JP5165275B2 - Rolling pin - Google Patents

Description

  The present invention relates to a rolling pin. More specifically, the present invention relates to a rolling pin that can be suitably used for industrial wiping tools.

Conventional cotton swabs have a cotton ball part wrapped with natural fiber cotton (cotton) around at least one end of a rod-shaped shaft. It is used for wiping tools. Cotton has a fiber length of about 20 mm to 30 mm and is called short fiber. Furthermore, since it may contain about 50 μm of cotton dust (lint), removal of lint from cotton balls has become a problem for cleaning for industrial use, especially for precision machinery, semiconductors, and optical communications. .
Therefore, the surface of the cotton ball is covered with a foamed resin film or silicone rubber to prevent fuzz and lint from falling off (for example, Patent Documents 1 and 2), and a long fiber such as rayon is applied to the surface of the cotton ball. Wrapped, nylon-flocked, polyester long fiber fabrics, polyester ultrafine fibers, etc. have been proposed. Polyester ultra-fine fibers commercially available for wiping are thin and have a diameter of about 1 μm. In addition, those using ultra-fine foamed polyethylene, those using olefinic pore sponges, those using polyurethane-based foamed sponges, and those using adhesives (for example, Patent Document 3) Etc. have been proposed.
JP 2005-349296 A JP 09-047377 A JP 2005-168711 A

  However, those with long fibers like rayon wrapped around the surface of the cotton ball, those with nylon fibers implanted, etc. have the effect of suppressing the occurrence of lint compared to using only cotton, It cannot be completely prevented. Also, cotton balls coated with a foamed resin film or silicone rubber, or those using the foamed resin itself have low wear resistance, so the worn debris becomes dust, so-called self-dusting problem. Have. Moreover, there exists a thing containing a plasticizer and surfactant on a manufacturing method, and if there exists an elution thing at the time of wiping, it will cause a contamination. In particular, those containing silicone cannot be used in semiconductor applications. Some foams form foams by extracting an inorganic salt containing sodium, and even if sodium ions remain, they cannot be used in semiconductor applications. A material infiltrated with an adhesive has a problem of glue transfer.

In addition, with recent advances in nanotechnology, there has been a demand to wipe off so-called nano-sized dust of 1 μm or less. For example, when optical fibers are connected to each other, if the section of the optical fiber is not sufficiently cleaned, the communication speed is reduced, so that nano-sized dust must be wiped off. However, dust that is smaller than the fiber diameter cannot be wiped off, so those using polyester long fibers or polyester ultra-fine fibers in the cotton ball part have a fiber diameter of about 1 μm, so it is possible to wipe off nano-sized dust. could not.

The present invention is intended to solve the conventional problems as described above, does not generate lint or wear debris, has no eluent such as surfactant, silicone, sodium ion, etc., has no glue transfer, and is conventionally removed. Rolling pin suitable for precision cleaning equipment, semiconductor-related, optical communication-related industrial cleaning tools that can clean nano-sized dust that could not be cleaned (if natural fiber cotton is not used, pseudonym The purpose is to provide “Men”).

As a result of intensive studies in order to solve the above problems, the present inventor has reached the present invention. That is, this invention consists of the following structures (1)-(4).
(1)
At least one end of the shaft has a noodle bulb, noodles bulb has been made only if we form the following fibers 0.5μm or more in diameter 0.05 .mu.m, the fibers, the raw material polymer of the fibers solvent A rolling pin produced by an electrospinning method from a raw material polymer solution dissolved in an aqueous solution.
(2)
The rolling pin according to (1), wherein the fiber is a long fiber.
(3)
The rolling pin according to (2), wherein the long fibers have a length of 200 mm or more.
(4)
The rolling pin according to any one of (1) to (3) above, wherein the concentration of the raw material polymer in the raw material polymer solution is 1 to 30% by weight.

  According to the present invention, no lint or abrasion debris is generated, there is no eluent such as a surfactant, silicone, sodium ion, etc., no glue transfer, and the conventional removal of nano-sized dust that could not be removed It is possible to obtain a rolling pin suitable for industrial cleaning tools such as precision machinery, semiconductors, and optical communications.

  The rolling pin of the present invention has a rolling ball portion formed on at least one end of the shaft. As the shaft, you can use a paper or film coated with adhesive on one side, a core wound around a plastic shaft, a wooden shaft, a metal shaft such as aluminum, a polypropylene shaft, a carbon fiber shaft, etc. It is not limited to these. A shaft having a diameter of about 0.5 mm to 3.0 mm and a length of the shaft of about 100 mm to 200 mm is usually used, but is not limited thereto. The shape of the shaft is not particularly limited.

  The nest ball portion is provided at at least one end of the shaft, such as provided at one or both ends of the shaft. The nest ball part is usually about 12 to 16 mm in length and about 2 to 10 mm in thickness, but is not limited thereto. Further, the shape of the nest ball portion includes a water drop type, a conical shape with a sharp tip, an elliptical shape, a spiral type, and the like, but is not limited thereto.

The nest ball part is mainly formed of fibers having a diameter of 0.01 μm or more and 1 μm or less, more preferably 0.05 μm or less and 0.5 μm or less. This is mainly because in the present invention, the nuclide part may contain some fibers having a diameter of less than 0.01 μm and / or 1 μm or more and fibers having a diameter of less than 0.05 μm and / or 0.5 μm or more. .
From the viewpoint of wiping off the nano-sized dust, the nest ball portion is preferably formed of only fibers having a diameter of 0.01 μm or more and 1 μm or less, more preferably 0.05 μm or less and 0.5 μm or less.

In addition, the fiber uses a polymer (raw polymer) as a raw material, and the following polymers such as thermoplastic polymers and biodegradable polymers are used singly or as a blend of two or more types (polymer blend), and further, an inorganic substance 1 A composite that blends more than one type is used.
Examples of the thermoplastic polymer include polystyrene, polycarbonate, polymethyl methacrylate, polyvinyl chloride, polyethylene terephthalate, nylon 66, nylon 6, nylon 46, polyamide, and polyacrylonitrile. Examples of the biodegradable polymer include polyurethane, polyvinyl alcohol, polylactic acid, polycaprolactone, polyethylene glycol, polylactic glycol, polyethylene / vinyl acetate, polyethylene / vinyl alcohol, polyethylene oxide, and collagen. Examples of the polymer blend include combinations of polyethylene / vinyl alcohol and polylactic acid, polymethyl methacrylate and acrylonitrile, polyaniline and polyethylene oxide, collagen and polyethylene oxide, silk and polyethylene oxide, polyaniline and polystyrene, and the like. Examples of the composite include combinations of polyvinyl alcohol and silica, nylon 6 and montmorillonite, polyacrylonitrile and titanium oxide, polycaprolactone and calcium carbonate, polycaprolactone and carbon nanotube. The above polymers, polymer blends and composites are examples, and are not limited thereto.

For the nest ball part mainly formed of fibers having a diameter of 0.01 μm or more and 1 μm or less, more preferably 0.05 μm or less and 0.5 μm or less, the above-mentioned one type of fiber may be used alone, You may mix and use the fiber of more than a kind.

  Self-assembly method, phase separation method as a method for producing fibers that are mainly formed from fibers with a diameter of 0.01 μm to 1 μm, preferably 0.05 μm to 0.5 μm. Some methods such as electrospinning have been proposed, but the method is not limited in carrying out the present invention. Here, as an example, a method for producing fibers by an electrospinning method will be described.

The electrospinning apparatus is composed of a pointed positive electrode (capillary tube, nozzle; hereinafter, the positive electrode is referred to as a nozzle) and a flat negative electrode (ground electrode). A syringe with a pointed nozzle is often used, but a nozzle with an electrode inserted into a glass capillary is also used. A positive polymer voltage is applied to the raw polymer solution tank with a nozzle attached to the tip, and the syringe part if it is a syringe. Sucked. At this time, if the polymer is a low molecule, it is sprayed into particles and the fiber shape cannot be maintained. In the case of a polymer, a plurality of long fibers (filaments) are sucked toward the negative electrode, and a thin non-woven fiber layer is formed on the electrode.

In the electrospinning method, the raw material polymer of the fibers forming the nest ball part must be in a state dissolved in a solvent. The concentration of the polymer dissolved in the solvent is preferably 1 to 30% by weight. When the concentration is lower than 1% by weight, it is not in the form of fibers but in the form of particles. When the concentration is higher than 30% by weight, the diameter of the fiber exceeds 1 μm.

  Solvents that dissolve the raw polymer of the fibers forming the bulbous part are highly polar solvents such as water, formic acid and dimethylformamide, alcoholic solvents such as ethyl alcohol, methyl alcohol and isopropyl alcohol, carbon tetrachloride, Examples include chloro solvents such as chloroform, ketone solvents such as acetone and methyl ethyl ketone, and aromatic solvents such as toluene and benzene, and a mixture of two or more of these may be used. It will not specifically limit if a raw material polymer can be melt | dissolved uniformly.

In addition, known additives such as a light resistance improver, an antioxidant, and a plasticizer may be added to the raw material polymer solution of the fibers forming the nest ball portion. Examples of light resistance improvers include hindered amines and benzotriazoles. An example of an antioxidant is dibutylhydroxytoluene (BHT). An example of a plasticizer is epoxidized soybean oil. In addition, colorants such as pigments and dyes can be added. Conductive carbon can also be added. Antistatic performance is imparted by adding conductive carbon. A surfactant for preventing static charge can also be added. Various additives can be added as long as the rolling pin does not adversely affect the material to be wiped.

The applied voltage is usually 5 kV to 30 kV. The strength of the applied voltage is also related to the distance from the nozzle to the negative electrode. If the distance is short, a small voltage may be used, and if the distance is long, the voltage needs to have a magnitude corresponding to the distance. In addition, the optimum voltage varies depending not only on the distance but also on the discharge rate from the nozzle, the concentration and viscosity of the raw polymer solution, the type and molecular weight of the raw polymer, and the thickness and quality of the fiber to be spun. It is necessary to select a voltage according to the fiber.

The charged polymer solution exiting the nozzle is sucked toward the negative electrode in the electric field. Normally, the solvent evaporates before reaching the negative electrode, but it may not evaporate depending on the conditions. In this case, the solvent may be evaporated by changing the atmospheric pressure, temperature, or humidity of the environment in which spinning is performed, or by generating an air flow. In addition, since the temperature and viscosity of the raw polymer solution affect the evaporation of the solvent, it is important to set optimum conditions.

Although a long-fiber non-woven fiber can be obtained on the flat plate side of the negative electrode, the shape of the negative electrode is not necessarily a flat plate and may be any shape. For example, it is possible to wind up a long-fiber nonwoven fabric-like fiber while rotating it as a belt-like electrode, and it is possible to obtain a cylindrical long-fiber nonwoven fabric-like fiber in a roll shape. When the disk is rotated at a high speed by arranging the axis passing through the center of the disk perpendicular to the nozzle as a disk-shaped electrode, fibers can be obtained in a state of uniform orientation.

Further, when a mesh-shaped collecting member is inserted between the nozzle and the negative electrode, for example, a long-fiber non-woven fiber is obtained on the collecting member. The collecting member does not need to be in a mesh shape, and does not particularly specify the shape as long as it does not hinder the movement of charges between the nozzle and the negative electrode.

Furthermore, the number of nozzles can be increased, which can increase productivity. When the number of nozzles is increased, the number of raw material polymer solutions used may be one, or two or more raw material polymers may be spun simultaneously.

The fibers thus obtained are mainly formed from fibers having a diameter of 0.01 μm or more and 1 μm or less, more preferably 0.05 μm or more and 0.5 μm or less.

Further, a fiber formed mainly from the obtained fiber having a diameter of 0.01 μm or more and 1 μm or less, more preferably 0.05 μm or more and 0.5 μm or less, or a rolling pin having a rolling ball portion formed from the fiber, It is also possible to remove dust by adsorption by electrification.

  By using a fiber mainly formed from fibers having a diameter of 0.01 μm or more and 1 μm or less, more preferably 0.05 μm or more and 0.5 μm or less, obtained in the present invention, in a rolling ball of a rolling pin, a nano size of 1 μm or less It is possible to clean the dust. Further, since this fiber is a long fiber, lint is not generated. Therefore, it is possible to obtain a rolling pin suitable for wiping precision machines, semiconductors, optical communications, and the like. It can also be used as a normal rolling pin.

  EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples, but the present invention is not limited to these examples.

  Polyacrylonitrile (hereinafter referred to as “PAN”) was dissolved in a solvent dimethylformamide (hereinafter referred to as “DMF”) to prepare a 10 mass% PAN solution. The obtained PAN solution is put into a syringe, and an electrospinning method is performed on an aluminum foil placed on the minus electrode under the conditions of an applied voltage of 20 kV, a distance between the nozzle and the minus electrode of 200 mm, a room temperature of 20 ° C., and a humidity of 40%. Spinning was performed for 3 hours to obtain a long-fiber non-woven fiber.

  The obtained nanofiber nonwoven fabric aggregate was photographed with a scanning electron microscope at a magnification of 10,000 times, and the average value of the diameters of fibers at 20 arbitrary positions was 0.42 μm. A rolling pin having an elliptical ball-shaped portion having a head length of 12 mm and a head diameter of 2.7 mm using the obtained long-fiber non-woven fiber at both ends of a polypropylene shaft having a length of 73 mm and a diameter of 1.5 mm. Created. Moreover, when the cross-section of the optical fiber cable was wiped with the rolling pin, 0.5 μm dust that could not be wiped up until now could be wiped off.

  Polyamide was dissolved in formic acid as a solvent to prepare a 15% by mass polyamide solution. The obtained polyamide solution is put into a syringe, and an electrospinning method is performed on an aluminum foil placed on the negative electrode under the conditions of an applied voltage of 20 kV, a distance between the nozzle and the negative electrode of 200 mm, a room temperature of 20 ° C., and a humidity of 40%. Spinning was performed for 3 hours to obtain a long-fiber non-woven fiber.

  The obtained long-fiber nonwoven fabric-like fibers were photographed with a scanning electron microscope at a magnification of 10,000 times, and the average value of the diameters of fibers at any 20 locations was 0.13 μm. A rolling pin having an elliptical ball-shaped portion having a head length of 12 mm and a head diameter of 2.7 mm using the obtained long-fiber non-woven fiber at both ends of a polypropylene shaft having a length of 73 mm and a diameter of 1.5 mm. Created. Moreover, when the cross-section of the optical fiber cable was wiped with the rolling pin, 0.5 μm dust that could not be wiped up until now could be wiped off.

The photograph figure obtained by image | photographing (10000 times) the surface of the fiber of the long-fiber nonwoven fabric obtained in Example 1 with the scanning electron microscope. The bar obtained in Example 1 The photograph figure obtained by image | photographing (10000 times) the surface of the fiber of the long-fiber nonwoven fabric obtained in Example 2 with the scanning electron microscope.

Explanation of symbols

1 ... axis 2 ... noodle ball

Claims (4)

At least one end of the shaft has a noodle bulb, noodles bulb has been made only if we form the following fibers 0.5μm or more in diameter 0.05 .mu.m, the fibers, the raw material polymer of the fibers solvent A rolling pin produced by an electrospinning method from a raw material polymer solution dissolved in an aqueous solution.   The rolling pin according to claim 1, wherein the fiber is a long fiber.   The rolling pin according to claim 2, wherein the length of the long fibers is 200 mm or more.   The rolling pin according to any one of claims 1 to 3, wherein a concentration of the raw material polymer in the raw material polymer solution is 1 to 30% by weight.

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