Preparation method of natural-color Chinese pennisetum fiber water-absorption lining paper

Abstract

The invention discloses a preparation method of natural-color Chinese pennisetum fiber high-water-absorption lining paper, and particularly relates to natural-color Chinese pennisetum fiber water-absorption lining paper which is high in added value and small in environment pollution and meets quality requirements. The lining paper is prepared from Chinese pennisetum and through the preparation method including the steps of pre-squeezing, air-drying, screening and dust removal, pre-dipping, alkali method cooking, washing, screening, hot alkali modification, washing, pulping and papermaking. Themethod can also be used for making natural-color paper for daily use and preparing natural-color packaging paper, painting and calligraphy paper and the like.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for preparing natural-color honeysuckle fiber water-absorbing backing paper. Background technique [0002] Absorbent backing paper is a type of hygienic product that wraps the absorbent core of disposable sanitary care products such as fluff pulp and polymer water-absorbent resin. The absorbent backing paper for sanitary products belongs to the special paper in household paper. It plays an irreplaceable role in disposable sanitary products. Its product features are: certain physical strength, soft and comfortable, good uniformity, good water absorption, good air permeability, high bulk, natural and easy to degrade, and good antibacterial Hygienic indicators such as antibacterial and antiallergic properties meet the requirements. At present, it is mainly used in women's sanitary napkins, baby diapers, pull-up pants, adult incontinence products, pet sanitary pads, me...

AI Technical Summary

Problems solved by technology

The chemical composition and fiber morphology analysis results of honeysuckle raw materials: cellulose content 40%-50% (softwood 40%-55%), fiber length 1.1-3.2mm (softwood 3-5mm), aspect ratio 80 -120 (coniferous wood 70-150), the fiber form and content of honeysuckle are similar to the coniferous wood which is the most suitable raw material for the production of water-absorbing backing paper. There are many knots and the nodes are more developed. There are often hard thorns around the nodes. The epidermal structure is tight and firm, and it contains more non-cellulose such as pentose sugar hemicellulose, fat wax, ash and miscellaneous cells. Impurity components, in addition also contain some soft, thick and short parenchyma cells composed of golden and silver grass pith, which is not reported in the prior art

[0007] At present, almost all absorbent backing papers on the market are produced from bleached pulp. Most of the bleaching uses high-efficiency chlorine dioxide and other chlorine-containing bleaching agents. Some merchants artificially add fluorescent whitening agents to meet high whiteness and good visual effects. Additives lead to an increase in the amount of chemicals and equipment investment in the bleaching stage, a decrease in pulping yield, an increase in labor intensity, and an increase in production costs. Moreover, bleaching wastewater (containing a large amount of COD and BOD, as well as a large amount of chloroform and chlorinated phenols) Compounds, chlorinated dioxins, furans and other toxic chlorinated organic substances) are difficult to meet the standards, which brings serious problems such as destructiveness to the ecological environment and harm to organisms

In addition, because the fibers of bleached pulp have gone through the bleaching process, the fibers have to be depolymerized and degraded, resulting in a large content of fine fibers in the absorbent backing paper, which has a negative impact on its physical strength, water absorption, bulk, softness, and air permeability. , thus affecting the pass rate of the product

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