Spray application of additive composition to sheet materials
A composition and additive technology, which is applied in the direction of non-fiber pulp addition, pulp raw material addition process, coating, etc., can solve the problems of sheet product degradation, short processing time, and solvents are too late to fully evaporate, so as to reduce atomization viscosity, The effect of reducing waste
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example 1
[0105] The additive composition containing modified silicone softener and lotion is sprayed with carbon dioxide as compressed fluid, and UNICARB is used for spraying System Supply Unit, which is equipped with UNICARB Spray gun and nozzle tip including an orange-segment-shaped pre-orifice. 03-08, manufactured by Nordson. The liquid mixture was sprayed at a temperature of 60°C and a pressure of 1100 psi. A concentration of 20 wt% carbon dioxide provided a well atomized cone angle spray pattern. After increasing the CO2 concentration to 25%, a soft plume pattern is formed. After the carbon dioxide concentration is increased to 50%, a decompression jet with a very good spray pattern and fine atomization is formed. This high level of carbon dioxide enables uniform mixing with the additive composition and reduces application rates. Spray coating was done on tissue paper sheets with a very small but very uniform application of the additive composition.
example 2
[0107] Using the same equipment and spraying conditions as in Example 1, a liquid mixture containing 25% carbon dioxide was used to spray an additive composition comprising a modified lanolin softener and a lotion. This results in a decompressed spray jet with an excellent spray pattern, ie soft, wide spread and very uniform. Spraying was carried out on a tissue paper stock and the additive composition was applied very evenly in a very small amount. Then, the carbon dioxide concentration was increased to 50%, whereupon a two-phase liquid mixture was formed. This higher CO2 concentration reduced the measured spray rate from 76 to 46 g / min. The spray evenly applies the additive composition to the paper towel product.
example 3
[0109] Using the same equipment as in Example 1, the additive composition comprising quaternary ammonium salt was sprayed at a temperature of 60° C. and a pressure of 1100 psi using a liquid mixture of 20% carbon dioxide to form a good atomization and a uniform spray pattern. The concentration of carbon dioxide is increased to 40%, and after the pressure reaches 1500psi, a two-phase liquid mixture and a slightly wider spray pattern are formed. The additive composition was sprayed on the tissue paper sheet and in each case a uniform, very light application was achieved on the tissue paper sheet.
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