JPH06307582A - Hose and manufacture thereof - Google Patents

Abstract

PURPOSE:To sharply improve wear resistance by a method wherein a texture of warps and wefts of which a jacket consists is not constrained by a cover and extremely soft as a hose. CONSTITUTION:A hose is formed such that the inner and outer surfaces of a jacket 2 formed by weaving warps 3 and wefts 4 in a cylindrical shape are covered with covers 5 and 6 formed of soft synthetic resin. In the hose, the cover 4 with which the inner surface of the jacket 2 is covered is adhered to only one the warp 3 and the weft 4. The cover 6 with which the outer surface of the jacket 2 is covered is adhered to only the other of the warp 3 and the weft 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose for fire fighting and the like, and in particular, the inner surface of the jacket is lined and the outer surface is also coated to prevent adhesion of dirt and water absorption and to be maintenance-free. It is about hoses.

[0002]

2. Description of the Related Art Conventionally, in a hose having a jacket lining, the outer surface of the jacket is coated with an emulsion of rubber or a flexible synthetic resin, or the surface of the hose is extruded and coated with rubber or a synthetic resin. Is applied to prevent dirt and water absorption.

[0003]

However, in the hose which has been subjected to the surface treatment, the rubber and the synthetic resin used for the surface treatment penetrate into the weave of the jacket and restrain the warp yarn and the weft yarn constituting the jacket. In order to
The hose becomes stiff.

For this reason, when the hose is bent with water in it, a so-called kink phenomenon occurs in which the hose locally bends at a steep angle.

Various studies have been made to secure the flexibility of the hose by making the rubber or synthetic resin used for the surface treatment flexible, but if the rubber or synthetic resin is used as the material, the strength is lowered. However, even if the rubber or the synthetic resin was softened, the flexibility of the hose was hardly improved.

The present invention has been made in view of the above circumstances, and it is possible to greatly improve the flexibility of the entire hose without making the surface-treated rubber or synthetic resin material more flexible than necessary. It is intended.

[0007]

The invention of claim 1 of the present invention is the invention of a hose, wherein the inner surface and the outer surface of a jacket formed by weaving warp threads and weft threads in a tubular shape are made of rubber or a flexible synthetic resin. In a hose that is coated with
The coating provided on the inner surface of the jacket is adhered only to one of the warp thread and the weft thread forming the jacket, and the coating provided on the outer surface of the jacket is adhered only to the other of the warp thread and the weft thread. To do.

The invention according to claim 2 is the invention of the first method for producing the hose, wherein the warp yarn is composed of filament yarn of synthetic fiber, and the whole or a part of spun yarn or filament of synthetic fiber is bulked. A weft yarn made of yarn is woven into a tubular shape with a woven structure in which a large amount of warp yarn is exposed on the outer surface and a large amount of weft yarn is exposed on the inner surface, and the outer yarn is almost exposed by increasing the density of the warp yarn. A jacket is formed, a tube of rubber or a flexible synthetic resin is adhered to the outer surface of the jacket via an adhesive to form a coating on the outer surface, and the inner surface of the jacket is filled with the rubber or synthetic resin at a temperature above its flow initiation temperature. It is characterized in that the coating on the inner surface is formed by contacting with the material at a temperature.

The invention according to claim 3 is the invention of the second method for producing the hose, wherein one surface of the warp thread and the weft thread is composed of an isocyanate compound, an epoxy compound, an ethyleneimine compound, an amine compound or RFL. A modified yarn is applied to a filament and heat-treated for a part or all of the yarn, and a spun yarn or synthetic fiber filament bulk processed yarn is used for the other yarn, and the warp yarn and the weft yarn are tubular. To form a jacket, and a reactive compound having a functional group that reacts with the surface modification treatment agent is added to one of the inner and outer surfaces of the jacket, and the melt viscosity is high and the flow starting temperature is high. Synthetic resin is pressed to form a coating at a temperature higher than the reaction temperature of the surface-modifying agent and the reactive compound, and the coating is formed on the other inner and outer surfaces of the jacket. A rubber or synthetic resin having a low melt viscosity and a flow initiation temperature sufficiently lower than the reaction temperature of the surface modification treatment agent is contacted at a temperature higher than the flow initiation temperature and lower than the reaction temperature of the surface modification treatment agent. To form a coating.

In the invention of the second method, the warp yarn and the weft yarn are tubularly woven by a weaving structure in which a large amount of the warp yarn is exposed on one of the inner and outer surfaces and a large amount of the weft yarn is exposed on the other to form a jacket. The surface of the jacket where a lot of yarns including the treated yarn coated with the surface-modifying treatment agent is exposed is coated with rubber or a flexible synthetic resin having a high melt viscosity and a high flow initiation temperature by adding the reactive compound. Formed,
A spun yarn or synthetic fiber filament made of rubber or synthetic resin having a low melt viscosity and a flow initiation temperature sufficiently lower than the reaction temperature of the surface modification treatment agent on the exposed surface of a large number of yarns It is preferable to form a coating.

FIG. 1 shows the hose of the present invention.
In the hose 1, 2 is a jacket, which is formed by weaving warp threads 3 and weft threads 4 into a tubular shape by a twill weave structure in which a large amount of the warp threads 3 is exposed on the outer surface.

An inner surface coating 5 and an outer surface coating 6 made of rubber or a flexible synthetic resin are formed on the inner surface and the outer surface of the jacket 2, respectively. The inner surface coating 5 constitutes the hose lining and the outer surface coating 6 is formed. Constitutes the surface treatment.

In the present invention, the inner surface coating 5 is bonded only to the weft thread 4 of the jacket 2, and the outer surface coating 6 is bonded only to the warp thread 3.

In FIG. 1, a gap is drawn between the inner surface coating 5 and the warp thread 3 on the inner surface side of the hose 1 and between the outer surface coating 6 and the weft thread 4. It only indicates that they are not bonded to each other, and does not indicate that there is a real gap here.

Therefore, there may be contact between the inner surface coating 5 and the warp thread 3 on the inner surface side of the hose 1 and between the outer surface coating 6 and the weft thread 4, but they are physically or chemically bonded to each other. No, it can be easily peeled off.

In the present invention, the weave design of the jacket 2 is not required to be a twill weave design, but as described above, the inner surface coating 5 is adhered only to the weft thread 4 and the outer surface coating 6 is applied only to the warp thread 3. Since they are bonded, it is preferable to adopt a structure in which the warp threads 3 are largely exposed on the outer surface of the jacket 2 as described above, in order to increase the bonding area and secure the adhesive force.

Further, as the woven structure of the jacket 2, it is possible to adopt a structure in which a large amount of the weft yarn 4 is exposed on the outer surface, and the inner surface coating 5 is bonded only to the warp thread 3 and the outer surface coating 6 is bonded only to the weft thread 4. However, it is preferable to arrange the weft thread 4 that bears the withstand pressure of the hose 1 inside as much as possible, and it is preferable that the weft thread 4 be configured as shown in the drawing.

Next, a method for manufacturing the hose 1 of the present invention will be described. In the first method, the warp yarns 3 of the jacket 2 are made of synthetic fiber filament yarns, and the weft yarns 4 are wholly or partially made of spun yarn or synthetic fiber filament bulking yarn.

The woven structure of the jacket 2 is woven by a woven structure in which a large amount of warp threads are exposed on the outer surface and a large amount of the weft threads 4 are exposed on the inner surface, and the density of the warp threads 3 is increased so that the weft threads 4 are almost formed on the outer surface. Weave so that it is not exposed.

Then, a tube of rubber or a flexible synthetic resin is adhered to the outer surface of the jacket 2 via an adhesive to form an outer surface coating 6, and the inner surface of the jacket 2 is covered with the rubber or the synthetic resin. The inner surface coating 5 is formed by bringing the inner surface coating 5 into contact with each other at a temperature equal to or higher than the flow starting temperature.

The concrete steps of this method will be described. First, the jacket 2 is woven with the inside and outside surfaces reversed, and a tube of rubber or synthetic resin whose surface is coated with an adhesive is inserted into the jacket 2 and heated under pressure. Inject fluid, heat and pressurize,
The tube is adhered to the jacket 2 with an adhesive.

Since the weft thread 4 is not exposed on the inner surface of the jacket 2, the tube is adhered only to the warp thread 3 without adhering to the weft thread 4.

After that, the jacket 2 is turned over and the coating on the inner surface of the jacket 2 is transferred to the inner surface to form the outer surface coating 6.

Then, a tube of rubber or synthetic resin having a low flow starting temperature is inserted into the jacket 2, a pressure fluid is fed into the tube, and is brought into pressure contact with the inner surface of the jacket 2.
Further, the tube is heated to a temperature higher than the flow starting temperature of the rubber or synthetic resin constituting the tube.

As a result, the rubber or synthetic resin forming the tube comes into contact with the inner surface of the jacket 2 in a fluid state.

At this time, since the weft yarn 4 of the jacket 2 is made of spun yarn or bulky filament yarn, the fluid rubber or synthetic resin is entangled with the fluff or loop of the weft yarn 4 and physically adhered thereto.

However, since the warp thread 3 is made of a synthetic resin filament thread, it does not entangle with the rubber or the synthetic resin and does not physically or chemically adhere to it, and the rubber or the synthetic resin adheres only to the weft thread 4 and the inner surface thereof. The coating 5 is formed.

Thus, by this method, the hose 1 in which the inner surface coating 5 is bonded only to the weft thread 4 on the inner surface of the jacket 2 and the outer surface coating 6 is bonded only to the warp thread 3 on the surface of the jacket 2 is obtained.

Next, an example of the second method of the present invention will be described. As the warp yarn 3 of the jacket 2, a treated yarn obtained by applying a surface-modifying treatment agent to synthetic fiber is used in part or in whole.

The surface modification treatment agent comprises an isocyanate compound, an epoxy compound, an ethyleneimine compound, an amine compound or RFL.

The isocyanate compound, polyglycidyl compound, polyethyleneimine compound and polyamine compound are compounds each having an isocyanate group, an epoxy group, an ethyleneimino group or an amino group, and RF
L is a compound obtained by adding a reaction product of resorcin and formalin to rubber latex, and each is a compound having high reactivity.

Examples of the blocked diisocyanate used as the surface modification treatment agent in the present invention include:

[0033]

[Chemical 1]

[Chemical 2]

[Chemical 3]

[Chemical 4]

[Chemical 5]

[Chemical 6]

[Chemical 7] And so on.

As the epoxy compound,

[0035]

[Chemical 8]

[Chemical 9]

[Chemical 10] However, as a polyethyleneimine compound,

[0036]

[Chemical 11] , And as a polyamine compound,

[0037]

[Chemical 12] And so on.

These surface modification treatment agents are applied to fibers,
When this is heated and fixed to the fiber, it exhibits high adhesiveness to a rubber or a flexible synthetic resin to which a reactive compound described later is added.

The reaction temperatures of these surface-modifying agents are as follows. Blocked diisocyanate compound About 140 ℃ or more Polyglycidyl compound About 135 ℃ or more Polyethyleneimine compound About 135 ℃ or more Polyamine compound About 140 ℃ or more RFL About 200 ℃ or more

As the weft yarn 4 of the jacket 2, spun yarn or synthetic filament high-bulk yarn is used. Then, the warp thread 3 and the weft thread 4 are woven in a tubular shape to form the jacket 2.

In this method, the twill weave design is preferably used as the weave design of the jacket 2 as described above, but it does not matter even if both the warp yarn 3 and the weft yarn 4 are exposed on both inner and outer surfaces.

The inner and outer surfaces of the jacket 2 are coated with rubber or synthetic resin. The rubber or synthetic resin with which the outer surface of the jacket 2 is coated is one to which a reactive compound having a functional group which reacts with the surface modification treatment agent is added and which has a high melt viscosity and a high flow initiation temperature.

As the reactive compound, the above-mentioned chemical formula 1, chemical formula 2,
The blocked diisocyanate compounds represented by Chemical formula 3, Chemical formula 4, Chemical formula 5, Chemical formula 6, Chemical formula 7, and the like, and the polyepoxy compounds represented by Chemical formulas 8, 9, and 10 are used.

Then, this rubber or synthetic resin is pressed against the outer surface of the jacket 2 at a temperature higher than the reaction temperature of the surface modification treatment agent and the reaction temperature of the reactive compound to coat the outer surface 6
To form.

As a result, the functional group of the reactive compound is
Surface modification treatment agent applied to warp yarn 3 and outer surface coating 6
By reacting with the functional groups in the rubber or the synthetic resin, the warp threads 3 and the outer surface coating 6 are chemically bonded.

At this time, since the surface modification treatment agent is not applied to the weft yarn 4, it does not react with the reactive compound added to the outer surface coating 6, and the rubber or synthetic resin of the outer surface coating 6 is not reacted. Has a high melt viscosity and a high flow starting temperature, so that it does not get entangled with the fluff or loop of the weft thread 4. Therefore, the weft thread 4 and the outer surface coating 6 are not strongly bonded chemically or physically.

Next, on the inner surface of the jacket 2, a rubber or a synthetic resin having a low melt viscosity and a flow initiation temperature sufficiently lower than the reaction temperature of the surface modification treatment agent is used. The inner surface coating 5 is formed by contacting at a temperature lower than the reaction temperature of the quality treating agent.

As a result, the inner surface coating 5 is entangled with the fluffs or loops of the weft yarn 4 made of spun yarn or bulk processed yarn, and is physically bonded. However, since the warp yarn 3 has no fluff or loop and the processing temperature of the inner surface coating 5 is lower than the reaction temperature of the surface modification treatment agent, the warp yarn 3 and the inner surface coating 5 are physically and chemically No adhesion occurs.

A concrete method of this method will be described. A warp yarn 3 is made of polyester filament yarn and a reaction temperature is 1
A yarn coated with a surface modification agent at 40 ° C. or higher is used. As the weft yarn 4, a bulky textured yarn of polyester or a yarn in which spun yarn and filament yarn are twisted together is used.

Then, the warp yarn 3 and the weft yarn 4 are woven with a twill weave design in which a large amount of the warp yarn 3 is exposed on the inner surface, and the jacket 2 is woven on the inner and outer surfaces in reverse.

A tube made of a thermoplastic polyurethane resin having a flow initiation temperature of about 160 ° C. and a melt viscosity of about 16000 cps, to which a blocked diisocyanate compound having a dissociation temperature of about 140 ° C. was added as a reactive compound in the jacket 2. Insert the tube and insert the tube for about 180
Heat the tube to ℃ and apply the internal pressure, then jacket the tube 2
Adhesive by pressure contact with the inner surface.

As a result, the blocked diisocyanate added to the polyurethane resin is dissociated to produce diisocyanate, which is combined with the surface-modifying agent and the polyurethane resin applied to the warp thread 3, and the warp thread 3 and the polyurethane resin are combined to form the diisocyanate. Chemically bond through.

On the other hand, the weft yarn 4 is not coated with the surface modification treatment agent, and since the melt viscosity of the polyurethane resin is high and the entanglement is unlikely to occur, the weft yarn 4 is not chemically or physically adhered to the polyurethane resin.

After that, the jacket 2 is turned over and the coating on the inner surface of the jacket 2 is transferred to the outer surface to form the outer surface coating 6.

Then, a tube made of a thermoplastic polyurethane resin having a flow starting temperature of about 120 ° C. and a melt viscosity of 8000 cps is inserted into the jacket 2, heated to about 125 ° C. and an internal pressure is applied to the inner surface of the jacket 2. To do.

As a result, since the polyurethane resin has fluidity and low melt viscosity, it is entangled with the fluffs or loops of the spun yarn or the bulk processed yarn of the weft yarn 4 and physically adheres to it. However, since the warp thread 3 has no fluff or loop and the processing temperature is lower than the reaction temperature of the surface modification treatment agent,
The inner surface coating 5 does not adhere to the warp thread 3 and the weft thread 4
Only glue with.

Therefore, by this method, the hose 1 in which the inner surface coating 5 is bonded only to the weft thread 4 on the inner surface of the jacket 2 and the outer surface coating 6 is bonded only to the warp thread 3 on the surface of the jacket 2 is obtained.

In this method, as the tube of polyurethane resin forming the inner surface coating 5, a tube having the above-mentioned characteristics as a whole can be used, but in order to increase the strength of the inner surface coating 5, the melt viscosity is more increased. It is also possible to use a two-layer tube in which an outer layer of a polyurethane resin having the above characteristics is formed on the surface of an inner layer of a polyurethane resin having a high flow initiation temperature.

In the above description, in the first and second methods, the jacket 2 is woven with the inner and outer surfaces reversed, the inner surface is coated, and then the inner surface is turned over to form the outer surface coating 6. Although it is stated that the inner surface coating 5 is formed on the inner surface, the present invention is not limited to this method.

In forming the inner surface coating 5 or the outer surface coating 6, the jacket 2 is passed through the head of the extruder, a tube of rubber or synthetic resin is extruded onto the outer surface of the jacket 2, and the tube is immediately extruded. It is also possible to make contact with the outer surface of No. 2 and adhere it to form a coating.

The coating formed on the outer surface of the jacket 2 by this method can be used as the outer surface coating 6 as it is, and after the coating, the jacket 2 is turned over and the inner surface coating 5 is formed.
Can also be

[0062]

In the hose of the present invention, only one of the warp thread 3 and the weft thread 4 constituting the jacket 2 is bonded to the inner surface coating 5, and the other is bonded to the outer surface coating 6, so that the warp thread 3 and the weft thread 4 are bonded together. Since the texture with 4 is not restricted by the coating and the texture can move freely, the hose becomes extremely flexible.

[0063]

According to the present invention, therefore, a hose having a coating on the surface of the jacket 2 does not impair the flexibility of the hose and is extremely easy to handle, and the hose is dragged. Sometimes it follows the unevenness of the ground because it is flexible, and it rubs against a wide area,
The wear resistance is greatly improved without being locally subjected to severe wear.

[0064]

【Example】

Example As the warp yarn 3, two 1000d polyester filament yarns and a 1000d polyester filament yarn were coated with a blocked diisocyanate compound (Chemical Formula 1) having a dissociation temperature of 180 ° C. and fixed by heating at 235 ° C. for 2 minutes. Using two twisted yarns with two treated yarns,
As the weft yarn 4, a yarn in which four 1000d polyester filament yarns and three 1000d polyester filament bulked yarns are mixed and twisted is used, and 142 warp yarns 3 are struck at 55 strokes / 100mm. Including,
A 2/1 twill weave structure having a large amount of warp threads 3 exposed on the outer surface was woven into a tubular shape to obtain a jacket 2 for a hose having an inner diameter of 65 mm.

The jacket 2 is passed through the head of an extruder, the flow starting temperature is 160 ° C., and the melt viscosity is 16000 cp.
A two-layer tube comprising an outer layer of the thermoplastic polyurethane resin of s and an inner layer formed by adding 2% by weight of blocked diisocyanate (Chemical Formula 2) to the same polyurethane resin as the outer layer is extruded at a temperature of 180 ° C. An outer surface coating 6 was formed on the surface of the jacket 2.

Next, in the jacket 2, an outer layer of thermoplastic polyurethane resin having a flow starting temperature of about 130 ° C. and a melt viscosity of about 7500 cps, and a flow starting temperature of about 178 ° C.
Then, insert a two-layer tube consisting of an inner layer of polyurethane resin with a melt viscosity of about 30,000 cps into the tube, and send pressurized steam of ² kg / cm ² (about 130 ° C) into it and heat and press for about 2 minutes. The tube was adhered to the inner surface of the jacket 2 to form the inner surface coating 5.

Comparative Example 1 A polyurethane resin emulsion was applied to the surface of the jacket 2 of the above example to form an outer surface coating. The inner surface coating 5 was formed as in the example.

Comparative Example 2 The jacket 2 of the above example was passed through the head of an extruder, and the same thermoplastic polyurethane resin used for the inner surface coating 5 was extruded at 150 ° C. to form an outer surface coating on the surface of the jacket 2. The outer surface coating 6 was formed as in the example.

Adhesive Strength A strip having a width of 38 mm was cut out in each of the vertical direction and the transverse direction of the hose 1 of the example and the comparative example to obtain a test piece, and the adhesive force between the jacket 2 and the inner surface coating 5 and the outer surface coating 6 was measured. did.

The measurement results are shown in Table 1.

[0071]

[Table 1]

Evaluation of Feeling Regarding the hoses obtained in Examples and Comparative Examples, the flexibility was judged by touch, and in the Examples of the present invention, they were extremely flexible and supple and did not have the outer surface coating 6. Although the texture was almost the same as that of the hose, Comparative Examples 1 and 2
All had a hard and rugged texture.

Abrasion resistance The hoses obtained in Examples and Comparative Examples had a length of 5 m.
The amount of water corresponding to 80% of the internal volume was sealed in the hose of, and the hose was dragged over the concrete, and the dragging distance until water started to leak due to a hole in the hose was measured.

As a result, in the hose of the embodiment of the present invention, water leakage did not occur even after being dragged by about 60 m, but in Comparative Example 1 it was about 20 m and in Comparative Example 2 it was about 31 m. Has begun.

[Brief description of drawings]

1 is a cross-sectional view of a part of the hose of the present invention 1 hose 2 jacket 3 warp yarn 4 weft yarn 5 inner surface coating 6 outer surface coating

Claims (4)

[Claims] 1. A jacket (2) formed by weaving a warp thread (3) and a weft thread (4) in a tubular shape, and coating inner and outer surfaces with a coating (5, 6) made of rubber or a flexible synthetic resin. In the hose, the coating (5) applied to the inner surface of the jacket (2) adheres to only one of the warp thread (3) or the weft thread (4) constituting the jacket (2) and is applied to the outer surface of the jacket (2). Hose characterized in that the applied coating (6) adheres only to the other of the warp thread (3) or the weft thread (4). 2. A warp yarn (3) made of a filament yarn of a synthetic fiber, and a weft yarn (4) made by using a spun yarn or a bulky processed yarn of a synthetic fiber filament in whole or in part.
The weaving structure in which a large amount of the warp threads (3) is exposed on the outer surface and a large amount of the weft threads (4) is exposed on the inner surface is formed into a tubular shape, and the outer weft threads (4) are formed by increasing the density of the warp threads (3). A jacket (2) that is barely exposed is formed, and a tube of rubber or a flexible synthetic resin is adhered to the outer surface of the jacket (2) through an adhesive to form a coating (6) on the outer surface. 2.) A method for producing a hose, characterized in that the inner surface of (5) is contacted with rubber or a synthetic resin at a temperature not lower than its flow initiation temperature to form a coating (5) on the inner surface. 3. A treatment in which one surface of the warp yarn (3) and the weft yarn (4) is coated with a surface modification treatment agent comprising an isocyanate compound, an epoxy compound, an ethyleneimine compound, an amine compound or RFL on a filament and heat treatment. A yarn is used for a part or all of the yarn, and a spun yarn or synthetic fiber filament bulking yarn is used for the other yarn, and the warp yarn (3) and the weft yarn (4) are woven in a tubular shape to form a jacket (2). Then, to one of the inner and outer surfaces of the jacket (2), a reactive compound having a functional group that reacts with the surface modification treatment agent is added, and rubber or a flexible synthetic resin having a high melt viscosity and a high flow initiation temperature is used. The surface modification treatment agent and the reactive compound are pressed against each other at a temperature higher than the reaction temperature to form a coating (5, 6), and the other inner and outer surfaces of the jacket (2) have a low melt viscosity and A rubber or synthetic resin having a flow initiation temperature sufficiently lower than the reaction temperature of the surface modification treatment agent is contacted at a temperature higher than the flow initiation temperature and lower than the reaction temperature of the surface modification treatment agent to coat (5 , 6) are formed. 4. The warp thread (3) and the weft thread (4)
A jacket (2) is formed by weaving in a tubular shape with a weave design in which a large amount of warp yarn (3) is exposed on one of the inner and outer surfaces and a large amount of weft yarn (4) is exposed, and a surface modification treatment agent for the jacket (2). A coating (5, 6) made of rubber or a flexible synthetic resin having a high melt viscosity and a high flow initiation temperature is formed on the surface of a large number of exposed yarns including the treated yarn coated with A spun yarn or synthetic fiber filament made of rubber or synthetic resin having a low melt viscosity and a flow initiation temperature sufficiently lower than the reaction temperature of the surface modification treatment agent on the exposed surface of a large number of yarns Method for producing a hose according to claim 3, characterized in that a coating (5, 6) is formed.