Soil-repellent monofilament for paper machine wire-cloths, production thereof and use thereof

DETAILED DESCRIPTION The object of the invention is to provide a wire-cloth for a paper machine with soil-repellent monofilaments which meets the high requirements of an industrial cloth in respect of its chemical, soil-repellent, mechanical and abrasion-resistant properties and finds use in particular in the dryer part of a paper machine wire-cloth.
In keeping with these features and with others which will become apparent hereinafter, one feature of the present invention resides, briefly stated, in a wire-cloth for paper machine comprising a plurality of soil-repellent monofilaments containing at least 85% by weight of polyethylene terephthalate having a viscosity index of at least 96 dl/g and 1.
5 to 5% by weight of a polynary copolymer prepared from ethene and tetrafluoroethene, wherein the soil-repellent monofilament has a diameter from 0.
2 to 0.
7 mm and a soiling index <2 after five soiling and washing cycles.
When the wire-cloth is produced in accordance with the present invention, it provides the above mentioned highly advantageous results.
The novel features which are considered as characteristic for the invention are set forth in particular in the appended claims.
The invention itself, however, both as to its construction and its method of operation, together with additional objects and advantages thereof, will be best understood from the following description of specific embodiments when read in connection with the accompanying drawings.