Abstract: Provided is a heat-shrinkable polyester film that suppresses deterioration of the shrinkage finish property associated with a decline in performance during aging and does not loosen even after being used as a label. This heat-shrinkable polyester film comprising a polyester of a predetermined composition fulfills all of the following: (1) a ratio A1/A2 of the absorbancy (A1) at 1340 cm?1 and the absorbancy (A2) at 1410 cm?1 of the film measured by polarized ATR-FTIR from 0.45 to 0.75 or from 0.40 to less than 0.45 in either the width direction or longitudinal direction of the film; (2) a ratio (shrinkage stress after 30 seconds/maximum shrinkage stress) of the shrinkage stress after 30 seconds when the film is heat shrunk for 30 seconds in 90° C. hot air (shrinkage stress after 30 seconds) and the maximum shrinkage stress of from 75% to 100%; and (3) a hot-water shrinkage in the width direction of from 30% to 55% when, after aging the film for 672 hours in a 30° C.

Abstract: There is provided a thermally shrinkable polyester film where the opening ability along the perforation is very good. A thermally shrinkable polyester film comprising polyester resin in which ethylene terephthalate is a main constituting component and not less than 13 molar % of one or more monomer component(s) which can become non-crystalline component is/are contained in the total polyester resin components, wherein the film has specific thermally shrinking characteristics and specific mechanical characteristics after thermal shrinking treatment.

Abstract: Provided is a heat-shrinkable polyester film that suppresses deterioration of the shrinkage finish property associated with a decline in performance during aging and does not loosen even after being used as a label. This heat-shrinkable polyester film comprising a polyester of a predetermined composition fulfills all of the following: (1) a ratio A1/A2 of the absorbancy (A1) at 1340 cm?1 and the absorbancy (A2) at 1.410 cm?1 of the film measured by polarized ATR-FTIR from 0.45 to 0.75 or from 0.40 to less than 0.45 in either the width direction or longitudinal direction of the film; (2) a ratio (shrinkage stress after 30 seconds/maximum shrinkage stress) of the shrinkage stress after 30 seconds when the film is heat shrunk for 30 seconds in 90° C. hot air (shrinkage stress after 30 seconds) and the maximum shrinkage stress of from 75% to 100%; and (3) a hot-water shrinkage in the width direction of from 30% to 55% when, after aging the film for 672 hours in a 30° C.

Abstract: The invention provides a heat-shrinkable polyester-based film containing ethylene terephthalate as a main constituent component and 0-5 mol % of a monomer component that can be an amorphous component based on all of the polyester resin components. The inventive film has a main shrinkage direction in the longitudinal direction, with heat shrinkage properties in the longitudinal direction and the width direction and a refractive index within specified ranges.

Abstract: Disclosed is a heat-shrinkable polyester film which, even when stored in an outside warehouse which is not temperature-controlled during a hot summer, does not result in the film shrinking (so-called natural shrinkage); which further has a low decrease in shrinkage rate in the main shrinkage direction, and which can be attached aesthetically and efficiently without changing the temperature conditions for causing heat shrinkage when attaching as a label by heat-shrinking the same to a container (e.g., a plastic bottle). The disclosed heat-shrinkable polyester film comprises a polyester resin having ethylene terephthalate as a main component and containing at least 7 mol % of at least one monomer capable of forming an amorphous component in the whole component of polyester resin. In the heat-shrinkable polyester film, the 80° C.-120° C.

Abstract: The invention provides a heat-shrinkable polyester-based film containing ethylene terephthalate as a main constituent component and 0-5 mol % of a monomer component that can be an amorphous component based on all of the polyester resin components. The inventive film has a main shrinkage direction in the longitudinal direction, with heat shrinkage properties in the longitudinal direction and the width direction and a refractive index within specified ranges.

Abstract: Provided is a heat-shrinkable polyester-based film having: a slow shrinkage speed; a shrinkage rate that increases gently with the increase of temperature; a large shrinkage stress; and an excellent shrinkage finish. This heat-shrinkable polyester-based film is characterized in that: the ratio (A1/A2) between the absorbancy (A1) at 1340 cm?1 of the heat-shrinkable polyester-based film measured by the polarized ATR-FTIR method and the absorbancy (A2) at 1410 cm?1 is from 0.65 to 0.9 in the main shrinkage direction of the film and from 0.45 to 0.75 in the direction orthogonal to the main shrinkage direction; and the warm-water heat shrinkage rate for when the film is immersed in 90-degree warm water for 10 seconds is from 40% to 60% in the main shrinkage direction of the film and from 0% to 12% in the direction orthogonal to the main shrinkage direction.

Abstract: Disclosed is a void-containing heat-shrinkable polyester film which is composed of at least two layers, wherein at least one of the layers is a polyester resin layer comprising a cyclic polyolefin resin and containing voids. The film has an apparent specific gravity of less than 1.00 and has specified heat shrinking properties and mechanical properties. Also disclosed is a void-containing heat-shrinkable polyester film as mentioned above, which exhibits specified cuttability along a perforation. Further disclosed is a process for producing a void-containing heat-shrinkable polyester film as mentioned above.

Abstract: Provided is a heat-shrinkable polyester-based film having: a slow shrinkage speed; a shrinkage rate that increases gently with the increase of temperature; a large shrinkage stress; and an excellent shrinkage finish. This heat-shrinkable polyester-based film is characterized in that: the ratio (A1/A2) between the absorbancy (A1) at 1340 cm?1 of the heat-shrinkable polyester-based film measured by the polarized ATR-FTIR method and the absorbancy (A2) at 1410 cm?1 is from 0.65 to 0.9 in the main shrinkage direction of the film and from 0.45 to 0.75 in the direction orthogonal to the main shrinkage direction; and the warm-water heat shrinkage rate for when the film is immersed in 90-degree warm water for 10 seconds is from 40% to 60% in the main shrinkage direction of the film and from 0% to 12% in the direction orthogonal to the main shrinkage direction.

Abstract: A heat-shrinkable white polyester film is provided which has extremely satisfactory cuttability along a perforation and has light-shielding properties. Also provided are: a label; and a process for producing the film with high productivity. The heat-shrinkable white polyester film comprises a polyester resin constituted of ethylene terephthalate as a main constituent component and containing at least 13 mol % one or more monomer ingredients capable of serving as an amorphous component among all components of the polyester resin. This film has specific heat shrinkability, specific light-shielding properties, and specific mechanical properties. The process is excellent in the productivity of the film. The label is obtained from the heat-shrinkable white polyester film.

Abstract: Disclosed is a heat shrinkable polyester film formed from a polyester resin that is mainly composed of ethylene terephthalate and contains 3-12% by mole (inclusive) of one or more monomer components, which can be amorphous components, relative to all the polyester resin components, in which the heat shrinkable polyester film has a main shrinkage direction which is the width direction. The heat shrinkable polyester film is characterized in that the shrinkage in 80° C. glycerin, the shrinkage in 130° C. glycerin and the tensile breaking strength in the longitudinal direction are controlled within specific ranges.

Abstract: The inventive heat-shrinkable polyolefin film is high in shrinkability in the longitudinal direction that is its main shrinkage direction and excellent in finish properties after shrinkage, perforated line openability, and thermal blocking resistance. The heat-shrinkable polyolefin film is characterized by particular values with respect to hot-water heat shrinkage ratio in the longitudinal and width directions, right angle tear strength in the width direction, and heat-resistant peel strength.

Abstract: Disclosed is a heat shrinkable polyester film which does not suffer (namely natural shrinkage), is suppressed in decrease of the shrinkage in the main shrinkage direction, and is able to be beautifully and efficiently fitted to a container or the like without changing the temperature conditions for heat shrinkage when the heat shrinkable polyester film is fitted, as a label, to the container or the like by means of heat shrinkage even after high-temperature summer storage in an out door warehouse which has no temperature control system. Specifically disclosed is a heat shrinkable polyester film which is formed from a polyester resin that is mainly composed of ethylene terephthalate and contains 3-12% by mole (inclusive) of one or more monomer components, which can be amorphous components, relative to all the polyester resin components. The heat shrinkable polyester film is characterized in that the shrinkage in 80° C. glycerin, the shrinkage in 130° C.

Abstract: Disclosed is a heat-shrinkable polyester film which, even when stored in an outside warehouse which is not temperature-controlled during a hot summer, does not result in the film shrinking (so-called natural shrinkage); which further has a low decrease in shrinkage rate in the main shrinkage direction, and which can be attached aesthetically and efficiently without changing the temperature conditions for causing heat shrinkage when attaching as a label by heat-shrinking the same to a container (e.g., a plastic bottle). The disclosed heat-shrinkable polyester film comprises a polyester resin having ethylene terephthalate as a main component and containing at least 7 mol % of at least one monomer capable of forming an amorphous component in the whole component of polyester resin. In the heat-shrinkable polyester film, the 80° C.-120° C.

Abstract: The inventive heat-shrinkable polystyrene film is high in shrinkability in the longitudinal direction that is its main shrinkage direction, is excellent in perforated line openability, and has high toughness. The heat-shrinkable polystyrene film is characterized by particular values with respect to hot-water heat shrinkage ratio in the longitudinal and width directions, right angle tear strength in the width direction, and breaking energies in the longitudinal and width directions.

Abstract: Disclosed is a void-containing heat-shrinkable polyester film which is composed of at least two layers, wherein at least one of the layers is a polyester resin layer comprising a cyclic polyolefin resin and containing voids. The film has an apparent specific gravity of less than 1.00 and has specified heat shrinking properties and mechanical properties. Also disclosed is a void-containing heat-shrinkable polyester film as mentioned above, which exhibits specified cuttability along a perforation. Further disclosed is a process for producing a void-containing heat-shrinkable polyester film as mentioned above.

Abstract: There is provided a thermally shrinkable polyester film where the opening ability along the perforation is very good. A thermally shrinkable polyester film comprising polyester resin in which ethylene terephthalate is a main constituting component and not less than 13 molar % of one or more monomer component (s) which can become non-crystalline component is/are contained in the total polyester resin components, wherein the film has specific thermally shrinking characteristics and specific mechanical characteristics after thermal shrinking treatment.

Abstract: A heat-shrinkable white polyester film is provided which has extremely satisfactory cuttability along a perforation and has light-shielding properties. Also provided are: a label; and a process for producing the film with high productivity. The heat-shrinkable white polyester film comprises a polyester resin constituted of ethylene terephthalate as a main constituent component and containing at least 13 mol % one or more monomer ingredients capable of serving as an amorphous component among all components of the polyester resin. This film has specific heat shrinkability, specific light-shielding properties, and specific mechanical properties. The process is excellent in the productivity of the film. The label is obtained from the heat-shrinkable white polyester film.

Abstract: The inventive heat-shrinkable polystyrene film is high in shrinkability in the longitudinal direction that is its main shrinkage direction, is excellent in perforated line openability, and has high toughness. The heat-shrinkable polystyrene film is characterized by particular values with respect to hot-water heat shrinkage ratio in the longitudinal and width directions, right angle tear strength in the width direction, and breaking energies in the longitudinal and width directions.

Abstract: The inventive heat-shrinkable polyolefin film is high in shrinkability in the longitudinal direction that is its main shrinkage direction and excellent in finish properties after shrinkage, perforated line openability, and thermal blocking resistance. The heat-shrinkable polyolefin film is characterized by particular values with respect to hot-water heat shrinkage ratio in the longitudinal and width directions, right angle tear strength in the width direction, and heat-resistant peel strength.