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A METHOD OF MANUFACTURING A FILM HAVING LOW OXYGEN TRANSMISSION RATE VALUES
A METHOD OF MANUFACTURING A FILM HAVING LOW OXYGEN TRANSMISSION RATE VALUES
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机译:一种制造具有低氧传输速率值的薄膜的方法
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摘要
A method of manufacturing a film having an oxygen transmission rate (OTR) value in the range of 0.1 to 200 cc/m2*24 h at 23° C., 50% relative humidity (RH), and an OTR value in the range of 0.1 to 2000 cc/m2*24 h at 38° C. at 85% RH, comprising at least 60% by weight nanocellulose based on the weight of the total amount of fibers in the film, wherein the method comprises the steps of, providing an aqueous suspension comprising said nanocellulose; forming a web from said aqueous suspension; calendering said web at a line load of at least 40 kN/m, and at a temperature of at least 60° C. wherein said film is formed and said web has an OTR value in the range of 50 to 10 000 cc/m2*24 h at 23° C., 50% RH before said calendering step, or more preferably in the range of 500 to 5000 cc/m2*24 h at 23° C., 50% RH before said calendering step.
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机译:在23℃,50%相对湿度(RH)的范围内,在0.1至200cc / m2 * 24h的范围内的氧传输速率(OTR)值的制造方法,以及在范围内在85%RH下在38℃下为0.1至2000cc / m 2 * 24h,基于薄膜中的纤维总量的重量,其中至少60重量%的纳米纤维素,其中该方法包括步骤,提供包含所述纳米纤维素的水性悬浮液;从所述水性悬浮液形成纸纸;在至少40kN / m的线负荷下压延所述纤维网,并且在至少60℃的温度下,其中形成所述薄膜,并且所述纤维网具有50至10 000cc / m2的otr值。在所述压延步骤之前23℃,50%RH在23℃下,或更优选在所述压延步骤之前在23℃,50%RH的500至5000cc / m 2×24h的范围内。
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