利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

157 条记录 (耗时 0.02 秒)

    Process and apparatus for the production of additive-containing synthetic linear polymers
    86.
    发明授权
    Process and apparatus for the production of additive-containing synthetic linear polymers 失效
    用于生产含添加剂的合成线性聚合物的方法和设备

    公开(公告)号：US4221692A

    公开(公告)日：1980-09-09

    申请号：US946531

    申请日：1978-09-27

    申请人： Giorgio Lambertini ,  Gianfranco Sala

    发明人： Giorgio Lambertini ,  Gianfranco Sala

    IPC分类号： B01F3/08 ,  B01F5/04 ,  B01F5/10 ,  B29B7/94 ,  B29C47/10 ,  C08J3/20 ,  C08L77/00

    CPC分类号： B29C47/1063 ,  B01F3/088 ,  B01F5/0451 ,  B29B7/94 ,  B29C47/0004 ,  C08J3/201 ,  B01F2005/0626 ,  B01F2005/0629 ,  B01F5/10 ,  B29C47/0014 ,  B29K2077/00 ,  B29K2105/0005 ,  B29K2105/0008 ,  B29K2105/0032 ,  Y10S260/21

    摘要： A process for the production of synthetic linear polymers which contain atives is described, in which the polymer and the additives, both in the fluid state, are mixed, the resulting mixture is homogenized, and the homogenized mixture is in part conveyed to apparatus which uses it to make a product and in part is recycled, the recycled amount being preferably at least 5% of the total weight of the mixture. The preferred polymers are polyamides. The additives may be of any kind, e.g. antistatics, and they may be added as such or as a master batch consisting of a polymeric base containing finely particulated solid materials such as carbon black, matting agents or pigments. An apparatus for carrying out the process is also described, which comprises means for mixing fluid polymer with fluid additive, means for homogenizing the stream of the resulting mixture flowing through the apparatus, and means for recycling part of the homogenized stream to a zone of the apparatus upstream of the homogenizing means and for conveying the remaining part to an apparatus for subsequent processing. Static mixters may be used to homogenize the aforesaid mixture. The amount of the mixture that is recycled may be varied by suitable means such as a variable delivery pump. A particular preferred device for mixing polymer with additive is also described, which comprises valve means for preventing the polymer from backing up into the additive feed conduit.

    摘要翻译： 描述了生产含有添加剂的合成线性聚合物的方法，其中混合了流体状态的聚合物和添加剂，将所得混合物均质化，将均化后的混合物部分输送到使用 为了制造产品并且部分地被再循环，回收量优选为混合物总重量的至少5％。 优选的聚合物是聚酰胺。 添加剂可以是任何种类的，例如 抗静电剂，并且它们可以原样添加或由含有细颗粒固体材料如炭黑，消光剂或颜料的聚合物基质组成的母料。 还描述了一种用于进行该方法的设备，其包括用于将流体聚合物与流体添加剂混合的装置，用于使流过该设备的所得混合物的流均匀化的装置，以及将部分均质流再循环到该区域的装置 在均质装置上游的装置，并将剩余部分输送到用于随后处理的装置。 静态混合器可用于均化上述混合物。 回收的混合物的量可以通过合适的方式改变，例如可变输送泵。 还描述了用于将聚合物与添加剂混合的特别优选的装置，其包括用于防止聚合物备份到添加剂进料管道中的阀装置。

    Process for shaping a polymeric object
    87.
    发明授权
    Process for shaping a polymeric object 有权

    公开(公告)号：US11919232B2

    公开(公告)日：2024-03-05

    申请号：US17058280

    申请日：2019-05-10

    申请人： SABIC GLOBAL TECHNOLOGIES B.V.

    发明人： Hao Gu ,  Richard Schouwenaar ,  Zahir Bashir ,  Lanti Yang

    IPC分类号： B29C64/153 ,  B29C64/223 ,  B29C64/245 ,  B29C64/35 ,  B33Y10/00 ,  B33Y70/10 ,  B29K67/00 ,  B29K105/00

    CPC分类号： B29C64/153 ,  B29C64/223 ,  B29C64/245 ,  B29C64/35 ,  B33Y10/00 ,  B33Y70/10 ,  B29K2067/003 ,  B29K2067/006 ,  B29K2067/046 ,  B29K2105/0008 ,  B29K2105/251

    摘要： The present invention relates to a process for moulding a polymeric object, the process comprising the steps of: (a) providing a substantially flat horizontally positioned layer of a material, the layer being a film or sheet; (b) providing a layer of a thermoplastic powder onto the layer provided under (a); (c) subjecting a pre-defined part of the thermoplastic powder to irradiation to heat the pre-defined part of the thermoplastic powder to a temperature at which the thermoplastic fuses or sinters onto at least a part of the flat layer of material; (d) terminating the exposure to irradiation; (e) providing a further layer of the thermoplastic powder onto the layer provided under (b); (f) subjecting a pre-defined part of the thermoplastic powder of the layer provided under (e) to irradiation to heat the pre-defined part of the thermoplastic powder to a temperature at which the thermoplastic fuses or sinters onto at least a part of the flat layer of the material fused under (c); (g) terminating the exposure to irradiation; (h) repeating steps (e)-(g) for as many cycles as required to complete the shape of the desired polymeric object; (i) removing the fraction of thermoplastic powder that has not been fused or sintered; and (j) optionally removing the substantially flat layer as provided under (a) from the polymeric object; wherein the surface area of the substantially flat layer of material is at least 200% of the surface area of that layer produced under steps (c)-(h) having the largest surface area. Such process allows for the production of small series or uniquely designed objects at low energy consumption wherein the objects exhibit high dimensional stability.