Sheet moulding compounds (SMC) are fibre-reinforced thermosetting semi-finished products. They are produced in thin uncured and thickened sheets for easy handling. To a larger extent, SMC is a generic term that designates such types of compounds, together with the process to convert them into large composite parts.
SMC compounds include short, discontinuous, fibres that are impregnated between two layers of a resin paste. The resin paste consists of a mixture of thermosetting resin, fillers (calcium carbonate, alumina, etc.), and additives such as initiators, inhibitors, thickeners, mould release agents, and low profile additives (LPAs).
The resin paste is thickened before moulding: the paste viscosity is increased so that the SMC is a ‘‘putty-like’’ material. This is a fundamental point of the SMC technology concept, which allows the sheets to be easily handled and the paste to drift the fibres during compression moulding.
This feature makes a clear distinction between SMC and other comparable thermosetting compounds such as bulk moulding compound.
Orthophthalate Resin for SMC Application ORCHEM TM – 232
Isophthalate Resin for SMC Application ORCHEM TM – 808
Isophthalate Resin for SMC Application ORCHEM TM – 907
Special Resin for CLASS A – SMC application ORCHEM TM – 730
LOW PROFILE ADDITIVE ORADD LPA 01
LOW PROFILE ADDITIVE ORADD LPA 02
INNOVATION IN Low Profile Additives FOR
Orson has developed an automotive low profile additives ORADD LPA 03 specially designed to meet class a category required by various auto manufacturers.
Salient Features of Our Products
Early applications of SMC can be found in the European and Japanese markets in the 1960s. SMC was introduced in the US market in 1965. Today, they are used worldwide and represent a major part of the world’s thermoset composites. There is a large diversity of fields of applications for SMC.