Vibration components for motor vehicles
Motor vehicle components are subjected to continuous vibration during operation of the motor vehicle, and hydrolysis resistant (HR) glass fibres are included in polyamide compositions to improve the operational stability of the components.
1. A motor vehicle component, comprising a nylon-6 composition comprising:
100 parts by mass of nylon-6,6;
30 to 160 parts by mass of hydrolysis resistant (HR) glass fibres comprising E glass and having an average diameter of 10 +/−0.5 μm, and an average length of 3 to 4.5 mm; and
0.03 to 0.2 parts by mass of at least one metal compound of the metals Cu, Fe, Ce or Mn,
wherein the composition may include not more than 10 parts by mass of impact modifier, and/or not more than 10 parts by mass of flow improver, and/or not more than 10 parts by mass of flame retardancy additive, and/or not more than 0.5 part by mass of hydrolysed fatty acid as demoulding agent, and
wherein the HR glass fibres are injection-moulded with nylon-6,6 to give flat specimens according to DIN EN ISO 180 1-U of nominal size 80 mm ·10 mm ·4 mm, and, after storage in an autoclave at 130° C/about 2 bar for 1000 h, in a 1:1 mixture of water and ethylene glycol, have an Izod impact resistance of at least 12 kJ/m 2 determined according to ISO180-1U at 23+/−2° C.
2. The component according to claim 1 , further comprising at least one of:
not more than 10 parts by mass of impact modifier,
not more than 10 parts by mass of flow improver,
not more than 10 parts by mass of flame retardancy additive, and
not more than 0.5 part by mass of hydrolysed fatty acid as demoulding agent.
3. The component according to claim 2 , wherein based on 100 parts by mass of the nylon-6,6 there is
0.05 to 1.0 part by mass of the at least one demoulding agent, and
0.01 to 5.0 parts by mass of at least one additive from the group of UV stabilizers, pigments, colourants, fillers and nucleating agents, and wherein the at least one metal compound is copper(I) iodide/potassium iodide.
4. The component according to claim 3 , wherein the at least one demoulding agent is Licowax® E montan ester wax.
5. The component according to claim 2 , wherein based on 100 parts by mass of the nylon-6,6 there is about 0.05 to about 1.0 part by mass of demoulding agent.
6. The component according to claim 5 , wherein based on 100 parts by mass of the nylon-6,6 there is about 0.01 to about 5.0 parts by mass of at least one additive from the group of UV stabilizers, pigments, colourants, fillers other than B) and nucleating agents.
7. The component according to claim 2 , wherein the hydrolysed fatty acid is stearate.
8. The component according to claim 2 , wherein the hydrolysed fatty acid is calcium stearate.
9. The component according to claim 1 , wherein the metal compound is selected from the group consisting of: copper halides, iron oxides, iron formats, iron oxalates, cerium tetrahydroxide, and manganese chloride.
10. The component according to claim 9 , wherein the copper compounds are present in combination with at least one of alkali metal halides and alkaline earth metal halides.
11. The component according to claim 10 , wherein the alkali metal halides and alkaline earth metal halides are potassium bromide, potassium iodide, sodium chloride or calcium chloride.
12. The component according to claim 10 , wherein the copper halide is copper(I) iodide and the alkali metal halide is potassium iodide or potassium bromide.
13. The component according to claim 2 , wherein:
the at least one metal compound is copper(I) iodide/potassium iodide, and the hydrolysed fatty acid is calcium stearate.
14. The component according to claim 2 , wherein:
the at least one metal compound is copper(I) iodide/potassium iodide, and the at least one demoulding agent is Licowax® E montan ester wax.
15. The component according to claim 2 , wherein:
the at least one metal compound is copper(I) iodide/potassium iodide, the at least one demoulding agent is Licowax® E montan ester wax, and the at least one additive is carbon black or nigrosin.