JP2001194068A - Heater for thin film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heater capable of simply and efficiently heating or cooling a thin film. SOLUTION: The heater for a thin film is provided with a thin film feeder, a cylindrical body provided with a heater to transfer the thin film, and an auxiliary roll coming in conpact with the thin film of the cylindrical body. The gap size formed by the cylindrical body and the auxiliary roll varies in accordance with the thickness of the thin film.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating device and a cooling device for a thin film.

[0002]

2. Description of the Related Art A heating or cooling method using a cylindrical body (drum) is conventionally known, and an apparatus used for this method is commercially available as a drum dryer or a drum cooler. Used to configure. Among the thin films formed from the molten fluid of the resin, those with high tackiness are relatively easy to heat or cool with these commercially available devices, but those with low tackiness are
There is a problem in that heating or cooling becomes difficult because of poor winding around the cylindrical body and a significant decrease in thermal efficiency.

In order to solve this problem, Japanese Patent Publication No. 2-9273 discloses an apparatus in which an endless belt is provided on the outer periphery of a cylindrical body, and the object (thin film) is transferred while being pressed against the cylindrical body by the endless belt. It has been disclosed. This device is said to have high heating or cooling efficiency, but requires a follow-up mechanism for an endless belt, which makes the device more complicated and larger, resulting in significant cost increases. In addition, it was difficult to operate at high speed due to problems such as meandering of the endless belt.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide an apparatus capable of efficiently heating or cooling a thin film without requiring a complicated design change.

[0005]

SUMMARY OF THE INVENTION The present invention provides a thin film supply means, a cylindrical body provided with a heating means for running the thin film,
The present invention relates to an apparatus for heating a thin film, comprising an auxiliary roll in contact with a thin film on the cylindrical body, wherein a size of a gap formed by the cylindrical body and the auxiliary roll varies according to a change in thickness of the thin film.

The present invention also provides a thin film supply means, a cylindrical body provided with cooling means for running the thin film, and an auxiliary roll in contact with the thin film on the cylindrical body. The present invention relates to a thin-film cooling device in which the size of a gap formed by an auxiliary roll varies according to a variation in the thickness of the thin film.

[0007] Further, the present invention provides a method in which a thin film is caused to run on the surface of a heated cylindrical body, and the thin film is formed by an auxiliary roll in which the size of the gap between the thin film and the cylindrical body changes according to the change in the thickness of the thin film. The present invention relates to a method of heating the thin film by pressing the thin film on the surface of the cylindrical body.

Further, according to the present invention, the thin film is run on the surface of the cooled cylindrical body, and the thin film is formed by an auxiliary roll in which the size of the gap between the thin film and the cylindrical body changes according to the change in the thickness of the thin film. The present invention relates to a method for cooling the thin film by pressing the film on the surface of a cylindrical body.

The device of the present invention has relative adhesiveness to a cylindrical body, and does not adhere to the cylindrical body as it is, but is suitably used for a thin film that adheres to the cylindrical body when pressure is applied. In addition, the method of the present invention has relative tackiness to the cylinder, and does not adhere to the cylinder as it is,
It is suitably used for a thin film that adheres to a cylindrical body when pressure is applied.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A main part of the apparatus according to the present invention will be described with reference to the drawings.

The apparatus of FIG. 1 (a) runs a thin film,
It has a rotatable cylinder 1 provided with a heating means or a cooling means (not shown), and an auxiliary roll 2 abutting on a thin film running on the surface of the cylinder 1. This auxiliary roll 2 is installed between the cylindrical body 1 and the support means 3. The auxiliary roll 2
Rotates due to friction with the thin film 4 as the cylindrical body 1 rotates. At this time, since the auxiliary roll 2 does not have a fixed shaft and is supported only at two points of the cylindrical body 1 and the support means 3,
It can be moved according to the change in the thickness of the thin film, and the size of the gap with the cylindrical body 1 can be changed. Also, the support means 3
Is preferably in contact with the auxiliary roll 2 at a line or at a plurality of points, and is preferably a rod or the like having little friction with the auxiliary roll 2, and more preferably fixed itself. Due to the movement of the auxiliary roll 2, the weight is more effectively transmitted to the thin film 4, and the adhesion of the thin film to the surface of the cylindrical body 1 is also increased. The pressure from the auxiliary roll 2 may be appropriately changed according to the physical properties of the thin film depending on its weight, diameter, installation position, and the like. The contact area with the cylinder 1 and the force of the vector component on the cylinder 1 can be calculated from the roll diameter and the roll position of the auxiliary roll 2. Also, the size and material of the cylindrical body 1 and the auxiliary roll 2 may be appropriately selected according to the thin film.

In the apparatus shown in FIG. 1 (b), the support means 3 '
It consists of a bearing penetrating the auxiliary roll 2 and a support rod extending from the end thereof. In this apparatus, an auxiliary roll 2 is brought into contact with a thin film on a cylindrical body 1 in a roller shape. In this device, the auxiliary roll 2 has a through hole for passing the bearing, but the diameter is formed larger than the diameter of the bearing so that play occurs around the bearing. Due to this configuration and the elasticity of the support rod, the auxiliary roll 2 can move in accordance with a change in the thickness of the thin film 4 as in the apparatus of FIG.

In the apparatus shown in FIG. 1C, an elastic member 6 (preferably a spring) is provided between the bearing 5 and the auxiliary roll 2. In this device, when the thin film is supplied to the cylindrical body 1, the auxiliary roll 2 moves according to the change in the thickness of the thin film due to the force of the elastic member 6, and the size of the gap with the cylindrical body 1 changes. The weakly adhesive thin film 4 is appropriately pressed against the cylindrical body 1. This device is preferable in that the auxiliary roll 2 can be installed at any position with respect to the cylindrical body 1, so that the degree of freedom in device design is increased and the crimping effect is improved. In addition,
In the apparatus of the present invention, two or more auxiliary rolls can be installed and multi-stage pressure bonding can be performed. In this case, each of the auxiliary rolls can use any of the methods shown in FIGS.

The auxiliary roll of the apparatus according to the present invention may be any other than the above, for example, as long as the size of the gap formed by the cylindrical body and the auxiliary roll can be changed according to the change in the thickness of the thin film. It may be installed in a form such as hanging from a wall.

In the conventional apparatus, the auxiliary roll is supported by a fixed shaft so that the size of the gap between the auxiliary roll and the cylindrical body is constant, and cannot cope with a change in the thickness of the thin film. Therefore, when the thickness of the thin film is larger than the size of the gap, there is a problem that the thin film becomes clogged or the thin film is rolled. There is a problem that the adhesiveness to the film decreases and the thermal efficiency decreases. On the other hand, in the apparatus of the present invention, the size of the gap formed by the cylindrical body and the auxiliary roll varies according to the variation in the thickness of the thin film. The thin film is appropriately pressed to the cylinder, and the thermal efficiency does not fluctuate.

In the apparatus of the present invention, the surface of the auxiliary roll is formed of a material to which the weakly adherent thin film does not adhere or hardly adheres, has a structure capable of reducing the adhesion, or has both of them. Is preferable in terms of thermal efficiency. For example, the surface may be processed with a fluororesin or a satin finish.

The thin film is made of a known conductive heating dryer,
For example, it can be manufactured by a drum dryer (available from Katsuragi Kogyo Co., Ltd., Kusunoki Machinery Co., Ltd., Tamagawa Machinery Co., Ltd., etc.), and a thin film can be obtained by a suitable peeling means such as a scraper. What is necessary is just to supply to the cylinder of an apparatus. In this case, as a thin film supply means, a single or a plurality of feed rolls or the like may be used. Note that, for example, a structure in which a thin film material in a molten state is supplied to a cylindrical body to form a thin film, and the thin film is cooled as it is, as in a known Flaker device, may be used.

The apparatus of the present invention comprises elements used in a known drum dryer or cooler, such as a means for peeling a heated or cooled thin film, a means for crushing a peeled thin film, and a means for transporting a peeled thin film or a crushed product thereof. May be.

Examples of the compound to be formed into a thin film include a polymer compound having a softening point, for example, an adhesive compound such as a polysulfonic acid copolymer and a polycarboxylic acid copolymer. Examples of polycarboxylic acid copolymers include acrylic acid, methacrylic acid, crotonic acid, maleic anhydride, maleic acid, itaconic anhydride, itaconic acid, citraconic anhydride, citraconic acid, fumaric acid, allylsulfonic acid, and methallylsulfonic acid. Acids or alkali metal salts thereof,
At least one monomer selected from the group consisting of alkaline earth metal salts, ammonium salts and amine salts, and a polyalkylene oxide or terminal ester compound thereof obtained by polymerizing an alkylene oxide on the monomer in an average of 2 to 2,000 mol; And a copolymer with one or more monomers selected from the group consisting of: Examples of the monomer alkylene oxide include ethylene oxide and propylene oxide having an average addition mole number of 2 to 300, preferably 100 to 300. In the production of the thin film, a liquid thin film raw material can be used. For example, as the liquid polycarboxylic acid-based copolymer, a solution such as an aqueous solution or an organic solvent solution of the polycarboxylic acid-based copolymer, a dispersion liquid, Examples thereof include a melt of a carboxylic acid copolymer.

As a starting material for the thin film, a material obtained by mixing one or more kinds of raw materials by a chemical or physical method can be used. For example, JP-A-59-162163, JP-B-2-11542, JP-B-2-11542 It can be produced by a method such as a solvent polymerization method described in JP-A-2-7901, JP-B-2-7897, JP-A-7-223852 and the like. The polycarboxylic acid copolymer used in the present invention has a weight average molecular weight (gel permeation chromatography / polystyrene sulfonic acid conversion) of 3,000 to 1,000,000, particularly 5,
It is preferably from 000 to 100,000 from the viewpoint of dispersibility and dispersion retention when used as a cement dispersant.

[0021]

EXAMPLES Example 1 Polycarboxylic acid copolymer (average molecular weight 50,000, monomer ratio: methanol (average number of moles of ethylene oxide added)
120) 40% aqueous solution of adduct / methacrylic acid ester / sodium methacrylate = 10/90), single drum dryer (diameter 400mm, length 500mm, heat transfer area 0.75m ² , hard chrome plated surface) ), Adhered in a thin film form on the drum surface, and dried by heating steam at 130 ° C. to continuously produce a weakly adhesive thin film. Remove the thin film and use the same type of single-drum dryer (rotational speed of cylindrical body)
10 r / min) and cooled with cold water at 20 ° C. At that time, the following devices were used to evaluate the cooling effect and the like.
The temperature at the start of the supply of the thin film was 60 ° C.

Apparatus A As shown in FIG. 1A, an auxiliary roll (diameter 50 mm, length 500 mm,
The surface was coated with Teflon). As a result, the thin film was cooled down to 25 ° C. without any trouble while maintaining the thickness.

Apparatus B As shown in FIG. 1B, an auxiliary roll (diameter 50 mm, length 500 mm,
The surface was coated with Teflon). As a result, the thin film was cooled down to 25 ° C. without any trouble while maintaining the thickness.

Apparatus C As shown in FIG. 1C, an auxiliary roll (diameter 100 mm, length 500 mm,
The surface was coated with Teflon). As a result, the thin film was cooled down to 25 ° C. without any trouble while maintaining the thickness.

Apparatus D An auxiliary roll (diameter 50 mm, length 500 mm,
The surface of which was coated with Teflon) was installed. As a result, the thin film maintains its thickness without any trouble
Cooled to 23 ° C.

Apparatus E As shown in FIG. 1A, an auxiliary roll (diameter 50 mm, length 500 mm,
A surface coated with Teflon) is installed, and an auxiliary roll (diameter 50 mm, length 500 mm, surface coated with Teflon) as shown in Fig. 1 (c) is provided downstream in the rotation direction of the cylindrical body. ). As a result, the thin film was cooled to 23 ° C. without any trouble while maintaining the thickness.

Apparatus F In FIG. 1A, no auxiliary roll was installed. As a result, the thin film did not cool down well on the cylinder and was not cooled.

Apparatus G In FIG. 1 (a), an auxiliary roll was installed by a fixed shaft so that the clearance was smaller than the thickness of the thin film.
As a result, the thin film was rolled, the original thickness was not maintained, and cooling was possible only up to 35 ° C.

Apparatus H In FIG. 1 (a), an auxiliary roll was set by a fixed shaft so that the clearance was larger than the thickness of the thin film.
As a result, the thin film was not pressed against the cylindrical body, and could be cooled only to 40 ° C.

[Brief description of the drawings]

FIG. 1 is a schematic view of a main part showing an example of an apparatus of the present invention.

[Explanation of symbols]

 1: cylindrical body 2: auxiliary roll 3, 3 ': auxiliary roll support means 4: thin film 5: bearing 6: elastic member

Claims (5)

[Claims] 1. A means for supplying a thin film, and running the thin film,
A cylindrical body provided with a heating means, and an auxiliary roll in contact with the thin film on the cylindrical body, wherein the size of the gap formed by the cylindrical body and the auxiliary roll varies according to the variation in the thickness of the thin film. A variable, thin-film heating device. 2. A thin film supply means, and running the thin film,
A cylindrical body provided with a cooling means, and an auxiliary roll in contact with the thin film on the cylindrical body, and the size of the gap formed by the cylindrical body and the auxiliary roll varies according to the variation in the thickness of the thin film. A fluctuating, thin-film cooling device. 3. The apparatus according to claim 1, wherein the auxiliary roll surface is made of a substance having low adhesion to the thin film. 4. A thin film is run on the surface of a heated cylindrical body, and the thin film is transferred to the surface of the cylindrical body by an auxiliary roll in which the size of a gap between the thin film and the cylindrical body changes according to a change in the thickness of the thin film. And heating the thin film by pressing. 5. A thin film is run on the surface of a cooled cylindrical body, and the thin film is transferred to the surface of the cylindrical body by an auxiliary roll in which a gap between the thin film and the cylindrical body changes according to a change in the thickness of the thin film. And cooling the thin film by pressing.