Patent ID: 11919216
Assignee: TOYOBO CO., LTD.
Field: Other special machines (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 2:
3. The roll of the white heat-shrinkable polyester-based film according to claim 1, wherein
the gloss of the film is 40% or more and 150% or less on both sides of the film, wherein the gloss is measured at 60 degrees angle;
the difference in percentage points between the maximum and minimum gloss among samples is 5 or less on both sides of the film, wherein the samples are taken from each part of the film divided into five in the film width direction; and
the difference in percentage points between the maximum and minimum gloss among samples is 5 or less on both sides of the film, wherein the samples are taken from the film every 100 m in the film longitudinal direction from the place forming surface layer of the roll of the white heat-shrinkable polyester-based film to the starting place of winding the film.