阅读说明：本技术 一种医疗防护覆膜专用纸及其生产方法 (Special paper for medical protective covering film and production method thereof ) 是由 莫建新 洪增源 戈玮玮 于 2020-12-30 设计创作，主要内容包括：本发明涉及一种医疗防护覆膜专用纸及其生产方法,生产方法采用先将北美针叶木浆和巴西阔叶木浆分别投入长、短纤碎浆机内进行碎解；然后泵入长、短纤叩前浆池；然后北美针叶木浆调整浓度后浆磨并进入长纤叩后浆池,巴西阔叶木浆调整浓度后疏解并进入短纤叩后浆池；二者按配比泵入混合浆池,调整浓度后磨浆,进入成浆池；然后稀释,并在成浆池出口加湿强剂,泵送到造纸机,得到目标产物。与现有技术相比,本发明产品可降解,且价格更有优势,既能满足基本的医疗防护需求,又不会造成环境污染,便宜、实用、环保。(The invention relates to a medical protection film-coated special paper and a production method thereof, wherein the production method comprises the steps of firstly, respectively putting North American softwood pulp and Brazil hardwood pulp into a long and short fiber pulper for disintegration; then pumping into a pulp pond before tapping of long and short fibers; then, adjusting the concentration of the North American softwood pulp, then grinding the North American softwood pulp, and feeding the North American softwood pulp into a long fiber beating pulp pond, adjusting the concentration of the Brazilian hardwood pulp, then defibering the Brazilian hardwood pulp, and feeding the Brazilian hardwood pulp into a short fiber beating pulp pond; the two are pumped into a mixed pulp tank according to the proportion, and are ground into pulp after the concentration is adjusted, and the pulp enters a pulping tank; then diluting, humidifying the strong agent at the outlet of the pulping tank, and pumping to a paper machine to obtain the target product. Compared with the prior art, the product of the invention is degradable, has more advantages in price, can meet the basic medical protection requirement, does not cause environmental pollution, and is cheap, practical and environment-friendly.)

1. A production method of medical protection film-coated special paper is characterized by comprising the following steps:

(1) respectively putting North America softwood pulp and Brazilian hardwood pulp into a long fiber pulper and a short fiber pulper, adding water for pulping, and then respectively pumping into a pulp pond before long fiber beating and a pulp pond before short fiber beating;

(2) adding water into North America softwood pulp from a pulp tank before long fiber beating to adjust the concentration, and cutting and devillicating the fiber by a pulping machine to enter a pulp tank after the long fiber beating;

(3) adding water into the Brazilian hardwood pulp from a pulp pond before short fiber beating to adjust the concentration, defibering the fibers by a defibering machine, and then feeding the defibered pulp into a pulp pond after short fiber beating;

(4) pumping North American softwood pulp and Brazil hardwood pulp into a mixed pulp tank, adding water from the mixed pulp tank to adjust the concentration, and further performing fibrillation treatment on fibers by a refiner to enter a pulping tank;

(5) diluting the concentration of the slurry from the slurry forming tank, humidifying a strengthening agent at the outlet of the slurry forming tank to obtain high wet strength, and then pumping the high wet strength to a paper machine;

(6) and diluting the slurry by a fan pump, and forming, squeezing and drying the slurry in a paper machine to obtain the special paper for the medical protective covering film.

2. The method for producing the paper special for the medical protective covering film according to claim 1, wherein in the step (1), water is added until the concentration is 5.0-7.0 wt%, and the disintegration time is 8-15 minutes.

3. The production method of the paper special for the medical protective covering film according to claim 1, wherein in the step (2), water is added to adjust the concentration to 4.0-5.0 wt%; and controlling the energy consumption of grinding to be 90-100 kwh/t.

4. The production method of the paper special for the medical protective covering film according to claim 1, wherein in the step (3), water is added to adjust the concentration to 4.0-5.0 wt%; the gap between the teeth of the fluffer is controlled to be 0.25-2.0 mm in the fluffing process.

5. The method for producing paper special for medical protective covering film according to claim 1, wherein in the step (4), the ratio of North American softwood pulp to Brazilian hardwood pulp is 40% -55% to 45% -60%.

6. The production method of the paper special for the medical protective covering film according to claim 1, wherein in the step (4), water is added to adjust the concentration to 3.0-4.0 wt%, and the grinding power is 35-45 kwh/t.

7. The production method of the paper special for the medical protective covering film according to claim 1, wherein in the step (5), the concentration of the slurry discharged from the slurry forming tank is diluted to 2.9-3.1 wt%; adding PPE wet strength agent 16-30 kg/t at the exit of the pulping tank.

8. The method for producing the paper special for the medical protective coating according to claim 1, wherein in the step (6), the paper is diluted to a concentration of 0.2 to 0.25 wt%.

9. The paper for medical protective coating film obtained by the production method according to any one of claims 1 to 8.

10. The special paper for the medical protective covering film according to claim 9, wherein the aspect ratio of the paper is controlled to be 1.6-2.0, and the elongation is controlled to be 15% -24%.

Technical Field

The invention relates to a paper product, in particular to a medical protective film-coated special paper and a production method thereof.

Background

The daily use paper is a traditional industry, and people's daily life can not leave the daily use paper. Although it is a fast-food product, the current market shows a saturated state of the production capacity of the household paper, and the rigid demand of the household paper is continuously increased, but the increase speed of the production capacity of the household paper is far lower than the increase speed of the production capacity of the household paper. This results in a state of excess production of the household paper, and the operating rate of the enterprise is continuously reduced. In addition, the high concentration of paper manufacturers for daily use leads to increasingly strong competition of the traditional paper for daily use.

The competitive pressure of the traditional household paper is getting stronger, and the search for new fields and new products is a necessary way for a plurality of small and medium-sized enterprises producing the household paper to survive and develop. The traditional medical protection products are basically occupied by the non-woven fabrics due to the natural advantages of toughness, durability, difficult abrasion and the like of the non-woven fabrics, but most of the non-woven fabrics are made of chemical particles such as PP, PET, PE and the like, so that most of the non-woven fabrics cannot be degraded, and a series of environmental pollution problems are caused. In the face of increasing global environmental pollution problems, it is imperative to seek degradable nonwovens or other products that are degradable to replace them. Meanwhile, the problem of global more serious environmental pollution is that the traditional medical protection products are changed from non-degradable non-woven fabrics to degradable materials, which is a necessary trend for development.

Disclosure of Invention

The invention aims to provide special paper for a medical protective coating and a production method thereof. The product of the invention is degradable, has more advantages in price, can meet the basic medical protection requirement, does not cause environmental pollution, and is cheap, practical and environment-friendly.

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

the invention provides a production method of medical protective film-coated special paper, which comprises the following steps:

(1) respectively putting North America softwood pulp and Brazilian hardwood pulp into a long fiber pulper and a short fiber pulper, adding water for pulping, and then respectively pumping into a pulp pond before long fiber beating and a pulp pond before short fiber beating;

(2) adding water into North America softwood pulp from a pulp tank before long fiber beating to adjust the concentration, and cutting and devillicating the fiber by a pulping machine to enter a pulp tank after the long fiber beating;

(3) adding water into the Brazilian hardwood pulp from a pulp pond before short fiber beating to adjust the concentration, defibering the fibers by a defibering machine, and then feeding the defibered pulp into a pulp pond after short fiber beating;

(4) pumping North American softwood pulp and Brazil hardwood pulp into a mixed pulp tank, adding water from the mixed pulp tank to adjust the concentration, and further performing fibrillation treatment on fibers by a refiner to enter a pulping tank;

(5) diluting the concentration of the slurry from the slurry forming tank, humidifying a strengthening agent at the outlet of the slurry forming tank to obtain high wet strength, and then pumping the high wet strength to a paper machine;

(6) and diluting the slurry by a fan pump, and forming, squeezing and drying the slurry in a paper machine to obtain the special paper for the medical protective covering film.

Preferably, in the step (1), water is added to a concentration of 5.0-7.0 wt%, and the disintegration time is 8-15 minutes.

Preferably, in the step (2), water is added to adjust the concentration to 4.0-5.0 wt%; and controlling the energy consumption of grinding to be 90-100 kwh/t.

Preferably, in the step (3), water is added to adjust the concentration to 4.0-5.0 wt%; the gap between the teeth of the fluffer is controlled to be 0.25-2.0 mm in the fluffing process.

Preferably, in the step (4), the ratio of the North American softwood pulp to the Brazilian hardwood pulp is 40% -55% to 45% -60%.

Preferably, in the step (4), water is added to adjust the concentration to 3.0-4.0 wt%, and the grinding power is 35-45 kwh/t.

Preferably, in the step (5), the concentration of the slurry from the slurry forming pool is diluted to 2.9-3.1 wt%; adding PPE wet strength agent 16-30 kg/t at the exit of the pulping tank. The PPE wet strength agent is fully called polyamide polyepichlorohydrin resin, is a nontoxic and tasteless papermaking auxiliary agent which can greatly improve the dry and wet strength of paper sheets, has the characteristics of retention and drainage, and can be used as a retention agent and a drainage aid in the papermaking process.

Preferably, in the step (6), the diluted solution is diluted to a concentration of 0.2 to 0.25 wt%.

The second aspect of the invention provides the special paper for the medical protective covering film obtained by the production method.

Preferably, the aspect ratio of the paper is controlled between 1.6 and 2.0, and the elongation is controlled between 15% and 24%.

The special paper for the medical protection coating film can replace a part of non-woven fabric and meet the daily medical protection requirement. The invention is a protective tool based in medical treatment, compared with the traditional protective product, the product of the invention is degradable, has more advantages in price, can meet the basic medical protective requirement, does not cause environmental pollution, and is cheap, practical and environment-friendly.

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

(1) the product of the invention has strong paper quality and delicate and thick hand feeling.

(2) The base paper produced by the invention has high dry and wet tension and can be used for both dry and wet purposes.

(3) The elongation of the base paper is controlled to be 15% -24%, which is beneficial to smooth of the covering film.

(4) The aspect ratio of the base paper is controlled to be 1.6-2.0 to improve the stiffness and the thick feeling of the base paper.

(5) The product of the invention is 100% natural fiber, can be naturally degraded and is environment-friendly.

(6) High-quality raw wood pulp in a specific proportion is mixed for use, and two pulping machines optimize pulping to ensure that paper has good strength.

Detailed Description

A production method of medical protective film-coated special paper comprises the following steps:

(1) respectively putting North America softwood pulp and Brazilian hardwood pulp into a long fiber pulper and a short fiber pulper, adding water for pulping, and then respectively pumping into a pulp pond before long fiber beating and a pulp pond before short fiber beating;

(2) adding water into North America softwood pulp from a pulp tank before long fiber beating to adjust the concentration, and cutting and devillicating the fiber by a pulping machine to enter a pulp tank after the long fiber beating;

(3) adding water into the Brazilian hardwood pulp from a pulp pond before short fiber beating to adjust the concentration, defibering the fibers by a defibering machine, and then feeding the defibered pulp into a pulp pond after short fiber beating;

(4) pumping North American softwood pulp and Brazil hardwood pulp into a mixed pulp tank, adding water from the mixed pulp tank to adjust the concentration, and further performing fibrillation treatment on fibers by a refiner to enter a pulping tank;

(5) diluting the concentration of the slurry from the slurry forming tank, humidifying a strengthening agent at the outlet of the slurry forming tank to obtain high wet strength, and then pumping the high wet strength to a paper machine;

(6) and diluting the slurry by a fan pump, and forming, squeezing and drying the slurry in a paper machine to obtain the special paper for the medical protective covering film.

In the step (1), water is preferably added until the concentration is 5.0-7.0 wt%, and the disintegration time is 8-15 minutes. In the step (2), water is preferably added to adjust the concentration to 4.0-5.0 wt%; and controlling the energy consumption of grinding to be 90-100 kwh/t. In the step (3), water is preferably added to adjust the concentration to 4.0-5.0 wt%; the gap between the teeth of the fluffer is controlled to be 0.25-2.0 mm in the fluffing process. In the step (4), the preferred proportion of the North American softwood pulp and the Brazilian hardwood pulp is 40-55 percent to 45-60 percent; preferably, water is added to adjust the concentration to 3.0-4.0 wt%, and the grinding power is 35-45 kwh/t. In the step (5), preferably, the concentration of the slurry from the slurry forming pool is diluted to 2.9-3.1 wt%; adding PPE wet strength agent 16-30 kg/t at the exit of the pulping tank. In the step (6), the solution is preferably diluted to a concentration of 0.2 to 0.25 wt%.

The medical protective film-covering special paper obtained by the method. The aspect ratio of the paper is controlled between 1.6 and 2.0, and the elongation is controlled between 15 and 24 percent.

The present invention will be described in detail with reference to specific examples.

Example 1

A production method of low-quantitative medical protective peritoneum special paper comprises the following process steps:

(1) respectively putting North America softwood pulp and Brazilian hardwood pulp into a long and short fiber pulping machine, adding water until the concentration is 6.45 wt%, respectively carrying out pulping for 12 minutes, and then respectively pumping into a pulp pond before long and short fibers are knocked;

(2) north American softwood pulp is added with water from a pulp tank before long fiber beating to adjust the concentration to about 4.55 wt%, passes through a pulp grinder, has the pulp grinding energy consumption of 95kwh/t, and mainly cuts fibers, and enters a pulp tank after long fiber beating after the fibers are devillicate to a certain degree;

(3) adding water into the Brazilian hardwood pulp from a pulp pond before short fiber beating to adjust the concentration to about 4.64 wt%, passing through a fluffer, adjusting the gap between teeth of the fluffer to 0.26mm, and pumping the defibered hardwood pulp into a pulp pond after short fiber beating after fiber fluffing;

(4) mixing 42% of North American softwood pulp and 58% of Brazilian hardwood pulp in proportion, pumping the mixture into a mixed pulp tank, adding water to adjust the concentration to be 3.36 wt%, passing through a refiner, enabling the refining energy consumption to be 38kwh/t, and further performing fibrillation treatment on fibers to enter a pulping tank;

(5) the concentration of the pulp from the pulping tank is diluted to 2.98 wt%, 20kg/t wet strength agent is added at the outlet of the pulping tank, and the pulp is pumped to a paper machine;

(6) diluting the slurry to the concentration of 0.24 wt% by a fan pump, forming, pressing and drying the slurry in a paper machine, and setting the wrinkling of the paper machine process to be 16.5% to obtain the low-basis-weight medical protective peritoneum special paper;

(7) the longitudinal tension of the low-quantitative medical protective peritoneum special paper is not lower than 2000 mN; the transverse direction is not less than 1000mN, the elongation is controlled to be 16% -20%, and the aspect ratio of the base paper is controlled to be about 1.8.

Example 2

A production method of high-quantitative medical protective peritoneum special paper comprises the following process steps:

(1) respectively putting North American softwood pulp and Brazilian hardwood pulp into a long and short fiber pulping machine, adding water until the concentration is 6.15 wt%, respectively carrying out pulping for 14 minutes, and then respectively pumping into a pulp pond before long and short fibers are knocked;

(2) adding water into North America softwood pulp from a pulp tank before long fiber beating to adjust the concentration to about 4.13 wt%, passing through a pulp grinder, grinding the pulp with energy consumption of 95kwh/t, cutting the fiber, brooming the fiber to a certain degree, and then feeding the fiber into a pulp tank after long fiber beating;

(3) adding water into the Brazilian hardwood pulp from a pulp tank before short fiber beating to adjust the concentration to 4.26 wt%, passing through a fluffer, adjusting the gap between teeth of the fluffer to 0.25mm, and pumping the defibered hardwood pulp into a pulp tank after short fiber beating after fiber fluffing;

(4) mixing 48% of North American softwood pulp and 52% of Brazilian hardwood pulp in proportion, pumping the mixture into a mixed pulp tank, adding water to adjust the concentration to be 3.18 wt%, passing through a refiner, enabling the refining energy consumption to be 42kwh/t, and further performing fibrillation treatment on fibers to enter a pulping tank;

(5) the concentration of the pulp from the machine chest is diluted to 2.89 wt%, 26kg/t wet strength agent is added at the outlet of the machine chest, and the wet strength agent are pumped to a paper machine together;

(6) diluting the slurry to the concentration of 0.22 wt% by a fan pump, forming, pressing and drying in a paper machine, and controlling the wrinkling of the paper machine process to be 18% to obtain the high-quantitative medical protective peritoneum special paper.

(7) The longitudinal tension of the high-quantitative medical protective peritoneal special paper is not lower than 5500 mN; transverse direction is not less than 2500mN, elongation is controlled to be 18% -24%, and aspect ratio of base paper is controlled to be about 1.8.

The embodiments described above are intended to facilitate the understanding and use of the invention by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.