Polyester film with smooth surface properties for winding and printing
AssigneeToray Plastics (America), Inc.
InventorsDouglas J. Bower, Hideaki Maeba
Life of this patent
Estimating the term…
Abstract
A substrate composite film for thermal transfer printing includes a biaxially oriented base layer including polyester, a first type of lubricant particles, and a second type of lubricant particles. The substrate composite film satisfies the following: (1) a ratio of maximum height SRma and peak count SPc is 1≦SRma/SPc≦4.5, (2) a center plane average roughness Sra is 15 to 30 nm, (3) coefficient of dynamic friction is <0.60, and (4) 20 and 60 degree gloss is greater than 160 SGU. The 20 degree gloss may be equal in all directions, and the 60 degree gloss may be equal in all directions.
Claims23
A substrate composite film for thermal transfer printing comprising:
- a sequentially biaxially oriented layer comprising polyester, a first type of lubricant particles, and a second type of lubricant particles,
- wherein the substrate composite film satisfies the following:
- (1) a ratio of maximum height SRma and peak count SPc is 1≦SRma/SPc≦4.5,
- (2) a center plane average roughness Sra is 15 to 30 nm,
- (3) coefficient of dynamic friction is <0.60,
- (4) 20 and 60 degree gloss is greater than 160 SGU.
A method of making a substrate composite film comprising:
- extruding a layer comprising polyester, a first type of lubricant particles, and a second type of lubricant particles;
- and
- sequentially biaxially orienting the layer,
- wherein the substrate composite film satisfies the following:
- (1) a ratio of maximum height SRma and peak count SPc is 1≦SRma/SPc≦4.5,
- (2) a center plane average roughness Sra is 15 to 30 nm,
- (3) coefficient of dynamic friction is <0.60, and
- (4) 20 and 60 degree gloss is greater than 160 SGU.
A film structure for thermal transfer printing comprising:
- a sequentially biaxially oriented layer comprising polyester, a first type of lubricant particles, and a second type of lubricant particles;
- an adhesive layer on a surface of the sequentially biaxially oriented layer;
- a colored dye coating on the adhesive layer;
- and
- a low friction coating on a surface of the sequentially biaxially oriented opposite the adhesive layer,
- wherein the film structure satisfies the following:
- (1) a ratio of maximum height SRma and peak count SPc is 1≦SRma/SPc≦4.5,
- (2) a center plane average roughness Sra is 15 to 30 nm,
- (3) coefficient of dynamic friction is <0.60, and
- (4) 20 and 60 degree gloss is greater than 160 SGU.
Dependencies are inferred from the claim text.