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Semi-transparent paper preparation method

A technology of translucent paper and waste paper, which is applied in the field of papermaking, can solve the problems of high cost and achieve the effect of improving performance, reducing cost and improving product quality

Inactive Publication Date: 2018-12-11
福建省晋江优兰发纸业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing translucent papers all use a large amount of long-fiber wood pulp (softwood pulp) and a small amount of short-fiber wood pulp (hardwood pulp) as raw material pulp, but this large-scale use of softwood pulp will make the cost higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method for translucent paper, comprising the following steps:

[0028] 1. Waste paper pulping: put waste toilet paper and aviation waste paper into a high-consistency hydraulic pulper, add water until the mass fraction of waste paper is 15%; add lipase, and the dosage is 0.03% of the dry pulp weight; Before adding lipase, use caustic soda and hydrochloric acid to adjust the pH of the slurry to 7, and the solution temperature is 55°C; soak for 20 minutes, then disintegrate at a speed of 2200r / min to obtain waste paper pulp, control the beating degree at 35°SR, and store it in the coarse stock tank ; The lipase is from Shenzhen Lvweikang Biological Engineering Co., Ltd.;

[0029] 2. Sand and slag removal: the waste paper pulp described in step 1 passes through three sets of high-frequency hopping screens to remove impurities after the coarse stock tank, and the waste paper pulp can effectively remove sand and impurities through the hopping screens;

[0030]...

Embodiment 2

[0034] A preparation method for translucent paper, comprising the following steps:

[0035] 1. Waste paper pulping: put stainless steel lining paper and egg tray paper into a high-consistency hydraulic pulper, add water until the mass fraction of waste paper is 17%; add phospholipase, the dosage is 0.1% of the dry pulp, before adding Use caustic soda or hydrochloric acid to adjust the pH of the slurry to 5.5, and the temperature of the slurry is 60°C; add a surfactant in an amount of 0.1% of the dry pulp weight, soak for 40 minutes, and then disintegrate at a speed of 2200r / min to obtain waste paper pulp; degree of beating Control at 40 ° SR, enter the coarse stock tank for storage; the phospholipase comes from Hubei Jianuoxin Biochemical Co., Ltd.;

[0036] 2. Desanding and slag removal: the waste paper pulp described in step 1 passes through three sets of high-frequency hopping screens to remove impurities after the coarse stock tank;

[0037] 3. Pulping of wood pulp board ...

Embodiment 3

[0041] A preparation method for translucent paper, comprising the following steps:

[0042] 1. Waste paper pulping: put waste toilet paper and aviation waste paper into a high-concentration hydraulic pulper, add water until the mass fraction of waste paper is 18%; add esterase, and use caustic soda or hydrochloric acid to adjust the pH of the slurry to 9 before adding , the slurry temperature is 60°C, add a surfactant, the dosage is 0.5% of the dry pulp weight; soak for 60min, then disintegrate at a speed of 2200r / min to obtain waste paper pulp, control the beating degree at 45°SR, and enter the coarse stock tank Storage; The esterase is from Fujian Fuda Baite Technology Development Co., Ltd.;

[0043] 2. Desanding and slag removal: the waste paper pulp described in step 1 passes through three sets of high-frequency hopping screens to remove impurities after the coarse stock tank;

[0044] 3. Pulping of wood pulp board and deinked pulp: add long-fiber wood pulp board and dein...

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PUM

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Abstract

The invention relates to the technical field of papermaking, and provides a semi-transparent paper preparation method, solving the technical problem of how to use waste paper to replace a part of pulpto prepare semi-transparent paper. The semi-transparent paper preparation method includes the steps of (1), preparing pulp from waste paper; (2), removing sand and dregs; (3), preparing pulp from wood-pulp boards and deinked pulp; (4), blending the pulp and conditioning; (5), manufacturing paper with the pulp and calendering and shaping.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for preparing translucent paper. Background technique [0002] Translucent paper is a kind of oil-proof wrapping paper, also known as wax paper, and it is also a kind of thin wrapping paper. It is mostly flat paper, colorless or dyed into various colors. Translucent, with good oil resistance and air-tightness, mainly used as protective packaging materials for various foods, medicines, precision instrument parts, and silk fabrics, with bleached chemical wood pulp as raw material, after high-viscosity beating, Heavy-sized, sheet-type paper machine and super-calendered. Existing translucent paper all adopts a large amount of long-fiber wood pulp (softwood pulp) and a small amount of short-fiber wood pulp (hardwood pulp) as raw material pulp, but this large-scale use of softwood pulp will make the cost higher. Facing the problems of resource shortage, environmental pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/32D21B1/34D21C5/00D21D1/30D21F11/00D21H27/00
CPCD21B1/32D21B1/345D21C5/005D21D1/303D21F11/00D21H27/00Y02W30/64
Inventor 曹旭张若营苏凤全
Owner 福建省晋江优兰发纸业有限公司
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