Manufacturing method of environment-friendly antibacterial paper pet product

Abstract

The invention relates to a manufacturing method of an environment-friendly antibacterial paper pet product, which comprises the following steps: by taking recycled corrugated paper fiber as a main raw material, sequentially carrying out crushing, impurity removal and repulping treatment on recycled corrugated paper to prepare paper pulp, and adding a waterproof additive; carrying out double-stage antibacterial treatment on the paper pulp to form a stable chitosan-silver ion complex; carrying out suction filtration on the paper pulp subjected to the double-stage antibacterial treatment through a paper-plastic molding machine to form a wet blank, naturally pre-drying the wet blank, and then carrying out hot-pressing shaping treatment; and trimming and sterilizing the green body subjected to hot-press shaping to obtain a finished product. According to the invention, the antibacterial agent is uniformly distributed on the surface and inside the paper pulp fiber through the two-stage antibacterial treatment, so that the problems of non-uniform antibacterial property and effect attenuation caused by single antibacterial treatment are avoided; the prepared product not only solves the problem that the product is easy to damage, but also improves the pain point that the pet product is easy to breed bacteria and generate peculiar smell through the antibacterial and waterproof design.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pet products, in particular to a manufacturing method of an environmentally friendly antibacterial paper pet product. BACKGROUND

[0002] With the popularization of pet feeding, the pet product market continues to develop, and consumers have higher requirements for the environmental protection, safety and functionality of pet products. Traditional pet products made of plastic, chemical fiber or solid wood materials are difficult to degrade, so the industry has developed paper-plastic pet products, which have the advantages of easy availability of raw materials and natural degradation, and are in line with the industry development trend of resource recycling, becoming an important direction for industry optimization.

[0003] However, the existing paper-plastic pet products still have many problems to be solved in the manufacturing process and product performance: the paper product does not fully realize efficient recycling of resources, and the overall environmental load is large; the antibacterial treatment often uses a single antibacterial agent, which not only has uneven antibacterial effect and easy attenuation, but also has potential toxicity risk to sensitive pets due to excessive use of some antibacterial components; the waterproof function mostly relies on secondary spraying process, which not only easily causes volatile organic compound pollution, but also is difficult to ensure the uniformity and durability of the waterproof effect; the structure manufacturing mostly uses splicing or roll-sticking process, which leads to poor overall performance, fragile structure, and easy collapse, damage and other situations, and cannot effectively resist pet scratching, biting and chewing behaviors.

[0004] The above problems are worth solving. SUMMARY

[0005] In order to overcome the problems of uneven antibacterial effect, pollution caused by waterproof process and fragile structure of the existing paper-plastic pet products, the present application provides a manufacturing method of an environmentally friendly antibacterial paper pet product.

[0006] The technical scheme of the present application is as follows: A manufacturing method of an environmentally friendly antibacterial paper pet product, comprising the following steps: Step 1, raw material pretreatment; Recycled corrugated paper fibers are used as the main raw material, and the recycled corrugated paper is sequentially crushed, impurity-removed and pulped to prepare paper pulp, and a waterproof additive is added; Step 2, two-stage antibacterial treatment; First stage: adding chitosan solution to the paper pulp, and stirring to combine chitosan with paper pulp fibers to form a preliminary antibacterial layer; Second stage: before the paper pulp is formed, uniformly apply silver ion solution to the surface of the paper pulp by spraying to combine silver ions with chitosan to form a stable chitosan-silver ion complex; Step 3, forming treatment; The paper pulp after the two-stage antibacterial treatment is suction-filtered by a paper-plastic forming machine to form a wet embryo, and the wet embryo is naturally pre-dried and then subjected to hot-pressing setting treatment. Step 4, finished product processing; The green body after the hot-pressing setting is subjected to edge cutting and sterilization treatment to obtain a finished product.

[0007] As a preferred technical solution of the present application, in the first stage of step 2, the amount of chitosan added is 0.5% to 2% of the dry weight of the pulp, and after adding, stirring treatment is performed to mix the chitosan solution and the pulp sufficiently, so as to ensure that the preliminary antibacterial layer is uniformly coated on the surface of the pulp fibers.

[0008] As a preferred technical solution of the present application, in the second stage of step 2, the amount of silver ions added is 0.01% to 0.1% of the dry weight of the pulp, and the dispersion flow state of the pulp is maintained during the spraying process.

[0009] As a preferred technical solution of the present application, in step 1, the pulping treatment is completed by a hydraulic pulper, and a pulp with a concentration of 1% is prepared.

[0010] As a preferred technical solution of the present application, the composition of the additives in step 1 and step 2 includes, by weight percentage: recycled corrugated paper fiber 80-90%, waterproof additive 2-5%, antibacterial additive 0.5-2%, and the balance is tap water and PAE wet strength agent; wherein the waterproof additive is alkyl ketene dimer, and the antibacterial additive is the chitosan-silver ion complex in step 1.

[0011] As a preferred technical solution of the present application, in step 3, the moisture content of the wet embryo formed by suction-filtering of the paper-plastic forming machine is 65-70%, and the moisture content of the wet embryo after natural pre-drying is controlled to be 15%, and then the hot-pressing setting treatment is performed.

[0012] As a preferred technical solution of the present application, in step 3, the conditions of the hot-pressing setting treatment are: temperature 180℃, pressure 0.6MPa, hot-pressing time 45 seconds, and compacted density 0.8 to 0.9g / cm 3 .

[0013] As a preferred technical solution of the present application, in step 4, after the sterilization treatment, antibacterial performance sampling is performed, and the standard test of ISO 22196 "Measurement of Antibacterial Activity of Plastics and Non-porous Surfaces" is adopted, and the bacteriostatic rate ≥90% is qualified.

[0014] As a preferred technical solution of the present application, it further includes: step 5, recycling; The unqualified products generated during the processing are crushed and mixed with the recycled corrugated paper to re-enter the raw material pretreatment process of step 1, so as to realize resource recycling.

[0015] Preferably, in step 5, the mixing ratio of the amount of substandard product powder and recycled corrugated paper is 1:3, and new corrugated paper fibers are supplemented, and the new corrugated paper fibers account for 15% to 25% of the total amount of the mixture.

[0016] The application according to the above scheme has the beneficial effects that: The application uses recycled corrugated paper fibers as the main raw material, realizes the recycling of waste resources, reduces the environmental discharge of waste paper garbage, and the product can be naturally degraded after being discarded, which is in line with the green and environmentally-friendly development concept; the raw material pretreatment process does not need complex chemical modification, and the subsequent extension design of recyclable substandard products further reduces resource consumption and environmental load, solves the problem of difficult degradation and large environmental load of traditional pet product raw materials; The application adopts a two-stage antibacterial treatment process, in the first stage, chitosan and paper pulp fibers are combined through cation adsorption to form a preliminary antibacterial layer, ensuring that the antibacterial components are tightly combined with the fibers, and in the second stage, silver ions are sprayed to form a stable chitosan-silver ion complex, which not only plays a strong antibacterial role of silver ions, but also reduces the amount of silver ions through chitosan complexing, reducing the potential toxicity risk; the two-stage synergy makes the antibacterial agent uniformly distributed on the surface and inside of the paper pulp fibers, avoiding the problem of uneven antibacterial effect and effect decay caused by single antibacterial treatment; finally, the product after sterilization treatment can meet the relevant standard requirements, and has good biocompatibility, which is suitable for the use scene of pets sensitive to chemicals, and has no harmful residue risk; And the waterproof auxiliary agent is added synchronously in the raw material pretreatment stage, so that the waterproof function is integrated into the product matrix before the paper pulp is formed, avoiding the pollution of volatile organic compounds caused by the secondary spraying of traditional technology, while ensuring the uniform and durable waterproof effect, effectively reducing the water absorption rate of the product, preventing moisture absorption, mildew and odor breeding caused by pet activities; the wet embryo is stabilized at a certain water content rate and then compacted at high temperature and high pressure, which not only avoids defects such as deformation and cracking during hot pressing, but also improves the product density and structural strength, giving the product excellent anti-grabbing and anti-biting performance, which is suitable for the pet chewing behavior, and significantly prolongs the service life. The application has the advantages that: It can be seen that the product manufactured by the manufacturing method of the application is suitable for the use scene of pets, which not only solves the problem of easy breakage of the product caused by pet scratching and biting, but also improves the problem of easy breeding of bacteria and generation of odor of pet products through antibacterial and waterproof design. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 A process flow diagram of the method of the present application; Fig. 2 A process flow diagram of raw material pretreatment and two-stage antibacterial treatment in the method; Fig. 3 A process flow diagram of forming treatment and finished product treatment in the method. DETAILED DESCRIPTION

[0018] In order to better understand the purpose, technical solution and technical effect of the present application, the present application will be further explained in combination with the drawings and examples below. It should be noted that similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, it is declared that the following described examples are only for explaining the present application, and are not used to limit the present application.

[0019] As shown in Figs. 1 to 3 A manufacturing method of an environmentally friendly antibacterial paper pet product, comprising the following steps: Step 1, raw material pretreatment; Taking recycled corrugated paper fiber as the main raw material, the recycled corrugated paper is sequentially crushed, impurity removed, and pulped to prepare paper pulp, and a waterproof additive is added; Step 2, two-stage antibacterial treatment; First stage: adding chitosan solution to the paper pulp, stirring to combine chitosan with paper pulp fibers to form a preliminary antibacterial layer; Second stage: before the paper pulp is formed, uniformly apply silver ion solution to the surface of the paper pulp by spraying to combine silver ions with chitosan to form a stable chitosan-silver ion complex; Step 3, forming treatment; The paper pulp after two-stage antibacterial treatment is formed into a wet embryo by suction filtration through a paper plastic forming machine, and the wet embryo is naturally pre-dried, and then heat-pressed and shaped; Step 4, finished product treatment; The green body after heat pressing and shaping is edge cut and sterilized to obtain the finished product.

[0020] In the above scheme, the recovered corrugated paper fiber is used as the main raw material, which is broken, impurity-removed and pulped to fully separate the fibers, realizing the recycling of waste resources and providing a stable base material for the product; the waterproof additive is added synchronously in the raw material pretreatment stage, so that the waterproof function is integrated into the paper pulp matrix in advance, avoiding the pollution of volatile organic compounds caused by traditional secondary spraying, and the waterproof effect is more uniform and durable; in the two-stage antibacterial treatment, chitosan is first combined with the paper pulp fiber cation by stirring to form a tightly attached preliminary antibacterial layer, and then silver ions and chitosan form a stable complex by spraying, which not only plays a strong antibacterial role of silver ions, but also reduces the dosage to reduce the toxicity risk, and ensures that the antibacterial ingredients are evenly distributed on the surface and inside of the fibers; the paper-plastic forming machine is combined with "natural pre-drying + hot pressing", which can stabilize the moisture content of the wet embryo to avoid hot pressing deformation and cracking, and then compact the fibers through high temperature and high pressure to improve the product density and structural strength, which is suitable for the behavior of pet scratching, biting and chewing; finally, the edge cutting ensures the size accuracy, and the sterilization treatment strengthens the health and safety, so that the finished product has the comprehensive performance of environmental protection, antibacterial, waterproof and durability, and solves the core defects of the existing paper-plastic pet products.

[0021] In the present application, in the first stage of step 2, the amount of chitosan added is 0.5% to 2% of the dry weight of the pulp, and after adding, stirring treatment is carried out to mix the chitosan solution and the pulp sufficiently, so as to ensure that the preliminary antibacterial layer is evenly coated on the surface of the pulp fiber. The addition of 0.5% to 2% of chitosan not only ensures the formation effect of the preliminary antibacterial layer, but also avoids waste or affects the formability of the pulp due to excessive dosage; stirring treatment can promote the chitosan solution to fully contact and uniformly mix with the pulp, ensuring that the pulp fiber is evenly coated with chitosan to form a continuous and complete preliminary antibacterial layer, providing a uniform reaction substrate for subsequent silver ion complexation, avoiding uneven antibacterial effect due to local missing of the antibacterial layer, and ensuring the stability of the antibacterial performance.

[0022] In the present application, in the second stage of step 2, the amount of silver ion added is 0.01% to 0.1% of the dry weight of the pulp, and the pulp is maintained in a dispersed flow state during the spraying process. The addition of 0.01% to 0.1% of silver ions not only meets the demand for strong antibacterial effect, but also maximizes the reduction of potential toxicity risk, which is in line with the sensitive characteristics of pets; maintaining the dispersed flow state of the pulp during the spraying process can avoid the agglomeration of the pulp fibers, which leads to uneven spraying of silver ions, ensuring that the silver ions uniformly cover the surface of the fibers and the preliminary antibacterial layer, fully complex with chitosan to form a stable antibacterial complex, further improving the uniformity and durability of the antibacterial effect, and eliminating the problem of local antibacterial failure.

[0023] In the present application, in step 1, the pulping treatment is completed by a hydraulic pulper, and a paper pulp with a concentration of 1% is prepared. The hydraulic pulper can efficiently dissociate the recycled corrugated paper, break the bonding between fibers, avoid fiber agglomeration or residual impurities, and ensure uniform dispersion of fibers; the paper pulp concentration of 1% can balance the fiber dispersibility and molding efficiency, allowing the subsequent addition of waterproofing additives, antibacterial agents and fibers to fully contact and react, and ensuring the integrity of the wet embryo structure during suction filtration of the paper-plastic molding machine, improving the consistency and stability of the overall structure of the product, and avoiding local strength deficiency or molding defects.

[0024] In the present application, the composition of the additives in steps 1 and 2 includes, by weight percentage: recycled corrugated paper fiber 80-90%, waterproofing additive 2-5%, antibacterial additive 0.5-2%, and the balance is tap water and PAE wet strength agent; wherein the waterproofing additive is alkyl ketene dimer, and the antibacterial additive is the chitosan-silver ion complex in step 1. The 80-90% recycled corrugated paper fiber has the largest proportion, realizing resource recycling, reducing environmental load and raw material cost; the 2-5% alkyl ketene dimer (AKD) as an environmentally friendly waterproofing additive can form a stable combination with the pulp fibers, achieving a long-lasting waterproof effect without harmful volatile substances; the 0.5-2% chitosan-silver ion complex precisely matches the antibacterial demand, and the PAE wet strength agent enhances the bonding force between fibers. The scientific proportion of each component synergizes to ensure the environmental properties of the product, while simultaneously meeting the functional requirements of antibacterial, waterproofing and high strength, avoiding the impact of excessive or insufficient single component on overall performance.

[0025] In the present application, in step 3, the wet embryo formed by the paper-plastic molding machine suction filtration has a moisture content of 65-70%, which can ensure the integrity of the wet embryo structure after suction filtration molding and prevent damage, providing a good foundation for product processing. After natural pre-drying, the moisture content of the wet embryo is controlled at 15%, which can effectively remove excess water from the wet embryo, avoid product deformation, cracking or internal air bubbles due to rapid water evaporation during hot pressing, and allow the fibers to be fully compacted and combined during hot pressing, further improving the structural strength and molding quality of the product.

[0026] In the present application, in step 3, the hot pressing conditions are: temperature 180°C, pressure 0.6MPa, hot pressing time 45 seconds, and compacted density 0.8 to 0.9g / cm 3 The temperature, pressure and hot pressing time used can promote the close interweaving and bonding of the pulp fibers, while strengthening the bonding stability of the waterproofing additive, antibacterial compound and fibers. The compacted density of 0.8 to 0.9g / cm 3 The compacted density of 0.8 to 0.9g / cm

[0027] In the present application, in step 4, the sterilization treatment adopts ultraviolet irradiation sterilization, and after the sterilization treatment, the antibacterial performance is randomly sampled and tested according to the ISO 22196 standard test, and the antibacterial rate is greater than or equal to 90% to ensure that the finished product has stable and effective antibacterial ability, can inhibit the growth of common pathogenic bacteria such as Escherichia coli and Staphylococcus aureus, avoid unqualified products from flowing into the market, ensure the safety of pet use, and solve the problem of unstable antibacterial effect of the existing products.

[0028] It also includes waterproof detection and durability detection; wherein the waterproof detection: using a water contact angle measuring instrument to measure the water contact angle of the product surface; after soaking the product in water for 24 hours, the water absorption rate is measured; and the standard for determining a qualified product is: water contact angle ≥ 100°, water absorption rate ≤ 7%. The durability detection: using a mechanical arm to simulate the pet's claw scratching the product surface to check the product damage; and the standard for determining a qualified product is: through visual observation, the product surface has no obvious damage and the structure is complete. It should be noted that the detection method is sampling inspection.

[0029] In the present application, it also includes: step 5, recycling; The unqualified products generated in the processing process are crushed and mixed with recycled corrugated paper to re-enter the raw material pretreatment process of step 1, realizing resource recycling. The present application re-includes the unqualified products into the raw material pretreatment process after crushing, realizes the recycling of production waste, reduces resource waste and environmental load, and further strengthens the environmental protection property of the product; at the same time, avoids the cost loss caused by direct waste of unqualified products, maximizes the resource utilization rate, and meets the development concept of green production.

[0030] In a preferred embodiment, in step 5, the mixing ratio of the unqualified product crushing amount to the recycled corrugated paper is 1:3, which can balance the recycling rate of unqualified products and the performance of raw materials, and avoid the attenuation of product strength or function caused by too high recycling ratio. And supplement new corrugated paper fiber, which accounts for 15% to 25% of the total amount of mixed materials, can effectively make up for the loss of fiber strength in the recycling process, ensure that the fiber bonding force and forming performance of the mixed raw materials meet the standards, make the antibacterial, waterproof and durable performance of the recycled product not lower than the initial product, protect the quality stability of batch production, and maximize the resource recycling rate.

[0031] The recycled product only needs to have antibacterial, waterproof and durable performance not lower than 85% of the initial value to avoid waste caused by endless repeated crushing. It should be noted that the initial value is the antibacterial, waterproof and durable performance data of the qualified product made according to the complete manufacturing method (raw material pretreatment-two-stage antibacterial-molding-post treatment) of the present application under standard test conditions, for example: Antibacterial performance initial value: according to ISO 22196 standard test, the inhibition rate of E. coli / S. aureus is 99%; Waterproof performance initial value: water contact angle is 110°, 24-hour water absorption rate is 5%; Durable performance initial value: cycle number of simulated pet scratching test; And the recycled products produced by mixing the recycled corrugated paper with the unqualified products after crushing can have the antibacterial, waterproof and durable performance data reaching 85% of the initial values respectively.

[0032] In summary, the manufacturing method of the environment-friendly antibacterial paper pet product of the application takes recycled corrugated paper fiber as the core raw material, and is designed to recycle unqualified products, which realizes efficient recycling of waste resources without complex chemical modification, reduces waste paper garbage discharge, reduces resource consumption and environmental load, and deeply fits the green and environmentally friendly development concept; through the two-stage antibacterial treatment process, chitosan and silver ions are precisely complexed, which not only plays a strong antibacterial role, but also controls the amount of antibacterial ingredients to reduce potential toxicity, ensures uniform and long-lasting antibacterial effect and good biocompatibility, and adapts to the characteristics of pets being sensitive to chemicals; the raw material pretreatment stage is synchronized with the environmentally friendly waterproof additive, which avoids the pollution of volatile organic compounds caused by traditional secondary spraying, realizes the deep integration of waterproof function and product matrix, and effectively prevents moisture absorption, mildew and odor breeding; the steps are coherent and coordinated, the paper-plastic integrated molding is combined with scientific pre-drying and hot pressing, which simplifies the production process, significantly improves the product structure strength and integrity, and gives the product excellent anti-scratching and anti-biting performance, completely solving the problem of weak structure caused by traditional splicing or roll adhesion process. The method successfully overcomes the core defects of existing paper-plastic pet products, and the product has multiple advantages such as environmental protection, safety, antibacterial, waterproof and durability, accurately matches the core needs of pet use scenarios, and has outstanding practical value and market application prospect.

[0033] The technical features of the above embodiments can be combined in any way, and to make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the description.

[0034] The above embodiments only express several embodiments of the application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the scope of the application. Therefore, the protection scope of the patent of the application should be subject to the appended claims.

Claims

1. A method for manufacturing environmentally friendly antibacterial paper pet supplies, characterized in that, It includes the following steps: Step 1, raw material pretreatment; Using recycled corrugated paper fiber as the main raw material, the recycled corrugated paper is successively crushed, decontaminated, and pulped to prepare pulp, and a waterproofing agent is added. Step 2, two-stage antibacterial treatment; The first stage: adding a chitosan solution to the pulp and stirring to make chitosan combine with the pulp fibers to form a preliminary antibacterial layer; The second stage: before the pulp is formed, a silver ion solution is uniformly applied to the surface of the pulp by spraying, so that silver ions combine with chitosan to form a stable chitosan-silver ion complex; Step 3, forming treatment; The pulp after two-stage antibacterial treatment is suction-filtered by a paper-plastic forming machine to form a wet embryo. After natural pre-drying of the wet embryo, it is then subjected to hot-pressing and shaping treatment; Step 4, finished product treatment; The坯体after hot-pressing and shaping is trimmed and sterilized to obtain a finished product.

2. The manufacturing method of the environmentally friendly antibacterial paper pet supplies according to claim 1, characterized in that, In the first stage of Step 2, the addition amount of chitosan is 0.5% - 2% of the dry weight of the pulp. After adding, stirring treatment is carried out to fully mix the chitosan solution and the pulp, ensuring that the preliminary antibacterial layer uniformly coats the surface of the pulp fibers.

3. The manufacturing method of the environmentally friendly antibacterial paper pet supplies according to claim 1, characterized in that, In the second stage of Step 2, the addition amount of silver ions is 0.01% - 0.1% of the dry weight of the pulp, and the dispersed flow state of the pulp is maintained during the spraying process.

4. The manufacturing method of the environmentally friendly antibacterial paper pet supplies according to claim 1, characterized in that, In Step 1, the pulping treatment is completed by a hydraulic pulper, and pulp with a concentration of 1% is prepared.

5. The method for manufacturing environmentally friendly antibacterial paper pet supplies according to any one of claims 1 to 4, characterized in that, The composition of the additives in Step 1 and Step 2 includes, by weight percentage: 80 - 90% of recycled corrugated paper fiber, 2 - 5% of waterproofing agent, 0.5 - 2% of antibacterial agent, and the balance is tap water and PAE wet strength agent; among them, the waterproofing agent is alkyl ketene dimer, and the antibacterial agent is the chitosan-silver ion complex in Step 1.

6. The method for manufacturing environmentally friendly antibacterial paper pet supplies according to claim 1, characterized in that, In Step 3, the moisture content of the wet embryo formed by suction-filtering of the paper-plastic forming machine is 65 - 70%, and after natural pre-drying, the moisture content of the wet embryo is controlled to 15%, and then hot-pressing and shaping treatment is carried out.

7. The method for manufacturing environmentally friendly antibacterial paper pet supplies according to claim 1 or 6, characterized in that, In step 3, the conditions for the hot-pressing shaping process are: temperature 180℃, pressure 0.6MPa, hot-pressing time 45 seconds, and compaction density 0.8 to 0.9 g / cm³. 3 .

8. The method for manufacturing environmentally friendly antibacterial paper pet supplies according to claim 1, characterized in that, In Step 4, after the sterilization treatment, a random inspection of the antibacterial performance is carried out. It is tested according to the standard of ISO 22196 "Measurement of Antibacterial Activity on Plastics and Non-Porous Surfaces", and the antibacterial rate ≥ 90% is qualified.

9. The method for manufacturing environmentally friendly antibacterial paper pet supplies according to claim 1, characterized in that, It also includes: Step 5, recycling; The unqualified products generated during the processing are crushed and mixed with recycled corrugated paper, and then re-enter the raw material pretreatment process of Step 1 to achieve resource recycling.

10. The method for manufacturing environmentally friendly antibacterial paper pet supplies according to claim 9, characterized in that, In Step 5, the mixing ratio of the crushed amount of unqualified products to recycled corrugated paper is 1:3, and new corrugated paper fibers are supplemented. The new corrugated paper fibers account for 15% - 25% of the total amount of the mixture.

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