|0.4 to 0.7 g/cm3
|70 deg C
|Upto 50 %
|Country of Origin
|Made in India
Due to our expertise in this realm, we are providing a comprehensive series of Closed Cell Sponge Rubber
. Experts can also make this product as per the requirements of the clients.
Closed cell rubbers are made by incorporating gas forming ingredients in the rubber compound, or by subjecting the compound to high-pressure gas such as nitrogen. Expanded rubbers are manufactured in sheet, strip, molded and special shapes by molding or extruding.
Closed cell sheets are generally made rectangular and of sufficient thickness to be split into several layers for die-cutting. From this use is derived, for economic reasons, the term "skin one side or no sides, our option". Closer tolerances can usually be maintained on split sheets (no skin surfaces) than on sheets with a natural skin. Unless otherwise specified, the presence of the skin on the top or bottom surfaces of sheet and strip expanded rubber is optional. Die-cut parts will have exposed cells on all cut edges. In parts where exposed cell surfaces cannot be tolerated (appearance or abrasion, etc.) this should always be so specified.
Extruded closed cell rubber is made by extruding the raw compound through a die which determines the shape of the section. The extruded stock is carried from the die by a conveyor system in a continuous process through vulcanizing chambers. As it moves through the vulcanizing chambers the heat causes the blowing agent to decompose to produce an inert gas which expands the extrusion.Characteristics of Extruded Closed Cell Rubber are:
- The surface of the extruded section has a natural skin formed during vulcanization.
- It is possible to produce the part in continuous lengths.
- A great variety of complex and irregular shapes may be produced.
- Air chambers or hollowed-out designs may be utilized, giving the advantage of the reduction in weight of the material.
- The design engineer, by properly designing the cross-section with maximum air chamber space, can generally achieve a considerable advantage in terms of performance and compression deflection.
Molded closed cell parts are manufactured similarly to open cell molded sponge. They require venting of trapped air and possibly the use of inert dusting powder which is difficult to remove completely from the surface of the finished part.
Distinct advantages of closed cell products are their low water absorption characteristics, providing a tight seal and the ability to conform to curves, corners, and varying cross-sections without bridging or creasing. This is attributable to the closed cells which do not collapse, losing air as in open cell sponge, and yet deform sufficiently to conform tightly to irregular surfaces. Its thermal value is utilized in insulation applications.