By M. C. Hough, R. Dolbey
A accomplished selection of professionally confirmed, comparative info, at the most generally used plastics fabrics. The Plastics Compendium covers thermoplastics, thermosets, composites and thermoplastic elastomers.
The houses and processability of plastics fabrics are topic to a few affects. elements comparable to chemical structure, molecular weight and measure of crystallinity are in actual fact of basic significance, yet they don't inform the complete tale. advertisement grades of plastics include reinforcing brokers and fillers, plasticisers and lubricants, which could increase one element of a material's functionality while diminishing one other. exact information at the functionality of the main extensively to be had changed grades are hence crucial whilst specifying fabrics for ever extra challenging purposes. The relative expenditures of fabrics can also be major while huge creation runs are deliberate or if a couple of fabrics meet the necessary functionality standards. these kinds of points are addressed within the Plastics Compendium; a distinct source from Rapra expertise restricted.
Volume 1 of The Plastics Compendium comprises in actual fact awarded info on 351 regularly occurring and transformed fabric varieties, within the following major sections:
Property and advertisement facts sheets
An alphabetical alternate identify index
A directory of providers’ (or their agents’) addresses, including cellphone, telex and fax numbers, in as much as 15 eu nations and america
A certain alphabetical index to the fabrics for which facts are indexed.
The estate and advertisement facts sheets offer 3 sorts of info:
Textual info provided within the kind of merits, risks and standard functions
Materials information; directory values of 24 key homes (where acceptable) for all 351 fabrics (including mechanical and electric houses, flammability, prompt fabric drying time and moulding temperature, mold shrinkage, greatest working temperature, water absorption and value) resource info; directory providers and their exchange names
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Additional resources for Plastics Compendium, 1
Compared with other modified grades of alkyd. DISADVANTAGES: Lowest tensile strength, flexural modulus, elongation at break, notched impact strength, mould shrinkage and HDT compared with other modified grades of alkyd. APPLICATIONS: Lamp holders, sockets, relay bases, switches, coil formers and brush holders. Encapsulation of capacitors, resistors and diodes. G. 9 Max. Operating Temp. 6 Vol. Resist. log ohmcm 14 Strain at Yield % N/A Dielect. 02 Dielect. const. 80 MPa °C 210 Matl. drying hrs @ °C 6 @ 30 Melt temp.
Components with snap fits. Chemical pumps. Bathroom scales. Telephone key pads, pulley wheels, housings for domestic appliances, shower heads, fuel expansion tanks. Toys. G. 41 Max. Operating Temp. 58 Oxygen index % 15 Elongation at break % 65 Vol. Resist. log ohmcm 15 20 Strain at Yield % 8 Dielect. 069 Dielect. const. 80 MPa °C 110 Matl. drying hrs @ °C 3 @ 90 Melt temp. 8 Mould temp. range °C 60 - 120 14 Acetal TRADE NAMES: BEETLE ACETAL BIP Plastics CELCON Hoechst DELRIN ST DuPont FULTON LNP Engineering Plastics HOSTAFORM Hoechst KEMATAL Hoechst LATAN Lati RTP 805 RTP TENAC-C4510 Asahi Chemical THERMOFIL ACETAL Thermofil ULTRAFORM BASF Acetal (POM) (Polyoxymethylene): Copolymer; 30% carbon fibre reinforced ADVANTAGES: Significantly increased flexural modulus, moderate increase in tensile strength and HDT compared with unmodified Acetal.
Operating Temp. 8 Oxygen index % 19 Elongation at break % 80 Vol. Resist. log ohmcm 17 Strain at Yield % 5 Dielect. 55 Dielect. const. 80 MPa °C 122 Matl. drying hrs @ °C 2 @ 90 Melt temp. 7 Mould temp. E. High HDT at 150°C/300°F. Better toughness than Polysulphone. Can be electroplated. DISADVANTAGES: Increased cost compared to ABS. APPLICATIONS: Electrical connectors, components for relays, switch housings, plated plumbing parts, food service trays. G. 14 Max. Operating Temp. 7 Vol. Resist. 4 Dielect.