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Biaxially oriented polyester film and preparation thereof

A biaxially oriented, polyester film technology, applied in the field of biaxially oriented polyester film and its preparation, can solve the problems of poor impact strength and pinhole resistance

Active Publication Date: 2007-07-25
爱思开迈克沃有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But these materials exhibit poor impact strength and pinhole resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] In the preparation examples of the present invention, an esterification reactor equipped with a stirrer that can operate at 200 rpm, a packed separation tower for separating 1,3-propanediol and water from the reaction effluent, and a packed separation tower equipped with an agitator capable of operating at 200 rpm are used. Separate reactor with counter-rotating agitator operating at 10-50 rpm, condenser for condensing the effluent, polymerization reactor with suction pump.

[0026] The properties of the polymer produced in the preparation examples were measured as follows.

[0027] (1) Intrinsic viscosity

[0028] According to the standard intrinsic viscosity measurement procedure, a sample of polyethylene terephthalate dissolved in o-chlorophenol was used to determine the intrinsic viscosity at a temperature of 30°C.

[0029] (2) Composition

[0030] Use JSM-LA300 type 1 H-NMR (Jeol Inc., Japan) performs NMR quantitative analysis on a polymer sample dissolved in a 4:1 mix...

preparation Embodiment 1

[0033] Put 100 mole parts of terephthalic acid and 130 mole parts of 1,3-propanediol into the esterification reactor together with the catalyst. The catalyst used was tributene titanate, and its amount was 0.07% by weight of terephthalic acid. Pressurize the reactor to about 1.3 kg / cm 2The temperature was increased to 260°C, and the esterification reaction was carried out at this temperature for about 4 hours. Then, 0.06% by weight of trimethyl phosphate (a kind of stabilizer) with respect to terephthalic acid and the esterification reactant were mixed. In addition, 0.07% by weight of silica powder (a slip agent) having an average particle diameter of 2.5 μm with respect to terephthalic acid was added thereto. The mixture was then stirred for 5 minutes and transferred to the polymerization reactor. The polymerization reactor was kept at 265°C and slowly evacuated. The polymerization reaction continued in it until the stirrer motor used up the measured amount of electric power. The...

preparation Embodiment 2

[0034] Preparation Example 2: Adipic acid copolymer (Polymer B)

[0035] As shown in Table 1, a total of 100 parts by mole of terephthalic acid (TPA) and adipic acid (AA), and 130 parts by mole of 1,3-propanediol were put into the esterification reactor together with the catalyst. The catalyst used was tributene titanate, and its amount was 0.07% by weight of terephthalic acid. Pressurize the reactor to about 1.2kg / cm 2 The temperature was increased to 260°C, and the esterification reaction was carried out at this temperature for about 4 hours. Then, 0.06% by weight of trimethyl phosphate (a kind of stabilizer) with respect to terephthalic acid and the esterification reactant were mixed. In addition, 0.07% by weight of silica powder (a slip agent) having an average particle diameter of 2.5 μm with respect to terephthalic acid was added. The mixture was then stirred for 5 minutes and transferred to the polymerization reactor. The polymerization reactor was kept at 265°C and slowly ...

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Abstract

A biaxially oriented polyester film of the present invention which comprises a polyester resin prepared by polymerizing a glycol component mainly comprising 1,3-propanediol and an acid component mainly comprising terephthalic acid or dimethyl terephthalate, said polyester film having an unit impact absorption energy of 1.0 or more, can be advantageously used for packaging.

Description

Technical field [0001] The invention relates to a biaxially oriented polyester film that can be used for packaging and a preparation method thereof. Background technique [0002] Packaging material composites used for food or other commodities require high impact strength. To this end, biaxially oriented nylon, polyethylene terephthalate, and polypropylene have been used. Biaxially oriented nylon films have good low-temperature impact strength and high pinhole resistance, but have the disadvantage that they absorb moisture (not satisfactory for long-term storage) and are hindered by poor printability due to uneven film thickness. On the other hand, the biaxially oriented polyethylene terephthalate film and the biaxially oriented polypropylene film have good printability, excellent heat resistance, and high dimensional stability. However, these materials exhibit poor impact strength and pinhole resistance. Summary of the invention [0003] Therefore, an object of the present inve...

Claims

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Application Information

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IPC IPC(8): C08J5/18
CPCC08J5/18C08L67/03C08G63/16C08G63/183B29C55/12C08J2367/03C08L2203/16B29C48/0018
Inventor 金南一金尚一金曔妍吴泰炳金容元
Owner 爱思开迈克沃有限公司
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