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Web manufacturing method, charge control method, and charge control device

A manufacturing method and electrification control technology, which can be applied to devices for coating liquid on surfaces, winding strips, static electricity, etc., and can solve the problems of inability to configure the eliminator, inability to set the eliminator, and low electrification potential.

Inactive Publication Date: 2020-08-07
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of using static eliminators, a space for installing static eliminators is required, and it may not be possible to install static eliminators due to the structure around the conveyor roller.
Since ions are generated by discharge in the eliminator, it is not possible to configure the eliminator in an environment that requires explosion protection
In addition, when the conveying speed of the coil is high or the distance from the roll peeling point to the static eliminator is large, the static elimination capacity may not be sufficient to perform sufficient static elimination.
In addition, since the conveying roller is usually made of metal and has conductivity, the ions used for static elimination are absorbed by the conveying roller, and the static eliminating ability decreases.
When the surface of the coil is not uniformly charged but is charged in spots, it may not be possible to remove the static electricity sufficiently due to the remarkable low charging potential.

Method used

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  • Web manufacturing method, charge control method, and charge control device
  • Web manufacturing method, charge control method, and charge control device
  • Web manufacturing method, charge control method, and charge control device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] to assemble figure 1 device shown. Here, a soft polyethylene sheet (manufactured by Kokugo Co., Ltd.) with a thickness of 30 μm was used as the coil 10 , and a metal roller with a diameter of 150 mm and whose surface was hard chrome-plated was used as the transport roller 20 . A two-fluid nozzle (model number: SCBIMV80005S) manufactured by Ikeuchi Co., Ltd. was used as the spray nozzle 30 which is a sprayer. By using tap water as the liquid b for charge control, and supplying the tap water and air a to the spray nozzle 30 , water can be sprayed on the transport roller 20 . The conveying roller 20 was rotated and the web 10 was conveyed at a speed of 30 m / min. Then, the surface potential of the web 10 was measured by the potentiometer 50 provided on the downstream side of the transport roller 20 while changing the presence or absence of water spray and the flow rate of the water spray. The results are shown in Table 1.

[0046] As can be seen from Table 1, when water...

Embodiment 2

[0050] The same procedure as in Example 1 was performed except that a glass cover roller was used as the transport roller 20 and 1,2,4-trichlorobenzene was used as the liquid b for charge control. The results are shown in Table 2. As can be seen from Table 2, when the liquid is not sprayed, the surface potential of the coil 10 is negative at approximately -9 kV, but when the liquid is sprayed, the surface potential changes to a positive direction. When the spray flow rate of the liquid is set at 10 mL / min, the surface potential shifts to the positive side and becomes about -5 kV, and when the spray flow rate is set at 15 mL / min, the surface potential becomes almost 0 kV. That is, by setting the spray flow rate of the liquid to 14 mL / min to 16 mL / min, frictional electrification of the coil 10 can be prevented. If the spray flow rate is further increased to 20 mL / min, the surface potential can be shifted to +8 kV. It can be seen that even when the web 10 is negatively charged ...

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Abstract

The purpose of the present invention is to manufacture a charge amount-controlled web without providing the web, such as an elongated polymer film, with an advance charge. Provided is a web manufacturing method comprising a transfer step of transferring a web, wherein a liquid is supplied to the interface of a transfer roll transferring the web and the web, and a charge amount on a surface of theweb due to frictional charging between the transfer roll and the web is controlled. The liquid includes, for example, a liquid that produces, between the transfer roll and the web, a frictional chargeof the opposite polarity from the charge polarity produced on the surface of the web due to frictional charge between the transfer roll and the web.

Description

technical field [0001] The present invention relates to a method of manufacturing a coil capable of controlling the charge amount, a charge control method for controlling the charge amount of the coil, and a charge control device. Background technique [0002] Normally, static electricity is generated when two substances rub against each other, one of the two substances is relatively positively charged, and the other is negatively charged. When a substance is rubbed against another substance, the tendency to be positively charged or negatively charged is generally known as the charge sequence of each substance. By referring to the charge sequence, it can be estimated that when frictional electrification occurs between any two substances Which is positively charged. An example of the charging sequence is shown in Non-Patent Document 1. [0003] For example, when conveying a coil such as a long polymer film, the coil is moved by being supported by a conveying roller and rota...

Claims

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Application Information

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IPC IPC(8): H05F1/00B05D1/02B05D5/00B05D7/00B65H20/02H05F1/02
CPCB05D1/02B65H20/02H05F1/00H05F1/02B05D1/28B05D3/144B05D7/04B05D2252/02B65H2301/5114B65H2301/5132B65H2701/1714B65H2701/1752
Inventor 奥野将人渡边充
Owner TORAY IND INC
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