Home Material
    Total Quality Management


Plastic is a synthetic material made from polymers, which are large molecules composed of repeating subunits. These forms can be liquid or paste like resins for embedding, coating, and adhesive bonding, or they can be moulded, laminated, or formed shapes, including sheet, film, or larger-mass bulk shapes.  It can be moulded into various shapes and forms, making it a versatile material widely used in electrical insulation, packaging, construction, and many other industries. Powermat uses two type of polymer, thermoplastic and thermoset plastics.

Thermoplastic: Plastics that can be deformed easily upon heating and can be bent easily. Linear polymers and a combination of linear and cross-linked polymers come under thermoplastics. Example: PVC, nylon, polythene, etc.

Thermosetting: Plastics that cannot be softened again by heating once they are moulded. Heavily cross-linked polymers come under the category of thermosetting plastics. Example: Bakelite, melamine, Sheet Moulding Compound & Dough Moulding Compound.



Thermoset Composite Material & its Moulding Technique

Composites are defined as “a combination of plastic resin and fibre reinforcement.” Another term for composites is used in the past is reinforced plastics.

Sheet Moulding Compound:

Sheet moulding compound (SMC) or sheet moulding composite is a ready to mould glass-fibre reinforced polyester material primarily used in compression moulding.[1] The sheet is provided in rolls weighing up to 100 kg. Alternatively, the resin and related materials may be mixed on site when a producer wants greater control over the chemistry and filler.



Sheet Moulding Compound (SMC) is a compression moulding compound often used for larger parts where higher mechanical strength is needed. SMC is a fibre reinforced thermoset material. Glass reinforcement is between 10% and 50%, and glass length is slightly longer than Dough Moulding Compound (DMC) - between 1/2-inch and 1-inch (25mm).

SMC Manufacturing ProcessThermoset Sheet Moulding Compound (SMC) is a mixture of polymer resin, inert fillers, fiber reinforcement, catalysts, pigments and stabilizers, release agents, and thickeners and possesses strong dielectric properties. Manufacture of sheet moulding compounds is a continuous in-line process. The material is sheathed both top and bottom with a polyethylene or nylon plastic film to prevent auto-adhesion. The paste is spread uniformly onto the bottom film. Chopped glass fibers are randomly deposited onto the paste. The top film is introduced and the sandwich is rolled into a pre-determined thickness. The sheet is allowed to mature for 48 hours.
Sheet moulding compounds can be moulded into complex shapes. Superior mechanical properties and surface appearance, plus excellent electrical insulation make this thermoset material ideal for automotive Class A body panels, high-strength electrical parts, business equipment cabinets, personal watercraft, and various structural components.


Dough Moulding Compound:

Dough Moulding Compound (DMC) is a thermoset plastic resin blend of various inert fillers, fiber reinforcement, catalysts, stabilizers, and pigments that form a viscous, `puttylike` moulding compound. DMC is highly filled and reinforced with short fibers. Glass reinforcement represents between 10% and 30%, with glass length typically between 6mm to 12mm.  Depending on the end-use application, dough moulding compounds are formulated to achieve close dimensional control, flame and track resistance, electrical insulation, corrosion and stain resistance, superior mechanical properties, low shrink, and colour stability. Its excellent flow characteristics, dielectric properties, and flame resistance make this thermoset material well-suited to a wide variety of applications requiring precision in detail and dimensions as well as high performance.



Basic raw materials are resins, additives, catalysts, mould release agents and fillers. For coloured compounds, a pigment is added to the paste.The paste is then mixed with fibres, usually glass fibres. Bulk Moulding Compound (BMC) is prepared in a mixer. After preparing a base paste it will be loaded into the mixing device. Then all other ingredients are added and homogenized. The compound is packed into bags until moulding. To avoid any material changes during storage and transport it is packaged in a styrene tight packaging.

Quality Certification

© 2024 Powermat India. All Rights Reserved by   | Help  | Privacy Policy |  Term of Use