Valve stem made of thermoplastic material

Patent metadata

Field	Value
Publication number	US-11148484-B2
Application number	US-201816626123-A
Country	US
Kind code	B2
Filing date	Jul 13, 2018
Priority date	Jul 14, 2017
Publication date	Oct 19, 2021
Grant date	Oct 19, 2021

Abstract

The present invention relates to a tire valve, in particular a bicycle tire valve, comprising a tubular stem, where the stem consists of a composition (Z1) comprising a thermoplastic (P1) and comprising a filler (F1), and also to a valve stem for the production of a tire valve, where the valve stem is tubular and consists of a composition (Z1) comprising a thermoplastic (P1) and comprising a filler (F1). The present invention further relates to the use of the valve of the invention for the production of a molding comprising an inflatable tube section, in particular an inner tube for a tire, and also to the use of the valve of the invention for the production of a tubeless bicycle tire.

First claim

The invention claimed is:

1. A tire valve comprising a tubular stem, where the stem consists of a composition (Z1) comprising a thermoplastic (P1) and comprising a filler (F1),
where the filler (F1) is fibrous having a fiber diameter of from 3-30 μm.

2. The valve according to claim 1 , where the thermoplastic (P1) is a thermoplastic polyurethane.

3. The valve according to claim 1 , where the composition (Z1) comprises, based on the entire composition (Z1), a quantity in the range from 5 to 55% by weight of the filler (F1).

4. The valve according to claim 2 , where the Shore hardness of the thermoplastic polyurethane is in the range from 85 A to 85 D.

5. The valve according to claim 2 , where the modulus of elasticity of the thermoplastic polyurethane is in the range from 500 to 8000 MPa, determined in the tensile test in accordance with DIN EN ISO 527.

6. The valve according to claim 2 , where the thermoplastic polyurethane is based on an aromatic isocyanate.

7. The valve according to claim 1 , where the valve comprises a valve base made of a thermoplastic material.

8. A valve stem for the production of a tire valve, where the valve stem is tubular and consists of a composition (Z1) comprising a thermoplastic (P1) and comprising a filler (F1),
where the filler (F1) is fibrous having a fiber diameter of from 3-30 μm.

9. The valve according to claim 1 , wherein said filler is at least one filler selected from the group consisting of glass fiber, carbon fiber, aramid fiber, potassium titanate fiber, liquid-crystalline polymer fiber and organic fibrous filler.

10. The valve according to claim 1 , wherein said filler is glass fiber.

11. The valve according to claim 1 , wherein said filler has a fiber diameter of from 6-20 μm.

12. The valve according to claim 1 , wherein said filler has a fiber length of from 20-1000 μm.

13. The valve according to claim 1 , wherein said filler has a fiber length of from 180-500 μm.

14. The tire valve according to claim 1 , wherein said composition has a greater flexibility than that of said thermoplastic in the absence of said filler.

Assignees

• Basf Se
• Schwalbe Ralf Bohle Gmbh

Inventors

• Ottens Mark
• Henze Oliver Steffen
• Schaefermeier Felix

Classifications

• C08G18/7671

  containing only one alkylene bisphenyl group · CPC title

• B60C29/002 Primary

  characterised by particular features of the valve core · CPC title

• B60C29/005 Primary

  characterised by particular features of the valve stem · CPC title

• F16K15/20

  specially designed for inflatable bodies, e.g. tyres (connecting valves to inflatable bodies B60C29/00) · CPC title

• B60C29/04

  Connection to tyres {or inner tubes} · CPC title