Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From carboxylic acid or derivative thereof
Patent
1995-04-04
1997-08-05
Vargot, Mathieu D.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
From carboxylic acid or derivative thereof
528502B, 528503, B29L 700
Patent
active
056543948
ABSTRACT:
A thermoplastic resin film wherein the variation in thickness of the film in the longitudinal direction is not more than 5% and the ratio "Pw1/PwT" of the sum of spectral intensities of wave-number components present in the wave-number range of 0.15 to 0.45 (1/m) (Pw1) to the sum of spectral intensities of the full wave-number range (PwT) determined when a wave form of the variation in thickness is subjected to analysis of Fourier transformation is not more than 0.20, and wherein the variation in thickness of the film in the longitudinal direction is not more than 5% and the ratio "Pw2/PwT" of the sum of spectral intensities of wave-number components present in the wave-number range of 1.00 to 2.00 (1/m) (Pw2) to the sum of spectral intensities of the full wave-number range (PwT) is not more than 0.15. In such a film, the uniformity in thickness can remarkably improved, and snaking and wrinkles in post processing can be prevented.
REFERENCES:
patent: 3930167 (1975-12-01), Hsiao
patent: 4748329 (1988-05-01), Cielo et al.
patent: 5139727 (1992-08-01), Utsumi et al.
patent: 5268135 (1993-12-01), Sasaki et al.
Ieki Toshiya
Miyakawa Katsutoshi
Toyoda Katsuya
Tsunashima Kenji
Yamamoto Akiko
Miller Austin R.
Toray Industries Inc.
Vargot Mathieu D.
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