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Process for producing small strips of synthetic material films stretched monoaxialmente termoplasticos and device for implementation of this process.
Process for producing small strips of synthetic material films stretched monoaxialmente termoplasticos and device for implementation of this process.
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机译:用于生产拉伸的单轴mente热塑性塑料薄膜的小条的方法和用于实施该方法的装置。
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摘要
1475571 Stretching polymeric ribbons BARMAG BARMER MASCHINENFABRIK AG 6 June 1974 [6 June 1973] 25201/74 Heading B5B Monoaxially drawn thermoplastic ribbons are produced by feeding an extruded film over a cutter to produce a plurality of ribbons which are drawn in at least two drawing stages above room temperature and below but adjacent the crystalline melting point, followed by heat stabilization, wherein the drawing temperature increases from one stage to the next and is dependent on the previous amount of drawing undergone by the film. The temperatures used are such that very low drawing tensions, are used, i.e. not more than 1000 ponds/mmSP2/SP. The preferred films are of polypropylene drawn up to 3 x in the first stage, and heating in the final stage being provided by a combination of heated rollers and convection heating.
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机译:1475571拉伸聚合物条带BARMAG BARMER MASCHINENFABRIK AG 1974年6月6日[1973年6月6日]标题B5B通过在切割机上喂入挤出薄膜,生产出多条色带,并在至少两个拉伸阶段对其进行拉伸,从而制得单轴拉伸热塑性条带高于室温并低于结晶熔点但随后接近晶体熔点,然后进行热稳定,其中拉伸温度从一个阶段增加到下一个阶段,并且取决于薄膜先前的拉伸程度。所使用的温度使得使用非常低的拉伸张力,即不超过1000个池塘/ mm 2 SP>。优选的膜是在第一阶段拉伸至3倍的聚丙烯薄膜,而在最后阶段通过加热辊和对流加热的组合来加热。
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