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    • 4. 发明申请
    • PROCESS FOR THE PRODUCTION OF A FOAMED ARTICLE
    • 生产泡沫物品的过程
    • US20100243128A1
    • 2010-09-30
    • US12677414
    • 2008-09-18
    • Kristiaan Bracke
    • Kristiaan Bracke
    • B32B38/08B29C44/06B29C44/24B29C44/32
    • B29C44/1209B29C44/22B29C44/5618C08J9/405C08J2205/05C08J2375/04C08J2461/00C08J2475/00
    • The foamed article is produced starting from a core layer (1) which comprises a flexible, open-cell foam having voids forming at least 90% of the volume of the open-cell foam. The core layer (1) is applied in a mould (6, 8), optionally together with an upper (3) and/or a lower cover layer (2), between a lower (5) and an upper mould surface (9) thereof. The mould (6, 8) is closed and a curable, foamable composition (7) is allowed to foam in the mould to produce a further foam filling the voids of the open-cell foam. In order to enable to use less foamable composition (7) to fill the voids of the open-cell foam, the core layer (1) is laid onto the lower mould surface (5) and the foamable composition (7) is sprayed onto the core layer (1) lying onto the lower mould surface so that the foamable composition (7) can penetrate at least partially by gravity into the open-cell foam core layer (1). Moreover, the foamable composition (7) has a dynamic viscosity, measured at a shear rate of 1/s, of lower than 1000 mPa·s when arriving onto the core layer (1).
    • 泡沫制品从芯层(1)开始制造,该芯层包括柔软的开孔泡沫体,其具有形成开孔泡沫体积的至少90%的空隙。 将核心层(1)可选地与上部(3)和/或下部覆盖层(2)一起施加在模具(6,8)中,在下部(5)和上部模具表面(9)之间, 其中。 关闭模具(6,8),并使可固化的可发泡组合物(7)在模具中发泡以产生填充开孔泡沫体的空隙的另外的泡沫。 为了能够使用较少的可发泡组合物(7)以填充开孔泡沫的空隙,将芯层(1)铺设在下模具表面(5)上,将可发泡组合物(7)喷涂到 芯层(1)位于下模具表面上,使得可发泡组合物(7)可以至少部分地通过重力穿透到开孔泡沫芯层(1)中。 此外,当到达芯层(1)时,可发泡组合物(7)具有在1 / s的剪切速率下测得的低于1000mPa·s的动态粘度。
    • 10. 发明授权
    • Foam rigidizing process and products produced therewith
    • US4548861A
    • 1985-10-22
    • US537728
    • 1983-09-29
    • John M. BarnesRobert G. HaleyGeorge E. Trepus, Jr.
    • John M. BarnesRobert G. HaleyGeorge E. Trepus, Jr.
    • B29C44/56C08J9/42C08G18/14B32B3/26B32B5/18
    • B29C44/5618C08J9/42C08J2205/05C08J2475/00Y10T428/24996Y10T428/249986Y10T428/249994Y10T428/249999
    • A composite, rigid, structural, foam panel (11) comprising: (i) a flexible, non-structural, open cell reticulated or semi-reticulated, foam sheet (10); and (ii), an essentially closed cell resinous foam formed from a flowable, foamable material (12); and, wherein the open cell non-structural foam sheet (10) and the essentially closed cell foam are each coextensive with the volume of spaced defined by the panel (11). In a preferred embodiment of the invention, the flexible, non-structural, open cell reticulated or semi-reticulated foam sheet (10) comprises an electromagnetic wave absorber and, consequently, the essentially closed cell rigid structural panel (11) produced comprises a rigid, structural electromagnetic wave absorber. The rigid panels and/or absorbers (11) of the present invention are preferably formed of urethane-like materials and in a process embodying the invention wherein: a flowable, foamable, resinous material (12) composed of Components "A" and "B" and a suitable cream are proportioned to form a panel (11) of the desired shape; the Components are thoroughly stirred, and introduced into the bottom of a preheated, vented mold (15) having suitable vents (19); the open cell flexible foam sheet (10), precut to the desired size, is inserted into the mold (15) on top of the flowable, foamable, resinous material (12); the lid (18) of the mold (15) is closed and clamped in place; and, the reactive Components "A" and "B" are allowed to foam and expand in an exothermic reaction, whereby the expanding material (12) is forced into, entirely through, and entirely throughout the open cell foam sheet (10) with excess material (12) escaping from the mold (15) through the vents (19). After curing at room temperature for at least two hours, the panel (11) is demolded and trimmed as required.