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Biaxially orientated polyamide-based resin film and its manufacturing method

A polyamide-based, biaxially oriented technology, applied in the field of polyamide-based biaxially oriented films and their manufacturing, can solve the problems of poor processability, poor adhesion and wettability, and reduced yield, etc. The effect of high transparency, excellent smoothness, and good operability

Inactive Publication Date: 2007-08-22
TOYOBO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the above-mentioned method (1), there is a disadvantage that in order to ensure sufficient operability even under high humidity, the addition amount of microparticles has to be increased, and thus, when the addition amount of microparticles is increased, the transparency of the film decreases.
On the other hand, in the method (2) above, there is a disadvantage that when the amount of the organic lubricant added is increased in order to obtain sufficient slipperiness, the adhesiveness and wettability at the time of lamination with other film materials deteriorate. Poor, poor processability such as printing and evaporation
[0007] However, in a high-humidity environment, biaxially-oriented polyamide-based resin films sometimes have anisotropy in elongation due to moisture absorption, and the biaxially-oriented polyamide-based resin films that produce such anisotropy are supplied to the production line in a high-humidity environment. During bag processing and printing processing, the following problems occur: the biaxially oriented polyamide resin film curls up, resulting in deterioration of the bag making process efficiency, and at the same time, lowering the yield
[0012] However, in the above-mentioned method of Patent Document 2, even when the slope difference in the boiling water shrinkage ratio of the biaxially oriented polyamide resin film at the end of the film immediately after film formation is suppressed, the biaxially oriented When the polyamide resin film is supplied to the bag-making process and printing process in a high-humidity environment, the biaxially oriented polyamide-based resin film may also curl. Therefore, it is necessary to further improve the efficiency of the bag-making process.

Method used

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  • Biaxially orientated polyamide-based resin film and its manufacturing method

Examples

Experimental program
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Embodiment 1

[0075] A 100-liter batch type polymerization tank was used, and nylon 6 obtained by ring-opening polymerization of ε-caprolactate was used as a polyamide-based resin. The nylon 6 chips were extracted with hot water using a batch polymerization tank to reduce the content of monomers and oligomers to 1% by weight, then dried to a moisture content of 0.1% by weight, and put into use. The relative viscosity of the raw nylon 6 and the stretched film is about 2.8 as measured at 20°C using a 96% concentrated sulfuric acid solution. In addition, the microparticles (0.45% by weight) used to form the surface protrusions are silica microparticles (Syrisia 350 manufactured by Fuji Silysia Chemical Co., Ltd.) with a pore volume of 1.6 cc / g and an average particle diameter of 1.8 μm. In the aqueous solution of ε-caprolactam, disperse with a high-speed mixer, add it to the polymerization tank, and disperse it into nylon 6 during the polymerization process. After further compounding 0.15% by...

Embodiment 2～4

[0078] Except having changed stretching conditions as shown in Table 1, it carried out similarly to Example 1, and obtained the biaxially-oriented polyamide-type resin film of Examples 2-4. Table 2 shows the evaluation results of properties of the obtained biaxially oriented polyamide resin film.

Embodiment 5～7

[0084] The micropore volume and the addition concentration of the microparticles for forming surface protrusions used in Example 1 were changed as shown in Table 1, respectively, and the rest was performed in the same manner as in Example 1 to obtain Comparative Examples 3 to 5. Biaxially oriented polyamide resin film. Table 2 shows the evaluation results of properties of the obtained biaxially oriented polyamide resin film.

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Abstract

Provision of a biaxially oriented polyamide resin film superior in transparency and slipperiness under high humidity, which is free of curling during boil processing and misalignment due to moisture absorption. The biaxially oriented polyamide resin film of the present invention is formed by drawing in two steps, in the longitudinal direction, a non-oriented sheet made from a polyamide resin containing fine particles for forming a surface protrusion, and drawing the film in the transverse direction by a sequential biaxial drawing method, and shows a misalignment due to moisture absorption of 2.0 - 4.0 mm and a boil distortion of 2 - 3%.

Description

technical field [0001] The present invention relates to a polyamide-based biaxially oriented film and a method for producing the same. The polyamide-based biaxially oriented film is laminated with an olefin resin film such as polyethylene or polypropylene, and can be used for packaging retort foods, etc. Strong toughness and excellent pin hole resistance; in particular, a polyamide-based biaxially oriented film with excellent operability in a high-humidity environment, and a polyamide-based biaxially oriented film having both transparency and slipperiness. Axially oriented film and its manufacturing method. Background technique [0002] In general, biaxially oriented polyamide-based stretched films are widely used as packaging materials for various foods, etc. due to their excellent mechanical and thermal properties and high gas barrier properties. The amide-based biaxially oriented film has a problem that it softens due to moisture absorption in a high-humidity environment...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C55/14C08J5/18B29K77/00C08L77/00
CPCC08J5/18B29C55/143C08J2377/00B29C55/065B29K2105/16B29K2077/00B29C55/14
Inventor 西忠嗣宫口义纪小田尚伸
Owner TOYOBO CO LTD
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