JP4492887B2 - Water-soluble woven or knitted fabric, method for producing the same and water-soluble yarn - Google Patents

Description

  The present invention relates to a water-soluble woven fabric or knitted fabric, a method for producing the same, and a water-soluble yarn. More specifically, the present invention relates to a time until the yarn, woven fabric or knitted fabric is dissolved in water while ensuring water solubility. It relates to what can be made extremely long.

  Yarns constituting woven fabrics and knitted fabrics are made of natural fibers and synthetic fibers, but are usually water-insoluble, which are not normally soluble in water. Therefore, woven fabrics or knitted fabrics themselves are also water-insoluble. It is common to be done.

  Japanese Patent Application Laid-Open No. H10-228561 discloses a product that has improved washing resistance and the like by twisting a linear Japanese paper and forming a garment using a yarn to which molten wax is attached. The yarn and clothes described in Patent Document 1 have no water solubility.

  Patent Document 2 discloses that a Japanese paper cut into a narrow width is rolled up to form a twisted yarn, and a woven fabric or a knitted fabric is formed using the twisted yarn. In the thing of this patent document 2, in order to improve the intensity | strength of the textile fabric or knitting formed using Japanese paper and to secure a softness | flexibility and elasticity, a thread | yarn or clothes itself is positively put into water. The idea of melting is not recognized at all.

  Patent Document 3 discloses a method for producing a water-absorbing fibrous sheet material used for disposable towels, napkins and the like formed from papermaking fibers. The fiber sheet material described in Patent Document 3 has increased flexibility, strength, extensibility, absorbability, absorption capacity, moisture absorption, and resistance to friction, and the fiber sheet material itself is soluble in water. There is nothing.

  Patent Document 4 discloses a device in which a rolled paper tape can be easily drawn upward by means similar to various spun yarns and filament yarns by devising the winding shape of a flat paper tape. ing. However, in this patent document 4, it is not recognized at all that yarn, woven fabric, and knitted fabric are actively dissolved in water.

  Patent Document 5 discloses a technique for increasing the water resistance of a paper string and the support itself when the support for plant cultivation is formed using the paper string. The thing of this patent document 5 is invention of a viewpoint completely opposite to the viewpoint of making it melt | dissolve in water.

  Patent Documents 6 and 7 disclose a fiber impregnated with a soap solution or the like.

  Patent Document 8 discloses a paper base for paper yarn that can prevent occurrence of a paper-cutting trouble at the time of slit processing and that is mainly composed of natural fibers with good formation.

Japanese Patent Laid-Open No. 11-172541 Japanese Patent Laid-Open No. 7-118975 Japanese Patent Laid-Open No. 50-13613 JP-A-2005-306600 JP 2000-32852 A Japanese Utility Model Publication No. 2-11486 Japanese Utility Model Publication No. 6-7594 JP 2006-265742 A

  If the woven fabric or the knitted fabric can be dissolved in water after being used for an appropriate period, disposal such as incineration becomes unnecessary, which is preferable in terms of carbon dioxide reduction. In particular, it is preferable from the viewpoint of effective utilization of natural resources to form a woven fabric or knitted fabric using yarn formed from paper made of natural ingredients. In addition, the fabric or knitted fabric is further dissolved in water after use and disposed of. If possible, it will be extremely preferable.

  The present invention has been made in view of the circumstances as described above, and its purpose is to ensure a water-soluble woven fabric or knitted fabric that can be made extremely long to dissolve in water, and its It is to provide a production method and a water-soluble yarn.

In order to achieve the above object, the following solution is adopted in the method for producing a water-soluble woven fabric or knitted fabric in the present invention. That is, as described in claim 1 in the claims,
A first step of rolling up an elongated water-soluble paper piece to form a twisted fine thread;
A second step in which a plurality of the fine yarns are combined and rolled up to form one strong twisted thick yarn;
A third step of forming a woven or knitted fabric using the thick yarn;
It seems to be equipped with.

  According to the above solution, the woven fabric or the knitted fabric is dissolved in water by being immersed in water after use. For this reason, it is not necessary to incinerate the used woven or knitted fabric. In addition, although water-soluble paper is used, the water-soluble paper is made into a strand-like fine yarn, and a plurality of the fine yarns are combined into a strand-like thick yarn to form a woven fabric or a knitted fabric. Therefore, the time required for the woven fabric or knitted fabric to dissolve in water becomes extremely long, and it can withstand use such as a towel or the like that touches a large amount of water. In addition, the obtained woven fabric or knitted fabric has strength, flexibility and elasticity, and can be used for a wide range of uses as woven fabric or knitted fabric.

Preferred embodiments based on the above solution are as described in claims 2 to 4 in the claims. That is,
The raising in at least one of the first step and the second step is performed while spraying water vapor (corresponding to claim 2). In this case, it is possible to reduce the tensile force and torsional force applied when winding up in a twisted shape, which is preferable in preventing a situation where the yarn is unexpectedly cut during winding. Become. And after the completion of the lifting, the attached water (water vapor) evaporates easily and quickly from the yarn, preventing the situation where the water vapor given during the lifting is left in the yarn for a long time. Will be. In order to prevent the yarn from being cut, for example, it is possible to apply industrial oil, but in this case, it is not preferable because the yarn contains the industrial oil semipermanently. It becomes. In addition, when water is simply applied, a large amount of water adheres and the water-soluble paper is dissolved.

  As the water-soluble paper piece, one that is pre-impregnated with at least one of soap, a fragrance, a bactericidal / antibacterial agent, and a natural dye is used (corresponding to claim 3). In this case, the functionality associated with the pre-impregnated material can be imparted to the woven or knitted fabric.

  After the third step, the method further comprises a fourth step of folding back the outer peripheral edge of the woven fabric or knitted fabric and sewing the folded portion with a water-soluble thread. ). In this case, it is preferable to prevent the outer peripheral edge of the woven or knitted fabric from fraying or dissolving in water at an early stage.

  After the three steps, the method further comprises a fourth step of crimping the outer peripheral edge of the woven or knitted fabric with a press machine (corresponding to claim 5). In this case, it is possible to prevent the outer peripheral edge of the woven fabric or the knitted fabric from fraying or being dissolved in water at an early stage by a method simpler than sewing such as crimping.

In order to achieve the above object, the following solution is adopted for the water-soluble woven fabric or knitted fabric in the present invention. That is, as described in claim 6 in the claims,
The yarn forming the woven or knitted fabric is a twisted thick yarn that is rolled up by combining a plurality of fine yarns,
The thin thread is in the form of a twisted up water-soluble paper strip,
It is like that. In this case, it is possible to provide a water-soluble woven fabric or knitted fabric having the effect corresponding to the first aspect.

Preferred embodiments based on the above solution are as set forth in claims 7 and 8 in the claims. That is,
The water-soluble fabric or knitted fabric is a water-soluble towel made of fabric,
The outer peripheral edge of the towel is folded, and the folded portion is sewn with a water-soluble thread.
(Corresponding to claim 7). In this case, fraying of the outer peripheral edge of the towel can be prevented, and a towel that is often immersed in a large amount of water is preferable in preventing a situation where the towel is quickly dissolved from the outer peripheral edge, for example, What is suitable as a disposable towel provided at a hotel or the like is provided.

The water-soluble fabric or knitted fabric is a water-soluble towel made of fabric,
The outer peripheral edge of the towel is crimped,
This is done (corresponding to claim 8). In this case, the same effect as in the case of claim 7 can be obtained by a simple technique called crimping.

In order to achieve the above object, the following solution is adopted for the water-soluble yarn in the present invention. That is, as described in claim 9 in the claims,
It is said to be a coyori-like thick thread that is rolled up by combining multiple thin threads,
The thin thread is in the form of a twisted up water-soluble paper strip,
It is like that. In this case, it is possible to provide a yarn capable of extremely increasing the time until it is dissolved in water while ensuring water solubility.

  According to the present invention, it is possible to extremely increase the time until dissolution in water while ensuring water solubility. As a result, the applicable range of water-soluble paper can be expanded to a wider range than before, and it can be applied to various types of fabrics and knitting. It can be performed.

The figure which shows wide water-soluble paper. The enlarged view which shows the elongate water-soluble paper piece obtained by cut | disconnecting the water-soluble paper shown in FIG. FIG. 3 is an enlarged view showing a twisted fine thread obtained by rolling up the water-soluble paper piece shown in FIG. 2. FIG. 4 is an enlarged view showing a twisted thick thread obtained by rolling up a plurality of thin threads shown in FIG. 3. The figure which shows an example of the towel formed using the thick thread shown in FIG. The flowchart which shows the example of a manufacturing method of this invention. The top view which shows the preferable example of the towel formed by this invention. X8-X8 line equivalent sectional drawing of FIG. FIG. 9 is a cross-sectional view corresponding to FIG. 8, showing another preferred example of a towel formed according to the present invention.

  FIG. 1 shows a water-soluble paper 10. The water-soluble paper 10 is wide having a required area and thickness, and its basis weight is, for example, about 19 g / square m. As such a water-soluble paper 10, a rectangular paper having a size (area) that can be easily handled in advance may be used. For example, the water-soluble paper 10 has a width of about 1.2 m and a length of about 2,000 m, and is wound into a roll. A long one can be cut and used.

  FIG. 2 shows a water-soluble paper piece 20 obtained by cutting the wide water-soluble paper 10 shown in FIG. 1 in the width direction. This water-soluble paper piece 20 is obtained by cutting the water-soluble paper 10 shown in FIG. 1 at equal intervals in the width direction (for example, intervals of 3 to 6 mm). In FIG. 1, the cutting positions are indicated by broken lines, but the actual number of broken lines is larger than that shown in FIG. 1.

  By twisting up the water-soluble paper piece 20 shown in FIG. 2, a twisted thin thread 30 as shown in FIG. 3 is formed. A plurality of the thin yarns 30 are rolled up to form a single solid twisted thick yarn 40 as shown in FIG.

  An example of the towel 50 obtained by weaving using the thick yarn 40 is shown in FIG. 5 (for example, width 25 cm × length 90 cm and thickness 1 to 2 mm). The towel 50 can have an appropriate size (area) and thickness depending on the application. For example, in the case of body washing, the size can be, for example, 25 to 35 cm wide × 75 to 100 cm long. For example, in the case of hand wipe, the size can be, for example, 5-20 cm wide × 5-20 cm long.

  The towel 50 does not dissolve easily even when it is exposed to a large amount of water. That is, if the water-soluble paper 10 or the water-soluble paper piece 20 is used as it is, it will be dissolved in water after several tens of seconds, so that the function as a towel cannot be expected at all. However, in the towel 50 obtained by the present invention, the water-soluble paper piece 20 is used as a twisted thin thread 30, and a plurality of the thin threads 30 are combined to form a single solid thick thread 40. Since the towel 50 is obtained by taking out, it does not melt even if it is in contact with a large amount of water for a long time, and can be used as a towel.

  After the use of the towel 50, the towel 50 is soaked in water, and eventually dissolves in water. Therefore, it is not necessary to separately incinerate the towel 50 after use (no carbon dioxide is generated during the disposal), which is extremely preferable as a disposable towel.

  FIG. 6 is a flowchart showing an example of a manufacturing process for obtaining the towel 50 shown in FIG. Hereinafter, FIG. 6 will be described. In the figure, S represents a step. In the example illustrated in FIG. 6, the towel 50 is provided with a special function such as a soap function in advance.

  First, in step S1, water-soluble paper is impregnated with at least one of soap solution, fragrance, and bactericidal / antibacterial agent in advance, and then dried to obtain dry water-soluble paper (water-soluble paper 10 shown in FIG. 1 is obtained). can get). In step S1, a natural dye can be impregnated instead of or together with the soap solution, the fragrance, the bactericidal / antibacterial agent.

  In step S2, the dry water-soluble paper 10 in step S1 is cut in the width direction by a slitter (cutting machine) or the like, thereby obtaining an elongated water-soluble paper piece 20 as shown in FIG. In step S3, the water-soluble paper piece 20 obtained in step S2 is rolled up to obtain a twisted thin thread 30 having a desired diameter and length.

  In step S4, a single robust thick yarn 40 is obtained by rolling up a plurality of (for example, three) fine yarns 30 obtained in step S3. In step S5, the towel 50 is woven using the thick yarn 40 obtained in step S4. The obtained towel 50 has a function corresponding to the material impregnated in step S1.

  Here, at the time of raising in step S4 or step S3, as shown in FIG. 3 and FIG. 4, it is performed while spraying water vapor (steam). This is preferable in preventing a situation where the cut is caused. In FIG. 3, water vapor is sprayed around and around the start of scooping. Further, in FIG. 4, steam (steam) is sprayed from the nozzle 60 to the vicinity immediately after the three fine yarns 30 are gathered (the vicinity where the winding starts and before and after that). A plurality of nozzles 60 can be arranged at intervals in the longitudinal direction of the threads 30 and 40. By spraying water vapor, the fine thread 30 and the thick thread 40 that are being rolled up are given moderate crease, and the winding is performed smoothly and with a smaller twisting force or tensile force. This makes it possible to prevent inadvertent cutting (stable rotation (tension) and twisting).

  In addition, it is possible to prevent cutting at the time of rolling-up by adding, for example, industrial oil instead of water vapor. However, in this case, the fine yarn 30 or the thick yarn 40 that has been wound up is not preferable because it is impregnated with a lot of industrial oil.

  The point which the towel 50 has water resistance for a long time is demonstrated more concretely. First, as the water-soluble paper 10 (water-soluble paper piece 20), for example, a surfactant, a softener, and an antifoaming agent for wood pulp (about 70% of NBKP (coniferous pulp) and about 30% of LBKP (hardwood pulp)). And having an actual basis weight of about 19 g / square m was prepared. In addition, you may use another binder for the coupling | bonding between fibers.

  The water-soluble paper 10 or the water-soluble paper piece 20 itself dissolves in water in several tens of seconds. When this water-soluble paper 10 was tested for “easy to loosen” according to JIS-P4501, the loosening time was about 19 seconds (with softener) to about 26 seconds (without softener). The loosening time will be described. In the test based on the above JIS, the water-soluble paper 10 is a 100 mm square test piece with respect to 500 cc of water in a beaker in a state where the rotation speed is 605 to 610 rpm by a magnet rotor. Throw what you did. The measurement is started when the test piece is once lowered to 540 rpm due to the resistance of the test piece, and the time required for the rotation speed to increase to 600 rpm as the test piece is loosened is the loosening time.

  The width of the water-soluble paper piece 20 was set to 3 to 6 mm, and the fine yarn 30 obtained from the water-soluble paper piece 20 was rolled up at 400 to 750 t (rotation) per 100 cm. Further, the thick yarn 40 was obtained by winding up the three thin yarns 30 together, and the winding up was 400 to 750 t per 100 cm. More specifically, water-soluble paper pieces 20 having widths of 3 mm and 6 mm were prepared. The water-soluble paper piece 20 having a width of 3 mm is for warp and the water-soluble paper piece 20 having a width of 6 mm is for weft. The fine yarn 30 obtained from the water-soluble paper piece 20 was 750 t when the width was 3 mm and 400 t when the width was 6 cm. Further, the thick yarn 40 using the fine yarn 30 made of the water-soluble paper piece 20 having a width of 3 mm is wound up at about 750 t per 100 cm, and the thick yarn 40 using the fine yarn 30 made of the water-soluble paper piece 20 having a width of 6 mm. The roll up was about 400t.

  The towel 50 woven using the thick yarn 40 (using two types of thick yarn 40 for warp and weft) has a width of about 25 cm, a length of about 90 cm, and a thickness of about 1 to It was 2 mm. It took about 60 minutes for the towel 50 to dissolve in water. Moreover, the time for which the towel 50 soaked in water kept strength and shape at least to the extent that it can be used for body washing was about 40 minutes. In addition, the adjustment of the mixing ratio of wood pulp at the stage of the base paper (water-soluble paper 10), the adjustment of the mixing ratio of the material of the binder, the presence or absence of a softening agent, the density and basis weight adjustment, the width of the water-soluble paper piece 20, the fine yarn 30 or the time until the towel 50 is dissolved in water can be adjusted (changed) by adjusting the rotation of the yarn 30 or the thick yarn 40.

  7 and 8 show a preferred example of a towel 50 as a fabric formed by the present invention. That is, in this example, a short folded portion 51 is formed on the entire outer peripheral edge of the towel, and this folded portion 51 is made of water-soluble yarn (in the embodiment, a thin thick yarn 40 for warp yarn is used). Are sewn together (sewing), and the locus of this sewn portion is indicated by the symbol α. Immediately after weaving the towel 50, the outer peripheral edge of the thick yarn 40 is exposed and becomes a part that is easily loosened or soluble in water. However, the structure shown in FIGS. It is possible to prevent the towel 50 from being loosened from its outer peripheral edge or being dissolved in water at an early stage. The process of obtaining the towel 50 as shown in FIGS. 7 and 8 is performed after the step S5 shown in FIG.

  FIG. 9 shows another example in which the outer peripheral edge portion of the towel 50 is processed. In this example, the outer peripheral edge of the towel 50 is crimped by press machines 71A and 71B (only the upper and lower pressing parts are shown), thereby preventing fraying of the outer peripheral edge without additional sewing. It is possible to prevent the peripheral edge from being dissolved in water at an early stage. In the example of FIG. 8, the folded portion 51 is provided, and after crimping, the thickness of the outer peripheral edge portion is substantially the same as that of the other portions (the thickness of the outer peripheral edge portion is obtained by crimping). While the thickness becomes thinner, the density becomes higher). The pressure bonding by the press machines 71A and 71B can be applied even when the folded portion 51 is not provided. During the pressure bonding, steam (steam) can be applied to the outer peripheral edge of the towel 50.

  As processing of the outer peripheral edge of the towel 50 (which may or may not be the folded portion 51), in addition to the cases shown in FIGS. 7 to 9, the paste with natural components (for example, cellulose, starch, etc.) Crimping may be performed. The processing of the outer peripheral edge as shown in FIGS. 7 and 8, the crimping process by the press machines 71A and 71B shown in FIG. 9, and the glue crimping are not limited to towels, but also to other woven fabrics and knitted fabrics. It can be applied to.

  Although the embodiment has been described above, the present invention is not limited to the embodiment, and can be appropriately changed within the scope described in the scope of claims. For example, the invention includes the following cases. . Step S1 in FIG. 6 may not be provided (may not include soap solution, fragrance, bactericidal / antibacterial agent, natural dye, etc.). The present invention can be applied not only to the woven fabric such as the towel 50 but also to knitting. Examples of the fabric or knitting to which the present invention can be applied include diapers (diaper covers), various bags such as shopping bags, yukatas provided in hotels, pajamas, pillow covers, curtains, restaurants, and the like. Dust for eating and drinking (clothes), body wiping for nursing care, clothing, disposable underwear, hand towels (hand towels), hand-washing tools (impregnated with a detergent such as soap), and the like, but are not limited thereto. In addition, for example, by performing a fiber processing agent, secondary processing, or fusing with another fiber yarn, it is possible to deal with materials for various purposes separately. Of course, the object of the present invention is not limited to what is explicitly stated, but also implicitly includes providing what is substantially preferred or expressed as an advantage.

  The present invention is suitable for application to, for example, disposable towels.

10: Water-soluble paper 20: Water-soluble paper piece 30: Fine yarn 40: Thick yarn 50: Towel 60: Nozzle (for water vapor supply)
71A, 71B: Press machine

Claims (9)

A first step of rolling up an elongated water-soluble paper piece to form a twisted fine thread;
A second step in which a plurality of the fine yarns are combined and rolled up to form one strong twisted thick yarn;
A third step of forming a woven or knitted fabric using the thick yarn;
A method for producing a water-soluble woven or knitted fabric. In claim 1,
A method for producing a water-soluble woven fabric or knitted fabric, wherein the hoisting in at least one of the first step and the second step is performed while spraying water vapor. In claim 1 or claim 2,
A method for producing a water-soluble woven fabric or knitted fabric, wherein the water-soluble paper piece is pre-impregnated with at least one of soap, a fragrance, a bactericidal / antibacterial agent and a natural dye. In any one of Claims 1 thru | or 3,
After the third step, the method further comprises a fourth step of folding back the outer peripheral edge of the woven fabric or knitted fabric and sewing the folded portion with a water-soluble thread.
A method for producing a woven or knitted fabric. In any one of Claims 1 thru | or 3,
After the three steps, the method further comprises a fourth step of crimping the outer peripheral edge of the woven fabric or the knitted fabric with a press. The yarn forming the woven or knitted fabric is a twisted thick yarn that is rolled up by combining a plurality of fine yarns,
The thin thread is in the form of a twisted up water-soluble paper strip,
A water-soluble woven or knitted fabric. In claim 6,
The water-soluble fabric or knitted fabric is a water-soluble towel made of fabric,
The outer peripheral edge of the towel is folded, and the folded portion is sewn with a water-soluble thread.
A water-soluble woven or knitted fabric. In claim 6,
The water-soluble fabric or knitted fabric is a water-soluble towel made of fabric,
The outer peripheral edge of the towel is crimped,
A water-soluble woven or knitted fabric. It is said to be a coyori-like thick thread that is rolled up by combining multiple thin threads,
The thin thread is in the form of a twisted up water-soluble paper strip,
Water-soluble yarn characterized by that.

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