Thermoplastic resin composition and molded articles
    5.
    发明授权
    Thermoplastic resin composition and molded articles 失效
    热塑性树脂组合物和模塑制品

    公开(公告)号:US06576705B1

    公开(公告)日:2003-06-10

    申请号:US09117872

    申请日:1999-02-09

    IPC分类号: C08L6702

    摘要: The objective of the present invention lies in providing a resin composition which enables water vapor permeability to be controlled over a broad range while maintaining a high gas permeability, together with molded articles or packaging materials comprising said composition, in particular a packaging material for foodstuffs like fruit and vegetables. A thermoplastic resin composition which is characterized in that a polymer (A) containing polyether chains as structural units, polyethylene (B) of density as specified in JIS K6760 of less than 0.91 g/cm3 and a compatibilizing agent (C) are blended together in proportions by weight of A/B/C=99.5 to 0.5/0.5 to 99.5/0 to 30 (where A+B+C=100); and molded articles comprising said composition, in particular a packaging material for vegetables and fruit cultivation or foodstuffs storage.

    摘要翻译: 本发明的目的在于提供一种能够在保持高透气性的情况下在宽范围内控制水蒸气透过性的树脂组合物,以及包含所述组合物的成型制品或包装材料,特别是用于食品的包装材料 水果和蔬菜。 一种热塑性树脂组合物,其特征在于,含有作为结构单元的聚醚链的聚合物(A),JIS K6760规定的密度的聚乙烯(B)小于0.91g / cm 3,相容剂(C) A / B / C = 99.5〜0.5 / 0.5〜99.5 / 0〜30(A + B + C = 100)的重量比。 以及包含所述组合物的模塑制品,特别是用于蔬菜和水果栽培或食品储存的包装材料。

    Aromatic polyester carbonate and method for producing the same
    6.
    发明授权
    Aromatic polyester carbonate and method for producing the same 失效
    芳香族聚碳酸酯及其制造方法

    公开(公告)号:US4107143A

    公开(公告)日:1978-08-15

    申请号:US765333

    申请日:1977-02-03

    IPC分类号: C08G63/64 C08G63/62

    CPC分类号: C08G63/64

    摘要: The present invention provides a substantially linear aromatic polyester carbonate consisting essentially of hydroxybenzoic acid unit, hydroquinone unit, and carbonate unit as well as, depending on the circumstances, aromatic carboxylic acid unit, and having an inherent viscosity of at least 0.5. The present invention also provides an industrially advantageous method for producing such linear aromatic polyester carbonate through the process steps of melt-polycondensation, and, if necessary, followed by a further polycondensation in solid phase.Such aromatic polyester carbonate which the present invention provides exhibits excellent melt-forming property and melt anisotropy, hence any shaped article obtained by melt-forming of this aromatic polyester carbonate exhibits superior mechanical properties, in particular, excellent Young's modulus of longitudinal elasticity, and so on, which is highly useful as the material for industrial applications. The present invention also provides shaped articles in fiber and film forms having such excellent Young's modulus of longitudinal elasticity as produced from the abovementioned aromatic polyester carbonate.

    摘要翻译: 本发明提供基本上由羟基苯甲酸单元,氢醌单元和碳酸酯单元组成的基本上线性的芳族聚酯碳酸酯,以及根据具体情况,芳族羧酸单元,并且具有至少0.5的特性粘度。 本发明还提供了通过熔融缩聚的方法制备这种线性芳族聚酯碳酸酯的工业上有利的方法,并且如果需要,随后进一步在固相中缩聚。

    Polyester granule for melt-shaping and process for the preparation
thereof
    7.
    发明授权
    Polyester granule for melt-shaping and process for the preparation thereof 失效
    用于熔融成型的聚酯颗粒及其制备方法

    公开(公告)号:US4051112A

    公开(公告)日:1977-09-27

    申请号:US592312

    申请日:1975-07-01

    摘要: Polyester granule for melt-shaping which is composed of a difficultly crystallizable copolyester having the minimum time for half-crystallization of at least one minute, and has the surfaces resulting from cutting by a cutter, improvement in thatI. the polyester granule has an intrinsic viscosity of at least 0.55 (as measured in o-chlorophenol at 35.degree. C.),ii. the polyester granule has in its surface portion an oriented portion having an N-value of at least 0.04, the N-value being calculated by the equation,N =n..multidot..lambda.dandIii. the inside of the polyester granule other than the said surface portion has an N-value of not higher than 0.02.Said polyester granule can be prepared by cutting a copolyester melt-extrudate having an intrinsic viscosity of at least 0.55 under the conditions as will control the surface temperature t (.degree. C) of the extrudate to satisfy the expressionTg + 30.degree. C. .gtoreq. t > Tg - 15.degree. C.

    摘要翻译: 用于熔融成型的聚酯颗粒,其由具有至少一分钟的半结晶的最短时间的难结晶的共聚酯组成,并且具有由切割机切割的表面,改进为I.该聚酯颗粒具有本体 至少0.55的粘度(在35℃下测量在O-氯苯醇中)

    Naphthalate polyester filaments
    10.
    发明授权
    Naphthalate polyester filaments 失效
    萘二甲酸酯聚酯长丝

    公开(公告)号:US4060516A

    公开(公告)日:1977-11-29

    申请号:US646645

    申请日:1976-01-05

    CPC分类号: C08G63/189 D01F6/62

    摘要: Naphthalate polyester filaments, yarns or fibers consisting essentially of a naphthalate polyester which has an intrinsic viscosity of 0.3 to 3.5 and a softening point of at least 200.degree. C, and in which at least 85 mol% of the total recurring units consist of units of the formula ##STR1## wherein n is 4 or 6, and having at least one diffraction peak at a Bragg scattering angle 2.theta. = 16.3.degree. -- 16.7.degree. and/or 2.theta. = 25.3.degree. - 25.8.degree. in their X-ray diffraction. These filaments, yarns or fibers are useful especially as an electrically insulating material, an elastomeric reinforcing material, a fluid filter material, a paper-making canvas and a fastener component material.Of these, filaments, yarns or fibers of poly(tetramethylene 2,6-naphthalate) are prepared by melt-spinning the polymer thereby to form undrawn filaments having a birefringence of at lest 0.01 and a density of not more than 1.300, drawing the undrawn filaments in at least one step at a temperature of at least 60.degree. C. at a total draw ratio of at least 1.8, and then heat-treating the drawn filaments at a temperature higher than the temperature employed in the drawing step and within a range of 100.degree. to 240.degree. C. at constant length, under a restricted shrinkage of not more than 15%, or under a stretch of not more than 15%.

    摘要翻译: 萘二甲酸酯聚酯长丝,基本上由萘甲酸酯聚酯组成的纱线或纤维,其特性粘度为0.3-3.5,软化点为至少200℃,其中至少85mol%的总重复单元由 其中n为4或6,并且在其X射线衍射中在布喇格散射角2θ= 16.3°-16.7°和/或2θ= 25.3°-25.8°处具有至少一个衍射峰的式。 这些长丝,纱线或纤维特别用作电绝缘材料,弹性体增强材料,流体过滤材料,造纸帆布和紧固件组件材料。