摘要:
[PROBLEMS] To provide a heat-shrinkable polyester film which little causes printing omission in spite of its being produced by using a recycled material such as PET bottle and which satisfies the requirements of application of PET Bottle Recycling Recommendation Mark. [MEANS FOR SOLVING PROBLEMS] A heat-shrinkable polyester film produced either by laminating a substrate layer containing recycled PET bottle material with a layer free from recycled PET bottle material on at least one side and printing the layer free from recycled PET bottle material or by laminating a substrate layer containing 45 to 80 wt% of recycled PET bottle material with layers made mainly of a noncrystalline raw material on the both sides, in which when the film is dipped in water at 80˚C for 10 seconds and drawn up, the heat shrinkage in the main-shrinkage direction is 30% or above and the heat shrinkage in the direction perpendicular to the main-shrinkage direction is 10% or below and which is stretched at least uniaxially.
摘要:
A heat-shrinkable polyester film characterized in that (A) the degree of heat shrinkage in 70°C water is 10 to 50% as measured in the maximum shrinkage direction, (B) the degree of heat shrinkage in 85°C water is 70% or higher as measured in the maximum shrinkage direction and is 10% or lower as measured in the direction perpendicular to the maximum shrinkage direction, and (C) the difference in heat shrinkage Δ (%) shown by the following equation is 10 to 20%, provided that X0 (%) is the degree of heat shrinkage in 95°C water as measured in the maximum shrinkage direction and X10 (%) is the degree of heat shrinkage of a 10%-heat-shrunk film in 95°C water as measured in the maximum shrinkage direction. Δ = X0 - X1
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.