Production of fine-celled foams from styrene polymers
    9.
    发明授权
    Production of fine-celled foams from styrene polymers 失效
    从苯乙烯聚合物生产细胞泡沫

    公开(公告)号:US4446253A

    公开(公告)日:1984-05-01

    申请号:US401347

    申请日:1982-07-23

    IPC分类号: C08J9/00

    摘要: Fine-celled foams are produced by a process in which a styrene polymer is melted, the melt is mixed with a volatile blowing agent and a nucleating agent under superatmospheric pressure, the mixture is let down to atmospheric pressure, and the foam is cooled. The nucleating agent employed comprises from 0.02 to 2% by weight of the calcium salt of a long-chain fatty acid, and from 0.01 to 1% by weight of a finely divided, inorganic substance which is insoluble in the styrene polymer, a mixture of calcium stearate and magnesium oxide being preferred.

    摘要翻译: 通过熔融苯乙烯聚合物的方法,在超大气压下将熔体与挥发性发泡剂和成核剂混合,将混合物降至大气压,并将泡沫冷却,从而生产细小泡沫。 使用的成核剂包含0.02至2重量%的长链脂肪酸钙盐和0.01至1重量%的不溶于苯乙烯聚合物的细碎无机物质,混合物 硬脂酸钙和氧化镁。

    Pneumatic pressing system for a drafting frame of a spinning machine and
method of operating same
    10.
    发明授权
    Pneumatic pressing system for a drafting frame of a spinning machine and method of operating same 失效
    纺纱机牵伸架气动冲压系统及其运行方法

    公开(公告)号:US5873230A

    公开(公告)日:1999-02-23

    申请号:US989712

    申请日:1997-12-12

    CPC分类号: D01H5/52 G01M3/2815

    摘要: In the pneumatic pressing of textile strands in a drafting frame the pressure in the pressure line is monitored by a pressure sensor and/or a flowmeter and used to control a value between the pressure source and that pressure line. According to the invention a disturbance signal is outputted when the pressure in the line drops below a threshold, the control signal for the valve exceeds a threshold, the displacement of the value member exceeds a certain level and the flow rate exceeds a value so as to indicate leakage beyond a tolerance level.

    摘要翻译: 在牵伸架中的纺织品线的气动挤压中,压力线中的压力由压力传感器和/或流量计监测,并用于控制压力源和该压力线之间的值。 根据本发明,当线路中的压力下降到阈值以下时,输出干扰信号,阀门的控制信号超过阈值,值部件的位移超过一定水平,流量超过一个值,以便 指示泄漏超出公差水平。