JP4751713B2 - Cutlery and surface treatment method used therefor - Google Patents

Description

  The present invention relates to a cutting tool and a surface processing method used therefor, for example, a cutting tool that performs slitting, cutting, half-cutting, slicing, and the like in a production process and a surface processing method used therefor.

  Such blades are conventionally used at predetermined intervals on sheet materials such as resin films, fabrics, paper, nonwoven fabrics, fibers, paperboard, take-up rolls, paper tubes, insulating tapes, adhesive tapes, etc. Used for slitting and separating, and cutting by cutting and slicing. Also, score cut which is so-called push-cut is used for adhesive tape, cloth tape, soft film, rubber and the like. Also known is a blade that is used for half-cutting adhesive paper or the like and cutting a labeler, and slits only the release paper and release film (see, for example, Non-Patent Document 1).

Except for special cases such as ceramics, zirconia, and sapphire, these blades are almost made of iron-based materials. Non-Patent Document 1 normally uses SKH (high speed steel) for the upper blade and SKD (high speed steel) for the lower blade. Tool steel) is used, and as a shear knife (straight blade for cutting) for thin plate, SKD11 which is an alloy steel for cold mold having excellent wear resistance, Rockwell hardness HRC65-67, and for thin plate As the shear knife (straight blade), the SKD11 improved steel, Rockwell hardness HRC 65-67, which is an alloy steel for cold molds with excellent wear resistance, is used as the shear knife (straight blade) for medium thickness plates. A cold-alloy alloy steel with excellent wear resistance, SKD12 improved steel, Rockwell hardness HRC64-67, and a shear knife (straight blade) for thick plates with excellent wear resistance and impact resistance Mold Alloy tool steel SKD61 modified steel, Rockwell hardness HRC60-65, wood veneer knife as alloy tool steel modified gold SKS modified steel, Rockwell hardness HRC60-63, wood slicer, chrome The molybdenum steel improved steel, NTT, Rockwell hardness HRC61-64. Separately, the wood slicer, NLS, rockwell hardness HRC62-65, improved chipwell knife, slicer knife, chrome. Use molybdenum steel NTT, Rockwell hardness HRC60-63, slicer knife, cutter as high speed steel SKH ₃ , Rockwell hardness HRC65-67, cut knife as flat high speed steel there SKH _2, lock It illustrates the use of El hardness HRC65～67.

Non-Patent Document 1 discloses natural diamond (Vickers hardness: 8,000 to 1,000), DLC (Vickers hardness: 3,000 to 5, as surface treatment for superhardening performed for extending the life of blades. 000), GLC (Vickers hardness 2,800-3,200), SIC (Vickers hardness 2,800-), TiN (Vickers hardness 2,200-2,400), TiC (Vickers hardness 3,000-3,500) ), AI ₂ O ₃ (Vickers hardness 2,000 to 2,500), cemented carbide (Vickers hardness 1,500 to 2,000), hard chrome (Vickers hardness 700 to 2,500), hardened steel (Vickers hardness) 500 to 1,000).
"Finishing Machines and Peripheral Technologies-Slitter / Winder / Cutter / Punching Process", 60-64, June 6, 2003 Editorial Planning: Processing Technology Research Group Publisher: Masayoshi Araki Publisher: Processing Technology Research Co., Ltd. Meeting

Meanwhile, cutlery, regardless of the difference in material such that the ceramic or iron-based, as in the cutter b shown in FIG. 7 by the use, dust d are easily attached, such as paper dust and lint, including talc, dust d Depending on the type and amount of attachment, the cutting of the cutter b will be lost, making it impossible to perform operations such as cutting. In particular, the ceramic system has a porous structure due to powder sintering, and also has a recess due to the dropping of binder particles such as cobalt, which is a problem that foreign matter tends to adhere and accumulate.

  For this reason, the dust d is carefully wiped with an organic solvent such as acetone or xylene regularly, for example, about 3 times a day, or once to 10 times an hour depending on the place or application. However, it is bothersome and dangerous. In addition, the use of organic solvents such as acetone and xylene is also a sanitary problem in the case of kitchen paper used for foods such as absorbing oil from fried foods, dropping lids when cooking boiled food, and filter paper.

  In order to avoid these problems, as described in Non-Patent Document 1, a cleaner with a vacuum device is attached to each cutter b, but this also causes a high cost, and the processing device c is further bulky. Become high. Although the dirt can be removed by grinding with a grinder, there is a problem that wear is accelerated.

  Therefore, although the combined use of the grinder and the cleaner with the vacuum device is suitable, the cost of the processing machine c increases rapidly and becomes considerably large. In addition, the space around the cutter b is small and it may be difficult to realize it.

  In particular, the production of short fibers such as wisteria wound around a drum is cut by arranging and cutting about 270 to 300 sheets at intervals of about 2 mm to 8 mm so as to face the drum. In the case of a cutter, it is difficult to work a cleaner or a grinder itself, and the smaller the arrangement interval is, the smaller the arrangement interval becomes, and the fiber waste is likely to accumulate and is repeatedly dumped into a dumpling. There is a problem of degrading the mixed quality, but it is difficult to solve.

Therefore, the present inventor continued research to solve the above problems, and while conducting various experiments and studies, the silica particles fired and adhered to the substrate surface previously provided by the present applicant It has been found that, unlike conventional square angular amorphous silica particles (see, for example, Patent Document 1), it exhibits excellent slipperiness on its adhesion surface. When it was attached to the surface of the blades to help prevent it, it was found that it was difficult to get dirty and did not accumulate.
JP, 10-139486, A (paragraph 0003) The objective of the present invention is based on the above new knowledge, and is providing the cutlery which is hard to become dirty and is hard to accumulate dirt.

In order to achieve the above object, the blades of the present invention have non-angular silica particles scattered on the surface including at least the work area in contact with the workpiece, and the contact angle with the surface is 90. It is characterized in that it adheres at a degree or less . That is, for example, a state in which silica particles fired without angling are scattered and attached to the surface including at least the working area.

In such a configuration, the silica particles not having any sharp angles due baking on the surface of the work area in contact with at least workpiece cutlery is not Mashimashi distributed, reducing the sharpness of the cutlery by it is a microparticle Therefore, from the material and shape characteristics, it exhibits a higher slidability than the ground surface of the cutlery to reduce the frictional resistance at the time of cutting and suppress the adhesion and accumulation of dust such as paper dust and fiber waste.

More specifically, particles of an organic solvent solution of an inorganic polymer that is made of an iron-based metal and has a silicon-nitrogen bonding substance and a hydrogen atom on the surface including at least a work area in contact with the workpiece and is soluble in an organic solvent. Another feature is that the non-angulated baked silica particles from the coating polymer solution are scattered and adhered at a contact angle with the surface of 90 degrees or less .

  In such a configuration, in addition to one feature, the baked silica particles are from a particulate coating polymer liquid and baked in a rounded form due to surface tension, so it is less angular and slips. Properties and dirt prevention function are further enhanced.

In the surface processing method of the present invention, a polymer liquid, which is an organic solvent solution of an inorganic polymer having a silicon-nitrogen bond substance and a hydrogen atom and soluble in an organic solvent, is applied to the surface including at least the working area of the blades by surface tension. It is applied to particles that are not angular, and includes a step of firing the applied particulate polymer solution up to silica in the atmosphere, and the silica particles that are not angular are scattered at a contact angle of 90 degrees or less with the surface. It is characterized by obtaining a surface that includes a work area.

  In such a configuration, the polymer liquid applied in the form of particles adheres to the surface including at least the working area of the blades in a rounded form that is not angular depending on wettability and surface tension, and maintains the form to obtain silica particles. Since it is fired, the round silica particles that are not angular can be scattered in a satin state in a predetermined area.

In this case, in a further configuration, the polymer liquid is applied in a particulate form to the surface including at least the work area by contacting the atomized polymer liquid and the surface including the work area in contact with at least the workpiece of the blades.
When the polymer liquid is atomized, a spherical atmosphere with a particle size of less than the required particle size can be dispersed and floated at an almost uniform density, creating a surface that includes at least the work area of the blades that contacts the workpiece. By contacting, with a dispersion, buoyant density, a contact angle with the surface corresponding to each other's affinity and wettability is 90 degrees or less, the contact angle adheres at a contact angle, and a form that leaves a non-angular roundness Therefore, it is suitable for obtaining a surface in which silica particles having good slipperiness are dispersed.

  The contact between the atomized polymer liquid and the surface including at least the working area is easily realized by exposing the surface including at least the working area to the atomizing atmosphere of the polymer liquid.

  At this time, by exposing the blade surface upward to the atomizing atmosphere of the polymer liquid, the atomized and dispersed polymer liquid particles come into contact with a predetermined surface area of the blades while gently falling naturally. The polymer liquid particles adhere in proportion to the exposure time to the atomizing atmosphere, and the adhesion density increases. At this time, the polymer liquid particles may adhere in double or triple layers, but by setting the polymer liquid to a particle diameter of 50 μm or less, the sharpness of the blades, the adhesion prevention of dirt, and the accumulation prevention are improved. There is no problem.

  However, this polymer liquid can be baked into the silica to form silica, but the water-repellent substance is baked with silicification in the middle of the calcination, and the adhered polymer liquid particles are converted into the above-mentioned polymer liquid particles. After the pre-baking process to produce water-repellent substances, polymer liquid particles are applied so that the water-repellent substances are generated so that they do not repel around the water due to the water repellency of the previous silica particles. It is possible to obtain a dispersed state of high-density silica particles without overlapping by applying and firing to final silica.

  When mixed with antibacterial fine particles having a particle diameter of 300 to 1000 も smaller than the coated particles formed by the polymer liquid to be applied, the polymer liquid retains the antibacterial fine particles and is baked to silica to become a binder and the surface of the blades The antibacterial property can be made to continue to exist.

  Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.

According to cutlery of one feature of the present invention, exhibits at least workpiece silica particles not having any sharp angles on the surface of the work area of contact with Mashimashi dispersed with high slip properties without decreasing the sharpness of cutlery In addition, the work load due to frictional resistance at the time of cutting can be reduced to save energy, and the adhesion and accumulation of dust such as paper dust and fiber waste can be suppressed to reduce maintenance work and thereby reduce the operating rate.

  According to the blades of another feature of the present invention, in addition to the case of one feature, the fired silica particles are further fired in a rounded form utilizing surface tension and wettability in a liquid state. It becomes less angular, and the slipping characteristics and antifouling function are further enhanced.

  According to the surface processing method of the present invention, the polymer liquid particles to be applied are adhered and fired in a non-angular rounded shape utilizing wettability and surface tension, and become non-angular rounded silica particles. It is scattered in a satin pattern in a predetermined area.

  Dispersed as a spherical particle with a particle size equal to or less than the required particle size by atomization of the polymer liquid, forms a floating atmosphere, and adheres at contact angles according to each other's affinity and wettability by contact with the blades. Since it can be fired in a form that leaves a non-angular roundness, a surface on which silica particles with good slip properties are dispersed can be obtained easily and stably.

  Hereinafter, the blades according to the embodiments of the present invention and the surface processing method thereof will be described in detail with reference to the drawings to provide an understanding of the present invention.

This embodiment is mainly intended for various blades made of various materials such as ceramic, zirconia, sapphire, and iron-based metal as described above, which performs slitting, cutting, half-cutting, slicing, etc. in the production process, Although FIG. 4 shows an example of the rotating cutter 2 for cutting the paper tube 1 supported by the receiving roll 4, it is not limited to this. As shown in FIGS. 1B, 2, and 3, the entire surface of the cutters such as the cutter 2 or the work area 2 a, that is, the surface including at least the work area 2 a that comes into contact with the paper tube 1 that is a workpiece. For example, non-angular silica particles 3 are baked, and as an example, they are scattered and attached in a satin-like shape .

In this way, on the surface of the cutters such as the cutter 2 on which the silica particles 3 fired without being angular are scattered, the silica particles 3 are fine particles coated and fired with a particle diameter of a polymer liquid of, for example, 50 μm or less. From the material and shape characteristics of the silica particles 3, the sharpness of the cutters such as the cutter 2 is not deteriorated simply by being scattered, for example, having a satin-like shape. Instead of the ground surface as shown in 3, it exhibits higher slipperiness. For this reason, frictional resistance at the time of cutting of the rotating cutter 1 is reduced, and adhesion and accumulation of dust such as paper dust and fiber waste are suppressed. Moreover, even if the blades are iron-based metal, rusting on the covering surface of the blades by the silica particles 3 is prevented, and the influence of rusting on the periphery and therefore between the silica particle bonding portions is also affected by the silica particle bonding portions. Since it is not affected by rusting from between, rusting of the entire silica particle adhesion area can be suppressed.

  Rust does not rust during continuous use because the surface of the work area in contact with the tool's preference is repeatedly in contact with the workpiece. However, the surface of the work area is easily rusted during the suspension of operation of the processing machine equipped with the blade, and rusting occurs even at night when the humidity is high. In addition, it may occur during weekends and holidays even when it is not humid, and the degree of rusting during a long holiday is high.

  For this reason, it is necessary to rust off relatively frequently, and in order to cope with this, a dedicated grinder for rusting is also installed on the processing machine together with the blades, as shown in FIG. Such a cutter b that cuts the paper tube a may be used for simultaneous cutting by attaching a large number, for example, 9 or 10 pieces, to a single processing machine c, and it is expensive to attach a grinder to each. There is a problem that not only the processing machine c is bulky but also the cutting pitch cannot be reduced. This is manual and laborious and dangerous. Furthermore, removing the rust from the processing machine c increases the risk of handling a large cutter b with a sharp blade all around, so in most cases rusting with the processing machine c installed. During the work, the processing machine c is in a resting state and the operating rate is lowered. Rust removal after a long vacation is particularly problematic because it takes a long time. Moreover, the rust removal by the grinder also causes the wear of the cutter b, resulting in a problem of shortening the life. From such a current situation, according to the rust prevention effect in the present embodiment, such a problem can be greatly reduced.

As a raw material for firing silica, an inorganic polymer (SiH ₂ NH, for example, perhydropolysilazane manufactured by Tonen Corporation) having a silicon-nitrogen bonding substance Si—N and a hydrogen atom H and soluble in an organic solvent is known. . When a polymer solution which is an organic solvent solution of the inorganic polymer is applied and baked in the air, it reacts with moisture and oxygen in the air to obtain high purity silica. For example, when fired at 450 ° C., silica SiO _{2 in} an amorphous state can be obtained. The reaction formula is as follows:
-SiH ₂ NH- + O ₂ → SiO ₂ + NH ₃
-SiH ₂ NH- + H ₂ O → SiO ₂ + NH ₃ + H ₂
Analysis of the atmospheric gas during firing confirms the production of ammonia and hydrogen.

In the IR spectrum of this silica, as shown in FIG. 5, the absorption of siloxane Si—O has grown, and the absorption by components other than silica found in the liquid inorganic polymer to be applied is almost burned out. The silica has a density of 2.1 to 2.2 g / cm ³ , a refractive index of 1.46, a resistivity of about 10 ¹⁵ , a dielectric strength of> 2 × 10 ⁶ V / cm, and a relative dielectric constant of 4.2 @ 1 MHz, visible region light transmittance of 98% or more, and transparency in the film form is equivalent to quartz glass.

  Therefore, the present inventor has obtained a surface state in which the baked silica particles 3 that are not angular are baked by firing the particulate coating polymer liquid applied to the entire surface of the blades such as the cutter 2 or the surface including at least the work area 2a. Got. As a result, the particulate coating polymer liquid is baked in a round form due to surface tension to form silica particles 3 that are more slippery, and the contact angle of the particulate polymer liquid to the surface of the cutter 2 is almost the same. In this case, since the detail portion that captures and collects moisture and dust cannot be obtained because of the small range of 90 ° or less and almost in the range of 40 ° to 50 °, antifouling properties and rust prevention properties are further improved.

  Firing of the silica particles 3 with such a polymer solution includes a polymer solution that is an organic solvent solution of an inorganic polymer having a silicon-nitrogen bonding substance and a hydrogen atom and soluble in an organic solvent, and includes at least the working area of the blades. This is realized by a process in which the surface is applied in the form of particles that are not angular due to surface tension, and the applied particulate polymer solution is baked to the silica in the atmosphere. Silica particles can be dispersed in a predetermined area. Further, such application of the polymer liquid can be easily performed, for example, by contact between the atomized polymer liquid and a surface including at least the work area 2a of the cutters such as the cutter 2. In particular, by atomizing the polymer liquid by spraying or the like, it is possible to create an atmosphere in which the polymer liquid is dispersed and floated at a substantially uniform density as spherical particles having a particle size equal to or smaller than the required particle size. By bringing the surface including at least the work area 2a of the blades into contact with each other, it adheres at a contact angle corresponding to each other's affinity with its dispersion and floating density, and forms a shape that is not angular. Therefore, it is suitable for obtaining a surface in which silica particles having good slipperiness are dispersed. If it is desired to apply only to a specific surface of the cutter such as the cutter 2 in such an application method, the range of the atomizing atmosphere may be limited or a portion other than the specific surface of the cutter such as the cutter 2 may be masked. Good.

  The contact between the atomized polymer liquid and the surface including at least the work area 2a can be easily realized by exposing the surface including at least the work area 2a of the cutter to the atomizing atmosphere of the polymer liquid. When the target surface is facing upward and exposed to the atomizing atmosphere of the polymer liquid, the atomized, dispersed, and floating polymer liquid particles gently come down naturally and come into contact with the specified surface area of the blades. The polymer liquid particles adhere in proportion to the exposure time to the atmosphere, and the adhesion density increases easily. At this time, the polymer liquid particles may adhere in double or triple layers, but there is a problem in sharpness, antifouling properties, and rust prevention properties of the blades by setting the polymer liquid to a particle size of 50 μm or less. There is no. However, as the adhesion density is increased, adjacent particles of the polymer liquid adhering particles aggregate to form a film. If this is not desired, the adhesion density may be limited.

  When the polymer liquid particles are applied by exposing to the atomized polymer liquid with the surface to be applied facing up, the application and baking on the other surface are performed after the application and baking on one surface of the cutter 2. Become.

In the present embodiment, the silica particles 3 are shown in FIGS. 1B and 3 on the surface having the polishing marks 2b of the cutter 2 as shown in FIGS. 1A, 1B, 2 and 3. It is attached as shown. In particular, the embodiment shown in FIG. 3 is characterized in that the silica particles 3 are adhered and formed in the polishing marks 2b to fill the polishing marks 2b with respect to the embodiment of FIG. It has become. An example of the verification of these surface states is as follows. Surface roughness Ra, Ry, Rz of the bare metal in the illustrated example of FIG. The RMS is in units of μm in the lateral direction Ra0.05, Ry0.34, Rz0.28, Sm9.26, S4.00, RMS0.06
Ra0.04, Ry0.31, Rz0.24, Sm6.78, S3.83, RMS0.05 in the vertical direction
And the load length ratio tp (%) is
77.25 in the horizontal direction
25.20 in the vertical direction
Met.

Moreover, the surface roughness Ra, Ry, Rz after attaching the silica particles 3 in the illustrated example of FIG. 1B, the average interval Sm of the unevenness, the average interval S of the local peaks, and the mean square roughness RMS are as follows: ,
Ra0.12, Ry1.33, RZ1.01, Sm9.25, S2.40, RMS0.19 in the lateral direction
Ra0.07, Ry1.31, Rz0.52, Sm14.20, S1.92 and RMS0.13 in the vertical direction
And the load length ratio tp (%) is
17.19 in the lateral direction
13.02 in the vertical direction
Met.

Further, the surface roughness Ra, Ry, Rz of the bare metal in the illustrated example of FIG. 3, the average interval Sm of the unevenness, the average interval S of the local peaks, and the root mean square RMS are as follows:
Ra0.36, Ry2.90, Rz2.17, Sm6.66, S1.67, RMS0.45 in lateral direction
Ra0.36, Ry3.19, Rz1.92, Sm6.91, S1.51, RMS0.47 in the vertical direction
And the load length ratio tp (%) is
48.54 in the horizontal direction
74.74 in the vertical direction
Met.

Further, the surface roughness Ra, Ry, Rz after attaching the silica particles 3 in the illustrated example of FIG. 3, the average interval Sm of the unevenness, the average interval S of the local peaks, and the root mean square roughness RMS are:
Ra0.83, Ry5.74, Rz4.27, Sm12.10, S1.93, RMS1.00 in the horizontal direction
Ra0.69, Ry5.25, Rz3.78, Sm8.49, S2.08, RMS0.69 in the vertical direction
And the load length ratio tp (%) is
44.04 in the horizontal direction
44.40 in the vertical direction
Met.

  As described above, the surface roughness Ra, Ry, Rz, Sm, and RMS after the silica particles 3 are attached are larger than the surface roughness of the bare metal before the silica particles 3 are attached. In any case, the sharpness of the cutter 2 did not deteriorate due to the adhesion of the silica particles 3, and good results that were difficult to accumulate and difficult to accumulate were obtained together with rust prevention, improved maintainability, and 2 mm Even with blades that cut fibers at intervals, clogging of foreign substances and the resulting mixing of fiber lump and cut short fibers were eliminated.

  By the way, the polymer liquid can be baked in the atmosphere to form silica, and the polymer liquid particles adhered thereto are used by utilizing the fact that a water-repellent substance is baked with silicification during the baking. After the pre-baking process to produce water-repellent substances, polymer liquid particles are applied so that the water-repellent substances are generated so that they do not repel around the water due to the water repellency of the previous silica particles. It is possible to obtain a dispersed state of high-density silica particles without overlapping by applying and firing to final silica.

  Specifically, a water-repellent substance is produced together with siloxane in the baking of the polymer liquid up to the silica. This water-repellent substance is, for example, a silicon-hydrogen bond substance Si-H, which repels a newly applied polymer liquid. Such an intermediate substance can be stably obtained by setting the firing temperature to 80 to 200 ° C. and the firing time to 15 to 5 minutes, for example. If the firing temperature is high, the firing time may be short, and if the firing temperature is low, the firing time is long. An example is shown in FIG. 6 and is a spectrum when baking is performed at 80 ° C. for 10 minutes. In FIG. 6, it can be confirmed that the water-repellent substance Si—H is produced together with siloxane.

Therefore, taking advantage of the characteristics of water-repellent substances such as Si-H produced during the silica firing process, the surface of the cutter 2 has a silicon-nitrogen bonding substance Si-N and hydrogen atoms H, which can be used as an organic solvent. A polymer solution (SiH ₂ NH, for example, polysilazane manufactured by Tonen Corporation), which is an organic solvent solution of a soluble inorganic polymer, is applied in the form of particles, and the applied particle-like polymer solution is formed so that a water-repellent substance is generated. A pre-process of performing firing in the air at least once, and applying the inorganic polymer in the form of particles on the surface of the cutter 2 after the pre-process, and the applied particulate polymer liquid and the intermediate by the pre-process A treated surface in which the silica particles 3 are scattered on the surface of the cutter 2 is obtained by a post-process of firing the silica to SiO _{2 in the} air.

  In this case, when the polymer liquid is first applied and baked on the surface of the cutter 2, the particle diameter is made larger than that of the polymer liquid to be applied and baked later, whereby the silica is first applied and baked. The above-mentioned silica particles 3 in which a water-repellent substance is generated in the particulate polymer liquid to be applied later are made easy to increase the particle density, and the water repellency repels the surroundings to cause an upper and lower overlap. While preventing, it is possible to work to fill the gap area where the silica particles 3 do not exist and fill the gap area to increase the density. The water-repellent substance in the previous silica particles 3 is baked into silica in a later step together with the later polymer solution. As a result, the previous silica particles 3 and the subsequent silica particles 3 are bonded to each other by firing onto the surface of the cutter 2 at a substantially single density without overlapping.

  The molecular weight of the inorganic polymer is related to the firing characteristics of the polymer liquid 3a, and the number average molecular weight may be set to about 500 to 4000, and a 20% solution of perhydropolysilazane having a number average molecular weight of 700 to 1500 is used. preferable. Solvents include aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbon hydrocarbon solvents, halogenated hydrocarbons such as halogenated methane, halogenated ethane, and halogenated benzene, aliphatic ethers, and alicyclic ethers. Etc. can be used. Preferred solvents are halogenated hydrocarbons such as methylene chloride, chloroform, carbon tetrachloride, promoform, ethylene chloride, ethylidene chloride, trichloroethane, tetrachloroethane, ethyl ether, isopropyl ether, ethyl butyl ether, butyl ether, 1, 2, dioxyethane, Ethers such as Siooxane, Dimethyldioxane, Tetrahydrofuran, Tetrahydropyran, Pentanehexane, Isohexane, Methylpentane, Heptane, Isoheptane, Octane, Isooctane, Cyclopentane, Methylcyclopentane, Cyclohexane, Methylcyclohexane, Benzene, Toluene, Xylene, Ethylbenzene, etc. Hydrocarbons and the like.

  When these solvents are used, two or more kinds of solvents may be mixed in order to adjust the solubility of the perhydropolysilazane and the evaporation rate of the solvent.

  When the water-repellent substance is a silicon-hydrogen bond substance SiH, according to the knowledge of the present inventors, the baking temperature is preferably 80 to 200 ° C. and the baking time is preferably 15 to 5 minutes. . Taking the firing temperature for such a water-repellent substance and the firing temperature of silica at 450 ° C. as an example, the firing process uses the firing temperature in the previous process to produce the water-repellent substance. It can be understood that the process is performed at a temperature that does not reach the firing temperature, which is preferable in terms of generation efficiency and stability of the water-repellent substance. Examples of water-repellent substances other than those described above include Si-methyl, Si-phenyl, and Si-alkyl fluoride.

  However, the present inventors did not seek critical conditions, and denied the existence of other various firing conditions, other various water-repellent substances, and other polymer liquids for firing the silica having this. Basically, it is not limited to the above.

  If the antibacterial fine particles smaller than the silica particles 3 formed therein are mixed into one or a plurality of predetermined times, for example, the polymer liquid to be finally applied and the silica is baked, the polymer liquid becomes the antibacterial fine particles. It is held and baked to silica particles 3 to become a binder, and antibacterial fine particles can continue to exist on the surface of the cutter 2, so that the antibacterial property can be stably provided, and food and hygiene products are processed. It is valid.

  As such antibacterial fine particles, inorganic particles containing metal ions having antibacterial properties such as Ag, Cu, and Zn are suitable for handling and maintaining antibacterial properties. The smaller the particle size of the antibacterial fine particles, the larger the specific surface area, and the larger the ratio of the antibacterial action surface to the mass, the more advantageous for exhibiting antibacterial properties. Further, it is necessary that the polymer liquid 3a is dispersed without being aggregated. In order to satisfy this requirement, the particle diameter of the antibacterial fine particles 32 is preferably about 300 to 1000 mm, and is dispersed as necessary to prevent aggregation.

  It can be practically used for surface treatment of iron-based metal blades, making it difficult to stain and rust.

It is a surface micrograph figure of an example of the cutter concerning an embodiment of the invention, (a) shows a metal surface and (b) shows a silica particle adhesion surface, respectively. It is sectional drawing of the cutter shown in (b) of FIG. It is a surface micrograph figure of the silica particle adhesion surface of another example of the cutter concerning an embodiment of the invention. It is a perspective view which shows the principal part of the processing machine using the cutter of the example of FIG. 1, and the cutter of the example of FIG. It is IR spectrum figure of the silica obtained by baking a polymer liquid. It is IR spectrum when a polymer liquid is baked at 80 ° C. for 10 minutes. It is a perspective view which shows the principal part of the processing machine which employ | adopted the conventional cutter.

1 Paper tube 2 Cutter 2a Work area 2b Polishing mark 3 Silica particles

Claims (8)

Cutlery characterized in that silica particles fired without being angular are scattered on a surface including at least a work area in contact with a workpiece, and the contact angle with the surface is 90 degrees or less . Non-angular baked silica from a particulate coating polymer solution of an organic solvent solution of an inorganic polymer having a silicon-nitrogen bond material and hydrogen atoms on the surface including at least a work area in contact with the workpiece and soluble in an organic solvent Cutlery characterized in that particles are scattered and adhered at a contact angle with the surface of 90 degrees or less . A polymer solution, which is an organic solvent solution of an inorganic polymer that has a silicon-nitrogen bond material and hydrogen atoms and is soluble in an organic solvent, is applied to the surface including at least the working area of the blades in a particle shape that is not angular due to surface tension. And a step of baking the applied particulate polymer solution to silica in the atmosphere to obtain a surface including at least a working area in which non-angular silica particles are scattered with a contact angle of 90 degrees or less with the surface. A surface processing method for cutlery characterized by the above. The surface treatment method for blades according to claim 3 , wherein the polymer solution is applied in a particulate form to a surface including at least the work area by contact between the atomized polymer liquid and the surface including at least the work area of the blade. The surface processing method for cutting tools according to claim 4 , wherein the contact between the atomized polymer liquid and the surface including at least the work area is performed by exposing the surface including at least the work area to the atomizing atmosphere of the polymer liquid. The surface processing method for blades according to claim 5 , wherein the surface is exposed upward and exposed to an atomizing atmosphere of a polymer liquid. The surface treatment method for blades according to any one of claims 3 to 6 , which is carried out by mixing antibacterial fine particles having a particle diameter of 300 to 1000 小 さ い smaller than the coated particles formed by the polymer solution to be coated. The surface treatment method for blades according to any one of claims 3 to 7 , wherein the polymer liquid is applied with a particle diameter of 50 µm or less.

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