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Hot-pressed wood-plastic composite with sandwich structure and manufacturing method thereof

A technology of wood-plastic composite material and sandwich structure, which is applied in the manufacturing field of hot-press sandwich structure wood-plastic composite material and hot-press sandwich structure wood-plastic composite material, which can solve the problem of low impact toughness, insufficient strength and modulus Requirements, easy crushing and other issues

Inactive Publication Date: 2017-03-22
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Wood-plastic panels produced by traditional hot pressing have disadvantages such as low impact toughness and easy crushing, and with the increase of wood powder content, the strength and modulus will first increase to a certain extent and then decline sharply, and the toughness will decrease more obviously. The impact toughness will be improved to a certain extent if the wood powder content is increased, but the strength and modulus will not meet the requirements

Method used

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  • Hot-pressed wood-plastic composite with sandwich structure and manufacturing method thereof
  • Hot-pressed wood-plastic composite with sandwich structure and manufacturing method thereof
  • Hot-pressed wood-plastic composite with sandwich structure and manufacturing method thereof

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specific Embodiment approach 1

[0025] Specific Embodiment 1: Combining figure 1 Describe this embodiment mode, a wood-plastic composite material with a hot-pressed sandwich structure and its manufacturing method described in this embodiment mode, including a wood-plastic composite material layer, and the wood-plastic composite material layer is at least divided into an upper surface wood-plastic material layer 1 and the lower surface wood-plastic material layer 3, there is also a core material layer 2 between the upper surface wood-plastic material layer 1 and the lower surface wood-plastic material layer 3, and the core material layer 2 Form a hot-pressed sandwich structure with the upper surface wood-plastic material layer 1 and the lower surface wood-plastic material layer 3, the core layer material layer 2 is made of flexible polymer materials, and constitutes the hot-pressed sandwich structure flexible intercalation.

[0026] The technical effect of this embodiment is: glass is a fragile material, but...

specific Embodiment approach 2

[0027] Specific Embodiment 2: Combining figure 1 Describe this embodiment, the wood-plastic composite material with a hot-pressed sandwich structure described in this embodiment, the core material layer 2 is a continuum of flexible polymer intercalation made of thermoplastic polymers, the thermoplastic Polymers include polyethylene, polypropylene, polyvinyl chloride and polystyrene, etc., and a mixture of one or more of them, and the thermoplastic polymers are new or recycled materials; others are the same as in Embodiment 1.

[0028]The technical effect of this embodiment is: thermoplastic polymer is a kind of flexible polymer with good toughness, as the core material layer, it can endow the wood-plastic composite material with sandwich structure with good impact toughness, low density and other advantages, and thermoplasticity Polymers are thermoplastic polymers, with low processing temperature and simple process, and can be recycled and reused many times. The elastic contin...

specific Embodiment approach 3

[0029] Specific embodiment 3: The core material layer 2 is made of a mixture of thermoplastic polymers and compatibilizers in a certain proportion, and the thermoplastic polymers include polyethylene, polypropylene, polyvinyl chloride and polystyrene One or more of them, the thermoplastic polymer is new material or recycled material; the compatibilizer is maleic anhydride grafted polyethylene, maleic anhydride grafted polypropylene, titanium One or a mixture of several of esters, isocyanates, and silanes; others are the same as in Embodiment 1.

[0030] The technical effect of this embodiment is: the thermoplastic polymer is melt-mixed with a compatibilizer as the core material layer, which can well improve the interface between the non-polar thermoplastic polymer and the polar wood powder in the upper and lower wood-plastic layers Compatibility, improve the bonding strength between the core material layer and the upper and lower wood-plastic material layers, thereby improving...

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Abstract

The invention provides a hot-pressed wood-plastic composite with a sandwich structure, relates to a wood-plastic composite and specifically relates to the wood-plastic composite with the sandwich structure. The invention aims to solve the problems that the reinforcing and toughening effects cannot be simultaneously achieved, the comprehensive mechanical property is poor, the material density is high, the cost is high and the recycled waste plastic is difficult to be recycled when the wood-plastic composite taking a present thermoplastic polymer as a substrate is used as a panel. The wood-plastic composite comprises a thermoplastic polymer plastic core-layer material, an upper surface layer of wood-plastic material and a lower surface layer of wood-plastic material. The wood-plastic composite with the sandwich structure is obtained by hot-pressing in the manner of layering laminating. According to the invention, the problems of poor comprehensive mechanical property, high density and high cost of the wood-plastic composite based on the thermoplastic polymer can be solved. The invention also provides a preparation method for the wood-plastic composite with the sandwich structure.

Description

technical field [0001] The invention relates to the field of material processing, in particular to a wood-plastic composite material with a hot-press sandwich structure, and also relates to a method for manufacturing the wood-plastic composite material with a hot-press sandwich structure. Background technique [0002] Wood-plastic composite (WPC) is a new type of environmentally friendly material. It has the characteristics of wide source of raw materials, cheap price, good dimensional stability, good heat resistance, repeatable processing and recycling. It is widely used in construction, logistics, decoration, furniture, gardens and other fields. The development of wood-plastic composite materials is not only conducive to the protection of forest resources, but also can solve the increasingly serious problem of plastic waste in cities, and is conducive to the sustainable development of society and economy. [0003] The hot pressing method is one of the methods for prepari...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/04B32B27/08B32B27/20B32B37/02B32B37/06B32B37/10B32B37/15C08L97/02C08L23/06C08L27/06C08K5/10C08K3/26
CPCB32B27/08B32B27/20B32B37/02B32B37/06B32B37/10B32B37/153B32B2260/025B32B2260/046B32B2307/546B32B2307/558C08L27/06C08L97/02C08L2205/03C08L2205/035C08L2205/08C08L2205/16C08L2207/062C08L23/06C08L51/06C08K5/10C08K2003/265
Inventor 王清文郝笑龙周海洋王海刚欧荣贤孙理超
Owner SOUTH CHINA AGRI UNIV
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