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Electric-heating composite material based on high-frequency no-adhesive compaction technology

A composite material and high-frequency technology, applied in the field of wood processing, can solve the problems of wood deformation, harm to human health, and increased deformation, and achieve good performance in resisting shear force of horizontal and vertical grains, low formaldehyde and xylene content, Excellent compressive and tensile properties

Active Publication Date: 2019-05-21
王凯
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, the research and application of composite materials have received high attention. It has a variety of excellent properties, does not require secondary processing, and is easy to install. However, the existing composite materials mostly use organic materials that contain formaldehyde, xylene, etc. that are harmful to the human body. , endanger human health, and cannot meet people's needs. At the same time, composite materials made of various wood boards still have problems such as glue opening, and the defect rate is high, which increases production costs.
On the other hand, with the continuous development of science and technology, heating floors combined with heating elements appear, but there are many deficiencies in the existing electrothermal composite wood boards. Changes in temperature and humidity will cause drying shrinkage and wet swelling, and wood will deform, warp and crack, resulting in a decrease in its mechanical properties and an increase in deformation

Method used

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  • Electric-heating composite material based on high-frequency no-adhesive compaction technology
  • Electric-heating composite material based on high-frequency no-adhesive compaction technology
  • Electric-heating composite material based on high-frequency no-adhesive compaction technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1-6

[0047] Examples 1-6 provide 6 kinds of electrothermal composite materials based on high-frequency glue-free compaction technology. The 6 composite materials are sequentially composed of the first compacted wood layer, the first thermoplastic resin film layer, the electrothermal layer, and the second composite material from top to bottom. It consists of two thermoplastic resin film layers and a second compacted wood layer. Among them, the compacted wood layer material is poplar with a thickness of 40 mm; the composite material is prepared by the following steps:

[0048] 1) The selected density does not exceed 0.7kg / m 3 The two pieces of wood are respectively heated and compacted by high frequency, and then cooled to obtain the first compacted wood layer and the second compacted wood layer; wherein, the separate compaction makes the first compacted wood layer and the second compacted wood layer The compression rate of the dense wood layer reaches the initial compression rate P...

Embodiment 7-9

[0061] On the basis of Example 1, the technical solutions provided by Examples 7-9 also include a health-preserving treatment step. Specifically, after step 2), the electrothermal composite material after cooling treatment is placed at room temperature for 15- 20 days to complete the health care treatment.

[0062] The parameters of the preparation process of the composite materials in Examples 1-9 are shown in Table 1, wherein A represents the first compacted wood, and B represents the second compacted wood. In the independent compaction steps of Examples 1-7 in the table below, the high-frequency heating is performed until the wood temperature is 220° C., and the wood is kept for 8 minutes to cure the wood.

[0063] The concrete parameter of table 1 embodiment 1-9

[0064]

[0065]

[0066] Among them, PVA refers to polyvinyl alcohol resin, PVB refers to polyvinyl butyral resin, and PVC refers to polyvinyl chloride resin. The moisture content is the average moisture ...

Embodiment 10

[0068] This embodiment provides a composite material prepared by the following steps:

[0069] 1) The selected density does not exceed 0.7kg / m 3 The two pieces of wood are respectively heated and compacted by high frequency, and then cooled to obtain the first compacted wood layer and the second compacted wood layer; wherein, the separate compaction makes the first compacted wood layer and the second compacted wood layer The compression rate of the dense wood layer reaches the initial compression rate P1.

[0070] Among them, the heating, compacting and cooling process includes:

[0071] 1.1) Heating the board to a temperature of 90°C, keeping it warm for 5 minutes, and pressing the wood to obtain the preset initial compression ratio;

[0072] 1.2) Heating the pressed board with a high frequency wave until the temperature of the board is 180°C, and keeping it warm for 5 minutes to obtain a cured board;

[0073] 1.3) Cool the solidified boards to an average temperature of 30...

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Abstract

The invention relates to an electric-heating composite material based on a high-frequency no-adhesive compaction technology. The electric-heating composite material is characterized in that the electric-heating composite material sequentially comprises a first compaction wood layer, a first thermoplastic resin film layer, an electric-heating layer, a second thermoplastic resin film layer and a second compaction wood layer from top to bottom, wherein the first compaction wood layer and the second compaction wood layer are manufactured by high-frequency heating compaction; then, the second compaction wood layer, the first thermoplastic resin film layer, the electric-heating layer, the second thermoplastic resin film layer and the second compaction wood layer are sequentially stacked in a stress direction, are subjected to high-frequency secondary heating compaction, and are heated and cooled to obtain the electric-heating composite material. The electric-heating composite material is high in strength and is good in toughness, and further has moisture retention property, heating property, anti-compression anti-shearing property and anticorrosive wearable property.

Description

technical field [0001] The invention belongs to the technical field of wood board processing, and in particular relates to an electrothermal composite material based on high-frequency glue-free compaction technology. Background technique [0002] In recent years, the research and application of composite materials have received high attention. It has a variety of excellent properties, does not require secondary processing, and is easy to install. However, the existing composite materials mostly use organic materials that contain formaldehyde, xylene, etc. that are harmful to the human body. , endanger human health, and cannot meet people's needs. At the same time, composite materials made of various wood boards also have problems such as degluing, and the defect rate is high, which increases production costs. On the other hand, with the continuous development of science and technology, heating floors combined with heating elements appear, but there are many deficiencies in t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27D1/04B27D1/08B27K5/00B27M1/02B32B21/08B32B27/30B32B27/08B32B27/06B32B27/36B32B27/28B32B3/08B32B33/00
Inventor 王凯
Owner 王凯
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