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Electric heating floor blank based on CLT (Cross-Laminated Timber) board and manufacturing method thereof

A manufacturing method and floor blank technology, which are applied in the field of floor manufacturing, can solve the problems of aging and degumming of the adhesive layer on the surface of the film, unstable dimensions of the electric heating floor, cracking of the heating film, etc. Effect

Inactive Publication Date: 2014-08-06
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to improve the dimensional instability of the existing electric heating floor, the aging and degumming of the adhesive layer on the surface of the heating film due to thermal action, the cracking of the heating film caused by long-term use and the power failure phenomenon, etc.; to provide a A solid wood composite electric heating floor blank with simple structure, easy processing and manufacturing, and high stability and its manufacturing method

Method used

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  • Electric heating floor blank based on CLT (Cross-Laminated Timber) board and manufacturing method thereof
  • Electric heating floor blank based on CLT (Cross-Laminated Timber) board and manufacturing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] a. Select the fir CLT board with a three-layer structure, the specification is length × width × thickness = 2440 × 1200 × 15mm, and mill out the grooves of full length along the width direction of the board at intervals of 45mm, the groove width is 17mm, and the depth is 0.5mm;

[0022] b. Cut the heating film with a thickness of 0.4mm into a strip sheet with a length of 2400mm and a width of 15mm and place it in the groove;

[0023] c. Choose a 3mm thick oak wood sawn thin board, apply two-component polyurethane adhesive on one side, and the glue amount is 100g / m2 2 , covered on the surface of the CLT plate embedded with heating film, pressurized and glued into a whole at room temperature, the pressurized pressure is 3MPa, and the pressurized time is 2h;

[0024] d. After aging for 24 hours, saw the CLT board into floor blanks with a length of 1200mm and a width of 200mm.

[0025] Prepared floor blanks such as Figure 1-2 As shown, the electric heating floor blank in...

Embodiment 2

[0028] In this embodiment, the difference from Example 1 is: on the 3mm thick oak veneer, the urea-formaldehyde resin adhesive is coated on one side, and the amount of glue applied is 150g / m 2 , covered on the surface of the CLT plate embedded with the heat-generating film, hot-pressed and glued together as a whole, the hot-pressing pressure is 1.5 MPa, the hot-pressing temperature is 110°C, and the hot-pressing time is 6 minutes.

Embodiment 3

[0030] In this embodiment, the difference from Embodiment 1 is: select the Chinese fir CLT board with three-layer structure, the specification is length×width×thickness=2440×1200×18mm, and choose 1.5mm thick maple veneer as the precious wood surface.

[0031] In this embodiment, the thermal conductivity was measured, and it can reach about 40° C. within 2 hours and keep the temperature constant. After being treated for 48±0.25 hours at a temperature of 50±2°C, the average shrinkage rate of the length is 0.14%, the average shrinkage rate of the width is 0.18%, the average shrinkage rate of the thickness is 2.68%, and the average shrinkage rate of the volume is 2.98%; after treatment for 48±0.25h under the conditions of temperature 40±2℃ and relative humidity 85%±5%, the average wet expansion rate of the length is 0.20%, the average wet expansion rate of the width is 0.18%, and the average wet expansion rate of the thickness The rate is 4.23%, and the volume average wet expansio...

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Abstract

The invention discloses an electric heating floor blank based on a CLT (Cross-Laminated Timber) board and a manufacturing method thereof. The electric heating floor blank comprises a base plate layer (1) and a thin plate layer (4), wherein the base plate layer (1) is a CLT board formed by vertically and horizontally stacking and gluing a plurality layers of single wood boards in a crossed manner; a plurality of grooves (3) are formed in the upper surface of the base plate layer (1); the length directions of the grooves (3) are parallel to the length direction of the uppermost single wood board laminated and stacked in the CLT board of the base plate layer (1); a heating film (2) is placed in each groove (3); the thin plate layer (4) made from valuable timber sheets further covers the base plate layer (1). The manufacturing method comprises the following steps: milling a plurality of grooves on one surface of the CLT board, placing the heating films inside the grooves, and covering the grooves with the valuable timber sheets. Compared with an ordinary solid wood compound electric heating floor, the solid wood compound electric heating floor manufactured by utilizing the method has high stability, and power failure and blank deguming and cracking generated by cracking of the heating films after long-time use are avoided.

Description

technical field [0001] The invention belongs to the technical field of floor manufacturing in the wood processing industry, and more specifically relates to an electric heating floor blank and a manufacturing method thereof. Background technique [0002] Most of the traditional solid wood composite floors are laminated with multi-layer solid wood veneers or spliced ​​with single-layer finger-jointed boards to make core boards. After long-term use, it has been found that the solid wood composite floor made of these core boards may have the disadvantages of internal stress and processing stress, large deformation, unevenness, and poor bending resistance, or due to the use of a large amount of adhesives, the environmental performance of the product is poor. Bending and deformation are not easy to control, the pass rate is low, and the production cost is high. [0003] CLT board is a new technology product of wood structure developed in recent years. Its full name is cross-lami...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B9/04B32B21/00B32B3/30E04F15/02
Inventor 潘彪朱一辛石江涛尹文秀闫薇
Owner NANJING FORESTRY UNIV
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