CN109837799A - A kind of preparation method improving low grammes per square metre T cardboard ring crush intensity - Google Patents
A kind of preparation method improving low grammes per square metre T cardboard ring crush intensity Download PDFInfo
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Abstract
The invention discloses a kind of preparation methods for improving low grammes per square metre T cardboard ring crush intensity, including following four step: (1) raw material selects: using corrugated paper and offset paper for raw material；(2) prepared by slurry: after two kinds of raw materials mix in proportion in step (1), after size degradation, impurity elimination, fiber classification, heat partition, concentration, it is spare that long fiber pulp and short fibered pulp are stored in respective stock tank respectively；(3) slurry configures: by step (2) medium-length fibre and short stock, preparing surface layer slurry and bottom slurry in proportion；(4) T cardboard is manufactured paper with pulp: surface layer slurry in step (3) and bottom slurry are sent after fan pump, pressurized screen respectively to surface layer and bottom head box into slurry general pipeline Top wire former, after wet end vacuum dehydration, into after the processing such as press section, front and back drying portion, top sizing, calender, low grammes per square metre T cardboard is made through reel machine, rewinding machine and packaging.
Description
Technical field
The present invention relates to T cardboard more particularly to a kind of preparation methods for improving low grammes per square metre T cardboard ring crush intensity.
Background technique
T cardboard is a kind of package paper between boxboard and fluting medium, for manufacture at being packed for all kinds of top grades
Carton or carton use, at low cost since papery is light, and have good resiliency, convenient for packed and transported and protect internal goods
Object.
Common fluting medium is to use 100% corrugated case for raw material, although at low cost, fiber quality is poor；In order to save
About cost also seldom uses fiber classification and dirt count technology, only relies on addition sizing agent and wet strength agent in slurry and improves paper
Bond strength, cause the tightness of paper bigger than normal, bulk reduce, be affected to the stiffness of paper, be unfavorable for mentioning for ring crush intensity
Height, while the pollutional load of waste water is high, cost for wastewater treatment increases.
The compression strength of T container of paperboard depends primarily on the ring crush intensity of T cardboard, wherein have 60% compression strength by
T cardboard provides, therefore, the intensity of Yao Tigao T container of paperboard, it is necessary to improve the ring crush intensity of T cardboard first.
General T board product is quantitatively generally higher than 100g/m2, quantitative big, then fiber usage amount is big, and product strength can be got well
A bit, it is not easy to it is damaged, but high production cost improves product competitiveness in the market, exploitation to save fibrous raw material and production cost
Low basis weight, quality T cardboard become development trend.
However, with T cardboard market turning low basis weight (80~100g/m of specified amount range2) and wastepaper as raw material it is multiple
Repetitive cycling is reduced using rear fibre strength, using 100% corrugated paper manufacture paper with pulp T cardboard be difficult meet " low basis weight, high intensity " T
Quality of Board requirement.Manufacturer must improve the ring of T cardboard using new raw material, new chemical auxiliary agent and novel technique
Compressive Strength.
Currently, most factories are all made of following production method: 1, adding good fiber quality raw material such as wood pulp to promote original
The quality of material；2, various new chemical auxiliary agents are added to promote fiber bonding strength.But the above effect is not highly desirable, T paper
Though plate ring crush intensity increases, production cost rises, and contaminated wastewater load increases, and the performance of enterprises reduces, and product lacks city
Field competitiveness.
Summary of the invention
Goal of the invention: the object of the present invention is to provide a kind of preparation methods for improving low grammes per square metre T cardboard ring crush intensity, make to make
While the T container of paperboard intensity obtained meets the packing instructions of product, production cost is reasonable.
Technical solution: the present invention improves the preparation method of low grammes per square metre T cardboard ring crush intensity, comprising the following steps:
Step 1, raw material selects: selecting corrugated paper and offset paper is raw material；
Step 2, prepared by slurry: by corrugated paper and offset paper, passing through waterpower size degradation after mixing in proportion, goes unless fine
After tieing up class impurity and fiber-like impurity, isolate long fibre and staple fiber through fiber classification machine, long fibre through further slagging-off and
After screening removal fine impurities, concentrated machine is concentrated into setting concentration, sicker is removed into heat dispersion machine, at defiberizing machine
The obtained qualified long stuff of reason is stored in spare in stock tank；The concentrated machine of staple fiber is stored in short fibre after being concentrated into setting concentration
It ties up spare in stock tank；
Step 3, slurry preparation: using the long stuff prepared in step 2 and short stock by setting ratio as
Fluting medium surface layer slurry and fluting medium base pastes, and be pumped in surface layer blending chest and bottom blending chest respectively,
It is uniformly mixed rear spare；
Step 4, T cardboard is manufactured paper with pulp: surface layer slurry in step 3 and bottom slurry are sent after fan pump, pressurized screen respectively to surface layer
With bottom head box into slurry general pipeline Top wire former, through wet end vacuum dehydration to setting mass dryness fraction after, into press section, front and back drying portion,
After the processing such as top sizing, calender, through reel machine, rewinding machine and obtained T cardboard is packed.
During wherein the T cardboard of step 4 is manufactured paper with pulp, surface layer in step 3 is destroyed into forebay and bottom copies slurry in forebay, is passed through after thickening
Fan pump and paper machine enriched water mixed diluting are sent into paper machine through surface layer pressurized screen and bottom pressurized screen to 0.5%~0.6% concentration
Into slurry general pipeline, slurry forms turbulence state under doctor-roll effect in head box for surface layer head box and bottom head box, starches from stream
Case lip sprays, and slurry is combined into l Water Paper page in wet end drainage and formation, then is pumped to mass dryness fraction through high vacuum suction and suction couch roll
After 19%~21%, press section is transferred to by vacuum transfer box, after squeezing web dryness up to 48%~50%, page is premenstrual,
It afterwards after drying section drying, top sizing, hard calender press polish processing, is batched, T cardboard is made in the processes such as rewinding and packaging.
In step 4, the Cypres that top sizing uses are tapioca, and usage amount is 6%~8% pair of over dry fibre
0.1%~0.2% Starch Conversion enzyme is added in dimension, tapioca solid content 8%~10%.
T cardboard made from the preparation method of low grammes per square metre T cardboard ring crush intensity, lateral ring crush index are improved using the present invention
For 8.5~9.5Nm/g, longitudinal 5.0~5.5Km of fracture length, 0.58~0.7g/cm of tightness3。
Working principle: the present invention uses corrugated paper and offset paper for raw material, adds the main function of offset paper
It is the intensity and stiffness for improving T cardboard, fiber composition mainly has softwood pulp and changes newsprint pulp in offset paper.Softwood pulp
Fiber is long and thin, and intensity is good, to helpful at the tearing strength of paper, changes that content of lignin in newsprint pulp is high, and lignin compares fiber
Rugosity is big, stiffness is big, bulk is good, to improve at paper stiffness clearly, T cardboard important technology index ring crush intensity with
Intensity, the stiffness of T cardboard are related with tightness, and therefore, from raw material selection, it is to mention that select corrugated paper and offset paper, which be raw material,
The key of high T cardboard ring crush intensity.
Secondly, fiber is divided into long fibre and staple fiber using fiber classification machine, makes fibre in slurry preparation and process for preparation
Dimension obtains reasonable employment；The tensile strength and tearing strength of long fibre raising paper, the uniformity of staple fiber raising paper, two kinds
Fiber is mixed for the surface layer and bottom of fluting medium in proportion respectively, and the intensity and evenness to T cardboard play good collaboration
Effect, to improve the ring crush intensity of T cardboard.
Meanwhile T paperboard surface sizing is handled using surface sizing technique, improve the surface strength and water-resistance of T cardboard
Can, sizing agent selects tapioca, and a small amount of Starch Conversion enzyme is added, and increases fiber carboxyl-content in slurry, improves starch sizing
Effect, to improve T paper board strength index.
The utility model has the advantages that offset paper contains softwood pulp and reducing rules, softwood pulp fiber intensity itself in the present invention
Good, content of lignin is high in reducing rules, and stiffness is good, plays the role of to the ring crush intensity for improving paper good；The present invention does not use
Internal sizing agent, but in order to improve the intensity index of paper, it is handled using top sizing, Cypres select tapioca, add
Enter a small amount of Starch Conversion enzyme, increase fiber carboxyl-content in slurry, improve starch sizing efficiency, improves T paper board strength index.
In addition, (1) uses low dense online in the papermaking process of T cardboard, fiber alignment is evenly distributed；(2) big roller diameter is used
Squeezing improves line pressure, the tightness and bond strength of paper can be improved；(3) drying section controls drying curve, avoids capable and experienced dry
Each contribute to improve the ring crush intensity of T cardboard Deng, these measures.
Detailed description of the invention
Fig. 1 is technological process of production schematic diagram of the present invention.
Specific embodiment
Preparation method of the invention the following steps are included:
Step 1, raw material selects: selecting corrugated paper and offset paper is raw material；
Step 2, prepared by slurry: after corrugated paper and offset paper are weighed in proportion, it is sent into high density hydraulic pulper,
It is diluted with water to concentration 8%~12%, beating time 20min~25min, temperature 60 C~70 DEG C, the good slurry after size degradation adds water
It is diluted to 3%~5% concentration to be put into good stock tank, thick slurry removes non-fiber class weight impurity through waterpower cleaning machine and drum sieve
Afterwards, it is sent into good slurry spare storage pool；HC Cleaner and scalping removal fiber-like weight are pumped in good stock tank after slurry agitation
Slurry is classified into long fiber pulp and two kinds of short fibered pulp through fiber classification machine by impurity, and short fibered pulp is concentrated through polydisc thickener
Long fiber pulp removes its sicker, polydisc thickener through heat partition system after fine screen and low dense scummer are further processed afterwards
Through defiberizing machine defibrination process after concentration, be stored in long fibre stock tank store it is spare；
Step 3, long fiber pulp obtained in step 2 slurry preparation: is pressed into 70%:30% or 80%:20% proportions
Send into surface layer blending chest stir it is spare；By short fibered pulp obtained by 30%:70% or 20%:80% proportions send to
It is stirred in bottom blending chest spare；
Step 4, T cardboard is manufactured paper with pulp: being pumped to surface layer respectively and copy preceding stock tank surface layer prepared in step 3 slurry and bottom slurry
It is stirred in stock tank before being copied with bottom, the enriched water mixed diluting come after thickening through fan pump and enriched water pond to 0.5%~0.6%
Concentration after, be sent into paper machine side layer head box and bottom head box into slurry general pipeline, slurry through surface layer pressurized screen and bottom pressurized screen
Turbulence state is formed under doctor-roll effect in head box, is sprayed from head box lip, slurry is combined into wet end drainage and formation
L Water Paper page, then after high vacuum suction and suction couch roll are pumped to mass dryness fraction 19%~21%, pressure is transferred to by vacuum transfer box
Squeezing portion, after squeezing web dryness up to 48%~50%, page through forward and backward drying section drying, top sizing, hard calender press polish at
It after reason, is batched, T carton package storage is made in rewinding and packaging process.
In step 4, the Cypres that top sizing uses select tapioca, and usage amount is 6%~8% pair of over dry fibre
0.1%~0.2% Starch Conversion enzyme is added in dimension, tapioca solid content 8%~10%, increases fiber carboxyl-content in slurry,
Starch sizing efficiency is improved, to improve T cardboard ring crush intensity index.
As shown in Figure 1, manufacturing experimently three kinds respectively according to above preparation method is quantitatively respectively 80g/m2、90g/m2、100g/
m2Experimental products A1, A2, A3 and A4, embodiment is as follows:
Embodiment 1, quantification of 80g/m2Product:
The first product A1, raw material are corrugated paper and offset paper, and long fibre is made in ratio 70%:30% after mixing
And short fibered pulp, by 70%:30% proportions, Cypres tapioca 6%, Starch Conversion enzyme 0.1%；
Second of product A2, raw material are corrugated paper and offset paper, and long fibre is made in ratio 75%:25% after mixing
And short fibered pulp, by 70%:30% proportions, Cypres tapioca 8%, Starch Conversion enzyme 0.2%；
The third product A3, raw material are corrugated paper and offset paper, and long fibre is made in ratio 78%:22% after mixing
And short fibered pulp, by 80%:20% proportions, Cypres tapioca 6%, Starch Conversion enzyme 0.1%；
4th kind of product A4, raw material are corrugated paper and offset paper, and long fibre is made in ratio 80%:20% after mixing
And short fibered pulp, by 80%:20% proportions, Cypres tapioca 8%, Starch Conversion enzyme 0.2%.
According to the above experiment proportion, this 80g/m is made2The low grammes per square metre T cardboard of quantitative 4 kinds, through provincial pulping and paper-making emphasis
Laboratory testing Spot detection, quality index are as shown in table 1.
The low grammes per square metre T cardboard primary quality measure contrast table (80g/m of table 12)
Embodiment 2, quantification of 90g/m2Product B1, B2, B3 and B4:
The first product B1, raw material are corrugated paper and offset paper, and long fibre is made in ratio 70%:30% after mixing
And short fibered pulp, by 70%:30% proportions, Cypres tapioca 6%, Starch Conversion enzyme 0.1%；
Second of product B2, raw material are corrugated paper and offset paper, and long fibre is made in ratio 75%:25% after mixing
And short fibered pulp, by 70%:30% proportions, Cypres tapioca 8%, Starch Conversion enzyme 0.2%；
The third product B3, raw material are corrugated paper and offset paper, and long fibre is made in ratio 78%:22% after mixing
And short fibered pulp, by 80%:20% proportions, Cypres tapioca 6%, Starch Conversion enzyme 0.1%；
4th kind of product B4, raw material are corrugated paper and offset paper, and long fibre is made in ratio 80%:20% after mixing
And short fibered pulp, by 80%:20% proportions, Cypres tapioca 8%, Starch Conversion enzyme 0.2%.
According to the above experiment proportion, 90g/m is made2The low grammes per square metre T cardboard of quantitative 4 kinds, it is real through provincial pulping and paper-making emphasis
The detection of Yan Shi inspection center, quality index are as shown in table 2.
The low grammes per square metre T cardboard primary quality measure contrast table (90g/m of table 22)
Embodiment 3, quantification of 100g/m2Products C 1, C2, C3 and C4:
The first products C 1, raw material are corrugated paper and offset paper, and long fibre is made in ratio 70%:30% after mixing
And short fibered pulp, by 70%:30% proportions, Cypres tapioca 6%, Starch Conversion enzyme 0.1%；
Second of products C 2, raw material are corrugated paper and offset paper, and long fibre is made in ratio 75%:25% after mixing
And short fibered pulp, by 70%:30% proportions, Cypres tapioca 8%, Starch Conversion enzyme 0.2%；
The third products C 3, raw material are corrugated paper and offset paper, and long fibre is made in ratio 78%:22% after mixing
And short fibered pulp, by 80%:20% proportions, Cypres tapioca 6%, Starch Conversion enzyme 0.1%；
4th kind of products C 4, raw material are corrugated paper and offset paper, and long fibre is made in ratio 80%:20% after mixing
And short fibered pulp, by 80%:20% proportions, Cypres tapioca 8%, Starch Conversion enzyme 0.2%.
According to the above experiment proportion, 100g/m is made2The low grammes per square metre T cardboard of quantitative 4 kinds, it is real through provincial pulping and paper-making emphasis
The detection of Yan Shi inspection center, quality index are as shown in table 3.
The low grammes per square metre T cardboard primary quality measure contrast table (100g/m of table 32)
According to the above experiment proportion, 3 kinds of quantitative each 4 kinds of low grammes per square metre T cardboards are made, through provincial pulping and paper-making key lab
Inspection center's detection, quality index are shown in Table 1, shown in table 2 and table 3.
By table 1, table 2 and table 3 are it is found that the low quantification of 80~100g/m of grammes per square metre T board sample produced by the invention2, laterally
Ring crush index is 8.5~9.5Nm/g, longitudinal 5.0~5.5Km of fracture length, 0.58~0.7g/cm of tightness3, comply with standard
Defined high-class product index request.
Therefore, foregoing invention embodiment is feasible.
Claims (8)
1. a kind of preparation method for improving low grammes per square metre T cardboard ring crush intensity, it is characterised in that: the following steps are included:
(1) raw material selects: selecting corrugated paper and offset paper is raw material；
(2) prepared by slurry: by corrugated paper and offset paper, after size degradation, removal non-fiber class impurity and fiber-like impurity,
Slurry is classified into long fiber pulp and short fibered pulp, spare after short fibered pulp is concentrated；The further removal impurity of long fiber pulp warp,
Sicker is removed after concentration, then after discongesting it is spare；
(3) long fibre and short stock slurry preparation: are sent into surface layer blending chest and bottom blending chest in proportion respectively
In it is spare；
(4) T cardboard is manufactured paper with pulp: surface layer slurry in step (3) and bottom slurry are sent after fan pump, pressurized screen respectively to surface layer and bottom
Head box is applied after wet end vacuum dehydration to setting mass dryness fraction into press section, front and back drying portion, surface into slurry general pipeline Top wire former
After glue, calender processing, through reel machine, rewinding machine and obtained T cardboard is packed.
2. the preparation method according to claim 1 for improving low grammes per square metre T cardboard ring crush intensity, it is characterised in that: step (2)
In, raw material proportioning is 70%~80% corrugated paper, 20%~30% offset paper.
3. the preparation method according to claim 1 for improving low grammes per square metre T cardboard ring crush intensity, it is characterised in that: step (2)
In, by the corrugated paper and offset paper in step (1), it is added to hydrabrusher size degradation, waterpower cleaning machine and cylinder and weeds out
Unless fiber-like impurity, HC Cleaner and scalping remove fiber-like impurity, slurry is classified into long fiber pulp by fiber classification machine
And short fibered pulp, it is spare in staple fiber reserve pit after short fibered pulp is concentrated；Long fiber pulp is through low dense scummer and pressure fine screen
Further remove impurity, concentrated laggard heat dispersion machine removes sicker, and spare in long fibre reserve pit after discongesting.
4. the preparation method according to claim 1 for improving low grammes per square metre T cardboard ring crush intensity, it is characterised in that: by step
(3) for medium-length fibre in 70%:30% or 80%:20% ratio as surface layer slurry, staple fiber presses 30%:70% or 20%:
80% ratio carries out with slurry as base pastes.
5. the preparation method according to claim 1 for improving low grammes per square metre T cardboard ring crush intensity, it is characterised in that: step (3)
In, long stuff and short stock use instrument automatic slurry-distributing system, and the slurry prepared is respectively fed to surface layer blending chest
With it is spare in bottom blending chest.
6. the preparation method according to claim 1 for improving low grammes per square metre T cardboard ring crush intensity, it is characterised in that: step (4)
In, the surface layer slurry and base pastes that prepare in step (3) are sent respectively and destroy forebay to surface layer and bottom is copied in forebay, after thickening
Through fan pump and paper machine enriched water mixed diluting to 0.5%~0.6%, paper machine side layer head box and bottom head box are sent into slurry
General pipeline, slurry are sprayed from head box again, and are combined into l Water Paper page in wet end drainage and formation, then through high vacuum suction and suction couch roll
After being pumped to mass dryness fraction 19%~21%, it is transferred to press section, web dryness is up to 48%~50% after squeezing, and page is through forward and backward dry
It after dry portion's drying, top sizing, press polish processing, is batched, T cardboard is made in rewinding and packaging.
7. the preparation method according to claim 1 for improving low grammes per square metre T cardboard ring crush intensity, it is characterised in that: step (4)
In, the Cypres that top sizing uses are tapioca, and usage amount is 6%~8% pair of bone dry fiber, and tapioca contains admittedly
0.1%~0.2% Starch Conversion enzyme is added in amount 8%~10%.
8. a kind of using such as the preparation method system described in any item of the claim 1 to 8 for improving low grammes per square metre T cardboard ring crush intensity
T cardboard, it is characterised in that: the T cardboard transverse direction ring crush index is 8.5~9.5Nm/g, longitudinal fracture length 5.0~
5.5Km, 0.58~0.7g/cm of tightness3。
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| CN110528303A (en) * | 2019-07-10 | 2019-12-03 | 湖北金庄科技再生资源有限公司 | Low grammes per square metre electric business package paper pulping system and method |
| CN110983853A (en) * | 2019-11-22 | 2020-04-10 | 山鹰华南纸业有限公司 | Method for producing T paper by long-wire paper machine |
| CN111364268A (en) * | 2020-03-31 | 2020-07-03 | 中山永发纸业有限公司 | Production process of low-basis-weight middle partition paper |
| CN111549561A (en) * | 2020-04-29 | 2020-08-18 | 江苏理文造纸有限公司 | Method for producing multilayer light high-strength corrugated paper |
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Application publication date: 20190604 |