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    • 4. 发明授权
    • Multilayer heat-shrinkable films with improved mechanical properties
    • 具有改善机械性能的多层热收缩薄膜
    • US6110570A
    • 2000-08-29
    • US545127
    • 1995-10-18
    • Mario PaleariTito Fornasiero
    • Mario PaleariTito Fornasiero
    • B65D65/40B29C61/06B29K23/00B29K105/02B29L9/00B32B7/02B32B27/08B32B27/28C08J5/18B23B27/30B23B27/32
    • B32B27/08Y10S428/91Y10T428/1328Y10T428/2495Y10T428/2826Y10T428/2878Y10T428/31913Y10T428/3192Y10T428/31928
    • A multilayer heat-shrinkable film comprisesa heat-sealable layer (a);an inner layer (b) comprising a polymer selected from the group consisting of ethylene-vinyl acetate copolymers containing from 4 to 28% by weight of vinyl acetate units and with a fractional Melt Index, and ethylene-alkyl acrylate copolymers containing from 9 to 28% by weight of alkyl acrylate units and with a fractional Melt Index;an inner layer (c), face-to-face in contact with layer (b), comprising a polymer selected from the group consisting of ethylene-acrylic acid copolymers, ethylene-methacrylic acid copolymers, ethylene-vinyl acetate copolymers, ethylene-alkyl acrylate copolymers, heterogeneous ethylene-.alpha.-olefin copolymers, and homogeneous ethylene-.alpha.-olefin copolymers; andan additional layer (d) comprising a polymer selected from the group consisting of ethylene-vinyl acetate copolymers containing from 4 to 28% by weight of vinyl acetate units and with a fractional Melt Index, and ethylene-alkyl acrylate copolymers containing from 9 to 28% by weight of alkyl acrylate units and with a fractional Melt Index; face-to-face in contact with the side of layer (c) which is not in contact with layer (b);wherein the composition of layer (c) is different from that of layer (b) and (d), and the ratios by weight between layer (b) and layer (c), and between layer (d) and layer (c) are comprised between 0.125 to 1 and 8 to 1.The heat-shrinkable films according to the invention have very good mechanical properties such as puncture resistance, high shrink and good optical properties which render them particularly suitable for e.g. packaging of frozen foods.
    • 多层热收缩膜包括可热封层(a); 包含选自乙烯 - 乙酸乙烯酯共聚物的聚合物的内层(b),其包含4至28重量%的乙酸乙烯酯单元和分数熔体指数,以及含有9至28的乙烯 - 丙烯酸烷基酯共聚物 重量百分比的丙烯酸烷基酯单元和分数熔体指数; 包含选自乙烯 - 丙烯酸共聚物,乙烯 - 甲基丙烯酸共聚物,乙烯 - 乙酸乙烯酯共聚物,乙烯 - 乙酸乙烯酯共聚物,乙烯 - 乙酸乙烯酯共聚物,乙烯 - 丙烯酸共聚物,乙烯 - 丙烯酸酯共聚物,异质乙烯-α-烯烃共聚物和均相乙烯-α-烯烃共聚物; 和包含选自乙烯 - 乙酸乙烯酯共聚物的乙烯 - 乙酸乙烯酯共聚物的另外的层(d),其包含4至28重量%的乙酸乙烯酯单元和分数熔体指数,以及乙烯 - 丙烯酸烷基酯共聚物,其含有9至 28重量%丙烯酸烷基酯单元和分数熔体指数; 与不与层(b)接触的层(c)的侧面接触面对面; 其中层(c)的组成不同于层(b)和(d)的组成,层(b)和层(c)之间以及层(d)和层(c)之间的重量比是 包含在0.125-1和8:1之间。根据本发明的热收缩膜具有非常好的机械性能,例如抗穿刺性,高收缩性和良好的光学性能,使得它们特别适合于例如 包装冷冻食品。
    • 6. 发明授权
    • Thermoplastic polymer composition having a thermoplastic elastic polymer
and a block copolymer
    • 具有热塑性弹性聚合物和嵌段共聚物的热塑性聚合物组合物
    • US6096435A
    • 2000-08-01
    • US35873
    • 1998-03-06
    • Kazuhiko MaekawaMasanari UnoAtsushi ItohHiroshi HayashiharaKazushige IshiuraShigeru KawaharaShiroh Kishii
    • Kazuhiko MaekawaMasanari UnoAtsushi ItohHiroshi HayashiharaKazushige IshiuraShigeru KawaharaShiroh Kishii
    • B32B27/30C08L23/02C08L53/02C09J153/02B23B27/08C08L31/02C08L53/00B23B27/30
    • C08L23/02C08L53/02C08L53/025
    • A thermoplastic polymer composition is provided that includes 100 parts by weight of a block copolymer and/or its hydrogenate having polymer blocks of an aromatic vinyl compound and polymer blocks of a conjugated diene compound, and from 5 to 95 parts by weight of a block copolymer having polymer blocks of an aromatic vinyl compound and/or an olefinic compound and polymer blocks having a constitutional unit derived from a (meth) acrylic compound, a laminate containing a layer of the composition, and a hot-melt adhesive that includes the composition. Because it has good melt adhesiveness, the composition of the invention can firmly adhere in melt to various polar or non-polar materials. Using the composition, it is easy to produce laminates having a layer of the composition and a layer of some other material, through melt shaping or any other melt adhesion techniques. Since the composition of the invention is satisfactorily elastic and flexible, the laminates having a layer of the composition on their surface are flexible and elastic and have a good feel, and, in addition, they are safe because of their shock absorbability and cushionability.
    • 提供一种热塑性聚合物组合物,其包含100重量份的嵌段共聚物和/或其具有芳族乙烯基化合物的聚合物嵌段和共轭二烯化合物的聚合物嵌段的氢化物和5至95重量份的嵌段共聚物 具有芳族乙烯基化合物和/或烯烃化合物的聚合物嵌段和具有衍生自(甲基)丙烯酸类化合物的结构单元的聚合物嵌段,含有该组合物的层的层压体和包含该组合物的热熔性粘合剂。 因为具有良好的熔融粘合性,所以本发明的组合物可以熔融地牢固地粘附到各种极性或非极性材料中。 使用该组合物,通过熔融成型或任何其它熔融粘附技术,易于制备具有组合物层和一些其它材料层的层压体。 由于本发明的组合物具有令人满意的弹性和柔性,所以在其表面上具有组合物层的层压体是柔性和弹性的并且具有良好的手感,并且由于它们的冲击吸收性和缓冲性,它们是安全的。