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Gluing method for hot melt adhesive used for production of artificial boards

A hot-melt adhesive and wood-based panel technology, used in the joining of wooden veneers, manufacturing tools, wood processing appliances, etc. Small amount of creeping tendency, good product stability, small water swelling rate

Inactive Publication Date: 2017-08-25
潘学扬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] In summary, the production method of the prior art has the following disadvantages: (1), the hot pressing temperature is high, and the energy consumption is high; (2), the hot pressing time is long, and the production efficiency is low; (3), the moisture content of the product is partial Low, the thermal compression stress of the glued product is large, causing a large warping deformation rate and a large water expansion rate; (4), the product is not conducive to the subsequent finishing process; (5) this method is not suitable for pressing veneer, decorative paper and other decorations Surface materials, because the high temperature of hot pressing is easy to cause cracking of the facing materials during pressing; (6), hot melt adhesives with high melting point temperature are not suitable; (7), the adhesive film has no initial tack, and the adhesive film and the veneer When paving and assembling blanks and transporting other materials, problems such as film displacement, wrinkles, overlapping of veneers and seam gaps are prone to occur

Method used

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  • Gluing method for hot melt adhesive used for production of artificial boards
  • Gluing method for hot melt adhesive used for production of artificial boards
  • Gluing method for hot melt adhesive used for production of artificial boards

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of gluing method that hot melt adhesive is used for wood-based panel production, such as figure 1 shown, including the following steps:

[0031] (1) Add maleic anhydride-grafted modified polyethylene raw material particles into a screw extruder and heat to transform into a molten state into the cast coating mold 3 at a temperature of 200+ / -5°C.

[0032] (2), transport the plate 11 to the lower part of the cast coating mold 3 through the heating and conveying mechanism 21, and at the same time of conveying, the heating and conveying mechanism 21 heats the surface of the glued surface 31 of the plate 11 to 120 °C; the plate 12 is heated and transported The mechanism 22 conveys to the top of the casting coating mold 3 , and at the same time of conveying, the heating conveying mechanism 22 heats the surface of the glued surface 32 of the plate 12 to 120° C.

[0033] (3), the plate 11 passes below the casting coating die 3, and the molten hot melt adhesive is extrude...

Embodiment 2

[0038] A kind of gluing method that hot melt adhesive is used for wood-based panel production, such as figure 2 shown, including the following steps:

[0039] (1) Put the raw material particles of hot melt adhesive into a hot melt adhesive machine or a hot melt tank to heat and transform them into a molten state and send them to the hot melt adhesive spray gun 4. The temperature of the hot melt adhesive spray gun 4 is kept at 220+ / -5°C.

[0040] (2), the plate 11 is transported to the front of the hot melt glue spray gun 4 through the heating conveying mechanism 21, and at the same time of conveying, the heating conveying mechanism 21 heats the surface of the glued surface 31 of the plate 11 to 125 ° C; the plate 12 is heated through the conveying mechanism 22 is transported to the front of the hot melt glue spray gun 4, and at the same time of transport, the heating transport mechanism 22 heats the glued surface 32 to 125°C.

[0041](3) The two gluing surfaces of the plate ...

Embodiment 3

[0045] A hot-melt adhesive is used in the gluing method of wood-based panel production, such as image 3 shown, including the following steps:

[0046] (1) Put the raw material particles of hot melt adhesive into a hot melt adhesive machine or a hot melt tank and heat to transform into a molten state and send it to the hot melt adhesive hot roller 5, keeping the temperature at 200+ / -5°C.

[0047] (2), before the plate 11 is transported to the hot roller 5 of the hot melt adhesive roller coater through the heating conveying mechanism 21, while conveying, the heating conveying mechanism 21 heats the surface of the glued surface 31 of the plate 11 to 120° C.; 12 is transported to the top of the hot melt adhesive hot roller 3 by the heating and conveying mechanism 22, and at the same time of conveying, the heating and conveying mechanism 22 heats the glued surface 32 of the plate 12 to 120°C.

[0048] (3) The plate 11 is coated with molten hot melt adhesive on the glued surface 3...

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PUM

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Abstract

The invention discloses a gluing method for a hot melt adhesive used for production of artificial boards. The gluing method comprises the following steps: a solid material of the hot melt adhesive is heated to be converted into a molten adhesive material; the molten adhesive material is smeared on the surfaces of gluing faces of two boards to be glued in a curtain coating, spraying coating, roller coating, printing coating, airblade coating or frictioning mode; the gluing faces of the two boards are combined and pressed in an allowable exposing time of the hot melt adhesive; and after the two boards are firmly glued, pressure is relieved, so that a gluing and compaction adhering process is finished. The gluing method has the beneficial effects that production efficiency is high; energy consumption is low; besides, the phenomenon that the moisture content of a manufactured glued product is low because of great water evaporation cannot occur, so that stability of the product is good; gluing strength is uniform; and the comprehensive quality of the glued product is good.

Description

[0001] 【Technical field】 [0002] The invention belongs to the technical field of hot-pressing technology for veneering or veneering of plywood, laminated wood, wood-based panels, and solid wood panels, and in particular relates to a gluing method using a hot-melt adhesive for the production of wood-based panels. [0003] 【Background technique】 [0004] The use of hot melt adhesives to produce formaldehyde-free plywood, blockboard and other wood-based panels is an emerging technology. During the use of wood-based panels, many components have to bear weight for a long time. The quality requirements of wood-based panels include static bending strength, elastic modulus, etc. in addition to bonding strength and dipping peeling. Therefore, hot melt adhesives for wood-based panels , with a relatively high melting point. [0005] The authorized announcement number is CN 11033248C, the patent number is ZL 200410011645.1, the authorized announcement number is CN103144152B, the authoriz...

Claims

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Application Information

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IPC IPC(8): B27D1/08
CPCB27D1/08
Inventor 潘学扬
Owner 潘学扬