CN115556199A - Inorganic straw-solid wood composite board and preparation method thereof - Google Patents
Inorganic straw-solid wood composite board and preparation method thereof Download PDFInfo
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- CN115556199A CN115556199A CN202211285199.8A CN202211285199A CN115556199A CN 115556199 A CN115556199 A CN 115556199A CN 202211285199 A CN202211285199 A CN 202211285199A CN 115556199 A CN115556199 A CN 115556199A
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- inorganic
- straw
- solid wood
- wood composite
- composite board
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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
- B27D1/04—Joining wood veneer with any material; Forming articles thereby; Preparatory processing of surfaces to be joined, e.g. scoring to produce plywood or articles made therefrom; Plywood sheets
- B27D1/08—Manufacture of shaped articles; Presses specially designed therefor
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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
- B27D5/00—Other working of veneer or plywood specially adapted to veneer or plywood
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G11/00—Applying adhesives or glue to surfaces of wood to be joined
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Chemical And Physical Treatments For Wood And The Like (AREA)
- Veneer Processing And Manufacture Of Plywood (AREA)
Abstract
The invention relates to an inorganic straw-solid wood composite board and a preparation method thereof. The preparation method comprises the following steps: uniformly mixing the vinyl resin glue and flour, adding the isocyanate curing agent, continuously stirring and aging to obtain compound glue; roll-coating the compound glue on the surface of a plate, performing cold pressing, and then relieving pressure and standing to obtain a prefabricated plate; and maintaining the prefabricated plates, and obtaining the inorganic straw-solid wood composite plate after the maintenance is finished. According to the preparation method, the aldehyde-free raw materials are adopted for glue compounding, then cold pressing is carried out after glue rolling, and finally the inorganic straw-solid wood composite board is maintained in a health-preserving mode.
Description
Technical Field
The invention belongs to the field of plates, and particularly relates to an inorganic straw-solid wood composite plate and a preparation method thereof.
Background
At present, the compounding process of inorganic plates usually adopts a permeation method, namely, the surface of the inorganic plate is subjected to permeation treatment by an interface agent, then is dried, and finally is subjected to hot-pressing compounding by using resin glue such as urea-formaldehyde glue and the like. However, the method has complex process and low efficiency, and the glue contains formaldehyde and is not resistant to boiling.
Therefore, the technical scheme of the invention is provided.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides an inorganic straw-solid wood composite board and a preparation method thereof. According to the preparation method, the aldehyde-free raw materials are adopted for glue compounding, then cold pressing is carried out after glue rolling, and finally health maintenance is carried out.
The scheme of the invention provides a preparation method of an inorganic straw-solid wood composite board, which comprises the following steps:
(1) Uniformly mixing the vinyl resin glue and flour, adding the isocyanate curing agent, continuously stirring and aging to obtain compound glue;
(2) Roll-coating the compound glue on the surface of a plate, performing cold pressing, and then relieving pressure and standing to obtain a prefabricated plate;
(3) And carrying out health maintenance on the precast slabs to obtain the inorganic straw-solid wood composite board after the completion.
Preferably, in the step (1), the weight ratio of the vinyl resin glue, the flour and the isocyanate curing agent is 110-120.
Preferably, in the step (1), the vinyl resin glue and the flour are uniformly mixed, then the isocyanate curing agent is added, and the mixture is continuously stirred for 5-8 min and aged for 20-25 min to obtain the compound glue. It is emphasized that the isocyanate curing agent is easy to sink, so the isocyanate curing agent is required to be added separately from flour, and the stirring time is not suitable to be too long, otherwise, the glue generates heat and is cured, so the gluing effect is influenced. And after aging, the glue coating is finished within 1 hour, and the effect is optimal.
Preferably, in the step (2), the roll coating amount of the compound glue is 100-200 g/m 2 . In actual operation, a roll coater is often used for coating, the coating amount is controlled by adjusting the pressure of the rubber roll, and finally the coating amount is accurately determined by a weighing method (weighing after coating and before coating is reduced), wherein the weighing is equal to the coating amount.
Preferably, in the step (2), the pressing strength of the cold pressing is 1.0-1.3 MPa, the temperature of the cold pressing is 10-25 ℃, and the time of the cold pressing is 20-40 min. In practice, the pressure is applied within a half hour after the glue has been applied, and the cold pressing process also allows the release of the pressure to continue into the new board, but the pressing must be performed as quickly as possible. In addition, the boards need to be arranged in the cold pressing process, the boards need to be aligned, a hard base plate is added at intervals of 15-20 pieces to prevent uneven pressure, and the parts which can not be pressed can be glued, and if the situation is found, hot pressing (the hot pressing condition is consistent with that of the common plywood) can be carried out for remediation.
Preferably, in the step (2), the standing time is 42-48 h. During the rest period, the application of dynamic pressure and severe vibration to the sheet material is to be avoided.
Preferably, in the step (3), the temperature of the health maintenance is 20-25 ℃, and the time of the health maintenance is 68-72 hours. The lower the temperature is, the longer the curing and maintaining time should be, and the subsequent deep processing or packaging can be carried out after curing.
It should be noted that: the environmental temperature is kept above 10 ℃ during winter production; the isocyanate curing agent should be protected from contact with water and air to avoid failure; the gluing tool should be cleaned in time, and gloves should be worn during gluing to prevent hands from being stuck.
Based on the same technical concept, the invention further provides the inorganic straw-solid wood composite board prepared by the method.
The beneficial effects of the invention are as follows:
according to the preparation method, the formaldehyde-free raw materials are adopted for glue compounding, then the glue is subjected to roll coating and then cold pressing, and finally the inorganic straw-solid wood composite board is maintained in a health-preserving mode.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It should be apparent that the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Example 1
The embodiment provides a preparation method of an inorganic straw-solid wood composite board, which comprises the following steps:
(1) Putting the vinyl resin glue into a stirring barrel, adding flour, uniformly stirring by using a stirrer, adding the isocyanate curing agent, and continuously stirring for 5min, wherein the stirring time is not too long, otherwise, the glue generates heat and is cured, so that the gluing effect is influenced, and aging is carried out for 20min after the completion to obtain compound glue, wherein the compound glue is used within 1 h;
(2) The compound glue is coated on the surface of the plate by a roll coating coater in a roll way, the coating amount is controlled by adjusting the pressure of the glue roller, and the coating amount is determined to be 100g/m by a weighing method 2 Gluing and entering a cold pressing state within half an hour, wherein the pressure of the cold pressing is 1.0MPa, the temperature of the cold pressing is 10 ℃, the time of the cold pressing is 40min, simultaneously, the plates are arranged to be aligned in the process of the cold pressing, a hard base plate is added at intervals of 15 pieces to prevent uneven pressure (glue failure can occur in places with low pressure, and if the situation occurs, hot pressing can be carried out for remediation), and the prefabricated plate is obtained by releasing the pressure and standing for 48h after the cold pressing is finished and avoiding applying dynamic pressure and severe vibration to the plate in the period;
(3) And (3) carrying out maintenance on the prefabricated slab at the temperature of 20 ℃ for 72 hours to obtain the inorganic straw-solid wood composite board.
It is noted that during operation, the curing agent is prevented from contacting water and air for a long time to avoid failure; and the gluing tool is cleaned in time, and gloves are worn during gluing to prevent hands from being stuck.
The amounts of the raw materials used in this example are shown in Table 1.
TABLE 1 amounts of raw materials
| Kind of raw material | Raw material dosage |
| Vinyl resin adhesive | 11kg |
| Flour | 1.5kg |
| Isocyanate curing agent | 1kg |
Example 2
The embodiment provides a preparation method of an inorganic straw-solid wood composite board, which comprises the following steps:
(1) Putting the vinyl resin glue into a stirring barrel, adding flour, uniformly stirring by using a stirrer, adding the isocyanate curing agent, and continuously stirring for 8min, wherein the stirring time is not too long, otherwise, the glue generates heat and is cured, so that the gluing effect is influenced, aging is carried out for 25min after the completion, and the compound glue is obtained and used within 1 h;
(2) The compound glue is coated on the surface of the plate by a roll coating coater, the coating amount is controlled by adjusting the pressure of the glue roller, and the coating amount is determined to be 200g/m by a weighing method 2 Gluing and entering a cold pressing state within half an hour, wherein the pressure of the cold pressing is 1.3MPa, the temperature of the cold pressing is 25 ℃, the time of the cold pressing is 20min, simultaneously, the plates are arranged to be aligned in the process of the cold pressing, a hard base plate is added at intervals of 20 sheets to prevent uneven pressure (glue failure can occur in places with low pressure, and if the situation occurs, hot pressing can be carried out for remedy), and the pressure is relieved and the plates are kept stand for 48h after the cold pressing is finished, so that the plates are prevented from being applied with dynamic pressure and severe vibration in the period of time, and the prefabricated plates are obtained;
(3) And (3) carrying out health maintenance on the precast slab for 68 hours at the temperature of 25 ℃, and obtaining the inorganic straw-solid wood composite board after completion.
It is noted that during operation, the curing agent is prevented from contacting water and air for a long time to avoid failure; and the gluing tool is required to be cleaned in time, and gloves are required to be worn during gluing to prevent hands from being stuck.
The amounts of the raw materials used in this example are shown in Table 2.
TABLE 2 raw material amounts
| Kind of raw material | Raw material dosage |
| Vinyl resin adhesive | 12kg |
| Flour | 2kg |
| Isocyanate curing agent | 1.5kg |
Example 3
The embodiment provides a preparation method of an inorganic straw-solid wood composite board, which comprises the following steps:
(1) Putting the vinyl resin glue into a stirring barrel, adding flour, uniformly stirring by using a stirrer, adding the isocyanate curing agent, and continuously stirring for 6min, wherein the stirring time is not too long, otherwise, the glue generates heat and is cured, so that the gluing effect is influenced, and aging is carried out for 22min after the completion to obtain compound glue, wherein the compound glue is used within 1 h;
(2) The compound glue is coated on the surface of the plate by a roll coating coater in a roll way, the coating amount is controlled by adjusting the pressure of the glue roller, and the coating amount is determined to be 150g/m by a weighing method 2 Gluing and entering a cold pressing state within half an hour, wherein the pressure of the cold pressing is 1.1MPa, the temperature of the cold pressing is 17 ℃, the time of the cold pressing is 30min, simultaneously, the plates are arranged to be aligned in the cold pressing process, 17 rigid base plates are added at intervals to prevent uneven pressure (glue failure can occur in places with insufficient pressure, if the situation occurs, hot pressing can be carried out for remediation), after the cold pressing is finished, pressure is relieved and standing is carried out for 48h, and during the period, dynamic pressure and severe vibration are prevented from being applied to the plates, so that the precast slabs are obtained;
(3) And (3) carrying out curing maintenance on the precast slab for 70 hours at the temperature of 22 ℃ to obtain the inorganic straw-solid wood composite board.
It is noted that during operation, the curing agent is prevented from contacting water and air for a long time to avoid failure; and the gluing tool is cleaned in time, and gloves are worn during gluing to prevent hands from being stuck.
The amounts of the raw materials used in this example are shown in Table 3.
TABLE 3 raw material amounts
| Kind of raw material | Raw material dosage |
| Vinyl resin adhesive | 11.5kg |
| Flour | 1.7kg |
| Isocyanate curing agent | 1.2kg |
In order to detect the formaldehyde emission of the inorganic straw-solid wood composite board, the inorganic straw-solid wood composite board obtained in example 3 was used as an object, 5 boards (the numbers are I, II, III, IV, and V, respectively) were selected for detection, and the detection results are shown in table 4.
TABLE 4 results of formaldehyde emission test
In order to detect the warm water impregnation stripping effect of the inorganic straw-solid wood composite board, the inorganic straw-solid wood composite board obtained in example 3 is taken as an object, 5 boards (with the serial numbers of I, II, III, IV and V respectively) are selected for detection, and the detection results are shown in Table 5.
The detection method comprises the following steps: placing the inorganic straw-solid wood composite board to be detected into a water bath at 70 ℃ for 2 hours, then moving the inorganic straw-solid wood composite board to an oven for drying, and then observing whether the inorganic straw-solid wood composite board has an automatic layering phenomenon or not, wherein if the inorganic straw-solid wood composite board has the automatic layering phenomenon, the inorganic straw-solid wood composite board is unqualified to peel; if not, the peeling is qualified.
TABLE 5 results of peeling by immersion in warm water
| Sample numbering | Peeling condition |
| I | Without automatic stratification |
| II | Without automatic stratification |
| III | Without automatic stratification |
| IV | Without automatic stratification |
| V | Without automatic stratification |
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The preparation method of the inorganic straw-solid wood composite board is characterized by comprising the following steps:
(1) Uniformly mixing the vinyl resin glue and flour, adding the isocyanate curing agent, continuously stirring and aging to obtain compound glue;
(2) Rolling and coating the compound glue on the surface of the plate, performing cold pressing, and then relieving pressure and standing to obtain a precast slab;
(3) And carrying out health maintenance on the precast slabs to obtain the inorganic straw-solid wood composite board after the completion.
2. The preparation method of the inorganic straw-solid wood composite board according to claim 1, wherein in the step (1), the weight ratio of the vinyl resin glue, the flour and the isocyanate curing agent is 110-120.
3. The preparation method of the inorganic straw-solid wood composite board according to claim 1, wherein in the step (1), the vinyl resin glue is uniformly mixed with the flour, and then the isocyanate curing agent is added to continue stirring for 5-8 min and aging for 20-25 min, so as to obtain the compound glue.
4. The preparation method of the inorganic straw-solid wood composite board according to claim 1, wherein in the step (2), the roll coating amount of the compound glue is 100-200 g/m 2 。
5. The preparation method of the inorganic straw-solid wood composite board according to claim 1, wherein in the step (2), the compression strength of the cold pressing is 1.0-1.3 MPa, the temperature of the cold pressing is 10-25 ℃, and the time of the cold pressing is 20-40 min.
6. The method for preparing the inorganic straw-solid wood composite board according to claim 1, wherein in the step (2), the standing time is 42-48 h.
7. The preparation method of the inorganic straw-solid wood composite board according to claim 1, wherein in the step (3), the curing maintenance temperature is 20-25 ℃, and the curing maintenance time is 68-72 hours.
8. The inorganic straw-solid wood composite board obtained by the preparation method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211285199.8A CN115556199A (en) | 2022-10-20 | 2022-10-20 | Inorganic straw-solid wood composite board and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211285199.8A CN115556199A (en) | 2022-10-20 | 2022-10-20 | Inorganic straw-solid wood composite board and preparation method thereof |
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| CN115556199A true CN115556199A (en) | 2023-01-03 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343605A (en) * | 2010-08-06 | 2012-02-08 | 上海昱龄环保科技有限公司 | Production process for formaldehyde-free integrated finger joint laminated board |
| CN102345366A (en) * | 2010-08-06 | 2012-02-08 | 上海昱龄环保科技有限公司 | Production process of formaldehydeless three-layer solid-wood composite floor |
| CN102343602A (en) * | 2010-08-06 | 2012-02-08 | 上海昱龄环保科技有限公司 | Production process of formaldehyde-free laminated wood board |
| CN105058521A (en) * | 2015-07-20 | 2015-11-18 | 南京林业大学 | Formaldehyde-free plank glue splicing technology |
| CN111438785A (en) * | 2020-04-24 | 2020-07-24 | 圣象（江苏）木业研究有限公司 | Preparation process of aldehyde-free multilayer solid wood composite floor |
-
2022
- 2022-10-20 CN CN202211285199.8A patent/CN115556199A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343605A (en) * | 2010-08-06 | 2012-02-08 | 上海昱龄环保科技有限公司 | Production process for formaldehyde-free integrated finger joint laminated board |
| CN102345366A (en) * | 2010-08-06 | 2012-02-08 | 上海昱龄环保科技有限公司 | Production process of formaldehydeless three-layer solid-wood composite floor |
| CN102343602A (en) * | 2010-08-06 | 2012-02-08 | 上海昱龄环保科技有限公司 | Production process of formaldehyde-free laminated wood board |
| CN105058521A (en) * | 2015-07-20 | 2015-11-18 | 南京林业大学 | Formaldehyde-free plank glue splicing technology |
| CN111438785A (en) * | 2020-04-24 | 2020-07-24 | 圣象（江苏）木业研究有限公司 | Preparation process of aldehyde-free multilayer solid wood composite floor |
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