DEVICE AND METHOD FOR PRODUCING THICK-WALLED MOULDED PLASTICS PARTS HAVING REDUCED SHRINKAGE SITES BY INJECTION MOLDING OR EMBOSSING
    1.
    发明申请
    DEVICE AND METHOD FOR PRODUCING THICK-WALLED MOULDED PLASTICS PARTS HAVING REDUCED SHRINKAGE SITES BY INJECTION MOLDING OR EMBOSSING 审中-公开
    用于生产具有减少的收缩部位的厚壁成型塑料部件的装置和方法通过注射成型或成型

    公开(公告)号:US20120171452A1

    公开(公告)日:2012-07-05

    申请号:US13375843

    申请日:2010-05-25

    IPC分类号: B32B27/30 B29C45/73 B29C45/76

    摘要: The invention relates to a device and method for producing thick-walled plastic molded parts by injection molding or embossing. The device comprises a mold for injection molding or embossing, having a cavity, and is characterized in that the mold comprises a wall region adjacent to the cavity, and a body removed from the cavity and adjacent to the wall region near the cavity, wherein the body of the mold is designed for a temperature T1 and the wall region is designed for a temperature T2 different from the temperature T1. According to the method, the temperature T2 of the wall region of the mold near the cavity is brought to and held at a value greater than the Vicat temperature Tv of the plastic molding mass before and/or during the injection process, wherein the temperature T2 is greater than the temperature T1 of the mold body, and the temperature T2 of the wall region near the cavity is brought to a temperature below the Vicat temperature Tv of the plastic molding mass during the solidification of the plastic molding mass. The result is thick-walled molded plastic parts, such as optical lenses and the like, having reduced shrinkage sites.

    摘要翻译: 本发明涉及通过注塑或压花制造厚壁塑料模制件的装置和方法。 该装置包括用于注射成型或压花的模具,具有空腔,其特征在于,所述模具包括与所述空腔相邻的壁区域,以及从所述空腔移除并邻近所述空腔的所述壁区域的主体,其中, 模具的主体设计为温度T1,并且壁区域设计为不同于温度T1的温度T2。 根据该方法,模具附近的模具的壁区域的温度T2被提升并保持在比注塑过程之前和/或期间的塑料模塑料的维卡温度Tv的值,其中温度T2 大于模具体的温度T1,并且在塑料模制件的固化期间,腔体附近的壁区域的温度T2达到低于塑料模制件的维卡温度Tv的温度。 结果是厚壁模制塑料部件,例如光学透镜等,具有减小的收缩位置。

    Use of polyalkyl(meth)acrylate bead polymers and moulding material for producing extruded moulded parts with a matt surface
    6.
    发明授权
    Use of polyalkyl(meth)acrylate bead polymers and moulding material for producing extruded moulded parts with a matt surface 有权
    使用聚(甲基)丙烯酸烷基酯珠粒聚合物和用于生产具有无光泽表面的挤出成型部件的成型材料

    公开(公告)号:US08399560B2

    公开(公告)日:2013-03-19

    申请号:US11661651

    申请日:2005-08-30

    摘要: The invention relates to the use of polyalkyl(meth)acrylate bead polymers with an average particle size V50 that ranges between 30 and 70 μm for improving the stress cracking resistance of moulding materials containing polyalkyl(meth)acrylate. The invention also relates to moulding materials comprising: a) at least 50 wt. % of an impact resistance modifying agent, which contains at least one polyalkyl(meth)acrylate phase; b) at least 8 wt. % of a polyalkyl(meth)acrylate bead polymer with an average particle size V50 that ranges between 30 and 70 μm; and c) between 0 and 42 wt. % of a polyalkyl(meth)acrylate with a molecular weight ranging between 20,000 and 350,000 g/mol, whereby the wt. % of the components a) to c) amounts to 100 wt. %, and to moulded bodies that can be obtained from said materials.

    摘要翻译: 本发明涉及平均粒度V50为30〜70μm的聚(甲基)丙烯酸烷基酯聚合物(聚甲基丙烯酸烷基酯)聚合物用于提高含(甲基)丙烯酸聚烷基酯的成型材料的抗应力开裂性。 本发明还涉及成型材料,其包含:a)至少50wt。 %的耐冲击改性剂,其含有至少一种(甲基)丙烯酸烷基酯相; b)至少8wt。 %的平均粒度V50为(30〜70μm)的(甲基)丙烯酸烷基酯聚合的(甲基)丙烯酸烷基酯聚合物; 和c)0至42wt。 %的分子量在20,000和350,000g / mol之间的聚(甲基)丙烯酸烷基酯,其中wt。 组分a)至c)的%相当于100wt。 %,以及可以从所述材料获得的成型体。

    Composition with increased stress cracking resistance
    7.
    发明授权
    Composition with increased stress cracking resistance 失效
    具有增加的抗开裂性的组合物

    公开(公告)号:US08227549B2

    公开(公告)日:2012-07-24

    申请号:US12600840

    申请日:2008-04-09

    摘要: Composition containing, based in each case on its total weight, A) 50.0% by weight to 99.5% by weight of at least one (meth)acrylate (co)polymer and B) 0.5% by weight to 50.0% by weight of at least one copolymer obtainable by polymerization of a monomer mixture comprising i. 70% by weight to 92% by weight of a vinylaromatic monomer and ii. 8% by weight to 30% by weight of acrylonitrile or methacrylonitrile or mixtures thereof and iii. 0% by weight to 22% by weight of at least one further monomer, the composition having a haze according to ASTM D1003 of less than 2.0% at 23° C. and a haze according to ASTM D1003 of less than 4.0% at 40° C. and the composition containing at least one (meth)acrylate (co)polymer a) having a solution viscosity in chloroform at 25° C. (ISO 1628—part 6) of greater than 55 ml/g. The moldings obtainable from the composition are distinguished in particular by improved stress cracking resistance and are suitable in particular for coverings, finishes or films.

    摘要翻译: 包含基于每种情况的总重量的组合物A)50.0重量%至99.5重量%的至少一种(甲基)丙烯酸酯(共)聚合物,和B)至少0.5重量%至50.0重量% 一种共聚物,其通过单体混合物的聚合获得,所述单体混合物包含i。 70重量%至92重量%的乙烯基芳族单体,和ii。 8重量%至30重量%的丙烯腈或甲基丙烯腈或其混合物,iii。 0重量%至22重量%的至少一种其它单体,该组合物在-23℃下具有根据ASTM D1003的雾度小于2.0%,并且根据ASTM D1003的雾度小于4.0% 40℃,组合物含有至少一种在-25℃(ISO 1628-第6部分)中溶液粘度在55ml / g以上的(甲基)丙烯酸酯(共)聚合物)a)。 可从组合物获得的模制品特别是通过改进的耐应力开裂性来区分,特别适用于覆盖物,表面处理剂或膜。

    Shaping tool for information carrier disc blanks
    9.
    发明授权
    Shaping tool for information carrier disc blanks 失效
    信息载体光盘空白的整形工具

    公开(公告)号:US06555195B1

    公开(公告)日:2003-04-29

    申请号:US09805777

    申请日:2001-03-19

    IPC分类号: B32B302

    摘要: The invention relates to a shaping tool for the injection molding or injection compression of information carrier disc blanks (11) made of polymethacrylate plastic which is suited as a component of an injection molding or injection compression machine. The shaping tool is comprised of two mold parts (1, 2), whereby one mold part (1) contains a bottom part (8) of a mold with the information data and, together with the second mold part (2), forms a cavity for the one information carrier blank and one sprue bush (4) for a sprue piece (5) in the tool having a concentrically positioned feed orifice (6). In addition, the tool comprises a impact cylinder (9) for shearing the sprue piece (5) and has an ejector pin (10). The invention is characterized in that the injection gap (SP) between the feed orifice (6) of the sprue piece (5) and the information carrier disc blank (11) is less than 0.3 mm. In addition, the cutting gap (SN) between the edge of the impact cylinder (9) and the information carrier disc blank (11) is less than 0.2 mm.

    摘要翻译: 本发明涉及一种用于注射成型或注射压缩由聚甲基丙烯酸酯塑料制成的信息载体盘坯(11)的成形工具,其适合作为注射成型或注射压缩机的组件。 成型工具由两个模具部件(1,2)组成,其中一个模具部件(1)包含具有信息数据的模具的底部(8),并且与第二模具部件(2)一起形成 用于一个信息载体坯料的空腔和用于工具中的直浇道(5)的一个浇道衬套(4),其具有同心定位的进料孔(6)。 另外,该工具包括用于剪切浇道(5)并具有推顶销(10)的冲击缸(9)。 本发明的特征在于,浇道(5)的进料孔(6)和信息载体盘坯(11)之间的喷射间隙(SP)小于0.3mm。 此外,冲击气缸(9)的边缘与信息载体盘坯(11)之间的切割间隙(SN)小于0.2mm。

    Two-step method for dehydrating plastic dispersions
    10.
    发明授权
    Two-step method for dehydrating plastic dispersions 失效
    脱水塑料分散体的两步法

    公开(公告)号:US06287470B1

    公开(公告)日:2001-09-11

    申请号:US09403770

    申请日:1999-12-13

    IPC分类号: B01D1900

    摘要: The invention relates to a method for dehydrating a two-phase liquid mixture consisting of a thermoplastic synthetic melt phase and an aqueous phase, comprising the following steps: a) coagulation of the two-phase liquid mixture in a first extruder; b) dehydration of the coagulate in a twin screw extruder with a de-watering zone and screws working in an opposite direction; c) separation of constituents by degasifying. The inventive method is characterized in that a single screw extruder or a twin screw extruder with screws working in the same direction is used as a first extruder in step a).

    摘要翻译: 本发明涉及一种使由热塑性合成熔融相和水相组成的两相液体混合物脱水的方法,包括以下步骤:a)在第一挤出机中使两相液体混合物凝结; b)在具有脱水区域的双螺杆挤出机中将凝结物脱水并沿相反方向工作的螺杆; c)通过脱气分离成分。 本发明的方法的特征在于,在步骤a)中使用具有沿相同方向工作的螺杆的单螺杆挤出机或双螺杆挤出机作为第一挤出机。