JPS5948781A - Toner image fixation method - Google Patents

Abstract

PURPOSE:To perform toner image fixation which never causes back surface contamination by allowing at least polyhydric amine 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 amine 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 The present invention provides an Ichiko-Kasada method, an electrostatic recording method, an electrostatic printing method, etc. to develop a latent image formed using a humane toner on a support.
The present invention relates to a toner image fixing method for fixing a toner image formed by one nib on its support.

In the past (2), for example, a fixed device for each building has been proposed and known in order to store such toner images, and for reasons such as special ≦2 thermal efficiency and no risk of fire, etc. A contact heating type fixing device is widely put into practical use, and is composed of a fixed heat roller capable of rotating at a high speed, and a pressure roller that rotates in the same direction while being in pressure contact with the heat roller. In this way, the contact heating fixing method is preferable in terms of the structure, but in this method, since the toner image and the fixing heat roller come into contact, the toner sticks to the heat roller and this There is a drawback that the toner image is reattached to the supporting body that supported the toner image, and the fixed image is warped.Therefore, it is necessary to perform the toner cleaning process with a heated roller (after observing the toner image for two inches). Conventionally, cleaning members such as a cleaning web, a cleaning blade, and a cleaning roller have been used.

However, when such a leaning member is provided, a so-called back 1I111 peeling phenomenon occurs. This backside staining phenomenon occurs when the toner material deposited on the cleaning member is exposed to excessive heat, and the toner material is transferred to the heated roller and then transferred to the surface of the support such as transfer paper. 2. Toner that is stained and transferred to the pressure roller that is pressed by the heat roller is stiff and transferred to the pressure roller! IΔ′i! support U) JA
1141 is the Hikito that will be polluted.

When we investigated the cause of the surface stains, we found that the impact of the toner during electrofusion has an important relationship with this surface stain. For example, thermo-pJ plastic resins mainly composed of styrene-acrylic copolymers have been praised as binder resins, but these resins have low elasticity when melted and are easily transferred. Therefore, even if it is once collected by the cleaning member, for example, if the heater of the heat roller is turned on,
f, etc. (2) The toner material deposited on the cleaning section is, for example, 111.
When heated to a temperature 60° C. higher, it transfers to the silent roller, resulting in surface stains. If the toner is given the 5-A property of bath melting 19 that prevents surface staining from the beginning, the fixing property is poor and it is difficult to perform fixing sufficiently.

The present invention has been made based on the circumstances as described in 2.It is an object of the present invention to provide a method for removing toner particles without causing the surface to become obsolete.

The purpose of this is to press the toner image support 1 to a fixed roller and apply the toner 1ψ onto the support using a fixed method, in which the surface of the fixed roller is directly or indirectly applied to the circumferential surface. The toner image forming process is achieved by a conventional method, characterized in that at least a polyvalent amine is present in the contact area.

The present invention will be specifically explained below.

In the present invention, in the IJ, a jigureki equipped with a heat roller for fixing the toner powder on its support, the heat roller's heat roller is brought into direct contact with the circumferential surface and also in contact with the LJ, + mutually. In order to do this, at least a polyvalent amine is present in the cleaning section, and in this state the support is fed to the stone tool and the toner image supported thereon is fixed. Here is the fixed accommodation 7ilA 13J is 130~2
The temperature is preferably 30°C.

According to this method, the ester moiety in the binder resin of the toner (for example, the ester moiety in the styrene-acrylic acid ester conjugate) is converted into a so-called ester by a polyvalent amine, as shown in the reaction formula shown below. Exchange occurs, and as a result, the molecules of the binder resin come to form a crosslinked structure. Such a crosslinking reaction increases the melting property of the toner collected on the cleaning member, and therefore, even when heated by the fixing heat roller to a constant t7 crystallinity 1) 1nA degree, The transfer of the toner substance to the heat roller and to the contact roller is inhibited, and the occurrence of the problem is sufficiently prevented.

Reaction formula % Formula %) ((!!, L, ■<1 represents the group 7 forming the ester bond in the acrylic ester, ■<2 and l
(4 represents an alkyl group, an allyl group, a hydrogen atom, etc., and R
” is a divalent amine (bond at 2).

The base is expressed. ) +ii+ g As the amine, for example, ethylene diamine, propylene diamine, tetramethylene diamine, alkylene diamine such as hexamethylene diamine, 1,2,3-) lyaminopropane, tris (2-
trivalent amines such as diethylenetriamine, triethylenetetramine, tetraethylenepentamine, bis(4-aminotubinal)amine, bis(5-aminoethyl)amine,
-aminopentyl)amine glue (bis(aminoalkyl conversion of ammonia, p-phenylenediamine, Il
Aromatic diamines such as 1-phenylenediamine, 2,6-icy amine naphthalene, 2,5-diaminopyridine, cyclic alno-J such as 1,4-diaminocyclohexane, 1,4-diaminocyclohexane, etc.
11il amine, isopropyl-tris[2-N-(2-aminoepurunaminoethyl)titanium 6, varnish 7, 1 + 3L bis(3-aminopropyltetraethquine)-disiloxane ) amines (a) and 7-noargyl-substituted amino groups of polyvalent amines in item iJ can also be used in the present invention (1).

Toners suitable for carrying out the method of the present invention (1) are generally toners of this type; Examples include polymers or co-polymerized polymers, such as those consisting of resins that have a styrene-acrylic thread copolymer as the soil strength.Styrene mono-11 (for the styrene component in this styrene-acrylic copolymer) can be mentioned. For example, styrene, 0-methylstyrene, m-methylstyrene, p-
Methylstyrene, α-methylstyrene, p-ethylstyrene, 2,4-dimethylstyrene, r)-n-butylstyrene, I)-tert-butylstyrene, l]-
〇-Hexylstyrene, 13-11-octylstyrene, p-n-nonylstyrene, l)-n-decylstyrene, p-1+ -dodecylstyrene, p-methoxystyrene, 1)-nonylstyrene, p-chlorostyrene ,3
, 4-dichlorostyrene, etc.

As the acryl 4i digit body for the acrylic component in the mafokosuzo-ren-acrylic thread co-fastening piece, 1 nori is acrylic Atsushi, Notel, acrylic attached enal, acrylic 1-butyl, acrylic isobutyl, acrylic acid proyl, Acrylic Bn-octyl, dodecyl acrylate,
Acrylic dazzling lauryl, acrylic mouse 2-ethyl hequinle,
Acrylic chloride, acrylic alcohol, 2-chlorenal,
Acrylic liquor phenyl, α-chloroacrylic hk methyl,
Methyl methacrylate, ester methacrylate, propyl methacrylate, C n-butyl methacrylate, isobutyl methacrylate, menacrylic% r]-octyl, dodecyl methacrylate, methacrylic r & lauryl, methacrylic acid 2- α-methylene aliphatic monocarboxylic N'd-Ndels such as ethylhexyl, stearyl methacrylate, phenyl methacrylate, dimethylaminoether methacrylate, diethylaminoethyl methacrylate; acrylonitrile, methacrylonitrile,
It is important to avoid using acrylic acid or methacrylic acid derivatives such as acrylamide, and others. These single rodent bodies may be present singly or in combination kA'. It can be used in conjunction with t1.

If the polyvalent amine itself is a liquid, it may be left as it is, or if it is a solid, it should be in a liquid state as a whole due to the bath, and the heat roller for the W right should be in a liquid state. The outer circumferential surface (the member in direct or tangential contact with the porous material) is made of a porous material. It is preferable that the carrier contains a Hk-type polyvalent amine.

Specifically, a fixing heat roller l provided with a coating layer as shown in FIG. Pressure welding - A contact roller 2 formed by providing a silicone layer on the outer periphery 1 of a metal drum provided with a filter is squared with a heat roller I L/l.
Inside Y + ii ' Heater 3 is installed inside Shiba, and -
), also in a stationary machine which is provided with a cleaning roller 44' to be driven in opposition to the J-ra 1, the cleaning roller 4 is placed on the outer circumferential surface of the metal shaft 5 (
A liquid retaining layer 6 consisting of two silicones and another rubber 1) is pre-formed, and 1...
・Provide a layer of raw nylon felt with J-heat 1 and form a layer 7 to impregnate the liquid retaining layer 0 with a polyvalent amine. P is the support, i”&#: )ner image, W
is the support passage.

When using a device with such a configuration (Secondly, cleaning U
4 is hot on its outer peripheral surface.
Since the right toner is extracted, the outer circumferential surface -L (second is the toner material). Since the amine has been leached out, the toner collected on the outer circumferential surface or the accumulated toner becomes heavier when the bath melts, and as a result, the heater 3 of the heat roller 1 is turned on. Even if the toner material on the cleaning roller 4- is heated and melted, it will be prevented from transferring to the heated roller 1, and as a result, the toner material on the pressure roller 2 will also be generated. The transfer is inhibited, and the occurrence of surface tension retraction can be stopped.

In FIG. 2, the cleaning roller 4 in FIG.
．． According to this 4!/lJ i2, the cleaning web 14 is brought into contact with the thermal roller 1 via the cleaning web 14 transferred by the
The elasticity of the pressed toner increases when it melts, and the occurrence of surface ah + stains is definitely stopped, and at the same time, the cleaning web 1
Use of 4 - J, 11 violets or longer.

FIG. 3 shows a blank type cleaning roller 20 1), and a compact holding material 21 is installed (removed) so as to come into contact with this cleaning roller 20, and this D-body holding material 4.J'
21 + - polyvalent amines are included r). And in this example, as in the example in Figure 1, υ〕Sakugetsu 1 :;:)J
Get the fruit.

As described above, according to the present invention, in the fixing of toner images by the welding IJ (thermal fixing method), the toner particles collected by the cleaning member after being placed in the heat roller for fixing at 1:1 are
斗）j″LlQ）吾 7 連 1 [”Since the weight of the weight is j blue, I would ask if there was no stomach fat in the middle 111,
The first performance of the toner against the hot roller is 0) Transfer does not occur. You can do this and the result will be very clean.
you,! ll river 1 can be obtained. and surround
Is the toner's binder resin elastic or thick when melted in order to stop the warping of the actual ball by 1υJ?
There is no need to use toner, thus avoiding sacrificing the properties of the toner itself, and in this respect also a distinct visible image is formed.

It goes without saying that the present method can be carried out with a device other than the one shown in the figure, and can also be carried out with a device having its own structure, and can also be carried out in a cleaning section as shown in (;1). For example, the polyvalent amine may be held on the outer circumferential surface of a heat roller for constant energy, and a U-shaped member such as K(yl) or U-shaped member may be brought into contact with it. In this case, the toner on the heated roller comes into contact with the polyvalent amine and is cleaned using a cleaning member (a part holding the polyvalent amine). ,
Cleaning member (two cleaning areas 11-1)
It is preferable to provide it above the heating roller on the x3ti side, facing the ship.

Good, like the polyvalent amine LJ series, overall 2 is t17
In this case, one or more suitable carriers can be used, and the carrier liquid is preferably one that is stable against heat. When the carrier liquid has mold releasability, ≦2 is the surface of this carrier liquid raft and the hot roller (2 is also supplied, even if only in a small amount, so the fixed toner image is This has the effect of suppressing the toner from adhering to the heat roller.From this point of view, it is preferable to use silicone oil as the carrier liquid. The ratio varies depending on the type of binder resin in the toner, but it is 1:99 to 99:1.
The range L! Selected from t+, usually LJ, 95~5C) = 5
~50.

Examples of the present invention will be described below.

Harvest misfortune 111 Electronic photocopy that lights the Mori Station Roller 1. N.

[U -B + Impregnated with Step 1 non-acrylic acid ester resin')j
50% using a one-component toner consisting of 1j
I passed the copy test 00 times.

As a result, almost no lJ5 cracks were observed on the surfaces of the 5,000 pieces obtained. Furthermore, the toner material on the cleaning roller after the copy test was solidified.

On the other hand, in a similar copy test in which the cleaning roller was impregnated with only silicone oil,
When the number of duplications reached 2000, stains appeared on the surface of the copies.

Example 2 50 was prepared in the same manner as in Example 1 except that diethylenetriamine was used instead of 1.3-4: pinu(3-aminopropyl)-tetraethoxydisiloxane.
A copy test was conducted 00 times.

As a result, almost no stains were observed on the front and back surfaces of the 5,000 copies obtained. In addition, the 1st layer on the cleaning roller after the copy test was solidified.

In a copy test conducted in the same manner with only the cleaning roller impregnated with silicone oil, from around the time the number of wrappings reached 2000,

[Brief explanation of the drawing]

Figures 1 to 3 each show the method of the present invention. ) is a cross-sectional diagram showing an example of the structure of a joseki tool that is commonly used in practice. 1. Heat roller 2. Pressure roller 3.. Heater 4.. Cleaning roller 5.
・・Axis, d・6・・Liquid holding layer 7 Table 1 Armor 11・Liquid supply roller 12.13
・Roll 14 ・Cleaning web 2+l Fu 5
C-shaped cleaning rollers 21...7 (1 unit holding material agent Masahiko Inui, patent attorney...)

Claims (1)

[Claims] 1)) In a fixing method in which a support supporting a toner image is brought into pressure contact with a fixed roller and the toner image is fixed on the support, at least a polyvalent material is added to the surface directly or indirectly in contact with the outer circumferential surface of the fixing roller (n11). A toner image fixing method characterized by the presence of an amine.