CN106245412A - A kind of manufacture method of multilayer handsheet - Google Patents
A kind of manufacture method of multilayer handsheet Download PDFInfo
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- CN106245412A CN106245412A CN201610772932.7A CN201610772932A CN106245412A CN 106245412 A CN106245412 A CN 106245412A CN 201610772932 A CN201610772932 A CN 201610772932A CN 106245412 A CN106245412 A CN 106245412A
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F13/00—Making discontinuous sheets of paper, pulpboard or cardboard, or of wet web, for fibreboard production
- D21F13/02—Making hand-made paper
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Abstract
The manufacture method of a kind of multilayer handsheet, comprises the steps: that prepared slurry is obtained paper pulp by sheet forming apparatus by (1)；(2) paper pulp is precipitated in sheet forming apparatus, copy and take out wet thin paper page；(3) using cotton to be placed on wet thin paper page, moisture removal is removed in roll-in, tears off the thin paper page after dehydration；(4), after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, it is sequentially overlapped, and when every one tissue sheet of superposition, all sprays high temperature resistant reinforcing agent；(5) putting in hot press, first pressure moisture removal is thermally dried again, it is thus achieved that multilayer handsheet；The preparation method that the present invention proposes effectively reduces the difficulty of follow-up superposition and broken breaks the probability of paper；Improve the bonding dynamics between every layer of tissue sheet, the high temperature resistant and performance of intensity；Optimizing the multiformity of multilayer handsheet performance, the experiment scope of application is wider, manipulation simplicity, the uniform quality of multilayer handsheet, smooth densification, and low cost and pressing efficiency are high.
Description
Technical field
The present invention relates to field of papermaking handsheet technical field, particularly relate to the manufacture method of a kind of multilayer handsheet.
Background technology
Currently in order in the lab the cardboard after being combined is carried out the research on paper performance, need to prepare multilamellar write by hand
Sheet carries out its performance study, and in view of the restriction on time and equipment cost, then be not suitable for using industrial greatly
Equipment, but owing to being limited in the quality of the multilayer handsheet by preparing and performance, and cause the reference affecting test result
It is worth.The most existing preparation technology for multilayer handsheet, a kind of real as disclosed in Patent No. 200910098387.8
Test the manufacture method of room multilayer handsheet, be by overlapping after individual wet sheet is squeezed, and in every superposition one
Need during layer to carry out cross lamination rolling in length and breadth, the most again the handsheet after superposition squeezed, but still there is deficiency,
Often during prepared by multilayer handsheet, often can be because in multiple tissue sheet of superposition, simultaneously to multiple overlaps
Tissue sheet carries out roll-in, owing to repeatedly roll-in causes the undue dehydration of the tissue sheet of bottom deformation or slight crack occur, because of
There is the stability being difficult to control to paper at compound tense guarantee moisture in this, the adhesion between ply of paper is unstable, and quality is uneven,
Broken paper easily occurs, splits paper, the problem of manipulation difficulty.
Summary of the invention
It is an object of the invention to propose the manufacture method of a kind of simple to operate and that breakage rate is low multilayer handsheet, its system
The multilayer handsheet features such as to have heat stability high, and smooth densification, bonding dynamics be strong and experimentation is applied widely.
For reaching this purpose, the present invention by the following technical solutions:
The manufacture method of a kind of multilayer handsheet, comprises the steps:
(1) paper pulp prepares: fibre stuff, sizing agent, wet strength agent, drying strengthening agent, emulsion, dyestuff and water are added in fiberizer
Polishing prepare slurry, then by sheet forming apparatus to polishing after pulp dilution, stir and cross net drainage, it is thus achieved that paper pulp；
(2) paper pulp precipitation: precipitated in sheet forming apparatus by the paper pulp that step (2) obtains, copies and takes out wet thin paper page；
(3) roll-in is covered: using cotton to be placed on described wet thin paper page, moisture removal is removed in roll-in, takes off from described cotton
Take the thin paper page after dehydration；
(4) stacking: after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, be sequentially overlapped, and in every superposition one
When opening tissue sheet, all at the high temperature resistant reinforcing agent of its surface spraying；
(5) squeezing: put in hot press by the tissue sheet of superposition, is first pressed moisture removal by heating platen, then is thermally dried,
Wherein controlling pressure is 413.7kPa, squeezes the time 8～10min, and heating-up temperature is 160～200 DEG C, it is thus achieved that multilayer handsheet.
Further illustrating, the grammes per square metre copying the wet thin paper page of taking-up described in step (2) is 10～15g/cm2, thickness is 0.6
～1.2mm, tightness is 0.4～0.6g/cm3, water content is 75～80%.
Further illustrating, the described high temperature resistant reinforcing agent in step (4) is Oxytarch and poly-vinyl alcohol solution.
Further illustrating, described sizing agent is AKD sizing agent, and described wet strength agent is TH-P50, and described emulsion is butadiene-styrene rubber
Breast or propylene vinegar latex, described drying strengthening agent is polyacrylamide or Biformyl polyacrylamide.
Further illustrate, every thin paper quantification of 5g/cm of page over dry in the described multilayer handsheet that step (5) obtains2。
Further illustrating, the thickness of the described multilayer handsheet that step (5) obtains is 1.5～2.5mm, tightness be 1.2～
1.3g/cm3。
Further illustrating, the surface temperature of the described multilayer handsheet that step (5) obtains is 24～25 DEG C.
Beneficial effects of the present invention: (1) is being dehydrated and is being simultaneously achieved preliminary rolling effect to individual thin paper, logical
Cross the roll-in dehydration of cotton interval, on the basis of effectively controlling water content and the flatness of every thin paper page, it is ensured that every thin paper
The integrity degree of sheet, reduces the difficulty of follow-up superposition and broken breaks the probability of paper, and the stability of tissue sheet is higher, the effect of superposition
More preferably, processing step is simpler.
(2) during carrying out tissue sheet superposition, spray high temperature resistant reinforcing agent at paper, be possible not only to improve every layer thin
Bonding dynamics between the scraps of paper, and ensure each layer of tissue sheet strength character, resistance to thermal dimensional stability, improve tissue sheet
The performance of high temperature resistant and intensity；The reinforcing agent spraying other functions can also be increased on this basis, thus optimize multilamellar hands
The multiformity of paper's capability, is conducive to the preparation in the lab to polyfunctional multilayer handsheet, and experimentation is suitable for model
Enclose wider, various physical property measurement can be carried out.
(3) first pass through heating platen pressure moisture removal, be thermally dried bonding the most again, it is ensured that during the bonding of the multi-layer thin scraps of paper
Stable, the smooth densification of moisture, strength character is stable, manipulates easier, it is thus achieved that the uniform quality of multilayer handsheet, cost
Low and pressing efficiency is high, and the multilayer handsheet that the present invention prepares can operate with many experimentatioies.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet of the manufacture method of a kind of multilayer handsheet of one embodiment of the invention；
Wherein: sheet forming apparatus 1, roller 2, hot press 3, heating platen 31, tissue sheet 4, multilayer handsheet 5.
Detailed description of the invention
Further illustrate technical scheme below in conjunction with the accompanying drawings and by detailed description of the invention.
The manufacture method of a kind of multilayer handsheet, comprises the steps:
(1) paper pulp prepares: fibre stuff, sizing agent, wet strength agent, drying strengthening agent, emulsion, dyestuff and water are added in fiberizer
Polishing prepare slurry, then by sheet forming apparatus to polishing after pulp dilution, stir and cross net drainage, it is thus achieved that paper pulp；
(2) paper pulp precipitation: precipitated in sheet forming apparatus by the paper pulp that step (2) obtains, copies and takes out wet thin paper page；
(3) roll-in is covered: using cotton to be placed on described wet thin paper page, moisture removal is removed in roll-in, takes off from described cotton
Take the thin paper page after dehydration；
(4) stacking: after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, be sequentially overlapped, and in every superposition one
When opening tissue sheet, all at the high temperature resistant reinforcing agent of its surface spraying；
(5) squeezing: put in hot press by the tissue sheet of superposition, is first pressed moisture removal by heating platen, then is thermally dried,
Wherein controlling pressure is 413.7kPa, squeezes the time 8～10min, and heating-up temperature is 160～200 DEG C, it is thus achieved that multilayer handsheet.
The manufacture method of a kind of multilayer handsheet that the present invention proposes, is first carried out in individual wet thin paper beginning of the page copying taking-up
After covering roll-in dehydration, and during carrying out each thin paper page superposition, spray described high temperature resistant reinforcing agent improve further
Bonding strength between each thin paper page, makes multi-layer thin page fully bond finally by high temperature hot pressing, it is thus achieved that multilamellar write by hand
Sheet.It has the following characteristics that
(1) individual thin paper is being dehydrated and is being simultaneously achieved preliminary rolling effect, taken off by cotton interval roll-in
Water, the most effectively controls the dehydrating amount of thin paper page, and wet tissue sheet will not produce the destruction of machinery；The while of comparing existing
Rolling methods to the tissue sheet of multiple overlaps, it is to avoid in multiple tissue sheet of superposition, under repeatedly roll-in causes
The undue dehydration of the tissue sheet in portion and deformation or slight crack occur, the most effectively control water content and the flatness of every thin paper page
On the basis of, it is ensured that the integrity degree of every tissue sheet, reduce the difficulty of follow-up superposition and broken breaks the probability of paper, tissue sheet
Stability is higher, and the effect of superposition is more preferable, and processing step is simpler.
(2) during carrying out tissue sheet superposition, spray high temperature resistant reinforcing agent at paper, be possible not only to improve every layer thin
Bonding dynamics between the scraps of paper, and ensure each layer of tissue sheet strength character, resistance to thermal dimensional stability, it is to avoid follow-up
High Temperature High Pressure squeezing time damage to paper, improve the performance of the high temperature resistant of tissue sheet and intensity；Furthermore it is also possible at this
On the basis of increase the reinforcing agent spraying other functions, thus optimize the multiformity of multilayer handsheet performance, be conducive at laboratory
In preparation to polyfunctional multilayer handsheet, the experimentation scope of application is wider, can carry out various physical property measurement.
(3) owing to will increase at the moisture of tissue sheet spraying high temperature resistant reinforcing agent, therefore the process squeezed is being carried out
In, first pass through heating platen pressure moisture removal, be thermally dried bonding the most again, it is ensured that during the bonding of the multi-layer thin scraps of paper, moisture is steady
Fixed, smooth densification, strength character is stable, manipulates easier, it is thus achieved that the uniform quality of multilayer handsheet, low cost and pressing
Efficiency is high.
The multilayer handsheet that the present invention prepares can operate with many experimentatioies, A: can study fiber prescription difference right
The impact of the physical property of multilayer handsheet, such as: (1) 100%13# U.S.A gives up formula and 100% domestic occ waste paper formulation rationality
The difference of energy；(2) useless+5% domestic occ of 50%13# U.S. and the difference of independent two formula；(3) the wood pulp Canada of different proportion
Interior occ or the difference of import occ；(4) effect of other functional fiber of addition can also be studied；B: interpolation can be studied and do not assimilate
The product impact on the physical property of multilayer handsheet, such as: (1) adds different emulsions and changes the impact of multilayer handsheet
Research；(2) comparative study of different wet strength agent is added；(3) comparative study of different drying strengthening agent is added；(4) add difference to form sediment
The comparative study of powder；(5) comparative study etc. of different dyes is added.
Further illustrating, the grammes per square metre copying the wet thin paper page of taking-up described in step (2) is 10～15g/cm2, thickness is 0.6
～1.2mm, tightness is 0.4～0.6g/cm3, water content is 75～80%.Copy described in control taking-up wet thin paper page gram
Weight, thickness, tightness and water content, be to ensure that effectively can carry out tissue sheet is smooth when the later stage carries out covering roll-in
Flattening and dehydration, the value range of the most above-mentioned thin paper page parameter can make thin paper page under bearing certain roller pressure, can obtain matter
Measure impartial and stable thin paper page, it is to avoid paper is crossed thin or overdrying and caused the damaged and waste of material, improve yield rate and excellent
Matter rate, economizes in raw materials and the energy, reduces cost.
Further illustrating, the described high temperature resistant reinforcing agent in step (4) is Oxytarch and poly-vinyl alcohol solution.Described oxygen
Changing starch and have higher heat stability, polyvinyl alcohol then has the strong adherence of uniqueness, protecting colloid, gas barrier performance
And wearability, therefore cover a certain amount of Oxytarch and polyvinyl alcohol by the surface spraying at tissue sheet, thus strengthen
Inter-layer bonding force between tissue sheet and heat resistance.
Further illustrating, described sizing agent is AKD sizing agent, and described wet strength agent is TH-P50, and described emulsion is butadiene-styrene rubber
Breast or propylene vinegar latex, described drying strengthening agent is polyacrylamide or Biformyl polyacrylamide.During preparing slurry
Improve the performance of tissue sheet by adding chemical assistant, the water-resistance of paper can be improved by described AKD sizing agent, described wet
Strong agent is that TH-P50 has obvious retention, filtrating aid function in slurry paper-making process, and improves folding strength and the table of paper
Face intensity, described drying strengthening agent polyacrylamide or Biformyl polyacrylamide can make the fiber in slurry be more evenly distributed, thus
Improve the intensity of paper.
Further illustrate, every thin paper quantification of 5g/cm of page over dry in the described multilayer handsheet that step (5) obtains2。
The needs of the thickness according to different handsheets carry out the superposition of the tissue sheet of varying number, by controlling every tissue sheet page
The quantification of 5g/cm of over dry2, it is ensured that effectively bonding dynamics and the uniformity of quality of every layer of tissue sheet, make multilayer handsheet be easy to
Experimentation is carried out as experiment sample.
Further illustrating, the thickness of the described multilayer handsheet that step (5) obtains is 1.5～2.5mm, tightness be 1.2～
1.3g/cm3.The multilayer handsheet of different-thickness can be needed according to different experimentatioies, and generally carrying out the multi-layer thin scraps of paper
Squeezing during, controlling the pressure of certain squeezing and in the time, by the tightness improving multilayer handsheet be 1.2～
1.3g/cm3, thus ensure the overall adhesion strength of multilayer handsheet.
Further illustrating, the surface temperature of the described multilayer handsheet that step (5) obtains is 24～25 DEG C.
As it is shown in figure 1, the manufacture method of an embodiment 1-multilayer handsheet, comprise the steps:
(1) paper pulp prepares: by fibre stuff, AKD sizing agent, TH-P50, polyacrylamide, styrene-butadiene latex, dyestuff and water
Add polishing in fiberizer and prepare slurry, then by sheet forming apparatus 1, the slurry after polishing is diluted, be sufficiently stirred for and mistake
Net drainage, it is thus achieved that paper pulp；
(2) paper pulp precipitation: precipitated in sheet forming apparatus by the paper pulp that step (2) obtains, copies and takes out wet thin paper page, its
In copy that to take out the grammes per square metre of wet thin paper page be 10g/cm2, thickness is 0.6mm, and tightness is 0.6g/cm3, water content is 75%；
(3) cover roll-in: use cotton to be placed on described wet thin paper page, use roller 2 that thin paper page is carried out roll-in
Moisture removal, tears off the thin paper page 4 after dehydration from described cotton；
(4) stacking: after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, be sequentially overlapped；
(5) squeezing: put in hot press 3 by the tissue sheet 4 of superposition, is first pressed moisture removal by heating platen 31, then heats
Being dried, wherein controlling pressure is 413.7kPa, squeezes time 8min, and heating-up temperature is 160 DEG C, it is thus achieved that multilayer handsheet 5, wherein
The thickness of described multilayer handsheet is 1.5mm, and tightness is 1.3g/cm3, surface temperature is 25 DEG C, and every thin paper page over dry is quantitative
For 5g/cm2.The described multilamellar copy paper sheet prepared by said method is extracted 10 samples and carries out the test of physical property, as
Following table:
The manufacture method of a comparative example 1-multilayer handsheet, comprises the steps:
(1) paper pulp prepares: by fibre stuff, AKD sizing agent, TH-P50, polyacrylamide, styrene-butadiene latex, dyestuff and water
Add polishing in fiberizer and prepare slurry, then by sheet forming apparatus, the slurry after polishing is diluted, be sufficiently stirred for and mistake
Net drainage, it is thus achieved that paper pulp；
(2) paper pulp precipitation: precipitated in sheet forming apparatus by the paper pulp that step (2) obtains, copies and takes out wet thin paper page, its
In copy that to take out the grammes per square metre of wet thin paper page be 10g/cm2, thickness is 0.6mm, and tightness is 0.6g/cm3, water content is 75%；
(3) roll-in is covered: using cotton to be placed on described wet thin paper page, moisture removal is removed in roll-in, takes off from described cotton
Take the thin paper page after dehydration；
(4) stacking: after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, be sequentially overlapped, and in every superposition
During one tissue sheet, all at its surface spraying Oxytarch and poly-vinyl alcohol solution；
(5) squeezing: put in hot press by the tissue sheet of superposition, is first pressed moisture removal by heating platen, then is thermally dried,
Wherein controlling pressure is 413.7kPa, squeezes time 8min, and heating-up temperature is 160 DEG C, it is thus achieved that multilayer handsheet, wherein said many
The thickness of layer handsheet is 1.5mm, and tightness is 1.3g/cm3, surface temperature is 25 DEG C, every thin paper quantification of 5g/ of page over dry
cm2.The described multilamellar copy paper sheet prepared by said method is extracted 10 samples and carries out the test of physical property, such as following table:
Contrasted by embodiment 1 and comparative example 1, tissue sheet is being carried out being sequentially overlapped by comparative example 1
During all at the high temperature resistant reinforcing agent of its surface spraying so that the bond strength of the multilamellar copy paper sheet obtained after squeezing
Significantly improving, flatness is more preferable, and between ply of paper, consistency is high, and does not breaks the feelings of paper rate during carrying out roll-in and squeezing
Condition.
The manufacture method of an embodiment 2-multilayer handsheet, comprises the steps:
(1) paper pulp prepares: by fibre stuff, AKD sizing agent, TH-P50, polyacrylamide, styrene-butadiene latex, dyestuff and water
Add polishing in fiberizer and prepare slurry, then by sheet forming apparatus, the slurry after polishing is diluted, be sufficiently stirred for and mistake
Net drainage, it is thus achieved that paper pulp；
(2) paper pulp precipitation: precipitated in sheet forming apparatus by the paper pulp that step (2) obtains, copies and takes out wet thin paper page, its
In copy that to take out the grammes per square metre of wet thin paper page be 15g/cm2, thickness is 1.2mm, and tightness is 0.4g/cm3, water content is 80%；
(3) roll-in is covered: using cotton to be placed on described wet thin paper page, moisture removal is removed in roll-in, takes off from described cotton
Take the thin paper page after dehydration；
(4) stacking: after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, be sequentially overlapped, and in every superposition
During one tissue sheet, all at its surface spraying Oxytarch and poly-vinyl alcohol solution；
(5) squeezing: put in hot press by the tissue sheet of superposition, is first pressed moisture removal by heating platen, then is thermally dried,
Wherein controlling pressure is 413.7kPa, squeezes time 10min, and heating-up temperature is 200 DEG C, it is thus achieved that multilayer handsheet, wherein said
The thickness of multilayer handsheet is 2.5mm, and tightness is 1.2g/cm3, surface temperature is 24 DEG C, every thin paper quantification of 5g/ of page over dry
cm2.The described multilamellar copy paper sheet prepared by said method is extracted 10 samples and carries out the test of physical property, such as following table:
The manufacture method of an embodiment 3--multilayer handsheet, comprises the steps:
(1) paper pulp prepares: by fibre stuff, AKD sizing agent, TH-P50, Biformyl polyacrylamide, propylene vinegar glue
Breast, dyestuff and water add polishing in fiberizer and prepare slurry, then are diluted the slurry after polishing by sheet forming apparatus, fill
Divide stirring and cross net drainage, it is thus achieved that paper pulp；
(2) paper pulp precipitation: precipitated in sheet forming apparatus by the paper pulp that step (2) obtains, copies and takes out wet thin paper page, its
In copy that to take out the grammes per square metre of wet thin paper page be 12.5g/cm2, thickness is 0.9mm, and tightness is 0.5g/cm3, water content is 77.5%；
(3) roll-in is covered: using cotton to be placed on described wet thin paper page, moisture removal is removed in roll-in, takes off from described cotton
Take the thin paper page after dehydration；
(4) stacking: after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, be sequentially overlapped, and in every superposition
During one tissue sheet, all at its surface spraying Oxytarch and poly-vinyl alcohol solution；
(5) squeezing: put in hot press by the tissue sheet of superposition, is first pressed moisture removal by heating platen, then is thermally dried,
Wherein controlling pressure is 413.7kPa, squeezes time 9min, and heating-up temperature is 180 DEG C, it is thus achieved that multilayer handsheet, wherein said many
The thickness of layer handsheet is 2.0mm, and tightness is 1.25g/cm3, surface temperature is 24.5 DEG C, and every thin paper page over dry is quantification of
5g/cm2.The described multilamellar copy paper sheet prepared by said method is extracted 10 samples and carries out the test of physical property, as follows
Table:
The know-why of the present invention is described above in association with specific embodiment.These describe and are intended merely to explain the present invention's
Principle, and limiting the scope of the invention can not be construed to by any way.Based on explanation herein, the technology of this area
Personnel need not pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes fall within
Within protection scope of the present invention.
Claims (7)
1. the manufacture method of a multilayer handsheet, it is characterised in that: comprise the steps:
(1) paper pulp prepares: fibre stuff, sizing agent, wet strength agent, drying strengthening agent, emulsion, dyestuff and water is added in fiberizer and polishes
Prepare slurry, then by sheet forming apparatus to polishing after pulp dilution, stir and cross net drainage, it is thus achieved that paper pulp；
(2) paper pulp precipitation: precipitated in sheet forming apparatus by the paper pulp that step (2) obtains, copies and takes out wet thin paper page；
(3) roll-in is covered: using cotton to be placed on described wet thin paper page, moisture removal is removed in roll-in, tears off de-from described cotton
Thin paper page after water；
(4) stacking: after repeating the tissue sheet that step (1)～(3) obtains predetermined quantity, be sequentially overlapped, and thin every superposition one
During the scraps of paper, all at the high temperature resistant reinforcing agent of its surface spraying；
(5) squeezing: put in hot press by the tissue sheet of superposition, is first pressed moisture removal by heating platen, then is thermally dried, wherein
Control pressure is 413.7kPa, squeezes the time 8～10min, and heating-up temperature is 160～200 DEG C, it is thus achieved that multilayer handsheet.
The manufacture method of a kind of multilayer handsheet the most according to claim 1, it is characterised in that: step is copied described in (2)
The grammes per square metre taking out wet thin paper page is 10～15g/cm2, thickness is 0.6～1.2mm, and tightness is 0.4～0.6g/cm3, water content
It is 75～80%.
The manufacture method of a kind of multilayer handsheet the most according to claim 1, it is characterised in that: described in step (4)
High temperature resistant reinforcing agent is Oxytarch and poly-vinyl alcohol solution.
The manufacture method of a kind of multilayer handsheet the most according to claim 1, it is characterised in that: described sizing agent is AKD
Sizing agent, described wet strength agent is TH-P50, and described emulsion is styrene-butadiene latex or propylene vinegar latex, and described drying strengthening agent is polypropylene
Amide or Biformyl polyacrylamide.
The manufacture method of a kind of multilayer handsheet the most according to claim 1, it is characterised in that: the institute that step (5) obtains
State every thin paper quantification of 5g/cm of page over dry in multilayer handsheet2。
The manufacture method of a kind of multilayer handsheet the most according to claim 1, it is characterised in that: the institute that step (5) obtains
The thickness stating multilayer handsheet is 1.5～2.5mm, and tightness is 1.2～1.3g/cm3。
The manufacture method of a kind of multilayer handsheet the most according to claim 1, it is characterised in that: the institute that step (5) obtains
The surface temperature stating multilayer handsheet is 24～25 DEG C.
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| CN108103827A (en) * | 2017-12-15 | 2018-06-01 | 天津科技大学 | A kind of laboratory is manufactured paper with pulp the method for paper for daily use |
| CN110284354A (en) * | 2019-05-17 | 2019-09-27 | 合肥宜果科技服务有限公司 | A kind of preparation method of biomass packing board |
| CN112609504A (en) * | 2020-12-10 | 2021-04-06 | 上海东升新材料有限公司 | Paper pattern making method for evaluating application effect of low-chlorine wet strength agent in household paper |
| CN113529494A (en) * | 2021-07-27 | 2021-10-22 | 浙江省林业科学研究院 | Preparation method of bamboo-based hybrid fiber felt for VARTM (vacuum-assisted transfer molding) molding composite material |
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