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Paramétrages

Paramétrages

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1. WO2000032029 - FIXATION DE MOTTES

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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Claims

1. A divot retainer comprising a ground-penetrating stem (3) and a divot- retaining head (2), characterised in that the retainer is of a moulded starch- based hydrophilic composition.

2. A divot retainer as claimed in claim 1, wherein the composition comprises an organic starch and a plasticizer.

3. A divot retainer as claimed in claim 2, wherein the composition further comprises water.

4. A divot retainer as claimed in claim 2 or 3, wherein the water proportion is in the range of 11.8% to 12.8% by weight.

5. A divot retainer as claimed in any preceding claim, wherein the composition comprises a dye of a natural starch-based resin with organic pigments.

6. A divot retainer as claimed in claim 5, wherein the proportion of dye is approximately 2% by weight.

7. A divot retainer as claimed in any preceding claim, wherein the head is of elongate substantially rectangular shape in plan view.

8. A divot retainer as claimed in any preceding claim, wherein the stem is cross- shaped in plan.

9. A divot retainer as claimed in claim 8, wherein the stem is symmetrical about both orthogonal axes.

10. A divot retainer package comprising a divot retainer as claimed in any preceding claim contained in an air-tight package.

11. A method of producing a divot retainer comprising the steps of preparing a starch-based hydrophilic material and injection moulding the material to a form comprising an integral divot-retaining head and a ground-penetrating stem.

12. A method as claimed in claim 11, wherein the material comprises a destructured organic starch and a plasticizer.

13. A method as claimed in claim 12, wherein the material further comprises water.

14. A method as claimed in claim 12 or 13, wherein the relative proportions of starch, plasticizer, and water are approximately 83:5:12 by weight.

15. A method as claimed in any of claims 11 to 14, wherein a dye of a natural starch-based resin with organic pigments is added to the material before moulding.

16. A method as claimed in claim 15, wherein the proportion of dye is approximately 2% by weight.

17. A method as claimed in any of claims 11 to 16, wherein the material is dried by heating before moulding.

18. A method as claimed in claim 17, wherein the material is dried by heating at a temperature in the range 95°C to 105°C for a duration of 1 to 2 hours.

19. A method as claimed in claim 18, wherein the drying temperature is approximately 100°C and the duration is approximately 90 minutes.

20. A method as claimed in any of claims 11 to 19, wherein the injection moulding barrel temperature is in the range of 185°C to 215°C.

21. A method as claimed in claim 20, wherein the barrel temperature is ramped up within said temperature range before injection.

22. A method as claimed in claim 21, wherein the temperature is ramped from approximately 190°C to approximately 210°C.

23. A method as claimed in claim 22, wherein the barrel dwell time is in the range of 1 to 4 minutes.

24. A method as claimed in claim 23, wherein the barrel dwell time is in the range of 2 to 3 minutes.

25. A method as claimed in any of claims 11 to 24, wherein the mould temperature is in the range of 9°C to 30°C.

26. A method as claimed in claim 25, wherein the mould temperature is approximately 12°C.

27. A method as claimed in any preceding claim, wherein the material is simultaneously injected in a plurality of moulds arranged in a ring-shaped configuration.

28. A method as claimed in claim 27, wherein the moulds are water-cooled.

29. A method as claimed in any of claims 11 to 28, wherein the moulds are shaped to provide a stem which is cross-shaped in plan.

30. A method as claimed in any of claims 11 to 29, wherein the material is injected into a mould open gate.

31. A method as claimed in any of claims 11 to 30, wherein the method comprises the further step of immediately packaging the retainer in an airtight package.

32. A divot retainer whenever produced by a method as claimed in any of claims 11 to 31.