Water-resistant bobbin body paper and process thereof

Abstract

The invention provides water-resistant bobbin base paper and a process thereof, and the bobbin base paper comprises the following components in parts by weight: 80-120 parts of a natural wood fiber raw material, 3-9 parts of chitosan, 4-12 parts of a waterproof emulsion, 3-9 parts of a treating agent, 2-6 parts of a defoaming agent, 1-3 parts of a sterilizing agent and 2-4 parts of a cross-linking agent, the natural wood fiber raw material is one or a mixture of more of commercial paper pulp, waste paper and straw agricultural wastes; the commercial paper pulp is one or more mixed pulp of bleached softwood pulp, bleached hardwood pulp, dissolving pulp or unbleached paper pulp, the preparation process is simple, the prepared bobbin body paper has the advantages of high strength, water resistance and easiness in printing, meanwhile, the bobbin body paper also has excellent waterproof performance, and the service life of a bobbin paper product is prolonged.

Description

Technical Field

[0001] This application relates to the field of yarn tube base paper preparation technology, and in particular to a water-resistant yarn tube base paper and its process. Background Technology

[0002] Yarn tube paper is mainly used in the production of cores and pipes, including industrial pipes, mulch film pipes, fireworks pipes, textile pipes, spiral pipes, pagoda pipes, parallel pipes, various paper corner protectors, cartons, honeycomb cardboard, etc. It is an industrial paper specially supplied to the textile industry for making paper yarn tubes and conical paper tubes.

[0003] The existing paper tubes have poor water resistance. If water splashes onto the surface of the paper tube products, the water will be absorbed by the paper tube products in a very short time, which will cause the paper tube products to deform and be damaged, affecting their service life.

[0004] In addition, the existing yarn tube paper has low overall tensile strength, is easily damaged, and has a limited service life. Therefore, it is necessary to improve it. Summary of the Invention

[0005] This application provides a water-resistant yarn tube base paper and its process to solve the problems of poor waterproof performance and low structural strength in the preparation of yarn tube base paper in the prior art. The resulting yarn tube base paper has the advantages of high strength, water resistance, and easy printing. The process has low energy consumption and is suitable for large-scale production. At the same time, it also has excellent waterproof performance and extends the service life of yarn tube paper products.

[0006] This application provides a water-resistant yarn tube base paper, the yarn tube base paper components by weight include 80-120 parts of natural wood fiber raw material, 3-9 parts of chitosan, 4-12 parts of waterproof emulsion, 3-9 parts of treatment agent, 2-6 parts of defoamer, 1-3 parts of bactericide, and 2-4 parts of crosslinking agent.

[0007] Furthermore, the natural wood fiber raw material is one or a mixture of several of commercial pulp, waste paper, and straw-like agricultural waste; the commercial pulp is one or a mixture of bleached softwood pulp, bleached hardwood pulp, dissolving pulp, or unbleached pulp.

[0008] Furthermore, the treatment agent components, by weight, include 8-12 parts of sodium alkyl sulfonate, 5-15 parts of polyacrylamide aqueous solution, 2-6 parts of a leveling agent, 1-4 parts of surfactant, and 3-9 parts of polyamine epichlorohydrin resin. The added treatment agent can improve pulp quality, increase fiber strength, shorten cooking time during preparation, increase the degree of polymerization of the pulp, and thus improve the overall structural strength of the yarn tube paper.

[0009] Furthermore, the defoamer components, by weight, include 4-10 parts boric acid, 4-10 parts sodium bromide, 5-15 parts calcium stearate, 3-9 parts polymethylsiloxane, 2-8 parts hydrophobic silica, and 20-30 parts deionized water. The added defoamer exhibits good dispersibility and defoaming performance, effectively solving problems such as short duration of defoaming, poor dispersibility, and poor foam suppression effect, thereby further improving the preparation quality of yarn tube paper.

[0010] Furthermore, the bactericide components, by weight, include 8-18 parts of guanidine polymer, 10-20 parts of N-octylisothiazolinone, 80-140 parts of diethylene glycol, 5-15 parts of dodecyl dimethyl benzyl ammonium chloride, 20-30 parts of 5-chloro-2-methylisothiazolin-3-one, and 30-50 parts of sodium hypochlorite. The bactericide exhibits a synergistic effect through the reaction between the guanidine polymer, N-octylisothiazolinone, diethylene glycol, dodecyl dimethyl benzyl ammonium chloride, and 5-chloro-2-methylisothiazolin-3-one, effectively inhibiting microbial growth during the preparation of the base paper. Sodium hypochlorite plays a bactericidal and bacteriostatic role, further improving the quality of the base paper.

[0011] Furthermore, the crosslinking agent is a tetrafunctional aziridine crosslinking agent or a trifunctional aziridine crosslinking agent, and the concentration is 99±0.2wt%. The added crosslinking agent can prevent the base paper from breaking during the preparation process, further improving the preparation quality.

[0012] Furthermore, the waterproof emulsion is composed of 30% polytetrafluoroethylene, 20% polyurethane, 20% polyester synthetic resin, 5% polyvinyl alcohol solution, 5% silicone oil, and 20% deionized water. The added waterproof emulsion exhibits excellent waterproof and water-resistant properties, forming a complete protective layer on the outer wall of the yarn tube paper to block water molecule clusters, thereby improving the waterproof performance of the yarn tube paper and extending its service life.

[0013] Furthermore, a process for preparing water-resistant yarn tube base paper is provided. This process is simple, and the resulting yarn tube base paper possesses advantages such as high strength, water resistance, and ease of printing. The process has low energy consumption, making it suitable for large-scale production. It also exhibits excellent waterproof performance, extending the service life of yarn tube paper products. The process includes the following steps:

[0014] A. Preparation of slurry:

[0015] a. Mix natural wood fiber raw materials, chitosan, and cross-linking agent, then add them to a pulping equipment for fiberization pulping to obtain pulp;

[0016] b. After adding the treatment agent to the pulp, put it into a cooking pot for cooking; the cooking temperature is 55℃-65℃, the cooking time is 50min-80min, and the pulp is stirred continuously during the cooking process. After that, it is slowly cooled to room temperature to obtain papermaking pulp.

[0017] B. Filter the paper pulp obtained in step A once to obtain a primary pulp solution;

[0018] C. Add defoamer and bactericide to the slurry, stir thoroughly at room temperature at a stirring speed of 1200-2400 rpm for 40-60 minutes, and then let stand for 30 minutes to obtain the slurry composition.

[0019] D. The slurry composition is filtered twice to obtain a secondary slurry;

[0020] E. The secondary pulp is fed into a paper machine for extrusion molding, so that the pulp is processed into yarn tube paper.

[0021] F. After uniformly spraying waterproof emulsion onto the surface of the yarn tube paper, place it in a drying oven for low-temperature drying.

[0022] G. Finally, cut the dried yarn tube paper at low temperature, roll it up, and store it.

[0023] Furthermore, the secondary filtering method in step D is as follows:

[0024] a. First, prepare the vibrating screen and install multiple screens from top to bottom in the screening chamber of the vibrating screen, with each screen connected to an external frequency regulator.

[0025] b. The slurry composition is fed into the screening bin from the feed port of the vibrating screen.

[0026] c. Control each screen to a different working frequency, that is, adjust the vibration amplitude of each screen, and the vibration amplitude of multiple screens decreases sequentially from top to bottom;

[0027] d. The slurry composition is sieved through multiple screens and finally discharged into a collection box.

[0028] Furthermore, in step F, the low-temperature drying temperature is 45℃-50℃, and the low-temperature drying time is 50min-80min.

[0029] Beneficial effects:

[0030] (1) The bactericide added in this invention produces a synergistic effect through the reaction between guanidine polymer, N-octylisothiazolinone, diethylene glycol, dodecyl dimethyl benzyl ammonium chloride, and 5-chloro-2-methylisothiazolin-3-one, which can effectively inhibit the growth of microorganisms in the preparation of base paper. Sodium hypochlorite can play a bactericidal and bacteriostatic role, further improving the quality of base paper preparation.

[0031] (2) The preparation process of the present invention employs a secondary filtration step, which can effectively filter impurities generated during the preparation process, improve pulp quality, and thus improve the preparation quality of yarn tube paper.

[0032] The above description is merely an overview of the technical solutions of the embodiments of this application. In order to better understand the technical means of the embodiments of this application and to implement them in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the embodiments of this application more obvious and understandable, specific implementation methods of this application are described below. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the embodiments of this application. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0035] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0036] Furthermore, the terms "once," "twice," etc., used in the specification and claims of this application are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0037] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application are described clearly and completely below.

[0038] Example 1:

[0039] This application provides a water-resistant yarn tube base paper, the composition of which by weight includes 80 parts of natural wood fiber raw material, 3 parts of chitosan, 4 parts of waterproof emulsion, 3 parts of treatment agent, 2 parts of defoamer, 1 part of bactericide, and 2 parts of crosslinking agent.

[0040] In this embodiment, the natural wood fiber raw material is a mixture of commercial pulp and waste paper; the commercial pulp is a mixture of bleached softwood pulp and bleached hardwood pulp.

[0041] In this embodiment, the treatment agent components include, by weight, 8 parts sodium alkyl sulfonate, 5 parts aqueous polyacrylamide solution, 2 parts of a sizing agent, 1 part surfactant, and 3 parts polyamine epichlorohydrin resin. The treatment agent added in this invention can improve pulp quality, increase fiber strength, shorten cooking time during preparation, increase the degree of polymerization of the pulp, and thus improve the overall structural strength of the yarn tube paper.

[0042] In this embodiment, the defoamer components, by weight, include 4 parts boric acid, 4 parts sodium bromide, 5 parts calcium stearate, 3 parts polymethylsiloxane, 2 parts hydrophobic silica, and 20 parts deionized water. The defoamer added in this invention exhibits good dispersibility and defoaming performance, effectively solving problems such as short duration of defoaming, poor dispersibility, and poor foam suppression effect, thereby further improving the preparation quality of yarn tube paper.

[0043] In this embodiment, the bactericide components, by weight, include 8 parts of guanidine polymer, 10 parts of N-octylisothiazolinone, 80 parts of diethylene glycol, 5 parts of dodecyl dimethyl benzyl ammonium chloride, 20 parts of 5-chloro-2-methylisothiazolin-3-one, and 30 parts of sodium hypochlorite. The bactericide added in this invention exhibits excellent bactericidal and bacteriostatic properties, effectively inhibiting microbial growth during the preparation of base paper and improving the quality of base paper production.

[0044] In this embodiment, the crosslinking agent is a tetrafunctional aziridine crosslinking agent with a concentration of 99±0.2wt%. The crosslinking agent added in this invention can prevent delamination of the base paper during the preparation process, further improving the preparation quality.

[0045] In this embodiment, the waterproof emulsion is composed of 30% polytetrafluoroethylene, 20% polyurethane, 20% polyester synthetic resin, 5% polyvinyl alcohol solution, 5% silicone oil, and 20% deionized water. The waterproof emulsion added in this invention exhibits excellent waterproof and water-resistant properties, forming a complete protective layer on the outer wall of the yarn tube paper to block water molecule clusters, thereby improving the waterproof performance of the yarn tube paper and extending its service life.

[0046] The preparation process of a water-resistant yarn tube base paper in this embodiment includes the following steps:

[0047] A. Preparation of slurry:

[0048] a. Mix natural wood fiber raw materials, chitosan, and cross-linking agent, then add them to a pulping equipment for fiberization pulping to obtain pulp;

[0049] b. After adding the treatment agent to the pulp, put it into a cooking pot for cooking; the cooking temperature is 55℃ and the cooking time is 50min. Stir constantly during the cooking process, and then slowly cool it to room temperature to obtain papermaking pulp.

[0050] B. Filter the paper pulp obtained in step A once to obtain a primary pulp solution;

[0051] C. Add defoamer and bactericide to the slurry, stir thoroughly at room temperature at a stirring speed of 1200 rpm for 40 min, and then let stand for 30 min to obtain the slurry composition.

[0052] D. The slurry composition is filtered twice to obtain a secondary slurry;

[0053] E. The secondary pulp is fed into a paper machine for extrusion molding, so that the pulp is processed into yarn tube paper.

[0054] F. After uniformly spraying waterproof emulsion onto the surface of the yarn tube paper, place it in a drying oven for low-temperature drying.

[0055] G. Finally, cut the dried yarn tube paper at low temperature, roll it up, and store it.

[0056] In this embodiment, the secondary filtering method in step D is as follows:

[0057] a. First, prepare the vibrating screen and install multiple screens from top to bottom in the screening chamber of the vibrating screen, with each screen connected to an external frequency regulator.

[0058] b. The slurry composition is fed into the screening bin from the feed port of the vibrating screen.

[0059] c. Control each screen to a different working frequency, that is, adjust the vibration amplitude of each screen, and the vibration amplitude of multiple screens decreases sequentially from top to bottom;

[0060] d. The slurry composition is sieved through multiple screens and finally discharged into a collection box.

[0061] In this embodiment, the low-temperature drying temperature in step F is 45°C, and the low-temperature drying time is 50 min.

[0062] Example 2:

[0063] A water-resistant yarn tube base paper, the yarn tube base paper components by weight include 120 parts of natural wood fiber raw material, 9 parts of chitosan, 12 parts of waterproof emulsion, 9 parts of treatment agent, 6 parts of defoamer, 3 parts of bactericide, and 4 parts of crosslinking agent.

[0064] In this embodiment, the natural wood fiber raw material is a mixture of waste paper and straw-like agricultural waste; the commercial pulp is a mixture of bleached softwood pulp and dissolving pulp.

[0065] In this embodiment, the treatment agent components include, by weight, 12 parts sodium alkyl sulfonate, 15 parts polyacrylamide aqueous solution, 6 parts of a sizing agent, 4 parts surfactant, and 9 parts polyamine epichlorohydrin resin. The treatment agent added in this invention can improve pulp quality, increase fiber strength, shorten cooking time during preparation, increase the degree of polymerization of the pulp, and thus improve the overall structural strength of the yarn tube paper.

[0066] In this embodiment, the defoamer components, by weight, include 10 parts boric acid, 10 parts sodium bromide, 15 parts calcium stearate, 9 parts polymethylsiloxane, 8 parts hydrophobic silica, and 30 parts deionized water. The defoamer added in this invention exhibits good dispersibility and defoaming performance, effectively solving problems such as short duration of defoaming, poor dispersibility, and poor foam suppression effect, thereby further improving the preparation quality of yarn tube paper.

[0067] In this embodiment, the bactericide components, by weight, include 18 parts of guanidine polymer, 20 parts of N-octylisothiazolinone, 140 parts of diethylene glycol, 15 parts of dodecyl dimethyl benzyl ammonium chloride, 30 parts of 5-chloro-2-methylisothiazolin-3-one, and 50 parts of sodium hypochlorite. The bactericide added in this invention exhibits excellent bactericidal and bacteriostatic properties, effectively inhibiting microbial growth during the preparation of base paper and improving the quality of base paper production.

[0068] In this embodiment, the crosslinking agent is a trifunctional aziridine crosslinking agent with a concentration of 99±0.2wt%. The crosslinking agent added in this invention can prevent delamination of the base paper during the preparation process, further improving the preparation quality.

[0069] In this embodiment, the waterproof emulsion is composed of 30% polytetrafluoroethylene, 20% polyurethane, 20% polyester synthetic resin, 5% polyvinyl alcohol solution, 5% silicone oil, and 20% deionized water. The waterproof emulsion added in this invention exhibits excellent waterproof and water-resistant properties, forming a complete protective layer on the outer wall of the yarn tube paper to block water molecule clusters, thereby improving the waterproof performance of the yarn tube paper and extending its service life.

[0070] The preparation process of a water-resistant yarn tube base paper in this embodiment includes the following steps:

[0071] A. Preparation of slurry:

[0072] a. Mix natural wood fiber raw materials, chitosan, and cross-linking agent, then add them to a pulping equipment for fiberization pulping to obtain pulp;

[0073] b. After adding the treatment agent to the pulp, put it into a cooking pot for cooking; the cooking temperature is 65℃ and the cooking time is 80 minutes. Stir constantly during the cooking process, and then slowly cool it to room temperature to obtain papermaking pulp.

[0074] B. Filter the paper pulp obtained in step A once to obtain a primary pulp solution;

[0075] C. Add defoamer and bactericide to the slurry, mix thoroughly at room temperature, stirring at a speed of 2400 rpm for 60 minutes, and then let stand for 30 minutes to obtain the slurry composition.

[0076] D. The slurry composition is filtered twice to obtain a secondary slurry;

[0077] E. The secondary pulp is fed into a paper machine for extrusion molding, so that the pulp is processed into yarn tube paper.

[0078] F. After uniformly spraying waterproof emulsion onto the surface of the yarn tube paper, place it in a drying oven for low-temperature drying.

[0079] G. Finally, cut the dried yarn tube paper at low temperature, roll it up, and store it.

[0080] In this embodiment, the secondary filtering method in step D is as follows:

[0081] a. First, prepare the vibrating screen and install multiple screens from top to bottom in the screening chamber of the vibrating screen, with each screen connected to an external frequency regulator.

[0082] b. The slurry composition is fed into the screening bin from the feed port of the vibrating screen.

[0083] c. Control each screen to a different working frequency, that is, adjust the vibration amplitude of each screen, and the vibration amplitude of multiple screens decreases sequentially from top to bottom;

[0084] d. The slurry composition is sieved through multiple screens and finally discharged into a collection box.

[0085] In this embodiment, the low-temperature drying temperature in step F is 50°C, and the low-temperature drying time is 80 min.

[0086] Example 3:

[0087] A water-resistant yarn tube base paper, the yarn tube base paper components by weight include 90 parts of natural wood fiber raw material, 4 parts of chitosan, 5 parts of waterproof emulsion, 4 parts of treatment agent, 3 parts of defoamer, 2 parts of bactericide, and 3 parts of crosslinking agent.

[0088] In this embodiment, the natural wood fiber raw material is a mixture of commercial pulp and straw-like agricultural waste; the commercial pulp is a mixture of bleached softwood pulp, bleached hardwood pulp, and dissolving pulp.

[0089] In this embodiment, the treatment agent components include, by weight, 9 parts sodium alkyl sulfonate, 6 parts aqueous polyacrylamide solution, 3 parts of a sizing agent, 2 parts surfactant, and 4 parts polyamine epichlorohydrin resin. The treatment agent added in this invention can improve pulp quality, increase fiber strength, shorten cooking time during preparation, increase the degree of polymerization of the pulp, and thus improve the overall structural strength of the yarn tube paper.

[0090] In this embodiment, the defoamer components, by weight, include 5 parts boric acid, 5 parts sodium bromide, 6 parts calcium stearate, 4 parts polymethylsiloxane, 3 parts hydrophobic silica, and 22 parts deionized water. The defoamer added in this invention exhibits good dispersibility and defoaming performance, effectively solving problems such as short duration of defoaming, poor dispersibility, and poor foam suppression effect, thereby further improving the preparation quality of yarn tube paper.

[0091] In this embodiment, the bactericide components, by weight, include 10 parts of guanidine polymer, 12 parts of N-octylisothiazolinone, 100 parts of diethylene glycol, 6 parts of dodecyl dimethyl benzyl ammonium chloride, 22 parts of 5-chloro-2-methylisothiazolin-3-one, and 35 parts of sodium hypochlorite. The bactericide added in this invention exhibits excellent bactericidal and bacteriostatic properties, effectively inhibiting microbial growth during the preparation of base paper and improving the quality of base paper production.

[0092] In this embodiment, the crosslinking agent is a tetrafunctional aziridine crosslinking agent with a concentration of 99±0.2wt%. The crosslinking agent added in this invention can prevent delamination of the base paper during the preparation process, further improving the preparation quality.

[0093] In this embodiment, the waterproof emulsion is composed of 30% polytetrafluoroethylene, 20% polyurethane, 20% polyester synthetic resin, 5% polyvinyl alcohol solution, 5% silicone oil, and 20% deionized water. The waterproof emulsion added in this invention exhibits excellent waterproof and water-resistant properties, forming a complete protective layer on the outer wall of the yarn tube paper to block water molecule clusters, thereby improving the waterproof performance of the yarn tube paper and extending its service life.

[0094] The preparation process of a water-resistant yarn tube base paper in this embodiment includes the following steps:

[0095] A. Preparation of slurry:

[0096] a. Mix natural wood fiber raw materials, chitosan, and cross-linking agent, then add them to a pulping equipment for fiberization pulping to obtain pulp;

[0097] b. After adding the treatment agent to the pulp, put it into a cooking pot for cooking; the cooking temperature is 57℃ and the cooking time is 55min. Stir constantly during the cooking process, and then slowly cool it to room temperature to obtain papermaking pulp.

[0098] B. Filter the paper pulp obtained in step A once to obtain a primary pulp solution;

[0099] C. Add defoamer and bactericide to the slurry, stir thoroughly at room temperature at a stirring speed of 1400 rpm for 45 min, and then let stand for 30 min to obtain the slurry composition.

[0100] D. The slurry composition is filtered twice to obtain a secondary slurry;

[0101] E. The secondary pulp is fed into a paper machine for extrusion molding, so that the pulp is processed into yarn tube paper.

[0102] F. After uniformly spraying waterproof emulsion onto the surface of the yarn tube paper, place it in a drying oven for low-temperature drying.

[0103] G. Finally, cut the dried yarn tube paper at low temperature, roll it up, and store it.

[0104] In this embodiment, the secondary filtering method in step D is as follows:

[0105] a. First, prepare the vibrating screen and install multiple screens from top to bottom in the screening chamber of the vibrating screen, with each screen connected to an external frequency regulator.

[0106] b. The slurry composition is fed into the screening bin from the feed port of the vibrating screen.

[0107] c. Control each screen to a different working frequency, that is, adjust the vibration amplitude of each screen, and the vibration amplitude of multiple screens decreases sequentially from top to bottom;

[0108] d. The slurry composition is sieved through multiple screens and finally discharged into a collection box.

[0109] In this embodiment, the low-temperature drying temperature in step F is 46°C and the low-temperature drying time is 60 min.

[0110] Example 4:

[0111] A water-resistant yarn tube base paper, the yarn tube base paper components by weight include 100 parts of natural wood fiber raw material, 8 parts of chitosan, 10 parts of waterproof emulsion, 8 parts of treatment agent, 5 parts of defoamer, 2 parts of bactericide, and 3 parts of crosslinking agent.

[0112] In this embodiment, the natural wood fiber raw material is a mixture of commercial pulp and waste paper; the commercial pulp is a mixture of bleached softwood pulp and unbleached pulp.

[0113] In this embodiment, the treatment agent components include, by weight, 11 parts sodium alkyl sulfonate, 14 parts polyacrylamide aqueous solution, 5 parts of a sizing agent, 3 parts surfactant, and 8 parts polyamine epichlorohydrin resin. The treatment agent added in this invention can improve pulp quality, increase fiber strength, shorten cooking time during preparation, increase the degree of polymerization of the pulp, and thus improve the overall structural strength of the yarn tube paper.

[0114] In this embodiment, the defoamer components, by weight, include 9 parts boric acid, 9 parts sodium bromide, 14 parts calcium stearate, 8 parts polymethylsiloxane, 7 parts hydrophobic silica, and 28 parts deionized water. The defoamer added in this invention exhibits good dispersibility and defoaming performance, effectively solving problems such as short duration of defoaming, poor dispersibility, and poor foam suppression effect, thereby further improving the preparation quality of yarn tube paper.

[0115] In this embodiment, the bactericide components, by weight, include 16 parts of guanidine polymer, 18 parts of N-octylisothiazolinone, 120 parts of diethylene glycol, 14 parts of dodecyl dimethyl benzyl ammonium chloride, 28 parts of 5-chloro-2-methylisothiazolin-3-one, and 48 parts of sodium hypochlorite. The bactericide added in this invention exhibits excellent bactericidal and bacteriostatic properties, effectively inhibiting microbial growth during the preparation of base paper and improving the quality of base paper production.

[0116] In this embodiment, the crosslinking agent is a tetrafunctional aziridine crosslinking agent with a concentration of 99±0.2wt%. The crosslinking agent added in this invention can prevent delamination of the base paper during the preparation process, further improving the preparation quality.

[0117] In this embodiment, the waterproof emulsion is composed of 30% polytetrafluoroethylene, 20% polyurethane, 20% polyester synthetic resin, 5% polyvinyl alcohol solution, 5% silicone oil, and 20% deionized water. The waterproof emulsion added in this invention exhibits excellent waterproof and water-resistant properties, forming a complete protective layer on the outer wall of the yarn tube paper to block water molecule clusters, thereby improving the waterproof performance of the yarn tube paper and extending its service life.

[0118] The preparation process of a water-resistant yarn tube base paper in this embodiment includes the following steps:

[0119] A. Preparation of slurry:

[0120] a. Mix natural wood fiber raw materials, chitosan, and cross-linking agent, then add them to a pulping equipment for fiberization pulping to obtain pulp;

[0121] b. After adding the treatment agent to the pulp, put it into a cooking pot for cooking; the cooking temperature is 63℃ and the cooking time is 70min. Stir constantly during the cooking process, and then slowly cool it to room temperature to obtain papermaking pulp.

[0122] B. Filter the paper pulp obtained in step A once to obtain a primary pulp solution;

[0123] C. Add defoamer and bactericide to the slurry, stir thoroughly at room temperature at a stirring speed of 2000 rpm for 55 min, and then let stand for 30 min to obtain the slurry composition.

[0124] D. The slurry composition is filtered twice to obtain a secondary slurry;

[0125] E. The secondary pulp is fed into a paper machine for extrusion molding, so that the pulp is processed into yarn tube paper.

[0126] F. After uniformly spraying waterproof emulsion onto the surface of the yarn tube paper, place it in a drying oven for low-temperature drying.

[0127] G. Finally, cut the dried yarn tube paper at low temperature, roll it up, and store it.

[0128] In this embodiment, the secondary filtering method in step D is as follows:

[0129] a. First, prepare the vibrating screen and install multiple screens from top to bottom in the screening chamber of the vibrating screen, with each screen connected to an external frequency regulator.

[0130] b. The slurry composition is fed into the screening bin from the feed port of the vibrating screen.

[0131] c. Control each screen to a different working frequency, that is, adjust the vibration amplitude of each screen, and the vibration amplitude of multiple screens decreases sequentially from top to bottom;

[0132] d. The slurry composition is sieved through multiple screens and finally discharged into a collection box.

[0133] In this embodiment, the low-temperature drying temperature in step F is 48°C, and the low-temperature drying time is 70 min.

[0134] Example 5:

[0135] A water-resistant yarn tube base paper, the yarn tube base paper components by weight include 100 parts of natural wood fiber raw material, 6 parts of chitosan, 8 parts of waterproof emulsion, 6 parts of treatment agent, 4 parts of defoamer, 2 parts of bactericide, and 3 parts of crosslinking agent.

[0136] In this embodiment, the natural wood fiber raw material is a mixture of commercial pulp, waste paper, and straw-like agricultural waste; the commercial pulp is a mixture of bleached softwood pulp, bleached hardwood pulp, dissolving pulp, and unbleached pulp.

[0137] In this embodiment, the treatment agent components include, by weight, 10 parts sodium alkyl sulfonate, 10 parts polyacrylamide aqueous solution, 4 parts of a sizing agent, 3 parts surfactant, and 6 parts polyamine epichlorohydrin resin. The treatment agent added in this invention can improve pulp quality, increase fiber strength, shorten the cooking time during the preparation process, increase the degree of polymerization of the pulp, and thus improve the overall structural strength of the yarn tube paper.

[0138] In this embodiment, the defoamer components, by weight, include 7 parts boric acid, 7 parts sodium bromide, 10 parts calcium stearate, 6 parts polymethylsiloxane, 5 parts hydrophobic silica, and 25 parts deionized water. The defoamer added in this invention exhibits good dispersibility and defoaming performance, effectively solving problems such as short duration of defoaming, poor dispersibility, and poor foam suppression effect, thereby further improving the preparation quality of yarn tube paper.

[0139] In this embodiment, the bactericide components, by weight, include 13 parts of guanidine polymer, 15 parts of N-octylisothiazolinone, 110 parts of diethylene glycol, 10 parts of dodecyl dimethyl benzyl ammonium chloride, 25 parts of 5-chloro-2-methylisothiazolin-3-one, and 40 parts of sodium hypochlorite. The bactericide added in this invention exhibits excellent bactericidal and bacteriostatic properties, effectively inhibiting microbial growth during the preparation of base paper and improving the quality of base paper production.

[0140] In this embodiment, the crosslinking agent is a tetrafunctional aziridine crosslinking agent or a trifunctional aziridine crosslinking agent, and the concentration is 99±0.2wt%. The crosslinking agent added in this invention can prevent the base paper from breaking during the preparation process, further improving the preparation quality.

[0141] In this embodiment, the waterproof emulsion is composed of 30% polytetrafluoroethylene, 20% polyurethane, 20% polyester synthetic resin, 5% polyvinyl alcohol solution, 5% silicone oil, and 20% deionized water. The waterproof emulsion added in this invention exhibits excellent waterproof and water-resistant properties, forming a complete protective layer on the outer wall of the yarn tube paper to block water molecule clusters, thereby improving the waterproof performance of the yarn tube paper and extending its service life.

[0142] The preparation process of a water-resistant yarn tube base paper in this embodiment includes the following steps:

[0143] A. Preparation of slurry:

[0144] a. Mix natural wood fiber raw materials, chitosan, and cross-linking agent, then add them to a pulping equipment for fiberization pulping to obtain pulp;

[0145] b. After adding the treatment agent to the pulp, put it into a cooking pot for cooking; the cooking temperature is 60℃ and the cooking time is 65min. Stir constantly during the cooking process, and then slowly cool it to room temperature to obtain papermaking pulp.

[0146] B. Filter the paper pulp obtained in step A once to obtain a primary pulp solution;

[0147] C. Add defoamer and bactericide to the slurry, stir thoroughly at room temperature at a stirring speed of 1800 rpm for 50 min, and then let stand for 30 min to obtain the slurry composition.

[0148] D. The slurry composition is filtered twice to obtain a secondary slurry;

[0149] E. The secondary pulp is fed into a paper machine for extrusion molding, so that the pulp is processed into yarn tube paper.

[0150] F. After uniformly spraying waterproof emulsion onto the surface of the yarn tube paper, place it in a drying oven for low-temperature drying.

[0151] G. Finally, cut the dried yarn tube paper at low temperature, roll it up, and store it.

[0152] In this embodiment, the secondary filtering method in step D is as follows:

[0153] a. First, prepare the vibrating screen and install multiple screens from top to bottom in the screening chamber of the vibrating screen, with each screen connected to an external frequency regulator.

[0154] b. The slurry composition is fed into the screening bin from the feed port of the vibrating screen.

[0155] c. Control each screen to a different working frequency, that is, adjust the vibration amplitude of each screen, and the vibration amplitude of multiple screens decreases sequentially from top to bottom;

[0156] d. The slurry composition is sieved through multiple screens and finally discharged into a collection box.

[0157] In this embodiment, the low-temperature drying temperature in step F is 47°C, and the low-temperature drying time is 65 min.

[0158] Experimental example:

[0159] The performance of the yarn tube base paper prepared according to the various embodiments of the present invention was tested. The base paper prepared according to each embodiment was immersed in deionized water for 1 hour, and then the waterproof yarn tube paper of the embodiments was rubbed 8 times in deionized water under a pressure of 80N. The surface of the yarn tube paper was then tested. In addition, yarn tube paper from the prior art was tested under the same conditions, and the surface of the yarn tube paper was also tested. The data obtained are shown in the table below:

[0160]

[0161]

[0162] In summary, the preparation process of this invention is simple, and the resulting yarn tube base paper has the advantages of high strength, water resistance, and easy printing. The process has low energy consumption and is suitable for large-scale production. It also has excellent waterproof performance, which extends the service life of yarn tube paper products.

[0163] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A water-resistant tube paper, characterized by, The yarn tube base paper component includes natural wood fiber raw material 80-120 parts by weight, chitosan 3-9 parts by weight, waterproof emulsion 4-12 parts by weight, treating agent 3-9 parts by weight, defoaming agent 2-6 parts by weight, bactericide 1-3 parts by weight, and crosslinking agent 2-4 parts by weight.

2. The water-resistant tube paper according to claim 1, wherein The natural wood fiber raw material is one or a mixture of several of commercial pulp, waste paper, and straw agricultural waste; the commercial pulp is one or a mixture of several of bleached coniferous pulp, bleached broadleaf pulp, dissolving pulp, or unbleached pulp.

3. The water-resistant tube paper according to claim 1, wherein The treating agent component includes sodium alkyl sulfonate 8-12 parts by weight, polyacrylamide aqueous solution 5-15 parts by weight, Perkadox Zero 2-6 parts by weight, surfactant 1-4 parts by weight, and polyamine epichlorohydrin resin 3-9 parts by weight.

4. The water-resistant tube paper according to claim 1, wherein The defoaming agent component includes boric acid 4-10 parts by weight, sodium bromide 4-10 parts by weight, calcium stearate 5-15 parts by weight, polymethylsiloxane 3-9 parts by weight, hydrophobic white carbon black 2-8 parts by weight, and deionized water 20-30 parts by weight.

5. The water-resistant tube paper according to claim 1, wherein The bactericide component includes guanidino polymer 8-18 parts by weight, N-octyl isothiazolinone 10-20 parts by weight, diethylene glycol 80-140 parts by weight, dodecyl dimethyl benzyl ammonium chloride 5-15 parts by weight, 5-chloro-2-methyl isothiazolin-3-one 20-30 parts by weight, and sodium hypochlorite 30-50 parts by weight.

6. The water-resistant tube paper according to claim 1, wherein The crosslinking agent is a tetrafunctional aziridine crosslinking agent or a tri-functional aziridine crosslinking agent, and the concentration is 99±0.2wt%.

7. The water-resistant tube paper according to claim 1, wherein The waterproof emulsion is composed of 30% polytetrafluoroethylene, 20% polyurethane, 20% polyethylene terephthalate synthetic resin, 5% polyvinyl alcohol solution, 5% silicone oil, and 20% deionized water.

8. A process for the preparation of a water resistant tube paper according to claim 1, characterized in that, The preparation process includes the following steps: A. Preparation of slurry: a. Mix the natural wood fiber raw material, chitosan, and crosslinking agent, then add them to a pulping device for fiberization and pulping treatment to obtain a slurry; b. Add the treating agent to the slurry and put it into a cooking pot for cooking; the cooking temperature is 55-65℃, the cooking time is 50-80min, and the slurry is continuously stirred during the cooking process, then slowly cooled to room temperature to obtain a papermaking slurry; B. Filter the papermaking slurry obtained in step A once to obtain a primary slurry; C. Add the defoaming agent and bactericide to the primary slurry, mix thoroughly at room temperature, the stirring rate is 1200-2400rpm, the stirring time is 40-60min, then stand for 30min to obtain a slurry composition; D. Filter the slurry composition twice to obtain a secondary slurry; E. Send the secondary slurry into a papermaking machine for extrusion molding to process the slurry into a yarn tube paper; F. Uniformly spray the waterproof emulsion on the surface of the yarn tube paper, then send it into a drying box for low-temperature drying; G. Finally, cut and roll the low-temperature dried yarn tube paper for storage.

9. The process for the preparation of water-resistant tube paper according to claim 8, characterized in that, The secondary filtering method in step D is as follows: a. First, prepare a vibrating screen machine, install multiple screens in the screening bin of the vibrating screen machine from top to bottom, and connect each screen with an external frequency regulator; b. Pour the slurry composition into the screening bin from the feeding port of the vibrating screen machine; c. Controlling each screen to be at different working frequencies, i.e. adjusting the vibration amplitude of each screen, and the vibration amplitudes of the multiple screens decrease in turn from top to bottom; d. The slurry composition is screened by the vibration of the multiple screens, and finally discharged into the collection box.

10. The process for the preparation of water resistant tube paper according to claim 8, characterized in that, The low-temperature drying temperature in step F is 45-50°C, and the low-temperature drying time is 50-80 min.

Images