JPS5988518A - Highly durable fender - Google Patents

Abstract

PURPOSE:To raise the wear resistance and rigidity of the outer skin of a fender by using an elastic rubber material containing 2-20wt% dispersed silicon carbide whisker. CONSTITUTION:A fender is of a cylindrical form whose both end are expanded, having the layer of an elastic rubber material 3 wherein an adequate amount of silicon carbide whisker is uniformly dispersed on its outer face, the inside of which is bonded with a reinforcing layer 4 of nylon cord, etc., with a mooring cable 6 connected to a metal tool 5 attached to both ends of the fender 1 to be expanded by injection of air on its inside, by which the fender 1 is held on a given surface of water. In case where the mixing ratio of the silicon carbide whisker is 2wt% or less, the durability and rigidity of the fender are insufficient, and the results of wearing test of the elatic material 3 containing 6wt% the whisker show that the abrasion value is 1/10 of that of the elastic material containing no whisker.

Description

[Detailed description of the invention] The present invention focuses on improving the fender H.

In order to soften the punishment when ships come alongside Kogashira,
Fenders are used. A typical fender is a pneumatic type, which is a cylindrical bag with air sealed inside.
The outer side is made of rubber such as rubber, and the inner side is covered with sails (1i, tie coat, spool cord, etc.) to form a tensile reinforcement layer.

The rubber sheathing used in conventional fenders lacks rigidity and foreign objects can easily get caught in the wrinkles of the sheathing when coming alongside.
The damage caused by this was a major cause of damage to the banks and other parts of fender I. Therefore, the entire C1 fender was covered with net 1~ such as Lier 1A and Jane 1~ to prevent foreign objects from getting caught in it, but this caused damage due to the fact that it was prone to rust. , there was a problem that repairs were time-consuming.

The object of the present invention is to eliminate these drawbacks and provide a fender with increased durability by improving the rigidity and abrasion resistance of the outer skin.

The fender of the present invention has a layer of rubbery elastic material on at least the outer layer, and the fender has a rubbery elastic material of 2 to 20%.
It is characterized by using a mixed composition J5 semi-uniformly dispersed with TIim% of carbonized and filamentous whiskers, which improves the abrasion resistance and rigidity of the outer skin. It's Zahita b.

As will be explained based on drawing b showing a typical example, the observation type fender 1 has a cylindrical shape with bulging ends, and has an appropriate amount of silicon carbide voice force distributed on the outer surface. It has a layer of a rubbery elastic material, and a tensile strength reinforcing layer 4 such as a nylon cord is attached to the inner side of the layer to allow air to enter the inside. Reference numeral 5 denotes a metal fitting attached to both ends, to which a mooring cable 6 is tied, and the fender 1 is held horizontally at a predetermined position.

Silicon carbide small chair force is around 1μ in diameter and 50 in length.2
00μ is easily available on the market and is suitable.

The mixing ratio of the silicon carbide voice force of the rubbery elastic body is 2 to 2.
The reason why the range of 0% by weight was selected is that if the content is less than 2 m Ir%, the durability and rigidity of the fender will not be sufficiently increased, and even if the content exceeds 20% by weight, the effect will be
This is because the amount increases and becomes economically disadvantageous.

According to the present invention, a rubbery elastic body in which 6% by weight of silicon carbide voice force is dispersed in a butyl rubber composition, which is a conventional fender material, has a higher elasticity than one in which silicon carbide whiskers are not mixed. , In the wear test according to JIS K-6369, the wear was less than 1/10 1+11 "i:: Yes, and
A3 also showed similar excellent performance in the impact abrasion test.

So, when we built 11 fenders I as shown in the drawings and tried them out, we found that even without the conventional netting, there were fewer problems such as foreign objects getting caught in them, and they could be used for a much longer period of time and were highly durable. was recognized as lif.

[Brief explanation of the drawing]

The drawing is an LC diagram showing a main part of an embodiment of the present invention in cross section. 1... Fender material 3... Rubber elastic body 4... Tensile reinforcing layer 121 Applicant Daido Steel Co., Ltd. Representation agent Sou Suga Big

Claims (2)

[Claims] (1) 113 η for the fender with a layer of rubber elastic material on at least the outer surface, and 2-20 t as the rubber elastic material.
Distributed silicon carbide voice power of n'ffi%! lC
PI durable fender material characterized by using . (2) The durable fender according to claim '1, which is pneumatic and has a tension reinforcing layer inside.