制革常用复鞣剂对皮革中甲醛含量的影响

Effect of Common Retanning Agent on Formaldehyde Content in Leather

以山羊蓝湿革为原材料,采用8种复鞣剂:醛类复鞣剂A、D,氨基树脂类复鞣剂E、F、G,芳香族合成鞣剂C、H、B进行复鞣。试验过程中复鞣剂用量分别为0%、1%、2%、3%、4%,探究每种复鞣剂用量对皮革中甲醛含量的影响。由试验结果可以看出,随着复鞣剂.用量的增加,皮革中甲醛含量不断上升。当E、F、G复鞣剂用量大于2%时,皮革中甲醛含量较高,已经超出我国规定的直接与皮肤接触的皮革制品中甲醛残留量的标准。复鞣剂A、C、H、B用量小于3%时,皮革中甲醛含量达到婴儿用品中甲醛含量的标准。复鞣剂D用量小于4%时,皮革中甲醛含量符合中国和日本规定的直接与皮肤接触的皮革制品中甲醛残留量的标准。

The wet — blue goatskin leather were used as raw material,and eight retanning agents,including aldehydes retanning agent A and D,amino resin retanning agent E,F and G,aromatic synthetic tanning agent C,H and B were applied to retanning process.During the experiment,the amounts of retanning agent were 0%,1%,2%,3%,4%,respectively.The effects of the amount of each retanning agent on formaldehyde content in leather were studied.The results show that the formaldehyde content in leather increases with retanning agent dosage.When the dosage is more than 2%with E,F or G as retanning agent,the formaldehyde content in leather has exceeded the standard of formaldehyde residues in direct contact with the skin.When the dosage is less than 4%with A,C,H or B as retanning agent,the formaldehyde content in leather can meet the standard of formaldehyde content in baby products.When the dosage of D retanning agent is less than 4%,the formaldehyde content in leather can meet the standards of formaldehyde residues in direct contact with the skin in China and Japan.