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    • 5. 发明授权
    • Apparatus for forming heat treated blown thermoplastic articles
    • 用于形成热处理的热塑性塑料制品的装置
    • US4233022A
    • 1980-11-11
    • US922931
    • 1978-07-10
    • Thomas E. BradySantos W. Go
    • Thomas E. BradySantos W. Go
    • B29C49/48B29C49/64B29C71/02B29C17/07B29C25/00
    • B29C49/64B29C49/4823B29C71/02B29C2043/527B29C2049/4846B29K2995/004Y10S264/903
    • A method and apparatus are disclosed for developing a strain crystallized morphology in blowbottles of thermoplastic material by a heat treatment process subsequent to a blow molding operation. In a first embodiment, the blow mold itself includes means for differentially heating the blown article along its length so that only those portions which have been significantly molecularly oriented are heat treated. In a second embodiment, separate mold-shaped members are mounted adjacent the blow mold to receive the blown articles to apply the desired heat treatment process. In the method, an essentially amorphous thermoplastic parison is expanded in a blow molding operation at a temperature conducive to molecular orientation and strain induced crystallization. Then, the highly molecularly oriented bottle portions are heat treated to develop crystalline growth, while other non-molecularly oriented bottle portions may be simultaneously cooled.
    • 公开了一种用于通过在吹塑操作之后的热处理工艺来开发热塑性材料的吹塑瓶中的应变结晶形态的方法和装置。 在第一实施例中,吹塑模具本身包括用于沿着其长度差异加热吹塑制品的装置,使得只有那些已被显着分子取向的部分被热处理。 在第二实施例中,分开的模具构件安装在吹塑模具附近以接收吹塑制品以施加所需的热处理工艺。 在该方法中,基本上无定形的热塑性型坯在吹塑操作中在有利于分子取向和应变诱导结晶的温度下膨胀。 然后,对高分子取向的瓶部进行热处理,以形成结晶生长,而其它非分子取向的瓶部可以同时冷却。
    • 8. 发明授权
    • Method of forming articles from thermoplastic materials
    • 从热塑性材料制成制品的方法
    • US4153667A
    • 1979-05-08
    • US838613
    • 1977-10-03
    • Thomas E. BradyNicholas J. Curto
    • Thomas E. BradyNicholas J. Curto
    • B29C49/00B29C49/12B29C49/64B29C17/07
    • B29C49/0005B29C49/12B29C49/6409B29K2067/00
    • A method is disclosed for enhancing the yield strength and density of polyethylene terephthalate and other similar thermoplastic materials which are susceptible to strain hardening. In the method, the plastic material is thermally conditioned to a temperature within a range conducive to molecular orientation, and then is mechanically conditioned by stretching in a first direction to a length at least about 2.6 to 2.75 times the original length. Thereafter, the plastic material is stretched in a second direction, with strain hardening and strain-induced crystallization increasing drastically substantially immediately upon the initiation of the second stretching operation due to the mechanical conditioning by elongation during the first stretch. The invention is particularly suitable for forming blow molded containers, where a blowable parison or preform is first stretched along its longitudinal axis to the critical length and is then extensively strain hardened while being blown to the configuration of the container.
    • 公开了一种提高易受应变硬化影响的聚对苯二甲酸乙二醇酯和其它类似热塑性材料的屈服强度和密度的方法。 在该方法中,将塑料材料调节至有利于分子取向范围内的温度,然后通过在第一方向上拉伸至原始长度的至少约2.6至2.75倍的长度来机械调节。 此后,塑料材料在第二方向上被拉伸,由于在第一次拉伸期间通过伸长机械调节,第二次拉伸操作开始时,应变硬化和应变诱导结晶基本上立即急剧增加。 本发明特别适用于形成吹塑容器,其中可吹塑型坯或预型件首先沿着其纵向轴线拉伸至临界长度,然后在吹入容器的构型的同时被广泛应变硬化。