Production method of polyester film having furandicarboxylic acid unit

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

Active Publication Date: 2022-05-27
TOYOBO CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Production method of polyester film having furandicarboxylic acid unit
  • Production method of polyester film having furandicarboxylic acid unit
  • Production method of polyester film having furandicarboxylic acid unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0171] As a raw material, 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 were used. 7 Ω·cm Polyethylene 2,5-furandicarboxylate manufactured by Avantium Corporation. After drying under reduced pressure (1 Torr) at 100° C. for 24 hours to make the moisture content 100 ppm or less, it was supplied to a twin-screw extruder (screw diameter 30 mm, L / D=25). Regarding the raw material supplied to the twin-screw extruder, the resin temperature from the melting section of the extruder to the kneading section, the polymer piping (the pipe for the melted raw material), and the gear pump was set to 270°C, and thereafter The polymer piping (pipe for the melted raw material) was set at 275°C, and it was melt-extruded into a sheet form from a T die (pipe). The temperature of the extruded molten resin sheet was 275°C.

[0172] Then, the extruded resin was cast on a cooling drum having a surface temperat...

Embodiment 2

[0176] A film was obtained by the same method as described in Example 1 except that the thickness of the unstretched film was 300 μm. The physical properties of the obtained film are shown in Table 1.

Embodiment 3～6

[0178] 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. The physical properties of the obtained film are shown in Table 1.

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Abstract

The present invention provides a method for producing a biaxially oriented polyester film that can be used in industrial applications and packaging applications. A method for producing a biaxially oriented polyester film, characterized in that it comprises the steps of: feeding a polyester resin into an extruder; extruding the melted polyester resin from the extruder to obtain 250- A step of melting the resin sheet at 310°C; a step of bringing the molten resin sheet into close contact with a cooling roll by an electrostatic application method to obtain an unstretched sheet; and a step of biaxially stretching the above-mentioned unstretched sheet, and the above-mentioned polyester The resin satisfies the following (A) to (C): (A) the above-mentioned polyester resin contains polyethylene furandicarboxylate resin formed by furandicarboxylic acid and ethylene glycol; (B) the intrinsic viscosity of the above-mentioned polyester resin It is more than 0.50dL / g; (C) the melting resistivity value at 250°C of the above-mentioned polyester resin is 3.0×10 7 Ω·cm or less.

Description

technical field [0001] The present invention relates to a method for producing a biaxially oriented polyester film having a furandicarboxylic acid unit. 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 film, electronic technology, energy, packaging materials, automobiles and other very wide fields. Among plastic films, biaxially stretched PET films are widely used in industrial fields and packaging fields because of 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 (FPD) such as liquid crystal displays and plasma displays. Moreover, the PET f...

Claims

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Application Information

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Patent Type & Authority Patents(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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