Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
  • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
  • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
  • B02C18/06—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives
  • B02C18/14—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers
  • B02C18/148—Disintegrating by knives or other cutting or tearing members which chop material into fragments with rotating knives within horizontal containers specially adapted for disintegrating plastics, e.g. cinematographic films
• • E—FIXED CONSTRUCTIONS
  • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
  • E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
  • E01C13/00—Pavings or foundations specially adapted for playgrounds or sports grounds; Drainage, irrigation or heating of sports grounds
  • E01C13/06—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003
  • E01C13/065—Pavings made in situ, e.g. for sand grounds, clay courts E01C13/003 at least one in situ layer consisting of or including bitumen, rubber or plastics

Definitions

• the invention relates to a covering for sports fields, in particular for tennis courts, which has a loosely poured layer containing plastic particles on its surface, and a method for producing these plastic particles.
• a sports field covering particularly suitable for tennis courts, was proposed in CH-A-611 959, in which a carrier layer is provided in which stabilizing grains e.g. made of rubber are firmly embedded, which protrude from the carrier layer by about a third of their height dimension.
• a relatively thin covering layer of fine rubber granulate with a grain size of 0.5 to 1.5 mm is then applied to this carrier layer, which fills the gaps between the stabilizing grains protruding from the carrier layer and covers their tips. If the athlete now pulls away from the surface, the tips of the stabilizing grains are gripped by the profile sole of the tennis or sports shoe, which e.g. allows a perfect impression when starting.
• the invention seeks to remedy this.
• the invention as characterized in the claims solves the problem of a covering for S p ort p bibs, to provide in particular for tennis courts, having on its surface a loosely poured layer of plastic, and to provide a process for preparing these plastic , the topping on largely everyone any solid surface, such as on asphalt, can be applied and, if necessary, removed from it again and which is just as pleasant for the athlete in use as a brick meal area.
• a covering according to the invention which has the desired properties can only consist of a loosely poured layer of particles based on an elastic plastic, if at least the majority of the particles used have a cuboid, plate or scale shape in a geometrically defined form are trained.
• particles based on an elastic plastic is intended to indicate that the particles can contain, in addition to the plastic, fillers, aging agents, stabilizers, processing aids, dyes and / or pigments as well as inorganic additives in the usual way.
• Particles of this type have only a slight tendency to curl, which on the one hand favors a stabilization of the bed on the underbody and, on the other hand, leads to an increased braking effect with the desired slight sliding when the athlete brakes.
• a plastic band is assumed, the thickness of which is equal to one of the dimensions (for example the thickness). of the particles to be made.
• This plastic strip is now continuously fed from the roll with its front edge over a fixed shear bar provided with a comb-like toothed cutting edge.
• a rotor equipped with one or more knives works with this shear bar, the cutting edges of the knives also being comb-like teeth and interacting with the teeth of the shear bar.
• the impact knives rotate, the desired small plastic particles are then cut off from the front edge of the continuously advanced plastic strip in the intended cuboid or plate shape.
• the tape used to produce the particles consists of a thermoplastic polyurethane elastomer, such as from polyadducts of polyesters, diisocyanates and chain extenders, e.g. according to the 400 series from EUROPOLYMERS LTD., England.
• the belt used for particle production consists of a one or two component polyurethane system, e.g. from a modified MDI and an ether-glycol mixture, as it is offered in a cold-curing system of the BAYSPORT type from BAYER, Germany.
• the tape used for particle production consists of a thermoplastic rubber, which in particular Copolymerization of styrene and butadiene is produced and as it is offered for example by the company SHELL CHEMIE, Vienna.
• the tape used for particle production consists of a modified PVC compound.
• the modifying agent can be a polyurethane elastomer, e.g. by the company EUROPOLYMERS LTD., England, under the type 707, or a permanent plasticizer based on synthetic resin, as is offered by the company Du Pont, Switzerland, under the type ELVALOY 741.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Architecture (AREA)
• Civil Engineering (AREA)
• Structural Engineering (AREA)
• Road Paving Structures (AREA)
• Soil Conditioners And Soil-Stabilizing Materials (AREA)
• Management, Administration, Business Operations System, And Electronic Commerce (AREA)
• Processes Of Treating Macromolecular Substances (AREA)
• Aiming, Guidance, Guns With A Light Source, Armor, Camouflage, And Targets (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
• Golf Clubs (AREA)
• Road Repair (AREA)
• Application Of Or Painting With Fluid Materials (AREA)

Priority Applications (4)

Applications Claiming Priority (2)

Publications (3)

Family

ID=3505626

Family Applications (1)

Country Status (4)

Cited By (4)

Families Citing this family (3)

Family Cites Families (14)

• 1981
  • 1981-03-09 AT AT0105681A patent/AT374115B/de not_active IP Right Cessation
• 1982
  • 1982-03-08 DE DE8282890036T patent/DE3268073D1/de not_active Expired
  • 1982-03-08 EP EP82890036A patent/EP0063111B1/fr not_active Expired
  • 1982-03-08 AT AT82890036T patent/ATE17139T1/de not_active IP Right Cessation
• 1983
  • 1983-03-07 US US06/472,666 patent/US4822026A/en not_active Expired - Fee Related

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