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    Foamed starch compositions, articles and methods
    2.
    发明公开
    Foamed starch compositions, articles and methods 失效
    GeschäumteStärkezusammensetzungen，Gegenständeund Verfahren

    公开(公告)号：EP1300228A2

    公开(公告)日：2003-04-09

    申请号：EP02026869.4

    申请日：1995-09-12

    申请人： E. KHASHOGGI INDUSTRIES

    发明人： Andersen, Per, Just ,  Hodson, Simon

    IPC分类号： B29C44/02 ,  C08J9/12

    CPC分类号： B32B5/18 ,  B05B11/0037 ,  B05B11/30 ,  B05C5/0245 ,  B27N3/002 ,  B27N3/007 ,  B29C33/04 ,  B29C33/10 ,  B29C33/20 ,  B29C33/36 ,  B29C39/003 ,  B29C39/42 ,  B29C43/003 ,  B29C43/06 ,  B29C43/34 ,  B29C43/36 ,  B29C43/38 ,  B29C44/0407 ,  B29C67/202 ,  B29C70/025 ,  B29C70/12 ,  B29C70/50 ,  B29C71/0009 ,  B29C2043/3433 ,  B29C2043/3615 ,  B29C2043/3623 ,  B29K2003/00 ,  B29K2105/0064 ,  B29K2105/04 ,  B29K2105/06 ,  B29K2105/12 ,  B29K2105/16 ,  B32B1/02 ,  B32B5/14 ,  B32B2262/062 ,  B32B2305/08 ,  B32B2305/30 ,  B32B2305/70 ,  B32B2307/7246 ,  B32B2317/20 ,  B32B2439/70 ,  B65D43/162 ,  B65D65/466 ,  B65D2565/385 ,  C04B20/0048 ,  C04B26/285 ,  C04B40/006 ,  C08J9/0085 ,  C08J2303/00 ,  C08L3/00 ,  E05D1/02 ,  E05Y2900/602 ,  Y02A40/961 ,  Y02W90/11 ,  C08L2666/02

    摘要： Articles, particularly containers and packaging materials, having a starch-bound cellular matrix reinforced with substantially uniformly dispersed fibers and methods for manufacturing the articles. High strength articles that have adequate flexibility and toughness immediately or very shortly after being demolded without the need for subsequent conditioning are molded from compositions having a starch-based binder and fibers that are uniformly dispersed by means of a high yield stress fluid fraction within the starch-based composition. In a two-step mixing process, a preblended mixture is formed by gelating a portion of the starch-based binder or other thickening agent in water to form a liquid phase having high yield stress into which the fibers are substantially uniformly dispersed. At least some of the fibers preferably have an average length of at least about 2 mm and an aspect ratio of at least about 25:1. The remaining starch-based binder, water, and other desired admixtures, such as mold-release agents, inorganic fillers, rheology-modifying agents, plasticizers, integral coating or sealing materials, and dispersants, are added to the preblended mixture to form a moldable starch-based composition, which is molded between heated molds to produce form-stable articles having a desired shape and a selectively controlled foamed structural matrix. Such articles can replace articles presently made from conventional materials like paper, paperboard, polystyrene, plastic, or other organic-based materials and have especial utility in the mass-production of containers, particularly food and beverage containers.

    摘要翻译： 具有用基本均匀分散的纤维增强的淀粉结合的细胞基质的制品，特别是容器和包装材料以及用于制造制品的方法。 在具有淀粉基粘合剂的组合物和通过淀粉中的高屈服应力流体馏分均匀分散的纤维的情况下，由脱模后立即或非常短时间而不需要后续调理的具有足够柔韧性和韧性的高强度制品成型 的组成。 在两步混合过程中，通过将一部分淀粉基粘合剂或其它增稠剂在水中凝胶化以形成具有高屈服应力的液相，其中纤维基本上均匀分散在其中形成预混合物。 至少一些纤维优选具有至少约2mm的平均长度和至少约25:1的纵横比。 将剩余的淀粉基粘合剂，水和其它所需的混合物，例如脱模剂，无机填料，流变改性剂，增塑剂，整体涂料或密封材料和分散剂加入到预混合物中以形成可成型 基于淀粉的组合物，其在加热的模具之间模制以产生具有所需形状的形式稳定的制品和选择性控制的泡沫结构基质。 这样的物品可以代替目前由常规材料制成的物品，如纸，纸板，聚苯乙烯，塑料或其他有机基材料，并且在批量生产容器，特别是食品和饮料容器中具有特别的用途。