Manufacturing method of flame-retardant ecological board

Abstract

The invention discloses a manufacturing method of a flame-retardant ecological board. The manufacturing method comprises the following steps: adding magnesium chloride hexahydrate, water, a water reducing agent and a retarder into a stirring tank; after the magnesium chloride hexahydrate is completely melted, adding the light calcined magnesia and the water repellent agent, and stirring while adding until the mixture is uniformly dispersed; the prepared magnesium oxychloride inorganic adhesive is adhered to the single plate and the plate core for coating, and the plate core and the single plate are assembled after the adhesive is coated; feeding the assembled blank plate into a cold press for cold pressing and curing, and then entering the next step; the technical wood veneer and the impregnated bond paper are pressed and attached; sanding the cured plate blank according to the thickness requirement, coating the magnesium oxychloride inorganic adhesive again after sanding, and combining the magnesium oxychloride inorganic adhesive with the impregnated bond paper after coating; and the combined plate blank can be detected after being subjected to cold pressing maintenance again. According to the invention, the magnesium oxychloride inorganic adhesive is used for flame retardance, so that the production procedures of dipping, airing and the like are omitted, high temperature can be resisted, combustion can be prevented, and a series of problems caused by a dipping flame-retardant process can be avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of artificial board processing and manufacturing, and particularly relates to a method for manufacturing a flame-retardant ecological board. Background Art

[0002] Traditional flame-retardant ecological boards are generally produced by the impregnation method, which is to dissolve the flame retardant in water, impregnate it into the wood cell cavity under pressure, and put it into use after drying. This makes the veneer easy to damage during the production process, and also causes the mechanical properties of the board to decline; during drying, it may also be affected by the weather, and it cannot be dried on rainy days, delaying production and extending delivery time; in order to ensure continuous production, manufacturers need to prepare and stock up, which takes up additional warehouses; in addition, the area required for drying is also large.

[0003] In order to improve the production process of flame-retardant ecological board and avoid the problems of facilities, equipment, weather, inventory and so on caused by the impregnation process, a flame-retardant ecological board and a manufacturing method thereof are proposed. Summary of the invention

[0004] In order to solve the problem that the existing impregnation production process of flame-retardant ecological boards has high requirements on facilities and inventory, resulting in a long turnover cycle and being unfavorable for production and sales, the present invention provides a method for manufacturing flame-retardant ecological boards, which adopts magnesium oxychloride inorganic adhesive for bonding. Since its composition contains magnesium chloride, it can withstand high temperature and prevent combustion, thereby eliminating a series of problems caused by the impregnation flame retardant process.

[0005] The present invention provides the following technical solution: a method for manufacturing a flame-retardant ecological board, comprising the following steps:

[0006] Step a, adding magnesium chloride hexahydrate, water, a water reducing agent, and a retarder into a stirring tank; stirring and waiting for the magnesium chloride hexahydrate to be completely melted, then adding light-burned magnesium oxide and a water repellent, and stirring while adding until they are evenly dispersed;

[0007] Step b, applying the prepared magnesium oxychloride inorganic adhesive on the veneer and the core, and assembling the core and the veneer after the adhesive application;

[0008] Step c, sending the assembled blanks into a cold press for cold pressing and curing before proceeding to the next step;

[0009] Step d, laminating the technical wood veneer with the impregnated adhesive film paper;

[0010] Step e, sanding the cured slab according to the thickness requirement, coating the slab with magnesium oxychloride inorganic adhesive again after sanding, and combining the slab with the impregnated adhesive film paper in step d after coating;

[0011] Step f, the assembled slab is subjected to cold pressing and curing again and can be tested.

[0012] Preferably, the molar ratio of the components added in step a is as follows: n(MgO):n(MgCl2):n(H2O)=(7-7.5):1:(13-16).

[0013] Preferably, in step a, the water reducing agent is polycarboxylic acid, the retarder is citric acid, and the water repellent is phosphoric acid, and the addition amounts thereof are 0.5%, 0.2%, and 7.0% of the active magnesium oxide content in the light-burned magnesium oxide, respectively.

[0014] Preferably, the single-sided coating amount in step b is 350 g / m 2 .

[0015] Preferably, the cold pressing process in step c is as follows: unit pressure 1.0 MPa, time 12 h; curing time is 7 days.

[0016] Preferably, the coating amount in step e is 300 g / m 2 .

[0017] Preferably, the cold pressing process in step f is as follows: unit pressure 1.0 MPa, time 12 h; curing time is 15 days

[0018] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0019] First, the method of the present invention uses magnesium oxychloride inorganic adhesive for flame retardancy, eliminating production processes such as dipping and drying, and effectively avoiding the problems of reduced mechanical strength caused by dipping flame retardancy, high requirements for production facilities and equipment, and great influence by weather.

[0020] Second, the flame-retardant ecological board prepared by the method of the present invention can be used for interior decoration of various high-rise buildings, hotels, hospitals, schools, large supermarkets, etc., and has good development prospects. DETAILED DESCRIPTION

[0021] The present invention will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] A method for manufacturing a flame retardant ecological board comprises the following steps:

[0024] (1) Weigh magnesium oxide, water, and magnesium chloride hexahydrate in a molar ratio of n(MgO):n(MgCl2):n(H2O)=7:1:15.

[0025] (2) After weighing, add magnesium chloride hexahydrate, water, polycarboxylic acid, and citric acid to the mixing tank. Stir and wait for the magnesium chloride hexahydrate to completely melt, then add lightly calcined magnesium oxide and phosphoric acid, and stir while adding until they are evenly dispersed. The addition amounts are 0.5%, 0.2%, and 7.0% of the active magnesium oxide content, respectively.

[0026] (3) Apply the prepared magnesium oxychloride inorganic adhesive on the veneer and the core, with a single-side coating amount of 350g / m 2 After gluing, the core board and the veneer are assembled.

[0027] (4) The assembled blanks are sent to a cold press for cold pressing. The cold pressing process is as follows: unit pressure 1.0 MPa, time 12 h, and curing for 7 days before proceeding to the next step.

[0028] (5) Press the technical wood veneer and the impregnated adhesive film paper together.

[0029] (6) The cured slab is sanded according to the thickness requirements, and then coated with magnesium oxychloride inorganic adhesive again after sanding, with a coating amount of 300g / m 2 。 After coating, combine with impregnated film paper.

[0030] (7) The assembled slab is cold pressed again, and the cold pressing process is: unit pressure 1.0 MPa, time 12 h, and the test can be carried out after curing for 15 days.

[0031] Example 2

[0032] A method for manufacturing a flame retardant ecological board comprises the following steps:

[0033] (1) Weigh magnesium oxide, water, and magnesium chloride hexahydrate in a molar ratio of n(MgO):n(MgCl2):n(H2O)=7.5:1:16.

[0034] (2) After weighing, add magnesium chloride hexahydrate, water, polycarboxylic acid, and citric acid to the mixing tank. Stir and wait for the magnesium chloride hexahydrate to completely melt, then add lightly calcined magnesium oxide and phosphoric acid, and stir while adding until they are evenly dispersed. The addition amounts are 0.5%, 0.2%, and 7.0% of the active magnesium oxide content, respectively.

[0035] (3) Apply the prepared magnesium oxychloride inorganic adhesive on the veneer and the core, with a single-side coating amount of 350g / m 2 After gluing, the core board and the veneer are assembled.

[0036] (4) The assembled blanks are sent to a cold press for cold pressing. The cold pressing process is as follows: unit pressure 1.0 MPa, time 12 h, and curing for 7 days before proceeding to the next step.

[0037] (5) Press the technical wood veneer and the impregnated adhesive film paper together.

[0038] (6) The cured slab is sanded according to the thickness requirements, and then coated with magnesium oxychloride inorganic adhesive again after sanding, with a coating amount of 300g / m 2 。 After coating, combine with impregnated film paper.

[0039] (7) The assembled slab is cold pressed again, and the cold pressing process is: unit pressure 1.0 MPa, time 12 h, and the test can be carried out after curing for 15 days.

[0040] Example 3

[0041] A method for manufacturing a flame retardant ecological board comprises the following steps:

[0042] (1) Weigh magnesium oxide, water, and magnesium chloride hexahydrate in a molar ratio of n(MgO):n(MgCl2):n(H2O)=7:1:13.

[0043] (2) After weighing, add magnesium chloride hexahydrate, water, polycarboxylic acid, and citric acid to the mixing tank. Stir and wait for the magnesium chloride hexahydrate to completely melt, then add lightly calcined magnesium oxide and phosphoric acid, and stir while adding until they are evenly dispersed. The addition amounts are 0.5%, 0.2%, and 7.0% of the active magnesium oxide content, respectively.

[0044] (3) Apply the prepared magnesium oxychloride inorganic adhesive on the veneer and the core, with a single-side coating amount of 350g / m 2 After gluing, the core board and the veneer are assembled.

[0045] (4) The assembled blanks are sent to a cold press for cold pressing. The cold pressing process is as follows: unit pressure 1.0 MPa, time 12 h, and curing for 7 days before proceeding to the next step.

[0046] (5) Press the technical wood veneer and the impregnated adhesive film paper together.

[0047] (6) The cured slab is sanded according to the thickness requirements, and then coated with magnesium oxychloride inorganic adhesive again after sanding, with a coating amount of 300g / m 2 。 After coating, combine with impregnated film paper.

[0048] (7) The assembled slab is cold pressed again, and the cold pressing process is: unit pressure 1.0 MPa, time 12 h, and the test can be carried out after curing for 15 days.

[0049] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations may be made to the embodiments without departing from the principles and spirit thereof, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for manufacturing a flame-retardant ecological board, characterized in that: The following steps are involved: Step a, adding magnesium chloride hexahydrate, water, a water reducing agent, and a retarder into a stirring tank; stirring and waiting for the magnesium chloride hexahydrate to be completely melted, then adding light-burned magnesium oxide and a water repellent, and stirring while adding until they are evenly dispersed; Step b, applying the prepared magnesium oxychloride inorganic adhesive on the veneer and the core, and assembling the core and the veneer after the adhesive application; Step c, sending the assembled blanks into a cold press for cold pressing and curing before proceeding to the next step; Step d, laminating the technical wood veneer with the impregnated adhesive film paper; Step e, sanding the cured slab according to the thickness requirement, coating the slab with magnesium oxychloride inorganic adhesive again after sanding, and combining the slab with the impregnated adhesive film paper in step d after coating; Step f, the assembled slab is subjected to cold pressing and curing again and can be tested.

2. The method for manufacturing a flame retardant ecological board according to claim 1, characterized in that: The molar ratio of the components added in step a is as follows: n(MgO):n(MgCl2):n(H2O)=(7-7.5):1:(13-16).

3. The method for manufacturing a flame retardant ecological board according to claim 1, characterized in that: In step a, the water reducing agent is polycarboxylic acid, the retarder is citric acid, and the water repellent is phosphoric acid, and the addition amounts thereof are 0.5%, 0.2%, and 7.0% of the active magnesium oxide content in the light-burned magnesium oxide, respectively.

4. The method for manufacturing a flame retardant ecological board according to claim 1, characterized in that: The single-sided coating amount in step b is 350 g / m 2 .

5. The method for manufacturing a flame retardant ecological board according to claim 1, characterized in that: The cold pressing process in step c is as follows: unit pressure 1.0 MPa, time 12 h; curing time is 7 days.

6. The method for manufacturing a flame retardant ecological board according to claim 1, characterized in that: The coating amount in step e is 300g / m 2 .

7. The method for manufacturing a flame retardant ecological board according to claim 1, characterized in that: The cold pressing process in step f is as follows: unit pressure 1.0 MPa, time 12 h; curing time is 15 days.