CN106192578B - A kind of leather neutral sizing and its preparation technology - Google Patents
A kind of leather neutral sizing and its preparation technology Download PDFInfo
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- CN106192578B CN106192578B CN201610548841.5A CN201610548841A CN106192578B CN 106192578 B CN106192578 B CN 106192578B CN 201610548841 A CN201610548841 A CN 201610548841A CN 106192578 B CN106192578 B CN 106192578B
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Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
- D21H27/001—Release paper
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H15/00—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution
- D21H15/02—Pulp or paper, comprising fibres or web-forming material characterised by features other than their chemical constitution characterised by configuration
- D21H15/10—Composite fibres
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/10—Coatings without pigments
- D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
- D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/16—Sizing or water-repelling agents
Abstract
The present invention provides a kind of leather neutral sizing, the leather neutral sizing, quantification of 130 150g/m2, paper surface roughness Ra≤4.0 μm；The present invention also provides boiling for a kind of preparation technology of leather neutral sizing, the technique, including surface size, and 9 11% starch fluid and 150kg 3.6wt% PVA lysates are well mixed, surface size is made.Beneficial effects of the present invention are：Leather neutral sizing prepared by the present invention, quantification of 130 150g/m2 of leather neutral sizing；Paper surface roughness Ra≤4.0 μm；Paper smoothness >=30S；With pp film combinations in use, pp films and paper are firmly combined with, it is not easy to tear；Horizontal tearability >=1100mN, longitudinal dry tensile strength >=100N/15mm, horizontal dry tensile strength >=60N/15mm.
Description
Technical field
The invention belongs to pulp technology for making paper, more particularly to a kind of leather neutral sizing and its preparation technology.
Background technology
Leather release liners are a kind of special separate papers, and its coating typically has concavo-convex pattern structure.It is artificial
Leather, can be impressing as the carrier leather release liners in artificial leather and synthetic leather production with being widely used in synthetic leather industry
Decorative pattern thereon is copied on artificial leather and synthetic leather.
Release liners are widely used for the production of artificial leather and synthetic leather as carrier, have the incomparable warp of other carriers
Ji advantage.Leather release liners use as the carrier that artificial leather produces, and instead of backward punching block stamp, can give artificial leather or conjunction
Change is brought on the surface of finished leather, and this point is unable to handle using stainless steel band.Embossed release liners can be by various skins
Line is transferred to the surface of artificial leather or synthetic leather, and can modification of surfaces.In addition, dermatoglyph to be exchanged is also quite convenient, it is not required to change
Any equipment, change the release liners can of Zhang Suoxu dermatoglyphs.Furthermore the decorative pattern of leather release liners is easily bonded with leather, cold
But the leather and fur products decorative pattern after solidifying is clear, has good feel, it appears that and it is life-like, it is several to look genuine.
Reported according to Chinese papermaking association, according to the calculating of industry statistic and leather consumption figure, forecast China artificial leather industry to from
The aggregate demand of type paper is about 5~70,000 tons/year, and 80% relies on import.And China is currently under release liners blank stage, user
Expensive goods can only be obtained from import channel, expend substantial amounts of foreign exchange.Therefore, the current scape of this item can be predicted in terms of 4 is
It is very optimistic：
（1）The production of Chinese leather release liners still in the early stage of development, substantially relies on import, the release original of leather at present
The production of paper is also in order at initial stage；
（2）With Chinese people's growth in the living standard, high-quality PVC, PU artificial leather product market potential is very big；
（3）Active demand of the development of Chinese PVC, PU artificial leather industry to release liners, the price of external import paper are still high
Do not occupy；
（4）The transfer of Hong Kong, Taiwan PVC, PU artificial leather product industry to China is also the life of Chinese PVC, PU artificial leather
Market has been widened in production.
Leather release liners belong to the special paper kind of high-tech at present, in the world only Sa Pei paper industry group, Japan in the U.S.
Lindeke Co., Ltd, Italian Fan Weini companies, a small number of producers such as Gen Si companies of A Er Novi of France can produce this
Paper.From the point of view of the service condition of Leather Factory, domestic leather release liners technology is unqualified, the outstanding problem of following 3 aspect be present：
Strength character is poor, poor heat resistance, the measure of precision of decorative pattern and species do not reach production requirement.Leather release paper market in China's is basic
It is to be monopolized by leather release liners overseas-funded enterprise of the world.China as artificial leather and synthetic leather production, consume big country, 80%
Import is relied on, market is huge.
Leather release liners are a kind of coating papers, according to the difference of its preparation technology, have different product structures, generally by
Paper substrate, sealing paint layer and release dope layer form its basic structure, with general coating paper without too big difference, essential difference
It is that its coating surface has concavo-convex pattern structure, and the most important part of leather release liners is body paper, he decides skin
The performance and service life of release liners are removed from office, is its most important part.
Leather neutral sizing at present, 70% relies on import, and domestic market is wide, and development opportunity is more.
It is insufficient existing for existing leather neutral sizing：
（1）The surface sophistication and smoothness of paper are poor, rougher；With pp films（Polypropylene）During combined use, pp films
And the combination of paper is insecure, is easy to tear off, easily layering；
（2）Surface strength of paper is low, and tear-resistant property is bad；
（3）Surface water-resistance can be undesirable；
（4）Surface gas permeability is poor；
（5）Paper is yielding, and folding and bursting strength are poor；
（6）Paper has the paper defects such as paper folding, impression, foreign matter.
The content of the invention
The technical problem to be solved in the present invention is the weak point present in prior art, there is provided a kind of leather is release
Body paper and its preparation technology, to realize following goal of the invention：
（1）Leather neutral sizing prepared by the present invention, the quantification of 130-150g/m2 of leather neutral sizing；Paper surface
Roughness Ra≤4.0 μm；Paper smoothness >=30S；With pp film combinations in use, pp films and paper are firmly combined with, it is not easy to tear
Open；
（2）Leather neutral sizing prepared by the present invention, horizontal tearability >=1100mN, longitudinal dry tensile strength >=100N/
15mm, horizontal dry tensile strength >=60N/15mm, longitudinal wet tensile (strength) >=9N/15mm, horizontal wet tensile (strength) >=4N/
15mm；
（3）Leather neutral sizing prepared by the present invention, hygroscopicity value≤40g/m2；
（4）Leather neutral sizing prepared by the present invention, air permeability≤90s；
（5）Leather neutral sizing prepared by the present invention, folding strength >=50 time, bursting strength >=280Kpa, deformation rate≤2.0%
（6）Leather neutral sizing prepared by the present invention, paper is without the paper defects such as paper folding, impression, foreign matter.
In order to solve the above technical problems, the technical scheme that the present invention takes is as follows：
A kind of leather neutral sizing, the leather neutral sizing, quantification of 130-150g/m2, paper surface roughness Ra
≤4.0μm。
It is the further improvement to above-mentioned technical proposal below：
The leather neutral sizing, the smoothness of positive and negative are respectively 35-60s, 32-50s, and horizontal tearability >=
1100mN；Longitudinal dry tensile strength >=100N/15mm.
A kind of preparation technology of leather neutral sizing, the technique, including surface size boil, by 9-11% shallow lake
Powder liquid and 150kg 3.6wt% PVA lysates are well mixed, and surface size is made.
The PVA lysates, its preparation method are：Into 2000kg water, added simultaneously under 200r/min stirring
75kgPVA chip solids, temperature are increased to 50 DEG C from 25 DEG C with 5 DEG C per minute of speed, are kept for 10 minutes, continued with per minute
3 DEG C of speed is warming up to 98 DEG C, 30min is incubated, until medicine is completely dissolved.
The starch fluid of the 9-11%, its preparation method are：Add water 3600kg, under 400r/min stirring, add denaturation
Oxidized starch 400-600kg, charging rate 15-20kg/min, stirs, and temperature is from 25 DEG C with 4 DEG C per minute of speed
60 DEG C are increased to, is kept for 10 minutes, continues to be warming up to 98 DEG C, when temperature is raised to 98 DEG C with 2 DEG C per minute of speed, is incubated 15 points
Clock, reuse recirculated cooling water and cool to 60-65 DEG C, stir, filter, concentration 9-11% starch fluid is made.
The technique, including press polish, the press polish, speed 95-110m/min, pressure 2-5MPa；Control paper is put down
Cunning >=30s；Control banner thickness difference≤3-5% of paper bowl.
The technique, including first time rewinding；The first time rewinding, rewinding speed per hour are controlled in 400m/min, quantitative
System is controlled 3.0~4.5% in 130~150g/m2, moisture.
The moisture control, preferably 3-3.2%.
The technique, including second of rewinding, second of rewinding, rewinding speed per hour are controlled in 200m/min, quantitative
System is controlled 3~5.0% in 130~150g/m2, moisture.
The moisture control, preferably 3-3.2%.
The technique, including top sizing, the top sizing, Stress control is in 0.25~0.6MPa, resin added control
In 4~8g/m2.
It is preferred that：The top sizing, Stress control are controlled in 6-8g/m2 in 0.35-0.37MPa, resin added.
The technique, in addition to slurrying, mixing, papermaking；
The slurrying, including prepare long stuff；It is described to prepare long stuff, it is 2.5~2.7mm by fibre length
Bleached sulphate needle long fibre wood pulp, after crushed, control pulp beating power for 150~190kwh, mashing current control exist
260 ± 20A, beating consistency are 4.0~4.3%, 32~40 ° of SR of beating degree, and long stuff is made；
Described to prepare long stuff, beating degree is preferably 36-40 ° of SR；
The slurrying, including prepare short stock；It is described to prepare short stock, by fibre length be 0.75~
0.9mm bleached sulphate broad-leaved chopped fiber wood pulps, after crushing, and pulp beating power are controlled as 120~145kwh, mashing electric current
It is that short stock is made in 4.2~4.5%, 33~38 ° of SR of beating degree to control in 260 ± 20A, beating consistency；
Described to prepare short stock, beating consistency is preferably 4.3-4.5%；Beating degree, preferably 34-35 ° of SR；
The suction amount ratio of the mixing, papermaking, long stuff and short stock is 1:3~7, adding concentration is
15.2% AKD neutral sizing agents, ton paper dosage are 10-16kg；It is 0.5~1.5% to control online concentration.
The suction amount ratio of the long stuff and short stock, preferably 1:6-7；
The online concentration, preferably 1.3-1.5%；
Compared with prior art, beneficial effects of the present invention are：
（1）Leather neutral sizing prepared by the present invention, the quantification of 130-150g/m2 of leather neutral sizing；Paper surface
Roughness Ra is 1.5-3.9 μm；Paper smoothness（It is positive/negative）For 35-60/32-50s；With pp film combinations in use, pp films and paper
Be firmly combined with, it is not easy to tear；Under 105 degree of baking ovens, dry before with baking after than unchanged, with the preferable characteristic of pp film combinations.
（2）Leather neutral sizing prepared by the present invention, horizontal tearability is 1100-1600mN, longitudinal dry tensile strength is
100-130N/15mm, horizontal dry tensile strength are 60-88N/15mm, longitudinal wet tensile (strength) is 9-15N/15mm, laterally wet anti-
Zhang Qiangdu >=4.5-7N/15mm.
（3）Leather neutral sizing prepared by the present invention, the hygroscopicity value of positive and negative is respectively 23-35 g/m2,20-30 g/m
²。
（4）Leather neutral sizing prepared by the present invention, air permeability 50-90s.
（5）Leather neutral sizing prepared by the present invention, folding strength is 56-80 times, bursting strength 300-380Kpa, deformation rate
≤ it is 0.8-2.0%.
（6）Leather neutral sizing prepared by the present invention, paper is without the paper defects such as paper folding, impression, foreign matter.
（7）Leather neutral sizing prepared by the present invention, quantitative difference of banner are 2-3 g/m2；Tightness is 0.75~0.85g/cm
³；Dust is 8-20/㎡；Moisture is 4-5%.
In the process step of the invention reagent used and equipment be in existing paper production line known reagent with setting
It is standby.
Embodiment
For purposes of illustration only, the leather neutral sizing paper technology of invention is elaborated below.
Embodiment 1：A kind of preparation technology of leather neutral sizing
Comprise the following steps：
1st, slurrying
The preparation of preparation and short stock including long stuff；
The preparation of the long stuff：By the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pass through
Hydrabrusher crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to long fibre and kowtows after-bay, and controls the pulp beating power to be
32 ° of 150kwh, beating consistency 4.1%, beating degree SR, long stuff is made.
The preparation of the short stock：It is 0.85mm bleached sulphate broad-leaved chopped fiber wood pulps by fibre length, passes through
Hydrabrusher crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to chopped fiber and kowtows after-bay, and controls the pulp beating power to be
33 ° of 120kwh, beating consistency 4.2%, beating degree SR, short stock is made.
2nd, mixing, papermaking：
Start Automatic batching equipment, press be pumped into long stuff and short stock to mixing pit, its medium-length fibre respectively
The suction amount ratio of slurry and short stock is 1：3, i.e. long stuff accounts for the 25% of mixing total amount, and short stock accounts for mixed
The 75% of total amount is closed, and fully mixes and stirs；
Mixed slurry is evacuated to by stock pump and destroies forebay, is well mixed, is transferred to header box, fan pump, desanding successively
Device desanding, the slurry after desanding are continuously added to AKD neutral sizing agents in one section of good slurry exit of desander, and its mass concentration is
15.2%th, ton paper dosage is 10kg, is then purified again by pressurized screen, the slurry after purification is transported into head box afterwards, is carried out
Paper pulp is manufactured paper with pulp, while it is 0.5% to control online mass concentration, finally carries out net forming, squeezes, dehydrates.
3rd, surface size boils
（1）The preparation of starch fluid
Add water 3600kg to surface glue dissolving tank, start stirring, slowly input is prepared by corn flour into dissolving tank
Denaturation oxidized starch 400kg, charging rate 15kg/min, stir, temperature is from 25 DEG C with 4 DEG C per minute of speed liter
Up to 60 DEG C, kept for 10 minutes, continue to be warming up to 98 DEG C, when temperature is raised to 98 DEG C with 2 DEG C per minute of speed, be incubated 15 points
Clock, reuse recirculated cooling water and cool to 60-65 DEG C, stir, filter, the starch fluid of concentration 9% is made, it is standby.
（2）The preparation of PVA lysates
2000kg water is added into decocting tank, stirring is started while adds 75kgPVA（Polyvinyl alcohol）Chip solid, temperature
50 DEG C are increased to from 25 DEG C with 5 DEG C per minute of speed, is kept for 10 minutes, continues to be warming up to 98 DEG C with 3 DEG C per minute of speed,
30min is incubated, until medicine is completely dissolved, starts stirring always, prevents crystallization from separating out, obtained PVA lysates, the PVA is molten
The concentration for solving liquid is 3.6%.
（3）Mixing
To step（1）In the starch fluid of preparation, 150kg PVA lysates are added, is well mixed, surface size is made.
PVA is added, purpose increases the film forming of surface glue, improves surface strength of paper and sophistication.
4th, top sizing
The above-mentioned surface size prepared is transported in sizing applicator with pump, page passes through from sizing applicator, sizing applicator pressure
In 0.25MPa, resin added is controlled in 4g/m2, top sizing is carried out, then by drying, rewinding for power control.
5th, first time rewinding, packaging
The control of rewinding speed per hour is in 400m/min, and quantitative control is in 130g/m2, and 2.8%, rewinding end face is neat for moisture control,
Paper is smooth, with the full bag paper bowl of plastic cloth, good seal, keeps paper bowl not contacted with the external world as far as possible.
6th, press polish
The good paper bowl of first time rewinding is subjected to press polish through supercalender, control paper is smooth >=30s, improves paper
Sophistication and appearance index, while banner thickness difference≤5% of strict control paper bowl, ensure paper bowl planarization；
The press polish, speed 95m/min, pressure 2MPa；
Paper bowl after press polish detects through total quality, particularly the detection of texture of paper, after qualified after testing, second
Leather neutral sizing is made into pony roll in rewinding.
7th, second of rewinding, packaging：
The control of rewinding speed per hour is in 200m/min, and quantitative control is in 130g/m2, and 4.0%, rewinding end face is neat for moisture control,
Paper is smooth, finally packs finished product.
By carrying out leading indicator detection to the leather neutral sizing of above-mentioned preparation method preparation, as a result such as institute in table 1
Show：
Table 1：The quality index of leather neutral sizing prepared by embodiment 1
It is described positive/negative, respectively positive and reverse side value, all measured values；
It can be seen that paper roughness 3.9um is excellent with the ratio for being higher by 9.30% from product the key technical indexes made from table 1
In other leather neutral sizing 4.3um numerical value, paper smooth 35/32 is better than other leather neutral sizings to be higher by 6.67% ratio
30s numerical value.Paper is breathed freely to be high by 44% compared with standard, and intensity is better than standard.Paper dries 5 minutes, paper is unchanged at 105 DEG C（This
Be by detected after client's overlay film and, client feedback and obtain）；Paper is without paper defect.
A kind of preparation technology of leather neutral sizing of embodiment 2
Comprise the following steps：
1st, slurrying：
（1）The preparation of long stuff：By the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pass through
Hydrabrusher crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to long fibre and kowtows after-bay, and controls the pulp beating power to be
36 ° of 170kwh, beating consistency 4.1%, beating degree SR, long stuff is made.
（2）The preparation of short stock：It is 0.85mm bleached sulphate broad-leaved chopped fiber wood pulps by fibre length, passes through water
Power pulper crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to chopped fiber and kowtows after-bay, and controls the pulp beating power to be
34 ° of 140kwh, beating consistency 4.3%, beating degree SR, short stock is made.
2nd, mixing, papermaking：
Start Automatic batching equipment, press be pumped into long stuff and short stock to mixing pit, its medium-length fibre respectively
The suction amount ratio of slurry and short stock is 1：6, i.e. long stuff accounts for the 14.3% of mixing total amount, and short stock accounts for
The 85.7% of mixing total amount, and fully mix and stir.
Mixed slurry is evacuated to by stock pump and destroies forebay, is well mixed, is transferred to header box, fan pump, desanding successively
Device desanding, the slurry after desanding are continuously added to AKD neutral sizing agents in one section of good slurry exit of desander, and its mass concentration is
15.2%th, ton paper dosage is 12kg, is then purified again by pressurized screen, the slurry after purification is transported into head box afterwards, is carried out
Paper pulp is manufactured paper with pulp, while it is 1.3% to control online mass concentration, finally carries out net forming, squeezes, dehydrates.
3rd, surface size boils
（1）The preparation of starch fluid
Add water 3600kg to surface glue dissolving tank, start stirring, slowly input is prepared by corn flour into dissolving tank
Denaturation oxidized starch 500kg, charging rate 17kg/min, stir, temperature is from 25 DEG C with 4 DEG C per minute of speed liter
Up to 60 DEG C, kept for 10 minutes, continue to be warming up to 98 DEG C, when temperature is raised to 98 DEG C with 2 DEG C per minute of speed, be incubated 15 points
Clock, reuse recirculated cooling water and cool to 60-65 DEG C, stir, filter, the starch fluid of concentration 10% is made, it is standby.
（2）The preparation of PVA lysates
2000kg water is added into decocting tank, stirring is started while adds 75kgPVA（Polyvinyl alcohol）Chip solid, temperature
50 DEG C are increased to from 25 DEG C with 5 DEG C per minute of speed, is kept for 10 minutes, continues to be warming up to 98 DEG C with 3 DEG C per minute of speed,
30min is incubated, until medicine is completely dissolved, starts stirring always, prevents crystallization from separating out, obtained PVA lysates；The PVA is molten
The concentration for solving liquid is 3.6%.
（3）Mixing
To step（1）150kg PVA lysates are added in the starch fluid of preparation, is well mixed with surface glue, surface is made
Glue application solution.PVA is added, purpose increases the film forming of surface glue, improves surface strength of paper and sophistication.
4th, top sizing
The above-mentioned surface size prepared is transported in sizing applicator with pump, page passes through from sizing applicator, sizing applicator pressure
In 0.35MPa, resin added is controlled in 6g/m2, top sizing is carried out, then by drying, rewinding for power control.
5th, first time rewinding, packaging
The control of rewinding speed per hour is in 400m/min, and quantitative control is in 132g/m2, and 3.0%, rewinding end face is neat for moisture control,
Paper is smooth, with the full bag paper bowl of plastic cloth, good seal, keeps paper bowl not contacted with the external world as far as possible.
6th, press polish
The good paper bowl of rewinding is subjected to press polish through supercalender, control paper is smooth >=30s, improves the sophistication of paper
And appearance index, while banner thickness difference≤3% of strict control paper bowl, ensure paper bowl planarization；
The press polish, speed 102m/min, pressure 2.8MPa；
Paper bowl after press polish detects through total quality, particularly the detection of texture of paper, after qualified after testing, rewinding into
Pony roll, leather neutral sizing is made.
7th, second of rewinding, packaging：
The control of rewinding speed per hour is in 200m/min, and quantitative control is in 132g/m2, and 4.5%, rewinding end face is neat for moisture control,
Paper is smooth, finally packs finished product.
By carrying out leading indicator detection to the leather neutral sizing of above-mentioned preparation method preparation, as a result such as institute in table 2
Show：
Table 2：The quality index of leather neutral sizing prepared by embodiment 2
It can be seen that paper roughness 2.5um is excellent with the ratio for being higher by 41.86% from product the key technical indexes made from table 2
In other leather neutral sizing 4.3um numerical value, paper smoothness 60/50 is better than the release original of other leathers to be higher by 66.67% ratio
Paper 30s numerical value, paper are breathed freely to be high by 17% compared with standard, and intensity is higher than example 1 better than standard；Paper dries 5 minutes, paper at 105 DEG C
Face is unchanged（Client's overlay film detects）；Paper is without paper defect.
Embodiment 3：A kind of preparation technology of leather neutral sizing
Comprise the following steps：
1st, slurrying：
（1）The preparation of long stuff：By the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pass through
Hydrabrusher crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to long fibre and kowtows after-bay, and controls the pulp beating power to be
40 ° of 190kwh, beating consistency 4.1%, beating degree SR, long stuff is made.
（2）The preparation of short stock：It is 0.85mm bleached sulphate broad-leaved chopped fiber wood pulps by fibre length, passes through water
Power pulper crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to chopped fiber and kowtows after-bay, and controls the pulp beating power to be
35 ° of 140kwh, beating consistency 4.5%, beating degree SR, short stock is made.
2nd, mixing, papermaking：
Start Automatic batching equipment, press be pumped into long stuff and short stock to mixing pit, its medium-length fibre respectively
The suction amount ratio of slurry and short stock is 1：7, i.e. long stuff accounts for the 12.5% of mixing total amount, and short stock accounts for
The 87.5% of mixing total amount, and fully mix and stir.
Mixed slurry is evacuated to by stock pump and destroies forebay, is well mixed, is transferred to header box, fan pump, desanding successively
Device desanding, the slurry after desanding are continuously added to AKD neutral sizing agents in one section of good slurry exit of desander, and its mass concentration is
15.2%th, ton paper dosage is 15kg, is then purified again by pressurized screen, the slurry after purification is transported into head box afterwards, is carried out
Paper pulp is manufactured paper with pulp, while it is 1.5% to control online mass concentration, finally carries out net forming, squeezes, dehydrates.
3rd, surface size boils
（1）The preparation of starch fluid
Add water 3600kg to surface glue dissolving tank, start stirring, slowly input is prepared by corn flour into dissolving tank
Denaturation oxidized starch 500kg, charging rate 18kg/min, stir, temperature is from 25 DEG C with 4 DEG C per minute of speed liter
Up to 60 DEG C, kept for 10 minutes, continue to be warming up to 98 DEG C, when temperature is raised to 98 DEG C with 2 DEG C per minute of speed, be incubated 15 points
Clock, reuse recirculated cooling water and cool to 60-65 DEG C, stir, filter, the starch fluid of concentration 10% is made, it is standby.
（2）The preparation of PVA lysates
2000kg water is added into decocting tank, stirring is started while adds 75kgPVA（Polyvinyl alcohol）Chip solid, temperature
50 DEG C are increased to from 25 DEG C with 5 DEG C per minute of speed, is kept for 10 minutes, continues to be warming up to 98 DEG C with 3 DEG C per minute of speed,
30min is incubated, until medicine is completely dissolved, starts stirring always, prevents crystallization from separating out, obtained PVA lysates；The PVA is molten
The concentration for solving liquid is 3.6%.
（3）Mixing
To step（1）150kg PVA lysates are added in the starch fluid of preparation, is well mixed with surface glue, surface is made
Glue application solution.PVA is added, purpose increases the film forming of surface glue, improves surface strength of paper and sophistication.
4th, top sizing
The above-mentioned surface size prepared is transported in sizing applicator with pump, page passes through from sizing applicator, sizing applicator pressure
In 0.37MPa, resin added is controlled in 8g/m2, top sizing is carried out, then by drying, rewinding for power control.
5th, first time rewinding, packaging
The control of rewinding speed per hour is in 400m/min, and quantitative control is in 150g/m2, and 3.2%, rewinding end face is neat for moisture control,
Paper is smooth, with the full bag paper bowl of plastic cloth, good seal, keeps paper bowl not contacted with the external world as far as possible.
6th, press polish
The good paper bowl of rewinding is subjected to press polish through supercalender, control paper is smooth >=30s, improves the sophistication of paper
And appearance index, while banner thickness difference≤4.0% of strict control paper bowl, ensure paper bowl planarization；
The press polish, speed 103m/min, pressure 4MPa；
Paper bowl after press polish detects through total quality, particularly the detection of texture of paper, after qualified after testing, rewinding into
Pony roll, leather neutral sizing is made.
7th, second of rewinding, packaging：
The control of rewinding speed per hour is in 200m/min, and quantitative control is in 150g/m2, and 5.0%, rewinding end face is neat for moisture control,
Paper is smooth, finally packs finished product.
By carrying out leading indicator detection to the leather neutral sizing of above-mentioned preparation method preparation, as a result such as institute in table 3
Show：
Table 3：The quality index of leather neutral sizing prepared by embodiment 3
It can be seen that paper roughness 2.5um is excellent with the ratio for being higher by 41.86% from product the key technical indexes made from table 3
In other leather neutral sizing 4.3um numerical value, paper smoothness 55/40 is better than the release original of other leathers to be higher by 33.33% ratio
Paper 30s numerical value, paper is ventilative and deformation is suitable with standard, and intensity is better than standard；Paper dries 5 minutes, paper is without change at 105 DEG C
Change（Client's overlay film detects）；Paper is without paper defect.
Embodiment 4：A kind of preparation technology of leather neutral sizing
Comprise the following steps：
1st, slurrying：
（1）The preparation of long stuff：By the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pass through
Hydrabrusher crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to long fibre and kowtows after-bay, and controls the pulp beating power to be
32 ° of 160kwh, beating consistency 4.1%, beating degree SR, long stuff is made.
（2）The preparation of short stock：It is 0.85mm bleached sulphate broad-leaved chopped fiber wood pulps by fibre length, passes through
Hydrabrusher crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to chopped fiber and kowtows after-bay, and controls the pulp beating power to be
38 ° of 145kwh, beating consistency 4.5%, beating degree SR, short stock is made.
2nd, mixing, papermaking：
Start Automatic batching equipment, press be pumped into long stuff and short stock to mixing pit, its medium-length fibre respectively
The suction amount ratio of slurry and short stock is 1：3, i.e. long stuff accounts for the 25% of mixing total amount, and short stock accounts for mixed
The 75% of total amount is closed, and fully mixes and stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, is well mixed, is transferred to header box, fan pump, desanding successively
Device desanding, the slurry after desanding are continuously added to AKD neutral sizing agents in one section of good slurry exit of desander, and its mass concentration is
15.2%th, ton paper dosage is 12kg, is then purified again by pressurized screen, the slurry after purification is transported into head box afterwards, is carried out
Paper pulp is manufactured paper with pulp, while it is 1.5% to control online mass concentration, finally carries out net forming, squeezes, dehydrates.
3rd, surface size boils
（1）The preparation of starch fluid
Add water 3600kg to surface glue dissolving tank, start stirring, slowly input is prepared by corn flour into dissolving tank
Denaturation oxidized starch 500kg, charging rate 18kg/min, stir, temperature is from 25 DEG C with 4 DEG C per minute of speed liter
Up to 60 DEG C, kept for 10 minutes, continue to be warming up to 98 DEG C, when temperature is raised to 98 DEG C with 2 DEG C per minute of speed, be incubated 15 points
Clock, reuse recirculated cooling water and cool to 60-65 DEG C, stir, filter, the starch fluid of concentration 10% is made, it is standby.
（2）The preparation of PVA lysates
2000kg water is added into decocting tank, stirring is started while adds 75kgPVA (polyvinyl alcohol) chip solid, temperature
50 DEG C are increased to from 25 DEG C with 5 DEG C per minute of speed, is kept for 10 minutes, continues to be warming up to 98 DEG C with 3 DEG C per minute of speed,
30min is incubated, until medicine is completely dissolved, starts stirring always, prevents crystallization from separating out, obtained PVA lysates；The PVA is molten
The concentration for solving liquid is 3.6%.
（3）Mixing
To step（1）The PVA lysates that 150kg is added in starch fluid are made, is well mixed with surface glue, surface is made and applies
Glue.PVA is added, purpose increases the film forming of surface glue, improves surface strength of paper and sophistication.
4th, top sizing
The above-mentioned surface size prepared is transported in sizing applicator with pump, page passes through from sizing applicator, sizing applicator pressure
In 0.35MPa, resin added is controlled in 5g/m2, top sizing is carried out, then by drying, rewinding for power control.
5th, first time rewinding, packaging
The control of rewinding speed per hour is in 400m/min, and quantitative control is in 132g/m2, and 3.4%, rewinding end face is neat for moisture control,
Paper is smooth, with the full bag paper bowl of plastic cloth, good seal, keeps paper bowl not contacted with the external world as far as possible.
6th, press polish
The good paper bowl of rewinding is subjected to press polish through supercalender, control paper is smooth >=30s, improves the sophistication of paper
And appearance index, while banner thickness difference≤4.5% of strict control paper bowl, ensure paper bowl planarization；
The press polish, speed 106m/min, pressure 4.5MPa；
Paper bowl after press polish detects through total quality, particularly the detection of texture of paper, after qualified after testing, rewinding into
Pony roll, leather neutral sizing is made.
7th, second of rewinding, packaging：
The control of rewinding speed per hour is in 200m/min, and quantitative control is in 132g/m2, and 4.0%, rewinding end face is neat for moisture control,
Paper is smooth, finally packs finished product.
By carrying out leading indicator detection to the leather neutral sizing of above-mentioned preparation method preparation, as a result such as institute in table 4
Show：
Table 4：The quality index of leather neutral sizing prepared by embodiment 4
It can be seen that paper roughness 3.0um is excellent with the ratio for being higher by 30.23% from product the key technical indexes made from table 4
In other leather neutral sizing 4.3um numerical value, paper smoothness 45/33 is better than other leather neutral sizings to be higher by 10% ratio
30s numerical value, paper is ventilative to maintain an equal level with standard, and intensity is better than standard.Paper dries 5 minutes, paper is unchanged at 105 DEG C（Client is covered
Film detection can obtain）.Paper is without paper defect.
Embodiment 5：A kind of preparation technology of leather neutral sizing
Comprise the following steps：
1st, slurrying：
（1）The preparation of long stuff：By the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pass through
Hydrabrusher crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to long fibre and kowtows after-bay, and controls the pulp beating power to be
34 ° of 170kwh, beating consistency 4.1%, beating degree SR, long stuff is made.
（2）The preparation of short stock：It is 0.85mm bleached sulphate broad-leaved chopped fiber wood pulps by fibre length, passes through water
Power pulper crushes and is transferred to and kowtows forebay, grinds beater by double plate, is transferred to chopped fiber and kowtows after-bay, and controls the pulp beating power to be
35 ° of 140kwh, beating consistency 4.1%, beating degree SR, short stock is made.
2nd, mixing, papermaking：
Start Automatic batching equipment, press be pumped into long stuff and short stock to mixing pit, its medium-length fibre respectively
The suction amount ratio of slurry and short stock is 1：4, i.e. long stuff accounts for the 20% of mixing total amount, and short stock accounts for mixed
The 80% of total amount is closed, and fully mixes and stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, is well mixed, is transferred to header box, fan pump, desanding successively
Device desanding, the slurry after desanding are continuously added to AKD neutral sizing agents in one section of good slurry exit of desander, and its mass concentration is
15.2%th, ton paper dosage is 12kg, is then purified again by pressurized screen, the slurry after purification is transported into head box afterwards, is carried out
Paper pulp is manufactured paper with pulp, while it is 0.9% to control online mass concentration, finally carries out net forming, squeezes, dehydrates.
3rd, surface size boils
（1）The preparation of starch fluid
Add water 3600kg to surface glue dissolving tank, start stirring, slowly input is prepared by corn flour into dissolving tank
Denaturation oxidized starch 600kg, charging rate 20kg/min, stir, temperature is from 25 DEG C with 4 DEG C per minute of speed liter
Up to 60 DEG C, kept for 10 minutes, continue to be warming up to 98 DEG C, when temperature is raised to 98 DEG C with 2 DEG C per minute of speed, be incubated 15 points
Clock, reuse recirculated cooling water and cool to 60-65 DEG C, stir, filter, the starch fluid of concentration 11% is made, it is standby.
（2）The preparation of PVA lysates
2000kg water is added into decocting tank, stirring is started while adds 75kgPVA（Polyvinyl alcohol）Chip solid, temperature
50 DEG C are increased to from 25 DEG C with 5 DEG C per minute of speed, is kept for 10 minutes, continues to be warming up to 98 DEG C with 3 DEG C per minute of speed,
30min is incubated, until medicine is completely dissolved, starts stirring always, prevents crystallization from separating out, obtained PVA lysates；The PVA is molten
Solve liquid, concentration 3.6%.
（3）Mixing
To step（1）150kg PVA lysates are added in the starch fluid of preparation, is well mixed with surface glue, surface is made
Glue application solution；PVA is added, purpose increases the film forming of surface glue, improves surface strength of paper and sophistication.
4th, top sizing
The above-mentioned surface size prepared is transported in sizing applicator with pump, page passes through from sizing applicator, sizing applicator pressure
In 0.5MPa, resin added is controlled in 6g/m2, top sizing is carried out, then by drying, rewinding for power control.
5th, first time rewinding, packaging
The control of rewinding speed per hour is in 400m/min, and quantitative control is in 150g/m2, and 3.5%, rewinding end face is neat for moisture control,
Paper is smooth, with the full bag paper bowl of plastic cloth, good seal, keeps paper bowl not contacted with the external world as far as possible.
6th, press polish
The good paper bowl of rewinding is subjected to press polish through supercalender, control paper is smooth >=30s, improves the sophistication of paper
And appearance index, while banner thickness difference≤5% of strict control paper bowl, ensure paper bowl planarization；
The press polish, speed 109m/min, pressure 5MPa；
Paper bowl after press polish detects through total quality, particularly the detection of texture of paper, after qualified after testing, rewinding into
Pony roll, leather neutral sizing is made.
7th, second of rewinding, packaging：
The control of rewinding speed per hour is in 200m/min, and quantitative control is in 150g/m2, and 4.2%, rewinding end face is neat for moisture control,
Paper is smooth, finally packs finished product.
By carrying out leading indicator detection to the leather neutral sizing of above-mentioned preparation method preparation, as a result such as institute in table 5
Show：
Table 5：The quality index of leather neutral sizing prepared by embodiment 5
It can be seen that paper roughness 3.5um is excellent with the ratio for being higher by 18.60% from product the key technical indexes made from table 5
In other leather neutral sizing 4.3um numerical value, paper smoothness 50/40 is better than the release original of other leathers to be higher by 33.33% ratio
Paper 30s numerical value, paper are breathed freely to be high by 6% compared with standard, and intensity is better than standard, and paper dries 5 minutes, paper is unchanged at 105 DEG C（Visitor
Family detection can obtain）, paper is without paper defect.
Pass through the raw material in the testing result and production preparation process of the leather neutral sizing prepared to embodiment 1~5
Consider on loss, manufacturing process and production cost, leather neutral sizing and preparation method thereof is one prepared by embodiment 2
The optimal technical scheme of kind.
The PVA lysate additions single factor analysis of embodiment 6 is tested
Using the preparation technology of the leather neutral sizing described in embodiment 2, only change step 4, top sizing, PVA dissolvings
The addition of liquid, single factor analysis experiment is carried out, and detect the performance indications of the paper of preparation, experimental result is shown in Table 6.
The PVA lysate additions single factor analysis of table 6 is tested
It was found from the experiment of above-mentioned single factor analysis, step 4, top sizing, when the addition of PVA lysates is 150kg, it is
Optimal addition.
The calendaring step blocking factor of embodiment 11 is analyzed
Take the preparation technology of the leather neutral sizing described in embodiment 2, only change step 6 press polish, the speed of press polish and
Pressure, double factor analysis is carried out, and detect the performance indications of the paper of preparation, the results are shown in Table 7.
The calendaring step blocking factor of table 7 is analyzed
Analyzed by above-mentioned press polish blocking factor, it is known that, most preferred technical scheme is that press polish speed is in calendaring step
102m/min；Calendering pressure is 2.8MPa.
A kind of preparation technology of leather neutral sizing of comparative example
Take the preparation technology of the leather neutral sizing described in embodiment 2, only change step 3, surface size boils
Step, PVA lysates are added without, are specifically changed into：
" 3, surface size boils
Add water 3600kg to surface glue dissolving tank, start stirring, slowly input is prepared by corn flour into dissolving tank
Denaturation oxidized starch 500kg, stir, slowly heating boil, when temperature is raised to 98 DEG C, be incubated 15 minutes, reuse and follow
Ring cooling water temperature stirs to 60-65 DEG C, filtering, and the starch fluid of concentration 10% is made, standby；”
Paper prepared by comparative example, property indices are tested, are shown in Table 8.
Leather neutral sizing property indices prepared by the comparative example of table 8
By test of many times, following technical scheme can realize the object of the invention：
A kind of preparation technology of leather neutral sizing includes slurrying, mixing, papermaking, press polish, that the leather is made in rewinding is release
Body paper, packed afterwards, neutral sizing agent is added during the papermaking.
Concrete technology step is as follows：
1st, slurrying：
（1）The preparation of long stuff：Bleached sulphate needle long fibre wood pulp by fibre length for 2.5~2.7mm,
Crush to be transferred to by hydrabrusher and kowtow forebay, grind beater by double plate, be transferred to long fibre and kowtow after-bay, and control pulp beating power
In 260 ± 20A, beating consistency be 4.0~4.3%, beating degree, 32~40 ° of SR for 150~190kwh, mashing current control, it is obtained
Long stuff.
（2）The preparation of short stock：It is 0.75~0.9mm bleached sulphate broad-leaved chopped fiber wood pulps by fibre length,
Crush to be transferred to by hydrabrusher and kowtow forebay, grind beater by double plate, be transferred to chopped fiber and kowtow after-bay, and control pulp beating power
In 260 ± 20A, beating consistency it is that 4.2~4.5%, beating degree, 33~38 ° of SR are made for 120~145kwh, mashing current control
Short stock.
2nd, mixing, papermaking：
Start Automatic batching equipment, press be pumped into long stuff and short stock to mixing pit, its medium-length fibre respectively
The suction amount ratio of slurry and short stock is 1:3~7, i.e. long stuff accounts for the 25~12.5% of mixing total amount, chopped fiber
Slurry accounts for the 75~87.5% of mixing total amount, and fully mixes and stir.
Mixed slurry is evacuated to by stock pump and destroies forebay, is well mixed, is transferred to header box, fan pump, desanding successively
Device desanding, slurry after desanding are continuously added to AKD neutral sizing agents in one section of good slurry exit of desander, its concentration is 15.2%,
Ton paper dosage is 10-16kg, is then purified again by pressurized screen, and the slurry after purification is transported into head box afterwards, carries out paper
Slurry is manufactured paper with pulp, while it is 0.5~1.5% to control online concentration, finally carries out net forming, squeezes, dehydrates.
3rd, surface size boils
（1）The preparation of starch fluid
Add water 3600kg to surface glue dissolving tank, start stirring, slowly input is prepared by corn flour into dissolving tank
Denaturation oxidized starch 400-600kg, charging rate 15-20kg/min, stir, temperature is from 25 DEG C with 4 DEG C per minute
Speed be increased to 60 DEG C, kept for 10 minutes, continue to be warming up to 98 DEG C, when temperature is raised to 98 DEG C with 2 DEG C per minute of speed, protect
Temperature 15 minutes, reuses recirculated cooling water and cools to 60-65 DEG C, stir, and filters, and concentration 9-11% starch fluid is made, standby
With.
（2）Prepare PVA lysates
PVA（Polyvinyl alcohol）Boil, 2000kg water is added into decocting tank, stirring is started while adds 75kgPVA pieces
Shape solid, temperature are increased to 50 DEG C from 25 DEG C with 5 DEG C per minute of speed, are kept for 10 minutes, continued with 3 DEG C per minute of speed
It is warming up to 98 DEG C, is incubated 30min, until medicine is completely dissolved, starts stirring always, prevent crystallization from separating out, prepare PVA and dissolve
Liquid；The concentration of the PVA lysates is 3.6%.
（3）Mixing
150kg PVA lysates are added into starch fluid, is well mixed with surface glue, surface size is made.Add
PVA, purpose increase the film forming of surface glue, improve surface strength of paper and sophistication.
4th, top sizing
The above-mentioned surface size prepared is transported in sizing applicator with pump, page passes through from sizing applicator, sizing applicator pressure
In 0.25~0.6MPa, resin added is controlled in 4~8g/m2, top sizing is carried out, then by drying, rewinding for power control.
5th, first time rewinding, packaging, press polish
The control of rewinding speed per hour is in 400m/min, and in 130~150g/m2, moisture control is multiple 3.0~4.5% for quantitative control
Volume end face is neat, and paper is smooth, with the full bag paper bowl of plastic cloth, good seal, keeps paper bowl not contacted with the external world as far as possible.
6th, press polish
The good paper bowl of rewinding is subjected to press polish through supercalender, control paper is smooth >=30s, improves the sophistication of paper
And appearance index, while banner thickness difference≤3-5% of strict control paper bowl, ensure paper bowl planarization；
The press polish, speed 95-110m/min, pressure 2-5MPa；
Paper bowl after press polish detects through total quality, particularly the detection of texture of paper, after qualified after testing, rewinding into
Pony roll, leather neutral sizing is made.
7th, second of rewinding, packaging：
The control of rewinding speed per hour is in 200m/min, and in 130~150g/m2, moisture control is multiple 4.0~5.0% for quantitative control
Volume end face is neat, and paper is smooth, finally packs finished product.
It is of the present invention positive/negative, respectively positive and reverse side value, all measured values
Unless specifically indicated, the ratio that the present invention takes, is mass ratio, the percentage of use, is quality percentage
Than.
The present invention by rational mill by from external high-quality paper pulp, being beaten, making to be tightly combined between fiber, be made
After body paper, there is preferable mechanical strength, it is anti-tear, drawing property is good；By adding neutral gum, paper pulp is fully combined with auxiliary agent, make
After obtaining body paper, paper has good hygroscopicity value；By in surface size, adding denaturation oxidized starch and PVA, body paper is made
Afterwards, can have preferable surface property, water repelling property and special property；When body paper produces, by stabilizing speed, control it is quantitative and
Moisture, the pressure of press section is adjusted, there is uniformity consistency；Control paper pulp is manufactured paper with pulp online concentration, is avoided because slurry concentration is high, fine
Dimension is easily wadded a quilt with cotton poly- again, and the dehydration of wire-cloth is too fast, and dehydration is very fierce, and fiber loss is bigger, and dehydration is too anxious to cause paper sheet formation not
The problem of good；After body paper production, after calender press polish processing, paper is had good surface sophistication and smoothness, improve
The appearance index of paper；Detected simultaneously from texture of paper index, prevent paper from the paper defects such as paper folding, impression, foreign matter occur.
In the above-described embodiments, the preferred forms of the present invention are described, it is obvious that in the invention structure of the present invention
Under think of, many changes can be still made.Here, it should be noted that any change made under the inventive concept of the present invention all will
Fall within the scope of protection of the present invention.
Claims (4)
- A kind of 1. leather neutral sizing, it is characterised in that：The leather neutral sizing, quantification of 132g/m2, paper surface are coarse It is 1.5 μm to spend Ra；The leather neutral sizing, the smoothness of positive and negative is respectively 60s, 50s, and horizontal tearability is 1600mN；Longitudinal direction is dry anti- Zhang Qiangdu is 130N/15mm；Horizontal dry tensile strength is 88N/15mm；Folding number is 88 times, bursting strength 380kPa；The preparation technology of the body paper, include the preparation of long stuff, the preparation of short stock, mix, papermaking,Surface size boils, first time rewinding, press polish, second of rewinding；The preparation of the long stuff, 36 ° of beating consistency 4.1%, beating degree SR；The preparation of the short stock, 34 ° of beating consistency 4.3%, beating degree SR；The suction amount ratio of the mixing, papermaking, long stuff and short stock is 1：6；Mixed slurry is added AKD neutral sizing agents, its mass concentration is 15.2%, ton paper dosage is 12kg, and it is 1.3% to control online mass concentration；The surface size boils, including the preparation of starch fluid, the preparation of PVA lysates, mixing；The preparation of the starch fluid, add water 3600kg, put into the denaturation oxidized starch 500kg being prepared by corn flour, be made The starch fluid of concentration 10%；The preparation of the PVA lysates, 2000kg water is added, start stirring while add 75kgPVA chip solids, temperature is from 25 DEG C it is increased to 50 DEG C with 5 DEG C per minute of speed, is kept for 10 minutes, continue to be warming up to 98 DEG C with 3 DEG C per minute of speed, insulation 30min, until medicine is completely dissolved, PVA lysates are made；The concentration of the PVA lysates is 3.6%；The mixing, 150kg PVA lysates are added in starch fluid, surface size is made；The first time rewinding, the control of rewinding speed per hour are controlled 3.0% in 400m/min, quantitative control in 132g/m2, moisture；The press polish, control paper is smooth >=30s, controls banner thickness difference≤3% of paper bowl；Speed is 102m/min, and pressure is 2.8MPa；Second of rewinding, the control of rewinding speed per hour are controlled 4.5% in 200m/min, quantitative control in 132g/m2, moisture.
- A kind of 2. preparation technology of leather neutral sizing according to claim 1, it is characterised in that：The system of the starch fluid It is standby, add water 3600kg, under 400r/min stirring, add denaturation oxidized starch 500kg, charging rate 17kg/min, stir Mix uniformly, temperature is increased to 60 DEG C from 25 DEG C with 4 DEG C per minute of speed, is kept for 10 minutes, continued with 2 DEG C per minute of speed 98 DEG C, when temperature is raised to 98 DEG C are warming up to, 15 minutes is incubated, reuses recirculated cooling water and cool to 60-65 DEG C, stir, Filtering, dense 10% starch fluid is made.
- A kind of 3. preparation technology of leather neutral sizing according to claim 1, it is characterised in that：The technique, including Top sizing, the top sizing, Stress control are controlled in 6g/m2 in 0.35MPa, resin added.
- A kind of 4. preparation technology of leather neutral sizing according to claim 1, it is characterised in that：The technique, is also wrapped Include slurrying, mixing, papermaking；The slurrying, the bleached sulphate needle long fibre wood pulp by fibre length for 2.5mm, through crushing Afterwards, control pulp beating power for 170kWh, be beaten current control in 36 ° of 260 ± 20A, beating consistency 4.1%, beating degree SR, system Obtain long stuff；It is 0.85mm bleached sulphate broad-leaved chopped fiber wood pulps by fibre length, after crushing, and controls mashing Power is 140kWh, short stock is made in 34 ° of 260 ± 20A, beating consistency 4.3%, beating degree SR in mashing current control.
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