阅读说明：本技术 一种乳霜基纸的制备方法 (Preparation method of cream base paper ) 是由 孔佳锦 莫建新 黄海丽 于 2021-01-30 设计创作，主要内容包括：本发明涉及一种乳霜基纸的制备方法,该方法包括以下步骤：(1)纸浆碎解,之后泵入长纤叩前浆池；(2)浆料泵入混合浆池,再加入柔软剂；(3)将经过精浆机,对纤维轻微处理后进入成浆池；(4)加入湿强剂,并调浓稀释,准备泵送到纸机；(5)将浆料经冲浆泵稀释,然后进入造纸机成形、压榨和干燥；(6)经干燥后的纸张经起皱刀起皱,再经卷纸缸卷取成初卷原纸后至复卷分切成乳霜基纸。与现有技术相比,本发明选用特定优质进口浆种以特定比例混合,采用低叩解度打浆方式,添加特定用量的安全性、功能性优的化学品,选用纳米陶瓷起皱刀来生产满足客户喷涂乳霜要求的乳霜基纸。(The invention relates to a preparation method of cream base paper, which comprises the following steps: (1) pulping, and then pumping into a pulp tank before long fiber beating; (2) pumping the slurry into a mixed slurry pool, and adding a softening agent; (3) slightly treating the fibers by a refiner and then feeding the fibers into a pulping tank; (4) adding a wet strength agent, adjusting concentration and diluting, and preparing to pump to a paper machine; (5) diluting the pulp by a fan pump, and then entering a paper machine for forming, squeezing and drying; (6) the dried paper is wrinkled by a wrinkling knife, coiled into primary coiled base paper by a paper coiling cylinder, and then rewound and cut into cream base paper. Compared with the prior art, the invention selects specific high-quality imported pulp seeds to mix according to a specific proportion, adopts a low-beating degree beating mode, adds specific dosage of chemicals with excellent safety and functionality, and selects a nano ceramic creping blade to produce the cream base paper meeting the requirement of spraying cream by a customer.)

1. A method for preparing cream-based paper is characterized by comprising the following steps:

(1) sequentially putting North American imported softwood pulp, Brazilian imported hardwood pulp, North American imported softwood pulp and Brazilian imported hardwood pulp into a long fiber pulper at intervals, adding CMC, adding water for dilution, then performing disintegration, and then pumping into a long fiber pre-beating pulp pond;

(2) adding water into the slurry obtained in the step (1) to adjust the concentration, slightly cutting and fibrillating the fibers by a pulping machine, and then feeding the fibers into a pulp tank after long fiber beating;

(3) sequentially putting Brazilian imported hardwood pulp into a short fiber pulper, adding CMC, adding water for dilution, then performing disintegration, and then pumping into a pulp pond before long fiber beating;

(4) adding water into the slurry obtained in the step (3) to adjust the concentration, slightly defibering the fibers by a defibering machine, and then feeding the fibers into a post-short-fiber beating slurry pool;

(5) pumping the slurry obtained in the step (2) and the slurry obtained in the step (4) into a mixed slurry pool, and adding a softening agent;

(6) adding water into the slurry obtained in the step (5) to adjust the concentration, slightly treating the fibers by a refiner, and then feeding the fibers into a pulping pool;

(7) adding a wet strength agent into the slurry obtained in the step (6), adjusting concentration and diluting, and preparing to pump to a paper machine;

(8) diluting the pulp by a fan pump, and then entering a paper machine for forming, squeezing and drying;

(9) the dried paper is wrinkled by a wrinkling knife, coiled into primary coiled base paper by a paper coiling cylinder, and then rewound and cut into cream base paper.

2. The method for preparing the cream base paper according to claim 1, wherein the mass ratio of the dry weight of the north american softwood pulp, the brazilian hardwood pulp, the north american softwood pulp and the brazilian hardwood pulp which are input for the first time in the step (1) is (60-70):50 (90-100): 20-30); the mass ratio of the addition amount of the CMC to the slurry is 0.2-0.3 kg/t; the concentration of the diluted solute is 5.0-8.0 omega t%; the time for disintegration is 10-15 min.

3. The method for preparing cream base paper according to claim 1, wherein the concentration is adjusted in the step (2) to a solute concentration of 4.0-5.0 ω t%; the energy consumption of the pulping machine is 40-60 kW.h/t, the beating degree of the pulp is controlled to be 20-21 DEG SR, and the wet weight is 12-14 g.

4. The method for preparing cream base paper according to claim 1, wherein the CMC added in the step (3) is 0.2-0.3kg/t based on the mass ratio of the slurry; the concentration of the diluted solute is 5.0-8.0 omega t%; the time for disintegration is 10-15 min.

5. The method for preparing cream base paper according to claim 1, wherein the concentration is adjusted in the step (4) to a solute concentration of 4.0-5.0 ω t%; the intertooth space of the fluffer is 0.25-2.0mm, the rotating speed is 1200-1500rpm, the beating degree of the slurry is controlled to be 19-20 DEG SR, and the wet weight is 2.3-2.9 g.

6. The method for preparing the cream-based paper as claimed in claim 1, wherein in the step (5), the mass ratio of the pulp obtained in the step (2) to the pulp obtained in the step (4) is (25-35): 65-75); the mass ratio of the addition amount of the softening agent to the pulp is 0.6-1.2 kg/t.

7. The method for preparing cream base paper according to claim 1, wherein the concentration is adjusted in the step (6) to a solute concentration of 3.0-4.0 ω t%; the refiner has the refining energy consumption of 0-3 kW.h/t, the beating degree of the pulp is controlled to be 22-23 DEG SR, and the wet weight is 5-8 g.

8. The method for preparing cream-based paper as claimed in claim 1, wherein the wet strength agent added in step (7) is 15-25kg/t based on the mass of the pulp, and the wet strength agent is concentrated and diluted to a solute concentration of 2.8-3.1 ω t%.

9. The method of claim 1, wherein the diluting in step (8) is performed to a solute concentration of 0.2-0.28 ω t%.

10. The method of claim 1, wherein the crepe rate in step (9) is 24-28%.

Technical Field

The invention relates to the field of papermaking, and particularly relates to a preparation method of cream base paper.

Background

Along with the continuous improvement of the living standard of people, people pay more and more attention to the quality of life. The demand for paper for fast-consumption daily use is also increasing, and in particular, the texture of facial tissues which are frequently used for wiping the face, mouth, nose and the like is required to be higher and higher, and paper with better texture is more popular with consumers.

And the cream paper endows the paper with softness, smoothness and moisture retention far superior to those of common facial tissue. The biggest characteristic of the facial tissue paper is that moisturizing cream components are added into the facial tissue paper, so that the softness, smoothness and moisturizing degree of the facial tissue paper are greatly improved. The cream paper has silky smooth like silk and soft like cotton, and not only has little irritation to sensitive skin, but also has moisturizing effect. The facial tissues bring experiences which cannot be brought by common facial tissues to consumers, are salvage for cold patients, rhinitis patients and sensitive skin patients, and are excellent choices for tender and lovely skin of newborn infants and mothers.

In the production of the cream paper, a suitable ultra-soft type cream facial tissue base paper, namely cream base paper, needs to be found, and cream liquid is sprayed on the base paper to form a final cream paper product. The common facial tissue cannot be used as a spraying carrier of the cream paper due to the fact that the common facial tissue has insufficient smoothness, wettability, cotton velvet and thickness.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a preparation method of cream base paper with good smoothness, wettability and cotton wool and thickness.

The purpose of the invention can be realized by the following technical scheme:

therefore, the invention aims to develop the base paper (cream base paper) which meets the ultra-soft smooth soft characteristic of the cream facial paper, not only can reduce the cost of spraying cream, but also can optimize the texture of the finished cream paper.

A method for preparing cream-based paper, comprising the steps of:

(1) sequentially putting North American imported softwood pulp, Brazilian imported hardwood pulp, North American imported softwood pulp and Brazilian imported hardwood pulp into a long fiber pulper at intervals, adding CMC, adding water for dilution, then performing disintegration, and then pumping into a long fiber pre-beating pulp pond;

(2) adding water into the slurry obtained in the step (1) to adjust the concentration, slightly cutting and fibrillating the fibers by a pulping machine, and then feeding the fibers into a pulp tank after long fiber beating;

(3) sequentially putting Brazilian imported hardwood pulp into a short fiber pulper, adding CMC, adding water for dilution, then performing disintegration, and then pumping into a pulp pond before long fiber beating;

(4) adding water into the slurry obtained in the step (3) to adjust the concentration, slightly defibering the fibers by a defibering machine, and then feeding the fibers into a post-short-fiber beating slurry pool;

(5) pumping the slurry obtained in the step (2) and the slurry obtained in the step (4) into a mixed slurry pool, and adding a softening agent;

(6) adding water into the slurry obtained in the step (5) to adjust the concentration, slightly treating the fibers by a refiner, and then feeding the fibers into a pulping pool;

(7) adding a wet strength agent into the slurry obtained in the step (6), adjusting concentration and diluting, and preparing to pump to a paper machine;

(8) diluting the pulp by a fan pump, and then entering a paper machine for forming, squeezing and drying;

(9) the dried paper is wrinkled by a wrinkling knife, coiled into primary coiled base paper by a paper coiling cylinder, and then rewound and cut into cream base paper.

Further, in the step (1), the mass ratio of the dry weight of the air of the first input North American softwood pulp, the first input Brazilian hardwood pulp, the second input North American softwood pulp and the second input Brazilian hardwood pulp is (60-70):50, (90-100): 20-30); the mass ratio of the addition amount of the CMC to the slurry is 0.2-0.3 kg/t; the concentration of the diluted solute is 5.0-8.0 omega t%; the time for disintegration is 10-15 min.

Further, in the step (2), the concentration is adjusted to be 4.0-5.0 omega t% of solute concentration; the energy consumption of the pulping machine is 40-60 kW.h/t, the beating degree of the pulp is controlled to be 20-21 DEG SR, and the wet weight is 12-14g, namely light pulping is needed in the aspect of pulping.

North American imported softwood pulp is imported North American iridescent softwood pulp, and iridescent softwood pulp has the characteristics of slender fibers, good flexibility and average fiber length of 2.28 mm; the Brazilian imported hardwood pulp is the characteristic fiber of imported Brazilian goldfish hardwood pulp, namely goldfish hardwood pulp, is short and thick, the average fiber length is 0.75mm, the average fiber thickness is 6.3mg/100mm, and the finished paper is good in bulk and strong in absorption performance. The two kinds of pulp are matched in a proper proportion to produce the cream base paper which meets the requirements of soft and thick hand feeling and good absorption performance. In the step (1), the optimal proportion of the long and short fibers can be obtained at intervals of feeding, and the using amount of softwood pulp is reduced. The CMC obtained in the steps (1) and (3) is sodium carboxymethylcellulose with the model of NX-30, and can neutralize the charge of a system so as to enable the water system to reach a more balanced and stable state. And certain strength is increased, so that the paper is soft and has certain toughness.

Further, the mass ratio of the addition amount of the CMC in the step (3) to the slurry is 0.2-0.3 kg/t; the concentration of the diluted solute is 5.0-8.0 omega t%; the time for disintegration is 10-15 min.

Further, in the step (4), the concentration is adjusted to be 4.0-5.0 omega t% of solute concentration; the intertooth space of the fluffer is 0.25-2.0mm, the rotating speed is 1200-1500rpm, the beating degree of the slurry is controlled to be 19-20 DEG SR, and the wet weight is 2.3-2.9 g.

Further, in the step (5), the mass ratio of the slurry obtained in the step (2) to the slurry obtained in the step (4) is (25-35) to (65-75); the mass ratio of the addition amount of the softening agent to the pulp is 0.6-1.2 kg/t. The softening agent is a Soxhlet softening agent, the model is TQ236, the softening agent has strong bond-breaking effect, and the dosage of the softening agent can achieve the best softness effect.

Further, in the step (6), the concentration is adjusted to be 3.0-4.0 omega t% of solute concentration; the pulping energy consumption of the refiner is controlled to be 0-3 kW.h/t by no feeding or the control, the beating degree of the pulp is controlled to be 22-23 DEG SR, and the wet weight is controlled to be 5-8 g.

The low beating degree is controlled and the fibers are slightly polished in the steps (2), (4), (5) and (6) so as to enable the paper to achieve the characteristics of softness, bulkiness, fluffiness and strong absorbability, facilitate the rear end to absorb the emulsion and achieve the best hand feeling.

Further, the mass ratio of the wet strength agent added in the step (7) to the pulp is 15-25kg/t, and the wet strength agent is concentrated and diluted to the solute concentration of 2.8-3.1 omega t%. The wet strength agent is a Soxhlet wet strength agent with the model number of 777LX, the dosage of the wet strength agent can ensure high wet strength, paper is not easy to break in a wet state in a cream coating process, the wet strength agent has high safety performance, and the cream paper is mainly used for wiping sensitive skin on the faces of mouths, noses, eyes and the like and tender skin of infants.

Further, the dilution in step (8) is carried out to a solute concentration of 0.2-0.28 ω t%.

Further, the wrinkling rate in step (9) is 24-28%. The wrinkling knife is an intelligent novel nano ceramic wrinkling scraper, compared with a steel knife, wrinkles can be finer and smoother, paper is smoother, silky texture like silk is achieved, hand feeling is stable, and the intelligent novel nano ceramic wrinkling scraper can be continuously produced for 15-20 hours without changing a knife. The wrinkling rate is controlled to be 24-28%, and the thick feeling of the paper can be ensured.

Compared with the prior art, the invention has the following advantages:

(1) the softwood pulp is imported North American rainbow fish softwood pulp, and the hardwood pulp is imported Brazilian goldfish hardwood eucalyptus pulp. The iris conifer wood pulp has the characteristics of slender fiber, good flexibility, average fiber length of 2.28mm, thick and short characteristic fiber of goldfish hardwood pulp, average fiber length of 0.75mm, average fiber thickness of 6.3mg/100mm, good bulk and strong absorption performance; the two kinds of pulp are matched in a proper proportion to produce cream base paper which meets the requirements of soft and thick hand feeling and good absorption performance; meanwhile, an intermediate feeding mode is adopted, so that the optimized proportion of the long fibers and the short fibers can be obtained, and the using amount of softwood pulp is reduced;

(2) the low beating degree is controlled, and the fibers are slightly polished, so that the paper has the characteristics of softness, bulkiness, fluffiness and strong absorbability, the rear end of the paper can conveniently absorb the emulsion, and the hand feeling is optimal;

(3) the softening agent is a Soxhlet softening agent with the model of TQ236, has strong bond-breaking effect, and can achieve the best softness effect by controlling the using amount of the softening agent to be 0.6-1.2kg/t of paper; CMC is sodium carboxymethylcellulose with a constant content of NX-30, and the dosage of CMC is controlled to be 0.2-0.3kg/t of paper, so that the charge of the system can be neutralized, and the water system can reach a relatively balanced and stable state. And certain strength is increased, so that the paper is soft and has certain toughness;

(4) the wet strength agent is a Soxhlet wet strength agent, the model is 777LX, the using amount of the wet strength agent is controlled to be 15-25kg/t of paper, the high wet strength can be ensured, the paper is not easy to break in a wet state in a cream coating process, the wet strength agent is high in safety performance, and the cream paper is mainly used for wiping sensitive skin of the face such as mouth, nose and eyes and tender skin of infants;

(5) the wrinkling knife is a nano ceramic wrinkling scraper, and compared with a steel knife, the wrinkling knife can enable wrinkles to be finer and smoother, paper quality to be smoother, silky texture like silk is achieved, hand feeling is stable, and the nano ceramic wrinkling scraper can be continuously produced for 15-20 hours without changing a knife. The wrinkling rate is controlled to be 24-28%, and the thick feeling of the paper can be ensured.

Detailed Description

The following examples are given for the detailed implementation and specific operation of the present invention, but the scope of the present invention is not limited to the following examples.

Example 1

A method for preparing cream-based paper, comprising the steps of:

(1) feeding 3 bags of North American imported softwood pulp (wind dry weight 230 kg/bag) and 2 bags of Brazilian imported hardwood pulp (wind dry weight 250 kg/bag) and 4 bags of North American imported softwood pulp (wind dry weight 230 kg/bag) and 1 bag of Brazilian imported hardwood pulp (wind dry weight 250 kg/bag) into a long fiber pulper at intervals, adding 0.25kg/t CMC, adding white water to the concentration of 6.5 omega t%, performing disintegration for 12 minutes, and pumping into a pulp pond before long fiber beating;

(2) 5 bags (wind dry weight 250 kg/bag) of Brazil imported hardwood pulp are put into a short fiber pulper, 0.28kg/t CMC is added, white water is added until the concentration is 6.5 omegat percent, then the mixture is crushed for 10 minutes, and then the mixture is pumped into a pulp pond before short fiber beating;

(3) adding water into the pulp obtained in the step (1) to adjust the concentration to be about 4.6 omega t%, passing through a pulp grinder, controlling the beating degree of the pulp to be 20.5 DEG SR and the wet weight to be 13g by controlling the energy consumption of the pulp grinding to be 50 kW.h/t, namely, light pulp grinding is needed in the aspect of pulp grinding, and the pulp enters a pulp tank after long fiber beating after slightly cutting and devillicating the fibers;

(4) adding water into the pulp obtained in the step (2) to adjust the concentration to be about 4.6 omega t%, passing through a fluffer, slightly defibering fibers, and then entering a pulp tank after short fiber beating by controlling the intertooth gap of the fluffer to be 1.8mm and the rotating speed to be 1450rpm, controlling the beating degree of the pulp to be 19 DEG SR and the wet weight to be 2.8 g;

(5) pumping the slurry obtained in the step (3) into a mixed slurry pool according to the mass ratio of 32% and the slurry obtained in the step (4) according to the mass ratio of 68%, and adding 0.7kg/t of softening agent into the slurry in the mixed slurry pool;

(6) adding water into the pulp obtained in the step (5) to adjust the concentration to be about 3.6 omega t%, passing through a refiner, controlling the pulping energy consumption to be 0 by no feed, controlling the beating degree of the pulp to be 22 DEG SR and the wet weight to be about 7.5g, slightly treating the fibers, and then entering a pulping pool;

(7) adding 19kg/t of wet strength agent into the slurry obtained in the step (6), and adjusting concentration and diluting to the concentration of 3.0 omega t%, and preparing to pump to a paper machine;

(8) the pulp is diluted to a concentration of 0.25 omega t by a fan pump and enters a paper machine for forming, squeezing and drying.

(9) The paper dried by the drying cylinder and the air hood is wrinkled by a wrinkling cutter, the wrinkling rate is controlled to be 25%, and the paper is reeled by a paper reeling cylinder into primary coiled base paper and then is cut into cream base paper in a rewinding way.

Example 2

A method for preparing cream-based paper, comprising the steps of:

(1) feeding 3 bags of North American imported softwood pulp (wind dry weight 230 kg/bag) and 2 bags of Brazilian imported hardwood pulp (wind dry weight 250 kg/bag) and 4 bags of North American imported softwood pulp (wind dry weight 230 kg/bag) and 1 bag of Brazilian imported hardwood pulp (wind dry weight 250 kg/bag) into a long fiber pulper at intervals, adding 0.22kg/t CMC, adding white water to the concentration of 6.0 omega t%, performing disintegration for 15 minutes, and pumping into a pulp pond before long fiber beating;

(2) 5 bags (wind dry weight 250 kg/bag) of Brazil imported hardwood pulp are put into a short fiber pulper, 0.26kg/t CMC is added, white water is added until the concentration is 6.0 omega t%, then the mixture is crushed for 12 minutes, and then the mixture is pumped into a pulp pond before short fiber beating;

(3) adding water into the pulp obtained in the step (1) to adjust the concentration to be about 4.2 omega t%, passing through a pulp grinder, controlling the beating degree of the pulp to be 21 DEG SR and the wet weight to be 12.5g by controlling the energy consumption of the pulp grinding to be 55 kW.h/t, namely, light pulp grinding is needed in the aspect of pulp grinding, and the pulp enters a pulp tank after long fiber beating after slightly cutting and devillicating the fibers;

(4) adding water into the slurry obtained in the step (2) to adjust the concentration to be about 4.2 omega t%, passing through a fluffer, slightly defibering fibers, and then entering a pulp tank after short fiber beating by controlling the intertooth gap of the fluffer to be 1.5mm and the rotating speed to be 1400rpm, controlling the beating degree of the slurry to be 20 DEG SR and the wet weight to be 2.5 g;

(5) pumping the slurry obtained in the step (3) into a mixed slurry pool according to the mass ratio of 34% and the slurry obtained in the step (4) according to the mass ratio of 66%, and adding 0.9kg/t of softening agent into the slurry in the mixed slurry pool;

(6) adding water into the pulp obtained in the step (5) to adjust the concentration to about 3.3 omega t%, passing through a refiner, controlling the pulping energy consumption to be 0 by no feed, controlling the beating degree of the pulp to be 23 DEG SR, and controlling the wet weight to be 6.8g, slightly treating the fibers, and then entering a pulping pool;

(7) adding 16kg/t of wet strength agent into the slurry obtained in the step (6), and adjusting concentration and diluting to the concentration of 2.95 omega t%, and preparing to pump to a paper machine;

(8) the slurry was diluted to a concentration of 0.22 wt% by a fan pump and fed to a paper machine for forming, pressing and drying.

(9) The paper dried by the drying cylinder and the air hood is wrinkled by a wrinkling cutter, the wrinkling rate is controlled to be 26%, and the paper is reeled by a paper reeling cylinder into primary coiled base paper and then is cut into cream base paper in a rewinding way.

The properties of examples 1-2 and conventional plain tissue paper are as follows:

wherein, the specific slurry selected in the steps (1) and (3) and the pulping mode with the controlled low beating degree in the steps (2), (4), (5) and (6) are the key for ensuring the soft and thick handfeel, and the nano ceramic wrinkling scraper in the step (9) is the key for ensuring the fine and smooth handfeel.