Static shielding film

Claim 2

A flexible sheet material being adapted for packaging an electronic component and being sufficiently transparent to enable visual identification of said component through said sheet material, said sheet material comprising: (a) self-supporting electrically insulating film; said film having upper and lower major surfaces; (b) an electrically conductive layer carried by said upper surface of said film; (c) an antistatic layer carried by said lower surface of said film, said antistatic layer comprising a polymer having dispersed therein a fluoroaliphaticsulfonamide polyether compound which imparts to said antistatic layer a surface resistivity in the range of 10 7 to 10 14 ohms per square; wherein said polyether compound is of the formula ##STR17## where y and n are each in the range of 0 to 100; wherein y+n is at least 2; wherein R is hydrogen, alkyl, aryl, aralkyl, aminoalkyl, or hydroxyalkyl; wherein R'' and R'''are selected from ethylene and propylene; and wherein R' is alkyl, aryl, aralkyl, alkaryl, aminoalkyl, hydroxyalkyl, or perfluorosulfonamido; and (d) a tie layer secured to said lower surface of said film; wherein said antistatic layer is secured to said tie layer.

Claim 3

A flexible sheet material in accordance with claim 1, wherein said tie layer comprises an acrylate polymer having a volume resistivity of at least 10 10 ohm-centimeters.

Claim 4

A flexible sheet material in accordance with claim 1, wherein said polymer in said antistatic layer comprises a thermoplastic heat sealable polymer.

Claim 5

A flexible sheet material in accordance with claim 3, wherein said polyether compound is present in said antistatic layer in an amount of 0.05% to 10% by weight.

Claim 6

A flexible sheet material in accordance with claim 1, wherein said antistatic layer further comprises a non-ionic polyether surfactant.

Claim 7

An envelope adapted to receive and protect an electronic component, said envelope having walls formed of a flexible material having first and second major surfaces, said first surface defining an outer surface of the envelope and said second surface defining an inner surface of the envelope, wherein said material comprises: (a) a self-supporting electrically insulating film having a volume resistivity of at least about 10 10 ohm-centimeters; said film having upper and lower major surfaces; (b) an electrically conductive layer carried by said upper surface of said film; said conductive layer providing a surface resistivity no greater than 10 4 ohms per square; (c) an antistatic layer carried by said lower surface of said film, said antistatic layer comprising a polymer having dispersed therein a fluoroaliphaticsulfonamide polyether compound, wherein said antistatic layer provides a surface resistivity in the range of 10 7 to 10 14 ohms per square; wherein said polyether compound is of the formula ##STR18## where y and n are each in the range of 0 to 100; wherein y+n is at least 2; wherein R is hydrogen, alkyl, aryl, aralkyl, aminoalkayl, or hydroxyalkyl; wherein R'' and R''' are selected from ethylene and propylene; and wherein R' is alkyl, aryl, aralkyl, alkaryl, aminoalkyl, hydroxyalkyl, or perfluorosulfonamido; and (d) a tie layer secured to said lower surface of said film; wherein said antistatic layer is secured to said tie layer.

Claim 8

An envelope adapted to receive and protect an electronic component, said envelope having walls formed of a flexible material having first and second major surfaces, said first surface defining an outer surface of the envelope and said second surface defining an inner surface of the envelope, wherein said material comprises: (a) a self-supporting electrically insulating film having a volume resistivity of at least about 10 10 ohm-centimeters; said film having upper and lower major surfaces; (b) an electrically conductive layer carried by said upper surface of said film; said conductive layer providing a surface resistivity no greater than 10 4 ohms per square; (c) an antistatic layer carried by said lower surface of said film, said antistatic layer comprising a polymer having dispersed therein a fluoroaliphaticsulfonamide polyether compound, wherein said antistatic layer provides a surface resistivity in the range of 10 7 to 10 14 ohms per square; wherein said polyether compound is of the formula ##STR18## where y and n are each in the range of 0 to 100; wherein y+n is at least 2; wherein R is hydrogen, alkyl, aryl, aralkyl, aminoalkayl, or hydroxyalkyl; wherein R'' and R''' are selected from ethylene and propylene; and wherein R' is alkyl, aryl, aralkyl, alkaryl, aminoalkyl, hydroxyalkyl, or perfluorosulfonamido; and (d) a tie layer secured to said lower surface of said film; wherein said antistatic layer is secured to said tie layer.

Claim 9

An envelope in accordance with claim 6, wherein said polymer in said antistatic layer comprises a thermoplastic heat sealable polymer.

Claim 10

An envelope in accordance with claim 6, wherein said tie layer comprises an acrylate polymer having a volume resistivity of at least 10 10 ohm-centimeters.

Claim 11

An envelope in accordance with claim 8, wherein said acrylate polymer is selected from the group consisting of ethylene/acrylic acid copolymers and ethylene/methacrylic acid copolymers.

Claim 12

An envelope in accordance with claim 6, wherein said polyether compound is present in said antistatic layer in an amount of 0.05% to 10% by weight.

Claim 13

An envelope in accordance with claim 6, wherein said antistatic layer further comprises a non-ionic polyether surfactant.

Claim 14

An envelope in accordance with claim 6, further comprising an abrasion-resistant layer over said electrically conductive layer.

Claim 15

A flexible sheet material in accordance with claim 1, further comprising an abrasion-resistant layer over said electrically conductive layer.

Claim 16

A flexible sheet material in accordance with claim 1, wherein said electrically insulating film comprises polyester and has a thickness in the range of about 10 to 50 microns.

Claim 17

A flexible sheet material in accordance with claim 3, wherein said antistatic layer comprises low density polyethylene and ##STR19## where y and n are each in the range of 2 to 20.

Claim 18

An envelope in accordance with claim 6, wherein said antistatic layer comprises low density polyethylene and ##STR20## wherein y and n are each in the range of 2 to 20.

Claim 19

A flexible sheet material being adapted for packaging an electronic component and being sufficiently transparent to enable visual identification of said component through said sheet material, said sheet material comprising: (a) self-supporting electrically insulating film; said film having upper and lower major surfaces; (b) an electrically conductive layer carried by said upper surface of said film; (c) an antistatic layer carried by said lower surface of said film, said antistatic layer comprising a polymer having dispersed therein a fluoroaliphaticsulfonamide polyether compound which imparts to said antistatic layer a surface resistivity in the range of 10 7 to 10 14 ohms per square; wherein said polyether compound is of the formula ##STR21## where y and n are each in the range of 0 to 100; wherein y+n is at least 2; wherein R is hydrogen, alkyl, aryl, aralkyl, aminoalkyl, or hydroxyalkyl; wherein R 1 is alkyl; wherein R'' and R''' are selected from ethylene and propylene; and wherein R' is alkoxy; and (d) a tie layer secured to said lower surface of said film; wherein said antistatic layer is secured to said tie layer.

Claim 20

A flexible sheet material being adapted for packaging an electronic component and being sufficiently transparent to enable visual identification of said component through said sheet material, said sheet material comprising: (a) self-supporting electrically insulating film; said film having upper and lower major surfaces; (b) an electrically conductive layer carried by said upper surface of said film; (c) an antistatic layer carried by said lower surface of said film, said antistatic layer comprising a polymer having dispersed therein a fluoroaliphaticsulfonamide polyether compound which imparts to said antistatic layer a surface resistivity in the range of 10 7 to 10 14 ohms per square; wherein said polyether compound is of the formula ##STR21## where y and n are each in the range of 0 to 100; wherein y+n is at least 2; wherein R is hydrogen, alkyl, aryl, aralkyl, aminoalkyl, or hydroxyalkyl; wherein R 1 is alkyl; wherein R'' and R''' are selected from ethylene and propylene; and wherein R' is alkoxy; and (d) a tie layer secured to said lower surface of said film; wherein said antistatic layer is secured to said tie layer.

Claim 21

An envelope adapted to receive and protect an electronic component, said envelope having walls formed of a flexible material having first and second major surfaces, said first surface defining an outer surface of the envelope and said second surface defining an inner surface of the envelope, wherein said material comprises: (a) a self-supporting electrically insulating film having a volume resistivity of at least about 10 10 ohm-centimeters; said film having upper and lower major surfaces; (b) an electrically conductive layer carried by said upper surface of said film; said conductive layer providing a surface resistivity no greater than 10 4 ohms per square; (c) an antistatic layer carried by said lower surface of said film, said antistatic layer comprising a polymer having dispersed therein a fluoroaliphaticsulfonamide polyether compound, wherein said antistatic layer provides a surface resistivity in the range of 10 7 to 10 14 ohms per square; ##STR22## where y and n are each in the range of 0 to 100; wherein y+n is at least 2; wherein R is hydrogen, alkyl, aryl, aralkyl, aminoalkyl, or hydroxyalkyl; wherein R 1 is alkyl; wherein R'' and R''' are selected from ethylene and propylene; and wherein R' is alkoxy; and (d) a tie layer secured to said lower surface of said film; wherein said antistatic layer is secured to said tie layer.

Claim 22

An envelope adapted to receive and protect an electronic component, said envelope having walls formed of a flexible material having first and second major surfaces, said first surface defining an outer surface of the envelope and said second surface defining an inner surface of the envelope, wherein said material comprises: (a) a self-supporting electrically insulating film having a volume resistivity of at least about 10 10 ohm-centimeters; said film having upper and lower major surfaces; (b) an electrically conductive layer carried by said upper surface of said film; said conductive layer providing a surface resistivity no greater than 10 4 ohms per square; (c) an antistatic layer carried by said lower surface of said film, said antistatic layer comprising a polymer having dispersed therein a fluoroaliphaticsulfonamide polyether compound, wherein said antistatic layer provides a surface resistivity in the range of 10 7 to 10 14 ohms per square; ##STR22## where y and n are each in the range of 0 to 100; wherein y+n is at least 2; wherein R is hydrogen, alkyl, aryl, aralkyl, aminoalkyl, or hydroxyalkyl; wherein R 1 is alkyl; wherein R'' and R''' are selected from ethylene and propylene; and wherein R' is alkoxy; and (d) a tie layer secured to said lower surface of said film; wherein said antistatic layer is secured to said tie layer.