公开(公告)号：WO1995010366A1

公开(公告)日：1995-04-20

申请号：PCT/US1994006256

申请日：1994-06-03

Applicant: INSTITUTE OF PAPER SCIENCE AND TECHNOLOGY, INC.

Inventor： INSTITUTE OF PAPER SCIENCE AND TECHNOLOGY, INC. ,  AIDUN, Cyrus, K.

IPC: B05C05/02

CPC classification number: D21H23/36 ,  B05C3/18

Abstract: A coating applicator for coating a web or flexible substrate contains a walled application chamber where the coating liquid first comes into contact with the substrate (53). The coating liquid enters a channel of the application chamber (51) at the upstream side and wets the substrate as it flows in the same direction as the substrate. A doctor element (55) is positioned at the downstream side of the channel where the excess coating in the channel follows the contour of the boundary formed by the doctor element and leaves the channel. One of the applicator walls is designed to be a floating or moving wall or belt. The floating applicator wall and geometry of the streamlined boundaries of the coating device eliminates the formation of recirculating eddies or vortices. The elimination of vortices eliminates flow instability due to centrifugal forces and removes harmful pressure fluctuations which could result in coat-weight nonuniformities.

Abstract translation: 用于涂布网状物或柔性基材的涂布涂布器包含壁涂布室，涂覆液体首先与基材（53）接触。 涂布液在上游侧进入施加室（51）的通道，并在与基板相同的方向流动时润湿基板。 刮刀元件（55）位于通道的下游侧，其中通道中的多余涂层遵循由刮刀元件形成的边界的轮廓并离开通道。 涂抹器壁之一被设计为浮动或移动的墙壁或皮带。 浮动涂抹器壁和涂层装置的流线型边界的几何形状消除了循环涡流或涡流的形成。 消除涡流消除了由于离心力引起的流动不稳定性，并消除了可能导致涂层重量不均匀性的有害的压力波动。

公开(公告)号：EP0918571A1

公开(公告)日：1999-06-02

申请号：EP97935240.0

申请日：1997-07-31

Applicant: Institute of Paper Science and Technology, Inc.

Inventor： AIDUN, Cyrus, K.

IPC: B05C3 ,  B05C5 ,  B05C11 ,  B05D1 ,  D21H23

CPC classification number: D21H23/36 ,  B05C5/0254 ,  B05D1/28

Abstract: Coating devices for application of coating material to the surface of a web or a flexible substrate (18) wherein the coater may be modified to provide an air layer between the coating liquid and any lower boundary. The coater devices of the described embodiments provide two inlet channels and an outlet channel (26). The first inlet channel (12) carries the coating liquid, and the second channel (20) can be used to pump the carrier fluid such as air into the coating head to pressurize the chamber (16) and to keep the contact wetting line at the upstream section attached to the substrate. The air layer serves as a carrier fluid removing the wall shear stress on the coating liquid in the channel, and thus the coating flow for the operation of the device may proceed without flow separation from the wall at relatively low flow rates.