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EMR/RFR/MWR body shield composition

  • US 5,115,140 A
  • Filed: 01/24/1991
  • Issued: 05/19/1992
  • Est. Priority Date: 01/24/1991
  • Status: Expired due to Fees
First Claim
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1. Wearing apparel for shielding a wearer from electromagnetic or radio frequency or microwave radiation produced by electronic equipment;

  • wherein the apparel comprises a shell of flexible material containing a flexible insert having a copper-based coating applied thereon in an amount sufficient to shield the wearer from the electromagnetic, radio frequency or microwave radiation;

    the insert being made by the following steps;

    (a) preparing electroless plated copper, which comprises the following steps in the order named;

    (i) adding to an alcohol reaction bath copper particles to a concentration of about 25% to about 35% w/v relative to the alcohol component;

    (ii) adding distilled water in an amount of about 200.00% to about 300.00% w/v relative to the alcohol component;

    (iii) adding a non-ionic surfactant to a concentration of about 0.0009% to 0.06% w/v relative to the alcohol component;

    (iv) adding a dilute acid to a concentration of about 0.5% to about 2.0% w/v relative to the alcohol component;

    (v) adding an anionic surfactant to a concentration of about 0.050% to about 0.100% w/v relative to the alcohol component;

    (vi) adding a plating metal to a concentration of about 1.0% to about 4.5% w/v relative to the alcohol component to produce plate copper particles;

    (vii) collecting the plated copper particles by filtration;

    (Viii) washing the treated copper with water;

    (ix) washing the plated copper particles with alcohol;

    (x) adding the plated copper particles to a solvent base resin to produce a plated copper/resin mixture having a plated copper particle to resin ratio of about 0.5;

    1 to about 8;

    1, and(b) applying the plated copper/resin mixture to a substrate.

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