JPH0475044B2 - - Google Patents

Description

[Detailed Description of the Invention] ``Object of the Invention'' The present invention relates to the creation of a tubular material, which improves the overperformance of a continuous porous tube molded product and improves its strength, making it possible to overtreat under high pressure conditions. The purpose is to provide a conditioned tubular material.

Industrial applications A tubular material used in the mechanism.

Conventional technology The use of tubular materials in various types of filtration machines has been practiced in various ways.
Further, the use of tubes having a continuous porous structure as such a tubular material has been repeatedly studied in various fields in order to mass-produce the tubular material.

Problems to be Solved by the Invention However, in the conventional tubes as described above, even if they are formed as continuous porous tubes and can be mass-produced to a certain extent, sufficient strength in the circumferential direction cannot always be obtained. Therefore, there are some restrictions on its use. In addition, there is a limit to the fineness of the porous structure that can be obtained in tube molded bodies with such a porous structure.On the other hand, in recent years, the requirements for the precision of this type of permeation mechanism have become more and more severe, and it has become difficult to obtain fine particles of 1 μm or less. In many cases, highly accurate separation is required, and it is not possible to respond effectively and quickly to such overpurposes.

``Structure of the Invention'' Means for Solving the Problems The present invention was devised after repeated studies to solve the problems of the conventional products as described above. A continuous porous resin film formed into a film shape from polytetrafluoroethylene resin is wrapped around the entire outer peripheral surface of the continuous porous resin tube, and the tube serves as a support carrier for the film and also as a preliminary membrane member. The tubular material is characterized in that the above-mentioned film achieves the desired overperformance and also improves the strength of the tube.

Function The continuous porous resin tube is obtained through mass production and structurally functions as a carrier for the film, allowing the continuous porous resin film to be formed and coated in a uniformly expanded state. In addition to being the main cause of overaccuracy, the tube also acts as a preliminary overaccuracy. Furthermore, in terms of strength, the film reinforces the strength of the tube in the circumferential direction, and by exerting these working relationships, a tubular material having excellent properties is produced.

EXAMPLE To explain a specific embodiment of the present invention as described above as shown in the attached drawings, a continuous porous synthetic resin tube 11 made of polytetrafluoroethylene resin and tube-molded as shown in FIG. The outer surface is wrapped and covered with a continuous porous synthetic resin film 12 similarly formed into a film shape made of polytetrafluoroethylene resin. That is, even if the tube 11 and the film 12 are manufactured from materials with the same composition, their specific porous structures are different due to the difference in tube molding technology and film molding technology. When resin is used as a tube material, the excessive grain size in the porous structure is generally around 1 μm.
Similarly, when polytetrafluoroethylene resin is used as a raw material and stretched into a film, the thickness is 0.1 μm, and in some cases 0.02 μm due to the web-like microstructure created by the stretching process.
The following ultrafine particles can also be effectively captured. Regarding its strength, tube 11
is generally low in the circumferential direction, and therefore tends to lack pressure resistance, but the film 12 has fewer such defects. Especially this film 1
2 is prepared in the form of a tape and is wound and wrapped continuously around the circumferential surface of the tube 11 in a spiral manner as shown in the figure. Therefore, the strength of the tubular body in the circumferential direction is significantly improved.

As mentioned above, the tubular filter using the tube 11 and film 12 made of the same polytetrafluoroethylene resin has excellent chemical resistance and heat resistance, and it is also easy to melt-bond the film 12 to the tube 11. And,
This also makes it possible to obtain materials of excellent quality.

The film 12 wound spirally around the porous tube 11 made of polytetrafluoroethylene resin as described above has not only the above-mentioned strength but also appropriate flexibility and flexibility. It is possible to obtain a mechanism that is arranged in a bent manner. That is, an example of a mechanism according to the present invention bent into a coil shape as described above is shown in FIG. By being spirally wound and attached to the central axis 2 of the mechanism, an effective mechanism with a large overarea is formed with a small number of members. In other words, the tubular material 6 whose strength has been increased by winding the film 12 as described above can withstand the winding as shown in FIG. This is suitable for inserting the end of the tubular material 6 into the through hole 13 and firmly fixing it with a stepped hole plug 9 or the like.

``Effects of the Invention'' According to the present invention as explained above, a continuous porous resin film also formed by polytetrafluoroethylene is applied to the entire outer peripheral surface of a continuous porous resin tube formed into a tube by polytetrafluoroethylene. By coating, a highly precise coating is obtained with a resin film having a common microstructure, and the tube in this case forms a suitable tubular configuration as a carrier for the film, and the film is By preparing a preliminary strain against the over-effect caused by the film, clogging and clogging in the film layer can be avoided and over-treatment can be carried out for a long period of time, and the strength of the tube as described above can be strengthened by the film. This invention provides a material with high durability and can withstand harsh usage conditions, and also enables mass production of tubular materials, making it an industrially highly effective invention.

[Brief explanation of the drawing]

The drawings illustrate embodiments of the invention,
FIG. 1 is a partially cutaway side view showing one embodiment of the tubular material according to the present invention, and FIG. 2 is a partially cutaway side view showing one embodiment of the tubular material according to the present invention. In these drawings, 1 is an end plate, 2 is a central shaft, 6 is a tubular material, 11 is a continuous porous synthetic resin tube, and 12 is a continuous porous synthetic resin film.

Claims (1)

[Claims] 1. A continuous porous resin tube molded from polytetrafluoroethylene resin is covered with a continuous porous resin film also molded into a film shape from polytetrafluoroethylene resin by wrapping the entire outer peripheral surface of the tube. . A tubular material, characterized in that the tube serves as a support carrier for the film and also as a preliminary overpass member, and the film provides desired overperformance and improves the strength of the tube. 2. The tubular material according to claim 1, wherein the continuous porous resin film has fine continuous pores having a filter function capable of removing fine particles of 0.1 μm or more. 3. The tubular material according to claim 1, wherein a continuous porous resin film formed into a tape shape is coated in a spiral manner.