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    • 2. 发明授权
    • Meta-xylylene diamine/aliphatic dicarboxylic acid polyamide film
    • 亚甲基二胺/脂族二羧酸聚酰胺薄膜
    • US4133802A
    • 1979-01-09
    • US760848
    • 1977-01-21
    • Makoto HachiboshiKoichi MatsunamiHikoichi NaganoHiroshi IekiTsutomu Oko
    • Makoto HachiboshiKoichi MatsunamiHikoichi NaganoHiroshi IekiTsutomu Oko
    • C08G69/46
    • C08G69/46
    • A drawn film of polyamide having an oxygen permeability coefficient of not more than 5 .times. 10.sup.-13 ml.cm/cm.sup.2.sec.cmHg, a breaking strength of not less than 14 kg/mm.sup.2, a breaking elongation of 30 to 150%, a yield strength of not less than 7 kg/mm.sup.2 and a yield elongation of 2 to 6%, which can be manufactured by drawing an undrawn polyamide film biaxially at a temperature within a certain range and optionally heat treating the resulting drawn film, the said undrawn polyamide film being made of a polyamide having a relative viscosity of about 2.0 to 4.0 when measured with a solution thereof in 96% sulfuric acid at a concentration of 1 g/100 ml at 25.degree. C and containing in the molecule not less than 70% (mol) of the repeating unit constituted with metaxylylenediamine or its mixture with paraxylylenediamine and an .alpha.,.omega.-aliphatic dicarboxylic acid having 6 to 10 carbon atoms, which is useful as a packaging material due to its excellent properties in tensile strength, yield strength, Young's modulus, heat stability, size stability, transparency, gas barrier property, etc.
    • 氧透过系数不大于5×10-13毫升/厘米2·sec·cmHg,断裂强度为14kg / mm2以上,断裂伸长率为30〜150%的聚酰胺的拉伸膜, 屈服强度不小于7kg / mm2,屈服伸长率为2至6%,其可以通过在一定范围内的温度下双轴拉伸未拉伸的聚酰胺膜并任选地热处理所得拉伸膜来制造,所述 未拉伸聚酰胺薄膜由相对粘度为约2.0〜4.0的聚酰胺制成,当用其溶液在96%硫酸中,浓度为1g / 100ml,25℃,分子量不低于70 由间苯二甲胺或其与对二甲苯二胺的混合物构成的重复单元的%(mol)和具有6至10个碳原子的α,ω-脂肪族二羧酸,由于其优异的拉伸强度,屈服强度, ,哟 单元模量,热稳定性,尺寸稳定性,透明性,阻气性等。