CN109338813B - ITO conductive glass finished product packaging cover plate paper and preparation method thereof - Google Patents
ITO conductive glass finished product packaging cover plate paper and preparation method thereof Download PDFInfo
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- CN109338813B CN109338813B CN201811196607.6A CN201811196607A CN109338813B CN 109338813 B CN109338813 B CN 109338813B CN 201811196607 A CN201811196607 A CN 201811196607A CN 109338813 B CN109338813 B CN 109338813B
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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
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/10—Packing paper
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/02—Methods of beating; Beaters of the Hollander type
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D1/00—Methods of beating or refining; Beaters of the Hollander type
- D21D1/20—Methods of refining
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21D—TREATMENT OF THE MATERIALS BEFORE PASSING TO THE PAPER-MAKING MACHINE
- D21D5/00—Purification of the pulp suspension by mechanical means; Apparatus therefor
- D21D5/18—Purification of the pulp suspension by mechanical means; Apparatus therefor with the aid of centrifugal force
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
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Abstract
The invention discloses ITO conductive glass finished product packaging cover plate paper and a preparation method thereof, and belongs to the technical field of packaging cover plate paper. The packaging cover board paper is processed by taking chemical fibers and plant fibers as main raw materials, wherein the chemical fibers account for 5-15% by mass, and the plant fibers account for 85-95% by mass; the preparation method of the packaging cover board paper comprises the steps of raw material weighing, pulping, plant fiber purification, pulp mixing, paper making, drying, forming and the like, wherein a multistage impurity removal and purification process is adopted in the plant fiber purification step, so that the purity of raw material slurry can be effectively ensured, the quality of a finished product of the packaging cover board paper is improved, the hot melt of the finished product in a high-temperature and high-humidity environment is within 0.4-0.6%, the ash content is within 0.8-1.2%, the paper smoothness is good, the tensile strength is high, and precipitates in the material can be effectively prevented from polluting ITO conductive glass, so that the product yield of an LCD manufacturer can be improved, and the problem of rework is avoided.
Description
Technical Field
The invention belongs to the technical field of packaging cover plate paper, and particularly relates to ITO conductive glass finished product packaging cover plate paper and a preparation method thereof.
Background
In the packaging process of the conventional ITO conductive glass finished product (20 sheets/bag), a protective material is required to be used at the uppermost surface and the lowermost surface of each bag of glass, so that the quality of the upper and lower ITO conductive glass products is not influenced. At present, no material in the market is specially used for packaging upper and lower cover plates of ITO conductive glass, and ITO manufacturers select white paperboard or double-sided offset paper for use at present, but because the two products have certain pollution, LCD manufacturers often complain of the problem that the yield of upper and lower ITO conductive glass sheets of each product of the ITO manufacturers is not high. Therefore, ITO manufacturers urgently need to solve the problems that the yield of the topmost and bottommost glass products is not high and the rework amount is large in the process of packaging the ITO conductive glass finished products.
Through retrieval, Chinese patent, application number: 201510042965.1, publication date: 2015.05.20, discloses a fine seeding paper for agriculture and a preparation method thereof, which belongs to the technical field of special paper and preparation method thereof, and comprises fiber raw materials and auxiliary materials; according to the weight percentage, the fiber raw material consists of 60 to 80 percent of plant fiber and 40 to 20 percent of chemical fiber; the auxiliary materials comprise a dispersing agent and a reinforcing agent; according to the parts by weight, the fiber raw materials: dispersing agent: the reinforcing agent is 100: 1-3: 2-5. Dispersing by a dispersing agent, reinforcing by a reinforcing agent, and preparing by a wet forming process of an inclined wire paper machine. The agricultural paper has the characteristics of low quantification, good uniformity, good air permeability and the like, and the paper after bag making has high emergence rate and high decomposition speed through a seeding test, thereby meeting the use requirement. However, the fine seeding paper prepared by the invention has high impurity content and can not be used as a packaging material of ITO conductive glass finished products.
Disclosure of Invention
Technical problem to be solved by the invention
Aiming at the problem that packaging materials in the prior art can pollute ITO conductive glass finished products, the invention provides ITO conductive glass finished product packaging cover plate paper and a preparation method thereof, wherein chemical fibers and plant fibers are used as raw materials, and are prepared into raw material slurry through multi-stage purification technology, so that hot melt of the finished products in high-temperature and high-humidity environments is ensured to be within 0.4% -0.6%, ash content is within 0.8% -1.2%, and precipitates in the materials can be effectively prevented from polluting ITO conductive glass, so that the product yield of LCD manufacturers can be improved, and the problem of rework is avoided.
Technical scheme
In order to solve the problems, the technical scheme provided by the invention is as follows:
the packaging cover board paper for the ITO conductive glass finished product is obtained by processing chemical fibers and plant fibers serving as main raw materials, wherein the chemical fibers account for 5-15% by mass, and the plant fibers account for 85-95% by mass, so that the packaging cover board paper is easier to degrade and avoids environmental pollution under the condition of ensuring the strength of the finished product packaging cover board paper; the chemical fiber can be regenerated fiber or synthetic fiber, or the mixture of the regenerated fiber and the synthetic fiber; the plant fiber is formed by mixing needle leaf fiber and broad leaf fiber.
Preferably, the chemical fiber is polypropylene fiber, and can also be polyester fiber or a mixture of the two.
Preferably, the plant fiber comprises at least one of refined modified cotton fiber and pinus tabulaeformis fiber and eucalyptus fiber.
Preferably, the mass percentage of the eucalyptus fibers in the main raw material of the cover plate paper is 50-60%; eucalyptus fibre and essence
Compared with chemical fiber, the modified cotton fiber and the pinus sylvestris fiber have shorter fiber length, so that the finished product packaging cover plate
The paper is easy to degrade and is more environment-friendly; however, if the eucalyptus fiber content is too high, it will result in a decrease in the strength of the finished paper.
A preparation method of ITO conductive glass finished product packaging cover plate paper comprises the following steps:
step one, weighing raw materials: weighing chemical fibers and plant fibers according to the mass percentage;
step two, pulping and purifying plant fibers:
A. pulping: adding water into the blocky plant fibers and crushing the blocky plant fibers to prepare liquid primary slurry, wherein the concentration of the primary slurry is 6-8%; the pulping process is carried out in a pulping machine, after pulping, fiber bundles in the raw materials are dissociated, the specific surface area of the fibers is increased, the flexibility and the plasticity are improved, and the opportunity of fiber interweaving and combining is increased, so that the uniformity and the strength of finished paper are improved, and fluffing is prevented;
B. oil removal: steam heating and stirring the primary slurry to promote separation of impurities such as grease, and the like, in particular to promote separation of impurities such as grease, inorganic salt, oxide and the like contained in the plant fiber;
C. and (3) filtering: then the primary slurry is placed into an arc sieve for filtering to obtain solid plant fiber, and the aim is to separate the plant fiber from water, and discharge impurities such as grease, inorganic salt, oxide and the like along with the water;
D. diluting: adding water into the solid plant fiber, and adjusting the concentration of the liquid slurry of the plant fiber to prepare secondary slurry, aiming at promoting the dissolution and separation of impurities by dilution, wherein the concentration of the secondary slurry is 4-6%;
E. deslagging: removing heavy and light impurities in the secondary slurry by using a slag remover, so as to remove impurities with a specific gravity larger than that of the plant fibers in the slurry;
F. grinding: grinding the secondary slurry, optimizing the beating degree and the silk weight of the secondary slurry, and further promoting the separation of impurities with large specific gravity and iron element components in the plant fiber;
G. iron removal: the liquid magnet iron remover is used for removing iron from the secondary slurry, namely, iron elements are adsorbed to the surface of the magnet by using a strong magnetic field in the iron remover, so that the purpose of removing the iron elements in the secondary slurry is achieved;
H. and (3) secondary dilution: the concentration of the secondary slurry is adjusted by a concentration adjusting instrument to be about 2 percent, so that the concentration of the secondary slurry is uniform and constant, and the further separation of impurities with large specific gravity is promoted;
I. secondary deslagging: removing heavy and light impurities remained in the secondary slurry by using a slag remover, and further removing impurities with a specific gravity larger than that of the plant fibers in the slurry;
J. screening and separating: screening and separating the secondary slurry by using a pressure screen, and further screening, separating and removing impurities from the raw material by using a centrifugal principle;
K. and (3) secondary iron removal: removing residual iron element in the secondary slurry by using a liquid magnet iron remover to further remove the iron element in the secondary slurry, and preparing pure plant fiber slurry;
step three, pulping by chemical fibers: adding water into chemical fiber and crushing to prepare chemical fiber slurry, wherein the concentration of the chemical fiber slurry is 6-8%;
step four, slurry preparation: mixing the pure plant fiber slurry and the chemical fiber slurry, and adjusting the concentration to prepare raw material slurry, wherein the concentration of the raw material slurry is about 2%;
and step five, preparing the raw material slurry into a finished product of the packaging cover board paper by papermaking, drying and forming in sequence.
Preferably, when the plant fiber is pulped and purified, the eucalyptus fiber, the refined modified cotton fiber and the pinus sylvestris fiber are pulped and purified respectively, wherein the beating degree of the eucalyptus fiber after pulping in the step A is 17-19 DEG SR, and the beating degree after pulping in the step F is 20-25 DEG SR; and (3) pulping the refined modified cotton fibers and the pinus sylvestris fibers in the step A to obtain a pulp degree of 20-25 DEG SR, and pulping in the step F to obtain a pulp degree of 28-34 DEG SR.
Preferably, the water used in the steps of pulping and purifying the plant fibers is purified water obtained by filtering quartz sand, activated carbon and a 10-micron filter element in sequence, so as to avoid impurities such as impurities, grease, metal elements and the like from being brought into the slurry to pollute the slurry.
Preferably, the magnetic field intensity in the liquid magnet iron remover is required to be over 1200 gauss so as to ensure the best iron element removing effect.
Preferably, the equipment used in the preparation step is completely made of 304 stainless steel or 306 stainless steel at the contact part with the slurry, so that the pollution to the slurry is avoided.
Preferably, the concentration of the raw material slurry is 1.8% -2.5%.
Advantageous effects
Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:
(1) according to the ITO conductive glass finished product packaging cover plate paper provided by the invention, the hot melt of the finished product in a high-temperature and high-humidity environment is within 0.4% -0.6%, the ash content is within 0.8% -1.2%, the paper smoothness is good, and precipitates in the material can be effectively prevented from polluting ITO conductive glass, so that the product yield of an LCD manufacturer can be improved, and the problem of rework is avoided; the tensile strength is high and the durability is high;
(2) the ITO conductive glass finished product packaging cover plate paper provided by the invention is made of common chemical fibers and plant fibers, is easy to degrade, can ensure enough strength, and is environment-friendly, high in quality and low in cost;
(3) according to the preparation method of the ITO conductive glass finished product packaging cover plate paper, the plant fiber is treated by adopting the multi-stage impurity removal process, so that impurities such as grease, inorganic matters, impurities with large specific gravity, iron elements and the like in the plant fiber can be effectively removed, and the quality of a finished product is improved;
(4) according to the preparation method of the ITO conductive glass finished product packaging cover plate paper, when plant fiber pulping and purification are carried out, grease, slag and iron elements are sequentially removed according to steps, the situation that the slag and the iron elements are remained in the grease and cannot be removed completely can be avoided, the times of removing slag and iron are reduced, and the efficiency of removing slag and iron is improved;
(5) according to the preparation method of the ITO conductive glass finished product packaging cover plate paper, water used in the preparation process is subjected to triple filtration of quartz sand, activated carbon and a 10-micrometer filter element, so that impurities can be effectively prevented from being mixed, and the quality of a finished product is improved;
(6) according to the preparation method of the ITO conductive glass finished product packaging cover plate paper, all the contact parts of the equipment used in the preparation process and the slurry are made of 304 stainless steel or 306 stainless steel, so that the pollution to the slurry is further avoided, and the quality of the finished product is improved.
Detailed Description
For a further understanding of the present invention, reference will now be made to the following examples which are provided to illustrate the invention.
Example 1
The packaging cover board paper for the ITO conductive glass finished product is obtained by processing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers serving as main raw materials, wherein the polypropylene fibers account for 5%, the refined modified cotton fibers account for 45% and the eucalyptus fibers account for 50%. The preparation method comprises the following steps:
step one, weighing raw materials: weighing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers according to the mass percentage;
step two, pulping and purifying the refined modified cotton fiber and the eucalyptus fiber respectively, and comprising the following steps:
A. pulping: adding water into the blocky plant fibers and crushing the blocky plant fibers to prepare liquid primary slurry, wherein the concentration of the primary slurry is 6%; wherein the beating degree of the primary pulp of the refined modified cotton fiber is 20 DEG SR, and the beating degree of the primary pulp of the eucalyptus fiber is 17 DEG SR;
B. oil removal: steam heating and stirring the primary slurry to precipitate impurities such as grease, inorganic salt and oxide contained in the plant fiber;
C. and (3) filtering: then the primary slurry is placed into an arc sieve for filtering to obtain solid plant fiber, and the aim is to separate the plant fiber from water, and discharge impurities such as grease, inorganic salt, oxide and the like along with the water;
D. diluting: adding water into the solid plant fiber, and adjusting the concentration of the liquid slurry of the plant fiber to prepare a secondary slurry, wherein the concentration of the secondary slurry is 4%;
E. deslagging: removing heavy and light impurities in the secondary slurry by using a slag remover, so as to remove impurities with a specific gravity larger than that of the plant fibers in the slurry;
F. grinding: grinding the secondary slurry, optimizing the beating degree and the silk weight of the secondary slurry, and further promoting the separation of impurities with large specific gravity and iron element components in the plant fibers, wherein the beating degree of the refined modified cotton fiber secondary slurry is 28 DEG SR, and the beating degree of the eucalyptus fiber secondary slurry is 20 DEG SR;
G. iron removal: the liquid magnet iron remover is used for removing iron from the secondary slurry, namely, iron elements are adsorbed to the surface of the magnet by using a strong magnetic field in the iron remover, so that the purpose of removing the iron elements in the secondary slurry is achieved;
H. and (3) secondary dilution: adjusting the concentration of the secondary slurry to 2% by using a concentration regulator, and promoting further separation of impurities with large specific gravity;
I. secondary deslagging: removing heavy and light impurities remained in the secondary slurry by using a slag remover, and further removing impurities with a specific gravity larger than that of the plant fibers in the slurry;
J. screening and separating: screening and separating the secondary slurry by using a pressure screen, and further screening, separating and removing impurities from the raw material by using a centrifugal principle;
K. and (3) secondary iron removal: removing residual iron elements in the secondary slurry by using a liquid magnet iron remover, namely adsorbing the iron elements to the surface of a magnet by using a strong magnetic field in the iron remover to further remove the iron elements in the secondary slurry, and preparing pure plant fiber slurry;
step three, pulping by chemical fibers: adding water into polypropylene fibers, and crushing to prepare chemical fiber slurry, wherein the concentration of the chemical fiber slurry is 6%;
step four, slurry preparation: mixing the pure plant fiber slurry and the chemical fiber slurry, and adjusting the concentration to prepare raw material slurry, wherein the concentration of the raw material slurry is 1.8%; in the embodiment, the pure plant fiber slurry comprises pure refined modified cotton fiber slurry and pure eucalyptus fiber slurry;
and step five, preparing the raw material slurry into a finished product of the packaging cover board paper by papermaking, drying and forming in sequence.
In the preparation method, the water used in the steps of pulping and purifying the plant fiber is purified water obtained by filtering quartz sand, activated carbon and a 10-micron filter element in sequence; the magnetic field intensity in the liquid magnet iron remover is required to be more than 1200 gauss; the contact part of the equipment and the slurry used in the preparation step is made of 304 stainless steel or 306 stainless steel.
According to the preparation method of the ITO conductive glass finished product packaging cover plate paper, the process steps of pulping → oil removal → filtration → dilution → deslagging → pulping → iron removal → secondary dilution → secondary deslagging → screening separation → secondary iron removal and the like are sequentially carried out to remove grease, inorganic impurities, iron elements and the like in the plant fibers, the prepared plant fiber slurry is high in cleanliness, the grease is removed firstly, and the impurities such as the inorganic impurities and the iron elements are attached to the grease and cannot be removed completely when the subsequent impurity removal is avoided; therefore, the prepared ITO conductive glass finished product packaging cover plate paper has 0.4% of hot melt in a high-temperature and high-humidity environment, 1.2% of ash content and high cleanliness; tensile strength: longitudinal direction is 2.5KN/m, and transverse direction is 1.2 KN/m; paper smoothness: longitudinal 25s, transverse 15 s; the ITO conductive glass can be effectively prevented from being polluted by precipitates in the material, so that the product yield of an LCD manufacturer can be improved, the problem of rework is avoided, and meanwhile, the cost can be effectively reduced due to the fact that raw materials are easy to obtain; in addition, the product can be degraded by adding water and stirring, and is very environment-friendly.
Example 2
The packaging cover board paper for the ITO conductive glass finished product is different from and improved by embodiment 1 in that the packaging cover board paper is obtained by processing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers serving as main raw materials, wherein the content of the polypropylene fibers is 10%, the content of the refined modified cotton fibers is 40% and the content of the eucalyptus fibers is 50%. The preparation method comprises the following steps:
step one, weighing raw materials: weighing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers according to the mass percentage;
step two, pulping and purifying the refined modified cotton fiber and the eucalyptus fiber respectively, and comprising the following steps:
A. pulping: adding water into the blocky plant fibers and crushing the blocky plant fibers to prepare liquid primary slurry, wherein the concentration of the primary slurry is 7%; wherein the beating degree of the primary pulp of the refined modified cotton fiber is 23 degrees SR, and the beating degree of the primary pulp of the eucalyptus fiber is 18 degrees SR;
B. oil removal: steam heating and stirring the primary slurry to precipitate impurities such as grease, inorganic salt and oxide contained in the plant fiber;
C. and (3) filtering: then the primary slurry is placed into an arc sieve for filtering to obtain solid plant fiber, and the aim is to separate the plant fiber from water, and discharge impurities such as grease, inorganic salt, oxide and the like along with the water;
D. diluting: adding water into the solid plant fiber, and adjusting the concentration of the liquid slurry of the plant fiber to prepare secondary slurry, wherein the concentration of the secondary slurry is 5%;
E. deslagging: removing heavy and light impurities in the secondary slurry by using a slag remover, so as to remove impurities with a specific gravity larger than that of the plant fibers in the slurry;
F. grinding: grinding the secondary slurry, optimizing the beating degree and the silk weight of the secondary slurry, and further promoting the separation of impurities with large specific gravity and iron element components in the plant fibers, wherein the beating degree of the refined modified cotton fiber secondary slurry is 30 DEG SR, and the beating degree of the eucalyptus fiber secondary slurry is 23 DEG SR;
G. iron removal: the liquid magnet iron remover is used for removing iron from the secondary slurry, namely, iron elements are adsorbed to the surface of the magnet by using a strong magnetic field in the iron remover, so that the purpose of removing the iron elements in the secondary slurry is achieved;
H. and (3) secondary dilution: adjusting the concentration of the secondary slurry to 2% by using a concentration regulator, and promoting further separation of impurities with large specific gravity;
I. secondary deslagging: removing heavy and light impurities remained in the secondary slurry by using a slag remover, and further removing impurities with a specific gravity larger than that of the plant fibers in the slurry;
J. screening and separating: screening and separating the secondary slurry by using a pressure screen, and further screening, separating and removing impurities from the raw material by using a centrifugal principle;
K. and (3) secondary iron removal: removing residual iron elements in the secondary slurry by using a liquid magnet iron remover, namely adsorbing the iron elements to the surface of a magnet by using a strong magnetic field in the iron remover to further remove the iron elements in the secondary slurry, and preparing pure plant fiber slurry;
step three, pulping by chemical fibers: adding water into polypropylene fibers, and crushing to prepare chemical fiber slurry, wherein the concentration of the chemical fiber slurry is 7%;
step four, slurry preparation: mixing the pure plant fiber slurry and the chemical fiber slurry, and adjusting the concentration to prepare raw material slurry, wherein the concentration of the raw material slurry is 2%;
and step five, preparing the raw material slurry into a finished product of the packaging cover board paper by papermaking, drying and forming in sequence.
In the ITO conductive glass finished product packaging cover plate paper prepared in the embodiment, hot melts are 0.5% and ash content is 1% in a high-temperature and high-humidity environment; tensile strength: longitudinal direction is 3KN/m, and transverse direction is 1.4 KN/m; paper smoothness: longitudinal direction 27s, transverse direction 16 s.
Example 3
The packaging cover board paper for the ITO conductive glass finished product is different from and improved by embodiment 1 or 2 in that the packaging cover board paper is obtained by processing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers serving as main raw materials, wherein the polypropylene fibers account for 15%, the refined modified cotton fibers account for 35% and the eucalyptus fibers account for 50%. The preparation method comprises the following steps:
step one, weighing raw materials: weighing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers according to the mass percentage;
step two, pulping and purifying the refined modified cotton fiber and the eucalyptus fiber respectively, and comprising the following steps:
A. pulping: adding water into the blocky plant fibers and crushing the blocky plant fibers to prepare liquid primary slurry, wherein the concentration of the primary slurry is 7%; wherein the beating degree of the primary pulp of the refined modified cotton fiber is 23 degrees SR, and the beating degree of the primary pulp of the eucalyptus fiber is 18 degrees SR;
B. oil removal: steam heating and stirring the primary slurry to precipitate impurities such as grease, inorganic salt and oxide contained in the plant fiber;
C. and (3) filtering: then the primary slurry is placed into an arc sieve for filtering to obtain solid plant fiber, and the aim is to separate the plant fiber from water, and discharge impurities such as grease, inorganic salt, oxide and the like along with the water;
D. diluting: adding water into the solid plant fiber, and adjusting the concentration of the liquid slurry of the plant fiber to prepare secondary slurry, wherein the concentration of the secondary slurry is 5%;
E. deslagging: removing heavy and light impurities in the secondary slurry by using a slag remover, so as to remove impurities with a specific gravity larger than that of the plant fibers in the slurry;
F. grinding: grinding the secondary slurry, optimizing the beating degree and the silk weight of the secondary slurry, and further promoting the separation of impurities with large specific gravity and iron element components in the plant fibers, wherein the beating degree of the refined modified cotton fiber secondary slurry is 32 DEG SR, and the beating degree of the eucalyptus fiber secondary slurry is 23 DEG SR;
G. iron removal: the liquid magnet iron remover is used for removing iron from the secondary slurry, namely, iron elements are adsorbed to the surface of the magnet by using a strong magnetic field in the iron remover, so that the purpose of removing the iron elements in the secondary slurry is achieved;
H. and (3) secondary dilution: adjusting the concentration of the secondary slurry to 2% by using a concentration regulator, and promoting further separation of impurities with large specific gravity;
I. secondary deslagging: removing heavy and light impurities remained in the secondary slurry by using a slag remover, and further removing impurities with a specific gravity larger than that of the plant fibers in the slurry;
J. screening and separating: screening and separating the secondary slurry by using a pressure screen, and further screening, separating and removing impurities from the raw material by using a centrifugal principle;
K. and (3) secondary iron removal: removing residual iron elements in the secondary slurry by using a liquid magnet iron remover, namely adsorbing the iron elements to the surface of a magnet by using a strong magnetic field in the iron remover to further remove the iron elements in the secondary slurry, and preparing pure plant fiber slurry;
step three, pulping by chemical fibers: adding water into polypropylene fibers, and crushing to prepare chemical fiber slurry, wherein the concentration of the chemical fiber slurry is 7%;
step four, slurry preparation: mixing the pure plant fiber slurry and the chemical fiber slurry, and adjusting the concentration to prepare raw material slurry, wherein the concentration of the raw material slurry is 2%;
and step five, preparing the raw material slurry into a finished product of the packaging cover board paper by papermaking, drying and forming in sequence.
In the ITO conductive glass finished product packaging cover board paper prepared in the embodiment, hot melts are 0.6% and ash content is 0.8% in a high-temperature and high-humidity environment; tensile strength: longitudinal direction is 3.2KN/m, and transverse direction is 1.6 KN/m; paper smoothness: longitudinal direction 30s and transverse direction 18 s.
Example 4
The packaging cover board paper for the ITO conductive glass finished product is different from and improved by any one of embodiments 1 to 3 in that the packaging cover board paper is obtained by processing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers serving as main raw materials, wherein the content of the polypropylene fibers is 5%, the content of the refined modified cotton fibers is 35% and the content of the eucalyptus fibers is 60%. The preparation method comprises the following steps:
step one, weighing raw materials: weighing polypropylene fibers, refined modified cotton fibers and eucalyptus fibers according to the mass percentage;
step two, pulping and purifying the refined modified cotton fiber and the eucalyptus fiber respectively, and comprising the following steps:
A. pulping: adding water into the blocky plant fibers and crushing the blocky plant fibers to prepare liquid primary slurry, wherein the concentration of the primary slurry is 8%; wherein the beating degree of the primary pulp of the refined modified cotton fiber is 25 DEG SR, and the beating degree of the primary pulp of the eucalyptus fiber is 19 DEG SR;
B. oil removal: steam heating and stirring the primary slurry to precipitate impurities such as grease, inorganic salt and oxide contained in the plant fiber;
C. and (3) filtering: then the primary slurry is placed into an arc sieve for filtering to obtain solid plant fiber, and the aim is to separate the plant fiber from water, and discharge impurities such as grease, inorganic salt, oxide and the like along with the water;
D. diluting: adding water into the solid plant fiber, and adjusting the concentration of the liquid slurry of the plant fiber to prepare secondary slurry, wherein the concentration of the secondary slurry is 6%;
E. deslagging: removing heavy and light impurities in the secondary slurry by using a slag remover, so as to remove impurities with a specific gravity larger than that of the plant fibers in the slurry;
F. grinding: grinding the secondary slurry, optimizing the beating degree and the silk weight of the secondary slurry, and further promoting the separation of impurities with large specific gravity and iron element components in the plant fibers, wherein the beating degree of the primary refined modified cotton fiber slurry is 34 DEG SR, and the beating degree of the primary eucalyptus fiber slurry is 25 DEG SR;
G. iron removal: the liquid magnet iron remover is used for removing iron from the secondary slurry, namely, iron elements are adsorbed to the surface of the magnet by using a strong magnetic field in the iron remover, so that the purpose of removing the iron elements in the secondary slurry is achieved;
H. and (3) secondary dilution: adjusting the concentration of the secondary slurry to 2% by using a concentration regulator, and promoting further separation of impurities with large specific gravity;
I. secondary deslagging: removing heavy and light impurities remained in the secondary slurry by using a slag remover, and further removing impurities with a specific gravity larger than that of the plant fibers in the slurry;
J. screening and separating: screening and separating the secondary slurry by using a pressure screen, and further screening, separating and removing impurities from the raw material by using a centrifugal principle;
K. and (3) secondary iron removal: removing residual iron elements in the secondary slurry by using a liquid magnet iron remover, namely adsorbing the iron elements to the surface of a magnet by using a strong magnetic field in the iron remover to further remove the iron elements in the secondary slurry, and preparing pure plant fiber slurry;
step three, pulping by chemical fibers: adding water into polypropylene fibers, and crushing to prepare chemical fiber slurry, wherein the concentration of the chemical fiber slurry is 8%;
step four, slurry preparation: mixing the pure plant fiber slurry and the chemical fiber slurry, and adjusting the concentration to prepare raw material slurry, wherein the concentration of the raw material slurry is 2.5%;
and step five, preparing the raw material slurry into a finished product of the packaging cover board paper by papermaking, drying and forming in sequence.
In the ITO conductive glass finished product packaging cover board paper prepared in the embodiment, hot melts are 0.4% and ash content is 1.2% in a high-temperature and high-humidity environment; tensile strength: longitudinal direction is 2.3KN/m, and transverse direction is 1 KN/m; paper smoothness: longitudinal direction 25s, transverse direction 15 s.
Example 5
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 1 in that: the packaging cover board paper is obtained by processing polypropylene fibers, pinus parviflora fibers and eucalyptus fibers serving as main raw materials, wherein the polypropylene fibers account for 5%, the pinus parviflora fibers account for 45% and the eucalyptus fibers account for 50%.
The ITO conductive glass finished product packaging cover plate paper is prepared according to the preparation method in the embodiment 1, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.4%, and the ash content is 1.2%; tensile strength: longitudinal direction is 2.4KN/m, and transverse direction is 1.2 KN/m; paper smoothness: longitudinal direction 25s, transverse direction 15 s.
Example 6
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 2 in the following aspects: the packaging cover board paper is obtained by processing polypropylene fibers, pinus parviflora fibers and eucalyptus fibers serving as main raw materials, wherein the polypropylene fibers account for 10%, the pinus parviflora fibers account for 40% and the eucalyptus fibers account for 50%.
The ITO conductive glass finished product packaging cover plate paper is prepared according to the preparation method in the embodiment 2, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.5%, and the ash content is 1%; tensile strength: the longitudinal direction is 2.9KN/m, and the transverse direction is 1.4 KN/m; paper smoothness: longitudinal direction 27s, transverse direction 17 s.
Example 7
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 3 in the following aspects: the packaging cover board paper is obtained by processing polypropylene fibers, pinus parviflora fibers and eucalyptus fibers serving as main raw materials, wherein the polypropylene fibers account for 15%, the pinus parviflora fibers account for 35% and the eucalyptus fibers account for 50%.
The ITO conductive glass finished product packaging cover plate paper is prepared according to the preparation method in the embodiment 3, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.6%, and the ash content is 0.8%; tensile strength: longitudinal direction is 3.3KN/m, and transverse direction is 1.6 KN/m; paper smoothness: longitudinal direction 30s and transverse direction 18 s.
Example 8
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 4 in that: the packaging cover board paper is obtained by processing polypropylene fibers, pinus parviflora fibers and eucalyptus fibers serving as main raw materials, wherein the polypropylene fibers account for 5%, the pinus parviflora fibers account for 35% and the eucalyptus fibers account for 60%.
The ITO conductive glass finished product packaging cover plate paper is prepared according to the preparation method in the embodiment 4, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.4%, and the ash content is 1.2%; tensile strength: longitudinal direction is 2.4KN/m, and transverse direction is 1.1 KN/m; paper smoothness: longitudinal direction 25s, transverse direction 15 s.
Example 9
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 1 in that: the packaging cover board paper is obtained by processing polyester fibers, refined modified cotton fibers and eucalyptus fibers serving as main raw materials, wherein the polyester fibers account for 5%, the refined modified cotton fibers account for 45% and the eucalyptus fibers account for 50%.
The ITO conductive glass finished product packaging cover plate paper is prepared according to the preparation method in the embodiment 1, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.4%, and the ash content is 1.2%; tensile strength: longitudinal direction is 2.6KN/m, and transverse direction is 1.3 KN/m; paper smoothness: longitudinal direction 26s, transverse direction 16 s.
Example 10
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 6 in that: the packaging cover board paper is obtained by processing polyester fibers, pinus parviflora fibers and eucalyptus fibers serving as main raw materials, wherein the polyester fibers account for 10%, the pinus parviflora fibers account for 40% and the eucalyptus fibers account for 60%.
The ITO conductive glass finished product packaging cover plate paper is prepared according to the preparation method in the embodiment 6, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.5%, and the ash content is 1%; tensile strength: longitudinal direction is 3KN/m, and transverse direction is 1.4 KN/m; paper smoothness: longitudinal direction 28s, transverse direction 17 s.
Example 11
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 7 in that: the packaging cover board paper is obtained by processing polypropylene fibers, polyester fibers, pinus fibers and eucalyptus fibers which are used as main raw materials, wherein the total content of the polypropylene fibers and the polyester fibers is 15%, the content of the pinus fibers is 35% and the content of the eucalyptus fibers is 50%.
The packaging cover board paper of the ITO conductive glass finished product is prepared according to the preparation method in the embodiment 7, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.6 percent, and the ash content is 0.8 percent; tensile strength: longitudinal direction is 3.2KN/m, and transverse direction is 1.5 KN/m; paper smoothness: longitudinal direction 30s, transverse direction 17 s.
Example 12
The packaging cover board paper of the ITO conductive glass finished product of the embodiment is different from the packaging cover board paper of the embodiment 8 in that: the packaging cover board paper is processed by taking polypropylene fiber, refined modified cotton fiber, pinus fiber and eucalyptus fiber as main raw materials, wherein the polypropylene fiber accounts for 10%, the refined modified cotton fiber accounts for 15%, the pinus fiber accounts for 15% and the eucalyptus fiber accounts for 60%.
The packaging cover board paper of the ITO conductive glass finished product is prepared according to the preparation method in the embodiment 8, the hot melt content of the prepared finished product in a high-temperature and high-humidity environment is 0.5%, and the ash content is 1.2%; tensile strength: longitudinal direction is 2.7KN/m, and transverse direction is 1.3 KN/m; paper smoothness: longitudinal direction 27s, transverse direction 16 s.
While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (7)
1. The utility model provides a ITO conductive glass finished product packing apron paper which characterized in that: the packaging cover board paper is processed by taking chemical fibers and plant fibers as main raw materials, wherein the chemical fibers account for 5-15% by mass, and the plant fibers account for 85-95% by mass;
the plant fiber comprises at least one of refined modified cotton fiber and pinus tabulaeformis fiber and eucalyptus fiber;
the mass percentage of the eucalyptus fibers in the main raw material of the cover plate paper is 50-60%;
the preparation method of the ITO conductive glass finished product packaging cover plate paper comprises the following steps:
step one, weighing raw materials: weighing chemical fibers and plant fibers according to the mass percentage;
step two, pulping and purifying plant fibers:
A. pulping: adding water into the blocky plant fibers and crushing to prepare primary slurry;
B. oil removal: carrying out steam heating and stirring on the primary slurry to promote separation of impurities such as grease and the like;
C. and (3) filtering: placing the primary slurry into an arc sieve for filtering to obtain solid plant fibers;
D. diluting: adding water into the solid plant fiber, and adjusting the concentration of the liquid slurry of the plant fiber to prepare secondary slurry;
E. deslagging: removing heavy and light impurities in the secondary slurry by using a slag remover;
F. grinding: grinding the secondary slurry;
G. iron removal: utilizing a liquid magnet iron remover to remove iron from the secondary slurry;
H. and (3) secondary dilution: adjusting the concentration of the secondary slurry by using a concentration adjuster;
I. secondary deslagging: removing heavy and light impurities remained in the secondary slurry by using a slag remover;
J. screening and separating: screening and separating the secondary slurry by using a pressure screen;
K. and (3) secondary iron removal: removing residual iron elements in the secondary slurry by using a liquid magnet iron remover to prepare pure plant fiber slurry;
step three, pulping by chemical fibers: adding water into chemical fiber and crushing to prepare chemical fiber slurry;
step four, slurry preparation: mixing the pure plant fiber slurry and the chemical fiber slurry, and adjusting the concentration to prepare raw material slurry;
and step five, preparing the raw material slurry into a finished product of the packaging cover board paper by papermaking, drying and forming in sequence.
2. The ITO conductive glass product packaging cover plate paper of claim 1, wherein: the chemical fiber is polypropylene fiber or polyester fiber or the mixture of the polypropylene fiber and the polyester fiber.
3. The method for preparing ITO conductive glass finished product packaging cover plate paper according to claim 1, wherein the method comprises the following steps: when the plant fiber is pulped and purified, the eucalyptus fiber, the refined modified cotton fiber and the pinus sylvestris fiber are pulped and purified respectively, wherein,
the beating degree of the eucalyptus fibers after the beating in the step A is 17-19 DEG SR, the beating degree after the beating in the step F is 20-25 DEG SR,
and (3) pulping the refined modified cotton fibers and the pinus sylvestris fibers in the step A to obtain a pulp degree of 20-25 DEG SR, and pulping in the step F to obtain a pulp degree of 28-34 DEG SR.
4. The method for preparing ITO conductive glass finished product packaging cover plate paper according to claim 1, wherein the method comprises the following steps: the water used in the steps of pulping and purifying the plant fiber is purified water obtained by filtering quartz sand, activated carbon and a 10 mu m filter element in sequence.
5. The method for preparing ITO conductive glass finished product packaging cover plate paper according to claim 1, wherein the method comprises the following steps: the magnetic field intensity in the liquid magnet iron remover is required to be more than 1200 gauss.
6. The method for preparing ITO conductive glass finished product packaging cover plate paper according to claim 1, wherein the method comprises the following steps: the contact part of the equipment and the slurry used in the preparation step is made of 304 stainless steel or 306 stainless steel.
7. The method for preparing ITO conductive glass finished product packaging cover plate paper according to claim 1, wherein the method comprises the following steps: the concentration of the raw material slurry is 1.8-2.5%.
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| CN105926367A (en) * | 2016-05-16 | 2016-09-07 | 河南银鸽实业投资股份有限公司 | Mildew-proof and anti-bacterium liquid crystal electronic glass partition paper and production technology thereof |
| CN106894291A (en) * | 2017-02-22 | 2017-06-27 | 长沙理工大学 | A kind of manufacture method of glass barrier paper |
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| CN202577057U (en) * | 2012-04-19 | 2012-12-05 | 陈伟 | Crystal surface paper |
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| CN105926367A (en) * | 2016-05-16 | 2016-09-07 | 河南银鸽实业投资股份有限公司 | Mildew-proof and anti-bacterium liquid crystal electronic glass partition paper and production technology thereof |
| CN106894291A (en) * | 2017-02-22 | 2017-06-27 | 长沙理工大学 | A kind of manufacture method of glass barrier paper |
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| "化学纤维在造纸工业上的应用";王川浩;《纸和造纸》;19890402;第34页左栏"常用的化学纤维及纸张特性"和"在造纸工业中的应用" * |
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