Resin molded article having a movable projecting portion
    4.
    发明授权
    Resin molded article having a movable projecting portion 失效
    具有可移动突出部分的树脂模塑制品

    公开(公告)号:US5631060A

    公开(公告)日:1997-05-20

    申请号:US597933

    申请日:1996-02-07

    摘要: A resin molded article having a moveable projecting portion suitable for use in forming a keyboard or keyboard switch and which is substantially free from flex fatigue. At least the moveable projecting portion of the molded article is formed from a resin composition containing a polyether ester block copolymer and a small amount of an alkali metal salt of an aliphatic carboxylic acid having 10 to 36 carbon atoms. The polyether ester block copolymer contains units from terephthalic acid, tetramethylene glycol and polyoxytetramethylene glycol. The resin molded article includes a thick projecting (moveable) portion, a base portion and a flexible thin side portion connecting the thick projecting portion to the base portion. The side portion has a thickness of 0.05 to 0.5 mm and a flexibility retention of at least 85%.

    摘要翻译: 一种具有适于用于形成键盘或键盘开关并且基本上没有挠曲疲劳的可移动突出部分的树脂模制品。 至少模塑制品的可移动突出部分由含有聚醚酯嵌段共聚物和少量具有10至36个碳原子的脂族羧酸的碱金属盐的树脂组合物形成。 聚醚酯嵌段共聚物含有来自对苯二甲酸,四亚甲基二醇和聚氧四亚甲基二醇的单元。 树脂成形品具有厚的突起(可移动)部分,基部和将厚的突出部分连接到基部的柔性薄侧部分。 侧部的厚度为0.05〜0.5mm,弹性保持率为85%以上。

    Resin composition and molded article
    7.
    发明授权
    Resin composition and molded article 失效
    树脂组合物和模制品

    公开(公告)号:US06262184B1

    公开(公告)日:2001-07-17

    申请号:US09409443

    申请日:1999-09-30

    IPC分类号: C08L6702

    摘要: The present invention provides a resin composition comprising polylactic acid and aliphatic polyester carbonate, which has practically adequate heat-resistance temperature, moldability, thermostability, solvent resistance and high mechanical strength, as well as a molded article thereof. In the resin composition, the Vicat softening point is 60° C. or more, the tensile modulus of elasticity is 0.9 GPa or more, the modulus in flexure is 0.6 GPa or more, and the mixing ratio of polylactic acid (A) and aliphatic polyester carbonate (B), in terms of the ratio of (A)/(B) by weight, is 95/5 to 5/95. Further, the present invention provides a biodegradable injection-molded article having improvements in mechanical characteristics and impact resistance and superior disposal properties, particularly having strength enough to make it usable as a headgear material for use in helmets. The biodegradable injection-molded article is excellent in impact resistance, comprising mainly polylactic acid (A) and aliphatic polyester (E) and/or aliphatic polyester carbonate (B). This injection-molded article has a flexural strength of 30 MPa or more and an Izod impact strength of 3 kJ/m2 or more, and it is used as helmet headgear.

    摘要翻译: 本发明提供了具有实际上足够的耐热温度,成型性,耐热性,耐溶剂性和高机械强度的聚乳酸和脂肪族聚酯碳酸酯的树脂组合物及其成型品。 在树脂组合物中,维卡软化点为60℃以上,拉伸弹性模量为0.9GPa以上,挠曲模量为0.6GPa以上,聚乳酸(A)和脂肪族 聚酯碳酸酯(B)按重量比(A)/(B)计为95/5〜5/95。 此外,本发明提供了具有机械特性和耐冲击性改善以及优异的处置性能的生物降解性注射成型制品,特别是具有足以使其可用作头盔用头盔材料的强度。 生物降解性注射成型品的耐冲击性优异,主要包括聚乳酸(A)和脂肪族聚酯(E)和/或脂肪族聚酯碳酸酯(B)。 该注射成型品的弯曲强度为30MPa以上,Izod冲击强度为3kJ / m 2以上,用作头盔头饰。