Unlock instant, AI-driven research and patent intelligence for your innovation.

Curtain coating method and curtain coating apparatus

A curtain coating and curtain technology, which is applied to the surface coating liquid device, coating, etc., can solve the problems of undisclosed curtain edge rail coating liquid residue and auxiliary liquid removal

Active Publication Date: 2013-03-27
RICOH KK
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the coating liquid is allowed to fall freely and the formed curtain liquid film is brought into contact with a continuously running web to form a coating film on the web, it has a disadvantage that the amount of the attached coating liquid is relatively large. becomes larger at the edge of the coating film in the width direction
However, none of these patents (JP-A No. 11-188299 and JP-A No. 2001-46939) discloses the removal of the coating liquid residue and the auxiliary liquid at the bottom of the curtain edge rail

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Curtain coating method and curtain coating apparatus
  • Curtain coating method and curtain coating apparatus
  • Curtain coating method and curtain coating apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0206] in figure 2 The bottom of the curtain guide rail of the sliding curtain coating device shown in is installed in a rotatable manner Figure 10A with 10B The disc-shaped claw 102 is shown in, while the mandrel is fixed at the center of the claw. Then, the thermal recording layer coating liquid prepared according to the following formula was applied to the top of the web (paper), the coating speed was 400m / min, the coating width was 250mm and the flow rate of the coating liquid (from the nozzle slit Spray) is 3,000 g / min. At this time, the disc-shaped claws are made of stainless steel and have a radius of 20 mm and a thickness of 0.18 mm. The amount of auxiliary liquid (water) flowing along the curtain rail is 30 cc / min, and is used to recover the auxiliary liquid. The suction pressure of the vacuum unit is -8kpa. Likewise, the claw portion 102 is manufactured to protrude 2 mm from the curtain liquid film contact surface of the porous member 13 (which is made of ceramic a...

Embodiment 2

[0215] Except that the radius of the disc-shaped claw portion 102 was changed from 20 mm to 5 mm, the thermosensitive recording layer coating liquid was applied to the coil in the same manner as in Example 1. The results are shown in Table 1-A.

Embodiment 3

[0217] In addition to using Figure 5A to 5C The sliding curtain coating device shown in-in which a flat plate-shaped claw 101 (which is made of stainless steel and has a thickness of 0.18mm, a length of 60mm with respect to its moving direction and a width of 30mm) is clamped in the drive Between the rubber rollers 14 and configured to move back and forth (at a rate of 0.005 m / sec)—except, the thermosensitive recording layer coating liquid was applied to the coil in the same manner as in Example 1. The results are shown in Table 1-A.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a curtain coating apparatus including: a slit from which at least one layer of a coating liquid is ejected; a curtain edge guide configured to guide the ejected coating liquid in the form of a curtain liquid film and make the coating liquid fall freely, while pouring an auxiliary liquid from the whole of a surface provided in contact with the coating liquid in the curtain edge guide, so as to apply the coating liquid onto a continuously running web; and a claw which supports the curtain liquid film at a bottom of the curtain edge guide, wherein when a residue of the liquid is left on the claw, the claw is configured to move.

Description

technical field [0001] The present invention relates to a curtain coating method and a curtain coating device, in particular to a curtain coating method and a curtain coating device in which at least one layer of coating liquid is ejected from a slit, and is sprayed by using The sprayed coating liquid falls freely by the curtain edge guide rail, which guides the coating liquid in the form of a curtain liquid film, so that the coating liquid is applied to the continuously running web. Background technique [0002] The curtain coating method is a coating method commonly used in the production of photosensitive materials and the like such as films. In the curtain coating method, for example, there is a method that includes spraying a coating liquid from a nozzle slit of a curtain coating head 1, and freeing the sprayed coating liquid by using a curtain edge guide 2. Falling, the curtain edge guide guides the coating liquid in the form of a curtain liquid film, thereby forming ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B05C5/00B05C11/00B05C11/10B05D1/30
CPCB05C5/008B05C5/005
Inventor 小堀英之花井修司清水智仁长泽信幸原哲也
Owner RICOH KK