Soft antibacterial napkin production process based on compounding of bamboo pulp and cotton pulp

Abstract

The invention discloses a soft antibacterial napkin production process based on bamboo pulp and cotton pulp compounding, and relates to the field of napkin production, the soft antibacterial napkin production process comprises the following steps: S1, mixing bleached bamboo pulp and bleached cotton pulp according to a mass ratio of (30-70): (70-30), performing defibering treatment by adopting a vertical hydrapulper, and controlling the defibering concentration at 3-6%; s2, performing pulping treatment on the defibered pulp by adopting a double-disc pulping machine, controlling the pulping gap to be 0.1 mm to 0.3 mm, and controlling the pulping current to be 100A to 200A; by optimizing the composite proportion of the bamboo pulp and the cotton pulp, the softness and the mechanical strength of the napkin reach ideal balance; bamboo pulp fibers are high in rigidity and provide excellent tensile property and wet strength, cotton pulp fibers are thin, long and soft, and the touch feeling of the paper is remarkably improved. According to the embodiment 2, the ratio of 50: 50 is adopted, the strength advantage of the bamboo pulp is reserved, the rigidity defect of the bamboo pulp is overcome through the cotton pulp, the softness 45.2 mN of the final finished product is close to the level of pure cotton pulp, meanwhile, the tensile strength 1.8 kN / m is superior to that of the pure cotton pulp, and synergistic improvement of performance is achieved.

Description

TECHNICAL FIELD

[0001] The application relates to a production technology of napkin paper, in particular to a production process of soft and bacteriostatic napkin paper based on composite of bamboo pulp and cotton pulp. BACKGROUND

[0002] As a daily hygiene product, the performance requirements of napkin paper mainly include softness, water absorption, mechanical strength and hygiene safety. Traditional napkin paper mainly uses wood pulp or straw pulp as the main raw material, but the cost of wood pulp is high and it excessively depends on forest resources; the straw pulp fiber is short, the paper strength is low and the touch is rough. In recent years, bamboo pulp has gradually become a substitute raw material for napkin paper production because the fiber length is between wood pulp and straw pulp and it has natural bacteriostatic property. However, the pure bamboo pulp fiber is relatively strong in rigidity, which leads to a hard paper hand feeling and is difficult to meet the demand of softness in the high-end market. In addition, the cotton pulp fiber is long and soft, which can significantly improve the paper touch, but the pure cotton pulp has high cost and low wet strength, which affects the use durability.

[0003] At present, some enterprises try to use bamboo pulp and cotton pulp in combination to balance the cost and performance. However, the existing technology has the following defects: the pulp ratio and beating process are not optimized, which leads to insufficient fiber combination, insufficient paper strength and unstable bacteriostatic effect. For example, some processes use simple mechanical mixing without considering the influence of beating degree on fiber combination, which makes the paper easy to delaminate or powder; although some processes add bacteriostatic agents, the natural bacteriostatic property of bamboo pulp is not combined, which leads to excessive use of bacteriostatic agents or uneven distribution, affecting the product safety and economy.

[0004] Therefore, it is urgent to develop a bamboo pulp / cotton pulp composite napkin paper production process which balances softness, strength and bacteriostatic performance to solve the problems of the existing technology. SUMMARY

[0005] The purpose of the application is to provide a production process of soft and bacteriostatic napkin paper based on composite of bamboo pulp and cotton pulp to solve the problems of low fiber combination strength, unstable bacteriostatic effect and insufficient softness of the finished product caused by unreasonable pulp ratio and imperfect beating process in the prior art.

[0006] In order to achieve the above purpose, the application provides the following technical scheme: a production process of soft and bacteriostatic napkin paper based on composite of bamboo pulp and cotton pulp, comprising the following steps:

[0007] S1, mixing bleached bamboo pulp and bleached cotton pulp according to the mass ratio of 30-70:70-30, and performing defibration treatment by using a vertical hydraulic pulper, and the defibration concentration is controlled at 3%-6%;

[0008] S2, the pulp after the defibration is beaten by a double-disc refiner, the beating gap is controlled at 0.1mm-0.3mm, the beating current is 100A-200A, the pulp consistency is controlled at 35°SR-65°SR, and the wet weight is measured according to GB / T5399 standard as 1.0g-3.0g;

[0009] S3, the pulp is transferred to a stirring tank for stirring, and dry strength agent 5-15kg / ton of paper, wet strength agent 5-15kg / ton of paper, softener 3-8kg / ton of paper, bacteriostatic agent 0.5-2kg / ton of paper and filler 20-60kg / ton of paper are sequentially added into the stirring tank;

[0010] S4, the treated pulp is formed by wire forming on a 60-100 mesh polyester wire, and the wire forming consistency is controlled at 0.2%-0.7%;

[0011] S5, the formed paper sheet is dried by a two-stage drying cylinder, the first stage drying cylinder temperature is 110℃-130℃, and the second stage drying cylinder temperature is 90℃-110℃;

[0012] S6, the dried paper sheet is sequentially subjected to calendering treatment, moisturizing treatment and sterilization packaging, the calendering line pressure is 40-80kN / m, and the calendering temperature is 80℃-120℃.

[0013] Further, in S3, the dry strength agent is a cationic or amphoteric polysaccharide dry strength agent, which is added twice, 60%-70% of the total amount is added before beating, and the remaining 30%-40% is added before wire forming.

[0014] Further, in S3, the wet strength agent is a polyamide epichlorohydrin resin, which is diluted to a concentration of 0.5%-1.5% before adding, and stirred for 10-20 minutes.

[0015] Further, in S3, the softener is an amino-modified silicone microemulsion, with a pH value of 6-8 and a solid content of 20%-30%.

[0016] Further, in S3, the bacteriostatic agent is selected from nano-silver or chitosan, wherein the nano-silver particle size is 10nm-50nm, and the chitosan deacetylation degree is ≥85%.

[0017] Further, in S3, the filler is calcium carbonate with a fineness of ≥800 mesh.

[0018] Further, in S3, the pulp is continuously stirred at a stirring speed of 100-200rpm, and the dry strength agent, wet strength agent, softener, bacteriostatic agent and filler are added with an interval of 2-5 minutes.

[0019] Further, in S5, the drying process adopts a heat conduction oil heating system with a temperature control precision of ±2℃.

[0020] Further, in S6, the moisturizing treatment uses glycerol or sorbitol as a moisturizing agent, and the addition amount is 0.5%-2% of the mass of the paper sheet, and a high-pressure spraying system is used for atomization, and the atomized particle size is 20-50 mu m.

[0021] Further, in S6, the disinfection packaging uses ultraviolet disinfection, and the disinfection time is 5-10 seconds.

[0022] Compared with the prior art, the production process of the soft and bacteriostatic napkin paper based on the bamboo pulp and cotton pulp composite provided by the application optimizes the composite ratio of the bamboo pulp and the cotton pulp, so that the softness and mechanical strength of the napkin paper reach an ideal balance; the bamboo pulp fiber has strong rigidity, provides excellent tensile performance and wet strength, and the cotton pulp fiber is long and soft, which significantly improves the paper touch. In the embodiment 2, the ratio of 50:50 is adopted, the strength advantage of the bamboo pulp is retained, and the rigidity defect of the bamboo pulp is compensated by the cotton pulp, so that the softness of the final product is close to the pure cotton pulp level, the tensile strength is 1.8 kN / m, which is better than that of the pure cotton pulp, and the performance is synergistically improved.

[0023] By introducing the segmented beating process and the precise addition of functional additives, the bacteriostatic property and durability of the paper are significantly enhanced. The beating degree is controlled at 50°SR to ensure that the fibers are fully separated and flocked, and the wet strength agent (polyamide epoxy chloropropane resin) is uniformly dispersed to improve the wet strength to 0.6 kN / m, which meets the daily use requirements. The addition of the bacteriostatic agent chitosan (degree of deacetylation ≥85%) makes the bacteriostatic rate reach 99.5%, effectively inhibiting the growth of microorganisms.

[0024] Through the fine post-processing process, the finished product has both comfort and hygiene safety. Two-stage drying (120℃ / 100℃) avoids damage to the fibers caused by high temperature, and calendering treatment (100℃, 60 kN / m) improves the surface smoothness of the paper. The synergistic application of glycerol spraying moisturizing (1.25%) and ultraviolet disinfection (7.5 seconds) not only prevents the paper from drying and becoming brittle, but also ensures that the final product meets the hygiene standards in terms of microbial indicators, and improves the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments described in the present application, and other drawings can also be obtained by those skilled in the art based on these drawings.

[0026] Figure 1 The method flowchart provided by the embodiments of the present application. DETAILED DESCRIPTION

[0027] In order to make the technical personnel in the art better understand the technical solutions of the present application, the present application will be further described in detail below in conjunction with the drawings.

[0028] As shown in the accompanying Figure 1

[0029] Example 1:

[0030] S1, S1, raw material ratio and defibration:

[0031] Take 30 kg of bleached bamboo pulp and 70 kg of bleached cotton pulp and mix them, total pulp 100 kg.

[0032] In a vertical hydraulic pulper, treat at a defibration concentration of 3% for 20 minutes, speed 800 rpm.

[0033] S2, beating treatment:

[0034] Use a double-disc beater, gap adjusted to 0.1 mm, current 100 A, beat to a pulp consistency of 35°SR, wet weight 1.0 g (GB / T5399).

[0035] S3, addition of auxiliary materials:

[0036] Transfer to a stirring tank (100 rpm) and add in order:

[0037] Dry strength agent (cationic starch): add in two batches, first 3.5 kg (70% of total 5 kg), remaining 1.5 kg added before webbing.

[0038] Wet strength agent (0.5% diluted polyamide epoxy chloropropane): add 5 kg after stirring for 10 minutes.

[0039] Softener (amino silicone oil microemulsion, pH 6): add 3 kg.

[0040] Bacteriostatic agent (10 nm silver nanoparticles): add 0.5 kg.

[0041] Filler (800 mesh calcium carbonate): add 20 kg, interval 2 minutes.

[0042] S4 and S5, forming and drying:

[0043] Form through a 60 mesh polyester screen, webbing consistency 0.2%.

[0044] Two-stage oven drying: first stage 110°C, second stage 90°C (heat conduction oil temperature control ±2°C).

[0045] S6, post-treatment:

[0046] Calendering: pressure 40 kN / m, temperature 80°C.

[0047] ​Moisture retention: Spray 0.5% glycerol (atomized particle size 20 μm).

[0048] Packaging: UV disinfection for 5 seconds.

[0049] Example 2:

[0050] S1, S1, raw material ratio and defibration:

[0051] Take 50 kg of bleached bamboo pulp and 50 kg of bleached cotton pulp and mix them, for a total of 100 kg of pulp.

[0052] In a vertical hydraulic pulper, treat at a defibration concentration of 4.5% for 25 minutes at a speed of 1000 rpm.

[0053] Double-disc refiner gap 0.2 mm, current 150 A, to a pulp consistency of 50° SR, wet weight 2.0 g.

[0054] In a mixing tank (150 rpm), add in order:

[0055] Dry strength agent: first 7 kg (70% of the total amount of 10 kg), and the remaining 3 kg is added before the web is formed. Wet strength agent (1% dilution): add 10 kg after 15 minutes of stirring.

[0056] Softener (amino silicone oil, pH 7, solid content 25%): add 5.5 kg.

[0057] Bacteriostatic agent (85% deacetylated chitosan): add 1.25 kg.

[0058] Filler (calcium carbonate): add 40 kg at intervals of 3.5 minutes.

[0059] S4 and S5, forming and drying:

[0060] Form 80-mesh polyester web at a web consistency of 0.45%.

[0061] Cylinder dryer: first stage 120°C, second stage 100°C.

[0062] S6, post-treatment:

[0063] Calendering: pressure 60 kN / m, temperature 100°C.

[0064] Moisture retention: Spray 1.25% sorbitol (atomized particle size 35 μm).

[0065] Packaging: UV disinfection for 7.5 seconds.

[0066] Example 3:

[0067] S1, S1, raw material ratio and defibration:

[0068] Take bleached bamboo pulp 70 kg and bleached cotton pulp 30 kg mixed, total pulp 100 kg.

[0069] In the vertical hydraulic pulper, 6% defibration concentration was treated for 30 minutes, speed 1200 rpm.

[0070] S2, beating treatment:

[0071] Double-disc refiner gap 0.3 mm, current 200 A, beating to 65°SR, wet weight 3.0 g.

[0072] Stirring pool (200 rpm) was added in turn:

[0073] Dry strength agent: first 10.5 kg (70% of the total amount of 15 kg), the remaining 4.5 kg added before the net. Wet strength agent (1.5% dilution): added 15 kg after stirring for 20 minutes.

[0074] Softener (amino silicone oil, pH 8, solid content 30%): add 8 kg.

[0075] Bacteriostatic agent (50 nm nano-silver): add 2 kg.

[0076] Filler (calcium carbonate): add 60 kg, interval 5 minutes.

[0077] S4 and S5, forming and drying:

[0078] 100 mesh polyester net forming, net concentration 0.7%.

[0079] Cylinder drying: first stage 130℃, second stage 110℃.

[0080] S6, post-treatment:

[0081] Calendering: pressure 80 kN / m, temperature 120℃.

[0082] Moisturizing: spray 2% glycerol (atomized particle size 50 μm).

[0083] Packaging: ultraviolet disinfection 10 seconds.

[0084] Example 4:

[0085] S1, raw material ratio and defibration:

[0086] Take bleached bamboo pulp 60 kg and bleached cotton pulp 40 kg mixed, total pulp 100 kg.

[0087] In the vertical hydraulic pulper, 5% defibration concentration was treated for 28 minutes, speed 1100 rpm.

[0088] S2, beating treatment:

[0089] A twin disc refiner was used with a gap setting of 0.25mm, current 180A, to pulp to a freeness of 55°SR, wet pick-up 2.5g (GB / T 5399).

[0090] S3, Additives:

[0091] Into the mixing chest (180rpm), add in order:

[0092] Dry strength agent (amphoteric starch): add in two portions, first 8.4kg (70% of total 12kg), remaining 3.6kg added at reel.

[0093] Wet strength agent (1.2% dilution of polyamide epichlorohydrin): add 12kg after 18 minutes mixing.

[0094] Softener (amino silicone oil microemulsion, pH 7.5, solid content 28%): add 6kg.

[0095] Bacteriostatic agent (30nm silver nanoparticles): add 1.8kg.

[0096] Filler (1000 mesh calcium carbonate): add 50kg in 4 minute intervals.

[0097] S4 and S5, Forming and drying:

[0098] Form by 90 mesh polyester net, reel concentration 0.6%.

[0099] Two stage dryer: first stage 125°C, second stage 105°C (temperature controlled by conduction oil, ±2°C).

[0100] S6, Post treatment:

[0101] Calendering: pressure 70kN / m, temperature 110°C.

[0102] Moisture retention: spray 1.8% sorbitol (atomized particle size 40μm).

[0103] Packaging: UV sterilization 9 seconds.

[0104] Example 5:

[0105] S1, Raw material ratio and defibration:

[0106] Mix 40kg of bleached bamboo pulp with 60kg of bleached cotton pulp, total pulp 100kg.

[0107] Defibrate in a vertical hydraulic pulper at 4% concentration for 22 minutes, speed 950rpm.

[0108] S2, Refining:

[0109] Using a twin-disc refiner, the gap was adjusted to 0.15 mm, the current was 130 A, and the pulp was beaten to a consistency of 45° SR and a wet weight of 1.8 g.

[0110] S3, Additives:

[0111] The stirring tank (130 rpm) was entered in order to add:

[0112] Dry strength agent (cationic starch): added in two times, the first 5.6 kg (70% of the total amount of 8 kg), and the remaining 2.4 kg was added before the web.

[0113] Wet strength agent (0.8% dilution of polyamide epoxy chloropropane): added 8 kg after stirring for 12 minutes.

[0114] Softener (amino silicone oil microemulsion, pH 6.5, solid content 22%): added 4 kg.

[0115] Bacteriostatic agent (90% deacetylation chitosan): added 1 kg.

[0116] Filler (900 mesh calcium carbonate): added 30 kg at intervals of 3 minutes.

[0117] S4 and S5, forming and drying:

[0118] Formed by a 70-mesh polyester net, the web concentration was 0.3%.

[0119] Two-stage drying oven: first stage 115°C, second stage 95°C.

[0120] S6, post-treatment:

[0121] Calendering: pressure 50 kN / m, temperature 90°C.

[0122] Moisturizing: spray 0.8% glycerol (atomized particle size 25 μm).

[0123] Packaging: ultraviolet disinfection for 6 seconds.

[0124] Example 6:

[0125] S1, raw material ratio and defibration:

[0126] Bleached bamboo pulp 70 kg and bleached cotton pulp 30 kg were mixed, and the total pulp was 100 kg.

[0127] In a vertical hydraulic pulper, the defibration concentration was 5.5% for 30 minutes at a speed of 1150 rpm.

[0128] S2, beating treatment:

[0129] Using a twin-disc refiner, the gap was adjusted to 0.28 mm, the current was 190 A, and the pulp was beaten to a consistency of 60° SR and a wet weight of 2.8 g.

[0130] S3, Additives:

[0131] Into the mixing chest (190 rpm), add in order:

[0132] Dry strength agent (cationic starch): add in two times, first 9.1 kg (70% of total 13 kg), the rest 3.9 kg before web formation.

[0133] Wet strength agent (1.3% dilution of polyamide epichlorohydrin): add 13 kg after 19 minutes of stirring.

[0134] Softener (amino silicone oil microemulsion, pH 7.8, solid content 29%): add 7 kg.

[0135] Bacteriostatic agent (40 nm nano-silver): add 1.5 kg.

[0136] Filler (1200 mesh calcium carbonate): add 55 kg, interval 4.5 minutes.

[0137] S4 and S5, forming and drying:

[0138] Forming through 95 mesh polyester net, web concentration 0.65%.

[0139] Two-stage drying oven: first stage 128°C, second stage 108°C.

[0140] S6, post-treatment:

[0141] Calendering: pressure 75 kN / m, temperature 115°C.

[0142] Moisturizing: spray 1.5% sorbitol (atomized particle size 45 μm).

[0143] Packaging: ultraviolet disinfection 8 seconds.

[0144] Experimental Example: Bamboo pulp / cotton pulp composite napkin paper process optimization and performance comparison

[0145] Experimental purpose: to investigate the influence of different pulp ratio, beating process and additive amount on the softness, bacteriostatic property and strength of napkin paper.

[0146] 1. Experimental design:

[0147] Reference group (Example 2): bamboo pulp / cotton pulp = 50:50, beating degree 50°SR, wet strength agent 10 kg, bacteriostatic agent 1.25 kg (chitosan).

[0148] Comparative Example 1: only bamboo pulp (100% bamboo pulp), other parameters same as Example 2, to investigate the influence of pure bamboo pulp on softness.

[0149] Comparative Example 2: Cotton pulp only (100% cotton pulp), other parameters same as Example 2, to investigate the effect of pure cotton pulp on strength.

[0150] Comparative Example 3: Beating degree 35°SR (low beating), other same as Example 2, to investigate the effect of beating degree on fiber bonding.

[0151] Comparative Example 4: No bacteriostat added, other same as Example 2, to verify the necessity of bacteriostat.

[0152] 2. Experimental method:

[0153] Detection index:

[0154] Softness (GB / T8942, unit mN, the smaller the value, the softer)

[0155] Bacteriostasis rate (GB / T20944.3, Staphylococcus aureus & Escherichia coli, 24h culture)

[0156] Tensile strength (GB / T12914, unit kN / m)

[0157] Wet strength (GB / T465.2, test after 10min immersion)

[0158] 3. Experimental data record table:

[0159]

[0160] 4. Experimental result analysis:

[0161] Softness:

[0162] Comparative Example 2 (pure cotton pulp) is the best (38.5mN), because cotton fibers are longer and softer.

[0163] Comparative Example 1 (pure bamboo pulp) is the worst (58.7mN), because bamboo fibers are more rigid.

[0164] Example 2 (50:50) has better balance (45.2mN).

[0165] Bacteriostasis:

[0166] Comparative Example 4 (no bacteriostat) has a bacteriostasis rate of only 65.2%, which is significantly lower than other groups (≥98.9%), proving the key role of chitosan bacteriostat.

[0167] Bamboo pulp (Comparative Example 1) has slightly better natural bacteriostasis than cotton pulp (Comparative Example 2), but the difference is not significant.

[0168] Strength performance:

[0169] Tensile strength: Comparative Example 1 (pure bamboo pulp) is the highest (2.1 kN / m), with strong fiber binding force; Comparative Example 3 (low beating degree) is the worst (1.3 kN / m), with insufficient fiber fanning.

[0170] Wet strength: Example 2 (0.6 kN / m) is better than Comparative Example 3 (0.3 kN / m), because the wet strength agent is more effectively dispersed after sufficient beating.

[0171] 5. Conclusion:

[0172] Optimal comprehensive performance: Example 2 (bamboo pulp / cotton pulp = 50:50), with softness, antibacterial property and strength.

[0173] Key influencing factors:

[0174] Cotton pulp ratio improves softness but reduces strength; bamboo pulp ratio improves strength but reduces softness.

[0175] Antibacterial agent cannot be omitted, otherwise the antibacterial rate will drop sharply.

[0176] Beating degree needs to be ≥ 50°SR, otherwise the fiber binding force is insufficient and the strength decreases.

[0177] The above only describes certain exemplary embodiments of the present application in a descriptive manner, and it is needless to say that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application for those skilled in the art. Therefore, the above figures and description are illustrative in nature and should not be understood as limiting the scope of protection of the claims of the present application.

Claims

1. A production process of soft antibacterial napkin paper based on composite of bamboo pulp and cotton pulp, Comprising, characterized in that Comprising the following steps: S1, mixing bleached bamboo pulp and bleached cotton pulp according to mass ratio 30-70:70-30, and adopting vertical hydraulic pulper to perform defibration treatment, and controlling defibration consistency at 3%-6%; S2, adopting double-disc refiner to perform beating treatment on the defibrated pulp, controlling refiner gap at 0.1mm-0.3mm, controlling refiner current at 100A-200A, controlling pulp consistency at 35°SR-65°SR, and controlling wet weight according to GB / T5399 standard at 1.0g-3.0g; S3, transferring the pulp to a stirring tank for stirring, and adding dry strength agent 5-15kg / ton of paper, wet strength agent 5-15kg / ton of paper, softening agent 3-8kg / ton of paper, bacteriostatic agent 0.5-2kg / ton of paper and filler 20-60kg / ton of paper into the stirring tank in sequence; S4, forming the treated pulp into paper sheet through 60-100 mesh polyester forming wire, and controlling wire consistency at 0.2%-0.7%; S5, adopting two-stage drying cylinder to dry the formed paper sheet, and controlling first-stage drying cylinder temperature at 110°C-130°C and second-stage drying cylinder temperature at 90°C-110°C; S6, performing calendering treatment, moisturizing treatment and sterilization packaging on the dried paper sheet in sequence, and controlling calendering line pressure at 40-80kN / m and calendering temperature at 80°C-120°C.

2. The process for producing soft and antibacterial napkin paper based on bamboo pulp and cotton pulp composite as claimed in claim 1, wherein, In S3, the dry strength agent is cationic or amphoteric polysaccharide dry strength agent, and is added twice, 60%-70% of the total amount is added before beating, and the remaining 30%-40% is added before wire forming.

3. The process for producing soft and antibacterial napkin paper based on bamboo pulp and cotton pulp composite as claimed in claim 1, wherein, In S3, the wet strength agent is polyamide epichlorohydrin resin, and is diluted to 0.5%-1.5% concentration before adding, and is stirred for 10-20 minutes.

4. The process for producing soft and antibacterial napkin paper based on bamboo pulp and cotton pulp composite as claimed in claim 1, wherein, In S3, the softening agent is amino-modified silicone microemulsion, and has pH value 6-8 and solid content 20%-30%.

5. The process for production of soft anti-bacterial tissue paper based on bamboo and cotton pulp composite as claimed in claim 1 wherein, In S3, the bacteriostatic agent is selected from nano-silver or chitosan, wherein the nano-silver has particle size 10nm-50nm, and the chitosan has deacetylation degree ≥85%.

6. The process for producing soft and antibacterial napkin paper based on bamboo and cotton pulp composite as claimed in claim 1, wherein, In S3, the filler is calcium carbonate, and has fineness ≥800 mesh.

7. The process for producing soft and anti-bacterial napkin paper based on bamboo and cotton pulp composite as claimed in claim 1 wherein, In S3, the pulp is continuously stirred, and the stirring speed is 100-200rpm, and the interval time for adding the dry strength agent, wet strength agent, softening agent, bacteriostatic agent and filler is 2-5 minutes.

8. The process for producing soft and anti-bacterial napkin paper based on bamboo and cotton pulp composite as claimed in claim 1 wherein, In S5, the drying process adopts heat conduction oil heating system, and the temperature control precision is ±2°C.

9. The process for producing soft and anti-bacterial napkin paper based on bamboo and cotton pulp composite as claimed in claim 1 wherein, In S6, the moisturizing treatment adopts glycerol or sorbitol as moisturizing agent, and the adding amount is 0.5%-2% of the mass of the paper sheet, and a high-pressure spraying system is used for atomization, and the atomization particle size is 20μm-50μm.

10. The process for production of soft anti-bacterial tissue paper based on bamboo and cotton pulp composite as claimed in claim 1 wherein, In S6, the sterilization packaging adopts ultraviolet sterilization, and the sterilization time is 5-10 seconds.

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