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Flame-retardant calcium carbonate wood plastic and preparation method thereof

A calcium carbonate and wood-plastic technology, applied in the field of wood-plastic materials, can solve the problems of low performance of wood-plastic products and mismatch of processing temperature, and achieve good economic and social effects, high bending strength, and good practicability.

Inactive Publication Date: 2016-08-03
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 carbonate are much higher than those of general-purpose plastics, and have broad application prospects in wood-plastic products. However, since the melting point of calcium carbonate 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

[0020] Modified calcium carbonate: Dry calcium carbonate and lithium chloride in an oven until the water content is 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 carbonate, 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 carbonate after mixing 6 Alloys are crushed in the crusher.

[0021] Wood-plastic preparation: the weight fractions of the following components are respectively: 50 parts of flame-retardant calcium carbonate 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

[0023] Modified calcium carbonate: Dry calcium carbonate and lithium chloride in an oven until the water content is 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 carbonate, 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.

[0024] Wood-plastic preparation: the weight fractions of the following components are respectively: 80 parts of flame-retardant calcium carbonate 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

[0026] Modified calcium carbonate: Dry calcium carbonate 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 screen, and divide the components according to the following parts by weight: Weighing: 60 parts of calcium carbonate, 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 carbonate 6 alloy after mixing was crushed in the crusher.

[0027] Wood-plastic preparation: The weight fractions of the following components are respectively: 25 parts of flame-retardant calcium carbonate 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 carbonate wood plastic and belongs to the technical field of wood plastic materials. The flame-retardant calcium carbonate wood plastic comprises, by weight, 20-95 parts of flame-retardant calcium carbonate, 5-80 parts of wood fibers, 1-8 parts of lubricant and 1-6 parts of pigment. The invention further discloses a preparation method of the wood plastic. According to the flame-retardant calcium carbonate wood plastic, calcium carbonate modified through metal halide is added, so that flame retardancy is lowered to 200 DEG C or below; meanwhile, PE and PP are added to improve impact resistance of calcium carbonate, so that a wood plastic product is high in bending strength, flexural modulus and unnotched impact strength, and the flame-retardant calcium carbonate wood plastic can partially replace structural materials; by means of the preparation method of the flame-retardant calcium carbonate wood plastic, good practicability is achieved, and good economic benefits and social effects are achieved.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic materials, and in particular relates to a flame-retardant calcium carbonate 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 carbonate are much higher than those of general-purpose plastics, and have broad application prospects in wood-plastic products. However, since the melting point of calcium carbonate generally exceeds 220 ° C, and wood fibers contain high Cellulose (the thermal degradation initiation te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L97/02C08L23/06C08L23/12C08L51/06C08K13/06C08K3/26C08K3/16C08K5/098C08K5/09
CPCC08L97/02C08L2201/02C08L2205/025C08L2205/03C08L2205/035C08L23/06C08L51/06C08K13/06C08K2003/265C08K3/16C08K5/098C08L23/12C08K2003/162C08K5/09
Inventor 何军李靖马长城许世华
Owner NANJING XUHUA SUNDI NEW BUILDING MATERIALS
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