DE1992811U - HEAT-RESISTANT HOSE. - Google Patents

Description

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PHOENIX RUBBER WORKS RECEIVER HAMBURQ-90 SHEET

WTIENGESELLSCHAFT

wmburg-harburg German Patent Office

Px lii η c h e η 2 May 13, 1968 1

Heat resistant hose

Me loration concerns a heat-resistant hose made of rubber or rubber-like plastic with a knitted insert lying between the inner and outer tube walls, in which the threads are made of fully synthetic material and a bond between the tube walls through the insert consists.

Heat-resistant hoses of the structure described above are used in engine coolers in motor vehicle construction. Me requirements for the load-bearing capacity with regard to compressive strength, adhesive strength between inner and outer walls, The lack of elongation under pressure is considerable. With the hoses previously intended for this purpose, in particular the separation strength between inner and outer rubber and the Resistance to expansion under pressure at elevated temperature do not meet the high requirements in all cases.

The object of the innovation is to improve the above-mentioned hoses as regards resistance to expansion under heat and pressure and with respect to cohesive strength of the inner and Außenschlauehwandung through the tissue. Surprisingly, this object could be achieved by the fact that the interlining made of knitted, fully synthetic fiber material does not consist of one multifilament thread, but of two parallel multifilament threads «

Although it is known to be made from twisted insoles in hoses To use fabric made of multiple threads. However, it has always been found that the properties of the Change the tube analogous to the multiplication of the thread.

98.417 / 90137 29353.

PHOENIX RUBBER WORKS RECEIVER HAMBURG-90 SHEET

SHARED COMPANY

ARBUHG German Patent Office

O169 Px Munich 2 May 13, 1968 2

For this special case, however, it has surprisingly been found that the replacement of the multifilament thread with two multifilament threads running next to one another of the same cross-section results in a significant improvement in the separating strength of the inner and outer rubber layers φ Me increase in separating strength is, for example, approximately 6o to 7 ° i ° > This result is remarkable because the denser mesh layer makes it difficult for the rubber compound to pass through the fabric during the manufacture of the hose. Furthermore, the resistance to expansion under pressure could also be increased by approximately 30 tfo . In this connection, however, it must also be admitted that the increase in compressive strength was not doubled, but only an increase of 70 tfo was achieved, although it was theoretically should have been loo ^.

The hiring is described using an illustration, for example.

The two Schlauehwandungen 1 and 2 consist of two different lie opr enmi sehungen. Between them is a fabric insert 3 made of BTylon. The fabric shows a knitted structure in which two threads run parallel to one another. The thread size is 1260 denier. Before the outer hose wall 1 is applied, an adhesion promoter is applied to the fabric. The 3-knit form can be seen in a section at 4. The hose has the following properties with a wall thickness of 4.5 mm and an inner diameter of 32 mm! maximum burst pressure 22 atm, adhesive strength of the two layers 1 and 2 to one another 8 kg / cm, expansion under the pressure of 3 atm based on the outer diameter yfo »

598.417 / 9013/29353.

Claims (1)

PHOENIXQUMMIWEBKE RECEIVER HAMBURG -90 SHEET SHARED COMPANY Hamburg-Harburg German Patent Office 0I69 Px M ü η c h en 2 I3.5.I96Ö 3 Protection claims 1. Heat-resistant hose made of rubber or rubber-like Plastic with a knitted insert between the inner and outer tube walls, the thread insert being made of fully synthetic material Material, characterized in that the fiber material consists of two parallel monofilament threads consists. 2. Hose according to Inspruch 1, characterized in that the The number of stitches per cm circumference is 2 to 4 « 8.417 / 9013/29353.