JP3473945B2 - Continuous hydrophilic treatment apparatus and continuous hydrophilic treatment method for long fluororesin material - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to perform a hydrophilic treatment on the surface of a fluororesin material as a pretreatment step when metal plating is applied to the surface of a fluororesin long wire such as a fluororesin insulated wire. The present invention relates to a continuous treatment device and a continuous hydrophilic treatment method.

[0002]

2. Description of the Related Art Generally, when electroless metal plating is applied to the surface of a fluororesin, the surface of the fluororesin material is hydrophilized as a pretreatment for improving the adhesion between the fluororesin and the plating metal. . In this case, if the material to be treated is a long material, the hydrophilic treatment of the material to be treated is not a batch treatment but a continuous treatment. As the fluorine-based resin, a solid fluorine-based resin or a porous fluorine-based resin has been used.

As an apparatus (tank) for continuously hydrophilizing such a fluororesin long material, an overflow circulation type processing tank as shown in FIG. 6 has been conventionally used. This will be described below with reference to the drawings.

As the material to be treated w, a long length of fluororesin having a porous fluororesin extruded and coated on the outer periphery of the center conductor was used. The hydrophilic treatment tank 100 includes partition plates 104 inside the inlet 102 and outlet 103 of the material w to be treated on both sides of the tank.
05 is provided, and the liquid tank portion 101 in which the hydrophilic treatment liquid L is placed
And the overflow tank portions 106 and 107. Inlet and outlet 102 of the material w to be treated in the treatment tank 100
3 and the partition plates 104, 105 are provided with cut grooves at the passage openings of the workpiece W. Further, a covered storage tank 108 in which the hydrophilic treatment liquid L is stored is provided separately from the processing bath 100. The storage tank 108 is connected to the liquid tank section 101 of the processing tank 100 via a pump P via a liquid feed pipe 109, and is further connected to the overflow tank sections 106 and 107 of the processing tank 100 via reflux pipes 110 and 111. A circulation path for the processing liquid L is formed between the processing tank 108 and the processing tank 100. The processing liquid L is sent from the storage tank 108 to the liquid tank portion 101 of the processing tank 100 by the pump P via the liquid feed pipe 109 and is filled in the liquid tank portion 101. Also, the liquid tank section 101
The processing liquid L overflowing from the partition plates 104 and 105 of FIG. 2 flows down into the overflow tank portions 106 and 107, and the reflux pipe 11 connected to the bottoms of the overflow tank portions 106 and 107.
It is returned to the storage tank 108 through 0 and 111. The material to be processed w is transferred from the inlet 102 of the processing tank 100 to the partition plate 104.
Through the liquid tank 101, the surface of the material to be processed w is hydrophilized by the processing liquid L, and is guided to the next processing step through the partition plate 105 and the outlet 103 of the processing tank 100. It

[0005]

A metal sodium naphthalene complex solution is used as a hydrophilic treatment liquid for the surface of a fluororesin, but the metal sodium naphthalene complex solution is a solution which is extremely easily oxidized, and particularly air. Oxidation and gelation proceed due to contact, resulting in a decrease in the activity of the solution. However, since the above-mentioned conventional continuous hydrophilization treatment tank 100 of a fluororesin long material uses an overflow circulation type treatment tank, the treatment liquid L is structurally used as the treatment liquid L. , 107, etc., easily come into contact with air, and the processing liquid L overflows the tanks 106, 107.
There are many paths in which the treatment liquid L and the air come into contact with each other, such as when air is entrained when it is returned from the storage tank 108 to the storage tank 108. Therefore, there is a problem that deterioration of the treatment liquid L due to oxidation progresses in a short time and the life of the liquid is shortened. Furthermore, when the material w to be processed is introduced into the liquid tank section 101, the air layer on the surface of the material w to be processed is entrained in the processing liquid L together with the material w to be processed, so that the passage path of the material w to be processed passes. There is also a problem that the treatment liquid L is gradually oxidized and gelled to form a tunnel-shaped passage, and it becomes difficult for the material w to be treated and the treatment liquid L to come into contact with each other, and the hydrophilic treatment is not performed. Therefore, when the hydrophilic treatment of the long material is continuously performed for a long time, it is necessary to provide two treatment tanks as shown in FIG. 6 and use them alternately. I didn't get it.

Further, when the continuous hydrophilic treatment of the porous fluororesin elongate material is performed, since the porous fluororesin is porous, which is a feature of its structure, if the hydrophilic treatment time is long, Not only the surface but also the inside of the porous fluororesin body has been rendered hydrophilic. Therefore, if the long material whose inside has been made hydrophilic is plated with metal in the next step, the inside is also plated, so that there is a problem that the high-frequency transmission characteristics deteriorate.

The present invention has been made in order to solve various problems of the above-mentioned prior art, and prevents oxidation of the hydrophilic treatment liquid to prolong the service life of the treatment liquid and stabilize it for a long time. The length of the fluororesin can be treated by hydrophilization, and even in the case of a long material that uses a porous fluororesin, the surface of the porous fluororesin can be continuously hydrophilized. An object of the present invention is to provide a continuous hydrophilization treatment device and a continuous hydrophilization treatment method for a scale material.

[0008]

As a first aspect of the present invention, the present invention continuously uses a hydrophilizing treatment solution for the outer periphery of a fluororesin long material in which the outer periphery of a central conductor is coated with a fluororesin. A continuous hydrophilization treatment device for performing a hydrophilization treatment, wherein the continuous hydrophilization treatment device applies a predetermined amount of the hydrophilization treatment liquid to the outer periphery of the fluororesin elongate material in a sealed state. A die coating means capable of supplying a necessary amount of a hydrophilizing treatment liquid in a sealed state to the die coating means; and a fluorine resin length by the die coating means. An air wiper means capable of removing the hydrophilization treatment liquid applied to the outer periphery of the scale material by blowing air; and a straight line between the die coating means and the air wiper means. The composition In continuous hydrophilic treatment apparatus Motokei resin long material. In the continuous hydrophilic treatment device of the first aspect, the hydrophilic treatment liquid can be applied to the outer periphery of the fluororesin long material in a hermetically sealed state, and the dice coating means can be hermetically sealed. Since it has a processing solution fixed amount supply means that can supply the required amount of the processing solution for hydrophilization, it prevents oxidation of the processing solution to prolong the life of the processing solution and stabilizes for a long time. A hydrophilic treatment can be performed. In addition, a stable supply of the processing liquid can be measured by the processing liquid quantitative supply means. The hydrophilizing treatment liquid adhered to the outer periphery of the fluororesin long material by the die coating means can be immediately removed by blowing air of the air wiper means. In the case of the shaku material, only the surface of the porous fluororesin can be subjected to the continuous hydrophilization treatment, the treatment time can be shortened, overetching can be prevented, and uniform treatment can be performed. Further, since the die coating means and the air wiper means have a straight line structure, continuous hydrophilic treatment can be performed in an extremely short time.

As a second aspect of the present invention, in the die coating means, the inside is tapered from the die inlet portion to the die outlet portion, and the outlet portion is a die portion having a predetermined hole diameter. , The inside of which is a hollow pipe shape, and the treatment length changing pipe portion whose hydrophilicity can be changed by changing the length, and the die portion and the treatment length changing pipe portion are exchangeably held and A continuous hydrophilization treatment device for a long length of fluororesin comprising a die body and a die body capable of introducing a treatment liquid into the treatment length changing pipe portion. In the continuous hydrophilic treatment device according to the second aspect, the die coating means includes a die portion having a specific shape,
Since it comprises a processing length changing pipe section and a die body section, it can be preferably used as a die coating means of the continuous hydrophilic treatment apparatus of the first aspect. The die portion is tapered from the die inlet to the die outlet, and since the outlet portion has a predetermined hole diameter, it is possible to prevent the excess treatment liquid from being discharged to the outer periphery of the material to be treated and No uneven processing occurs on the material surface. Further, the treatment length changing pipe portion has a hollow pipe shape inside, and the treatment length can be changed by changing the length. The processing time can be changed. Since the die body portion holds the die portion and the processing length changing pipe portion exchangeably, the die portion and the processing length changing pipe portion can be easily exchanged to the optimum ones when necessary. Further, the die body portion can introduce the hydrophilic treatment liquid into the die portion and the treatment length changing pipe portion.

According to a third aspect of the present invention, the distance between the die outlet of the die coating means and the air wiper means is 5
It is in a continuous hydrophilic treatment device for a long length of fluororesin having a length of 0 mm to 100 mm. In the continuous hydrophilic treatment device of the third aspect, the distance between the outlet of the die coating means and the inlet of the air wiper means is set to 50 mm to 100 mm. The hydrophilic treatment liquid applied to the outer periphery can be suitably removed by an air wiper means. If the distance is shorter than 50 mm, the air is too strongly applied to the die coating means, which is not preferable, and if the distance is longer than 100 mm, the treatment time becomes long and the hydrophilization treatment proceeds too much, which is not preferable.

As a fourth aspect of the present invention, in addition to the continuous hydrophilic treatment device described in the first to third aspects, the die coating means and the air wiper means are housed while being shielded from the outside air. A storage means for collecting the waste liquid of the hydrophilic treatment liquid removed by the air wiper means, and a waste liquid recovery means for collecting the waste liquid from the liquid collection means. In the continuous hydrophilization treatment apparatus for a long length of fluororesin, which is provided with a means, and further with an exhaust means for exhausting gas volatilized from the waste liquid in the storage means. In the continuous hydrophilization treatment apparatus of the fourth aspect, since the die coating means and the air wiper means are provided with a housing means for housing while shielding them from the outside air, the dice coating means and the air wiper means are protected and dust. Since the like does not adhere, the continuous hydrophilic treatment can be favorably performed. Further, since the liquid collecting means and the waste liquid collecting means are provided, the waste liquid can be collected and collected well. Further, since the exhaust means is provided, the gas volatilized from the waste liquid can be exhausted.

As a fifth aspect of the present invention, in the present invention, one or more stages of alcohol cleaning means and one stage of water cleaning means are provided subsequent to the continuous hydrophilization treatment apparatus described in the first to fourth aspects. It is in the apparatus for continuously hydrophilizing a long length of fluororesin provided above. In the continuous hydrophilization treatment apparatus of the fifth aspect, the alcohol washing means is used in one or more stages, and the water washing means is used in one or more stages. Therefore, the hydrophilization treatment liquid which is not removed by the air wiper means is completely removed. The metal plating in the subsequent step can be further favorably performed.

As a sixth aspect, the present invention provides a method of extruding a fluorocarbon resin around the outer periphery of a central conductor to form a long fluorocarbon resin material, immediately after the extrusion step, from the first aspect to the fifth aspect. The continuous hydrophilization treatment method using the continuous hydrophilization treatment apparatus described in 1. is performed to perform the hydrophilization treatment by in-line treatment with the continuous hydrophilization treatment step. In the continuous hydrophilic treatment method of the sixth aspect,
Since a continuous hydrophilization treatment step is provided immediately after the extrusion processing step and the treatment is performed in-line, man-hours can be reduced, quality can be improved, and cost can be reduced.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the contents of the present invention will be described in more detail with reference to the embodiments shown in the drawings. The present invention is not limited to this. FIG. 1 is a schematic diagram for explaining a first embodiment of a continuous hydrophilization treatment device for a long length of fluororesin of the present invention.

As shown in FIG. 1, in the continuous hydrophilization treatment apparatus of the present invention, the outer periphery of the central conductor is extruded and coated with a fluororesin, and the outer periphery of a fluororesin long material (material to be treated) w is made hydrophilic. An apparatus for continuously performing a hydrophilization treatment by using the hydrophilization treatment liquid 21, which is a die capable of applying the hydrophilization treatment liquid 21 to the outer circumference of the fluororesin long material w in a sealed state. A coating means 10; a treatment liquid constant amount supply means 20 capable of supplying the necessary amount of the hydrophilic treatment liquid 13 to the die coating means 10; and a long-diameter fluorine resin w by the die coating means 10. And an air wiper means 30 capable of removing an excess of the hydrophilic treatment liquid applied to the outer periphery of the die by blowing air, and the die applying means 10 and the air wiper means 30 are further provided. Straight line configuration It is going on continuous hydrophilic treatment device.

The fluororesin extruded coating material of the long length of fluororesin w is tetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-6. It is a solid body or a porous body such as a propylene fluoride copolymer (FEP) and a tetrafluoroethylene-ethylene copolymer (ETFE). The hydrophilic treatment liquid 21 is, for example, a metal sodium naphthalene complex solution, and examples thereof include Tetra Etch (trade name, Junkosha Co., Ltd.). The hydrophilic treatment liquid 21 is stored, for example, in a polyethylene container with a lid. The die coating means 10 uses, for example, a die to seal the hydrophilic treatment liquid 13 in a sealed state, and to extend the fluorine resin long material w.
It is a die coating device capable of coating the outer periphery of the.
The processing liquid constant quantity supply means 20 is, for example, a supply device using a constant quantity pump, and specifically, an Iwaki electromagnetic constant quantity pump (trade name) can be used. The material of the processing liquid portion of the pump is, for example, a fluorine-based resin, and the piping material is, for example, polyethylene. The air wiper means 30 is, for example, an air blowing device capable of removing the treatment liquid 13 on the outer periphery of the fluororesin long material w coated with the hydrophilic treatment liquid 13 by blowing air. It is preferable that the distance m between the die outlet of the die coating means and the inlet of the air wiper means be adjusted to, for example, 50 mm to 100 mm. In addition, a metal material such as stainless steel or a plastic material such as polypropylene or polyethylene that is not corroded by the metal sodium naphthalene complex solution is used for each structural material of the continuous hydrophilic treatment device.

FIG. 2 is a schematic view for explaining the die coating means and the air wiper means used in the continuous hydrophilic treatment apparatus for the long length of fluororesin of the present invention, and FIG. 2 (a).
Is a top view of the die coating means, FIG. 2B is a side view of the die coating means and the air wiper means, FIG. 3C is a vertical sectional view of the die portion, and FIG. 2D is an outlet portion of the die portion. FIG. The die coating means 10 is capable of coating a predetermined amount of the hydrophilic treatment liquid 21 on the outer periphery of the fluororesin elongate material w, and the inside is tapered from the die inlet portion i to the die outlet portion o. The outlet part o is a die part 11 having a predetermined hole diameter, and the inside is a hollow pipe shape, and the processing length changing pipe part capable of changing the hydrophilization processing length by changing the length. 12 and the die part 1
1 and the processing length changing pipe portion 12 are held so that they can be disassembled and assembled, and the hydrophilic treatment liquid 21 is composed of the die portion 11 and a die body portion 13 capable of being introduced into the processing length changing pipe portion 12. Has been done. The die part 11 has, for example, a length of 50 mm, the inside thereof is tapered from the inlet part i to the outlet part o, and the hole diameter of the outlet part o is 2.5 mm. Further, the die portion 11 can be replaced with a die having an arbitrary hole diameter depending on the size of the fluororesin long material. The processing length changing pipe unit 12 has, for example, a length of 50.
mm, and has a pipe shape. The pipe portion 12 can be replaced with a pipe portion having an arbitrary length depending on the hydrophilic treatment time and the like. Further, it is preferable to reduce the diameter of the pipe hole at the inlet end of the pipe portion 12 against leakage of the processing liquid.
The die body portion 13 has a structure in which the die portion 11 and the processing length changing pipe portion 12 can be held and exchanged by a fixing bolt b, and can be divided by four body dividing bolts b ′. Further, the hydrophilic treatment liquid 21 can be introduced into the die portion 11 and the treatment length changing pipe portion 12. The air wiper means 30 can blow off the hydrophilic treatment liquid on the outer periphery of the long material w by blowing air a onto the fluororesin long material w coated with the hydrophilic treatment liquid 13. The structure of the air wiper device, the main body material is brass, and the piping material is polyethylene. Although the path of the long length of fluororesin is shown by the dotted line, it is supported in a straight line by the pulleys k, k.

FIG. 3 is a schematic view for explaining another embodiment of the apparatus for continuously hydrophilizing a fluororesin long material of the present invention. This continuous hydrophilization treatment apparatus collects the waste liquid 21 ′ of the hydrophilization treatment liquid removed by the air wiper means 30 in addition to the die coating means 10, the treatment liquid quantitative supply means 20, and the air wiper means 30. For collecting the waste liquid 21 ′ dropped from the liquid collecting means 40, the die coating means 10, the air wiper means 30, the liquid collecting means 40, and the waste liquid collecting means 50. The processing apparatus is configured by a storage means 60 for blocking and storing from the outside air, and an exhaust means 70 for exhausting gas volatilized from the waste liquid 21 'in the storage means 60. The liquid collecting means 40 is a cylindrical body having a gradient so that the lower side becomes narrower, or a funnel or the like. The waste liquid collecting means 50 is, for example, a polyethylene mug with a handle. Also, the storage means 60
Is the die coating means 10, the air wiper means 30,
The liquid collecting means 40 and the waste liquid recovery container 50 can be housed while being shielded from the outside air, and are made of a material which is not corroded by the gas from the hydrophilic treatment liquid or the treatment waste liquid, for example, stainless steel. Further, since the confirmation window g made of, for example, glass is provided on the upper portion of the storage means 60, the die coating means 10 and the like can be confirmed. Although not shown in the drawing, the upper portion of the storage means 60 can be opened and closed, and the die portion 11 of the die coating means 10 can be replaced or inspected. Also, the lateral portion of the storage means 60 can be opened and closed to collect waste liquid. Fifty
It has a structure that can take out. Further, the waste liquid collecting means 5
The waste liquid 21 ′ of 0 may be pumped outside.

FIG. 4 is a schematic view for explaining still another embodiment of the apparatus for continuously hydrophilizing a long length of fluororesin of the present invention. This continuous hydrophilization treatment device is provided with an alcohol cleaning means after the continuous hydrophilization treatment device.
This is a configuration in which one stage and one stage of water cleaning means are provided. A normal cleaning device can be used for the alcohol cleaning means and the water cleaning means.

FIG. 5 is a flow chart for explaining the method for continuously hydrophilizing a long length of fluororesin of the present invention.
This continuous hydrophilization treatment method is a continuous hydrophilization treatment using the continuous hydrophilization treatment apparatus immediately after the extrusion process of extruding a fluororesin on the outer periphery of the central conductor to form a fluororesin long material. In-line processing with a chemical treatment process,
This is a continuous hydrophilization treatment method in which an alcohol washing step and a water washing step are subsequently performed to obtain the fluororesin elongated material having been hydrophilized. In addition, the said extrusion process process uses the normal extrusion process method.

Next, the continuous hydrophilization treatment apparatus of the present invention shown in FIG. 3 and the conventional continuous hydrophilization treatment tank shown in FIG. 6 are used, and the hydrophilization (etching) time is changed to obtain fluorine. A continuous hydrophilic treatment was performed on the outer periphery of the long base resin material. The treatment time and the result of the hydrophilic treatment at that time are shown in Table 1 below. In both the example and the conventional example, the material to be treated is 0.162 mm.
A long-diameter porous fluororesin material having an outer diameter of 0.49 mm obtained by extruding a porous PTFE resin onto a silver-plated copper-clad steel wire having a diameter. A metal sodium naphthalene complex solution was used as the hydrophilic treatment liquid.

[0022]

[Table 1] Treatment time and results of hydrophilic treatment

As is clear from Table 1, when the continuous hydrophilization treatment apparatus of the present invention is used, the etching treatment time can be shortened as compared with the case where the conventional continuous hydrophilization treatment tank is used. Not only that, even when the treatment time is long, only the surface is subjected to the hydrophilization treatment, which shows that the range of the treatment time is remarkably improved.

[0024]

EFFECTS OF THE INVENTION According to the continuous hydrophilization treatment apparatus and continuous hydrophilization treatment method for a long length of fluororesin of the present invention, when the long length of fluororesin enters the die coating means. Since the hydrophilization treatment liquid conveyed by the treatment liquid quantitative supply means is filled, the treatment liquid does not come into contact with air, and a uniform and stable hydrophilization treatment is performed in a short time. Especially in the case of long material using porous fluororesin,
Since only the surface of the porous fluorinated resin can be continuously hydrophilized, the treatment time can be shortened, overetching can be prevented, and uniform treatment can be performed. Therefore, when the metal plating is performed, the metal plating can be performed only on the surface, and the high frequency transmission characteristics are improved. Therefore, the present invention is extremely effective in contributing to industry.

[Brief description of drawings]

FIG. 1 is a schematic view for explaining a first embodiment of a continuous hydrophilization treatment apparatus for a long length of fluororesin according to the present invention.

FIG. 2 is a schematic diagram for explaining a die coating means and an air wiper means used in the continuous hydrophilic treatment device for a long-diameter fluororesin of the present invention, and FIG. 2 (a) is a top view of the die coating means. , (B) is a side view of the die coating means and the air wiper means, (c) is a vertical sectional view of the die part,
Further, FIG. 3D is a front view of the exit portion of the die portion.

FIG. 3 is a schematic view for explaining another embodiment of the continuous hydrophilization treatment apparatus for a long length of fluororesin of the present invention.

FIG. 4 is a schematic view for explaining still another embodiment of the continuous hydrophilization treatment device for a long length of fluororesin of the present invention.

FIG. 5 is a flow chart for explaining a method for continuously hydrophilizing a fluororesin long material of the present invention.

FIG. 6 is a side view of a conventional continuous hydrophilization treatment tank for a fluororesin long material.

[Explanation of symbols]

10 Dice coating means 11 Dice part 12 Processing length change pipe part 13 Dice body 20 Processing liquid quantitative supply means 21 Hydrophilization treatment liquid 21 'waste liquid 30 Air wiper means 40 Liquid collection means 50 Waste liquid recovery means 60 storage means 70 Exhaust means a air b Fixing bolt b'Bolt for dividing the body g Confirmation window i Dice entrance k pulley m distance o Dice exit t Tapered taper Fluorine resin long material (material to be treated)

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-50-155987 (JP, A) JP-A-9-327653 (JP, A) JP-A-9-111472 (JP, A) JP-A-9- 78288 (JP, A) JP 8-266996 (JP, A) JP 6-316768 (JP, A) JP 4-4065 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) C23C 18/20 B05C 3/02 B05D 5/00 B05D 7/20

Claims (6)

(57) [Claims] 1. A continuous hydrophilization treatment for continuously hydrophilizing the outer circumference of a fluororesin long material, in which the outer circumference of a central conductor is coated with a fluororesin, using a hydrophilization treatment liquid. An apparatus, wherein the continuous hydrophilization treatment apparatus is a die coating means capable of coating a predetermined amount of the hydrophilization treatment liquid on the outer periphery of the fluororesin elongate material in a sealed state; and the die coating. Means for supplying a necessary amount of the hydrophilic treatment liquid in a sealed state to the means; and a hydrophilic treatment liquid applied to the outer periphery of the fluororesin long material by the die coating means. Means for removing air by blowing air; and, wherein the die coating means and the air wiper means have a straight line structure. Continuous parent of long material Sexual processing apparatus. 2. The die coating means has a tapered inner portion from a die inlet portion to a die outlet portion, and the outlet portion has a die portion having a predetermined hole diameter and an inner portion having a hollow pipe shape. , The processing length changing pipe part capable of changing the hydrophilicizing treatment length by changing the length, and the die part and the processing length changing pipe part are held exchangeably, and the hydrophilicizing treatment liquid is held in the die part. 2. A continuous hydrophilization treatment apparatus for a long length of fluororesin according to claim 1, further comprising: a die body that can be introduced into the treatment length changing pipe. 3. A continuous hydrophilization treatment for a long length of fluororesin according to claim 1, wherein the distance between the die outlet of the die coating means and the air wiper means is 50 mm to 100 mm. apparatus. 4. In addition to the continuous hydrophilization treatment apparatus according to any one of claims 1 to 3, there is provided a storage means for storing the die coating means and the air wiper means while shielding them from the outside air, and Inside the storing means, there are provided a collecting means for collecting the waste liquid of the hydrophilic treatment liquid removed by the air wiper means, and a waste liquid collecting means for collecting the waste liquid from the collecting means, and further in the storing means. An apparatus for continuously hydrophilizing a long length of fluororesin, which is provided with an exhaust means for exhausting gas volatilized from the waste liquid. 5. Fluorine characterized by further comprising one or more stages of alcohol cleaning means and one or more stages of water cleaning means subsequent to the continuous hydrophilization treatment apparatus according to any one of claims 1 to 4. Continuous hydrophilic treatment device for long series of resin. 6. The continuous hydrophilization treatment apparatus according to claim 1, immediately after the extrusion step of extruding a fluororesin on the outer periphery of the center conductor to form a fluororesin long material. A method for continuously hydrophilizing a fluororesin long material, which comprises performing a hydrophilization treatment by in-line by providing a continuous hydrophilization treatment step using.