METHOD AND DEVICE FOR PRODUCING COMPOSITE NONWOVENS BY MEANSOF HYDRODYNAMIC NEEDLING

摘要

A known method exists for producing a composite nonwoven from at least one carded nonwoven and a wood pulp layer placed on said carded nonwoven, for producing a hygiene product. According to this method, the carded nonwoven is hydrody--namically needled before the pulp layer is applied in order to increase the resistance of the nonwoven. However this means that the nonwoven is wet when the pulp layer is applied. The moisture is disadvantageous for the circulation and therefore, the distribution of the pulp. The carded nonwoven still has to be consolidated in order to achie ve sufficient resistance to wear by friction. According to the invention, this problem is solved by subjecting the carded nonwoven to action by air or calendering the carded nonwoven before it is coated with the super-absorbent material in order to pre-consolidate said carded nonwoven. The wood pulp layer is applied and the two are then consolidated together by hydrodynamic water needling and dried. This may be followed by additional calendering.