阅读说明：本技术 一种高抑菌本色竹纤维超柔卫生纸原纸及制备方法 (High-antibacterial natural-color bamboo fiber super-soft toilet paper base paper and preparation method thereof ) 是由 沈根莲 李丛峰 李云川 沈长明 范爱平 于 2019-08-23 设计创作，主要内容包括：本发明公开一种高抑菌本色竹纤维超柔卫生纸原纸及制备方法,所述制备方法包括以下步骤：S1将竹片经水洗去除杂质脱水备用；S2采用碱法进行蒸煮；S3筛出蒸煮后的浆料中的竹节、粗大纤维束,用热水逆流洗涤的方法；S4将得到的本色竹浆纤维经进行压滤机浓缩、高浓磨浆、低浓磨浆处理得到纸浆；S5在纸浆中添加壳聚糖衍生物抑菌剂,经稀释、除砂、成型、脱水、干燥、起皱、卷取形成原纸；S6原纸涂布加工。本发明本采用无硫蒸煮、不漂白、最大程度保留竹原料本质的本色竹纤维,具有天然的抑菌效果。(The invention discloses high-antibacterial natural-color bamboo fiber super-soft toilet paper base paper and a preparation method thereof, wherein the preparation method comprises the following steps: s1, washing the bamboo chips with water to remove impurities and dewater the bamboo chips for later use; s2, cooking by an alkaline method; s3, bamboo joints and thick fiber bundles in the cooked slurry are screened out and washed by hot water in a countercurrent mode; s4, concentrating the obtained natural color bamboo pulp fiber by a filter press, grinding the natural color bamboo pulp fiber into thick liquid at high concentration, and grinding the natural color bamboo pulp fiber into thick liquid at low concentration to obtain paper pulp; s5 adding chitosan derivative bacteriostatic agent into the paper pulp, diluting, desanding, forming, dehydrating, drying, wrinkling and rolling to form base paper; and (S6) coating raw paper. The natural-color bamboo fiber is steamed and boiled without sulfur, is not bleached, retains the essence of the bamboo raw material to the maximum extent, and has a natural antibacterial effect.)

1. a preparation method of high-antibacterial natural-color bamboo fiber super-soft toilet paper is characterized by comprising the following steps:

S1, washing the bamboo chips with water to remove impurities, and dehydrating for later use;

S2, adopting an alkaline method to cook, adding cooking liquor into the bamboo chips, circularly heating the cooking liquor to 140-170 ℃, increasing the pressure to 0.4-0.7Mpa, preserving the heat for 20-60 minutes, wherein the whole cooking process time is 240-400 minutes, and the cooking liquor is sodium hydroxide solution;

S3, bamboo joints and thick fiber bundles in the cooked pulp are screened out, and the pulp is cleaned by a hot water countercurrent washing method to obtain the natural color bamboo pulp fiber;

S4, concentrating the obtained natural color bamboo pulp fiber by a filter press, grinding the natural color bamboo pulp fiber into thick liquid at high concentration, and grinding the natural color bamboo pulp fiber into thick liquid at low concentration to obtain paper pulp;

S5 adding 0.2 ~ 1.5.5% chitosan derivative bacteriostatic agent into the paper pulp, diluting, desanding, forming, dehydrating, drying, wrinkling, and rolling to form base paper;

S6 base paper coating process

s6.1, coating 10 ~ 40% of softener on the base paper, and slitting and packaging;

or S6.2, coating 10 ~ 40% of bacteriostatic agent and softener on the base paper, and slitting and packaging.

2. the method for preparing the highly bacteriostatic natural-color bamboo fiber ultra-soft toilet paper as claimed in claim 1, wherein in the S1 preparation, the bamboo chips are piled up for 20-100 days before being washed with water.

3. the preparation method of the highly antibacterial natural-color bamboo fiber super-soft toilet paper according to claim 1, wherein the amount of sodium hydroxide in S2 is 15-30% of the amount of the absolutely dry raw material, and the liquid ratio is 1: 3-6.

4. the method for preparing highly bacteriostatic natural color bamboo fiber ultra-soft toilet paper according to claim 1, wherein the chitosan derivative bacteriostatic agent is extracted from shellfish.

5. The method for preparing highly bacteriostatic natural-color bamboo fiber ultra-soft toilet paper according to claim 1, wherein in the drying process of S5, the wet paper is closely attached to the surface of a drying cylinder with a surface temperature of 100 ℃ or higher, and is dried by hot air convection heating at about 100 ℃.

6. The preparation method of the highly bacteriostatic natural-color bamboo fiber super-soft toilet paper according to claim 1, wherein the bamboo chips are derived from Sasa albo-marginata or Siji bamboos.

7. the high-antibacterial natural-color bamboo fiber super-soft toilet paper is characterized by being prepared by the preparation method of the high-antibacterial natural-color bamboo fiber super-soft toilet paper according to any one of claims 1 to 6.

Technical Field

The invention belongs to the technical field of papermaking, and particularly relates to high-antibacterial natural-color bamboo fiber super-soft toilet paper base paper and a preparation method thereof.

Background

The main stream of household paper in the market of China is paper bleached by a bleaching agent, and in order to improve the whiteness of toilet paper and improve the attractiveness of the paper, paper mills generally add some special additives into paper pulp for making paper. Some manufacturers use a large amount of fluorescent whitening agents in an adventure manner in order to pursue high whiteness of paper so as to improve brightness and aesthetic feeling of the paper, so that not only can environmental pollution be caused, but also human cells can be mutated and toxicity is accumulated by fluorescent substances to become a potential carcinogenic factor, and the fluorescent agents can cause damage to human bodies after being absorbed by the human bodies.

A misstatement exists in the process that many consumers buy the household paper, the white toilet paper is considered to be high in whiteness, clean and sanitary, and the fact that carcinogens such as dioxin, adsorbable organic halide and the like are generated in the bleaching process of the paper pulp is not known. Dioxin is a persistent organochlorine compound, has more than 30 kinds, has the characteristics of carcinogenesis, teratogenesis and mutagenesis, has long half-life and long residual time of 10 years, is easy to accumulate in the environment for a long time, and is called as a toxicant with the strongest toxicity on the earth. Without doubt, life paper made with long-term use of bleached pulp poses a threat to its health and is a "stealth killer" of human health.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides high-antibacterial natural-color bamboo fiber super-soft toilet paper base paper and a preparation method thereof.

in order to achieve the purpose, the invention adopts the following technical scheme:

A preparation method of high-antibacterial natural-color bamboo fiber super-soft toilet paper comprises the following steps:

S1, washing the bamboo chips with water to remove impurities, and dehydrating for later use;

s2, adopting an alkaline method to cook, adding cooking liquor into the bamboo chips, circularly heating the cooking liquor to 140-170 ℃, increasing the pressure to 0.4-0.7Mpa, preserving the heat for 20-60 minutes, wherein the whole cooking process time is 240-400 minutes, and the cooking liquor is sodium hydroxide solution;

S3, bamboo joints and thick fiber bundles in the cooked pulp are screened out, and the pulp is cleaned by a hot water countercurrent washing method to obtain the natural color bamboo pulp fiber;

S4, concentrating the obtained natural color bamboo pulp fiber by a filter press, grinding the natural color bamboo pulp fiber into thick liquid at high concentration, and grinding the natural color bamboo pulp fiber into thick liquid at low concentration to obtain paper pulp;

S5 adding 0.2 ~ 1.5.5% chitosan derivative bacteriostatic agent into the paper pulp, diluting, desanding, forming, dehydrating, drying, wrinkling, and rolling to form base paper;

s6 base paper coating process

S6.1, coating 10 ~ 40% of softener on the base paper, and performing links such as slitting, packaging, warehousing and the like and layer-by-layer inspection to obtain a qualified super-soft toilet paper product;

S6.2, coating 10 ~ 40% of bacteriostatic agent and softener on the base paper, and performing links such as slitting, packaging, warehousing and the like and layer-by-layer inspection to obtain a qualified super-soft toilet paper product.

Further, in the S1 preparation, the bamboo chips are piled up for 20-100 days before being washed by water.

Furthermore, the amount of sodium hydroxide in S2 is 15-30% of the amount of the oven-dried raw material, and the liquid ratio is 1: 3-6.

Further, the chitosan derivative bacteriostatic agent is extracted from shellfish.

Further, in the drying process of S5, the wet paper is closely attached to the surface of the drying cylinder with a surface temperature of 100 ℃ or higher, and is heated and dried by hot air convection at about 100 ℃, and sterilized at high temperature, so that the total number of bacterial colonies of the hygiene index of the base paper is far lower than the standard specified value, and the base paper does not contain escherichia coli, staphylococcus aureus, hemolytic streptococcus and the like.

further, the bamboo chips are derived from Sasa Arctii or Sasa veitchii.

the invention also provides the high-antibacterial natural-color bamboo fiber super-soft toilet paper which is prepared by the method.

Compared with the prior art, the invention has the beneficial effects that:

The raw paper of the high antibacterial natural color bamboo fiber super-soft toilet paper is prepared into natural color bamboo pulp through the steps of material preparation, cooking, screening, washing and the like, the pulp is made into raw paper through the working procedures of concentration by a filter press, high-concentration pulp grinding, low-concentration sand removal and the like, and the raw paper is further processed, cut and packaged into a finished product, wherein the raw paper of the high antibacterial natural color bamboo fiber super-soft toilet paper is formed into paper with a sheet structure, all the paper is constructed by bamboo pulp fibers, the whiteness is 28-40%, and the paper is soft and comfortable in hand feeling. The paper pulp adopts sulfur-free cooking, unbleached and natural color bamboo pulp fiber which furthest retains the essence of the bamboo raw material, the cooking adopts an alkaline method instead of a sulfate method which is commonly adopted in the industry, no mirabilite is added in an alkaline furnace, so that the cooking liquor does not contain sodium sulfide and does not use a sulfur-containing cooking auxiliary agent, the pollution of substances such as hydrogen sulfide, methyl mercaptan, methyl sulfide and the like which generate stink in the cooking process to the surrounding atmosphere is avoided, the paper pulp is green and environment-friendly, the characteristics and bamboo fragrance of the bamboo fiber (such as contained natural antibacterial bamboo quinone) are furthest retained without oxygen removal, and the paper product made by the paper pulp is real bamboo natural color without addition, so that various physical indexes of the paper are better; the pollution caused by the residue and the discharge of bleaching chemicals is avoided, and the environment of the surrounding water area and the health of consumers are better protected.

The high-antibacterial natural color bamboo fiber super-soft toilet paper base paper is prepared by adopting a sulfur-free cooking process, does not have an oxygen removal link which is common in the industry, is free from chlorine-containing bleaching treatment, is green and environment-friendly in the production process, retains the properties of bamboo raw materials to the maximum extent, has light bamboo fragrance, and has natural antibacterial effect due to bamboo quinone contained in pulp.

The fast-growing bamboo is adopted, the fast-growing bamboo has the characteristics of one-time planting, high growth speed and the like, the bamboo can be cut down 1-2 years after being planted, and can be continuously subjected to regeneration and felling, the ecological environment protection is facilitated, meanwhile, the characteristics of a large number of local hills are utilized, a mode of forest paper-integration engineering is adopted, and effective cooperation is carried out with local rural areas, so that the living environment of people is beautified, the local economic development is driven, the economic income of local farmers is increased, and the economic development and the win-win of farmers and enterprises are realized. If straw pulp is used for producing unbleached pulp, the strength is too low due to short fiber and high content of foreign cells, the use requirement is difficult to meet, the alkali recovery rate is low, and the influence on the environment is large, if wood pulp is used for producing unbleached household paper, a large amount of forest wood is felled.

The high antibacterial natural color bamboo fiber super-soft toilet paper meets or is superior to GB 15979 hygienic index Standard for Disposable sanitary articles, and has all indexes except whiteness that the basis weight of raw paper is 14.5 +/-0.5 g/m ², the dry tensile index is 5 ~ 10 N.m/g, the wet tensile index is 40 ~ 60 N.m/g, the 2 ~ 5mm hole is less than or equal to 10/m ², the >5mm ~ 8mm hole is less than or equal to 1/m ², and the >8mm hole is not acceptable.

Detailed Description

The present invention will be further described with reference to the following examples, which are intended to illustrate only some, but not all, of the embodiments of the present invention. All other embodiments that can be obtained by a person skilled in the art based on the embodiments of the present invention without any creative effort belong to the protection scope of the present invention.