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    • 117. 发明授权
    • Self-release foam laminate
    • 自发泡沫层压板
    • US4675232A
    • 1987-06-23
    • US864483
    • 1986-05-19
    • Martin I. EdenbaumBorys Rybalka
    • Martin I. EdenbaumBorys Rybalka
    • C08J5/12C08J9/00C08L75/04C09J7/02B32B7/04B32B27/40B05D3/02
    • C08J9/0023C08J5/12C09J7/0289C08J2375/04C08L75/04Y10S428/906Y10T428/249983Y10T428/28Y10T428/2883Y10T428/2887Y10T428/2896
    • A method of mechanically frothing and casting an aqueous polyurethane dispersion yields a foam which, when rolled, wound or stacked, is self-releasing from the pressure sensitive adhesive layer co-cured therewith. The method includes admixing an aqueous ionic polyurethane dispersion with a stearate stabilizer and an optional aziridine crosslinking agent, frothing and casing the admixture, and co-curing the resultant foam sheet with a pressure sensitive adhesive layer. Before frothing, the polyurethane dispersion contains particles having an average size of less than one micron, and contains between 35 and 70 percent by weight of the polyurethane dispersion, between 13 and 50 percent by weight of a 33 percent by weight dispersion of a stearate salt, and up to 33 percent by weight of polyfunctional aziridine. The foam produced from the frothed admixture provides a substrate with which an uncured pressure sensitive adhesive can firmly co-cure but to which the cured adhesive demonstrates readily removable adhesion. The laminate of the foam with a pressure sensitive adhesive thus provides either a medical dressing, or a general purpose tape for industrial use, which may be stacked or self-wound without release paper.
    • 机械起泡和浇铸水性聚氨酯分散体的方法产生泡沫,当被卷起,卷绕或层叠时,它们与与其共固化的压敏粘合剂层自发释放。 该方法包括将水性离子聚氨酯分散体与硬脂酸酯稳定剂和任选的氮丙啶交联剂混合,起泡并包住混合物,并用压敏粘合剂层共混固化所得泡沫片材。 在起泡之前,聚氨酯分散体含有平均粒度小于1微米的颗粒,并且含有35至70重量%的聚氨酯分散体,13至50重量%的33重量%的硬脂酸盐分散体 ,多达33重量%的多官能氮丙啶。 由发泡混合物生产的泡沫提供了一种基底,未固化的压敏粘合剂可以通过该基底牢固地共固化,而固化的粘合剂显示出易于拆除的粘附。 泡沫与压敏粘合剂的层压体因此提供医疗敷料或工业用途的通用胶带,其可以堆叠或自动缠绕而没有剥离纸。
    • 118. 发明授权
    • Substrate with differential adhesion
    • 基板与差分粘合
    • US4554193A
    • 1985-11-19
    • US612381
    • 1984-05-21
    • Nancy D. Erickson
    • Nancy D. Erickson
    • A47G1/16C08L23/06C09J7/02A61F13/02
    • C09J7/0246A47G1/168C09J7/0289C08L23/06Y10T428/1452Y10T428/249982Y10T428/249983Y10T428/28Y10T428/2848
    • Bonding means for achieving differential adhesion of articles such as picture frames, posters, or other decorative items to wall surfaces and the like. The bonding device has adhesives secured to each of two major surfaces, with the adhesive having differential adhesion characteristics. A first adhesive is selected to achieve permanent bonding of the bonding means to the article to be displayed, with the second adhesive layer being an adhesive with low peel-low shear properties to permit removal from the wall surface whenever desired. The second adhesive provides semi-permanent positioning of the article being displayed, but permits removal thereof upon demand. The bonding means comprises a substrate with a first substantially permanent adhesive layer secured to one surface thereof, and with a co-extruded polyolefin-polyester film being bonded to the second surface thereof, and including a second adhesive layer applied to the polyester surface of the co-extruded film portion.
    • 用于实现诸如相框,海报或其他装饰物品的物品与墙壁表面等的不均匀粘合的粘结装置。 粘合装置具有固定到两个主表面中的每一个上的粘合剂,其粘合剂具有差的粘合特性。 选择第一粘合剂以实现粘合装置与要显示的制品的永久粘合,其中第二粘合剂层是具有低剥离 - 低剪切性能的粘合剂,以允许在需要时从壁表面移除。 第二粘合剂提供正在显示的制品的半永久性定位,但是当需要时允许去除它。 接合装置包括具有固定到其一个表面上的第一基本上永久的粘合剂层的基底,并且共挤出的聚烯烃 - 聚酯膜与其第二表面结合,并且包括施加到所述聚酯表面的第二粘合剂层 共挤膜部分。