Low-melting-point nylon wood/plastic product and preparation method thereof

A low-melting-point nylon technology, applied in the field of wood-plastic materials, low-melting-point nylon wood-plastic and its preparation, can solve problems such as low strength, high production cost, and environmental pollution, and achieve the effect of improving mechanical properties and avoiding degradation

Inactive Publication Date: 2016-10-12
NANJING XUHUA SUNDI NEW BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional wood-plastic composite materials use PVC, PE, and PP three general-purpose plastics as base materials, and their strength is not high, so they can only be used in places with low performance requirements. Generally, the bending strength does not exceed 50MPa, so they cannot be used as structural materials.
[0003] Many researchers have studied the use of nylon as a base material to produce wood-plastic composites, but because the melting point of nylon generally exceeds 220°C, and wood fibers contain high-temperature-resistant cellulose (the thermal degradation initiation temperature exceeds 250°C), there are also Contains hemicellulose and lignin whose thermal degradation initiation temperature is lower than 200°C, the processing temperature does not match, and the degradation is serious. Therefore, nylon and cellulose or nanocellulose are generally mixed for extrusion or injection molding, and the production cost is high, and Preparation of cellulose or nanocellulose requires more energy and pollutes the environment

Method used

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  • Low-melting-point nylon wood/plastic product and preparation method thereof
  • Low-melting-point nylon wood/plastic product and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Modified nylon: Dry nylon 6 and lithium chloride in an oven until the water content is below 0.1%, ball-mill lithium chloride in a ball mill, and pass through a 100-mesh sieve. The parts by weight of the following components are: Nylon 6: 95 parts; Lithium chloride: 5 parts. The two were mixed in an internal mixer for 5 minutes, and the temperature was set at 240 ° C. After mixing, the low melting point nylon 6 was crushed in the crusher.

[0026] 2. Wood-plastic preparation: The weight fractions of the following components are: low melting point nylon 6:50 parts, wood fiber: 40 parts, isocyanate chain extender: 5 parts, stearic acid: 3 parts, iron oxide red: 2 parts . The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is extruded into shape.

Embodiment 2

[0028] 1. Modified nylon: Dry nylon 66 and calcium chloride in an oven until the water content is below 0.1%. After ball milling calcium chloride in a ball mill, pass through a 100-mesh screen. The parts by weight of the following components are respectively Nylon 66: 85 parts; Lithium chloride: 15 parts. Mix the two in an internal mixer for 6 minutes, set the temperature at 260°C, and crush the low-melting nylon 66 after mixing in a crusher.

[0029] 2. Wood-plastic preparation: the weight fractions of the following components are: low melting point nylon 66:80 parts, wood fiber: 15 parts, zinc stearate: 3 parts, iron oxide yellow: 2 parts. The above materials are mixed in a mixer and granulated by a granulator, and the granulated material is injection molded.

Embodiment 3

[0031] 1. Modified nylon: Dry nylon 6 and lithium chloride in an oven until the moisture content is below 0.1%, mill lithium chloride in a ball mill, and pass through a 80-mesh screen. The parts by weight of the following components are respectively: Nylon 6: 97 parts; Lithium chloride: 3 parts, the two are mixed in a mixer, and then granulated, and the temperature of each zone is set as follows:

[0032] interval

[0033] 2. Wood-plastic preparation: The weight fractions of the following components are: low melting point nylon 6:30 parts, wood fiber: 60 parts, epoxy resin chain extender: 5 parts, zinc stearate: 3 parts, iron oxide yellow : 2 servings. 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 a low-melting-point nylon wood/plastic product and a preparation method thereof. Nylon and metal halide are dried until the water content is 0.1% or lower, then modification is performed with an internal mixer or a pelletizer, the melting point of nylon is reduced to 200 DEG C or lower, then the modified low-melting-point nylon is mixed with wood fibers, a chain extender, a lubricant and a pigment for pelleting, and the wood/plastic product with excellent mechanical properties is obtained through extrusion or injection molding.

Description

technical field [0001] The invention belongs to the technical field of material production, and relates to a wood-plastic material, in particular to a low-melting-point nylon wood-plastic and a preparation method thereof. Background technique [0002] Due to its high strength, engineering plastic nylon can generally be used as a structural material and can be widely used in automobiles, construction, electronic appliances, aerospace and other fields. Traditional wood-plastic composite materials use PVC, PE, and PP three general-purpose plastics as base materials. They have low strength and can only be used in places with low performance requirements. Generally, the bending strength does not exceed 50MPa and cannot be used as structural materials. [0003] Many researchers have studied the use of nylon as a base material to produce wood-plastic composites, but because the melting point of nylon generally exceeds 220°C, and wood fibers contain high-temperature-resistant cellul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08L97/02C08K5/09C08K5/098C08K3/22C08G69/48
CPCC08L77/02C08G69/48C08L2205/03C08L97/02C08K5/09C08K2003/2272C08K5/098
Inventor 许世华王清文马长城何军李靖戴东花
Owner NANJING XUHUA SUNDI NEW BUILDING MATERIALS
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