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Main mineral fillers

Filler Main mineral (crystalline phase) Chemical composition (simplistic formulae used for the silicates, see individual entries for details) Shape... [Pg.56]

The main mineral fillers (in terms of quantity applied) are kaolin (hydrous), GCC, PCC and talc. [Pg.44]

Ester plasticizers are used mainly in very polar elastomers, such as neoprene and nitrile mbber, to improve low or high temperature performance or impart particular oil or solvent resistance to a compound 5—40 parts are commonly used (see Plasticizers). Resins and tars are added to impart tack, soften the compound, improve flow, and in some cases improve filler wetting out, as is the case with organic resins in mineral-filled SBR. Resinous substances are also used as processing agents for homogenizing elastomer blends. [Pg.245]

The mineral muscovite, mainly an orthosilicate of aluminium and potassium, finely ground and used as a lubricant in rubber moulding and as an extended filler in latex compounds. [Pg.39]

Matting can be obtained by adding special mineral fillers, another secondary polymer that is miscible to a greater or lesser degree with the main polymer, or proprietary additives. [Pg.209]

Calcium carbonate is the most widely used filler mineral in the world. Its success is mainly due to its availability and also its suitability for a large range of applications. [Pg.38]

First introduced industrially in the 1930s, thermoplastic polymers are today produced and consumed in vast quantities and play a major role in many aspects of our everyday lives. It is estimated that over 16 million tons were consumed in Western Europe alone in 1991 [1]. Mineral fillers have, since the beginning, made an important contribution to the spectacular growth of thermoplastic polymers. The addition of mineral materials was initially seen mainly as a means of extending or reducing the compound cost but, as the relative cost of the polymers decreased, this became less important and attention was more and more focused on the property improvements that could be achieved. [Pg.69]

In calculating the effect of fillers on costs one must remember that polymers are generally used by volume, while both filler and polymer costs are usually quoted by weight. Most mineral fillers are considerably denser than polymers (usually 2-3 times) and hence their effective cost is considerably higher than appears at first sight. Some idea of the equivalent volume cost for fillers in the main thermoplastic polymers is given in Table 1, using estimated 1996 European price levels. [Pg.70]

This is mainly important in determining the rate at which composites will heat up and cool down during moulding processes. The specific heat of most mineral fillers is about half that of thermoplastics, but when this is converted to the more appropriate volume basis, it is found that there is little difference between fillers and polymers. [Pg.86]

A natural mineral filler containing mainly huntite and hydromagnesite, has been used, together with a blend of antimony trioxide and decabromodiphenyl oxide to reduce the flammability of an ethylene-propylene copolymer.72... [Pg.177]

Tribasic calcium phosphate is widely used as a capsule diluent and tablet filler/binder in either direct-compression or wet-granulation processes. The primary bonding mechanism in compaction is plastic deformation. As with dibasic calcium phosphate, a lubricant and a disintegrant should usually be incorporated in capsule or tablet formulations that include tribasic calcium phosphate. In some cases tribasic calcium phosphate has been used as a disintegrant. It is most widely used in vitamin and mineral preparations as a filler and as a binder. It is a source of both calcium and phosphorus, the two main osteogenic minerals for bone health. The bioavailability of the calcium is well known to be improved by the presence of cholecalciferol. Recent research reports that combinations of tribasic calcium phosphate and vitamin D3 are a cost-effective advance in bone fracture prevention. ... [Pg.100]

Apparently, none of WPC manufacturers adds calcium carbonate as a filler in then-products. LDl Composites, which use Biodac that consists of about 25% CaC03 and 25% of kaolin (clay), also did not use individual minerals as fillers. Nevertheless, there are many publications, mainly by suppliers of minerals and university researchers, describing benefits of calcium carbonate in WPCs. [Pg.133]

Apparently, the main reasons why WPC manufacturers do not use mineral fillers are product cost and wearing of the processing equipment. Many WPC manufacturers struggle to keep cost of materials as low as possible and try to minimize equipment maintenance and repair cost by all means. [Pg.156]

Generally, there is a certain correlation between density, on the one hand, and flexural strength and modulus, on the other, for many other materials, and that correlation is not related to porosity. For example, there is a strong correlation (R = 0.984) between density of all 38 polyethylene materials, listed in Table 7.49 of Chapter 7, including LDPE, LLDPE, HDPE, and their flexural modulus (Figure 6.1). Besides, mineral fillers in WPC materials increase density of the final product and also increase its flexural modulus. However, this chapter is mainly concerned about relationships between density and properties of WPC having the same formulation but produced at different regimes. [Pg.205]


See other pages where Main mineral fillers is mentioned: [Pg.4]    [Pg.209]    [Pg.610]    [Pg.549]    [Pg.44]    [Pg.1228]    [Pg.289]    [Pg.233]    [Pg.313]    [Pg.273]    [Pg.127]    [Pg.168]    [Pg.27]    [Pg.132]    [Pg.144]    [Pg.74]    [Pg.233]    [Pg.313]    [Pg.74]    [Pg.88]    [Pg.110]    [Pg.273]    [Pg.4]    [Pg.315]    [Pg.705]    [Pg.125]    [Pg.254]    [Pg.537]    [Pg.537]    [Pg.76]    [Pg.127]    [Pg.50]    [Pg.59]    [Pg.433]   
See also in sourсe #XX -- [ Pg.44 ]




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