Anti-static protective garment

• US 7,093,307 B1
• Filed: 09/25/2003
• Issued: 08/22/2006
• Est. Priority Date: 09/25/2003
• Status: Expired due to Fees

• Current Assignee: Lakeland Industries Incorporated
• Original Assignee: Lakeland Industries Incorporated
• Inventors: Smith, W. Novis
• Primary Examiner(s): PATEL, TAJASH D
• Application Number:
  US10/671,401
• Time in Patent Office: 1,062 Days
• Field of Search: 245/7, 245/8, 2/211, 2/214, 2 8/1, 290/1, 290/4, 428 361- 367, 442/255, 442/261, 442/1, 442/20, 442/327, 442/41, 442/50
• US Class Current: 2/457
• CPC Class Codes: A41D 13/12 Surgeons' or patients' gowns or dresses operating gloves A61B42/10

Abstract

Disposable chemical and biological protective garments have an internal film or coating of conductive and water absorbing inorganic salts which are antistatic agents activated by the internal humidity generated by the wearer.

Claims

1. In a biological and chemical protective garment having an exterior and interior polymeric film surface, the improvement which comprises that the interior of said garment has coating of an antistatic effective amount of a conductive inorganic salt selected from the group consisting of a water-absorbing salt and a hygroscopic salt, said garment comprising about 0.1 to 10% by weight of said garment.

2. The protective garment of claim 1 wherein said garment has the internal portion of an outer film layer coated with said inorganic salt.

3. The protective garment of claim 1 wherein said garment has an interior non-woven scrim containing said inorganic salt.

4. The protective garment of claim 3 wherein said scrim is attached to an outer film layer with a pressure sensitive adhesive containing an antistatic agent so as to form an electrical bridge.

5. The protective garment of claim 3 wherein said scrim is spin bonded or melt spun and a powder of said inorganic salt is applied.

6. The protective garment of claim 3 wherein said scrim comprises about 10 to 25 mg per m² of said inorganic salts.

7. The protective garment of claim 1 comprising 10 to 25 mg per m² of the interior film surface of said garment of said salt.

8. The protective garment of claim 1 wherein said inorganic salt is selected from the group consisting of alkali metal salts, alkaline earth metal salts, boric acid, and hydrates thereof.

9. The protective garment of claim 1 wherein said inorganic salt is selected from the group consisting of sodium sulfate, calcium sulfate, calcium acetate, magnesium acetate, magnesium sulfate, magnesium, chloride, lithium chloride and the hydrates thereof.

10. The protective garment of claim 1 wherein said garment comprises a film layer selected from the group consisting of polyolefin, polymethacrylate, ionomer, polyvinyl alcohol and polyethylene terephthalate.

11. A chemical and biologically protective garment comprising:

a) and outer-polymeric film, and

b) a non-woven scrim adhesively attached on the interior of said outer film, said scrim comprising an antistatic effective amount of a water absorbing and conductive inorganic salt or hydrates thereof, which antistatic effect is further activated by the humidity within said garment generated by a wearer.

12. The protective garment of claim 11 wherein said scrim comprises a non-woven web having about 0.1 to 25 mg per m² of said inorganic salt.

13. The protective garment of claim 12 wherein said scrim comprises a polyolefin.

14. The protective garment of claim 11 wherein said scrim is adhesively attached to said outer polymeric film with a pressure sensitive adhesive containing an effective amount of an anti-static agent to form an electrically conductive bridge.

15. A method for providing a protective garment with antistatic properties which comprise including on the internal portion of said garment an antistatic effective amount of a water absorbing and conductive inorganic salt or its hydrate which is further activated by the humidity generated by a wearer to provide an antistatic and fire resistant effect.

16. The method of claim 15 wherein said inorganic salt comprises about 0.1 to 10% by weight of said garment.

17. The method of claim 15 wherein said inorganic salt is incorporated in a scrim of said garment.

18. The method of claim 15 wherein said inorganic salt is selected from the group consisting of alkali metal salts, boric acid and the hydrates thereof.