JP6886568B1 - Japanese paper thread made from softwood, its manufacturing method, and Japanese paper woven fabric using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a uniform and stable Japanese paper yarn and Japanese paper cloth having excellent tensile strength required for a yarn having no variation in the quality of Japanese paper fiber itself and a woven product thereof even if there are variations in softwood as a raw material. There is. SOLUTION: In a method for manufacturing Japanese paper thread JY, a measurement step 10 for measuring the absolute dry weight of a coniferous tree chip CT as a raw material, the coniferous tree chip CT, and an amount of drug NO calculated based on the measurement result are combined. A dipping step 30 of immersing in an amount of water HO calculated based on the measurement result for a predetermined time, a cooking step 40 of evaporating the soaked coniferous tree chip CT, the drug NO and the water HO, and a coniferous tree chip in the cooking step 40. A paper making step 50 in which cellulose CL extracted from CT and Manila hemp MH are mixed and paper-making, a slit step 60 for slitting the Japanese paper JP made in the paper-making step 50, and a Japanese paper JP slit in the slit step 60 are performed. It is configured to include a twisting process of twisting to form Japanese paper yarn JY. [Selection diagram] Fig. 1

Description

The present invention relates to Japanese paper yarn made from softwood, particularly domestically produced softwood and thinned wood thereof, a method for producing the same, and a Japanese paper woven fabric using the same.

Conventionally, for example, as a paper thread using Manila hemp and sugar cane pomace as a part of raw materials and a method for producing the same, for example, a paper thread as shown in Patent No. 6570101 (Patent Document 1) and a method for producing the same are known. is there. The method for producing paper yarn described in the publication includes a removal step of removing lignin from plant fibers until the lignin content is less than 2%, and a removal treatment of fibers and lignin obtained in the removal step. A mixing step of mixing the non-vegetable plant fibers, a papermaking step of making paper using the mixture obtained in the mixing step, a slitting step of slitting the paper obtained in the papermaking step, and slitting. A paper formed from paper containing fibers having a lignin content of 15% or more and plant fibers having a lignin content of less than 2% is provided with a twisting step of twisting the paper to produce paper threads. It is suitable for production, which allows useful articles to be produced using paper containing different types of fibers.

On the other hand, of the major tree species that make up Japan's forests, the area of coniferous forests occupies about 52% of the total, and in planted forests that occupy about 80% of Japan's forest area, about 97% of them are coniferous trees. It is a forest. Many planted forests require thinning to maintain their health, but most of the thinned wood is left in the mountains and has nowhere to go.

In other words, while most of the main raw materials for cloth, such as cotton, wool, and silk, depend on imports, these domestic conifers, especially paper fabrics woven from paper threads made from thinned wood, are imported. It will be a useful material that can use domestic resources without relying heavily on silk.

In addition, the natural paper fibers produced in this way have excellent features such as environmental friendliness, high UV protection, high antibacterial properties, and ultra-lightweight, and 100% paper woven fabric has no fluff, so the skin is fluffy. It has the excellent property that even sensitive people can use it with peace of mind.

From this point of view, the applicant has repeated many years of research and development and improvement, and has reached the development of Japanese paper yarn made from domestic softwood and Japanese paper woven fabric produced from it. Conventionally, the Japanese paper and Japanese paper woven fabric made from domestic coniferous trees, especially thinned wood of coniferous trees, have not been produced in Japan, and the applicant has been a sword in this kind of field. However, the manufacturing process of the Japanese paper and the Japanese paper woven fabric includes a step of producing chips from the raw material conifer, a cooking process of cooking the raw material chips and extracting cellulose from the raw material chips to form pulp, and uniformly stretching the pulp to form Japanese paper. It was provided with a paper making process, a slitting process for slitting Japanese paper, and a twisting process for twisting the slitted paper to generate paper yarn, but it is used when using domestically produced coniferous trees, especially thinned coniferous trees. There are variations in the part of the coniferous tree to be used, the individual water content, and the dry state. Therefore, in the cooking process, the dissolution rate of the raw material chips varies, and among the raw material chips, the highly dry raw material chips have fibers remaining. There has been a problem that the fiber length varies due to the remaining hard part and the quality of Japanese paper itself varies.

Patent No. 6570101 Fig. 3

The present invention has been made to solve the above-mentioned conventional problems, and an object of the present invention is to provide a yarn in which the quality of Japanese paper fiber itself does not vary even if the softwood used as a raw material varies. It is an object of the present invention to provide a uniform and stable Japanese paper thread and Japanese paper cloth having excellent tensile strength required for the woven product.

Another object of the present invention is to provide Japanese paper yarn and Japanese paper cloth which have good antibacterial properties of softwood as a raw material.

The method for producing Japanese paper thread according to claim 1 comprises a measurement step of measuring the absolute dry weight of a thinned wood chip of a coniferous tree as a raw material, and the thinned wood chip and an amount of chemicals calculated based on the measurement result. A dipping step of immersing in an amount of water calculated based on the measurement result for a predetermined time, a cooking step of evaporating the soaked coniferous tree chips, chemicals and water, and a mixture of cellulose and Manila hemp extracted in the cooking step. It is characterized by including a paper-making step of making paper, a slit step of slitting the Japanese paper made in the paper-making step, and a twisting step of twisting the Japanese paper slit in the slit step to form a Japanese paper thread. ..

In the method for producing Japanese paper yarn according to claim 1, in the step of extracting cellulose from the raw material chips of softwood, the raw material chips of softwood are immersed in a predetermined amount of chemicals and water according to the absolute dry weight for a long time. Since the step is provided, the quality of the cellulose remaining in the cooking step can be kept constant and good.

The method for producing washi yarn according to claim 2 is the method for producing washi yarn according to claim 1, wherein the chemical in the dipping step is 50% of the absolute dry weight of the thinned wood chips measured in the measuring step. It is sodium hydroxide, and the water in the dipping step is 300% of the absolute dry weight of the thinned wood chips measured in the measuring step.

In the method for producing Japanese paper yarn according to claim 2, in the step of extracting cellulose from the raw material chips of coniferous trees, the raw material chips of coniferous trees are immersed in a predetermined amount of chemicals and water for a long time according to the absolute dry weight. Since the process is provided, the quality of the cellulose remaining in the cooking process is kept constant and good, and Japanese paper yarn having excellent tensile strength can be produced.

The method for producing washi yarn according to claim 3 is the method for producing washi yarn according to claim 1 or 2, wherein the ratio of mixing cellulose extracted from softwood chips and Manila hemp in the paper making step is 1: 1. It is characterized by being.

In the method for producing Japanese yarn according to claim 3, in the papermaking process, the mixing ratio of cellulose extracted from softwood chips and Manila hemp is 1: 1 and therefore, the antibacterial property possessed by softwood is preferably used. Can be retained.

The method for producing washi cloth according to claim 4 further includes a weaving step for producing washi cloth by weaving the washi yarn obtained by the method for producing washi yarn according to any one of claims 1 to 3. It is a feature.

In the method for producing Japanese paper cloth according to claim 4, in the step of extracting cellulose from the raw material chips of coniferous trees, the raw material chips of coniferous trees are immersed in a predetermined amount of chemicals and water for a long time according to the absolute dry weight. Since the process is provided, the quality of the cellulose remaining in the cooking process is kept constant and good, and a Japanese paper cloth made of Japanese paper yarn having excellent tensile strength can be produced.

According to the method for producing Japanese paper thread according to claim 1, a measurement step for measuring the absolute dry weight of the thinned wood chips of coniferous trees as a raw material, and the thinned wood chips and the amount of chemicals calculated based on the measurement results. The dipping step of immersing the soaked coniferous tree chips, chemicals and water in an amount of water calculated based on the measurement results for a predetermined time, and the cellulose and Manila hemp extracted in the cooking step. A coniferous tree has a paper-making step of mixing and making paper, a slitting step of slitting the Japanese paper made in the paper-making step, and a twisting step of twisting the Japanese paper slit in the slitting step to form a Japanese paper thread. In the step of extracting cellulose from the raw material chips, a step of immersing in a predetermined amount of chemicals and water according to the absolute dry weight of the coniferous raw material chips for a long time is provided, so that the quality of cellulose remaining in the cooking step is constant and good. Can be kept in.

According to the method for producing Japanese paper yarn according to claim 2, in the method for producing Japanese paper yarn according to claim 1, the chemical in the dipping step is 50 of the absolute dry weight of the thinned wood chips measured in the measuring step. % So sodium hydroxide, and the water in the dipping step is 300% of the absolute dry weight of the thinned wood chips measured in the measuring step. Therefore, in the step of extracting cellulose from the raw material chips of the coniferous tree, the coniferous tree Since it is provided with a process of immersing in the optimum amount of chemicals and water according to the absolute dry weight of the raw material chips for a long time, the quality of cellulose remaining in the cooking process is kept constant and good, and Japanese paper yarn with excellent tensile strength is manufactured. can do.

The method for producing washi yarn according to claim 3 is the method for producing washi yarn according to claim 1 or 2, wherein the ratio of mixing cellulose extracted from coniferous tree chips and Manila hemp in the paper making step is 1: 1. Therefore, since the mixing ratio of cellulose extracted from the coniferous tree chips in the papermaking process and Manila hemp is one-to-one, the antibacterial property possessed by the coniferous tree can be suitably maintained.

According to the method for manufacturing Japanese paper cloth according to claim 4, the weaving step for manufacturing Japanese paper cloth by weaving the Japanese paper thread obtained by the method for manufacturing Japanese paper thread according to any one of claims 1 to 3 is further provided. Therefore, in the step of extracting cellulose from the raw material chips of coniferous trees, a step of immersing in a predetermined amount of chemicals and water according to the absolute dry weight of the raw material chips of coniferous trees for a long time is provided, so that the quality of cellulose remaining in the cooking step is provided. It is possible to produce a Japanese paper cloth made of Japanese paper yarn which is kept constant and has excellent tensile strength.

It is a flowchart which shows the manufacturing method of the Japanese paper cloth which concerns on this invention. It is a schematic diagram which shows the measurement process. It is a schematic diagram which shows the calculation process. It is the schematic which shows the immersion process. It is the schematic which shows the cooking process. It is the schematic which shows the papermaking process. It is the schematic which shows the slit process. It is the schematic which shows the twisting process. It is a schematic diagram which shows the weaving process.

Hereinafter, examples for producing the Japanese paper cloth JF according to the present invention will be described with reference to the drawings.

FIG. 1 is a flowchart showing a method for manufacturing Japanese paper cloth according to the present invention. As shown in FIG. 1, the Japanese paper cloth JF according to the present invention has a measurement step 10 for measuring the absolute dry weight of the coniferous tree chip CT as a raw material, and a calculation for calculating the amounts of drug NO and water HO based on the measurement results. Step 20, the dipping step 30 of immersing the coniferous tree chip CT and the amount of drug NO calculated based on the measurement result in the amount of water HO calculated based on the measurement result for a predetermined time, and the immersion step 30. In the cooking step 40 for evaporating the coniferous tree chip CT, the drug NO and the water HO, the papermaking step 50 for mixing the cellulose CL extracted from the coniferous tree chip CT and the Manila hemp pulp MH in the cooking step, and the papermaking step 50 for making paper. A slit step 60 for slitting the paper-made Japanese paper JP, a twisting step 70 for twisting the Japanese paper JP slit in the slit step 60 to form a Japanese paper yarn JY, and a Japanese paper cloth JF are manufactured by weaving the Japanese paper yarn JY. The weaving process 80 is provided.

The coniferous chip CT used as a raw material is produced from domestically produced coniferous trees such as cedar, cypress, and cypress leaves, and in particular, when thinned woods thereof are used, domestic resources can be effectively used. Further, as a raw material for washi yarn and washi paper having excellent antibacterial properties, which will be described later, coniferous trees such as cedar, cypress, and cypress leaves having high antibacterial properties are suitable.

In the measurement step 10, for example, as shown in FIG. 2, first, the water content of the softwood chip CT is measured, and the weight 14 of the softwood chip CT is measured by a weighing scale 13 (note that the weight is measured in advance). The water content of the softwood chip CT may be measured.) The moisture content of the softwood chip CT is measured by, for example, a wood moisture meter 12. As the measurement by the wood moisture meter 12, it is preferable to use a high frequency type moisture meter, an electric resistance type moisture meter, a microwave transmission type moisture meter, or the like. Further, the raw material to be measured may be the coniferous tree cut into an appropriate size before being chipped. If the water content of the softwood chip CT can be measured, the water content 15 of the softwood chip CT is calculated from the weight 14 of the softwood chip CT, and the water content 15 is calculated from the weight 14 of the softwood chip CT measured by the weigh scale 13. Is subtracted to calculate the absolute dry weight 11.

In the calculation step 20, as shown in FIG. 3, the amounts of the drug NO and water HO added in the cooking step 40 are calculated based on the absolute dry weight 11 of the softwood chip CT measured in the measurement step 10. To do. The drug NO is sodium hydroxide, and the amount added is 50% by weight of the absolute dry weight of the softwood chip CT. The water to be added is 300% of the absolute dry weight 11 of the softwood chip CT. For example, when the softwood chip CT is 1000 kg and the water content is 30%, the absolute dry weight 11 of the softwood chip CT is 700 kg, the sodium hydroxide NO to be added is 350 kg, and the water HO to be added. Is 2100 kg. When the softwood chip CT is 1000 kg and the water content is 40%, the absolute dry weight 11 of the softwood chip CT is 600 kg, the sodium hydroxide NO to be added is 300 kg, and the water to be added. The HO weighs 1800 kg.

As shown in FIG. 4, in the immersion step 30, the drug NO of the weight calculated based on the absolute dry weight 11 of the softwood chip CT measured in the measurement step 10 is applied to the softwood tip CT together with the softwood tip CT. This is a step of immersing in water NO having a weight calculated based on the absolute dry weight of 11. For example, the drug NO having a weight calculated based on the absolute dry weight 11 of the softwood chip CT, the softwood chip CT, and the weight calculated based on the absolute dry weight 11 of the softwood chip CT in the earth kettle 31. Immerse in a state of being mixed with water NO for about 24 to 48 hours. During this period, for example, even if conifer thinned wood is used as a raw material, one lot of the conifer chip CT may be used in various parts, the time since logging, the condition, the season at the time of logging and recovery, the weather, and the like. Even if woody states such as water content and hardness are mixed, the mixed softwood chip CT is applied to the suitable amount of the sodium hydroxide NO and water HO for a relatively long time. By soaking for about 24 hours to 48 hours, the softness and the woody state such as hardness and softness are leveled in the softwood chip CT, and the strength of the finally produced Japanese paper thread JY and Japanese paper JF cloth ( Tensile strength) can be increased to improve quality and stability.

In the cooking step 40, for example, as shown in FIG. 5, the earth pot 31 contains the sodium hydroxide NO having a weight calculated based on the absolute dry weight 11 of the softwood chip CT, the softwood chip CT, and the softwood chip CT. A mixture of water HO having a weight calculated based on the absolute dry weight 11 of the softwood chip CT and soaked for about 24 to 48 hours is brought to a temperature of about 160 to 170 degrees and added. Boil for about 6 hours in a pressurized state to dissolve and remove lignin and a part of hemicellulose contained in the softwood chip CT, and extract cellulose CL which is a raw material of the Japanese paper JP.

Then, in the papermaking step 50, as shown in FIG. 6, the cellulose CL obtained in the cooking step 40 and the Manila hemp pulp MH are mixed and made into paper to produce the Japanese paper JP. At this time, if the mixing ratio of the cellulose CL extracted from the softwood chip CT in the cooking step 40 and the Manila hemp pulp MH is 50%, the antibacterial property of the softwood chip CT is not lowered. High antibacterial properties can be maintained in the Japanese paper JP, the Japanese paper thread JY, and the Japanese paper cloth JF obtained in the following steps while holding the paper.

Then, in the slit step 60, which is the next step, as shown in FIG. 7, the Japanese paper base paper is finely cut into thin paper SL having a width of about 1 to 4 mm, and in the plying step 70, as shown in FIG. In addition, it is wound in a spiral shape and twisted. Manufactures Japanese paper thread JY. Then, in the weaving step 80, as shown in FIG. 9, the Japanese paper thread JY is woven to produce the Japanese paper cloth JF.

Of the above steps, the Japanese paper JP obtained in the paper making step 50 is finally produced in the dipping step 30 by increasing the water content of the coniferous tree chip CT and the leveling of the woody state such as hardness and softness. It is possible to increase the strength (tensile strength) of Japanese paper thread JY and Japanese paper JF cloth to improve and stabilize the quality.

Table 1 is a conventional paper quality test table.

According to the paper quality test table shown in Table 1, the conventional production method (the amount of the chemical and water blended is not measured based on the absolute dry weight of the raw material coniferous tree, and also includes a long-time immersion step with them. The tensile strength (kg / 15 mm) of the washi obtained by (not) is "2,4", "1,8", "2,53", "2,25", "2,662". Met.

Table 2 is a product property comparison table of Japanese paper JP obtained in the manufacturing process according to the present invention.

Then, in the product property comparison table of the Japanese paper JP obtained in the manufacturing process according to the present invention shown in Table 2, the Japanese paper JP obtained in the manufacturing process according to the present invention is compared with the Japanese paper manufactured by the conventional manufacturing method. The tensile strength (kg / 15 mm) MD is "2,74", "3,14", and "2,77", which are high values of 2,74 kg / 15 mm or more, and the above-mentioned products to be manufactured from now on. It enhances the strength (tensile strength) of Japanese paper thread JY and the Japanese paper JF cloth, and contributes to the improvement and stability of quality.

さらに、表３に示す前記和紙糸ＪＹの抗菌性試験結果表に示されるように、本発明に係る製造方法によって得られる前記前記和紙糸ＪＹは、洗濯をしていない状態で抗菌活性値は「５，９」であり、洗濯回数が１０回のものでも抗菌活性値は「３，６」であり、高い抗菌活性値を示しており、この数値はＪＩＳ Ｌ １９０２：２０１５によると、抗菌効果としては「強い効果が認められる」ものとなっている。一方、一般社団法人繊維評価技術協議会による「SEKマーク繊維製品認証基準」では、「抗菌防臭加工」の基準は、抗菌活性値(A)≧２，２であるところ、この基準を十分にクリアするものとなっており、優れた抗菌性を保持することが認められる。 Table 3 is a table of antibacterial test results of the Japanese paper thread JY.

Further, as shown in the antibacterial test result table of the Japanese paper yarn JY shown in Table 3, the Japanese paper yarn JY obtained by the production method according to the present invention has an antibacterial activity value of "" in the unwashed state. The antibacterial activity value is "3, 6" even if the number of washings is 10 times, which is "5, 9", indicating a high antibacterial activity value. According to JIS L 1902: 2015, this value is as an antibacterial effect. Is "a strong effect is recognized". On the other hand, in the "SEK Mark Textile Product Certification Criteria" by the Textile Evaluation Technology Council, the criteria for "antibacterial and deodorant processing" are antibacterial activity value (A) ≥ 2,2, which is sufficiently cleared. It is recognized that it retains excellent antibacterial properties.

10 Measurement process 20 Chemical calculation process 30 Immersion process 40 Steaming process 50 Paper making process 60 Slit process 70 Plying process 80 Weaving process

CT Softwood Chip NO Chemical HO Water CL Cellulose MH Manila Hemp Pulp JP Japanese Paper JY Japanese Paper Thread JF Japanese Paper Cloth

Claims (4)

A measurement process that measures the absolute dry weight of thinned wood chips from coniferous trees, which is the raw material,
A dipping step of immersing the thinned wood chips and an amount of chemicals calculated based on the measurement results in an amount of water calculated based on the measurement results for a predetermined time.
The cooking step of cooking the soaked softwood chips, chemicals and water, and
A papermaking process in which cellulose extracted from softwood chips in the cooking process and Manila hemp are mixed and made into paper.
A slitting process for slitting Japanese paper made in the papermaking process,
A plying process in which Japanese paper slit in the slit process is twisted to form a Japanese paper thread, and a twisting process.
A method for producing Japanese paper yarn, which is characterized by the above. The chemical in the dipping step is sodium hydroxide, which is 50% of the absolute dry weight of the thinned wood chips measured in the measuring step, and the water in the dipping step is the extinction of the thinned wood chips measured in the measuring step. The method for producing Japanese paper yarn according to claim 1, wherein the dry weight is 300%. The method for producing Japanese paper yarn according to claim 1 or 2, wherein in the papermaking process, the mixing ratio of cellulose extracted from softwood chips and Manila hemp is 1: 1. A method for producing a Japanese paper cloth, further comprising a weaving step of weaving the Japanese paper thread obtained by the method for producing a Japanese paper thread according to any one of claims 1 to 3 to produce a Japanese paper cloth.

Images