RU2048210C1 - Device for impregnating roll material - Google Patents

Abstract

FIELD: treating roll material. SUBSTANCE: device is provided with the top and bottom cloth defining the impregnating layer. The cloths are spaced from each other along the trajectory of moving the roll material. The wringing unit is made up as a roller secured above the changing roller and the top and bottom doctor blades mounted to permit control of the space between them. EFFECT: enhanced efficiency. 1 dwg

Description

 The invention relates to equipment for liquid processing and impregnation of coiled material by immersion in an impregnating liquid and can be used mainly in the manufacture of asymmetric semipermeable membranes.

A device for impregnating a moving tape containing an impregnating bath with a binder and a transfer roll placed therein, an squeezing unit, a take-up reel [1]
A disadvantage of the known design is the unevenness in the thickness of the obtained material after polymerization of the binder. In the case of impregnation of the material with a binder to obtain a filter material, its throughput deteriorates, the time of productive work is reduced. Obtaining asymmetric semipermeable membranes on the specified device is impossible.

Closest to the technical nature of the invention is a device for impregnating a fabric, comprising a bath with an impregnating liquid and a transfer roll placed therein, an squeezing unit, a take-up reel [2]
A disadvantage of the known device is the unevenness in the thickness of the impregnated web. This occurs due to the accumulation of impregnation fluid on the squeeze rolls and the formation of smudges on the fabric. As a result, in the manufacture, for example, of a filter material reinforced with fabric during the polymerization of an impregnating liquid, different conditions are created for the formation of pores in the bulk of the web. In thicker areas, the number of pores, and hence the septa, is greater than in areas of thinner ones. Therefore, the finished filter material does not have a uniform flow area and the duration of productive work.

 In addition, on the known device it is impossible to obtain asymmetric membranes. Asymmetric membranes are characterized by different pore sizes in thickness, while a thick large-pore layer is covered with a thin microporous working layer.

 Redistribution of thickness in the manufacture of membranes on a known device does not occur.

 The problem to which the invention is directed, is to ensure uniformity in thickness over the entire area of the impregnated reinforced fabric, as well as providing the possibility of obtaining asymmetric semi-permeable membranes with a thin dense surface working layer.

 The essence of the invention lies in the fact that the device for impregnation of rolled material, mainly in the manufacture of semipermeable membranes, containing a bath with an impregnating liquid and a transfer roll placed in it, a squeezing unit, a take-up reel, according to the invention, is equipped with upper and lower impregnating layer-forming webs placed distantly relative to each other along the trajectory of movement of the rolled material, while the squeezing unit is made in the form of a roller mounted above the transfer roll, as well as Upper and lower squeegees installed with a calibrating gap adjustable between them.

 Carrying out the formation of an impregnating liquid between two sheets allows you to get asymmetric membranes with a dense working layer thickness of up to 1 micron.

 Introduction to the device of the upper and lower forming webs together with the proposed design of the squeezing unit provides a uniform material calibrated by thickness.

 In addition, the presence in the proposed device forming webs allows you to get unreinforced tape asymmetric membranes. This is ensured by the operation of the device without impregnated fabric.

 The invention is illustrated in the drawing, which shows a diagram of a device for the impregnation of roll material.

 The device comprises a bath 1 with an impregnating liquid 2. In the bath 1 there is a transfer roll 3, over which a roller 4 of the squeezing unit is fixed, which also includes the upper 5 and lower squeegees. The lower squeegee 6 is fixed motionless, and the upper squeegee 5 is installed using the adjusting mechanism 7 with the possibility of changing the calibration gap between them.

 The device is equipped with upper and lower forming blades 8, 9, the path of movement of which runs from the respective feed bobbins 10 through the tension equalizers 11 and then S-shaped under the transfer roller 3 to the roller 4 of the squeezing unit, and then through the gap between the squeegees 5, 6 to the receiving reel 12. Between the webs 8, 9 fill the impregnated material 13.

 The device operates as follows.

 The rolls of the forming webs 8, 9 are installed on the extreme feed reels 10, and the material 13 intended for impregnation is placed on the middle one. Fold all the sheets 8, 13, 9 together and direct them along the trajectory of movement through the bath 1, the transfer roll 3, the squeezing unit to the take-up reel 12. Using the adjusting mechanism 7, raising (lowering) the racket 5, set the necessary clearance. Passing through the bath 1, the impregnated material 13 is wetted by the impregnating liquid 2. The canvases from the bath 1 pass onto the roller 4, where, due to the tension, the excess part of the impregnation is preliminarily squeezed out. After the roller 4, the webs are fed to the squeegees 5, 6, which remove the impregnating liquid 2 from the forming webs 8, 9 and, compressing, calibrate the thickness of the canvas. Then, a sandwich from canvases 8, 13, 9 is exposed to initiating polymerization by irradiation (not shown in the drawing), and after polymerization they are wound on a take-up reel 12.

 By stretching the forming webs 8, 9 without the impregnated fabric, an unreinforced membrane with a dense surface layer with a thickness of about 1 μm and a large-pore base is obtained.

Claims (1)

 DEVICE FOR IMPREGNATION OF ROLL MATERIAL mainly in the manufacture of semipermeable membranes, containing a bath with an impregnating liquid with a transfer roll placed in it, a squeezing unit, a take-up reel, characterized in that it is provided with upper and lower impregnating layer-forming webs placed distantly relative to each other along the path moving the roll material, while the squeezing unit is made in the form of a roller mounted above the transfer roll, as well as the upper and lower squeegees, with an adjustable gap therebetween caliber.

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