METHOD AND APPARATUS FOR MAKING A SPUNBOND FROM FILAMENTS

摘要

The invention relates to a device for producing a spun-bonded web from filaments, comprising spinnerets, a cooling chamber into which process air can be introduced in order to cool the filaments, a monomer suction device arranged between the spinnerets and the cooling chamber, a stretching unit, and a placing device for placing the filaments so as to form the spun-bonded web. The cooling chamber is divided into two cooling chamber portions. Process air can be suctioned out of a first upper cooling chamber portion to the monomer suction device with a volumetric flow rate Vm, and process air exits the first upper cooling chamber portion into a second lower cooling chamber portion with a volumetric flow rate V1. The volumetric flow rate ratio VM/V1 is 0.1 to 0.3.

主权项

1. An apparatus for making a spunbond web of filaments comprising:
a spinneret generating filaments in a direction, a cooling chamber subdivided into upper and lower compartments, means for introducing process air for cooling the filaments into the chamber, a monomer suction device between the spinneret and the cooling chamber, a stretcher downstream of the device, a deposition device downstream of the stretcher for depositing the filaments as the web, and recirculating means for withdrawing process air from the upper cooling compartment at a volumetric flow rate of VM, feeding a portion of the withdrawn process air to the monomer suction device and feeding another portion of the withdrawn process air at a volumetric flow rate V1 into the lower cooling compartment such that a volumetric flow-rate ratio VM/V1 is 0.1 to 0.35.