JPH06293836A - Production of thin tube having treated inner surface and production apparatus therefor - Google Patents

Abstract

PURPOSE:To continuously and efficiently produce the subject thin tube having excellent antithrombogenetic property and biocompatibility and useful for artificial blood vessel, etc., by irradiating a target with an ion beam, etc., from the outside of the thin tube through the tube and forming a film on the inner surface of the thin tube by sputtering, etc. CONSTITUTION:This thin tube is produced by placing a target in a thin tube of a polymeric material such as silicone rubber at a part to form the thin tube to a prescribed diameter, irradiating the target with ion beam or laser beam from the outside of the thin tube through the thin tube and forming a film on the inner surface of the thin tube by sputtering or ablation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing an inner surface-treated thin tube, and more particularly, to an inner surface-treated thin tube for manufacturing an inner surface-treated thin tube by an ion beam sputtering method or a laser abrasion method. Regarding the device.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 62-74633 proposes a "method for producing a conductive thermoplastic resin tube". This is a thermoplastic resin tube extruded from an extruder, passed through the inside of the ion implanter to be externally treated,
It imparts conductivity to the outer surface. Further, the thermoplastic resin tube extruded from the extrusion molding machine is passed through the outside of the ion implantation device to be subjected to inner surface treatment to impart conductivity to the inner surface.

[0003]

PROBLEMS TO BE SOLVED BY THE INVENTION Since capillary tubes made of a polymer material used in the medical field such as artificial blood vessels and catheters are required to have antithrombotic properties, biocompatibility, antibacterial properties, sterilization properties, etc.
Surface treatment is required. Further, surface treatment is also required for thin tubes for food transportation. The outer surface of the thin tube can be treated by applying the above-mentioned “method for producing a conductive thermoplastic resin tube”. However, the inner surface treatment of the thin tube is impossible. This is because it is impossible to put the ion implantation device inside a thin tube having a small diameter. Then, the objective of this invention is to provide the manufacturing method and manufacturing apparatus of the inner surface treatment thin tube which can manufacture suitably the inner surface treated thin tube.

[0004]

According to a first aspect of the present invention, a target is provided inside a thin tube, the target is irradiated with an ion beam or a laser beam from the outside of the thin tube through the inside of the thin tube, and the thin tube is sputtered or abraded. Provided is a method for manufacturing an inner surface-treated thin tube, which is characterized in that a film is formed on the inner surface.

In a second aspect, the present invention provides a target inside a thin tube of a portion where a thin tube of a polymeric material is formed to have a predetermined diameter, and irradiates the target with an ion beam or a laser beam from outside the thin tube through the inside of the thin tube. There is provided a method for producing an inner surface-treated thin tube, which comprises forming a film on the inner surface of the thin tube by sputtering or abrasion.

In a third aspect, the present invention is an extrusion molding means for extruding a molten polymer material from a gap between a die and a core to form a thin tube, and the extrusion molding means from the core side to the non-core side. A space communicating with the inside of the core, a target provided on the core, and the target is irradiated with an ion beam or a laser beam from the side opposite to the core of the extrusion molding means through the space to form a film on the inner surface of the thin tube by sputtering or abrasion. And a beam irradiating means for producing the inner surface-treated thin tube.

[0007]

In the method and apparatus for manufacturing the inner surface treated thin tube of the present invention, the target is provided inside the thin tube. Then, an ion beam or a laser beam is irradiated from the outside of the thin tube through the inside of the thin tube. Then, the particles of the target are emitted from the target surface by sputtering or abrasion and reach the inner surface of the capillary to form a film. Since only the target is provided inside the thin tube, the inner surface of the thin tube having a small inner diameter can be preferably treated.

[0008]

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.

First Embodiment FIG. 1 is a schematic configuration diagram of an inner surface processing thin tube manufacturing apparatus according to a first embodiment of the present invention. This inner surface processing thin tube manufacturing device 1
In 00, 1 is an ion source, 2 is a mass spectrometric system for aligning the ion species and the number of charges of the ion beam, and 3 is a focusing / scanning system for irradiating / scanning the ion beam in a fine bundle. Reference numeral 4 denotes an extrusion molding machine having a tip at its tip, for extruding the thin tube P. 5 is a take-back machine. If the film is not formed with high quality, the mass spectrometry system 2 and / or the focusing / scanning system 3 may be omitted.

The material of the thin tube P is, for example, a polymer such as silicone rubber, polyurethane and silicone block polymer, polytetrafluoroethylene, polyvinyl chloride, polyethylene terephthalate, segmented polyurethane, polyethylene or polypropylene. The inner diameter of the thin tube P can be processed even if it is, for example, about 5 mm. Applications of capillaries are in the medical and food processing industries.

FIG. 2 is an enlarged view of the cross section of the extrusion molding machine 4. The cylinder 41 has a heater 42 on its outer periphery.
And a hopper 43. In addition, a hollow screw 44 is provided inside. Further, a cap 46 provided with a water jacket 47 is provided at one end. The hollow screw 44 is rotated by a motor 45. Further, the core 48 is held by a pin 49 at one end of the hollow screw 44. The other end of the hollow screw 44 is connected to the focusing / scanning system 3, the mass spectrometric system 2 and the ion source 1, and the inner space of the hollow screw 44 extends from the other end side of the hollow screw 44 to the focusing / scanning system. Scanning system 3,
It is in air-tight communication with the mass spectrometry system 2 and the ion source 1.

The material of the core 48 is a metal such as silver having antibacterial / sterilizing property, a ceramics such as hydroxyapatite having good biocompatibility, and functions as a target as described later.

Next, the operation will be described. First, the heater 42
The cylinder 41 is heated in advance, and the raw material P ′ is charged from the hopper 43. Next, the motor 45 drives the hollow screw 44.
Is rotated to transport the melted raw material P ′ toward the die 46. Then, the melted raw material P ′ is extruded from the gap between the die 46 and the core 48 while being cooled by the die 46, and becomes a thin tube P. Since the inner surface of the thin tube P and the core 48 are in close contact with each other, the inner space of the hollow screw 44 is
It communicates with the side, but is airtight with the outside. Therefore,
A vacuum exhaust system (not shown) provided on the ion source 1 side creates a high vacuum. In this state, the ion source 1
When the core 48 is irradiated with the ion beam IB from the core 4,
8 functions as a target, and the sputtered particles reach the inner surface of the thin tube P to form a film.

As the ions, inert gas ions such as argon, active gas ions such as oxygen, and molecular ions such as nitrogen gas can be used. The focusing / scanning system 3 electromagnetically shakes the ion beam IB to move the core 48
It is preferable to evenly scan the surface of the.

According to the above-described apparatus 100 for manufacturing the inner surface-treated thin tube, it is possible to continuously manufacture the thin tube P having a small diameter while performing the inner surface treatment. Further, since the film is formed by using sputtering, various kinds of high-performance and multi-function films can be obtained at high speed. Further, it can be manufactured in a clean environment, which is preferable in terms of hygiene.

-Second Embodiment- FIG. 3 is a schematic configuration diagram of an inner surface processing thin tube manufacturing apparatus according to a second embodiment of the present invention. This inner surface processing thin tube manufacturing device 2
In 00, 21 is a laser oscillator, and 22 is a focusing / scanning system for irradiating / scanning a laser in a fine bundle. Four
Is an extruder for extruding the thin tube P with a die at its tip. Reference numeral 5 is a take-up machine for the thin tube P. Capillary P
The material is a polymer such as silicone rubber, block polymer of polyurethane and silicone, polytetrafluoroethylene, polyvinyl chloride, polyethylene terephthalate, segmented polyurethane, polyethylene, polypropylene. Applications of capillaries are in the medical and food processing industries.

FIG. 4 is an enlarged view of the cross section of the extrusion molding machine 4. The cylinder 41 has a heater 42 on its outer periphery.
And a hopper 43. In addition, a hollow screw 44 is provided inside. Further, a cap 46 provided with a water jacket 47 is provided at one end. The hollow screw 44 is rotated by a motor 45. Further, the core 48 is held by a pin 49 at one end of the hollow screw 44. The other end of the hollow screw 44 is connected to the focusing / scanning system 22 and the laser oscillator 21, and the internal space of the hollow screw 44 is the hollow screw 44.
The focusing / scanning system 22 and the laser oscillator 21 communicate with each other from the other end side.

The material of the core 48 is a metal such as silver having an antibacterial / sterilizing property or a ceramic such as hydroxyapatite having good biocompatibility, and functions as a target as described later.

Next, the operation will be described. First, the heater 42
The cylinder 41 is heated in advance, and the raw material P ′ is charged from the hopper 43. Next, the motor 45 drives the hollow screw 44.
Is rotated to transport the melted raw material P ′ toward the die 46. Then, the melted raw material P ′ is extruded from the gap between the die 46 and the core 48 while being cooled by the die 46, and becomes a thin tube P. In this state, when the core 48 is irradiated with the laser beam LB from the laser oscillator 21, the core 48
Serves as a target, and the laser abrasion particles reach the inner surface of the thin tube P to form a film.

In the case of laser abrasion, it is not necessary to make the internal space of the hollow screw 44 a high vacuum.
Further, it is preferable that the focusing / scanning system 22 optically scans the laser beam LB to uniformly scan the surface of the core 48.

According to the above apparatus 200 for manufacturing the inner surface-treated thin tube, it is possible to continuously manufacture the thin tube P having a small diameter while performing the inner surface treatment. Further, since the film is formed by using abrasion, various kinds of high-performance and multifunctional films can be obtained at high speed. Further, it can be manufactured in a clean environment, which is preferable in terms of hygiene.

-Third Embodiment- FIG. 5 is a cross-sectional view of an essential part of an apparatus for manufacturing an inner surface treatment thin tube according to a third embodiment of the present invention. This inner surface processing thin tube manufacturing device 3
00 is to obtain an inner surface-treated thin tube by treating the inner surface of the thin tube P manufactured in another process. The target support rod 33 is attached to the upper lid 32 attached to the top of the processing tower 31.
Is inserted, and a target 34 is attached to the lower end of the target support rod 33. The target 34 is attached to the target support rod 33 by the lifting mechanism 35.
When is slid, it moves up and down inside the thin tube P.
The material of the target 34 is titanium, for example.

The thin tube P is held and hung by a chuck 36 provided on the bottom surface of the upper lid 32. 37
Is a guide for pressing and positioning the thin tube P. Capillary P
The material is stainless steel. The application of capillaries is cooling water pipes.

The bottom of the processing tower 31 is connected to the focusing / scanning system 3, the mass analysis system 2 and the ion source 1, and the internal space of the processing tower 31 has the focusing / scanning system 3, the mass analysis system 2 and It is in air-tight communication with the ion source 1.

Next, the operation will be described. After the thin tube P manufactured in another process is put into the processing tower 31, the processing tower 31 is sealed. Next, the target 34 is lowered to the lower end of the thin tube P. Next, the inside of the processing tower 31 is set to a high vacuum by a vacuum exhaust system (not shown) provided on the ion source 1 side. In this state, when the target 34 is irradiated with the ion beam IB from the ion source 1, the sputtered particles generate fine particles P.
To reach the inner surface to form a film. Molecular ions of nitrogen gas are used as the ions. If irradiation of the ion beam IB is continued while pulling up the target 34, a titanium nitride film can be formed on the inner surface of the thin tube P.

It is preferable that the ion beam IB is electromagnetically shaken by the focusing / scanning system 3 or the target 34 is axially rotated to uniformly scan the surface of the target 34.

According to the above apparatus 300 for manufacturing an inner surface-treated thin tube, the inner surface of the thin tube P having a small diameter manufactured in another process can be treated. Further, since the film is formed by using ion sputtering, various kinds of high-performance and multi-function films can be obtained. Furthermore, since the structure is simple, the device is inexpensive, and is useful for testing, research, manufacturing one product, and the like.

[0028]

According to the method and apparatus for manufacturing an inner surface-treated thin tube of the present invention, only the target is provided inside the thin tube, and the ion source and the laser oscillator are provided outside the thin tube. The inner surface can be preferably processed. Further, since the inner surface treatment of the thin tube is performed while molding the polymer material into the thin tube, the inner surface treated thin tube can be manufactured continuously and efficiently.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an inner surface processing thin tube manufacturing apparatus according to a first embodiment of the present invention.

FIG. 2 is an explanatory view in which a cross section of the extrusion molding machine in FIG. 1 is enlarged.

FIG. 3 is a schematic configuration diagram of an inner surface treatment thin tube manufacturing apparatus of a second embodiment of the present invention.

4 is an explanatory view in which a cross section of the extruder shown in FIG. 3 is enlarged.

FIG. 5 is a schematic cross-sectional view of an inner surface processing thin tube manufacturing apparatus of a third embodiment of the present invention.

[Explanation of symbols]

 100, 200, 300 Manufacturing equipment for inner surface treatment thin tube 1 Ion source 2 Mass spectrometric system 3 Focusing / scanning system 4 Extruder 5 Extractor P capillary 21 Laser oscillator 22 Focusing / scanning system 41 Cylinder 42 Heater 43 Hopper 44 Hollow screw 46 Clasp 47 Water jacket 48 Core (target) 49 pins

Claims (3)

[Claims] 1. A target is provided inside a thin tube, and the target is irradiated with an ion beam or a laser beam from outside the thin tube through the inside of the thin tube, and a film is formed on the inner surface of the thin tube by sputtering or abrasion. Production method. 2. An inner surface of a thin tube is provided by providing a target inside a thin tube of a polymer material having a predetermined diameter, irradiating the target with an ion beam or a laser beam from outside the thin tube through the inside of the thin tube, and by sputtering or abrasion. A method for producing an inner surface-treated thin tube, which comprises forming a film on the inner surface. 3. Extrusion molding means for extruding a molten polymer material from a gap between a die and a core to form a thin tube, and a space communicating the inside of the extrusion molding means from the core side to the anti-core side. The target provided on the core, and a beam irradiation means for irradiating the target with an ion beam or a laser beam through the space from the side opposite to the core of the extrusion molding means and forming a film on the inner surface of the thin tube by sputtering or abrasion. An inner surface treatment thin tube manufacturing apparatus characterized by the above.