Anti-slip and anti-scald paper cup and manufacturing process

Abstract

The invention provides an anti-skid and anti-scald paper cup and a manufacturing process, and relates to the technical field of paper cups, the anti-skid and anti-scald paper cup comprises a cup cylinder and a cup bottom, and the cup cylinder is composed of an outer layer, a middle layer and an inner layer. The manufacturing process of the anti-skid and anti-scald paper cup comprises the following steps: S1, preparing raw materials; s2, compounding three layers; s3, compounding a paper roll; s4, cup sheet die cutting; s5, forming a cup cylinder; s6, sealing the cup bottom; s7, performing function detection; and S8, cup stacking and packaging. The bagasse fiber honeycomb structure paperboard is adopted in the middle layer, a micropore structure formed through air heat insulation and enzymolysis is combined, the heat conduction coefficient is greatly reduced and is far lower than that of a traditional paper cup, and a user is effectively prevented from being scalded when holding the cup; the inner-layer food-grade coated paper and the PLA or PE coating realize efficient seepage prevention; due to the three-dimensional anti-skid grains on the outer layer, the anti-skid friction force is increased by 40% compared with that of a traditional paper cup in a wet hand state, and the risk that the paper cup falls off due to hand slip is reduced; the temperature change ink accurately changes color when the temperature of the beverage is higher than 50 DEG C, high temperature is visually prompted, and the use safety of a user is further guaranteed.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of paper cups, and particularly relates to an anti-slip and anti-scald paper cup and its manufacturing process. Background Art

[0002] Disposable paper cups are widely used in scenarios such as dining, office work, and meetings due to their convenience and hygiene. With the improvement of consumers' requirements for the quality of life and the tightening of environmental protection policies, the limitations of traditional disposable paper cups in aspects such as heat insulation, anti-slip, and environmental protection have become increasingly prominent, and technological innovation is urgently needed.

[0003] In terms of heat insulation and anti-slip performance, traditional disposable paper cups mostly adopt a single-layer or double-layer paper structure, and only achieve the anti-seepage function through PE film coating. This structure cannot effectively block heat conduction. When containing high-temperature beverages, the temperature of the outer layer of the paper cup often exceeds 55°C, which is extremely likely to cause burns to users. At the same time, its surface is smooth or only has simple concave and convex patterns, and the friction is insufficient in the wet hand state, there is a risk of the paper cup slipping and the beverage spilling, especially in dynamic scenarios such as outdoors and in vehicles, and the potential safety hazards are more prominent. In terms of environmental protection, the inner layer PE film coating of traditional paper cups belongs to non-degradable plastics, and it takes more than 200 years to completely decompose after being discarded, causing long-term pollution to the soil and water bodies. Traditional paper cups can no longer meet the market's demand for green and environmentally friendly products. In addition, existing paper cups have a single function and only have the basic function of containing, and cannot meet users' diverse needs for product safety, intelligence, and personalization. In response to the above problems, although there are some improvement solutions in the industry, such as adding a heat insulation cotton layer and using an anti-slip sleeve, etc., there are problems such as high cost, complex production process, and inability to adapt to existing production lines, making it difficult to promote on a large scale. Summary of the Invention

[0004] 1. Technical problems to be solved by the invention: The present invention provides an anti-slip and anti-scald paper cup and its manufacturing process to solve the technical problems existing in the above background art.

[0005] 2. Technical solutions: To achieve the above object, the technical solution provided by the present invention is: an anti-slip and anti-scald paper cup, comprising a cup barrel and a cup bottom, the cup barrel is composed of an outer layer, a middle layer, and an inner layer, the outer layer, the middle layer, and the inner layer are arranged in sequence from outside to inside and are thermally pressed and compounded through a dot-shaped environmentally friendly water-based adhesive; several three-dimensional anti-slip patterns are arranged on the outer layer, and at least one of the anti-slip patterns is coated with thermochromic ink, and when the temperature of the beverage in the paper cup is higher than °C, the thermochromic ink changes color.

[0006] Preferably, the inner layer is food-grade laminated paper coated with PLA or PE, the middle layer is a bagasse fiber honeycomb-structured cardboard, which is pressed from bagasse after beating and enzymatic hydrolysis into a structure with hexagonal or irregular honeycomb holes, the outer layer uses embossed texture paper, and the three-dimensional anti-slip pattern is a dot matrix, corrugated or diamond structure.

[0007] A manufacturing process for an anti-slip and anti-scalding paper cup includes the following steps: S1. Raw material preparation, preparing papers for the outer layer, middle layer and inner layer; S2. Three-layer lamination, applying glue to the three papers of the outer layer, middle layer and inner layer, and hot-pressing and laminating them into an integral structure; S3. Composite paper roll, curing and cooling the composite paper; S4. Cup sheet die-cutting, a numerical control die-cutting machine makes a mold according to the size, and cuts the composite paper into cup sheets; S5. Cup barrel forming, the die-cut cup sheets are rolled into a cup barrel by a winding device; S6. Cup bottom sealing, using an ultrasonic cup bottom heat-sealing machine, the cup bottom disc is pre-coated with hot-melt adhesive. After the cup barrel and the cup bottom are aligned, at an ultrasonic frequency of 20 - 30 kHz, heat-seal for 2 - 3 seconds under a pressure of 0.2 - 0.3 MPa; S7. Function detection, detecting the temperature change, heat insulation and anti-slip performance, and removing unqualified products; S8. Stacking cup packaging, the qualified products are stacked by an automatic stacking machine and then put into a packaging bag.

[0008] Preferably, the S1 step further includes: S11. Pretreatment, cleaning the bagasse with a drum-type cleaning machine, cleaning with rotary spraying and brushes to remove impurities in the bagasse. After cleaning, the bagasse enters a double-screw pulp press for preliminary dehydration to reduce the moisture content to 50% - 60%; S12. Using a horizontal hydraulic pulper, putting the dehydrated bagasse and water in a ratio of 1:3, pulping at a speed of 1200 - 1500 r / min for 20 - 30 minutes to fully disperse the fibers and form a uniform pulp; S13. Preparation of middle layer micropores, adding a composite enzyme preparation of cellulase and hemicellulase accounting for 0.5% - 1% of the dry weight of the pulp to the pulp, adjusting the pH value to 4.5 - 5.5, temperature to 50 - 55 °C, and stirring speed to 80 - 100 r / min in an enzymatic hydrolysis reaction tank, reacting for 1 - 2 hours, and regularly detecting the beating degree to 30 - 40 °SR during the period to form a microporous structure; S14. Using a belt dryer, drying the enzymatically hydrolyzed pulp to a moisture content of 8% - 10% under the conditions of 80 - 90 °C and a conveyor belt speed of 0.5 - 1 m / min, and then pressing it into a cardboard with a thickness of 1.0 - 1.5 mm and a honeycomb pore diameter of 3 - 5 mm under a pressure of 8 - 10 MPa by a hydraulic honeycomb cardboard forming machine.

[0009] Preferably, the step S1 further includes: S15. Printing thermochromic ink with a temperature resistance above 120 °C on the embossed texture paper of the outer layer by flexographic printing process, and laminating after printing; S16. Extrusion coating the inner layer of the coated paper with PLA or PE coating with a thickness of 15 - 20 μm by an extrusion coating machine.

[0010] Preferably, the step S2 further includes: S21. The environmentally friendly water-based adhesive is transported to the dispensing head through a metering pump. The distance between the dispensing heads is 10 - 15 mm, and dot-shaped glue is applied on the paper surface in a "cross" pattern. The diameter of the glue dots is 3 - 5 mm, and the glue application amount is controlled at 8 - 10 g / ㎡; S22. Synchronously feeding the outer, middle, and inner layers of paper into a laminator. The temperature of the hot pressing roller is set at 120 - 130 °C, the pressure is 0.3 - 0.5 MPa, and the lamination speed is 5 - 8 m / min to ensure that the three-layer materials are closely bonded.

[0011] Preferably, the step S3 further includes: S31. The composite material enters a tunnel curing furnace. The temperature in the furnace is 60 - 70 °C, and the residence time is 10 - 15 minutes to fully dry and cure the glue; S32. Cooling the material temperature to room temperature by air cooling. The cooled composite paper tube is wound into a roll, and the diameter is controlled at 80 - 100 cm, and it is stored in a constant temperature and humidity environment for standby. The constant temperature and humidity environment is a temperature of 20 - 25 °C and a humidity of 40% - 60%.

[0012] 3. Beneficial effects: Adopting the technical solution provided by the present invention, compared with the prior art, it has the following beneficial effects: The middle layer of the present invention adopts a bagasse fiber honeycomb structure cardboard, which combines air heat insulation and the microporous structure formed by enzymatic hydrolysis, greatly reducing the thermal conductivity coefficient. When containing 90 °C hot water, the temperature of the outer layer is only 42 °C, far lower than that of traditional paper cups, effectively preventing users from being scalded when holding the cup. The food-grade coated paper of the inner layer of the present invention and the PLA or PE coating achieve high-efficiency anti-seepage. The three-dimensional anti-slip pattern on the outer layer of the present invention has a 40% higher anti-slip friction force in the wet hand state than that of traditional paper cups, reducing the risk of the paper cup falling due to hand slipping; the thermochromic ink accurately changes color when the temperature of the drink is higher than 50 °C, intuitively indicating high temperature and further ensuring the safety of users. All three layers of the material of the present invention are made of environmentally friendly materials. The middle layer of bagasse fiber is the reuse of agricultural waste. The outer layer of bio-based flexible plastic and the inner layer of PLA coating are both degradable and can be completely decomposed within 3 to 6 months under industrial composting conditions, greatly reducing environmental pollution compared with traditional paper cups. Using bagasse as the main raw material to replace part of the traditional pulp reduces carbon emissions during the production process; and the energy consumption of the production process is basically the same as that of the traditional process, meeting the low-carbon development trend. The present invention meets personalized needs, improves the added value of products and brand recognition, is suitable for multi-scenario applications such as high-end catering, aviation, and office, and significantly enhances market competitiveness. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is an exploded schematic diagram of the present invention; Figure 3 is a process flow diagram of the present invention.

[0014] Reference numerals: 1, outer layer; 2, middle layer; 3, inner layer; 4, cup bottom; 5, anti-slip pattern; 6, thermochromic ink. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] To facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0016] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0017] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0018] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "linked", "fixed", "equipped with", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] It should be noted that the structures not introduced in the present invention, since they do not involve the design key points and improvement directions of the present invention, are the same as the prior art or can be implemented by using the prior art, and will not be elaborated here. Embodiment

[0020] Referring to the attached Figures 1 to 3 , a non-slip and heat-insulating paper cup, comprising a cup barrel and a cup bottom 4. The cup barrel is composed of an outer layer 1, a middle layer 2, and an inner layer 3. The outer layer 1, the middle layer 2, and the inner layer 3 are arranged in sequence from outside to inside and are thermally pressed and compounded by a dot-shaped environmentally friendly water-based adhesive to form a stable and tight overall structure, which not only ensures the strength of the paper cup but also ensures that it is not easy to leak and deform when containing liquid.

[0021] The inner layer 3 is a food-grade coated paper with PLA or PE coating. By using a food-grade coated paper with PLA or PE coating, this material has excellent anti-seepage performance and can effectively prevent the leakage of beverages, ensuring the safe storage of beverages in the paper cup. PLA coating belongs to a biodegradable material and has significant advantages in terms of environmental protection; PE coating has a lower cost and also meets food safety standards, and can be flexibly selected according to actual needs.

[0022] The middle layer 2 is made of bagasse fiber honeycomb structure cardboard. Its unique hexagonal or irregular honeycomb hole structure is the key to achieving efficient heat insulation. After the bagasse is pulped and enzymatically hydrolyzed, a large number of micropores are generated in the fiber structure, further reducing the thermal conductivity of the material. This structure can effectively block the conduction of heat from the inner layer to the outer layer. When containing high-temperature beverages, it can significantly reduce the temperature of the outer layer of the paper cup, prevent the user from being scalded when holding the cup, and at the same time can extend the heat preservation time of the beverage.

[0023] Corrugated texture paper is selected, and a number of three-dimensional anti-slip patterns 5 are arranged on the surface. The three-dimensional anti-slip patterns 5 adopt structures such as dot matrix, corrugation, or diamond. By increasing the surface roughness, the anti-slip performance of the paper cup is greatly improved. Even in the wet hand state, it can effectively increase the friction force and reduce the risk of the paper cup slipping. In addition, at least one anti-slip pattern 5 is coated with thermochromic ink 6. When the temperature of the beverage in the paper cup is higher than 50 °C, the thermochromic ink 6 will change color, intuitively reminding the user that the beverage is in a high-temperature state, avoiding scalding and increasing the safety of use.

[0024] A manufacturing process for a non-slip and heat-insulating paper cup, comprising the following steps: S1. Raw material preparation, preparing papers for the outer layer 1, the middle layer 2, and the inner layer 3; S2. Three-layer lamination, applying adhesive to the three papers of the outer layer 1, the middle layer 2, and the inner layer 3, and laminating them into an integral structure by hot pressing; S3. Composite paper rolling, curing and cooling the composite paper; S4. Cup piece die-cutting, a numerical control die-cutting machine makes a mold according to the size, and cuts the composite paper into cup pieces; S5. Cup cylinder forming, the die-cut cup pieces are rolled into a cup cylinder by a winding device; S6. Cup bottom sealing, using an ultrasonic cup bottom heat-sealing machine, pre-coating the cup bottom disc with hot melt adhesive, after the cup cylinder and the cup bottom are aligned, heat-sealing for 2 - 3 seconds at an ultrasonic frequency of 20 - 30 kHz and a pressure of 0.2 - 0.3 MPa; S7. Function detection, detecting the temperature change, heat insulation, and anti-slip performance, and rejecting unqualified products; S8. Stacking cup packaging, the qualified products are stacked by an automatic stacking machine and then put into a packaging bag.

[0025] Step S1 further includes: S11. Pretreatment, cleaning the bagasse with a drum-type washing machine, cleaning by rotating spraying and brushes to remove impurities in the bagasse, and the washed bagasse enters a double-screw pulp press for preliminary dehydration to reduce the moisture content to 50% - 60%; S12. Using a horizontal hydraulic pulper, putting the dehydrated bagasse and water in a ratio of 1:3, pulping at a speed of 1200 - 1500 r / min for 20 - 30 minutes to fully disperse the fibers and form a uniform pulp; S13. Middle layer micropore preparation, adding a composite enzyme preparation of cellulase and hemicellulase accounting for 0.5% - 1% of the dry weight of the pulp to the pulp, adjusting the pH value to 4.5 - 5.5, the temperature to 50 - 55 °C, and the stirring speed to 80 - 100 r / min in an enzymatic hydrolysis reaction tank, reacting for 1 - 2 hours, regularly detecting the beating degree to 30 - 40 °SR during this period, and generating a large number of micropores in the fiber structure through enzymatic hydrolysis to optimize the heat insulation performance of the material; S14. Using a belt dryer, drying the enzymatically hydrolyzed pulp to a moisture content of 8% - 10% under the conditions of a drying temperature of 80 - 90 °C and a conveyor belt speed of 0.5 - 1 m / min, and then pressing it into a honeycomb-shaped hollow cardboard with a thickness of 1.0 - 1.5 mm and a honeycomb pore diameter of 3 - 5 mm under a pressure of 8 - 10 MPa by a hydraulic honeycomb cardboard forming machine as the middle layer heat insulation material of the paper cup.

[0026] S15. The embossed textured paper of the outer layer 1 is printed with a flexographic printing process, and a temperature-variable ink with a temperature resistance of more than 120°C is printed, and the printing pattern accuracy reaches 150-200 lines / inch. After printing, a lamination treatment is performed to enhance the wear resistance of the ink and ensure that the temperature-variable function is stable and reliable during use; S16. The inner layer 3 of the laminated paper is laminated with 15-20 μm thick PLA or PE by an extrusion laminating machine to form an impermeable and waterproof protective layer to ensure the safety of the beverage.

[0027] Step S2 also includes: S21. Environmentally friendly water-based glue is delivered to the glue dispensing head through a metering pump. The distance between the glue dispensing heads is 10-15mm. The glue is applied in a cross-shaped pattern on the surface of the paper. The diameter of the glue dots is 3-5mm. The amount of glue applied is controlled at 8-10g / ㎡ to ensure that the glue is evenly distributed and in an appropriate amount, which can not only ensure the bonding strength between the layers, but also avoid excessive glue affecting the quality of the paper cup; S22. The outer layer 1, the middle layer 2 and the inner layer 3 are fed into the laminating machine simultaneously. The temperature of the hot pressing roller is set to 120-130°C, the pressure is 0.3-0.5MPa, and the laminating speed is 5-8m / min. Under the action of high temperature and high pressure, the three layers of materials are closely attached to form a stable composite structure.

[0028] The S3 step also includes: S31, the composite materials enter the tunnel curing furnace, the temperature in the furnace is 60-70°C, and the residence time is 10-15 minutes, so that the glue is fully dried and cured, and the bonding strength between the three layers of materials is further enhanced; S32. The material temperature is lowered to room temperature through air cooling. The cooled composite paper tube material is rolled into a roll with a diameter of 80 to 100 cm. It is stored in a constant temperature and humidity environment for standby use. The constant temperature and humidity environment has a temperature of 20 to 25°C and a humidity of 40% to 60% to prevent the material from getting damp or deformed and to ensure the quality of subsequent processing.

[0029] S7, functional testing, testing temperature change, heat insulation, and anti-slip performance: Temperature change function detection: Use an infrared heating device to simulate a temperature environment above 50°C, and observe the color change of the temperature change ink 6. If the color cannot be changed accurately, the product will be automatically rejected. When the temperature reaches 50°C, the pattern turns red accurately, and the prompt function is sensitive and reliable.

[0030] Thermal insulation performance test: Use a thermal imager to detect the temperature difference between the inner and outer layers of the paper cup. If the temperature difference is less than the standard value, it means that the thermal insulation performance does not meet the standard and is judged as an unqualified product. Anti-slip effect evaluation: Use a friction coefficient tester to simulate a wet hand environment and test the friction coefficient of the paper cup surface. Products below the standard value will be eliminated to ensure that the anti-slip performance of the products shipped meets the requirements.

[0031] Performance testing and data verification: Heat insulation performance testing method: Inject 90°C hot water into the paper cup, and use a temperature sensor to measure the temperature changes at different positions on the outer layer of the paper cup within 10 minutes. Anti-slip performance testing method: Simulate a wet hand environment, apply a certain pressure on the surface of the paper cup, and measure the frictional force required to push the paper cup. The results are shown in the following table:

[0032] Test results: After 10 minutes, the temperature of the outer layer of the traditional single-layer paper cup rises to about 68°C, while the temperature of the outer layer of the paper cup in this solution is only 51°C, and the heat insulation effect is significantly better than that of traditional products. The anti-slip frictional force of the paper cup in this solution is about twice that of the traditional paper cup, effectively reducing the risk of hand slipping. In addition, the anti-deformation ability is improved by more than 50%, and the degradation period is also significantly reduced.

[0033] The above embodiments only represent certain implementation manners of the present invention, and the description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the present invention patent; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention; therefore, the protection scope of the present invention patent should be subject to the appended claims.

Claims

1. A non-slip and heat-insulating paper cup, characterized in that: It includes a cup cylinder and a cup bottom (4). The cup cylinder is composed of an outer layer (1), a middle layer (2), and an inner layer (3). The outer layer (1), the middle layer (2), and the inner layer (3) are arranged from outside to inside in sequence and are thermally pressed and compounded through dot-shaped environmentally friendly water-based glue. A number of three-dimensional anti-slip patterns (5) are provided on the outer layer (1), and thermochromic ink (6) is coated on at least one of the anti-slip patterns (5). When the temperature of the drink in the paper cup is higher than 50 °C, the thermochromic ink (6) changes color.

2. The anti-slip and anti-scalding paper cup according to claim 1, wherein: The inner layer (3) is a food-grade coated paper with PLA or PE coating. The middle layer (2) is a bagasse fiber honeycomb structure cardboard. The cardboard is pressed from bagasse after beating and enzymatic hydrolysis to form a structure with hexagonal or irregular honeycomb holes. The outer layer (1) uses embossed texture paper, and the three-dimensional anti-slip pattern (5) is a dot matrix, corrugated or diamond structure.

3. The manufacturing process of a non-slip and heat-insulating paper cup, characterized in that, It includes the following steps: S1. Raw material preparation, prepare the papers for the outer layer (1), the middle layer (2), and the inner layer (3). S2. Three-layer compounding, apply glue to the three papers of the outer layer (1), the middle layer (2), and the inner layer (3), and thermally press and compound them into an integrated structure. S3. Composite paper roll, cure and cool the composite paper. S4. Cup sheet die-cutting, use a numerical control die-cutting machine to make a die according to the size, and cut the composite paper into cup sheets. S5. Cup cylinder forming, the die-cut cup sheets are rolled into a cup cylinder by a reel device. S6. Cup bottom sealing, use an ultrasonic cup bottom heat-sealing machine. The cup bottom round sheet is pre-coated with hot-melt adhesive. After the cup cylinder and the cup bottom are aligned, heat-seal at a pressure of 0.2 - 0.3 MPa for 2 - 3 seconds at an ultrasonic frequency of 20 - 30 kHz. S7. Function detection, detect the thermochromic, heat insulation, and anti-slip properties, and reject unqualified products. S8. Stacked cup packaging, stack the qualified products through an automatic stacking machine, and then put them into a packaging bag.

4. The manufacturing process of a non-slip and heat-insulating paper cup according to claim 3, characterized in that, The S1 step further includes: S11. Pretreatment, clean the bagasse with a drum-type cleaning machine, clean it through rotary spraying and brushes to remove impurities in the bagasse. After cleaning, the bagasse enters a double-screw pulp press for preliminary dehydration to reduce the moisture content to 50% - 60%. S12. Use a horizontal hydraulic pulper, put the dehydrated bagasse and water in a ratio of 1:3, and pulp at a speed of 1200 - 1500 r / min for 20 - 30 minutes to fully disperse the fibers and form a uniform pulp. S13. Middle layer micropore preparation, add a composite enzyme preparation of cellulase and hemicellulase accounting for 0.5% - 1% of the dry weight of the pulp to the pulp, adjust the pH value to 4.5 - 5.5, the temperature to 50 - 55 °C, and the stirring speed to 80 - 100 r / min in an enzymatic hydrolysis reaction tank, react for 1 - 2 hours, and regularly detect the beating degree to 30 - 40 °SR during the period to form a microporous structure. S14. Use a belt dryer to dry the enzymatically hydrolyzed pulp to a moisture content of 8% - 10% at 80 - 90 °C and a conveyor belt speed of 0.5 - 1 m / min, and then press it into a cardboard with a thickness of 1.0 - 1.5 mm and a honeycomb pore diameter of 3 - 5 mm under a pressure of 8 - 10 MPa by a hydraulic honeycomb cardboard forming machine.

5. The manufacturing process of a non-slip and heat-insulating paper cup according to claim 4, characterized in that, The S1 step further includes: S15. The embossed textured paper of the outer layer (1) is printed with thermochromic ink resistant to temperatures above 120°C by flexographic printing, and then laminated after printing; S16. The laminated paper of the inner layer (3) is laminated with 15 - 20 μm thick PLA or PE by an extrusion lamination machine.

6. The manufacturing process of a non-slip and heat-insulating paper cup according to claim 3, characterized in that, The S2 step further includes: S21. The environmentally friendly water - based glue is transported to the dispensing head by a metering pump. The distance between the dispensing heads is 10 - 15 mm, and dot - like glue application is carried out on the paper surface in a "cross" pattern. The diameter of the glue dots is 3 - 5 mm, and the glue application amount is controlled at 8 - 10 g / ㎡; S22. The three - layer papers of the outer layer (1), the middle layer (2) and the inner layer (3) are synchronously fed into a laminator. The temperature of the hot - pressing roller is set at 120 - 130°C, the pressure is 0.3 - 0.5 MPa, and the lamination speed is 5 - 8 m / min to ensure that the three - layer materials are closely bonded.

7. The manufacturing process of a non-slip and heat-insulating paper cup according to claim 3, characterized in that, The S3 step further includes: S31. The composite material enters a tunnel - type curing furnace. The temperature in the furnace is 60 - 70°C, and the residence time is 10 - 15 minutes to fully dry and cure the glue; S32. The temperature of the material is reduced to room temperature by air cooling. The cooled composite paper tube is wound into a roll, and the diameter is controlled at 80 - 100 cm and stored in a constant - temperature and constant - humidity environment for standby. The constant - temperature and constant - humidity environment is at a temperature of 20 - 25°C and a humidity of 40% - 60%.

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