WO2011088906A1

WO2011088906A1 - Tubular article, in particular a high-strength textile high-pressure tube

Info

Publication number: WO2011088906A1
Application number: PCT/EP2010/065584
Authority: WO
Inventors: Klaus Brühne; Jörg EUBEL; Thomas Klyscz; Rainer Lange; Metin Tasseki
Original assignee: Contitech Schlauch Gmbh
Priority date: 2010-01-25
Filing date: 2010-10-18
Publication date: 2011-07-28
Also published as: DE102010000180A1; EP2529140A1

Abstract

The invention relates to a tubular article having at least the following layer structure : an inner layer (01) and an outer layer (05), each of which is made of a polymeric material having elastic properties; and a first reinforcement layer (02) and a second reinforcement layer (03), which are embedded between the inner layer (01) and the outer layer (05) and which each consist of a textile material, wherein the first reinforcement layer (02) is connected to the inner layer (01) and the second reinforcement layer (03) is connected to the outer layer (05). The tubular article according to the invention is characterised in that the expansion of the first reinforcement layer (02) is greater than the expansion of the second reinforcement layer (03). An intermediate layer (04) made of a polymeric material having elastic properties is preferably disposed between the first reinforcement layer (02) and the second reinforcement layer (03), which are each designed in particular as interlaced textile material. The tubular article is in particular a high-strength high-pressure tube.

Description

description

Tubular article, in particular a high-strength textile high-pressure hose

The invention relates to a tubular article having at least the following

Layer structure:

- an inner layer and an outer layer, each made of a polymeric

Material with elastic properties exist; such as

A first strength support layer and a second strength support layer embedded between the inner layer and the outer layer and each made of a textile material, the first strength support layer communicating with the inner layer and the second strength support layer communicating with the outer layer.

In high-pressure hoses braces in the form of a braided structure have a special meaning. In this case, at least two layers of thread are used in a crossed arrangement to form a braid angle, wherein the essential state of the art is set out below.

The braid consists of steel threads, which are in particular tempered and surface-protected. They are used in particular as hydraulic hoses and in active suspension systems for use, reference being made, for example, to the following patent literature: DE 41 18 023 C2

DD 289 896 A7 The disadvantage is that acoustic problems occur with such a reinforcement concept. In addition, such hoses are characterized by a low

Volume increase off.

In the meantime, high-pressure hoses with a reinforcement concept on the basis of a first textile braid and a second textile braid have gained importance, reference being made, for example, to the following patent literature: DE 10 2008 014 988 A1

EP 0 567 115 Bl

US 2009/0236004 AI

On the market are high-pressure hoses, in which the thread material of the textile braid consists of polyvinyl alcohol (PVAL). However, a disadvantage here is a small increase in volume at the operating point (180 bar <10%) and a non-optimal working strength.

Within the scope of a further development, the object of the invention is to provide a generic tubular article which is to fulfill the following requirements:

- a high dynamic strength; A progressively increasing volume increase up to about 75 bar (FIG. 2, curve b) and a volume increase of> 15% at 200 bar;

- a static permanent pressure resistance and - a higher flexibility. This object is achieved in that the elongation of the first reinforcement layer is greater than the elongation of the second reinforcement layer.

With regard to the first and second reinforcement layer, the appropriate material criteria are given below.

- First reinforcement layer

The first strength support layer has an elongation of 5 to 40%.

The first reinforcement layer is made of polyamide (PA), polyester (PES), m-aramid, polyoxodiazole (POD) or polyphenylene sulfide (PPS).

The first reinforcement layer is formed from a yarn or twisted yarn, in particular based on staple fibers or continuous filament yarns.

- Second reinforcement layer

The second reinforcing layer has an elongation of 0 to 10%.

The second reinforcement layer consists of aramid, in particular of p-aramid, carbon fibers, glass fibers or polybenzoxazole (PBO).

The second reinforcement layer is formed of a thread or twine. Of particular importance is the twist thread.

The first reinforcement layer and / or the second reinforcement layer is / are in particular formed as a textile braid. It is useful if both

Reinforcing layers form a textile braid. The braid angle is

50 ° to 56 °, in particular 54 °. Between the first reinforcement layer and the second reinforcement layer, at least one intermediate layer of a polymeric material having elastic properties is preferably arranged. The tubular article with the new reinforcement concept can be used for

Delivery hoses, air bellows and expansion joints are used. Of particular importance is the use in the hose sector, the high-strength textile high-pressure hose is particularly noteworthy. In particular, in the hose sector, other layers may be present, for example an inliner in the form of a film of polyamide (PA) or a

Fluoroplastic, in particular of polytetrafluoroethylene (PTFE).

With regard to the polymeric material having elastic properties for the

Inner layer, outer layer and the intermediate layer / s of the tubular article are used in particular the following two variants:

Variant A The polymeric material is an elastomeric material based on a vulcanized rubber composition containing a non-cut rubber component or a rubber component

Contains rubber component blend and usual Mischingingredienzien. Particularly suitable as rubber components are: ethylene-propylene copolymer (EPM)

Ethylene-propylene-diene copolymer (EPDM)

Nitrile rubber (NBR)

(partially) hydrogenated nitrile rubber (HNBR)

Fluoro rubber (FKM)

Chloroprene rubber (CR)

Natural rubber (NR) Styrene butadiene rubber (SBR)

Isoprene rubber (IR)

Butyl rubber (HR)

Bromobutyl rubber (BIIR)

Chlorobutyl rubber (CUR)

Butadiene rubber (BR)

Chlorinated polyethylene (CM)

Chlorosulfonated polyethylene (CSM)

Polyepichlorohydrin (ECO)

Ethylene-vinyl acetate rubber (EVA)

Acrylate rubber (ACM)

Ethylene acrylate rubber (AEM)

Silicone rubber (MQ, VMQ, PVMQ, FVMQ, DE 10 2006 058 470 AI)

Fluorinated methyl silicone rubber (MFQ)

Perfluorinated propylene rubber (FFPM)

Perfluorocarbon rubber (FFKM)

Polyurethane (PU)

The use of a blend, in particular in conjunction with one of the abovementioned types of rubber, for example a NR / BR blend, is also possible.

Of particular importance are: EPM, EPDM, CR, NR, NBR, CM, CSM, HNBR, FKM, ACM or AEM. The usual mixture ingredients comprise at least one crosslinker or a

Crosslinking system (crosslinking agent and accelerator). Other mixing ingredients are usually still a filler and / or a processing aid and / or a plasticizer and / or an anti-aging agent and optionally further

Additives (eg color pigments, fibers). In this regard, reference is made to the general state of rubber mixing technology. Variant B

The polymeric material is a thermoplastic vulcanizate (thermoplastic

Elastomer, abbreviation TPE), comprising at least one thermoplastic component, at least one rubber component which is at least partially crosslinked, as well as customary mixing ingredients.

The preferred thermoplastic components are: polyolefin, especially polyethylene (PE) or polypropylene (PP);

polystyrene;

Polyamide (PA), for example PA6 or PA6.6;

Polyester (PES). As rubber components are in particular EPM, EPDM, SBR, CR, NR, NBR, FKM, ACM or AEM mentioned, which are blended in particular with no other rubber component.

With regard to the customary mixing ingredients, the mixing technology is used for variant A, in particular the teaching according to the published patent application

DE 100 04 632 AI referenced.

The two polymer material variants (A, B) are of particular importance for delivery hoses.

The invention will now be explained with reference to an embodiment with reference to schematic drawings. Show it:

Fig. 1 a tubular article in the form of a high-strength textile

High-pressure hose; Fig. 2 is a comparison diagram with the curves a and b.

1, the tubular article in the form of a high-pressure hose from inside to outside has the following layer structure:

An inner layer 01 of an elastomeric material, for example based on ACM;

- A first reinforcement layer 02 in the form of a textile braid, in particular from

PA.

An intermediate layer 04 made of an elastomeric material, for example based on ACM; - A second reinforcement layer 03 in the form of a textile braid, in particular of p-aramid;

An outer layer 05 made of an elastomeric material, for example based on EPDM.

Of essential importance to the invention is that the elongation of the first reinforcement layer 02 is greater than the elongation of the second reinforcement layer 03.

FIG. 2 now shows a comparison diagram with the following data or criteria:

Ordinate volume increase [%]

Abscissa pressure [bar]

Curve a: Volume increase of a high-pressure hose with steel braiding according to the prior art Volume increase according to a high pressure hose according to the invention with reference to the exemplary embodiment according to FIG. 1

LIST OF REFERENCE NUMBERS

(Part of the description)

Ol inner layer

02 first reinforcement layer

03 second reinforcement layer

04 interlayer

05 outer layer

Claims

claims

1. Tubular article with at least the following layer structure:

- An inner layer (01) and an outer layer (05), each of a

consist of polymeric material with elastic properties; such as

- A first reinforcement layer (02) and a second

Reinforcing layer (03), between the inner layer (01) and the

Outer layer (05) are embedded and each consist of a textile material, wherein the first reinforcement layer (02) with the inner layer (01) and the second reinforcement layer (03) with the outer layer (05) in

Connect; characterized in that the elongation of the first reinforcement layer (02) is greater than the elongation of the second reinforcement layer (03).

2. Tubular article according to claim 1, characterized in that the first reinforcement layer (02) has an elongation of 5 to 40%.

3. Tubular article according to claim 1 or 2, characterized in that the first reinforcement layer (02) made of polyamide (PA), polyester (PES), m-aramid, polyoxodiazole (POD) or polyphenylene sulfide (PPS) consists.

4. Tubular article according to one of claims 1 to 3, characterized

in that the first reinforcement layer (02) is formed from a thread or twine thread.

5. Tubular article according to one of claims 1 to 4, characterized

in that the first reinforcement layer (02) is formed from staple fibers or continuous filament yarns.

6. Tubular article according to one of claims 1 to 5, characterized in that the second reinforcement layer (03) has an elongation of 0 to 10%.

7. Tubular article according to one of claims 1 to 6, characterized

in that the second reinforcement layer (03) is made of aramid,

Carbon fibers, glass fibers or polybenzoxazole (PBO) consists.

8. Tubular article according to claim 7, characterized in that the

second reinforcement layer (03) consists of p-aramid.

9. Tubular article according to one of claims 1 to 8, characterized

in that the second reinforcement layer (03) is formed from a thread or twine thread.

10. Tubular article according to one of claims 1 to 9, characterized

in that the first reinforcement layer (02) and / or the second reinforcement layer (03) is / are formed as a textile braid.

11. A tubular article according to claim 10, characterized in that the first textile braid (02) and / or the second textile braid (03) a

Braid angle of 50 ° to 56 ° has / have.

12. Tubular article according to one of claims 1 to 11, characterized

in that at least one intermediate layer (04) made of a polymer material having elastic properties is arranged between the first reinforcement layer (02) and the second reinforcement layer (03).

13. Tubular article according to one of claims 1 to 12, characterized

characterized in that it is a delivery hose, air bag or compensator. Tubular article according to claim 13, characterized in that the

Delivery hose is a high pressure hose.