SHEET MOULDING COMPOUND PROCESS

SHEET MOULDING COMPOUND PROCESS

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.

OUR PRODUCTS

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
SMC APPLICATION

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

  • Good Physical and mechanical properties in the solid-state
  • Good Weatherability
  • Short curing time
  • High thermomechanical properties for enhanced resistance
    to corrosion
  • Can be combined with low profile additives to produce parts with excellent surface quality and physical properties.
  • Excellent strain resistance for better performance in outdoor applications

Typical Applications

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.

  • The automotive and truck industries remain the drivers of the SMC technology
  • Rail and Marine – Interior and body parts, watercraft parts, etc.
  • Electrical – Low voltage and medium voltage energy systems, fuses and switchgear, cabinet and junction, boxes, electrical components with reduced surface resistivity, lamp housings
  • Energy – Parts of wind turbine and solar power applications, etc., sanitary sinks and bathtubs, toilet seats, drain covers, etc.
  • Domestic appliance – Blower housings, drain pans, and heating, ventilation, and air conditioning (HVAC) systems, vent trims, swimming pool panels, etc.
  • Building and construction – Drinking water tanks, panels, doors, etc.
  • Medical – Surgery equipment, dental medication systems, antibacterial components sectors.