Yarn fiber reinforced double-layer tubular filtering membrane and method for preparing same
A tubular filtration and yarn fiber technology, applied in chemical instruments and methods, membrane technology, semi-permeable membrane separation, etc., can solve the problems of peeling, shedding, compression resistance and blast resistance without obvious improvement, and achieve safety. The effect of improvement, good strength and separation
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Embodiment 1
[0061] Specific steps:
[0062] (1) Preparation of the casting solution of the first polymer film: PVC (PVC 1300, 12wt%) with a degree of polymerization of 1300, a molecular weight of 4 × 10 4 PVP (PVP K30, 1.2wt%), PEG400 (4wt%), H 2 O (0.5wt%) and DMAC (82.3wt%) were stirred at 70°C for 24 hours and then filtered, defoamed at 70°C and left to stand for use; the preparation of the casting solution of the second polymer film: the degree of polymerization was 1300 PVC (PVC 1300, 18wt%), molecular weight 4×10 4 PVP (PVP K30, 1.8wt%), PEG400 (4wt%), H 2 O (0.5wt%) and DMAC (75.7wt%) were stirred at 70°C for 24 hours, then filtered, defoamed at 70°C and left to stand for use.
[0063] (2) Double-layer co-extrusion integrated film formation: the polyester fiber (6) is penetrated into the casting solution channel (B) of the first polymer film of the spinneret, and fixed on the film in advance along the spinning line Silk collection device. Core fluid (40℃H 2 O), the casting so...
Embodiment 2
[0068] Concrete steps are with embodiment 1, and the concrete parameter of making film is as follows table:
[0069]
Embodiment 3
[0071] Concrete steps are with embodiment 1, and the concrete parameter of making film is as follows table:
[0072]
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