Method for preparing natural color bamboo fiber high-water absorption lining paper for production of hygienic products

A technology for sanitary products and bamboo fiber, which is applied to pulping of cellulose raw materials, special paper, pulping with inorganic alkali, etc., can solve the problem of increased chemical dosage and equipment investment in bleaching section, increased production cost, and decreased pulping yield. and other problems, to achieve the effect of alleviating the pressure of raw material costs, reducing production costs, and strengthening the market driving force.

Active Publication Date: 2017-06-13
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0014] The purpose of the present invention is to solve the shortage of raw materials for the production of existing water-absorbent backing paper. Since the bleaching mostly uses high-efficiency chlorine-containing bleaching agents, the amount of chemicals and equipment investment in the bleaching stage will increase, the pulping yield will decrease, and the utilization rate of raw materials will be low. , increased labor intensity, increased production costs, etc., and the bleaching wastewater contains a large amount of COD, BOD, chlorinated organic matter and other serious pollution, and the bleached absorbent backing paper contains more fine fibers, which affect its physical strength, water absorption, and bulk. , softness, air permeability and other indicators cause adverse effects and other problems, and provide a preparation method for natural color bamboo fiber super absorbent backing paper used in the production of sanitary products

Method used

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  • Method for preparing natural color bamboo fiber high-water absorption lining paper for production of hygienic products
  • Method for preparing natural color bamboo fiber high-water absorption lining paper for production of hygienic products
  • Method for preparing natural color bamboo fiber high-water absorption lining paper for production of hygienic products

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] (1) Cut the bamboo directly into 10-50mm long and 5-20mm wide, wash off the surface impurities and remove excess water through a washing machine, and then send it to a pre-steamer for pre-steaming at normal pressure for 10 minutes.

[0057] (2) Impregnation section: the pre-steamed bamboo chips are sent to the impregnator.

[0058] The equipment used in the impregnation section is a standpipe compression impregnator, which is mainly composed of a feeding port, a screw feeder, an impregnation lifting screw, and a preheater. The screw feeder compression ratio is 4:1.

[0059] The residence time of the tablet in the impregnation section is 15 minutes, the temperature is 75°C, and the chemical liquid is added to the impregnation screw, and the amount of sodium hydroxide is 5% relative to the mass of the absolute dry raw material.

[0060] (3) Oxygen-alkali cooking: the impregnated bamboo chips are sent to the digester.

[0061] Oxy-alkali cooking is carried out in two sta...

comparative test 1

[0074] Comparative Test 1: Comparing Example 1 with Comparative Example 1, it can be concluded that the former has an impregnation section, the latter cancels the impregnation section, and the rest of the process and flow are identical. Tensile index, longitudinal wet tensile strength, transverse wet tensile strength and transverse water absorption have more than doubled, and the purity of the backing paper has increased, manifested in an increase of 7 percentage points in whiteness, a decrease of 3 percentage points in pentose, and ash content down by nearly 1 percentage point. The reasons for the analysis are as follows:

[0075] The impregnation section is canceled, that is, the entire process of compression-expansion-absorption of lye-heating of the impregnation section is cancelled. The role of the impregnation section no longer exists. (For example, the impregnation section can effectively avoid problems such as uneven thickness of the bamboo slices and uneven discharg...

Embodiment 2

[0077] (1) Cut the bamboo directly into 10-50mm long and 5-20mm wide, wash off the surface impurities and remove excess water through a washing machine, and then send it to a pre-steamer for pre-steaming at normal pressure for 15 minutes.

[0078] (2) Impregnation section: the pre-steamed bamboo chips are sent to the impregnator.

[0079] The equipment used in the impregnation section is a standpipe compression impregnator, which is mainly composed of a feeding port, a screw feeder, an impregnation lifting screw, and a preheater. The screw feeder compression ratio is 5:1.

[0080] The residence time of the tablet in the impregnation section is 30min, the temperature is 60°C, and the chemical liquid is added to the impregnation lifting screw, and the amount of sodium hydroxide is 3% relative to the mass of the absolute dry raw material.

[0081] (3) Oxygen-alkali cooking: the impregnated bamboo chips are sent to the digester.

[0082] Oxy-alkali cooking is carried out in two ...

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Abstract

The invention discloses a method for preparing natural color bamboo fiber high-water absorption lining paper for production of hygienic products. According to the method, bamboo is adopted as a raw material, and with the combination of physical and chemical methods, a product which is excellent in comprehensive quality and small in environment pollution is prepared. The physical property indexes of the natural color bamboo fiber high-water absorption lining paper are that the longitudinal tensile index is 12-15N-m / g, the transverse tensile index is 3-5N-m / g, the longitudinal wet tensile strength is 30-50N / m, the transverse wet tensile strength is 10-20N / m, the transverse water-absorbing quality is 45-65mm / 100s, the fixed quantity is 10-40g / m<2>, the whiteness is 35-50% ISO, the pentosan is 8% or less, the ash content is 1.0% or less, the bulkiness is 5.5-6.5cm<3> / g, the softness is 250mN or less, the bacteriostasis rate of staphylococcus aureus and escherichia coli is 99% or above, and the bacteriostasis rate of candida albicans is 98% or above.

Description

technical field [0001] The invention relates to the technical field of super-absorbent backing paper for sanitary products, in particular to a preparation method for natural-color bamboo fiber super-absorbent backing paper used in the production of sanitary products. Background technique [0002] Absorbent backing paper is one of the structural components of sanitary products such as feminine hygiene products, baby diapers, adult incontinence products, breast overflow pads, and disposable nursing pads. It is used to cover absorbent materials such as fluff pulp, absorbent resin, and absorbent paper. Its products are characterized by certain physical strength, softness and comfort, good evenness, good water absorption, good air permeability, high bulk, and good antibacterial, antibacterial, and antiallergic properties, which meet the requirements. [0003] At present, the raw material for the production of absorbent paper is mainly bleached wood pulp, and people in the industr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21C5/00D21H11/12D21C3/02D21C3/26D21H27/00D21H21/36D21H21/20D21H21/08
CPCD21C3/026D21C3/263D21C5/00D21H11/12D21H21/08D21H21/20D21H21/36D21H27/005D21H27/007
Inventor 杨玲彭成庞春霞李文俊王云凤肖林张豪王尧刘泽覃于成龙刘德义赵海芝田丽婷张克钟
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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