Lu G. Wang
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Abstract
A film, and method of producing, wherein the film (4) comprises crystalline polylactide, wherein the film is continuous and has an embossed, structured surface (5,6) comprising structure (s) in the form of a negative imprint of a tool roll structured surface, and function wherein the structure (s) of the embossed, structured surface are retained upon heating the film of up to 130° C.
Claims20
A process for forming a film, the process comprising:
- applying a molten composition comprising polylactide to a tool roll having a structured surface, wherein the tool roll is at a temperature above the Tg and below the Tm of the polylactide-containing composition;
- allowing the molten composition to remain in contact with the tool roll for a time sufficient to convert at least a portion of the polylactide to crystalline polylactide;
- and
- removing a film comprising crystalline polylactide from the tool roll;
- wherein the film is continuous and has an embossed, structured surface comprising structure(s) in the form of a negative imprint of the tool roll structured surface;
- and further wherein the structure(s) of the embossed, structured surface are retained upon heating the film at a temperature of up to 130° C.
A film comprising polylactide having at least 1 wt-% crystallinity, wherein the film is continuous and comprises an embossed, structured surface comprising structure(s) in the form of a negative imprint of a tool roll structured surface, wherein the structure(s) are retained upon heating the film at a temperature of up to 130° C.
A tape comprising a film having at least one surface with a layer of adhesive disposed thereon, wherein the film comprises polylactide having at least 1 wt-% crystallinity, and wherein the film is continuous and comprises an embossed, structured surface comprising structure(s) in the form of a negative imprint of a tool roll structured surface, wherein the structure(s) are retained upon heating the film at a temperature of up to 130° C., and further wherein the structured surface comprises a matte finish.
A hook and loop fastener comprising a film comprising polylactide having at least 1 wt-% crystallinity, wherein the film is continuous and comprises an embossed, structured surface comprising structure(s) in the form of a negative imprint of a tool roll structured surface, wherein the structure(s) are retained upon heating the film at a temperature of up to 130° C., and further wherein the structured surface comprises a plurality of hooks.
Dependencies are inferred from the claim text.