Composite material with EMI shielding properties and process to produce it
摘要
說明書
The terms “virgin polymer” or “virgin resin” are used to denote a polymer or a resin directly obtained from a polymerization plant. The terms “virgin polypropylene” or “virgin polyethylene” are used to denote a polypropylene or a polyethylene directly obtained from a polymerization plant. The terms “directly obtained” is meant to include that the polypropylene or the polyethylene may optionally be passed through a pelletization step or an additivation step or both.
The terms “Post Consumer Resin”, which may be abbreviated as “PCR”, is used to denote a component of waste.
Throughout the present application the terms “polypropylene” and “propylene polymer” may be used synonymously. Similarly, the terms “polyethylene” and “ethylene polymer” may be used synonymously.
In the present disclosure, it is provided for a composite material suitable for use as EMI shielding material, remarkable in that it comprises:
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- a component A being a polymer resin which is at least one amorphous polymer resin or at least one semi-crystalline polymer resin selected from polyethylene resin and/or polypropylene resin;
- from 15.0 to 60.0 wt. % of component B being at least one metal-coated particle based on the total weight of the composite material; and
- from 0.5 to 5.0 wt. % of component C being one or more dispersants based on the total weight of the composite material; wherein one or more dispersants are selected from fatty acids, fatty acid derivatives, ethylene bis stearamide, functionalized waxes, maleic anhydride-grafted polymers and any mixture thereof;
