Aqueous ethyl cellulose dispersion
There is provided an aqueous dispersion comprising 40-90 wt-% ethyl cellulose and 10-50 wt-% at least one plasticizer, and to a film having water barrier property produced from the dispersion. Additionally, there is provided a fiber based substrate comprising at least one film layer produced from the aqueous dispersion.
1 . A fiber based substrate comprising at least one film layer on at least one surface of the fiber based substrate, wherein the film layer is produced from an aqueous dispersion comprising 0.1-20 wt-% at least one pigment material, 40-85 wt-% ethyl cellulose, and 10-50 wt-% at least one plasticizer based on total dry weight of the dispersion, wherein the total solids content of the dispersion is more than 30%, wherein D50 particle size of the ethyl cellulose is 10 nm-2 μm, and wherein the plasticizer comprises dibutyl sebacate, butyl stearate, castor oil, butyl stearate, polyethylene glycol and acetylated monoglycerides or mixtures thereof; wherein the fiber based substrate comprises an additional film layer on at least one surface of the substrate, wherein the additional film layer is a grease barrier selected from a water soluble cellulose derivative, an oxygen barrier, a mineral oil barrier or an aroma barrier; wherein the film layer comprises at least one additional agent comprising hydrophobic agent, wax, water retention and rheology modifier, defoamer, surfactants, lubricants, surface active agents or a mixture thereof; and wherein transition temperature (Tg) of the dispersion is −20° C.-50° C.
2 . The fiber based substrate according to claim 1 , wherein the fiber based substrate comprises fiber based packaging materials.
3 . The fiber based substrate according to claim 1 , wherein D50 particle size of the ethyl cellulose is 50 nm-1 μm.
4 . The fiber based substrate according to claim 1 , wherein the plasticizer has solubility to water less than 100 g/l.
5 . The fiber based substrate according to claim 1 , wherein a single layer of the film layer has weight of 0.5-30 g/m2.
6 . An aqueous dispersion comprising 0.1-20 wt-% at least one pigment material, 40-85 wt-% ethyl cellulose, and 10-50 wt-% at least one plasticizer, based on total dry weight of the dispersion, and additionally at least one additional agent comprising hydrophobic agent, wax, water retention and rheology modifier, defoamer, surfactants, lubricants, surface active agents or a mixture thereof, wherein the total solids content of the dispersion is more than 30%, wherein D50 particle size of the ethyl cellulose is 10 nm-2 μm, wherein the plasticizer comprises dibutyl sebacate, butyl stearate, castor oil, butyl stearate, polyethylene glycol and acetylated monoglycerides or mixtures thereof; and wherein transition temperature (Tg) of the dispersion is −20° C.-50° C.
7 . The aqueous dispersion according to claim 6 , wherein D50 particle size of the ethyl cellulose is 50 nm-1 μm.
8 . The aqueous dispersion according to claim 6 , wherein the plasticizer has solubility to water less than 100 g/l.
9 . A film produced from an aqueous dispersion comprising 0.1-20 wt-% at least one pigment material, 40-85 wt-% ethyl cellulose, and 10-50 wt-% at least one plasticizer based on total dry weight of the dispersion, and additionally at most 20 wt-% additional agent, based on total dry weight of the film, wherein the total solids content of the dispersion is more than 30%, wherein D50 particle size of the ethyl cellulose is 10 nm-2 μm, wherein the plasticizer comprises dibutyl sebacate, butyl stearate, castor oil, butyl stearate, polyethylene glycol and acetylated monoglycerides or mixtures thereof; wherein the film comprises at least one additional agent comprising hydrophobic agent, wax, water retention and rheology modifier, defoamer, surfactants, lubricants, surface active agents or a mixture thereof; and wherein transition temperature (Tg) of the dispersion is −20° C.-50° C.