PET wood plastic composite material with sandwich structure
A wood-plastic composite material and sandwich structure technology, which can be used in household appliances, wood-layered products, other household appliances, etc., can solve the problems of restricting the production and application of PET wood-plastic composite materials, high melting temperature, and achieve designability. Strong, good apparent performance, good cushioning effect
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Embodiment 1
[0034]Prepare modified wood flour as follows: take straw powder with a particle size of 170 μm to 190 μm, dry it by heat treatment at 100°C, then extract it with acetone, and dry it for later use; add water to dilute the thermosetting phenolic resin, add the above wood powder, and the weight of the wood powder It is 0.8 times the weight of thermosetting phenolic resin, sonicated in an ultrasonic cleaner at room temperature for 30 minutes, then centrifuged and filtered at a centrifugal speed of 1200r / min for 5 minutes, and the centrifuged filtrate was heat-treated at 128°C for 45 minutes to obtain modified wood pink. Take three parts of the obtained modified wood flour, heat them up to 250°C, 350°C, and 600°C in a high-purity nitrogen atmosphere of 100mL / min, and keep them warm for 30 minutes for pyrolysis. The residual carbon rate is 85.9% and 78.3% respectively. , 64.1%.
Embodiment 2
[0036] Prepare modified wood powder according to the following method: take poplar wood powder with a particle size of 170 μm to 190 μm, dry it by heat treatment at 105 ° C, then extract it with acetone, and dry it for later use; add water to dilute the thermosetting phenolic resin, add the above wood powder, wood powder The weight is 0.8 times the weight of the thermosetting phenolic resin. Ultrasonic at room temperature for 30 minutes in an ultrasonic cleaner, and then centrifugally filtered at a centrifugal speed of 1200r / min for 5 minutes. wood flour. Take three parts of the obtained modified wood flour, heat them up to 250°C, 350°C, and 600°C in a high-purity nitrogen atmosphere of 100mL / min, and keep them warm for 30 minutes for pyrolysis. The residual carbon rate is 87.5% and 76.1% respectively. , 63.5%.
Embodiment 3
[0038] In this embodiment, a PET wood-plastic composite material with a sandwich structure has a layered structure, including at least one middle layer, one side of the middle layer has at least one upper surface layer, and the other side of the middle layer is at least It has a lower surface layer, the middle layer is a foamed PET sheet layer, and both the upper surface layer and the lower surface layer are wood-plastic composite material layers.
[0039] The formula of this material contains PET resin, wood powder, coupling agent, foaming agent, nucleating agent, plasticizer and sodium carboxymethyl cellulose, wherein: the weight percentage of wood powder is 45-65%; PET resin The weight percentage of the foaming agent is 15-39%; the weight percentage of the foaming agent is 4-8%; the weight percentage of the coupling agent is 1.5-4%.
[0040] Described plasticizer is one or more in dioctyl phthalate, acrylic acid, dibutyl phthalate;
[0041] The foaming agent is a compound ...
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Abstract
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