阅读说明：本技术 一种提高纱管原纸厚度的方法 (Method for increasing thickness of bobbin base paper ) 是由 姚利军 胡锦 陈务平 丁霞 张东 于 2021-06-28 设计创作，主要内容包括：本发明公开了一种提高纱管原纸厚度的方法,涉及废纸制浆造纸技术领域,采用废旧宝塔纸管为主要原料,再添加适当的废铁渣无机纤维棉,通过减少淀粉的使用,再添加0.2%非离子型助剂来提高纸的结合强度,节约生产成本。所选用的非离子型助剂含有阴阳两种离子,根据两种不同纤维的电荷分布情况来改变,将两种纤维牢固的连接在一起,从而增加纤维间的结合力,但纸的厚度不会降低。(The invention discloses a method for improving the thickness of bobbin base paper, which relates to the technical field of pulping and papermaking by waste paper, adopts waste pagoda paper tubes as a main raw material, adds proper waste iron slag inorganic fiber cotton, improves the bonding strength of paper by reducing the use of starch and adding 0.2% of nonionic auxiliary agent, and saves the production cost. The selected non-ionic auxiliary agent contains anion and cation ions, changes according to the charge distribution condition of two different fibers, and firmly connects the two fibers together, so that the bonding force between the fibers is increased, but the thickness of the paper cannot be reduced.)

1. A method for improving the thickness of base paper of a bobbin is characterized by comprising the following steps: the method comprises the following steps:

s1, adopting waste pagoda paper tubes and steel mill waste iron slag as main raw materials;

s2, the waste pagoda paper tubes are changed into small fragments by a paper shredder, water is added for dilution and stirring to form a pulp, impurities in the pulp are removed by a deslagging device, fibers are devillicate and broomed by a conical refiner and a double-disc refiner, the filamentous fibers are changed into flocculent fibers, and the flocculent fibers are stored in a No. 1 pulp storage tank;

s3, completely melting the waste iron slag raw material in a high-temperature melting furnace, blowing the waste iron slag raw material into filamentous fibers under the centrifugal force action of a high-speed centrifuge, cooling the filamentous fibers, adding an inorganic fiber modifier to enable the filamentous fibers to become flocculent fibers, and storing the flocculent fibers in a No. 2 slurry storage tank;

s4, accurately proportioning and uniformly mixing the two prepared fiber pulps according to a preset proportion requirement through an automatic proportion regulating valve, storing the mixture in a pulp proportioning pool, adding a small amount of non-ionic auxiliary agent and cationic starch, uniformly stirring and mixing the mixture, and sending the mixture to a pulp forming pool for later use;

and S5, diluting the prepared slurry, feeding the diluted slurry to a sheet making machine, stirring, standing, dehydrating and drying to obtain the bobbin base paper with a certain thickness.

2. The method for increasing the thickness of the bobbin base paper as claimed in claim 1, wherein the method comprises the following steps: in the step S3, the temperature of the high-temperature smelting furnace is raised to 1500-1700 ℃.

3. The method for increasing the thickness of the bobbin base paper as claimed in claim 1, wherein the method comprises the following steps: and S3, cooling to 50-80 ℃.

4. The method for increasing the thickness of the bobbin base paper as claimed in claim 1, wherein the method comprises the following steps: in the step S4, the prepared waste iron slag inorganic fiber and the waste pagoda paper tube organic fiber are respectively mixed according to the weight ratio of 10-20: 90-80 proportion.

5. The method for increasing the thickness of the bobbin base paper as claimed in claim 1, wherein the method comprises the following steps: and step S4, adding 0.2% of nonionic auxiliary agent and 0.5% -1.0% of cationic starch.

6. The method for increasing the thickness of the bobbin base paper as claimed in claim 1, wherein the method comprises the following steps: and step S5, diluting the slurry to a concentration of 0.8% -1.0%.

Technical Field

The invention relates to the technical field of pulping and papermaking by waste paper, in particular to a method for improving the thickness of bobbin base paper.

Background

The bobbin base paper is mainly used for processing high-strength chemical fiber tubes, textile bobbins, various industrial paper tubes, paper tubes for plastic films and the like, and the paper tube products are generally applied to the paper making industry, the packaging industry and the textile chemical fiber industry due to the advantages of degradability, low cost, light weight, convenience in transportation, easiness in recovery, no pollution and the like. It can be used as the inner core of various web papers and paperboards, and also as the textile bobbin for synthetic filament, terylene, polypropylene, spandex, etc., especially the paper tube used in textile industry has gradually replaced the cone-shaped bobbin.

The main raw material for bobbin base paper production is waste corrugated paper (OCC), the recycled waste corrugated paper can save wood for papermaking, and has the effects of protecting forest and maintaining ecological balance, and meanwhile, the three wastes generated in waste paper pulp production are much less than those generated in wood pulp production, so that the pollution amount is correspondingly reduced, so that the recycling and reutilization of waste paper are very important at home and abroad, the quality of the waste paper pulp is much better than that of grass fibers, and the waste paper pulp can be used for producing paper with high quality requirements, such as high-strength kraft liner board paper, high-grade bobbin base paper and the like.

The bobbin base paper has large ration, the layering phenomenon is easy to generate among layers during compounding, the use of the bobbin base paper is influenced, the interlayer bonding strength is technically required to be high, the ring crush strength is good, and meanwhile, a certain thickness is required to be kept. Most domestic manufacturers adopt spraying starch between layers to reduce the layering of paper sheets and improve the bonding strength and the ring crush strength between layers, but the thickness of the paper is reduced due to the increase of the starch amount and the tightness of the paper, the use amount of the paper under the unit weight is increased, and the use cost of users is increased.

Disclosure of Invention

Aiming at the technical problems, the invention overcomes the defects of the prior art and provides a method for improving the thickness of base paper of a bobbin, which comprises the following steps:

s1, adopting waste pagoda paper tubes and steel mill waste iron slag as main raw materials;

s2, the waste pagoda paper tubes are changed into small fragments by a paper shredder, water is added for dilution and stirring to form a pulp, impurities in the pulp are removed by a deslagging device, fibers are devillicate and broomed by a conical refiner and a double-disc refiner, the filamentous fibers are changed into flocculent fibers, and the flocculent fibers are stored in a No. 1 pulp storage tank;

s3, completely melting the waste iron slag raw material in a high-temperature melting furnace, blowing the waste iron slag raw material into filamentous fibers under the centrifugal force action of a high-speed centrifuge, cooling the filamentous fibers, adding an inorganic fiber modifier to enable the filamentous fibers to become flocculent fibers, and storing the flocculent fibers in a No. 2 slurry storage tank;

s4, accurately proportioning and uniformly mixing the two prepared fiber pulps according to a preset proportion requirement through an automatic proportion regulating valve, storing the mixture in a pulp proportioning pool, adding a small amount of non-ionic auxiliary agent and cationic starch, uniformly stirring and mixing the mixture, and sending the mixture to a pulp forming pool for later use;

and S5, diluting the prepared slurry, feeding the diluted slurry to a sheet making machine, stirring, standing, dehydrating and drying to obtain the bobbin base paper with a certain thickness.

The technical scheme of the invention is further defined as follows:

the method for increasing the thickness of the bobbin base paper comprises the step S3 of heating the high-temperature smelting furnace to 1500-1700 ℃.

The method for improving the thickness of the bobbin base paper comprises the step S3 of cooling to 50-80 ℃.

The method for increasing the thickness of the bobbin base paper comprises the step S4, wherein the prepared waste iron slag inorganic fiber and the waste pagoda paper tube organic fiber are respectively prepared according to the weight ratio of 10-20: 90-80 proportion.

The method for improving the thickness of the bobbin base paper comprises the step S4 of adding 0.2% of nonionic auxiliary agent and 0.5% -1.0% of cationic starch.

The method for improving the thickness of the bobbin base paper comprises the step S5 of diluting the sizing agent to 0.8% -1.0% of concentration.

The invention has the beneficial effects that:

(1) in the invention, the waste iron slag is centrifuged by a high-speed machine after being melted, and the inorganic fiber modifier is added to change the filamentous inorganic fiber into flocculent fiber, thereby improving the specific surface area of the inorganic fiber and increasing the softness and bonding strength of the inorganic fiber; the pulp after the waste pagoda paper tubes are disintegrated is changed into flocculent fibers through the action of a conical refiner and a double-disc refiner, so that the organic fibers are devillished and broomed, and the specific surface area and the bonding strength of the organic fibers are improved;

(2) in the invention, 0.2% of nonionic auxiliary agent and 0.5% -1.0% of cationic starch are added, so that the binding force between two fibers is improved, and the thickness index of the paper is obviously improved on the premise of ensuring that the ring crush strength and interlayer binding strength of the paper made by paper are not reduced;

(3) the sizing agent is diluted to the concentration of 0.8-1.0%, so that two fibers with different properties can be uniformly stirred and mixed, a flocculation phenomenon is not generated, layering of the bobbin base paper obtained by the two fibers due to different densities and different settling speeds is avoided, the bonding strength is reduced, and the quality of final paper is influenced.

Drawings

Fig. 1 is a process flow chart of the bobbin base paper of the invention.

Detailed Description

Example 1

The method for increasing the thickness of bobbin base paper provided by this embodiment, as shown in fig. 1, includes the following steps:

s1, adopting 90% of waste pagoda paper tubes and 10% of waste iron slag inorganic fiber cotton as main raw materials;

s2, the waste pagoda paper tubes are changed into small fragments by a paper shredder, the small fragments are diluted by water to the concentration of 5 percent, the disintegration time is 20min, the temperature is 46 ℃, the impurities in the small fragments are removed by a deslagging device, then the fibers are devillicate and broomed by a conical refiner and a double-disc refiner, the filiform fibers are changed into flocculent fibers, and the flocculent fibers are stored in a No. 1 pulp storage tank;

s3, heating the waste iron slag raw material in a high-temperature melting furnace to 1598 ℃ for complete melting, blowing the waste iron slag raw material into filamentous fibers through the centrifugal force of a high-speed centrifuge, cooling the filamentous fibers to 65 ℃, adding 0.1% of an inorganic fiber modifier to enable the filamentous fibers to become flocculent fibers, sending the flocculent fibers into a high-concentration hydrapulper for defibering, adding water to dilute the flocculent fibers to 5% of concentration, performing disintegration for 15min at the temperature of 45 ℃, separating fine iron slag balls which are not formed into cotton through a high-concentration slag separator, and storing the separated flocculent fiber cotton in a No. 2 pulp storage tank;

s4, accurately proportioning and uniformly mixing the prepared waste iron slag inorganic fiber and the waste pagoda paper tube organic fiber according to a proportion by an automatic proportion regulating valve, storing the mixture in a slurry proportioning pool, adding 0.2% of nonionic auxiliary agent and 0.6% of cationic starch, stirring and uniformly mixing, and sending the mixture to a slurry forming pool for later use;

and S5, diluting the prepared slurry to 1.0% concentration, sending the slurry to a sheet making machine for dehydration forming, squeezing and squeezing for dehydration, drying in a drying part, carrying out surface finishing treatment on a calender, and then carrying out procedures such as coiling, rewinding and packaging to obtain qualified bobbin base paper which is packaged and stored for sale.

Example 2

The method for increasing the thickness of the bobbin base paper provided by the embodiment is different from the method provided by the embodiment 1 in that 80% of waste pagoda paper tubes and 20% of waste iron slag inorganic fiber cotton are adopted as main raw materials.

Test product No. 1 and test product No. 2 were prepared according to the above method, tested by the key laboratory of pulping and papermaking in Jiangsu province, and compared with product No. 3 and national standard (GB/T26202-2010), the results are shown in Table 1:

TABLE 1 comparison table of quality indexes of paper tube base paper in different raw material ratios

Remarking: f refers to a waste corrugated case, F1 refers to a waste pagoda paper tube, and Fz refers to waste iron slag inorganic fiber cotton.

As can be seen from Table 1, the thickness of the No. 1 test product prepared from 90% of waste pagoda paper tubes (F) and 10% of waste iron slag inorganic fiber cotton (Fz) is 0.68mm, which is 13.3% higher than that of the No. 3 test product and is about 19.2% higher than that of the national standard superior product; the thickness of the No. 2 test product prepared from the waste pagoda paper tubes (F) accounting for 80 percent of the mixture ratio and the waste iron slag inorganic fiber cotton (Fz) accounting for 20 percent of the mixture ratio is 0.78mm, is improved by 30 percent compared with the thickness of the No. 3 product, and is improved by about 36.8 percent compared with the thickness of the national standard superior product.

In conclusion, the waste pagoda paper tubes are used as the main raw material, and proper waste iron slag inorganic fiber cotton is added, so that the thickness of the bobbin base paper can be well increased; however, the increase of the waste iron slag inorganic fiber cotton has a certain influence on the strength of paper, the strength of bobbin base paper can be improved by adding the starch, but the addition amount of the starch is increased, so that the production cost is increased, the thickness of the paper is reduced, gaps among fibers are mainly filled by adding the starch, the density and tightness of the paper are increased, and the bonding strength of the fibers is increased, so that the bonding strength of the paper is improved by reducing the use of the starch (0.5-1% of the starch) in the conventional method for producing the bobbin base paper, wherein the use amount of the starch is 1-2%, and then 0.2% of nonionic auxiliary agent is added, so that the production cost is saved. The selected non-ionic auxiliary agent contains anion and cation ions, changes according to the charge distribution condition of two different fibers, and firmly connects the two fibers together, so that the bonding force between the fibers is increased, but the thickness of the paper cannot be reduced.

In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope of the claims of the present invention.