Paper straw manufacturing method and paper straw manufacturing system

Abstract

To solve the problems of glue-bonded paper straws, such as inefficiency in the manufacturing process and inconvenience during drinking, a method for manufacturing paper straws is provided, including the steps of unwinding a plurality of paper strips, each having a thermal adhesive coating material on at least one surface thereof, from a plurality of rolls; heating the unwound paper strips by a heater; winding the heated paper strips around a core rod by a belt to form spare straws; advancing the spare straws along the longitudinal direction of the core rod by a moving guide unit; and cutting the advanced spare straws by a cutting unit to form straws.

Description

[Technical Field]

[0001] The present invention relates to a method for producing paper straws having a paper component and a system for performing the method. [Background technology]

[0002] Conventional straws have mostly been made of plastic. Plastic straws have the advantages of being easy to process, low manufacturing costs, lightweight, and not contaminating drinks when used. However, due to their material properties, they take a long time to decompose after disposal and are harmful to the human body, leading to growing calls for an alternative.

[0003] To address this demand, continuous development is being conducted into methods for reusing manufactured straws or replacing the straw components themselves with environmentally friendly materials. For example, reusable straws made of plastic or metal have been proposed. However, straws are often used in stores, and in such cases, reusing straws has limitations due to hygiene and the infrastructure of each store.

[0004] For these reasons, disposable straws made of paper have recently been proposed. Disposable straws made of paper are not only harmless to the human body but also minimize environmental pollution, making them a valuable alternative to conventional plastic straws.

[0005] Paper straws are manufactured by wrapping a paper band around the straw diagonally multiple times to secure it in place. However, with conventional paper straws, the shape is fixed by applying glue after the paper band is wrapped and then curing it.

[0006] However, such glue-bonded paper straws require a drying process during the manufacturing process, which is inefficient in terms of time and space. Furthermore, foreign matter may adhere to the straw and harden during the drying process. Furthermore, when the produced paper straw is placed in a beverage, the solidified glue may dissolve again, altering the beverage's ingredients. Furthermore, because the glue dissolves easily, the beverage may easily soak into the straw's paper, destroying the straw's shape and preventing it from performing its functions. Summary of the Invention [Problem to be solved by the invention]

[0007] The present invention aims to solve the problems of the glue-bonded paper straws mentioned above, such as the inefficiency of the manufacturing process and the inconvenience during drinking. [Means for solving the problem]

[0008] In order to achieve the above and other objects, according to one aspect of the present invention, there is provided a method for manufacturing paper straws, including the steps of unwinding a plurality of paper strips, each having a thermal adhesive coating material on at least one surface thereof, from a plurality of rolls, heating the unwound paper strips by a heater, winding the heated paper strips around a core rod by a belt to form preliminary straws, moving the preliminary straws along the longitudinal direction of the core rod by a moving guide unit, and cutting the advanced preliminary straws by a cutting unit to form straws.

[0009] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, wherein the heated paper bands are wound around the core rod with at least one region overlapping each other.

[0010] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, wherein the inner surface of the paper band that is wound around the outer circumferential surface of the core rod among the plurality of paper bands is not provided with a thermal adhesive coating material.

[0011] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, wherein the heater is heated to 350 to 380 degrees.

[0012] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, further comprising the step of pre-unwinding the paper bands by an expanding guide roller before the step of heating the unwound paper bands by a heater.

[0013] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, which comprises heating and pressing the inner end of the paper strip wound on the roll and the outer end of the paper strip wound on the spare roll to form a continuous paper strip.

[0014] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, further comprising, after the step of forming the straws, moving and stacking the formed straws by a conveyor, and packaging the stacked straws.

[0015] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, wherein the belt forms a closed loop, the belt is installed across two cylinders provided on both sides of the core rod, and the two cylinders rotate to cause the belt to pressurize the paper band.

[0016] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, wherein the belt is wound around the outer periphery of the two cylinders to form an "8" shape, and one side of the intersection line is wound around the core rod once.

[0017] According to another aspect of the present invention, there is provided a method for manufacturing paper straws, which does not include a step of drying the preliminary straws or the formed straws after the step of advancing the preliminary straws or the step of forming the straws.

[0018] According to another aspect of the present invention, there is provided a paper straw manufacturing system including: a roll having a paper strip with a thermal adhesive coating material on at least one surface; a core rod around which the paper strip unwound from the roll is wound; a heater for heating the thermal adhesive coating material on the paper strip; a belt for twisting the paper strip around the core rod to form preliminary straws; a moving guide unit for moving the preliminary straws along the length of the core rod; and a cutting unit for cutting the advanced preliminary straws to form straws.

[0019] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the belt twists a plurality of paper strips around the core rod to form the preliminary straws, and an inner surface of one of the plurality of paper strips that directly faces the core rod is not provided with a thermal adhesive coating material.

[0020] According to another aspect of the present invention, there is provided a paper straw manufacturing system, further comprising an oil supplying unit that applies oil to an inner surface of the paper web that directly contacts the core rod, wherein the oil includes soybean oil.

[0021] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the heater includes a hot air supply surface formed to face both sides of the paper web, and the hot air supply surface is formed with porous ducts that distribute and supply the hot air.

[0022] According to another aspect of the present invention, there is provided a paper straw manufacturing system, in which a plurality of paper bands are provided, and the hot air supply surface is provided on both sides of each of the plurality of paper bands.

[0023] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein two hot air supply surfaces provided on both sides of each of the plurality of paper bands form a slit between them through which the paper band passes.

[0024] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the hot air supply surface has a trapezoidal shape whose width narrows along the traveling direction of the paper strip.

[0025] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the heater has a length of 30 cm to 45 cm based on the direction in which the paper strip passes through, and the paper strip is fed at a speed of 50 meters / min to 65 meters / min.

[0026] According to another aspect of the present invention, there is provided a paper straw manufacturing system, further comprising an input position adjusting unit that determines the position of the paper strip to be input into the core rod and increases the tension.

[0027] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the feeding position adjustment unit is variably provided so as to be movable in the thickness direction and width direction of the paper strip.

[0028] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the rolls include a roll provided with an inner paper band corresponding to the inner paper of the paper straw, an inner paper roll provided with an inner paper band corresponding to the inner paper of the paper straw, and an outer paper roll provided with an outer paper band corresponding to the outer paper of the paper straw.

[0029] According to another aspect of the present invention, there is provided a paper straw manufacturing system in which the widths of the inner paper band, the middle paper band, and the outer paper band increase sequentially, and the system further includes an input position adjustment unit that determines the position of the paper bands input into the core rod and increases the tension, and one side of the inner paper band in the width direction is wound around the core rod at a distance to create a gap with the other side of the next turn, and the input position adjustment unit is adjusted so that one side of the middle paper band and the outer paper band in the width direction at least partially overlaps with the other side of the next turn.

[0030] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the outer surface of the outer paper band is coated with a thermal adhesive coating material at 1 gsm to 3 gsm, and the inner surface of the outer paper band, the inner and outer surfaces of the middle paper band, and the outer surface of the inner paper band are coated with a thermal adhesive coating material at 5 gsm to 10 gsm.

[0031] According to another aspect of the present invention, there is provided a paper straw manufacturing system, wherein the inner paper band, the middle paper band, and the outer paper band are made of kraft paper, and the inner surface of the outer paper band, the inner and outer surfaces of the middle paper band, and the outer surface of the inner paper band are coated with a thermal adhesive coating material at 7 gsm to 10 gsm.

[0032] According to another aspect of the present invention, there is provided a paper straw manufacturing system, further comprising a roll installation unit including a guide roller for pre-unwinding and installing the paper band of the roll.

[0033] According to another aspect of the present invention, there is provided a paper straw manufacturing system in which a plurality of guide rollers are provided on one side and the other side, and a plurality of expanding guide rollers are provided to allow the preliminarily unwound paper strip to pass through in a zigzag pattern, and the guide rollers on one side and the guide rollers on the other side are provided with a narrow gap between them.

[0034] According to another aspect of the present invention, there is provided a paper straw manufacturing system, further comprising a spare roll provided after the roll, and a connecting unit that heats and presses an inner end of the paper strip of the roll and an outer end of the paper strip of the spare roll to form a continuous paper strip.

[0035] According to another aspect of the present invention, there is provided a paper straw manufacturing system that further includes a conveyor along which the formed straws move and are stacked, but does not include a drying means for drying the spare straws or the formed straws.

[0036] According to another aspect of the present invention, there is provided a paper straw manufacturing system further including two cylinders respectively provided on both sides of the core rod, the belt forming a closed loop, the belt being installed across the two cylinders, and the two cylinders rotating so that the belt applies pressure to the paper band.

[0037] According to another aspect of the present invention, there is provided a paper straw manufacturing system in which the belt is wound around the outer periphery of the two cylinders to form an "8" shape, and one side of the intersection line is wound around the core rod once to proceed. [Effects of the Invention]

[0038] The effects of the paper straw manufacturing method and paper straw manufacturing system according to the present invention will be described as follows.

[0039] According to at least one embodiment of the present invention, paper straws can be produced immediately without a drying process, thereby saving production time and space for drying.

[0040] In addition, according to at least one of the embodiments of the present invention, since a drying process is not included, the problem of foreign matter adhering during the production of paper straws can be solved.

[0041] Furthermore, according to at least one embodiment of the present invention, since a drying process is not included, it is possible to save additional space and manpower that would otherwise be required.

[0042] Furthermore, according to at least one embodiment of the present invention, a sterilization effect is generated by heating, particularly high-temperature hot air, so that hygienic paper straws can be produced.

[0043] Furthermore, according to at least one of the embodiments of the present invention, the glue does not dissolve when drinking, so the taste of the drink is not altered and the shape of the straw can be maintained for a long time.

[0044] Further scope of applicability of the present invention will become apparent from the following detailed description. However, since various changes and modifications within the spirit and scope of the present invention will be apparent to those of ordinary skill in the art, it should be understood that the detailed description and specific embodiments, such as the preferred embodiment of the present invention, are given by way of example only. [Brief explanation of the drawings]

[0045] [Figure 1] 1A and 1B are a front view and a partial longitudinal cross-sectional view of a paper straw manufactured by a paper straw manufacturing system related to the present invention. [Figure 2] 1 is a schematic diagram of a paper straw manufacturing system related to the present invention. [Figure 3] 1 illustrates an area in which a heater is provided in a paper straw manufacturing system related to the present invention. [Figure 4] FIG. 1 is a side view of a paper band of a paper straw related to the present invention. [Figure 5] 1 illustrates a heater in a paper straw manufacturing system related to the present invention. [Figure 6] This relates to yet another embodiment of a paper straw manufacturing system related to the present invention. [Figure 7] This relates to yet another embodiment of a paper straw manufacturing system related to the present invention. [Figure 8] 1 illustrates an area in a paper straw manufacturing system related to the present invention where a roll installation section is provided. [Figure 9] 1 illustrates an area where a cutting section is provided in a paper straw manufacturing system related to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0046] Hereinafter, the embodiments disclosed herein will be described in detail with reference to the accompanying drawings. Identical or similar components will be designated by the same reference numerals regardless of the drawing numbers, and redundant descriptions thereof will be omitted. The suffixes "module" and "unit" used in the following description are given solely for the convenience of drafting the specification, or are used interchangeably, and do not have any distinct meanings or functions. Furthermore, in describing the embodiments disclosed herein, if a detailed description of related publicly known technology is deemed to obscure the gist of the embodiments disclosed herein, such detailed description will be omitted. Furthermore, the accompanying drawings are provided solely to facilitate understanding of the embodiments disclosed herein, and the technical concepts disclosed herein should not be limited by the accompanying drawings, and all modifications, equivalents, and alternatives within the concept and technical scope of the present invention should be understood to be included.

[0047] FIG. 1 is a front view and an enlarged partial longitudinal cross-section of a paper straw 1 manufactured by a paper straw manufacturing system 100 related to the present invention, FIG. 2 is a schematic diagram of the paper straw manufacturing system 100 related to the present invention, and FIG. 3 illustrates the area in which a heater 120 is provided in the paper straw manufacturing system 100 related to the present invention.

[0048] The paper straw manufacturing system 100 of the present invention refers to a collection of at least one configuration, member, or device for producing paper straws 1. The paper straw manufacturing system 100 of the present invention is not required to be composed of a single device, and therefore, the configuration included in the paper straw manufacturing system 100 can include multiple physically separated devices.

[0049] Briefly, the paper straw manufacturing system 100 of the present invention can include a roll 2, a core rod 110, a heater 120, a belt 130, a moving guide unit 140, and a cutting unit 150. A paper band 3 wound around the roll 2 is the raw material for the paper straws 1, and the remaining components operate so that the paper band 3 can be formed into the paper straws 1.

[0050] The paper straw 1 is manufactured by a method in which a paper band 3 is wound and fixed. The paper straw 1 can be formed of multiple layers of paper, with one layer being formed by winding a single continuous paper band 3 multiple times in a spiral shape. More specifically, the paper band 3 is wound and fixed around a core rod 110, and after being fixed, it is released from the core rod 110 and takes on the shape of the paper straw 1, i.e., a cylindrical shape with a hollow in the longitudinal direction.

[0051] When the paper straw 1 is formed as multiple layers of paper, the rigidity of the paper straw 1 is increased, which helps to maintain the shape of the paper straw 1. In addition, the adjacent layers of paper bands 3 also serve to fill gaps that may occur when the paper band 3 is repeatedly wound in a spiral shape.

[0052] The more layers the paper straw 1 is formed into, the more rigid it becomes and the less likely gaps will occur, but this increases manufacturing costs, increases weight, and reduces the diameter of the space through which the beverage is drawn up, so a good compromise must be found.

[0053] Considering these points, it is preferable that the paper straw 1 be made up of three layers. A paper straw 1 made up of three layers has the advantage that it significantly reduces the probability of gaps occurring compared to a paper straw 1 made up of two layers, and also ensures sufficient rigidity.

[0054] The following explanation is based on the assumption that the paper straw 1 is made up of three layers. However, other features of the paper straw manufacturing system 100 of the present invention are based on the assumption that the paper straw 1 is made up of multiple layers, and do not necessarily require that the paper straw 1 be made up of three layers.

[0055] In a three-layer paper straw 1, the paper band 3 that constitutes the innermost layer is defined as the inner paper 1a, the paper band 3 that constitutes the outermost layer is defined as the outer paper 1c, and the paper band 3 between the inner paper 1a and the outer paper 1c is defined as the middle paper 1b.

[0056] Furthermore, to further enhance the durability of the paper straw 1, the boundaries 3x, 3y, and 3z of the paper bands of each layer may be offset. The boundaries (gaps or overlapping areas 3x, 3y, and 3z) created by spirally winding each paper band 3a, 3b, and 3c are relatively weak areas. Therefore, it is preferable that these boundary areas 3x, 3y, and 3z are offset from each other rather than overlapping in a straight line in the stacking direction. Therefore, the center line CB of the paper band 3b of the inner paper 1b may be offset to one side from the center line CA of the paper band 3a of the inner paper 1a, and the center line CC of the paper band 3c of the outer paper 1c may be offset to the other side from the center line CA of the paper band 3a of the inner paper 1a. In this case, the degree of offset is less than half the width of the paper band 3. If the degree of offset is greater than half the width of the paper band 3, the paper bands 3 will be closer to the adjacent paper bands in the spiral pattern, making this feature meaningless.

[0057] The paper bands 3 corresponding to each layer of the paper straw 1 are formed by unwinding them from the respective rolls 2a, 2b, and 2c. The inner paper band 3a is formed from the inner paper roll 2a, the outer paper band 3c from the outer paper roll 2c, and the middle paper band 3b from the middle paper roll 2b.

[0058] The paper web 3 is unwound from the roll 2 and wound around a core rod 110. The outer circumferential surface of the core rod 110 becomes a mating surface that allows the paper web 3 to be wound into the shape of a straw. Therefore, the outer diameter of the core rod 110 corresponds to the inner diameter of the straw.

[0059] The core rod 110 is made of a metal material to ensure rigidity and heat resistance. The metal core rod 110 prevents deformation during the winding and advancement of the paper web 3 and minimizes sticking of the paper web 3.

[0060] The belt 130 presses the paper band 3 onto the core rod 110 so that the paper band 3 is tightly wound around the core rod 110. The paper band 3 pressed by the belt 130 is wound around the core rod 110 to form a preliminary straw 1'. The preliminary straw 1' is defined as the paper band 3 after it has been wound around the core rod 110 and before it has been cut by the cutting unit 150.

[0061] The preliminary straw 1' is advanced in one longitudinal direction of the core rod 110 by the movement guide unit 140, and the advanced preliminary straw 1' is cut by the cutting unit 150 to form the paper straw 1.

[0062] The greatest feature of the paper straw manufacturing system 100 of the present invention is that the paper web 3 in the roll 2 state has a solidified thermal adhesive coating material 11, and is fixed into a straw shape by receiving heat during the process of winding it around the core rod 110. In other words, while conventional manufacturing systems first create the paper straw shape, then apply glue and dry it, the present invention omits the drying process. This saves time required for drying in the conventional system, and also eliminates the need for a drying means.

[0063] The heater 120 heats the paper web 3 wound around the core rod 110. The thermal adhesive coating material 11 on the heated paper web 3 instantly melts and hardens, providing adhesive strength to fix the paper web 3 wound into the straw shape.

[0064] FIG. 4 is a schematic side view of each of the paper strips 3a, 3b, and 3c of the paper straw manufacturing system 100 related to the present invention.

[0065] The thermal adhesive coating material 11 may be an acrylate-based heat-sealable material. In particular, the thermal adhesive coating material 11 may have the properties of a water-based coating agent as an environmentally friendly material. As a representative example, the thermal adhesive coating material 11 may be one of the RP-series from rePAPER, and in particular, RP200 may be a suitable form.

[0066] The thermal adhesive coating material 11 may be provided on at least one surface of the paper strip 3. After the thermal adhesive coating material 11 is applied to at least one surface of the paper strip 3, the paper strip 3 is cured and wound into a roll 2 for storage.

[0067] The thermal adhesive coating material 11 may be provided on at least one surface of each of the inner web 3a, the middle web 3b, and the outer web 3c. When the thermal adhesive coating material 11 of a web 3 is heated and cured, it adheres to the adjacent web 3 facing it. On the other hand, the thermal adhesive coating material 11 that does not face the web 3 only functions as a coating. That is, even if the same thermal adhesive coating material 11 has a counterpart, it performs both the adhesive and coating functions, and when it does not have a counterpart, it only functions as a coating. That is, when the thermal adhesive coating material 11 is heated and cured in contact with the adjacent web 3, it adheres to and coats the adjacent web 3, and when it is heated and cured in an external environment without contacting the web 3, it performs the coating function. In this case, the coating may be a waterproof coating that is water-resistant and prevents the web 3 from being easily wetted or soaked by external liquids.

[0068] The thermal adhesive coating material 11 may be provided on the outer surface of the inner web 3a, the inner and outer surfaces of the intermediate web 3b, and the inner and outer surfaces of the outer web 3c. The inner web 3a and the intermediate web 3b are bonded to each other by the thermal adhesive coating material 11 provided on the outer surface of the inner web 3a and the inner surface of the intermediate web 3b. The intermediate web 3b and the outer web 3c are bonded to each other by the thermal adhesive coating material 11 provided on the outer surface of the intermediate web 3b and the inner surface of the outer web 3c. In other words, two adjacent webs 3 are bonded by heating and pressing two thermal adhesive coating materials 11 provided on opposing surfaces. Heating and curing the thermal adhesive coating material 11 when provided on both opposing surfaces of the webs 3 improves adhesion reliability, which also contributes to increased production speed. For example, providing 5 gsm of thermal adhesive coating material 11 on each of the two opposing paper strips 3 is more advantageous in terms of adhesive reliability and production speed than providing 10 gsm of thermal adhesive coating material 11 on only one side of the two paper strips 3 and not providing any coating on the other side, which is then heated and cured.

[0069] However, if desired, only one of the two surfaces may be provided with the thermal adhesive coating material 11 .

[0070] The thermal adhesive coating material 11 on the outer surface of the outer web 3c is water-resistant and performs a coating function, preventing liquids such as beverages from seeping into the paper straw 1. On the other hand, the thermal adhesive coating material 11 is not provided on the inner surface of the inner web 3a, which is intended to prevent the inner web 3a, which directly faces the core rod 110, from sticking to itself. In other words, the thermal adhesive coating material 11 is not provided on the inner surface of the web of the inner paper portion 4 (corresponding to the inner web 3a), but is provided on the outer surface of the web (corresponding to the outer web 3c) that forms the outermost layer of the outer paper portion 5, and between two adjacent webs (inner web 3a and inner web 3b, and inner web 3b and outer web 3c). The thermal adhesive coating material 11 performs a coating function on the outer surface of the web that forms the outermost layer of the outer paper portion 5, and between two adjacent webs, the thermal adhesive coating material 11 performs both a coating and adhesive function.

[0071] Each paper strip 3 may have a mass per unit area of ​​40 gsm to 120 gsm, which may be applied differently depending on the dimensions of the paper straw 1, etc.

[0072] It is advantageous for the outer paper band 3c to have a smaller mass per unit area than the middle paper band 3b or the inner paper band 3a. This is because the outer paper band 3c is the part that comes into contact with the user's mouth as a straw, and if it is thin, protruding areas due to overlapping etc. will be minimized, which will not give the user a foreign body sensation. Preferably, the mass ratio per unit area of ​​the paper band (3, i.e., outer paper band 3c) that forms the outermost layer of the outer paper portion 5 to the paper band (3, i.e., inner paper band 3a) of the inner paper portion 4 can be 0.5 to 0.8.

[0073] The amount of thermal adhesive coating material 11 applied to one side of the paper web 3 can be 1 gsm to 15 gsm. The amount of thermal adhesive coating material 11 applied is an important factor for proper adhesive reliability and waterproof performance. If an insufficient amount is applied, the adhesive and coating performance cannot be achieved, while using as little amount as possible helps reduce manufacturing costs.

[0074] In particular, to ensure reliable adhesion between adjacent paper strips 3 of different layers, a thermal adhesive coating material 11 of 5 gsm to 10 gsm may be provided on both sides of the paper strip 3. Since the thermal adhesive coating material 11 for adhesion is provided on each of the opposing surfaces of two opposing paper strips 3, when two paper strips 3 are joined together, a thermal adhesive coating material 11 of 10 gsm to 20 gsm is provided between them.

[0075] The thermal adhesive coating material 11 provided on one side of the paper web 3 for adhesion may vary depending on the paper material. For kraft paper, which has a relatively loose paper structure, the thickness may be 7 gsm to 10 gsm, and for regular paper, which has a relatively dense paper structure, the thickness may be 5 gsm to 7 gsm.

[0076] On the other hand, since the outer surface of the outer web 3c only functions as a coating and not as an adhesive, it is acceptable to provide a smaller amount of the thermal adhesive coating material 11 on the outer surface of the outer web 3c. For example, the thickness of the thermal adhesive coating material 11 on the outer surface of the outer web 3c may be 1 gsm to 3 gsm.

[0077] In terms of ratio, the mass ratio per unit area of ​​the thermal adhesive coating material 11 provided on the outer surface of the paper strip 3 forming the outermost layer to the thermal adhesive coating material 11 provided between two adjacent paper strips 3 is 0.1 to 0.6.

[0078] Referring again to FIG. 3, to prevent the inner surface of the inner web 3a from sticking to the core rod 110, the oil supplier 111 applies oil to the inner surface of the inner web 3a, which directly contacts the core rod 110. The oil supplier 111 can apply oil to the inner web 3a from a point on the core rod 110 before the web 3 is wound around it. The oil can be applied periodically in a fixed amount. Even when the oiled inner web 3a is wound around the core rod 110, a film forms between the two components, minimizing friction between the spare straw 1' and the core rod 110. The oil can particularly include edible soybean oil, which takes into consideration the environment in which the paper straw 1 is used.

[0079] To dispense oil, the inner web 3a can be inserted into the core rod 110 with its inner surface facing upward. That is, the inner web 3a, the middle web 3b, and the outer web 3c can be inserted into the core rod 110 in order from the top, and then wound around the bottom of the core rod 110.

[0080] In some cases, the inner paper band 3b may be omitted, and the paper straw 1 may be formed using only the inner paper band 3a and the outer paper band 3c. In this case, the characteristics of the inner paper band 3a and the outer paper band 3c described above are maintained.

[0081] 5 is a diagram illustrating the heater 120 of the paper straw manufacturing system 100 associated with the present invention. Please refer to both FIGS. 1 to 4.

[0082] The heater 120 heats the paper strip 3 wound around the core rod 110, more specifically, the thermal adhesive coating material 11 provided on the paper strip 3, so that two adjacent paper strips 3 can be fixed and bonded to each other.

[0083] The heater 120 heats the paper web 3 at a point before the point where the paper web 3 starts to be wound around the core rod 110, so that the paper web 3 is wound in a heated state around the core rod 110. If the heating is performed at a point far before the winding point, the paper web 3 may be wound around the core rod 110 in a state where the heated thermal adhesive coating material 11 has cooled. Therefore, it is preferable that the heater 120 be provided just before the point where the paper web 3 starts to be wound around the core rod 110.

[0084] There are several ways to heat the paper web 3, but the heater 120 can be driven as a hot air supply method. Heating the paper web 3 using the hot air supply method makes it easy to heat an object that is far away from the heat source, and it not only prevents the object from coming into direct contact with the heat source and being burned or scorched, but also allows the object to be heated over a relatively large area.

[0085] The heater 120 includes a hot air supplying surface 121 corresponding to at least one side of the paper web 3. The hot air supplying surface 121 corresponding to one paper web 3 may be provided on both sides of the paper web 3. It is preferable that the hot air supplying surface 121 is provided so as to face at least the side of the paper web 3 on which the thermal adhesive coating material 11 is provided.

[0086] The hot air supply surface 121 may include porous ducts 122 through which hot air is dispersed and supplied. The porous ducts 122 allow the paper web 3 passing through the hot air supply surface 121 to supply heat uniformly and continuously to the widest possible area.

[0087] When the inner web 3a, the middle web 3b, and the outer web 3c flow into the core rod 110, the heater 120 may form three slits 123 to allow the three webs 3 to pass through. In particular, each slit 123 may be defined as a space between two opposing hot air supply surfaces 121.

[0088] Each slit 123 is formed to have a width and thickness that are sufficiently wider than the width and thickness of the paper strip 3, ensuring ample space so that the paper strip 3 flowing in to be wound around the core rod 110 can move in the width direction or thickness direction within the slit 123 and be grasped at an appropriate position.

[0089] In this case, the shape of the hot air supplying surface 121 may correspond to the paper web 3 or the space occupied by the paper web 3. This increases thermal efficiency and improves the bonding reliability of the paper web 3. More specifically, the hot air supplying surface 121 may have a trapezoidal shape that narrows in width in the direction of travel of the paper web 3. This is because the inner paper web 3a, middle paper web 3b, and outer paper web 3c are wound around the core rod 110 in an overlapping manner, and are arranged to gather together as they approach the core rod 110.

[0090] The longer the heater 120, the greater the heat can be supplied simultaneously to a wider area of ​​the paper web 3. Another advantage is that the speed at which the preliminary straw 1' moves along the core rod 110 can be increased. The length of the heater 120 in the direction in which the paper web 3 passes is preferably 30 cm to 45 cm. This value reflects the above-mentioned factors and the speed at which the preliminary straw 1' passes along the core rod 110, which is 50 meters / min to 65 meters / min. If the movement speed of the preliminary straw 1' is increased, the length of the heater 120 can be increased, and if the movement speed is decreased, the length of the heater 120 can be decreased.

[0091] At least one side of the heater 120 may have an openable / closable member 124 so that the paper web 3 can be easily positioned in the slit 123 of the heater 120 during the initial setting process. The openable / closable member 124 is provided with a rotatable hinge 1241, allowing the paper web 3 to be initially inserted, and the same member as in other areas of the heater 120 can be used to reduce heat loss. The openable / closable member 124 allows the paper web 3 to be easily positioned in the slit 123 while preventing heat from being lost to the sides during the heating process.

[0092] FIG. 6 relates to yet another embodiment of a paper straw manufacturing system 100 related to the present invention.

[0093] Unlike the heater 120 described above, the heater 120 may be provided in a manner that supplies hot air only from one side of the paper web 3 inserted into the core rod 110. The heater 120 of this embodiment may be provided independently or together with the heater 120 of the previous embodiment to further improve adhesion reliability.

[0094] 5 and 6 may include a high-pressure blower that generates a fluid, and the generated fluid passes through an air hose 126 and exits the hot air supply surface 121 or an outlet. An air heating element 129 is provided immediately before the hot air supply surface 121 or the outlet to raise the temperature of the fluid.

[0095] The heater 120 may include a temperature controller 128 that adjusts the output based on the measured temperature so that the fluid can be supplied at a constant or desired temperature. The optimum temperature for the heater 120 to supply heat by the temperature controller 128 is 350°C to 380°C. This is due to the melting point of the thermal adhesive coating material 11. Therefore, a paper straw 1 made using the thermal adhesive coating material 11 will not melt even when immersed in hot water, for example, 100°C. In addition, high-temperature heating simultaneously achieves a sterilization or disinfection effect, making it hygienic.

[0096] FIG. 7 relates to yet another embodiment of a paper straw manufacturing system 100 related to the present invention.

[0097] Furthermore, the core rod 110 itself may independently or additionally function as the heater 120. One region of the core rod 110 may be made of a heat-generating material to help heat and fix the paper web 3 as it advances. For example, one region of the core rod 110 may include a nickel heating wire 112, which may be configured as a circuit and heated by applying an electric current.

[0098] The heating method of the core rod 110 can be used in conjunction with the heating method of the two heaters 120 described above.

[0099] The heatable core rod 110 may also include a temperature measurement and temperature controller 128 to maintain a desired temperature.

[0100] Referring again to FIG. 3 or 6, the belt 130 applies pressure to the paper band 3 so that it is wound around the core rod 110 in the shape of a paper straw 1. The belt 130 grips the paper band 3 so that the paper band 3 is twisted as it is wound around the core rod 110. For this reason, the belt 130 is required to twist the paper band 3. For this reason, the belt 130 forms a closed loop, and the closed loop belt 130 is fixed to two cylinders 131 provided on both sides of the core rod 110 and moves by rotating together with the rotation of the cylinders 131. The direction of movement of the belt 130 is along the longitudinal direction of the belt 130, so that the movement of the belt 130 has a circulating form along a closed loop path.

[0101] More specifically, the belt 130 is wound around and fixed to the outer periphery of each of the two cylinders 131, and is twisted once to form an intersection line 1301, so that the belt 130 has an overall "8" shape. The belt 130 twisted in the "8" shape has a larger contact area with the cylinders 131 than the untwisted belt 130, and can generate strong tension, which prevents the belt 130 from spinning freely.

[0102] The cylinders 131 are rotated by a motor, and the rotating cylinders 131 move the belts 130. Due to the movement of the belts 130, the two cylinders 131 rotate in the same direction.

[0103] One side 1301a of the crossing line 1301 of the belt 130 moves while being wound around the core rod 110 at least once, thereby moving in close contact with the core rod 110, which allows the belt 130 to more effectively twist the paper web 3. The belt 130 wound around the core rod 110 allows the core rod 110 to apply pressure to the entire circumference of the paper web 3.

[0104] The direction of movement of the belt 130 can be the same as the direction in which the paper web 3 is wound around the core rod 110. As the paper web 3 moves in one direction while being wound around the core rod 110, the paper web 3 is subjected to a force that twists it in a diagonal direction.

[0105] As described above, the paper web 3 unwound from the roll 2 passes through the slit 123 of the heater 120 and is then wound around the core rod 110 .

[0106] At this time, the paper strip 3 must be inserted into the heater 120, the slit 123, and the core rod 110 at the appropriate position. This is not only to prevent the paper strip 3 from interfering with the heater 120, but also to ensure that the paper strip 3 is wound around the core rod 110 in the appropriate pattern to form the intended paper straw 1 shape.

[0107] If the paper web 3 unwound from the roll 2 is fed directly into the core rod 110 without any additional structure, the feeding height or left / right position of the paper web 3 will not be constant depending on the degree to which the roll 2 is unwound, and the paper web 3 will bend during the feeding process.

[0108] The input position adjuster 180 determines the position of the paper web 3 to be input to the core rod 110. In addition, the input position adjuster 180 increases the tension of the paper web 3 so that the paper web 3 is taut and wound around the core rod 110. To increase the tension, the input position adjuster 180 includes two guide members 181 so that the paper web 3 can be input by passing between the two guide members 181.

[0109] The insertion position adjustment unit 180 is variably provided so as to be movable in the thickness direction (vertical direction in FIG. 3) and width direction (horizontal direction in FIG. 3) of the paper web 3, and the insertion point of the paper web 3 can be adjusted as needed.

[0110] Assuming that the web 3 is fed horizontally, the left-right adjustment of the feed position adjustment unit 180 affects the angle of the web 3 wound around the core rod 110 and the spacing between the wound webs 3. For example, by adjusting the feed position adjustment unit 180 left-right, one side of the inner web 3a in the width direction can be wound so as to be spaced apart from the other side of the next turn of the inner web 3a, creating a certain gap (S), or so as to be wound almost adjacent to it. If the width of the inner web 3b is greater than that of the inner web 3a and the width of the outer web 3c is greater than that of the inner web 3b, the inner web 3b can be wound so as to overlap each other partially (L1), and the outer web 3c can also be wound so as to overlap each other partially (L2) (see FIG. 1). The inner paper bands 3a are wound so as not to overlap each other, preventing the thickness of the paper straw 1 from increasing or interfering with consistent adhesion, and the overlap of the middle paper band 3b and the outer paper band 3c prevents gaps from forming in the paper straw 1.

[0111] The outer portion 5, that is, the overlapping areas of the inner belt 3b and the outer belt 3c, are provided with a thermal adhesive coating material 11, so that the overlapping areas are also adhered to each other to form a fixing force.

[0112] In some cases, the inner paper band 3a, the middle paper band 3b, and the outer paper band 3c may all be generated so that they do not overlap with each other. In this case, it is possible to prevent the generation of protruding areas (e.g., L1 or L2) on the paper straw 1.

[0113] In one preferred embodiment, the width of the inner strip 3a may be 13.5 mm, the width of the middle strip 3b may be 14 mm, and the width of the outer strip 3c may be 15 mm.

[0114] However, this can vary depending on the specifications of the paper straw 1, i.e., the diameter and length of the paper straw 1, as well as the material. The width of the paper band 3 can vary from 10 mm to 30 mm.

[0115] FIG. 8 illustrates the area in which the roll installation section 160 is provided in the paper straw manufacturing system 100 related to the present invention.

[0116] The roll installation unit 160 installs the paper band 3 provided in the form of a roll 2 before being fed into the core rod 110. When a paper straw 1 is formed with three layers of paper band 3, the roll installation unit 160 supplies the paper band 3 from each of the inner paper roll 2a, the middle paper roll 2b, and the outer paper roll 2c.

[0117] The roll installation unit 160 may further include a guide roller 161. The guide roller 161 is provided between the feed position adjustment unit 180 and the roll 2 based on the movement path of the web 3. The web 3 is unwound from the roll 2 and passes through the guide roller 161 to advance to the feed position adjustment unit 180. The guide roller 161 not only serves to roughly align the direction of the web 3 so that it can be fed from the correct position toward the feed position adjustment unit 180, but also preliminarily unwinds the web 3 to prevent the roll 2 from suddenly running out.

[0118] To ensure the expansion path, guide rollers 161 may be provided on both sides. In particular, by providing a plurality of guide rollers 161 on one side and a plurality of guide rollers 161 on the other side, the preliminarily unwound paper web 3 can be advanced back and forth in a zigzag pattern between one side and the other side.

[0119] As described above, the guide roller 161 ensures that the paper web 3 is fully unwound before being fed onto the core rod 110. Therefore, even if the paper web 3 of the roll 2 is completely consumed, there is sufficient time to feed the next roll 2, i.e., the spare roll 2'. In particular, when the end point of the used roll 2, i.e., the inner end of the paper web 3, is connected to the start point of the spare roll 2', i.e., the outer end of the paper web 3, around the time the used roll 2 is completely consumed, the paper web 3 can be continuously fed onto the core rod 110 without any additional measures or time delays. The guide roller 161 ensures that the two paper webs 3 can be connected.

[0120] In particular, the end of the roll 2 and the beginning of the spare roll 2' can be connected by heating and pressing using the characteristics of the thermal adhesive coating material 11 provided on the paper web 3. This prevents the paper web 3 from breaking or creating dead areas connected by other methods, enabling continuous production and preventing waste of resources.

[0121] The two paper webs 3 of the roll 2 and the spare roll 2′ may be connected by a connecting part 170. The connecting part 170 may include a heating part 171 that generates heat to heat the thermal adhesive coating material 11 of the two paper webs 3, and a pressing part 172 that presses and presses the heated paper webs 3. The heating part 171 and the pressing part 172 may be integrally formed to constitute the connecting part 170.

[0122] The pressing unit 172 has two pressing members provided on both sides so that the paper web 3 and the spare paper web 3' can pass between them, and the two pressing members can selectively approach each other to press the paper web 3. One of the pressing members can be the heating unit 171 described above. The heated and pressed paper webs 3 are connected to each other by the thermal adhesive coating material 11.

[0123] In addition, the gap between at least two of the guide rollers 161 corresponding to one side and the other side of the plurality of guide rollers 161 can be selectively narrowed. This is because, even when the ends of the two paper webs 3 are connected by heating and pressing using the connecting part 170, the paper webs 3 are continuously fed, so that the connecting part of the two paper webs 3 does not move to the feeding point.

[0124] The narrowing of the guide rollers 161 on one side and the other side can be realized by an elastic part 163 having a restoring force like a spring structure. That is, even if the gap narrows momentarily due to the pulling of the paper web 3, the restoring force of the elastic part 163 provided on at least one side restores the gap between the two guide rollers 161 to the original position, so that the gap can return to the normal state.

[0125] FIG. 9 illustrates the area where the cutting section 150 is provided in the paper straw manufacturing system 100 related to the present invention.

[0126] The preliminary straw 1' wound around the core rod 110 is continuously advanced in one direction by the moving guide unit 140. This advancement direction is the opposite side of the longitudinal direction of the core rod 110 from the side where the paper strip 3 to be inserted is located.

[0127] The advanced spare straws 1' are cut to a certain length by the cutting unit 150, forming the spare straws 1' into straws. The cutting unit 150 may include a plurality of blades 151 spaced apart at regular intervals, which are embodied as rotating circular blades 151 that perform a reciprocating motion to repeatedly produce a plurality of straws from the supplied spare straws 1'. As the number of blades 151 increases, the number of paper straws 1 that can be produced at one time increases. This means that the relative movement speed of the spare straws 1' can be slowed down, which in turn reduces the load on the drive device required to move the spare straws 1'.

[0128] The formed straws can be moved and stacked through a conveyor. The paper straws 1 of the present invention do not require a drying process, so they can be immediately stacked by a conveyor and can also be immediately packaged, improving production efficiency.

[0129] The paper straw manufacturing method for manufacturing paper straws 1 using the paper straw manufacturing system 100 of the present invention will be described below based on the paper band advancement order. Please refer to all of Figures 1 to 9.

[0130] In the initial state, multiple paper webs 3a, 3b, and 3c are unwound from multiple rolls 2a, 2b, and 2c, respectively. At this time, the multiple rolls 2a, 2b, and 2c are advanced while installed in a roll installation section 160. The paper web 3 unwound from the roll 2 is preliminarily unwound through a guide roller 161 of the roll installation section 160 and then advances toward the core rod 110.

[0131] Before being wound around the core rod 110 by the belt 130, each unwound paper band 3a, 3b, 3c undergoes a process of being heated by the heater 120. Among these, the inner surface of the paper band 3, which will be the innermost layer of the straw 1 (or spare straw 1'), additionally undergoes a process of applying oil. The oil application process is performed before the heating process by the heater 120, but if necessary, it can be performed before being wound around the core rod 110 after the heating process.

[0132] Before passing through the heater 120, the paper web 3 passes through the feed position adjustment unit 180, which allows the position of the paper web 3 to be determined before being fed into the heater 120 and the core rod 110. The feed position adjustment unit 180 is provided before the heater 120 to prevent the paper web 3 from interfering with the slit 123 of the heater 120, resulting in unintended deformation of the position of the paper web 3 or accidental heating.

[0133] At this time, the process of applying oil to the inner surface of the innermost paper web 3 can be performed at the same point as the input position adjusting unit 180.

[0134] The multiple paper strips 3 that have passed through the heater 120 are wound around the core rod 110 so that they overlap each other in at least one area. For example, the inner paper strip 3a, the middle paper strip 3b, and the outer paper strip 3c are wound around the core rod 110 so that they overlap appropriately, which can be adjusted by the above-mentioned input position adjustment unit 180. When the multiple paper strips 3a, 3b, and 3c are formed into a straw 1, the boundaries of each paper strip 3a, 3b, and 3c are not positioned on the same line, which ensures the rigidity of the straw 1 and minimizes the possibility of liquid intrusion.

[0135] The paper strip 3 wound around the core rod 110 forms a spare straw 1', and the spare straw 1' moves along the longitudinal direction of the core rod 110 by the movement guide part 140.

[0136] The advanced preliminary straw 1' is cut by the cutting unit 150 to form the straw 1. The cutting unit 150 has a plurality of blades 151, so that a plurality of straws 1 can be simultaneously formed by a single operation of the cutting unit 150.

[0137] The formed straws 1 can be moved and stacked by a conveyor. The stacked straws 1 can then go through a packaging process to complete the manufacturing process.

[0138] Additionally, a spare roll 2' may be provided to prevent discontinuous halt in supply of the paper web 3 when the roll 2 is exhausted. The spare roll 2' may be installed together with the roll 2 in the roll installation section 160. The outer end of the paper web 3 of the spare roll 2' may be connected to the inner end of the paper web 3 of the exhausted roll 2 so that the paper web 3 can be continuously fed onto the core rod 110. In particular, to eliminate dead areas of the paper web 3 and utilize the advantages of the thermal adhesive coating material 11, the outer end of the paper web 3' of the spare roll 2' and the inner end of the paper web 3 of the exhausted roll 2 may be connected by heating and pressing.

[0139] The heating and pressing of the two paper webs 3 , 3 ′ can be performed before they are fed into the guide rollers 161 of the roll mounting section 160 .

[0140] It will be apparent to those of ordinary skill in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the present invention.

[0141] The above detailed description should not be construed as limiting in all respects, but should be considered as illustrative. The scope of the present invention should be determined by reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the present invention are included in the scope of the present invention. [Industrial Applicability]

[0142] The aforementioned features may be applied in part or in whole to the paper straw manufacturing method or paper straw manufacturing system in this industry.

Claims

1. unwinding a plurality of paper webs, each of which has a thermal adhesive coating material on at least one surface, from a plurality of rolls; heating the unwound paper strips by a heater; the heated paper strips are wound around a core rod by a belt to form preliminary straws; The preliminary straw is advanced along the longitudinal direction of the core rod by a moving guide part; The advanced preliminary straw is cut by a cutting section to form a straw, Among the plurality of paper bands, an inner surface of the paper band wound in contact with the outer circumferential surface of the core rod is not provided with a thermal adhesive coating material, The inner surface of the paper band wound in contact with the outer circumferential surface of the core rod receives oil dropped by an oil supply unit and then is introduced into the core rod, The step of heating the unwound paper strips by the heater comprises: a hot air supplying surface included in the heater, the hot air supplying surface being formed to face both sides of each of the plurality of paper strips and having a trapezoidal shape whose width narrows along the traveling direction of each of the plurality of paper strips, and heating the plurality of paper strips with hot air supplied through the hot air supplying surface.

2. the heated paper bands include an inner paper band, a middle paper band, and an outer paper band; The paper straw manufacturing method according to claim 1 , wherein the inner paper band, the middle paper band, and the outer paper band are wound around the core rod with at least one region overlapping each other.

3. 2. The paper straw manufacturing method of claim 1, wherein the heater is heated to 350 to 380 degrees.

4. Before the step of heating the unwound paper strips by a heater, The method for manufacturing paper straws according to claim 1, further comprising a step of pre-unwinding the paper band by an expanding guide roller.

5. 5. The method for manufacturing paper straws according to claim 4, wherein the inner end of the paper band wound on the roll and the outer end of the paper band wound on the spare roll are heated and pressed together to form a continuous paper band.

6. After the straw is formed, the formed straws are moved and stacked by a conveyor; The paper straw manufacturing method of claim 1 , further comprising the step of: packaging the stacked straws.

7. 2. The paper straw manufacturing method of claim 1, wherein the belt forms a closed loop, the belt is installed across two cylinders provided on both sides of the core rod, and the two cylinders rotate to cause the belt to press the paper band.

8. 8. The method for manufacturing paper straws according to claim 7, wherein the belt is wound around the outer circumferential surfaces of the two cylinders to form an "8" shape, and one side of the intersection line is wound around the core rod once.

9. 2. The method for manufacturing paper straws according to claim 1, wherein the method does not include a step of drying the preliminary straws or the formed straws after the step of advancing the preliminary straws or the step of forming the straws.

10. a plurality of rolls comprising a plurality of paper strips each having a thermal adhesive coating material on at least one surface thereof; a core rod around which the plurality of paper strips unwound from the plurality of rolls are wound; a heater for heating the thermal adhesive coating material of the plurality of paper webs; a belt that twists the plurality of paper bands around the core rod to form spare straws; A movement guide unit that advances the spare straw along the longitudinal direction of the core rod; a cutting section for cutting the advanced preliminary straw to form a straw; an oil supply unit that drops oil onto the inner surface of the paper web that directly contacts the core rod, The heater includes a hot air supply surface formed to face both sides of each of the plurality of paper webs, The hot air supply surface is provided with a porous duct for dispersing and supplying hot air, The hot air supplying surface is provided on both sides of each of the plurality of paper webs, The hot air supply surface has a trapezoidal shape whose width narrows along the direction of travel of each of the plurality of paper webs, The belt twists a plurality of paper bands around the core rod to form the preliminary straws; In the paper straw manufacturing system, the inner surface of the paper strips that directly face the core rod is not provided with a thermal adhesive coating material, and is fed into the core rod after receiving oil dropped by the oil supply unit.

11. The paper straw manufacturing system according to claim 10, wherein the two hot air supplying surfaces provided on both sides of each of the plurality of paper bands form a slit between them through which the paper band passes.

12. 11. The paper straw manufacturing system of claim 10, wherein the heater has a length of 30 cm to 45 cm depending on the direction in which the paper strip passes, and the speed at which the paper strip is fed is 50 meters / min to 65 meters / min.

13. The paper straw manufacturing system according to claim 10, further comprising an input position adjustment unit that determines the position of the paper strip to be input to the core rod and increases the tension.

14. The paper straw manufacturing system according to claim 13, wherein the input position adjustment unit is variably provided so as to be movable in the thickness direction and width direction of the paper strip.

15. The roll is An inner paper roll provided with an inner paper band corresponding to the inner paper of the paper straw; A paper roll equipped with a paper strip that corresponds to the paper inside the paper straw; The paper straw manufacturing system of claim 10, further comprising: an outer paper roll provided with an outer paper band corresponding to the outer paper of the paper straw.

16. the widths of the inner band, the middle band, and the outer band increase sequentially; The roll-in roll further includes a roll-in position adjusting unit that determines the position of the roll-in roll to be inserted into the core rod and increases the tension of the roll-in roll, 16. The paper straw manufacturing system of claim 15, wherein one side of the inner paper strip in the width direction is wound around the core rod at a distance from the other side of the next turn to create a gap, and the feeding position adjustment unit adjusts the inner paper strip and the outer paper strip so that one side of the width direction at least partially overlaps the other side of the next turn.

17. The outer surface of the outer paper strip is provided with a thermal adhesive coating material of 1 gsm (mass per unit area) to 3 gsm, 17. The paper straw manufacturing system of claim 16, wherein the inner surface of the outer paper band, the inner and outer surfaces of the middle paper band, and the outer surface of the inner paper band are each provided with a thermal adhesive coating material at 5 gsm to 10 gsm.

18. The inner paper band, the middle paper band, and the outer paper band are made of kraft paper, 18. The paper straw manufacturing system of claim 17, wherein the inner surface of the outer paper band, the inner and outer surfaces of the middle paper band, and the outer surface of the inner paper band are each provided with a thermal adhesive coating material at 7 gsm to 10 gsm.

19. The paper straw manufacturing system of claim 10, further comprising a roll installation unit including a guide roller that allows the paper band of the roll to be preliminarily unwound and installed.

20. The guide rollers include a plurality of guide rollers provided on one side and a plurality of guide rollers provided on the other side, the plurality of guide rollers provided on one side and the plurality of guide rollers provided on the other side are configured so that the preliminarily unwound paper web passes through in a zigzag pattern; 20. The paper straw manufacturing system of claim 19, wherein any one of the plurality of guide rollers provided on one side and any one of the plurality of guide rollers provided on the other side are provided so that the distance between them is narrow.

21. a spare roll provided in a position subsequent to the roll; 21. The paper straw manufacturing system of claim 20, further comprising a connecting section that heats and presses an inner end of the paper strip of the roll and an outer end of the paper strip of the spare roll to form a continuous paper strip.

22. The method further includes a conveyor along which the formed straws are moved and loaded, 11. The paper straw manufacturing system of claim 10, which does not include a drying means for drying the preliminary straws or the formed straws.

23. The core rod further includes two cylinders, each of which is provided on either side of the core rod; 11. The paper straw manufacturing system of claim 10, wherein the belt forms a closed loop, the belt is installed across the two cylinders, and the two cylinders rotate to cause the belt to press the paper band.

24. 24. The paper straw manufacturing system of claim 23, wherein the belt is wound around the outer circumferential surfaces of the two cylinders to form an "8" shape, and one side of the intersection line is wound around the core rod once.

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