JP2000210607A - Direct fountain(df) coater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the adverse effect on coating by entrained air by thoroughly cutting off the entrained air generated on the surface of base paper. SOLUTION: A DF coater is for applying a coating film 5a on the surface of the base paper 6 by making a coating liquid 5 to continuously flow down on the base paper 6 in a film from the upper side of the tape like base paper 6 moving almost horizontally and a wind shielding blade 10 for cutting off the entrained air stream 8 generated on the base paper 6 is arranged at the upstream side of an area 9 to be coated on the coating film 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DF coater (Direct-Fountain-Coater) for continuously producing processed paper or the like in which a pressure-sensitive paint or the like is directly applied to the surface of a tape-shaped base paper. It is.

[0002]

2. Description of the Related Art Conventionally, processed paper such as pressure-sensitive paper is manufactured by a DF coater.

FIG. 3 is a side view of a DF coater apparatus. In the drawing, reference numeral 1 denotes a payout roll around which a tape-shaped base paper 6 is wound. Reference numeral 2 denotes a take-up roll that takes up the base paper 6. Reference numerals 3 and 3 denote a pair of guide rollers for guiding the space between the feeding roll 1 and the winding roll 2 substantially horizontally. Reference numeral 4 denotes a header provided between the guide rollers 3 and 3. Reference numeral 5 denotes a coating liquid such as a pressure-sensitive coating liquid which continuously flows down from the header 4 to the upper surface of the base paper 6 in the form of a film. Reference numeral 5a denotes a coating film in which the coating liquid 5 is applied to the upper surface of the base paper 6. Reference numeral 7 denotes a fixing unit such as a heater provided on the downstream side of the header 4.
Reference numeral 8 denotes an entrained airflow generated on the surface of the base paper 6 as the base paper 6 is transported. The base paper 6 may be conveyed at a high speed of about 1,000 m / min in order to increase the production efficiency of the processed paper.

[0004]

However, the above D
Since the F coater apparatus conveys the base paper at a high speed of about 1,000 m / min, an entrained airflow that flows toward the downstream side is generated on the surface of the base paper. As a result, there is a problem that the paint film is greatly disturbed by the entrained air flow, so that good coating cannot be performed and the quality of the processed paper is deteriorated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is intended to surely shut off the entrained air flow generated on the surface of the base paper so that the entrained air flow does not adversely affect the coating. It is an object of the present invention to provide a DF coater device as described above.

[0006]

According to the present invention, there is provided a DF for coating a coating film on the upper surface of a base paper by flowing a coating liquid continuously in a film form from above a tape-shaped base paper flowing substantially horizontally. A coater device, which is located upstream of a coating location of the paint film,
There is provided a DF coater device provided with a wind shield blade for blocking an entrained air flow generated on the surface of the base paper.

[0007] The wind shield blade is preferably made of stainless steel.

Next, the operation of the present invention will be described. By arranging the wind shield blade on the upstream side of the coating portion of the paint film as described above, the entrained air flow generated on the surface of the base paper is reliably blocked, so that the disturbance of the paint film is prevented. Therefore, it is possible to perform good coating with a uniform coating film thickness and to improve the quality of processed paper. Since the wind shield blade is made of stainless steel, wear can be reduced.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a side view of the DF coater device of the present invention. Note that members common to those shown in FIG. 3 as the prior art will be described using the same reference numerals. In the drawing, reference numeral 1 denotes a payout roll around which a tape-shaped base paper 6 is wound. Reference numeral 2 denotes a take-up roll that takes up the base paper 6. Reference numerals 3 and 3 denote a pair of guide rollers for guiding the space between the feeding roll 1 and the winding roll 2 substantially horizontally. Reference numeral 4 denotes a header provided between the guide rollers 3 and 3. Reference numeral 5 denotes a coating liquid such as a pressure-sensitive agent which continuously flows down from the header 4 to the upper surface of the base paper 6 in a film form. Reference numeral 7 denotes a fixing unit such as a heater provided on the downstream side of the header 4. Reference numeral 8 denotes an entrained airflow generated on the surface of the base paper 6 as the base paper 6 is transported. Reference numeral 9 denotes a coating portion of the coating film 5 flowing down on the upper surface of the base paper 6.

Reference numeral 10 denotes a windshield blade made of stainless steel disposed upstream of the coating location 9 to shut off the entrained airflow 8 generated when the base paper 6 is conveyed. It is preferable that the tip of the wind shield blade 10 is lightly abutted on the surface of the base paper 6 at a position of about 30 mm upstream of the coating location 9. The tip of the wind shield blade 10 is rounded so as not to damage the base paper 6.

Next, the operation of the present embodiment will be described. As described above, by bringing the tip of the wind shield blade 10 disposed on the upstream side of the coating location 9 of the paint film 5 into contact with the upper surface of the base paper 6, the entrained airflow 8 generated on the surface of the base paper 6 can be reliably prevented. , It is possible to prevent the paint film 5 from being disturbed. Therefore, it is possible to perform good coating with a uniform thickness of the paint film 5 and to improve the quality of processed paper. be able to. Since the wind shield blade 10 is made of stainless steel, wear can be reduced.

[0012]

Next, test results of the present invention will be described. FIG. 2 is a diagram showing “the effect of the air cut (wind shielding) conditions on the wind speed above the coating point (coating location)”. In the figure,
The vertical axis represents the wind speed (V, m / s), and the horizontal axis represents the upward distance from the base paper. In this test, the base paper speed: 1,0
The test was performed under the following conditions: 00 m / min, the distance from the windshield blade tip to the paint film: 30 mm, and no paint on the base paper surface.

In the figures, the symbol ○ indicates an example in which no windshield blade is provided, the symbol □ indicates an example in which the angle of the windshield blade is 25 °, the symbol ◇ indicates an example in which the angle of the windshield blade is 97 °, and the symbol × indicates an example. An example in which the angle of the wind shield blade is set to 97 ° and the gap between the tip of the wind shield blade and the base paper is set to 1 mm.
0 °, 1mm gap between windshield blade tip and base paper
(Calculated value) is shown.

From the test results, as shown by the symbols □, ◇, ×, and the dotted lines, the windshield blade 10 is disposed on the upstream side of the coating liquid 5 and the tip of the windshield blade 10 is attached to the base paper 6.
Or the end of the wind shield blade 10 is brought into contact with the base paper 6 so as to eliminate the gap, the angle of the wind shield blade 10 with respect to the base paper 6 does not matter so much.
It was confirmed that the entrained airflow 8 generated on the surface of the base paper 6 could be reliably shut off even if the paper was conveyed at a speed as high as 00 m / min, and the disturbance of the coating liquid 5 was prevented.

The present invention is not limited to the above-described embodiment. For example, a small gap may be provided between the tip of the wind shield blade and the upper surface of the base paper, and the scope of the present invention is not deviated. Of course, it can be variously changed.

[0016]

As described above, according to the present invention,
The wind shield blades arranged upstream of the coating location of the paint film ensured that the entrained airflow generated on the surface of the base paper was shut off, so that the paint film could be prevented from being disturbed. Excellent effects such as good coating with a uniform coating film thickness and improvement in the quality of processed paper can be achieved.

[Brief description of the drawings]

FIG. 1 is a side view of a DF coater device of the present invention.

FIG. 2 is a diagram illustrating an influence of an air cut (wind shielding) condition on a wind speed above a coating point.

FIG. 3 is a side view of a conventional DF coater device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 feeding roller 2 take-up roller 3 guide roller 4 header 5 coating liquid 5 a coating film 6 base paper 7 fixing unit 8 accompanying air flow 9 coating location 10 windshield blade

Continued on the front page (72) Inventor Hirofumi Morita 1 Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa Ishikawashima-Harima Heavy Industries, Ltd. Inside the Yokohama Engineering Center (72) Inventor Atsushi Hirata Shin-Nakahara-cho, Isogo-ku, Yokohama-shi, Kanagawa No. 1 Ishi Kawashima Harima Heavy Industries, Ltd. Technical Research Laboratory F-term (reference) 4F041 AA12 CA04 CA15 4F042 AA22 BA27 CB24 DD31

Claims (2)

[Claims] 1. A DF coater for coating a coating film on an upper surface of a base paper by flowing a coating liquid continuously from above a tape base paper flowing substantially horizontally in a film form. A DF coater characterized in that a wind shield blade for blocking an entrained air flow generated on the surface of the base paper is disposed upstream of a coating location. 2. The DF coater according to claim 1, wherein said wind shield blade is made of stainless steel.