JP4165765B1 - Elastic member, toner fixing member, fixing device, and method of manufacturing elastic member - Google Patents

Abstract

An elastic member having elasticity and capable of being thinned, and a method for manufacturing the same are provided. A toner fixing unit including the elastic member, a fixing device using the toner fixing unit, and an elastic member are provided. Providing chemical / medical parts using chemical / medical parts and chemical / medical parts.
An elastic member in which a surface layer 2 is provided on a base material 1, the base material 1 is made of a porous material, and the surface layer 2 has a fluorinated polyether skeleton in pores on the surface of the base material 1. Is filled with rubber that is silicone-crosslinked. The elastic member is manufactured by filling the pores of the base material 1 from the surface side with a rubber whose liquid fluorinated polyether skeleton is not silicone-crosslinked, and then crosslinking the rubber to form the surface layer 2.
[Selection] Figure 4

Description

The present invention relates to an elastic member, a toner fixing unit, a fixing device, and a method for manufacturing the elastic member.

  Elastic members are used in various parts and devices, and are widely used in, for example, electrophotographic copying machines, laser beam printers, chemical experimental devices, drip devices, catheter devices, and the like.

In particular, when an elastic member is used as a toner fixing unit in a fixing device such as an electrophotographic copying machine or a laser beam printer, the surface made of PTFE porous structure in the surface member to which toner adheres forms a hole. There was a problem that the toner was buried and adhered in the portion. Therefore, the surface of the fixing belt or fixing roll as a conventional toner fixing unit is a nonporous and solid material such as polytetrafluoroethylene (PTFE) or tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA). Was formed. Further, in the toner fixing unit, an elastic layer made of an elastomer or the like is formed under the surface release layer in order to fix the toner with a clear image quality.
In addition, the use of a fluororesin tube can improve the releasability of the toner and suppress the pressing unevenness of the toner on the paper, so that the image quality of the printed image can be improved and the fixing roll has excellent durability. A fixing device having a fixing belt has been proposed (for example, Patent Document 1).

  In addition, recent demands for reducing power consumption of copiers and printers have become enormous, and in order to reduce power consumption, methods that keep the preheating temperature during standby low or do not perform preheating are used. For example, a quick start up to a usable state in a short time is required, and it is necessary to reduce the heat capacity of the toner fixing unit.

  Since toner is fused by using electric power as a heat source, the layer thickness of the elastic layer and the release layer becomes a heat transfer resistance, so that this layer is required to be thinned. Thermal energy required for temperature can be reduced.

For example, the release layer is a fluororesin film, the elastic layer is filled with an elastic body in the pores of the porous fluororesin film, and the release layer is the outermost surface layer and is in contact with the elastic layer. However, the thing which is going to solve these subjects by being excellent in mold release property is proposed (for example, patent documents 2).
JP 2005-24931 A JP 2005-257762 A

  As described above, the PTFE porous material has been used as a silicon oil supply member for preventing the toner from adhering to the fixing member. However, since the toner adheres to the pores of the PTFE porous material, It is not used as a toner fixing unit that is in direct contact with the toner.

  In the case where the release layer, the elastic layer, and the base layer are constituent layers, in order to obtain a three-layer structure, a fluorine-type porous film is wrapped on the base layer and further heat-sealed, or an adhesive is used. The nonporous fluororesin film must be wrapped through. As described above, the number of processing steps for forming the fluororesin layer, the complexity of processing for preventing the occurrence of a step when forming a cylindrical shape by lapping, the adhesion of the fluororesin that constitutes the release layer and the elastic layer, and It has many problems such as poor reliability.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide an elastic member that has elasticity and can be thinned, and a method for manufacturing the same, and a toner fixing unit including the elastic member. Another object of the present invention is to provide a fixing device using a toner fixing unit.

  In order to solve the above-described problems and achieve the object, the present invention is configured as follows.

The invention according to claim 1 is an elastic member in which a surface layer is provided on a base material,
The base material is a porous fluororesin,
The surface layer is formed by filling rubber in which the fluorinated polyether skeleton is silicone-crosslinked from the surface side only in the pores on the surface of the base material ,
The surface layer is an elastic member in which an outer surface is polished to adjust a layer thickness .

The invention according to claim 2, wherein the porous fluororesin, an elastic member according to claim 1, characterized in that the porous polytetrafluoroethylene.

According to a third aspect of the present invention, there is provided a toner fixing portion having the elastic member according to the first or second aspect.

According to a fourth aspect of the present invention, there is provided a fixing device comprising the toner fixing unit according to the third aspect.

Invention of Claim 5 is a method of manufacturing the elastic member of Claim 1 or Claim 2 ,
From the surface side only in the pores of the surface of the base material, filled with a rubber in which the liquid fluorinated polyether skeleton is not silicone-crosslinked,
Then the rubber is crosslinked to form the surface layer ,
The surface layer is a method for producing an elastic member, wherein an outer surface is polished to adjust a layer thickness .

  With the above configuration, the present invention has the following effects.

In the invention described in claim 1, the base material is a porous fluorocarbon resin, rubber fluorinated polyether skeleton from the surface only in the pores of the surface of the base material is a silicone cross-linking is filled surface layer and obtain the elastic in structure is formed, which was obtained elasticity by modifying the surface, can be more thinned, moreover filling of rubber distribution by performing a surface of the base Is formed to be inclined from the surface to the opposite side. In addition, the surface layer can polish the outer surface, thereby adjusting the thickness of the surface layer to obtain a predetermined elasticity and improving the flatness.

In the invention according to claim 2 , the porous fluororesin is porous polytetrafluoroethylene (PTFE), which can be made thinner, and the rubber is filled from the surface of the base material so that the distribution is surface. It is formed in an inclined manner on the opposite side from the center, or is formed substantially uniformly throughout.

In the third aspect of the invention, the toner fixing unit having an elastic member can achieve high reduction in power consumption and high image quality while suppressing elasticity and highly suppressing peeling.

In the invention according to the fourth aspect , the fixing device having the toner fixing unit can achieve high reduction in power consumption and high image quality while highly suppressing peeling.

In the invention described in claim 5, the pores only on the surface side of the surface of the base material, a rubber liquid fluorinated polyether skeleton is not silicone crosslinked filled, the surface layer was then crosslinked rubber Elasticity has been obtained, and elasticity has been obtained by modifying the surface, making it possible to make the film thinner, and by filling the rubber from the surface of the base material, the distribution is inclined from the surface to the opposite side. It is formed. Further, the surface layer can polish the outer surface, thereby adjusting the thickness of the surface layer to obtain a predetermined elasticity and improving the flatness.

The elastic member of the present invention is an elastic member in which a surface layer is provided on a base material, the base material is made of a porous material, and the surface layer has a fluorinated polyether skeleton in the pores of the surface of the base material. It is filled with crosslinked rubber. Hereinafter, the present invention will be described in detail.
(Base material)
The base material according to the elastic member of the present invention is porous, and porous fluororesin, pulp, silica gel, celite, felt, urethane foam, sponge and the like are used as the porous base material. The pores on the surface of the base material are filled with rubber in which a liquid fluorinated polyether skeleton is crosslinked with silicone.

  Examples of the fluororesin constituting the porous fluororesin include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), tetrafluoroethylene-hexafluoropropylene copolymer (FEP), ethylene -Tetrafluoroethylene copolymer (ETFE) etc. are mentioned, PTFE is suitable at points, such as heat resistance and a softness | flexibility, for example.

  When the porous fluorine tree contains carbon particles, metal powder, or the like, conductivity can be imparted and thermal conductivity can be improved.

  Examples of the porous fluororesin include stretched porous PTFE, and the stretched porous PTFE is a uniaxial direction in a direction perpendicular to the longitudinal direction at the time of producing the stretched porous PTFE film or the longitudinal direction at the time of producing the stretched porous PTFE film. Uniaxially stretched porous PTFE can be obtained by stretching only in a biaxial direction if stretched in the biaxial direction perpendicular to the longitudinal direction during the production of stretched porous PTFE film and the longitudinal direction during the production of stretched porous PTFE film. Porous PTFE is obtained.

  The uniaxially stretched porous PTFE has a fibrous structure in which the space of the folded crystal is vacant, and the biaxially stretched porous PTFE has a cobweb-like fibrous structure in which many spaces of the folded crystal exist. Yes.

  The porosity of the porous fluororesin is desirably 50% to 90%. If the porosity is too small, the space in which the fluorinated polyether skeleton can be filled with silicone-crosslinked rubber is reduced. The rubber may not be sufficiently filled, and if the porosity is too large, the strength may be insufficient. The maximum pore diameter of the porous fluororesin may be appropriately set in view of characteristics such as ease of filling with rubber having a fluorinated polyether skeleton crosslinked with silicone, and is preferably 0.01 μm to 20 μm, for example. . If the maximum pore diameter is too small, it is difficult to fill the rubber, and if the maximum pore diameter is too large, the strength may be insufficient.

  The suitable thickness of the expanded porous PTFE varies depending on the porosity of the expanded porous PTFE and the like, but is preferably 10 μm or more, for example. In addition, the thickness of each layer is an average thickness measured with a dial gauge.

  The form of the porous fluororesin used for the base layer is not particularly limited as long as it is a convenient form when producing the elastic member, and examples thereof include a belt shape, a roll shape, a tube shape, and a sheet shape.

The thickness of the porous fluororesin used for the base layer is desirably, for example, 10 μm or more. If the thickness is too thin, the strength may be reduced.
(Surface layer)
In the surface layer according to the elastic member of the present invention, the fluorinated polyether skeleton is silicone-crosslinked in the pores of the surface of the base material such as porous fluororesin, pulp, silica gel, celite, felt, urethane foam, and sponge. It is filled with rubber. Examples of the rubber in which the fluorinated polyether skeleton is silicone-crosslinked include trade name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd.

  Rubber in which the liquid fluorinated polyether skeleton is not silicone-crosslinked is liquid in an uncrosslinked state, and becomes a solid rubber by a crosslinking reaction. When it is liquid, it is infiltrated into the pores of the porous fluororesin, and then subjected to a crosslinking reaction to obtain a rubber.

  The viscosity of the liquid rubber (uncrosslinked) is not particularly limited as long as it can be impregnated into the pores of the base material. However, when a porous fluororesin is used as the base material, for example, the pores of the porous fluororesin In view of the ease of entry into the glass, it is desirable that it is 1000 poise or less at 25 ° C. If the viscosity is too large, it becomes difficult to penetrate the porous fluororesin into the pores. For example, the viscosity is reduced by 20 to 30% by dilution.

  The rubber may contain, for example, carbon particles, metal fine particles, and other inorganic powders in a range that does not impair the characteristics required for the surface layer, thereby improving strength, imparting conductivity, heat Conductivity can be controlled.

  The hardness of the surface layer can be adjusted by the hardness of the rubber. For example, the hardness of the rubber is preferably 80 or less in durometer A hardness. If the hardness of the rubber is too large, the effect of providing the surface layer is sufficient. May not be secured. In addition, the rubber related to the surface layer desirably has a tensile strength of 0.1 MPa or more. If the tensile strength of the rubber is too small, the strength of the surface layer becomes weak, so the durability of the elastic member is insufficient. It may become.

The outer surface of the surface layer may be polished by a polishing machine or the like, and by polishing, the thickness of the surface layer can be adjusted and the planarity can be improved. The thickness of the surface layer is preferably 10 μm to 200 μm. The thickness of the surface layer can be changed within a range of 10 μm to 200 μm, and thereby the transmittance of the porous fluororesin as a base material can be controlled within a range of 10% to 20%, for example. Therefore, when the elastic member is used as, for example, a fixing roller of a toner fixing unit, the amount of oil impregnated in the porous fluororesin of the base material can be controlled by the thickness of the surface layer. Further, when the elastic member is used as, for example, a filter for chemical / medical parts, the flow rate of the gas or chemical that permeates the porous fluororesin of the base material is controlled by the thickness of the surface layer, or the gas or chemical is purified. It becomes possible. If the thickness of the surface layer is too thin, the strength of the elastic member may be too small, and the elasticity of the surface layer may be insufficient. On the other hand, if the thickness of the surface layer is too thick, the heat capacity is increased, and the power consumption may not be sufficiently reduced. The thickness of the porous fluororesin can be appropriately determined from the thickness of the surface layer, for example.
The elastic member according to the present invention has a structure in which the base material is made of a porous material, and the surface layer is elastic with a structure in which pores on the surface of the base material are filled with rubber in which a fluorinated polyether skeleton is crosslinked with silicone. Thus, thinning is possible, and the rubber is filled from the surface of the base material so that the distribution is inclined from the surface to the opposite side, or is formed almost uniformly throughout.

The base material is a porous fluororesin, and elasticity is obtained by modifying the surface of the porous fluororesin, making it possible to reduce the thickness of the material, and the rubber filling is distributed from the surface of the base material. Are formed to be inclined from the surface to the opposite side, or are formed substantially uniformly throughout.
(Method for producing elastic member)
As a method for producing an elastic member, a method is used in which a liquid fluorinated polyether skeleton is filled with silicone-crosslinked rubber in pores on one surface of a base material or in pores on both surfaces of the base material. If there is no particular limitation.

  As a method of filling the porous fluororesin of the base material with a rubber in which a liquid fluorinated polyether skeleton is silicone-crosslinked, an uncrosslinked rubber is impregnated into the pores in a liquid flowable state. For example, and then crosslinked. In order to make the uncrosslinked rubber in a liquid flowable state, it is dissolved or dispersed in a solvent and diluted.

  Examples of the method of filling the liquid non-crosslinked rubber into the pores of the porous fluororesin include, for example, a method of immersing the porous fluororesin in a bath filled with the liquid uncrosslinked rubber, There are a method of applying to a porous fluororesin by a transfer method, a centrifugal separation method, a ring coating, and a method of injecting and impregnating a liquid non-crosslinked rubber into a porous fluororesin set in a casting mold. After the rubber is crosslinked to form a surface layer, it is desirable to polish the outer surface of the surface layer with a polishing machine or the like to adjust the thickness of the surface layer and improve the planarity.

(Use of elastic members)
The main use of the elastic member of the present invention is, for example, a toner fixing unit when the base material is cylindrical, and the toner fixing unit such as a conventional fixing roll or fixing belt is used as it is. Can be used as well. Further, for example, it is also suitable for a belt for a belt conveyor that conveys a product having some adhesiveness or an intermediate product. In addition, when the base material is in a tube shape or a sheet shape, for example, chemical / medical parts can be mentioned, and the elastic member is used as it is, as is the case with conventional chemical / medical parts such as chemical / medical tubes and sheets. Can be used for
(Example)
Hereinafter, the present invention will be described in detail based on examples. However, this embodiment does not limit the present invention.

[Toner fixing unit]
As shown in FIGS. 1A and 1B, an aluminum pipe 10 is placed inside a porous fluororesin that is a cylindrical base material 1. Then, as shown in FIG. 2, a rubber 30 (trade name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd.) in which the liquid fluorinated polyether skeleton stored in the coating tank 20 is not silicone-crosslinked is transferred to the primary transfer roller 21. The secondary transfer roller 22 is applied to the outside of the porous fluororesin film of the base material 1 by the rotation of the secondary transfer roller 22.

  As a trade name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd., one-pack type SIFEL 3155 was used. The physical properties of this one-pack type SIFEL 3155 are as follows.

General properties Hardness 55
Physical properties before curing Appearance Milky white liquid, viscosity 23 ° C 40 Pa · s
Physical properties after curing
Specific gravity 23 ° C. 1.87
Hardness 55
Tensile strength 7.8 MPa
Elongation% 250
Tear strength 9.8KN / m
In this manner, the liquid pore fluorinated polyether skeleton is filled with the rubber 30 which is not silicone-crosslinked from the surface side to the outer fine pores of the porous fluororesin of the base material 1, and thereafter, as shown in FIG. The porous fluororesin 1 shrinks and is fixed to the aluminum pipe 10 by heating with a dryer 40 at 80 ° C. for 10 minutes, and the silicone 30 is not crosslinked. Thus, a toner fixing unit was prepared.

  4 is an enlarged cross-sectional view of a part of the toner fixing unit, FIG. 5A is an enlarged view of the surface of the porous fluororesin 2000 times, and FIG. 5B is an enlargement of the surface of the surface layer 2000 times. FIG. As shown in FIG. 4, the pores on the surface of the porous fluororesin of the base material 1 are filled with a rubber 30 in which a liquid fluorinated polyether skeleton is silicone-crosslinked, and then the rubber 30 is crosslinked, An elastic member composed of the surface layer 2 and the base material 1 could be obtained.

  Thus, the surface layer 2 of the base material 1 is formed by filling the rubber 30 in which the fluorinated polyether skeleton is silicone-crosslinked into the pores of the surface of the porous fluororesin of the base material 1, The surface of the porous fluororesin of the base material 1 shown in FIG. 5 (a) is surface-modified as shown in FIG. 5 (b) to obtain a surface layer 2 excellent in releasability with no pores 1a. I was able to. The outer surface of the surface layer 2 is polished, the thickness of the surface layer 2 can be adjusted, and the planarity can be improved. FIG. 4A shows a state before the outer surface is polished. FIG. 4B shows a state after the outer surface is polished.

In this toner fixing unit, the surface of the porous fluororesin of the base material 1 is the surface layer 2 modified by the rubber 30 in which the fluorinated polyether skeleton is silicone-crosslinked, and can be extremely thinned. Thinning is possible. In addition, since the base material 1 and the surface layer 2 are made of a fluororesin and the brittleness of the mechanical strength can be compensated for, a combination of the two is most preferable.
[Fixing device]
FIG. 6 is a schematic configuration diagram of the fixing device. The fixing device 90 includes a pair of a fixing roller 91 and a pressure roller 92 that are pressed against each other and a heater 93 for heating the fixing roller 91.

  In the fixing device 90, the recording medium P carrying an unfixed toner image T (unfixed image) is conveyed to the nip portion N with respect to the nip portion N formed by pressure contact between the fixing roller 91 and the pressure roller 92. Then, the toner image T is fixed to the recording medium P by heating and pressurizing the recording medium P. The recording medium P conveyed to the nip portion N carries a toner image T on the fixing roller 91 side.

  The fixing roller 91 is a toner fixing unit, has a cylindrical shape, and can rotate around its axis. In addition, the fixing roller 91 has a cylindrical elastic member. When such a fixing roller 91 is used, it is possible to exhibit a low heat capacity (that is, a reduction in power consumption) and an excellent fixing property due to the elasticity and peelability of the elastic member, and further by thinning the film.

  The pressure roller 92 has a cylindrical shape, is rotatable around its axis, and is in pressure contact with the fixing roller 91. The pressure roller 92 has a metal cored bar 92A, an elastic layer 92B that covers the outer peripheral surface of the cored bar 92A, and a release layer 92C that covers the outer peripheral surface of the elastic layer 92B.

  In the fixing roll used in the fixing apparatus, a PTFE porous tube having a radial heat shrinkability described in Japanese Patent Publication No. 5-33650 (Porous heat shrinkable tetrafluoroethylene polymer tube and method for producing the same) is used as a base material. Using.

Comparative example

  A fixing roll was prepared using a PTFE porous tube having radial heat shrinkability to try to fix the color toner, but the toner adhered to the porous pores.

  A fuse roll was made by impregnating the product name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd. from the surface of a PTFE porous tube having radial heat shrinkability. Wear of a trade name “SIFEL” manufactured by Co., Ltd. was observed (observation means was found by weight reduction of the fixing roll), but toner adhesion was not observed.

  A fixing roll was prepared by polishing the surface of Example 1. As a result of using 10,000 sheets of A4 copy paper, no toner was adhered and no wear was observed. This reason is considered to be due to a state in which the trade name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd. is embedded in the pores on the surface of the PTFE porous tube having radial heat shrinkability.

  The material constituting the rubber body by entering the pores of the PTFE porous tube having radial heat shrinkability includes a crosslinked silicone elastomer, a urethane elastomer, etc., and these uncrosslinked states are in a liquid state. The elastic layer can be formed by diluting with a solvent and impregnating. However, the required functions of the fixing roll are toner releasability and heat resistance for toner fixing. That is, the heating temperature is required to be 200 ° C. for continuous use, and 200 ° C. for further increasing the temperature raising time (temperature raising speed) when starting up the printer and increasing the printing speed (number of prints per hour). The cross-linked silicone elastomer, urethane elastomer, and the like have been pointed out problems such as inferior heat resistance, toner releasability, and wear resistance.

As a rubber in which the fluorinated polyether skeleton is silicone-crosslinked, the trade name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd. is releasable like PTFE because the surface of its molecular structure is covered with fluorine atoms. It is excellent in heat resistance and excellent in heat resistance. By being located in the pores of PTFE, brittleness of mechanical strength can be compensated for, so that a combination roll of both is provided in a most preferable form.
[Chemical and medical parts]
As a chemical / medical part, the tube-shaped elastic member is a liquid fluorinated polyether skeleton in which a tube-shaped porous fluororesin constituting the base material 1 is stored in an application tank 70 as shown in FIG. Is put in rubber 30 (trade name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd.) that is not silicone-crosslinked, and rubber 30 is applied to the entire porous fluororesin film 1. As a trade name “SIFEL” manufactured by Shin-Etsu Chemical Co., Ltd., a one-pack type SIFEL 600 series was used.

  In this way, the entire pores of the porous fluororesin are filled from the surface side with the rubber 30 in which the liquid fluorinated polyether skeleton is not silicone-crosslinked, and then, as shown in FIG. The rubber 30 that is not silicone-crosslinked is crosslinked by heating by applying heat to produce a chemical / medical part.

  8A is a partial cross-sectional view of the chemical / medical part in the axial direction, FIG. 8B is a cross-sectional view of the chemical / medical part, and FIG. 8C is an enlarged cross-section of a part of the axial direction. FIG. As shown in FIG. 8, the rubber 30 in which the liquid fluorinated polyether skeleton is silicone-crosslinked is filled in the pores on both the inner and outer surfaces of the tube-shaped porous fluororesin constituting the base material 1. Thereafter, the rubber 30 was crosslinked to obtain a chemical / medical part having a layer structure having the surface layer 2 on both sides of the base material 1. As a chemical / medical part, it can be used, for example, for a liquid feed tube.

[Chemical and medical equipment]
As a chemical / medical apparatus having chemical / medical parts, for example, an infusion set is shown in FIG. The drip set 81 is configured by connecting a drip chamber 82 and infusion tubes 83 and 84 upstream and downstream of the drip chamber 82, respectively. The drip chamber 82 can perform the role of the drip rate observation unit and the liquid reservoir collectively. A bottle needle 85 is attached to the tip of the infusion tube 83, and a puncture needle 86 is directly attached to the tip of the infusion tube 84. The drip chamber 82 and the infusion tube 84 are preliminarily filled with a solution such as physiological saline or glucose. In the middle of the infusion tube 83, a bag 88 in which a solution such as physiological saline or glucose is enclosed via a connecting tube 87 is attached.

  Next, an example of how to use the drip set 1 will be described with reference to FIG. The bottle needle 85 is inserted into the drug solution bottle 89, and the insertion needle 86 is attached to the tip of the infusion tube 84. Subsequently, the solution in the bag 88 is filled into the infusion tube 83, the bottle needle 85, and the drip chamber 82. The bottle needle 85 is connected to the drug solution bottle 89, and the drug solution in the drug solution bottle 89 is introduced into the drip chamber 82 while being dissolved in the infusion tube 83.

  Next, when the clamp 82a is opened, the solution falls naturally, and the infusion tube 84 and the insertion needle 86 are filled with the solution. The drug solution is filled in the drip chamber 82, and bubbles in the drug solution are collected in the upper part of the drip chamber 82, and there is no possibility that the bubbles are mixed into the infusion tube 83. The drug solution is infused into the patient via the insertion needle 86 while being dissolved in the drip chamber 82 and the infusion tube 84. The infusion rate of the chemical solution can be adjusted by the clamp 82a. As the infusion tubes 83 and 84 and the connecting tube 87, the tube-shaped chemical / medical parts prepared in FIGS. 7 and 8 were used. The tube-shaped chemical / medical parts created in FIGS. 7 and 8 can be used as a liquid feeding tube of a chemical experiment apparatus.

The present invention can be applied to an elastic member that has elasticity and enables thinning, a method for manufacturing the elastic member, a toner fixing unit formed of the elastic member, and a fixing device using the toner fixing unit.

It is a schematic diagram which shows the state which put the aluminum pipe inside the roll-shaped porous fluororesin film which comprises a base material. It is a figure which shows the state which apply | coats the rubber | gum by which the liquid fluorinated polyether frame | skeleton stored in the application tank is not silicone-crosslinked on the outer side of porous fluororesin. It is a figure which shows the state which bridge | crosslinks the rubber | gum which is not silicone crosslinked. FIG. 4 is an enlarged cross-sectional view of a part of a toner fixing unit. It is a schematic diagram which shows the structure of the surface of a porous fluororesin, and the surface of a surface layer. 1 is a schematic configuration diagram of a fixing device. It is a figure which shows the state which apply | coats the rubber | gum by which the liquid fluorinated polyether frame | skeleton stored in the application tank is not silicone-crosslinked on the outer side of porous fluororesin. It is a schematic diagram which shows the layer structure of chemical / medical parts. It is a figure which shows an infusion set.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base material 1a Porous surface of porous fluororesin 2 Surface layer 10 Aluminum pipe 20 Coating tank 21 Primary transfer roller 22 Secondary transfer roller 30 Rubber in which liquid fluorinated polyether skeleton is not silicone-crosslinked 40 Dryer 70 Application Tank 81 Drip Set 83, 84 Infusion Tube 87 Connection Tube 90 Fixing Device 91 Fixing Roller 92 Pressure Roller 93 Heater

Claims (5)

An elastic member provided with a surface layer on a base material,
The base material is a porous fluororesin,
The surface layer is formed by filling rubber in which the fluorinated polyether skeleton is silicone-crosslinked from the surface side only in the pores on the surface of the base material ,
The elastic member , wherein the surface layer has an outer surface polished to have a layer thickness adjusted . The elastic member according to claim 1, wherein the porous fluororesin is porous polytetrafluoroethylene. A toner fixing unit comprising the elastic member according to claim 1 . A fixing device comprising the toner fixing unit according to claim 3 . A method for producing the elastic member according to claim 1 or 2 ,
From the surface side only in the pores of the surface of the base material, filled with a rubber in which the liquid fluorinated polyether skeleton is not silicone-crosslinked,
Then the rubber is crosslinked to form the surface layer ,
The method for producing an elastic member, wherein the surface layer is prepared by polishing an outer surface and adjusting a layer thickness .