KR20230036706A - 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 relates to a continuous manufacturing method of paper yarn for forming a coil ring and a twin ring in order to perform binding a note, sketchbook, a calendar, a planner, etc. through perforated holes, and paper yarn manufactured by the continuous manufacturing method. Disclosed is a continuous manufacturing method of paper yarn for forming a coil ring or a twin ring, the continuous manufacturing method comprising the steps of: applying a hot melt to an inner surface of paper roll base material, which has flat both sides to form a hot melt layer; slitting the applied paper roll base material so as to have a predetermined width; and simultaneously forming the flat paper roll base material into the paper yarn having a circular cross-section by rotating the slitted paper roll base material and performing a pultrusion process such that one end portion of at least one slitted paper roll base material in a predetermined width direction is continuously wound and overlapped to be gathered and fixed toward an inner side in which the hot melt layer is formed.

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 relates to a continuous manufacturing method of paper yarn for easily shaping coil rings or twin rings for binding through perforated holes, particularly notebooks, sketchbooks, calendars, planners, and paper manufactured by the continuous manufacturing method. It's about yarn.

In general, there are two types of binding through perforated holes, such as conventional notebooks, sketchbooks, calendars, planners, etc., coil ring and twin ring, and wire or plastic (PVC, PET) ring was used. The binding method by coil ring is a method of binding in an oblique shape by continuously inserting a coil ring composed of one line into each perforated hole. It is a method of binding in the form of a ring.

In this regard, FIG. 6 shows the structure of a conventional coil ring 1 and a product bound by such a coil ring 1, and FIG. 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/demand for eco-friendly products and the problem of separate collection at the time of disposal, the products using the conventional wire or plastic ring as described above must be separated from the paper and separated from the wire and plastic for recycling at the time of disposal. There was a hassle to do, and there was also a problem that the wire or plastic ring itself was not environmentally friendly.

In addition, in the case of office and stationery products such as notebooks, sketchbooks, calendars, planners, and planners 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, making it difficult to use the product. There was also a problem that safety accidents such as stabbing or cutting hands often occur.

Therefore, the present inventor replaces the material itself for forming the coil ring or twin ring with paper yarn subjected to a specific process according to the present invention, so that the entire finished product is environmentally friendly and can solve the inconvenience of separation and discharge at the time of disposal, In particular, the risk of safety accidents caused by the sharp ends of conventional wire or plastic is eliminated, and furthermore, the subsequent ring molding process is simpler than before, so that the efficiency of the entire manufacturing process can be improved and the cost can be reduced. It has come to develop a continuous production method and paper yarn by such a continuous production method.

For reference, the prior art (Patent No. 10-1124063) discloses a product that can replace wire with paper when binding with twin rings. However, the prior art paper products used in twin ring binding have a complicated production process, are difficult to produce continuously, and have a very high manufacturing cost. , a heat fusion process, etc., takes a considerable amount of time, and as a result, there is a problem in that the bookbinding production cost or cost is greatly increased.

Republic of Korea Patent Registration No. 10-1124063 'Paper Binder, and its Manufacturing System and Manufacturing Device'

An object of the present invention is to use paper yarns subjected to specific processing as a coil ring or twin ring material instead of a 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 Alternatively, it can be easily discharged without cumbersome work of separately separating the twin rings, in particular, it is possible to eliminate the risk of safety accidents caused by the sharp ends of conventional wires or plastics, and it can be manufactured continuously by a series of sequential processes. Therefore, the manufacturing cost is low, and furthermore, the subsequent coiling forming process is also simpler than before, thereby providing a paper-made 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 continuous manufacturing method of paper yarn for coil ring or twin ring formation, by applying hot melt to the inner surface of a paper roll base paper with both sides flat forming a; Slitting the base paper of the coated paper roll to a predetermined width; And rotating the slit paper roll base paper so that one end of the at least one slit paper roll base paper in the predetermined width direction can be overlapped and converged while continuously winding toward the inside where the hot melt layer is formed and fixed. At the same time, by performing a pultrusion process, a method for continuously producing paper-made yarns is disclosed, which includes forming the flat paper roll base paper into paper-made yarns having a circular cross section.

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

Preferably, in the rotation and pultrusion process, the hot melt layer bonds the overlapped papers to each other while filling the gaps between the overlapped papers, and the hot melt layer is formed between the overlapped papers. While being crystallized, it is molded into rigid or rigid paper yarn.

More preferably, further comprising the step of winding and storing the paper-made yarn.

Preferably, the outer surface of the paper roll base paper, the outer surface of the slit paper roll base paper, or the outer surface of the paper yarn, further comprising selectively coating a biodegradable, environmentally friendly water-soluble coating liquid.

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 μm to 50 μm.

Preferably, the ratio of the overlap-wound paper roll base paper to the hot melt layer is 1:0.5 to 1.

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

Provided is a paper-made yarn produced by the continuous production method of the above-described paper-made 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 can be easily discharged without the cumbersome work of separately separating the coil ring or twin ring made of paper at the time of disposal. In particular, the conventional wire or plastic The risk of safety accidents caused by sharp ends can be eliminated, and manufacturing costs can be drastically reduced because continuous manufacturing can be performed through a series of sequential processes. Efficiency improvement and cost reduction effect can be obtained.

1 is a view showing that a hot melt layer is formed on the inner surface and a coating layer is formed on the outer surface of a paper roll base paper according to an embodiment of the present invention.
2 is a view showing slitting a paper roll base paper having a hot melt layer and a coating layer formed thereon to a predetermined width according to one embodiment of the present invention.
Figure 3 shows that according to one embodiment of the present invention, one end of at least one slit paper roll base paper in the predetermined width direction is continuously wound toward the inside where a hot melt layer is formed, overlapping, converging and fixing. it is a drawing
Figure 4, according to one embodiment of the present invention, by rotating the slit paper roll base paper and pultrusion at the same time so that the paper roll base paper can be converged and fixed, a paper yarn having a circular cross section of a flat paper roll base paper It is a view showing the molding and winding of the molded paper yarn.
5 is a view showing a cross section of a paper-made yarn according to an embodiment of the present invention.
6 shows the structure of a conventional coil ring and a product bound by such a coil ring.
Fig. 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.

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

Preferably, the paper roll base paper 10 with both sides flat can be continuously supplied in a rolled state to enable a continuous manufacturing process, and can be rolled back in a roll form with the hot melt layer 12 formed thereon. there is. Preferably, the thickness of the paper roll base paper is 20 μm to 60 μm. If the thickness of the paper roll base paper is too thin and less than 20 μm, tearing occurs during the process, and if it is too thick and exceeds 60 μm, the paper yarn itself is bent in the pultrusion process for producing multiple 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-type adhesives or water dispersion-type adhesives, hot melt is melted by heat and easily liquefied, and since bonding and molding are possible by cooling without a separate drying process, process efficiency can be improved. In particular, solvent-type adhesives and water-dispersion-type adhesives have only adhesiveness, but have remarkably low formability, making it difficult to apply to the present invention and cannot be practically used for producing paper yarn. Preferably, the thickness of the hot melt layer applied to the inner surface of the present invention is 20 μm to 50 μm. If the hot melt layer is too thin and less than 20 μm, the softened hot melt layer in the coil forming process using the subsequent paper yarn may not fill the gap between the overlapping paper roll base papers, and if it is too thick and exceeds 50 μm, coil forming There is a problem in that the rotation process is not smooth during the process and the hot melt overflows to the outside and damages the external aesthetics.

Types of hot melt include eva, polyamide, polyester, polyurethane, etc. These hot melts are eco-friendly materials that are harmless even if they come in contact with the skin, and can be bonded and molded without solvents harmful to the human body. Therefore, all types of hot melts are applicable to the present invention. However, since residual hot melt may be a problem in waste, it is more preferable to use biodegradable hot melt in the present invention.

In the present invention, the main function of the hot melt layer is to play a very important role in securing formability by heat, pressure, and cooling rather than adhesive action, and in particular, it has the characteristic of being crystallized (solidified) in a short cooling time, so that the continuous manufacturing process of the present invention It is a very important component in

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

Most preferably, the ratio between the base paper of the overlapped paper roll 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 coil ring or twin ring with rigidity and rigidity, and if the hot melt layer is too large, the hot melt layer overflows to the outside when pressure is applied by the pressure roller, spoiling 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 such a coating layer is applied to the exposed portion of the outer surface of the coil ring or twin ring that is finally completed later in the water resistance or This is to ensure that it has an oil-resistant function. In general, inexpensive polyethylene (PE) has been mainly used as a coating solution for water and oil resistance of conventional paper products, but polyethylene has a problem in that it is not environmentally friendly. Accordingly, in a preferred embodiment of the present invention, the coating layer 14 was formed using a biodegradable, environmentally 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, followed by slitting, or as described below, a coating layer on the outer surface of the slit paper roll base paper It may be formed, or after manufacturing a paper yarn by pultrusion, a coating layer may be formed on the paper yarn itself. That is, it is apparent that those skilled in the art can selectively coat the outer surface of the paper roll base paper, the outer surface of the slit paper roll base paper, or the outer surface of the paper yarn with a biodegradable, environmentally friendly water-soluble coating liquid.

Figure 2 shows the slitting of the paper roll base paper 10 on which the hot melt 12 and the coating layer 14 are formed to a predetermined width in the method for producing 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 the slitter 22. 2 shows that the paper roll base paper 10 is wound into 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 slit Paper rolls can be processed into base paper rolls.

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

3 shows that one end of a predetermined width of at least one slit paper roll base paper 20 is continuously wound toward the inside where the hot melt layer 12 is formed, overlapping each other and converging and fixing in the form of paper yarn 30 shows the process of becoming Fig. 4 rotates the slitted paper roll base paper in a die (or die, mold) 22A and at the same time performs a pultrusion process, thereby turning the flat paper roll base paper into a paper yarn 30 having a circular cross section. It shows molding and winding the molded paper-made yarn to the bobbin 40.

Referring to FIGS. 3 and 4, slit paper roll base paper ( 20) is rotated in a die (or die, mold) and at the same time, a pultrusion process is performed, so that the slitted paper roll base paper can be manufactured into a paper yarn having a circular cross section. The paper-made yarn thus manufactured is wound around the bobbin 40 again. Optionally, after manufacturing the paper yarn, a coating layer may be formed on the outside thereof. In this case, the coating liquid 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 to perform pultrusion.

Preferably, the slit paper roll base paper is rotated in a die (or die, mold) at 4 to 8 turns per 10 cm (4 to 8 turns / 10 cm) to produce a paper yarn having a circular cross section. If the number of revolutions is less than 4, there are too many voids between the overlapping papers, resulting in loose convergence and fixation, so that the hot melt softened by heat during subsequent coiling or twin ring molding is molded in a state where the void layer is not completely filled, It is difficult to form a coil ring or twin ring having desired rigidity and rigidity, and when the number of revolutions exceeds 8, there is a problem that the paper yarn is broken beyond the tensile strength of the paper yarn itself.

Figure 5 shows a cross-section of a paper-made yarn manufactured according to an embodiment of the present invention. As shown in FIG. 5, by the above-described rotation and pultrusion process of the slit paper roll base paper, the hot melt layer 12 fills the gap between the overlapping papers 10, and several layers of overlapping and winding It can be seen that the papers are bonded to each other, 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-made yarn manufactured according to the present invention can be formed by the following simple process.

First, before the main molding process, while unwinding the paper yarn wound on the bobbin, heat is applied to the paper yarn to melt and liquefy the hot melt layer inside the paper yarn. Preferably, the heating temperature is 80 degrees to 160 degrees at which the hot melt layer can be softened.

Next, the paper yarn in which the hot melt layer inside is melted is formed into a coil ring or twin ring by a coil ring forming device or a twin ring forming device.

The coil ring or twin ring forming apparatus should be interpreted as a broad concept including any forming apparatus capable of processing the paper-made yarn of the present invention into a coil ring or twin ring form.

Preferably, at the same time as the molding or after the molding, the coil ring or twin ring may be cooled, and the cooled coil ring may be cut according to product use or size to be used for bookbinding.

Although the present invention has been described in detail with respect to specific embodiments with reference to the drawings above, the present invention is not limited to such a specific structure. For example, the hot melt layer and the coating layer may be formed simultaneously or separately before or after slitting the paper roll base paper, and in particular, the coating layer may be selectively formed before or after slitting the paper roll base paper. Of course, it is obvious that furthermore can be formed even after manufacturing the paper yarn. Those skilled in the art will be able to variously modify or change the present invention without departing from the spirit and scope of rights of the present invention described in the following claims. However, it should be noted in advance that all such simple design material modification or transformation 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 molding,
Forming a hot melt layer by applying hot melt to the inner surface of the base paper of the paper roll, both sides of which are flat;
Slitting the base paper of the coated paper roll to a predetermined width; and
Rotating the slit paper roll base paper so that one end of the at least one slit paper roll base paper in the predetermined width direction can be overlapped and converged while continuously winding toward the inside where the hot melt layer is formed, and At the same time, forming the flat paper roll base paper into a paper yarn having a circular cross section by performing a pultrusion process;
Continuous manufacturing method of paper-made yarn comprising a. In the continuous manufacturing method of paper yarn for coil ring or twin ring molding,
Slitting the base paper of the paper roll, both sides of which are flat, into a predetermined width;
Forming a hot melt layer by applying hot melt to the inner surface of the slit paper roll base paper; and
Rotating the slit paper roll base paper so that one end of the at least one slit paper roll base paper in the predetermined width direction can be overlapped and converged while continuously winding toward the inside where the hot melt layer is formed, and At the same time, forming the flat paper roll base paper into a paper yarn having a circular cross section by performing a pultrusion process;
Continuous manufacturing method of paper-made yarn comprising a. The method of claim 1 or 2, wherein in the rotation and pultrusion process, the hot melt layer bonds the overlapped and wound papers to each other while filling the gap between the overlapped and wound papers, and the overlapped and wound paper Continuous manufacturing method of paper-made yarn, characterized in that the hot melt layer is crystallized between them and molded into a rigid or hard paper-made yarn. The method of claim 1 or 2, further comprising the step of winding and storing the paper-made yarn. The method of claim 1 or 2, wherein the outer surface of the paper roll base paper, the outer surface of the slit paper roll base paper, or the outer surface of the paper yarn, to selectively coat the biodegradable eco-friendly water-soluble coating liquid further Continuous manufacturing method of paper-made yarn, characterized in that it comprises. The method of claim 1 or 2, wherein the paper roll base has a predetermined width of 15 mm to 70 mm, and the paper roll base paper has a thickness of 20 μm to 60 μm. The method of claim 1 or 2, wherein the hot melt layer has a thickness of 20 μm to 50 μm. The method of claim 1 or 2, wherein the ratio of the base paper of the overlapped paper roll and the hot melt layer is 1:0.5 to 1. The method of claim 1 or 2, wherein the slit paper roll base paper is rotated at 4 to 8 turns per 10 cm (4 to 8 turns / 10 cm), and is continuously molded into a paper yarn having a circular cross section, and the paper The continuous production method of paper yarn, characterized in that the diameter of the yarn is 1mm to 4mm. Paper yarn produced by the method for continuously producing paper yarn according to claim 1 or 2.

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