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

Claim 1:
2. The roll of the white heat-shrinkable polyester-based film according to claim 1, wherein
the total light transmittance of the film is 40% or less;
the difference in percentage points between the maximum and minimum total light transmittance among samples is 3 or less, 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 total light transmittance among samples is 3 or less, 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.