Toyo Boseki Kabushiki Kaisha

Atsuhiko Ohtsuka

Norimi Tabota

Hiroshi Nagano

Masatoshi Hashimoto

Seizo Takabayashi

A heat-shrinkable polyester film having a shrinkability in hot water (hereinafter referred to as a hot-water shrinkability) at 95&deg; C. for 10 seconds ranging from 30% to 50% in at least one direction (hereinafter referred to as direction (A)) and ranging from 25% to 45% in a direction (hereinafter referred to as direction (B)) perpendicular to said at least one direction, wherein a difference &Dgr;HS between the hot-water shrinkability in direction (A) and the hot-water shrinkability in direction (B) (ie., &Dgr;HS&equals;&verbar;hot-water shrinkability in direction (A)&mdash;hot-water shrinkability in direction (B)&verbar;) is 10% or smaller, is useful as a wrapping material, mainly as a covering material for the openings of vessels used for packing noodles, puddings, salads, and other foods.

Growing community of inventors

Tokyo, Japan

Atsuhiko Ohtsuka