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    • 3. 发明授权
    • Process and apparatus for heat setting biaxially oriented tubular
polyethylene terephthalate films
    • 用于热定型双轴取向的管状聚对苯二甲酸乙二醇酯膜的方法和装置
    • US4061707A
    • 1977-12-06
    • US619818
    • 1975-10-06
    • Ryota NohtomiMasayoshi SugiyamaTuyoshi Shigeyoshi
    • Ryota NohtomiMasayoshi SugiyamaTuyoshi Shigeyoshi
    • B29C71/00B29C55/00B29C55/28B29C61/00B29C71/02B29D7/01B29C25/00
    • B29C71/02B29C55/28Y10S264/902
    • A process for continuously heat setting a tubular film of biaxially oriented polyethylene terephthalate in a state expanded with a gaseous material and taking the heat set film up on a winder which comprises carrying out the heat setting in a heat setting chamber wherein the temperature is controlled so as to be initially in the range of about 220.degree. C.-240.degree. C. in the first zone of heat setting and thereafter declines to about 195.degree. C.-215.degree. C. in the final zone while the length of the film is increased about 2% - 7% and the diameter of the film is reduced about 5 - 15% from the corresponding dimensions of the film before heat setting, the film then being taken up by a rotary winder. An apparatus for carrying out the described process is also provided which comprises a heating chamber having heating means dividing the chamber into zones so as to supply a hot blast in each zone of a different temperature from the other zones and rotatable means for controlling the stretch and shrinkage of the tubular film in the heating chamber and handling the film after it leaves the chamber comprising adjustable pinch rolls, film collapsing means and a winder, all mounted in fixed relation to one another.
    • 将以双轴取向的聚对苯二甲酸乙二醇酯的管状膜以气态材料膨胀的状态进行连续热定形的方法,并将该热定型膜向上卷绕在卷绕机上,该卷取机包括在热定型室中进行热定形,其中温度被控制为 最初在热定形的第一区域中在约220℃-240℃的范围内,然后在最终区域中降至约195℃-215℃,而膜的长度为 增加约2%-7%,并且膜的直径在热定形之前从膜的相应尺寸减小约5-15%,然后膜被旋转络纱机吸收。 还提供了一种用于执行所述方法的装置,其包括具有加热装置的加热室,所述加热装置将所述室分成区域,以便在与其它区域不同温度的每个区域中提供热风,以及用于控制拉伸和 加热室中的管状膜的收缩和在离开室之后处理膜包括可调节的夹送辊,膜折叠装置和卷绕机,它们都以彼此固定的关系安装。
    • 8. 发明授权
    • Process for preparing biaxially drawn polyamide films
    • 制备双轴拉伸聚酰胺薄膜的方法
    • US4698195A
    • 1987-10-06
    • US766632
    • 1985-08-16
    • Tsuguo OkumuraNaomichi YamagishiKazuharu AbeMasayoshi SugiyamaKenji Mori
    • Tsuguo OkumuraNaomichi YamagishiKazuharu AbeMasayoshi SugiyamaKenji Mori
    • B29C35/02B29C55/14B29K77/00B29L7/00C08J5/18
    • C08J5/18B29C55/143B29C2037/90B29C35/02B29K2077/00C08J2377/00
    • Biaxially drawn polyamide films having an excellent levelness are prepared as follows. A substantially unoriented polyamide film is heated at 45.degree.-65.degree. C., and then drawn in the longitudinal direction at a deformation rate of at least 10,000%/min. and a draw ratio of 2.7-3.5 by a roll stretcher. The drawn film is immediately transferred to the lateral drawing position at 45.degree.-60.degree. C. within a time (t):t=e.sup.(3.9-0.053T.sbsp.1.sup.) where e=the base of natural logarithm and T.sub.1 =film temperature during this period of time (t), which is 45.degree.-60.degree. C. The thickness profile of the film at the starting position of lateral drawing is gradually reduced from the side and portions toward the central portion of the width so that the film thickness at the central portion is 75-90% of the film thickness at the side end portions. The film is drawn in the lateral direction at an average deformation rate of 2,000-10,000%/min. and a draw ratio of 3-5 by a tenter type stretcher in such a manner that, until the mechanically set draw ratio between respective tenter clips exceeds 1.4 times the original distance, the film is expanded at an angle of up to 6.degree. with respect to the travelling direction at a tenter clip temperature T.sub.2 (T.sub.2
    • 如下制备具有优良水平度的双轴拉伸聚酰胺薄膜。 将基本上未取向的聚酰胺薄膜在45-65℃下加热,然后以至少10,000%/分钟的变形速率沿纵向拉伸。 拉伸倍数为2.7-3.5。 在t = e(3.9-0.053T1)的时间内(t),拉伸膜立即在45°-60℃转移到横向拉伸位置,其中e =自然对数的基底,T1 =膜的温度 时间(t),为45°-60℃。侧面起始位置处的膜的厚度分布从宽度的中心部分的侧面和部分逐渐减小,使得膜的厚度 中央部分是侧端部分的膜厚度的75-90%。 该膜以横向方向拉伸,平均变形率为2,000-10,000%/ min。 拉幅式拉伸机的拉伸比为3-5,直到各拉幅夹之间的机械设定拉伸倍数超过原始距离的1.4倍时,膜以6度的角度膨胀,相对于 在拉幅剪辑温度T2(T2
    • 10. 发明授权
    • Preparation of biaxially oriented polyvinyl alcohol film
    • 双轴取向聚乙烯醇薄膜的制备
    • US3985849A
    • 1976-10-12
    • US522279
    • 1974-11-08
    • Ryohta NotomiTuyoshi ShigeyoshiMasayoshi Sugiyama
    • Ryohta NotomiTuyoshi ShigeyoshiMasayoshi Sugiyama
    • B29C49/00B29C47/00B29C55/00B29C55/16C08J5/18B29D7/24D01D5/12D01F6/14
    • B29C47/0009B29C47/0026B29C2035/0855B29C47/0057B29C47/0059
    • Method for preparing a biaxially oriented polyvinyl alcohol film by extruding a mixture of polyvinyl alcohol and water, and if desired, incorporated with a polyhydric alcohol, in a tubular form, drying the tubular film to give a tubular non-stretched film having a degree of crystallization of not more than 44 % and a water content of not more than 20 % by weight, and biaxially stretching the non-stretched film at a stretching ratio of not less than 2 in each of the machine and transverse directions by means of inflation under conditions such that the film surface at the starting point of stretching is maintained at a temperature in the range from about 60.degree. to about 150.degree.C., the surface of the film reaching a maximum temperature at the middle portion of a stretching zone extending from said starting point to a point where the tube reaches a maximum diameter and the difference between maximum and minimum surface temperatures in the stretching zone does not vary more than about 15.degree.C. The prepared biaxially oriented film is excellent in tensile strength, dimensional stability and impact resistance at low temperature, and has a tensile strength of not less than 1,200 Kg./cm..sup.2, an elongation of 30 % to 80 % and a Young's modulus of not less than 10,000 kg./cm..sup.2.
    • 通过挤出聚乙烯醇和水的混合物以及根据需要与多元醇一起以管状形式挤出来制备双轴取向聚乙烯醇膜的方法,干燥管状膜以得到具有一定程度的管状非拉伸膜 结晶度不超过44%,水含量不超过20重量%,并且通过下述通气条件下的膨胀在机器和横向方向上以不小于2的拉伸比双轴拉伸未拉伸膜 使得拉伸起始点处的膜表面保持在约60℃至约150℃的温度的条件下,膜的表面在拉伸区的中间部分达到最高温度 所述起始点至管达到最大直径的点,并且拉伸区中的最大和最小表面温度之间的差不超过约15D EG C.制备的双轴取向膜在低温下的拉伸强度,尺寸稳定性和耐冲击性优异,拉伸强度不小于1200Kg / cm 2,伸长率为30%〜80%, 杨氏模量不小于10,000 kg./cm。