KR101752795B1 - Preparation method of pulp for stainless steel interleaving paper and pulp produced by the same - Google Patents
Preparation method of pulp for stainless steel interleaving paper and pulp produced by the same Download PDFInfo
- Publication number
- KR101752795B1 KR101752795B1 KR1020160009665A KR20160009665A KR101752795B1 KR 101752795 B1 KR101752795 B1 KR 101752795B1 KR 1020160009665 A KR1020160009665 A KR 1020160009665A KR 20160009665 A KR20160009665 A KR 20160009665A KR 101752795 B1 KR101752795 B1 KR 101752795B1
- Authority
- KR
- South Korea
- Prior art keywords
- pulp
- fiber length
- present
- average fiber
- softwood
- Prior art date
Links
Images
Classifications
-
- 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
- D21D1/30—Disc mills
-
- 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
- D21D1/004—Methods of beating or refining including disperging or deflaking
- D21D1/006—Disc mills
-
- 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
- D21D1/30—Disc mills
- D21D1/303—Double disc mills
-
- 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
- D21D1/30—Disc mills
- D21D1/306—Discs
-
- 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
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/02—Material of vegetable origin
-
- 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
-
- 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
- D21H27/002—Tissue paper; Absorbent paper
- D21H27/004—Tissue paper; Absorbent paper characterised by specific parameters
- D21H27/005—Tissue paper; Absorbent paper characterised by specific parameters relating to physical or mechanical properties, e.g. tensile strength, stretch, softness
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Paper (AREA)
Abstract
The present invention relates to a method for producing a pulp excellent in heat resistance and oil resistance and a pulp produced therefrom. Accordingly, the pulp manufacturing method can produce a pulp having excellent heat resistance and oil resistance. Therefore, the pulp according to the present invention can be excellent in tensile strength and tear strength, and can be easily applied as a separator for separators, particularly stainless steel.
Description
The present invention relates to a method for producing a pulp excellent in heat resistance and oil resistance and a pulp produced therefrom.
Generally, in order to protect the surface of a steel sheet in the manufacture of a steel sheet such as stainless steel, interleaving paper is inserted when the steel sheet is wound. Specifically, the separator is interposed between the steel sheet and the steel sheet to serve as an impact-reducing material, and also serves to prevent surface scratches that may occur during processing, transportation, and storage such as a rolling process. Therefore, it is indispensable to manufacture a steel sheet.
The commonly used sheet paper for steel sheet is produced by treating hardwood pulp with a high-speed cracker and using a ring-type paper machine. At this time, the hardwood pulp has a weak fiber so that the freeness is 600 ml CSF to preserve the fiber length. When the rolled steel sheet has a high degree of freeness, when the rolling oil of about 70 ° C is inserted between the treated steel sheets, there is a problem that tensile strength, tear strength and surface roughness are remarkably lowered due to heat and rolling oil.
On the other hand, Yeosu can be controlled by degree of disposal. The beating process is performed by a beating plate mounted in a beaker, and a typical beating plate currently in use has a pattern having a wide width and a wide beating width (see FIG. 1A). Such a high-defoluble plate having a wide blade may be difficult to preserve the fiber length and is applicable to the treatment of softwood pulp having a relatively long fiber length, but may be unsuitable for the treatment of hardwood pulp.
Therefore, there is a need for a method for manufacturing a paperboard having improved tensile strength, tear strength and surface roughness by using a paper sheet, particularly a hardwood pulp.
Disclosure of Invention Technical Problem [8] The present invention has been made to solve the problems of the prior art, and it is an object of the present invention to provide a pulp manufacturing method excellent in heat resistance and oil resistance.
Another object of the present invention is to provide a pulp which can be used as a separator for stainless steel, for example, manufactured from the above-mentioned production method.
In order to solve the above-mentioned problems, the present invention provides a method for producing a hardwood pulp which comprises a step of crushing a raw pulp with a high-boiling plate, wherein the raw pulp is a mixture of a hardwood pulp and a softwood pulp, 1.5 mm, and the softwood pulp has an average fiber length of 2.0 mm to 4.5 mm.
In a preferred embodiment of the present invention, the mixture comprises 15% by weight or less of softwood pulp.
In a preferred embodiment of the present invention, the mixture may include a hardwood pulp and a softwood pulp at a weight ratio of 85:15 to 95: 5.
In one preferred embodiment of the present invention, the hardwood pulp may be a hardwood unbleached kraft pulp.
In a preferred embodiment of the present invention, the softwood pulp may be softwood bleached kraft pulp.
In a preferred embodiment of the present invention, the bulky plate may have a width of 3 mm to 5 mm and a width of 3 mm to 5 mm.
In one preferred embodiment of the present invention, the bulky plate may have a width of 1.5 mm to 2.5 mm and a width of 1.5 mm to 2.5 mm.
In a preferred embodiment of the present invention, the beat plate may have a blade angle of 15 ° to 30 °.
In a preferred embodiment of the present invention, the above-mentioned beating treatment may be performed until the freeness of the raw pulp reaches a level of 600 mL CSF or less.
In a preferred embodiment of the present invention, the above-mentioned high-temperature treatment may be performed until the freeness of the raw pulp reaches a level of 300 mL CSF to 500 mL CSF.
The present invention also provides a pulp produced from the above-described production method.
In a preferred embodiment of the present invention, the pulp may have a water permeability of 600 mL CSF or less.
In a preferred embodiment of the present invention, the pulp may have a water permeability of 300 mL CSF to 500 mL CSF.
In one preferred embodiment of the present invention, the pulp includes short fibers and long fibers, and the short fibers may have an average fiber length of 0.3 to 0.8 times the average fiber length of the long fibers.
In one preferred embodiment of the present invention, the pulp contains short fibers and long fibers at a weight ratio of 85:15 to 95: 5, and the short fibers have an average fiber length of 0.3 to 0.8 times the average length of long fibers .
In a preferred embodiment of the present invention, the pulp may be used as a separator.
In a preferred embodiment of the present invention, the pulp may be used as a sheet for stainless steel.
The method for producing pulp according to the present invention is characterized in that a lignin-free water-soluble pulp, which is a mixture of hardwood pulp and softwood pulp containing a certain percentage of softwood pulp as raw pulp, Can be manufactured.
Further, the method of producing pulp according to the present invention can be used to produce a pulp having excellent heat resistance and oil resistance by promoting the fibrillation of the inside and outside while preserving the fiber length even in a strong beating process, .
In addition, the pulp according to the present invention can be excellent in heat resistance and oil resistance due to the above-mentioned production method, and thus can be excellent in tensile strength and tear strength, and can be easily applied as a sheet paper, in particular, as a sheet paper for stainless steel have.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate preferred embodiments of the invention and, together with the description of the invention given above, serve to further the understanding of the technical idea of the invention, It should not be construed as limited.
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view exemplarily showing a brittle plate according to an embodiment of the present invention, wherein (a) is a high-weather plate having a blade width of 3.5 mm and (b) is a brittle plate having a narrow blade having a blade width of 2.0 .
2 is a graph showing tensile strength analysis results of the pulp of Examples 1 to 3 and Comparative Examples 1 and 2 according to an embodiment of the present invention.
3 is a graph showing the tear strength analysis results of the pulp of Examples 1 to 3 and Comparative Examples 1 and 2 according to an embodiment of the present invention.
FIG. 4 is a graph of surface top roughness analysis results for the pulp of Examples 1 to 3 and Comparative Examples 1 and 2 according to one embodiment of the present invention. FIG.
5 is a graph showing bottom roughness analysis results of the pulp of Examples 1 to 3 and Comparative Examples 1 and 2 according to an embodiment of the present invention.
FIG. 6 is a graph showing tensile strength analysis results of the pulps of Examples 1 to 6 according to an embodiment of the present invention. FIG.
FIG. 7 is a graph showing the tear strength analysis results of the pulp of each of Examples 1 to 6 according to an embodiment of the present invention.
FIG. 8 is a graph of top roughness analysis results for each of the pulp of Examples 1 to 6 according to an embodiment of the present invention. FIG.
FIG. 9 is a graph of bottom roughness analysis results of the pulp of each of Examples 1 to 6 according to an embodiment of the present invention. FIG.
Hereinafter, the present invention will be described in detail in order to facilitate understanding of the present invention.
The terms and words used in the present specification and claims should not be construed in an ordinary or dictionary sense and the inventor can properly define the concept of the term to describe its invention in the best possible way It should be construed as meaning and concept consistent with the technical idea of the present invention.
The present invention provides a method for producing a pulp having excellent heat resistance and oil resistance.
The manufacturing method according to an embodiment of the present invention includes a step of crushing raw pulp using a high-grade plate, wherein the raw pulp is a mixture of hardwood pulp and softwood pulp, and the hardwood pulp has an average fiber length of 0.7 mm To 1.5 mm, and the softwood pulp has an average fiber length of 2.0 mm to 4.5 mm.
Generally, in the case of the hardwood pulp, the fiber length is short and the pulp is used as the raw pulp to make the pulp, the feathering treatment is performed weakly, the produced pulp has a high degree of freeness and the bonding force between the fibers is not good and heat resistance and oil resistance characteristics may be poor. Accordingly, there is a need for a method for imparting excellent heat resistance and oil resistance to finally produced pulp while using hardwood pulp as raw pulp.
Accordingly, the present invention provides a method for producing a pulp having excellent heat resistance and oil resistance by using a mixture in which softwood pulp having a relatively long fiber length is added to hardwood pulp as a raw pulp at a specific ratio.
Specifically, the raw pulp may be a mixture of hardwood pulp and softwood pulp as described above, and the mixture may contain 15 wt% or less of softwood pulp. Preferably, the mixture may comprise from 5% to less than 15% by weight of softwood pulp, more preferably the mixture comprises hardwood pulp and softwood pulp in a weight ratio of 85:15 to 95: 5 . If the mixture contains 15% by weight or more of the softwood pulp, the heat and oil resistance characteristics of the pulp produced from the resultant mixture may be greatly improved to greatly improve the tensile strength and tear strength, There is a possibility that a problem of deterioration may occur. Further, when the mixture contains the softwood pulp at a ratio of less than 5% by weight, the heat and oil resistance properties are rapidly increased when they are exposed to a high temperature (for example, 70 ° C) There may arise a problem of decrease.
Here, the lignin is a net-like polymer compound produced by condensation of a constituent unit having phenylpropane skeleton as a component of a cotton plant such as wood, straw, and straw, It can act as a material to reduce oil resistance.
The hardwood pulp may have an average fiber length of 0.7 mm to 1.5 mm as described above. The hardwood pulp may be an unbleached chemical pulp, preferably a hardwood unbleached kraft pulp.
The softwood pulp may have an average fiber length of 2.0 mm to 4.5 mm as described above, but is not particularly limited, but may be a bleached chemical pulp and preferably a softwood bleached kraft pulp.
Here, the "average of fiber length" represents an average value of fiber length, which is a value measured using a fiber length analyzer.
Also, the beating process according to an embodiment of the present invention may be performed using a beater equipped with a beating plate.
Here, as shown in Fig. 1, the high-temperature plate may have a plurality of fan-shaped members and have a ring shape, and may have a pattern of a plurality of blades and grooves radially formed in the radial direction with respect to the annular center portion.
According to one embodiment of the present invention, the high-temperature plate is not particularly limited, but may have a pattern with a blade width of 3 mm to 5 mm and a groove width of 3 mm to 5 mm. Preferably, the brittle plate may have a width of 1.5 mm to 2.5 mm and a width of 1.5 mm to 2.5 mm. Here, the blade width and groove width of the hardening plate may be different from each other or the same. If the blade and groove width of the deflocculating plate are as narrow as the above range, particularly the blade width is 1.5 mm to 2.5 mm, strong brittleness treatment can be performed while preserving the fiber length during the defatting treatment, thereby accelerating the fibrillation inside and outside, Can be increased, and a relatively low level of Yeosu can be treated. As a result, the heat resistance and oil resistance of the pulp produced by using the high-boiling plate can be improved.
In addition, the raw pulp according to an embodiment of the present invention may contain a large amount of hardwood pulp having a relatively short fiber length, so that it may be difficult to treat the hard pulp. However, the pulp has a blade width of 1.5 mm to 2.5 mm, By using a high-resolution plate having a pattern with a groove width of 1.5 mm to 2.5 mm, it is possible to improve the bonding force between fibers while preserving the fiber length even in a strong brittle process.
Here, the blade width represents the width of a blade which is a portion which contacts the pulp of the raw material during the beating process and which heats the raw pulp, and the groove width represents a distance between the blade and the blade.
Further, the defatted plate may have a blade angle of 10 ° to 45 °. Preferably, the blade angle may be 15 to 30 degrees. If the blade angle is in the above range, it is possible to reduce the machine noises at the time of beating and reduce the cutting of the fibers, thereby improving the cutting efficiency.
Here, the blade angle represents an angle formed by the radial line and the blade from the center of the brittle plate. When the blade angle of each blade is different, the blade angle is taken as the blade angle of the blade.
For example, the beaker may be a Hollander beater, a conical refiner, a disk refiner, or the like. In addition, ) And the like. And the conical type cracker and the disk type cracker may be continuous, and the flow of the raw pulp may be undesirable. In this case, when the flow of the raw pulp is perpendicular to the rotating pulley, It can be confusing when flowing the intersection of plate blade edge in parallel.
Further, the high-defoluble plate according to an embodiment of the present invention is not particularly limited, but may be one used for a disk-type defibter. At this time, the disk-type separator may be a single disk separator or a double disk separator.
Here, the single disk deflector uses a fixed blade installed opposite to the rotary blade and the rotary blade, and the double disk deflector uses two rotary blades and a fixed blade installed in opposition thereto.
The material of the refractory plate is not particularly limited and may be a material commonly known in the art. For example, it may be stainless steel in view of durability and strength.
The high-temperature treatment may be performed until the freeness of the raw pulp reaches 600 mL CSF or lower, and preferably, the freeness of the raw pulp is in the range of 300 mL CSF to 500 mL CSF It can be done until reaching. At this time, the freeness of the raw pulp before the high-temperature treatment may be 650 mL CSF to 730 mL CSF.
Herein, the "freeness" refers to a numerical value indicating the degree of water fall of the pulp. The freeness of a 1,000 mL pulp having a concentration of 0.3% is measured using a Canadian standard freeness tester Respectively.
The present invention also provides a pulp produced from the above-described production method.
The pulp according to one embodiment of the present invention is manufactured by the above-described manufacturing method and may have a water fineness of less than 600 mL CSF (Canadian standard freeness). Preferably, the pulp may have a freeness of 300 mL CSF to 500 mL CSF. If the pulp has a degree of freeness in the above range, the oil resistance may be excellent, and as a result, when the pulp is used as a sheet of a rolled steel sheet, the absorption rate of the rolling oil may be decreased to exhibit excellent tensile strength and tear strength .
In addition, the pulp may include short fibers and long fibers, wherein the short fibers may have an average fiber length of 0.3 to 0.8 times the average fiber length of the long fibers. Specifically, the pulp may contain short fibers and long fibers at a weight ratio of 85:15 to 95: 5. If the pulp contains the short fibers and the long fibers in the above ratio range, the bonding strength between the fibers can be improved by the long fibers included in the specific ratio, the accumulation of heat can be dispersed, and the heat resistance characteristics can be improved And as a result, it can exhibit excellent tear strength characteristics when it is used as a hot rolled steel sheet.
Herein, the term "short fibers" refers to short fibers having an average fiber length of less than 1.5 mm, and the "long fibers" refers to long fibers having an average fiber length of at least 1.5 mm.
The pulp may also have a tensile strength of 3.2 kN to 4.6 kN and a tear strength of 550 mN to 700 mN.
The tensile strength was measured at a test speed of 10 mm / min according to ASTM D-638 using a universal testing machine (UTM LLOYD Instruments, Model No. LR10K), and the tear strength was measured according to ASTM D-1922 At a test speed of 500 mm / min.
Meanwhile, the pulp according to one embodiment of the present invention is not particularly limited but may be used as a separator.
Specifically, the pulp may be a gypsum, preferably used as a gypsum board for metal, and more preferably used as a gypsum board for stainless steel.
When the pulp according to an embodiment of the present invention is used as a separator, for example, as a separator for stainless steel, the pulp has excellent resistance to heat and oil, and has resistance to high temperature and rolling oil, thereby exhibiting tensile strength, tear strength and surface roughness Can be maintained excellent, and repeated use can be possible.
Hereinafter, the present invention will be described in more detail with reference to Examples and Experimental Examples. However, the following Examples and Experimental Examples are provided for illustrating the present invention, and the scope of the present invention is not limited by these Examples and Experimental Examples.
Example 1
The raw pulp diluted with water to a weight concentration of 3% was pulverized using a separator until the freeness became 600 mL CFS. At this time, the raw pulp was a blend containing unbleached bleached kraft pulp (freeness 650 mL CSF, average fiber length 1.3 mm) and softwood bleached kraft pulp (freeness 730 mL, average fiber length 2.3 mm) at a weight ratio of 95: 5 , And the high-pressure was operated at a motor load of 40 kW, a rotation speed of 1072 rpm, and a flow rate of 20 m 3 / h using a single disk confounder. Further, a high-temperature plate having a blade width of 3.5 mm, a groove width of 3.5 mm and an average blade angle of 30 ° was used. At this time, the freeness and average fiber length of raw pulp were measured by using Canadian standard freeness meter and fiber length meter after each pulp was dissociated using a laboratory water analyzer.
Example 2
A pulp was prepared in the same manner as in Example 1, except that a mixture containing unbranched hardwood bleached kraft pulp and coniferous ivory kraft pulp at a weight ratio of 90:10 was used as the raw pulp.
Example 3
A pulp was prepared in the same manner as in Example 1, except that a mixture containing unbleached hardwood bleached kraft pulp and softwooded kraft pulp at a weight ratio of 85:15 was used as raw pulp.
Example 4
A pulp was produced in the same manner as in Example 1, except that a blade having a blade width of 2.0 mm, a groove width of 2.0 mm and an average blade angle of 30 ° was used.
Example 5
A pulp was produced in the same manner as in Example 2 except that a blade having a blade width of 2.0 mm, a groove width of 2.0 mm and an average blade angle of 30 ° was used.
Example 6
A pulp was produced in the same manner as in Example 3, except that a blade having a blade width of 2.0 mm, a groove width of 2.0 mm and an average blade angle of 30 ° was used.
Comparative Example 1
A pulp was prepared in the same manner as in Example 1 except that only unbleached hardwood kraft pulp was used as the raw pulp.
Comparative Example 2
A pulp was prepared in the same manner as in Example 1, except that a blend containing unbleached hardwood bleached kraft pulp and coniferous droplet grafted pulp at a weight ratio of 80:20 was used as the raw pulp.
Experimental Example
In order to comparatively analyze the heat resistance and oil resistance characteristics of the pulps produced in Examples 1 to 6 and Comparative Examples 1 and 2, tensile strength, tear strength and surface roughness before and after the treatment with rolling oil at 70 ° C were measured Respectively. The results are shown in Figs. 2 to 9.
First, the pulp produced in each of the above Examples and Comparative Examples was cut to a size of 25 cm × 25 cm, and the rolling oil treatment was carried out using a pilot coater in a laboratory.
1) Tensile strength
Tensile strength was measured at a test speed of 10 mm / min according to ASTM D-638 using a Universal Testing Machine (UTM, LLOYD Instruments, Model No. LR10K).
2) Tear strength
The tear strength was measured at a test speed of 500 mm / min according to ASTM D-1922.
3) Surface roughness
The roughness of the top and bottom of each pulp was measured using PPS (Parker Print Surf, L & W).
As shown in FIGS. 2 to 5, the pulp of Examples 1 to 3 prepared using the mixed raw pulp according to one embodiment of the present invention had a pulp-to-pulp surface roughness characteristic (Comparative Example 1) The surface roughness and the roughness on the back surface) were maintained at the same level and the tensile strength and tear strength were remarkably increased.
Specifically, as shown in FIG. 2, the pulp of Examples 1 to 3 prepared using raw pulp containing a certain percentage of softwood pulp according to an embodiment of the present invention was pulverized into a raw pulp containing only hardwood pulp The tensile strength of the pulp of Comparative Example 1 was remarkably improved from about 1.5 to about 2.5 times before and after the treatment with the rolling oil. In addition, in the case of the pulp of Comparative Example 2 produced using the raw pulp containing the softwood pulp but containing the excessive amount out of the range of the present invention, the tensile strength was rather reduced compared to the pulp of Example 3 Respectively.
Further, as shown in FIG. 3, the pulp of Examples 1 to 3 prepared using raw pulp containing a certain percentage of softwood pulp according to an embodiment of the present invention is used as raw pulp containing only hardwood pulp , The tear strength was improved to about 1.5 times to about 2.0 times in both before and after the treatment with the rolling oil. In the case of the pulp of Comparative Example 2, which was produced by using raw pulp containing softwood pulp but exceeding the ratio range proposed by the present invention in an excessive amount, the tear strength of the pulp of Example 3 was rather reduced .
In addition, as shown in FIG. 4, the pulp of Examples 1 to 3 prepared using raw pulp containing a certain percentage of softwood pulp according to an embodiment of the present invention is used as raw pulp containing only hardwood pulp And a similar or somewhat better surface roughness and surface roughness as compared to the pulp of Comparative Example 2 prepared using raw pulp containing the softwood pulp but containing the excessive amount outside the range of the present invention, .
As a result, the heat and oil resistance characteristics of the pulp produced by preparing the pulp by using the manufacturing method according to one embodiment of the present invention, specifically, the mixture containing the softwood pulp at a specific ratio as the raw pulp can be greatly improved Lt; / RTI >
Meanwhile, as shown in FIGS. 6 to 9, the tensile strength, tensile strength and tensile strength of Examples 4 to 6, which were prepared by using a raw pulp according to an embodiment of the present invention, And surface roughness (including front and back surfaces) characteristics were further improved as compared with those of Examples 1 to 3. This is a result that it is possible to perform a strong brittleness treatment while preserving the fiber length, thereby improving the bonding strength between the fibers, by using a high-resolution plate having a narrow flap pattern.
Claims (17)
Wherein the raw pulp contains a broad-leaved pulp and a softwood pulp at a weight ratio of 85 or more to less than 90: more than 10 to 15,
The hardwood pulp has an average fiber length of 0.7 mm to 1.5 mm,
The softwood pulp has an average fiber length of 2.0 mm to 4.5 mm,
Wherein the raw pulp having a high heat treatment has a tensile strength of 4.0 kN / m or more before the rolling oil treatment at 70 占 폚 and a tensile strength of 3.7 kN / m or more after the rolling oil treatment at 70 占 폚.
Wherein the hardwood pulp is a hardwood bleached kraft pulp.
Wherein the softwood pulp is softwood bleached kraft pulp.
Wherein the brittle plate has a width of 3 mm to 5 mm and a groove width of 3 mm to 5 mm.
Wherein the brittle plate has a width of 1.5 mm to 2.5 mm and a groove width of 1.5 mm to 2.5 mm.
Wherein the defatted plate has a blade angle of 15 to 30 degrees.
Wherein the pulp comprises short fibers and long fibers,
Wherein the staple fibers have an average fiber length of 0.3 to 0.8 times the average fiber length of the long fibers.
Wherein the pulp contains short fibers and long fibers at a weight ratio of not less than 85 and not more than 90: not less than 10 and not more than 15,
Wherein the staple fibers have an average fiber length of 0.3 to 0.8 times the average fiber length of the long fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160009665A KR101752795B1 (en) | 2016-01-26 | 2016-01-26 | Preparation method of pulp for stainless steel interleaving paper and pulp produced by the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020160009665A KR101752795B1 (en) | 2016-01-26 | 2016-01-26 | Preparation method of pulp for stainless steel interleaving paper and pulp produced by the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| KR101752795B1 true KR101752795B1 (en) | 2017-06-30 |
Family
ID=59279535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1020160009665A KR101752795B1 (en) | 2016-01-26 | 2016-01-26 | Preparation method of pulp for stainless steel interleaving paper and pulp produced by the same |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR101752795B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241646A (en) * | 2017-12-29 | 2019-09-17 | 浙江华川实业集团有限公司 | A kind of manufacture craft of high temperature resistant stainless steel lining paper |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012149362A (en) * | 2011-01-20 | 2012-08-09 | Nippon Paper Industries Co Ltd | Method for preparing pulp |
| JP2013227714A (en) * | 2012-03-30 | 2013-11-07 | Nippon Paper Industries Co Ltd | Method for producing paper |
| JP2015018081A (en) * | 2013-07-10 | 2015-01-29 | 名古屋油化株式会社 | Sound absorption material and sound absorption material molding |
-
2016
- 2016-01-26 KR KR1020160009665A patent/KR101752795B1/en active IP Right Grant
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012149362A (en) * | 2011-01-20 | 2012-08-09 | Nippon Paper Industries Co Ltd | Method for preparing pulp |
| JP2013227714A (en) * | 2012-03-30 | 2013-11-07 | Nippon Paper Industries Co Ltd | Method for producing paper |
| JP2015018081A (en) * | 2013-07-10 | 2015-01-29 | 名古屋油化株式会社 | Sound absorption material and sound absorption material molding |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110241646A (en) * | 2017-12-29 | 2019-09-17 | 浙江华川实业集团有限公司 | A kind of manufacture craft of high temperature resistant stainless steel lining paper |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101734486B1 (en) | Process for the production of nano-fibrillar cellulose suspensions | |
| RU2596521C2 (en) | Cellulose nanofilaments with high coefficient of drawing and production methods thereof | |
| JP5848330B2 (en) | Cellulose nanofilament and method for producing cellulose nanofilament | |
| CA2883161C (en) | Methods of refining fibers, the fibers and products using the fibers | |
| DK2236545T3 (en) | A process for the preparation of nano-fibrillar cellulose gels | |
| Wang et al. | An improved fibril angle measurement method for wood fibres | |
| US20230035105A1 (en) | Surface enhanced pulp fibers at a substrate surface | |
| Kargupta et al. | Sustainable production process of mechanically prepared nanocellulose from hardwood and softwood: a comparative investigation of refining energy consumption at laboratory and pilot scale | |
| SE543552C2 (en) | Refined cellulose fiber composition | |
| AU2017327762B2 (en) | Method for producing cellulose filaments with less refining energy | |
| KR101752795B1 (en) | Preparation method of pulp for stainless steel interleaving paper and pulp produced by the same | |
| US3445329A (en) | Storage of high consistency refined pulp | |
| WO2012115526A1 (en) | Improved method of producing pulp from pinus radiata | |
| JP3218112B2 (en) | Fine fibrous polyolefin | |
| EP1508639A1 (en) | Process for the preparation of a high freeness beaten low lignin pulp with high strength | |
| Sparnochia et al. | Cell wall changes caused by refining in fibre of Eucalyptus grandis W. Hill ex Maiden bleached kraft pulp: a ultra-and nano-structural approach | |
| Sahoo et al. | PROCESSING AND CHARACTERIZATION OF MICRO AND NANOCELLULOSE FIBRES PRODUCED BY A LAB VALLEY BEATER (LVB) AND A SUPER MASSCOLLOIDER (SMC). | |
| JP4799384B2 (en) | Polyketone short fiber and method for producing the same | |
| JP2020059967A (en) | Laminated sheet | |
| Anderson et al. | Utilization of farm woodlot woods for roofing felt | |
| JP2019163569A (en) | Manufacturing method of cellulose nanofiber | |
| Thapa | Longitudinal Grinding of Aspen | |
| KR20050061917A (en) | Pulp refining method for high strength security paper manufacturing and pulp furnish |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| E701 | Decision to grant or registration of patent right | ||
| GRNT | Written decision to grant |