Environment-friendly composite building material and preparation method thereof

Abstract

The invention discloses an environment-friendly composite building material and a preparation method thereof, and the environment-friendly composite building material comprises the following components in parts by weight: 50-70 parts of natural grass, 10-20 parts of calcium carbonate, 52-78 parts of wood flour, 5-27 parts of polyethylene, 16-28 parts of polyamide, 13-24 parts of polyvinyl chloride, 5-10 parts of azodicarbonamide, 2-4 parts of calcium stearate, 2-5 parts of paraffin and 2-6 parts of a stabilizer. The produced building material product has the advantages of high strength, light weight, wear resistance, oil resistance, water resistance, fire resistance, shock resistance, no efflorescence, heat insulation and sound insulation, and no noise and no pollution during production.

Description

Technical Field

[0001] The present invention belongs to the field of building materials, and particularly relates to an environmentally friendly composite building material and a preparation method thereof. Background Art

[0002] As one of the building materials widely used in modern home decoration and construction projects, composite building materials are widely favored due to their excellent performance and low cost. At present, most building materials are made mainly of wood chips. Using wood chips reduces the logging of trees to a certain extent. However, due to the large market demand, a large number of trees are still consumed every year, thus causing damage to the ecological environment, such as soil erosion, land desertification, etc. Summary of the Invention

[0003] Object of the Invention: To solve the deficiencies of the prior art, the present invention provides an environmentally friendly composite building material and a preparation method thereof.

[0004] Technical Solution: An environmentally friendly composite building material, by weight, comprises 50 - 70 parts of natural grass, 10 - 20 parts of calcium carbonate, 52 - 78 parts of wood powder, 5 - 27 parts of polyethylene, 16 - 28 parts of polyamide, 13 - 24 parts of polyvinyl chloride, 5 - 10 parts of azodicarbonamide, 2 - 4 parts of calcium stearate, 2 - 5 parts of paraffin wax, and 2 - 6 parts of stabilizer.

[0005] A preparation method of an environmentally friendly composite building material, comprising the following steps:

[0006] Step 1: Crush natural grass and paraffin wax into powders with a mesh size of 120 - 240, and crush polyethylene, wood powder, and calcium carbonate into powders with a mesh size of 280 - 360;

[0007] Step 2: Mix azodicarbonamide, polyamide, calcium stearate, polyvinyl chloride, stabilizer, and the ground natural grass, paraffin wax, polyethylene, wood powder, and calcium carbonate evenly, heat to 120 - 140 °C, and cool with water to 26 - 38 °C to obtain a mixed raw material;

[0008] Step 3: Heat the mixed raw material to 190 °C - 210 °C, keep warm for 6 - 8 h, and extrude in a mold to obtain a composite building material.

[0009] Advantageous Effects: The building material products produced by the present invention have high strength, light weight, and have the properties of wear resistance, oil resistance, waterproofness, fire resistance, earthquake resistance, non - back - brining, heat insulation and sound insulation. There is no noise and no pollution during production. Detailed Embodiments

[0010] The technical solutions in the embodiments of the present invention will be clearly and completely described below, so that those skilled in the art can better understand the advantages and features of the present invention, and thus more clearly define the protection scope of the present invention. The described embodiments of the present invention are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the protection scope of the present invention. Specific Embodiment 1

[0012] An environmentally friendly composite building material, by weight, 50 parts of natural grass, 10 parts of calcium carbonate, 52 parts of wood powder, 5 parts of polyethylene, 16 parts of polyamide, 13 parts of polyvinyl chloride, 5 parts of azodicarbonamide, 2 parts of calcium stearate, 2 parts of paraffin, 2 parts of stabilizer.

[0013] A preparation method of an environmentally friendly composite building material includes the following steps:

[0014] Step 1: Crush natural grass and paraffin into powders with a mesh size of 120, and crush polyethylene, wood powder, and calcium carbonate into powders with a mesh size of 280.

[0015] Step 2: Mix azodicarbonamide, polyamide, calcium stearate, polyvinyl chloride, stabilizer, and the ground natural grass, paraffin, polyethylene, wood powder, and calcium carbonate evenly, heat to 120 °C, and cool with water to 26 °C to obtain a mixed raw material.

[0016] Step 3: Heat the mixed raw material to 190 °C, keep it warm for 6 h, and extrude it in a mold to obtain a composite building material. Specific Embodiment 2

[0018] An environmentally friendly composite building material, by weight, 70 parts of natural grass, 20 parts of calcium carbonate, 78 parts of wood powder, 27 parts of polyethylene, 28 parts of polyamide, 24 parts of polyvinyl chloride, 10 parts of azodicarbonamide, 4 parts of calcium stearate, 5 parts of paraffin, 6 parts of stabilizer.

[0019] A preparation method of an environmentally friendly composite building material includes the following steps:

[0020] Step 1: Crush natural grass and paraffin into powders with a mesh size of 240, and crush polyethylene, wood powder, and calcium carbonate into powders with a mesh size of 360.

[0021] Step 2: Mix azodicarbonamide, polyamide, calcium stearate, polyvinyl chloride, stabilizer, and the ground natural grass, paraffin, polyethylene, wood powder, and calcium carbonate evenly, heat to 140 °C, and cool with water to 38 °C to obtain a mixed raw material.

[0022] Step 3: Heat the mixed raw materials to 210°C, keep warm for 8 hours, and extrude them in a mold to obtain composite building materials. Specific Example 3

[0024] An environmentally friendly composite building material, by weight, comprises 60 parts of natural grass, 14 parts of calcium carbonate, 66 parts of wood powder, 16 parts of polyethylene, 21 parts of polyamide, 19 parts of polyvinyl chloride, 7 parts of azodicarbonamide, 3 parts of calcium stearate, 4 parts of paraffin wax, and 4 parts of stabilizer.

[0025] A preparation method of an environmentally friendly composite building material, comprising the following steps:

[0026] Step 1: Crush natural grass and paraffin wax into powders with a mesh size of 180, and crush polyethylene, wood powder, and calcium carbonate into powders with a mesh size of 320.

[0027] Step 2: Mix azodicarbonamide, polyamide, calcium stearate, polyvinyl chloride, stabilizer, and the ground natural grass, paraffin wax, polyethylene, wood powder, and calcium carbonate evenly, heat to 130°C, and cool with water to 32°C to obtain mixed raw materials.

[0028] Step 3: Heat the mixed raw materials to 196°C, keep warm for 7 hours, and extrude them in a mold to obtain composite building materials.

Claims

1. An environmentally friendly composite building material, characterized in that: By weight, 50-70 parts of natural grass, 10-20 parts of calcium carbonate, 52-78 parts of wood flour, 5-27 parts of polyethylene, 16-28 parts of polyamide, 13-24 parts of polyvinyl chloride, 5-10 parts of azodicarbonamide, 2-4 parts of calcium stearate, 2-5 parts of paraffin, and 2-6 parts of stabilizer.

2. A method for preparing the environmentally friendly composite building material according to claim 1, characterized in that: The steps include: Step 1: Grind natural grass and paraffin into powders of 120-240 mesh, and grind polyethylene, wood powder and calcium carbonate into powders of 280-360 mesh; Step 2: Evenly mix azodicarbonamide, polyamide, calcium stearate, polyvinyl chloride, stabilizer, ground natural grass, paraffin, polyethylene, wood powder and calcium carbonate, heat to 120-140° C., and water cool to 26-38° C. to obtain a mixed raw material; Step 3: heating the mixed raw materials to 190° C.-210° C., keeping the temperature for 6-8 hours, and extruding in a mold to obtain a composite building material.