Bellows, use of same and method for producing same

A bellows, construction technology, applied in the direction of chemical instruments and methods, applications, tubular articles, etc., can solve problems such as expensive bellows
CN112976699APending Publication Date: 2021-06-18CARL FREUDENBERG KG
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CARL FREUDENBERG KG
Publication Date
2021-06-18

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Abstract

The invention relates to a bellows having an at least two-layer structure. The bellows comprises at least one first layer (1) and at least one second layer (2). All the layers (1, 2, 3) are produced simultaneously by co-extrusion in a common co-extrusion tool and are produced so as to form a corrugated tube and thus are non-releasably connected to one another.
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Description

technical field

[0001] The invention relates to a bellows, the use of the bellows and a method for producing the bellows. Background technique

[0002] Bellows are well known and are usually made of thermoplastic elastomers. Existing corrugated pipes have a single-layer structure and are produced from blown pipes, in particular by extrusion blow molding.

[0003] Due to the single-layer structure, bellows are often only insufficiently adapted to the respective given conditions of the application. A subregion of the single-layer bellows must also be made of the material used, to which other materials may be better suited, for example with regard to performance properties, the lowest possible weight or more economical manufacturability. Especially when the materials used are expensive, the bellows produced therefrom also become expensive. Contents of the invention

[0004] The object addressed by the present invention is to further develop the corrugated tube and the meth...

Claims

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