JPS60202049A - Liquid jet type sealing device - Google Patents

Abstract

PURPOSE:To provide sealing without damaging a web by providing a liquid vessel in an intermediate part between high and low pressure parts and a liquid jet part connected to said liquid vessel, when introducing a web continuously through a narrow space from said high pressure part to said low pressure part and vise versa. CONSTITUTION:A running web 21, which is being unwound from a raw fiber roll 11 and wound up to a semi-finished product roll 20, is brought in contact with a high pressure gas in a high-pressure gas treating chamber 22, to undergo treatment for stabilization of demensions, heat resistance, humidity resistance, etc. A liquid vessel 28 is provided midway between the treating chamber 22 as a high pressure part and the ambient space as a low pressure part, and liquid jet passages 29, 29 which are connected to the vessel 28, are provided to obtain sealing for the high pressure gas. The liquid jet part 29 is formed in such a way that liquid from a liquid feed pipe 37 is jetted through slot parts 34, 34 against both front and back sides of the web which runs through slits holes 30, 31. Thereby, a high pressure gas can be prevented from leaking to the low pressure side.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to improvements in high-pressure gas treatment equipment for sea urchins, and more specifically, the present invention relates to the improvement of a sealing device force when subjecting a running web to continuous vacuum treatment or high-pressure gas treatment. Regarding improvements. [Prior Art] A sealing device for continuously guiding a web from a high-pressure section to a low-pressure section or from a low-pressure section to a high-pressure section through a narrow gap, wherein at least one surface of the gap is constituted by the cylindrical surface of a roller that conveys and supports the web. A so-called roller sealing device in which the web is conveyed through the gap while being supported by rollers t-q is disclosed in U.S. Patent No. 2. ri7
2.33Q issue, Tokukai Sho μta 7 Tata 7! Publication No. 4-442770, and Japanese Patent Publication No. 447-101
? knotweed! 2. Description of the Related Art Devices disclosed in Japanese Patent Publication No. That is, U.S. Patent Nos. 7, 330 and JP-A Akihiro? The roller type sealing device shown in Fig. 1 is used in Japanese Patent Publication No. 7 Tata 7; the roller type sealing device shown in Fig. 3 is used in Japanese Patent Publication μt-μλ770;
The rμj publication discloses a roller type sealing device shown in FIG. In FIG. 1, a web 1 is wound around a roller and guided through a very narrow gap 3 from atmospheric pressure to a vacuum section. However, with this method, there is a lot of gas leakage from the gap 3 (and it is extremely difficult to control the pressure and gas components in the vacuum processing chamber. As shown in Fig. 1, it was necessary to connect the roller type sealing device shown in Fig. 1 in multiple stages, and the gas leaking from each sealing device was evacuated using a large capacity exhaust pump.In addition, in order to reduce such gas leakage, A device in which a recess is provided in the gap 3 as shown in FIG. It is difficult to significantly reduce this, and a multi-stage roller type sealing device as shown in Fig. 2 has been commonly used.Such a conventional multi-stage roller type sealing device has high production and running costs. The preparatory work for passing the leading end of the web through a large number of roller seals is extremely difficult and requires a great deal of effort and time. If the KU is not able to be maintained and a speed difference occurs, slippage occurs due to slippage between the web and the roller, which impairs the quality of the product.Furthermore, in conventional roller sealing devices, When the gas passing through the seal gap 3 rapidly expands near the exit of the seal gap, the impact of the high-speed airflow causes the web to flutter, causing scratches and tears, and damaging the chemicals. For this reason, conventional roller sealing devices were difficult to apply to resin films and paper where large tensions cannot be applied, as it is common practice to apply large tension to the web to hold down the patch. The first object of the present invention is to provide a sealing device that causes less gas leakage and does not require a multi-stage structure.The second object is to provide a sealing device that does not cause flapping even when a large tension is applied to the web. Therefore, it is an object of the present invention to provide a sealing device that does not cause damage to the web. [Structure and operation of the invention] The above-mentioned object of the present invention is to provide a sealing device that does not cause damage to the web. This is achieved by a liquid jet type sealing device characterized by having a liquid jet part communicating with the liquid tank.The contents of the present invention will be explained in more detail below with reference to the drawings of the embodiments.In Fig. 3, The running web 21 is unwound from the raw roll 11, passed through all the pass rollers 12, 13, 14, 15, 16, 17, 18, and 19, and then wound onto the semi-finished product roll 20. By contacting high-pressure gas such as gas, ethylene oxide gas, or water vapor,
Processes such as dimensional stabilization, moisture resistance, heat resistance, and 1st shift are applied continuously. The above-mentioned high-pressure gas is supplied to the high-pressure gas processing chamber 22 through the air supply valve 23 and the air supply pipe 24 by a blower (not shown), is partially liquefied, and is discharged through the discharge pipe 26 and the discharge pallet 27. Therefore, in this embodiment, the high-pressure gas treatment chamber 22 becomes a high-pressure part, and the surrounding space becomes a low-pressure part. A liquid tank 2B is arranged between the high-pressure gas processing chamber 22 as a high-pressure part and the surrounding space as a low-pressure part, and the liquid tank 28
By providing the liquid jet portions 29 and 29t in communication with the high-pressure gas, sealing of the high-pressure gas can be efficiently and reliably realized. The liquid jet part 29 has a slit hole 30.3 as shown in FIG.
When the web 21 runs through the web 21, the liquid is supplied from both the front and back sides through the liquid supply pipes 32 and 33 and then in the form of a film-like jet through the slot portions (44 and 35 in Fig. 5). There is. The liquid flows through the slit holes 31 and 31 into the liquid tank 2.
8, flows from the discharge port 34 through the piping 35, and is refluxed via the main liquid supply pipe 37 by the pressurizing pump 36 (FIG. 5). The liquid used in the jet sealing device of the present invention includes liquefied gases and gases used in high-pressure gas treatment, such as liquid chlorine, liquefied ethylene oxide, water, and alcohol. In order to make these liquids that have passed through the liquid supply Ir32 and 33 into a uniform film-like jet flow in the width direction at the slot portions 34 and 35, the length of the slot portion must be sufficient or the planar shape of the slot portion must be Design considerations need to be made depending on the width of the web, such as making it wider at the end or providing a liquid reservoir in some cases. In the embodiments shown in FIGS. 3 and 6, the gap between the slot portions 34-36 is approximately 01j-2,0mm,
The forming angle θf between the web traveling direction and the slot portion is 130 degrees to 0 degrees, the interval between the slit holes 30 and 31 is θ to 2 mm relative to the web thickness, and the liquid supply pressure of the pump 36 is θ relative to the high pressure gas supply pressure. . 0j - Set it as high as 0.20Ky/cm2 to increase the height of the air-liquid interface from the slot partial flow point to hiJOcm or j
The airtightness of the seal can be improved by adjusting the operating conditions so that the temperature is Ocm. Moreover, according to such condition settings, since the load becomes high, even if the liquid supplied from the pump 36 branches into the correct liquid supply pipe, the pump 36 operates stably without causing imbalance. The web used in the present invention includes paper, puller-++
+□Lisnack film, metal, resin coated paper, synthetic paper, etc. are included. Examples of objects to be subjected to high-pressure gas treatment include artificial skin webs, cellulose acetate webs for membrane filters, and medical webs that require sea urchin spot killing treatment. Examples of the material of the plastic film include polyolefins such as polyethylene and polypropylene, vinyl polymers such as polyvinyl acetate, polyvinyl chloride, and polystyrene;
t, 6-nylon, 2-night, polyethylene-2,6
- Polyesters such as naphthalates, polycarbonates,
Cellulose acetates such as cellulose triacetate and cellulose diacetate are used. Further, the resin used for resin coachitic paper is typically polyolefin, including polyethylene, but is not necessarily limited thereto. Further, as the metal web, for example, there is an aluminum web. [Effects of the Invention J The liquid jet sealing device according to the present invention having the above-described configuration and operation has the following effects. (1) Pressurized liquid seals high pressure gas at the web entrance/exit. Therefore, since there is no leakage of high-pressure gas, there is no wasted gas loss (which is economical).In terms of equipment, the feeding and winding sections can be installed outside the gas chamber, resulting in low-cost equipment. (1:) Since there is no discharge of high-pressure gas such as saturated steam or sterilizing gas, feeding and winding operations are easy.
Very good working environment. 011) High-pressure liquid supplied from the slot portion exists on both sides of the web and serves as lubrication and protection, so that the inner wall surface of the slit hole and the high-pressure liquid confluence portion nib are not rubbed. Therefore, since the surface of the web is not damaged, an intact web can be transported into the processing chamber, and the web can be taken out from the chamber with the heat-treated layer and the processed web intact in the chamber. Therefore, there are no scratches or malfunctions, and stable continuous production is possible. In order to further clarify the effects of the present invention, example data will be introduced below.・ [Example] The structure is as shown in the figure, and the spacing between the slit holes is 2°23m.
The liquid jet part was entirely made of stainless steel (SUSj/, 4), with a width of 3 AO mm, a gap of 1 mm between the slot parts, and an angle θ between the web traveling direction and the slot parts of ≠j degrees. In the embodiment shown in FIG. 5, a cellulose acetate film for a membrane filter with a medium size of 3≠Omm and a thickness of 0.2jrnm is run at a speed of 10m/min, and is subjected to high-pressure steam treatment at /, uKy /0m2 in a high-pressure gas treatment chamber. Figure 7 is a graph showing the liquid supply pressure of the liquid supply pump on the horizontal axis and the amount of steam leakage on the vertical axis when water is used as the liquid. When , the height h of the gas-liquid interface from the slot partial flow point became ≠ocm, and airtightness could be maintained sufficiently. Further, at this time, the running of the web was stable, and there were no scratches on the web.

[Brief explanation of the drawing]

1 to 1 are diagrams showing the structure of a conventional sealing device, and FIG. 5 is a diagram showing an outline of a web processing device using a liquid jet type sealing device according to the present invention. Fig. 7 is a perspective view showing an embodiment of the liquid jet section of the liquid jet type sealing device according to the present invention, and Fig. 7 is a graph showing the results of the example. 1.21 Song... Web 22... High pressure gas processing chamber 28...・・・・・・
...Liquid tank 29 ......Liquid jet section Patent applicant: Fuji Photo Film, iIG Co., Ltd.
Figure 7: Stab pressure (kg/c♂) Voluntary procedure amendment book Showa! 2nd year iKaS, Mr. N. Japan Patent Office Commissioner 1, Incident Display Showa! 2nd year special application number! 1?072 No. 2
, Title of the invention Liquid jet sealing device 3, Relationship with the case of the person making the amendment Patent applicant 4, Subject of the amendment Column 5 of "Detailed Description of the Invention" of the specification, Contents of the amendment (1) Specification No. Page 6, lines 16 to 17 “O1
"About 2.0u" is corrected to "more than twice the distance between the slit holes 30 and 31." (2) Page 2 of the specification, line 12 to line 1, ``The spacing between the slit holes is 2.-2t1m, width 36own, gap/ml of the slot section'' is ``The spacing between the slit holes is /8111, width 340M, slot The gap between the parts is 2.25 groups.''

Claims (1)

[Claims] In a sealing device for continuously guiding a web from a high-pressure part to a low-pressure part or from a low-pressure part to a high-pressure part through a narrow gap, a liquid tank is arranged between the high-pressure part and the low-pressure part,
A liquid jet type sealing device characterized in that a liquid jet part is provided which communicates with the liquid tank.