Method for producing polyester film having furandicarboxylic acid unit

A manufacturing method and technology of polyester film, applied in chemical instruments and methods, household appliances, packaged food, etc., to achieve the effect of excellent mechanical properties

Active Publication Date: 2019-10-25
TOYOBO CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] In Patent Document 7, only the biaxially stretched polyester film containing furandicarboxylic acid and the improvement of the properties of the film having heat sealability have been studied.

Method used

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  • Method for producing polyester film having furandicarboxylic acid unit
  • Method for producing polyester film having furandicarboxylic acid unit
  • Method for producing polyester film having furandicarboxylic acid unit

Examples

Experimental program
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Effect test

Embodiment 1

[0170] As a raw material, use an intrinsic viscosity of 0.90 dL / g, a melting point of 215°C, and a melting resistivity value of 1.1×10 when heated and melted at 275°C. 7 Polyethylene-2,5-furandicarboxylate manufactured by Avantium Corporation in Ω·cm. After drying under reduced pressure (1 Torr) at 100° C. for 24 hours so that the moisture content was 100 ppm or less, it was supplied to a twin-screw extruder (30 mm in screw diameter, L / D=25). For the raw material supplied to the twin-screw extruder, the temperature of the resin from the melting section to the kneading section of the extruder, the polymer piping (pipe for the molten raw material), and the gear pump was set at 270° C. The polymer pipe (pipe for molten raw material) was set at 275° C., and melted and extruded into a sheet form from a T die (pipe head). The temperature of the extruded molten resin sheet was 275°C.

[0171] Then, the extruded resin was cast on a cooling drum with a surface temperature of 20° C., ...

Embodiment 2

[0175] A film was obtained by the same method as described in Example 1 except that the thickness of the unstretched film was 300 μm. Table 1 shows the physical properties of the obtained film.

Embodiment 3～6

[0177] A film was obtained by the same method as described in Example 1 except that the film forming conditions were changed as shown in Table 1. Table 1 shows the physical properties of the obtained film.

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Abstract

Provided is a method for producing a biaxially oriented polyester film that can be used for industrial applications and packaging applications. The method for producing a biaxially oriented polyesterfilm includes: a step in which a polyester resin is introduced into an extruder; a step in which the melted polyester resin is extruded from the extruder and a melted resin sheet having a temperatureof 250-310 DEG C is obtained; a step in which the melted resin sheet is brought into close contact with a cooling roller by applying an electrostatic charge and an unstretched sheet is obtained; and astep in which the unstretched sheet is biaxially stretched. The method for producing a biaxially oriented polyester film is characterized in that the polyester resin satisfies the conditions (A) to (C) indicated below. (A) The polyester resin contains a polyethylene furandicarboxylate resin comprising furandicarboxylic acid and ethylene glycol. (B) The intrinsic viscosity of the polyester resin is 0.50 dL / g or more. (C) The melt resistivity of the polyester resin at 250 DEG C is 3.0*107 Omega.cm or less.

Description

technical field [0001] The present invention relates to a method for producing a biaxially oriented polyester film having furandicarboxylic acid units. Background technique [0002] Polyester resins such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT), which are thermoplastic resins excellent in heat resistance and mechanical properties, have been used in Plastic films, electronics, energy, packaging materials, automobiles, and a very wide range of fields. Among plastic films, biaxially stretched PET films are widely used in industrial and packaging fields due to their excellent balance of mechanical properties, strength, heat resistance, dimensional stability, chemical resistance, optical properties, etc., and cost. . [0003] In the field of industrial films, since it has excellent transparency, it can be used as a functional film for flat panel displays (FPDs) such as liquid crystal displays and plasma displays. Moreover, the PET film to which ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B29C48/305B29C48/88B29C55/12B32B27/36B29C48/08B29C48/885
CPCB29C55/12C08J5/18B29C48/08B29C48/885C08J2367/02B29C48/0018B29C48/022B29K2067/003B29K2067/006B32B2255/10B32B27/16B32B2250/02B32B2307/308B32B27/18B32B2307/518B32B2255/20B32B2307/732B32B2439/70B32B2307/726B32B2255/205B32B27/36B32B27/10B32B2307/7244B32B2250/03B32B2250/244B32B2307/306B32B27/08B29C48/305B29C48/88C08L67/02C08G63/672B29C2948/92152B29K2067/00B29K2995/0053B29C71/02B29C71/0063B29C71/0072B29C2071/022
Inventor 早川章太沼田幸裕伊藤胜也稻垣润清水敏之形舞祥一森重地加男杰斯珀·加布里埃尔·范伯克尔
Owner TOYOBO CO LTD
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