1) Combine three layers of non-woven fabric. Three different non-woven fabrics were placed on the fixed support on the production line and neatly stacked together by the laminator above. There is a trumpet-shaped feeding port here, and a string of wires is continuously passed through the trumpet to the laminating machine.
Non-woven filters were dipped for 2 h into an aqueous solution of PEI (4.4 or 8.8% w/v) and sodium chloride (0.2 mol L −1) at pH 6. After treatment, the filters were left to drip, washed with water under mild mechanical stirring, and air-dried at room temperature.
The face masks can be divided into a flat face mask, three-dimensional face mask or folding face mask including non woven surgical mask and disposable non woven face mask cup type face mask according to their appearance. The flat non-woven face mask is one of the most widely used types in our daily work . The structure of non-woven face mask is
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Feb 01, 2018 · The physical and degradation properties of starch-graft-acrylonitrile/carboxylated nitrile butadiene rubber latex films. PubMed. Misman, M A; Azura, A R; Hamid, Z A A
Patent Journal No 8, 01 Aug 2011, Vol - Government Gazett
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