Classifications

• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B1/00—Constructional features of ropes or cables
  • D07B1/02—Ropes built-up from fibrous or filamentary material, e.g. of vegetable origin, of animal origin, regenerated cellulose, plastics
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
  • A01K91/00—Lines
• • A—HUMAN NECESSITIES
  • A63—SPORTS; GAMES; AMUSEMENTS
  • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
  • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
  • A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
• • D—TEXTILES; PAPER
  • D07—ROPES; CABLES OTHER THAN ELECTRIC
  • D07B—ROPES OR CABLES IN GENERAL
  • D07B1/00—Constructional features of ropes or cables
  • D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
  • D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
  • D07B1/142—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases for ropes or rope components built-up from fibrous or filamentary material

Definitions

• This invention relates to strings, especially to strings for use in stringing racquets for use in ball games, for example, badminton, squash and tennis.
• This invention is based on the observation that strings for games racquets, which strings are made from longchain synthetic polymeric materials, are more pliable and have a considerably longer life, under normal conditions of use, if a lubricant is incorporated in the string during manufacture.
• the string is a cored string made up from a core consisting of at least one monofilament of a long-chain synthetic polymeric material and at least one helical wrapping of a long chain synthetic polymeric material.
• the core consists of a number of monofilaments
• the monofilaments may be longitudinally aligned or twisted or plaited together.
• the monofilaments forming the core may be solid or have one or more axial bores extending along the whole of their length.
• the strings may be made by methods known in the art or published in the literature for making such strings. Thus, for example, they may be made by coating the core with an adhesive suitable for bonding together the synthetic materials used for the core and the wrapping, for example an adhesive based on a solution of nylon in a solvent, for example a mixture of phenol and 1,1,2-trichloroethane, helically winding onto the core one or more layers of a synthetic long-chain polymer textile material and heating the combination to dry the adhesive, preferably while the string is under tension.
• an adhesive suitable for bonding together the synthetic materials used for the core and the wrapping for example an adhesive based on a solution of nylon in a solvent, for example a mixture of phenol and 1,1,2-trichloroethane, helically winding onto the core one or more layers of a synthetic long-chain polymer textile material and heating the combination to dry the adhesive, preferably while the string is under tension.
• the adhesive is preferably a solution consisting of about 16% of nylon flake, in a mixture of about.32% of phenol and about 52% of 1,l,2-trichloroethane, the percentages being calculated on the weight of the solution.
• the completed string comprising the core and the helically wound wrapping is preferably dried by passing it through a tube through which a stream of air at a temperature within the range of from 60 C. to 70 C. is also passed.
• each layer When two or more layers of textile material are wound onto the core the direction of winding of each layer is 3,605,399 Patented Sept. 20, 1971 "ice preferably in a direction opposite to the direction of winding of the previous layer.
• Suitable materials for both the core and the wrapping are,.for example, polyamides, for example, a nylon, or polyesters, for example, polyethylene terephthalate.
• the material of the core may be the same as or different from the materialof the windings.
• the lubricant may be contained, as applicable, between the wrapping and the core, between the individual monofilaments forming the core or in the bore or bores in the monofilaments forming the core or in all these positions, as the construction of the string allows.
• the lubricant may be applied in any desired manner.
• the core and the wrapping are not to be adhesively bonded together it can be applied to the outer surface of the core prior to application of the helical wrappings but such a method will generally not be practicable.
• the lubricant is therefore preferably injected into the core, either into the bore or bores in the monofilament or monofilaments or into the spaces between the individual monofilaments by inserting an injector into the core and forcing the lubricant into the core under high pressure, preferably while simultaneously applying a reduced pressure to the other end of the string.
• an injector into the core and forcing the lubricant into the core under high pressure, preferably while simultaneously applying a reduced pressure to the other end of the string.
• a string for games racquets comprising a core consisting of at least one monofilament of a long chain synthetic polymeric material and at least one helical wrapping of a long chain synthetic polymeric material, said at least one monofilament having at least one axial bore extending along the whole of its length, which bore is filled with a lubricant.
• a string for games racquets as claimed in claim 1 in which said polymeric material is nylon.
• a string for games racquets as claimed in claim 1 comprising an adhesive between said core and wrapping, said adhesive consisting essentially of a solution of nylon in a mixture of phenol and 1,1,2-trichloroethane.
• a string for games racquets as claimed in claim 7 in which said solution comprises about 16% nylon, in a 3 mixture containing about 32% phenol and 52% of 1,1,2- trichloroethane, said percentages being by weight and based on the solution.

Landscapes

• Life Sciences & Earth Sciences (AREA)
• Environmental Sciences (AREA)
• Animal Husbandry (AREA)
• Biodiversity & Conservation Biology (AREA)
• Health & Medical Sciences (AREA)
• General Health & Medical Sciences (AREA)
• Physical Education & Sports Medicine (AREA)
• Chemical & Material Sciences (AREA)
• Oil, Petroleum & Natural Gas (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Ropes Or Cables (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=10065837

Family Applications (1)

Country Status (4)

Cited By (8)

Families Citing this family (6)

Family Cites Families (15)

• 1967
  • 1967-04-06 GB GB1580767A patent/GB1228171A/en not_active Expired
• 1968
  • 1968-03-29 US US717457A patent/US3605399A/en not_active Expired - Lifetime
  • 1968-04-05 DE DE1703132A patent/DE1703132C3/de not_active Expired
  • 1968-04-05 NL NL686804833A patent/NL144161B/xx unknown

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