Composite nonwoven sheet material
A non-woven and sheet technology, applied in the direction of non-woven fabrics, textiles and paper, synthetic resin layered products, etc., can solve the problems of poor liquid release ability, poor absorption capacity of wipes, etc.
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example 1
[0116] use figure 1 The apparatus shown produces a first example of a composite nonwoven sheet material. Spun polypropylene filaments 2 having a width of 0.4 m were laid on the endless forming fabric 1 at a speed of 15 m / min so that the filaments 2 were not bonded to each other. The web 3 of spun filaments 2 had a weight of 20 gsm. In the wet lay-up stage 5, an aqueous slurry or aqueous foam comprising pulp fibers 6 is wet laid on the web 3 of spun filaments 2, absorbing excess water. The wet laid pulp fiber 6 weighed 40 gsm. The resulting intermediate product 7 weighed 60 gsm and was moved to hydroentanglement stage 8 . Unbonded spun filaments 2 and wet-laid pulp fibers 6 were combined in two flow channels at a pressure of 40 bar using a single row of nozzles 9 (120 μm inlet holes and 0.6 mm pitch) at a speed of 15 m / min Together, supported by fabric 10 at the same time. The energy supply at the hydro-entanglement is about 178 kWh / ton of processed material. The resultin...
example 2
[0120] use figure 2 The apparatus shown produces a second example of a composite nonwoven sheet material. An aqueous slurry or aqueous foam comprising pulp fibers 6' is wet laid on the forming fabric 1'. The weight of the wet laid pulp fibers 6' was 40 gsm. The wet-laid pulp fiber web had a width of 0.4 m. Spun polypropylene filaments 2' are deposited on wet-laid pulp fibers 6'. The weight of the filaments was 20 gsm. Subsequently, Kuraray bicomponent fibers (3.3dtex x 5mm, 11 segments) comprising 17gsm of splittable polyethylene terephthalate (PET) / polyamide (PA) and 3gsm of Kelheim blue viscose A microfiber mixture 16' is wet laid on the first side of the intermediate structure. The resulting intermediate product 17' is hydroentangled in stage 18' in which the remaining splittable fibers are split and the fibrils 2', wet-laid pulp fibers 6' and microfibers 16' are combined with A single row of nozzles 19' (120 μm inlet holes and a pitch of 0.6 mm) was integrated in tw...
example 3
[0122] Use something like figure 2 Another example of making a composite nonwoven sheet material using the apparatus shown in . This example differs from Example 2 in that the microfibers are applied before the filaments are laid and the pulp fibers are applied after the filaments are laid. Thus, an aqueous slurry comprising microfibers 6' (such as PET / PA in stage 16' of Example 2) was wet laid on the forming fabric 1'. The width of the wet-laid microfiber web was 0.4 m. Spun polypropylene filaments 2' are deposited on microfibers 6'. The weight of the filaments was 20 gsm. Subsequently, pulp fibers 16' are foam laid on the first side of the intermediate structure. The resulting intermediate product 17' is subjected to hydroentanglement in stage 18' where the remaining splittable fibers are split and the fibrils 2', microfibers 6' and pulp fibers 16' are combined in two manifolds using a single The row of nozzles 19' is integrated at a pressure of 60 bar. The material 2...
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