JP2001334507A - Lignocellulose board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lignocellulose board wherein in order to settle shortage of raw material of a woody board, malt feed is used substitution of woody material being raw material of the woody board or fillers. SOLUTION: Adhesives are applied to malt feed. The raw material is independently, or by being mixed with the woody material, used and thermo-compressed to manufacture the lignocellulose board.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lignocellulosic plate used for interior materials such as floors, walls, furniture and the like, and base materials.

[0002]

In recent years, wood resources, particularly southern seawood resources, have been depleted, and effective use of wood resources and development of materials other than wood resources have been expected to protect the global environment. If fiber materials other than wood materials can be used effectively, it can contribute to solving global environmental problems, resulting in effective use of resources. Until now plywood, particle board, MDF
As a substitute for wood material which is a raw material of a wood board such as (medium fiber board) and OSB, rice waste, bran of wheat flour, waste wood after use of herbaceous matter, and the like have been studied. However, there are problems such as difficulty in stable supply of paddy rice throughout the year due to the harvest time, and uneven adhesion due to the large amount of silica in the paddy rice pad, which makes it difficult for rice paddies to bond with each other.
It was also considered to mix the bran of wheat flour, which is easy to collect, with the wood material to produce a wood board.However, starch granules mixed in the bran have a higher water absorption and swelling ratio than wood, so they were produced by hot pressing. There has been a problem that the surface of the wooden board becomes uneven due to the swelling action due to water absorption, deteriorating the surface properties. Therefore, it is necessary to remove the starch granules mixed in the bran, but there has been a problem that a great deal of cost is required for complete removal. As a waste material that can be produced after the use of herbs, there is bagasse, which is sugarcane squeezed sugar when sugar is produced from sugarcane. There was a problem that it took a lot of transportation cost to bring it to the manufacturing factory.

[0003] In order to solve the above-mentioned problems, the present invention has investigated the following materials as substitutes or fillers for the raw materials of wooden boards. When producing beer, there is a step of squeezing wort, which is a squeezing liquid of barley, which is a raw material of beer, and a large amount of malt feed is discharged after squeezing the wort. The amount of emission is about 100 t / day (dry state) per factory, and the currently discharged malt feed is processed and used as feed for livestock and fertilizer for horticulture. It was examined whether this malt feed can be used as a substitute or a filler for the raw material of the wooden board.

[0004] The mixed dispersion of the malt feed and the wood material such as wood fragments and wood fibers is carried out by particle board or MDF.
Such a method can be carried out by using a mixing and dispersing apparatus used in the production of a wooden board or the like, or by introducing the wood fragments or the wood fibers during the movement. Although the conditions for slightly refining and fibrillating the malt feed are slightly different from those for refining and fibrillating the wood material, the malt feed can be carried out using a general pulverizing or fibrillating device. The lamination of the raw materials required at the time of molding can be performed without any problem whether the raw material is only the malt feed or the case where the malt feed is used as a filler for the wooden material. Regarding the bonding between the malt feeds or the malt feed and the wood material, any type of adhesive can be used for bonding.

[0005] The amount of malt feed discharged from a beer factory is about 100 t / day (dry state) per factory, which is a sufficient amount to be used as a substitute or a filler for wood board. Also, the price is a price that can be sufficiently used as a substitute or a filler for the raw material of the wooden board.

[0006] The present invention is intended to protect a forest, which is one of the global environments, and to solve the shortage of raw materials of a wooden board caused by protecting the forest. It is an object of the present invention to provide a lignocellulosic plate using a malt feed.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a lignocellulosic plate formed by mixing a malt feed discharged in a barley squeezing step in beer production with an adhesive and hot-pressing the mixture. A lignocellulose plate obtained by mixing a malt feed and an adhesive with a wood material used as a raw material of the wood plate and hot-pressing the same is defined as the invention of claim 2, and A lignocellulose plate obtained by mixing a malt feed and an adhesive with a wood material used as a raw material and hot-pressing the mixture is defined as the invention of claim 3, and a wood material used as a raw material for an inner layer portion of the wood plate is supplied with a malt feed material. A lignocellulosic plate mixed with an adhesive and hot-pressed is an invention of claim 4.

Hereinafter, the present invention will be described in detail. Malt feed delivered from a beer factory has a moisture content of 200 to 3
Since it is as high as 00%, it is dried to 3 to 10% by a dryer. 1
If it exceeds 0%, there is a drawback that puncturing occurs in the hot-pressing step in the production of the product, and if it is less than 3%, drying cost and drying time are required. If it exceeds 10% or less than 3%, the resulting lignocellulosic plate will have a high or low moisture content, and its dimensions will change greatly due to the effects of water and moisture during use, causing warpage and twisting. Occurs.

When a malt feed is used as a raw material of a lignocellulosic plate in a state of being refined or fiberized, the malt feed is made using a refiner or a fiberizing apparatus used in the production of particle board, MDF or the like. The feed is crushed and granulated. When using malt feed as a filler for wood board, feed the malt feed into the mixing and dispersing equipment used in particle boards and MDF, etc., or feed the malt feed while moving wood fragments or wood fibers. Add and mix and disperse. The mixing amount of the malt feed may be any ratio to the wood material to be mixed.

[0010] The application of the adhesive to the malt feed or the wooden material is performed using an application device used for a particle board, an MDF or the like. The coating amount is preferably 6 to 13% by weight (resin solid content ratio). If the amount of coating is too large, the manufactured product will be provided with an unnecessarily high adhesive performance, and the cost of the adhesive will increase. If the amount is too small, the adhesive performance may be deteriorated and peeling may occur.

In order to set the emission amount of formaldehyde to E0 defined by the JIS standard, the molar ratio of the adhesive may be determined as follows. -Urea, modified urea formaldehyde resin adhesive, molar ratio of 1.3 or less-Melamine, modified melamine formaldehyde resin adhesive, molar ratio of 1.65 or less-Phenol, modified phenol formaldehyde resin adhesive, molar ratio of 2.2 or less To produce a lower product, an isocyanate-based adhesive may be used.

[0012] Only the malt feed or a wood material in which the malt feed is mixed and dispersed is laminated. In the case of a single layer, the raw materials are laminated without considering the size of the raw materials, and in the case of a three-layer or multilayer structure, the raw materials having a small size are made into a surface layer, and the raw materials having a coarse size are made into an inner layer.

The laminated malt feed alone or the wood material in which the malt feed is mixed and dispersed is sandwiched between hot plates. The pressure is 20 to 30 kg / cm 2, and the temperature and time are appropriately determined depending on the type of the adhesive used and the thickness of the product. After hot pressing, the surface of the lignocellulosic plate is polished if necessary.

[0014]

Example 1 A urea resin adhesive having a molar ratio of 1.1 was added to a malt feed having a water content of 5% by mixing with a mixer so that a resin solid content ratio of 12.5% by weight was used for a surface layer and a urea resin adhesive was used for an inner layer. Was uniformly applied so as to have a resin solid content ratio of 8.5% by weight to obtain a raw material for an inner surface layer. Thickness 1 using this raw material
2mm, density 0.72g / cm3, temperature 1
A lignocellulosic plate was prepared by hot pressing at 60 ° C. and a pressure of 25 kg / cm 2 for 3.5 minutes.

[0015]

Example 2 A malt feed having a water content of 5% was used.
A melamine resin adhesive having a molar ratio of 1.6 was uniformly applied by mixing with a mixer to a mixture of 20% by weight in a surface wood material for particle board of No. 1 to obtain a resin solid content ratio of 12.0% by weight. Raw material for surface layer. The water content is 5%
8% by weight solid content ratio of melamine resin adhesive with a molar ratio of 1.3 in a blender with wood material of inner layer for particle board
To obtain a raw material for the inner layer. Using these raw materials, a thickness of 12 mm and a density of 0.72 g /
A lignocellulosic plate was prepared by hot-pressing at a temperature of 165 ° C. and a pressure of 25 kg / cm 2 for 3.5 minutes so as to obtain cm 3.

[0016]

Example 3 A resol adhesive having a molar ratio of 2.1 was added to a surface wood material for particle board having a water content of 5% at a solid content of 12%.
The material was uniformly applied so as to be a weight% to obtain a raw material for a surface layer. Further, a resol resin adhesive having a molar ratio of 2.1 was added to the inner layer raw material in which a malt feed having a water content of 5% was mixed at a weight ratio of 25% with an inner layer wood material for a particle board having a water content of 5% at a solid content ratio of 8. It was uniformly applied so as to be 5% by weight to obtain a raw material for the inner layer. Using these raw materials, thickness 1
2mm, density 0.72g / cm3, temperature 1
A lignocellulosic plate was prepared by hot pressing at 80 ° C. and a pressure of 25 kg / cm 2 for 4.0 minutes.

[0017]

Example 4 A self-emulsifying isocyanate (MDI) adhesive was applied to a malt feed having a water content of 7% so as to have a resin solid content ratio of 7% by weight for the surface layer, and a resin solid content ratio of 6% for the inner layer. The adhesive was uniformly applied so as to be in a weight% to obtain a raw material for the surface inner layer. 12m thick using this raw material
m and a temperature of 160 to obtain a density of 0.72 g / cm3.
A lignocellulosic plate was prepared by hot pressing at 25 ° C. and a pressure of 25 kg / cm 2 for 3.5 minutes.

[0018]

Comparative Example A urea resin adhesive having a molar ratio of 1.1 was mixed with the wood material for particle board having a water content of 5% used in the examples so that the molar ratio of the urea resin was 12% by weight for the surface layer. For the inner layer, an adhesive was uniformly applied so as to have a resin solid content ratio of 8% by weight to obtain a raw material for the inner layer. Using this raw material, thickness 12mm, density 0.72g / c
A verticle board was prepared by applying heat and pressure at 160 ° C. and a pressure of 25 kg / cm 2 for 3.5 minutes so as to obtain m 3.

[0019]

Table 1 Performance of products made in Examples 1-4 and Comparative Examples Test method The test was performed using JIS A5908 particle board. As can be seen from the table, no problem in physical properties was observed when malt feed was used as a raw material for lignocellulosic plates.

[0020]

According to the present invention, a wood material used as a raw material of a wooden board is replaced with a malt feed, or a wood material (a surface layer, an inner layer, or both) of a raw material is used as a filler. By manufacturing lignocellulosic boards, it is possible to effectively use wood resources. In addition, since malt feed discharged from beer factories in large quantities is used, there is an effect that raw materials for lignocellulosic plates can be stably obtained.

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Claims (4)

[Claims] 1. A lignocellulosic plate formed by mixing a malt feed discharged in a barley squeezing step in beer production and an adhesive and hot-press molding. 2. A lignocellulosic board obtained by mixing a wood material used as a raw material of the wood board with a malt feed and an adhesive and hot-press molding. 3. A lignocellulosic plate obtained by mixing a malt feed and an adhesive with a wooden material used as a raw material of a surface layer portion of the wooden plate and hot-press molding. 4. A lignocellulosic plate obtained by mixing a malt feed and an adhesive with a wooden material used as a raw material for an inner layer portion of the wooden plate and hot pressing the mixture.