CN111203946A - Preparation method of anticorrosive recombined bamboo material - Google Patents
Preparation method of anticorrosive recombined bamboo material Download PDFInfo
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- CN111203946A CN111203946A CN202010164602.6A CN202010164602A CN111203946A CN 111203946 A CN111203946 A CN 111203946A CN 202010164602 A CN202010164602 A CN 202010164602A CN 111203946 A CN111203946 A CN 111203946A
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- Prior art keywords
- bamboo
- bundles
- recombined
- anticorrosive
- water
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27J—MECHANICAL WORKING OF CANE, CORK, OR SIMILAR MATERIALS
- B27J1/00—Mechanical working of cane or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D1/00—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring
- B27D1/10—Butting blanks of veneer; Joining same along edges; Preparatory processing of edges, e.g. cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27D—WORKING VENEER OR PLYWOOD
- B27D3/00—Veneer presses; Press plates; Plywood presses
-
- 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/02—Processes; Apparatus
- B27K3/0207—Pretreatment of wood before impregnation
- B27K3/0214—Drying
-
- 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
- B27K3/00—Impregnating wood, e.g. impregnation pretreatment, for example puncturing; Wood impregnation aids not directly involved in the impregnation process
- B27K3/34—Organic impregnating agents
- B27K3/38—Aromatic compounds
-
- 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
- B27K5/0085—Thermal treatments, i.e. involving chemical modification of wood at temperatures well over 100°C
-
- 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
- B27K2240/00—Purpose of the treatment
- B27K2240/20—Removing fungi, molds or insects
Abstract
The invention discloses a preparation method of an anticorrosive recombined bamboo material, which comprises the following steps: (1) cleaning moso bamboo, cutting, removing bamboo green and bamboo yellow, and splitting to obtain bamboo bundles; (2) feeding the bamboo bundles into water for boiling, and heating by high-pressure steam to obtain pretreated bamboo bundles; (3) air-drying the pretreated bamboo bundles by hot air, immersing the bamboo bundles into phenolic resin glue, and paving and assembling along the grain direction; (4) and (3) after the bamboo bundle assembly is finished, conveying the bamboo bundle assembly into a mould, pressurizing and heating the bamboo bundle assembly, and performing thermosetting molding to obtain the bamboo bundle. The preparation method has scientific and accurate parameter control of each step, wherein nutrient components in the moso bamboos which are beneficial to bacterial reproduction can be lost and pyrolyzed in the processes of water boiling and high-pressure steam heating, the energy supply of putrefying bacteria is cut off, the anticorrosion effect is achieved, meanwhile, the density of the recombined bamboos can be increased in the subsequent heat curing process, the putrefying bacteria are difficult to permeate in the radial direction, the anticorrosion performance of the recombined bamboo material is enhanced again, and the obtained product has excellent anticorrosion performance.
Description
Technical Field
The invention belongs to the technical field of forest chemical industry, and particularly relates to a preparation method of an anticorrosive recombined bamboo material.
Background
The recombined bamboo material is a novel bamboo material with high strength, large specification and natural structure, which is formed by untwining bamboo into loose bamboo bundles with certain length, keeping the original arrangement mode of fibers and mutually cross-linked, drying, gluing and hot-pressing along the grain direction assembly.
The bamboo wood is rich in more nutrient substances such as starch, sugar and the like, and is extremely easy to be damaged by microorganisms such as mould and the like, and the traditional mould-proof treatment method mainly treats the bamboo wood by adopting a mould-proof agent, so that the medicament loss phenomenon is easy to generate in the later use process, and further certain harm is caused to the environment; in addition, the existence of starch not only provides a nutrient medium for the growth of the mould, but also hinders the penetration of agents such as a mildew inhibitor to a certain extent, thereby influencing the mildew-proof effect.
Disclosure of Invention
The invention aims to make up for the defects of the prior art and provides a preparation method of an anticorrosive recombined bamboo material.
In order to achieve the above object, the present invention provides the following technical solutions:
a preparation method of an antiseptic recombined bamboo material comprises the following steps:
(1) cleaning moso bamboo, cutting off, sawing, removing bamboo green and bamboo yellow, and splitting to obtain bamboo bundles for later use;
(2) feeding the obtained bamboo bundles into water for boiling, and heating the bamboo bundles by high-pressure steam until the color is changed to obtain pretreated bamboo bundles for later use;
(3) air-drying the pretreated bamboo bundles by hot air until the water content is 8-12%, soaking the bamboo bundles into phenolic resin glue, wherein the gum dipping amount is 10-12% of the absolute dry weight of the bamboo bundles, and then paving and assembling along the grain direction;
(4) and (3) after the bamboo bundle blank is assembled, conveying the bamboo bundle blank into a mould, pressurizing and heating the bamboo bundle blank to perform thermosetting molding, and obtaining the recombined bamboo material.
Further, the diameter at breast height of the moso bamboo used in the step 1 is 75-100mm, and the thickness of the bamboo wall is 5-10 mm.
Further, in the step 1, when the bamboo is split, the bamboo is split into bamboo bundles with the length of 25-35mm and the thickness of 2-6 mm.
Further, the water temperature is controlled to be 100 ℃ during water boiling in the step 2, and the water boiling time is 4-5 hours.
Further, the steam pressure is controlled to be 0.3-0.35MPa when the high-pressure steam is heated in the step 2, and the time is 2-4 hours.
Further, when the air is dried in the step 3, the temperature of the hot air is controlled to be continuously increased to 80 ℃ at the speed of 5-10 ℃/min, and 6-8 hours are taken as a drying period until the required water content is achieved.
Furthermore, the molecular weight of the phenolic resin glue in the step 3 is 5000-10000, and the phenolic resin glue is diluted into 20-30% of solid content by water when in use.
Further, the hot-pressing pressure is controlled to be 2-2.5MPa, the hot-pressing temperature is 130-150 ℃ and the hot-pressing time is 1.5-1.7min/mm during the thermal curing in the step 4.
Further, the density of the obtained recombinant bamboo material is controlled to be 1.1-1.3g/cm3。
The invention has the advantages that:
the preparation method of the anticorrosive recombined bamboo material provided by the invention is obtained by processes of bamboo cutting and sawing, bamboo green and tabasheer removing, splitting, water boiling, high-pressure steam heating, drying, gum dipping, paving and assembling, thermocuring and forming and the like in sequence, parameters of each step are controlled scientifically and accurately, wherein the boiling and high-pressure steam heating process can largely lose and pyrolyze nutrient components such as starch and sugar which are beneficial to the bacterial reproduction in the moso bamboo, thereby cutting off the energy supply of the putrefactive bacteria, destroying the reproduction conditions thereof, achieving the antiseptic effect, meanwhile, the subsequent processes of gum dipping and thermocuring can increase the density of the recombined bamboo, so that colloidal substances and accumulated invaded bodies are deposited in the bamboo bundles, putrefactive bacteria are difficult to permeate from the radial direction, thereby enhancing the corrosion resistance of the recombined bamboo material again, and the obtained product has excellent corrosion resistance and reaches the use standard of the material.
Detailed Description
The technical scheme of the invention is further explained by combining the specific examples as follows:
example 1
A preparation method of an antiseptic recombined bamboo material comprises the following steps:
(1) taking moso bamboo with diameter at breast height of 75-85mm and thickness of bamboo wall of 5-8mm, cleaning, cutting, sawing, removing bamboo green and tabasheer, splitting into bamboo bundles with length of 25mm and thickness of 2 mm;
(2) putting the obtained bamboo bundles into water at 100 ℃ for boiling for 4 hours, heating by high-pressure steam until the color is changed, and controlling the steam pressure to be 0.3MPa and the time to be 4 hours during heating to obtain pretreated bamboo bundles for later use;
(3) air-drying the pretreated bamboo bundles by hot air, controlling the temperature of the hot air to continuously raise the temperature to 80 ℃ at the speed of 5 ℃/min, taking 6 hours as a drying period until the water content is 8%, immersing the bamboo bundles into phenol formaldehyde resin glue with the solid content of 20% and the molecular weight of 5000-10000, wherein the glue dipping amount is 10% of the absolute dry weight of the bamboo bundles, and then paving and assembling along the grain direction;
(4) putting the bamboo bundle assembly blank into a mould to be pressurized and heated for thermosetting molding, wherein the hot pressing pressure is controlled to be 2MPa, the hot pressing temperature is 130 ℃, the hot pressing time is 1.7min/mm, and the density is controlled to be 1.1-1.3g/cm3And obtaining the recombined bamboo material.
Example 2
A preparation method of an antiseptic recombined bamboo material comprises the following steps:
(1) taking moso bamboo with diameter at breast height of 85-100mm and thickness of bamboo wall of 8-10mm, cleaning, cutting, sawing, removing bamboo green and tabasheer, subdividing into bamboo bundles with length of 35mm and thickness of 6 mm;
(2) putting the obtained bamboo bundles into water at 100 ℃ for boiling for 5 hours, heating by high-pressure steam until the color is changed, and controlling the steam pressure to be 0.35MPa and the time to be 2 hours during heating to obtain pretreated bamboo bundles for later use;
(3) air-drying the pretreated bamboo bundles by hot air, controlling the temperature of the hot air to continuously raise the temperature to 80 ℃ at the speed of 10 ℃/min, taking 8 hours as a drying period until the water content is 12%, immersing the bamboo bundles into phenol formaldehyde resin glue with the solid content of 30% and the molecular weight of 5000-10000, wherein the glue dipping amount is 12% of the absolute dry weight of the bamboo bundles, and then paving and assembling along the grain direction;
(4) putting the bamboo bundle assembly blank into a mould to be pressurized and heated for thermosetting molding, wherein the hot pressing pressure is controlled to be 2.5MPa, the hot pressing temperature is 150 ℃, the hot pressing time is 1.5min/mm, and the density is controlled to be 1.1-1.3g/cm3And obtaining the recombined bamboo material.
Example 3
A preparation method of an antiseptic recombined bamboo material comprises the following steps:
(1) taking moso bamboo with diameter at breast height of 85-95mm and thickness of bamboo wall of 6-8mm, cleaning, cutting, sawing, removing bamboo green and tabasheer, subdividing into bamboo bundles with length of 30mm and thickness of 4 mm;
(2) putting the obtained bamboo bundles into water of 100 ℃ for boiling for 4 hours, heating by high-pressure steam until the color is changed, and controlling the steam pressure to be 0.32MPa and the time to be 3 hours during heating to obtain pretreated bamboo bundles for later use;
(3) air-drying the pretreated bamboo bundles by hot air, controlling the temperature of the hot air to continuously raise the temperature to 80 ℃ at the speed of 8 ℃/min, taking 7 hours as a drying period until the water content is 10%, immersing the bamboo bundles into diluted phenolic resin glue with the solid content of 25% and the molecular weight of 5000-10000, wherein the glue dipping amount is 11% of the absolute dry weight of the bamboo bundles, and then paving and assembling along the grain direction;
(4) the bamboo bundles are put into the furnace after being assembledPressurizing and heating in a mold for thermosetting molding, controlling the hot pressing pressure to be 2.3MPa, the hot pressing temperature to be 140 ℃, the hot pressing time to be 1.6min/mm and the density to be 1.1-1.3g/cm3And obtaining the recombined bamboo material.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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 (9)
1. The preparation method of the anticorrosive recombined bamboo material is characterized by comprising the following steps of:
(1) cleaning moso bamboo, cutting off, sawing, removing bamboo green and bamboo yellow, and splitting to obtain bamboo bundles for later use;
(2) feeding the obtained bamboo bundles into water for boiling, and heating the bamboo bundles by high-pressure steam until the color is changed to obtain pretreated bamboo bundles for later use;
(3) air-drying the pretreated bamboo bundles by hot air until the water content is 8-12%, soaking the bamboo bundles into phenolic resin glue, wherein the gum dipping amount is 10-12% of the absolute dry weight of the bamboo bundles, and then paving and assembling along the grain direction;
(4) and (3) after the bamboo bundle blank is assembled, conveying the bamboo bundle blank into a mould, pressurizing and heating the bamboo bundle blank to perform thermosetting molding, and obtaining the recombined bamboo material.
2. The method for preparing anticorrosive recombined bamboo material according to claim 1, wherein the diameter at breast height of the moso bamboo used in step 1 is 75-100mm, and the thickness of the bamboo wall is 5-10 mm.
3. The method for preparing anticorrosive recombined bamboo material according to claim 1, wherein in the step 1, when the bamboo is split, the bamboo is split into bamboo bundles with a length of 25-35mm and a thickness of 2-6 mm.
4. The preparation method of the antiseptic recombined bamboo material as claimed in claim 1, wherein the water temperature is controlled to be 100 ℃ during the water boiling in the step 2, and the water boiling time is 4-5 hours.
5. The preparation method of the anticorrosive recombined bamboo material according to claim 1, wherein the steam pressure is controlled to be 0.3-0.35MPa for 2-4 hours when the high-pressure steam is heated in the step 2.
6. The method for preparing anticorrosive recombined bamboo materials according to claim 1, wherein the temperature of the hot air is controlled to be continuously raised to 80 ℃ at a rate of 5-10 ℃/min during the air drying in the step 3, and a drying period is 6-8 hours until the required water content is reached.
7. The method for preparing the anti-corrosion recombinant bamboo material as claimed in claim 1, wherein the molecular weight of the phenolic resin glue in the step 3 is 5000-10000, and the phenolic resin glue is diluted with water to have a solid content of 20-30% when in use.
8. The method for preparing an antiseptic recombined bamboo material as claimed in claim 1, wherein the hot pressing pressure is controlled to be 2-2.5MPa, the hot pressing temperature is 130-150 ℃, and the hot pressing time is 1.5-1.7min/mm during the thermal curing in the step 4.
9. The method for preparing anticorrosive recombined bamboo material according to claim 1, wherein the density of the recombined bamboo material is controlled to be 1.1-1.3g/cm3。
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010164602.6A CN111203946A (en) | 2020-03-11 | 2020-03-11 | Preparation method of anticorrosive recombined bamboo material |
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| CN202010164602.6A CN111203946A (en) | 2020-03-11 | 2020-03-11 | Preparation method of anticorrosive recombined bamboo material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022228291A1 (en) * | 2021-04-29 | 2022-11-03 | 湖南桃花江竹材科技股份有限公司 | Recombined bamboo board integrating concave-convex wood grain decoration and protection function |
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| JPH10102612A (en) * | 1996-09-30 | 1998-04-21 | Ig Tech Res Inc | Composite heat insulation plate |
| CN101870131A (en) * | 2009-04-27 | 2010-10-27 | 四川省青神县云华竹旅有限公司 | Process for manufacturing bamboo-woven products |
| CN102703993A (en) * | 2011-03-28 | 2012-10-03 | 徐州天虹时代纺织有限公司 | Processing technology of bamboo fiber |
| CN104441107A (en) * | 2014-11-26 | 2015-03-25 | 吕建平 | Single-color bamboo processing process |
| CN106965271A (en) * | 2017-04-17 | 2017-07-21 | 国家林业局竹子研究开发中心 | A kind of outdoor recombination bamboo product and preparation method |
| CN107498676A (en) * | 2017-09-27 | 2017-12-22 | 柳州隆泰竹业有限公司 | A kind of production method of anti-flaming bamboo floor |
| CN108393974A (en) * | 2018-02-01 | 2018-08-14 | 霍山泓浩竹艺有限公司 | A method of improving bamboo product impact resistance |
-
2020
- 2020-03-11 CN CN202010164602.6A patent/CN111203946A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10102612A (en) * | 1996-09-30 | 1998-04-21 | Ig Tech Res Inc | Composite heat insulation plate |
| CN101870131A (en) * | 2009-04-27 | 2010-10-27 | 四川省青神县云华竹旅有限公司 | Process for manufacturing bamboo-woven products |
| CN102703993A (en) * | 2011-03-28 | 2012-10-03 | 徐州天虹时代纺织有限公司 | Processing technology of bamboo fiber |
| CN104441107A (en) * | 2014-11-26 | 2015-03-25 | 吕建平 | Single-color bamboo processing process |
| CN106965271A (en) * | 2017-04-17 | 2017-07-21 | 国家林业局竹子研究开发中心 | A kind of outdoor recombination bamboo product and preparation method |
| CN107498676A (en) * | 2017-09-27 | 2017-12-22 | 柳州隆泰竹业有限公司 | A kind of production method of anti-flaming bamboo floor |
| CN108393974A (en) * | 2018-02-01 | 2018-08-14 | 霍山泓浩竹艺有限公司 | A method of improving bamboo product impact resistance |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022228291A1 (en) * | 2021-04-29 | 2022-11-03 | 湖南桃花江竹材科技股份有限公司 | Recombined bamboo board integrating concave-convex wood grain decoration and protection function |
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Application publication date: 20200529 |
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