... . NSF,SGS,IAF,ISO CERTIFIEDPP yarn & Cotton yarnUpdated Time: 2012-11-301.)Brief AccountPolypropylene yarn is made from the premium polypropylene ... the wool,then spinning into the one-ply yarn (polypropylene yarn),which is the main material for manufacturing the wire wound filter cartridge ... 1g/m, 1.2g/m, 1.4g/m3.)Main technical parameter for Polypropylene yarn Color: white Size:1.8mm; Fiber length: 76 ...