CN102154899B - Base paper of sandpaper and production method thereof - Google Patents
Base paper of sandpaper and production method thereof Download PDFInfo
- Publication number
- CN102154899B CN102154899B CN2011101087973A CN201110108797A CN102154899B CN 102154899 B CN102154899 B CN 102154899B CN 2011101087973 A CN2011101087973 A CN 2011101087973A CN 201110108797 A CN201110108797 A CN 201110108797A CN 102154899 B CN102154899 B CN 102154899B
- Authority
- CN
- China
- Prior art keywords
- paper
- less
- value
- slurry
- pulp
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Paper (AREA)
Abstract
The invention relates to a piece of base paper of sandpaper and a production method thereof. The method comprises the following steps: a fibre raw material is cooked to form paper pulp; and the fibre raw material comprises 70-80% of masson pine and the rest of eucalyptus, and the cooking kappa number is 38-48; and the paper pulp is prepared through pulping, desanding, mixing, finely screening by a pressurized screen, forming by loading a net, pressing, drying, calendering, winding, re-winding and packing. The longitudinal tensile index of the paper is no less than 80Nm/g, the transversal tensile index of the paper is no less than 45Nm/g, the folding strength of the paper is no less than 1,000 times, the horizontal shrinkage rate of the paper is no more than 3.5%, the tightness degree of the paper is no less than 0.78g/cm3, the smoothness of the paper is no less than 15s, the sizing degree of the paper is no more than 30g/m2, the longitudinal tensile strength of the paper is no less than 8.0kN, the horizontal tensile strength of the paper is no less than 3.0kN, the color of the paper is brown, the whiteness of the paper is 19%-26%, and the hue is as follows: L value of 65-75, a value of 3.5-7.5 and b value of 21-27.
Description
Technical field
The present invention relates to paper and production method thereof, especially relate to a kind of abrasive base paper and production method thereof, belong to the pulping and paper-making field.
Background technology
Sand paper is in order to surfaces such as abrasive metal, timber; So that its bright and clean level and smooth a kind of articles for use; According to the different polishing material; Have emery paper, artificial diamond's sand paper, glass paper etc. multiple, dry abrasive paper is used for polishing wood, articles made of bamboo are surperficial, and water-proof abrasive paper is used for burnished metal or non-metal workpiece surface in water or oil.Abrasive base paper matrix, abrasive material, binding agent are the important raw and processed materials in the sand paper production process, and the abrasive base paper matrix has material impact to the quality of sand paper, because of the quality requirement of abrasive base paper higher; The general abrasive base paper of producing needs all not manufacture paper with pulp with floating kp softwood pulp; Do not float natural color pulp because of using, when raw material and conditions of cooking fluctuation, paper color is difficult to be consistent; If the color of abrasive base paper is inconsistent, with the quality that influences final products.
The applicant applied for the patent of invention of title " method for producing Chinese red pine chemical pulp ", publication number CN101100820A, and open day is on January 9th, 2008, this patent application document has been introduced a kind of masson pine DDS displacement cooking method.
Summary of the invention
Technical problem to be solved by this invention provides a kind ofly can mix the broad-leaved wood fiber raw material, the paper color stable and consistent, and appearance looks elegant, quality be abrasive base paper and production method thereof preferably.This production method has low energy consumption, low pollution, paper physical intensity height, environmental friendliness, helps the characteristics of comprehensive utilization of resources.
In order to solve the problems of the technologies described above; The present invention provides the raw materials for production of abrasive base paper and production technology is improved; Use the masson pine of 70～80 weight portions, the Eucalyptus slurrying of 20～30 weight portions, the product of production reaches following technical indicator: vertically tensile index is not less than 80Nm/g, laterally tensile index is not less than 45Nm/g, folding and is not less than that 1000 times, lateral shrinkage are not more than 3.5%, tightness is not less than 0.78 g/cm
3, smoothness is not less than 15 s, degree of sizing is not more than 30 g/m
2, machine direction tensile strength is not less than 8.0kN, cross direction tensile strength is not less than 3.0 kN, paper color is brown, whiteness 19～26% (ISO), form and aspect: L value 65～75, a value 3.5～7.5, b value 21～27.
In order to solve the problems of the technologies described above and obtain the said goods; The basic production method that the present invention adopts may further comprise the steps: with the masson pine of 70～80 weight portions, the Eucalyptus of 20～30 weight portions; Through the DDS displacement cooking, wash sieve, oxonium base delignification, hydrogen peroxide bleaching and process the little wood pulp that floats of sulfate; Slurry through making beating, desanding, condiment, pressurized screen fine screen, go up net forming, squeezing, drying, soft calendaring, batch, rewinding, packing form 90～95 ℃ of Kappa number 38～48, oxonium base delignification stages time 60～90 minutes, slurry concentration 8%～12%, temperature, oxygen pressure 900～1000Kpa, pH value 10～12, air dried pulp flow of oxygen 20～30kg per ton, the sodium hydroxide concentration 20～35kg of DDS displacement cooking control slurry; 60～90 minutes hydrogen peroxide bleaching time, slurry concentration 8%～12%, 60～65 ℃ of temperature, pH value are controlled at 8.5～9, air dried pulp hydrogen peroxide consumption 20～30kg per ton; Float disposed slurry whiteness 22%～28% (ISO), beating consistency 2.5%～4.5%, beating degree 26～32
0SR, weight in wet base: 10.5～15g.DDS displacement cooking method is with reference to the production method of patent publication No. CN101100820A and Granted publication CN101100820B thereof.
One of improvement project of the basic production method and technology scheme that adopts as the present invention: use alkyl ketene dimer (AKD) neutral sizing agent in the condiment process; Its solid content is 14.5%～15.5%; Ton paper consumption is 10～14kg, and the pH value is 6.5～9.0 during applying glue.Can improve the heat resistance of abrasive base paper, improve the toughness of product, cut, broken end phenomenon appear in minimizing in the high temperature use.
Two of the improvement project of the basic production method and technology scheme that adopts as the present invention: the boiling Kappa number is preferred 40～45, can stabilize and increase the quality of product.
The invention has the beneficial effects as follows: since adopt DDS displacement cooking, oxonium base delignification, hydrogen peroxide bleaching, in dense technology; Reduced the energy consumption in the pulping process; (AOX) reaches the purpose of cleaner production with the generation of dioxin noxious material to have reduced discharged waste water and organohalogen compounds; Because of adopting DDS displacement cooking method, oxonium base delignification, hydrogen peroxide bleaching are produced little wood pulp that floats, and have improved the Kappa number and the paper pulp yield of slurry; Reduced in the production process damage to fiber; Improved the intensity of chemical pulp, thereby improved the physical strength of paper, under the prerequisite that keeps product high strength to require; Can mix part Eucalyptus raw material, enlarge the source of fibrous raw material; Adopt little wood pulp that floats, under the prerequisite that ensures paper physical intensity, can stablize the color of paper, improve the outward appearance of product.
The specific embodiment:
Embodiment 1:
With weight portion is that 70 masson pine, weight portion are 30 Eucalyptus; Through after getting the raw materials ready; Adopt DDS displacement cooking, sealing to wash the sulfate true qualities wood pulp that sieve series becomes Kappa number 48; Slurry is through the oxygen delignification hydrogen peroxide bleaching, 90 minutes oxygen delignification section time, slurry concentration 12%, 90 ℃ of temperature, oxygen pressure 1000Kpa, pH value 12, air dried pulp flow of oxygen 30kg per ton, sodium hydroxide concentration 35kg; 90 minutes bleachery slurry time of staying, slurry concentration 12%, 60 ℃ of temperature, with NaOH adjustment pH value to 9, air dried pulp hydrogen peroxide consumption 20kg per ton; The little pulp brightness that floats that obtains is 22% (ISO), and it is with slurry pulping to 32 after 2.5% that this slurry preparation is become concentration
0SR, weight in wet base 10.5 g; Slurry is desanding after diluting, and diluted slurry is to meeting the online concentration requirement, through pressurized screen fine screen, control online pH value 6.5; Use the applying glue of alkyl ketene dimer (AKD) neutral sizing agent; Its solid content is 14.5%, and a ton paper consumption is 10kg, through the moulding of paper machine, squeezing, drying, soft calendaring, batch, rewinding, be packaged into finished product.
Through test, the vertical tensile index of gained abrasive base paper is 82Nm/g, laterally tensile index is that 48Nm/g, folding are that 1070 times, lateral shrinkage are 3.5%, tightness is 0.8 g/cm
3, smoothness is that 20s, degree of sizing are 30 g/m
2, machine direction tensile strength is 8.1kN, cross direction tensile strength is 3.0 kN, paper color is brown, whiteness 19% (ISO), form and aspect: L value 65, a value 7.5, b value 21.
Embodiment 2:
With weight portion is that 80 masson pine, weight portion are 20 Eucalyptus; Through after getting the raw materials ready; Adopt DDS displacement cooking, sealing to wash the sulfate true qualities wood pulp that sieve series becomes Kappa number 38; Slurry is through the oxygen delignification hydrogen peroxide bleaching, and 60 minutes oxygen delignification section time, slurry concentration are 8%, temperature is 95 ℃, oxygen pressure 900Kpa, pH value 10, air dried pulp flow of oxygen 20kg per ton, sodium hydroxide concentration 20kg; 60 minutes bleachery slurry time of staying, slurry concentration 8%, 65 ℃ of temperature, with NaOH adjustment pH value to 8.5, air dried pulp hydrogen peroxide consumption 30kg per ton; The little pulp brightness that floats that obtains is 28% (ISO), and it is with slurry pulping to 26 after 4.5% that this slurry preparation is become concentration
0SR, weight in wet base 15 g; Slurry is desanding after diluting, and diluted slurry is to meeting the online concentration requirement, through pressurized screen fine screen, control online pH value 9.0; Use the applying glue of alkyl ketene dimer (AKD) neutral sizing agent; Its solid content is 15.5%, and a ton paper consumption is 14kg, through the moulding of paper machine, squeezing, drying, soft calendaring, batch, rewinding, be packaged into finished product.
Through test, the vertical tensile index of gained abrasive base paper is 87Nm/g, laterally tensile index is that 45Nm/g, folding are that 1030 times, lateral shrinkage are 2.9%, tightness is 0.78 g/cm
3, smoothness is that 15 s, degree of sizing are 20 g/m
2, machine direction tensile strength is 8.0kN, cross direction tensile strength is 3.0 kN, paper color is brown, whiteness 26% (ISO), form and aspect: L value 75, a value 3.5, b value 27.
Embodiment 3:
With weight portion is that 75 masson pine, weight portion are 25 Eucalyptus; Through after getting the raw materials ready; Adopt DDS displacement cooking, sealing to wash the sulfate true qualities wood pulp that sieve series becomes Kappa number 40; Slurry is through the oxygen delignification hydrogen peroxide bleaching, 75 minutes oxygen delignification section time, slurry concentration 10%, 93 ℃ of temperature, oxygen pressure 950Kpa, pH value 11, air dried pulp flow of oxygen 25kg per ton, sodium hydroxide concentration 30kg; 80 minutes bleachery slurry time of staying, slurry concentration 11%, 62 ℃ of temperature, with NaOH adjustment pH value to 8.7, air dried pulp hydrogen peroxide consumption 25kg per ton; The little pulp brightness that floats that obtains is 25% (ISO), and it is with slurry pulping to 29 after 4% that this slurry preparation is become concentration
0SR, weight in wet base 13 g; Slurry is desanding after diluting, and diluted slurry is to meeting the online concentration requirement, through pressurized screen fine screen, control online pH value 8; Use the applying glue of alkyl ketene dimer (AKD) neutral sizing agent; Its solid content is 15%, and a ton paper consumption is 12kg, through the moulding of paper machine, squeezing, drying, soft calendaring, batch, rewinding, be packaged into finished product.
Through test, the vertical tensile index of gained abrasive base paper is 83Nm/g, laterally tensile index is that 47Nm/g, folding are that 1100 times, lateral shrinkage are 3.2%, tightness is 0.79 g/cm
3, smoothness is that 17 s, degree of sizing are 28 g/m
2, machine direction tensile strength is 8.5kN, cross direction tensile strength is 3.2 kN, paper color is brown, whiteness 22% (ISO), form and aspect: L value 70, a value 5.1, b value 24.
Embodiment 4:
With weight portion is that 74 masson pine, weight portion are 24 Eucalyptus; Through after getting the raw materials ready; Adopt DDS displacement cooking, sealing to wash the sulfate true qualities wood pulp that sieve series becomes Kappa number 45; Slurry is through the oxygen delignification hydrogen peroxide bleaching, 80 minutes oxygen delignification section time, slurry concentration 11%, 94 ℃ of temperature, oxygen pressure 970Kpa, pH value 11.5, air dried pulp flow of oxygen 26kg per ton, sodium hydroxide concentration 32kg; 78 minutes bleachery slurry time of staying, slurry concentration 11.5%, 63 ℃ of temperature, with NaOH adjustment pH value to 9, air dried pulp hydrogen peroxide consumption 27kg per ton; The little pulp brightness that floats that obtains is 24% (ISO), and it is with slurry pulping to 29 after 3.5% that this slurry preparation is become concentration
0SR, weight in wet base 14g; Slurry is desanding after diluting, and diluted slurry is to meeting the online concentration requirement, through pressurized screen fine screen, control online pH value 8; Use the applying glue of alkyl ketene dimer (AKD) neutral sizing agent; Its solid content is 15%, and a ton paper consumption is 12.5kg, through the moulding of paper machine, squeezing, drying, soft calendaring, batch, rewinding, be packaged into finished product.
Through test, the vertical tensile index of gained abrasive base paper is 89Nm/g, laterally tensile index is that 50Nm/g, folding are that 1150 times, lateral shrinkage are 3.2%, tightness is 0.79 g/cm
3, smoothness is that 18 s, degree of sizing are 28 g/m
2, machine direction tensile strength is 8.4kN, cross direction tensile strength is 3.4 kN, paper color is brown, whiteness 22% (ISO), form and aspect: L value 70, a value 5.5, b value 25.
Embodiment 5:
With weight portion is that 75 masson pine, weight portion are 25 Eucalyptus; Through after getting the raw materials ready; Adopt DDS displacement cooking, sealing to wash the sulfate true qualities wood pulp that sieve series becomes Kappa number 43; Slurry is through the oxygen delignification hydrogen peroxide bleaching, 75 minutes oxygen delignification section time, slurry concentration 9%, 94 ℃ of temperature, oxygen pressure 980Kpa, pH value 11.5, air dried pulp flow of oxygen 26kg per ton, sodium hydroxide concentration 29kg; 80 minutes bleachery slurry time of staying, slurry concentration 11%, 64 ℃ of temperature, with NaOH adjustment pH value to 9, air dried pulp hydrogen peroxide consumption 27kg per ton; The little pulp brightness that floats that obtains is 26% (ISO), with this slurry preparation become concentration 4.2%, with slurry pulping to 28
0SR, weight in wet base 14.5g; Slurry is desanding after diluting, and diluted slurry is to meeting the online concentration requirement, through pressurized screen fine screen, control online pH value 7.5; Use the applying glue of alkyl ketene dimer (AKD) neutral sizing agent; Its solid content is 15.3%, and a ton paper consumption is 12.5kg, through the moulding of paper machine, squeezing, drying, soft calendaring, batch, rewinding, be packaged into finished product.
Through test, the vertical tensile index of gained abrasive base paper is 92Nm/g, laterally tensile index is that 48Nm/g, folding are that 1179 times, lateral shrinkage are 3.1%, tightness is 0.8 g/cm
3, smoothness is that 17S, degree of sizing are 27g/m
2, machine direction tensile strength is 8.6kN, cross direction tensile strength is 3.5 kN, paper color is brown, whiteness 23% (ISO), form and aspect: L value 71, a value 6, b value 24.
Conversion sizing agent in actual production process uses sizing agent and corresponding glue-applying techniques such as gum rosin, keeps the degree of sizing of product to be not more than 30 g/m
2, also can obtain corresponding qualified products.
The testing performance index method of relevant paper pulp or paper adopts the existing recommendatory method of testing standard of country to test among the present invention.
Obviously, the invention is not restricted to the above specific embodiment, also can in the spirit of claim of the present invention and specification qualification, change other process conditions, have same technique effect, so do not repeat.Those of ordinary skill in the art can all methods direct from content disclosed by the invention or that associate reach the product that is obtained by this method, as long as within the spirit that claim limits, also belong to protection scope of the present invention.
Claims (4)
1. abrasive base paper; It is characterized in that: the sulfate pulp that uses the Eucalyptus of masson pine, 20～30 weight portions of 70～80 weight portions to process is manufactured paper with pulp and is formed, and vertical tensile index of paper is not less than 80Nm/g, laterally tensile index is not less than 45Nm/g, folding and is not less than that 1000 times, lateral shrinkage are not more than 3.5%, tightness is not less than 0.78 g/cm
3, smoothness is not less than 15 s, degree of sizing is not more than 30 g/m
2, machine direction tensile strength is not less than 8.0kN, cross direction tensile strength is not less than 3.0 kN, paper color is brown, whiteness 19%～26%, form and aspect: L value 65～75, a value 3.5～7.5, b value 21～27.
2. production method of producing the said abrasive base paper of claim 1; The Eucalyptus of the masson pine of 70～80 weight portions, 20～30 weight portions; Through the DDS displacement cooking, wash sieve, oxonium base delignification, hydrogen peroxide bleaching and process the little wood pulp that floats of sulfate; Slurry through making beating, desanding, condiment, pressurized screen fine screen, go up net forming, squeezing, drying, soft calendaring, batch, rewinding, packing form, it is characterized in that: the boiling Kappa number is 38～48; 60～90 minutes oxonium base delignification time, slurry concentration 8%～12%, 90～95 ℃ of temperature, oxygen pressure 900～1000Kpa, pH value 10～12, air dried pulp flow of oxygen 20～30kg per ton, sodium hydroxide concentration 20～35kg; 60～90 minutes hydrogen peroxide bleaching time, slurry concentration 8%～12%, 60～65 ℃ of temperature, pH value are controlled at 8.5～9, air dried pulp hydrogen peroxide consumption 20～30kg per ton; Float disposed slurry whiteness 22%～28%; Beating consistency 2.5%～4.5%, beating degree 26～32
0SR, weight in wet base: 10.5～15g.
3. according to the production method of the said abrasive base paper of claim 2, it is characterized in that: the use solid content is 14.5%～15.5% alkyl ketene dimer (AKD) neutral sizing agent in the condiment process, and a ton paper consumption is 10～14kg, and the pH value is 6.5～9.0 during applying glue.
4. according to the production method of the said abrasive base paper of claim 2, it is characterized in that: said boiling Kappa number is 40～45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101087973A CN102154899B (en) | 2011-04-28 | 2011-04-28 | Base paper of sandpaper and production method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101087973A CN102154899B (en) | 2011-04-28 | 2011-04-28 | Base paper of sandpaper and production method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102154899A CN102154899A (en) | 2011-08-17 |
| CN102154899B true CN102154899B (en) | 2012-05-23 |
Family
ID=44436557
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101087973A Active CN102154899B (en) | 2011-04-28 | 2011-04-28 | Base paper of sandpaper and production method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102154899B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102561092B (en) * | 2012-01-18 | 2014-06-18 | 永州湘江纸业有限责任公司 | Anti-rust base paper and production method thereof |
| CN105297526B (en) * | 2015-11-03 | 2017-05-24 | 山东鲁南新材料股份有限公司 | Water-resistant abrasive base paper and production method thereof |
| CN108277695B (en) * | 2018-04-08 | 2020-06-12 | 岳阳林纸股份有限公司 | Method for manufacturing frosted base paper |
| CN108755258A (en) * | 2018-06-15 | 2018-11-06 | 台州市玫瑰纸业股份有限公司 | A kind of abrasive base paper and preparation method thereof |
| CN109957993A (en) * | 2019-02-20 | 2019-07-02 | 常州苏达欧包装材料有限公司 | A kind of waterproof tensile stretches abrasive base paper |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2584460B2 (en) * | 1987-10-26 | 1997-02-26 | 三菱製紙株式会社 | Method for producing matte coated paper for gravure printing |
| JP3865506B2 (en) * | 1997-09-08 | 2007-01-10 | ユニ・チャーム株式会社 | Water-decomposable fiber sheet containing fibers with different fiber lengths |
| DE102006027006A1 (en) * | 2006-06-08 | 2007-12-13 | Voith Patent Gmbh | Producing fibrous material comprises producing a chemical solution, mixing the chemical solution with wood and/or annual plant; heating the chemical solution and pulping and then separating the woods and the chemical solution |
| BRPI0718883A2 (en) * | 2006-12-23 | 2014-02-18 | Voith Patent Gmbh | Silk Paper Production Process |
| CN101210404B (en) * | 2006-12-25 | 2011-04-27 | 王金夫 | Fuel oil filter paper and producing technique thereof |
| CN100510250C (en) * | 2007-01-29 | 2009-07-08 | 永州湘江纸业有限责任公司 | Method of producing composite base paper |
-
2011
- 2011-04-28 CN CN2011101087973A patent/CN102154899B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102154899A (en) | 2011-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100585073C (en) | High performance wall paper base paper pulp and process for manufacturing the wall paper base paper using the pulp | |
| CN108330720B (en) | Special decorative base paper for ecological plate and preparation method thereof | |
| CN102154899B (en) | Base paper of sandpaper and production method thereof | |
| CN111270561B (en) | High-whiteness yellowing-resistant coated white cardboard and preparation method thereof | |
| CN109629286B (en) | Preparation process of kraft liner cardboard paper | |
| CN103614949A (en) | High-permeability super black decorated base paper and preparation method thereof | |
| CN102605671A (en) | Production method of art paper containing crude fibers | |
| CN105155333A (en) | Manufacturing method of top-grade ivory white offset printing paper | |
| CN110820413A (en) | Wear-resistant waterproof bobbin paper and preparation method thereof | |
| CN108130818A (en) | A kind of preparation method of double-colored grease proofing antibacterial food wrapping paper | |
| CN104499344B (en) | The manufacturing process of composite kraft paper | |
| CN108130789A (en) | A kind of production technology for preventing the quick-fried line of boxboard | |
| CN109667197A (en) | High tenacity nonwoven coats paper and preparation method thereof | |
| CN102251431A (en) | Method for producing colored knitting paper for handicraft articles by using mixed bamboo and wood pulp | |
| CN105133416A (en) | Natural original-color high-breathability moulded paper and preparation method thereof | |
| CN109629316A (en) | High-resolution high bulk abrasion-proof paper and preparation method thereof | |
| CN102493258A (en) | Woodfree writing paper and production method thereof | |
| CN100497822C (en) | Surface layer abrasion-proof paper | |
| CN102041744B (en) | Tape base paper and production method thereof | |
| CN102517979B (en) | Dalle body paper and making method thereof | |
| CN108277695B (en) | Method for manufacturing frosted base paper | |
| CN106868925A (en) | A kind of high-strength filler paper high and preparation method thereof | |
| CN105696424B (en) | Imitative stone manufacture craft and products thereof | |
| CN105672044A (en) | Manufacturing method of cigar slice coat | |
| CN104313934A (en) | Moisture-proof highly-breathable non-woven wallpaper and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200518 Address after: No.1, Guangming Road, Chenglingji, Yueyanglou District, Yueyang City, Hunan Province Patentee after: YUEYANG PAPER Co.,Ltd. Address before: 425000, No. 105 down river line, Lengshuitan District, Hunan, Yongzhou Patentee before: YONGZHOU XIANGJIANG RIVER PAPER Co.,Ltd. |
|
| TR01 | Transfer of patent right |