CN109183490A - A kind of high-barrier coated white cardboard and preparation method thereof - Google Patents
A kind of high-barrier coated white cardboard and preparation method thereof Download PDFInfo
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- CN109183490A CN109183490A CN201811087439.7A CN201811087439A CN109183490A CN 109183490 A CN109183490 A CN 109183490A CN 201811087439 A CN201811087439 A CN 201811087439A CN 109183490 A CN109183490 A CN 109183490A
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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
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/38—Coatings with pigments characterised by the pigments
- D21H19/40—Coatings with pigments characterised by the pigments siliceous, e.g. clays
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/46—Non-macromolecular organic compounds
- D21H19/48—Diolefins, e.g. butadiene; Aromatic vinyl monomers, e.g. styrene; Polymerisable unsaturated acids or derivatives thereof, e.g. acrylic acid
-
- 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
- D21H19/36—Coatings with pigments
- D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
- D21H19/56—Macromolecular organic compounds or oligomers thereof obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H19/58—Polymers or oligomers of diolefins, aromatic vinyl monomers or unsaturated acids or derivatives thereof
Abstract
The invention discloses a kind of high-barrier coated white cardboards, it includes paper jam base and high-barrier coating, the high-barrier coating is coated on the front and/or the back side of paper jam base, the high-barrier coating is made of high-barrier agent, and the high-barrier agent is grouped as by the group of following mass parts: 8-30 parts of styrene, 1-5 parts of butadiene, 8-32 parts of butyl polyacrylate, 7-15 parts of polyolefin, 1-8 parts of Isooctyl acrylate monomer and 5-28 parts of china clay.The high-barrier coated white cardboard by slurrying, online, squeezing water removal, preliminarily dried, be coated in machine online, drying and other steps obtain again.High-barrier coated white cardboard of the present invention is good to water vapour, fragrant atmosphere, oxygen-barrier performance, and can recycle use, very environmentally friendly.In addition, the high-barrier coated white cardboard manufacturing process is simple, cost can significantly reduce, improve 10 times compared to tradition PE lamination paper technology production efficiency, and save the traffic expense of 25-40%, the inventory dues of 15-25%.
Description
Technical field
The invention belongs to high-barrier coating paper fields, and in particular to a kind of high-barrier coated white cardboard and preparation method thereof.
Background technique
The barrier property of paper wrapper refers to that paper wrapper has a function of shielding for vapor, fragrance, oxygen etc., however paper
Main structure fiber barrier property itself is poor, is not able to satisfy the barrier property requirement of paper wrapper.
The mode of PE (polyethylene) lamination is mostly used to produce art post paperboard to be used as with barriers function greatly in the prior art
Packaging material.But PE lamination is carried out in the way of the outer lamination of machine, technique is relative complex in production process, production efficiency
Low, manufacturing cost is high, and PE leaching membrane paper is difficult to degrade in nature, and the cost of factory's recovery processing is again high.With the world
The successive appearance of environmental protection policy, the environmentally protective key index for becoming packaging material, various countries have released related for this problem
Environmentally friendly tax revenue takes system, therefore, it is necessary to from product environmental protection and improve production technology, improves production efficiency, reduces production cost
Angle develop a kind of high-barrier coated white cardboard environmentally protective and that PE leaching membrane paper can be substituted.
Summary of the invention
In view of the deficiencies of the prior art, the object of the present invention is to provide a kind of high-barrier coated white cardboard and its preparation sides
Method, the method forms one layer of barrier coat in paper surface mainly by way of single or multiple coatings, to make paper
Opening surface has barrier property.Emphasis of the present invention improves the production technology of high-barrier coated white cardboard production, using in a kind of machine
The high-barrier agent of water-based nature is coated on paper jam base when producing paper jam base by the mode being coated with online, can not only
Shorten process flow, save production cost, and the high-barrier coated white cardboard produced can natural degradation, recycle
It is very convenient, it is very beneficial to environmental protection.Coating is used for paper machine or whole production line online in machine, can be with slurrying, paper machine, coating
Etc. fit applications.
In order to realize purpose of the present invention, it is achieved through the following technical solutions.
A kind of high-barrier coated white cardboard comprising paper jam base and high-barrier coating, the high-barrier coating are coated on
The front and/or the back side of paper jam base, the high-barrier coating are made of high-barrier agent, and the ingredient of the high-barrier agent includes benzene
Ethylene, butadiene, butyl polyacrylate, polyolefin, Isooctyl acrylate monomer and china clay.
The high-barrier agent is grouped as by the group of following mass parts: 8-30 parts of styrene, 1-5 parts of butadiene, polyacrylic acid
8-32 parts of butyl ester, polyolefin (for example, polyolefin may include at least one of polypropylene, polybutene) 7-15 parts, acrylic acid
Different monooctyl ester 1-8 parts and china clay 5-28 parts.
It is further preferred that the high-barrier agent is grouped as by the group of following mass parts: 10-25 parts of styrene, butadiene
1-3 parts, 10-25 parts of butyl polyacrylate, 7-15 parts of polyolefin, 1-5 parts of Isooctyl acrylate monomer and 8-25 parts of china clay.
The preparation process of the high-barrier agent are as follows: styrene 10-25 parts and butadiene 1-3 parts are added in a kettle,
Temperature is 40-75 DEG C (preferably 50-70 DEG C), pressure is that reaction 20-65min is (preferably under conditions of 15-25MPa (preferably 20MPa)
30-60min), it adds 10-25 parts of butyl polyacrylate, reacts and add 7-15 parts of polyolefin after 10-20min, it is mutually synthermal
(mass concentration of china clay is 8-10%), increases temperature to 150- with china clay 8-25 parts is added after reaction 30-40min under pressure
250 DEG C, pressure is reduced to 8-12MPa (preferably 10MPa), reacts 4-6h with this condition, and to it, cooling will completely after fully reacting
Product takes out, and the high-barrier agent can be obtained, and the viscosity of the high-barrier agent is 1000-3000cps.
Optionally, paper jam base is cupstock.
A kind of preparation method of high-barrier coated white cardboard, comprising the following steps:
(1) slurrying: paper jam base is divided into facial tissue layer, core paper layer and ground paper layer, will prepare facial tissue layer slurry, core paper layer slurry's material
And ground paper layer slurry pulpboard (pulpboard is one kind of paper pulp, is a kind of millboard that paper pulp is formed after dewatering press, gram
Weight makes pulpboard generally at 250 grams or more, in paper industry and is primarily to facilitate transport) after D type hydrabrusher size degradation, it is broken
The mass concentration of slurry is that 3.5-6.5% is screened, and is beaten, with slurry, and facial tissue layer slurry, core paper layer slurry's material and bottom are made respectively
Paper layer slurry；
(2) it surfs the Internet: after facial tissue layer slurry made from step (1), core paper layer slurry's material and ground paper layer slurry difference drainage, into
Row is compound, and the speed of the online of facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry is 300-500m/min in recombination process,
Composite mortar is obtained, the integral thickness after three kinds of slurries are compound is 150-400 μm, preferably 170-350 μm；
(3) squeezing water removal: composite mortar prepared by step (2) first (is mentioned with blind press by Fu Yite Co., Ltd
It is squeezed for 920 × 4960mm of specification ф), pressure is 120-140kN/m (preferably 130kN/m), then uses shoe press roll
(being provided by Fu Yite Co., Ltd, 1044 × 4700mm of specification ф) squeezes paper, and pressure is that 680-720kN/m is (excellent
Select 700kN/m)；
(4) preliminarily dried: the composite mortar after step (3) squeezing water removal is dried, using multiple groups (such as 2-10 group)
Drying cylinder is dried, and dry temperature rises (detailed process are as follows: 25-50 DEG C of holding 30min, 50-80 DEG C of holding 25- in gradient
30min, 80-130 DEG C (preferably 80-120 DEG C) holding 15-20min), drying cylinder cylinder face temperature successively rises to 120 DEG C from 50 DEG C,
Into slurry, moisture content is 5-12% (preferably 6.5-10%), obtains paper jam base；
(5) in machine online be coated with: in order to improve surface strength of paper, by step (4) preparation paper jam base two sides in extremely
Rare coated on one side high-barrier agent；
(6) dry again: by step (5) coating high-barrier agent paper jam base be dried, using paper machine hot bellows (by
Fu Yite Co., Ltd provides) it is dried, drying temperature is 140-155 DEG C (preferably 150 DEG C), the paper locomotive of paper machine hot bellows
Speed is 350-550m/min (preferably 400-500m/min), obtains high-barrier coated white cardboard.
In the step (1), facial tissue layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
60-100 parts (preferably 70-90 parts) and 8-35 parts of bleached softwood wood kraft pulp (preferably 10-30 parts).
In the step (1), core paper layer slurry expects to be carried out by the component of following mass parts with slurry: chemical thermomechanical pulp 35-
50 parts (preferably 40-45 parts), bleaching broad-leaved wood sulphate pulp 2-12 parts of (preferably 5-10 parts), bleached softwood wood kraft pulp 8-18
Part (preferably 10-15 parts) and 30-45 parts of broken (preferably 35-40 parts).
In the step (1), ground paper layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
70-100 parts (preferably 80-90 parts) and 5-20 parts of bleached softwood wood kraft pulp (preferably 10-20 parts).
Bleaching broad-leaved wood sulphate pulp, bleached softwood wood kraft pulp, chemical thermomechanical pulp solid content is 3.0-
4.5%, pH value is 4.5-6.0.
The main purpose screened in step (1) is screened to the impurity in slurry, is by 2-5mm (preferably 4mm)
Pressure hole sizer removes the impurity in slurry.
In step (5) described machine online coating process be carried out in normal art post paperboard process flow it is improved, mainly
That coating coating process is changed, detailed process are as follows: high-barrier agent be overleaf apply and/or front apply (ground paper layer for back
Face, facial tissue layer are front), wherein the back side, which applies, uses gauge stick, diameter 12mm, and painting amount is 3-15g/m2, front applies use
It is ceramic wear-resisting scraper, coating weight 3-10g/m2；Normal paper will do it drying after coating, but be all infra-red drying or
Heated-air drying, the two is not united it is dry, and in the present invention back side apply and/or front be painted with after use infra-red drying
It is dried with the united mode of heated-air drying, effect is to allow high-barrier agent rapid draing, so that paper can be significantly improved by playing
The physical property opened, while the influence for solving the viscous rod of barrier or disconnected paper is (square in combination with infra-red drying and heated-air drying herein
The influence that can also solve viscous rod or disconnected paper is dried in formula, but does not prevent high-barrier agent from penetrating into inside paper to fiber end face
Carry out the gap between cladding and fiberfill fibers), and machine is not necessarily to using being coated with online for tradition PE lamination paper jam relatively in machine
Outer lamination shortens preparation process, saves preparation cost.Traditional PE lamination production technology locomotive speed is 100-200m/min, breadth
For 0.78-1.3m, and the speed being coated with online in machine of the present invention is 350-550m/min, breadth 4.5m, in contrast this hair
The production efficiency of the bright technical solution is 10 times of the outer PE lamination of machine.
Preferably, in the step (5), before being coated with high-barrier agent also in two faces of paper jam base at least one
A face coating starch solution carries out top sizing (being coated starch solution in paper jam substrate surface), and starch coating weight is
1.5-3.5g/m2(starch coating weight is oven-dry weight).The preparation process of the starch solution are as follows: be first by mass concentration by starch
The concentration of 18-22% (preferably 20%) is dissolved in the water, and by boiling vessel boiling, the temperature of boiling is 90-100 DEG C (preferably 95
DEG C), digestion time 20-30min (preferably 25min), the starch solution after boiling is diluted with water to 5-15%, spare.
Coating high-barrier agent is divided into one side coating or double spread, the positive coating weight of one side coating in the step (5)
For 0g/m2, backsize amount is 3-15g/m2(preferably 4-12g/m2)；The positive coating weight of double spread is 1-10g/m2(preferably
3-9g/m2), backsize amount is 3-15g/m2(preferably 4-12g/m2)。
Step (6) is dried using paper machine hot bellows, and drying temperature is 140-155 DEG C (preferably 150 DEG C), paper machine speed
For 350-550m/min (preferably 400-500m/min).
In addition, general recto (i.e. facial tissue layer) coating is three times, the back side (i.e. ground paper layer) coating is primary, and back is at the back side
It applies, the first time that front applies is named primary coat, and core is made to apply for the second time, and face is made to apply for the third time.
Paper jam is aluminized or PE lamination paper jam compares with traditional, and technical solution of the present invention has the beneficial effect that:
(1) high-barrier agent environmental protection of the present invention, and aluminum material can be saved；
(2) the high-barrier agent compactness is fine, completely cuts off to water vapour, fragrant atmosphere, oxygen；
(3) simple production process of the present invention significantly reduces production cost, substitutes the use of PE lamination paper jam, preparation
The decomposable recycling of high-barrier coated white cardboard, cost recovery significantly reduces, and realizes technological break-through, has filled up domestic and international machine
The technology vacancy of interior high-barrier coated white cardboard.
(4) tradition PE lamination paper jam is compared, the high-barrier coated white cardboard of technical solution manufacture of the present invention can be saved
The traffic expense of 25-40%, the inventory dues of 15-25%.
(5) PE lamination production technology locomotive speed is 100-200m/min, breadth 0.78-1.3m, and machine of the present invention at present
The speed being inside coated with online is 350-550m/min, breadth 4.5m, and the production of technical solution of the present invention is imitated in contrast
Rate is 10 times of the outer PE lamination of machine.
Specific embodiment
In order to allow those skilled in the art's more clearly technical solution of the present invention, it is exemplified below some embodiments.
Embodiment 1
The high-barrier agent is grouped as by the group of following mass parts: 8 parts of styrene, 1 part of butadiene, butyl polyacrylate 8
Part, 7 parts of polyolefin, 1 part of Isooctyl acrylate monomer and 5 parts of china clay.
The preparation process of the high-barrier agent are as follows: 10 parts and 1 part of butadiene of styrene are added in a kettle, is in temperature
40 DEG C, pressure react 20min under conditions of being 15MPa, add 10 parts of butyl polyacrylate, react add after 10min it is poly-
7 parts of alkene, 8 parts of china clay (concentration 9%) is added after 30min is reacted under identical temperature and pressure, increases temperature to 150 DEG C, pressure
Power is reduced to 8MPa, reacts 4h with this condition, takes out product to its complete cooling after fully reacting, the high-barrier can be obtained
Agent.
A kind of preparation method of high-barrier coated white cardboard, comprising the following steps:
(1) slurrying: paper jam base is divided into facial tissue layer, core paper layer and ground paper layer, will prepare facial tissue layer slurry, core paper layer slurry's material
And ground paper layer slurry pulpboard (pulpboard is one kind of paper pulp, is a kind of millboard that paper pulp is formed after dewatering press, gram
Weight makes pulpboard generally at 250 grams or more, in paper industry and is primarily to facilitate transport) after D type hydrabrusher size degradation, it is broken
The mass concentration of slurry is that 3.5-6.5% is screened, and is beaten, with slurry, and facial tissue layer slurry, core paper layer slurry's material and bottom are made respectively
Paper layer slurry；
(2) it surfs the Internet: after facial tissue layer slurry made from step (1), core paper layer slurry's material and ground paper layer slurry difference drainage, into
Row is compound, and the speed of the online of facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry is 300m/min in recombination process, obtains
Composite mortar, the integral thickness after three kinds of slurries are compound are 150 μm；
(3) squeezing water removal: composite mortar prepared by step (2) is first squeezed with blind press, pressure is
120kN/m, then paper is squeezed with shoe press roll, pressure 680kN/m；
(4) preliminarily dried: the composite mortar after step (3) squeezing water removal is dried, using multiple groups (such as 2 groups) drying cylinder
It is dried, dry temperature rises (25 DEG C of holdings 30min, 50 DEG C of holdings 30min, 130 DEG C of holding 20min) in gradient, dries
Cylinder cylinder face temperature successively rises to 120 DEG C from 50 DEG C, until moisture content is 5% in slurry, obtains paper jam base；
(5) it is coated in machine: in order to improve surface strength of paper, will have in the paper jam base two sides of step (4) preparation online
Coated on one side high-barrier agent；
(6) dry again: by step (5) coating high-barrier agent paper jam base be dried, using paper machine hot bellows into
Row drying, drying temperature are 140 DEG C, and paper machine speed 350m/min obtains high-barrier coated white cardboard.
Online coating process detailed process in step (5) described machine are as follows: high-barrier agent is that (i.e. ground paper layer is back for overleaf painting
Face), wherein back, which applies, uses gauge stick, diameter 12mm, painting amount is 3g/m2, then it is square in combination with infra-red drying and heated-air drying
Formula is dried.
In the step (5), starch is 1.5g/m in paper jam base backsize amount2, in the step (5), it is being coated with
Also top sizing is carried out in the backsize starch solution of paper jam base before high-barrier agent (to be applied in paper jam substrate surface
Cloth starch solution), starch coating weight is 1.5g/m2(starch coating weight is oven-dry weight, that is, adiabatic drying amount) states the system of starch solution
Standby process are as follows: first starch is dissolved in the water by the concentration that mass concentration is 18%, by boiling vessel boiling, the temperature of boiling is
90 DEG C, digestion time 20min, the starch solution after boiling is diluted with water to 5%, spare.
In the step (1), facial tissue layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
60 parts and 8 parts of bleached softwood wood kraft pulp.
In the step (1), core paper layer slurry expects to be carried out by the component of following mass parts with slurry: chemical thermomechanical pulp 35
Part, 2 parts of broad-leaved wood sulphate pulp of bleaching, 8 parts of bleached softwood wood kraft pulp and 30 parts of broken.
In the step (1), ground paper layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
70 parts and 5 parts of bleached softwood wood kraft pulp.
Embodiment 2
The high-barrier agent is grouped as by the group of following mass parts: 10 parts of styrene, 2 parts of butadiene, butyl polyacrylate
20 parts, 10 parts of polyolefin, 2 parts of Isooctyl acrylate monomer and 8 parts of china clay.
The preparation process of the high-barrier agent are as follows: 10 parts and 2 parts of butadiene of styrene are added in a kettle, is in temperature
50 DEG C, pressure react 30min under conditions of being 20MPa, add 10-25 part of butyl polyacrylate, add again after reacting 115min
Enter 10 parts of polyolefin, 8 parts of china clay (concentration 8%) is added after 35min is reacted under identical temperature and pressure, increases temperature to 180
DEG C, pressure is reduced to 10MPa, reacts 4-6h with this condition, takes out product to its complete cooling after fully reacting, institute can be obtained
State high-barrier agent.
A kind of preparation method of high-barrier coated white cardboard, comprising the following steps:
(1) slurrying: paper jam base is divided into facial tissue layer, core paper layer and ground paper layer, will prepare facial tissue layer slurry, core paper layer slurry's material
And the pulpboard of ground paper layer slurry, after D type hydrabrusher size degradation, the mass concentration of pulping is that 3.5-6.5% is sieved
Choosing, mashing is with slurry, and facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry are made respectively；
(2) it surfs the Internet: after facial tissue layer slurry made from step (1), core paper layer slurry's material and ground paper layer slurry difference drainage, into
Row is compound, and the speed of the online of facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry is 400m/min in recombination process, obtains
Composite mortar, the integral thickness after three kinds of slurries are compound are 200 μm；
(3) squeezing water removal: composite mortar prepared by step (2) is first squeezed with blind press, pressure is
130kN/m, then paper is squeezed with shoe press roll, pressure 700kN/m；
(4) preliminarily dried: the composite mortar after step (3) squeezing water removal is dried, using multiple groups (such as 2-10 group)
Drying cylinder is dried, and dry temperature rises (40 DEG C of holdings 30min, 70 DEG C of holdings 25-30min, 130 DEG C of holding 15- in gradient
20min), drying cylinder cylinder face temperature successively rises to 120 DEG C from 50 DEG C, until moisture content is 6.5% in slurry, obtains paper jam base
Layer；
(5) it is coated in machine: in order to improve surface strength of paper, the paper jam base two sides of step (4) preparation being coated with online
High-barrier agent；
(6) dry again: by step (5) coating high-barrier agent paper jam base be dried, using paper machine hot bellows into
Row drying, drying temperature are 150 DEG C, and paper machine speed 400m/min obtains high-barrier coated white cardboard.
In step (5) described machine online coating process be carried out in normal art post paperboard process flow it is improved, mainly
That coating coating process is changed, detailed process are as follows: high-barrier agent be overleaf apply and front apply (ground paper layer is the back side,
Facial tissue layer is front), wherein the back side uses gauge stick, diameter 12mm, and painting amount is 4g/m2, front is using ceramic wear-resisting
Scraper, coating weight 4g/m2；Back side painting and front are dried after being painted with infra-red drying and the united mode of heated-air drying.
In the step (5), starch is all 2.0g/m in paper jam base front and back coating weight2, the step (5)
In, coating starch solution carries out top sizing also in two faces of paper jam base before being coated with high-barrier agent.The starch
The preparation process of solution are as follows: starch is dissolved in the water by the concentration that mass concentration is 20% first, passes through boiling vessel boiling, boiling
Temperature be 95 DEG C, digestion time 30min, the starch solution after boiling is diluted with water to 10%, spare.
In the step (1), facial tissue layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
70 parts and 10 parts of bleached softwood wood kraft pulp.
In the step (1), core paper layer slurry expects to be carried out by the component of following mass parts with slurry: chemical thermomechanical pulp 40
Part, 5 parts of broad-leaved wood sulphate pulp of bleaching, 10 parts of bleached softwood wood kraft pulp and 35 parts of broken.
In the step (1), ground paper layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
80 parts and 10 parts of bleached softwood wood kraft pulp.
Embodiment 3
The high-barrier agent is grouped as by the group of following mass parts: 25 parts of styrene, 4 parts of butadiene, butyl polyacrylate
25 parts, 12 parts of polyolefin, 5 parts of Isooctyl acrylate monomer and 15 parts of china clay.
The preparation process of the high-barrier agent are as follows: 25 parts and 45 parts of butadiene of styrene are added in a kettle, in temperature
50min is reacted under conditions of being 20MPa for 65 DEG C, pressure, adds 25 parts of butyl polyacrylate, is added after reacting 18min
12 parts of polyolefin, 15 parts of china clay (concentration 6%) is added after 35min is reacted under identical temperature and pressure, increases temperature to 200
DEG C, pressure is reduced to 10MPa, reacts 5h with this condition, takes out product to its complete cooling after fully reacting, can be obtained described
High-barrier
A kind of preparation method of high-barrier coated white cardboard, comprising the following steps:
(1) slurrying: paper jam base is divided into facial tissue layer, core paper layer and ground paper layer, will prepare facial tissue layer slurry, core paper layer slurry's material
And the pulpboard of ground paper layer slurry, after D type hydrabrusher size degradation, the mass concentration of pulping is that 3.5-6.5% is sieved
Choosing, mashing is with slurry, and facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry are made respectively；
(2) it surfs the Internet: after facial tissue layer slurry made from step (1), core paper layer slurry's material and ground paper layer slurry difference drainage, into
Row is compound, and the speed of the online of facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry is 350m/min in recombination process, obtains
Composite mortar, the integral thickness after three kinds of slurries are compound are 350 μm；
(3) squeezing water removal: composite mortar prepared by step (2) is first squeezed with blind press, pressure is
125kN/m, then paper is squeezed with shoe press roll, pressure 700kN/m；
(4) preliminarily dried: the composite mortar after step (3) squeezing water removal is dried, using multiple groups (such as 8 groups) drying cylinder
It is dried, dry temperature rises (45 DEG C of holdings 30min, 70 DEG C of holdings 30min, 130 DEG C of holding 20min) in gradient, dries
Cylinder cylinder face temperature successively rises to 120 DEG C from 50 DEG C, until moisture content is 8% in slurry, obtains paper jam base；
(5) it is coated in machine: in order to improve surface strength of paper, the paper jam base two sides of step (4) preparation being coated with online
High-barrier agent；
(6) dry again: by step (5) coating high-barrier agent paper jam base be dried, using paper machine hot bellows into
Row drying, drying temperature are 150 DEG C, and paper machine speed 400m/min obtains high-barrier coated white cardboard.
Online coating process detailed process in step (5) described machine are as follows: high-barrier agent is overleaf to apply to apply (base stock with front
Layer is the back side, and facial tissue layer is front), wherein the back side, which applies, uses gauge stick, diameter 12mm, and painting amount is 12g/m2, front applies and adopts
It is ceramic wear-resisting scraper, coating weight 9g/m2；Back side painting and front are united with infra-red drying and heated-air drying after being painted with
Mode is dried.
In the step (5), starch is 1.5g/m in paper jam base backsize amount2, positive coating weight is 2.0g/m2.Institute
It states in step (5), also carries out top sizing (i.e. in two face coating starch solution of paper jam base before being coated with high-barrier agent
Starch solution is coated in paper jam substrate surface).The preparation process of the starch solution are as follows: be first by mass concentration by starch
20% concentration is dissolved in the water, and by boiling vessel boiling, the temperature of boiling is 90 DEG C, digestion time 20min, the shallow lake after boiling
Powder solution is diluted with water to 10%, spare.
In the step (1), facial tissue layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
90 parts and 30 parts of bleached softwood wood kraft pulp.
In the step (1), core paper layer slurry expects to be carried out by the component of following mass parts with slurry: chemical thermomechanical pulp 45
Part, 10 parts of broad-leaved wood sulphate pulp of bleaching, 15 parts of bleached softwood wood kraft pulp and 40 parts of broken.
In the step (1), ground paper layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
90 parts and 20 parts of bleached softwood wood kraft pulp.
Embodiment 4
The high-barrier agent is grouped as by the group of following mass parts: 30 parts of styrene, 5 parts of butadiene, butyl polyacrylate
32 parts, 15 parts of polyolefin, 8 parts of Isooctyl acrylate monomer and 28 parts of china clay.
The preparation process of the high-barrier agent are as follows: 30 parts and 5 parts of butadiene of styrene are added in a kettle, is in temperature
75 DEG C, pressure react 65min under conditions of being 25MPa, add 32 parts of butyl polyacrylate, react add after 20min it is poly-
15 parts of alkene, 28 parts of china clay (concentration 10%) is added after 30-40min is reacted under identical temperature and pressure, increases temperature to 250
DEG C, pressure is reduced to 12MPa, reacts 6h with this condition, takes out product to its complete cooling after fully reacting, can be obtained described
High-barrier agent.
A kind of preparation method of high-barrier coated white cardboard, comprising the following steps:
(1) slurrying: paper jam base is divided into facial tissue layer, core paper layer and ground paper layer, will prepare facial tissue layer slurry, core paper layer slurry's material
And the pulpboard of ground paper layer slurry, after D type hydrabrusher size degradation, the mass concentration of pulping is screened for 6.5%, is beaten
Slurry, it is with slurry, facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry are made respectively；
(2) it surfs the Internet: after facial tissue layer slurry made from step (1), core paper layer slurry's material and ground paper layer slurry difference drainage, into
Row is compound, and the speed of the online of facial tissue layer slurry, core paper layer slurry's material and ground paper layer slurry is 500m/min in recombination process, obtains
Composite mortar, the integral thickness after three kinds of slurries are compound are 400 μm；
(3) squeezing water removal: composite mortar prepared by step (2) is first squeezed with blind press, pressure is
140kN/m, then paper is squeezed with shoe press roll, pressure 720kN/m；
(4) preliminarily dried: the composite mortar after step (3) squeezing water removal is dried, using multiple groups (such as 5 groups) drying cylinder
It is dried, dry temperature rises (40 DEG C of holdings 30min, 70 DEG C of holdings 30min, 125 DEG C of holding 20min) in gradient, dries
Cylinder cylinder face temperature successively rises to 120 DEG C from 50 DEG C, until moisture content is 9% in slurry, obtains paper jam base；
(5) it is coated with online in machine: in order to improve surface strength of paper, by the paper jam base backsize of step (4) preparation
High-barrier agent；
(6) dry again: by step (5) coating high-barrier agent paper jam base be dried, using paper machine hot bellows into
Row drying, drying temperature are 155 DEG C, and paper machine speed 550m/min obtains high-barrier coated white cardboard.
In step (5) described machine online coating process be carried out in normal art post paperboard process flow it is improved, mainly
It is that coating coating process is changed, detailed process are as follows: high-barrier agent is overleaf painting (ground paper layer is the back side), wherein the back side
It applies and uses gauge stick, diameter 12mm, painting amount is 15g/m2, then done with infra-red drying and the united mode of heated-air drying
It is dry.
In the step (5), it is 3.5g/m that starch, which is coated in paper jam base backsize amount,2.In the step (5), applying
Also top sizing is carried out in paper jam base backsize starch solution before the agent of cloth high-barrier (to be applied in paper jam substrate surface
Cloth starch solution), starch coating weight is 3.5g/m2(starch coating weight is oven-dry weight).The preparation process of the starch solution are as follows:
First starch is dissolved in the water by the concentration that mass concentration is 20%, by boiling vessel boiling, the temperature of boiling is 95 DEG C, boiling
Time 25min, the starch solution after boiling are diluted with water to 8%, spare.
In the step (1), facial tissue layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
100 parts and 35 parts of bleached softwood wood kraft pulp.
In the step (1), core paper layer slurry expects to be carried out by the component of following mass parts with slurry: chemical thermomechanical pulp 50
Part, 12 parts of broad-leaved wood sulphate pulp of bleaching, 18 parts of bleached softwood wood kraft pulp and 45 parts of broken.
In the step (1), ground paper layer slurry is carried out with slurry by the component of following mass parts: bleaching broad-leaved wood sulphate pulp
100 parts and 20 parts of bleached softwood wood kraft pulp.
Embodiment 5
It is 230g/m with body paper2Based on, according to technical solution of the present invention, it is prepared for high-barrier agent backsize amount
For 12g/m2Product, number is A group；Also being prepared for high-barrier agent backsize amount is 12g/m2, positive coating weight is 9g/m2
Product number be B group product；Also it is prepared for back side PE lamination paper jam, back side lamination amount is 24g/m2, number is C group；It is double
Face PE lamination paper jam, back side lamination amount are 24g/m2, positive lamination amount is 12g/m2, number is D group.A, B, C, D group are in identical item
There is test index under part: air permeability, measures the ventilative value of recto and the back side respectively, and unit is (mL/min)；E group (as
Contrast groups) preparation process is with A group, but E group is not dried using infra-red drying and the united mode of heated-air drying；Hygroscopicity value,
10min, the hygroscopicity value of 20min are tested, unit is (gsm)；Hot water side is seeped, unit (kg/m2)；Coffee side is seeped, unit (mm), water
Vapor permeation amount, unit (g/m2, day), effect is sealed, hot water leakage (hot water used is 100 DEG C), coffee leakage, grease seeps
Leakage, wherein sealing effect, hot water leakage, coffee leakage, grease leakage is the test at 48 hours, and O indicates that detection is unqualified ,+
Indicate that detection is qualified, ++ indicate that detection effect is fine, the results are shown in Table 1.
Table 1
As can be seen from Table 1, it is suitable in aspect of performance effect for product of the present invention is with respect to PE lamination paper jam
Or it is more preferable.Can also as seen from Table 1, when effect is suitable, high-barrier agent coating weight of the present invention can be obvious
Many is saved, this substantially reduces production cost.In addition, product of the present invention is according to backsize, then product is particularly suitable for
Make cold dixie cup.
In addition, relative to traditional PE lamination papermaking, with quantification of 230g/m2Body paper for, the work of PE lamination papermaking
Skill needs the lamination 20g high-barrier agent on body paper just to can achieve preferable barriering effect, but the present invention only needs the papermaking
Only need to be coated with the agent of 10g high-barrier can reach identical barriering effect in technique.And the paper that two kinds of technique manufactures
Thickness is different, and the paper that the present invention is made can all substantially reduce in terms of inventory and transportation cost, manufactures high resistant of the same area
Every paper, technical solution of the present invention can save the traffic expense of 25-40% compared to tradition PE lamination paper technology, 15-25%'s
Inventory dues.
In addition, high-barrier coated white cardboard of the present invention can natural degradation, it is very environmentally friendly, if recycle, recycle benefit
The recovery cost of the relatively traditional PE leaching membrane paper of expense can reduce 20-40%, and traditional PE leaching membrane paper can not drop naturally
Solution, is unfavorable for environmental protection.
Claims (9)
1. a kind of high-barrier coated white cardboard, which is characterized in that it includes paper jam base and high-barrier coating, and the high-barrier applies
Layer is coated on the front and/or the back side of paper jam base, and the high-barrier coating is made of high-barrier agent, the high-barrier agent by with
The group of lower mass parts is grouped as: 8-30 parts of styrene, 1-5 parts of butadiene, 8-32 parts of butyl polyacrylate, 7-15 parts of polyolefin,
1-8 parts and china clay 5-28 parts of Isooctyl acrylate monomer.
2. high-barrier coated white cardboard according to claim 1, which is characterized in that the preparation process of the high-barrier agent
Are as follows: styrene and butadiene are added in a kettle, reacts 20- under conditions of temperature is 40-75 DEG C, pressure is 15-25MPa
65min adds butyl polyacrylate, reacts 10-20min, adds polyolefin, and china clay is added after reacting 30-40min, rises
For temperature to 150-250 DEG C, pressure is reduced to 8-12MPa, reacts 4-6h, cooling, and the high-barrier agent is made.
3. a kind of preparation method of high-barrier coated white cardboard according to claim 1, which is characterized in that including following step
It is rapid:
(1) slurrying: by pulpboard after pulper size degradation, being screened, mashing, with slurry, and facial tissue layer slurry, core paper are made respectively
Layer slurry and ground paper layer slurry；
(2) it surfs the Internet: after facial tissue layer slurry made from step (1), core paper layer slurry's material and ground paper layer slurry difference drainage, being answered
It closes, obtains the composite mortar of 150-400 μ m-thick；
(3) squeezing water removal: composite mortar prepared by step (2) is first squeezed with blind press, pressure 120-
140kN/m, then paper is squeezed with shoe press roll, pressure 680-720kN/m；
(4) preliminarily dried: the composite mortar after step (3) squeezing water removal is dried, until moisture content is 5- in slurry
12%, obtain paper jam base；
(5) it is coated with online in machine: at least one face in two faces of the paper jam base of step (4) preparation is coated with high-barrier agent,
It is dried after being coated with infra-red drying and the united mode of heated-air drying；
(6) it dries again: the paper jam base of step (5) coating high-barrier agent being dried, high-barrier coated white cardboard is obtained.
4. a kind of preparation method of high-barrier coated white cardboard according to claim 3, which is characterized in that the step
(5) in, at least one face coating starch solution before being coated with high-barrier agent also in two faces of paper jam base, starch is applied
Cloth amount is 1.5-3.5g/m2。
5. a kind of preparation method of high-barrier coated white cardboard according to claim 4, which is characterized in that the starch
The preparation process of solution are as follows: starch is dissolved in the water by the concentration that mass concentration is 18-22%, the temperature of boiling, boiling is
90-100 DEG C, the time of boiling is 20-30min, and the starch solution after boiling is diluted with water to 5-15%, spare.
6. a kind of preparation method of high-barrier coated white cardboard according to claim 3, which is characterized in that step (4)
The temperature of middle drying rises in gradient, detailed process are as follows: 25-50 DEG C of holding 30min, 50-80 DEG C of holding 25-30min, 80-130
DEG C keep 15-20min.
7. a kind of preparation method of high-barrier coated white cardboard according to claim 3, which is characterized in that the step
(5) coating high-barrier agent is divided into one side coating or double spread in, and the positive coating weight of one side coating is 0g/m2, backsize
Amount is 3-15g/m2；The positive coating weight of double spread is 1-10g/m2, backsize amount is 3-15g/m2。
8. a kind of preparation method of high-barrier coated white cardboard according to claim 3, which is characterized in that step (5)
The detailed process being coated with online in the machine are as follows: high-barrier agent is overleaf coating and/or front coating, and wherein backsize is adopted
With gauge stick, coating weight 3-15g/m2, front coating is using ceramic wear-resisting scraper, coating weight 1-10g/m2。
9. a kind of preparation method of high-barrier coated white cardboard according to claim 3, which is characterized in that step (6)
It is dried using paper machine hot bellows, drying temperature is 140-155 DEG C, and the paper machine speed of paper machine hot bellows is 350-550m/
min。
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| CN111691237A (en) * | 2020-06-19 | 2020-09-22 | 湖北骏马纸业有限公司 | Production process of high-barrier coated white cardboard |
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