JP2016141898A - Tubular twisted yarn, method for producing tubular twisted yarn, tatami mat and method for producing tatami mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for producing a tubular twisted yarn by twisting paper tape, by which the yarn can be made with high strength and stable quality through a simple step.SOLUTION: A twisted yarn is produced by providing a barrier layer 2 on one surface of base paper 1 so that a barrier layer surface 6a is inside a twisted yarn 9.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a tubular twisted yarn obtained by twisting a paper tape, a method for producing the twisted yarn, a tatami mat obtained by weaving the tubular twisted twisted yarn, and a method for producing the same.

  Thin paper with a waist is cut into thin paper to obtain a paper tape, and the twisted tube formed by twisting the paper tape is woven into a paper woven fabric that can be used as a material for wallpaper, slippers, hats, seat covers, etc. It is used as an alternative to tatami mats.

  Such a paper woven fabric has a natural texture and is an excellent material. However, when used for a rug such as a tatami mat, the durability of the paper fabric needs to be improved.

  Therefore, Patent Document 1 discloses a technique for imparting durability to a tatami mat surface by slitting and twisting paper and passing through a resin impregnation step after weaving.

  Patent Document 2 discloses a technique for producing a tatami mat having excellent water repellency and antifouling properties by weaving after impregnating a resin in two stages after twisting.

Japanese Patent No. 2597256 Japanese Patent No. 3609153

  However, it is difficult to uniformly impregnate the entire surface of the tatami surface with the resin described in Patent Document 1, color unevenness caused by uneven impregnation of the resin occurs, and the amount of resin used increases. There is a problem. Moreover, in the thing of the said patent document 2, since the resin impregnation amount changes with the penetration | infiltration grades to a base paper, there exists a problem that it is difficult to adjust so that the resin impregnation amount may become uniform over the whole twisted yarn. . In addition, the physical properties and colors vary due to variations in the resin impregnation amount, and when the tatami surface is worn, the ends of the twisted yarn are turned over, which may deteriorate the physical properties and feel.

  Therefore, the present invention provides a twisted yarn produced by twisting a paper tape to obtain a twisted yarn having excellent strength and stable quality, and a production method capable of obtaining such a twisted yarn in a simpler process. For the purpose. Further, by weaving such a twisted twisted tube, durability is improved, and a paper fabric such as a tatami mat with a stable quality is obtained, and a production method capable of obtaining such a paper fabric is brought about. For the purpose.

  In order to achieve the above object, in the present invention, a barrier layer is provided on one side of the base paper, and the twisted yarn is manufactured so that the barrier layer surface is inside the twisted yarn.

  That is, the method for producing a twisted twisted yarn disclosed herein is a method of producing a twisted twisted yarn by twisting a paper tape, and after providing a barrier layer on one side of the base paper, the base paper is cut into a paper tape, or A barrier layer forming step of obtaining a paper tape having a barrier layer surface formed on one side by providing a barrier layer on one side of the paper tape cut from the base paper, and producing the twisted yarn so that the barrier layer surface is arranged inside the twisted yarn by the paper tape. A twisting step for obtaining twisted yarn and an impregnation step for impregnating the twisted yarn with a resin for impregnation to obtain a twisted twisted tube.

  According to the present invention, the surface of the outermost layer of the twisted yarn that is twisted in a plurality of layers is paper, the back surface of the outermost layer is a barrier layer, and only the outermost layer is impregnated with resin in the impregnation step. Control of the resin impregnation amount in the impregnation step is facilitated, and the resin impregnation amount can be reduced. In addition, since the presence of the barrier layer allows the resin to be uniformly and sufficiently impregnated only in the surface layer of the twisted yarn, it is possible to suppress uneven color (white yarn) and variations in physical properties due to impregnation unevenness, Durability can be improved. Furthermore, since the surface of the outermost layer is paper impregnated with a resin, it is possible to obtain an excellent touch similar to the conventional one.

  In a preferred embodiment, the barrier layer is formed using a thermoplastic resin in the barrier layer forming step, and the twisted yarn is melted before the impregnating resin is impregnated in the impregnation step. Heat treatment is effective.

  By the heat treatment, the barrier layer of the twisted yarn made of the thermoplastic resin can be bonded, and the twisted surface of the twisted yarn can be suppressed. Further, by adhering the layers of the twisted yarn, impregnation of the resin from the barrier layer is suppressed, and the amount of resin impregnation in the impregnation step can be further reduced.

  The barrier layer may contain a functional agent. In particular, when a resin such as a thermoplastic resin is used for the barrier layer, the barrier layer is preferably formed by adding a functional agent to the resin. Thereby, the various effects which a functional agent has can be brought to a twisted yarn.

  Moreover, the tube | ply twisted yarn disclosed here can be manufactured suitably with the said manufacturing method.

  Further, the method for producing a paper fabric disclosed herein is a method for producing a paper fabric by weaving a tubular twisted twisted yarn obtained by twisting a paper tape, and after providing a barrier layer on one side of a base paper A barrier layer forming step of obtaining a paper tape having a barrier layer surface formed on one side by cutting the base paper into a paper tape or by providing a barrier layer on one side of the paper tape cut from the base paper, and the barrier layer surface on the inner side of the twisted yarn by the paper tape A twisted yarn process for producing a twisted yarn so as to be arranged, an impregnation step for impregnating the twisted yarn with an impregnation resin to obtain a twisted tube yarn, and weaving the twisted tube yarn to produce a paper fabric And a weaving process.

  According to the present invention, it is easier to control the resin impregnation amount in the impregnation step than before, and the resin impregnation amount can be reduced. Further, uneven color (white yarn) and variations in physical properties can be suppressed, and durability can be improved. Since the outermost surface of the paper fabric is a paper impregnated with a resin, the same excellent touch as that of the prior art can be obtained.

  In a preferred embodiment, the barrier layer is formed using a thermoplastic resin in the barrier layer forming step, and the thermoplastic resin is melted in the twisted yarn before the impregnation resin is impregnated in the impregnation step. Heat treatment at temperature.

  By the heat treatment, the barrier layer of the twisted yarn can be adhered, and the twist of the surface of the twisted yarn can be suppressed to improve the durability of the paper fabric, and the good touch can be maintained. And the resin impregnation amount in an impregnation process can further be reduced.

  The barrier layer may contain a functional agent. In particular, when a resin such as a thermoplastic resin is used for the barrier layer, the barrier layer is preferably formed by adding a functional agent to the resin. Thereby, the various effects which a functional agent has can be brought to paper textiles.

  The paper fabric is preferably a tatami mat.

  Moreover, the tatami mat disclosed here can be suitably manufactured using the manufacturing method.

  As described above, according to the present invention, in a twisted tube yarn produced by twisting a paper tape, it is possible to obtain a twisted yarn having excellent strength and stable quality, and such a twisted yarn can be obtained in a simpler process. A production method that can be obtained can be provided. In addition, by weaving such a twisted tube yarn, durability can be improved, and a paper fabric such as a tatami mat with a stable quality can be obtained, and a production method capable of obtaining such a paper fabric can be obtained. Can bring.

FIG. 1 is a view for explaining a barrier layer forming step according to the first embodiment of the present invention. FIG. 2 is a diagram for explaining a twisting process according to the present embodiment. Drawing 3 is a figure for explaining the twisted yarn manufactured in the twisting process concerning this embodiment. FIG. 4 is a view of a part of the twisted yarn shown in FIG. 3 as viewed from the IV direction. FIG. 5 is a Va-Va cross-sectional view of the twisted yarn shown in FIG. 4, in which (a) shows a state before the heat treatment and (b) shows a state after the heat treatment.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiments is merely exemplary in nature and is in no way intended to limit the invention, its application, or its application.

[First Embodiment]
(Manufacturing method of twisted tube)
The manufacturing method of the tube twisted yarn 11 according to the first embodiment of the present invention generally includes a barrier layer forming step S1, a twisting yarn step S2, and an impregnation step S3.

  As shown in FIG. 1, in the barrier layer forming step S <b> 1, the molten laminating resin 22 is flowed on the base paper 1 with a T-die 21, and pressed with a cooling roll 3 and a nip roll 4. After the laminating resin 22 is laminated and integrated to form the barrier layer 2, the paper tape 6 is manufactured by winding through a cutting machine (not shown) and cutting to a predetermined width.

The base paper 1 is a base for the above-mentioned twisted twisted yarn, and is a mechanical Japanese paper obtained by papermaking a paper having a basis weight of about 15 to 35 g / m ² mainly composed of mechanical pulp such as conifers and hardwoods. Is preferred. If necessary, Kouzo, Mitsumata, Ganpi, Manila Asa, flax etc. may be used in part or all.

  The barrier layer 2 may be any layer provided on one side of the base paper 1 and capable of inhibiting excessive resin impregnation in the impregnation step S3 described later. Further, it is sufficient that the base paper 1 is exposed on the side that is not the barrier layer 2. Therefore, as the barrier layer 2, for example, laminating with a laminating resin or the like, forming a thin metal film by vapor deposition or laminating, or applying and curing a UV curable resin or an electron beam curable resin on one side is a resin. It can be formed by a method such as forming a thin film. Note that so-called resin-impregnated paper impregnated with all-layer resin cannot be impregnated with resin in the impregnation step S3, and is not preferable as the base paper 1 in the present invention. In this embodiment, the barrier layer 2 is formed by laminating one side of the base paper 1 with the laminating resin 22.

  The laminating resin 22 used in this embodiment is preferably a thermoplastic resin (heat-sealable resin) having various heat sealing properties that can be melted by heat and fused to each other. Etc. can be used. Specifically, for example, low density polyethylene, medium density polyethylene, high density polyethylene, linear (linear) low density polyethylene, ethylene-α / olefin copolymer, polypropylene, ethylene-vinyl acetate copolymer, ionomer. Resin, ethylene-acrylic acid copolymer, ethylene-ethyl acrylate copolymer, ethylene-methacrylic acid copolymer, ethylene-methyl methacrylate copolymer, ethylene-propylene copolymer, methylpentene polymer, polybutene polymer, Polyolefin resins such as polyethylene or polypropylene are modified with an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic acid, maleic anhydride, fumaric acid, itaconic acid, acid-modified polyolefin resin, polyvinyl acetate resin, poly (meta ) Acrylic resin, poly It may be used vinyl-based resin, other like resins. Particularly preferred are polyethylenes such as low density polyethylene, medium density polyethylene, and high density polyethylene.

  In this embodiment, one or more of the above-described resins are used and melt-extruded using an extruder or the like, and the melt-extruded resin layer is melted via an anchor coat layer or the like. The barrier layer 2 is formed by extrusion lamination.

  In the present invention, one or more of the above-mentioned resins are used, and a film or sheet of these resins is produced in advance, and the resin film or sheet is dried via an adhesive layer for laminating or the like. The barrier layer 2 may be formed by laminating. In this case, a polyethylene film or the like is used as the laminating resin 22, and the laminating process can be performed by a dielectric roll heating method, for example.

  In addition, the thickness of the barrier layer is preferably 3 to 200 μm, more preferably 5 to 100 μm, and particularly preferably 5 to 50 μm.

  Moreover, after laminating, the base paper 1 is wound around a paper tube (not shown) with a wide width so as to have a predetermined length, for example, with a slitter or the like so as to have a predetermined width (for example, about 10 to 20 mm) provided to the twisted yarn. After being cut, it can be stored or transported in the state of paper tape 6 by further winding.

  Next, as shown in FIGS. 2 and 3, the twisting step S <b> 2 is a step of forming the twisted yarn 9 by twisting the paper tape 6 provided with the barrier layer 2 using the tape twisting means 7. At this time, twist is applied so that the barrier layer surface 6 a of the paper tape 6 is inside the twisted yarn 9.

  The tape twisting means 7 forms the twisted yarn 9 by twisting the paper tape 6 by rotating the paper tape 6 conveyed continuously in a predetermined direction around the imaginary axis along the traveling direction. In addition, the code | symbol 8 in FIG. 1 is a guide roll for changing the traveling direction of the twisted yarn 9 which passed the tape twist means 7. FIG.

  As shown in FIG. 4, the outer diameter of the twisted yarn 9 formed in the twisting step S2 and the diameter of the cavity generated in the center thereof are not particularly limited, but the end use and processing are not limited. From the standpoint of ease, etc., the outer diameter of the twisted yarn 9 is set to about 0.5 to 2.0 mm, the cavity diameter is set to about 0.2 to 1.5 mm, and the number of turns is about 3 to 15 turns. It is preferable to set to.

  Next, in the impregnation step S3, after the heat treatment is performed at a temperature at which the resin laminated to the twisted yarn 9 is melted, the impregnated resin (impregnation resin) is impregnated, and after drying, the finished resin-impregnated twisted yarn 10 is cut. Adjust the length.

  Here, the temperature of the heat treatment is desirably a temperature at which the thermoplastic resin melts, preferably 120 to 200 ° C, more preferably 160 to 190 ° C, and particularly preferably 170 to 180 ° C. The heat treatment time is preferably 10 seconds to 10 minutes, more preferably 20 seconds to 5 minutes, and particularly preferably 30 seconds to 2 minutes.

  As described above, the barrier layer 2 is formed using the thermoplastic resin in the barrier layer forming step, and the heat treatment is performed at a temperature at which the thermoplastic resin (heat-fusible resin) is melted before the impregnation resin is impregnated. Then, the laminate resin 22 on the barrier layer surface 6a shown in FIG. 5A is fused, and the layers of the twisted yarns 9 are adhered as shown in FIG. 5B. Thereby, the turning of the surface of a twisted yarn can be suppressed. Further, since the layers are adhered, when the resin is impregnated, the resin impregnation from the interlayer is suppressed, and the resin impregnation amount can be further reduced.

  The impregnation resin is preferably a synthetic resin such as an acrylic resin, a cellulose resin, a nylon resin, an amino resin, a fluorine resin, a silicone resin, or the like. Thereby, the strength of the twisted yarn can be improved, paper flaking can be prevented, and the product can have a firmness. In addition, physical properties such as wear strength and touch are improved. A water repellent effect as a water repellent for imparting an antifouling effect can be imparted. In the present embodiment, an acrylic resin as a reinforced resin and a fluororesin and a silicone resin as a water repellent are used.

  The impregnation of the resin is performed by the following procedure.

  The resin is kneaded in a kneading section of a resin impregnation apparatus (not shown) and supplied to the impregnation section. Then, the resin yarn is impregnated by passing the twisted yarn 9 after the heat treatment through the impregnation portion.

  The resin-impregnated twisted yarn 10 formed as described above is dried by a drying means (not shown) such as a hot air dryer or a far-infrared dryer. As a result, the impregnated resin is dried and solidified to complete the cylindrical twisted yarn 11. The completed tube twisted yarn 11 is wound up by a winding device (not shown). Moreover, you may cut to the predetermined length which can use for not only winding but a loom.

(Cylinder twisted yarn)
As shown in FIG. 5 (b), the tube twisted yarn 11 manufactured by the above manufacturing method has a Japanese paper surface 6b on the outermost surface of the twisted yarn and a barrier layer surface 6a of polyethylene on the back surface. Therefore, since only the surface layer is impregnated with the impregnation resin in the impregnation step S3, the resin impregnation amount can be reduced as compared with the conventional case, and the control of the resin impregnation amount is facilitated. In addition, the presence of the barrier layer 2 allows the impregnation resin to be uniformly and sufficiently impregnated only in the surface layer of the tube twisted yarn 11, thereby suppressing color unevenness (white yarn) and variations in physical properties, Durability can be improved.

(Tatami surface manufacturing method)
The tatami surface 12 according to the present invention can be manufactured by weaving the tube twisted yarn 11.

  The weaving step S4 of the tube twisted yarn 11 is performed using a commercially available loom, for example, a Nakamura tatami mat automatic loom (“NS-L”, manufactured by Nakamura Machinery Co., Ltd.).

  The tatami table 12 manufactured in this way can suppress color unevenness (white yarn) and variations in physical properties as compared with conventional ones, and can effectively improve durability. Moreover, since the outermost surface of the tatami surface 12 is formed of paper impregnated with a resin, it is possible to obtain an excellent touch similar to the conventional one.

[Other Embodiments]
Hereinafter, other embodiments according to the present invention will be described. In the description of these embodiments, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the barrier layer forming step S1, instead of manufacturing the paper tape 6 by laminating the base paper 1 after laminating, the laminating resin 22 is applied to one side of the base paper 1 formed by cutting the base paper 1 first. By laminating, it is possible to obtain a paper tape 6 having a barrier layer surface 6a formed on one side.

  In the impregnation step S3, the impregnation resin may be impregnated without performing a heat treatment.

  Further, in the impregnation step S3, the resin impregnation can be performed in two stages of primary impregnation and secondary impregnation. In this case, in the primary impregnation, the twisted yarn 9 is impregnated with, for example, a mixed solution of an acrylic resin that is a reinforced resin and a fluororesin that is a water repellent, and then dried. In the subsequent secondary impregnation, for example, the fluororesin is impregnated. And then dried.

  According to this configuration, the strength of the twisted yarn can be effectively improved by the primary impregnation. Further, since only the water repellent agent is impregnated on the surface of the twisted yarn by secondary impregnation, the water repellent agent is concentrated and applied to the surface portion, and there is an effect that moisture hardly permeates and is difficult to get dirty.

  Moreover, the desired effect may be obtained more reliably by using the same resin as the impregnation resin used for the primary impregnation and the secondary impregnation.

  Further, a functional agent can be contained in the laminating resin 22 used in the barrier layer forming step S1. Thereby, the functional agent can be contained in the barrier layer 2 of the paper tape 6, and various effects of the functional agent can be brought to the tube twisted yarn 11 and the tatami surface 12.

  Specific examples of the functional agent include water and oil repellents such as fluorine compounds having a perfluoroalkyl group or a perfluoroalkylene group, acrylic, vinyl acetate, acrylic-styrene copolymer, ethylene-vinyl acetate copolymer. Reinforced resins such as coal, carbon materials such as charcoal, bamboo charcoal, activated carbon and Bincho charcoal, deodorants such as silica, alumina and zeolite, antibacterial agents such as inorganic antibacterial agents such as silver, copper and zinc, pyrethroid compounds , Anti-mite agents such as organic phosphorus compounds and carbamate compounds, natural ingredients such as persimmon astringent, wood vinegar, cypress essential oil, hiba essential oil, wasabi thiol, catechin, organic compounds such as thiabendazole, diphenyl, orthophenylphenol, titanium oxide Antifungal agents such as inorganic compounds such as nitroamines such as melamine compounds and guanidine compounds Far-infrared ceramics made of flame retardants, phosphorus-based flame retardants such as ammonium phosphate, or flame retardants such as silicon-based flame retardants, the above-mentioned carbon materials, and mixtures of alumina, silica, sodium oxide, potassium oxide, iron oxide, etc. Far-infrared radiation agents, negative ion generators such as tourmaline, zeolite, quartz and graphite. These functional agents can be used alone or in combination.

  Moreover, in the said embodiment, although the thermoplastic resin is mainly made into a molten state as the barrier layer 2, and the manufacturing method which laminates and forms the barrier layer 2 is demonstrated, as mentioned above, this invention is this. There is no limit. That is, as the barrier layer 2, for example, a thin metal film may be formed on one side of the base paper 1 that has been subjected to a sealer treatment, if necessary, by vapor deposition or lamination. In another embodiment, the barrier layer 2 is formed by applying a UV curable resin or an electron beam curable resin on one side and curing the surface layer before impregnating the entire layer of the base paper 1 to form a resin thin film. It may be.

  Further, following the barrier layer forming step S1, a twisting step S2 may be performed, and the obtained twisted yarn 9 may be woven to obtain a tatami surface 12, which may be subjected to an impregnation step S3. In this case, the resin impregnation is performed on the tatami mat 12 after weaving rather than impregnating the twisted yarns 9 one by one, so that efficient resin impregnation is possible. And since the uniform barrier layer 2 exists in the back surface of the outermost surface layer of twisted yarn, it is hard to produce impregnation nonuniformity and the amount of resin impregnations can also be reduced. In this case, the heat treatment step may be performed in the steps before and after the impregnation step S3. By performing the heat treatment after weaving, the surface strength of the twisted yarn 9 is improved and it is difficult to turn, and the woven fibers are thermally fused to improve the strength as a woven fabric.

  Moreover, the tube twisted yarn 11 according to the present invention can be suitably used not only as a tatami surface but also as a material for various paper fabrics such as wallpaper, slippers, hats, and sheet cover materials.

  Next, specific examples will be described.

Example 1
After laminating a polyethylene film having a thickness of 13 μm on a mechanical Japanese paper having a weight of 25 g / m ^2, the paper was cut to obtain a paper tape having a width of 15 mm. This was twisted so that the barrier layer surface was on the inside to form a twisted yarn having a twisted yarn diameter of about 1.0 to 1.1 mm. Next, as an impregnation step, the twisted yarn was subjected to heat treatment (170 ° C., 2 minutes), and then 37 parts by weight of a 50% acrylic resin solution, 2 parts by weight of a fluororesin, 0.2 parts by weight of a silicone resin, and 60.8 parts by weight of water. After being immersed in a treatment liquid consisting of parts and impregnating with a resin, it was dried by heating with a ventilated dryer for 1 minute, and then cut to form a twisted tube. The cylinder twisted yarn was woven using a Nakamura tatami mat automatic loom to produce a tatami mat.

(Example 2)
A twisted yarn was formed in the same manner as in Example 1. As an impregnation step, the twisted yarn was immersed in a treatment solution comprising 37 parts by weight of a 50% acrylic resin solution, 0.5 parts by weight of a fluororesin, and 62.5 parts by weight of water. After being dried by heating, immersed in a treatment liquid consisting of 2 parts by weight of a fluororesin and 98 parts by weight of water, impregnated with the resin, heated and dried with a ventilated dryer for 1 minute, and then cut to form a twisted tube. . The cylinder twisted yarn was woven using a Nakamura tatami mat automatic loom to produce a tatami mat.

(Comparative Example 1)
A machined paper with a weight of 22 g / m ² was used as a 21 mm wide paper tape. This was twisted to form a tubular twisted yarn having a twisted yarn diameter of about 1.0 to 1.1 mm. The impregnating step was performed on the cylindrical twisted yarn under the same conditions as in Example 1. The cylinder twisted yarn was woven using a Nakamura tatami mat automatic loom to produce a tatami mat.

(Comparative Example 2)
A machine paper with a weight of 25 g / m ² was used as a 20 mm wide paper tape. This was twisted to form a tubular twisted yarn having a twisted yarn diameter of about 1.0 to 1.1 mm. The tube twisted yarn was subjected to an impregnation step under the same conditions as in Example 2. The cylinder twisted yarn was woven using a Nakamura tatami mat automatic loom to produce a tatami mat.

(Resin impregnation test)
Table 1 shows the resin impregnation amounts of Examples 1 and 2 and Comparative Examples 1 and 2.

  As shown in Table 1, the amount of resin impregnation is reduced in the tube twisted yarns of Examples 1 and 2 subjected to lamination compared to the tube twisted yarns of Comparative Examples 1 and 2 that are not subjected to lamination. I understand that. From this, it is considered that the resin is not impregnated to the inside of the twisted yarn because the barrier layer is formed inside the twisted twisted yarn. For this reason, the amount of resin in the impregnation step can be reduced and the productivity can be improved.

  Further, comparing Example 1 and Example 2, it can be seen that the amount of resin impregnation in Example 1 is about half that of Example 2. Therefore, in the impregnation step, by performing a heat treatment before impregnation of the resin, the layers of the twisted yarn can be adhered, the strength of the twisted yarn can be effectively improved, and the twisted surface of the twisted yarn can be suppressed, Impregnation of the resin from the interlayer is suppressed, and the amount of resin impregnation can be further reduced.

  The present invention relates to a tubular twisted twisted yarn manufactured by twisting a paper tape, and is capable of obtaining a twisted yarn having excellent strength and stable quality, and a manufacturing method capable of obtaining such a twisted yarn in a simpler process. It can be very useful. In addition, by weaving such a twisted tube yarn, durability can be improved, and a paper fabric such as a tatami mat with a stable quality can be obtained, and a production method capable of obtaining such a paper fabric can be obtained. It can be very useful.

DESCRIPTION OF SYMBOLS 1 Base paper 2 Barrier layer 6 Paper tape 6a Barrier layer surface 9 Twist yarn 11 Tube twist twist yarn

Claims (9)

A method of twisting a paper tape to produce a twisted tube,
A barrier layer forming step of obtaining a paper tape having a barrier layer surface formed on one side by cutting the base paper into a paper tape after providing a barrier layer on one side of the base paper, or by providing a barrier layer on one side of the paper tape cut from the base paper; ,
A twisting step of obtaining a twisted yarn by performing twisted yarn production so that the barrier layer surface is disposed inside the twisted yarn by the paper tape, and
An impregnation step of impregnating a resin for impregnation into the twisted yarn to obtain a twisted twisted tube. In claim 1,
In the barrier layer forming step, the barrier layer is formed using a thermoplastic resin,
In the impregnation step, before twisting the impregnation resin, the twisted yarn is heat-treated at a temperature at which the thermoplastic resin melts. In claim 1 or 2,
The barrier layer contains a functional agent.   A tubular twisted yarn manufactured by the manufacturing method according to any one of claims 1 to 3. A method for producing a paper fabric by weaving a tubular twisted yarn obtained by twisting a paper tape,
A barrier layer forming step of obtaining a paper tape having a barrier layer surface formed on one side by cutting the base paper into a paper tape after providing a barrier layer on one side of the base paper, or by providing a barrier layer on one side of the paper tape cut from the base paper; ,
A twisting step of obtaining a twisted yarn by performing twisted yarn production so that the barrier layer surface is arranged inside the twisted yarn by the paper tape,
An impregnation step of impregnating the twisted yarn with an impregnating resin to obtain a twisted tube;
And a weaving step of weaving the tubular twisted yarn to produce a paper fabric. In claim 5,
In the barrier layer forming step, the barrier layer is formed using a thermoplastic resin,
In the impregnation step, before twisting the impregnation resin, the twisted yarn is heat treated at a temperature at which the thermoplastic resin melts. In claim 5 or 6,
The method for producing a paper fabric, wherein the barrier layer contains a functional agent. In any one of Claims 5-7,
The method for producing a paper fabric, wherein the paper fabric is a tatami surface.   A tatami mat manufactured using the manufacturing method according to claim 8.