Abstract: A polyolefin-based film comprising at least one layer permitting printing as a result of laser irradiation; wherein not less than 100 ppm but not greater than 3000 ppm of pigment permitting printing as a result of laser irradiation is present in all layers of the film; haze thereof is not less than 1% but not greater than 30%; and unevenness in thickness thereof in either a machine direction or a transverse direction is not less than 0.1% but not greater than 25%. An object is to provide a film capable of being printed in distinct fashion by a laser, that excels with respect to unevenness in thickness, and that is of high transparency, and at the same time provide packaging which employs such film and on which printing has been directly carried out.

Abstract: The invention provides a heat-shrinkable polyester-based film roll obtained by winding a heat-shrinkable polyester-based film with a shrinkage ratio of 30% or more in a film main shrinkage direction in hot water at 90° C. for 10 seconds. The film roll has a winding length of 2000-25000 m and a width of 400-2500 mm. The film has a thickness of 5-40 ?m. In thickness unevenness in a width direction of the film on a surface layer of the film roll, there are positions having concave thickness patterns, and in a concave portion that has a maximum thickness difference (maximum concave portion), thickness unevenness in the maximum concave portion, which is obtained from the maximum thickness difference in the maximum concave portion and an average thickness of the film is 10% or less. The winding hardness of the surface layer of the film roll is 400-800.

Abstract: The invention provides a sealant film that is less likely to adsorb components formed of various types of organic compounds, has excellent heat sealing characteristics at 140° C., while having low heat sealing strength at 100° C. and being less likely for heat sealing layers to adhere to each other even when the film is used as a packaging bag and the content thereof is warmed in boiling water. The sealant film has at least one heat sealing layer consisting of a polyester component, wherein a heat sealing strength of the heat sealing layer being heat sealed to another heat sealing layer at 100° C. and 0.2 MPa for 2 seconds is 0-5 N/15 mm and at 140° C. and 0.2 MPa for 2 seconds is 8-30 N/15 mm, and a film density including all layers is 1.20 or more and less than 1.39.

Abstract: A polyester-based film comprising at least one layer permitting printing as a result of laser irradiation; wherein not less than 100 ppm but not greater than 3000 ppm of laser-printable metal is present in all layers of the film. The film is capable of being printed in distinct fashion by a laser, excels with respect to unevenness in thickness, and is of high transparency, while at the same time provide packaging which employs such film and on which printing has been directly carried out.

Abstract: [Problem] To provide: a biaxially oriented polyester film that exhibits excellent transparency, enables easy secondary processing such as coating and vapor deposition, provides excellent post-secondary-processing properties, and is environmentally friendly in that the film is made from polyester resins recycled from the market and society, including those from PET bottles; and a production method for such a film. [Solution] A biaxially oriented polyester film comprising a polyester resin composition containing particles and polyester resins recycled from the market and society, including those from PET bottles, the film having at least one surface that satisfies all requirements (1)-(3). (1) The number of fine projections having a height less than 3 nm per an area of 4×10-12m2 is 250-600. (2) The number of fine projections having a height not less than 3 nm per an area of 4×10-12m2 is 300-600. (3) The arithmetic average height Sa is 0.01-0.025 ?m.

Abstract: The present invention aims to provide a heat-shrinkable polyester film roll having decreased generation of wrinkles or longitudinal shrink mark. The present invention provides a film roll of a heat shrinkable polyester film, wherein a polyester of the polyester film contains recycled raw material from a PET bottle and an acid component of the polyester comprises isophthalic acid, and the film roll satisfies a specific average value of a shrinkage, specific isophthalic acid ratio, and specific thickness unevenness.

Abstract: The invention provides a heat-shrinkable polyester film roll containing a paper tube and a heat-shrinkable polyester film wound around the paper tube to form the heat-shrinkable polyester film roll, wherein (1) the film winding length is 2000-20000 m, (2) the film width is 400-2500 mm, (3) the film thickness is 5-30 ?m, (4) unevenness in thickness in the film widthwise direction in a film roll surface layer part is 12% or less, (5) the paper tube has an inner diameter of 3 inches, a difference in clearance of the paper tube in a widthwise direction after removal of the film from the film roll is 0.5 mm or less, and a flat compressive strength of the paper tube after removal of the film is 1700 N/100 mm or more, and (6) the average value of winding hardness in the widthwise direction in the film roll surface layer part is 500-850.

Abstract: A laminated body having at least two or more different layers, wherein the laminate body is characterized by satisfying the following requirements (1) to (5): (1) the laminate body has a heat-sealing layer as at least one of the outermost layers, wherein the heat-sealing layer includes a polyester based component containing ethylene terephthalate as a main constituent component, and a sealing strength of 8 N/15 mm to 30 N/15 mm; (2) at least one layer other than the heat-sealing layer is an inorganic thin film layer; (3) a water vapor permeation rate of 0.1 g/m2·d to 6 g/m2·d; (4) an oxygen permeation rate of 5 ml/m2·d·MPa to 30 ml/m2·d·MPa; and (5) a heat shrinkage rate of ?5% to 5%.

Abstract: [Problem] To provide a heat-shrinkable polyester film having excellent shrink finishing property due to the film's sufficient heat shrinkability and low shrinkage stress in the longitudinal direction, small change in the non-shrinkable direction of the film. [Solution] The heat-shrinkable polyester film which heat-shrinks in the longitudinal direction and satisfying the following (1) to (6); (1) having a shrinkage of 35% to 70% in the longitudinal direction; (2) having a shrinkage of ?8% to 7% in the width direction; (3) having a change rate of 5% to 22% when fixed in the longitudinal direction with fixed-length; (4) having a change rate of 5% to 20% in the width direction when fixed with 10% of slack in the longitudinal direction; (5) having a maximum shrinkage stress of 5 MPa to 15 MPa in the longitudinal direction; (6) having a stress at 10% elongation, F10, of 1 MPa to 5 MPa in the longitudinal direction and 0.5 MPa to 3 MPa in the width direction.

Abstract: A heat-shrinkable polyester film that has (1) a hot-water heat shrinkage of 40% or more in a main shrinkage direction of the film when immersed in hot water of 98° C. for 10 seconds; (2) a planar orientation coefficient of 0.035-0.070; (3) ethylene terephthalate as a main constituent component and 6-25 mol % diethylene glycol (DEG) constituent in 100 mol % of polyhydric alcohol in all the polyester resin constituting the film; (4) a maximum shrinkage stress of 2-17 MPa in the main shrinkage direction of the film when measured in hot air of 90° C.; and (5) a tensile elongation at break of 20% or more in a direction orthogonal to the main shrinkage direction after the film is aged in an atmosphere with an atmospheric temperature of 40° C. and a relative humidity of 85% for 28 days.

Abstract: The invention provides a heat-shrinkable polyester film roll obtained by winding a heat-shrinkable polyester film on a paper tube with primary shrinkage in the longitudinal direction and a shrinkage rate of 40% or more, wherein the film has a winding length of 1000 to 30000 m, a width of 50 to 1500 mm, and a thickness of 5-30 ?m, the thickness irregularity of the film roll in the width direction is 20% or less, the paper tube has an inner diameter of 3 inches with a 0.5 mm or less difference in clearance and a 1700 N/100 mm or more flat compressive strength in the width direction after the film is removed from the film roll, the mean value of the winding hardness of the surface layer part of the film roll in the width direction is 500-850, and the natural shrinkage rate in the longitudinal direction is 2.0% or less.

Abstract: Disclosed is a biaxially oriented polyester film that is superior in transparency and easy to perform secondary processing such as coating and vapor deposition, and satisfies performance after the secondary processing. The biaxially oriented polyester film consists of a polyester resin composition including particles, and at least one surface of the film satisfies all of the following requirements (1) to (3): (1) the number of micro protrusions having a height of less than 3 nm per an area of 4×10?12 m2 of 250 or more and 600 or less; (2) the number of micro protrusions having a height of 3 nm or more per an area of 4×10?12 m2 of 300 or more and 600 or less; and (3) an arithmetic average height Sa of 0.010 ?m or more and 0.025 ?m or less.

Abstract: To provide a biaxially-oriented polyester film roll that is excellent in transparency and heat resistance and has less defects. A biaxially oriented polyester film roll of the present invention characterized by satisfying requirements (1) a winding length of the film roll, (2) a width of the film roll, (3) an average hardness of an outermost surface layer of the polyester film roll, (4) a variation in hardness, (5) a thickness of a polyester film of the polyester film roll, and (6) an irregularity of thickness in the maximum concave portion.

Abstract: The invention provides a white polyester film formed with a polyester resin whose main constituent is ethylene terephthalate, and (1) the film has at least two or more layers, and has at least one white layer and at least one heat sealing layer, wherein at least one of the film surfaces is the heat sealing layer, and the film satisfies the prescribed requirements of (2) the peeling strength of the heat sealing layers, (3) the difference in reversing heat capacity between at a lower and a higher temperature than a glass transition temperature of the heat sealing layer, (4) the heat shrinkage in both a longitudinal and width direction when treated in hot water at 80° C. for 10 seconds, (5) the total light transmittance, and (6) the apparent specific gravity.

Abstract: Provided is a heat-shrinkable polyester film which has heat shrinkage properties in a main shrinkage direction in the longitudinal direction, a small variation in shrinkage in the width direction, and less likely generated wrinkles and strains at the time of shrinkage finishing. The polyester film is prepared from a polyester raw material resin comprising 50 mol % or more of an ethylene terephthalate unit in 100 mol % of constituent units of a polyester, diol components selected from aliphatic, alicyclic, and aromatic diols, and an amorphous monomer component that is 2% or more in 100 mol % of either a polyhydric alcohol component or a polybasic carboxylic acid component in the whole polyester resin, wherein the polyester does not contain polybasic carboxylic acids of tribasic or more, and the polyester film is obtained by uniaxial drawing in the longitudinal direction.

Abstract: To provide a biaxially oriented polyester film that has extremely low content of antimony, excellent hygiene, few foreign substances, excellent transparency and heat resistance, and is excellent in printability, workability, and productivity. A biaxially oriented polyester film characterized by a content of antimony in the film of 10 ppm or less, a content of phosphorus in the film of 25 ppm or more and 75 ppm or less, an intrinsic viscosity of the film of 0.51 dl/g or more and 0.70 dl/g or less, and a number of defects with a size of 1 mm or more is 1.0 or less per 1000 square meters of the film.

Abstract: The invention provides a polyester resin for heat-shrinkable film which contains terephthalic acid as a main component of a dicarboxylic acid component, contains ethylene glycol as a main component of a diol component, and contains from 18 to 32% by mole of neopentyl glycol and from 7 to 15% by mole of diethylene glycol when a total amount of the whole diol component in total polyester resin components is taken as 100% by mole. The polyester resin has (i) an intrinsic viscosity (IV) of not less than 0.65 and less than 0.70 dl/g, (ii) a carboxyl end group concentration (AV) of 8-25 eq/t, (iii) a color b value of 1.0-8.0 in an L*a*b* color system, and (iv) aluminum and phosphorus atoms, wherein the aluminum atoms are present in an amount of 15-40 ppm, and wherein the molar ratio of the phosphorus atoms to the aluminum atoms is 1.8-2.6.

Abstract: The present invention is to provide a method for producing a biaxially oriented polyester film that is superior in mechanical properties, transparency, and heat resistance, and at the same time, superior in secondary processing suitability and printing appearance. Disclosed is a biaxially oriented polyester film, having at least one surface satisfying the following requirements (1) and (2), and the film satisfying the following requirements (3) and (4). (1) A maximum peak height roughness (SRp) is 1.2 ?m to 1.6 ?m. (2) An arithmetic average roughness (SRa) is 0.024 ?m to 0.045 ?m. (3) A tensile strength in a longitudinal direction and a width direction is 180 MPa to 300 MPa. (4) A haze is 7% or less.

Abstract: The invention provides a heat-shrinkable polyester-based film roll obtained by winding a heat-shrinkable polyester-based film with a shrinkage ratio of 30% or more in a film main shrinkage direction in hot water at 90° C. for 10 seconds. The film roll has a winding length of 2000-25000 m and a width of 400-2500 mm. The film has a thickness of 5-40 ?m. In thickness unevenness in a width direction of the film on a surface layer of the film roll, there are positions having concave thickness patterns, and in a concave portion that has a maximum thickness difference (maximum concave portion), thickness unevenness in the maximum concave portion, which is obtained from the maximum thickness difference in the maximum concave portion and an average thickness of the film is 10% or less. The winding hardness of the surface layer of the film roll is 400-800.

Abstract: The invention provides an amorphous copolymerized polyester raw material for a film. The raw material contains ethylene terephthalate as a main constituent component, and contains from 18% by mol to 30% by mol of neopentyl glycol when a total amount of a glycol component in a total polyester resin component is taken as 100% by mol. The raw material contains from 8% by mol to 16% by mol of a constituent unit derived from diethylene glycol in the total amount (100% by mol) of the glycol component in the total polyester resin component. The raw material has an intrinsic viscosity of from 0.70 dl/g to 0.86 dl/g. The raw material has a melt viscosity of 200 Pa·S or less, when measured at a shear rate of 6080/S at 250° C.