High-strength wood-plastic composite with swelling resistance, moisture resistance and ageing resistance and preparation method of wood-plastic composite
A wood-plastic composite material, high-strength technology, applied in the field of wood-plastic composite material and its preparation
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[0039] The preparation method of the wood-plastic composite material of the present invention includes masticating, extruding and cooling processes, specifically including:
[0040] The plasticating refers to adding all the raw materials weighed according to the formula ratio into the internal mixer, stirring and blending at a high speed at 100-240°C for 12-20 minutes to obtain pre-plasticized materials;
[0041] The extrusion refers to sending the pre-plasticized material to a single-screw or twin-screw extruder through a double-wrist or double-cone feeder, and directly extruding the pre-plasticized material at 130~190°C The good materials are sent to the granulator for granulation, and then the prepared pellets are sent to the extruder for molding;
[0042] Said cooling refers to cooling the formed parison until it is finalized.
[0043] The preparation method of the present invention may also include a cutting process, which is to cut the shaped parison according to the re...
Embodiment 1
[0051] - Preparation of wood-plastic composite materials
[0052] (1) Raw material composition:
[0053] 15 parts of PE resin powder after sorting, cleaning and drying to a moisture content of 2~5%
[0054] Chlorinated polyethylene 10 parts
[0055] 50 parts of wood powder with a particle size of 180~250μm and a moisture content of ≤10%
[0056] 5~15 parts of wollastonite powder with a particle size of 18~23μm and a moisture content of ≤1%
[0057] 5 parts of calcium oxide with a particle size of 5~45μm
[0058] Aluminate coupling agent (UP802) 2 parts
[0059] No. 56 paraffin wax 3 parts
[0060] (2) Preparation method:
[0061] Put all the raw materials weighed according to the proportion of the formula into the 110-type internal mixer. The working temperature of the internal mixer is controlled at 150~200°C, and the speed of the double-edged rotor is 20~40r / min. Automatic heating with strong shearing force, high-speed stirring and blending for 12 minutes, to obtain pre...
Embodiment 2
[0065] - Preparation of wood-plastic composite materials
[0066] (1) Raw material composition:
[0067] 20 parts of PP resin powder after sorting, cleaning and drying to a moisture content of 2~5%
[0068] Chlorinated polyethylene 9 parts
[0069] 60 parts of bamboo powder with a particle size of 180~250μm and a moisture content of ≤10%
[0070] 5 parts of wollastonite powder with a particle size of 18~23μm and a moisture content of ≤1%
[0071] 1 part of calcium oxide with a particle size of 5~45μm
[0072] Silane coupling agent (KH570) 2 parts
[0073] 3 parts of PP wax
[0074] (2) Preparation method:
[0075] Put all the raw materials weighed according to the proportion of the formula into the 110-type internal mixer. The working temperature of the internal mixer is controlled at 100~170°C, and the speed of the double-edged rotor is 20~40r / min. Automatic heating with strong shearing force, high-speed stirring and blending for 20 minutes, to obtain pre-plasticized a...
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