Preparing method of table salt packaging paper

A manufacturing method, technology of wrapping paper, applied in the direction of paper, papermaking, paper coating, etc.

Active Publication Date: 2018-08-31
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Europe and the United States, salt packaging paper has been widely used in the packaging of 1kg of salt, but most of the domestic salt packaging uses plastic packaging, and a small par

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] After the bleached softwood kraft pulp is crushed in a hydraulic pulper, it is beaten by three double-disc mills in series with a beating concentration of 4.5%. After beating, the beating degree of bleached softwood kraft pulp is 59. o SR, wet weight 7.5 g, enters the pulp pond after softwood knock. At the same time, the bleached kraft hardwood pulp is crushed in another hydraulic pulper, and then beaten by two double-disc mills in series, with a beating concentration of 4.5%. After beating, the bleached kraft hardwood pulp has a beating degree of 33 o SR, wet weight 2.5 g, enters the pulp pond after the hardwood knock. Through the pulping system, automatic pulping is carried out according to the mass ratio of softwood pulp: hardwood pulp of 55:45. After the pulp is mixed evenly, it enters the slurry flow system. Dilute to 2.5% and enter the grit ditch with magnetite to remove metal impurities in the slurry system; the slurry is diluted by the slurry pump and then enters ...

Embodiment 2

[0020] After the bleached softwood kraft pulp is crushed in a hydraulic pulper, it is beaten by three double-disc mills in series with a beating concentration of 4.5%. After beating, the beating degree of bleached softwood kraft pulp is 60. o SR, wet weight 7.3 g, enters the pulp pond after conifer knock. At the same time, the bleached kraft hardwood pulp is crushed in another hydraulic pulper, and then be beaten by two double-disc mills in series with a beating concentration of 4.5%. After beating, the bleached kraft hardwood pulp has a beating degree of 34 o SR, wet weight 2.4 g, enters the pulp pond after the hardwood knock. Through the pulping system, automatic pulping is carried out according to the mass ratio of softwood pulp: hardwood pulp of 55:45. After the pulp is mixed evenly, it enters the slurry flow system. Dilute to 2.5% and enter the grit ditch with magnetite to remove metal impurities in the slurry system; the slurry is diluted by the slurry pump and then enters...

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Abstract

The invention discloses a preparing method of table salt packaging paper. The method includes the steps of using high-quality bleaching sulfate needle-point leaf pulp and bleaching sulfate broad leafpulp as the raw materials, and conducting pulping and auxiliary material adding, wet page making, squeeze-dewatering, pre-drying, surface sizing, post-drying and the like to prepare the table salt packaging paper large in gram weight, high in opaqueness, tensile strength, bursting strength and tearing strength, small in breathability, high in moisture resistance and free of fluorescent substances.The product quality reaches the performance index of import similar products.

Description

Technical field [0001] The invention belongs to the technical field of special paper, and particularly relates to a method for manufacturing salt packaging paper. Background technique [0002] Salt packaging paper is a kind of food packaging paper, specially used for salt packaging. In Europe and the United States, salt packaging paper has been widely used in the packaging of 1kg salt, but most of the domestic salt packaging uses plastic packaging, and a small part uses coated food paper packaging. There is no real salt packaging method that uses food paper packaging at present. There is no company that can mass produce this product. The salt packaging paper has a large weight, high opacity, high tensile strength, good burst resistance and tearing, low air permeability, good moisture resistance and no fluorescent substances, and the technical difficulties of copying are great. After analyzing and testing foreign salt packaging paper patterns, and at the same time conducting in-...

Claims

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Application Information

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IPC IPC(8): D21H15/10D21H11/04D21H17/37D21H17/29D21H17/17D21H19/14D21H19/20D21H19/84D21H23/64D21F11/00
CPCD21F11/00D21H11/04D21H15/10D21H17/17D21H17/29D21H17/37D21H19/14D21H19/20D21H19/84D21H23/64
Inventor 陈启杰李树林周丽玲郑学铭康美存王萍
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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