CN110962205A - Cotton stalk-based density fiberboard production process, density fiberboard and packing box - Google Patents
Cotton stalk-based density fiberboard production process, density fiberboard and packing box Download PDFInfo
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- CN110962205A CN110962205A CN201811160977.4A CN201811160977A CN110962205A CN 110962205 A CN110962205 A CN 110962205A CN 201811160977 A CN201811160977 A CN 201811160977A CN 110962205 A CN110962205 A CN 110962205A
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- production process
- density fiberboard
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N1/00—Pretreatment of moulding material
- B27N1/02—Mixing the material with binding agent
- B27N1/0209—Methods, e.g. characterised by the composition of the agent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27K—PROCESSES, APPARATUS OR SELECTION OF SUBSTANCES FOR IMPREGNATING, STAINING, DYEING, BLEACHING OF WOOD OR SIMILAR MATERIALS, OR TREATING OF WOOD OR SIMILAR MATERIALS WITH PERMEANT LIQUIDS, NOT OTHERWISE PROVIDED FOR; CHEMICAL OR PHYSICAL TREATMENT OF CORK, CANE, REED, STRAW OR SIMILAR MATERIALS
- B27K5/00—Treating of wood not provided for in groups B27K1/00, B27K3/00
- B27K5/001—Heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/08—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood fibres, e.g. produced by tearing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/10—Moulding of mats
- B27N3/14—Distributing or orienting the particles or fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
- B27N3/00—Manufacture of substantially flat articles, e.g. boards, from particles or fibres
- B27N3/08—Moulding or pressing
- B27N3/18—Auxiliary operations, e.g. preheating, humidifying, cutting-off
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a production process of a density fiberboard based on cotton stalks, which comprises the steps of cutting, screening, cooking, hot grinding, gluing, drying, paving, forming, hot pressing and the like, and in order to avoid the cotton stalks from being coarsely crushed before the hot grinding, the invention adopts the cutting process, so that the morphological structure of the cotton stalk monomer fibers is reserved to the maximum extent, the strength of the board can be greatly improved, the utilization rate of the cotton stalk material is improved, and the production cost is reduced. The invention also discloses a density fiberboard based on cotton stalks, which is prepared by the production process of the invention and has the advantages of reliable quality and the like. The invention also discloses a packing box which is made of the density fiberboard and has the advantages of environmental protection, practicability, excellent performance and the like.
Description
Technical Field
The invention belongs to the field of plate manufacturing and processing, and particularly relates to a production process of a density fiberboard based on cotton stalks, the density fiberboard and a packing box.
Background
At present, no fiberboard product taking cotton stalks as main raw materials exists in the market, the cotton stalks are mostly taken as auxiliary materials, and other wood raw material fibers are added to produce a density fiberboard product. The main reasons for the difficulty of using cotton stalks as the main raw material for the production of fibreboards are: (1) although the chemical components of the cotton stalk are similar to those of the hardwood, the cotton stalk is irregular in shape and basically smaller than 80mm in diameter, the fiber of the cotton stalk is subjected to subsequent treatment after being coarsely crushed in the prior art, and the cotton stalk monomer fiber is damaged more in the treatment mode, so that better cotton stalk monomer fiber cannot be thermally ground, and the mechanical strength of the prepared board is poor; (2) the content of saccharide-like substances in the cotton stalks is much higher than that of the wood raw materials, and the board made of the cotton stalks has poor water resistance and mildew resistance. Therefore, a large amount of cotton stalk fiber cannot be fully used, which causes waste.
Chinese patent CN104441193 discloses a method for synthesizing a cotton stalk density board, which is used for manufacturing a cotton stalk fiber density board, wherein cotton stalks are thoroughly crushed and then screened, glued and hot-pressed, and a secondary pressing production process is adopted to avoid the problem of low mechanical strength of the cotton stalk density board; in addition, the problem that the water resistance and the mildew resistance of the cotton stalk fiber density board are poor is not solved.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects in the prior art and provides a cotton stalk-based density fiberboard production process, a density fiberboard and a packing box, wherein the cotton stalk is used as a raw material, and the density fiberboard production process is high in product strength and reliable in quality.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a production process of a density fiberboard based on cotton stalks comprises the following steps,
s1, cutting: cutting and dividing the cotton stalks into sections with uniform length and size, and ensuring the fracture of the sections to be smooth;
s2, screening: screening the cut cotton stalk section material to screen oversize material, powder material and impurities, wherein the oversize material is the section material with the average length size larger than that in S1;
s3, cooking and hot grinding: steaming and boiling the screened cotton stalk section material and carrying out hot grinding treatment;
s4, sizing: fully sizing the hot-milled fibers;
s5, drying: drying the fiber after sizing;
s6, paving, forming and hot pressing: and paving and forming the dried fiber and carrying out hot pressing.
In order to avoid the cotton stalk monomer fiber from being coarsely crushed before the hot grinding, the invention adopts the cutting process, so that the morphological structure of the cotton stalk monomer fiber is reserved to the greatest extent, the strength of the board can be greatly improved, the utilization rate of the cotton stalk material is improved, and the production cost is reduced.
In the production process of the density fiberboard based on cotton stalks, preferably, the cotton stalks are cut and segmented into cylindrical sections with the length of 15-80 mm in S1.
In the production process of the density fiberboard based on the cotton stalks, preferably, the cooking pressure in the S3 is 0.4-1.5 MPa, the cooking time is 1-10 min, and the cooking temperature is 150-230 ℃.
In the production process of the density fiberboard based on cotton stalks, preferably, the water-proofing agent and the compound additive are sequentially sprayed in the S3 in the hot grinding process, and the compound additive is an aqueous solution of inorganic sulfate and cationic polyacrylamide. By the positive charges generated by the hydrolysis of inorganic sulfate and cationic polyacrylamide in the composite additive and the synergistic effect of inorganic ions and chemical bond ions, the composite additive and the negatively charged waterproofing agent are fully adsorbed to each other, a firm covering layer is formed on the surface of the cotton stalk fiber, and the water resistance of the board is greatly improved; in addition, the cationic polyacrylamide can also form strong chemical bonding with fiber molecules, so that the mechanical property of the plate is further improved.
According to the production process of the density fiberboard based on the cotton stalks, the waterproof agent and the composite additive are preferably sprayed in sequence in an ultrasonic atomization spraying mode, so that the waterproof agent and the composite additive are well and fully combined with the fibers.
In the production process of the density fiberboard based on the cotton stalks, preferably, the waterproof agent is one or more of paraffin, rosin, vegetable oil and asphalt, and the composite additive is an aqueous solution of aluminum sulfate, copper sulfate and cationic polyacrylamide. The addition of copper sulfate can effectively improve the mildew resistance of the board.
In the production process of the density fiberboard based on cotton stalks, preferably, the sizing is performed by adopting amino resin in S4, the addition amount of the amino resin is 8-12%, and the addition amount is the ratio of the solid content of the amino resin to the absolutely dry fiber.
In the production process of the density fiberboard based on cotton stalks, preferably, the S4 is sized by using PMDI type resin, the addition amount of the PMDI type resin is 3-8%, the addition amount is the ratio of the solid content of the PMDI type resin to the absolute dry fiber, and the PMDI type resin is isocyanate type resin.
In the production process of the density fiberboard based on cotton stalks, preferably, the moisture content of the dried fibers is controlled to be 8-12% in S5, the hot pressing temperature is 150-230 ℃ in S6, and the hot pressing pressure is 1.0-5.5 MPa.
As a general technical concept, the invention also provides a density fiberboard based on cotton stalks, which is prepared by adopting the production process of the density fiberboard based on cotton stalks.
As a general technical concept, the invention also provides a packing box which is manufactured by adopting the density fiberboard based on the cotton stalks.
Compared with the prior art, the invention has the advantages that:
1. the invention abandons the crushing and hot grinding process adopted in the prior cotton stalk fiber board manufacturing process, and adopts the cutting and hot grinding process to manufacture the cotton stalk fiber, so that the morphological structure of the cotton stalk monomer fiber is retained to the maximum extent, the strength of the board can be greatly improved, the material utilization rate is improved, and the production cost is reduced.
2. The density fiberboard based on cotton stalks has reliable quality, the performance meets the performance requirement of a pure wood fiberboard, the cotton stalk resource is more effectively utilized, the solid waste reutilization of crops is realized, and the density fiberboard has important economic value and social value.
Drawings
FIG. 1 is a flow chart of a cotton stalk based density fiberboard production process in an example.
Detailed Description
In order to facilitate understanding of the invention, the invention will be described more fully and in detail with reference to the accompanying drawings and preferred embodiments, but the scope of the invention is not limited to the specific embodiments below.
Example 1:
as shown in fig. 1, the present example, which uses a cotton stalk-based density fiberboard production process to produce and prepare a density fiberboard, includes the following steps,
s1, cutting: cutting and dividing the cotton stalks into sections with uniform length and size, and ensuring the fracture of the sections to be smooth;
s2, screening: screening the cut cotton stalk section material to screen out powder material, impurities and oversize material with the average length size larger than that in S1;
s3, cooking and hot grinding: the screened cotton stalk section material is subjected to cooking and hot grinding treatment, the cooking pressure is 0.6MPa, the cooking time is 3min, the cooking temperature is 220 ℃, and in the hot grinding process, a waterproof agent and a composite additive are sprayed in sequence by adopting ultrasonic atomization, wherein the waterproof agent is paraffin and rosin, and the composite additive is an aqueous solution of aluminum sulfate, copper sulfate and cationic polyacrylamide;
s4, sizing: fully sizing the hot-milled fibers, and sizing by adopting amino resin, wherein the addition amount of the amino resin is 10 percent, and the addition amount is the ratio of the solid content of the amino resin to the absolutely dry fibers;
s5, drying: drying the fiber after sizing, and controlling the water content of the fiber to be 9%;
s6, paving, forming and hot pressing: and paving, molding and hot-pressing the dried fiber, wherein the hot-pressing temperature is 220 ℃, and the hot-pressing pressure is 1.8 MPa.
And then, carrying out subsequent treatment on the hot-pressed board, finally preparing a batch of density fiberboards based on cotton stalks, and detecting the performance indexes as shown in the following table 1.
Table 1 table for testing the properties of the cotton stalk based density fiberboard of example 1
As can be seen from table 1, the performance of the cotton stalk based density fiberboard of the present example meets the performance requirements of a pure wood fiberboard.
The packing box made of the density fiberboard of the embodiment has the advantages of reliable quality, good performance, accordance with the packing requirement, effective utilization of cotton stalk resources and low production cost.
Example 2:
as shown in fig. 1, the present example, which uses a cotton stalk-based density fiberboard production process to produce and prepare a density fiberboard, includes the following steps,
s1, cutting: cutting and dividing the cotton stalks into cylindrical sections with the length of 15-80 mm, and ensuring the fracture of the sections to be smooth;
s2, screening: screening the cut cotton stalk section material to screen oversize material, powder and impurities, wherein the oversize material is a section material with the length of more than 15-80 mm;
s3, cooking and hot grinding: the screened cotton stalk section material is subjected to cooking and hot grinding treatment, the cooking pressure is 1.2MPa, the cooking time is 8min, the cooking temperature is 170 ℃, and in the hot grinding process, a water-proofing agent and a composite additive are sprayed in sequence by adopting ultrasonic atomization, wherein the water-proofing agent is vegetable oil and asphalt, and the composite additive is an aqueous solution of aluminum sulfate, copper sulfate and cationic polyacrylamide;
s4, sizing: fully sizing the hot-milled fibers, and sizing by adopting a PMDI type resin, wherein the addition amount of the PMDI type resin is 5 percent, and the addition amount is the ratio of the solid content of the PMDI type resin to absolutely dry fibers;
s5, drying: drying the fiber after sizing, and controlling the water content of the fiber to be 11%;
s6, paving, forming and hot pressing: and paving, molding and hot-pressing the dried fiber, wherein the hot-pressing temperature is 170 ℃, and the hot-pressing pressure is 5.0 MPa.
And then, carrying out subsequent treatment on the hot-pressed board, finally preparing a batch of density fiberboards based on cotton stalks, and detecting the performance indexes as shown in the following table 2.
Table 2 table for testing the properties of the cotton stalk based density fiberboard of example 2
| Performance index | Unit of | Standard value | The result of the detection |
| Thickness of | mm | 6.8 | |
| Density of | g/cm3 | 0.742 | |
| Static bending strength | MPa | 25 | 31.841 |
| Modulus of elasticity | MPa | 2500 | 3189.638 |
| 24h water absorption expansion rate | ％ | 20 | 6.04％ |
| Internal bond strength | MPa | 0.60 | 1.269 |
As can be seen from table 2, the performance of the cotton stalk based density fiberboard of this example meets the performance requirements of a pure wood fiberboard.
The packing box made of the density fiberboard of the embodiment has the advantages of reliable quality, good performance, accordance with the packing requirement, effective utilization of cotton stalk resources and low production cost.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.
Claims (10)
1. A production process of a density fiberboard based on cotton stalks is characterized by comprising the following steps: comprises the following steps of (a) carrying out,
s1, cutting: cutting and dividing the cotton stalks into sections with uniform length and size, and ensuring the fracture of the sections to be smooth;
s2, screening: screening the cut cotton stalk section material to screen oversize material, powder and impurities;
s3, cooking and hot grinding: steaming and boiling the screened cotton stalk section material and carrying out hot grinding treatment;
s4, sizing: fully sizing the hot-milled fibers;
s5, drying: drying the fiber after sizing;
s6, paving, forming and hot pressing: and paving and forming the dried fiber and carrying out hot pressing.
2. The production process according to claim 1, characterized in that: and in the S1, the cotton stalks are cut and segmented into cylindrical sections with the length of 15-80 mm.
3. The production process according to claim 1, characterized in that: in the S3, the cooking pressure is 0.4-1.5 MPa, the cooking time is 1-10 min, and the cooking temperature is 150-230 ℃.
4. The production process according to any one of claims 1 to 3, characterized in that: and S3, sequentially spraying a waterproof agent and a composite additive in the hot grinding process, wherein the composite additive is an aqueous solution of inorganic sulfate and cationic polyacrylamide.
5. The production process according to claim 4, characterized in that: the waterproof agent is one or more of paraffin, rosin, vegetable oil and asphalt, and the composite additive is an aqueous solution of aluminum sulfate, copper sulfate and cationic polyacrylamide.
6. The production process according to any one of claims 1 to 3, characterized in that: and in the S4, sizing is performed by adopting amino resin, wherein the addition amount of the amino resin is 8-12%, and the addition amount is the ratio of the solid content of the amino resin to the absolutely dry fiber.
7. The production process according to any one of claims 1 to 3, characterized in that: and the S4 is sized by adopting a PMDI type resin, the addition amount of the PMDI type resin is 3-8%, and the addition amount is the ratio of the solid content of the PMDI type resin to the absolute dry fiber.
8. The production process according to any one of claims 1 to 3, characterized in that: and in the S5, the moisture content of the dried fiber is controlled to be 8-12%, the hot pressing temperature in the S6 is 150-230 ℃, and the hot pressing pressure is 1.0-5.5 MPa.
9. A density fiberboard based on cotton stalks, which is characterized in that: is prepared by the cotton stalk based density fiberboard production process according to any one of the claims 1 to 8.
10. A packing box is characterized in that: is made using the cotton stalk based density fiberboard of claim 9.
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| CN201811160977.4A CN110962205A (en) | 2018-09-30 | 2018-09-30 | Cotton stalk-based density fiberboard production process, density fiberboard and packing box |
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| CN201811160977.4A CN110962205A (en) | 2018-09-30 | 2018-09-30 | Cotton stalk-based density fiberboard production process, density fiberboard and packing box |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279196A (en) * | 1999-07-02 | 2001-01-10 | 于杰 | Packaging case made of plant fibre board and its making technology |
| CN1473690A (en) * | 2003-08-11 | 2004-02-11 | 余松宝 | Dry method for preparing cotton stalk fibrous board |
| CN101209568A (en) * | 2006-12-29 | 2008-07-02 | 卢洪英 | Light fiberboard and preparation thereof |
| CN101654884A (en) * | 2009-08-27 | 2010-02-24 | 金东纸业（江苏）股份有限公司 | Method for realizing mid-consistency grinding in low-consistency device |
| CN103878859A (en) * | 2014-03-05 | 2014-06-25 | 东营正和木业有限公司 | Method for preparing highly-damp-proof thin type medium density fiberboard |
-
2018
- 2018-09-30 CN CN201811160977.4A patent/CN110962205A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279196A (en) * | 1999-07-02 | 2001-01-10 | 于杰 | Packaging case made of plant fibre board and its making technology |
| CN1473690A (en) * | 2003-08-11 | 2004-02-11 | 余松宝 | Dry method for preparing cotton stalk fibrous board |
| CN101209568A (en) * | 2006-12-29 | 2008-07-02 | 卢洪英 | Light fiberboard and preparation thereof |
| CN101654884A (en) * | 2009-08-27 | 2010-02-24 | 金东纸业（江苏）股份有限公司 | Method for realizing mid-consistency grinding in low-consistency device |
| CN103878859A (en) * | 2014-03-05 | 2014-06-25 | 东营正和木业有限公司 | Method for preparing highly-damp-proof thin type medium density fiberboard |
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