JPS5948780A - Toner image fixation method - Google Patents

Abstract

PURPOSE:To perform toner image fixation which never causes back surface contamination by allowing at least polyhydric alcohol to reside at a member which contacts the outer circumferential surface of a fixing roll directly or indirectly. CONSTITUTION:A cleaning roll 4 collects sticking toner on a heat roll 1 over its outer circumferential surface. In this case, the polyhydric alcohol comes out of an internal liquid holding layer 6 to the outer circumferential surface of the roll 4, so toner collected on the outer circumferential surface or deposited material increases in elasticity when dissolved and the heater 3 of the roll 1 is turned on; even when the toner material on the roll 4 is heated and dissolved, it is inhibited from moving to the roll 1 and also inhibited from moving to a press-contacting roll 2 as a result, so that back-surface contamination is prevented.

Description

[Detailed description of the invention]

In the present invention, a layer image formed by an electrophotographic method, a static recording method, an electrostatic printing method, etc. is fixedly deposited on the support. The present invention relates to a toner image fixing method for fixing a toner image. Conventionally, various fixing devices have been proposed and known for fixing such a toner image. For reasons such as 1), for example, it is composed of a constant inspection heat roller that has a rotary opening inside the heat source, and a pressure roller that rotates in the direction of force without being in pressure contact with this heat roller. The contact heating fixed stone device has been widely put into practical use.The contact heating fixed method is preferable in these 42 points, but in this method, the toner image and the heating roller are Due to the contact, the toner is eroded onto the heat roller, and this toner is transferred to the support supporting the subsequent toner image. Conventionally, cleaning members such as cleaning webs, cleaning blades, and cleaning rollers have been used to remove toner adhering to the surface (in case it is necessary to clean the toner). A so-called backside stain phenomenon occurs.This backside stain phenomenon occurs when the toner material deposited on the cleaning member is subjected to excessive heat, and the toner material is transferred to the heated roller and is subsequently fed. It stains the surface of the support such as transfer paper, and also transfers to the pressure roller that is being pressed, and the surface of the support becomes dirty due to the transfer of this pressure roller. When we determined that the surface dirt should be within j of 13 +! That is, conventionally, thermoplastic resins mainly composed of styrene-acrylic yarn copolymer have been used poorly as binder resins for toners, but these resins have low elasticity when melted in a bath. Therefore, even if the toner is once collected in the cleaning part paulownia, for example, when the heater of the heat roller is turned on, the toner accumulated on the cleaning member 3 material = ¥!A purchase. For example, 10 to 6 from the set temperature of the heat roller.
When heated to a temperature 0°C higher, it transfers to the heated roller, resulting in surface staining. If the toner is given such elasticity during melting that it does not cause surface staining from the beginning, it is difficult to perform ηI right satisfactorily due to poor toner properties. The present invention has been made based on the above-mentioned circumstances, and an object of the present invention is to provide a toner that is free from surface contamination and urine. The toner fixing method is achieved by a toner permanent fixing method characterized in that at least a polyhydric alcohol is present in a member that faces or indirectly contacts the circumferential surface of the fixed roller. Ru. I will specifically explain the sewage invention. In the present invention (2), a fixing device equipped with a constant heat roller for fixing toner particles on a support is provided with an outer peripheral surface of the roller (directly or indirectly). Touching T 6 J: For example, at least a polyhydric alcohol is present in the cleaning member, and in this state, the support is fed to the cleaning device and the toner record supported thereon is cleaned. The temperature of the regular accommodation here is 130-23 +I
It is preferable to set it as C. Such force removal (two folds is caused by the ester part in the binder resin of the toner, and υ is the ester part in the styrene-acrylic branched ester thread symbiotic base), as shown in the anti-Lj set shown below. 111D alcohol causes so-called transesterification, and as a result, molecules of the binder resin form a cross-linked 4A structure.This cross-linking reaction reduces the elasticity of the toner substance collected on the cleaning member when it is fused. Even if the toner material increases in thickness and is heated by the regular heat roller to a temperature higher than the regular temperature, the transfer of the toner substance to the heat roller and the transfer to the pressure roller is inhibited, and eventually The occurrence of surface stains is sufficiently prevented.
21? '-011 (However, R1 represents the ester bond formed in the acrylic ester, and R2 represents the bonding group wb in the 2411i alcohol.) Examples of the polyhydric alcohol include ethylene glycol, diethylene glycol, Triethylene glycol, tetraethylene glycol, 1,2-propylene glycol, 1,3-propylene glycol, 1,4-butanediol, neopentyl glycol, 1,4-butynediol, sorbitol, 1,2.3.6 -heginanedetrol, ], 4-sorbitan, pentaerythritol, dipentaerythritol, tripentaerythritol, 1,2,4-butanetriol, 1,2,5-pentanetriol, gly-neptanetriol, 2-methylpropanetriol , 2-methyl-
Mention may be made of 1,2,4-butanetriol, trimethylolethane, trimethy[J-propane, 1,3,5-trihydroxymethylbenzene, and others. The polyhydric alcohol actually used is selected depending on the type of resin forming the binder resin of the toner. This polyhydric alcohol (1 fl + alcohol) has a tn point that is higher than the boiling point of the -r6 alcohol produced by the ester conversion reaction between this polyhydric alcohol and the binder m fat nocarboxylic acid ester moiety. In the present invention, in order to promote the reaction between the binder resin of the toner and the polyhydric alcohol, it is preferable that the ester conversion reaction is further promoted. It is polite to have a reaction accelerator present with the polyhydric alcohol in the part that comes into contact with the toner.
Reduces the elasticity of fat for a short time. ) 13 Examples of such reaction-promoting products include Zutra-t.
-Butyl titanium awakened ester 4 IJ is commonly used as a toner, and acrylic white ester or methacrylic shell ester is generally used as a binder for this extraction. The unobtainable polymer or copolymer, for example, υ+y, is composed of a resin whose main component is a combination of sunalene and acrylic yarn. In this styrene-acrylic typical combination, the styrene component υ) fSl, styrene monomers include, for example, styrene, 0-methylstyrene, 111
-Methylstyrene, p-methylstyrene, α-methylstyrene, ■)-ethylstyrene, 2,4-di,methylstyrene, p-n-7 tersterene, p-tert-butylstyrene, p-n-hexylstyrene, p -n-Maritellus f L/n, ρ-n~~nonylstyrene, p-
n-decylstyrene, p -n-dodecylstyrene, p
-methkinstyrene, p-phenylstyrene, p-chlorostyrene, 3,4-dichlorostyrene, and the like. In addition, examples of acrylic cores for the acrylic component in the styrene-acrylic thread combination include acrylic methyl, acrylic decoction ether, and acrylic M.
``-butyl, isobutyl acrylate, propyl acrylate, acrylic I!iken-octyl, acrylic dodecyl, acrylic lauryl, acrylic@2-ethylhegycyl, acrylic stearyl, 2-chloroethyl acrylate, acrylic phenyl, α - Methyl chloroacrylate, methyl methacrylate, ethyl methacrylate, propyl methacrylate, ln-butyl methacrylate, isobutyl methacrylate, n-octyl methacrylate,
Methacrylic 1 fire dodecyl, Methacrylic string lauryl,
α-methylene + IhH1i group monocarboxylic acid enethers such as methacrylic 2-ethylhexyl, methacrylic stearyl, phenyl methacrylate, methacrylic branched dimethylaminoether, methacrylic branched diethylaminoethyl; acrylonitrile, methacrylonitrile,
Acrylic acid or methacrylic acid such as acrylamide 1
It is possible to reduce the amount of ml and other items. These simplices can be used in class A or in combination with algebraic ones. 6ij Polyhydric alcohol may remain -ε if it is a liquid itself, but if it is a solid, it will be 1G, so
111. The molecular 'rM limbs etc. as a whole are liquid-like. i
, b; The outer circumferential surface of the heat roller for the 15-day heat roller (2-4- contact with the liquid 1-(□+ It is preferable to purchase the powder in the form of a powder or with a liquid holder, and then to make the powder holder impregnate and hold the liquid polyhydric alcohol.Specifically, In the first ward, as shown in 74:XT, there is a barrier made of 10 roniteflon around the outer circumference of the mining drum.W
A heating roller 1 and a soil rolling roller 2, which is provided with silicone rubber on the outer circumferential surface of an inner drum and which is placed in pressure contact with the roller 1, are provided. In the T-type device, a heater 3 is disposed in the inner space C- of 1, and a cleaning roller 4 is further provided so as to be in contact with and driven by the heat roller 1. A made of silicon bt w com on the outer peripheral surface -L
A surface layer 7 made of heat-resistant nylon felt is provided on the outer circumferential surface of the cropping layer 6 in the center of the cropping layer 6, and the liquid retaining layer 6 is impregnated with polyhydric alcohol to retain the liquid. urge P is a support body, T is a toner group, and W is a support oil path. When using a device having such a configuration, the cleaning roller 4 collects the adhering toner on the heat roller 1 on its outer circumferential surface, so that toner substances are deposited on the outer circumferential surface -L. The outer peripheral surface of this cleaning roller 4 (
2) Since the polyhydric alcohol is leached from the internal LFK body holding solution 6, the toner collected or the toner material deposited on the outer peripheral surface (2) becomes more neutral when melting the bath (7). (Number 2), as a result, heater 3 of heat roller l
Even if the toner material on the cleaning roller 4 is heated and melted in the bath when the switch is turned on, it is prevented from being transferred to the hot roller 1, and as a result, the toner material is also prevented from being transferred to the pressure roller 2. , it is possible to prevent the occurrence of the phenomenon by closing the surface. Figure 2 IJ, Figure 1 (Cleaning in the second

[Hoop 4
Same as 1 Funo (+W Ink value Δ body supply roller 11
However, the cleaning web 14 is brought into contact with the hot roller l via the cleaning web 14 transported by the rolls 12 and 13, and according to this example, the cleaning web 14
The toner materials collected and deposited on the cleaning web have increased elasticity when melted in the bath, thereby reliably preventing the occurrence of surface staining and prolonging the service life of the cleaning web. FIG. 3 shows a brush type cleaning roller 20, and a limb holding member 21 is provided so as to come into contact with this cleaning roller 20.
1 is impregnated with polyhydric alcohol. Also in this example, the same effects as in the example of FIG. 1 can be obtained. . As described above (2. According to the present invention, in a toner sphere fixing method using a force-type contact heat setting method, the elasticity of the toner material collected on the cleaning member after adhering to the fixing roller when melted is increased. Therefore, the transfer of the toner material to the heat roller, which would occur if there was no increase in elasticity, does not occur, and therefore, the transfer to the pressure roller is unlikely to occur.
It is possible to prevent the occurrence of surface stain Jt phenomenon, and as a result'
A well-defined 6T image can be obtained in the same way. And in order to stop the occurrence of surface stains and surface stains, is there a binder resin for the toner that has a high elasticity when melted in the bath? There is no need to use it, and therefore it is avoided to sacrifice the fixing properties of the toner itself, and in this respect as well, a good =T visual quotient image is formed. The method of the present invention can be applied to an apparatus (
Of course, it is also possible to implement the method in two ways, and the method is limited to supplying polyhydric alcohol to the cleaning member as in the example shown in the figure. For example, roller-like members may be brought into contact with each other, and in this case, the tJ toner on the heat roller comes into contact with the polyhydric alcohol and is then cleaned by the cleaning section 4N.
Clean parts with polyhydric alcohol 1≦
The heating roller area on the upstream side (2) is preferably provided in contact with the cleaning area with the material.Also, as mentioned above, it is preferable to use the polyhydric alcohol in liquid form, but in this case For each piece TC
A carrier liquid can be used; 0) A carrier liquid that is stable to heat is desirable. Furthermore, when the carrier lfk body has releasability, a small amount of this carrier powder is also supplied to the surface of the heat roller, so that the toner of the toner image to be fixed is transferred to the heat roller. The effect of suppressing 1.1 blindness can be obtained. From this point of view, it is preferable to use silicone oil as the carrier liquid. The ratio of the carrier liquid and polyhydric alcohol in this silicone oil bamboo varies depending on the type of binder resin in the toner, but is 1:99 to 99.
: Lotus spreads from the range of 1, the trace is 95-50: 5-50
It is said that Examples of the present invention will be described below. Implementation + y111 Carbon succession 60-Ra cornering Naruko' Kushinryosha rU-Hi
xVJ (manufactured by Roku Konishi Photo-I-Nanel) Used for Kai J coins, this fixed stone roller is impregnated with silicone oil containing diethylene glycol and Luque (10 Litl), and styrene-acrylic. Two copy tests were carried out over 30 times using a developer consisting of toner containing ester resin as the main component. As a result, the obtained Almost no dirt was observed on either surface.Furthermore, the toner substance on the cleaning roller after the copy test was solidified.In contrast, when the right roller contained only silicone oil,
t and the same (71 2 strokes copy test (for 2, the number of copies I made was 2 (1 (copy Q from around the 10th time))
Dirt appeared on the surface. [Execution υ1] 2 In Example 1, instead of /I diep° lengelicol (2, tetraethylene glycol, and anti-L0, promotion) LL Monoga, 5 liters for said tetraethylene glycol.
30 f+ (1 time (-covites) Y was carried out in the same manner as in Example except that the tetra-1-butyl titanium butyester of Jika was used. As a result, 1 bI: month) old) sheet 0 ．． ) No leakage was observed on both the front and front sides of the copy, and the toner particles on the cleaning roller after the copy test were solidified. On the other hand, in a copying test conducted in the same way with a regular roller (- silicone oil only and not impregnated with silicone oil)
Item 0) In the back mountain l (I talked about it. ・11 Figure m1υ) Interval t41 explanation 1st section ~; A theory that shows examples of the composition of π stone tools! '
jIII 1j + mon - different. 1. Silent roller 2.. Pressure roller 3. Heater 4.. Cleaning roller 5.
9 out, i-, 6...11 ri (Song dynasty Mochiha 417
11 Surface rib 11・l λ body supply roller 12, l
:j...Roll 14-/Leaning web 20
・Bran-type cleaning roller 21 ・Adult maintenance
-“, Figure 1 Figure 2 Figure 3 Decoy

Claims (1)

[Claims] 1) A fixed method in which the support supporting the toner image is brought into pressure contact with a fixing roller and the toner is fixedly attached to the support (
2. A toner mound fixing method characterized in that at least a polyhydric alcohol is present on the outer circumferential surface of the Mi+ marking right fixing plate (-) which is in direct or indirect contact with the outer circumferential surface of the toner mound fixing plate.