CN103114503A - Nickel-plated carbon fiber shielding paper and preparation method thereof - Google Patents
Nickel-plated carbon fiber shielding paper and preparation method thereof Download PDFInfo
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Abstract
The invention discloses nickel-plated carbon fiber shielding paper and a preparation method thereof. The preparation method comprises the following process steps: firstly, preparing nickel-plated carbon fibers, preparing a bleached wood pulp, and after the nickel-plated carbon fibers are chopped, adding the chopped nickel-plated carbon fibers into the bleached wood pulp to mix according to a volume fraction of 5-30%; and then, adding a dispersant into the obtained mixture to carry out aqueous phase dispersion, carrying out papermaking on the dispersed mixed pulp, and squeezing and drying the obtained product so as to obtain nickel-plated carbon fiber shielding paper. Through preparing shielding paper by using nickel-plated carbon fibers, the electrical conductivity of the shielding paper is better than that of a common carbon fiber shielding paper, the electromagnetic shielding effect is better, and the shielding effectiveness of the shielding paper in a high-frequency area is similar to that of a conductive fabric, therefore, the shielding paper is suitable for being applied to occasions with stricter requirements on shielding effectiveness. Meanwhile, the strength of the nickel-plated carbon fiber shielding paper disclosed by the invention is higher than that of a common carbon fiber paper, and the comprehensive performance of the shielding paper is more excellent, therefore, the shielding paper accords with the requirements of high-performance materials.
Description
Technical field
The present invention relates to papermaking, shield technology, composite crossing domain, relate in particular to a kind of nickel-coated carbon fibers shielding paper and preparation method thereof.
Background technology
The property class of common carbon fibers is similar to metal, is a kind of good conductor.Existing research is found, the conductive shield paper that carbon fiber and string are manufactured paper with pulp has certain shielding properties, at the shield effectiveness at 100KHz ~ 1500MHz place all greater than 30dB, reach as high as 50dB, can be fit to the radiation proof of general business or electronic product and the application of electrostatic interference, but the electric conductivity of common carbon fibers paper is not high, and its shield effectiveness can not satisfy the stricter occasion of shielding requirements.And it is larger that the paper strength of common carbon fibers paper is affected by the carbon fiber interpolation, causes its mechanical properties decrease obvious, and in addition, common carbon fibers paper does not relate to the consideration of waterproof fireproofing, is not suitable for the application requirements of some special occasions, has limited its range of application.
Therefore, prior art has yet to be improved and developed.
Summary of the invention
In view of above-mentioned the deficiencies in the prior art, the object of the present invention is to provide a kind of nickel-coated carbon fibers shielding paper and preparation method thereof, be intended to solve present common carbon fibers paper shielding properties limited, the problem that range of application is narrow.
Technical scheme of the present invention is as follows:
A kind of preparation method of nickel-coated carbon fibers shielding paper wherein, comprises the following steps:
A, preparation nickel-coated carbon fibers;
B, preparation bleached wood pulp and nickel-coated carbon fibers is chopped after join in bleached wood pulp according to the volume fraction of 5-30% and mix, then add dispersant to carry out water and disperse;
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.
The preparation method of described nickel-coated carbon fibers shielding paper, wherein, described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, current density is 100 mA/dm
2, electroplating time 6 ~ 10 min.
The preparation method of described nickel-coated carbon fibers shielding paper, wherein, the beating degree of described bleached wood pulp is 35 ~ 45 ° of SR, the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm.
The preparation method of described nickel-coated carbon fibers shielding paper, wherein, described dispersant is APAM, adds in mixed slurry according to 1% volume fraction.
The preparation method of described nickel-coated carbon fibers shielding paper, wherein, described step C is specially: described mixed slurry is copied after paper squeezing time 40 ~ 110s under hydraulic press 4Mpa, and at 90 ~ 100 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 3 ~ 4 minutes.
The preparation method of described nickel-coated carbon fibers shielding paper, wherein, the volume fraction according to 10% or 15% or 20% or 25% after described nickel-coated carbon fibers is chopped joins in bleached wood pulp.
A kind of nickel-coated carbon fibers shielding paper, wherein, the preparation method of nickel-coated carbon fibers shielding paper makes finished product as described above.
Described nickel-coated carbon fibers shielding paper, wherein, described nickel-coated carbon fibers shielding paper weight is 25 ~ 200g/m
2
Described nickel-coated carbon fibers shielding paper, wherein, described nickel-coated carbon fibers shielding paper at the shield effectiveness of 30MHz ~ 18GHz at 25dB-75dB.
Beneficial effect: the invention provides a kind of nickel-coated carbon fibers shielding paper and preparation method thereof, make its electric conductivity more excellent than common carbon fibers shielding paper by using nickel-coated carbon fibers to prepare shielding paper, effectiveness is better, shield effectiveness and conductive fabric at high frequency region are similar, are fit to require tighter occasion to use to shield effectiveness.And, the strength ratio common carbon fibers paper of nickel-coated carbon fibers shielding paper of the present invention higher, combination property is better, meets the requirement of high performance material.
Description of drawings
Fig. 1 is preparation method's flow chart of nickel-coated carbon fibers shielding paper of the present invention.
The specific embodiment
The invention provides a kind of nickel-coated carbon fibers shielding paper and preparation method thereof, clearer, clear and definite for making purpose of the present invention, technical scheme and effect, below the present invention is described in more detail.Should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
The preparation method of a kind of nickel-coated carbon fibers shielding paper as shown in Figure 1 wherein, comprises the following steps:
A, preparation nickel-coated carbon fibers.Described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, the technological process of electronickelling be carbon fiber → surface remove photoresist → wash → electroplate → wash → dry, by Method of burning of high temperature, carbon fiber is put into 400 ℃ of calcination 5 min of muffle furnace, remove the organic binder bond of carbon fiber surface.The electroplating current density is 100 mA/dm
2, electroplating time 6 min, the pH value is 3-4,25 ℃ of temperature, the use nickelous sulfate is main salt, and boric acid is as buffer, and nickel chloride adds dodecyl sodium sulfate simultaneously for anti-passivator, and nickel coating thickness is 0.2-0.6 μ m.in addition, in order further to improve the electric conductivity of carbon fiber, can be chosen in and adopt the secondary depositing process on carbon fiber, namely can first copper facing on carbon fiber, and then nickel plating, obtain the carbon fiber of the two coating of Cu-Ni, carbon fiber surface plating Cu, Ni respectively has advantage, copper has good electric conductivity and electromagnetic wave shielding, but copper easy-to-rust, though the electric conductivity of nickel is not as copper, but nickel is anti-corrosion, can protect internal copper layer to exempt from oxidation, therefore not only further improved the conductive capability of material at the two coating of carbon fiber surface plating Cu-Ni, copper coating is difficult for oxidized, simultaneously the combination of carbon fiber and copper coating is strengthened, improve the mechanical property of material.
B, preparation bleached wood pulp, the beating degree of bleached wood pulp is 35 ~ 45 ° of SR, and the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm, and described dispersant is APAM, and the volume fraction by 1% joins in mixed slurry.The chopped rear volume fraction according to 5-30% of nickel-coated carbon fibers is joined in bleached wood pulp mix, then adding dispersant to carry out water disperses, better, the chopped rear volume fraction according to 10% or 15% or 20% or 25% of described nickel-coated carbon fibers can be joined in bleached wood pulp and mix.
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.Described mixed slurry is copied after paper squeezing time 60 ~ 110s under hydraulic press 4Mpa, and at 90 ~ 100 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 3 ~ 4 minutes.
Utilize the preparation method of nickel-coated carbon fibers shielding paper as above to make finished product.Described nickel-coated carbon fibers shielding paper weight is 25 ~ 200g/m
2, general, the weight of prepared nickel-coated carbon fibers shielding paper is 60 g/m
2Described nickel-coated carbon fibers shielding paper at the shield effectiveness of 30MHz ~ 18GHz at 25dB-75dB.
Embodiment 1
A kind of preparation method of nickel-coated carbon fibers shielding paper wherein, comprises the following steps:
A, preparation nickel-coated carbon fibers.Described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, the technological process of electronickelling be carbon fiber → surface remove photoresist → wash → electroplate → wash → dry, by Method of burning of high temperature, carbon fiber is put into 400 ℃ of calcination 5 min of muffle furnace, remove the organic binder bond of carbon fiber surface.The electroplating current density is 100 mA/dm
2, electroplating time 6 min, the pH value is 4, uses nickelous sulfate 270g/L, boric acid 40g/L, nickel chloride 70g/L.Also need add dodecyl sodium sulfate 0.1g/L simultaneously, pH value 3-4,25 ℃ of temperature, nickel coating thickness is 0.4 μ m.
B, preparation bleached wood pulp, the beating degree of bleached wood pulp is 38 ° of SR, and the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm, and described dispersant is APAM, adds by 1% volume fraction consumption.The chopped rear volume fraction according to 10% of nickel-coated carbon fibers is joined in bleached wood pulp mix, then add dispersant to carry out water and disperse.
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.Described mixed slurry squeezes time 60s after copying paper under hydraulic press 4Mpa, at 90 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 4 minutes.
Utilize the preparation method of nickel-coated carbon fibers shielding paper as above to make finished product.Described nickel-coated carbon fibers shielding paper weight is 60g/m
2
Embodiment 2
A kind of preparation method of nickel-coated carbon fibers shielding paper wherein, comprises the following steps:
A, preparation nickel-coated carbon fibers.Described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, the technological process of electronickelling be carbon fiber → surface remove photoresist → wash → electroplate → wash → dry, by Method of burning of high temperature, carbon fiber is put into 400 ℃ of calcination 5 min of muffle furnace, remove the organic binder bond of carbon fiber surface.The electroplating current density is 100 mA/dm
2, electroplating time 8 min, the pH value is 4, uses nickelous sulfate 280g/L, boric acid is made 45g/L, nickel chloride 70g/L.Add simultaneously dodecyl sodium sulfate 0.1g/L, pH value 4,25 ℃ of temperature, nickel coating thickness is 0.5 μ m.
B, preparation bleached wood pulp, the beating degree of bleached wood pulp is 38 ° of SR, and the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm, and described dispersant is APAM, adds the amount of 1% volume fraction ...The chopped rear volume fraction according to 15% of nickel-coated carbon fibers is joined in bleached wood pulp mix, then add dispersant to carry out water and disperse.
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.Described mixed slurry squeezes time 80s after copying paper under hydraulic press 4Mpa, at 95 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 4 minutes.
Utilize the preparation method of nickel-coated carbon fibers shielding paper as above to make finished product.Described nickel-coated carbon fibers shielding paper weight is 60g/m
2
Embodiment 3
A kind of preparation method of nickel-coated carbon fibers shielding paper wherein, comprises the following steps:
A, preparation nickel-coated carbon fibers.Described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, the technological process of electronickelling be carbon fiber → surface remove photoresist → wash → electroplate → wash → dry, by Method of burning of high temperature, carbon fiber is put into 400 ℃ of calcination 5 min of muffle furnace, remove the organic binder bond of carbon fiber surface.The electroplating current density is 100 mA/dm
2, electroplating time 8 min, the pH value is 4, uses nickelous sulfate 270g/L, boric acid 40g/L, nickel chloride 70g/L adds dodecyl sodium sulfate 0.1g/L simultaneously, pH value 4,25 ℃ of temperature, nickel coating thickness is 0.5 μ m
B, preparation bleached wood pulp, the beating degree of bleached wood pulp is 35 ° of SR, and the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm, and described dispersant is APAM, adds by 1% volume fraction consumption.The chopped rear volume fraction according to 20% of nickel-coated carbon fibers is joined in bleached wood pulp mix, then add dispersant to carry out water and disperse.
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.Described mixed slurry squeezes time 90s after copying paper under hydraulic press 4Mpa, at 98 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 3 minutes.
Utilize the preparation method of nickel-coated carbon fibers shielding paper as above to make finished product.Described nickel-coated carbon fibers shielding paper weight is 70g/m
2
Embodiment 4
A kind of preparation method of nickel-coated carbon fibers shielding paper wherein, comprises the following steps:
A, preparation nickel-coated carbon fibers.Described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, the technological process of electronickelling be carbon fiber → surface remove photoresist → wash → electroplate → wash → dry, by Method of burning of high temperature, carbon fiber is put into 400 ℃ of calcination 5 min of muffle furnace, remove the organic binder bond of carbon fiber surface.The electroplating current density is 100 mA/dm
2, electroplating time 10 min, the pH value is 4, uses nickelous sulfate 270g/L, boric acid 30g/L, nickel chloride 60g/L.Add simultaneously dodecyl sodium sulfate 0.1g/L, pH value 4,25 ℃ of temperature, nickel coating thickness is 0.6 μ m
B, preparation bleached wood pulp, the beating degree of bleached wood pulp is 40 ° of SR, and the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm, and described dispersant is APAM, adds by 1% volume fraction.The chopped rear volume fraction according to 25% of nickel-coated carbon fibers is joined in bleached wood pulp mix, then add dispersant to carry out water and disperse.
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.Described mixed slurry squeezes time 100s after copying paper under hydraulic press 4Mpa, at 100 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 3 minutes.
Utilize the preparation method of nickel-coated carbon fibers shielding paper as above to make finished product.Described nickel-coated carbon fibers shielding paper weight is 100g/m
2
Embodiment 5
A kind of preparation method of nickel-coated carbon fibers shielding paper wherein, comprises the following steps:
A, preparation nickel-coated carbon fibers.Described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, the technological process of electronickelling be carbon fiber → surface remove photoresist → wash → electroplate → wash → dry, by Method of burning of high temperature, carbon fiber is put into 400 ℃ of calcination 5 min of muffle furnace, remove the organic binder bond of carbon fiber surface.The electroplating current density is 100 mA/dm
2, electroplating time 6 min, the pH value is 4, uses nickelous sulfate 280g/L, boric acid 40g/L, nickel chloride 90g/L adds dodecyl sodium sulfate 0.1g/L simultaneously, pH value 4,25 ℃ of temperature, nickel coating thickness is 0.4 μ m
B, preparation bleached wood pulp, the beating degree of bleached wood pulp is 45 ° of SR, and the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm, and described dispersant is APAM, adds by 1% volume fraction.The chopped rear volume fraction according to 30% of nickel-coated carbon fibers is joined in bleached wood pulp mix, then add dispersant to carry out water and disperse.
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.Described mixed slurry squeezes time 110s after copying paper under hydraulic press 4Mpa, at 98 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 3 minutes.Utilize the preparation method of nickel-coated carbon fibers shielding paper as above to make finished product.Described nickel-coated carbon fibers shielding paper weight is 150g/m
2
Utilize conllinear four probe method film surface resistance meter to carry out resistance test to above-mentioned made nickel-coated carbon fibers shielding paper sample, the result of surveying is as shown in table 1, thereby can find out that its sheet resistance of increase along with nickel-coated carbon fibers content first reduces rear increase, the nickel-coated carbon fibers shielding paper sample surfaces resistance of each content of testing is all at 3.5 Ω/m
2Below, Z axis resistance is all below 5 Ω .cm.The resistance minimum is 0.478 Ω when nickel-coated carbon fibers content is 20%, and Z axis resistance resistance when 20% content is also less simultaneously, and namely the shielding paper electric conductivity of fiber content 20% is best.
Table 1 nickel-coated carbon fibers shielding paper resistance measurement
Sample | 10% | 15% | 20% | 25% | 30% | The plain weave conductive fabric | The check conductive fabric |
Sheet resistance (Ω) | 3.196 | 0.951 | 0.487 | 0.745 | 1.292 | 0.025 | 0.016 |
Z axis resistance (Ω) | 4.82 | 0.41 | 0.55 | 1.04 | 1.28 | 0.007 | 0.004 |
Nickel-coated carbon fibers shielding paper of the present invention is carried out extension test testing its intensity, test result such as table 2, result shows, its tensile strength is minimum when nickel-coated carbon fibers content 20%.
Table 2 nickel-coated carbon fibers shielding paper tensile strength test result
Sample | 10% | 20% | 30% |
TENSILE STRENGTH (MPa) | 0.0676 | 0.0362 | 0.103 |
Maximum, force (N) | 15.13 | 9.85 | 25.09 |
Nickel-coated carbon fibers shielding paper of the present invention is carried out the shield effectiveness test, and carried out shielding paper stack test of the same type, test condition: 9KHz-8.5GHz, the shield effectiveness dynamic range is in 90dB.Result shows, increase along with nickel-coated carbon fibers content, nickel-coated carbon fibers shielding paper shielding properties of the present invention changes little, totally between 25-60dB, affected by wave frequency large and higher at the high frequency region shield effectiveness, especially be 20% to have the highest shield effectiveness at nickel-coated carbon fibers content, stack paper shield effectiveness is better than individual.At high frequency region, the shield effectiveness of nickel-coated carbon fibers shielding paper of the present invention and conductive fabric is suitable in addition.
The invention provides a kind of nickel-coated carbon fibers shielding paper and preparation method thereof, make its electric conductivity more excellent than common carbon fibers shielding paper by using nickel-coated carbon fibers to prepare shielding paper, effectiveness is better, at the shield effectiveness at 30MHz ~ 18GHz place all greater than 25dB, reach as high as 75dB, similar at shield effectiveness and the conductive fabric of high frequency region, be fit to require tighter occasion to use to shield effectiveness.As preventing the shielding wallpaper of information leakage, the conductive fabric that substitutes anti-electromagnetic interference, radiation-resistant packaging material etc., Application Areas is more wide.And, the strength ratio common carbon fibers paper of nickel-coated carbon fibers shielding paper of the present invention higher, combination property is better, meets the requirement of high performance material.
Should be understood that, application of the present invention is not limited to above-mentioned giving an example, and for those of ordinary skills, can be improved according to the above description or conversion, and all these improve and conversion all should belong to the protection domain of claims of the present invention.
Claims (9)
1. the preparation method of a nickel-coated carbon fibers shielding paper, is characterized in that, comprises the following steps:
A, preparation nickel-coated carbon fibers;
B, preparation bleached wood pulp and nickel-coated carbon fibers is chopped after join in bleached wood pulp according to the volume fraction of 5-30% and mix, then add dispersant to carry out water and disperse;
C, after being copied paper and squeeze drying, scattered mixed slurry obtains the nickel-coated carbon fibers shielding paper.
2. the preparation method of nickel-coated carbon fibers shielding paper according to claim 1, is characterized in that, described nickel-coated carbon fibers is to form by carry out electronickelling at carbon fiber surface, and current density is 100 mA/dm
2, electroplating time 6 ~ 10 min.
3. the preparation method of nickel-coated carbon fibers shielding paper according to claim 1, is characterized in that, the beating degree of described bleached wood pulp is 35 ~ 45 ° of SR, and the length after described nickel-coated carbon fibers is chopped is 2 ~ 6mm.
4. the preparation method of nickel-coated carbon fibers shielding paper according to claim 1, is characterized in that, described dispersant is APAM, adds in mixed slurry according to 1% volume fraction.
5. the preparation method of nickel-coated carbon fibers shielding paper according to claim 1, it is characterized in that, described step C is specially: described mixed slurry is copied after paper squeezing time 60 ~ 110s under hydraulic press 4Mpa, and at 90 ~ 100 ℃ of temperature, vacuumize obtains the nickel-coated carbon fibers shielding paper after 3 ~ 4 minutes.
6. the preparation method of nickel-coated carbon fibers shielding paper according to claim 1, is characterized in that, the volume fraction according to 10% or 15% or 20% or 25% after described nickel-coated carbon fibers is chopped joins in bleached wood pulp.
7. a nickel-coated carbon fibers shielding paper, is characterized in that, makes finished product according to the preparation method as the described nickel-coated carbon fibers shielding paper of claim 1-6 any one.
8. nickel-coated carbon fibers shielding paper according to claim 7, is characterized in that, described nickel-coated carbon fibers shielding paper weight is 25 ~ 200g/m
2
9. nickel-coated carbon fibers shielding paper according to claim 7, is characterized in that, described nickel-coated carbon fibers shielding paper at the shield effectiveness of 30MHz ~ 18GHz at 25dB-75dB.
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Cited By (5)
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CN108070888A (en) * | 2017-12-18 | 2018-05-25 | 常德力元新材料有限责任公司 | A kind of electro-plating method of electromagnetic shielding material |
CN108312680A (en) * | 2018-03-27 | 2018-07-24 | 华南理工大学 | A kind of lamination high property superthin electromagnetic wave shield film and preparation method thereof |
CN112411008A (en) * | 2020-11-14 | 2021-02-26 | 南京柯普新材料科技有限公司 | Preparation process of nickel-plated carbon fiber felt |
CN113215630A (en) * | 2021-04-21 | 2021-08-06 | 飞荣达科技(江苏)有限公司 | High-performance carbon fiber and electroplating method thereof |
CN114808521A (en) * | 2022-04-20 | 2022-07-29 | 江南大学 | Method for preparing electrode precursor by using copper-plated carbon fiber papermaking |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108070888A (en) * | 2017-12-18 | 2018-05-25 | 常德力元新材料有限责任公司 | A kind of electro-plating method of electromagnetic shielding material |
CN108312680A (en) * | 2018-03-27 | 2018-07-24 | 华南理工大学 | A kind of lamination high property superthin electromagnetic wave shield film and preparation method thereof |
CN112411008A (en) * | 2020-11-14 | 2021-02-26 | 南京柯普新材料科技有限公司 | Preparation process of nickel-plated carbon fiber felt |
CN112411008B (en) * | 2020-11-14 | 2021-06-04 | 南京柯普新材料科技有限公司 | Preparation process of nickel-plated carbon fiber felt |
CN113215630A (en) * | 2021-04-21 | 2021-08-06 | 飞荣达科技(江苏)有限公司 | High-performance carbon fiber and electroplating method thereof |
CN114808521A (en) * | 2022-04-20 | 2022-07-29 | 江南大学 | Method for preparing electrode precursor by using copper-plated carbon fiber papermaking |
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