JP2008163407A - Plating apparatus, submerged roll, and film plating method - Google Patents

Abstract

[PROBLEMS] To prevent a film from slipping on the outer peripheral surface of a submerged roll and causing a scratch on the film surface without using special external power even when the film is conveyed at a low tension. A plating apparatus capable of performing plating automatically.
SOLUTION: At least one plating tank and at least one water washing tank are provided, and in the plating tank and the water washing tank, submerged rolls for changing the film transport direction are provided, and continuous on the surface of the film. A plating apparatus for performing a plating process on the surface of the roll by discharging the plating bath liquid circulating liquid supplied to the inside of the roll on at least the surface of the submerged roll provided in one of the plating tanks A plating apparatus provided with a plurality of through holes for forming a liquid film between them and causing the film to float.
[Selection] Figure 2

Description

  The present invention relates to a plating apparatus for continuously plating a film surface, and more particularly to a plating apparatus and a film plating method in which a submerged roll provided for changing the film transport direction is improved. It is.

  Conventionally, as a light-transmitting conductive material having a thin-line-shaped conductive metal portion, a light-transmitting electromagnetic wave shielding material or the like can be cited as a typical example. As a method for producing an electromagnetic wave shielding material having optical transparency, for example, in Patent Document 1, a photosensitive material in which a silver salt-containing layer is provided on a support such as a film is used, and this is exposed and developed. A method of forming a metallic silver portion and plating the metallic silver portion to form a conductive metallic portion is disclosed. The method described in Patent Document 1 can manufacture a light-transmitting electromagnetic wave shielding material having high electromagnetic wave shielding properties and high transparency at the same time.

  By the way, when plating on the film as described above, it is widely performed to perform a plating process in a continuous plating apparatus provided with a large number of plating tanks and washing tanks. The plating tank and the washing tank are provided with a submerged roller for changing the film transport direction in the liquid. This submerged roller is a non-driving type free roller that is attached to the liquid tank via a bearing and rotated by friction with the resin film being conveyed.

  However, when producing a film-like conductive material by continuously plating on the film, it is necessary to satisfy the dimensional stability (the degree of expansion and contraction of the resin film before and after plating), which is the most important product specification. Therefore, it is necessary to convey the resin film with low tension. On the other hand, when the tension of the resin film is lowered to ensure dimensional stability, a liquid film is generated on the contact surface between the submerged roller and the film due to the free roller, and the frictional force is lowered. As a result, the rotational speed of the submerged roller is not synchronized with the transport speed of the resin film, and the film slips on the outer peripheral surface of the submerged roller. There was a problem that scratches occurred. The occurrence of this slip is noticeably generated in the plating solution.

On the other hand, for example, in Patent Document 2, a driven means that rotates by the power of the driving means is fixed to the submerged roller, and further a power transmission means for transmitting the power of the driving means to the driven means is interposed. A vertical plating apparatus configured to rotate a submerged roller at the same speed as the film transport speed by a driving roller is described. However, this device requires external energy. There has been a demand for such a slip prevention means that does not require the supply of special external energy.
JP 2004-221564 A JP 2000-64089 A

  The object of the present invention is to prevent the film from slipping on the outer peripheral surface of the submerged roll and causing scratches on the film surface without using special external power even when the film is conveyed at a low tension. An object of the present invention is to provide a submerged roll, a plating apparatus, and a film plating method capable of continuously performing plating on a surface.

The present invention
(1) It has at least one plating tank and at least one water washing tank, and in the plating tank and the water washing tank, submerged rolls for changing the film transport direction are provided, and the film surface is continuous. A plating apparatus for performing a plating treatment on the surface of the roll and the film surface by discharging the circulating solution of the plating bath supplied to the inside of the roll to at least the surface of the submerged roll provided in one of the plating tanks. A plating apparatus characterized in that a plurality of through holes are provided to form a liquid film in between and float the film;
(2) A roll provided with a shaft composed of a porous hollow tube having a liquid supply port formed at one end, and a pair of left and right side seals are provided on the surface of the roll, and a plurality of rolls are provided on the roll surface. A liquid roll for transporting a film, characterized by having a through-hole, and the liquid supplied to the liquid supply port is discharged to the outside from the through-hole on the roll surface; and
(3) A plating method in which a film is transported to at least one plating tank and at least one water-washing tank, each of which is provided with a submerged roll for changing the film transport direction, and the surface of the film is continuously plated. Supplying a plating bath liquid circulating liquid to at least one of the submerged rolls provided in one of the plating tanks and discharging it from the plurality of through holes provided on the surface of the roll, A film plating method is characterized in that a liquid film is formed between films to float the film, and the film is conveyed.

  According to the present invention, it is possible to prevent slip by forming a liquid film between the submerged roll and the film.

  The present invention will be described below with reference to the drawings. FIG. 1 is a schematic front view of an embodiment of a plating apparatus according to the present invention. In FIG. 1, 1a, 1b, 1c, 1d are submerged rolls, 2 is a film to be transported, 3 and 5 are washing tanks, 4 and 6 are plating tanks, 7 and 9 cleaning liquids, 8 and 10 are plating liquids, 11a 11b, 11c, 11d, 11e, 11f, and 11g are liquid free rollers, and 12 and 13 are electrodes. In the apparatus of FIG. 1, two sets of washing tanks 3 and 5 and plating tanks 4 and 6 are alternately arranged. In the present invention, the number of washing tanks and plating tanks is at least one plating tank, and at least What is necessary is just to have one water-washing tank, for example, you may have 10 water-washing tanks and plating tanks, respectively.

  In this embodiment, the to-be-plated film 2 is conveyed in the direction shown by the arrow, and is plated in the plating tanks 4 and 6. The transport direction of the film 2 is changed by the submerged rolls 1a, 1b, 1c, and 1d in the liquids of the washing tanks 3 and 5 and the plating tanks 4 and 6.

FIG. 2 is an explanatory view of the plating tank 22 provided with the submerged roll 21 for film conveyance in one embodiment of the present invention. The left side of the center line indicated by the one-dot broken line is a schematic sectional view, and the right side is a side view. It is. In FIG. 2, the position of the film 23 to be conveyed is indicated by a two-dot broken line for easy understanding. A number of through holes 24 are provided on the surface of the submerged roll 21. The liquid is supplied to the through holes 24 as indicated by arrows through the porous hollow tube 25 inside the roll, and the liquid is discharged to the outside, forming a liquid film on the entire roll surface with respect to the film 23, The direction is changed in the plating bath liquid 26 in a state where it floats on the submerged roll 21 without contacting the submerged roll 21. The through-hole 24 is disposed obliquely on the surface of the submerged roll 21 in the generally lower half of the submerged roll 21, and is disposed so that the liquid discharged to the film 23 is uniformly applied as a whole. Further, the porous hollow tube 25 which is also the axis of the submerged roll 21 is fixed to the wall surface of the plating tank 22 by the fixing means 27, so that the submerged roll 21 is also fixed without rotating. A hollow portion is open at one end of the hollow tube 25 to form a liquid supply port 29.
A pair of left and right side seals 28 are fixed to the surface of the submerged roll 21. By passing the film 23 between the side seals 28, even if the film 23 is lifted and transported near the submerged roll 21, the film 23 can be transported without being shifted left and right.

Moreover, the diameter of the through-hole 24 becomes like this. Preferably it is 1-8 mm, More preferably, it is 3-5 mm. The pitch between the through holes 24 is preferably 15 to 50 mm, more preferably 20 to 30 mm.
The shape of the through hole 24 may not be round, and may be a long hole (for example, width 2 mm × length 5 mm).
In the present invention, the flying height of the film is preferably about 5 mm from the roll. What is necessary is just to adjust the liquid quantity of the circulating liquid sent to a roll according to the tension of conveyance of a film.

FIG. 3 is a schematic sectional view of the submerged roll 21 shown in FIG. The plating circulating liquid sent from the liquid supply port 29 is sent out from the hole provided in the hollow cylinder 25 to the hollow portion 30 between the main body surface of the roll 21 and the hollow tube 25, and further provided on the surface of the roll 21. The liquid is sent out from the through-hole 24, and a liquid film is formed between the roll surface and the film to float the film to prevent contact with the roll, thereby preventing the occurrence of slip. Further, a side seal 28 is provided fixed to the lower half of the submerged roll 21 in general.
As the hollow tube 25, for example, stainless steel, titanium, or the like can be used. The submerged roll 21 is preferably made of resin so as to be insulated.
Such a fixed submerged roll 21 is structurally simple and can be easily manufactured.

  FIG. 4 is a schematic cross-sectional view of the submerged roll 31 in another embodiment of the present invention. In this embodiment, the submerged roll 31 and the hollow tube 32 are joined via the bearing 33, and the submerged roll 31 can be rotated by the action of the bearing 33. Further, the through holes 34 are provided over the entire circumference of the surface of the roll 31, and even if the roll 31 rotates, a liquid film can be formed on the entire surface with respect to the fill, and the film can be floated and conveyed. Further, the side seal 35 is also provided over the entire circumference of the surface of the roll 31, and even if the roll 31 rotates, the meandering of the film can be prevented.

  Moreover, in the roll 31 of this aspect, even if the pump which sends a liquid to the water supply port 36 stops, it can rotate and can prevent a slip. In this case, the plating solution enters the inside of the roll 31 in reverse from the through hole 34, and the effect of preventing the slip by completely bringing the roll and the film into close contact with each other can be enhanced.

  Next, the flow of the circulating liquid in the plating process using the plating apparatus in the embodiment shown in FIG. 2 will be described with reference to the explanatory diagram of FIG. The same reference numerals as those shown in FIG. 2 have the same meaning as in FIG. The plating bath liquid 26 overflowed from the plating tank 22 is stored in the tank 41 and then sent to the tank 43 through the pipe 42. Next, the circulating fluid is branched from the tank 43 by the pump 44, and the flow rate is adjusted by the adjusting valve 46 while one is monitored by the flow meter 45, and supplied from the liquid supply port 29 to the hollow tube 25 through the pipe 47. . The circulating solution of the plating bath solution supplied to the hollow tube 25 is discharged from the hole provided in the hollow tube 25 to the hollow portion 30 inside the roll in the direction of the arrow, and further between the through hole 24 and the film 23. The film is discharged in the direction of the arrow, a liquid film is formed on the entire surface between the roll 21 and the film 23, and the film 23 is lifted with respect to the roll 21 and conveyed. Further, the other circulating fluid branched is adjusted by the adjusting valve 49 while being monitored by the flow meter 48, and is returned to the plating tank 22 through the pipe 50. In addition, a flexible tube etc. can be used suitably for piping 42, 47, 50.

  In the present invention, for the plating treatment, electroless plating (chemical reduction plating or displacement plating), electrolytic plating, or both electroless plating and electrolytic plating can be used. For the electroless plating in the present invention, a known electroless plating technique can be used, for example, an electroless plating technique used for a printed wiring board or the like can be used, and the electrolytic copper plating is an electroless copper plating. Preferably there is. Examples of the electrolytic copper plating bath liquid include a copper sulfate bath and a copper pyrophosphate bath. Chemical species contained in the electroless copper plating bath include copper sulfate and copper chloride, formalin and glyoxylic acid as the reducing agent, EDTA and triethanolamine as the copper ligand, and other bath stabilization and plating films. Examples of additives for improving the smoothness of polyethylene include polyethylene glycol, yellow blood salt, and bipyridine. Moreover, various additives, such as ligands, such as EDTA, can also be used for a plating bath liquid from a viewpoint of improving the stability of a plating bath liquid, for example.

  The plated film is removed by, for example, removing the plating bath solution adhering after bathing into the plating bath solution with an air knife, carrying it into a water rinsing tank, performing rust-proofing treatment after washing, etc., and drying and winding up. .

  In the present invention, as the film, for example, a long and wide flexible base material made of a photosensitive material in which a silver salt-containing layer containing a silver salt (for example, silver halide) is provided on a light-transmitting support is preferably used. Can do. Further, a protective layer may be provided on the silver salt-containing layer, and this protective layer means a layer made of a binder such as gelatin or a high molecular polymer, and exhibits an effect of preventing scratches and improving mechanical properties. In order to do so, it is formed on the silver salt-containing layer. The composition of these silver salt-containing layers and protective layers may be suitably applied to silver salt-containing layers and protective layers applied to silver salt photographic films, photographic paper, printing plate making films, emulsion masks for photomasks, and the like. it can.

  As the photosensitive material, a silver salt photographic film (silver salt photosensitive material) is preferable, and a black and white silver salt photographic film (monochrome silver salt photosensitive material) is the best. The silver salt applied to the silver salt-containing layer is most preferably silver halide.

  In addition, it is preferable that the thickness of a protective layer is 0.02-10 micrometers, More preferably, it is 0.05-5 micrometers, More preferably, it is 0.1-1 micrometers.

  In addition, as the light transmissive support, a plastic film or a multilayer film in which two or more layers thereof are combined can be applied. Examples of the raw material include polyethylene terephthalate (PET) and polyethylene naphthalate. Polyesters; Polyolefins such as polyethylene (PE), polypropylene (PP), polystyrene, EVA; Vinyl resins such as polyvinyl chloride and polyvinylidene chloride; Others, polyether ether ketone (PEEK), polysulfone (PSF), poly Ether sulfone (PES), polycarbonate (PC), polyamide, polyimide, acrylic resin, triacetyl cellulose (TAC), and the like can be used.

  Among these, from the viewpoint of transparency, heat resistance, ease of handling, and cost, the plastic film as the support is a polyethylene terephthalate film or cellulose triacetate film that is usually applied to silver salt photographic films (silver salt photosensitive materials). In addition, it is preferably a polyimide film or a polyester film. In particular, a polyester film is most preferable.

  In the plating apparatus described above, a light-sensitive photosensitive web provided with a silver salt-containing layer is used, and the silver salt-containing layer is exposed and developed to form a desired thin linear metal silver portion as a portion to be plated. When the light-transmitting photosensitive web is plated, conductive particles are supported on the fine-line metal silver part, and this becomes a conductive metal part, and the fine-line metal part patterned with very fine fine lines and A magnetic wave shielding material having a large-area light transmission part can be obtained.

It is a schematic front view of one embodiment of the plating apparatus of the present invention. It is explanatory drawing of the plating tank in one embodiment of this invention. It is a schematic sectional drawing of the roll in a liquid in one embodiment of this invention. It is a schematic sectional drawing of the submerged roll in another embodiment of this invention. It is explanatory drawing of an example of the flow of the circulating liquid in the plating process of this invention.

Explanation of symbols

1, 1a, 1b, 1c, 1d Roll in liquid 2 Film 3, 5 Rinsing tank 4, 6 Plating tank 7, 9 Rinsing liquid 8, 10 Plating bath liquid 11a, 11b, 11c, 11d, 11e, 11f, 11g Outside the liquid Free roller 12, 13 Electrode 21, 31 Roll in liquid 22 Plating tank 23 Film 24, 34 Through hole 25, 32 Hollow tube 26 Plating bath liquid 27 Fixing means 28, 35 Side seal 29, 36 Water supply port 30 Hollow part 33 Bearing 41, 43 Tank 42, 47, 50 Piping 44 Pump 45, 48 Flow meter 46, 49 Adjustment valve

Claims (3)

  It has at least one plating tank and at least one water washing tank. In the plating tank and the water washing tank, submerged rolls that change the film transport direction are provided, and the film surface is continuously plated. A plating apparatus for discharging a circulating solution of the plating bath supplied to the inside of the roll to at least the surface of the submerged roll provided in one of the plating tanks, and a liquid between the surface of the roll and the film. A plating apparatus comprising a plurality of through holes for forming a film and floating the film.   A roll having a shaft composed of a porous hollow tube having a liquid supply port formed at one end thereof, and a pair of left and right side seals are provided on the surface of the roll, and a plurality of transparent surfaces are provided on the surface of the roll. A submerged roll for transporting a film having holes, wherein the liquid supplied to the liquid supply port is discharged to the outside through a through hole on the surface of the roll.   A plating method in which a film is transported to at least one plating tank and at least one water-washing tank, each of which is provided with a submerged roll for changing the film transport direction, and is continuously plated on the surface of the film. The plating bath solution circulating liquid is supplied to the inside of the submerged roll provided in one of the tanks and discharged out of the roll through a plurality of through holes provided on the surface of the roll, and between the surface of the roll and the film A method of plating a film, comprising forming a liquid film on the surface to float the film and transporting the film.

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