Molded nylon 4.6 article having first and second enthalpy
    1.
    发明授权
    Molded nylon 4.6 article having first and second enthalpy 失效
    具有第一和第二焓的成型尼龙4.6制品

    公开(公告)号:US4945152A

    公开(公告)日:1990-07-31

    申请号:US237711

    申请日:1988-08-29

    申请人: Erik R. Peerlkamp

    发明人: Erik R. Peerlkamp

    摘要: The invention provides molded polyamide articles and a process for making the same. The molded polyamide articles consist substantially of tetramethylene adipamide units, the articles having an increased crystallinity expressed as a first melting enthalpy which is at least 30 Joules per gram higher than a second melting enthalpy determined after subsequent solidification of the polyamide. The process comprises shaping the polyamide from the melt, cooling the resulting polyamide article, and heat treating the article in an inert gas atmosphere at a temperature of 220.degree. C. for 0.25 to 24 hours.

    摘要翻译: 本发明提供模塑聚酰胺制品及其制备方法。 模制的聚酰胺制品基本上由四亚甲基己二酰胺单元组成,所述制品具有增加的结晶度,其表示为第一熔融焓,其比随后聚酰胺凝固后测定的第二熔融焓高至少30焦耳/克。 该方法包括从熔体中成型聚酰胺,冷却所得聚酰胺制品,并在惰性气体气氛中在220℃的温度下热处理该制品0.25至24小时。

    Process for melt-shaping a polymer composition
    4.
    发明授权
    Process for melt-shaping a polymer composition 失效
    熔融成型聚合物组合物的方法

    公开(公告)号:US07786191B2

    公开(公告)日:2010-08-31

    申请号:US10258488

    申请日:2001-04-25

    IPC分类号: B29B7/00 B29B9/12

    摘要: The invention relates to a process for melt-shaping a polymer composition wherein the constituent components for the polymer composition are supplied directly to the shaping device in the form of a mixture of granules on or in which the constituent components are present. The granule mixture contains at least 3 granule-fractions containing the matrix polymer that differ in composition.The invention also relates to the granule mixture suitable for the melt-shaping process, the installation for the preparation and the process for preparing the granule mixture. The process results in a greater reproducibility and in articles with improved properties.

    摘要翻译: 本发明涉及一种用于熔融成型聚合物组合物的方法,其中用于聚合物组合物的构成组分以形成组分的颗粒混合物的形式直接供给到成形装置。 颗粒混合物含有至少3个含有组成不同的基质聚合物的颗粒级分。 本发明还涉及适用于熔融成型方法的颗粒混合物,制备装置和制备颗粒混合物的方法。 该方法产生更大的再现性和具有改进性能的制品。