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    • 9. 发明授权
    • METHOD OF PACKAGING A THERMOPLASTIC COMPOSITION WITH A FILM HAVING A LOW COMPLEX VISCOSITY AND CORRESPONDING PACKAGED ARTICLE
    • 用具有低复合粘度的膜和相应的包装物包装热塑性组合物的方法
    • EP1268282B8
    • 2005-09-14
    • EP99967480.7
    • 1999-12-21
    • H.B. FULLER LICENSING & FINANCING, INC.
    • REMMERS, PeterMCKAY, Kevin W.CHANAK, Michelle
    • B65B63/08
    • B65B63/08C08L23/0815C08L2314/06C09D123/0815
    • The present inventors have discovered that an easily measured property, namely complex viscosity, directly relates to physical film compatibility and have further identified a class of polyolefin materials, which are particularly amenable to exhibiting such properties. It is important to note that this discovery assumes that the film material is first chemically compatible with the thermoplastic composition to be packaged. The invention is particularly useful for low viscosity thermoplastic compositions having a Brookfield viscosity of less than about 10,000 cPs at 350 DEG F, such as pressure sensitive hot melt adhesive compositions which are typically applied by melting the package adhesive composition in a melt tank wherein the melt tank lacks an active mixing means. The invention is also useful for hot melt adhesives that are applied by application means that are very sensitive to inhomogeneity of the combination of molten hot melt adhesive and molten packaging material such as spraying, screen printing, foaming and gravure coating hot melt application techniques.
    • 本发明人已经发现,容易测量的性质即复数粘度直接与物理膜相容性有关,并进一步确定了一类聚烯烃材料,其特别适合于表现出这种性质。 重要的是要注意,该发现假定膜材料首先与待包装的热塑性组合物化学相容。 本发明特别适用于在350°F下布鲁克菲尔德粘度小于约10,000cPs的低粘度热塑性组合物,例如通常通过将该包装粘合剂组合物熔化在熔体罐中施加的压敏热熔粘合剂组合物,其中熔体 坦克缺乏有效的混合手段。 本发明也适用于通过施加手段施加的热熔粘合剂,其对熔融热熔粘合剂和熔融包装材料的组合的不均匀性非常敏感,例如喷涂,丝网印刷,发泡和凹版涂布热熔涂布技术。