Antistatic thermoplastic/polyamide-polyether compositions and antistatic polymeric films made therefrom
AssigneeW. R. Grace & Co.-Conn.
InventorMarvin R. Havens
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Abstract
Disclosed is a film having antistatic characteristics and a method to make the film. The film comprises a blend of polyether block amide copolymer with an aromatic sulfonamide antistatic agent.
Claims28
An antistatic film comprising at least one layer comprising a blend of a polyether block amide copolymer having a degree of hydrophilicity suitable for packaging electronic devices in admixture with an aromatic sulfonamide antistatic agent, wherein said aromatic sulfonamide is substantially non-hygroscopic and substantially non-migratable.
As a composition of matter adapted for use to produce thermoplastic polymeric film having antistatic characteristics, a polyether block amide copolymer blend comprising a polyether block amide copolymer in admixture with an aromatic sulfonamide antistatic agent, wherein said aromatic sulfonamide is substantially non-hygroscopic and substantially non-migratable.
A method for protecting packaged static sensitive devices from electrostatic charges comprising:
- (a) providing a package comprising an antistatic film having at least one layer comprising a blend of a polyether block amide copolymer in admixture with an aromatic sulfonamide antistatic agent, wherein said aromatic sulfonamide is substantially non-hygroscopic and substantially non-migratable;
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- (b) enclosing said film about a selected device.
A film having anti-static properties comprising at least the structure polyolefin/polyether block amide copolymer+aromatic sulfonamide antistatic agent/polyether block amide copolymer+aromatic sulfonamide antistatic agent/polyolefin, in air cushion form.
An antistatic film comprising a layer of a major amount by weight of a polyether block amide copolymer having nylon 12 as its polyamide component and polytetramethylene oxide as its polyether component, and a minor amount by weight of aromatic sulfonamide.
Dependencies are inferred from the claim text.