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    Biodegradable films and sheets suitable for use as coatings, wraps and packaging materials
    38.
    发明授权
    Biodegradable films and sheets suitable for use as coatings, wraps and packaging materials 有权
    适用于涂料，包装和包装材料的可生物降解膜和片材

    公开(公告)号：US07297394B2

    公开(公告)日：2007-11-20

    申请号：US10087718

    申请日：2002-03-01

    申请人： Kishan Khemani ,  Harald Schmidt ,  Simon K. Hodson

    发明人： Kishan Khemani ,  Harald Schmidt ,  Simon K. Hodson

    IPC分类号： B32B27/00 ,  B32B33/00

    CPC分类号： C08J5/18 ,  C08J2367/02 ,  C08J2367/04 ,  C08J2403/02 ,  C08K5/0016 ,  C08L3/02 ,  C08L67/02 ,  C08L67/04 ,  C08L77/12 ,  Y10T428/231 ,  Y10T428/234 ,  Y10T428/24 ,  Y10T428/24058 ,  Y10T428/24124 ,  Y10T428/24273 ,  Y10T428/249953 ,  Y10T428/249955 ,  Y10T428/249978 ,  Y10T428/25 ,  Y10T428/254 ,  C08L2666/18 ,  C08L2666/02 ,  C08L2666/26 ,  C08L67/03 ,  C08L91/06

    摘要： Biodegradable polymer blends suitable for laminate coatings, wraps and other packaging materials are manufactured from at least one “hard” biopolymer and at least one “soft” biopolymer. “Hard” biopolymers tend to be more brittle and rigid and typically have a glass transition temperature greater than about 10° C. “Soft” biopolymers tend to be more flexible and pliable and typically have a glass transition temperature less than about 0° C. While hard and soft polymers each possess certain intrinsic benefits, certain blends of hard and soft polymers have been discovered which possess synergistic properties superior to those of either hard or soft polymers by themselves. Biodegradable polymers include polyesters, polyesteramides, polyesterurethanes, thermoplastic starch, and other natural polymers. The polymer blends may optionally include an inorganic filler. Films and sheets made from the polymer blends may be textured so as to increase the bulk hand feel. Wraps will typically be manufactured to have good “dead-fold” properties so as to remain in a wrapped position and not spring back to an “unwrapped” form.

    摘要翻译： 适用于层压涂层，包装和其他包装材料的生物可降解聚合物共混物由至少一种“硬”生物聚合物和至少一种“软”生物聚合物制成。 “硬”生物聚合物倾向于更脆和刚性，并且通常具有大于约10℃的玻璃化转变温度。“软”生物聚合物倾向于更柔软和柔韧，并且通常具有低于约0℃的玻璃化转变温度。 虽然硬和软聚合物各自具有某些固有的优点，但已经发现了硬和软聚合物的某些共混物，其本身具有优于硬聚合物或软聚合物的协同性质。 可生物降解的聚合物包括聚酯，聚酯酰胺，聚酯氨酯，热塑性淀粉和其他天然聚合物。 聚合物共混物可任选地包括无机填料。 由聚合物共混物制成的薄膜和薄片可以是纹理化的，以便增加手感。 通常将制造包装以具有良好的“折叠”性质，以便保持在包裹位置并且不弹回到“展开”形式。