CN114136260A - Method for measuring comprehensive performance of moso bamboo paper cup - Google Patents
Method for measuring comprehensive performance of moso bamboo paper cup Download PDFInfo
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- CN114136260A CN114136260A CN202111026651.4A CN202111026651A CN114136260A CN 114136260 A CN114136260 A CN 114136260A CN 202111026651 A CN202111026651 A CN 202111026651A CN 114136260 A CN114136260 A CN 114136260A
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- 238000000034 method Methods 0.000 title claims abstract description 35
- 244000302661 Phyllostachys pubescens Species 0.000 title claims abstract description 12
- 235000003570 Phyllostachys pubescens Nutrition 0.000 title claims abstract description 12
- 238000005470 impregnation Methods 0.000 claims abstract description 46
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims abstract description 43
- 235000017491 Bambusa tulda Nutrition 0.000 claims abstract description 43
- 241001330002 Bambuseae Species 0.000 claims abstract description 43
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims abstract description 43
- 239000011425 bamboo Substances 0.000 claims abstract description 43
- 239000000126 substance Substances 0.000 claims abstract description 35
- 239000007788 liquid Substances 0.000 claims abstract description 29
- 230000009172 bursting Effects 0.000 claims abstract description 15
- 238000001514 detection method Methods 0.000 claims description 40
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000003513 alkali Substances 0.000 claims description 7
- 238000012216 screening Methods 0.000 claims description 6
- 238000005406 washing Methods 0.000 claims description 6
- 239000002699 waste material Substances 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 5
- 238000007598 dipping method Methods 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 101000666901 Oxyuranus scutellatus scutellatus Kunitz-type serine protease inhibitor taicotoxin Proteins 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 claims description 3
- 230000008030 elimination Effects 0.000 claims description 3
- 238000003379 elimination reaction Methods 0.000 claims description 3
- 238000003958 fumigation Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 235000011121 sodium hydroxide Nutrition 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 229920001131 Pulp (paper) Polymers 0.000 abstract description 12
- 238000011160 research Methods 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 description 19
- 239000000523 sample Substances 0.000 description 11
- 238000004537 pulping Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000002585 base Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000010297 mechanical methods and process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 206010061592 cardiac fibrillation Diseases 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002600 fibrillogenic effect Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
- G01B21/08—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness for measuring thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N19/00—Investigating materials by mechanical methods
- G01N19/04—Measuring adhesive force between materials, e.g. of sealing tape, of coating
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
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Abstract
The invention provides a method for measuring the comprehensive performance of a moso bamboo paper cup, which comprises the steps of detecting the bulk performance and the strength performance, wherein the strength performance comprises the steps of detecting the tensile strength, the rupture strength and the tearing strength, pretreating bamboo chips, carrying out chemical impregnation and grinding, dividing chemical impregnation liquid into a plurality of concentration gradients, putting the same amount of bamboo chips into each impregnation liquid sample with the same volume, measuring the Canadian freeness of the pulp sample, making paper sheets in a paper sheet former according to a relevant standard, measuring the relationship among the bulk, the tensile performance, the tearing strength and the rupture strength of each sample paper sheet and the Canadian freeness and the bulk of the samples with different concentrations, and preparing a table. The measuring method researches the influence of the concentration of the chemical impregnation liquid on the bulk, tensile strength, bursting strength and tearing strength of the paper cup, so that the concentration of the chemical impregnation liquid is conveniently and reasonably adjusted when the virgin pulp of the paper cup is produced, high-quality paper pulp is conveniently produced, and the use cost of the chemical impregnation liquid is reduced.
Description
Technical Field
The invention relates to the technical field of papermaking, in particular to a method for measuring comprehensive performance of a moso bamboo paper cup.
Background
The strength of the pulp mainly includes tensile strength, bursting strength, tear strength and the like. The tensile strength and the bursting strength are mainly related to the bonding strength between paper-forming fibers, and the magnitude of the bonding strength is mainly determined by the bonding quantity of chemical bonds (hydrogen bonds) between the paper-forming fibers. If the paper-making fiber is high in beating or refining degree and the devillicate brooming degree of fiber cell walls is good, the specific surface area of the fiber is large, and the exposed hydrogen bonds are more, so that more hydrogen bond combinations are formed among the fibers during paper-making, and the final paper-making has good combination strength. The tear strength is generally more related to the average fiber length of the paper-making fibers, but for chemi-mechanical pulp, the tear strength of the pulp is not very related to the average fiber length of the pulp, and is mainly related to the bond strength of the pulp fibers. This is probably because, when pulping by the chemi-mechanical method, the pulp fibers are mainly separated by the mechanical action of the disc mill due to the small amount of the impregnating chemicals, so that the difference in average length of the chemi-mechanical pulp fibers prepared from different raw materials is not large, and the good presoaking can fully soften and swell the fiber raw materials, which is beneficial to better devillicate and brooming of the fibers in the pulping process, and the pulp fibers have better bonding strength and tearing strength. Therefore, by adopting the chemical mechanical pulping method, the bonding strength and the tearing strength of the paper pulp can be directly determined by good chemical pre-soaking effect and proper pulping process technology.
Therefore, the method for measuring the comprehensive performance of the mao bamboo paper cup has important significance for adjusting the performance of paper pulp in the chemical paper pulp process so as to obtain paper with excellent performance.
Disclosure of Invention
The invention aims to provide a method for measuring the comprehensive performance of a mao bamboo paper cup, which researches the influence of the concentration of a chemical impregnation liquid on the bulk, tensile strength, bursting strength and tearing strength of the paper cup, so that the concentration of the chemical impregnation liquid is conveniently and reasonably adjusted when the virgin pulp of the paper cup is produced, high-quality paper pulp is conveniently produced, the use cost of the chemical impregnation liquid is reduced, and the pollution of the chemical impregnation liquid to the environment is reduced.
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for measuring comprehensive performance of a moso bamboo paper cup comprises bulk property detection and strength property detection, wherein the strength property detection comprises tensile strength detection, bursting strength detection and tearing strength detection, and specifically comprises the following steps:
and (3) detecting the bulk property: firstly, screening bamboo chips, collecting qualified bamboo chips, cutting the bamboo chips into fixed-length dust removal, sealing and storing the bamboo chips with a plastic bag, balancing moisture, washing the bamboo chips with hot water, dehydrating and fumigating the bamboo chips, extruding the bamboo chips by a TSPI extruder, carrying out chemical impregnation on the extruded materials, dividing chemical impregnation liquid into a plurality of concentration gradients, putting the bamboo chips with the same quantity into each impregnation liquid sample with the same volume, washing pulp after impregnation, collecting extruded thick waste liquid, measuring the pH value, residual alkali and solid content of the waste liquid, carrying out latency elimination on the washed pulp, screening, measuring the Canadian freeness of the pulp, manufacturing 60g/m2 paper sheets in a paper sheet former according to relevant standards, drying at constant temperature and humidity, measuring the bulk of each sample paper, observing the relation between the Canadian freeness and the bulk of samples with different concentrations, and preparing a table;
and (3) testing the tensile strength: measuring the tensile property of each paper sample in the bulk property detection process, observing the relation between the Canadian freeness and the tensile property of samples with different concentrations, and preparing a table;
and (3) detecting the burst strength: taking each paper sample in the bulk property detection process to measure the bursting strength of each paper, observing the relation between the Canadian freeness and the bursting strength of samples with different concentrations, and preparing a table;
and (3) detecting the tearing strength: and taking each paper sample in the bulk property detection process to measure the tear strength of each paper, observing the relation between the Canadian freeness and the tear strength of the samples with different concentrations, and preparing a table.
Preferably, the fumigation temperature in the bulk property detection is 80-90 ℃.
Preferably, the bamboo chips are cut to a fixed length of 3-5 cm in the bulk property test.
Preferably, the chemical impregnation in the bulk property detection adopts caustic soda impregnation.
Preferably, the dipping temperature in the bulk property detection is 65-80 ℃.
Preferably, the immersion time in the bulk property test is 5 to 7 hours.
The invention provides a method for measuring the comprehensive performance of a moso bamboo paper cup. The method has the following beneficial effects:
1. the method for measuring the comprehensive performance of the moso bamboo paper cup provided by the invention probes the influence of the concentration of the chemical impregnation liquid on the bulk, tensile strength, bursting strength and tearing strength of the paper cup, so that the concentration of the chemical impregnation liquid is reasonably adjusted when the virgin pulp of the paper cup is produced, high-quality paper pulp is produced conveniently, the use cost of the chemical impregnation liquid is reduced, and the pollution of the chemical impregnation liquid to the environment is reduced.
Drawings
FIG. 1 is a schematic diagram showing the bulk of a slurry of a bamboo chemical-mechanical pulping machine according to the present invention;
FIG. 2 is a comparative schematic view of the tensile strength of the machine-pulped bamboo of the present invention;
FIG. 3 is a comparative schematic diagram of the burst strength of the phyllostachys edulis chemi-mechanical pulp of the present invention;
FIG. 4 is a comparative schematic of the tear strength of the machine pulp of the present invention.
Detailed Description
The invention is further described with reference to the following drawings and detailed description:
as shown in fig. 1 to 4, a method for measuring comprehensive properties of a mao bamboo paper cup comprises bulk property detection and strength property detection, wherein the strength property detection comprises tensile strength detection, burst strength detection and tear strength detection, and specifically comprises the following steps:
and (3) detecting the bulk property: firstly, screening bamboo chips, collecting qualified bamboo chips, cutting the bamboo chips into fixed-length dust removal, sealing and storing the bamboo chips with a plastic bag, balancing moisture, washing the bamboo chips with hot water, dehydrating and fumigating the bamboo chips, extruding the bamboo chips by a TSPI extruder, carrying out chemical impregnation on the extruded materials, dividing chemical impregnation liquid into a plurality of concentration gradients, putting the bamboo chips with the same quantity into each impregnation liquid sample with the same volume, washing pulp after impregnation, collecting extruded thick waste liquid, measuring the pH value, residual alkali and solid content of the waste liquid, carrying out latency elimination on the washed pulp, screening, measuring the Canadian freeness of the pulp, manufacturing 60g/m2 paper sheets in a paper sheet former according to relevant standards, drying at constant temperature and humidity, measuring the bulk of each sample paper, observing the relation between the Canadian freeness and the bulk of samples with different concentrations, and preparing a table;
and (3) testing the tensile strength: measuring the tensile property of each paper sample in the bulk property detection process, observing the relation between the Canadian freeness and the tensile property of samples with different concentrations, and preparing a table;
and (3) detecting the burst strength: taking each paper sample in the bulk property detection process to measure the bursting strength of each paper, observing the relation between the Canadian freeness and the bursting strength of samples with different concentrations, and preparing a table;
and (3) detecting the tearing strength: and taking each paper sample in the bulk property detection process to measure the tear strength of each paper, observing the relation between the Canadian freeness and the tear strength of the samples with different concentrations, and preparing a table.
The fumigation temperature in the bulk property detection is 80-90 ℃, the bamboo chips in the bulk property detection are cut to a fixed length of 3-5 cm, the chemical impregnation in the bulk property detection is performed by caustic soda impregnation, the impregnation temperature in the bulk property detection is 65-80 ℃, and the impregnation time in the bulk property detection is 5-7 hours.
FIG. 1 shows that the relationship between the bulk and the impregnation conditions of the slurry prepared from Phyllostachys pubescens is large. The bulk of the pulp produced decreases with increasing alkali usage in the impregnation stage, while at the same time, the bulk of the pulp produced decreases with decreasing canadian freeness for the same amount of alkali used for impregnation. The reason is that the bamboo chips have better dipping effect and more sufficient softening effect along with the increase of the dosage of chemicals, the fiber fibrillation effect of the paper pulp is better in the pulping process, and the combination between fibers is better and more compact when paper sheets are formed, so that higher tightness is shown. However, in order to ensure excellent bulk properties of the pulp, the amount of chemicals used in the impregnation stage should be minimized and the degree of refining of the pulp should be as low as possible while meeting the strength properties of the paper product.
Fig. 2 to 4 show that the tensile strength, bursting strength and tear strength of the pulp prepared by the chemical mechanical process of moso bamboo are all improved with the increase of the impregnation dosage. The bamboo chips are softened and swelled more fully along with the increase of the dosage of the impregnation section, so that the pulp fibers are easy to separate in the pulping process, better devillicate brooming is obtained, the damage and cutting to the fibers in the pulping process are reduced, and the pulp has better tearing strength and bonding strength. Therefore, the strength performance of the pulp can be improved by properly increasing the chemical dosage of the impregnation section so as to meet the pulp quality requirement of the end product. The total alkali consumption for dipping is below 7 percent to prepare the bamboo chemi-mechanical pulp (about 300 mL) with the tensile strength lower than 25N.m 2/g. The pulp for the paper cup base paper is required to have excellent tensile strength (more than or equal to 25N.m2/g), so that the total alkali consumption of the impregnation section is required to exceed 7 percent when the chemimechanical pulp for the paper cup base paper is prepared by taking moso bamboos as raw materials.
In conclusion, the method for measuring the comprehensive performance of the mao bamboo paper cup provided by the invention researches the influence of the concentration of the chemical impregnation liquid on the bulk, tensile strength, bursting strength and tearing strength of the paper cup, so that the concentration of the chemical impregnation liquid is conveniently and reasonably adjusted when the virgin pulp of the paper cup is produced, high-quality paper pulp is conveniently produced, the use cost of the chemical impregnation liquid is reduced, and the pollution of the chemical impregnation liquid to the environment is reduced.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A method for measuring comprehensive performance of a moso bamboo paper cup comprises bulk property detection and strength property detection, wherein the strength property detection comprises tensile strength detection, bursting strength detection and tearing strength detection, and specifically comprises the following steps:
and (3) detecting the bulk property: firstly, screening bamboo chips, collecting qualified bamboo chips, cutting the bamboo chips into fixed-length dust removal, sealing and storing the bamboo chips with a plastic bag, balancing moisture, washing the bamboo chips with hot water, dehydrating and fumigating the bamboo chips, extruding the bamboo chips by a TSPI extruder, carrying out chemical impregnation on the extruded materials, dividing chemical impregnation liquid into a plurality of concentration gradients, putting the bamboo chips with the same quantity into each impregnation liquid sample with the same volume, washing pulp after impregnation, collecting extruded thick waste liquid, measuring the pH value, residual alkali and solid content of the waste liquid, carrying out latency elimination on the washed pulp, screening, measuring the Canadian freeness of the pulp, manufacturing 60g/m2 paper sheets in a paper sheet former according to relevant standards, drying at constant temperature and humidity, measuring the bulk of each sample paper, observing the relation between the Canadian freeness and the bulk of samples with different concentrations, and preparing a table;
and (3) testing the tensile strength: measuring the tensile property of each paper sample in the bulk property detection process, observing the relation between the Canadian freeness and the tensile property of samples with different concentrations, and preparing a table;
and (3) detecting the burst strength: taking each paper sample in the bulk property detection process to measure the bursting strength of each paper, observing the relation between the Canadian freeness and the bursting strength of samples with different concentrations, and preparing a table;
and (3) detecting the tearing strength: and taking each paper sample in the bulk property detection process to measure the tear strength of each paper, observing the relation between the Canadian freeness and the tear strength of the samples with different concentrations, and preparing a table.
2. The method for measuring the comprehensive performance of the mao bamboo paper cup according to claim 1, is characterized in that: the fumigation temperature in the bulk property detection is 80-90 ℃.
3. The method for measuring the comprehensive performance of the mao bamboo paper cup according to claim 1, is characterized in that: and cutting the bamboo chips into fixed lengths of 3-5 cm in the bulk property detection.
4. The method for measuring the comprehensive performance of the mao bamboo paper cup according to claim 1, is characterized in that: and in the bulk property detection, caustic soda impregnation is adopted for chemical impregnation.
5. The method for measuring the comprehensive performance of the mao bamboo paper cup according to claim 1, is characterized in that: the dipping temperature in the bulk property detection is 65-80 ℃.
6. The method for measuring the comprehensive performance of the mao bamboo paper cup according to claim 1, is characterized in that: the dipping time in the bulk property detection is 5-7 hours.
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| CN202111026651.4A CN114136260A (en) | 2021-09-02 | 2021-09-02 | Method for measuring comprehensive performance of moso bamboo paper cup |
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| CN202111026651.4A CN114136260A (en) | 2021-09-02 | 2021-09-02 | Method for measuring comprehensive performance of moso bamboo paper cup |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4767499A (en) * | 1981-04-03 | 1988-08-30 | Simonson Rune G W | Method for the production of fiber pulp by impregnating lignocellulosic material with a sulphonating agent prior to refining |
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| CN106835793A (en) * | 2017-03-22 | 2017-06-13 | 四川理工学院 | A kind of preparation method of the true qualities bamboo fibre high water absorption lining paper for amenities production |
| CN109629282A (en) * | 2019-01-11 | 2019-04-16 | 中国林业科学研究院林产化学工业研究所 | A method of matched using corn stalk raw material preparation true qualities wrapping paper plate and plagiarizes slurry |
| CN110607708A (en) * | 2019-09-03 | 2019-12-24 | 中国林业科学研究院林产化学工业研究所 | Method for improving wood chemical-mechanical pulp performance through biological enzyme pretreatment |
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-
2021
- 2021-09-02 CN CN202111026651.4A patent/CN114136260A/en active Pending
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