Water/Oil Repellent And Foam Finishing Of Industrial Filter Cloth

Foam finishing is a new clean finishing techniques, because the technology has to save energy, reduce emissions, repeat and can be recycled, etc. so it has broad prospects for development and economic benefits. Foam finishing means that the water used in the finishing liquor are replaced by much air, which can inflate the concentrated solution of finishing liquor or dyeing liquor into foam. Then the foam spreads on the fabric surface and permeates in the inner of fabrics, along with the uniform distribution of chemical reagents.Firstly, the article has made a detailed description about the technology of foam finishing,then took different foaming finishing to deal with two different filter cloth, comparing various foam finishing with conventional padding finishing effect.the article combined single factor and orthogonal experiment method.Performance of foam system:(1) Study of the performance of foaming agent:when the SDS was 10%, the temperature of foaming was about 30℃, the speed of stirring was 1000r/min,the time of stirring was 5min, the concentration of the inorganic salt sodium chloride was0.5%, the performance of the foaming agent was the best.(2) The performance of foam stabilizer: one was that CMC was foam stabilizer alone, when the concentration was 3%, the foaming ratio was 1: 3.5, the half-time was 4.5h,the viscosity was 3700 Mpa?s, foam density was 0.318 g?cm-3, the system performance was the best; the other was that CMC was the Primary thickener, SA and HEC was coordinate,when the concentration of CMC was 2%, the concentration of SA was 0.5% and the concentration of HEC was 0.5%, the viscosity of the system was 4000mPa?s, foam density was 0.279 g?cm-3, the foaming ratio was 1:4, the half-time was 4h.Water/oil repellent and foam finishing of Woven polypropylene filter fabric:(1) by orthogonal experiment and single factor analysis, the optimum process of direct foam finishing was as follows:when the mass fraction of TF-4105 was 50%, the mass fraction of SDS was 8%,the mass fraction of CMC was 4%, the mass fraction of Adhesive was 5%, the baking temperature was 130℃, the baking time was 5min, the contact angle of water was104.14 °, the contact angle of oil was 104.53 °.(2) after plasma treatment, treated filter fabricwith the aforementioned direct foam finishing optimal process, the optimal process determined by single factor was as follows: when the vacuum degree of plasma treatment was0.05 MPa, the time of plasma treatment was 5min, the mass fraction of TF-4105 was 50%, the mass fraction of SDS was 8%,the mass fraction of CMC was 4%, the mass fraction of Adhesive was 5%, the baking temperature was 130℃, the baking time was 5min, the contact angle of water was 108.12 °, the contact angle of oil was 109.13 °.Water/oil repellent and foam finishing of Non-woven polyester fabric filter:(1) the optimum process of direct foam finishing was as follows: :when the mass fraction of fluoridated water and oil repellent finishing agent TF-4105 was 50%, the mass fraction of SDS was 10%,the mass fraction of CMC was 2%, the mass fraction of SA was 1%, the mass fraction of HEC was 1%, the mass fraction of Adhesive was 5%, the baking temperature was140℃, the baking time was 5min, the contact angle of water was 103.97 °, the contact angle of oil was 102.08 °.(2) the optimal process of non-woven Polyester filter cloth processed by plasma was as follows: when the time of plasma treatment was 3min, the vacuum degree of plasma treatment was 0.04 MPa, the mass fraction of fluoridated water and oil repellent finishing agent TF-4105 was 50%, the mass fraction of SDS was 10%, the mass fraction of CMC was 2%, the mass fraction of SA was 1%, the mass fraction of HEC was 1%, the mass fraction of Adhesive was 5%, the baking temperature was 140℃, the baking time was 5min,the contact angle of water was 105.24 °, the contact angle of oil was 102.59 °.(3) the optimal process of non-woven Polyester filter cloth processed by alkali deweighting was as follows:when the concentration of Alkali was 7%, the treatment temperature was 90℃, the treatment time was 60 min, the mass fraction of fluoridated water and oil repellent finishing agent TF-4105 was 50%, the mass fraction of SDS was 10%, the mass fraction of CMC was2%, the mass fraction of SA was 1%, the mass fraction of HEC was 1%, the mass fraction of Adhesive was 5%, the baking temperature was 140 ℃, the baking time was 5min, the contact angle of water was 108.59 °, the contact angle of oil was 107.73 °.