| (19) |
 |
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(11) |
EP 0 259 940 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
10.10.1990 Bulletin 1990/41 |
| (43) |
Date of publication A2: |
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16.03.1988 Bulletin 1988/11 |
| (22) |
Date of filing: 14.09.1987 |
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| (84) |
Designated Contracting States: |
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AT BE CH DE ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
12.09.1986 NL 8602312
|
| (71) |
Applicant: Koninklijke Nijverdal-Ten Cate N.V. |
|
NL-7607 GB Almelo (NL) |
|
| (72) |
Inventors: |
|
- Terhorst, Antonius Vincentius
NL-7576 EM Oldenzaal (NL)
- van den Bosch, Harm
NL-7607 HA Almelo (NL)
|
| (74) |
Representative: Schumann, Bernard Herman Johan et al |
|
Arnold & Siedsma,
Advocaten en Octrooigemachtigden,
Sweelinckplein 1
2517 GK Den Haag
2517 GK Den Haag (NL) |
|
| |
|
| (54) |
Method of manufacturing an artificial grass and an artificial grass obtained therewith |
(57) A method for manufacturing artificial grass consists of an underlayer and strip-like
pile threads embedded therein, which threads protrude, as grass, on one side out
of the underlayer, particularly for a sports field, for instance a football pitch.
The object of the current invention is to make available a method which enables the
manufacture of an artificial grass such that it meets requirements with respect to
coefficient of friction/roughness.
Use can be made of frizzing or crinkles to obtain the isotropic properties of the
turf. An effective lowering of the coefficient of friction can be realized in this
way. Use can be made for this purpose of a circle knit method or knitdeknit. The crinkles
can be fixed by a heat treatment.
As an alternative substances may be added (mixed coated or coextruded) reducing the
friction coefficient.