Plastic hose with fabric reinforcement

Abstract

Plastic hose (5), comprising: - a hose wall (8) made of plastic, - a tissue reinforcement (2), and - a reinforcement (4) made of plastic or metal, wherein the reinforcement (4) has a higher stiffness than the hose wall (8), - wherein the hose wall (8) is made from one or more spirally wound plastic strips (1), and - wherein the reinforcement (4) is integrated into the plastic strip (1, 1'), characterized in that the fabric reinforcement (2) comprises crosswise superimposed threads (3, 3', 3") and / or crosswise woven threads (3, 3', 3") and that the plastic tube (5) is characterized by a thread reinforcement (9) comprising at least one axially extending thread, wherein the axial thread reinforcement (9) is continuous over the entire length of the tube (5) and wherein the axial thread reinforcement (9) runs parallel to the central axis of the tube (5).

Description

[0001] The invention relates to a plastic hose comprising: a hose wall made of plastic, and a fabric reinforcement.

[0002] Numerous different types of hoses are known in the field of hose technology. Due to its advantageous material properties, plastic is frequently used in hose manufacturing. Such hoses are referred to as plastic hoses or all-plastic hoses. Some of these hoses are reinforced with threads, yarns, or fabrics. These are often hoses made of several extruded layers with the reinforcement sandwiched between them.

[0003] A high-pressure hose is known, for example, from DE 24 29 680 A1. The hose comprises an extruded inner hose which is wrapped with a reinforcement of cross-linked nylon fiber strands by a wrapping device. Subsequently, an extruded outer jacket is drawn over the inner hose and the reinforcement, so that the reinforcement is located between the inner hose and the outer jacket. The reinforcement is bonded to the inner hose and the outer jacket by means of adhesives.

[0004] Reinforcement increases the hose's radial stiffness. This prevents excessive expansion of the hose under high internal pressure. Furthermore, high radial stiffness ensures a constant cross-sectional area and prevents kinking. However, a disadvantage of the hose shown in DE 24 29 680 A1 is that the axial stiffness, i.e., the hose's longitudinal stiffness, can only be increased slightly.

[0005] This is due to the fact that the nylon fiber strands of the reinforcement run at an angle to the longitudinal direction of the hose. Furthermore, extruded hoses have the disadvantage that the cross-sectional shape and area cannot be varied along the length of the hose, meaning that hoses with a corrugated surface – for example, due to reinforcement – ​​cannot be produced.

[0006] A hose with improved reinforcement is known, for example, from DE 43 24 973 A1. The essential difference to the hose described above is that, in addition to the two cross-shaped reinforcing threads, approximately axially oriented reinforcing threads are also provided. These additional reinforcing threads are to be applied in a symmetrical wave pattern parallel to the longitudinal axis.

[0007] The approximately axially oriented reinforcing threads increase the stiffness of the hose in the axial direction. This has the advantage that the hose can withstand higher tensile loads without excessive stretching. However, a disadvantage of the hose known from DE 43 24 973 A1 is the inherent limitation of extrusion processes to varying the cross-sectional shape or area of ​​the hose.

[0008] US Patent 4,459,168 A discloses a method and a device for forming a wire-reinforced hose. US Patent 3,739,815 A discloses a flexible hose assembly. DE 10 2006 019 562 A1 describes a hose assembly provided with a reinforcing element, as well as a method and a device for its manufacture.

[0009] The invention is therefore based on the objective of designing and further developing a plastic hose mentioned at the outset and described in more detail above in such a way that the cross-sectional shape or area of ​​the hose and in particular the thickness of the hose wall can be varied in a simple manner.

[0010] This problem is solved by a plastic hose according to claim 1.

[0011] The plastic hoses according to the invention initially comprise a hose wall and a fabric reinforcement. The hose wall is made of plastic, in particular a thermoplastic material. TPU (thermoplastic polyurethane), PVC (polyvinyl chloride), TPE (thermoplastic elastomers), or PE (polyethylene) have proven particularly effective. The use of plastics is characterized by variable shaping, high flexibility, low weight, and low cost. A fabric reinforcement is understood to be a reinforcement consisting of several threads or yarns in contact with each other. These threads can, for example, be laid loosely on top of one another or woven or braided together. The fabric reinforcement serves the purpose of increasing the stiffness of the hose wall so that the hose does not experience excessive expansion even under high internal pressures.Polyamide or polyester yarn have proven particularly effective as materials for yarn reinforcement.

[0012] For some applications, it is desirable or necessary to vary the hose wall thickness. For example, a spiral reinforcement may be required within the hose wall. To save material and weight, however, the hose wall should only be thicker on the outer surface in the area of ​​the reinforcement; the inner surface should be as smooth as possible to avoid increasing flow resistance. Another reason for varying wall thicknesses can be the combination of desired properties such as high flexibility and compressibility (thin wall sections) and high stiffness (thick wall sections).

[0013] According to the invention, by manufacturing the hose wall from one or more spirally wound plastic strips, the desired variation in hose wall thickness can be easily achieved. The hose wall thickness can be varied, in particular, by changing the cross-sectional shape of the plastic strips. The invention is therefore based on the idea of ​​not extruding the fabric-reinforced hose itself, but rather first extruding a plastic strip and reinforcing it with a fabric. Additionally, reinforcements made of plastic or metal can be integrated into the plastic strip during the extrusion process. Subsequently, a hose is formed from the fabric-reinforced and, if applicable, reinforced plastic strip by spiral winding and welding or bonding. This approach allows for the production of hoses with more complex structures than is possible using extrusion methods.Preferably, the hose wall is made exclusively from one or more spirally wound plastic strips and, in particular, has no further unwound layers or plies. Such a hose is also referred to as a "wound hose" due to the spiral winding of plastic strips; a method for its manufacture is described, for example, in DE 198 48 172 A1.

[0014] One embodiment of the invention provides that the fabric reinforcement is integrated into the hose wall. Integrating the fabric reinforcement into the hose wall has the advantage that the reinforcement is particularly firmly bonded to the hose and cannot detach from it. Furthermore, an integrated fabric reinforcement is particularly well protected from environmental influences and abrasion by the surrounding hose wall.

[0015] In a further embodiment of the invention, an inner layer is provided that extends over the entire inner surface of the hose. This inner layer is also referred to as an "inliner" and is in direct contact with the material being conveyed through the hose. Due to the friction of the conveyed material against its inner surface, the inner layer of the hose is subject to particular demands. Therefore, the inner layer can be made of a particularly abrasion-resistant material. Furthermore, the inner layer is responsible for the hose's tightness, so particularly gas- and liquid-tight materials can be used for this layer. It is intended that the inner layer extends over the entire inner surface of the hose. In other words, the inner layer should cover the entire inner surface of the hose.This has the advantage that the entire surface in contact with the conveyed material exhibits the same desired properties. The inner layer can be made of TPU (thermoplastic polyurethane), PVC (polyvinyl chloride), TPE (thermoplastic elastomers), or PE (polyethylene). For flow-related reasons, the inner surface of the inner layer is preferably smooth.

[0016] Regarding the inner layer, it is further proposed that it be made from one or more spirally wound plastic strips. The spiral structure of the inner layer offers the same advantages previously described for the hose wall, which is also spirally constructed. The inner layer can be manufactured in the same way as the hose wall, specifically by winding and welding or bonding the plastic strips. For flow-related reasons, even with an inner layer made by winding plastic strips, a smooth inner surface is desirable.

[0017] According to a further aspect of the invention, it is proposed that the plastic strip forming the hose wall and / or the inner layer has overlapping edge regions which are bonded together in the overlap area. This bond can be achieved, in particular, by adhesive bonding and / or welding. A bond ensures a particularly reliable seal at the seam.

[0018] According to a further embodiment of the invention, the thickness of the inner layer is less than the thickness of the hose wall. In particular, the inner layer can have a thickness of 1 mm or less, especially 0.5 mm or less. A particularly thin inner layer saves costs, since very high-quality plastics are regularly used for the particularly stressed inner layer, which are more expensive than conventional plastics used, for example, for the hose wall. Furthermore, thin inner layers minimize any alteration or impairment of the hose's mechanical properties, which are primarily determined by the hose wall and the reinforcement.

[0019] In a further embodiment of the invention, it is proposed that the fabric reinforcement be arranged between the tube wall and the inner layer. This arrangement simplifies the manufacturing process, as the fabric reinforcement does not need to be integrated into either the tube wall or the inner layer.

[0020] According to the invention, the mechanical properties of the hose are improved by a reinforcement made of plastic or metal, wherein the reinforcement has a higher stiffness than the hose wall and / or the inner layer. A reinforcement is understood to be a strengthening of the hose that increases its stiffness—that is, its resistance to deformation. The increased stiffness compared to the hose wall can be achieved by making the reinforcement from a different plastic than the hose wall or from metal. Alternatively, the hose wall and the reinforcement can also be made of the same plastic but contain different additives to achieve different mechanical properties. Reinforcements made of metal, especially steel, have the advantage of particularly high stiffness; they can also dissipate electrical charges and thus equalize electrical charge concentrations.The reinforcement can be spiral or ring-shaped, for example, and thus wrapped around the hose. In particular, the reinforcement can run spirally or ring-shaped around a central axis extending along the longitudinal direction of the hose. Such reinforcement has the advantage of increasing the hose's stiffness in the radial direction, so that the hose's cross-sectional shape—preferably round—is maintained in the reinforced area. At the same time, spiral or ring-shaped reinforcement only minimally or not at all increases the bending stiffness, so that a hose with such reinforcement can still be bent and laid in curves. A further advantage of spiral or ring-shaped reinforcement is that the hose can be compressed longitudinally. The thickness or diameter of the reinforcement can range from 0.5 mm to 5 mm.

[0021] With regard to the arrangement of the reinforcement, a further development of the invention proposes that the reinforcement be arranged between the overlapping edge regions of the plastic strip. This can be, in particular, the plastic strip that forms the hose wall. This arrangement protects the reinforcement from environmental influences, thereby reducing, for example, the risk of corrosion. In particular, the reinforcement can be arranged in a cavity that forms between the overlapping edge regions of the plastic strip. The cavity allows for a defined arrangement and positioning of the reinforcement. Furthermore, the arrangement in the cavity provides particularly good protection against environmental influences for the reinforcement. The cavity can be created, for example, by two parallel, spaced-apart welds or adhesive seams.

[0022] According to the invention, the reinforcement is integrated into the plastic strip. This can also refer specifically to the plastic strip that forms the hose wall. Integration of the reinforcement can be achieved by incorporating it into the plastic strip during extrusion. This has the advantage that the reinforcement no longer needs to be added during welding of the plastic strip, but is already present within it.

[0023] Another alternative involves placing the reinforcement on the outer surface of the hose, specifically on the outer surface of the hose wall. In this variant, the reinforcement is not completely enclosed by the plastic strip forming the hose wall, but rather applied to the outside of the hose wall. This has the advantage that the reinforcement can even be applied to a hose that has already been welded.

[0024] According to a further embodiment of the invention, the fabric reinforcement comprises threads laid crosswise and / or threads woven crosswise. Laying the threads crosswise has the advantage of being easy to manufacture. For example, a first layer of several parallel threads is produced, and then a second layer of several parallel threads is laid on top of the first layer, the threads of the second layer being offset by an angle relative to the threads of the first layer. In contrast, weaving the threads crosswise, while somewhat more complex, has the advantage of a stronger bond between the threads. The interwoven threads are also referred to as warp threads and weft threads. The threads can be interwoven or crossed in such a way that each warp thread is passed alternately over and under a weft thread, and vice versa.

[0025] According to a further embodiment of the invention, the mechanical properties of the hose can be improved by a thread reinforcement comprising at least one axially extending thread. The thread reinforcement can consist of at least one thread or at least one yarn running in the axial direction, i.e., parallel to the central axis of the hose, thus increasing the tensile stiffness of the hose in the longitudinal direction. The axial thread reinforcement can be integrated into the plastic strip and thus also into the hose wall and be completely surrounded by its material. Alternatively or additionally, the axial thread reinforcement can be arranged between the hose wall and the inner layer. Furthermore, the axial thread reinforcement can be continuous over the entire length of the hose.This can mean that the axial thread reinforcement emerges from one turn of the plastic strip in the overlap area and re-enters the adjacent turn. This arrangement of the axial thread reinforcement can be achieved by inserting or introducing the reinforcement into the viscous material of the plastic strip immediately after extrusion, winding, and welding / bonding. After the plastic strip has cooled and hardened, the axial thread reinforcement can thus be surrounded by the material of the plastic strip or the tube wall. Preferably, a tube has several axial thread reinforcements, which, for example, can be arranged at equal intervals around the circumference of the tube and thus run parallel to each other and also parallel to the central axis.

[0026] Finally, according to a further embodiment of the invention, it is proposed that the fabric reinforcement and / or the thread reinforcement be made of polyamide or polyester yarn. These materials are characterized by particularly high tensile strength combined with high flexibility. In particular, it can be provided that the fabric reinforcement and / or the thread reinforcement comprise electrically conductive threads, especially copper threads, aluminum threads, or carbon threads. In this way, the reinforcements can combine the improvement of mechanical properties (e.g., stiffness, strength) with the improvement of electrical properties (e.g., conductivity) of the hose.

[0027] The invention is explained in more detail below with reference to a drawing that illustrates only a preferred embodiment. The drawing shows: Fig. 1a a first embodiment of a plastic strip for the production of a plastic hose according to the invention, Fig. 1b a second embodiment of a plastic strip for the production of a plastic hose according to the invention, Fig. 2a a fabric made of cross-shaped overlapping threads for reinforcing a plastic tube according to the invention, Fig. 2b a fabric made of cross-woven threads for reinforcing a plastic hose according to the invention, Fig. 3a a first embodiment of a hose according to the invention in longitudinal section, Fig. 3b den in Fig. 3a shown hose with axial thread reinforcement, Fig. 4a a second embodiment of a hose according to the invention in longitudinal section, Fig. 4b den in Fig. 4a shown hose with axial thread reinforcement, Fig. 5a a third embodiment of a hose according to the invention in longitudinal section, Fig. 5b den in Fig. 5a hose shown with axial thread reinforcement, Fig. 6a a fourth embodiment of a hose according to the invention in longitudinal section, and Fig. 6b den in Fig. 6a shows the hose with axial thread reinforcement.

[0028] In Fig. Figure 1a shows a first embodiment of a plastic strip 1 for producing a plastic tube according to the invention. The cross-section of the plastic strip 1 has a height H, a width B, and a length L, wherein the width B is significantly larger, in particular at least 10, 20, or 80 times greater than the height H of the plastic strip 1. For example, the height H can be in the range between 0.1 mm and 5 mm, while the width B can be in the range between 10 mm and 80 mm. The length L is a multiple of the height H and the width B; it can be several hundred meters or more. The Fig. Figure 1a shows an exemplary plastic strip 1, which is typically produced by extrusion. In this process, a plastic mass is made viscous by the influence of heat and / or pressure and is then forced through a shaping die whose opening corresponds to the cross-sectional area of ​​the plastic strip 1. In this way, plastic strips 1 with a constant cross-sectional area and any desired length can be produced.

[0029] The in Fig. The plastic strip 1 shown in Figure 1a has a fabric reinforcement 2. The fabric reinforcement 2 comprises several threads 3 that are interwoven in a cross pattern. The threads 3 are warp threads 3' and weft threads 3", which enclose an angle α. The angle α can be in the range between 60° and 80°. Alternatively to the one shown in Figure 1a, the fabric reinforcement 2 can be arranged in a cross pattern. Fig. In the variant shown in 1a, a tissue reinforcement 2 can also be obtained by not weaving the threads 3', 3" together, but merely laying them crosswise over each other. The tissue reinforcement 2 is in the Fig. 1a The plastic strip 1 shown as an example is integrated into the plastic strip 1 and completely surrounded by its material.

[0030] Fig. Figure 1b shows a second embodiment of a plastic strip 1 for producing a plastic tube according to the invention. Those areas of the plastic strip 1 that are already related to Fig. As described in section 1a, are in Fig. 1b - and in all subsequent figures - are provided with corresponding reference symbols. The essential difference to that in Fig. The plastic strip 1 shown in 1a lies in the fact that the in Fig. Figure 1b shows that the plastic strip 1, in addition to the fabric reinforcement 2, also has a reinforcement 4. The reinforcement 4 is also integrated into the plastic strip 1 and completely surrounded by its material. The outer surface of the plastic strip 1 is convex in the area of ​​the reinforcement 4, so that the plastic strip 1, compared to the one in Figure 1b, is curved outwards. Fig. The unreinforced plastic strip 1 shown in Figure 1a has a greater maximum height H. The reinforcement 4 can be made of plastic or metal and have a higher stiffness than the material of the plastic strip 1.

[0031] In Fig. Figure 2a shows a fabric made of cross-laid threads 3 for reinforcing a plastic tube according to the invention. The threads 3 are warp threads 3' and weft threads 3", which enclose the angle α. The warp threads 3' are laid loosely over the weft threads 3" and are not woven or intertwined with them. In contrast, Figure 2a shows a fabric made of cross-laid threads 3". Fig. 2b a fabric made of cross-woven threads 3 for reinforcing a plastic tube according to the invention. This fabric in turn comprises warp threads 3' and weft threads 3", which enclose the angle α. Unlike in Fig. 2a are the different threads 3', 3" in the one in Fig. However, the fabrics shown in 2b are interwoven or intertwined.

[0032] Fig. Figure 3a shows a first embodiment of a hose 5 according to the invention in longitudinal section. The hose 5 is made from the plastic strip 1 described above. In this manufacturing method, the plastic strip 1 is wound spirally, with the edge regions of the plastic strip 1 forming an overlap 6. The overlapping edge regions of the plastic strip 1 are then welded or glued together, so that a reliable seal of the seam is achieved. The hose 5 produced in this way runs symmetrically around a central axis 7 extending in the longitudinal direction of the hose 5, with the welded or glued plastic strip 1 forming a hose wall 8. The in Fig. The hose 5 shown in Figure 3a has a fabric reinforcement 2, which can be, for example, one of the fabric reinforcements 2 described above, made of overlapping or interwoven threads 3, 3', 3". The fabric reinforcement 2 is integrated into the plastic strip 1 and thus also into the hose wall 8 and is completely surrounded by its material.

[0033] In Fig. 3b is the Fig. 3a shows the hose 5 with an axial thread reinforcement 9. Those areas of the hose 5 that are already related to Fig. 3a described are in Fig. 3b - and in all subsequent figures - are provided with corresponding reference symbols. The essential difference to that in Fig. The hose 5 shown in Figure 3a is embedded in the axial thread reinforcement 9. This thread reinforcement 9 can consist of at least one thread or at least one yarn running in the axial direction, i.e., parallel to the central axis 7, and thus increasing the tensile stiffness of the hose 5 in this direction. The axial thread reinforcement 9 is integrated into the plastic strip 1 and thus also into the hose wall 8 and is completely surrounded by its material. Furthermore, the axial thread reinforcement 9 extends continuously along the entire length of the hose 5. This means that the axial thread reinforcement 9 emerges from one turn of the plastic strip 1 in the area of ​​the overlaps 6 and re-enters the adjacent turn of the plastic strip 1.This arrangement of the axial thread reinforcement 9 is achieved by inserting or introducing the thread reinforcement 9 into the viscous material of the plastic strip 1 very shortly after extrusion, winding, and welding / gluing of the plastic strip 1. In particular, the axial thread reinforcement 9 can be inserted into the viscous material of the plastic strip 1 to the same depth as the existing fabric reinforcement 2 within the plastic strip 1. After the plastic strip 1 has cooled and hardened, the axial thread reinforcement 9 is thus surrounded by the material of the plastic strip 1 or the tube wall 8. Preferably, the tube 5 has several axial thread reinforcements 9, which, for example, can be arranged at equal intervals around the circumference of the tube 5 and thus run parallel to each other and also parallel to the central axis 7.

[0034] Fig. Figure 4a shows a second embodiment of a hose 5 according to the invention in longitudinal section. The Fig. 4a The hose 5 shown as an example differs from the first embodiment ( Fig. 3a) in particular by the fact that, in addition to the hose wall 8, an inner layer 10 is also present. The hose wall 8 is formed by the plastic strip 1, which is welded or glued in the area of ​​its overlaps 6. Similarly, the inner layer 10 is formed by a second plastic strip 1', which is welded or glued in the area of ​​its overlaps 6'. In this embodiment of the hose 5, the fabric reinforcement 2 can be arranged between the hose wall 8 and the inner layer 10, so that the fabric reinforcement 2 does not need to be integrated into the plastic strips 1, 1' or into the hose wall 8 or into the inner layer 10.

[0035] In Fig. 4b is the one in Fig. 4a shows the hose 5 with an axial thread reinforcement 9. Here too, those areas of the hose 5 that were already mentioned in connection with Fig. 4a, provided with appropriate reference numerals. The essential difference to that in Fig. The tube 5 shown in Figure 4a is embedded in the axial thread reinforcement 9, which can be at least one thread or at least one yarn running in the axial direction, i.e., parallel to the central axis 7. The axial thread reinforcement 9 extends continuously over the entire length of the tube 5 and can thus increase the tensile stiffness of the tube 5 in this direction. Unlike in Figure 4a, the axial thread reinforcement 9 is not oriented in this direction. Fig. 3b, however, the axial thread reinforcement 9 is not necessarily integrated into one of the plastic strips 1, 1' and thus into the tube wall 8 or the inner layer 10. Instead, the axial thread reinforcement 9 – like the fabric reinforcement 2 – can be arranged between the tube wall 8 and the inner layer 10. This arrangement of the axial thread reinforcement 9 is achieved by placing the thread reinforcement 9 onto the inner layer 10 after the inner layer 10 has been manufactured – just like the fabric reinforcement 2. Subsequently, the plastic strip 1 is wound spirally around the inner layer 10 and the two reinforcements 2, 9 and welded or glued in the area of ​​the overlap 6.

[0036] Fig. Figure 5a shows a third embodiment of a hose 5 according to the invention in longitudinal section. Furthermore, in Fig. 5b of the in Fig. The hose 5 shown in Figure 5a is illustrated with an axial thread reinforcement 9. The third embodiment of the Fig. 5a and Fig. 5b largely corresponds to the first version of the Fig. 3a and Fig. 3b. The essential difference is that for the manufacture of hose 5 according to the first embodiment ( Fig. 3a, Fig. 3b) a plastic strip 1 without reinforcement 4 was used (see Fig. 1a), while for the manufacture of the hose 5 according to the third embodiment ( Fig. 5a, Fig. 5b) a plastic strip 1 with reinforcement 4 was used (see Fig. 1b). In the case of the Fig. In the hose 5 shown in Figure 5b, the axial thread reinforcement 9 is arranged outside the reinforcement 4. Nevertheless, both the reinforcement 4 and the axial thread reinforcement 9 are integrated into the hose wall 8 and completely surrounded by its material.

[0037] Fig. Figure 6a shows a fourth embodiment of a hose 5 according to the invention in longitudinal section. Furthermore, in Fig. 6b of the in Fig. The hose 5 shown in Figure 6a is illustrated with an axial thread reinforcement 9. The fourth embodiment of the Fig. 6a and Fig. 6b largely corresponds to the second version of the Fig. 4a and Fig. 4b. The essential difference is that for the manufacture of the hose wall 8 of the hose 5 according to the second embodiment ( Fig. 4a, Fig. 4b) a plastic strip 1 without reinforcement 4 was used (see Fig. 1a), while for the manufacture of the hose wall 8 of the hose 5 according to the fourth embodiment ( Fig. 6a, Fig. 6b) a plastic strip 1 with reinforcement 4 was used (see Fig. 1b). In the case of the Fig.In the hose 5 shown in Figure 6b, the axial thread reinforcement 9 is arranged outside the reinforcement 4. However, both the reinforcement 4 and the axial thread reinforcement 9 are arranged between the hose wall 8 and the inner layer 10. Reference symbol list: 1, 1' plastic strip 2 Tissue reinforcement 3 threads 3' warp threads 3" weft threads 4 Reinforcement 5 hoses 6, 6' overlap 7 Central axis 8 hose wall 9 Thread reinforcement 10 inner layer α angle H height B Width Length L

Claims

[1] Plastic hose (5), comprising: - a hose wall (8) made of plastic, - a tissue reinforcement (2), and - a reinforcement (4) made of plastic or metal, wherein the reinforcement (4) has a higher stiffness than the hose wall (8), - wherein the hose wall (8) is made from one or more spirally wound plastic strips (1), and - wherein the reinforcement (4) is integrated into the plastic strip (1, 1'), characterized by, that the fabric reinforcement (2) comprises crosswise superimposed threads (3, 3', 3") and / or crosswise woven threads (3, 3', 3") and that the plastic tube (5) is characterized by a thread reinforcement (9) comprising at least one axially extending thread, wherein the axial thread reinforcement (9) is continuous over the entire length of the tube (5) and wherein the axial thread reinforcement (9) runs parallel to the central axis of the tube (5). [2] Plastic hose (5) according to claim 1, characterized by , that the fabric reinforcement (2) is integrated into the tube wall (8). [3] Plastic hose (5) according to claim 1 or 2, characterized by an inner layer (10) that extends over the entire inner surface of the hose (5). [4] Plastic hose (5) according to claim 3, characterized by , that the inner layer (10) is made of one or more spirally wound plastic strips (1'). [5] Plastic hose (5) according to any one of claims 1 to 4, characterized by , that the plastic strip (1, 1') forming the hose wall (8) and / or the inner layer (10) has overlapping edge areas which are bonded together in the area of ​​the overlap (6, 6'). [6] Plastic hose (5) according to one of claims 3 to 5, characterized by , that the thickness of the inner layer (10) is less than the thickness of the hose wall (8). [7] Plastic hose (5) according to any one of claims 3 to 6, characterized by , that the fabric reinforcement (2) is arranged between the tube wall (8) and the inner layer (10). [8] Plastic hose (5) according to any one of claims 1 to 7, characterized by , that the reinforcement (4) is spirally shaped. [9] Plastic hose (5) according to any one of claims 1 to 8, characterized by, that the fabric reinforcement (2) and / or the thread reinforcement (9) is made of polyamide or polyester yarn.

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