CN111289422B - Prediction method for air permeability of filter paper - Google Patents
Prediction method for air permeability of filter paper Download PDFInfo
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- CN111289422B CN111289422B CN202010263159.8A CN202010263159A CN111289422B CN 111289422 B CN111289422 B CN 111289422B CN 202010263159 A CN202010263159 A CN 202010263159A CN 111289422 B CN111289422 B CN 111289422B
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- 230000035699 permeability Effects 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000002994 raw material Substances 0.000 claims abstract description 11
- 229920001131 Pulp (paper) Polymers 0.000 claims description 11
- 238000002360 preparation method Methods 0.000 claims description 6
- 239000011541 reaction mixture Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 16
- 239000002002 slurry Substances 0.000 abstract description 8
- 238000011002 quantification Methods 0.000 abstract description 7
- 230000008859 change Effects 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 239000002699 waste material Substances 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract description 3
- 238000000227 grinding Methods 0.000 abstract description 2
- 238000012827 research and development Methods 0.000 abstract description 2
- 238000001914 filtration Methods 0.000 description 3
- 238000012356 Product development Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
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Abstract
The invention provides a method for predicting air permeability of filter paper. According to the technical scheme, the filter paper is independently prepared for each slurry for preparing a product to be predicted, and the air permeability of the filter paper is respectively detected; on the basis, weighting is carried out according to the proportion of each slurry in the total raw materials of the product to be predicted, so as to obtain a predicted value under a specific quantitative value; and then correcting according to the multiplying power relation among the quantitative values to obtain a final predicted value. The required product proportion can be preliminarily calculated through a small amount of tests, and then the product proportion is optimized through the small amount of tests, so that the workload of product research and development is greatly reduced; when the method is applied to the production and production change stage, the air permeability of the product after the target quantification is achieved can be evaluated through the quantification and the air permeability of the primary detection, so that whether the fine grinding needs to be adjusted or not can be judged in advance, the production and production change time is shortened, and the production waste is reduced.
Description
Technical Field
The invention relates to the technical field of filter paper performance evaluation, in particular to a method for predicting air permeability of filter paper.
Background
The filter paper is a kind of functional paper, plays the role of a filter material through micropores formed by internal fibers, and is widely applied to various biochemical experiments and industrial production. The performance of the filter paper has a direct influence on the filtering effect, and the performance of the filter paper is mainly divided into two aspects, namely the filtering characteristic of the filter paper and the physical characteristic; filtration properties include air permeability, maximum pore size, average pore size, and physical properties include basis weight, thickness, stiffness, burst, resin content, and the like.
Air permeability is the amount of air passing through the filter paper per unit time in a certain area and a certain degree of vacuum, and is an important technical index for evaluating the filter paper. At present, in a product development stage and a production and transformation adjustment stage, whether the air permeability of the product is appropriate or not is judged through detection of an air permeability meter, so that more small tests are needed in the product development stage, the workload is high, the time consumption is high, the efficiency is low, the air permeability of the paper product is judged to be appropriate or not in the production and transformation stage, the product must be quantitatively adjusted to a target value and then detected and judged, the time consumption is high, the narrow width is introduced, and the waste of the production process is high. In view of the above, if the air permeability of the finished filter paper product can be predicted in advance according to the properties of the slurry before the finished product is prepared, the experimental workload is expected to be reduced, the production change time is shortened, the production waste is reduced, and the method has a more guiding significance for the component design of the product.
Disclosure of Invention
The invention aims to provide a method for predicting the air permeability of filter paper aiming at the technical defects in the prior art, and aims to solve the technical problem that the air permeability of a finished filter paper product is difficult to predict in advance according to the property of slurry in the prior art.
Another technical problem to be solved by the present invention is how to fully ensure the accuracy of the above prediction method.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a method for predicting filter paper air permeability, comprising:
1) the air permeability of the product to be predicted, quantified as a, is calculated by formula 1:
Xa＝W1f1+W2f2+…+Wnfn
formula 1
In the formula 1, the reaction mixture is,
Xa: quantifying the air permeability of the product to be predicted with a;
Wn: the nth paper pulp serving as a raw material for preparing the product to be predicted is independently used for preparing filter paper with a quantitative value a, and the air permeability obtained by detecting the filter paper is detected;
fn: the nth paper pulp serving as a preparation raw material of the product to be predicted accounts for the total weight of the preparation raw materials of the product to be predicted;
2) the air permeability of the product to be predicted, quantified b, is calculated by equation 2:
Xb＝Xaa/b
formula 2
In the formula 2, the first step is,
Xb: air permeability of the product to be predicted is quantified as b.
Preferably, a is 100g/m2。
Preferably, the method calculates the deviation between the air permeability and the measured value to be not more than 3%.
In the above technical solution, the "quantification" is a technical index of the filter paper, and means the mass of the filter paper per square meter, and the unit is g/m2。
The prediction method of the present invention is exemplified below:
1. the air permeability of the filter paper can be calculated by multiplying and adding the properties of each slurry in proportion;
2. the product of the air permeability multiplied by the ration of the product in the same proportion under the same process condition is unchanged, such as:
1) 100% HPZ pulp ration 100g/m2The air permeability is 0.6 s;
2) 100% NBKP slurry ration 100g/m2The air permeability is 6 s;
then 50% HPZ pulp + 50% NBKP pulp ratio pulp, the ration is 100g/m2The air permeability of the product of (a) is:
50％HPZ+50％NBKP＝0.5*0.6+0.5*6＝3.3s。
if the product has a basis weight of 120g/m2The air permeability in the ratio is as follows: 100/120 × 3.3 ═ 2.75 s.
The invention provides a method for predicting air permeability of filter paper. According to the technical scheme, the filter paper is independently prepared for each slurry for preparing a product to be predicted, and the air permeability of the filter paper is respectively detected; on the basis, weighting is carried out according to the proportion of each slurry in the total raw materials of the product to be predicted, so as to obtain a predicted value under a specific quantitative value; and then correcting according to the multiplying power relation among the quantitative values to obtain a final predicted value. The required product proportion can be preliminarily calculated through a small amount of tests, and then the product proportion is optimized through the small amount of tests, so that the workload of product research and development is greatly reduced; when the method is applied to the production and production change stage, the air permeability of the product after the target quantification is achieved can be evaluated through the quantification and the air permeability of the primary detection, so that whether the fine grinding needs to be adjusted or not can be judged in advance, the production and production change time is shortened, and the production waste is reduced.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
A method for predicting filter paper air permeability, comprising:
1) the air permeability of the product to be predicted, quantified as a, is calculated by formula 1:
Xa＝W1f1+W2f2+…+Wnfn
formula 1
In the formula 1, the reaction mixture is,
Xa: quantifying the air permeability of the product to be predicted with a;
Wn: the nth paper pulp serving as a raw material for preparing the product to be predicted is independently used for preparing filter paper with a quantitative value a, and the air permeability obtained by detecting the filter paper is detected;
fn: the nth paper pulp serving as a preparation raw material of the product to be predicted accounts for the total weight of the preparation raw materials of the product to be predicted;
2) the air permeability of the product to be predicted, quantified b, is calculated by equation 2:
Xb＝Xaa/b
formula 2
In the formula 2, the first step is,
Xb: air permeability of the product to be predicted is quantified as b.
Wherein, the value of a is 100g/m2。
The accuracy and effectiveness of the method of the invention are verified by the following test procedures.
TABLE 1 quantification of six wood pulps at 100g/m2Air permeability of
Sheet air permeability at the formulation of RF2257 in Table 2
By the above table: the measured average value was 836.5 and the theoretical calculation was 835.7, and the values were regarded as the same number in consideration of the influence of conditions such as the uniformity of sheet formation. Therefore, the air permeability under different proportions can be preliminarily calculated through the air permeability of the wood pulp.
Sheet air permeability under the formula of RF3148 of Table 3
From the above table, it can be seen that the deviation between the theoretical value and the measured value is within 3%, and the deviation is acceptable in consideration of the uniformity of sheet making.
Sheet air permeability at type RF3148 ratios in Table 4
1. 120g/m at the mixture ratio2Has an air permeability of 893L/m2S, according to the third table, is 100g/m2Theoretical calculation of sheet air permeability of 120g/m2The air permeability is 1078 × 100/120 ═ 898L/m2S, and the actual sheet permeability is 893L/m2S, difference between theoretical and measured values, 5L/m2S, this should be related to the sheet uniformity.
2. Calculating 120g/m according to the theory of wood pulp air permeability2Air permeability of 918L/m2S, according to the deviation between the theoretical value of the air permeability of the wood pulp and the measured value of the papermaking sheet, which is 2.7 percent and is also within 3 percent, the theory that the product of the quantification and the air permeability is not changed under the same process condition is established and can be used as a guiding theory for calculation before a test and a production process.
The embodiments of the present invention have been described in detail, but the description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. A method for predicting air permeability of filter paper, comprising:
1) the air permeability of the product to be predicted, quantified as a, is calculated by formula 1:
Xa＝W1f1+W2f2+…+Wnfn
formula 1
In the formula 1, the reaction mixture is,
Xa: quantifying the air permeability of the product to be predicted with a;
Wn: the nth paper pulp serving as a raw material for preparing the product to be predicted is independently used for preparing filter paper with a quantitative value a, and the air permeability obtained by detecting the filter paper is detected;
fn: the nth paper pulp serving as a preparation raw material of the product to be predicted accounts for the total weight of the preparation raw materials of the product to be predicted;
2) the air permeability of the product to be predicted, quantified b, is calculated by equation 2:
Xb＝Xa a/b
formula 2
In the formula 2, the first step is,
Xb: quantifying the air permeability of the product to be predicted with b;
the types and the proportions of wood pulp of the product to be predicted with the quantitative amount of a are equal to those of the product to be predicted with the quantitative amount of b.
2. The method for predicting filter paper air permeability according to claim 1, wherein a is 100g/m2。
3. The method of claim 1, wherein the air permeability of the filter paper is calculated to have a deviation of no more than 3% from an observed value.
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| CN202010263159.8A CN111289422B (en) | 2020-04-07 | 2020-04-07 | Prediction method for air permeability of filter paper |
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| CN202010263159.8A CN111289422B (en) | 2020-04-07 | 2020-04-07 | Prediction method for air permeability of filter paper |
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| CN111289422B true CN111289422B (en) | 2021-09-14 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760987A (en) * | 2008-11-28 | 2010-06-30 | 山东福荫造纸环保科技有限公司 | High-air-permeability mixed pulp and household paper made thereof |
| CN104502250A (en) * | 2014-12-22 | 2015-04-08 | 云南中烟工业有限责任公司 | Method for predicting actually measured values of air permeability of cigarette forming paper in different altitudes of regions |
| TW201700833A (en) * | 2015-04-30 | 2017-01-01 | 王子控股股份有限公司 | Sterilization paper and sterilization package |
| JP2018039911A (en) * | 2016-09-07 | 2018-03-15 | 王子ホールディングス株式会社 | Thermally adhesive filter and method for producing the same |
| CN108333094A (en) * | 2018-01-29 | 2018-07-27 | 广东中烟工业有限责任公司 | A kind of projectional technique of air permeance for cigarette paper |
| CN109813646A (en) * | 2019-03-21 | 2019-05-28 | 红云红河烟草(集团)有限责任公司 | Method for predicting cigarette resistance |
-
2020
- 2020-04-07 CN CN202010263159.8A patent/CN111289422B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101760987A (en) * | 2008-11-28 | 2010-06-30 | 山东福荫造纸环保科技有限公司 | High-air-permeability mixed pulp and household paper made thereof |
| CN104502250A (en) * | 2014-12-22 | 2015-04-08 | 云南中烟工业有限责任公司 | Method for predicting actually measured values of air permeability of cigarette forming paper in different altitudes of regions |
| TW201700833A (en) * | 2015-04-30 | 2017-01-01 | 王子控股股份有限公司 | Sterilization paper and sterilization package |
| JP2018039911A (en) * | 2016-09-07 | 2018-03-15 | 王子ホールディングス株式会社 | Thermally adhesive filter and method for producing the same |
| CN108333094A (en) * | 2018-01-29 | 2018-07-27 | 广东中烟工业有限责任公司 | A kind of projectional technique of air permeance for cigarette paper |
| CN109813646A (en) * | 2019-03-21 | 2019-05-28 | 红云红河烟草(集团)有限责任公司 | Method for predicting cigarette resistance |
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