A sheet or web comprising a substrate which is composed of or coated with a hydrophobic resin and carries an antistatic layer, characterised in that the antistatic layer consists essentially of a blockcopolyetherester of dibasic carboxylic acid(s) esterified with ethylene glycol and with a polyoxyethylene glycol having an average molecular weight in the range 1,000 to 10,000, at least 20 % by weight of such blockcopolyetherester being constituted by polyoxyethylene-ester chain parts.
一种片材或卷材,包括由疏
水性
树脂组成或涂布有疏
水性
树脂并带有抗静电层的基材,其特征在于抗静电层主要由与
乙二醇和聚氧
乙烯乙二醇酯化的二元
羧酸嵌段聚醚酯组成,
乙二醇和聚氧
乙烯乙二醇的平均分子量在 1,000 至 10,000 之间,这种嵌段聚醚酯至少有 20% 的重量是由聚氧
乙烯酯链部分构成的。