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Flame-retardant calcium carbide sythetic-wood and preparation method thereof

A flame-retardant calcium carbide and calcium carbide technology, applied in the field of wood-plastic materials, can solve the problems of low performance of wood-plastic products and mismatching processing temperature, etc., and achieve good economic benefits and social effects, high bending strength, and good practicability Effect

Inactive Publication Date: 2016-09-07
NANJING XUHUA SUNDI NEW BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the use of general-purpose plastics such as PE, PVC, and PP as base materials, the performance of the obtained wood-plastic products is not high, and can only be used in low-end places.
[0003] The bending strength and flexural modulus of engineering plastic calcium carbide are much higher than those of general-purpose plastics, so it has broad application prospects in wood-plastic products. However, since the melting point of calcium carbide generally exceeds 220 ° C, and wood fibers contain high Cellulose (the thermal degradation initiation temperature exceeds 250°C), also contains hemicellulose and lignin whose thermal degradation initiation temperature is lower than 200°C, the processing temperature mismatch is difficult to solve

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Modified calcium carbide: Dry calcium carbide and lithium chloride in an oven to a moisture content below 0.1%, mill lithium chloride in a ball mill, pass through a 80-mesh sieve, and divide each component according to the following parts by weight: Weighing: 50 parts of calcium carbide, 10 parts of lithium chloride, 35 parts of PE, 5 parts of maleic anhydride grafted PE, mixed in the internal mixer for 5 minutes, the temperature is set at 240 ° C, the flame-retardant calcium carbide after mixing The alloy is crushed in the crusher.

[0022] Wood-plastic preparation: the weight fractions of the following components are respectively: 50 parts of flame-retardant calcium carbide alloy, 40 parts of wood fiber, 5 parts of zinc stearate, and 5 parts of iron oxide red. The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is extruded into shape.

Embodiment 2

[0024] Modified calcium carbide: Dry calcium carbide and lithium chloride in an oven to a water content below 0.1%, mill lithium chloride in a ball mill, pass through a 100-mesh sieve, and divide each component according to the following parts by weight: Weighing: 70 parts of calcium carbide, 15 parts of lithium chloride, 10 parts of PP, 5 parts of maleic anhydride grafted PP, mixed in a mixer for 8 minutes, and then granulated. The temperature of each zone of the granulator is set at 180-280°C.

[0025] Wood-plastic preparation: the weight fractions of the following components are respectively: 80 parts of flame-retardant calcium carbide alloy, 10 parts of wood fiber, 5 parts of calcium stearate, and 5 parts of iron oxide yellow. The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is injection molded.

Embodiment 3

[0027] Modified calcium carbide: Dry calcium carbide and calcium chloride in an oven until the moisture content is below 0.1%, ball-mill calcium chloride in a ball mill, pass through a 100-mesh sieve, and divide each component according to the following parts by weight: Weighing: 60 parts of calcium carbide, 10 parts of calcium chloride, 10 parts of PE, 10 parts of PP, 5 parts of GMA grafted PE, 5 parts of maleic anhydride grafted PP, mixed in the internal mixer for 5 minutes, and the temperature was set At 240°C, the flame-retardant calcium carbide alloy after kneading is crushed in a crusher.

[0028] Wood-plastic preparation: the weight fractions of the following components are respectively: 25 parts of flame-retardant calcium carbide alloy, 70 parts of wood fiber, 3 parts of stearic acid, and 2 parts of titanium dioxide. The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is extruded into shape.

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Abstract

The invention discloses flame-retardant calcium carbide sythetic-wood, and belongs to the technical field of sythetic-wood materials. The flame-retardant calcium carbide sythetic-wood comprises the following components in parts by weight: 25-40 parts of flame-retardant calcium carbide, 5-80 parts of wood fiber, 1-8 parts of a lubricant and 1-6 parts of pigment. The invention further discloses a preparation method of the flame-retardant calcium carbide sythetic-wood. According to the flame-retardant calcium carbide sythetic-wood disclosed by the invention, as the calcium carbide is modified by adding metal halide, the flame retardant temperature is reduced to be lower than 200 DEG C, meanwhile due to addition of PE and PP, the impact resistance of the calcium carbide can be improved, and thus a sythetic-wood product is relatively good in bending strength, bending elastic modus and notch-less impact resistance and can partially replace structural materials; the preparation method of the flame-retardant calcium carbide sythetic-wood is very good in practicability, relatively high in economic benefit and relatively good in social effect.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic materials, and in particular relates to a flame-retardant calcium carbide wood-plastic and a preparation method thereof. Background technique [0002] In recent years, due to the advantages of environmental protection, recyclability, and non-toxicity, wood-plastic has been gradually applied to outdoor landscape garden materials. However, due to the use of general-purpose plastics such as PE, PVC, and PP as base materials, the performance of the obtained wood-plastic products is not high, and can only be used in low-end places. [0003] The bending strength and flexural modulus of engineering plastic calcium carbide are much higher than those of general-purpose plastics, so it has broad application prospects in wood-plastic products. However, since the melting point of calcium carbide generally exceeds 220 ° C, and wood fibers contain high Cellulose (the thermal degradation initiation tempera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L51/06C08K13/02C08K3/14C08K3/16C08K5/098C08K5/09
CPCC08L97/02C08L2201/02C08L2205/02C08L2205/025C08L2205/03C08L2205/035C08L2205/16C08L23/06C08L51/06C08K13/02C08K3/14C08K3/16C08K5/098C08L23/12C08K2003/162C08K5/09
Inventor 李靖马长城许世华何军
Owner NANJING XUHUA SUNDI NEW BUILDING MATERIALS
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