Production method of fluoride-free oil-proof paper

Abstract

The invention relates to a production method of fluoride-free oil-proof paper, which comprises the following steps: (1) preparing raw materials which comprise the following components in percentage bymass: 80%-95% of sulfate hardwood pulp and 5%-20% of sulfate softwood pulp; (2) respectively putting the sulfate softwood pulp and the sulfate softwood pulp pulp obtained in the step (1) into a pulper, injecting water for pulping to obtain sulfate softwood paper pulp and sulfate softwood paper pulp, and respectively pumping the sulfate softwood paper pulp and the sulfate softwood paper pulp intoa pulp mixing tank to form mixed paper pulp; (3) sequentially adding aluminum sulfate and alkyl ketene dimer into the slurry mixing tank, and stirring to obtain mixed slurry; and (4) preparing a coating liquid, wherein the coating liquid comprises the following components in percentage by mass: 35%-40% of surface adhesive starch, 30%-35% of polyvinyl alcohol and 25%-35% of sodium carboxymethyl cellulose. The production method is simple in production process and low in production cost, and the prepared fluoride-free oil-proof paper is good in water resistance and oil resistance, non-toxic, harmless, environment-friendly and practical.

Description

technical field [0001] The invention relates to the technical field of oil-proof paper, in particular to a production method of fluorine-free oil-proof paper. Background technique [0002] Grease-proof paper is a kind of functional paper with good resistance to oil penetration. Grease-proof paper is generally used in hamburger packaging, chicken wing packaging, chicken leg packaging, and can also be used as a substrate for post-processing of baking paper, steamer paper, and barbecue paper. Its oil-proof level The highest grade is 12, and the oil-proof grade of commonly used packaging greaseproof paper is grade 6. At present, most oil-proof papers on the market use carbon-6 oil-proof agent to treat the surface of the paper to achieve the oil-proof level. The principle is that the fluororesin has a small surface tension, which can effectively prevent the oil in the food from entering the paper. Migration, but carbon-6 oil repellent will produce harmful chemical components dur...

AI Technical Summary

Problems solved by technology

At present, most oil-proof papers on the market use carbon-6 oil-proof agent to treat the surface of the paper to achieve the oil-proof level. The principle is that the fluororesin has a small surface tension, which can effectively prevent the oil in the food from entering the paper. Migration, but carbon-6 oil repellent will produce harmful chemical components during use