CN104032626B - The white kraft paper of a kind of dipping and preparation technology thereof - Google Patents
The white kraft paper of a kind of dipping and preparation technology thereof Download PDFInfo
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Abstract
The invention provides and a kind of impregnate white kraft paper, the quantification of 105 ~ 195g/m2 of the white kraft paper of this dipping, quantitative difference of banner≤5 g/m2, tightness are 0.6 ~ 0.7g/cm3, smoothness is 6/8S, horizontal tearability >=1600mN, longitudinal dry tensile strength >=90N/15mm, horizontal dry tensile strength >=50N/15mm, longitudinal wet tensile strength >=20N/15mm, horizontal wet tensile (strength) >=15N/15mm, hygroscopicity value >=160g/m2；The preparation technology of the white kraft paper of this dipping includes slurrying, mixing, papermaking, rewinding, packaging, adds wet strength agent and filler, it is further provided the quality of the patented product in described papermaking operation.The present invention has the white kraft paper of a kind of dipping and preparation technology thereof, and this technique passes through process modification, can improve the defect that dipping is not saturating and the advantage with even dyeing.
Description
Technical field
The present invention relates to pulp technology for making paper, particularly relate to the white kraft paper of a kind of dipping and preparation technology thereof.
Background technology
Impregnate white kraft paper also known as water suction white kraft paper, leatherette paper body paper.Processing through post-treatment is the ornament materials paper using of a kind of top grade, saturated bright-coloured, the not fugitive color of color, and paper is soft, good toughness, anti-tear, drawing property is good, anti-scratch flower, easy gluing, easy to attach, is provided simultaneously with noble quality and the texture of corium, and price compares corium and PU is cheap.Paper contaminates completely thoroughly, can prevent from mounting dew limit on zygote, it appears the box associative perception worked it out is strong, and lines are regular attractive in appearance.
Domestic dipping white kraft paper replacement import finished paper of processing only has about 2 years, mainly on high-grade covers of notebook, particularly does artificial leather carrier at paper using replacement non-woven fabrics and just attempts, and it is huge that then demand is opened in popularization.
Impregnating the white kraft paper characteristic with its uniqueness, part domestic manufacturer is difficult to copy, and whole market finished paper demand relies on external import substantially, and annual requirement is bigger.Along with being rooted in the hearts of the people of high-grade packaging material, increasing producer selects to impregnate the downstream product of white cattle paper.
Impregnating white kraft paper demand at present day by day to increase severely, domestic only little enterprise can produce.And our factory has carried out long-term exchange and cooperation with a domestic producer, form product-feed and replace imported product, in service of goods and market development etc., there is obvious advantage.We are also in other markets of positive developing simultaneously, use and impregnate white kraft paper replacement non-woven fabrics processing artificial leather, have sufficient price and quality-advantage.It is participated in market competition for enterprise, widens Sales Channel and lays a good foundation.Dipping finished paper can replace some Imported paper and increase foreign exchange earnings from exports, and improves company's breed structure, improves competitiveness in the international market and occupation rate.After the project implementation, the product diversification of art paper company can be increased, accelerate enterprise's speciality paper differentiation strategy process.
Impregnate the one that white kraft paper is white kraft paper, surface free applying glue, be applicable to dyeing and impregnation process, through dye system with soften into shades of colour fill skin base stock, Shi Ge speciality paper producer makes the raw material paper of leatherette paper.Its quality height directly determines the main performance index such as pliability and the folding strength of leatherette paper manufactured goods.
In kraft paper manufacturing, common problem is at present: during because of dipping ink, and for ensureing that dyeing is fully, uniformly, inside can not show money or valuables one carries unintentionally, so process velocity is slower, in ink pond, the persistent period is longer, and the wet epistasis of existing kraft paper is low, disconnected paper phenomenon often occurs；Sheet softness and bulk are poor, and after embossing or painting PU, the sensory effect of corium is poor；Dust is more, and when dipping light color, dust affects quality；Paper cobb value is low, pliability is poor, air permeability is little；The dyeing of paper is uniform not, infiltration is incomplete；Paper is done, wet strength is poor, and broken end occurs in paper coloring operating, resistance to broken poor with folding strength.
Summary of the invention
The technical problem to be solved in the present invention is the weak point existing for prior art, it is provided that the white kraft paper of a kind of dipping and preparation technology thereof, and this technique passes through process modification, can improve the defect that dipping is not saturating and the advantage with even dyeing.
It is an object of the invention to substitute non-woven fabrics and do artificial leather carrier, impregnate the white kraft paper characteristic with its uniqueness, part domestic manufacturer is difficult to copy, and whole market finished paper demand relies on external import substantially, and annual requirement is bigger.Along with being rooted in the hearts of the people of high-grade packaging material, increasing producer selects to impregnate the downstream product of white cattle paper.Be applicable to dyeing and impregnation process, through dye system with soften into shades of colour fill skin base stock, Shi Ge speciality paper producer makes the raw material paper of leatherette paper.
The white kraft paper of a kind of dipping, the quantification of 105 ~ 195g/m2 of the white kraft paper of this dipping, quantitative difference of banner≤5g/m2.
As preferably, the tightness of the white kraft paper of described dipping is 0.6 ~ 0.7g/cm3, smoothness is 6/8S.
As preferably, the horizontal tearability >=1600mN of the white kraft paper of described dipping, longitudinal dry tensile strength >=90N/15mm, horizontal dry tensile strength >=50N/15mm, longitudinal wet tensile strength >=20N/15mm, horizontal wet tensile (strength) >=15N/15mm.
As preferably, the hygroscopicity value >=160g/m2 of the white kraft paper of described dipping, folding strength >=30 time, bursting strength >=180KPa, deformation rate≤2.5%, permeability are pass through moment.
A kind of preparation technology impregnating white kraft paper includes slurrying, mixing, papermaking, rewinding prepare the white kraft paper of this dipping, packs afterwards, adds wet strength agent and filler in described papermaking process.
Concrete technology step is as follows:
1, slurrying:
(1) preparation of long stuff: by the bleached sulphate needle long fibre wood pulp that fibre length is 2.5 ~ 2.7mm, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to long fibre and kowtow after-bay, and control pulp beating power be 150 ~ 180kwh, making beating electric current control 250 ± 30A, beating consistency be 4.0 ~ 4.3%, 24 ~ 25 ° of SR of beating degree, prepare long stuff.
(2) preparation of short stock: be 0.75 ~ 0.9mm bleached sulphate broad-leaved chopped fiber wood pulp by fibre length, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to chopped fiber and kowtow after-bay, and control pulp beating power be 120 ~ 145kwh, making beating electric current control 250 ± 30A, beating consistency be 4.0 ~ 4.3%, 22 ~ 23 ° of SR of beating degree prepare short stock.
2, mixing, papermaking:
Start Automatic batching equipment, respectively by suction long stuff and short stock to mixing pit, wherein long stuff is 3 ~ 1:2 ~ 1 with the suction amount ratio of short stock, namely long stuff accounts for the 60 ~ 50% of mixing total amount, short stock accounts for the 40 ~ 50% of mixing total amount, and fully mixed stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, mix homogeneously, proceed to header box successively, fan pump, desander desanding, slurry after desanding is continuously added to polyamides epoxy polyamine chloropropane wet strength agent in the good slurry exit of desander one section, its concentration is 14 ~ 17%, ton paper consumption is 44 ~ 46kg, before pressurized screen purifies, (pressurized screen import department) adds the above-mentioned filler prepared, the ton paper consumption of filler is 100kg, then purify then through pressurized screen, afterwards the slurry after purification is transported to head box, carry out paper pulp to manufacture paper with pulp, control online concentration is 0.7 ~ 1.2% simultaneously, finally carry out upper net forming, squeezing, after dehydrate, prepare page.
3, rewinding, packaging:
Rewinding speed per hour controls at 200m/min, and fixing quantity is at 105 ~ 194g/m2, and moisture Control is 4.1 ~ 4.4%, and rewinding end face is neat, and paper is smooth, and finally packaging prepares finished product.
As preferably, prepare filler standby: add water to filler dissolving tank, start stirring, first in dissolving tank, slowly put into light calcium carbonate powder, slowly putting into dicalcium powder again in dissolving tank, the weight ratio of the water added, dicalcium powder and light calcium carbonate powder is 4 ~ 5:1:1, it is ensured that mixing time more than 30 minutes, making it stir, the filler that final preparation concentration is 310 ~ 350g/L is standby.
Reagent used in the process step of the invention and equipment are known reagent and equipment in existing paper production line.
Beneficial effects of the present invention: by selecting domestic and international high-quality paper pulp, suitable addition filler, while reducing paper cost, meet customer need；By adding wet strength agent, make paper pulp fully be combined with auxiliary agent, after prepared body paper, there is good mechanical strength, anti-tear, drawing property good, anti-scratch flower and special property；When body paper produces, by stabilizing speed, controlling quantitative and moisture, adjust the pressure of press section, have dyeing fully, uniformly, paper has flexibility and bulk, just has the sensation of corium after embossing or painting PU；Control paper pulp to manufacture paper with pulp online concentration, it is to avoid because slurry concentration is low, the dehydration resistance of wire-cloth is little, and dehydration is very fierce, and fiber loss is relatively larger, and dehydration too suddenly causes the problem that paper sheet formation is bad.
One of the present invention impregnates white Corii Bovis seu Bubali paper technology, has technological process simple, and paper is soft, has elasticity, and product two sides water absorption is strong, and good tensile strength, folding strength, even dyeing is consistent.
Detailed description of the invention
For purposes of illustration only, below the white kraft paper paper technology of dipping of invention is elaborated.
Embodiment 1:
(1) filler is prepared standby:
Add water 6625kg to filler dissolving tank, start stirring, in dissolving tank, first slowly put into light calcium carbonate powder 1325kg, dicalcium powder 1325kg is slowly put into again in dissolving tank, guaranteeing mixing time more than 30 minutes so that it is stir, the filler that final preparation concentration is 310g/L is standby.
(2) a kind of preparation technology impregnating white kraft paper comprises the following steps:
1, slurrying:
(1) preparation of long stuff: by the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to long fibre and kowtow after-bay, and control pulp beating power to be 150kwh, beating consistency be 4.0%, 24 ° of SR of beating degree, prepare long stuff；
(2) preparation of short stock: be 0.85mm bleached sulphate broad-leaved chopped fiber wood pulp by fibre length, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to chopped fiber and kowtow after-bay, and control pulp beating power to be 120kwh, beating consistency be 4.1%, 23 ° of SR of beating degree, prepare short stock.
2, mixing, papermaking:
Start Automatic batching equipment, pressing suction long stuff and short stock respectively to mixing pit, wherein long stuff is 3:2 with the suction amount ratio of short stock, and namely long stuff accounts for the 60% of mixing total amount, short stock accounts for the 40% of mixing total amount, and fully mixed stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, mix homogeneously, proceed to header box successively, fan pump, desander desanding, slurry after desanding is continuously added to polyamides epoxy polyamine chloropropane wet strength agent in the good slurry exit of desander one section, its concentration is 14%, ton paper consumption is 44kg, before pressurized screen purifies, (pressurized screen import department) adds the above-mentioned filler prepared, the ton paper consumption of filler is 100kg, then purify then through pressurized screen, afterwards the slurry after purification is transported to head box, carry out paper pulp to manufacture paper with pulp, control online concentration is 0.7% simultaneously, finally carry out upper net forming, squeezing, after dehydrate, prepare page.
3, rewinding, packaging:
Rewinding speed per hour controls at 200m/min, and fixing quantity is at 105g/m2, and moisture Control is 4.2%, and rewinding end face is neat, and paper is smooth, and finally packaging prepares finished product.
The white Corii Bovis seu Bubali of dipping through prepared by the preparation method described in above-described embodiment 1 carries out leading indicator detection, and result is as shown in table 1: table 1:
The product the key technical indexes prepared from embodiment 1 can be seen that, folding relatively standard is high by 33%, and quantitative difference of banner controls better, and paper-forming evenness is good, and even dyeing is consistent.
Embodiment 2:
(1) filler is prepared standby:
Add water 6000kg to filler dissolving tank, start stirring, in dissolving tank, first slowly put into light calcium carbonate powder 1325kg, dicalcium powder 1325kg is slowly put into again in dissolving tank, guaranteeing mixing time more than 30 minutes so that it is stir, the filler that final preparation concentration is 340g/L is standby.
(2) a kind of preparation technology impregnating white kraft paper comprises the following steps:
1, slurrying:
(1) preparation of long stuff: by the bleached sulphate needle long fibre wood pulp that fibre length is 2.7mm, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to long fibre and kowtow after-bay, and control pulp beating power to be 170kwh beating consistency be 4.3%, 24 ° of SR of beating degree, prepare long stuff；
(2) preparation of short stock: be 0.75mm bleached sulphate broad-leaved chopped fiber wood pulp by fibre length, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to chopped fiber and kowtow after-bay, and control pulp beating power to be 130kwh, beating consistency be 4.2%, 23 ° of SR of beating degree, prepare short stock.
2, mixing, papermaking:
Start Automatic batching equipment, pressing suction long stuff and short stock respectively to mixing pit, wherein long stuff is 3:2 with the suction amount ratio of short stock, and namely long stuff accounts for the 60% of mixing total amount, short stock accounts for the 40% of mixing total amount, and fully mixed stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, mix homogeneously, proceed to header box successively, fan pump, desander desanding, slurry after desanding is continuously added to polyamides epoxy polyamine chloropropane wet strength agent in the good slurry exit of desander one section, its concentration is 15%, ton paper consumption is 45kg, before pressurized screen purifies, (pressurized screen import department) adds the above-mentioned filler prepared, the ton paper consumption of filler is 100kg, then purify then through pressurized screen, afterwards the slurry after purification is transported to head box, carry out paper pulp to manufacture paper with pulp, control online concentration is 0.75% simultaneously, finally carry out upper net forming, squeezing, after dehydrate, prepare page.
3, rewinding, packaging:
Rewinding speed per hour controls at 200m/min, and fixing quantity is at 110g/m2, and moisture Control is 4.1%, and rewinding end face is neat, and paper is smooth, and finally packaging prepares finished product.
The white Corii Bovis seu Bubali of dipping through prepared by the preparation method described in above-described embodiment 2 carries out leading indicator detection, and result is as shown in table 2:
Table 2:
The product the key technical indexes prepared from embodiment 2 can be seen that, longitudinally dry relatively standard is high by 22% by force, and horizontal tearability relatively standard is high by 6.7%, quantitative difference of banner 2g/m2, paper is smooth, and evenness dyes well uniformity.
Embodiment 3:
(1) filler is prepared standby:
Add water 6185kg to filler dissolving tank, start stirring, in dissolving tank, first slowly put into light calcium carbonate powder 1325kg, dicalcium powder 1325kg is slowly put into again in dissolving tank, guaranteeing mixing time more than 30 minutes so that it is stir, the filler that final preparation concentration is 330g/L is standby.
(2) a kind of preparation technology impregnating white kraft paper comprises the following steps:
1, slurrying:
(1) preparation of long stuff: by the bleached sulphate needle long fibre wood pulp that fibre length is 2.6mm, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to long fibre and kowtow after-bay, and to control pulp beating power be 155kwh, beating consistency is 4.1%, 25 ° of SR of beating degree, prepares long stuff；
(2) preparation of short stock: be 0.85mm bleached sulphate broad-leaved chopped fiber wood pulp by fibre length, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to chopped fiber and kowtow after-bay, and control pulp beating power to be 135kwh, beating consistency be 4.0%, 22 ° of SR of beating degree, prepare short stock.
2, mixing, papermaking:
Start Automatic batching equipment, pressing suction long stuff and short stock respectively to mixing pit, wherein long stuff is 1.2:1 with the suction amount ratio of short stock, and namely long stuff accounts for the 55% of mixing total amount, short stock accounts for the 45% of mixing total amount, and fully mixed stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, mix homogeneously, proceed to header box successively, fan pump, desander desanding, slurry after desanding is continuously added to polyamides epoxy polyamine chloropropane wet strength agent in the good slurry exit of desander one section, its concentration is 15%, ton paper consumption is 45kg, before pressurized screen purifies, (pressurized screen import department) adds the above-mentioned filler prepared, the ton paper consumption of filler is 100kg, then purify then through pressurized screen, afterwards the slurry after purification is transported to head box, carry out paper pulp to manufacture paper with pulp, control online concentration is 0.95% simultaneously, finally carry out upper net forming, squeezing, after dehydrate, prepare page.
3, rewinding, packaging:
Rewinding speed per hour controls at 200m/min, and fixing quantity is at 125g/m2, and moisture Control is 4.3%, and rewinding end face is neat, and paper is smooth, and finally packaging prepares finished product.
The white Corii Bovis seu Bubali of dipping through prepared by the preparation method described in above-described embodiment 3 carries out leading indicator detection, and result is as shown in table 3:
Table 3:
The product the key technical indexes prepared from embodiment 3 can be seen that, hygroscopicity value relatively standard is high by 28%, and bursting strength relatively standard is high by 31%, and paper strength is good, and evenness is good, quantitative difference of banner 1g/m2, banner is more smooth, and even dyeing is consistent.
Embodiment 4:
(1) filler is prepared standby:
Add water 5700kg to filler dissolving tank, start stirring, in dissolving tank, first slowly put into light calcium carbonate powder 1325kg, dicalcium powder 1325kg is slowly put into again in dissolving tank, guaranteeing mixing time more than 30 minutes so that it is stir, the filler that final preparation concentration is 340g/L is standby.
(2) a kind of preparation technology impregnating white kraft paper comprises the following steps:
1, slurrying:
(1) preparation of long stuff: by the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to long fibre and kowtow after-bay, and control pulp beating power to be 160kwh, beating consistency be 4.0%, 24 ° of SR of beating degree, prepare long stuff；
(2) preparation of short stock: be 0.9mm bleached sulphate broad-leaved chopped fiber wood pulp by fibre length, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to chopped fiber and kowtow after-bay, and control pulp beating power to be 140kwh, beating consistency be 4.1%, 23 ° of SR of beating degree, prepare short stock.
2, mixing, papermaking:
Start Automatic batching equipment, pressing suction long stuff and short stock respectively to mixing pit, wherein long stuff is 1:1 with the suction amount ratio of short stock, and namely long stuff accounts for the 50% of mixing total amount, short stock accounts for the 50% of mixing total amount, and fully mixed stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, mix homogeneously, proceed to header box successively, fan pump, desander desanding, slurry after desanding is continuously added to polyamides epoxy polyamine chloropropane wet strength agent in the good slurry exit of desander one section, its concentration is 16%, ton paper consumption is 46kg, before pressurized screen purifies, (pressurized screen import department) adds the above-mentioned filler prepared, the ton paper consumption of filler is 100kg, then purify then through pressurized screen, afterwards the slurry after purification is transported to head box, carry out paper pulp to manufacture paper with pulp, control online concentration is 1.05% simultaneously, finally carry out upper net forming, squeezing, after dehydrate, prepare page.
3, rewinding, packaging:
Rewinding speed per hour controls at 200m/min, and fixing quantity is at 150g/m2, and moisture Control is 4.3%, and rewinding end face is neat, and paper is smooth, and finally packaging prepares finished product.
The white Corii Bovis seu Bubali of dipping through prepared by the preparation method described in above-described embodiment 4 carries out leading indicator detection, and result is as shown in table 4:
Table 4:
The product the key technical indexes prepared from embodiment 4 can be seen that, longitudinal wet intensity relatively standard is high by 19%, and in dyeing course, intensity is good, not easily breaks end.Even dyeing is consistent.
Embodiment 5:
(1) filler is prepared standby:
Add water 5300kg to filler dissolving tank, start stirring, in dissolving tank, first slowly put into light calcium carbonate powder 1325kg, dicalcium powder 1325kg is slowly put into again in dissolving tank, guaranteeing mixing time more than 30 minutes so that it is stir, the filler that final preparation concentration is 350g/L is standby.
(2) a kind of preparation technology impregnating white kraft paper comprises the following steps:
1, slurrying:
(1) preparation of long stuff: by the bleached sulphate needle long fibre wood pulp that fibre length is 2.5mm, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to long fibre and kowtow after-bay, and control pulp beating power to be 180kwh, beating consistency be 4.2%, 25 ° of SR of beating degree, prepare long stuff；
(2) preparation of short stock: be 0.85mm bleached sulphate broad-leaved chopped fiber wood pulp by fibre length, pulverize to proceed to by hydrabrusher and kowtow forebay, beater is ground through double plate, proceed to chopped fiber and kowtow after-bay, and control pulp beating power to be 145kwh, beating consistency be 4.1%, 22 ° of SR of beating degree, prepare short stock.
2, mixing, papermaking:
Start Automatic batching equipment, pressing suction long stuff and short stock respectively to mixing pit, wherein long stuff is 1:1 with the suction amount ratio of short stock, and namely long stuff accounts for the 50% of mixing total amount, short stock accounts for the 50% of mixing total amount, and fully mixed stirs.
Mixed slurry is evacuated to by stock pump and destroies forebay, mix homogeneously, proceed to header box successively, fan pump, desander desanding, slurry after desanding is continuously added to polyamides epoxy polyamine chloropropane wet strength agent in the good slurry exit of desander one section, its concentration is 17%, ton paper consumption is 46kg, before pressurized screen purifies, (pressurized screen import department) adds the above-mentioned filler prepared, the ton paper consumption of filler is 100kg, then purify then through pressurized screen, afterwards the slurry after purification is transported to head box, carry out paper pulp to manufacture paper with pulp, control online concentration is 1.1% simultaneously, finally carry out upper net forming, squeezing, after dehydrate, prepare page.
3, rewinding, packaging:
Rewinding speed per hour controls at 200m/min, and fixing quantity is at 194g/m2, and moisture Control is 4.4%, and rewinding end face is neat, and paper is smooth, and finally packaging prepares finished product.
The white Corii Bovis seu Bubali of dipping through prepared by the preparation method described in above-described embodiment 5 carries out leading indicator detection, and result is as shown in table 5:
Table 5:
The product the key technical indexes prepared from embodiment 5 can be seen that, longitudinal wet strong pulling force relatively standard is high by 19.5%, and laterally dry strong pulling force relatively standard is high by 31%, and level dyeing is good.
By considering on the material loss in the testing result impregnating white kraft paper prepared by embodiment 1 ~ 5 and production preparation process, manufacturing process and production cost, white kraft paper of dipping prepared by embodiment 3 and preparation method thereof is the technical scheme of a kind of optimum.
In the above-described embodiments, the preferred forms of the present invention is described, it is obvious that under the inventive concept of the present invention, still can make a lot of change.At this, it should illustrate, any change made under the inventive concept of the present invention falls within protection scope of the present invention.
Claims (7)
1. impregnate a white kraft paper, it is characterized in that: the quantification of 105 ~ 195g/m2 of the white kraft paper of this dipping, quantitative difference of banner≤5g/m2；
The tightness impregnating white kraft paper is 0.6 ~ 0.7g/cm3；
Impregnate folding strength >=30 time of white kraft paper, deformation rate≤2.5%；
The preparation technology of the white kraft paper of described dipping, prepares the white kraft paper of this dipping including slurrying, mixing, papermaking, rewinding, packs afterwards, adds wet strength agent and filler in described papermaking process；
Described slurrying: the preparation of long stuff controls pulp beating power be 150 ~ 180kwh, making beating electric current control 250 ± 30A, beating consistency be 4.0 ~ 4.3%, 24 ~ 25 ° of SR of beating degree, the preparation of short stock controls pulp beating power be 120 ~ 145kwh, making beating electric current control 250 ± 30A, beating consistency be 4.0 ~ 4.3%, 22 ~ 23 ° of SR of beating degree；
Described filler preparation method is as follows:
Add water to filler dissolving tank, start stirring, first in dissolving tank, slowly put into light calcium carbonate powder, dicalcium powder is slowly put into again in dissolving tank, the weight ratio of the water, dicalcium powder and the light calcium carbonate powder that are added is 4 ~ 5:1:1, guaranteeing mixing time more than 30 minutes so that it is stir, the filler that final preparation concentration is 310 ~ 350g/L is standby；
Described mixing, papermaking include:
The suction amount ratio of long stuff and short stock is 3 ~ 1:2 ~ 1；
The ton paper consumption of wet strength agent is 44 ~ 46kg；
The ton paper consumption of filler is 100kg；
Described rewinding, including:
Rewinding speed per hour controls at 200m/min, and moisture Control is 4.1 ~ 4.4%.
2. the white kraft paper of dipping according to claim 1, is characterized in that: the smoothness impregnating white kraft paper is 6/8S.
3. the white kraft paper of dipping according to claim 1, is characterized in that: impregnate the horizontal tearability >=1600mN of white kraft paper, longitudinal dry tensile strength >=90N/15mm, horizontal dry tensile strength >=50N/15mm, longitudinal wet tensile strength >=20N/15mm, horizontal wet tensile (strength) >=15N/15mm.
4. the white kraft paper of dipping according to claim 1, is characterized in that: impregnate the hygroscopicity value >=160g/m2 of white kraft paper, bursting strength >=180KPa, permeability is pass through moment.
5. the white kraft paper of dipping according to claim 1, is characterized in that: described slurrying includes:
(1) preparation of long stuff: by the bleached sulphate needle long fibre wood pulp that fibre length is 2.5 ~ 2.7mm, pulverizes to proceed to by hydrabrusher and kowtows forebay, grind beater through double plate, proceed to long fibre and kowtow after-bay, prepare long stuff；
(2) preparation of short stock: be 0.75 ~ 0.9mm bleached sulphate broad-leaved chopped fiber wood pulp by fibre length, pulverizes to proceed to by hydrabrusher and kowtows forebay, grind beater through double plate, proceed to chopped fiber and kowtow after-bay, prepare short stock.
6. the white kraft paper of dipping according to claim 1, is characterized in that: described mixing, papermaking include:
(1) starting Automatic batching equipment, respectively by suction long stuff and short stock to mixing pit, long stuff accounts for the 60 ~ 50% of mixing total amount, and short stock accounts for the 40 ~ 50% of mixing total amount, and fully mixed stirs；
(2) mixed slurry is evacuated to by stock pump destroies forebay, mix homogeneously, proceed to header box, fan pump, desander desanding successively, slurry after desanding is continuously added to polyamides epoxy polyamine chloropropane wet strength agent in the good slurry exit of desander one section, its concentration is 14 ~ 17%, the above-mentioned filler prepared is added before pressurized screen purifies, then purify then through pressurized screen, afterwards the slurry after purification is transported to head box, carry out paper pulp to manufacture paper with pulp, control online concentration is 0.7 ~ 1.2% simultaneously, after finally carrying out upper net forming, squeezing, dehydrate, prepares page.
7. the white kraft paper of dipping according to claim 1, is characterized in that: described rewinding, including:
Fixing quantity is at 105 ~ 194g/m2, and rewinding end face is neat, and paper is smooth, and finally packaging prepares finished product.
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|---|---|---|---|---|
| CN104499348A (en) * | 2014-11-25 | 2015-04-08 | 南通新世纪机电有限公司 | Breaking-resistant kraft paper making method |
| CN110373945B (en) * | 2019-07-22 | 2021-10-15 | 汇胜集团平原纸业有限公司 | ML kraft paperboard and preparation process thereof |
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