JP2010099565A - Cleaning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning system which is excellent in maintenability, and avoids sticking of an object to be cleaned onto a roller surface even when removing foreign matter attached to a thin object to be cleaned such as a film. <P>SOLUTION: A cleaning roller 11 is brought into contact with a surface S1 of the object to be cleaned S to remove foreign matter T such as dust attached onto the surface S1 of the object to be cleaned S by static electricity. The cleaning roller 11 includes a core metal 11a, a cylindrical inner layer part 11b provided outside the core metal 11a, and a cylindrical outer layer part 11c provided outside the inner layer part 11b, the outer layer part 11c having hardness of 50 or more (JIS-A) and having higher resistance than the inner layer part 11b. A material chargeable with static electricity attracting the foreign matter T attached to the surface of the object to be cleaned S is selected for the material forming the outer layer part 11c of the cleaning roller 11. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cleaning system that can also remove foreign substances adhering to the surface of a thin material to be cleaned such as a film or sheet.

Conventionally, as a cleaning system for removing foreign substances such as dust adhering to the surface of a thin material to be cleaned such as a glass substrate of a flat panel display (FPD) and a laminated film, an adhesive roller has been used and its adhesive strength is improved. There is known one that uses the foreign matter to remove it (see, for example, Patent Document 1).
JP 2008-168188 A

  Such an adhesive roller cannot remove foreign matters having an average diameter of 1 μm or less, and it is difficult to completely remove foreign matters such as dust once adhering to the surface (adhesive layer) of the adhesive roller. Inferior to In addition, since the adhesive roller is pressed against the material to be cleaned to some extent to remove the foreign material, if the material to be cleaned is, for example, a film, the film is not only removed There is a risk of sticking to.

  Therefore, the inventor applies electrophotographic technology and removes foreign matters such as dust from the material to be cleaned by charging the outer peripheral surface of the cleaning roller with static electricity by contact charging. The present invention has been made with the idea that the foreign matter can be removed from the material to be cleaned by the cleaning roller.

  This invention is excellent in maintainability, and even when removing foreign matters (dust etc.) on thin materials to be cleaned such as films and sheets, the foreign materials are removed by avoiding the material to be cleaned sticking to the roller surface. An object of the present invention is to provide a cleaning system that can be used.

  The invention of claim 1 includes a cleaning roller that moves relative to the cleaning material while rotating while contacting the surface of the cleaning material, and removes foreign matters such as dust adhering to the surface of the cleaning material. A cleaning system for removing static electricity by a roller, wherein the cleaning roller is provided with a conductive core rod, a cylindrical inner layer portion provided outside the core rod, and an outer side of the inner layer portion. A cylindrical outer layer portion, the outer layer portion has a hardness of 50 ° or more (JIS-A) and has a higher resistance than the inner layer portion, and the material forming the outer layer portion of the cleaning roller is It is characterized in that it can be charged with a charge for adsorbing foreign matter adhering to the surface of the material to be cleaned. Here, the reason why the hardness of the outer layer portion is 50 ° or more is that if it is less than 50 °, if the material to be cleaned is a thin material such as a film, the cleaning roller may involve it. It is. Moreover, the material which forms an inner layer part and an outer layer part is selected from the materials (for example, polymeric material) except a metal. The outer layer portion preferably has a hardness of 60 ° or more.

  In the present specification, “high resistance” means high electrical resistance. Further, the hardness of the outer layer portion is measured using a flat plate having a thickness of 2 mm formed from a material forming the outer layer portion.

  In this way, the outer layer portion of the cleaning roller has a higher resistance than the inner layer portion, and is made of a material that can charge a charge that can adsorb foreign matter adhering to the surface of the material to be cleaned. And the foreign matter adhering to the material to be cleaned can be adsorbed to the roller surface by utilizing static electricity and removed from the surface of the material to be cleaned.

  In this way, since the foreign matter is merely adsorbed to the roller surface by static electricity, residual foreign matter can be easily removed from the roller surface by wiping the outer peripheral surface of the cleaning roller with water or alcohol. Compared with the cleaning system used as a cleaning roller, the maintainability is excellent.

  Moreover, since the cleaning roller has a high hardness of 50 ° or more in the outer layer portion and the roller surface hardness is increased, the adhesiveness of the roller surface can be reduced. Therefore, even if the material to be cleaned is a thin material such as a film or a sheet, the surface of the material to be cleaned can be cleaned by preventing the material to be cleaned from being wound around the roller.

  Furthermore, since the conventional adhesive roller requires the addition of a softening agent, oil, etc. in order to reduce the hardness, there is a problem that bleeding of these additives occurs on the surface of the adhesive roller. However, the cleaning roller has an outer layer portion. Since the hardness is 50 ° or higher and it is not necessary to reduce the hardness, it is advantageous in improving the problem of bleeding that occurs in the adhesive roller.

  In this case, as described in claim 2, it is desirable that the inner layer portion has a lower hardness than the outer layer portion.

  In this way, the inner layer portion can be made to have a lower hardness than the outer layer portion. Therefore, even if the outer layer portion has a hardness of 50 ° or more, the hardness of the entire roller is as low as that of the conventional roller. The hardness can be maintained to ensure the nip width, and the occurrence of a situation in which foreign matter is caught and the cleaning material is damaged can be avoided.

  In this case, as described in claim 3, the inner layer portion may be formed of a conductive elastic material, and the outer layer portion may be formed of acrylic mixed urethane or fluorine mixed urethane.

  In this way, the dielectric polarity can be adjusted when urethane with high dielectric properties is used on the outer peripheral surface of the roller. Foreign matter that is easily charged is easily removed from the material to be cleaned.

  According to a fourth aspect of the present invention, it is desirable that a dielectric filler is mixed in the material forming the outer layer portion.

  In this case, the dielectric filler is mixed, so that the electrostatic capacity of the roller surface is increased, and the roller surface is required due to contact with the cleaning material moving relative to the cleaning roller or frictional charging. Charges are easily held, which is advantageous for adsorbing foreign matter on the roller surface and removing it from the material to be cleaned.

  According to a fifth aspect of the present invention, it is desirable that a voltage capable of charging a charge that attracts the foreign matter by static electricity to the outer peripheral surface of the roller is applied to the core of the cleaning roller.

  In this way, since a voltage for charging a charge for attracting foreign matter is applied to the outer peripheral surface of the roller, a high potential required to attract the foreign matter to the roller surface is easily maintained. Therefore, it is advantageous in adhering foreign matter to the roller surface by static electricity and removing it from the material to be cleaned.

  According to a sixth aspect of the present invention, in the cleaning roller, the inner layer portion is electrically conductive, while the outer layer portion is insulative, and the cleaning roller is disposed on the opposite side of the cleaning material. A guide roller is disposed, and the guide roller includes a conductive core rod, an inner layer portion having conductivity on the outside of the core rod, and an outer layer portion having insulation on the outer side of the inner layer portion, A voltage is applied to the core rod of the guide roller and the core rod of the cleaning roller such that one of the both core rods has a higher potential than the other.

  In this way, the two rollers are opposed to each other with the material to be cleaned interposed therebetween, and the electric field strength is highest at the position where the material to be cleaned contacts the cleaning roller and the guide roller. Then, charged foreign matter on the material to be cleaned is attracted to the cleaning roller and removed in accordance with the applied electric field.

  In the present invention, the outer layer portion of the cleaning roller has a higher resistance than the inner layer portion and is made of a material capable of charging a charge that can adsorb foreign matter adhering to the surface of the material to be cleaned by static electricity. In addition, foreign matters such as dust can be adsorbed by static electricity and removed from the surface of the material to be cleaned.

  In addition, since the cleaning roller has a high hardness of 50 ° or more in the outer layer portion and the roller surface hardness is increased, the adhesiveness of the roller surface is lowered, and even if the material to be cleaned is a thin object such as a film or sheet, It is possible to prevent the thin material to be cleaned from being wound around the roller and perform cleaning.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an explanatory diagram of the principle of removing foreign matters such as dust using static electricity according to an example of a cleaning system according to the present invention.

  As shown in FIG. 1, the cleaning system 1 includes a cleaning roller 11 (charged body) that moves relative to the material to be cleaned while rotating while contacting the surface S1 of the material S to be cleaned. Foreign matter T (conductor or dielectric) such as dust adhering to the surface S1 of the material to be cleaned S is removed using static electricity. In the cleaning system 1, although not specifically illustrated, the material to be cleaned S before cleaning is carried into a portion where the cleaning roller 11 is disposed by a first transport unit (not shown). The cleaned material S after being cleaned is carried out by a second conveying means (not shown). In addition, not only when the material to be cleaned S is conveyed in this way, but conversely, the cleaning roller 11 moves relative to the material to be cleaned S supported in a stationary state so that the surface S1 is cleaned. Of course you can also.

The cleaning roller 11 includes a conductive metal core 11a (core bar), a cylindrical inner layer portion 11b provided outside the metal core 11a, and a resistance higher than that of the inner layer portion 11b provided outside the inner layer portion 11b. And a thin cylindrical outer layer portion 11c (for example, about 30 μm thick) made of the above material, and has a two-layer structure. Here, the thickness of the outer layer portion 11c is preferably 2 to 500 μm (more preferably 5 to 50 μm). This is because if the thickness of the outer layer portion 11c is less than 2 μm, the roller surface (outer layer surface) tends to be less likely to be charged. On the other hand, the thickness exceeding 500 μm is not industrially efficient. In place of the cored bar 11a, a cored bar made of a conductive carbon material, synthetic resin composite, or the like can be used. The volume resistance of the core rod is desirably 10 ⁷ Ωcm or less.

The material used for the inner layer portion 11b has a lower hardness or substantially the same hardness as the outer layer portion 11c. The electrical characteristics of the material used for the inner layer portion 11b are not particularly limited as long as the resistance is lower than that of the outer layer portion 11c, and it may be dielectric or conductive. The surface resistance is preferably about 10 ¹⁰ to 10 ¹² Ω / □. However, the resistance is preferably higher than that of the core rod 11a. Specifically, for example, polyester urethane containing carbon (conductive material), which is an elastic material having conductivity, can be used for the inner layer 11b.

The material used for the outer layer portion 11c has a hardness of 50 ° or more (desirably 50 ° or more and 100 ° or less, more desirably 55 ° or more and 100 ° or less, and further desirably 65 ° or more and 100 ° or less). The outer layer portion 11c has a higher resistance than the inner layer portion 11b. The outer layer portion 11c preferably has a surface resistance of 10 ⁸ Ω / □ or more, more preferably a surface resistance of 10 ¹⁰ Ω / □ or more, and even more preferably a surface resistance of 10 ¹¹ Ω / □ or more.

  As the material forming the outer layer portion 11b of the cleaning roller 11, a material capable of charging a charge that adsorbs foreign matter T such as dust adhering to the surface S1 of the material to be cleaned S due to static electricity is selected. That is, it is only necessary that a potential difference is generated with respect to the electric charge charged on the foreign matter T, and the foreign matter T is selected so that the charging sequence is on the plus side or the minus side.

  In addition, although what kind of electric charge is charged to the foreign matter adhering to the cleaning material S can usually vary depending on the type of the cleaning material, the outer layer portion 11b depends on the type of the cleaning material. The material used for can be selected.

  Preferable examples of the material forming the outer layer portion 11c of the cleaning roller 11 in the present invention include urethane resin, and acrylic mixed urethane or fluorine mixed urethane. Here, “acrylic mixed urethane” means an acrylic resin (for example, a graft compound in which an aminoethyl group is grafted to a main chain composed of a methacrylic acid-methyl methacrylate copolymer) and a urethane resin (for example, polyester polyurethane or poly "Polyurethane mixed urethane" is mainly composed of polyurethane and supported on a fluorine group (for example, a polymer mainly composed of carbon) to form a copolymer with polyurethane. And a synthetic resin supported on a polymer mainly composed of carbon and having an isocyanate group (for example, a copolymer containing a polyfunctional block isocyanate).

  According to the cleaning roller 11 described above, the cleaning roller 11 comes into contact with the foreign matter T adhering to the material to be cleaned S to be cleaned, so that the foreign matter T is different from the outer peripheral surface of the cleaning roller 11 by electrostatic induction. The electric charge is charged and an attractive force is generated between the foreign matter such as dust, the foreign matter is adsorbed on the surface of the outer layer portion 11b by static electricity, and the foreign matter is removed from the surface of the material to be cleaned.

  Further, when both the outer layer portion 11c and the inner layer portion 11b are made of a dielectric, as shown in FIG. 2, the surface charge density in the outer layer portion 11c becomes relatively small, the outer layer portion 11c is made a dielectric, and the inner layer portion 11b is made a dielectric. In the case of a conductor, as shown in FIG. 3, the surface charge density in the outer layer portion 11c is relatively large.

  Next, test results regarding the performance of the cleaning roller will be described. Here, in Examples 1 to 9, the inner layer portion is composed of polyester-based urethane containing 40 vol% of carbon (conductive material), and in Examples 10 and 11, the inner layer portion is composed of polyester-based urethane not containing carbon. In Examples 1 to 11, the outer layer portion is made of thermoplastic polyurethane, and in Examples 2 to 11, the outer layer portion includes the additives described in Tables 1 and 2, respectively. In Example 13, the inner layer portion is made of butyl rubber and the outer layer portion is made of thermoplastic polyurethane, and in Example 14, the outer layer portion does not contain a conductive material. However, “fluorine” means a urethane / fluorine copolymer, “acryl” means an aminoethylated acrylic polymer, and silicon acrylic means a silicon / acrylic copolymer resin. The outer layer portion of Example 3 is a mixture of thermoplastic polyurethane and acrylic resin (aminoethylated acrylic polymer) in a ratio of 60:40.

Comparative Example 1 has no outer layer portion, and is a roller having a single layer structure made only of polyester-based urethane containing carbon, which is conveniently described as the inner layer portion, and Comparative Example 2 is also a roller having a single layer structure only made of butyl rubber. In Example 3, 40 phr of carbon and 1 phr of an ion conductive functional antistatic agent (for example, Sanconol MEK-10R manufactured by Sanko Chemical Co., Ltd.) were added as the outer layer conductive material. In Comparative Examples 4 to 6, there is no outer layer portion, and the hardness is changed. In addition, as a dimension of the roller of the said Example and the said comparative example, all the outer diameters were 40 mm diameter, and the length of the part except a metal core was 250 mm.
(Roller hardness-adhesion test)
The adhesion to the PET film was measured using a PICMA tack tester (manufactured by Toyo Seiki Seisakusho Co., Ltd.). Here, the test conditions were a width of 15 mm, a pressing force of 500 g, a pressure bonding time of 10 s, and a peeling speed of 100 cm / min. Here, each hardness was JIS-A hardness, inner layer hardness and outer layer hardness were 2 mm thick sheets, and roller hardness was measured with a roller having a predetermined structure.

From the results shown in Table 1, the outer layer hardness is higher than the inner layer hardness, and the roller hardness of the entire roller is maintained at a low hardness (that is, approximately the same as the inner layer hardness). It can be seen that by increasing the (hardness), the adhesion force (tack force) on the roller surface decreases.
(Waste wipe cleaning test)
A cloth waste containing water or alcohol (ethanol) was reciprocated once against the roller surface to which foreign matter had adhered, and was wiped with water or alcohol (ethanol). After washing with water, residual foreign matter after alcohol washing was compared.

From the results shown in Table 2, in Examples 1 to 9 and 13, when the roller surface is wiped and washed with water or alcohol, foreign matter can be reliably removed in both cases of water and alcohol. I understand. Therefore, there is no residual foreign matter after water washing and alcohol washing, and the maintenance is excellent. This can be easily removed because the adhesion force on the roller surface is not an adhesive force but an electrostatic adsorption force.
(Film sticking test)
The film was rolled on a PET film (thickness 100 μm, 50 μm) electrostatically applied on a flat plate by applying a load of 1 kg to the roller, and the presence or absence of winding of the film was examined.

From the results shown in Table 3, it can be seen that when the surface hardness decreases (see Table 2), the film is wound around the roller.
(Foreign substance removal performance test 1-roller surface potential measurement test)
A foreign matter (fine particles having an average diameter of 10 μm, 1 μm, and 0.5 μm) was sprayed on the PET film, and a roller with a load of 1 kg was rolled to perform a foreign matter removal test. Further, the surface potential of the roller outer peripheral surface at this time was measured.

  From the results in Table 4, it can be seen that the foreign matter removal performance changes when the resistance value of the outer layer portion changes. That is, if the resistance value of the outer layer portion is smaller than the resistance value of the inner layer portion, foreign matters having diameters of 0.5 μm and 1 μm cannot be removed, and it is difficult to remove foreign matters having a diameter of 10 μm.

By mixing a high dielectric constant additive (for example, barium titanate ε s = 1200, titanium oxide ε s = 83 to 183, etc.) (see Tables 1 and 2), the dielectric property of the outer layer portion is enhanced.
(Ionization potential roller surface potential measurement test)
The ionization potential of the roller outer peripheral surface was measured using a photoelectron spectrometer AC-1 (Riken Keiki Co., Ltd.). Further, the surface potential of the roller outer peripheral surface when a roller loaded with 1 kg was rolled onto a PET film was measured. Here, fluorine is a urethane / fluorine copolymer, and acrylic is an aminoethylated acrylic polymer.

From the results in Table 5, it can be seen that the charging property of the roller outer peripheral surface can be controlled by the addition of an additive.
(Foreign substance removal performance test 2)
Sprinkle hair as a foreign object (human hair: 300 μm long), acrylic resin (100 μm large), styrene resin (100 μm large), Teflon (100 μm large) on a PET film and roll a roller with a load of 1 kg. A foreign matter removal test was conducted.

It can be seen that there are substances that tend to cause a potential difference depending on the charge polarity of the substance, and materials that are difficult to generate, and the cleaning properties are different.
(Foreign substance removal performance test 3)
Sprinkle hair (human hair: 300 μm), acrylic resin (100 μm size), styrene resin (100 μm size), Teflon (100 μm size) as a foreign material on a PET film, roll a roller under a 1 kg load, A removal test was performed. However, at this time, an external power source was used for the roller metal core, and a voltage of +1 kV and −1 kV was applied. Also, the roller chargeability was measured. The results are shown in the following Table 7 in comparison with the results of the foreign matter removal performance test 2.

  By applying a voltage from the outside, a stable potential difference is generated between the foreign matter and a system design having a high cleaning property becomes possible.

It can also be seen that the adsorbed foreign matter can be released when the sign of the voltage applied from the outside is opposite in polarity to the sign generated by frictional charging (see * in Table 7).
(Damage test)
Glass powder was sprayed on the PET film, and a roller with a 5 kg load was rolled to check the scratches on the PET film.

  From Table 8, scratches occur when the hardness of the urethane single layer rollers of Comparative Examples 4 to 6 is increased, but in Example 1, an outer layer portion having higher hardness is provided outside the inner layer portion having low hardness. However, it can be seen that the entire roller can maintain a low hardness and can prevent the occurrence of scratches.

  In the above embodiment, the cleaning roller 11 is brought into contact with the surface S1 of the material S to be cleaned and the surface S1 side is cleaned, but only the back surface S2 side may be cleaned. In the case where only the surface S1 side needs to be cleaned, it is also possible to arrange a guide roller 21 on the opposite side of the cleaning roller 11 with the material to be cleaned S interposed therebetween, as shown in FIG. In this case, the guide roller 21 includes a cored bar 21a, an inner layer part 21b having conductivity on the outer side of the cored bar 21a, and an outer layer part 21c having insulating properties on the outer side of the inner layer part 21b. The cored bar 21a, inner layer part 21b and outer layer part 21c of the guide roller 21 can be formed by using substantially the same material as the cored bar 11a, inner layer part 11b and outer layer part 11c of the cleaning roller, for example. A voltage is applied to each of the cores 21a and 11a so that the potential of the cored bar 21a of the layer guide roller 21 is lower than the potential of the cored bar 11a of the cleaning roller 11 or vice versa.

  In this case, the two rollers 11 and 21 are opposed to each other with the material to be cleaned S interposed therebetween, and the electric field strength becomes highest at the position where the material to be cleaned S contacts the cleaning roller 11 and the guide roller 21. In accordance with the applied electric field, the charged foreign matter on the cleaning material S is adsorbed to the outer peripheral surface of the cleaning roller 11 by static electricity and is effectively removed from the cleaning material S.

  In addition, as shown in FIG. 5, a transfer roller 31 may be provided on the opposite side of the cleaning roller 11 from the material to be cleaned S so that the foreign matter adhering to the cleaning roller 11 is transferred to the transfer roller 31. It is. The transfer roller 31 includes a cored bar 41a, an inner layer part 41b having conductivity on the outer side of the cored bar 41a, and an outer layer part 41c having an insulating property on the outer side of the inner layer part 41b. The cored bar 31a, inner layer part 31b, and outer layer part 31c of the transfer roller 31 can also be formed using, for example, substantially the same material as the cored bar 11a, inner layer part 11b, and outer layer part 11c of the cleaning roller. By adding an additive to the outer layer portion 31c, the outer peripheral surface of the outer layer portion 31c can be charged with a charge that adsorbs foreign matter adhering to the outer peripheral surface of the cleaning roller 11 due to static electricity. That is, the foreign matter adhering to the outer peripheral surface of the cleaning roller 11 can be transferred (moved) to the outer peripheral surface of the transfer roller 31 between the outer peripheral surface of the transfer roller 31 and the outer peripheral surface of the cleaning roller 11. A potential difference is generated. Therefore, when the foreign matter adhering to the outer peripheral surface of the cleaning roller 11 reaches the vicinity of the transfer roller 31 by the rotation of the cleaning roller 11, it is transferred (moved) from the cleaning roller 11 to the transfer roller 31. The foreign matter is removed from the surface, and it is maintained that the cleaning roller 11 does not attract the foreign matter to the outer peripheral surface.

  In this case, as indicated by a chain line in FIG. 5, the cleaning roller 11 for cleaning the back surface S2 side on the back surface S2 side of the material to be cleaned S corresponding to the cleaning roller 11 or the transfer roller 31 on the front surface S1 side. It is also possible to provide the transfer roller 31 and simultaneously clean the front and back surfaces S1, S2 of the material to be cleaned S. If the cleaning roller 11 and the transfer roller 31 are not provided on the back side, the above-described guide roller can be provided.

  Specifically, the cleaning system shown in FIG. 5 may have a structure shown in FIG. 6 as an example in the case of having a cleaning roller and a transfer roller. That is, on the upstream side of the cleaning portion W constituted by the cleaning roller 11 and the transfer roller 21, a material to be cleaned S (for example, a belt-like film) before cleaning by a plurality of round belts 25a, driving rollers 25b, and driven rollers 25c. An upstream belt conveyor 25 is disposed, and a downstream belt conveyor 26 is disposed on the downstream side. The downstream belt conveyor 26 conveys the cleaning material S after cleaning by a plurality of round belts 26a, driving rollers 26b, and driven rollers 26c. Yes. The reason why the round belt 26a is used is to reduce the number of contact portions with the material to be cleaned S and to avoid the adhesion of foreign matters. A specific configuration of the drive system of the cleaning unit W and the conveyors 25 and 26 is not shown.

  Further, as shown in FIG. 7, a charging roller 41 is provided on the upstream side of the cleaning roller 11, and a charge having a certain potential difference with respect to the charge charged on the foreign matter T (that is, the foreign matter can be adsorbed by static electricity). It is also possible to charge the outer peripheral surface (outer layer portion) of the cleaning roller 11 in advance and assist the outer peripheral surface of the cleaning roller 11 to be charged with a predetermined charge. The charging roller 41 includes a cored bar 41a to which a voltage is applied, an inner layer part 41b having conductivity on the outer side of the cored bar 41a, and an outer layer part 41c having insulation on the outer side of the inner layer part 41b. . The cored bar 41a, inner layer part 41b and outer layer part 41c of the charging roller 41 can also be formed using, for example, substantially the same material as the cored bar 11a, inner layer part 11b and outer layer part 11c of the cleaning roller, respectively. By applying a predetermined voltage to the core metal 11a, the outer peripheral surface of the outer layer portion 41c is brought into contact with the outer peripheral surface of the cleaning roller 11, so that charges that can adsorb foreign matter to the outer peripheral surface of the cleaning roller 11 due to static electricity. It is designed to be charged. Also in this case, on the back surface S2 side of the material to be cleaned S, the cleaning roller 11, the transfer roller 31 and the cleaning roller 11 for cleaning the back surface S2 side corresponding to the cleaning roller 11, the transfer roller 31 and the charging roller 41 on the front surface S1 side. It is possible to provide the charging roller 41 and simultaneously clean the front and back surfaces S1 and S2 of the material to be cleaned S, or to provide the above-described guide roller.

It is explanatory drawing of the principle which removes foreign materials, such as dust, using static electricity by an example of the cleaning system which concerns on this invention. It is an image figure at the time of making an outer layer part and an inner layer part into a dielectric material. It is an image figure when an outer layer part is a dielectric and an inner layer part is a conductor. It is explanatory drawing in the case of using a guide roller with respect to a cleaning roller. It is explanatory drawing in the case of using a transfer roller with respect to a cleaning roller. It is a schematic block diagram of the whole cleaning system also including a conveyance system. It is explanatory drawing in the case of using a transfer roller and a charging roller with respect to a cleaning roller.

Explanation of symbols

S Cleaning Material T Foreign Material 1 Cleaning System 11 Cleaning Roller 11a Core Bar 11b Inner Layer Part 11c Outer Layer Part 21 Guide Roller 21a Core Bar 21b Inner Layer Part 21c Outer Layer Part

Claims (6)

A cleaning roller that moves relative to the material to be cleaned while rotating while contacting the surface of the material to be cleaned is provided, and foreign matter such as dust adhering to the surface of the material to be cleaned is electrostatically utilized by the cleaning roller. A cleaning system to remove,
The cleaning roller includes a conductive core rod, a cylindrical inner layer portion provided outside the core rod, and a cylindrical outer layer portion provided outside the inner layer portion, and the outer layer portion includes 50 Having a hardness of more than ° (JIS-A) and higher resistance than the inner layer part,
The cleaning system is characterized in that the material forming the outer layer portion of the cleaning roller is capable of charging a charge that adsorbs foreign matter adhering to the surface of the cleaning material by static electricity.
The cleaning system according to claim 1, wherein the inner layer portion has a lower hardness than the outer layer portion.
The cleaning system according to claim 1 or 2, wherein the inner layer portion is formed of an elastic material having conductivity, and the outer layer portion is formed of acrylic mixed urethane or fluorine mixed urethane.
The cleaning system according to claim 1, wherein a dielectric filler is mixed in the material forming the outer layer portion.
5. The cleaning system according to claim 1, wherein a voltage capable of charging the outer peripheral surface of the cleaning roller with a charge that adsorbs the foreign matter due to static electricity is applied to the core of the cleaning roller.
In the cleaning roller, the inner layer portion has conductivity, while the outer layer portion has insulation.
A guide roller is disposed on the opposite side of the cleaning roller across the material to be cleaned,
The guide roller includes a core rod having conductivity, an inner layer portion having conductivity on the outside of the core rod, and an outer layer portion having insulation on the outside of the inner layer portion,
The voltage is applied to the core rod of the guide roller and the core rod of the cleaning roller so that one of the both core rods has a higher potential than the other. A cleaning system according to the above.

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