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US 4,066,576 AGranted
Polyethylene mixture for the manufacture of semiconductive films for bags and sacks
AssigneeHoechst Aktiengesellschaft
InventorsSiegfried Bork, Georg Sam
Life of this patent
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Abstract
Mixtures of a low density polyethylene, a rubber and a highly conductive carbon black can be processed to films having an especially low surface resistance.
Claims15
A polyethylene mixture for the manufacture of semi-conductive films for bags and sacks having a surface resistance of less than 10.sup.6 .OMEGA. and good mechanical properties, which contains
- a. from 60 to 84% by weight of polyethylene having a density of 0.915-0.930 g/cm.sup.3, or of a copolymer of ethylene containing up to 5% by weight of comonomers,
- b. from 7.5 to 30% by weight of a saturated or weakly unsarated rubber, and
- c. from 8.5 to 15% by weight of carbon black,
- and optionally usual additives such as stabilizers, procesing auxiliaries or lubricants, wherein the carbon black has a BET surface of from 300 to 1500 m.sup.2 /g, an oil absorption of from 2.5 to 6.5 ml/g, a content of volatile substances of from 0.1 to 6.0% by weight, a pH of from 7 to 10, and an ash content of from 0.5 to 5.0% by weight.
1 more element
Dependencies are inferred from the claim text.