Electrically conductive compositions and method for producing same
A conductive composition, the technology of the composition, applied in the direction of conductive materials dispersed in non-conductive inorganic materials, etc., can solve the problems of high clean room application, poor, slow processing costs, etc.
Inactive Publication Date: 2005-05-11
CARMEL OLEFINS
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Problems solved by technology
Better mechanical properties are obtained in fast production rate injection molding and complex geometries can be produced but the amount of conductive filler required is high
One disadvantage of compression molding of conductive compounds is their slow processing and high cost
[0010] Compounds based on prior art polymers for static dissipative and EMI shielding applications require high percentages of conductive additives to form conductive polymer compounds, resulting in high cost and poor processability and mechanical properties, as well as high carbon pollution Not good for especially clean room applications
Method used
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[0030] now refer to Figure 1 - Figure 1 is a schematic representation of the multi-component conductive thermoplastic composition of the present invention.
[0031] A multi-component conductive thermoplastic composition designated 10 includes a substrate 12 formed primarily of a first thermoplastic compound, fibers (such as glass fibers, carbon fibers, or organic fibers) and / or mineral fillers 14 coated with a second thermoplastic compound 16 , in and on the second thermoplastic compound 16 with the Figure 2A - Carbon black shown in the SEM micrograph of 2E. Such as figure 1 As shown in , the fibers and / or mineral filler 14 coated with the second thermoplastic composition 16 having carbon black thereon form a conductive network within the polypropylene matrix 12 .
[0032] In a preferred embodiment, the first thermoplastic component is a polymer-based component using polyolefins, polystyrene (PS), acrylonitrile / butadiene / styrene (ABS) terpolymers, polypara Butylene phtha...
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Abstract
An electrically conductive composition and method for its preparation, for example by injection molding. The composition comprises a base substantially comprising a first thermoplastic component, a second thermoplastic component having a higher polarity than the first thermoplastic component, the second thermoplastic component wrapping a plurality of fibers forming a baffle within the base The coated fibrous network, further comprising a carbon component which is preferably attracted to a second component such that the network is an electrically conductive network within the matrix.
Description
technical field [0001] The invention relates to electrically conductive composites based on mixtures of two thermoplastic compounds of different polarity with fibers and / or mineral fillers and carbon black and to a process for their preparation. Background technique [0002] Compositions based on conductive polymers are used in many industrial applications such as dissipating static charges from plastic parts and plastic cases to shield electronic parts from electromagnetic interference (EMI). Examples of electrostatic discharge (ESD) applications are electronic assemblies, clean room installations, storage disks, water carriers, chip enclosures and building components for explosion-proof environments. [0003] Compounds designed to dissipate static charges typically have a 10 2 to 10 13 ohms / square, and compounds used for shielding EMI applications typically exhibit 10 -2 to 10 2 Volume resistivity in ohm centimeters. [0004] Polymer based co...
Claims
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IPC IPC(8): H01B1/24C08K3/04C08F283/00C08K3/34C08K7/06C08K7/14C08L23/00C08L23/04C08L23/08C08L23/10C08L25/04C08L29/04C08L55/02C08L67/02C08L69/00C08L77/00
CPCC08F283/00C08L23/04C08L23/0861C08L23/10C08L25/04C08L25/06C08L25/18C08L29/04C08L55/02C08L77/00H01B1/24C08L2666/02C08L2666/20C08L2666/14C08L2666/04C08L2666/06C08L2666/24
Inventor M·纳基斯R·彻奥达科夫A·西格曼A·瓦克斯曼
Owner CARMEL OLEFINS