CN110331619A - A kind of coal ash fiber is used to substitute the enhancing modified technique of part waste paper - Google Patents
A kind of coal ash fiber is used to substitute the enhancing modified technique of part waste paper Download PDFInfo
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- CN110331619A CN110331619A CN201910527197.7A CN201910527197A CN110331619A CN 110331619 A CN110331619 A CN 110331619A CN 201910527197 A CN201910527197 A CN 201910527197A CN 110331619 A CN110331619 A CN 110331619A
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- Prior art keywords
- coal ash
- ash fiber
- waste paper
- substitute
- enhancing modified
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H13/00—Pulp or paper, comprising synthetic cellulose or non-cellulose fibres or web-forming material
- D21H13/36—Inorganic fibres or flakes
- D21H13/38—Inorganic fibres or flakes siliceous
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention discloses the enhancing modified techniques that a kind of coal ash fiber is used to substitute part waste paper, at least to contain a primary amine, secondary amine or the coupling agent of tertiary amine functional group and surface of fly ash fiber are coupled, then ring-opening reaction is carried out with the amide resin containing epoxy group, by containing coupling agent modified coal ash fiber bifunctional, with a wherein functional group in conjunction with flyash, with the epoxy group in functional group's open loop amide resin containing groups such as primary amine with by amide resin and coal ash fiber stable bond, and the groups such as hydroxyl formed after its open loop help the dispersibility for improving coal ash fiber in pulping process, to guarantee to be uniformly dispersed in page, it is during other fiber mixed pulps simultaneously, the amino having in amide resin molecule, carbonyl isopolarity group is easily bonded with other fibers, improve bond strength, it is higher to assign page Wet strength.
Description
Technical field
The present invention relates to the enhancing modified techniques that a kind of coal ash fiber is used to substitute part waste paper.
Background technique
In China, there are about 500,000,000 tons of flyash to come from coal-fired power plant every year, and flyash is mainly used as southern china coagulation
The additive of soil and cement, only accounts for the 20%-30% of whole quantum of output, under flyash utilization rate is very low at present, most of powder
Coal ash is effectively utilized not yet, causes serious economy and environmental problem, and flyash effective use has become state
The problem of border property.And waste paper and papermaking wood-fibred resource are more in short supply at this stage, therefore flyash and coal ash fiber are used
It in papermaking, had not only saved papermaking cost but also had been conducive to environmental protection, anticipated to the problems such as environmental pollution, the wasting of resources are solved
Justice is great.
Coal ash fiber is to be aided with calcium oxide etc. using flyash, this kind of industrial solid castoff of the skilful stone of coal as primary raw material
Blocky mixed raw material is made in ingredient, then melted, get rid of at high temperature/processes such as spinneret, cooling are made.
The production of coal ash fiber is broadly divided into 3 stages: fiber forming process, fiber collect process, product fiber slurrying
Journey, as shown in Figure 1.
At present both at home and abroad for coal ash fiber research and produce and for paper industry it is still at an early stage, because of work
The inorfil raw cotton of industry production is primarily present the disadvantages of brittleness is big, fiber is short, ball slag is more, exists when being applied to paper-making industry
The paper surface being copied into inorfil is rougher, easily loses powder, and flexibility is poor, crisp, and the wet strength of paper is low, needs to improve.
Summary of the invention
In view of this, the object of the present invention is to provide the enhancing that a kind of coal ash fiber is used to substitute part waste paper is modified
Technique, it is at least one of above-mentioned to solve the problems, such as.
In order to solve the above technical problems, the technical scheme is that
A kind of coal ash fiber is used to substitute the enhancing modified technique of part waste paper, at least to contain a primary amine, secondary amine or uncle
The coupling agent and surface of fly ash fiber of amine functional group are coupled, and then carry out ring-opening reaction with the amide resin containing epoxy group.
By containing coupling agent modified coal ash fiber bifunctional, with a wherein functional group in conjunction with flyash, to contain
Epoxy group in functional group's open loop amide resin of the groups such as primary amine with by amide resin and coal ash fiber stable bond,
And the groups such as hydroxyl formed after its open loop help the dispersibility for improving coal ash fiber in pulping process, to guarantee in paper
It is uniformly dispersed, while being during other fiber mixed pulps, amino, carbonyl for having in amide resin molecule etc. in page
Polar group is easily bonded with other fibers, improves bond strength, assigns the higher wet strength of page.
Further, coupling agent is one of silane coupling agent, titanate coupling agent or a variety of.
Further, silane coupling agent is gamma-aminopropyl-triethoxy-silane, more preferably, the usage amount of silane coupling agent with
The ratio of coal ash fiber oven dry weight is between 0.9%-1.1%.
Certainly the silane that other amino-containeds also can be selected, such as N-(β aminoethyl)-γ-aminopropyltriethoxy dimethoxysilane
Deng.
Further, the amide resin containing epoxy group is polyamine epichlorohydrin resin.
More preferably, polyamine epichlorohydrin resin and coal ash fiber oven dry weight ratio are between 40%-50%.
Further, the enhancing modified technique of coal ash fiber further includes cross-linking reaction, the synthesis of technique described in claim 1
Product and crosslinking agent carry out cross-linking reaction.
Further, crosslinking agent is watersoluble closed type isocyanate crosslinking, and such as KL-120 passes through isocyanates (- NCO)
Group is reacted with groups such as hydroxyl, amidos on molecular resin chain, forms cross-linked structure, and different fiber chains are combined and are formed
Reticular structure further increases paper strength with after other fiber mixed pulp copy papers.
More preferably, the usage amount of crosslinking agent accounts between the 10%-20% of coal ash fiber oven dry weight.
Further, the enhancing modified technique of coal ash fiber further includes that adjuvant is sprayed on the product formed after cross-linking.
Further, adjuvant is one or more in antistatic agent, interfacial agent or pH regulator.
For example, successively spraying interfacial agent, antistatic agent and pH regulator, median surface during spraying adjuvant
Activating agent, preferred cationic interfacial agent, such as dodecyl trimethyl ammonium chloride cationic quaternary ammonium type surfactant,
Dosage accounts for the 0.5%-0.8% of coal ash fiber oven dry weight；Antistatic agent, preferably the borate alkylamine of ethoxylation are anti-
Electrostatic agent, dosage account for the 0.4%-0.6% of coal ash fiber oven dry weight；PH regulator, is adjusted to neutrality, such as hydrogen-oxygen
Change sodium etc..
In addition lubricant can also be added in spraying process, for example, successively spraying interface during spraying adjuvant
Activating agent, antistatic agent, lubricant and pH regulator, wherein the preferred water-based zinc stearate of lubricant, it is exhausted that dosage accounts for flyash
Between the 1%-1.5% of dry weight.
The coal ash fiber of this process modification carries out papermaking test, and technique is as follows:
The coal ash fiber being modified is mixed with waste paper and carries out handsheet test, is beaten after mixing with Valley beater
Slurry, then with full-automatic paper industry former copy paper, constant temperature and humidity for 24 hours, tests the physical index of paper, and replace with nothing after drying
The blank group in generation compares, as the result is shown: the mass ratio maximum of coal ash fiber and waste paper is no more than 55%, that is, indicates this
Modified coal ash fiber can substitute the waste paper less than 55% and carry out papermaking, the ring pressure of the copy paper within this mass ratio, resistance to
Broken and wet strength etc. significantly improves.
And this technique preferably uses the scheme of mesh belt spray drying, such as by flyash to the modified technique of coal ash fiber
Fiber is laid on mesh belt, and conveyer belt passes through multiple baking ovens, constantly downward from top in conveyer belt moving process
Spray reagent, such as spray coupling agent-drying-spray amide resin-drying-spray crosslinking agent-drying-spray adjuvant, dry or
Drying, it is simple for process, it is suitble to industrialization, scale uses.
Specific embodiment
With reference to embodiments, a specific embodiment of the invention is described in further detail, so that technical solution of the present invention
It is more readily understood and grasps.
Embodiment 1
It takes a certain amount of coal ash fiber to be uniformly layered on mesh belt, takes coal ash fiber oven dry weight 1%
Gamma-aminopropyl-triethoxy-silane is diluted to 1% aqueous solution, by the spray head even application above conveyer belt in flyash fibre
Dimension table face is then transported on band and enters 100 DEG C of baking oven drying；After drying, after natural cooling, as conveyer belt continues to move ahead, separately
One spray head even application polyamine epichlorohydrin resin, dosage is the 50% of coal ash fiber dry weight, into 100 DEG C of baking ovens
Drying；After drying, natural cooling, then the watersoluble closed type isocyanate crosslinking of even application, dosage are dry for coal ash fiber
The 20% of weight is dried subsequently into 100 DEG C of baking ovens；After drying, natural cooling, then even application cationic quaternary ammonium type surface
Activating agent, dosage are the 0.8% of coal ash fiber dry weight, are dried subsequently into 100 DEG C of baking ovens；After natural cooling, in room temperature feelings
Even application accounts for the antistatic agent tristearin phthalein amine of coal ash fiber oven dry weight 0.6% under condition；After drying, then sprays and account for fine coal
The lubricant water-based zinc stearate of gray fibers oven dry weight 1.5%, after drying, finally spray a small amount of PH regulator NaOH or
Hc l, adjusts neutral or alkalinity etc., and naturally dry after spraying is modified to complete.
Embodiment 2
It takes a certain amount of coal ash fiber to be uniformly layered on mesh belt, takes coal ash fiber oven dry weight 0.9%
Gamma-aminopropyl-triethoxy-silane is diluted to 1% aqueous solution, by the spray head even application above conveyer belt in flyash fibre
Dimension table face is then transported on band and enters 100 DEG C of baking oven drying；After drying, after natural cooling, as conveyer belt continues to move ahead, separately
One spray head even application polyamine epichlorohydrin resin, dosage is the 40% of coal ash fiber dry weight, into 100 DEG C of baking ovens
Drying；After drying, natural cooling, then the watersoluble closed type isocyanate crosslinking of even application, dosage are dry for coal ash fiber
The 10% of weight is dried subsequently into 100 DEG C of baking ovens；After drying, natural cooling, then even application cationic quaternary ammonium type surface
Activating agent, dosage are the 0.5% of coal ash fiber dry weight, are dried subsequently into 100 DEG C of baking ovens；After natural cooling, in room temperature feelings
Even application accounts for the antistatic agent tristearin phthalein amine of coal ash fiber oven dry weight 0.4% under condition；After drying, then sprays and account for fine coal
The lubricant water-based zinc stearate of gray fibers oven dry weight 1% after drying, finally sprays a small amount of PH regulator NaOH or Hc
L, adjusts neutral or alkalinity etc., and naturally dry after spraying is modified to complete.
Embodiment 3
It takes a certain amount of coal ash fiber to be uniformly layered on mesh belt, takes coal ash fiber oven dry weight 1.1%
Gamma-aminopropyl-triethoxy-silane is diluted to 1% aqueous solution, by the spray head even application above conveyer belt in flyash fibre
Dimension table face is then transported on band and enters 100 DEG C of baking oven drying；After drying, after natural cooling, as conveyer belt continues to move ahead, separately
One spray head even application polyamine epichlorohydrin resin, dosage is the 45% of coal ash fiber dry weight, into 100 DEG C of baking ovens
Drying；After drying, natural cooling, then the watersoluble closed type isocyanate crosslinking of even application, dosage are dry for coal ash fiber
The 15% of weight is dried subsequently into 100 DEG C of baking ovens；After drying, natural cooling, then even application cationic quaternary ammonium type surface
Activating agent, dosage are the 0.6% of coal ash fiber dry weight, are dried subsequently into 100 DEG C of baking ovens；After natural cooling, in room temperature feelings
Even application accounts for the antistatic agent tristearin phthalein amine of coal ash fiber oven dry weight 0.5% under condition；After drying, then sprays and account for fine coal
The lubricant water-based zinc stearate of gray fibers oven dry weight 1.2%, after drying, finally spray a small amount of PH regulator NaOH or
Hc l, adjusts neutral or alkalinity etc., and naturally dry after spraying is modified to complete.
Embodiment 4
It takes a certain amount of coal ash fiber to be uniformly layered on mesh belt, takes coal ash fiber oven dry weight 0.95%
Gamma-aminopropyl-triethoxy-silane, 1% aqueous solution is diluted to, by the spray head even application above conveyer belt in flyash
Fiber surface is then transported on band and enters 100 DEG C of baking oven drying；After drying, after natural cooling, as conveyer belt continues to move ahead,
Another spray head even application polyamine epichlorohydrin resin, dosage are the 47% of coal ash fiber dry weight, are dried into 100 DEG C
Case drying；After drying, natural cooling, then the watersoluble closed type isocyanate crosslinking of even application, dosage is coal ash fiber
The 13% of dry weight is dried subsequently into 100 DEG C of baking ovens；After drying, natural cooling, then even application cationic quaternary ammonium type table
Face activating agent, dosage are the 0.6% of coal ash fiber dry weight, are dried subsequently into 100 DEG C of baking ovens；After natural cooling, in room temperature
In the case of even application account for the antistatic agent tristearin phthalein amine of coal ash fiber oven dry weight 0.52%；After drying, then sprays and account for
The lubricant water-based zinc stearate of coal ash fiber oven dry weight 2% after drying, finally sprays a small amount of PH regulator NaOH
Or Hc l, neutral or alkalinity etc. is adjusted, naturally dry after spraying is modified to complete.
Then the modified coal ash fiber prepared in above-described embodiment is mixed with the waste paper of different quality ratio and carries out copy paper
Test, technique are as follows:
Modified coal ash fiber is mixed with waste paper by different quality ratio, is beaten with Valley beater, with full-automatic
Paper industry former handsheet, after drying constant temperature and humidity for 24 hours after, detect the physical property of paper, and and the pure waste paper handsheet without substitution
It compares, as shown in the table:
Table 1: modified coal ash fiber is 5:95 with waste paper mass ratio
Table 2: modified coal ash fiber is 25:75 with waste paper mass ratio
Table 3: modified coal ash fiber is 45:55 with waste paper mass ratio
Can be found by above table: with the increase of modified coal ash fibre weight, the papermaking properties presentation produced first increases
The trend dropped afterwards, the papermaking properties of mixed and modified coal ash fiber compare the copy paper of pure waste paper preparation, the wet strength of paper, ring
Pressure index and burst index significantly improve, and the modified coal ash fiber of the preparation of embodiment 4 participates in the performance of the paper of preparation
Higher than the performance that the coal ash fiber of embodiment 1, embodiment 2 and embodiment 3 preparation participates in the paper prepared.
Certainly, the above is only specific application example of the invention, protection scope of the present invention is not limited in any way.
Any technical scheme formed by adopting equivalent transformation or equivalent replacement, all falls within rights protection scope of the present invention.
Claims (8)
1. a kind of coal ash fiber is used to substitute the enhancing modified technique of part waste paper, it is characterised in that: at least contain a primary amine,
Secondary amine or the coupling agent of tertiary amine functional group and surface of fly ash fiber are coupled, and are then opened with the amide resin containing epoxy group
Ring reaction.
2. a kind of coal ash fiber according to claim 1 is used to substitute the enhancing modified technique of part waste paper, feature
It is, coupling agent is one of silane coupling agent, titanate coupling agent or a variety of.
3. a kind of coal ash fiber according to claim 2 is used to substitute the enhancing modified technique of part waste paper, feature
It is, silane coupling agent is gamma-aminopropyl-triethoxy-silane.
4. a kind of coal ash fiber according to claim 1 is used to substitute the enhancing modified technique of part waste paper, feature
It is, the amide resin containing epoxy group is polyamine epichlorohydrin resin.
5. a kind of coal ash fiber according to claim 1 is used to substitute the enhancing modified technique of part waste paper, feature
It is, the enhancing modified technique of coal ash fiber further includes cross-linking reaction, the product of the synthesis of technique described in claim 1 and crosslinking
Agent carries out cross-linking reaction.
6. a kind of coal ash fiber according to claim 5 is used to substitute the enhancing modified technique of part waste paper, feature
It is, crosslinking agent is watersoluble closed type isocyanate crosslinking.
7. a kind of coal ash fiber according to claim 6 is used to substitute the enhancing modified technique of part waste paper, feature
It is, the enhancing modified technique of coal ash fiber further includes that adjuvant is sprayed on the product formed after cross-linking.
8. a kind of coal ash fiber according to claim 7 is used to substitute the enhancing modified technique of part waste paper, feature
It is, adjuvant is one or more in antistatic agent, interfacial agent or pH regulator.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910527197.7A CN110331619A (en) | 2019-06-18 | 2019-06-18 | A kind of coal ash fiber is used to substitute the enhancing modified technique of part waste paper |
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| CN201910527197.7A CN110331619A (en) | 2019-06-18 | 2019-06-18 | A kind of coal ash fiber is used to substitute the enhancing modified technique of part waste paper |
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Application publication date: 20191015 |