GRAVURE ROLL COATING OF NEWTONIAN LIQUIDS

被引：15

作者：

PATEL, R ^{[1
]}

BENKREIRA, H ^{[1
]}

机构：

[1] UNIV BRADFORD,DEPT CHEM ENGN,BRADFORD BD7 1DP,W YORKSHIRE,ENGLAND

来源：

CHEMICAL ENGINEERING SCIENCE | 1991年 / 46卷 / 03期

关键词：

D O I：

10.1016/0009-2509(91)80181-W

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

An experimental investigation of the flexible blade/gravure roll coating operation is presented for a wide range of operating conditions. The film thickness is measured with an infrared guage and the data reveal two regions of constant film thickness. At low capillary number (Ca < 0.3), the film thickness increases with increasing roller roughness defined as cell volume per unit area. At capillary number > 7.0, the film thickness is essentially independent of roughness. In all cases a decrease is observed with increasing slot gap. This, a priori, unexpected result is explained with reference to the flow beneath the blade which is circulatory at large gaps and linear at low gaps.

引用

页码：751 / 756

页数：6