Thank you for your interest in TPG products. Search for the Term you require by using the links below.
Gel Point - The stage at which a liquid begins to exhibit pseudo-elastic properties.
Glass Transition Temperature (Tg) - The approximate midpoint of the temperature range over which the glass transition takes place.
Hardener - A substance or mixture of substances added to a material to increase or control the curing reaction by taking part in it.
Haze - The cloudy or turbid appearance of an otherwise transparent material caused by light scattered from within the specimen or from its surfaces.
Heat Stabilizers - These additives increase the ability of the material to withstand the negative effects of heat exposure. They are used to increase the overall service temperature of the material.
Homopolymer - A polymer resulting from polymerization involving a single monomer.
Impact Modifiers - Are additives used to enhance the material's ability to withstand the force of impact.
Inhibitor - A substance used in low concentration which suppresses a chemical reaction.
Injection Blow Molding - Blow molding process by which the plastic parison to be blown is formed by injection molding.
Injection Molding - The process of forming a material by forcing it from a heated cylinder, under pressure, through a sprue into a cavity of a confined mold.
Isotactic - Pertaining to a type of polymeric molecular structure containing a sequence of regularly spaced asymmetric atoms arranged in like configuration in a polymer chain.
Laminar Flow - Laminar flow of thermoplastic resins in a mold is accomplished by solidification of the layer in contact with the mold surface that acts as an insulating shell through which molten material flows to fill the remainder of the cavity.
Laminate - A product made by bonding together two or more layers of material or materials.
Light, UV Stabilizers, & Absorbers - These additives increase the ability of the material to withstand the negative effects of light and UV exposure, thus increasing the service life of the material.
Lubricant - Internal lubricants, without affecting the fusion properties of a compound, promote resin flow. External lubricants promote release from metals which aids in the smooth flow of melt over die surfaces.
Machine Shot Capacity - Refers to the maximum weight of thermoplastic resin which can be displaced or injected by the injection ram in a single stroke.
Masterbatch - A concentration of a substance (an additive, pigment, filler, etc.) in a base polymer.
Mat - A fibrous material consisting of randomly oriented chopped or swirled filaments loosely held together with a binder.
Moldability - The characteristics of being easy to mold without rupturing or developing flaws due to movement of the polymer during gelation.
Mold Release Agent - A lubricant used to coat a mold cavity to prevent adhesion of the mold piece when removed.
Monomer - A low molecular weight substance consisting of molecules capable of reacting with like or unlike molecules to form a polymer.
Odorants - Odorants are used to add odor to materials, usually for safety reasons.
Pimple - An imperfection; a small protuberance of varied shape of the surface of a plastic product.
Pit - An imperfection; a small crater in the surface of the plastic, with its width of approximately the same order of magnitude as its depth.
Plastic(s) - A material that contains as an essential ingredient one or more organic polymeric substances of large molecular weight, is solid in its finished state, and at some stage in its manufacture or processing into finished articles, can be shaped by flow.
Plasticizers - Are usually low-melting solids or high-boiling organic liquids which, when added to hard plastics, impart flexibility. They have varying degrees of softening action and solvating ability resulting from a reduction of intermolecular forces in the polymer.
Plastisol - Mixtures of plasticizers and resins which can be converted to continuous films by applying heat.
Polymer - High molecular weight organic compound, natural or synthetic, whose structure can be represented by a repeated small unit, the mer, e.g., polyethylene, rubber, cellulose. If two or more monomers are involved, a copolymer is obtained.
Polyol - An alcohol having many hydroxyl groups, also known as a polyhydric alcohol or polyalcohol.
Polyolefin - A polymer prepared by the polymerization of an olefin(s) as the sole monomer(s).
Pot Life - The period of time during which a reacting thermosetting composition remains suitable for its intended processing after mixing with reaction-initiating agents.
Preform - A coherent, shaped mass of powdered, granular, or fibrous plastic molding compound, or of fibrous filler material with or without resin.
Prepolymer - A polymer of degree of polymerization between that of the monomer or monomers and the final polymer.
Prepreg - In reinforced thermosetting plastics, the mixture of resin, reinforcements, fillers, etc., in web or filamentous form, ready for molding.
Processing Aids - Some processing aids include thixotropic agents, flattening agents, and blocking and anti-caking agents.
Neither TPG nor any of its affiliates makes any warranty, expressed or implied, or accepts any liability in connection with this information or its use. This information is furnished upon the condition that the person receiving it shall make his own tests to determine the suitability thereof for his particular purpose.
