Manufacturing method of A-grade fireproof impregnated paper laminated calcium silicate board

Abstract

The invention belongs to the technical field of building materials, and relates to a manufacturing method of an A-grade fireproof impregnated paper laminated calcium silicate board, which comprises the following steps: firstly, the upper surface and the lower surface of a calcium silicate board are coated with 50-150g / m < 2 > glue, and the thickness of the calcium silicate board is 5-20mm; the upper surface and the lower surface of the glued calcium silicate board are each provided with an ultra-thin fiber board, the ultra-thin fiber boards are assembled and then subjected to hot pressing curing, the thickness of each ultra-thin fiber board is 1-3 mm, and the density of each ultra-thin fiber board is 850-1000 kg / m < 3 >; after hot-pressing curing is completed, the plate is discharged, cooled and stacked, and curing is conducted for 3-5 d at the room temperature; and paving flame-retardant decorative impregnated bond paper on the upper surface of the cured plate, paving flame-retardant balanced impregnated bond paper on the lower surface of the cured plate, performing hot press molding again, cooling and stacking. According to the invention, the flame retardant is added into the glue used for secondary impregnation, so that the surface of the finished board has excellent high temperature resistance and firing resistance; and the calcium silicate board base material is a green and environment-friendly building material, has the advantages of moisture resistance, fire resistance, durability, low price and the like, has lower formaldehyde emission, and meets the concept of healthy home furnishing in the current society.

Description

Technical Field

[0001] The invention belongs to the technical field of building materials, relates to artificial boards, and in particular to a method for manufacturing a grade A fireproof impregnated paper laminated calcium silicate board. Background Art

[0002] With the improvement of fire safety awareness in the whole society, consumers have put forward higher fire retardant requirements for some building decoration products, such as flooring, wall panels, doors, windows and cabinets, etc., but traditional building materials, such as wooden materials and plastics, are mostly flammable. According to GB 8624-2012 "Classification of Combustion Performance of Building Materials and Products", the basic classification of the combustion performance of building materials and products in my country is divided into five levels: A1, A2, B1, B2, B3, and the flame retardant level of wooden floors that have not been flame retardant can only reach B2 (combustible). According to GB 50222-2017 "Fire Protection Code for Interior Decoration Design of Buildings", the flame retardant level of flooring materials in public buildings and ordinary residential buildings should reach B1 (difficult to burn). For special places such as auditoriums, conference halls, multi-functional halls, waiting halls, commercial business halls, places for storing cultural relics, memorial exhibition items, important books, archives, and materials, the combustion performance level of floor decoration materials must be A.

[0003] Calcium silicate board is a new type of green and environmentally friendly building material. It is made of organic and inorganic materials such as wood fiber, silicon and calcium materials through molding, pressurization, high temperature and high pressure steaming and other processes. It has the advantages of long service life, safety and environmental protection, fire resistance, moisture resistance and excellent sound insulation performance. It is currently widely used in the interior and exterior walls of various buildings, ceilings and partitions of industrial and commercial engineering buildings, home decoration, furniture linings, billboard linings, warehouse sheds, network floors and wall panels of indoor projects such as tunnels. As a floor finishing material, impregnated film paper has the characteristics of low price, good wear resistance and customizable patterns.

[0004] If the calcium silicate board can be bonded with the impregnated adhesive film paper, a composite board with beautiful appearance, fire retardant, low formaldehyde and sound insulation properties can be produced. Summary of the invention

[0005] Based on the above background technology, the object of the present invention is to provide a method for manufacturing a Class A fireproof impregnated paper laminated calcium silicate board.

[0006] Technical Solution

[0007] A method for manufacturing a Class A fireproof impregnated paper laminated calcium silicate board, comprising the following steps:

[0008] (1) 50-150g / m2 is applied on both the upper and lower surfaces of the calcium silicate board 2The calcium silicate board has a thickness of 5 to 20 mm, and the glue is a mixture of unsaturated polyester resin and cellulose cotton in a mass ratio of 10:1 to 10:3;

[0009] (2) Place an ultra-thin fiberboard on the upper and lower surfaces of the glue-coated calcium silicate board, and heat-press and solidify it after assembly. The ultra-thin fiberboard has a thickness of 1 to 3 mm and a density of 850 to 1000 kg / m 3 ; Hot pressing curing treatment time 1 to 3 minutes, temperature 130 to 150 ° C, pressure 2 to 4 MPa;

[0010] (3) After hot pressing and curing, the boards are taken out, cooled and stacked, and cured at room temperature for 3 to 5 days;

[0011] (4) After curing, the upper surface of the board is paved with flame-retardant decorative impregnated film paper, and the lower surface is paved with flame-retardant balance impregnated film paper, which is then hot-pressed again and cooled and stacked.

[0012] According to a preferred disclosed example of the present invention, in step (1), the calcium silicate board comprises, by mass percentage, 30-60% of siliceous material, 20-40% of calcareous material, and 20-30% of reinforcing fiber, and has a thickness of 12 mm.

[0013] In a preferred embodiment of the present invention, in step (1), the glue is a mixture of unsaturated polyester resin and cellulose cotton in a mass ratio of 10:2, and the coating amount is 100g / m 2 .

[0014] In a preferred embodiment of the present invention, in step (2), the ultra-thin fiberboard has a thickness of 2 mm and a density of 900 kg / m 3 .

[0015] According to a preferred embodiment of the present invention, in step (2), the hot pressing curing treatment time is 2 minutes, the temperature is 140° C., and the pressure is 3 MPa.

[0016] According to a preferred embodiment of the present invention, in step (3), the curing is performed at room temperature for 4 days.

[0017] In a preferred embodiment of the present invention, in step (4), the flame retardant decorative impregnated adhesive film paper is adhesive paper to which 0.5-1% flame retardant is added, and the adhesive amount is 150-160 g / m 2 , and aluminum oxide is sprayed on the surface to improve the surface wear resistance.

[0018] In a preferred embodiment of the present invention, in step (4), the flame retardant balanced impregnated adhesive film paper is an adhesive film to which 0.5% to 1% flame retardant is added, and the adhesive amount is 140 to 150 g / m 2 .

[0019] In a preferred embodiment of the present invention, in step (4), the secondary hot pressing has a hot pressing temperature of 180-190° C., a hot pressing time of 30-40 seconds, and a hot pressing pressure of 4-5 MPa.

[0020] The Class A fireproof impregnated paper laminated calcium silicate board prepared by the method disclosed in the present invention comprises, from top to bottom, decorative impregnated adhesive film paper, ultra-thin fiberboard (A), calcium silicate board substrate layer, ultra-thin density board (B) and balanced impregnated adhesive film paper, and each layer is bonded with glue.

[0021] Beneficial Effects

[0022] The impregnated film paper used in the present invention is different from the traditional laminate floor surface film paper. 0.5-1% of flame retardant is added to the glue used for secondary impregnation, so that the surface of the finished floor has excellent high temperature resistance and burning resistance. Compared with solid wood veneer materials, the impregnated film paper has more advantages in fire resistance, flame retardancy and other properties, and the price is generally more affordable. At the same time, the surface decorative film paper can provide a variety of colors, patterns and textures to meet the needs of different decoration styles and customer preferences. At the same time, ultra-thin fiberboard is used as the middle layer material, which can not only cover the surface defects of the calcium silicate board and improve the surface flatness of the finished floor, but also improve the overall structural stability of the floor. The calcium silicate board substrate is a green and environmentally friendly building material with the advantages of moisture resistance, fire resistance, durability, and low price. Compared with traditional wooden boards, its formaldehyde emission is lower, which meets the concept of healthy home in today's society. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 .Schematic diagram of the structure of Class A fireproof impregnated paper laminated calcium silicate board, including: 1. Decorative impregnated film paper, 2. Ultra-thin fiberboard (A), 3. Calcium silicate board substrate layer, 4. Ultra-thin fiberboard (B), 5. Balanced impregnated film paper. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the embodiments so that those skilled in the art can better understand the present invention, but the present invention is not limited to the following embodiments.

[0025] Example 1

[0026] A method for manufacturing a Class A fireproof impregnated paper laminated calcium silicate board, comprising the following steps:

[0027] (1) First, apply 100g / m2 of calcium silicate on the upper and lower surfaces. 2 The calcium silicate board comprises, by mass percentage, 40% of siliceous material, 35% of calcium material, and 25% of reinforcing fiber, and has a thickness of 8 mm; the glue is an adhesive prepared by mixing unsaturated polyester resin and cellulose cotton in a ratio of 10:1;

[0028] (2) Place an ultra-thin fiberboard on each of the upper and lower surfaces of the calcium silicate board. After the three are assembled, place them in a hot press for curing. The hot press curing time is 2 minutes, the temperature is 130°C, and the pressure is 2MPa. The ultra-thin fiberboard has a thickness of 1mm and a density of 910kg / m 3 ;

[0029] (3) After hot pressing and curing, the boards are taken out, cooled and stacked, and cured at room temperature for 3 days;

[0030] (4) The upper surface of the cured calcium silicate board is paved with decorative impregnated film paper, and the lower surface is paved with balanced impregnated film paper, and then hot-pressed again, cooled and stacked; wherein the decorative impregnated film paper is a special adhesive paper with 0.5% flame retardant added, and the adhesive amount is 150g / m 2 , and aluminum oxide is sprayed on the surface to improve the surface wear resistance; the balanced impregnated film paper is a special paper with 0.5% flame retardant added, and the glue amount is 140g / m 2 The secondary hot pressing has a hot pressing temperature of 180°C, a hot pressing time of 30s, and a hot pressing pressure of 4MPa.

[0031] The prepared A-grade fireproof impregnated paper laminated calcium silicate board has been tested and its relevant performance indicators are shown in Table 1.

[0032] Table 1

[0033]

[0034] Example 2

[0035] A method for manufacturing a Class A fireproof impregnated paper laminated calcium silicate board, comprising the following steps:

[0036] (1) Apply 150g / m2 of calcium silicate on both the upper and lower surfaces. 2 Glue; the mass percentage of the calcium silicate board includes the following components: 50% siliceous material, 30% calcium material, 20% reinforcing fiber, and the thickness is 12mm; the glue is an adhesive made by mixing unsaturated polyester resin and cellulose cotton in a ratio of 10:3;

[0037] (2) Place an ultra-thin fiberboard on each of the upper and lower surfaces of the calcium silicate board. After the three are assembled, place them in a hot press for curing. The ultra-thin fiberboard has a thickness of 2 mm and a density of 890 kg / m 3 The hot pressing curing treatment time is 3 minutes, the temperature is 150°C, and the pressure is 4MPa;

[0038] (3) After hot pressing and curing, the boards are taken out, cooled and stacked, and cured for 5 days;

[0039] (4) The upper surface of the cured calcium silicate board is paved with decorative impregnated film paper, and the lower surface is paved with balanced impregnated film paper, and then hot-pressed again, cooled and stacked; wherein the decorative impregnated film paper is a special adhesive paper with 1% flame retardant added, and the adhesive amount is 160g / m 2 , and aluminum oxide is sprayed on the surface to improve the surface wear resistance; the balanced impregnated film paper is a special paper with 1% flame retardant added, and the glue amount is 150g / m 2 The secondary hot pressing has a hot pressing temperature of 190°C, a hot pressing time of 40s, and a hot pressing pressure of 5MPa.

[0040] The Class A fireproof impregnated paper laminated calcium silicate board prepared in this embodiment has been tested and its relevant performance indicators are shown in Table 2.

[0041] Table 2

[0042]

[0043] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the specification of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for manufacturing a Class A fireproof impregnated paper laminated calcium silicate board, characterized in that: The following steps are involved: (1) Apply 50-150g / m2 of coating on the upper and lower surfaces of the calcium silicate board 2 The calcium silicate board has a thickness of 5 to 20 mm, and the glue is a mixture of unsaturated polyester resin and cellulose cotton in a mass ratio of 10:1 to 10:3; (2) Place an ultra-thin fiberboard on the upper and lower surfaces of the glue-coated calcium silicate board, and heat-press and solidify it after assembly. The ultra-thin fiberboard has a thickness of 1 to 3 mm and a density of 850 to 1000 kg / m 3 ; Hot pressing curing treatment time 1 to 3 minutes, temperature 130 to 150 ° C, pressure 2 to 4 MPa; (3) After hot pressing and curing, the boards are taken out, cooled and stacked, and cured at room temperature for 3 to 5 days; (4) After curing, the upper surface of the board is paved with flame-retardant decorative impregnated film paper, and the lower surface is paved with flame-retardant balance impregnated film paper, which is then hot-pressed again and cooled and stacked.

2. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (1), the calcium silicate board comprises, by mass percentage, 30-60% of siliceous material, 20-40% of calcium material, and 20-30% of reinforcing fiber, and has a thickness of 12 mm.

3. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (1), the glue is a mixture of unsaturated polyester resin and cellulose cotton in a mass ratio of 10:2, and the coating amount is 100g / m 2 .

4. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (2), the ultra-thin fiberboard has a thickness of 2 mm and a density of 900 kg / m 3 .

5. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (2), the hot pressing curing treatment time is 2 minutes, the temperature is 140°C, and the pressure is 3 MPa.

6. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (3), the curing is performed at room temperature for 4 days.

7. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (4), the flame retardant decorative impregnated adhesive film paper is an adhesive paper with 0.5-1% flame retardant added, and the adhesive amount is 150-160g / m 2 , and aluminum oxide is sprayed on the surface.

8. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (4), the flame retardant balanced impregnated adhesive film paper is an adhesive paper with 0.5% to 1% flame retardant added, and the adhesive amount is 140 to 150 g / m 2 .

9. The method for manufacturing the Class A fireproof impregnated paper laminated calcium silicate board according to claim 1, characterized in that: In step (4), the secondary hot pressing is performed at a temperature of 180 to 190° C., a time of 30 to 40 seconds, and a pressure of 4 to 5 MPa.

10. A grade A fireproof impregnated paper laminated calcium silicate board manufactured according to any one of claims 1 to 9.

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