CN106245420B8 - A kind of production method of toiler roll - Google Patents

Abstract

The invention belongs to daily chemical product technical field, and in particular to a kind of production method of toiler roll.The production method of toiler roll of the present invention, rely on existing paper technology and equipment, only by traditional pulp freeze the-processing repeatedly of ice-melt, realize the modification of paper pulp fiber property, the ductile strength between paper pulp fiber is further improved, while also improves the softness of paper pulp fiber.Modified paper pulp is that being substantially improved for coil paper performance can be achieved only with existing paper Processes and apparatus processed, further improves the softness and toughness of toiler roll, while its intensity and water absorbing properties have also been lifted.

Description

Method for producing sanitary roll paper

Technical field

[0001] The present invention belongs to the technical field of daily chemical products, and specifically relates to a production method of sanitary roll paper.

Background technique

[0002] Rolled paper is a widely used daily-use paper, which is widely used due to its advantages such as hygiene and convenience, and is favored by consumers. With the increasing demand for roll paper, the requirements for its quality and performance are getting higher and higher. In addition to requiring better antibacterial and hygienic properties of roll paper, higher requirements are also placed on its softness and toughness.

[0003] At present, there are many types of roll paper on the market, but due to the differences in manufacturing processes between manufacturers, the quality of the roll paper products produced varies, especially the flexibility and toughness of the roll paper are difficult to meet at the same time. Customer demand.

[0004] Chinese patent CN103696318A discloses a method for producing soft and fluffy facial tissues. The method uses sugarcane pulp and wood pulp with a high weight ratio of 65-75:25-35 as the main raw materials, adopts five sand removal processes, and By adjusting the different pulp concentrations before and after the equipment; supplemented by the flexible splitting and brooming beating process; the high-speed hot air penetrating the paper sheet process is used to produce soft, fluffy, strong, low-cost facial tissues that meet hygienic standards. The method utilizes the improvement of the existing paper-making process to further improve the softness and toughness of the facial tissue. However, the improvement of the process in this method can only be realized by the improvement of equipment, which limits the technical improvement of some small paper enterprises.

Summary of the invention

[0005] To this end, the technical problem to be solved by the present invention is to provide a method for producing sanitary roll paper to solve the problem that the sanitary roll paper cannot meet the requirements of flexibility and toughness in the prior art.

[0006] In order to solve the above-mentioned technical problems, the production method of sanitary roll paper according to the present invention includes the following steps:

[0007] (1) Pulp modification treatment: take the pulp prepared in a conventional manner, freeze it under low temperature conditions, then subject the frozen pulp to ice melting treatment, and circulate the pulp freezing and pulp ice melting treatments described above Steps to obtain modified pulp for use;

[0008] ⑵ Desanding: Five-pass desanding process is used to desand the pulp;

[0009] ⑶ Screening slurry: screening the prepared slurry to sift out undecomposed fibers in the vegetable liquid;

[0010] ⑷Grouting: spraying the slurry on the forming mesh to form a paper spoke;

[0011] Dehydration: dehydration treatment on spokes made of paper;

[0012] ⑹ Drying: the paper web is subjected to squeezing dehydration and hot air drying treatment;

[0013] ⑺ Peeling: Use a sharp knife with a blade angle of 75° to peel off the paper spokes;

[0014] ⑻ Rewinding: rewinding the stripped paper spoke to obtain the base paper;

[0015] ⑼Packaging: The obtained base paper is rewinded, slitted and packaged to obtain it.

[0016] In the step (1), the control temperature of the pulp freezing treatment step is -20~-25°C, and the control temperature of the pulp ice melting treatment step is 4~1°C.

[0017] In the step (1), the number of cycles of the pulp freezing and pulp ice melting treatment steps is 3-5 times.

[0018] In the step (1), the temperature difference between the freezing treatment step and the ice melting treatment step in each subsequent cycle is greater than the temperature difference between the freezing treatment step and the ice melting treatment step in the previous cycle.

[0019] In the step (1), the temperature of the freezing process in each subsequent cycle is lower than the temperature of the freezing process in the previous cycle, and the temperature of the ice melting process in each subsequent cycle is higher than that of the previous cycle. The temperature of the ice treatment.

[0020] In the step (1), it also includes a step of adding mannitol to the pulp before the freezing treatment step. [0021] The mannitol is added in an amount of 5-10 wt% of the pulp mass.

[0022] The pulp is sucrose syrup and/or wood pulp.

[0023] In the step (2), the de-sanding step specifically includes: A. A large-hole gauze is installed in front of the washing box to remove coarse sand; B. A de-sanding machine is installed before refining to remove medium-sand C. Set a middle-hole gauze after refining; D. Set a grit plate before entering the headbox; E. Set a small-hole gauze under the headbox of the paper machine to remove fine sand.

[0024] The present invention also discloses the toilet roll produced by the method.

[0025] The production method of the sanitary roll paper of the present invention relies on the existing papermaking technology and equipment, and only through repeated freezing-melting of conventional pulp, the modification of the pulp fiber properties is realized, and the pulp is further improved. The bremsstrahlung strength between the fibers also improves the softness of the pulp fibers. The modified pulp only uses the existing papermaking technology and equipment to achieve a substantial improvement in the performance of the roll paper, further improving the softness and toughness of the toilet roll, and its strength and water absorption properties are also improved.

[0026] The production method of the sanitary roll paper of the present invention, by controlling the increase in the temperature difference between the freezing step and the ice melting step in each cycle, the softness and toughness of the roll paper are further improved, and its strength and water absorption properties are also further improved. promote.

[0027] In addition, the production method of the present invention further improves the performance of the roll paper by adding mannitol as a co-modifier.

Specific implementing manner[0028] embodiment 1

[0029] The production method of the sanitary roll paper of this embodiment includes the following steps:

[0030] (1) Pulp modification treatment: take the sucrose syrup prepared in a conventional manner, freeze it at -20° C. until it freezes completely, and then put the frozen pulp at 1° C. Melt the ice until the ice is completely melted, and cycle the pulp freezing and pulp ice melting treatment steps 3 times according to the temperature conditions of the freezing and melting steps to obtain the modified pulp for use;

[0031] (2) Desanding: using five de-sanding processes, specifically: A. Set a large-hole gauze in front of the washing box to remove coarse sand; B. Install a de-sanding machine before refining to remove medium-sand C. Set up a middle hole gauze after refining; D. Set up a grit plate before entering the headbox; E. Set up a small hole gauze under the headbox of the paper machine to remove fine sand;

[0032] (3) Screening: sieving the slurry to remove undecomposed lumps or large-size fibers in the slurry;

[0033] ⑷ shotcrete: the slurry is sprayed on the forming mesh to form paper spokes, and the ratio of the shotcrete speed to the forming mesh speed is controlled at 0.925-0.945;

[0034] (5) Dehydration: dehydration of the paper spoke, so that the dryness of the paper spoke is 8%;

[0035] (6) Drying: the paper web is subjected to press dehydration and hot air drying treatment (100-15 (rc), until the dryness of the paper web is 96%;

[0036] ⑺ Peeling: Use a knife with a 75° blade angle to peel off the paper spokes;

[0037] ⑻ Rewinding: rewinding the stripped paper spoke to obtain the base paper;

[0038] ⑼Packaging: the raw paper is rewinded, slitted and packaged to obtain super-brittle paper.

Example 2

[0040] The production method of the sanitary roll paper of this embodiment is the same as that of Example 1, the difference is only that the pulp modification treatment steps in the step d) are different, specifically: take wood pulp prepared in a conventional manner , Perform freezing treatment at -25°c until it freezes completely, and then put the frozen pulp at 4°C. (: Perform ice melting treatment under conditions until the ice is completely melted, and according to the temperature conditions of the freezing and melting steps, cycle the pulp freezing and pulp ice melting treatment steps 5 times to obtain the modified pulp for use.

Example 3

[0042] The production method of the sanitary roll paper of this embodiment is the same as that of Example 1, the difference is only that the pulp modification treatment steps in the step (1) are different, specifically: taking sucrose prepared in a conventional manner Pulp and wood pulp (mass ratio of 1:1), freeze treatment at -2 (TC to complete freezing, and then freeze the frozen pulp at 41: conditions for melting until the ice is completely melted; Then the pulp is frozen again at -22-C until it is completely frozen, and then the frozen pulp is melted at 4°C until the ice is completely melted; then again at -25. (: Under the conditions, the pulp is frozen until it is completely frozen, and then the frozen pulp is melted at 4°C until the ice is completely melted, and the modified pulp is obtained for use.

Example 4

[0044] The production method of the sanitary roll paper of this embodiment is the same as that of Example 1, the difference is only that the pulp modification treatment steps in the step (1) are different, specifically: taking sucrose prepared in a conventional manner Pulp and wood pulp (mass ratio is 丨: U, freeze treatment at -20°C until it freezes completely, and then freeze the pulp after freezing treatment at 1° rc until the ice is completely melted ; Then the pulp is frozen again at -22-C until it is completely frozen, and then the frozen pulp is melted at 10°C until the ice is completely melted; then again at _25»c Under the conditions, the pulp is frozen until it is completely frozen, and then the frozen pulp is melted under KTC conditions until the ice is completely melted, and the modified pulp is obtained for use.

Example 5

[0046] The production method of the sanitary roll paper of this embodiment is the same as that of Example 1, the difference is only that the pulp modification treatment steps in the step (1) are different, specifically: taking sucrose prepared in a conventional manner Pulp and wood pulp (mass ratio of 1:1), freeze treatment at -20°C until it freezes completely, and then melt the frozen pulp under conditions until it freezes completely. Melt; then the pulp is frozen again at -2°C until it is completely frozen, and then the frozen pulp is melted at 7°C until the ice is completely melted; then again at -2 (Under rc conditions, the pulp is frozen until it is completely frozen, and then the frozen pulp is melted at 10°C: under conditions that the ice is completely melted, the modified pulp is obtained for use.

Example 6

[0048] The production method of the sanitary roll paper of this embodiment is the same as that of the embodiment 1, the difference is only that the pulp modification treatment step in the step (1) is different, specifically: it is made in a conventional manner The sucrose syrup and wood pulp (mass ratio 丨: D, frozen at -25 ° c conditions to completely freeze, and then the frozen pulp is melted under 41 conditions until the ice is completely melted; Then the pulp is frozen again at -25-C until it is completely frozen, and then the frozen pulp is melted at 7°C until the ice is completely melted; then again at -2frc The pulp is subjected to freezing treatment until it is completely frozen, and then the frozen pulp is subjected to a melting treatment under the condition of 10.0° until the freezing is completely melted, and the modified pulp is obtained for use.

Example 7

[0050] The production method of the sanitary roll paper of this embodiment is the same as that of the embodiment 1, the difference is only that the pulp modification treatment step in the step (1) is different, specifically: it is made in a conventional manner Sucrose syrup and wood pulp (mass ratio 丨:D, freeze treatment at -20°C to complete icing, and then freeze-processed pulp at 41: condition to melt ice until the ice is completely melted ; Then again at -22. (: freeze the pulp under the conditions until it is completely frozen, then the frozen pulp is melted at 7°C until the ice is completely melted; then again at -25〇 Under the condition c, the paper pulp is frozen until it freezes, and then the frozen paper is melted under 10 conditions until the ice is completely melted, and the modified pulp is obtained for use.

Example 8

[0052] The production method of the sanitary roll paper of this embodiment is the same as that of Example 7, except that the step (1) also includes the step of adding mannitol to the pulp before the freezing treatment step The added amount of the mannitol is 5wt% of the mass of the pulp.

Embodiment 8

[0054] The production method of the sanitary roll paper of this embodiment is the same as that of Example 7, except that the step (D also includes the step of adding mannitol to the pulp before the freezing treatment step, The added amount of the mannitol is 10 wt% of the mass of the pulp.

[0055] Comparative Example 1

[0056] The production method of the sanitary roll paper in this embodiment is the same as that in Example 1, except that the pulp obtained in the step (1) is directly used for subsequent roll paper production without freezing-thawing. Ice modification treatment.

[0057] Comparative Example 2

[0058] In accordance with the method disclosed in Example 1 of Chinese Patent CN10369631SA, the production and preparation of the roll paper was carried out. [0059] The softness and toughness of the toilet rolls prepared in the foregoing Examples 1-9 and Comparative Examples 1-2 were tested, and the test results are recorded in Table 1 below.

[0060] Table 1 Performance Test Results of Sanitary Roll Paper

[0061] _Soft Miyuyu#::_Ning% Tensile strength belongs to Zhong Yiqiangqing mf Water absorption _ Hidden lateral:: mm 撗向; _ Direction:: Mode to machine _ Mode to inmyl00s. Miscellaneous. 281 23: 6 403 1842® 6078 M31 20/1 layer Example 2. 67? Wm: 2_:.. 4. 184 Xing 6129 5519. Oblique 39:.: Gang:" Repeat: Shi Lian. 観270: 25:? 7 4.3:8 .: l: 93'2r, 6305:: 59W 14:» 1 coagulation 1::'recommendation __. 4: coffee: scales: 2S, 9i: 4.41: 1 舛_: 5988. 1 pin Example 5 652 269: 26J 4:.:継.133:3:5 Iron 2:8:::: 5:8¾ 1492 19/1 H Example 6: Gin W: 26:, 3 4m: 1: _37 卜铁_:::: 5:?96 ：150| Name: 1. Layer Example 7 602 .Fiber 2 '29,4:. 4.7| 21034: Afterburning: 6504 1551 Record _1 Layer Example 8 583 S19:3:1J f95:: 22_1: Bu Teng:丨:69 Jun 16 Satoshi WiM: Example 9: Miscellaneous 2|6:. |1J 4 J9 22068 6989 b986 IS09 Wt\M Comparative Example 1: 318: 9: .42 3>:02i: 12389 4213 mm to delete the 2W1 layer. :Comparative example 2 | 7:Sf 3_ |9,4 3J:6: 5619

[0062] It can be seen from the data in the above table that the production method of the toilet paper of the present invention, through the repeated freezing-melting of the pulp, realizes the modification of the properties of the pulp fibers, and further improves the tenacity and strength between the pulp fibers. , It also improves the softness of the pulp fiber. The modified pulp only uses the existing papermaking technology and equipment to achieve a substantial improvement in the performance of the roll paper, further improving the softness and toughness of the toilet roll paper, and its strength and water absorption properties are also improved. [0063] In addition, the production method of the present invention further improves the performance of the roll paper by adding mannitol as a co-modifier.

[0064] Obviously, the above-mentioned embodiments are merely examples for clear description, and are not intended to limit the implementation. For those of ordinary skill in the art, other changes or modifications in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the protection scope created by the present invention.

Claims (7)

1. A method for producing sanitary roll paper, characterized in that it comprises the following steps: (1) Pulp modification treatment: take the pulp prepared in a conventional way, freeze it at -20~-25°C, and then The frozen pulp is subjected to ice melting treatment at 4~10°C, and the above steps of pulp freezing and pulp ice melting treatment are circulated 3-5 times to obtain modified pulp for use; (2) Desanding: adopt Five sand removal processes are used to remove sand from the pulp; (3) Screening: Screening the prepared slurry to remove undecomposed fibers in the slurry; (4) Shotcreting: spraying the slurry on the forming wire Paper spokes are formed on the cloth; (5) Dewatering: dehydrating the spokes made of paper; (6) Drying: Pressing and dehydrating the paper spokes and drying with hot air; (7) Peeling: using a knife with a 75° blade angle Peel the paper spokes; (8) Rewinding: rewind the peeled paper spokes to obtain the base paper; (9) Packaging: rewind, slit and package the resulting base paper to obtain; the steps ( In 1), the temperature difference between the freezing treatment step and the ice melting treatment step in each subsequent cycle is greater than the temperature difference between the freezing treatment step and the ice melting treatment step in the previous cycle. 2. The method for producing sanitary roll paper according to claim 1, characterized in that, in the step (1), the temperature of the freezing treatment in each subsequent cycle is lower than the temperature of the freezing treatment step in the previous cycle, and each The temperature of the ice melting treatment in the latter cycle is higher than the temperature of the ice melting treatment in the previous cycle. 3. The method for producing sanitary roll paper according to any one of claims 1-2, characterized in that, in the step (1), further comprising adding mannitol to the pulp before the freezing treatment step step. 4. The method for producing sanitary roll paper according to claim 3, characterized in that the addition amount of the mannitol is 5-10 wt% of the mass of the pulp. 5. The method for producing sanitary roll paper according to any one of claims 1-2, wherein the pulp is wood pulp. 6. The method for producing sanitary roll paper according to any one of claims 1-2, characterized in that, in the step (2), the sand removal step specifically includes: A, setting a line in front of the pulp box Large-hole gauze to remove coarse sand; B. Install a de-sanding machine before refining to remove medium sand; C. Set a middle-hole gauze after refining; D. Set up a grit plate before entering the size box; E. A small hole gauze is installed at the lower part of the headbox of the paper machine to remove fine sand. 7. A toilet roll produced by the method of any one of claims 1-6.