Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1996-04-10
1998-05-12
Maki, Steven D.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
156191, 156294, 1563066, 156327, 428 407, 428 415, 428355R, 428355AC, A63B 5314, B29C 6306, B29C 6318, C09J 702
Patent
active
057499918
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method of affixing a first hollow object or part to a second object or part with the aid of an internal layer of binding agent. In this regard, the invention relates in particular to a handgrip which is intended to be fitted to the shaft of a golf club, and also to a golf club having such a handgrip fitted thereto.
2. Description of the Prior Art
Hitherto known methods for affixing tubular plastic objects or tubular elastomeric objects onto other objects in which the outwardly lying object is secured through the medium of an intermediate coating have been difficult to apply in practice, particularly when desiring a tight fit at the interface or boundary surface between the outwardly lying and the inwardly lying objects to be joined.
The adhesives used to bond materials together when at least one of the materials concerned is a polymeric material normally contain a certain amount of solvent. In some cases, a certain amount of plastic material is dissolved when bonding said materials together, resulting in a molecular bond between glue joint and substrate. In those cases when the polymer is not attacked by solvent, there is used, among others, a contact adhesive, although in this case solely an adhesive bond is obtained between the said materials. However, this type of adhesive also includes a powerfully acting solvent.
EP Patent Application No. 0,439,259 (publication date Jul. 31, 1991) discloses an example of glue-based bonding between an elastomer and a metal. In this case, a relatively strong bond is obtained with the metal substrate, by coating the substrate with a primer in the form of epoxydized diene-polymer and a phenol resin. In addition to the primer, there is used a bonding agent in the form, e.g., of a halogenated rubber adhesive or glue, while ketones are preferably used as a solvent.
When concerning the production of the articles mentioned in the introduction and comprising a separate, outwardly lying tubular object which has been tightly fitted to a centrally located object, such as a shaft for instance, it is not necessary to produce a glue joint which exhibits a molecular bonding action or some other form of strong anchorage against one of the objects or substrate surfaces, provided that fixation of the outwardly lying object is achieved by utilizing the tensioning forces that are generated by said outwardly lying object. In this regard, strong glue joints can be obtained by, for instance, coating the shaft or the outwardly lying object with a bonding agent which has a sticking function. Nevertheless, when practicing prior art methods it is necessary, in the majority of cases, to use a glue which has a high organic solvent concentration, so as to reduce the frictional forces acting between shaft and outwardly lying object when fitting the object to the shaft.
SUMMARY OF THE INVENTION
It has now surprisingly been found that a glue-product which has a good sticking capacity when dry can be produced by mixing a specific, highly adhesive glue with a preferably polytetrafluoroethylene based substance. The glue is coated on one of the objects and allowed to dry. The glue coating on the product can be activated whenever desired, by bringing the coating into contact with water, even after the object has been left in storage for several years. The water makes the surface very slippery, therewith greatly reducing the frictional properties of the surface and the surface will become very sticky when the water has evaporated.
The invention enables the objects to be readily bonded together, even when the space available for applying the glue is practically non-existent and the tubular object is already in place on the inwardly lying object.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
It will be readily understood that the inventive method can be applied in any relevant field of use. For instance, the invention can be applied with pipes made of rubber or some other material and fitted onto another pipe and where a
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Lezdey John
Maki Steven D.
Niblick International AB
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