CN105887540A - Process method for producing carbon-free copying base paper by using white scrap paper - Google Patents
Process method for producing carbon-free copying base paper by using white scrap paper Download PDFInfo
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- CN105887540A CN105887540A CN201410645768.4A CN201410645768A CN105887540A CN 105887540 A CN105887540 A CN 105887540A CN 201410645768 A CN201410645768 A CN 201410645768A CN 105887540 A CN105887540 A CN 105887540A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
Abstract
The invention discloses a process method for producing carbon-free copying base paper by using white scrap paper. The process method comprises the following steps: (a) carrying out raw material selecting; (b) carrying out scrap paper pulping; (c) carrying out pulping; (d) carrying out adjuvant adding; (e) carrying out booming forming; (f) carrying out squeezing; (g) carrying out drying; (h) carrying out calendering; (i) carrying out slitting; and (j) carrying out packaging. The process method has the beneficial effects that the energy consumption is low, and the cost is low.
Description
Technical field
The present invention relates to the manufacturing technology of a kind of carbonless copy base paper, particularly one make
Carbon-free unfired brick process is produced with white waste paper.
Background technology
Carbon-free unfired brick to have certain flexibility and deflection, is beneficial to manifolding；Have good
Degree of sizing, color layer and microcapsule layer can be had good buffer action；Have the most smooth
Degree and glossiness；Having the most dry, wet strength, green deformation is little；Should there is not dark dust and convex
The impurity gone out.Therefore carbon-free unfired brick is coated with former in quality and the requirement of quantitative aspect than other
Paper is tightened up.Owing to paper outward appearance, intensity, quantitative requirement are high, therefore carbon-free unfired brick
Produce and typically all use 100% primary bleached bamboo pulp or bleached wood pulp to produce, but chemical pulping,
Bleach big for environment pollution, and production cost is high.
Summary of the invention
The invention aims to solve the problems referred to above, devise the white waste paper of a kind of use and produce
Carbon-free unfired brick process.
Realizing above-mentioned purpose the technical scheme is that, the white waste paper of a kind of use produces carbon-free multiple
Write body paper process, 1, a kind of use white waste paper to produce carbon-free unfired brick process, its
Being characterised by, this process comprises the steps:
A, choose raw material, choose waste and old blank sheet of paper as raw material；
B, waste paper pulp-making, utilize to purify and screen the raw material described in step a with screening installation,
The raw material of step a, after the size degradation of D type pulper, by HC Cleaner, removes former
Bigger heavy slag in material；The good slurry of gained enters one section of scalping, removes the shape in raw material bigger
Plastic sheet, foam, micelle etc., the good slurry of gained enters scummer system, and gained tail slurry enters
Flotation smoothing machine, removes plastic sheet, thin film, foam etc. and reclaims good slurry therein；After scalping
Good starch into scummer system, by five sections of scummers of one-level, remove the grains of sand in raw material, thin
Little slag particle etc.；The good slurry of gained enters screening system, by the fine screen of one-level three sections, removes slurry
In the less plastic sheet of shape, micelle etc.；The good slurry of gained enters many disk filters, passes through
After washing, concentration, gained pulping goes to starch tower storage；
C, making beating, carry out making beating process by mill to above-mentioned wastepaper as raw material, and mill can be selected for D
Type abrasive disc, cutting action to fiber during to reduce making beating；
D adjuvant adds, and the slurry described in step c is carried out applying glue by dosing pump, is added and brighten
Agent, interpolation wet strength agent；
E, streaming shape, and the paper pulp prepared is sent into online approach system, and making in step d
The web part of paper machine of paper machine makes l Water Paper page；
F, squeezing, the l Water Paper page preparing step e squeezes, and wet web carries out press dewatering,
Improve paper strength, less dry energy resource consumption；
G, being dried, after squeezing step f, the page that obtains enters drying section, obtains dried
Page；
H, press polish, carry out press polish pressure process to the above-mentioned page through being dried, and makes into paper surface and puts down
Slippery reaches to use requirement；
I, cut, cut through calendered page above-mentioned, make and meet regulation
Paper roll；
J, packaging, by bundled for above-mentioned paper wrapping paper packaging.
Purification and screening installation in described step b can choose the excellent purification of DLK line and screening
Equipment, the scalping of preferable UV300 model, the fine screen of UV500 model.
The mill disc of the mill optional D model in described step c.
Adjuvant in described step d adds equipment, can be selected for diaphragm metering pump.
Described step e is sizing agent consumption to be strengthened and the consumption of wet strength agent during preparing page, executes
The consumption of colloid is original 1.5 times, and the consumption of wet strength agent is original 1.5 times.
The white waste paper of use utilizing technical scheme to make produces carbon-free unfired brick technique
Method, environmental pollution and the energy that when can not only reduce slurrying, the operation such as steaming and decocting, bleaching is brought disappear
Consumption problem, and use regenerated papermaking, it is also possible to achieve the recycling of resource, significantly drop
Low production cost, product per ton reduces cost about 1000 yuan, has the most economical and social
Benefit.
Accompanying drawing explanation
Fig. 1 is the flow process that the white waste paper of use of the present invention produces carbon-free unfired brick process
Schematic diagram.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is specifically described, if Fig. 1 is use of the present invention
White waste paper produces the schematic flow sheet of carbon-free unfired brick process, as it can be seen, one makes
With white waste paper produce carbon-free unfired brick process, this process comprise the steps: a,
Choose raw material, choose waste and old blank sheet of paper as raw material；B, waste paper pulp-making, utilize and purify and screening
Raw material described in step a is screened by equipment, remove the wax point in wastepaper as raw material, plastic sheet,
The impurity such as the grains of sand；C, making beating, processed above-mentioned wastepaper as raw material making beating by mill, and then obtain
Meet the sizing material of expectation index；D, adjuvant add, by dosing pump to the slurry described in step c
Carry out applying glue, add brightening agent, interpolation wet strength agent；E, papermaking page, by prepare in step d
Online approach system sent into by paper pulp, and makes l Water Paper page at the web part of paper machine of paper machine；F, squeezing,
The l Water Paper page preparing step e squeezes, and wet web carries out press dewatering, improves into paper strong
Degree, less dry energy resource consumption；G, being dried, after squeezing step f, the page that obtains enters dry
Dry portion, obtains dried page；H, press polish, carry out press polish to the above-mentioned page through being dried
Pressure processes, and makes into paper surface smoothness and reaches to use requirement；I, cut, to above-mentioned through press polish
The page that pressure processes is cut, and makes the paper meeting regulation；J, packaging, by above-mentioned paper
Pack bundled with wrapping paper.Wherein, the purification in described step b and screening installation can choose DLK
Purification that line is excellent and screening installation, the scalping of preferable UV300 model, the essence of UV500 model
Sieve；The abrasive disc of the mill optional D model in described step c；Adjuvant in described step d adds
Oil (gas) filling device, can be selected for diaphragm metering pump；Described step e to strengthen during preparing page and execute
Colloid consumption and the consumption of wet strength agent, the consumption of sizing agent is original 1.5 times, wet strength agent
Consumption is original 1.5 times.
Please describe in actual production process, operator are how to control technique described in this technology
The operating process of step.Such as:
Embodiment 1
A chooses raw material and chooses not through printing, and whiteness is not less than the wood-free paper limit of 70%, double
Gummed paper limit should not contain the carbonless paper after coating, unbleached paper；
B waste paper pulp-making, by the raw material selected by step a, puts into D type pulping continuously, equably
Machine, after size degradation, by HC Cleaner, every 30min opens the Ji Zhajing of HC Cleaner,
Discharge the bigger heavy slag in raw material；The good slurry of gained enters one section of scalping, removes the shape in raw material
Plastic sheet that shape is bigger, foam, micelle etc., the good slurry of gained enters scummer system, gained tail
Oar is entered flotation smoothing machine, discharges tailings plastic sheet, thin film, foam etc. and also reclaims therein good
Slurry；Good slurry after scalping is entered scummer system, by five sections of scummers of one-level, removes raw material
In the grains of sand, tiny slag particle etc.；The good slurry of gained enters screening system, by the essence of one-level three sections
Sieve, removes the less plastic sheet of the shape in slurry, micelle etc.；The good slurry of gained enters many disks
Filter, after washing, concentrating, gained pulping goes to starch tower storage；
C making beating, by the slurry of step b gained, carries out making beating process, is pulled an oar by 1 mill,
Beating consistency is more than 4.5%, by controlling making beating flow and the depth of cut of mill, controls making beating slurry
Degree is higher than 50 ° of SR；
D adjuvant adds, by dosing pump, the slurry described in step c is carried out applying glue, interpolation is brightened
Agent, interpolation wet strength agent, make into paper applying glue hygroscopicity value less than 22g/m2(can suddenly method), becomes paper
Whiteness is higher than 83%, becomes the wet tensile (strength) retention rate of paper higher than 15%；
E streaming shapes the paper pulp prepared in step d is sent into online approach system, surfs the Net dense
Degree is at 0.45-0.55%, and wet end shake number of times should be not less than 300 times/min, and shake amplitude should not be low
In 15mm, wet end waterline is on the first two suction box of height positive suction water tank, and wet web goes out wet end
Cadre should be not less than 16%；
The wet web of step e gained is squeezed by f squeezing, by three road blind drilled press,
Take off the water content in wet web further, improve into paper tightness and intensity, carry out one light
Pool squeezing, improves in surface smoothness and smoothness further, and wet web goes out the mass dryness fraction of squeezing
33% should be not less than；
G, being dried, after squeezing step f, the page that obtains enters drying section, front 4 drying cylinders
Temperature should be not higher than 40 DEG C, and the drying temperature of drying section high temperature section should be not less than 85 DEG C, drying cylinder temperature
Degree should from low to high, the most from high to low；
H, press polish, processed by the hard press polish of four roller three nips the above-mentioned page through being dried,
The line pressure of hard calender should be not less than 12KN/m, makes into paper surface smoothness and is not less than 50s；
I, cut, the above-mentioned page processed through press polish pressure is cut, the paper roll two cut
Individual end face must be smooth, does not has cutter hair, heronsbill, the actual specification of paper roll and scheduling specification
Error should be not more than ± 3mm；
J, packaging, pack rolling by above-mentioned paper wrapping paper, and the outer package of paper roll should wrap one layer
Corrugated board；Two end faces are coated with by stretched film after wrapping corner protector, prevent paper roll from getting damp again.
Embodiment 2
A chooses raw material and chooses not through the art paper of printing, and art paper accounts for 50% ratio, takes
Join wood-free paper limit and the bleached bamboo pulp of 10% of 40%, art paper, wood-free paper limit should not contain painting
Carbonless paper after cloth, unbleached paper；
B waste paper pulp-making, by the raw material selected by step a, puts into D type pulping continuously, equably
Machine, after size degradation, by HC Cleaner, is interrupted the Ji Zhajing opening HC Cleaner, discharges
Bigger heavy slag in raw material；The good slurry of gained enters one section of scalping, removes the shape in raw material relatively
Big plastic sheet, foam, micelle etc., the good slurry of gained enters scummer system, and gained tail-rotor enters
Remove flotation smoothing machine, discharge tailings plastic sheet, thin film, foam etc. and reclaim good slurry therein；
Good slurry after scalping is entered scummer system, by five sections of scummers of one-level, removes in raw material
The grains of sand, tiny slag particle etc.；The good slurry of gained enters screening system, by the fine screen of one-level three sections,
Remove the less plastic sheet of the shape in slurry, micelle etc.；The good slurry of gained enters many disk filtration
Machine, after washing, concentrating, gained pulping goes to starch tower storage；
C making beating, by the slurry of step b gained, carries out making beating process, is pulled an oar by 1 mill,
Beating consistency is more than 4.5%, by controlling making beating flow and the depth of cut of mill, controls making beating slurry
Degree is higher than 50 ° of SR；
D adjuvant adds, by dosing pump, the slurry described in step c is carried out applying glue, interpolation is brightened
Agent, interpolation wet strength agent, make into paper applying glue hygroscopicity value less than 22g/m2(can suddenly method), becomes paper
Whiteness is higher than 83%, becomes the wet tensile (strength) retention rate of paper higher than 15%；
E streaming shapes the paper pulp prepared in step d is sent into online approach system, surfs the Net dense
Degree is at 0.45-0.55%, and wet end shake number of times should be not less than 300 times/min, and shake amplitude should not be low
In 15mm, wet end waterline is on the first two suction box of height positive suction water tank, and wet web goes out wet end
Mass dryness fraction should be not less than 16%；
The wet web of step e gained is squeezed by f squeezing, by three road blind drilled press,
Take off the water content in wet web further, improve into paper tightness and intensity, carry out one light
Pool squeezing, improves in surface smoothness and smoothness further, and wet web goes out the mass dryness fraction of squeezing
33% should be not less than；
G, being dried, after squeezing step f, the page that obtains enters drying section, front 4 drying cylinders
Temperature should be not higher than 40 DEG C, and the drying temperature of drying section high temperature section should be not less than 85 DEG C, drying cylinder temperature
Degree should from low to high, the most from high to low；
H, press polish, processed by the hard press polish of four roller three nips the above-mentioned page through being dried,
The line pressure of hard calender should be not less than 12KN/m, makes into paper surface smoothness and is not less than 50s；
I, cut, the above-mentioned page processed through press polish pressure is cut, the paper roll two cut
Individual end face must be smooth, does not has cutter hair, heronsbill, the actual specification of paper roll and scheduling specification
Error should be not more than ± 3mm；
J, packaging, pack rolling by above-mentioned paper wrapping paper, and the outer package of paper roll should wrap one layer
Corrugated board, two end faces are coated with by stretched film after wrapping corner protector, prevent paper roll from getting damp again.
Embodiment 3
A chooses raw material and chooses not through printing, and whiteness is not less than the wood-free paper limit of 70%, double
Gummed paper limit should not contain the carbonless paper after coating, unbleached paper；
B waste paper pulp-making, by the raw material selected by step a, puts into D type pulping continuously, equably
Machine, after size degradation, by HC Cleaner, is interrupted the Ji Zhajing opening HC Cleaner, discharges
Bigger heavy slag in raw material；The good slurry of gained enters one section of scalping, removes the shape in raw material relatively
Big plastic sheet, foam, micelle etc., the good slurry of gained enters scummer system, and gained tail-rotor enters
Remove flotation smoothing machine, discharge tailings plastic sheet, thin film, foam etc. and reclaim good slurry therein；
Good slurry after scalping is entered scummer system, by five sections of scummers of one-level, removes in raw material
The grains of sand, tiny slag particle etc.；The good slurry of gained enters screening system, by the fine screen of one-level three sections,
Remove the less plastic sheet of the shape in slurry, micelle etc.；The good slurry of gained enters many disk filtration
Machine, after washing, concentrating, gained pulping goes to starch tower storage；
C making beating, by the slurry of step b gained, carries out making beating process, is pulled an oar by 1 mill,
Beating consistency is more than 4.5%, by controlling making beating flow and the depth of cut of mill, controls making beating slurry
Degree is higher than 50 ° of SR；
D adjuvant adds, by dosing pump, the slurry described in step c is carried out applying glue, interpolation is brightened
Agent, interpolation wet strength agent, make into paper applying glue hygroscopicity value less than 22g/m2(can suddenly method), becomes paper
Whiteness is higher than 83%, becomes the wet tensile (strength) retention rate of paper higher than 15%；
E streaming shapes the paper pulp prepared in step d is sent into online approach system, surfs the Net dense
Degree is at 0.45-0.55%, and wet end shake number of times should be not less than 300 times/min, and shake amplitude should not be low
In 15mm, wet end waterline is on the first two suction box of height positive suction water tank, and wet web goes out wet end
Cadre should be not less than 16%；
The wet web of step e gained is squeezed by f squeezing, by three road blind drilled press,
Take off the water content in wet web further, improve into paper tightness and intensity, carry out one light
Pool squeezing, improves in surface smoothness and smoothness further, and wet web goes out the mass dryness fraction of squeezing
33% should be not less than；
G, being dried, after squeezing step f, the page that obtains enters drying section, front 4 drying cylinders
Temperature should be not higher than 40 DEG C, and the drying temperature of drying section high temperature section should be not less than 85 DEG C, drying cylinder temperature
Degree should from low to high, the most from high to low；
H, press polish, processed by the hard press polish of two roller one nips the above-mentioned page through being dried,
The line pressure of hard calender should be not less than 20KN/m, makes into paper surface smoothness and is not less than 50s；
I, cut, the above-mentioned page processed through press polish pressure is cut, the paper roll two cut
Individual end face must be smooth, does not has cutter hair, heronsbill, the actual specification of paper roll and scheduling specification
Error should be not more than ± 3mm；
J, packaging, pack rolling by above-mentioned paper wrapping paper, and the outer package of paper roll should wrap one layer
Corrugated board, two end faces are coated with by stretched film after wrapping corner protector, prevent paper roll from getting damp again.
Embodiment 2
A chooses raw material and chooses not through the art paper of printing, and art paper accounts for 50% ratio, takes
Join wood-free paper limit and the bleached bamboo pulp of 10% of 40%, art paper, wood-free paper limit should not contain painting
Carbonless paper after cloth, unbleached paper；
B waste paper pulp-making, by the raw material selected by step a, puts into D type pulping continuously, equably
Machine, after size degradation, by HC Cleaner, is interrupted the Ji Zhajing opening HC Cleaner, discharges
Bigger heavy slag in raw material；The good slurry of gained enters one section of scalping, removes the shape in raw material relatively
Big plastic sheet, foam, micelle etc., the good slurry of gained enters scummer system, and gained tail-rotor enters
Remove flotation smoothing machine, discharge tailings plastic sheet, thin film, foam etc. and reclaim good slurry therein；
Good slurry after scalping is entered scummer system, by five sections of scummers of one-level, removes in raw material
The grains of sand, tiny slag particle etc.；The good slurry of gained enters screening system, by the fine screen of one-level three sections,
Remove the less plastic sheet of the shape in slurry, micelle etc.；The good slurry of gained enters many disk filtration
Machine, after washing, concentrating, gained pulping goes to starch tower storage；
C making beating, by the slurry of step b gained, carries out making beating process, is pulled an oar by 1 mill,
Beating consistency is more than 4.5%, by controlling making beating flow and the depth of cut of mill, controls making beating slurry
Degree is higher than 50 ° of SR；
D adjuvant adds, by dosing pump, the slurry described in step c is carried out applying glue, interpolation is brightened
Agent, interpolation wet strength agent, make into paper applying glue hygroscopicity value less than 22g/m2(can suddenly method), becomes paper
Whiteness is higher than 83%, becomes the wet tensile (strength) retention rate of paper higher than 15%；
E streaming shapes the paper pulp prepared in step d is sent into online approach system, surfs the Net dense
Degree is at 0.45-0.55%, and wet end shake number of times should be not less than 300 times/min, and shake amplitude should not be low
In 15mm, wet end waterline is on the first two suction box of height positive suction water tank, and wet web goes out wet end
Mass dryness fraction should be not less than 16%；
The wet web of step e gained is squeezed by f squeezing, by three road blind drilled press,
Take off the water content in wet web further, improve into paper tightness and intensity, carry out one light
Pool squeezing, improves in surface smoothness and smoothness further, and wet web goes out the mass dryness fraction of squeezing
33% should be not less than；
G, being dried, after squeezing step f, the page that obtains enters drying section, front 4 drying cylinders
Temperature should be not higher than 40 DEG C, and the drying temperature of drying section high temperature section should be not less than 85 DEG C, drying cylinder temperature
Degree should from low to high, the most from high to low；
H, press polish, processed by the hard press polish of two roller one nips the above-mentioned page through being dried,
The line pressure of hard calender should be not less than 20KN/m, makes into paper surface smoothness and is not less than 50s；
I, cut, the above-mentioned page processed through press polish pressure is cut, the paper roll two cut
Individual end face must be smooth, does not has cutter hair, heronsbill, the actual specification of paper roll and scheduling specification
Error should be not more than ± 3mm；
J, packaging, pack rolling by above-mentioned paper wrapping paper, and the outer package of paper roll should wrap one layer
Corrugated board, two end faces are coated with by stretched film after wrapping corner protector, prevent paper roll from getting damp again.
Technique scheme only embodies the optimal technical scheme of technical solution of the present invention, this technology
Some variations that some of which part may be made by the technical staff in field all embody this
Bright principle, within belonging to protection scope of the present invention.
Claims (4)
1. one kind uses white waste paper to produce carbon-free unfired brick process, it is characterised in that should
Process comprises the steps:
A, choose raw material, choose waste and old blank sheet of paper as raw material；
B, waste paper pulp-making, utilize to purify and screen the raw material described in step a with screening installation,
Remove the impurity such as the wax point in wastepaper as raw material, plastic sheet, the grains of sand；
C, making beating, carry out making beating by mill to above-mentioned wastepaper as raw material and operate, and then makes slurry full
Foot paper machine production requirement；
D, adjuvant add, by add sizing agent, wet strength agent, make into paper meet water resistant, wet by force
Degree requirement；
E, streaming shape, and the paper pulp prepared is sent into papermaking approach system shape in step d, and
Web part of paper machine at paper machine makes l Water Paper page；
F, squeezing, the l Water Paper page preparing step e carries out press operation, obtains smooth, certain
The l Water Paper page of mass dryness fraction；
G, being dried, after squeezing step f, the page that obtains is dried process；
H, press polish, carry out press polish process to the above-mentioned page through being dried；
I, cut, the above-mentioned page processed through press polish pressure is cut, makes up to specification
Paper；
J, packaging, pack rolling by above-mentioned paper wrapping paper.
The white waste paper of use the most according to claim 1 produces carbon-free unfired brick process,
It is characterized in that, purification and screening installation in described step b can choose DLK waste paper pulp-making line
Excellent purification and screening installation, the scalping of preferable UV300 model, the fine screen of UV500 model.
The white waste paper of use the most according to claim 1 produces carbon-free unfired brick process,
It is characterized in that, the disc of the mill optional D model in described step c.
The white waste paper of use the most according to claim 1 produces carbon-free unfired brick process,
It is characterized in that, described step e during preparing page sizing agent consumption to be strengthened and wet by force
The consumption of agent, the consumption of sizing agent is original 1.5 times, and the consumption of wet strength agent is original 1.5
Times.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645768.4A CN105887540A (en) | 2014-11-15 | 2014-11-15 | Process method for producing carbon-free copying base paper by using white scrap paper |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410645768.4A CN105887540A (en) | 2014-11-15 | 2014-11-15 | Process method for producing carbon-free copying base paper by using white scrap paper |
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| CN105887540A true CN105887540A (en) | 2016-08-24 |
Family
ID=56698293
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Cited By (8)
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| CN108797180A (en) * | 2018-06-08 | 2018-11-13 | 天津市尖峰天然产物研究开发有限公司 | A method of papermaking magma or business card body paper are prepared by plant residue |
| CN110952358A (en) * | 2018-09-27 | 2020-04-03 | 台山市弘成纸业有限公司 | Preparation method of copy paper |
| CN110952378A (en) * | 2018-09-27 | 2020-04-03 | 台山市弘成纸业有限公司 | Preparation method of copy paper |
| CN110952370A (en) * | 2018-09-27 | 2020-04-03 | 台山市弘成纸业有限公司 | Preparation method of copy paper |
| CN110952371A (en) * | 2018-09-27 | 2020-04-03 | 台山市弘成纸业有限公司 | Preparation method of copy paper |
| CN111705543A (en) * | 2020-05-28 | 2020-09-25 | 仙鹤股份有限公司 | Preparation method of high-whiteness high-strength carbonless copy paper base paper |
| CN113481751A (en) * | 2021-06-28 | 2021-10-08 | 联盛纸业（龙海）有限公司 | Low-concentration heavy-weight slag removal method for OCC (optical cement) slurry of corrugated paper |
| CN114908478A (en) * | 2021-03-18 | 2022-08-16 | 江苏青昀新材料科技有限公司 | Light and thin flash evaporation polymer non-woven fabric |
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