KR102641370B1 - Continuous manufacturing method of paper yarn for a coil ring or twin ring forming and paper yarn manufactured by such manufacturing method - Google Patents

Abstract

The present invention particularly relates to a continuous manufacturing method of paper yarn for easily forming coil rings or twin rings for binding through perforated holes such as notebooks, sketchbooks, calendars, and planners, and a paper product manufactured by such continuous manufacturing method. Pertaining to yarn, a method for continuously manufacturing paper yarn for coil ring or twin ring forming, comprising: forming a hot melt layer by applying hot melt to the inner surface of a paper roll base paper with flat both sides; Slitting the coated paper roll base paper to a predetermined width; And rotating the slitted paper roll base paper so that one end of the at least one slitted paper roll base paper in the predetermined width direction can be continuously wound toward the inside where the hot melt layer is formed and overlapped to converge and be fixed. At the same time, a method for continuously manufacturing paper yarn is disclosed, which includes forming the flat paper roll base paper into paper yarn with a circular cross section by performing a pultrusion process.

Description

Continuous manufacturing method of paper yarn for a coil ring or twin ring forming and paper yarn manufactured by such manufacturing method }

The present invention particularly relates to a continuous manufacturing method of paper yarn for easily forming coil rings or twin rings for binding through perforated holes such as notebooks, sketchbooks, calendars, and planners, and a paper product manufactured by such continuous manufacturing method. It's about yarn.

In general, there are two types of binding methods through perforated holes, such as conventional notebooks, sketchbooks, calendars, planners, etc., coil ring and twin ring, and are made of wire or plastic (PVC, PET). A ring was used. The binding method by coil ring is a method of binding diagonally by continuously inserting a row of coil rings into each perforated hole, and the binding method by twin ring is a method of binding by inserting two rows of rings into each perforated hole and engaging with each other. This is a method of binding in the form of a ring.

In this regard, Figure 6 shows the structure of a conventional coil ring 1 and a product bound by such a coil ring 1, and Figure 7 shows the structure of a conventional twin ring 2 and such a twin ring ( A product bound by 2) is shown.

Considering the recent trend/request for eco-friendly products and the problem of separate collection upon disposal, products using conventional wire or plastic rings as described above must be disposed of by separating the wire and plastic from the paper for recycling, etc. There was the inconvenience of doing so, and there was also the problem that the wire or plastic ring itself was not environmentally friendly.

Additionally, in the case of office and stationery products such as notebooks, sketchbooks, calendars, planners, etc. bound with wire or plastic rings, the ends of the wire or plastic protruding from both ends of the coil ring or twin ring of the product are sharp, causing damage when using the product. There was also the problem that safety accidents, such as hands being stabbed or cut, often occurred.

Accordingly, the present inventor replaced the material itself for forming coil rings or twin rings with paper yarn subjected to specific processing according to the present invention, so that the entire finished product is environmentally friendly and the inconvenience of separate discharge upon disposal can be resolved. In particular, the risk of safety accidents caused by the sharp ends of conventional wires or plastics has been eliminated, and the subsequent ring forming process is also simpler than before, making it possible to improve the efficiency of the entire manufacturing process and reduce costs. has led to the development of a continuous manufacturing method and paper-made yarn using such a continuous manufacturing method.

For reference, the prior art (Patent No. 10-1124063) discloses a product that can replace wire with paper, especially when binding with twin ring binding. However, the conventional paper products used in twin ring binding have a complicated production process and are difficult to produce continuously, so the manufacturing cost is very high, and when binding notebooks or books, they are completed by heat fusion, so a separate expensive machine is required. , the heat fusion process takes a considerable amount of time, resulting in a problem that significantly increases the bookbinding manufacturing cost or cost.

Republic of Korea Patent Publication No. 10-1124063 ‘Paper binder, and manufacturing system and manufacturing device thereof’

The purpose of the present invention is to use specially processed paper yarn as a coil ring or twin ring material instead of the conventional wire and plastic coil ring or twin ring, so that the entire finished product is environmentally friendly, and when discarded, a coil ring made of paper is used. Alternatively, the twin ring can be easily discharged without the cumbersome task of separately separating it, and in particular, the risk of safety accidents caused by the sharp ends of conventional wire or plastic can be eliminated, and it can be continuously manufactured through a series of sequential processes. Therefore, the manufacturing cost is low, and the subsequent coiling forming process is also simpler than before, so the aim is to provide a paper yarn and a manufacturing method thereof that can improve the efficiency of the entire manufacturing process and reduce costs.

One embodiment of the present invention for achieving the above object is a method of continuously manufacturing paper yarn for coil ring or twin ring forming, in which hot melt is applied to the inner surface of a paper roll base paper with flat sides on both sides to form a hot melt layer. forming a; Slitting the coated paper roll base paper to a predetermined width; And rotating the slitted paper roll base paper so that one end of the at least one slitted paper roll base paper in the predetermined width direction can be continuously wound toward the inside where the hot melt layer is formed and overlapped to converge and be fixed. At the same time, a method for continuously manufacturing paper yarn is disclosed, which includes forming the flat paper roll base paper into paper yarn with a circular cross section by performing a pultrusion process.

A method of continuously manufacturing paper yarn for coil ring or twin ring forming according to another embodiment of the present invention includes the steps of slitting a paper roll base paper with flat sides on both sides to a predetermined width; forming a hot melt layer by applying hot melt to the inner surface of the slitted paper roll base paper; And rotating the slitted paper roll base paper so that one end of the at least one slitted paper roll base paper in the predetermined width direction can be continuously wound toward the inside where the hot melt layer is formed and overlapped to converge and be fixed. At the same time, it includes the step of forming the flat paper roll base paper into paper yarn with a circular cross-section by performing a pultrusion process.

Preferably, in the rotation and pultrusion process, the hot melt layer fills the voids between the overlapping papers, adheres several layers of overlapping paper to each other, and the hot melt layer is formed between the overlapping papers. As it crystallizes, it is formed into rigid or hard paper yarn.

More preferably, the method further includes winding and storing the paper yarn.

Preferably, the method further includes selectively coating the outer surface of the paper roll base paper, the outer surface of the slitted paper roll base paper, or the outside of the paper yarn with a biodegradable, environmentally friendly water-soluble coating solution.

More preferably, the predetermined width of the paper roll base paper is 15 mm to 70 mm, and the thickness of the paper roll base paper is 20 μm to 60 μm.

Most preferably, the thickness of the hot melt layer is 20㎛ to 50㎛.

Preferably, the thickness ratio of the overlapping paper roll base paper and the hot melt layer is 1:0.5 to 1.

More preferably, the slitted paper roll base is rotated at 4 to 8 turns per 10 cm (4 to 8 turns/10 cm) and continuously formed into a paper yarn with a circular cross-section, and the diameter of the paper yarn is It is 1mm to 4mm.

Provided is a paper yarn manufactured by the above-described continuous manufacturing method of the paper yarn according to the present invention.

According to the present invention, the entire finished product, including the coil ring or twin ring, is environmentally friendly, and when discarded, it can be easily disposed of without the cumbersome task of separately separating the coil ring or twin ring made of paper, and in particular, the conventional wire or plastic The risk of safety accidents caused by sharp ends can be eliminated, and manufacturing costs can be significantly reduced because continuous manufacturing can be performed through a series of sequential processes. Furthermore, the subsequent ring forming process is also simpler than before, reducing the overall manufacturing process. Increased efficiency and cost savings can be achieved.

Figure 1 is a diagram illustrating a hot melt layer formed on the inner side of a paper roll base paper and a coating layer formed on the outer side according to an embodiment of the present invention.
Figure 2 is a diagram showing slitting a paper roll base paper on which a hot melt layer and a coating layer are formed to a predetermined width according to an embodiment of the present invention.
Figure 3 shows, according to an embodiment of the present invention, one end of at least one slitted paper roll base paper in the predetermined width direction is continuously wound toward the inside where the hot melt layer is formed, overlaps, converges, and is fixed. It is a drawing.
Figure 4 shows, according to an embodiment of the present invention, the slit paper roll base paper is rotated and pultruded at the same time so that the paper roll base paper can be converged and fixed, thereby turning a flat paper roll base paper into a paper yarn with a circular cross-section. This is a diagram showing forming and winding the formed paper yarn.
Figure 5 is a diagram showing a cross section of paper yarn according to an embodiment of the present invention.
Figure 6 shows the structure of a conventional coil ring and a product bound by such a coil ring.
Figure 7 shows the structure of a conventional twin ring and a product bound by such a twin ring.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the drawings.

Figure 1 shows that a hot melt layer 12 is formed on the inner side of a paper roll base paper 10 and a coating layer 14 is formed on the outer side in the method of manufacturing paper yarn according to an embodiment of the present invention.

Preferably, the paper roll base paper 10, which is flat on both sides, can be continuously supplied in a rolled form to enable a continuous manufacturing process, and can be wound again in a roll form with the hot melt layer 12 formed. there is. Preferably, the thickness of the paper roll base paper is 20㎛ to 60㎛. If the thickness of the paper roll base paper is too thin and less than 20㎛, tearing will occur during the process, and if it is too thick and exceeds 60㎛, the paper yarn itself will bend during the pultrusion process of manufacturing several layers of circular paper yarn. There is a problem with losing.

Hot melt is applied to the inner surface of the paper roll base paper 12 to form a hot melt layer 12. Preferably, the hot melt is a biodegradable hot melt. Compared to solvent-based adhesives or water-dispersible adhesives, hot melts are melted by heat and are easily liquefied. Since they can be bonded and molded by cooling without a separate drying process, process efficiency can be improved. In particular, solvent-based adhesives or water-dispersible adhesives only have adhesive properties, but their formability is significantly low, so it is difficult to apply them to the present invention and cannot be practically used in the production of paper yarn. Preferably, the thickness of the hot melt layer applied to the inner surface of the present invention is 20㎛ to 50㎛. If the hot melt layer is too thin and less than 20㎛, the softened hot melt layer may not be able to fill the voids between the overlapping paper roll bases in the subsequent coil forming process using paper yarn, and if it is too thick and exceeds 50㎛, coil forming may not be possible. There is a problem in that the rotation process is not smooth during the process and the hot melt overflows to the outside, damaging the exterior aesthetics.

Types of hot melt include eva series, polyamide series, polyester series, and polyurethane series. These hot melts are eco-friendly materials that are not harmful even when in contact with the skin, and also have the advantage of being able to be bonded and molded without solvents that are harmful to the human body. Therefore, all types of hot melts above are applicable to the present invention. However, since residual hot melt may be a problem in waste, it is more preferable to use a biodegradable hot melt in the present invention.

In the present invention, the main function of the hot melt layer is to secure formability by heat, pressure, and cooling rather than adhesion. In particular, it has the property of crystallizing (solidifying) in a short cooling time, which is used in the continuous manufacturing process of the present invention. It is a very important component in

Preferably, it is desirable to apply it to the inner surface of the paper roll base paper using a hot melt having a softening point of 80 to 160 degrees.

Most preferably, the thickness ratio of the overlapping paper roll base paper and the hot melt layer is 1:0.5 to 1. If the overlapping paper is too small compared to the hot melt layer, it is difficult to form a hard and rigid coil ring or twin ring, and if there is too much hot melt layer, the hot melt layer overflows to the outside when pressure is applied by the pressure roller, damaging the aesthetics. There is a problem.

In addition, as shown in FIG. 1, a coating layer 14 may be formed on the outer surface of the paper roll base paper 10, and this coating layer will later be used to protect the exposed portion of the outer surface of the final completed coil ring or twin ring from water resistance or water resistance. This is to ensure that it has an oil-resistance function. In general, inexpensive polyethylene (PE) was mainly used as a coating solution for water and oil resistance of conventional paper products, but polyethylene had the problem of not being environmentally friendly. Accordingly, in a preferred embodiment of the present invention, the coating layer 14 was formed using a biodegradable, eco-friendly, water-soluble coating solution. Furthermore, according to various embodiments of the present invention, as described above, a coating layer may be formed on the outer surface of the paper roll base paper and then slitted, or a coating layer may be formed on the outer surface of the slitted paper roll base paper as described later. Alternatively, after manufacturing the paper yarn by pultrusion, a coating layer can be formed on the paper yarn itself. That is, it is obvious to those skilled in the art that the outer surface of the paper roll base paper, the outer surface of the slitted paper roll base paper, or the outside of the paper yarn can be selectively coated with a biodegradable, environmentally friendly water-soluble coating solution.

Figure 2 illustrates slitting the base paper roll 10 on which the hot melt 12 and the coating layer 14 are formed to a predetermined width in the method of manufacturing paper yarn according to an embodiment of the present invention. Referring to FIG. 2, the paper roll base paper 10 provided in the form of a roll is continuously processed into the paper roll base paper 20 slit to a predetermined width by a slitter 22. Figure 2 shows that the paper roll base paper 10 is wound on a roll in the form of three slit paper roll base papers 20, but depending on the width of the initial paper roll base paper 10, several to dozens of slits are formed. Paper rolls can be processed into base paper rolls.

Optionally, the paper roll base paper may first be slit to a predetermined width, and then hot melt may be applied to the inner surface of the slit paper roll base paper to form a hot melt layer. In this case, a water-resistant layer can be selectively formed on the outer surface of the paper roll base paper. Preferably, the width of the slitted paper roll base paper is 15 mm to 70 mm. The diameter of the paper yarn produced by pultrusion processing of the slitted paper roll base paper is preferably 1.0 mm to 4 mm. Therefore, if the width of the slit paper roll base paper is too small, the thickness of the circular paper yarn may be too thin and less than 1.0 mm during the later pultrusion process, and if it is too large, the diameter of the circular paper yarn may be too thick and 4 mm. may exceed.

Figure 3 shows one end of at least one slit paper roll base 20 of a predetermined width being continuously wound toward the inside where the hot melt layer 12 is formed, overlapping with each other, converging and fixing in the form of paper yarn 30. Shows the process. Figure 4 shows the flat paper roll base paper being converted into paper yarn 30 with a circular cross-section by rotating the slitted paper roll base paper in a die (or die, mold) 22A and simultaneously performing a pultrusion process. It shows forming and winding the formed paper yarn on the bobbin 40.

Referring to Figures 3 and 4, the ends of the slitted paper roll base paper in the predetermined width direction are continuously wound toward the inside where the hot melt layer is formed, and the slit paper roll base paper ( 20) is rotated in a die (or die, mold) and a pultrusion process is performed at the same time, so that the slit paper roll base paper can be manufactured into paper yarn with a circular cross-section. The paper yarn manufactured in this way is wound on the bobbin 40 again. Optionally, after manufacturing the paper yarn, a coating layer can be formed on the outside of the paper yarn. In this case, the coating solution is applied to the paper yarn itself while unwinding the paper yarn wound on the bobbin.

Meanwhile, optionally, two or more sheets of slit paper roll base paper may be overlapped at the same time for pultrusion molding.

Preferably, the slitted paper roll base is rotated in a die (or die, mold) at 4 to 8 turns per 10 cm (4 to 8 turns/10 cm) to produce paper yarn with a circular cross section. If the rotation number is less than 4, there are too many voids between the rolled and overlapping papers, resulting in loose convergence and fixation, and the hot melt softened by heat is formed without completely filling the void layer during subsequent coil ring or twin ring forming. It is difficult to form a coil ring or twin ring with the desired rigidity and hardness, and if the number of rotations exceeds 8, there is a problem in that the tensile strength of the paper yarn itself is exceeded and the paper yarn breaks.

Figure 5 shows a cross section of paper yarn manufactured according to an embodiment of the present invention. As shown in Figure 5, by the rotation and pultrusion process of the above-described slit paper roll base paper, the hot melt layer 12 fills the voids between the overlapping papers 10, forming several overlapping layers. It can be seen that the papers are glued together, and the hot melt layer is crystallized between the papers, forming a rigid or hard paper yarn.

A coil ring or twin ring using the paper yarn manufactured according to the present invention can be formed by the following simple process.

First, before the main forming process, heat is applied to the paper yarn while unwinding the paper yarn wound on the bobbin to melt the hot melt layer inside the paper yarn and liquefy it. Preferably, the heating temperature is 80 to 160 degrees, which allows the hot melt layer to soften.

Next, the paper yarn with the internal hot melt layer melted is formed into a coil ring or twin ring using a coiling forming device or a twin ring forming device.

The coil ring or twin ring forming device should be interpreted as a broad concept that includes any forming device capable of processing the paper yarn of the present invention into a coil ring or twin ring form.

Preferably, the coil ring or twin ring is cooled at the same time as or after the molding, and the cooled coil ring can be cut to suit the product purpose or size and used for bookbinding.

Although the present invention has been described in detail above with respect to specific embodiments with reference to the drawings, the present invention is not limited to such specific structures. For example, the hot melt layer and the coating layer can be formed simultaneously or separately before or after slitting the paper roll base paper, and in particular, the coating layer can be selectively formed before or after slitting the paper roll base paper. Of course, it is obvious that it can be formed even after manufacturing paper yarn. Anyone skilled in the art will be able to make various modifications or changes to the present invention without departing from the technical spirit and scope of the present invention as set forth in the claims below. However, we would like to make it clear in advance that all such simple design material modifications or modified structures clearly fall within the scope of the present invention.

Claims (10)

In the continuous manufacturing method of paper yarn for coil ring or twin ring forming,
Forming a hot melt layer by applying hot melt to the inner surface of a paper roll base paper with both sides being flat;
Slitting the coated paper roll base paper to a predetermined width; and
Rotating the slitted paper roll base paper so that one end of the at least one slitted paper roll base paper in the predetermined width direction can be continuously wound toward the inside where the hot melt layer is formed and overlapped to converge and be fixed; At the same time, it includes the step of forming the flat paper roll base material into paper yarn with a circular cross-section by performing a pultrusion process,
A continuous manufacturing method of paper yarn, characterized in that the predetermined width of the paper roll base paper is 15 mm to 70 mm, and the thickness of the paper roll base paper is 20 ㎛ to 60 ㎛. In the continuous manufacturing method of paper yarn for coil ring or twin ring forming,
Slitting a paper roll base paper with flat sides on both sides to a predetermined width;
forming a hot melt layer by applying hot melt to the inner surface of the slitted paper roll base paper; and
Rotating the slitted paper roll base paper so that one end of the at least one slitted paper roll base paper in the predetermined width direction can be continuously wound toward the inside where the hot melt layer is formed and overlapped to converge and be fixed; At the same time, it includes the step of forming the flat paper roll base material into paper yarn with a circular cross-section by performing a pultrusion process,
A continuous manufacturing method of paper yarn, characterized in that the predetermined width of the paper roll base paper is 15 mm to 70 mm, and the thickness of the paper roll base paper is 20 ㎛ to 60 ㎛. The method of claim 1 or 2, wherein in the rotation and pultrusion process, the hot melt layer fills the voids between the overlapping papers, adheres the overlapping layers of paper to each other, and fills the gaps between the overlapping papers. A continuous manufacturing method of paper-made yarn, characterized in that the hot melt layer is crystallized between the layers and formed into a rigid or rigid paper-made yarn. The method of claim 1 or 2, further comprising the step of winding and storing the paper yarn. The method of claim 1 or 2, further comprising selectively coating the outer surface of the paper roll base paper, the outer surface of the slitted paper roll base paper, or the outside of the paper yarn with a biodegradable, eco-friendly water-soluble coating solution. A continuous manufacturing method of paper yarn, comprising: delete The method of claim 1 or 2, wherein the hot melt layer has a thickness of 20㎛ to 50㎛. The method of claim 1 or 2, wherein the thickness ratio of the overlapping paper roll base paper and the hot melt layer is 1:0.5 to 1. The method of claim 1 or 2, wherein the slitted paper roll base paper is continuously formed into a paper yarn having a circular cross-section while rotating at 4 to 8 turns per 10 cm (4 to 8 turns/10 cm), and the paper A continuous manufacturing method of paper yarn, characterized in that the diameter of the yarn is 1 mm to 4 mm. Paper-made yarn manufactured by the continuous manufacturing method of paper-made yarn according to claim 1 or 2.

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