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    Drying process
    1.
    发明授权
    Drying process 失效
    干燥过程

    公开(公告)号：US4872270A

    公开(公告)日：1989-10-10

    申请号：US166083

    申请日：1988-03-09

    申请人： Dennis R. Fronheiser ,  Jack Hayward ,  Gerald G. Reafler ,  James R. Schuler

    发明人： Dennis R. Fronheiser ,  Jack Hayward ,  Gerald G. Reafler ,  James R. Schuler

    IPC分类号： B05D3/02 ,  B05D3/04 ,  B05D7/04 ,  B05D7/24 ,  F26B3/00 ,  F26B13/10 ,  F26B21/06

    CPC分类号： F26B21/06 ,  F26B13/101 ,  F26B3/00

    摘要： A latex paint containing water and one or more higher boiling organic solvents is coated on a carrier film and dried by a process which yields a dried paint layer free of bubble defects. The film is passed continuously through a series of at least three drying stages in contact with warm, moderately humid air and more than half of the heat required for evaporation is supplied to the underside of the film. Drying conditions in at least each of the first three stages are controlled to maintain a film temperature profile which causes the water to evaporate at a moderate rate but more rapidly than the organic solvents, thus achieving coalescence of the paint and avoiding the trapping of liquids in a surface-hardened paint layer.

    摘要翻译： 将含有水和一种或多种较高沸点有机溶剂的乳胶漆涂覆在载体膜上并通过产生无气泡缺陷的干燥漆层的方法进行干燥。 该薄膜连续通过一系列至少三个与温暖，中等湿度的空气接触的干燥阶段，并且蒸发所需的热量的一半以上被供应到薄膜的下侧。 控制至少前三个阶段的干燥条件以保持膜温度分布，这导致水以适当的速率蒸发，但是比有机溶剂更快地蒸发，从而实现油漆的聚结并避免液体的捕获 表面硬化漆层。

    Apparatus and method for cocasting film layers
    4.
    发明授权
    Apparatus and method for cocasting film layers 失效
    用于合并膜层的装置和方法

    公开(公告)号：US5256357A

    公开(公告)日：1993-10-26

    申请号：US890507

    申请日：1992-05-28

    申请人： Jack Hayward

    发明人： Jack Hayward

    IPC分类号： B29C47/04 ,  B29C47/06 ,  B29C47/30 ,  B29C47/70 ,  B29L7/00 ,  B29L9/00

    CPC分类号： B29C47/145 ,  B29C47/0019 ,  B29C47/0021 ,  B29C47/065 ,  B29L2007/008 ,  B29L2009/00

    摘要： Polymeric films of two or more layers are cocast on a moving substrate from a die having extrusion slots which extend to parallel slot exits spaced close to the substrate. An upstream slot exit has outer and inner lips formed by coplanar lands. The outer upstream land extends to a pinning line formed by the intersection with an outer surface of the die. A downstream slot exit also has lips formed by planar lands and the outer land of the downstream slot exit is spaced a greater distance from the substrate than the other lands. Films with a plurality of uniform layers of different thicknesses are cocast from dopes of different viscosities.