Why does the bulging phenomenon occur in rubber expansion joints?
The rubber soft joint is made of inner rubber layer of curtain cloth and rubber bonding is not close enough, resulting in the inner rubber layer of curtain cloth and the surface layer of rubber leaving a gap, the inner layer of rubber containing rubber can not reach, in layman's terms, the composition of waste rubber is too much, confidentiality can not reach, when the product is installed on, water flows through the inner layer of rubber into the gap of the inner layer of curtain cloth, the surface layer of rubber containing rubber is very high, then the water will be between the curtain cloth and the surface layer of rubber The bulging phenomenon occurs, resulting in the bulging of the single ball rubber joint.
Rubber soft joints after the emergence of bulging have detailed points.
Because the recycled rubber can greatly reduce the cost and make the product very competitive on the inner rubber is not easy to be observed, so many small factories cut corners from the inner rubber, resulting in the sealing of the inner rubber is not up to standard and infiltrates the water into the cord fabric.
Rubber soft joint cord cloth are wrapped in the inner layer, all kang to, many small factories think that this can be done above the cord cloth compound rubber almost, that is, the rubber content is lower, from which profits and reduce costs, so that the water of the pipe to the cord cloth this layer of defense is not to play a sealing performance, water or from the impurities in the rubber leaked to the cord cloth layer and the surface rubber bell.
In order to win the approval of customers and the market, many small manufacturers produce rubber joints with a high rubber content on the surface of the rubber joint. Many customers will pull this rubber hair by hand, and simply try the rubber quality of the rubber joint with their own hand prongs, many small factories make the surface rubber good for this psychology of customers, and customers will pull this rubber hair by hand when they get the single-ball rubber joint in their hands, and feel the tension is good, the quality is good, so The surface rubber now plays a protective layer to isolate the water completely, at this time the surface rubber is only the rubber component, the rubber layer is very thin, there is no cord fabric skeleton layer to bear the pressure, there will be bulging phenomenon.
