阅读说明：本技术 一种本色高湿强面巾纸及其生产工艺 (Natural color high wet strength face tissue and production process thereof ) 是由 伍鹤时 吴文勇 史宣树 于 2019-10-18 设计创作，主要内容包括：本发明涉及一种本色高湿强面巾纸,包括如下质量百分含量的组分：本色液体竹浆55.0-60.0％；漂白相思木浆13.5-15.0％；本色桉木浆7.5-8.5％；本色阔叶浆5.5-6.5％；漂白桉木浆13.5-15.0％,此外,本发明还提出了该面巾纸的制备方法。本发明的本色高湿强面巾纸具有纹路细腻,手感柔滑,有较高的湿强度,遇水不易破裂,可满足干、湿两用的目的,使用效果优异,完全满足人们生活中的需要。(The invention relates to natural-color high-humidity high-strength facial tissue which comprises the following components in percentage by mass: 55.0-60.0% of natural color liquid bamboo pulp; bleached acacia wood pulp 13.5-15.0%; 7.5 to 8.5 percent of natural-color eucalyptus pulp; 5.5 to 6.5 percent of natural broad leaf pulp; bleached eucalyptus pulp accounts for 13.5-15.0%, and the invention further provides a preparation method of the facial tissue. The natural-color high-wet-strength facial tissue has fine lines, smooth hand feeling, high wet strength, difficult breakage when meeting water, can fulfill the aim of dry and wet, has excellent use effect, and completely meets the requirements of people in life.)

1. The natural-color high-humidity high-strength facial tissue is characterized by comprising the following components in percentage by mass:

55.0-60.0% of natural color liquid bamboo pulp;

bleached acacia wood pulp 13.5-15.0%;

7.5 to 8.5 percent of natural-color eucalyptus pulp;

5.5 to 6.5 percent of natural broad leaf pulp;

bleached eucalyptus pulp 13.5-15.0%.

2. The unbleached high wet strength facial tissue according to claim 1, further comprising a wet strength agent and a wet strength retention agent, wherein the wet strength agent is a polyamide polyamine-epichlorohydrin resin or a polyamide polyamine-epichlorohydrin resin in an amount of 35 to 40 kg/ton of paper, and the wet strength retention agent is an anionic organic polymer in an amount of 0.6 to 0.7 kg/ton of paper.

3. The natural color high wet strength facial tissue as claimed in claim 1, wherein the sheet whiteness of the natural color liquid bamboo pulp is 37.0-39.5%.

4. The natural color high wet strength facial tissue according to claim 1, characterized in that the natural color liquid bamboo pulp has a fiber length of 1.6mm to 1.8mm, a fiber width of 14.0 μm to 14.8 μm, and a thickness of 0.77mg/m to 0.09 mg/m; the length of the bleached acacia wood pulp is 730-0.900 mm, and the thickness is kept at 0.050-0.058 mg/m; the length of the natural eucalyptus pulp fiber is kept between 0.820mm and 0.900mm, and the thickness of the fiber is kept between 0.060mg/m and 0.076 mg/m; the length of the natural broad leaf pulp is kept between 0.9mm and 1.0mm, and the thickness is kept between 0.070mg/m and 0.085 mg/m; the length of the bleached eucalyptus pulp is between 0.8 and 1.0mm, and the thickness is kept between 0.052 and 0.062 mg/m.

5. The unbleached high wet strength facial tissue according to claim 1, characterized in that the pulp of the unbleached liquid bamboo pulp has a wet weight maintained at 11-13g, a beating degree maintained at 16-18 ° SR, and a concentration of 23-25%.

6. The process for producing unbleached high wet strength facial tissue according to any one of claims 1 to 5, characterized by the steps of:

s1, selecting natural color liquid bamboo pulp, bleaching acacia wood pulp, natural color eucalyptus wood pulp, natural color broad leaf pulp and bleached eucalyptus wood pulp as production raw materials;

s2, pumping natural color liquid bamboo pulp to a discharge tower, squeezing the bamboo pulp by a double-roller squeezing machine, controlling the concentration to be 23-25%, then conveying the bamboo pulp to a high-concentration pulp grinder, wherein the pulp is subjected to fibrillation in a grinding area by mutual rubbing, squeezing and friction among fibers, the pulp is not obviously cut, the bamboo pulp is ground to a high-concentration pulp until the beating degree is 16-18 degrees SR, and the wet weight of the pulp is 11-13 g; then, the pulp is continuously pumped to a long fiber discharging tower for storage, then is ground into pulp by a low-concentration pulp grinder, fibers of the pulp are devillicate and broomed and cut off, the pulp is obviously cut off, the natural color liquid bamboo pulp with the concentration of 4.3-4.5% is obtained after low-concentration pulp grinding, and then the natural color liquid bamboo pulp is conveyed to a long fiber beating tower for storage for later use;

s3, sequentially putting bleached acacia wood pulp, natural-color eucalyptus wood pulp, natural-color broad leaf pulp and bleached eucalyptus wood pulp into a pulper for pulping, pumping mixed pulp into a short fiber discharging tower for storage and grinding, and continuously pulping the mixed pulp by a pulping machine, then feeding the pulp into a short fiber beating tower for storage and standby;

s4, mixing the prepared natural color liquid bamboo pulp and the mixed pulp in a pulp mixing tank according to a proportion, and sending the pulp into a pulp forming tank for later use after the pulp mixing is finished;

s5, making the pulp in the pulp making tank into wet paper web on a fourdrinier machine;

and S6, drying the wet paper web to obtain the natural-color high-wet-strength facial tissue.

7. The process for producing unbleached high wet strength facial tissue according to claim 6, wherein in the step S2, the refiner power of the high consistency refiner is set at 420-450 kw; the refining power of the low consistency refiner was set at 45 kw.h/t.

8. The process for producing unbleached high wet strength facial tissue according to claim 6, characterized in that in step S3, the pulper has a pulping time set at 750S, a pulping consistency set at 6.5% and a discharge consistency set at 5.2%.

9. The process for producing unbleached high wet strength facial tissue according to claim 6, wherein in step S3, the refining consistency of the staple fiber discharge tower is set to 4.2-4.5% and the refining power is set to 30 kw.h/t.

10. The process for producing unbleached high wet strength facial tissue according to claim 6, wherein in step S4, a wet strength agent and a wet strength retention agent are added into the pulping tank after pulp preparation and are uniformly stirred, the dosage of the wet strength agent per ton of paper is kept between 35kg and 40kg, and the dosage of the wet strength retention agent per ton of paper is kept between 0.6 kg and 0.7 kg.

Technical Field

The invention relates to the technical field of papermaking, in particular to natural-color high-wet-strength facial tissue and a production process thereof.

Background

Paper towels have become an essential daily article in life. Along with the continuous improvement of living standard of people, people also put forward higher requirements on the household paper, the household paper is required to be safe and sanitary, and meanwhile, the household paper also has certain wet strength, maintains the capability of being not easy to break when meeting water, and can realize the functions of dry and wet; however, few of the conventional facial tissues have a dry/wet dual-purpose function.

Disclosure of Invention

The natural-color high-wet-strength facial tissue has fine lines, smooth hand feeling, higher wet strength, is not easy to break when meeting water, can fulfill the aim of dry and wet dual-purpose, and has excellent use effect.

The purpose of the invention is realized by the following technical scheme:

the natural-color high-wet-strength facial tissue comprises the following components in percentage by mass:

55.0-60.0% of natural color liquid bamboo pulp;

bleached acacia wood pulp 13.5-15.0%;

7.5 to 8.5 percent of natural-color eucalyptus pulp;

5.5 to 6.5 percent of natural broad leaf pulp;

bleached eucalyptus pulp 13.5-15.0%.

Furthermore, the natural color high wet strength facial tissue also comprises a wet strength agent and a wet strength retention agent, wherein the wet strength agent comprises polyamide polyamine-epichlorohydrin resin or amide polyamine-epichlorohydrin resin, the dosage of the polyamide polyamine-epichlorohydrin resin or amide polyamine-epichlorohydrin resin per ton of the natural color high wet strength facial tissue is 35-40 kg/ton, and the wet strength retention agent is anionic organic polymer, and the dosage of the polyamide polyamine-epichlorohydrin resin or amide polyamine-epichlorohydrin resin per ton of the natural color high wet strength facial tissue is 0.6-0.7 kg/ton. The anionic organic polymer may be selected from SuperFix2190, a wet strength retention agent from Kailede.

Further, the sheet whiteness of the natural color liquid bamboo pulp is 37.0-39.5%, and the natural color liquid bamboo pulp can be one or a combination of two, but the natural color liquid bamboo pulp is required to be in proper fiber length, fiber width and thickness.

Furthermore, the fiber length of the natural color liquid bamboo pulp is 1.6 mm-1.8 mm, the fiber width is kept at 14.0 mu m-14.8 mu m, and the thickness is 0.77 mg/m-0.09 mg/m; the length of the bleached acacia wood pulp is 730-0.900 mm, and the thickness is kept at 0.050-0.058 mg/m; the length of the natural eucalyptus pulp fiber is kept between 0.820mm and 0.900mm, and the thickness of the fiber is kept between 0.060mg/m and 0.076 mg/m; the length of the natural broad leaf pulp is kept between 0.9mm and 1.0mm, and the thickness is kept between 0.070mg/m and 0.085 mg/m; the length of the bleached eucalyptus pulp is between 0.8 and 1.0mm, and the thickness is kept between 0.052 and 0.062 mg/m.

The broadleaf wood is mainly required to have hand feeling, and the thickness can comprehensively show that the broadleaf wood has good hand feeling, so that the width is not required.

Further, the wet weight of the pulp of the natural color liquid bamboo pulp is kept between 11 and 13g, the beating degree is kept between 16 and 18 degrees SR, and the concentration is 23 to 25 percent.

The production process of the natural color high wet strength facial tissue comprises the following steps:

s1, selecting natural color liquid bamboo pulp, bleaching acacia wood pulp, natural color eucalyptus wood pulp, natural color broad leaf pulp and bleached eucalyptus wood pulp as production raw materials;

s2, pumping natural color liquid bamboo pulp to a discharge tower, squeezing the bamboo pulp by a double-roller squeezing machine, controlling the concentration to be 23-25%, then conveying the bamboo pulp to a high-concentration pulp grinder, wherein the pulp is subjected to fibrillation in a grinding area by mutual rubbing, squeezing and friction among fibers, the pulp is not obviously cut, the bamboo pulp is ground to a high-concentration pulp until the beating degree is 16-18 degrees SR, and the wet weight of the pulp is 11-13 g; then, the pulp is continuously pumped to a long fiber discharging tower for storage, then is ground into pulp by a low-concentration pulp grinder, fibers of the pulp are devillicate and broomed and cut off, the pulp is obviously cut off, the natural color liquid bamboo pulp with the concentration of 4.3-4.5% is obtained after low-concentration pulp grinding, and then the natural color liquid bamboo pulp is conveyed to a long fiber beating tower for storage for later use;

s3, sequentially putting bleached acacia wood pulp, natural-color eucalyptus wood pulp, natural-color broad leaf pulp and bleached eucalyptus wood pulp into a pulper for pulping, pumping mixed pulp into a short fiber discharging tower for storage and grinding, and continuously pulping the mixed pulp by a pulping machine, then feeding the pulp into a short fiber beating tower for storage and standby;

s4, mixing the prepared natural color liquid bamboo pulp and the mixed pulp in a pulp mixing tank according to a proportion, sending the pulp into a pulp forming tank after the pulp mixing is finished, adding a wet strength agent and a wet strength retention agent, and uniformly stirring for later use;

s5, making the pulp in the pulp making tank into wet paper web on a fourdrinier machine;

and S6, drying the wet paper web to obtain the natural-color high-wet-strength facial tissue.

Further, in the step S2, the refiner power of the high consistency refiner is set to 420-450 kw; the refining power of the low consistency refiner was set at 45 kw.h/t.

Further, in step S3, the pulping time of the pulper is set to 750S, the pulping concentration is set to 6.5%, and the discharge concentration is set to 5.2%; the pulping concentration of the short fiber discharging tower is set to be 4.2-4.5%, and the pulping power is set to be 30 kw.h/t.

Further, in the step S4, the wet strength agent is kept in the amount of 35-40kg per ton of paper, and the wet strength retention agent is kept in the amount of 0.6-0.7kg per ton of paper.

In the production process, the liquid pulp discharging tower, the short fiber discharging tower and the long fiber discharging tower are mainly used for storing pulp and ensuring pulp used in the subsequent stage; the double-roller pulp extruder is used for concentrating natural-color liquid bamboo pulp (the concentration is 23-25 percent), and a proper pulp grinding concentration is given to a high-concentration mill; (3) the high-concentration grinding is that the pulp is devillicate and broomed by the mutual rubbing, extrusion and friction between fibers in a grinding area, and the pulp is not obviously cut off; the low-concentration pulping machine is used for devillicating, brooming and cutting off pulp fibers and obviously cutting off pulp; the long fiber beating tower and the short fiber beating tower are used for storing the pulp ground by the pulp grinder to ensure the pulp used in the subsequent stage; the pulp preparation pool is used for matching pulp in the long fiber beating tower and the short fiber beating tower according to a set proportion; the 'pulping tank' stores the matched pulp and prepares for pulping.

The process of the application is different from the traditional process in that: the production process adopts a double-roller pulp extruder and a high-concentration pulp grinder to form a high-concentration pulping system and combines the high-concentration pulping system with the low-concentration pulp grinder to carry out pulping, thereby forming a novel high-concentration and low-concentration pulping system. And multiple sizing agents are selected for matching to make paper, so that the production cost is reduced under the condition of ensuring the quality of the paper.

This production process flow is simple and practical, and the technology combines the component ratio, and the wet strong face tissue line of true qualities that obtains is fine and smooth, feels soft and smooth, has higher wet strength, meets the difficult fracture of water, can satisfy dry, wet dual-purpose, and the result of use is excellent, can improve the differentiation of enterprise's product, is favorable to improving enterprise's self market competition, has richened market product classification, gives the consumer more choices.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

(1) Natural color liquid bamboo pulp: the fiber is longer than hardwood, the fiber strength is higher than hardwood, the strength of finished paper is facilitated, the natural color liquid bamboo pulp is unbleached, bamboo is used as a raw material, the growth period of the bamboo is short, the environment is facilitated, the natural color liquid bamboo pulp is produced by the company, the natural color liquid bamboo pulp needs to be used, the occupation ratio is too high, the finished paper is hard, and the paper machine is not facilitated to dewater.

(2) Bleaching acacia wood pulp: the fiber strength is slightly poor, the finished paper has fine and smooth lines and good hand feeling, and is suitable for being defibered by a light knife, and the imported wood pulp has high price.

(3) Natural eucalyptus pulp: the finished paper has rough lines, poor hand feeling, low whiteness, easy color mixing, easy wrinkling, high yield, home-made natural-color hardwood pulp and low price.

(4) Natural broad leaf pulp: the finished paper has rough lines, poor hand feeling, more fiber bundles, increased deslagging frequency, more fine fiber content, poor water filtration performance, difficult dehydration of a paper machine, home-made natural broad leaf pulp and low price.

(5) Bleaching eucalyptus pulp: the fiber has moderate length, is easy to wrinkle, is beneficial to improving the productivity of a paper machine, has moderate finished paper lines, good hand feeling and high price of imported wood pulp.

The fiber length of the natural color liquid bamboo pulp is 1.6 mm-1.8 mm, the fiber width is kept at 14.0 mu m-14.8 mu m, and the thickness is 0.77 mg/m-0.09 mg/m; the length of the bleached acacia wood pulp is 730-0.900 mm, and the thickness is kept at 0.050-0.058 mg/m; the length of the natural eucalyptus pulp fiber is kept between 0.820mm and 0.900mm, and the thickness of the fiber is kept between 0.060mg/m and 0.076 mg/m; the length of the natural broad leaf pulp is kept between 0.9mm and 1.0mm, and the thickness is kept between 0.070mg/m and 0.085 mg/m; the length of the bleached eucalyptus pulp is between 0.8 and 1.0mm, and the thickness is kept between 0.052 and 0.062 mg/m.

The raw materials have advantages and disadvantages, the five sizing agents are matched according to the proportion of the invention, the advantages of the five sizing agents can be maintained as much as possible, so that the paper can ensure the strength and also can give consideration to the hand feeling, and after the quality and the production cost of the paper are integrated, the 5 raw materials are matched according to the proper proportion to produce the natural-color wettable water facial tissue paper, so that the natural-color wettable water facial tissue paper is a reasonable choice, the quality of the paper can be ensured, the production cost can be reduced, and the production of a paper machine is facilitated.