KR950008582A - Label shrink film and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a shrink film for a label and a method for manufacturing the same, wherein the polyester obtained from the dicarboxylic acid component and the diol component is dried at or below the secondary transition temperature (Tg), and then extruded and quenched through an extruder to form an amorphous sheet. After the preparation, the temperature (T _pre ) of the preheating section is in the range between Ts + 5 ° C. and Ts + 30 ° C. (Ts is the temperature of the stretching section of Tg-5 ° C. or more and 95 ° C. or less). A method of producing a shrinkage film for labels, which is stretched in the transverse direction and heat treated at a temperature not higher than 10 ° C. higher than the final stretching temperature for 30 seconds or less, and 1.50 ≦ I _MSD / I _TD ≦ 2.10 and O ≦ MOR— (I _MSD / I _TD ) ≤ 5 × 10 ^-2 provides a shrink film for a label, characterized in that it satisfies (wherein I _MSD : transmission microwave intensity with respect to the Main Shrinkable Direction, I _TD : Permeation for MSD and Transverse Direction Microwave intensity, MOR: index indicating anisotropy (corresponding to the maximum value of the transmitted microwave intensity divided by the minimum value)

Description

Label shrink film and its manufacturing method

Since this is an open matter, no full text was included.

Claims (7)

The polyester obtained from the dicarboxylic acid component and the diol component was dried at or below the secondary transition temperature (Tg), and then extruded and quenched through an extruder to prepare an amorphous sheet, and then the temperature (Tpre) of the preheating section was Ts +. Stretch in the longitudinal and transverse directions within the range of 5 ° C to Ts + 30 ° C (Ts is the temperature of the drawing section of Tg-5 ° C or more and 95 ° C or less), and at a temperature of 10 ° C or higher than the final drawing temperature. The manufacturing method of the shrinkage film for labels which heat-processes for 30 second or less. The polyester according to claim 1, wherein terephthalic acid is used as the main dicarboxylic acid component and ethylene glycol is used as the main diol component, and adipic acid, isophthalic acid, phthalic acid, and sebacic acid, 1,10 are used as copolymerization components. Use dicarboxylic acid selected from the group consisting of decane dicarboxylic acid, and use diol selected from the group consisting of diethylene glycol, neopentyl glycol, 1,4-cyclohexane dimethanol, polyalkylene Method for producing a shrink film for labels, characterized in that. The method of claim 1, wherein the polyester is a component constituting the copolyester, and the ratio of terephthalic acid units and ethylene units in the total polymer is 75 wt% or more and 90 wt% or less. . The shrink film for a label according to claim 1, wherein the amorphous sheet is stretched 1.0-1.5 times in the longitudinal direction between Ts + 5 ° C and Ts + 30 ° C, and is stretched 2.0-4.5 times in the width direction. Manufacturing method. The shrink film for a label according to claim 1, wherein the amorphous sheet is stretched 2.0-4.5 times in the longitudinal direction between Ts + 5 ° C and Ts + 30 ° C and stretched 1.0-1.5 times in the width direction. Manufacturing method. The method according to any one of claims 1, 4 or 5, wherein the amorphous sheet is uniaxially stretched, sequentially biaxially stretched or simultaneous biaxially stretched between Ts + 5 ° C and Ts + 30 ° C. The manufacturing method of the shrink film for labels characterized by the above-mentioned. Satisfying the relation of 1.50 ≦ I _MSD / I _TD ≦ 2.10 and O ≦ MOR- (I _MSD / I _TD ) ≦ 5 × 10 ⁻² , which is manufactured according to any one of claims 1 to 6 Shrink film for labels, characterized in that [I _MSD : transmission microwave intensity with respect to the Main Shrinkable Direction, I _TD : transmission microwave intensity with respect to the MSD and Transverse Direction, MOR: exhibits anisotropy Exponent (corresponding to the maximum value of the transmitted microwave intensity divided by the minimum value) ※ Note: The disclosure is based on the initial application.