Impregnated white kraft paper and preparation technology thereof

A preparation process and technology of kraft paper, applied in the field of papermaking, can solve the problems of dust affecting quality, incomplete penetration, low air permeability, etc., and achieve the effects of uniform dyeing, paper cost reduction, and good tensile strength

Active Publication Date: 2014-09-10
WEIFANG HENGLIAN SPECIALTY PAPER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the common problems in kraft paper manufacturing industry are: when impregnating ink, in order to ensure sufficient and uniform dyeing, the inside cannot be white, so the processing speed is slow, the duration in the ink pool is long, and the wet strength of existing kraft paper is low. , paper breakage often occurs; the softness and bulk of the paper are poor, and the feeling of the leather after embossing or PU coating is poor; there is a lot of dust, which affects the quality when impregnated with light colors; the paper has a low cobb value and softness Poor, low air permeability; the dyeing of the paper is not uniform enough, the penetration is not complete; the dry and wet strength of the paper is poor, the paper is broken when dyeing, and the breaking resistance and folding resistance are poor

Method used

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  • Impregnated white kraft paper and preparation technology thereof
  • Impregnated white kraft paper and preparation technology thereof
  • Impregnated white kraft paper and preparation technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) Preparation of fillers for later use:

[0031] Add 6625kg of water to the filler dissolving tank, start stirring, first slowly put 1325kg of light calcium powder into the dissolving tank, then slowly put 1325kg of heavy calcium powder into the dissolving tank, ensure that the stirring time is more than 30 minutes, make it fully stirred evenly, and finally prepare the concentration Reserve for 310g / L filler.

[0032] (2) A preparation process of impregnated white kraft paper comprises the following steps:

[0033] 1. Pulping:

[0034] (1) Preparation of long-fiber pulp: the bleached kraft softwood long-fiber wood pulp with a fiber length of 2.5 mm is pulverized by a hydropulper and transferred to the tap pool, and then transferred to the long-fiber pulp through a double-disc mill beater. Tap the back pond, and control the beating power to 150kwh, the beating concentration to 4.0%, and the beating degree to 24°SR to obtain long-fiber pulp;

[0035] (2) Preparation ...

Embodiment 2

[0045] (1) Preparation of fillers for later use:

[0046] Add 6000kg of water to the filler dissolving tank, start stirring, first slowly put 1325kg of light calcium powder into the dissolving tank, then slowly put 1325kg of heavy calcium powder into the dissolving tank, ensure that the stirring time is more than 30 minutes, make it fully stirred evenly, and finally prepare the concentration Reserve for 340g / L filler.

[0047] (2) A preparation process of impregnated white kraft paper comprises the following steps:

[0048] 1. Pulping:

[0049] (1) Preparation of long-fiber pulp: the bleached kraft softwood long-fiber wood pulp with a fiber length of 2.7mm is pulverized by a hydropulper and transferred to the tap pool, and then transferred to the long-fiber pulp through a double-disc mill beater. Tap the back pond, and control the beating power to 170kwh, beating concentration is 4.3%, beating degree is 24°SR, and long-fiber pulp is obtained;

[0050] (2) Preparation of sho...

Embodiment 3

[0061] (1) Preparation of fillers for later use:

[0062] Add 6185kg of water to the filler dissolving tank, start stirring, first slowly put 1325kg of light calcium powder into the dissolving tank, then slowly put 1325kg of heavy calcium powder into the dissolving tank, ensure that the stirring time is more than 30 minutes, make it fully stirred evenly, and finally prepare the concentration Reserve for 330g / L filler.

[0063] (2) A preparation process of impregnated white kraft paper comprises the following steps:

[0064] 1. Pulping:

[0065] (1) Preparation of long-fiber pulp: the bleached kraft softwood long-fiber wood pulp with a fiber length of 2.6 mm is pulverized by a hydropulper and transferred to the tap pool, and then transferred to the long-fiber pulp through a double-disc mill beater. Tap the back pond, and control the beating power to 155kwh, the beating concentration is 4.1%, the beating degree is 25°SR, and the long fiber pulp is obtained;

[0066] (2) Prepa...

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Abstract

The invention provides impregnated white kraft paper with the fixed quantity of 105-195 g / m<2>, the banner quantitative difference of less than or equal to 5g / m<2>, the tightness of 0.6-0.7 g / cm<3>, the smoothness of 6 / 8S, the transverse tearability of more than or equal to 1600mN, the longitudinal dry tensile strength of more than or equal to 90N / 15mm, the transverse dry tensile strength of more than or equal to 50N / 15mm, the longitudinal wet tensile strength of more than or equal to 20N / 15mm, the transverse wet tensile strength of more than or equal to 15N / 15mm and the water absorption value of more than or equal to 160g / m<2>. A preparation technology of the impregnated white kraft paper comprises the steps of pulping, mixing, carrying out papermaking, rewinding and packaging, wherein a wet strength agent and filler are fed in the papermaking step, so that the quality of the white kraft paper is further improved. The preparation technology of the impregnated white kraft paper is improved, so that the defect of incomplete impregnation is overcome, and the technology has the advantage of evenness in dyeing.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to an impregnated white kraft paper and a preparation process thereof. Background technique [0002] Impregnated white kraft paper is also called water-absorbing white kraft paper and leather-filled base paper. After post-processing, it is a kind of high-grade paper for decorative materials. The color is saturated and bright, not easy to fade, the paper is soft, tough, tear-resistant, pull-resistant, scratch-resistant, easy to glue, easy to fit, and has the characteristics of genuine leather. Noble and texture, the price is lower than genuine leather and PU. The paper is completely dyed through, which can prevent the edge from being exposed on the zygote, and the box made has a strong sense of integrity, and the lines are regular and beautiful. [0003] Domestically processed impregnated white kraft paper has only been used to replace imported finished paper for about 2 years,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21H27/10D21H17/67D21H21/20D21F11/00
Inventor 杨振永陈世民凡菜华任怀燕庄子祯潘玉香牛玉镇邵琳淇
Owner WEIFANG HENGLIAN SPECIALTY PAPER
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