JPS60225167A - Microcapsule type toner - Google Patents

Abstract

PURPOSE:To permit controlling of the degree of crosslinking of a resin for an outside wall for the purpose of coating a core material and eventually formation of the resin having adeqaute mechanical strength by consisting said outside wall of the specific resin as a principal component. CONSTITUTION:The outside wall of a microcapsule type toner having the core material contg. a pressure fixable material and the outside wall for coating the core material consists essentially of (A) a polyamide resin or polyester resin obtd. by using acid chloride and amine or polyol either of which consists of a mixture composed of >=2 kinds and (B) a polyurea resin or polyurethane resin otd. by using isocyanate and amine or polyol either of which consists of a mixture composed of >=2 kinds. The resin A and the resin B may be a 100% copolymer consisting of both resins and may be partially the copolymer or may be a blend. The 3rd resin component may be incorporated as a copolymer or blend therein in addition to the resin A and the resin B if necessary.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to a toner for developing electrostatic images, and more specifically to a microcapsule type toner that can be suitably used as a pressure fixing type toner. be.

[Prior art]

In recent years, an electrostatic charge image is formed based on image information using electrophotography, electrostatic printing, electrostatic recording, etc., and this is developed with a developer toner to form a toner image. 2. Description of the Related Art It is widely practiced to form a visible image by transferring an image to a transfer paper or the like and then fixing it.

Conventionally, as a toner for developing electrostatic images, a powdered toner obtained by finely pulverizing a thermoplastic resin bi/goo containing a coloring agent such as carbon black dispersed therein has been widely used. 9. If it is a two-component toner, mix and stir it with a carrier such as iron powder or glass beads, or if it is a one-component toner containing fine magnetic powder, stir the toner itself. The toner image is triboelectrified using K, and the electrostatic force is used to develop an electrostatic charge image, and the resulting toner image is transferred, for example, and then heated and fixed using a heating roller or the like.

However, in such toner traps, the toner particles are crushed during agitation for triboelectric charging, producing fine powder toner, resulting in poor visible image quality, and the theory is that the toner is prematurely renewed. Not only does it need to be replaced, but also because fixing is achieved by a heat fixing method.
It takes a long time to wait for the fuser's heater to rise to the desired set temperature, and it also requires a lot of energy to heat up, which can lead to a fire if a paper jam occurs in the fuser. In order to achieve consistent and reliable fixing, it is necessary to satisfy fairly strict requirements regarding temperature conditions, etc. Under these circumstances, a method of fixing using pressure has been proposed. ing. That is, a pressure swamp method has been proposed in which toner particles are fixed to an image forming support by applying pressure to the toner, for example, as disclosed in U.S. Pat. No. 3,269,626.
The method described in the patent specification is known. Since this method does not require the use of heat or solvent, it has the advantage that it does not cause various problems, does not require a warm-up time of 70 degrees, and requires less energy for fixing.

However, the pressure fixing method described above has poor fixing properties compared to fixing methods using heat, etc., and is easy to peel off when rubbed, and requires high pressure, which can destroy the fibers of the image forming support, such as copy paper, and cause the paper to deteriorate. There were disadvantages such as the paper becoming weak and the surface of the copy paper becoming excessively glossy.

In order to solve these drawbacks, research has recently begun on the use of so-called microcapsules as toners for developing electrostatic images. This microcapsule type toner is a powdered toner in which a liquid material exhibiting pressure fixing property or a soft solid and a color abrasion are enclosed as a core material in fine particle resin capsules.

Cono microcapsule toner can encapsulate adhesive soft solids in the core material, so it has better powder properties and can be fixed at lower pressure than conventional pressure fixing toners made of a single resin. It is expected to have the advantage that aggregation, blocking, etc. do not occur during toner production or storage.

However, the reality is that conventional microcapsule-type toners have not been found to be completely satisfactory. A technique for obtaining a polyamide model through polycondensation with acid chloride has been disclosed, but when attempting to produce a microcapsule toner using acid chloride, hydrolysis of the acid quarride occurs when it is made into small particles, resulting in a stable film-forming reaction. There is a problem that it cannot be carried out, and especially when the emulsion is manufactured with a KDH of 7 or higher, the rate of hydrolysis is .4. This poses a serious problem in applications such as microcapsule toner, which require small particles of 8 to 25 μm.

Japanese Patent Application Laid-Open No. 56-64349 discloses a technique for using cross-linked gluing on outer walls, and Japanese Patent Application Laid-Open No. 57-17986
Publication No. 0 discloses a technique in which a polyurethane resin or a polyurea resin is obtained by polyaddition or condensation of iso/anate and diamine, etc., and this is used as an outer wall. According to this technique, crosslinking certainly increases the strength and rigidity of the outer wall resin, but on the other hand, when used as a toner, the impact strength decreases and the brittleness becomes strong, causing toner particles to form in the developing device. When mechanical force such as stirring or classification is applied, part of the outer wall tends to be easily destroyed, resulting in a decrease in vigor.

Furthermore, JP-A-58-6TI948 discloses a technique in which the outer wall is made of a polyurea resin, a mixed resin of a polyurethane resin, and a polyamide resin. As is clear, this technology also has the drawback of causing a decrease in fluidity when used as a toner, as described above.2 The inventors of the present invention have conducted extensive studies to solve the drawbacks of the prior art. Although cross-linked resin is used for the outer wall of conventional microcapsule toners, it has been found that the degree of cross-linking is not controlled, resulting in weak mechanical strength and, in particular, a decrease in fluidity. did. That is, it was discovered that there is a certain correlation between the crosslinking strength of the outer wall and the mechanical strength of the resin [2], which led to the completion of the present invention.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a microcapsule type toner in which the degree of crosslinking of the outer wall resin can be controlled and, as a result, the mechanical strength of the resin can be adjusted to appropriate physical properties.

[Structure of the invention]

The above object of the present invention is to provide a microcapsule type toner having a core material containing a pressure fixing substance and an outer wall for covering the core material, the outer wall containing the following [A] and [B] as main components. This was achieved using a microcapsule type toner that is characterized by the following.

(A) A polyamide resin or polyester resin obtained using an acid chloride and an amine or a polyol, at least one of which is a mixture of two or more.

[8] At least one of them is 21! ! A polyurea resin or a cage polyurethane resin obtained using an isocyanate and an amine or a cage polyol consisting of the above mixture.

The present invention will be explained in detail below.

The microcapsule type toner of the present invention is composed of an outer wall and a core material. The outer wall has the above structure, and the core material contains a pressure fixing substance and a coloring agent. Note that the coloring agent may be contained in the outer wall instead of the core material, or may be contained in both the core material and the outer wall. The present invention provides a novel technical concept of controlling the degree of crosslinking of the outer wall. As a means of controlling this, a mixture of two or more compounds is used for at least one of the compounds used to obtain the outer wall resin, and as a result, the mechanical strength can be adjusted to an appropriate level. A microcapsule type toner having physical properties is formed, and fluidity, which is extremely important as a toner physical property, is improved.

The outer wall resin of the present invention basically consists of a polyamide resin or a fence polyester resin (hereinafter referred to as A resin) and a polyurea resin or a fence polyurethane resin (hereinafter referred to as 8 resin).

The A resin and the 8 resin may be a 100% copolymer, a partial copolymer, or a blend. Further, if necessary, a third resin component may be included in addition to the A resin and the B resin as a copolymer or blend.

Examples of the KM three resin components include styrene resin, acrylic resin, and styrene/acrylic resin.

The above-mentioned resin A can be obtained by a polycondensation reaction of an acid chloride and an amine or a polyol.

In the present invention, a mixture of two or more types of acid chloride and at least one of amines and polyols may be used, and a mixture of two or more types of both of them may be used. On the other hand, 8 resin can be obtained by polyaddition reaction of incyanate and amine or incyanate and polyols. In the present invention, at least one of isocyanate and amine, or at least one of isocyanate and polyols may be a mixture of 21 or more, and one or both may be a mixture of two or more of each.

The mixing ratio of A resin and B resin is A resin:B resin=l:9~9
:11, preferably 5:5 to 1:9.

Acid chlorides used in the present invention include adipoyl chloride, sebacoyl chloride, phthaloyl chloride, isophthaloyl chloride, terephthaloyl chloride, fumaroyl chloride, 1,4-cyclohexane dicarbonyl chloride, 4.4' - Trifunctional acid halides such as hyphenyldiluponyl chloride, 4,4'-sulfonyldibenzoyl chloride, nato diacid halides, and trimesoyl chloride, etc., and may be used as a mixture of two or more types. . Mixtures with trifunctional and trifunctional acid chlorides are also preferably used. The mixing ratio at this time is difunctional, ditrifunctional = 99:1 to 60
:40, preferably 99:1 to 80:20.

When the amine used in the present invention is used as a mixture of amines having more than one type, a mixture of a difunctional amine and a trifunctional or more functional amine is used.

Examples of difunctional amines include ethylenediamine, hexamethylenediamine, phenylenediamine, xylylenediamine, diaminocyclohegythane, piperazine, and 4.4'
-diaminodiphenylmethane, 4,4'-diaminodiphenyl ether, 4,4'-diaminostilbene-2,
Examples include 2'-sulfonic acid and its sodium 1 form.

Further, examples of trifunctional or higher functional amines include diethylenetriamine, triethylenetetramine, tetraethylenepentamine, iminobispropylamine, triamine/benzene, and the like.

One or more of the above amines may be arbitrarily selected and used, and other polyamines depending on the length of the molecular chain may be mixed in order to impart flexibility.

The mixing ratio of two or more types of amines is such that 1 to 50 moles of trifunctional or higher polyfunctional amines are included in the total amines.

The mixing ratio of acid chloride and amine to obtain resin A is 1
: 1 to 50 equivalents, preferably 1:1.1 to 40 equivalents.

When the incyanate used in the present invention is used as a mixture of two or more, it is a 11112-functional incyanate, and the others are tri-functional or higher-functional incyanates.

Examples of the difunctional incyanate include the following.

Below margin (1) Hexamethylene diisocyanate OCN+CH
2→τNCO +21#'Non diisocyanate Commercial product name ``naphconate'' (S7 Yonalaniline Co., Ltd. 11ri (3) Toluylene diisocyanate CO Commercial product name ``Suminate 80'' (manufactured by Sumitomo Chemical Co., Ltd.) ``Hinon TMJ (DuPont) (manufactured by Sumitomo Bayer Urethane) 151 3.3'-dimethyl-diphenyl-4,4'-
Diisocyanate commercial product name: "Hainon H" (manufactured by DuPont) "Suminate B1" (manufactured by Sumitomo Chemical Co., Ltd.) (6) Diphenylmethane-diisocyanate (manufactured by Nippon Polyurethane Industries, Ltd.) r l5or+ate 125 M J (manufactured by Kasei Upjohn Co., Ltd.) January 3,3'-dimethyl-diphenylmethane-4,4
' -Diisocyanate Commercial product name "-Ylene DMJ (manufactured by DuPont) GO GO Commercial product name "Sumidur 15" (manufactured by Sumitomo Bayer Urethane) (91 cyclohekiflumethane diisocyanate (manufactured by Sumitomo Bayer Urethane) OI diphenyl ether diisocyanate commercially available Product name: "SumiDur 44P-90" L[
Sumidur 3062J, r Sumidur ppJ, r Sumidur CDJ, r Sumidur 0ti32J, r
Sumidur PCJ (manufactured by Sumitomo Bayer Urethane)
, r Coro $-) 2014”, “Coronate APj, r Corone) 2501”, “Millionate MS-50J, r
Coronate 3041J (manufactured by Nippon Polyurethane Kogyo Co., Ltd.), "Duraney" 24A-90CXJ, r Duranate EXPD-10i (manufactured by Asahi Kasei Kogyo Co., Ltd.), "Takenate M-402J, rTakenate F-513J, rTakene) D- 102J, r Takenate L-1150J (
(manufactured by Narita Pharmaceutical Co., Ltd.) and the like, and generally any material having two isocyanate groups can be used.

As the bifunctional isocyanate used in the present invention, the above-mentioned ones may be used alone, or two or more may be used in combination.

Examples of the trifunctional in/anate include the following.

(1) Hexamethylene diisocyanate adduct 1 1 Commercial product name "Sumidur NJ (manufactured by Sumitomo Bayer Urethane) (if)) Reaction product of lylene diisocyanate and trimethylolpropane 1 Commercial product name "Sumidur LJ (Sumitomo Bayer Urethane) Bayer Urethane Co., Ltd.) Coronate LJ (Japan Polyurethane Kogyo Co., Ltd.) (
iii) ) IJ phenylmethane triisocyanate NCO Commercial product name "Sumidur R" (manufactured by Sumitomo Bayer Urethane) (lV) Reaction product of hexamethylene diisocyanate and trimethylolpropane (V) Commercially available adduct of hexamethylene diisocyanate Product name: Desmodur EHJ (manufactured by Sumitomo Bayer Urethane) (vl) Diphenylmethane diisocyanate chloroadduct CR: -@-CH2) Commercial product name r l5onate 143LJ (manufactured by Kasei Upjohn) (■11) 2-Isocyanate ethyl- 2,6-dicyanatohexanoate GO Examples of polyfunctional incyanates that exceed trifunctionality include the following.

(1) 1% Z, J, 1. ...) (11) Adduct of diphenylmethane diisocyanate and polyvalent polyol tiiD) Adduct of fluorine diisocyanate and polyvalent polyol Although these do not exist as pure products, they contain difunctional and polyfunctional ( Commercially available products containing trifunctional or higher functional compounds include the following1.
4V-20J, rsBU-Isocyanate038
9'' (manufactured by Sumitomo Bayer Urethane Co., Ltd.), [Millione] MRJ (manufactured by Nippon Polyurethane Industries Co., Ltd.), rPAP11
35J, rPAP20J (manufactured by Kasei Upjohn)
and so on.

The trifunctional or higher polyfunctional isocyanates may be used alone or in combination of two or more.

When the above-mentioned isocyanates are used as a mixture of two or more kinds of isocyanates, the mixing ratio is preferably 1 to 50 moles, more preferably 2 to 50 moles, of a trifunctional or more polyfunctional incyanate in the total incyanate. ~30 moles.

In addition to the above, aromatic isocyanates and aliphatic incyanates may be used in combination, which can contribute to improving the repellent properties.

The polyols used in the present invention include diols such as ethylene glycol, fluoropylene glycol, butylene glycol, and hexamethylene glycol, glycerin, trimethylolpropane, trimethylolethane,
1.2. When triols such as 6-hexandriol, pentaerythritol, etc. are collected and used as a mixture of 2flI or more, one of them may be a diol and the other may be a triol, etc. preferable.

As the core material constituting the microcapsule type toner of the present invention, a liquid material or a pressure fixing material such as a European solid material containing a colorant is used. , fluidity or plasticity, and viscosity [J temperature t ¥ 10 ~
One million cps is preferable. Specific examples include liquid polybutene, liquid polychloroprene, liquid polybutadiene, epoxidized soybean oil, epoxidized triglyceride, epoxidized monoester, adipic acid polyester, liquid polyester, monomerized paraffin, trimellitic acid ester, soybean oil, etc. vegetable oils, silicone oil, mineral oil, polymethyl acrylate, polybutyl acrylate, polylauryl methacrylate, acrylic ester oligomers, styrene monomer oligomers, styrene and alkyl acrylate copolymer oligomers, styrene and alkyl methacrylate copolymers Polymer oligomers, polyvinyl acetate, asphalt, petroleum residues such as kirutunide, as well as linoleic acid, linoleic acid, oleic acid, elaidic acid, eleostearic acid, linoleidic acid, gadolenic acid, erucic acid, arachidonic acid, curbanodonic acid , α−
Esters of unsaturated fatty acids such as lycanic acid, linseed oil,
Drying or semi-drying oils such as eno oil, tung oil, castor oil, hemp oil, kapok oil, poppy seed oil, sesame oil, rice bran oil, safflower oil, soybean oil, corn oil, rapeseed oil, sunflower oil, cottonseed oil, etc. Synthetic drying oils such as vegetable oils, copolymers of acetylene and butadiene, dicyclo I-pentadiene oligomers such as PUR Taiyton J (manufactured by Nippon Zeon Co., Ltd.), and others can be mentioned.

A coloring agent is contained in the core material, and in order to obtain a microcapsule toner suitable as a magnetic toner used as a -component toner, for example, fine powder of a magnetic material is used as part or all of the coloring agent. Contains h.

As a coloring agent, carbon blank, Nigron dye (
CI 1α50415B), Aniline Blue (CI Leap 50
405), Calco Oil Blue (CI Ntlazoi)
c Blue 3), Chrome Yellow (CINα14
090), Ultramarine Blue (CINI17710
3), DuPont Oil Red (CIN[L2 ti10
5), Quinolino Yellow (CIN [L47005), Methylene Blue Chloride (CINl152 (115),
Phthalone anine blue (CINa74160), malachite green offsalate (CIN (142000)N
Lamp black (CI N (17726ii), Rose Bengal (CI+ & 145435), mixtures thereof, and others. It is necessary to contain it in a proportion of 1 to 20 parts by weight per 100 parts by weight of the liquid substance, etc.

Afl: Magnetic materials include ferrite, magnetite, iron, cobalt, nickel, and other ferromagnetic metals or alloys, or compounds containing these elements, or compounds that do not contain ferromagnetic elements but are subjected to appropriate heat treatment. Alloys that exhibit ferromagnetism due to the presence of chromium dioxide, such as alloys called Heusler alloys containing manganese and copper, such as manganese-copper-aluminum and manganese-steel-tin, or chromium dioxide, can. These magnetic substances are uniformly dispersed in a liquid substance in the form of fine powder with an average particle size of 01 to 1 μm. The content thereof is 20 to 7 parts by weight, preferably 40 to 7 parts by weight, per 100 parts by weight of toner.
This is the 70th Juginbu.

The microcapsule type toner of the present invention can be suitably made into VCMa as follows, for example. That is, for example, examples of manufacturing methods preferably used in the present invention are as follows.

[1] After uniformly mixing the acid chloride and isocyanate (oil-soluble monomer), the pressure fixing substance, and the colorant, this mixture is poured into a dispersion medium of water containing an appropriate dispersion stabilizer. Disperse the mixture by stirring, etc. ! ! ! Make it cloudy (it is preferable to perform the processing up to this point at room temperature or below). Thereafter, the temperature of the yarn is raised (there are methods of raising the temperature to a high temperature and a method of raising it gradually), and the temperature is maintained at the reaction temperature to react with the acid chloride or incyanate in the water. Add the amine and/or polyol (water-soluble nitrate), allow to react, and continue stirring until the reaction is completed. Thereafter, the solids are separated and dried to produce microcapsule toner.

[2] When the pressure-fixable substance is a polymeric substance in the method [1] above, the monomer of the pressure-fixable substance and its polymerization initiator are added, and the monomer is first formed with, for example, urea or urethane resin. The material may be encapsulated with a pressure-fixable material and then polymerized to form a pressure-fixable material.

[3] When adding two types of water-soluble monomers, they may be added simultaneously or separately. For example, a trifunctional or higher polyfunctional amine may be added at the same time as or after adding a bifunctional amine.◇ In methods such as [1] to [3] above, the particle size of the toner obtained In order to control the particle size of the fine particles of the mixture in the reaction system, this can be achieved by controlling the stirring force while monitoring the particle size and dispersion degree of the fine particles using, for example, a microscope. can do.

In order to mix the coloring agent into the mixture, a ball mill, an attritor, a sand grinder, etc. may be used, but the coloring agent may be treated with a silane coupling agent, a titanium coupling agent, etc. It's good too,
Alternatively, a dispersion improver such as lecithin for dispersing inorganic substances into organic substances may be added.

As a means for dispersing the mixture of the liquid substances and the like in the dispersion medium, mechanical stirring means such as a homomixer, homojetter, Waring blender, etc., and sonic dispersion are used. It is actually necessary to add a dispersion stabilizer to the dispersion medium to maintain a stable suspension state during the polymerization reaction.

Examples of dispersion stabilizers include water mt+ = molecular substance classification substances such as gelatin, gelatin conductor, polyvinyl alcohol, polystyrene sulfonic acid, hydroxymethyl cellulose, hydroxyethyl cellulose, hydroxyglobil cellulose, sodium carboxyl methyl cellulose, and sodium polyacrylate. Ionic surfactants, nonionic surfactants, cationic surfactants, colloidal silica, alumina, tricalcium phosphate, ferric hydroxide, titanium hydroxide, aluminum hydroxide, etc. Hydrophilic inorganic colloidal substances and others can be effectively used. These dispersion stabilizers are of course 2tj17
The above may be used in combination, or an appropriate auxiliary agent or the like may be used together.

Furthermore, the particles of the microcapsule type toner according to the present invention? l
! The average particle size is usually 5 to 50 μm, preferably 5 to 30 μm, although = does not violate any additional restrictions.

Further, the thickness of the wall and the particle size of the core material may be the same as in the case of conventional microcapsule type toner.

When the microcapsule type toner of the present invention contains magnetic fine powder, it can be used alone as a developer.
In addition, when the developer does not contain magnetic fine powder, it can be mixed with a carrier to prepare a two-component developer for use.

The carrier is not particularly limited, but iron powder, glass beads, etc. or a resin wave layer of these may be used, and the toner degree in the developer consisting of the carrier and toner is 0.
．． 2 to 10 wt%, preferably 1 to 5 wt%. The particle size of the carrier used is preferably 25 to 1000/m1 and 30 to 500 m.

The toner of the present invention is easily torn by a pressure roller with a linear pressure of, for example, 10 to 30 Ky/cm, although it varies depending on the wall thickness, particle size, etc.; by configuring the roller),
The toner image created by the toner can be easily fixed onto a supporting paper, for example, a transfer paper. That is, when the capsule is ruptured, the core material sealed inside is released, but since this core material is a pressure-fixable material containing a colorant, it has sufficient visibility and Because pressure is applied to areas that have fluidity or plasticity, the pressure-fixing substance is pushed between the widths of paper such as transfer paper. captured by
As a result, the toner image is obtained without being disturbed, ie without the resolution becoming magnetic.

Blank below [Effects of the Invention] According to the present invention, since one of the monomers for obtaining the resins [A] and CB) is a mixture of two or more types, the degree of crosslinking can be freely controlled. As a result, it was possible to obtain a microcapsule type toner having suitable physical properties such as mechanical strength. In particular, the content of crosslinking components is 2
It has been found that when the degree of crosslinking is controlled to 30 mol%, the fluidity of the toner becomes extremely good.0 [Example] Examples of the present invention will be described below. The aspect is not limited. In addition"
"Parts" means parts by weight unless otherwise specified.

The toner of the present invention was mixed and dispersed uniformly with a sand grinder for about 1 hour to obtain a magnetic ink.

Separately, add 14 g of colloidal tricalcium phosphate prepared from trisodium phosphate and calcium chloride, 0.06 g of sodium dodecylbenzenesulfonate, and 800 ml of water.
Prepare a uniformly dispersed dispersion.

Next, the magnetic ink was added to this dispersion using a homojetter (manufactured by Tokushu Kika Kogyo Co., Ltd.) at a rotational speed of 8,000.
FJ5-20μm under optical microscope observation at ~9000rpm
The particles were dispersed for about 10 minutes so that the particles had a ffJ+ of 100%.

Next, the dispersion was transferred to a 2-t four-bottle flask, and an aqueous solution f' in which (C1) and (C2) were dissolved was stirred at low speed for 4W.
l 7 o rrrt was added at room temperature. Next, the temperature was gradually raised to 80'C for 7 hours to obtain 7 microcapsules having the polymer (A) as the magnetic material and the polymer and urethane polymer as the outer wall.

Next, this was cooled, 40 ml of Isojun acid was added to decompose and remove the dispersion stabilizer tricalcium phosphate, and the mixture was filtered, washed with water, and dried to obtain the microcapsule type toner of the present invention.

In the above, Ck), CF3), CC1), and (C=) are each used as substances shown in Table 4,
I got it.

Production of Toner Ugly 2 to N115 of the Present Invention In the production of Toner Ugly 1 of the present invention, two types of amine components (
Toners 1@2 to Nα5 of the present invention were prepared in the same manner except that C1) and (C2) were added separately, that is, after adding (C1), (C2) was added in the same manner as (C1). I got it.

Manufacture of Comparative Toners NQ1 and Nα2 Comparative toners N11l and Nα2 were obtained in the same manner as the toner Nal of the present invention in the production of toner NQI of the present invention using the substances shown in Table 1.

[Experiment example]

The fluidity was measured for each of the toners of the present invention NCII-5 and comparative toners Mal and 2 obtained as described above. As an evaluation method, the following quietness density tW method was used. This method is one way to evaluate liquidity.
This is a simple method for evaluating end-of-line injection in yarns that do not have a large difference in density, such as heathered yarns, and the larger the value, the better the fluidity.

(Measurement method) In fact, in an acid chamber, place a cone-shaped funnel on top of a 20-meter graduated cylinder, and gently drop the microcapsule-type toner from above through a 10 meso/yu sieve. Measure the weight of toner 20m/1ilI
Calculated the umbilicus.

(Ql Determination Results) The results are as shown in 1iF-1, and it can be seen that the toner of the present invention has good fluidity.

toner liqueur

Claims (1)

[Scope of Claims] A microcapsule type toner having a core material containing a pressure fixing substance and an outer wall for covering the core material,
Fl, 1. A microcapsule type toner characterized in that the n-wall contains the following [A] and [B] as main components. (A) A polyamide resin or polyester resin obtained using an acid chloride and an amine or a polyol, at least one of which is a mixture of two or more. [B) A polyurea resin or polyurethane resin obtained using incyanate and amine or polyols, at least one of which is a mixture of two or more types.