Production method of natural cellulose membrane

Abstract

The invention discloses a production method of natural cellulose membranes, comprising the following steps: (a) immersion; (b) squeezing; (c) grinding; (d) maturing; (e) etiolation; (f) solution; (g) film formation; (h) desulfuration; (i) bleaching; (j) plastification; and (k) drying. The production method has the advantages of mild reaction condition, short spacings among the prepared natural cellulose membranes, stable expansion rate and tensile strength, proper stiffness and flexibility, better colour and luster, good transparence, high hygiene property, and the like, improves the surface property of paper through the plastification, in particular enhances the smoothness of paper surfaces, improves the printability, reduces the deformability of paper and the moisture absorption, thereby reaching the new requirement of modern printing and packaging.

Description

technical field

[0001] The invention relates to the field of chemical materials, in particular to a production method of a natural cellulose film. Background technique

[0002] Natural cellulose membranes have excellent properties such as environmental protection and non-toxicity. For example, Chinese invention patent 90109250.9 discloses a new method for preparing regenerated cellulose membranes using cotton stalks and peanut shells. After hydrolyzing cotton stalks and peanut shells with 4.5-5% nitric acid solution, and then treating them with NaOH, the cellulose content of cotton stalks is 90%, and Mn=1.56×10 5 And peanut shell cellulose content is 91%, Mn=1.52×10 5 , and then configure cellulose cuproammonia solution, after filtering and scraping the film, solidify and form in dilute alkali and dilute acid.

[0003] However, the methods in the prior art to prepare the natural cellulose film have unsatisfactory indexes such as smoothness and strength. Contents of the i...

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