JPS6018331A - Method for manufacturing flexible composite hose - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Background and Objects of the Invention] The present invention relates to a method for manufacturing a flexible composite hose, and more specifically, a method for manufacturing a flexible composite hose, in particular a method of manufacturing a flexible composite hose using a plastic chip for the inner layer and a vulcanized rubber outer layer with a l'u Iff reinforcing layer. and the inner layer are joined! The present invention relates to a method for manufacturing a flexible composite hose.

A so-called rubber hose is well known, which is a flexible hose having two inner and outer layers 41-1 made of vulcanized rubber with a fiber-reinforced layer if necessary. Similarly, as is well known, when the hose of this scale is used for transporting paint, for example, the inner layer rubber swells considerably due to the solvent contained in the paint, and its strength decreases. For this purpose, there are rubber hoses whose inner layer is made of a highly solvent-resistant material, such as diocol rubber, but depending on the type of solvent used, problems similar to those described above may occur, and the odor thereof poses a practical problem.

From the viewpoint of solvent resistance, it is conceivable to use a plastic material for the inner layer, but plastic materials generally have high rigidity, and as a result, the flexibility of the hose is notoriously low. -1. Furthermore, when the inner layer of PlusDeck is used, a new problem arises in which the outer rubber layer contacts.

Honkomei 1q is a plastic inner layer that solves the above problems.
A flexible composite hose with two layers of vulcanized rubber outer layer was developed.

The inner layer of the composite hose, which has an inner layer of plus deck and an outer layer of vulcanized rubber, is manufactured using a mandrel as necessary or by direct extrusion molding. (A composite hose is manufactured by forming a reinforcing layer on the thus-produced jacket and extruding rubber on top of it. However, the above method (in case of premature ejaculation) It is impossible to make the wall thickness of the groove (f, 'h'fj, L), and it is extremely difficult to uniformly extrude a thin-walled tube. As long as the inner layer is used, the thickness of the inner layer must be sufficiently large.
Therefore, it is difficult to obtain the desired flexibility.

In order to improve this point, it has been considered to form the inner WQ plus J to Tsukuti 2-b and the outer layer rubber into a bellows shape to obtain C flexibility 11, but this J, sea urin (1, 1, j The hose obtained by this method obtains flexibility by buckling the inner and outer layers, but it cannot be used for long periods of time in applications that require J0 resistance. Something that makes it impossible to manufacture long hoses.

It is an object of the present invention to provide a method for manufacturing a highly flexible composite hose with an inner layer of extremely thin plastic tubes.

1 Summary of the Invention According to the present invention, a thin plastic tape is placed on a mandrel without any gaps, and then placed in a heating bath.
The above objectives are coupled by forming a seamless tube.

In the present invention, the inner layer plus deck tape material O) 1
Any material that can be molded into a tape shape and that can be formed into a seamless tube by heating bath E (11) is acceptable, and includes thermoplastic elastomer and block-1 polymer, but as a hose. The material may be nylon, thermoplastic polyurethane, thermoplastic 'It b5, polynysdel, J2 vinyl silicide, polyethylene, polypropylene, or mixtures thereof.

These Shirasudek coatings can contain small amounts of solvents and antiblocking agents necessary for manufacturing the tape, or carbon black and pigments for shielding color. J.
For other uses, carbon black, metal fibers, metal flakes, or metal particles can be used to impart conductive properties.

In addition, the heating temperature for heating and melting a plastic tape to take a thin tube (C) depends on the material used, but for example, a polyamide copolymer (0 - When using a tape made of 7-component polymers of Neuron, 12-nylon, 6-6-nylon, etc.) or adipate-based thermal 1i1q (Ji31 polyurethane (manufactured by Jin Nippon Ink Co., Ltd., M product name: Bandex, T-5167, etc.) This is extremely advantageous because the heat generated in the vulcanization process (13°C to 160°C) after the extrusion coating of the outer layer rubber can be used directly to melt it.Also, the monthly yield of the outer layer rubber is Alternatively, synthetic rubber Q't 4-r can be used.

In the present invention, a plastic tape is provided on a mandrel by spiral wrapping or vertical wrapping, and then placed in a heating bath 1'. c. Form a seamless tube. In this case, the heat source can be heated air, an infrared heater, a frequency induction heater, or any known means can be appropriately selected. Furthermore, by using the heat source in the vulcanization process of the outer layer, it is possible to prevent deterioration of the plastic due to contact with the outside air and to make effective use of the layer (once again, it is advantageous).

The covering mandrel used in the present invention can be a rod or pipe made of aluminum or copper, or a so-called nylon mandrel. Furthermore, mold release treatment such as application of silicone oil or the like to facilitate the removal of the lifting platform and mandrel for manufacturing long hoses is self-evident.

[Example] The present invention will now be described in detail based on examples.

Example I Table 11! Heat 10 plastic polyester clay film with a temperature of 170°C
), I used a tape with a thickness of 0.2mm and a width of 50#, and removed it. R19.0m stainless steel pipe" 2nd edge or 2nd
〜j3111111 Spiral taping so that it overlaps with the seaweed wrapper (), and on top of that, 1500 ml of aromatic polyamide binding string (1) upont (product name: Kevlar fiber) with 3 water retention and JU included (later). 33. A braided layer of 5 was prepared and heated in a Δ-bun at 170°C for 10 minutes.
A seamless inner layer was formed. Extrude the 11J blend rubber mixture onto this inner layer tube and make the outer diameter 32mm.
It was extrusion coated to 1M+ and steam vulcanized at 150° C. for 45 minutes (a composite hose was obtained).

Example 2 A binary]ξpolymerized borinamide resin having a melting temperature of 90 to 120°C (Daicel Chemical Engineering Co., Ltd., Gino, trade name Diamid Film 3000) was prepared in 1930, 07! 5mm wide and 50mm wide, wrap it around a nylon mandrel with an outer diameter of 19.0mm, and
On top of that, 1,200 denominations of vinylon JIV lll
The chloroprene mixture was extruded and coated so that the outer diameter was 32.0 mm.

This was steam pressure vulcanized at 150° C. for 4.5 minutes to obtain a composite hose.

Example 3 1) 11 points were made of thermoplastic urethane elastomer (contains 8 pieces of Ink Co., Ltd.) at approximately 120°C under the trade name of Bandex.
5167> with a thickness of 0.3 mm and a width of 60 mm.
(Then, wrap this vertically on a 9.0mm knife mandrel, wrap it vertically from the opposite direction with a similar tape covering the seam, and then wrap it vertically on a 9.0mm knife mandrel. As in case 2, use the reinforcing braid in step t). - Extrude the chloroprene mixture onto the V (J L
/ 1 b Vulcanize at O'C for 15 minutes to make a composite hose of 1 q.

Example/) Polyamide tj of Example 2
Noamide resin/;i,7. i ijJ Rough polyurethane elastomer laminated tape was used. The polyamide resin of the IL'1 layer tape was the same as in Example 2.
Same 4. J J'i+) LA Sake people 0,
07'6mm and 0,1# and width is 550mm
And/-6 Using this laminated houb, I
I got a composite hose from 'l 2 and IIJj.

Comparative Example 1 1200 denier vinylon m on an extruded nylon tube with an inner diameter of 19.0 mm and an outer diameter of 20.28+ m
Braid the U with three strands, and then extrude and cover with the same black] l blend rubber mixture as in the example so that the outer diameter is 32.0 mm.
A hose was obtained by vulcanization at 150° C. for 5 minutes.

Comparative Example 2 An intermediate vinylon fiber braided reinforcing layer was provided using the same chrome rubber mixture as used in the example.Inner diameter 19.0
mm, outer diameter 32 mm, 0 mtn f-]--b was vulcanized at 150°C for 45 minutes to make a rubber hose of 1r7k.

The minimum bending radius and 1F strength of Example J3 and Comparative Example were measured for 13-(1!'7).The results are shown in Table 1.

Table 1 As is clear from Table 1, the visibility of the hose of the present invention is the same as that of Comparative Example 2 rubber hose.
A value greater than 'jr/cut can be secured for oo. This is due to the fact that the thickness of the inner plastic duplex can be made sufficiently small.

Furthermore, the outer rubber layer and each layer of silk were removed from the composite hose of the present invention, and the inner layer was observed. However, no defective welding between jumps or small pins could be observed. In addition, it was found that the tube wall thickness varied in both directions, length and horn direction, and there were small variations.Furthermore, the tensile strength of the fused part was L41;
5% or more, it can be said that a completely seamless duplex is formed.

[Effects of the Invention] According to the present invention as described above, a composite hose having a thin 11ηf-1-b inside the plus book, which cannot be obtained by conventional extrusion molding, can be obtained. (2) Not only is the conventional expensive extrusion molding equipment for plastics unnecessary, the +iJ deflection of the resulting composite hose is similar to that of a conventional rubber hose, and it also has lightning resistance that cannot be obtained with a conventional rubber hose. Various properties such as hot gas barrier properties
Ru. Further, according to the present invention, it is easy to manufacture a long pitching hose.

CA-

Claims (6)

[Claims] (1) Inner layer made of plastic tube and extruded outer layer made of vulcanized rubber1? η and a string reinforcing layer that mechanically firmly connects these inner and outer layers.
Place the mandrel on the right side of the specified outer diameter with plastic tape so that there are no gaps)
and forming the plastic tape into a seamless tube by heating and melting to form and cover the inner layer. (2) The plastic tape is applied onto the mandrel by spiral wrapping with overlapping edges. Manufacturing power V. (3) The flexible composite boce according to claim 1 is characterized in that the plus deck tape is provided by vertically applying it on the mandrel so that the edges thereof overlap. Manufacturing jj method. (4) A method for manufacturing a flexible composite hose according to claim 1 or 21, wherein the plus deck is made of nylon, polyurethane, or a laminate thereof. (5) The heating and melting of the plastic deck is carried out by heating the step number and the edge of the plastic tape on the mandrel. A method for manufacturing a flexible composite hose described in 1 of Jfj. (6) The heating λ() melting of the plus deck tape was performed before h1
The manufacturing capability of a flexible composite hose according to any one of Items 1 to 4Jn of Claim 1111, characterized in that the vulcanization is carried out at the same temperature as the vulcanization of the outer layer.