'Self-reinforced' polymer is now commercial.The first commercial grade of Parmax SRP SRP - A data link layer protocol. (self-reinforced polymer) has been introduced by Mississippi Polymer Technologies, Inc. (MPT MPT Maryland Public Television MPT Modern Portfolio Theory (investing) MPT Ministry of Posts and Telecommunications MPT Message-Passing Toolkit MPT Master of Physical Therapy MPT Mitochondrial Permeability Transition ) in Bay St. Louis, Miss. SRP is a super-high performance, amorphous, rigid-rod copolymer copolymer: see polymer. family that offers stiffness, strength, hardness, heat resistance, and inherent flame resistance suitable for military, aerospace, electronic, and other demanding uses. It offers up to 300% higher tensile strength tensile strength Ratio of the maximum load a material can support without fracture when being stretched to the original area of a cross section of the material. When stresses less than the tensile strength are removed, a material completely or partially returns to its and modulus than existing thermoplastics. (For details, visit the Article Library on our website and see July '03 Close Up on Materials.) Parmax 1201 is a high-viscosity grade suitable for compression molding Compression molding is a method of molding in which the molding material, generally preheated, is first placed in an open, heated mold cavity. The mold is closed with a top force or plug member, pressure is applied to force the material into contact with all mold areas, and heat . It is supplied in irregular granules Granules Small packets of reactive chemicals stored within cells. Mentioned in: Allergic Rhinitis, Allergies with virtually no fines. The glass-transition temperature is 155 C (311 F), which allows for molding temperatures of 590 to 752 F. Optimal mechanical properties are achieved with 2000 psi of pressure and around 30-min residence times. Natural color is brown to black. Sample quantities currently cost over $100/lb, but by late summer pricing is expected to be around $35/lb (similar to PEEK). By early in 2005, MPT expects to launch additional SRP grades for profile extrusion and injection molding injection molding n. A manufacturing process for forming objects, as of plastic or metal, by heating the molding material to a fluid state and injecting it into a mold. . Tel: (228) 533-0825 * PT Direct: 598EF Properties of Compression Moldable Parmax SRP 1201 Density, g/cc 1.21 24-Hr Water Absorption, % 0.5 Tensile Strength, psi 30,000 Tensile Modulus, psi 1.2 million Flexural Yield Strength, psi 45,000 Flexural Modulus, psi 1.2 million Compressive Strength, psi 100,000 Notched Izod, ft-lb/in. 0.8 Unnotched Izod, ft-lb/in. 18.7 Rockwell K Hardness 80 HDT, F @ 66 psi 325 CTE, [10.sup.-5] m/m-[degrees]C 3.5-4.5 Dielectric Constant (1 MHz) 3.1 Dielectric Strength, kV/mil 6.44 Oxygen Index, % 42 UL 94 Rating V-0 |
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