Process for making thermoplastic profiles having reduced melt fracture
    9.
    发明授权
    Process for making thermoplastic profiles having reduced melt fracture 有权
    制造具有减少熔体断裂的热塑性型材的方法

    公开(公告)号:US6100320A

    公开(公告)日:2000-08-08

    申请号:US275611

    申请日:1999-03-24

    CPC classification number: C08K5/098

    Abstract: In a process for producing a profile by profile extrusion of a thermoplastic resin, a melt of the thermoplastic resin is extruded through a die to form the profile. The process is improved by utilizing a thermoplastic resin having a composition of from about 99.95 to about 98.0 weight percent amorphous or semicrystalline polyester and from about 0.05 to about 2.0 weight percent of a zinc salt of an organic acid. The improvement of the process is either by increasing speed or decreasing temperature of a profile extrusion process already operating at a maximum speed and/or temperature with experiencing melt fracture. When melt fracture is present in the profile extrusion process, a method for reducing melt fracture in a profile is accomplished by combining from about 99.95 to about 98.0 weight percent amorphous or semicrystalline polyester and from about 0.05 to about 2.0 weight percent of a zinc salt of an organic acid to form a melt, extruding the melt through an orifice of a die at a temperature and a speed to form an extruded article having a shape, and thereafter quenching the extruded article to form a profile.

    Abstract translation: 在通过热塑性树脂的型材挤出生产型材的方法中,通过模头挤出热塑性树脂的熔体以形成轮廓。 通过使用具有约99.95至约98.0重量%的无定形或半结晶聚酯和约0.05至约2.0重量%的有机酸锌盐的组合物的热塑性树脂来改进该方法。 该方法的改进是通过在经历熔体断裂的情况下已经在最大速度和/或温度下运行的型材挤出方法的速度增加或降低温度。 当在型材挤出方法中存在熔体断裂时,通过将约99.95至约98.0重量%的无定形或半结晶聚酯和约0.05至约2.0重量%的锌盐的锌盐 有机酸以形成熔体,通过模具的孔口以温度和速度挤出熔体以形成具有形状的挤出制品,然后淬火挤压制品以形成轮廓。

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