CN100580180C - Cardboard thickening agent and manufacturing method and uses thereof - Google Patents
Cardboard thickening agent and manufacturing method and uses thereof Download PDFInfo
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- CN100580180C CN100580180C CN200710113954A CN200710113954A CN100580180C CN 100580180 C CN100580180 C CN 100580180C CN 200710113954 A CN200710113954 A CN 200710113954A CN 200710113954 A CN200710113954 A CN 200710113954A CN 100580180 C CN100580180 C CN 100580180C
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Abstract
The invention relates to an intensifier for cardboard production and the production method and application thereof. In order to adapt change of imported wastepaper fiber material, to save fiber cost of cardboard production and to increase indexes of cardboard as thickness, stiffness, etc., the invention uses waste materials of wood processing or furniture production, such as wood flour and chips, etc., after processing of talc modification, a cardboard intensifier of simple production technology, low cost and obvious effect is developed. The cardboard intensifier of the invention can be applied to cardboard production, thickness of the cardboard can be effectively improved, and compared with secondary fiber material, the intensifier has very obvious cost advantage.
Description
Technical field
The present invention relates to a kind of intensifier and manufacture method and application that is applied to the field of papermaking production.
Background technology
In recent years, along with China's rapid economy development, for the annual maintenance of the demand double-digit growth of papermaking product especially cardboard.Because the production of cardboards such as coated duplex board with grey back, boxboard, corrugated paper, craft paper all needs to use a large amount of secondary stocks, cause the price of imported waste paper constantly soaring, and a lot of waste paper even reuse are crossed four or five times, the quality of waste paper descends to some extent, and such fibrous raw material has brought very big difficulty for high-quality production.Wherein Zui Da problem is exactly that the thickness index of cardboard is poor, the usual method of paper plant be increase cardboard quantitatively, with thickness and the index of correlation that reaches expectation, so just increased the consumption of fibrous raw material, increased production cost.The intensifier that a kind of high molecular polymer class of chemical synthesis is arranged in the prior art, but because its cost is higher, can't in, apply in the low-grade board product, and its raw material relies on petrochemicals, exists certain problem of environmental pollution in the process of production.
The paper pulp that is used to make cardboard in the prior art divides from pulping process and mainly contains two kinds.
A kind of is chemical pulp, is that the lignin in the string is removed by chemical method, isolates the purpose that fiber is used for papermaking to reach.Chemical pulp has good physical strength, helps improving the indexs such as folding strength, tensile strength and ring crush intensity of cardboard, but because in pulping process, has removed lignin in large quantities, and chemical pulp there is no advantage to indexs such as the thickness that improves cardboard and deflections.
The traditional intensifier that uses in producing is at present formed by the chemical method manufacturing, and content of ashes has only 20%, and it is unsatisfactory to thicken effect, and price is higher, and 30,000 yuan of needs per ton have greatly increased production cost.
Another kind is a mechanical pulp, is with mechanical method plant material to be separated into paper pulp.This pulping process has kept lignin basically fully, and adapted part mechanical pulp in the chemical pulp helps improving indexs such as the thickness of cardboard and deflection, but unfavorable to other intensity index.
Summary of the invention
After the present invention aims to provide a kind of waste material to Wood Processing and carries out modification processing, the technical scheme of producing cardboard thickening agent, the indexs such as thickness that the described cardboard thickening agent production technology of this programme is simple, with low cost, can significantly improve cardboard.
The present invention is achieved through the following technical solutions:
A kind of cardboard thickening agent, its raw material includes wood powder and talcum powder in forming, and constituent content is wood powder 70-75 part, talcum powder 25-30 part.
The content of ashes of this intensifier is 25%-30% (weight %), and density is 0.8-1.0.Can reach the purpose of well mixing with paper pulp.If ash content is too low, density is less than normal, causes " laitance " phenomenon easily; If ash content is too high, density is bigger than normal, then causes " heavy slurry " phenomenon easily.
The used wood powder of the present invention is for gathering the waste material from Wood Processing or furniture production, through the wood powder or the wood fragments bits of Screening Treatment.(consumption is pressed dry weight basis.)
The used talcum powder of the present invention is for gathering from the talcum mine, through the talcum powder of grinding, Screening Treatment.(consumption is pressed dry weight basis.)
The manufacture method of cardboard thickening agent of the present invention may further comprise the steps:
(1) optimize wood powder: common wood powder carries out homogeneous, thinning processing through grinder, and the wood powder mass dryness fraction requires must not contain big hard impurities such as ironware, stone more than 85%.
(2) carry out Screening Treatment through 80 mesh sieves;
(3) add the above talcum powder of 325 orders in the wood powder after the Screening Treatment, enter stock chest, obtain cardboard thickening agent through mixing in the screw extrusion blender and after regulating its ash.
In the actual production process,, regulate ash content by adjustment wood powder, talcum powder ratio according to different production needs.
Above-mentioned cardboard thickening agent is used in actual production process in the following manner:
(1) under the normal temperature, 15-20 part cardboard thickening agent is evenly mixed in mixing pit with 40-45 part water, add water move to concentration and be 10% pulpous state;
(2) above-mentioned cardboard is thickened slurry and pour pressurized screen, screening and removing impurities matter into;
(3) intensifier (weight %) that adds 8-15% in the cardboard core slurry that in the double plate mill, flows out.The core slurry that adds intensifier finally enters the paper machine through core slurry mill after-bay, paper machine after copying forebay, fan pump again.
Cardboard thickening agent of the present invention is controlled at about 8-15% in the addition of back flow liner.Addition is too low, thickens DeGrain; Addition is too high, and hypertrichiasis then may to cause the low and cut paper end face paper of cardboard internal bond strength, influences the printing and the use of cardboard.
The beneficial effect of this programme: can learn according to the narration to such scheme, contain a large amount of lignin in the cardboard thickening agent of the present invention, when making cardboard, its action effect is equivalent to add mechanical pulp.In addition, because this intensifier is produced with the dry grinding method, so the section of Hainan Ervatamia Root fiber edge is more neat, thereby the hydroxyl that comes out seldom, this makes xylon and the paper pulp of producing cardboard not have hydrogen bonded basically, can play the filling effect that is similar to the paper grade (stock) filler to a certain extent, that is to say, make cardboard become more loose, the thickness of cardboard can improve 2-5%.In addition, because the raw material of this intensifier comes from the waste material that Wood Processing or furniture are made, its cost is very cheap, only be equivalent to chemical pulp 1/11 and mechanical pulp 1/8 and secondary stock about 1/4, thereby have fairly obvious cost advantage.
The specific embodiment
The present invention will be further described below in conjunction with concrete instance.
Embodiment 1
(1) common wood powder carries out homogeneous, thinning processing through grinder, and the wood powder mass dryness fraction is 88%, does not contain hard impurity.
(2) carry out Screening Treatment through 80 mesh sieves;
(3) add 325 order talcum powder in the wood powder after the Screening Treatment, enter stock chest, obtain cardboard thickening agent through mixing in the screw extrusion blender and after regulating its ash.
Embodiment 2
(1) under the normal temperature, 15 parts of cardboard thickening agents is evenly mixed in mixing pit with 40 parts of water, add water move to concentration and be 10% pulpous state;
(2) above-mentioned cardboard is thickened slurry and pour pressurized screen, screening and removing impurities matter into;
(3) intensifier (weight %) of adding 15% in the cardboard core slurry that in the double plate mill, flows out.The core slurry that adds intensifier finally enters the paper machine through core slurry mill after-bay, paper machine after copying forebay, fan pump again.
To produce 250g/m
2The coating coated duplex board with grey back is an example, under the constant situation of other condition, uses the intensifier among the present invention, and the relative core slurry of used weight weight is 10% o'clock, becomes paper thickness can improve about 5 μ m.
Under the situation of same one-tenth paper thickness, can save paper pulp and be about 4.2g/m
2
For an annual production is 100,000 tons paperboard mill, can save 2,500,000 yuans of fibrous raw material costs every year.
Choose the several embodiment in numerous Example formulations below, further specify beneficial effect of the present invention.
To produce 250g/m
2The coating coated duplex board with grey back is example (each consumption statistics is at least 50):
Table 1 intensifier consumption and cardboard respectively become the relation of paper index
| Intensifier consumption % | 0 | 5 | 8 | 12 | 15 | 18 | 20 |
| Paper basis weight g/m 2 | 250.12 | 249.36 | 251.06 | 252.15 | 251.51 | 248.79 | 249.81 |
| Become paper thickness μ m | 304.97 | 305.11 | 308.73 | 313.26 | 315.32 | 316.59 | 316.41 |
| Become paper bulk cm 3/g | 1.219 | 1.224 | 1.230 | 1.242 | 1.254 | 1.273 | 1.267 |
| Become paper tightness g/cm 3 | 0.820 | 0.817 | 0.813 | 0.805 | 0.797 | 0.786 | 0.789 |
Fig. 1 intensifier consumption with become paper thickness relationship figure.
Can see from table 1, Fig. 1, along with the increase of intensifier consumption, become the corresponding increase of thickness of paper. But aborning, if when this intensifier consumption surpassed 15%, hypertrichiasis for the paper that cardboard produces when cutting, and is unfavorable for client's use; And when consumption less than 8% the time, it thickens DeGrain. When consumption during at 8%-15%, both can be thickened preferably effect, other quality of product is also unaffected simultaneously.
Claims (4)
1. cardboard thickening agent, it is characterized in that: the raw material of described cardboard thickening agent is made up of wood powder and talcum powder, and constituent content is pressed dry weight basis wood powder 70--75 part, talcum powder 25--30 part.
2. cardboard thickening agent as claimed in claim 1 is characterized in that: the content of ashes of described cardboard thickening agent is 25%-35% (weight %), and density is 0.8-1.0.
3. the manufacture method of cardboard thickening agent as claimed in claim 1 or 2 may further comprise the steps:
(1) optimize wood powder: common wood powder carries out homogeneous, thinning processing through grinder, and the wood powder mass dryness fraction requires more than 85%, does not contain ironware, hard impurity that stone is big;
(2) carry out Screening Treatment through 80 mesh sieves;
(3) add the above talcum powder of 325 orders in the wood powder after the Screening Treatment, enter stock chest, obtain cardboard thickening agent through mixing in the screw extrusion blender and after regulating its ash content.
4. the application of cardboard thickening agent as claimed in claim 1 is characterized in that:
(1) under the normal temperature, 15-20 part cardboard thickening agent is evenly mixed in mixing pit with 40-45 part water, be adjusted to concentration and be 10% pulpous state;
(2) cardboard is thickened slurry and pour pressurized screen into, impurity is removed in screening;
(3) intensifier that adds 8-15wt% in the cardboard core slurry that in the double plate mill, flows out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710113954A CN100580180C (en) | 2007-10-24 | 2007-10-24 | Cardboard thickening agent and manufacturing method and uses thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710113954A CN100580180C (en) | 2007-10-24 | 2007-10-24 | Cardboard thickening agent and manufacturing method and uses thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101161932A CN101161932A (en) | 2008-04-16 |
| CN100580180C true CN100580180C (en) | 2010-01-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN200710113954A Expired - Fee Related CN100580180C (en) | 2007-10-24 | 2007-10-24 | Cardboard thickening agent and manufacturing method and uses thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101362927B (en) * | 2008-09-18 | 2013-01-23 | 张东成 | Additive agent for preparation of artificial board cementing compound and preparation method thereof |
| CN105088856A (en) * | 2015-08-10 | 2015-11-25 | 金华盛纸业（苏州工业园区）有限公司 | Method for increasing thickness of cultural paper |
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Granted publication date: 20100113 Termination date: 20161024 |