JP2010184043A - Wiper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiper as one which is impregnated with a chlorine dioxide solution by which the antiseptic effect and disinfecting effect of chlorine dioxide is hardly reduced. <P>SOLUTION: In the wiper constituted by impregnating the same with the chlorine dioxide solution, the base material of the wiper mainly contains (50% by mass or more of) cellulosic fibers such as of cotton or rayon. Thereby a high chlorine dioxide concentration can be maintained over a long period. Further the deterioration of the wiper itself does not proceed in a certain degree. The wiper can be used for a cleaning and wiping article. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a wiper used when disinfecting fingers, medical equipment, other environmental surfaces, and the like.

  It is known that chlorine dioxide is one of the bactericides and is safe for the human body and can be used as a bactericidal agent for tap water or as a surface sterilizing / disinfecting agent when handling food. Hypochlorous acid does not show bactericidal power against norovirus, but chlorine dioxide shows bactericidal power and is an effective bactericidal agent. In addition, chlorine dioxide is also advantageous in that it does not generate trihalomethane or the like.

  By the way, Patent Document 1 mentions polyester fibers, polyethylene fibers, polypropylene fibers, polyester-polyethylene core-sheath fibers, and polypropylene-polyethylene core-sheath fibers as non-woven fibers impregnated with a chlorine-based disinfectant. And it is described that the gradual decrease in the concentration of the disinfectant can be prevented by eliminating or halving the surfactant adhering to the fiber.

  In addition, in Patent Document 1, when the nonwoven fabric is impregnated with a disinfecting solution, the cause of the gradual decrease in the concentration of the disinfectant is estimated to be due to the use of liquid-absorbing fibers as the fibers constituting the nonwoven fabric.

  On the other hand, Patent Document 2 discloses a case where hypochlorous acid is used, but the surface of the nonwoven fabric impregnated with a hypochlorous acid aqueous solution is vinyl chloride resin, ABS, polyethylene, polypropylene, acrylic resin, fluororesin, polycarbonate. It has been shown to use materials that are difficult to oxidize, such as methylpentene resin and polyurethane.

  It is shown that when the material of the nonwoven fabric is natural fiber, polyamide or polyester, hypochlorous acid is consumed and the sterilizing power is reduced.

  Patent Document 3 introduces that a liquid composition of chlorine dioxide is mixed with a highly water-absorbent resin to form a gel composition. As the above-mentioned highly water-absorbent resin, starch-based water-absorbent resin, cellulose-based water-absorbent resin, A synthetic polymer water-absorbing resin is shown.

JP 2005-13309 A JP-A-9-173427 Japanese Patent No. 3110724 (for example, paragraphs [0035] and [0036])

  Since chlorine dioxide has various advantages as described above, the present inventors have come to consider using it as a cleaning product (for example, a towel) for individual packaging.

  Therefore, the present inventors selected several synthetic resin nonwoven fabrics with reference to Patent Documents 1 and 2, and impregnated them with a chlorine dioxide aqueous solution, followed by follow-up observation. The effect was reduced. Moreover, in patent document 3, it has described comprehensively about the raw material of the superabsorbent resin mixed with a chlorine dioxide liquid agent, and even if it referred to this, an appropriate nonwoven fabric raw material could not be found.

  Therefore, the present invention has been made in view of the circumstances as described above, and an object of the present invention is to provide a wiper impregnated with an aqueous chlorine dioxide solution that is less likely to reduce the sterilization / disinfection effect of chlorine dioxide. is there.

  As described above, Patent Document 1 shows that the concentration of chlorine-based disinfectant gradually decreases when absorbent fibers are used as the fibers constituting the nonwoven fabric, and Patent Document 2 discloses that the nonwoven fabric material is a natural fiber. It has been shown that the sterilizing power of hypochlorous acid is reduced.

  Although cotton is mentioned as a typical example of a liquid-absorbing fiber and a natural fiber, when the present inventors conducted an experiment, in the case of chlorine dioxide aqueous solution, contrary to the above, when the nonwoven fabric impregnated with this is cotton, It was found that there was not much reduction in the disinfection / disinfection effect of the aqueous chlorine dioxide solution even after a long period of time. Rather, some of the materials shown in Patent Documents 1 and 2 as non-woven fabric materials cause a decrease in the concentration of chlorine dioxide.

  In addition, it has been experimentally found that there are materials that cannot be used as wipers because some nonwoven fabrics are weakened by immersion in an aqueous chlorine dioxide solution and become brittle.

  The present invention has been made on the basis of the various experimental results as described above, and the wiper according to the present invention is a wiper impregnated with an aqueous solution of chlorine dioxide, and the wiper material comprises cellulosic fibers. It is characterized by being the subject. The term “mainly” means that the proportion in the wiper is more than 50% by mass.

  That is, in the present invention, the cellulosic fibers preferably occupy more than 50% by mass of the wiper. The content is preferably 80% by mass or more, and most preferably the wiper is composed of only cellulose fibers.

  In addition to the nonwoven fabric, the wiper may be a woven fabric, knitted fabric, cotton or the like.

  Furthermore, in the present invention, the cellulosic fiber is preferably natural cellulose and / or regenerated cellulose. Examples of natural cellulose include cotton, and examples of regenerated cellulose include viscose rayon and cupra.

  According to the wiper of the present invention, the stability of the aqueous chlorine dioxide solution is good, the sterilization / disinfection effect does not decrease so much, and the wiper itself is not significantly deteriorated by chlorine dioxide and can maintain strength. It can be used to clean medical devices and other environmental surfaces.

It is the graph showing the intensity | strength change of the nonwoven fabric at the time of being immersed in chlorine dioxide aqueous solution, (a) is a graph of the intensity | strength change of a vertical direction, (b) is a graph of the intensity | strength change of a horizontal direction. It is the graph showing the intensity | strength change of the nonwoven fabric at the time of being immersed in ion-exchange water, (a) is a graph of the intensity | strength change of the vertical direction, (b) is a graph of the intensity | strength change of a horizontal direction. It is a graph showing the test result about the density | concentration fall of the chlorine dioxide by the influence of a nonwoven fabric raw material. It is a graph showing the test result about the density | concentration fall of the chlorine dioxide by the difference in a wiper form.

  In describing embodiments of the present invention, various experiments will be described.

1. Test on stability of wiper material against chlorine dioxide aqueous solution Assuming that wiper wiper is impregnated with chlorine dioxide aqueous solution and used for wiping products, test whether nonwoven wiper is deteriorated by chlorine dioxide aqueous solution as follows Went.

1-1. Experimental Sample A nonwoven fabric made of polypropylene (hereinafter sometimes referred to as PP), polyethylene terephthalate (hereinafter sometimes referred to as PET), polyamide, viscose rayon, cupra rayon, and cotton was prepared. PP, PET, polyamide, and cupra rayon were made into a nonwoven fabric by a spunbond method, and viscose rayon and cotton were made into a nonwoven fabric by a hydroentanglement method.

1-2. Strength test method Three non-woven fabric samples were cut into 2.5 cm × 20 cm in the longitudinal direction (production flow direction) and the transverse direction (direction perpendicular to the production flow direction). The cut non-woven fabric was put in a glass container, filled with 25 ml of 140 ppm chlorine dioxide aqueous solution, sealed, and stored at room temperature protected from light. About these samples, the tensile test (JIS L 1912 (however, the test piece shall be 2.5 cm × 20 cm as described above)) was performed every elapsed days, and the tensile strength was measured. In addition, it measured about three samples in the tensile test, and made this average the tensile strength. As a comparative control, ion-exchanged water was used instead of the chlorine dioxide aqueous solution, and the same test was performed.

1-3. Test results The results of the strength tests on the various nonwoven fabrics are as shown in Tables 1 and 2, Table 1 shows the tensile strength when immersed in an aqueous chlorine dioxide solution, and Table 2 shows the tensile strength when immersed in ion-exchanged water. . About these results, the strength of the sample nonwoven fabric before being immersed in a chlorine dioxide aqueous solution or ion-exchanged water was assumed to be 100%, and the ratio of the strength change to this was shown in Tables 3 and 4 and FIGS. It is a graph showing intensity change). Of these, Table 3 and FIG. 1 are cases of chlorine dioxide aqueous solution, and Tables 4 and 2 are cases of ion-exchanged water. 1 and 2, (a) is a graph of the strength change in the longitudinal direction of the sample nonwoven fabric, and (b) is a graph of the strength change in the horizontal direction.

  As can be seen from the above results, PP, PET, and polyamide showed a decrease in strength when immersed in an aqueous chlorine dioxide solution as compared with when immersed in ion-exchanged water. In particular, the strength of polyamide was greatly reduced when immersed in an aqueous chlorine dioxide solution, and it deteriorated to the point that it collapsed only by touching after 3 months. On the other hand, when viscose rayon, cupra rayon, and cotton are immersed in a chlorine dioxide aqueous solution, the strength does not decrease much compared to PP, PET, and polyamide, and cellulosic fibers such as rayon and cotton are stable against a chlorine dioxide aqueous solution. It turns out that it is. In addition, in the nonwoven fabric formed by hydroentanglement, it is thought that the cause of strength reduction when immersed in ion-exchanged water is due to swelling of the nonwoven fabric fibers and a decrease in the interlaced strength between the fibers.

2. Test on stability of chlorine dioxide to various wiper materials The stability of chlorine dioxide when various wiper materials were impregnated with an aqueous chlorine dioxide solution was tested as follows.

2-1. Experimental Sample A nonwoven fabric made of PP, PET, polyamide, viscose rayon, cupra rayon, and cotton was prepared in the same manner as in the test in “1.” above.

2-2. Chlorine dioxide stability test method [1]
The nonwoven fabric of the above sample was cut into 2.5 cm × 20 cm. Six of the cut nonwoven fabrics were put in a glass container, filled with 25 ml of a chlorine dioxide aqueous solution, sealed, and stored at room temperature in the dark. About this, the density | concentration of the chlorine dioxide in every elapsed days was measured. The concentration was measured by absorptiometry (absorbance measurement wavelength: 525 nm).

2-3. Test results The results of the stability test of the aqueous chlorine dioxide solution for each nonwoven fabric are as shown in Table 5. When this is represented in a graph, FIG. Become.

  As can be seen from the above results, PP and polyamide have a very low chlorine dioxide concentration, whereas PET has a low concentration reduction, and viscose rayon, cupra rayon, and cotton have almost no chlorine dioxide concentration reduction. There wasn't. From these, it can be seen that chlorine dioxide is stable against cellulosic fibers such as rayon and cotton, and maintains a sufficient sterilizing and disinfecting effect.

3. Test for Stability of Chlorine Dioxide Due to Different Wiper Forms In the test of “2.” above, non-woven fabric was used as the wiper form impregnated with the aqueous chlorine dioxide solution. The following test was conducted as to whether or not this occurs.

3-1. Experimental sample Cotton gauze and absorbent cotton were prepared as test materials.

3-2. Chlorine dioxide stability test method [2]
1 g of the above cotton gauze was placed in a glass container, and 10 ml of an aqueous chlorine dioxide solution was filled therein and sealed. Further, 1 g of the above absorbent cotton was put in a glass container, and 20 ml of an aqueous chlorine dioxide solution was filled therein and sealed. These were stored protected from light at room temperature. As a comparative control, a glass container filled with only 20 ml of a chlorine dioxide aqueous solution and sealed was used. About these, the density | concentration of the chlorine dioxide in every elapsed days was measured. The concentration was measured by absorptiometry (absorbance measurement wavelength: 525 nm).

3-3. Test results The results of the stability test of the aqueous chlorine dioxide solution for each sample are as shown in Table 6, and this is shown in a graph in FIG. 4 (a graph showing the test results for the decrease in the concentration of chlorine dioxide due to the difference in wiper configuration). Become.

  The density change was not so much observed for both cotton gauze and absorbent cotton. It can be seen that chlorine dioxide is stable and sufficiently sterilizing and disinfecting with respect to cotton materials even in the form of woven fabric and cotton in addition to the nonwoven fabric used in the test of “2.”.

4). Embodiment Next, an embodiment of the present invention will be described.

  Polyamide / PVDC is laminated and fused, and the surface of PVDC is coated with emulsion-polymerized latex PVDC to produce a 50 μm thick film. At this time, calcium stearate is used as a lubricant in the PVDC coating layer. This PVDC coat layer does not contain erucamide. Using the laminated film, a 7 cm × 12 cm bag is formed with the PVDC coat layer as the innermost surface layer.

  On the other hand, as a wiper, a nonwoven fabric made of cupra rayon is prepared by a spunbond method, cut into 15 cm × 20 cm, and folded to a size of 5 cm × 10 cm (or rolled into a rod shape). This is impregnated with a 100 ppm chlorine dioxide aqueous solution (amount of impregnation liquid 10 ml).

  The cupra rayon nonwoven fabric impregnated with this aqueous chlorine dioxide solution is placed in the bag and sealed by heat sealing. Since the innermost layer of the bag is PVDC, heat sealing is possible.

  The obtained package is used for individual packaging cleaning supplies. The wiper (nonwoven fabric) contained in the package is sufficiently strong even after 3 months, and the chlorine dioxide concentration of the impregnated chlorine dioxide aqueous solution is also maintained at about 140 ppm or more. As a sterilizing / disinfecting effect.

  As described above, the present invention has been described more specifically with reference to examples. However, the present invention is not limited by the above examples, and may be implemented with appropriate modifications within a range that can meet the above-described purpose. Of course, any of these is also included in the technical scope of the present invention.

  For example, in the above-described embodiment, the nonwoven fabric is shown as the wiper. However, the wiper may be a woven fabric or a knitted fabric, or may be a cotton-like one such as a cotton ball. In addition, although it showed using in the said embodiment as an object for individual packaging wiping supplies, as a utilization form of the package of this invention, it does not restrict to this.

  Moreover, in the said embodiment, although the cupra rayon was shown as a raw material of a wiper, other cellulosic fibers, such as cotton, may be sufficient.

  Although the case where the aqueous solution of chlorine dioxide was packaged was shown in the above embodiment, other than that, chlorine dioxide dissolved in disinfecting alcohol may be used.

Claims (2)

A wiper impregnated with a solution of chlorine dioxide,
A wiper characterized in that the material of the wiper is mainly composed of cellulosic fibers.   The wiper according to claim 1, wherein the cellulosic fiber is natural cellulose and / or regenerated cellulose.

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