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    • 2. 发明授权
    • Spinning pump for polyamides
    • 聚酰胺纺纱泵
    • US5618172A
    • 1997-04-08
    • US532556
    • 1995-09-15
    • Luzius Berger
    • Luzius Berger
    • F04C2/18F04C2/08F04C15/06
    • F04C15/06F04C2/086F04C2250/10
    • The spinning pump for melt spinning of polyamides includes a back plate (5), a front plate (7), a central plate (6) extending between the front plate (7) and the back plate (5) and a pair of gear wheels (8,8'). The central plate (6) is provided with a bore (10) for feeding a melt into the central plate and another bore (10') for feeding the melt out of the central plate. The bores (10,10') each have transverse partially circular cross sections with cross-sectional areas decreasing from the front side (6') of the central plate (6) to the back side (6"). The partially circular cross sections of each of the bores (10,10') have center points on a parabolic arc or path (13b) from the front side (6') to the back side (6") of the central plate (6). This shape and structure for the bores (10,10') prevents cracked deposits from forming inside the pump channels and increases the productivity of top-quality melt extrusion by over 10%.
    • PCT No.PCT / CH95 / 00029 Sec。 371 1995年9月15日第 102(e)1995年9月15日PCT PCT 1995年2月7日提交PCT公布。 WO95 / 22002 PCT出版物 日期:1995年8月17日聚酰胺熔融纺丝用纺丝泵包括背板(5),前板(7),在前板(7)和背板(5)之间延伸的中心板(6) 一对齿轮(8,8')。 中心板(6)设置有用于将熔体输送到中心板的孔(10)和用于将熔体输送出中心板的另一孔(10')。 孔(10,10')各自具有横截面积的横截面,横截面积从中心板(6)的前侧(6')向后侧(6“)减小。 每个孔(10,10')的部分圆形横截面具有从中心板的前侧(6')到后侧(6“)的抛物线弧或路径(13b)上的中心点 6)。 用于孔(10,10')的这种形状和结构防止在泵通道内形成破裂的沉积物,并将顶级熔体挤出的生产率提高超过10%。
    • 5. 发明授权
    • Process for subsequent condensation of polycondensates, in particular of
polyamide 6.6
    • 缩聚物,特别是聚酰胺6.6的随后缩合的方法
    • US5859177A
    • 1999-01-12
    • US945930
    • 1997-08-26
    • Luzius BergerHans StehrNiklaus Zemp
    • Luzius BergerHans StehrNiklaus Zemp
    • C08G69/28C08G69/46C08G69/48C08G85/00C08J3/00C08J5/00
    • C08G69/46C08G69/28C08G69/48C08J3/00C08J5/00C08J2377/00
    • The process for single-stage postcondensation of a polycondensate in a fluidized bed reactor (1) includes feeding the polycondensate through the fluidized bed reactor (1); circulating a main stream of nitrogen carrier gas through the fluidized bed reactor; withdrawing a fractional stream at a temperature of from 20.degree. to 230.degree. C. from the main stream of the nitrogen carrier gas; passing the fractional stream through a water-filled gas scrubber column (15) so as to form a conditioned stream of the nitrogen carrier gas with a predetermined dew point between 10.degree. to 80.degree. C.; and returning the conditioned stream to the main stream. In preferred embodiments the polycondensate is allowed to cool during a cool-down stage at an end of the postcondensation and the withdrawal of the fractional stream from the main stream is halted, but the circulating of the main stream through the fluidized bed reactor is continued during the cool-down stage.
    • PCT No.PCT / CH95 / 00307 Sec。 371日期:1997年8月26日 102(e)日期1997年8月26日PCT提交1995年12月27日PCT公布。 公开号WO97 / 24389 日期1997年7月10日在流化床反应器(1)中缩聚物的单阶段缩聚方法包括将缩聚物进料通过流化床反应器(1)进料; 使氮气载气的主流循环通过流化床反应器; 从氮气载气的主流中抽出温度为20〜230℃的分馏流; 使分数流通过填充水的气体洗涤塔(15),以形成具有10至80℃的预定露点的氮气载气的调节流。 并将条件流返回到主流。 在优选的实施方案中,使缩聚物在缩合结束时在冷却阶段冷却,停止从主流中分离出的物流,但主流通过流化床反应器的循环是在 冷静阶段。