Multi-ply dispersible nonwoven fabric
AssigneeSuominen Oyj
InventorAvinav G. Nandgaonkar
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Abstract
The invention relates to a nonwoven fabric material having sufficient strength to be used in a pre-moistened state but also having dispersibility properties which allow the product to be flushed. The material comprises at least two nonwoven webs, at least one of which is hydroentangled. Each of the individual webs comprise 50%-95% wood pulp and 5%-50% of short cut man-made fibers and/or natural fibers and has a basis weight of 20-100 gsm. After forming the webs, the two nonwoven webs are dried and then joined together by particle binders through size press or spraying. The particle binder joined webs separate into individual webs after flushing due to the breakage of particle binder-nonwoven hydrogen bond which makes the material highly dispersible.
Claims18
A nonwoven fabric material comprising:
- at least a first nonwoven web layer and a second nonwoven web layer, of which nonwoven web layers at least one is hydroentangled,
- wherein each of the first and second nonwoven web layers comprises a composition of 50%-95% by weight wood pulp and 5%-50% by weight synthetic fibers and/or natural fibers, and a basis weight of 20-100 gsm, the synthetic and/or natural fibers having a length of 5 to 15 mm, and
- wherein the first nonwoven web layer and the second nonwoven web layer are joined together by a binder solution comprising a composite of microcrystalline cellulose (MCC) and sodium carboxymethylcellulose (CMC) dispersed in water.
A method for forming a nonwoven fabric material comprising:
- applying a binder solution comprising a composite of microcrystalline cellulose (MCC) and sodium carboxymethylcellulose (CMC) dispersed in water to at least a first nonwoven web layer and a second nonwoven layer to join the first nonwoven web layer and the second nonwoven layer to one another, wherein at least one of the first nonwoven web layer or the second nonwoven web layer is hydroentangled,
- wherein each of the first and second nonwoven web layers comprises a composition of 50%-95% by weight wood pulp and 5%-50% by weight synthetic fibers and/or natural fibers, and a basis weight of 20-100 gsm, the synthetic and/or natural fibers having a length of 5 to 15 mm.
Dependencies are inferred from the claim text.