JP2000089629A - Image peeling member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an image peeling member capable of easily recycling an image recording body in an office or at home and maintaining excellent image peeling performance over a long term by providing a specified adhesive layer between heat resistant base material and an image peeling layer. SOLUTION: An image peeling belt 1 being the image peeling member is equipped with the heat resistant base material 2, the adhesive layer 3 formed on the upper surface of the base material 2, and the image peeling layer 4 formed on the layer 3. Resin material such as polyethylene terephthalate or polyamide-imide is mentioned as the material of the base material 2. The layer 3 incorporates material constituting the base material 2 and thermally melt resin. Thermoplastic material such as styrene resin or vinyl resin is mentioned as the thermally melt resin. The layer B includes material having affinity and compatibility to image forming material. It is desirable to use the resin the same as the resin used for the image forming material as the material having the affinity used for the layer 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electrophotographic copying machine,
The present invention relates to an image peeling member for peeling an image forming material from an image recording material used in an electrophotographic apparatus such as a printer and a facsimile and reproducing the image recording material.

[0002]

2. Description of the Related Art Paper is the most familiar image recording material generally used at present. In recent years, global environmental problems have surfaced and the importance of protecting forest resources has been recognized, and reducing the use of wood resources as paper raw materials has become an important issue. As part of measures to reduce the use of wood resources, the use of used paper as recycled paper without being incinerated is being promoted. However, there are many problems in turning recovered paper into recycled paper.

[0003] For example, in the recovery of used paper, there are problems such as leakage of confidential documents and confidential data of companies and the like, labor and transportation such as sorting and collecting according to the type of paper, and collecting and collecting collected used paper and its management.

Further, in the recycling of used paper, in order to disintegrate the used paper and re-pulp it, the fibers of the pulp are shortened, the quality of the recycled paper is degraded, and a deinking apparatus for removing ink or the like in an unnecessary image portion is used. Is necessary. Also,
A papermaking system for producing paper again from recycled pulp is large, complicated and expensive, so that it is not easy to recycle waste paper in offices and homes.

[0005] Unless these separation and collection, transportation, accumulation, and regeneration are performed efficiently, energy is consumed in large amounts and CO ₂ emissions are increased. As a result, this is one of the global environmental problems. Global warming could be further exacerbated.

On the other hand, from the viewpoint of reducing the use of petroleum resources, it is important to reuse plastics and the like. As an image recording medium made of plastic, there is an OHP (overhead projector) film used for giving a lecture, a conference, or the like, or giving a presentation. But,
OHP films are provided with a thin image-receiving layer to firmly fix the image-forming material on the film surface. At present, only the image-forming material can be used without damaging the image-receiving layer.
Since it is difficult to remove from the HP film, many of them are discarded in a single use.

[0007] In order to solve such a problem, various methods and apparatuses for peeling off an image on an image recording medium such as paper or plastic film once used by using an image peeling member and reproducing the image recording medium. Examples thereof include those described in the following publications.

[0008] JP-A-1-297294, JP-A-2-5
No. 5195 and JP-A-4-64472 disclose an image formed on an image recording material formed of a material that does not impregnate an image forming material or an image recording material surface-treated with a release agent, and a thermoplastic resin having a surface formed of a thermoplastic resin; For example, an image peeling member formed of the same resin as the image forming material, or an image peeling member having an adhesive or the like having an adhesive property at a lower temperature than these resins is superimposed on an image peeling member, heated, cooled, and then cooled. There is disclosed an image peeling method for peeling an image forming material from an image. However, in these methods, in order to peel the image forming material from the image peeling member, it is necessary to wait for the image forming material to cool down after each operation. Further, when the resin layer on the surface of the image peeling member is formed of the same resin as the image forming material, the adhesiveness between the resin layer and the base material of the image peeling member is poor, particularly after cooling, and the resin is applied to the image recording medium. The resin of the layer was sometimes transferred. In addition, the resin layer on the image peeling member easily fell off, and the image peeled body could not be used for a long period of time.

Japanese Patent Application Laid-Open No. Hei 5-232737 discloses a method in which a felt roller such as stainless steel wool is used as an image peeling member, and an image forming material on a paper coated with a release agent is softened by heating and then peeled off from the paper. An image peeling method for removing an image forming material from a sheet by friction with a member in contact with the member is disclosed. However, since friction is used, the image forming material is rubbed against the paper at the time of peeling, and the rubbed image forming material remains between the fibers and the like of the paper to produce a practical level of recycled paper. I can't get it.

Japanese Patent Application Laid-Open No. 6-219068 discloses a method in which an image forming material on a paper surface-treated with a heat-denaturable material having a releasing property is softened by heating, and a film-like aluminum foil or a commercially available vinyl is used as an image peeling member. Disclosed is a method in which an image forming material is peeled off from a sheet by pressing with a tape. However, since the strength of the aluminum foil is weak and the vinyl tape is stretched, these cannot be used repeatedly.

Japanese Patent Application Laid-Open No. Hei 6-289754 discloses that an image forming material is taken into the holes and concave portions of an image peeling member having a plurality of holes or irregularities on its surface, and the cleaning frequency and scattering of the image forming material on the image peeling member are reduced. Disclosed are methods of reducing. However, when the image peeling member is heated, the taken-in image forming material melts and comes out to the surface side, and it is difficult to clean holes and uneven portions. Further, when the image peeling member is a belt, if a hole is formed in the belt, the image forming material adheres to the driving or driven roll, so that the belt cannot operate smoothly.

Japanese Patent Application Laid-Open No. 7-44072 discloses a roll-shaped image peeling member provided with a polyester resin layer on a base material having a matte surface. However, since the thermoplastic polyester resin comes into contact with the image forming material in a state where heat and pressure are applied, the two are mixed, and the adhesive force with the substrate surface is weakened. There is a possibility that the image is transferred to the image recording medium in reverse. When the polyester resin is polycarbonate, the surface is so hard that the polycarbonate cannot follow the unevenness of the image when the image peeling member is brought into contact with the image recording medium, and the image edge portion clearly remains on the image recording medium. If the image edge portion remains on the image recording body, the image before peeling can be determined, so that confidential leakage cannot be prevented.

JP-A-7-104621, JP-A-7-17-1
In 10590 and JP-A-7-114198,
As an image peeling member, polyethylene terephthalate (P
ET), PET with TiO ₂ , foamed PET, or SiO
_Although PET containing ₂ is used, since the surface of these image peeling members is as hard as in JP-A-7-44072, it cannot follow an image having irregularities of about 20 μm such as a color image. Further, there is a possibility that cleaning failure of the image forming material on the image peeling member may be caused.

[0014]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is capable of easily reproducing an image recording medium in an office or at home, and maintaining an image peeling performance which is good for a long period of time. An object is to provide a peeling member.

[0015]

Means for Solving the Problems As a result of intensive studies on the image peeling member, the present inventors have achieved the above object by providing a specific adhesive layer between the heat-resistant base material and the image peeling layer. That is, they have completed the present invention.

That is, the present invention provides an image peeling member for peeling the image forming material from the image recording body while heating and pressing the image forming material on the image recording body, wherein the image peeling member is a heat-resistant base material; An adhesive layer, and an image release layer, wherein the adhesive layer contains a material constituting the heat resistant substrate and a heat-fusible resin, and the image release layer has an affinity for the image forming material. An image peeling member comprising a material.

In the following description, an electrophotographic method is taken as an example. Normally, a static charge is uniformly applied to the surface of an electrophotographic photosensitive member by charging, and then the surface is exposed based on image information obtained from a document. An electrostatic latent image is formed. next,
By supplying an image forming material (toner) from a developing device to the electrostatic latent image on the surface of the photoreceptor, the electrostatic latent image becomes a visible image, which is transferred to an image recording medium. The forming material is fixed on the image recording medium.

Therefore, when the image is formed of a heat-fusible material, the image recording material is melted by heating the image recording material again, and the adhesion between the image recording material and the image forming material is reduced. It is easily understood that if the image forming material is separated from the image recording body by some force in this state, the image forming material can be peeled off.

In a state where the image forming material is melted as described above, an image peeling layer formed of a substance having a high affinity for the image forming material is brought into contact with the image forming material on the image recording material, thereby forming an image. The material is transferred from the image recording body to the image peeling member, and the image recording material can be removed from the image recording body.

However, the adhesion between the image release layer and the substrate is not always good. Therefore, in the present invention, the adhesiveness between the substrate and the image release layer is maintained by using the adhesive layer containing the material constituting the heat-resistant substrate and the hot-melt resin, and the image is peeled during both heating and cooling. Prevents the image forming material transferred to the member from falling off, maintains the thickness and surface smoothness of the image release layer, and maintains the release performance for a long time without performing strong cleaning that damages the base material and the adhesive layer I do.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

The image peeling member of the present invention comprises a heat-resistant base material, an adhesive layer, and an image peeling layer. The shape, structure, size and the like of the substrate of the image peeling member of the present invention are not particularly limited, and can be appropriately selected according to the purpose. A belt-shaped member is preferable in terms of operating efficiency and occupied volume. Also, if the belt has a seam, the pressing force changes at that portion during fixing, which affects image peeling. Therefore, an endless belt is more preferable.

The material of the heat-resistant base material is not particularly limited as long as it is a material having excellent heat resistance, mechanical strength, and good thermal conductivity. For example, polyethylene terephthalate, polybutadiene phthalate, polyester, thermosetting Resin materials such as conductive polyimide, thermoplastic polyimide, polyamide, and polyamideimide. Since the heating temperature of the image peeling member is about 100 ° C. to 150 ° C., a polyimide resin is desirable from the viewpoint of heat resistance and strength (stretch). Further, it is preferable to lower the volume resistivity by dispersing a conductive powder or the like in the resin, and among them, a polyimide having a low volume resistivity in which carbon black is dispersed is preferable.

When the heat-resistant substrate is a belt, its thickness is 3
The range is preferably from 0 to 200 µm, more preferably from 40 to 150 µm, even more preferably from 50 to 130 µm. When the thickness of the substrate is less than 30 μm, the dimensional stability during heating and cooling is poor, and the strength is low. On the other hand, when the thickness of the substrate exceeds 200 μm, heat is hardly transmitted, which leads to a decrease in image peeling speed and a prolonged cycle time.

The adhesive layer provided on the heat-resistant substrate contains a material constituting the heat-resistant substrate and a hot-melt resin. Examples of the material used for the heat-resistant substrate include those described above.

Examples of the heat-fusible resin include styrene resins such as styrene and parachlorostyrene polymers and copolymers, vinyl resins such as methyl acrylate and methyl methacrylate polymers and copolymers, and ethylene and propylene polymers and copolymers. Olefin resin,
Epoxy resin, polyester resin, polyurethane resin,
Thermoplastic materials such as polyamide resin, polyether resin, polyacetal resin, polycarbonate resin, and cellulose resin are exemplified. The hot-melt resin used for the adhesive layer is preferably the same as the affinity material used for the image release layer described below.

The adhesive layer of the image peeling member of the present invention is formed by applying a coating solution (solution or dispersion) containing the above-mentioned materials on a heat-resistant substrate. As a method of forming a film on a substrate, a blade coating method, a wire bar coating method, a spray coating method, a dip coating method, a bead coating method, an air knife coating method, a curtain coating method, a roll coating method and the like are usually used. Method is adopted. Also,
When the heat-resistant base material is in the form of a belt, it is particularly effective to mount the belt on a drum-shaped core base material corresponding to the inner peripheral length of the belt and then immerse the base material in the coating liquid.

The thickness of the adhesive layer of the image peeling member of the present invention is as follows:
5 μm to 200 μm, depending on the material properties of the image release layer
And more preferably 50 μm to 150 μm. When the thickness of the adhesive layer is less than 5 μm, when the image release layer is several hundred μm, and the base material is a belt, and the image release member is operated in a cooled state, the adhesive layer and the image release layer Is insufficient, and the image peeling layer may fall off. On the other hand, if the thickness of the adhesive layer exceeds 200 μm, energy is consumed more than necessary and the cycle time becomes longer.

The adhesive layer may be dried by air, but can be dried quickly by using heat. As the heat drying method, a known method such as a method in which the coating liquid is applied on a heat-resistant substrate and put in an oven, a method in which the coating solution is passed through an oven, and the like are employed.

The material constituting the image peeling layer of the image peeling member of the present invention may be a liquid material or a solid material, but a solid material is preferred because it has no migration property and can be used stably. Further, a liquid material and a solid material can be used in combination.

The image peeling layer contains a material having affinity and compatibility with the image forming material. Normally, when the image forming material is a color toner and when the image forming material is a black toner,
The materials used for the image forming materials are different. Therefore, the material used for the image peeling layer is required to have an affinity suitable for peeling each image forming material.

The affinity and compatibility with the image forming material are determined, for example, by Solub derived from a partial structural unit of a chemical structural formula.
The affinity parameter (SP) value can be evaluated. The closer the SP value, that is, the more similar the chemical structural formula, the higher the affinity and the higher the compatibility.

Therefore, as the affinity material used for the image peeling layer, the SP value of the image forming material for which the SP value is used is used.
Those having a value of ± 1.0 can be suitably used. Specifically, the SP value is 8.0 to 12.0 (cal / c
m ³ ) ^1/2 affinity materials can be suitably used.

As the affinity material, a material exhibiting heat melting property is preferable as in the case of the image forming material, and the melting temperature is in the range of 20 ° C. lower than the melting point of the image forming material to 50 ° C. higher. The conductive material is preferred. Among the materials having such properties, the same resin as the resin used for the image forming material is preferable, and it is particularly preferable to use the image forming material itself. Specifically, those exemplified as the heat-fusible material used for the adhesive layer can be exemplified.

In order to cope with various image forming materials with one or several kinds of image peeling members, it is preferable to maintain the affinity with the image forming material over a wide temperature range. Agents (adhesives).
Examples of the pressure-sensitive adhesive include a rubber-based adhesive, an acrylic-based adhesive, a vinyl ether polymer-based adhesive, and a silicone adhesive. Among these pressure-sensitive adhesives, it has good heat resistance that can be used at a temperature at which the image forming material is heated and melted, and has good compatibility with a silicon compound as a release material described later, and peeling. Silicone pressure-sensitive adhesives are preferred because performance and release performance can be maintained over long periods of repeated use.

The image release layer may contain a release material in addition to the above affinity material. The release material is not particularly limited as long as it has a release property with respect to the image forming material and the image recording medium, and specifically, a fluorine compound, a wax,
And silicon compounds, and these can be used alone or as a mixture.

Among these, compatibility with the affinity material,
From the viewpoint of safety, silicon compounds are preferred.

Examples of the fluorine compound include a fluorine-based polymer and a fluorine oil.

Specific examples of the fluorine-based polymer include polymers and copolymers synthesized from fluorine-containing monomers such as vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, tetrafluoroethylene, pentafluoropropylene and hexafluoropropylene. Copolymers of a fluorine-containing monomer with ethylene, (perfluoro) alkyl vinyl ether or acrylic resin, and polymers having a perfluoroaliphatic ring structure such as a polymer obtained by cyclopolymerization of perfluoroalkenyl vinyl ether, etc. In addition, elastomers (rubbers) of these polymers can be used.

As the fluorinated oil, X-CF_Two(O
C_TwoF_Four)_p(OCH_Two)_qOCF _Two-X
-Fluoropolyether, specifically, X is OCN-C₆
H_Three(CH_Three) Isocyanate modification represented by NHCO-
, A carboxyl group-modified product represented by -COOH,-
CH_TwoOH, -CF_TwoCH_Two(OCH_TwoCH_Two)_nOH
Alcohol-modified product represented by, etc., represented by -COOR, etc.
Ester modified products.

As the wax, low molecular weight polyethylene wax, low molecular weight oxidized polyethylene wax, low molecular weight polypropylene wax, low molecular weight oxidized polypropylene wax, higher fatty acid wax, higher fatty acid ester wax, sasol wax, carnauba wax,
Beeswax, montan wax, paraffin wax, microcrystalline wax and the like.

Examples of the silicon compound include an organic silicon compound, silicone rubber, silicone resin, and silicone oil. Examples of the organic silicon compound include a silane compound,
There are fluorine-containing silane compounds and isocyanate silane compounds.

As the silane compound, Si (OCH_Three)
_Four, CH_ThreeSi (OCH_Three)_Three, HSi (OC
H_Three)_Three, (CH_Three)_TwoSi (OCH_Three)_Two, CH_ThreeS
iH (OCH _Three)_Two, C₆H_FiveSi (OCH_Three)_Three, S
i (OC_TwoH_Five)_Four, CH_ThreeSi (OC_TwoH_Five)_Three,
(CH_Three)_TwoSi (OC_TwoH_Five)_Two, H_TwoSi (OC_Two
H_Five)_Two, C₆H_FiveSi (OC_TwoH_Five)_Three, (CH_Three)
_TwoCHCH_TwoSi (OCH_Three)_Three, CH_Three(CH_Two)₁₁
Si (OC_TwoH_Five)_Three, CH_Three(CH_Two)_FifteenSi (OC
_TwoH_Five)_Three, CH_Three(CH_Two)₁₇Si (OC_TwoH_Five)_Three
Alkoxysilanes such as (CH_Three)_ThreeSiNHSi
(CH_Three)_ThreeSilazanes, such as ((CH_Three) SiNH)
_TwoCO, tert-C_FourH₉(CH_Three)_TwoSuch as SiCl
Special silylating agents, silane coupling agents and HSC₈
H₆Si (OCH_Three)_ThreeSilane compounds such as
Hydrolyzate and partial condensate thereof. Silaneka
As a coupling agent, vinyl tris (β-methoxy
Toxy) silane, vinyl triethoxy silane, vinyl
Vinylsilanes such as rimethoxysilane, γ-methacrylo
Acrylic silane such as xypropyltrimethoxysilane
, Β- (3,4-epoxycyclohexyl) ethyl
Limethoxysilane, γ-glycidoxypropylmethyldi
Epoxysilanes such as ethoxysilane, N-β-
Noethyl) -γ-aminopropylmethyldimethoxysila
, Γ-aminopropyltriethoxysilane, N-
Amines such as nyl-γ-aminopropyltrimethoxysilane
Examples include silanes.

Examples of the fluorine-containing silane compounds include
If CF_Three(CH_Two)_TwoSi (OCH_Three)_Three, C₆F₁₃
C_TwoH_FourSi (OCH_Three)_Three, C₇F_FifteenCONH (CH
_Two) _ThreeSi (OC_TwoH_Five)_Three, C₈F₁₇C_TwoH_FourSi
(OCH_Three)_Three, C₈F₁₇C_TwoH_FourSiCH_Three(OCH
_Three)_Two, C₈F₁₇C_TwoH_FourSi (ON = C (CH_Three)
(C_TwoH_Five))_Three, C₉F₁₉C_TwoH_FourSi (OCH_Three)
_Three, C₉F₁₉C_TwoH_FourSi (NCO)_Three, (NCO)_Three
SiC_TwoH_FourC₆F₁₂C_TwoH_FourSi (NCO)_Three, C₉
F₁₉C_TwoH_FourSi (C_TwoH_Five) (OCH_Three)_Two, (CH
_ThreeO)_ThreeSiC_TwoH _FourC₈F₁₆C_TwoH_FourSi (OC
H_Three)_Three, (CH_ThreeO)_Two(CH_Three) SiC₉F ₁₈C_Two
H_FourSi (CH_Three) (OCH_Three)_TwoFluorine-containing sila such as
Compounds, their hydrolysates and their partial condensates
And the like.

As the isocyanate silane compounds, (CH ₃ ) ₃ SiNCO and (CH ₃ ) ₂ Si (N
CO) ₂ , CH ₃ Si (NCO) ₃ , vinylsilyl triisocyanate, C ₆ H ₅ Si (NCO) ₃ , Si (N
_{CO) 4, C 2 H 5} OSi (NCO) 3, C 8 H 17 Si
(NCO) ₃ , C ₁₈ H ₃₇ Si (NCO) ₃ , (NCO)
₃ SiC ₂ H ₄ (NCO) _{3 and the} like can be exemplified.

Silicone rubbers can be broadly classified into millable type and liquid type. Millable type silicone rubber includes linear and highly polymerized dimethyl type, methyl vinyl type, methyl phenyl vinyl type and methyl fluoroalkyl type. In some cases, a polyorganosiloxane is used as a main raw material, a reinforcing filler and various additives are blended, and then a vulcanizing agent is added and cured by heating. Examples of the liquid silicone rubber include a condensation-type silicone rubber that cures at room temperature, an addition-type silicone rubber that is heated and cured using a platinum-based catalyst, and an ultraviolet-curable silicone rubber. There is also a silicone rubber obtained by converting the silane compound into an elastomer.

The silicone resin has 2, 3 or 4
It refers to a high-molecular-weight polysiloxane incorporating a large amount of functional units, and a silicone varnish as a solution thereof. Silicone varnish includes silicone alkyd varnish, silicone epoxy varnish, silicone polyester varnish,
A varnish modified by reacting them with an acrylic resin, a phenol resin, a polyurethane, a melamine resin, or the like can be given as an example.

Examples of the silicone oil include dimethylpolysiloxane and methylphenylpolysiloxane type silicone oil, methyl hydrogen silicone oil, and reactive silicone oil having a reactive group introduced into a molecule. As a reactive silicone oil,
Examples include silanol-modified, carboxy-modified, amino-modified, epoxy-modified, carbinol-modified, methacryl-modified, mercapto-modified, and phenol-modified, as well as silicone oils having these different reactive groups introduced. By using these silicone oils mixed with the silane compound, the releasability of the image peeling member is dramatically improved.

The amount of the releasable material contained in the image peeling portion layer depends on the kind of the releasable material and the kind of the affinity material used together with the releasable material, but is 5 to 80% by weight. Preferably, it is more preferably 25 to 70% by weight. When the content of the release material is less than 5%, the function of the affinity material is strong,
The image recording body may be wound around the image peeling member. On the other hand, when the content of the release material exceeds 80%, on the contrary, the release property becomes strong, so that the image forming material cannot be removed from the image recording medium.

These releasable materials may be used alone or in combination of two or more.

It is desirable that the heat-fusible material and the release material used in the image peeling layer are uniformly mixed, and therefore, a compatibilizer or a plasticizer can be blended in the image peeling layer.

The mixing ratio of the compatibilizer or plasticizer is not particularly limited as long as the surface properties of the image peeling member such as the affinity, compatibility, and releasability of the image peeling member and the image forming material are not changed. However, it is preferably 1% by weight to 30% by weight based on the total of the heat-fusible material and the release material.

The thickness of the image release layer is preferably in the range of 10 to 300 μm, more preferably in the range of 20 to 150 μm, and still more preferably in the range of 25 to 150 μm. If the thickness of the image peeling layer is less than 10 μm, it cannot follow the 20 to 30 μm irregularities on the surface of the image forming material on the image recording medium,
In some cases, the image forming material cannot be completely removed. If the thickness of the image peeling layer exceeds 300 μm, heat is difficult to be transmitted, and accordingly, the heater temperature must be increased or the peeling speed must be reduced. Further, when the paper is weak in stiffness or the like, when the paper is pressed against the image peeling member, especially the leading end of the paper is buried in the image peeling layer, and it becomes difficult to separate the paper from the image peeling member.

The image peeling layer of the image peeling member of the present invention is formed by applying a coating solution (solution or dispersion) containing the above-mentioned materials onto the adhesive layer. As a method of forming a film on the adhesive layer, a blade coating method, a wire bar coating method, a spray coating method, a dip coating method, a bead coating method, an air knife coating method, a curtain coating method,
A commonly used method such as a roll coating method is employed.

The image peeling layer may be dried by air, but can be dried quickly by using heat. As the heat drying method, a known method such as a method in which an adhesive layer coated with a coating liquid for an image release layer is put into an oven, a method in which the coating solution is passed through an oven, or the like is adopted.

The image forming material is accumulated on the image peeling layer as the image peeling is repeated. As described above, when the stacked image forming materials are thick, it becomes difficult to transfer heat, and it is difficult to separate the paper from the image peeling member.
Therefore, means for removing the image forming material is required. The normal cleaning method of rubbing the image peeling member with a blade, brush, steel wool, or the like causes unevenness in film thickness or fine irregularities on the surface of the image peeling member, and the unevenness deteriorates the image peeling performance. In the present invention, focusing on the heat-fusible material contained in the image forming material, the heating member is brought into contact with the image peeling layer of the image peeling member, the image forming material on the surface is melted, and the image is formed from the image peeling layer. The material is dropped into the collection box. Thereby, the surface of the image peeling layer becomes smooth, and the thickness of the image peeling layer is controlled to a desired value. Originally, the surface of the image peeling member has reached the softening temperature of the heat-fusible material at the time of image peeling, and the heating energy required for further melting the heat-fusible material does not become extremely large.

Examples of the heating member include a metal or ceramic blade provided with a ceramic heater, a heating installation member having an appropriate gap, and a roller heater.

The image recording material to which the image peeling member of the present invention can be applied includes known images such as plain paper, coated paper, plastic films such as OHP films, metals, and ceramic base materials having a recording layer formed on a base material. Recording media can be used.

The base material of the image recording body includes paper, metal (such as aluminum), plastic, and ceramic (such as alumina). The shape is not particularly limited, but is preferably a film.

Using paper as a base material of an image recording medium,
The raw material pulp is, for example, wood such as hardwood bleached kraft pulp, hardwood bleached kraft pulp, hardwood bleached sulphite pulp, softwood bleached kraft pulp, softwood unbleached kraft pulp, softwood bleached sulphite pulp, soda pulp, etc. And other fiber materials chemically treated,
Virgin bleached chemical pulp obtained through the bleaching step may be mentioned, and those having high whiteness are preferable. Further, as the used paper pulp, for example, used paper pulp, high quality paper, high quality coated paper, medium paper, which has been dissociated from unprinted waste paper such as top white, special white, medium white, and white loss generated in bookbinding, printing plants, cutting shops, etc. Quality paper,
Flat paper, concave plate, convex plate printing, medium-quality coated paper, printed paper, electrophotographic method, heat-sensitive method, thermal transfer method, pressure-sensitive recording method, ink-jet recording method, used paper printed with carbon paper, etc.,
Water-based, waste paper written with an oil-based ink or pencil, waste paper pulp, etc., after dissociating waste paper, deinked by an optimal method for each waste paper, etc., among them, waste paper pulp having a high whiteness and a small amount of mixed matter is preferable. .

As the image recording medium, it is preferable to use an image recording medium in which the material constituting the surface has releasability from the image forming material. For example, a release material having a good release property with respect to the image forming material is applied or impregnated on the pulp fiber surface of the image recording paper made with the above pulp or the coated material surface of the coated paper, and is released on the substrate surface. It is preferable to give the moldability.

Examples of the releasable material include a fluorine compound such as a fluorine oil, a silicon compound, and a wax. The releasability from the image forming material and the transfer from the substrate surface to the members in the apparatus are included. In view of the paper running property and the like, a material that reacts with the pulp fiber and directly bonds to the pulp fiber is preferable, and a silicon compound is preferable as such a releasable material.

As the silicon compound, those described above can be used. These silicon compounds can be used alone or as a mixture. Further, silica gel or the like may be used as the silicon compound. Among these, a fluorine-containing silicon compound, an isocyanate silane compound, a modified silicone oil having a reactive group in a molecule, and a mixture thereof are preferable, and these are applied to a base material of an image recording medium, or Is impregnated with a solution containing these silicon compounds and dried to form a coating having releasability.

When paper is used as the base material of the image recording medium, fine particles are further added to the image recording medium to improve the fixing property with the image forming material, and the surface of the image recording medium is adjusted to an appropriate amount. It is preferable to provide irregularities. Thereby, the image forming material can be fixed to the base fiber or only by wrapping and fixing the fiber, and a sufficient fixing force can be obtained between the two, so that the amount of resin used in the image forming material can be reduced. .

Examples of the fine particles include talc, clay (kaolin), calcium carbonate, titanium oxide, aluminum oxide, aluminum sulfate, zirconium oxide, barium titanate, silica, silicone resin, acrylic resin, styrene resin, and styrene-acryl resin. And melamine resin, benzoguanamine-formaldehyde resin, and melamine-benzoguanamine-formaldehyde resin. When a fluorine-containing silicon compound, isocyanate silane compound, modified silicone oil, or the like having high reactivity with these fine particles is used as the release material, these release materials are cured together with the pulp fiber, and the fine particles are removed from the base material. It also plays the role of fixing to.

An aluminum compound, a titanium compound, and a zirconium compound can be added to the coating composition for coating the release material on the image recording medium base in an amount that does not impair the release effect.

In the present invention, light-transmitting plastic films usable as a substrate for OHP films include acetate films, cellulose triacetate films, nylon films, polyester films, polycarbonate films, polystyrene films, polyphenylene sulfides. There are films, polypropylene films, polyimide films, cellophane, etc.Currently, mechanical, electrical, physical, chemical properties, workability, polyester film,
In particular, biaxially stretched polyethylene terephthalate films are often used.

It is preferable that the surface of the plastic film has releasability as in the case of the paper substrate.
As the release material for that purpose, it is preferable to use the above-mentioned release material, but it is not limited to these.

As a method for forming a film of a release material or the like on a substrate of an image recording medium, a blade coating method, a wire bar coating method, a spray coating method,
A commonly used method such as a dip coating method, a bead coating method, an air knife coating method, a curtain coating method, and a roll coating method is employed.

The coating may be dried by air.
Drying using heat further increases the releasability of the image forming material. It is said that the reason for this is that components reacting with the base material are arranged or oriented, but it is not clear. As the heat drying method, a known method such as a method in which a substrate provided with a coating is placed in an oven, a method in which the substrate is passed through an oven, or a method in which the substrate is brought into contact with a heating roller is employed.

The image peeling method using the image peeling member of the present invention includes a peeling step of peeling the image forming material from the image recording body by bringing the image forming material on the image recording body into contact with the image peeling member by heating. Removing the image forming material transferred from the body to the image peeling member from the image peeling member.
In the removing step, the thickness of the image peeling layer is controlled by bringing a heating member into contact with the surface of the image peeling member.

This method may further comprise, before contact between the image forming material on the image recording material and the image peeling member, an adhesion reducing step for reducing the adhesion between the image recording material and the image forming material. In the lowering step, it is preferable to melt the image forming material on the image recording medium. For this purpose, the image forming material can be heated or the image forming material can be irradiated with infrared rays or the like. Further, the image recording medium holding the image forming material may be immersed in a solution containing a surfactant or the like. From the viewpoint of maintaining the peeling performance of the image peeling member, it is preferable that the surfactant is not accumulated on the image peeling member, and it is preferable to use a method of reducing the adhesive force by heating or infrared irradiation.

The heating of the image forming material can be carried out in the peeling step.

FIG. 1 shows a partial configuration of an image peeling belt 1 which is an image peeling member according to an embodiment of the present invention. The image peeling belt 1 includes a heat resistant substrate 2, an adhesive layer 3 formed on the upper surface of the heat resistant substrate 2, and an image peeling layer 4 formed on the adhesive layer 3.

FIG. 2 shows a schematic configuration of an image peeling device 30 using the image peeling belt 1 of FIG. The image peeling device 30 includes a tray 8, and the image recording body 7 on which the image forming material 6 is fixed is housed in the tray 8 such that the surface on which the image forming material 6 is fixed faces down. A take-out roll 9 for taking out the image recording medium 7 from the tray 8 is disposed near the tray 8. A pair of transport rolls 10 is arranged on the side of the take-out roll 9 opposite to the tray 8, and a supporting drive roll 11 is arranged on the side of the pair of transport rolls 10 opposite to the take-out roll 9. A support member 13 having a desired curvature is disposed on the opposite side of the support drive roll 11 from the pair of transport rolls 10, and the support roll 1 is provided below the support member 13 on the support drive roll 11 side.
2 are provided. The image peeling belt 1 is wound around a supporting drive roll 11, a supporting member 13, and a supporting roll 12 such that the image peeling layer 4 is disposed outside. The support drive roll 11 and the support roll 12 have a SUS or aluminum base material, and may have a heat-resistant silicone rubber elastic layer on the surface. The support drive roll 11 and the support roll 12 each include heaters 14 and 15, respectively, so that the temperature of the image peeling layer of the image peeling belt 1 becomes equal to or higher than the softening point and lower than the melting point of the heat-fusible material contained in the image forming material 6. It is adjusted to become. Support drive roll 1
A pressure roll 16 is disposed directly above the roll 1, and an image recording body 7 on which the image forming material 6 is fixed passes through a nip formed between these rolls, thereby recording an image on the image peeling belt 1. The body 7 is pressed. Pressure roll 16
The base material is SUS or aluminum, and a heat-resistant silicone rubber layer is provided on the base material and a release layer is further provided on the surface thereof. Specific examples of the release layer include fluororubber with high release properties and fluororesins such as PFA and PTFE.

A guide 23 is arranged on the side of the support member 13 opposite to the support drive roll 11, and an accumulation tray (not shown) is arranged on the side of the guide 23 opposite to the support member 13.

Further, the blade 17 having the ceramic heater 19 below the support roll 12 is attached to the image peeling belt 1.
It is arranged so that it may contact. A collection box 18 for collecting the image forming material 6 removed from the image peeling belt 1 by the blade 17 is disposed below the blade 17. Further, sensors 21, 22, and 20 for measuring the respective surface temperatures are attached to the supporting drive roll 11, the supporting roll 12, and the ceramic heater 19.

In the image forming apparatus 30 described above, the image recording material 7 on which the image forming material 6 is fixed is taken out from the tray 8 by the take-out roll 9, and is moved between the pressure roll 16 and the supporting drive roll 11 by the pair of transport belts 10. The image recording body 7 is pressed against the image peeling belt 1 by passing through the nip portion. The image peeling belt 1 is previously heated by the support driving rolls 11 and the support rolls 12 containing the heaters 14 and 15, and the image recording body 7 is heated by the image peeling belt 1;
Conveyed.

At the support member 13, the image recording body 7 does not follow the curvature of the support member 13 due to its stiffness or the like, and the leading end of the image recording body 7 is separated from the image peeling belt 1. At this time, the image forming material 6 on the image recording material 7 is softened, and the image peeling layer 4 of the image peeling belt 1 containing a material having an affinity for the image forming material 6 from the image recording material 7.
Move to Next, the image recording body 7 from which the image forming material 6 has been removed is guided by the guide 23, and is accumulated in a tray (not shown). On the other hand, the image forming material 6 transferred to the image peeling belt 1 moves downward with the movement of the image peeling belt 1 and is rubbed off from the image peeling belt 1 by a blade 17 preheated by a ceramic heater 19 and melted. , And the blade 17 is collected in the collection box 18.

[0080]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the invention is limited thereto. In the examples and comparative examples, "parts" means "parts by weight". (Example 1) Synthesis of hot-melt resin (1) 400 parts of polyoxyethylene (2,2) -2,2-bis (4-hydroxyphenyl) propane and polyoxypropylene (2,2) -2, 350 parts of 2-bis (4-hydroxyphenyl) propane and 380 parts of terephthalic acid are placed in a glass two-liter four-necked flask equipped with a stirrer, a condenser, a nitrogen gas inlet tube, and a thermometer. It was set on the mantle heater. After replacing the inside of the reaction vessel with nitrogen gas, 1.0 part of dibutyltin oxide was added into the reaction vessel, and heated with a mantle heater.
The mixture was reacted at about 150 ° C. and normal pressure for 6 hours under a nitrogen stream while stirring, and then reacted at 220 ° C. under reduced pressure for 3 hours. The degree of polymerization was monitored by a softening point according to ASTM E28-51T. When the softening point reached 120 ° C,
Terminate the reaction, then cool the reaction product to room temperature,
A pale yellow hot-melt resin (1) was obtained. The glass transition temperature Tg of the obtained hot-melt resin (1) was 57 ° C.

Preparation of Coating Solution for Adhesive Layer 100 parts of polyamic acid (Trainis # 3000, manufactured by Toray Co., Ltd.), which is a precursor of polyimide, and 100 parts of the heat-meltable resin (1) are put in 800 parts of toluene. And stirred to prepare a coating solution for the adhesive layer.

Preparation of Coating Solution for Image Peeling Layer 200 parts of the obtained hot-melt resin (1) was mixed with 30 parts of ethyl acetate.
In 0 part, the mixture was stirred and dissolved to prepare a coating liquid for an image release layer.

Production of Image Peeling Belt A belt having the above-mentioned polyimide belt mounted around a drum-shaped core substrate corresponding to the inner peripheral length of an endless polyimide belt having a thickness of 75 μm and a diameter of 68 mmφ was placed in the adhesive layer coating liquid. Dipped. The coating film is heated and dried at 130 ° C. for 60 minutes,
An adhesive layer having a thickness of 40 μm was provided on the polyimide surface.

Next, the polyimide belt coated with the adhesive layer was immersed in the coating solution for the image peeling layer while being mounted around the core substrate. The coating film was heated at 115 ° C. for 15 minutes and dried to form an image release layer having a thickness of 50 μm, thereby obtaining an image release belt.

Evaluation of Image Peeling Belt The obtained image peeling belt was mounted on the image peeling device shown in FIG. 2, and the thickness of the image peeling layer of the image peeling belt was always 50 μm.
m, the position of the blade was adjusted. The image peeling device was driven without heating the image peeling belt,
The image release layer did not fall off or peel off from the substrate.

On the other hand, the thickness of the image recording medium is 100 μm.
Is immersed in a coating liquid obtained by diluting a photo-curable silicone resin (trade name: UVHC1105, manufactured by Toshiba Silicone Co., Ltd.) with ethyl acetate, and irradiating the obtained coating film with light to obtain a PET film. An image recording body having a 2 μm image receiving layer formed thereon was obtained. A color copier Acolor 930 (manufactured by Fuji Xerox Co., Ltd.) is placed on this image recording medium.
Was used to fix black and white and color images including characters and solid images.

The surface temperature of the image peeling layer of the image peeling belt is adjusted to be maintained at around 110 ° C. by the heater in the supporting drive roll of the image peeling device, and the surface temperature of the blade is adjusted to 120 ° C. Then, the process speed was set to 60 mm / sec. When the image recording body on which the image was fixed was inserted into the image peeling device, the image forming material was completely removed from the image recording body. Using this image recording medium and the image peeling device, printing and toner peeling were repeated 50 times, but the image recording body could be reproduced without deterioration of the image peeling property. (Comparative Example 1) The image peeling belt without the adhesive layer of Example 1 was attached to the image peeling device used in Example 1, but the operation until the surface temperature of the image peeling belt was set to a predetermined temperature was performed. During the process, the image peeling layer dropped off from the polyimide and could not be evaluated. (Example 2) Addition reaction type silicone pressure sensitive adhesive (trade name: T
50 parts of SR1515A, manufactured by Toshiba Silicone Co., Ltd.) and 0.5 part of a crosslinking agent (trade name: TSR1515B, manufactured by Toshiba Silicone Co., Ltd.) are stirred in 100 parts of toluene,
Further, a thermoplastic silicone resin (trade name: XR39-B1676, manufactured by Toshiba Silicone Co., Ltd.) 50 as a release material 50
Was added and dissolved to obtain a coating liquid for an image release layer.

The coating liquid was changed to the one described above, and the coated film of the image release layer was dried at 120 ° C. for 20 minutes to have a thickness of 280 μm.
An image peeling belt was obtained in the same manner as in Example 1 except that the image peeling layer was obtained. This was attached to the image peeling device shown in FIG. 2 similarly to Example 1, and the position of the blade was adjusted so that the thickness of the image peeling layer of the image peeling member was always 300 μm.

As in Example 1, the image peeling apparatus was driven without heating the image peeling belt, but the image peeling layer did not fall off or peel off from the polyimide.
Further, when printing and image peeling were repeated 50 times in the same manner as in Example 1, the image recording medium could be reproduced without lowering the image peeling property. (Example 3) Preparation of Coating Solution for Adhesive Layer 150 parts of polyamic acid (trade name: Trenice # 3000, manufactured by Toray Industries, Ltd.) and 150 parts of styrene-acrylic resin (trade name: PSB2733, manufactured by Sanyo Chemical Co., Ltd.) were dissolved in toluene. The mixture was stirred in 700 parts to prepare a coating liquid for an adhesive layer.

Preparation of Coating Solution for Image Release Layer In addition, a styrene-acrylic resin (trade name: PSB273)
3, 100 parts of Sanyo Kasei Co., Ltd.) was placed in 400 parts of toluene and dissolved by stirring to prepare a coating liquid for an image release layer.

The same procedure as in Example 1 was repeated, except that the coating liquid for the adhesive layer was changed to the above, and the obtained coating film was dried by heating at 130 ° C. for 50 minutes. Was provided.

The coating liquid for the image release layer was changed to the above one,
An image release layer having a thickness of 50 μm was formed in the same manner as in Example 1 except that the obtained coating film was heated and dried at 115 ° C. for 10 minutes to obtain an image release belt.

The image peeling device was driven without heating the image peeling belt in the same manner as in Example 1. However, the image peeling layer did not fall off or peeled off the polyimide. Further, the image recording medium used in Example 1 was added to Viva manufactured by Fuji Xerox.
Printing an image with ce450 and peeling the image at 130 ° C. was repeated 50 times, but the image recording medium could be reproduced. (Example 4) Styrene-acrylic resin (trade name: PSB)
2733, manufactured by Sanyo Kasei Co., Ltd.), and 40 parts of paraffin wax (trade name: HNP-0190; manufactured by Nippon Seiwa Co., Ltd.) as a mold releasing material were added to 100 parts of toluene, stirred, dispersed, and dispersed. A coating solution was prepared. Using this coating solution for an image release layer, the obtained coating film was cured at 120 ° C. for 20 minutes.
An image-peeling belt was obtained in the same manner as in Example 3 except that drying was performed for a minute. The image release layer of the image release belt has a thickness of 80 μm.
m. This was mounted on the image peeling device shown in FIG. 2 as in Example 1, and the position of the blade was adjusted so that the thickness of the image peeling layer of the image peeling member was always 80 μm.

As in Example 1, the image peeling device was driven without heating the image peeling belt. However, the image peeling layer did not fall off or peeled off the polyimide. Further, the image recording medium used in Example 1 was added to Viva manufactured by Fuji Xerox.
Printing the image with ce450 and peeling the image at 130 ° C. was repeated 50 times, but the image recording medium could be reproduced without lowering the image peeling property. (Example 5) Acolo color copying machine manufactured by Fuji Xerox
200 parts of the polyester binder resin used in the r930 toner was stirred and dissolved in 600 parts of methylene chloride to obtain a coating liquid for an image release layer.

Using this coating solution, the coating film was heated at 120 ° C. for 1 hour.
An image peeling belt was obtained in the same manner as in Example 3, except that the image peeling layer having a thickness of 125 μm was obtained by drying for 0 minutes. This was attached to the image peeling device shown in FIG.
The position of the blade was adjusted so that the thickness of the image peeling layer of the image peeling member was always 110 μm.

The image peeling device was driven without heating the image peeling belt in the same manner as in Example 1. However, the image peeling layer did not fall off or peeled off the polyimide. Further, printing and image peeling were repeated in the same manner as in Example 1, but the image recording medium could be reproduced without lowering the image peeling property. (Example 6) 100 parts of an amorphous linear polyester resin (trade name: Byron BX-1001, manufactured by Toyobo Co., Ltd.) is stirred in 400 parts of methyl ethyl ketone, and the mixture contains a siloxane-modified polyimide resin, a curing agent, and a solvent. 100 parts of a solution (Shin-Etsu Polyimide Silicone: X-22-8917, Shin-Etsu Chemical Co., Ltd. prototype) was added and stirred to prepare a coating solution for an adhesive layer.

An image peeling belt was obtained in the same manner as in Example 1 except that the coating solution for the adhesive layer was changed to the above. In addition,
The thickness of the image peeling layer is 50 μm, and the thickness of the adhesive layer is 4 μm.
It was 0 μm.

This was mounted on the image peeling apparatus shown in FIG. 2, the surface temperature of the image peeling belt was maintained at 150 ° C., the process speed was maintained at 15 mm / sec, and the color toner for Acolor 930 was sprinkled on the image peeling member, and the surface was peeled off with a blade. While flattening, a toner layer having a thickness of 100 μm was obtained on the image peeling member.

After cooling the image peeling member, the same as in Example 1,
When the image peeling belt was driven without heating, the image peeling layer did not fall off or peel off from the polyimide. As in Example 1, printing and image peeling were repeated, but the image recording body could be reproduced without lowering the image peeling property. (Example 7) 100 parts of the hot-melt resin (1) was put into 200 parts of ethyl acetate and stirred to dissolve. Also, ethyl acetate 8
Amino-modified silicone oil (brand name: KF86)
7, Shin-Etsu Chemical Co., Ltd.), 5 parts of methyltriisocyanatesilane were further stirred to obtain a release agent solution.
These two solutions were stirred to prepare a coating liquid for an image release layer.

Using this coating liquid for an image release layer, the obtained coating film was dried at 100 ° C. for 10 minutes to obtain an image release layer having a thickness of 100 μm, in the same manner as in Example 6, except that the image was removed. A peel belt was obtained.

This was mounted on the image peeling device shown in FIG. 2 in the same manner as in Example 1, and the position of the blade was adjusted so that the thickness of the image peeling layer was always 100 μm.

As in Example 1, the image peeling belt was driven without heating, but the image peeling layer did not fall off or peel off from the polyimide. Further, printing and image peeling were repeated in the same manner as in Example 1, but the image recording body could be reproduced without lowering the image peeling property.

[0103]

According to the present invention, since a specific adhesive layer is provided between the heat-resistant base material and the image peeling layer, the image recording medium can be easily reproduced in an office or at home, and good image peeling performance can be obtained over a long period of time. An image peeling member that can be maintained can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view illustrating a configuration of an image peeling member of the present invention.

FIG. 2 is a diagram showing a schematic configuration of an image peeling device using the image peeling member of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image peeling belt 2 Heat resistant base material 3 Adhesive layer 4 Image peeling layer

Claims (10)

[Claims] 1. An image peeling member for peeling off an image forming material from an image recording body while heating and pressing the image forming material on the image recording body, wherein the image peeling member comprises a heat-resistant base material, an adhesive layer, and An image release layer, wherein the adhesive layer contains a material constituting the heat resistant substrate and a heat-fusible resin, and the image release layer contains a material having an affinity for the image forming material. An image peeling member characterized by the above-mentioned. 2. The image peeling member according to claim 1, wherein the heat-fusible material is a material having the affinity. 3. The image peeling member according to claim 1, wherein the heat-resistant substrate has a belt shape. 4. The image peeling member according to claim 3, wherein the heat-resistant substrate is an endless belt made of a polyimide resin. 5. The image peeling member according to claim 1, wherein the material having affinity is at least one of a pressure-sensitive adhesive and a heat-fusible material. 6. The image peeling member according to claim 1, wherein the image peeling layer further contains a release material. 7. The image peeling member according to claim 6, wherein said release material is at least one selected from an organic silicon compound, a silicone resin, a silicone oil and a wax. 8. The image peeling member according to claim 6, wherein the amount of the release material contained in the image peeling layer is 5 to 80% by weight. 9. The image peeling member according to claim 1, wherein the material having affinity is the image forming material. 10. The image peeling layer has a thickness of 10 to 300.
The image peeling member according to any one of claims 1 to 9, wherein the thickness is μm.