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Manufacturing method of non-formaldehyde solid wood composite floor using low-density cottonwood veneers as base materials

A technology of solid wood composite flooring and poplar veneer, which is applied to wood processing equipment, manufacturing tools, floors, etc., can solve the problems of high production speed, low density, and large proportion of young wood in poplar, and achieve efficient resource utilization Effects of utilization, enhanced dimensional stability, and efficient value-added utilization

Active Publication Date: 2014-04-09
INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the fast production speed of poplar wood, the large proportion of young wood, loose material, low density and easy deformation, it is difficult to apply it to floor production at present.
[0003] At present, most of the plywood and wood products based on plywood technology on the market, such as solid wood composite flooring, use adhesives containing formaldehyde. During the production and use of products, a large amount of free formaldehyde will be released, causing environmental pollution.

Method used

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  • Manufacturing method of non-formaldehyde solid wood composite floor using low-density cottonwood veneers as base materials

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The present invention utilizes the existing solid wood composite floor processing and production technology and equipment, uses recycled HDPE (high-density polyethylene) plastic as the bonding material, adopts the 0.6mm thick oak veneer veneer technology, and takes the following steps:

[0056] 1. Select poplar logs with a diameter of 15-20 cm. After cooking at a low temperature of 20°C for 30 hours, they are peeled or sliced ​​into poplar veneers (select those with a thickness of 1.5 mm or more), and then dry the veneers to moisture Rate of 15%;

[0057] 2. Cut precious logs into decorative veneer, and place the veneer in the atmosphere to dry naturally to reduce the moisture content to below 25%;

[0058] 3. Separate the recycled plastic into HDPE, crush and clean it, then granulate and blow the scrap into a plastic film;

[0059] 4. Paint the dried poplar veneer with silane coupling agent; the amount of silane coupling agent selected is 10% of the weight of the plastic film,...

Embodiment 2

[0065] In the production, the new HDPE is used as the production material, and the 0.6mm thick oak veneer technology is adopted, and the equipment and steps are similar to those in Example 1.

[0066] Only the recycled plastic described in step 3 in Example 1 is directly purchased for HDPE particle blown film; in step 4 in Example 1, a coating polyurethane coupling agent is used instead, and the coating amount is 1-20% of the weight of the film. For 15 minutes, the remaining steps, equipment and parameters are the same as in Example 1.

Embodiment 3

[0068] In the production, recycled PP is used as the bonding material, and the 2mm thick oak veneer veneer technology is adopted. The equipment and steps are the same as in Example 1, except that the production process parameters are changed, as follows:

[0069] Step 3: Separate the recycled plastic into PP, pulverize and clean, and then granulate and blow the scrap into a plastic film. The other parameters are the same as in Example 1, except that the extrusion temperature is changed to 150-240°C, and the film blowing temperature is changed to 160-250°C;

[0070] Step 5: Assemble the low-density poplar veneer and the plastic film, and obtain the poplar substrate through hot pressing and shaping. Other parameters are the same as in Example 1, except that the hot pressing temperature is changed to 150-220°C;

[0071] Other steps, equipment and process parameters are the same as in Example 1.

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Abstract

The invention provides a manufacturing method of a non-formaldehyde solid wood composite floor using low-density cottonwood veneers as base materials. The non-formaldehyde solid wood composite floor is at least a cottonwood base plate assembly manufactured by combining following two raw materials: first, cottonwood veneers formed by stewing cottonwood logs at a low temperature of 10 to 50 DEC C, then rotary-cutting or slicing the cottonwood logs and afterwards drying the cottonwood logs, and second, plastic adhesive films manufactured by adopting thermoplastic resin; the treated cottonwood veneers are coated with coupling agents and are then assembled with the plastic adhesive films, and after hot-pressing and setting treatment, a cottonwood base plate is manufactured; afterwards, decorative thin wood is adopted as a surface layer and is combined with the cottonwood base plate assembly, and after cold-pressing, a floor blank is manufactured; and finally, the floor blank is milled, tenoned, slotted, and subjected to paint curing, and then a product is manufactured. Through using high polymer materials, from which no harmful substance escapes, in both the machining process and the use process, the environmentally friendly solid wood composite floor is produced.

Description

Technical field [0001] The invention relates to a method for making building materials, in particular to a method for making formaldehyde-free solid wood composite flooring. Background technique [0002] As an important paving material, solid wood composite flooring is widely used in interior decoration. Poplar is an important fast-growing and high-yielding forest species in my country, with a wide planting area and large accumulation. However, due to the fast production speed of poplar wood, the large proportion of young wood, the loose material, low density, and easy deformation, it is difficult to apply to the production of flooring. [0003] At present, most of the plywood and wood products based on plywood technology on the market, such as solid wood composite flooring, use formaldehyde-containing adhesives. During the production and use of the products, a large amount of free formaldehyde will be released and cause environmental pollution. In the 2002 World Health Report pu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27M3/04B32B21/08E04F15/04
Inventor 王正常亮郭文静任一萍范留芬高黎
Owner INST OF WOOD INDUDTRY CHINESE ACAD OF FORESTRY
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