Biaxially stretched film and production method thereof

Details Biaxially stretched film and production method thereof Biaxially stretched film and production method thereof

2005-11-08

2005-11-08

Woodward, Ana (Department: 1711)

Stock material or miscellaneous articles

Structurally defined web or sheet

Physical dimension specified

C428S307300, C428S339000, C428S475500

Reexamination Certificate

active

06962743

ABSTRACT:
The biaxially stretched film of the present invention comprises a polyamide resin composition (C) obtained by melt-kneading a smectite (B) with a polyamide (A) produced by the polycondensation of a diamine component containing 70 mol % or higher of m-xylylenediamine and a dicarboxylic acid component containing 70 mol % or higher of a C4-C20α,ω-linear aliphatic dicarboxylic acid, or comprises at least one layer made of the polyamide resin composition (C). The polyamide resin composition (C) comprises the polyamide (A) in an amount of 80 to 99.9 parts by weight and the smectite (B) in an amount of 0.1 to 10 parts by weight. The layer made of the polyamide resin composition (C) has a relative peak intensity ratio of 60 or less. The relative peak intensity ratio is represented by the formula: B/A×100, wherein A and B are intensities of the strongest peak and the next stronger peak appearing in a diffraction angle 2θ ranging from 15° to 25° of a CuKα X-ray diffraction pattern of the layer made of the polyamide resin composition (C), provided that A is the peak intensity of the peak at a lower angle and B is the peak intensity of the peak at a higher angle.

REFERENCES:
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Giannelis, “Polymer Layered Silicate Nanocomposites”, Ad. Mater., Jan. 1996, vol. 8, No. 1, pp. 29-35.

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