Properties static dissipative

Reiaforced plastics may also iaclude fillers (qv), which are iaexpeasive materials such as calcium carboaate used to displace resia and reduce cost curing agents (catalysts), promoters, inhibitors, and accelerators, which affect thermosetting resia cure colorants release agents (qv) to faciUtate removal from the mold and other additives which can impart a wide variety of properties to the finished part, such as fire resistance, electrical conductivity, static dissipation, and ultraviolet resistance. 

The texturing sheet may also contain a plastic coating that transfers to the laminate surface during the laminating process to provide special surface properties. The caul plate itself may be smooth or textured and act directly as the release. Immediately beneath this release sheet, there may be a decorative layer or a ply that imparts special properties such as a metallic foil for electrical conductivity or a static dissipating layer. If the decorative layer is a printed... 

Marsh CA, Backx G, Ernst MH (1997) Static and dynamic properties of dissipative particle dynamics. Phys Rev 56 1676-1691... 

Fillers may decrease thermal conductivity. The best insulation properties of composites are obtained with hollow spherical particles as a filler. Conversely, metal powders and other thermally conductive materials substantially increase the dissipation of thermal energy. Volume resistivity, static dissipation and other electrical properties can be influenced by the choice of filler. Conductive fillers in powder or fiber form, metal coated plastics and metal coated ceramics will increase the conductivity. Many fillers increase the electric resistivity. These are used in electric cable insulations. Ionic conductivity can be modified by silica fillers. 

In addition to their primary function as mechanical property modifier, the high electrical conductivity of carbon fibers provides carbon-based composites with static dissipation and radio frequency shielding characteristics. This opens up a whole range of applications and with carbon nanotubes this can be achieved at enormously low loading levels. One application with future potential is the use of carbon... 

Various approaches have been suggested to reduce the number of fires at petrol filling stations caused by static electricity. One suggestion is metal door handles. Conducting additives are used to provide static dissipation in fuel systems, but there are difficulties in achieving adequate mechanical properties in polyethylene fuel tanks when carbon black is used as a filler. Doubts have also been raised in some quarters about whether some plastic fuel tanks will be able to meet the requirements for PZEVs , or partial zero emissions vehicles, required by California s new emission standards. Inergy Automotive recommends capless filler systems with locking mechanisms. Carbon nanotubes are likely to find a role in antistatic protection. 

With sheet or pipe, multilayer coextrusion can be used. Solid outer-solid core coextrusion can place an ABS grade on the outside that has special attributes such as color, dullness, chemical resistance, static dissipation, or fire-retardancy over a core ABS that is less expensive or even regrind. Composites can be created in which the core optimizes desired physical properties such as modulus, whereas the outer layer optimizes surface considerations not inherent in the core material. Solid outer-foam core can provide composites with significant reductions in specific gravity (0.7). Dry blowing agents can be dusted onto the pellets or liquid agents injected into the first transition section of the extruder. 

Glycolube AFA-1 also inqparts outstanding static dissipation properties to PVC films. A 1.5 phr loading provides static properties sufficient to meet NFPA code 99 specifications. As shown in the data, conventional additives are unable to provide this level of protection even when used at higher loadings. 

When deciding on new footwear, workers should first check with their employer to see if there are any specific requirements for their footwear, like static dissipating properties. 

Antistatic. The terms antistatic and static-dissipative have been used synonymously in the literature. They usually refer to the property of a material that inhibits triboelectric charging [52]. Antistatic has also been defined as a property of a material having a surface resistivity of at least 1 X 10 but less than 1 x 10 fl/D. 

Static-dissipative. The property of a material having a surface resistivity of at least 1 x 10 / / or a volume resistivity of 1 x 10 /7-cm but less than I X 10 /2/n surface resistivity or 1 x 10"/7-cm volume resistivity. 

Table 5.13 Tribological Properties of RTP Company ESD 800 Static Dissipative (Base Polymer POM-Co Celanese Celcon M90) Versus 1018 C Steel...

The fuel, ozone, low temperature, and weathering resistance of epichlorohydrin are ideal properties for a curb pump hose. In addition, the static dissipative properties, especially when a conductive carbon black is used, add to the safety of the hose. The EPA low-fuel vapor transmission requirements may dictate an FKM veneer lining, to which GECO will adhere, as well as being a low fuel transmission elastomer itself. Hose components are shown in Table 7.25. 

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