摘要:
A heat-shrinkable polyester film is obtained which is extremely satisfactory in openability along a perforation, has exceedingly high productivity, and is less apt to split in the lengthwise direction in processing, e.g., printing. Provided is a label which is formed from the heat-shrinkable film and is satisfactorily tearable. The label is one formed from a tubular material which comprises as a base a heat-shrinkable film thermally shrinking mainly in the film width direction and which has been cut according to an object to be packaged, both edges in the film width direction having been bonded to each other. The tubular material has been thermally shrunk to constitute the label, with which at least part of the periphery of the object to be packaged is covered. The label has an angle tear strength in the direction perpendicular to the main shrinkage direction (i.e., in the film length direction) of 100-310 N/mm and a tensile break strength in the direction perpendicular to the main shrinkage direction (i.e., in the film length direction) of 50-300 MPa.
摘要:
The heat-shrinkable polyester film rolls according to the present invention is characterized in that the film rolls have (1) a heat shrinkage percentage at 85 DEG C in the maximum shrinkage direction of 20% or more; (2) a melt resistivity at a temperature of 275 DEG C of 0.70 X 10 OMEGA .cm or less; (3) when samples thereof are cut off at an interval of about 100 m and the fluctuation in thickness in the maximum shrinkage direction is measured, a thickness distribution width represented by the following formula of respective samples of 7% or less. Thickness distribution width = (Maximum thickness - Minimum thickness) / Average thickness X 100 Container-wrapping films excellent in processability and printability can be produced from the heat-shrinkable polyester film rolls in high yield.
摘要:
A film roll of a heat-shrinkable polyester film characterized in that the heat-shrinkable polyester film meets the following requirements (1) and (2). (1) When samples are cut off therefrom at an almost equal interval along the longitudinal direction, and immersed in hot water at 85 DEG C for 10 seconds, subsequently in water at 25 DEG C and withdrawn, heat-shrinkage percentages in the maximum shrinkage direction of all the samples are 20% or more. (2) When raw polymers used for production of the film above comprises of a major constitutional unit and one or more sub constitutional units different therefrom; and the content of the primary sub constitutional unit is determined, the content of the primary sub constitutional unit in each sample is more than 7 mole % in 100% of all constitutional units, and when an average of the contents of the primary sub constitutional unit is calculated, the contents thereof of all the samples fall within a range of +/-2 mole % relative to the average.
摘要:
[PROBLEMS] To provide a biaxially oriented polyamide resin laminate film roll that permits performing of smooth bag-making processing by laminating with high yield, enabling efficiently obtaining of a packaged matter free from S-shaped curling. [MEANS FOR SOLVING PROBLEMS] There is provided a polyamide resin laminate film roll wherein in the event of disposing of a first specimen cutout portion within 2 m from film winding end and disposing of a final specimen cutout portion within 2 m from film winding startand further in the event of disposing specimen cutout portions every about 100 meters from the first specimen cutout portion, with respect to all the specimens cut out from the cutout portions, properties, such as boiling water shrinkage factor, surface roughness and refractive index along thickness direction, are regulated so as to fall within a fluctuation band of given range.
摘要:
A film roll comprising a heat-shrinkable polystyrene based resin film wound into a roll, characterized in that, each of the samples taken out from the roll exhibits, in a heat shrinkage test under the condition of the immersion in a hot water at 85 ° C for 10 sec, a heat shrinkage rate in the main shrinking direction of within ± 5 % relative to an average rate of the total samples; a heat-shrinkable polystyrene based resin film taken from the roll; a heat-shrinkable label comprising the film; a method for producing the heat-shrinkable polystyrene based resin film roll which comprises using raw material chips having a specific form, or using a hopper having a specific shape for feeding raw material chips to an extruder, or limiting the variation of the surface temperature of a film in a specific production step to a specific range.