|
|
|
|
Glossary of
Abbreviations & Plastics Terms |
 What does that mean?!
Find out here in the CTS Plastics Glossary...
Your source for the most up-to-date terms, definitions, abbreviations
and acronyms for and about plastics and processing.
Click on the letters below to browse alphabetically through the
glossary. |
|
|
|
Term |
Definition |
|
ABA
|
Acrylonitrile-butadiene-acrylate
|
|
Ablative Plastics
|
This description applies to a material which absorbs heat (while part of it is being consumed by heat) through a decomposition process known as pyrolysis, which takes place in the near surface layer exposed to heat.
|
|
Abrasive Wear
|
Wear caused by the continual contact, under pressure of hard particles in the resins against the barrel lining, screw and valve components. The abrasive particles may be fillers or reinforcements, such as fibreglass, calcium carbonate, powdered metals and others.
|
|
ABS
|
Acrylonitrile-butadiene-styrene (an amorphous copolymer)
|
|
ABS
|
Anti-lock Braking System
|
|
Absolute Viscosity
|
Of a fluid, the tangential force on unit area of either of two parallel planes at unit distance apart when the space between the planes is filled with the fluid in question and one of the planes moves with unit differential velocity in its own plane.
The C.G.S unit for absolute (or dynamic) viscosity is the poise (dyne-sec./sq.cm.). The centipoise (0.01 poise is often used.
|
|
Accelerator
|
A substance that hastens a reaction, particularly one which speeds up the vulcanisation of rubber. Also known as Promoter.
|
|
Accumulator
|
A term used mainly with reference to blow moulding equipment which designates an auxiliary ram extruder which is used to provide extremely fast parison delivery. The accumulator cylinder is filled with plasticated melt coming from the extruder between parison deliveries or shots and is stored or accumulated until the plunger is required to delivery the next parison.
|
|
Acetal
|
An engineering thermoplastic introduced to industry in 1956 as a potential replacement for die-cast metals. Acetal resins are produced by the polymerization of purified formaldehyde [CH2O] into both homopolymer and copolymer types. Industrial end-users are very familiar with the acetals in the form of gears, bearings, bushings, cams, housings, conveyors and any number of moving parts in appliances, business machines, etc., Consumers may be more familiar with applications such as automotive door handles, seat belt components, plumbing fixtures, shaver cartridges, zippers and gas tank caps. Acetals are extremely rigid without being brittle. They have a high melting point, high strength, good frictional properties and resistance to fatigue.
|
|
Acetal Resins
|
The molecular structure of the polymer is that of a linear acetal, consisting of unbranched polyoxymethylene chains.
|
|
Acrylic Ester
|
An ester of acrylic acid, or of a structural derivative of acrylic acid, e.g., methyl methacrylate.
|
|
Acrylic Resin
|
A synthetic resin prepared from acrylic acid or from a derivative of acrylic acid.
|
|
Acrylics
|
Were introduced in 1936 in the form of hard, rigid and transparent materials. Acrylics were used in World War II as aircraft canopies. Other applications include: lighting diffusers; outdoor signs; automobile tail lights; washbasins and sinks; safety shields; furniture (e.g., tables); skylights, and large-area enclosures for shopping centers, swimming pools, restaurants, etc., and as room dividers. The outstanding resistance to long-term exposure to sunlight and weathering is one of the more important characteristics of acrylic. Also notable is the exceptional clarity and good light transmission (cast acrylic sheet transmits about 92% total light). Acrylics are a family of thermoplastic resins of acrylic esters [CH2CHCOOR] or methacrylic esters [CH2C(CH3)COOR]. The acrylates may be methyl, ethyl, butyl, or 2-ethylhexyl. Usual methacrylates are the methyl, ethyl, butyl, laural and stearyl.
|
|
Acrylonitrile
|
A monomer with the structure (CH2:CHCN). It is most useful in copolymers. Its copolymer with butadiene is nitrile rubber, and several copolymers with styrene exist that are tougher than polystyrene. It is also used as a synthetic fiber and as a chemical intermediate.
|
|
Acrylonitrile-Butadiene-Styrene (ABS)
|
Chemically, this family of thermoplastics are called terpolymers, because they are made of three different monomers: acrylonitrile, butadiene and styrene, to create a single material that draws on the best properties of all three. ABS was introduced to the market in 1948, primarily as a result of activities that had taken place during the war years in the development of synthetic rubbers. ABS possesses outstanding impact strength and high mechanical strength, which makes it suitable for use in tough consumer and industrial products, including: appliances, automotive parts, pipe, business machines and telephone components. In the 1960s, ABS found wide outlet as a substrate for metallizing (i.e., applying a chrome-like metallic finish to the plastic) and appeared in such products as shower heads, door handles, faucet handles and automotive front grilles. A class of thermoplastic terpolymers including a range of resins, all prepared with usually more than 50% styrene [C6H5CHCH2] and varying amounts of acrylonitrile [CH2CHCN] and butadiene [CH2CHCHCH2]. The three components are combined by a variety of methods involving polymerization, graft copolymerization, physical mixtures and combinations thereof.
|
|
Acrylontrile-Butadienestyrene
|
Acyrlonitrile and styrene liquids and butadiene gas are polymerized together in a variety of ratios to produce the family of ABS resins.
|
|
ACS
|
Acrylonitrile cholorinate polyethylene and styrene
|
|
Addition Polymerization
|
Polymerization in which monomers are linked together without the splitting off of water or other simple molecules.
|
|
Additive
|
A substance compounded into a resin to modify its characteristics (i.e. intestates, stabilizers, plasticizers, flame retardants, etc.).
|
|
Adhesion Promoter
|
A coating which is applied to the substrate before it is extrusion coated with the plastic and which improves the adhesion of the plastic to the substrate.
|
Page 1 of 4
[1 2 3 4]
|
|
|
|
|
