WO2010130096A1

WO2010130096A1 - Use of plant powder and product containing same

Info

Publication number: WO2010130096A1
Application number: PCT/CN2009/071799
Authority: WO
Inventors: 高宏; 王晶; 张力明; 帕利托夫⋅阿内特里⋅A; 维克托洛甫娜⋅古里亚茨莫娃⋅奥尔佳; 彼得洛维奇⋅朱迪诺夫⋅弗拉迪斯拉夫; 伊万诺维奇⋅拉莫夫斯基⋅奥莱格; 扎哈洛维奇⋅拉雅霍夫⋅尼古拉
Original assignee: 嘉兴市禾森建材有限公司
Priority date: 2009-05-14
Filing date: 2009-05-14
Publication date: 2010-11-18

Abstract

Use of a plant powder and a product containing same. The plant powder is from plant parts containing lignin/cellulose/hemicellulose/and/or amorphous silica, wherein the percentage of particles with particle size less than 200 micrometers is at least 10% of the total weight of all the particles. The plant powder acts as an adhesive in wood board preparation.

Description

Use of plant powder and article comprising the same

The invention relates to the use of plant powders and to articles comprising the plant powder. Background technique

Currently, there are a variety of wood-based panels and non-wood plant fiber panels on the market. With the increasing tension of wood resources, non-wood plant fiber wood-based panels have gradually become a research hotspot. For example, Zhao Linbo (Zhao Linbo, Technical History of Rice Shell Development, Journal of Northeast Forestry University, Vol. 33, No. 3, p83-84) pointed out that various agricultural and sideline products can be used as substitute raw materials for wood-based panels, and the key points are introduced. The technology for producing wood-based panels using rice husks is at various stages of development at home and abroad. Cheng Xunyi (Chengxun, Rice Shell Production Technology, Southern Agricultural Machinery, 2002.2, p26) introduced a technique for producing rice husks: crushing and grinding rice husks into 40 mesh by a pulverizer and a grinder; The shredded rice husk is mixed with an adhesive, a curing agent, a flame retardant, etc., and after being subjected to a process such as paving, hot pressing, etc., a rice hull plate is obtained, which can be used as a wallboard, a ceiling, or the like.

A common feature in wood-based panels or in non-wood plant fiber panels is the addition of a wide variety of binders, especially organic binders such as phenolic resins, urea-formaldehyde resins and isocyanate resins. . As the price of oil continues to rise, the prices of various chemical raw materials derived from petroleum products also rise. Moreover, these organic binders contain more or less chemical components harmful to humans, such as volatile organic compounds such as furfural, aromatic substances, and the like. During use, the harmful chemical components contained in these wood-based panels will be released, pollute the environment, and seriously endanger human health. As people's requirements for the living environment and their own health improve, there is no need for chemical contamination of the office supplies and household products used. Therefore, the search for natural, non-polluting alternative binders has become a trend.

In addition, China is a large country of forestry production and agricultural production. The processing of various forestry and agricultural products produces a large amount of processing residues, such as bark, sawdust, straw, corn cob, chaff, and bagasse. Although there are already some ways to use these processing residues, there are still a large number of straws, chaffs and corn cobs that are used in the field for direct incineration every year. This incineration also caused serious air pollution. Therefore, there is a need for a method that can utilize these processing residues in large quantities without contamination. Summary of the invention

It is an object of the present invention to provide new uses for pure natural, non-polluting plant powders and articles containing the vegetable powders, more particularly sheets.

In a first aspect of the present application, there is provided the use of a vegetable powder as a binder, wherein the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the plant Particles having a size below 200 microns in the powder comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

%.

In a preferred embodiment of the first aspect of the present application, the particles of the plant powder having a size of 150 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, of the total weight of the total particles. Most preferably at least 90%; further preferably the particles of the plant powder having a size of 100 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles. More preferably, the particles of the plant powder having a size of 80 μm or less account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles; more preferably The particles of the plant powder having a size of 50 microns or less (for example, 40 microns or less, for example 30 microns or less, for example 25 microns or less, for example 20 microns or less, for example 10 microns or less) account for at least 10%, preferably at least, of the total weight of the total particles. 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%.

In an embodiment of the first aspect of the present application, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of plant skins, plant foliage, processing residues, or combinations thereof . In another embodiment, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, bagasse or combination. In a preferred embodiment of the first aspect of the invention, the chaff is a rice husk.

In an embodiment of the first aspect of the application, the adhesive is a sheet adhesive. In a second aspect of the present application, there is provided the use of a vegetable powder as a binder, wherein the plant powder is derived from a plant rind, a plant leaf, a plant processing residue or a combination thereof, the plant powder having a size of 200 microns or less The particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

In a preferred embodiment of the second aspect of the application, the plant powder has a size of 150 microns The lower particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles; further preferably the particles of the plant powder having a size of less than 100 microns At least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90% of the total weight of all particles; more preferably the particles having a size of 80 microns or less in the plant powder make up the total weight of all particles. At least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90%; more preferably the plant powder has a size of 50 microns or less (e.g., 40 microns or less, such as 30 microns or less) For example, below 25 microns, for example below 20 microns, for example below 10 microns, the particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles. .

In a preferred embodiment of the second aspect of the application, the vegetable powder is derived from bark, sawdust, straw, corn cob, chaff, bagasse or a combination thereof. In a preferred embodiment of the second aspect of the application, the chaff is a rice husk.

In an embodiment of the second aspect of the application, the adhesive is a sheet adhesive. In a third aspect of the present application, there is provided a board comprising a vegetable powder as a binder and optionally other binders, the other binder being present in an amount less than 15% by weight of the board, the plant The powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the particles in the plant powder having a size of 200 microns or less comprise at least 10%, preferably at least 30% of the total weight of the total particles. %, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90%.

In a preferred embodiment of the third aspect of the present application, the particles of the plant powder having a size of 150 microns or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, of the total weight of the total particles. Most preferably at least 90%; further preferably the particles of the plant powder having a size of 100 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles. More preferably, the particles of the plant powder having a size of 80 microns or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90% of the total weight of the total particles; more preferably The particles of the plant powder having a size of 50 microns or less (for example, 40 microns or less, for example 30 microns or less, for example 25 microns or less, for example 20 microns or less, for example 10 microns or less) account for at least 10%, preferably at least, of the total weight of the total particles. 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%.

In an embodiment of the third aspect of the present application, the lignin/cellulose/semi-fiber The plant parts of the elemental and/or amorphous silica are selected from the group consisting of plant husks, plant foliage, processing residues or combinations thereof. In another embodiment, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, bagasse or combination. In a preferred embodiment of the third aspect of the invention, the chaff is a rice husk.

In one embodiment of the third aspect of the present application, the amount of the other binder is less than 10% by weight of the sheet, more preferably less than 5%. In a more preferred embodiment, the sheet of the third aspect of the application is free of other binders.

In an embodiment of the third aspect of the invention, the sheet material further comprises other board material other than the vegetable powder. In an embodiment of the third aspect of the present application, the vegetable powder is at least 5% by weight, preferably at least 10% by weight of the board. /. More preferably, it is at least 20%, at least 30% by weight, at least 40% by weight, and at least 50% by weight. In a fourth aspect of the present application, there is provided a sheet material comprising a vegetable powder as a binder and optionally other binders, the other binder being present in an amount less than 15% by weight of the sheet, wherein the plant powder is derived from a plant sheath, a plant leaf, a plant processing residue or a combination thereof, wherein the plant powder has a particle size of 200 microns or less, at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 10% by weight of the total particles. 70%, most preferably at least 90%.

In a preferred embodiment of the fourth aspect of the present application, the plant powder has a particle size of 150 microns or less, at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, of the total weight of the total particles. Most preferably at least 90%; further preferably the particles of the plant powder having a size of 100 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles. More preferably, the particles of the plant powder having a size of 80 μm or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles; more preferably The particles of the plant powder having a size of 50 micrometers or less (for example, 40 micrometers or less, for example, 30 micrometers or less, for example, 25 micrometers or less, for example, 20 micrometers or less, for example, 10 micrometers or less) account for at least 10%, preferably at least, of the total weight of the total particles. 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%.

In a preferred embodiment of the fourth aspect of the present application, the vegetable powder is derived from bark, sawdust, straw, corn cob, chaff, bagasse or a combination thereof. In a preferred embodiment of the fourth aspect of the invention, the chaff is a rice husk.

In an embodiment of the fourth aspect of the present application, the content of the other binder is less than the weight of the sheet 10%, more preferably less than 5%. In a more preferred embodiment, the sheet of the fourth aspect of the application is free of other binders.

In an embodiment of the fourth aspect of the invention, the sheet further comprises other board materials other than the plant powder. In an embodiment of the fourth aspect of the present application, the vegetable powder is at least 5% by weight, preferably at least 10% by weight of the board. /. More preferably, it is at least 20%, at least 30% by weight, at least 40% by weight, and at least 50% by weight. In a fifth aspect of the present application, there is provided a board comprising a vegetable powder as a binder, wherein the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein The particles of the plant powder having a size of less than 400 mesh account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

%.

In a preferred embodiment of the fifth aspect of the present invention, the particles of the plant powder having a size of 30 micrometers or less (for example, 28 micrometers or less, 25 micrometers or less, 23 micrometers or less, 22 micrometers or less, 21 micrometers or less or less) account for the total weight of the entire particles. At least 10%, preferably at least 30%, more preferably at least 50%, even more preferably at least 70%, and most preferably at least 90%. In another embodiment of the fifth aspect, the plant powder has a size of 20 micrometers or less (for example, 19 micrometers or less, 18 micrometers or less, 17 micrometers or less, 16 nanometers or less, 15 meters or less, 14 nanometers or less, 13 inches). The particles below m, below 12 m, below 11 microns account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles; further preferably Particles having a size of 10 microns or less in the vegetable powder account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles; more preferably the size of the plant powder Particles below 5 microns account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

In an embodiment of the fifth aspect of the present invention, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of plant skins, plant foliage, processing residues, or combinations thereof . In another embodiment, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, bagasse or combination. In a preferred embodiment of the fifth aspect of the invention, the chaff is a rice husk.

In an embodiment of the fifth aspect of the invention, the sheet material further comprises other board material other than the plant powder. In an embodiment of the fifth aspect of the present invention, the plant powder is The weight of the sheet is at least 5% by weight, preferably at least 10% by weight, more preferably at least 20%, at least 30% by weight, at least 40% by weight, and at least 50% by weight. In a sixth aspect of the present application, there is provided a board comprising a vegetable powder as a binder, wherein the plant powder is derived from a plant rind, a plant leaf, a plant processing residue or a combination thereof, the plant powder having a size of less than 400 mesh It is at least 10%, preferably at least 30%, more preferably at least 50%, even more preferably at least 70%, and most preferably at least 90%, based on the total weight of the total particles.

In a preferred embodiment of the sixth aspect of the present invention, the particles of the plant powder having a size of 30 micrometers or less (for example, 28 micrometers or less, 25 micrometers or less, 23 micrometers or less, 22 micrometers or less, 21 micrometers or less or less) account for the total weight of all the particles. At least 10%, preferably at least 30%, more preferably at least 50%, even more preferably at least 70%, and most preferably at least 90%. In another embodiment of the fifth aspect, the plant powder has a size of 20 μm or less (for example, 19 μm or less, 18 μm or less, 17 μm or less, 16 cm or less, 15 μm or less, and 14 nm or less, 13 mils or less, less than 12 mils, and 11 micrometers or less) of the total particles by weight of at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90%; Preferably, the plant powder has a particle size of 10 microns or less, based on at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles; more preferably the plant powder Particles having a median size of 5 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

In a preferred embodiment of the sixth aspect of the invention, the vegetable powder is derived from bark, sawdust, straw, corn cob, chaff, bagasse or a combination thereof. In a preferred embodiment of the sixth aspect of the invention, the chaff is a rice husk.

In an embodiment of the sixth aspect of the invention, the sheet material further comprises other board material other than the plant powder. In an embodiment of the sixth aspect of the invention, the plant powder is at least 5% by weight, preferably at least 10% by weight of the board. /. More preferably, it is at least 20%, at least 30% by weight, at least 40% by weight, and at least 50% by weight. In the sheets of the fifth and sixth aspects of the invention, other binders may or may not be contained. However, in order to obtain a completely environmentally friendly, non-contaminating sheet, the sheets of the fifth and sixth aspects of the invention are preferably free of other binders. In the sheets of the third to sixth aspects of the invention, in addition to the plant powders defined by each, it may contain optional other board materials, such as various plant fibers known in the art for producing wood-based panels. Debris, such as rice husk crumbs and wood chips, such as powders having a maximum particle size of about 40 mesh, such as rice hull powder, which are commonly used in the manufacture of rice hull sheets. In a seventh aspect of the invention, a method of producing a sheet material according to the third to sixth aspects of the invention, comprising:

(a) mixing the plant powder with optional other binders and optionally other board materials to form a board mix;

(b) The plate mixture is subjected to paving and hot press forming to obtain the plate.

In one embodiment of the seventh aspect of the present application, the vegetable powder is at least 5 by weight based on the weight of the board mix. /. Preferably, it is at least 10% by weight, more preferably at least 20%, at least 30% by weight, at least 40% by weight, and at least 50% by weight.

In another embodiment, the pressure is from 1 to 20 MPa and from 20 to 250 °C in hot press forming.

In still another embodiment, the heat setting, the mold release, and the like are also performed after the hot press forming. In still another embodiment, the pressure is from 1 to 20 MPa and the temperature is from 100 to 250 ° C, preferably from 160 to 210 ° C, during the heat setting. In a preferred embodiment, the incubation is carried out for 3-20 minutes. Other objects and aspects of the present invention will become apparent from the following detailed description. It is to be understood that the following detailed description of the preferred embodiments of the invention Make various changes and changes. DRAWINGS

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a scanning electron microscope (SEM) photograph of a conventional high-density plate section of the prior art, in which Fig. 1(a) has a magnification of 100 times and Fig. 1(b) has a magnification of 500 times.

2 is a SEM photograph of a section of a rice hull plate without other binders produced in Example 7 of the present application, wherein the magnification of FIG. 2(a) is 100 times, and the magnification of FIG. 2(b) is 500. Times.

3 is a SEM photograph of the surface of a rice hull plate without other binders produced in Example 7 of the present application, wherein the magnification of FIG. 3(a) is 60 times, and the magnification of FIG. 3(b) is 1000 times. . Figure 4 is a photograph of a rice hull plate without other binders produced in Example 8 of the present application.

Figure 5 is a photograph of a rice hull plate without other binders produced in Example 9 of the present application. detailed description

In the present application, the term "crust" includes shells of various cereal plants, including but not limited to: for example, rice hulls, such as shells of various wild rice, hybrid rice, etc.; wheat hulls, such as barley, wheat, oats, etc. Shell; shell of millet; shell of sorghum and so on.

The term "plant skin" includes the outer skin of various plants, such as the bark of trees, such as the bark of fruit trees such as apple trees, pear trees, peach trees, vines, and cherry trees.

The term "straw" refers to the portion of the stem of the stem after harvesting of the crop seed. In the present application, the straw includes straw and by-products of rice, wheat, rape, corn and the like.

The term "sawdust" refers to the last wood chips of the tree itself that are scattered from the trees during the wood processing, usually the scraps produced by the sawn wood. In the present application, there is no particular limitation on the type of tree in which the sawdust is produced, and sawdust produced from any tree, such as sawdust of wood, wood, fir, or the like, can be used.

The term "corn cob" refers to the core remaining after the corn kernels are removed.

The term "bagasse" refers to the residue of sugar cane sugar, which is an important by-product of the sugar cane sugar industry. In the present application, the residue after sugar cane can be directly used, and the cane pulp can be used.

The term "plant foliage" refers to the branches and leaves of a plant, and there is no particular restriction on the species of the plant.

In the present application, the term "derived from" means obtained from plants, in particular parts of plants, such as mechanical milling. For example, "from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica" means that the plant powder can be derived from lignin/cellulose/hemicellulose and/or amorphous The plant parts of the silica are processed, for example mechanically.

The term "plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica" means a plant part comprising lignin, a plant part comprising cellulose, a plant part comprising hemicellulose, comprising none A plant part of the shaped silica, or a plant part comprising any combination of lignin, cellulose, hemicellulose, and amorphous silica.

The term "other binder" refers to various materials commonly used in the prior art as binders, including inorganic binders, organic binders, and the like, particularly various organic binders. For example, in wood-based panels, etc. In the field, common inorganic binders are water-soluble and water-insoluble salts such as water glass, sodium sulfate, sulfuric acid 4 bow, potassium dichromate, etc., and the like; common organic binders include phenolic resins. , uric acid tree, polyurethane resin, melamine resin, epoxy resin, α-cyanoacrylate adhesive, anaerobic adhesive, modified acrylate adhesive, unsaturated polyester adhesive, neoprene adhesive, PVC plastisol, and many more.

The term "does not contain other binders" means that the board does not contain any of the above-mentioned other binders which are intentionally added.

The term "sheet" refers to various wood-based panels, including fiberboard and particleboard. In general, fiberboard refers to a wood-based panel made of wood or vegetable fiber as a main raw material, mechanically separated into individual fibers, added with an additive to form a slab, and combined by hot pressing and an adhesive. Fiberboard can be divided into: wood fiberboard, non-wood fiberboard; according to the treatment method can be divided into: special hard fiberboard, ordinary hard fiberboard; according to the weight can be divided into: hard fiberboard (also known as high-density fiberboard), semi-hard Fibrous fiberboard (also known as medium density fiberboard), soft fibreboard (also known as low density fiberboard). For example, particleboard, also known as particle board, refers to the cutting of wood processing residues, small diameter wood, wood chips, etc. into pieces of certain specifications, dried, mixed with rubber, hardener, water repellent, etc., at a certain temperature, A wood-based panel pressed under pressure.

The term "other board materials" includes various fiber materials known in the art for making wood-based panels, including but not limited to: for example, wood, wood chips, rice husks, corn stalk fibers (see Chinese invention patent application CN1316318A), long Stem fiber plants (eg, rough, rice straw, bagasse, kenaf, etc.) (see Chinese invention patent application CN1159980A), coconut shell (see WO2004/050317) and the like. In the present application, the range of other board materials does not include the other binders described above. In a first aspect of the present application, there is provided the use of a vegetable powder as a binder, wherein the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the plant powder Particles having a median size of 200 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90%, by total weight of the total particles.

The inventors of the present application unexpectedly found that, as confirmed by the following examples, the above plant powder has an adhesive function similar to that of a conventional organic binder at the time of hot pressing, and can be used in various fields such as a wood-based panel. The inventors of the present invention presume that the possible mechanism is: Generally, plant cells have a diameter on the order of tens to hundreds of micrometers, and when the plant part is pulverized to a particle size sufficiently small, a powder of about 1-10 micrometers, the plant cell wall is broken, thereby Release some of these ingredients, which may have an adhesive effect, from The resulting product is given a gluing function during hot pressing. Further, when the raw material is pulverized to a particle size of 1 - 10 μm, surface hydroxyl groups are increased due to mechanical activation, so that a polycondensation reaction between hydroxyl groups occurs during hot pressing, and the powder has an adhesive function. And further discovering that the plant part derived from the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica and having a size of 200 microns or less occupies at least 10% of the total weight of the total particles of the plant powder is hot It has an adhesive function similar to a conventional organic binder when pressed. Of course, although the present application has been explained based on the above mechanism, those skilled in the art should understand that the present application is not intended to be limited by the above mechanism.

As described above, in the prior art, when preparing wood-based panels from various plant materials such as wood chips, crushed rice husks, bagasse, etc., it is usually necessary to use a sufficient amount of an organic or inorganic binder to make these plants. The raw materials are bonded to a formed sheet. In the prior art, although the cementation function of these plant materials during hot pressing has not been found, a sufficient amount of organic or inorganic binder must be used to bond the various plant materials. .

However, according to the first aspect of the present invention, since the above-mentioned vegetable powder itself can function as a binder, various articles such as a molded sheet and the like can be prepared without using these organic or inorganic binders.

The above plant powder can be used alone as a binder, as needed, for preparing various articles such as formed sheets. In other words, in the preparation of various articles such as formed sheets, only the above plant powder is used as the binder.

The above plant powders can also be used in combination with other binders for the preparation of various articles such as formed sheets. In other words, in the preparation of various articles such as formed sheets, in addition to the use of the above-mentioned vegetable powder as a binder, other binders such as various organic binders such as phenol resin, urethane resin and the like are also used. When used, the adhesion of the above plant powder to the above-mentioned other binder does not adversely affect each other. However, as mentioned above, these organic binders contain more or less chemical substances harmful to the human body, such as volatile organic compounds such as furfural, aromatic substances and the like. During use, these harmful chemical components will be released, pollute the environment, and seriously endanger human health.

Therefore, in one embodiment of the first aspect of the present application, the above plant powder is used alone as a binder for preparing various articles such as a formed sheet. The plant powder is derived from plants and belongs to the class of natural, non-polluting green binders. When used alone, it can produce non-polluting green products, such as sheets with a formaldehyde content of substantially zero.

In general, the smaller the particle size of the powder, the better the performance of the vegetable powder as a binder. however, Too small a particle size will increase the processing cost. In one embodiment, the particles of the plant powder having a size of 150 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles; Further preferably, the plant powder has a particle size of 100 microns or less, based on the total weight of the total particles of at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%; more preferably the plant The particles having a size of 80 microns or less in the powder account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles; more preferably the size of the plant powder is Particles below 50 microns (e.g. below 40 microns, such as below 30 microns, such as below 25 microns, such as below 20 microns) comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 10% of the total weight of the total particles. 70%, most preferably at least 90%.

The present application is not particularly limited to a plant portion containing lignin/cellulose/hemicellulose and/or amorphous silica as long as the portion can be processed to obtain a plant powder required for the present application. In general, it is preferred that the plant powder of the present application is derived from plant hulls, plant foliage, processing residues or combinations thereof. The processing residues of many agricultural by-products belong to plant parts containing lignin/cellulose/hemicellulose and/or amorphous silica. Accordingly, the present invention can utilize these processing residues to produce the vegetable gum powder of the present invention, which both increases the utility of these processing residues and reduces the added cost and environmental impact of disposal of these processing residues. Pollution. In another embodiment, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, bagasse or combination. At this time, bark, sawdust, straw, corn cob, chaff, and bagasse can all be in the form of processing residues. In another embodiment, the chaff is preferably a rice husk.

In the present application, the plant powder may be a single source plant powder, for example, one derived from rice hulls, bark, straw, and the like. It may also be a combination of plant powders from different sources, such as a combination of plant powder derived from rice hulls and plant powder derived from bark.

Preferably, in one embodiment of the first aspect of the present application, the vegetable powder is used as a sheet adhesive.

In the present application, the method for producing the above plant powder comprises pulverizing a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica. In general, in the present application, grinding can be carried out using a grinder to prepare a plant powder. One skilled in the art can select a suitable milling procedure, such as a single milling process, multiple milling processes, and the like, depending on the particle size requirements of the desired plant powder.

For plant powders with a smaller particle size, in order to increase production efficiency, the grinding and pulverizing method generally includes Two steps: coarse crushing and deep grinding. The coarse pulverization is to pulverize a plant part, such as a processing residue, containing lignin/cellulose/hemicellulose and/or amorphous silica into coarse particles by a pulverizer, a general grinder or the like, for example, a particle size of about 40 mesh to several Ten millimeters of particles; then, the coarse particles are added to a depth mill for deep grinding to obtain a desired particle size range, i.e., a plant powder can be obtained. Of course, the ground comminution can also be carried out directly by deep grinding of plant parts, such as processing residues, comprising lignin/cellulose/hemicellulose and/or amorphous silica. However, it is preferred to carry out the two-step method described above. For raw materials such as straw, which are long in length, it may be necessary to pre-cut them to a length suitable for a pulverizer (rough pulverizer or fine pulverizer) and then grind them in a pulverizer. However, depending on the type of the pulverizer used, the above pre-cut processing may not be performed. When the grinding is carried out, it is preferred that the coarse particles have a water content of not more than 20%, more preferably not more than 10%. The coarse pulverization and deep grinding can be carried out in any machine capable of bringing a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, for example, a processing residue, to a desired particle size, for example, using Taian The straw pulverizer or rice husk pulverizer produced by Taifeng Agriculture and Animal Husbandry Machinery Factory in Daiyue District of the city is coarsely pulverized. It can also be coarsely ground using a wood powder machine produced by Zhengzhou Zhongyuan Powder Equipment Factory. Deep grinding can be used, for example, AGO series ball mills produced by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences, for example, AGO-2, AGO-3, AGO-5, etc., and CZJ produced by Zhejiang Fengli Crushing Equipment Co., Ltd. Self-grinding type superfine pulverizer and so on. The conditions for coarse comminution and deep grinding are not critical and depend on the machinery used. Those skilled in the art can determine reasonable operating conditions based on the machinery selected. In a second aspect of the present application, there is provided the use of a plant powder as a binder, wherein the plant powder is derived from a plant rind, a plant leaf, a plant processing residue or a combination thereof, the plant powder having a size of 20 (H meters or less) The particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90%, based on the total weight of the total particles.

Similar to the first aspect of the present application, the vegetable powder of the second aspect also has an adhesive function similar to that of a conventional organic binder, and can be used as a binder. The possible principles are as described above.

Similar to the first aspect, in order to make the performance of the vegetable powder as a binder better, in a preferred embodiment of the second aspect of the present application, the particles having a size of 150 μm or less in the plant powder account for at least 10 of the total weight of the total particles. %, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%; further preferably the particles in the plant powder having a size of 100 microns or less comprise at least 10%, preferably at least the total weight of the total particles. 30%, more preferably at least 50%, more Preferably at least 70%, most preferably at least 90%; more preferably the particles in the plant powder having a size of 80 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70% of the total weight of the total particles. Most preferably at least 90%; more preferably, the particles in the plant powder having a size of 50 microns or less (for example, 40 microns or less, for example, 30 microns or less, such as 25 microns or less, for example, 20 microns or less) account for at least 10% of the total weight of the total particles. Preferably, it is at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90%.

Preferably, in one embodiment of the second aspect of the present application, the vegetable powder is used as a sheet adhesive.

Similar to the first aspect, the method for preparing the above plant powder comprises pulverizing plant skin, plant foliage, processing residue or a combination thereof. In general, in the present application, grinding can be carried out using a grinder to prepare a plant powder. One skilled in the art can select a suitable milling procedure based on the particle size requirements of the desired plant powder, such as a single milling process, multiple milling processes, and the like.

Similar to the first aspect, for plant powders having a smaller particle size, the grinding and pulverizing method generally comprises two steps: coarse pulverization and deep grinding. The coarse pulverization is to pulverize the plant husk, the plant leaves, the processing residue or a combination thereof into coarse particles by a pulverizer, a general grinder or the like, for example, particles having a particle size of about 40 mesh to several tens of millimeters; and then, the coarse particles are added thereto. The deep grinding is carried out in a depth grinder to obtain a desired particle size range, that is, the plant powder of the second aspect of the invention can be obtained. Of course, the grinding and pulverization can also be carried out directly by using deep grinding of the plant skin, plant foliage, processing residue or a combination thereof. However, it is preferred to carry out the two-step method described above. For raw materials such as straw, which are long in length, it may be necessary to pre-cut them to a length suitable for a pulverizer (rough pulverizer or fine pulverizer) and then grind them in a pulverizer. However, depending on the type of the pulverizer used, the above pre-cut processing may not be performed. When grinding is carried out, it is preferred that the coarse particles have a water content of not more than 20% by weight, more preferably not more than 10% by weight. The coarse pulverization and deep grinding can be carried out in any machine capable of achieving the desired particle size of the plant skin, plant foliage, processing residue or a combination thereof, for example, straw which can be produced by Taifeng Farming and Animal Husbandry Machinery of Daiyue District, Tai'an City. The pulverizer or the rice husk mill is used for coarse pulverization. It can also be coarsely ground using a wood powder machine produced by Zhengzhou Zhongyuan Powder Equipment Factory. Deep grinding can be used. For example, AGO series ball mills produced by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences, for example, include AGO-2, AGO-3, AGO-5, etc., and Zhejiang Fengli Crushing Equipment Co., Ltd. The CZJ self-grinding superfine pulverizer produced by the company. The conditions for coarse comminution and deep grinding are not critical and depend on the machinery used. Those skilled in the art can determine reasonable operating conditions based on the machinery selected. In general, the conditions required for coarse comminution are determined by the feed conditions for deep comminution. The requirements of the deep pulverizing machine for feeding are achieved by coarse pulverization. In a third aspect of the present application, there is provided a sheet material comprising a vegetable powder as a binder and optionally other binders, the other binder being present in an amount less than 15% by weight of the sheet, wherein the vegetable powder Derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein particles of the plant powder having a size below 200 microns account for at least 10%, preferably at least 30% of the total weight of the total particles More preferably, it is at least 50%, more preferably at least 70%, and most preferably at least 90%.

As described in the first aspect of the present application, the plant powder has an adhesive function similar to that of a conventional organic binder when hot pressed, and can be used in various fields such as wood-based panels. Moreover, since the above-mentioned vegetable powder itself can function as a binder, it is possible to prepare various articles such as a formed plate material without using these organic or inorganic binders.

The sheet of the third aspect of the present application may contain a certain amount of the optional other binder described above, however, the content of these other binders may be substantially reduced relative to existing artificial panels, such that those skilled in the art will recognize It is not sufficient to pass the sheet material to the bond forming only by such a low content of other binder. In general, in the conventional wood-based panel, the content of the binder is usually from 15 to 40% by weight. In the present application, for example, in one embodiment, the content of the other binder is less than 15%, preferably less than 10%, more preferably less than 5%, still more preferably less than 2%, such as less than 1 by weight of the sheet. %.

However, in one embodiment of the third aspect of the present application, in view of environmental, health, and the like, the sheet material does not contain any other binder that is intentionally added, and only contains the vegetable powder as a binder. Since the plant powder is derived from plants and belongs to the natural, non-polluting class of green binders, the sheet is a non-polluting green product, for example, the formaldehyde content can reach zero.

As described above, the smaller the particle size of the vegetable powder, the better the bonding property. In a preferred embodiment of the third aspect of the present application, the particles of the plant powder having a size of 150 microns or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, based on the total weight of the total particles. Most preferably at least 90%; further preferably the particles of the plant powder having a size of 100 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably up to the total weight of the total particles. 70% less, most preferably at least 90%; more preferably the particles in the plant powder having a size of 80 microns or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, based on the total weight of the total particles. Most preferably at least 90%; more preferably, the particles in the plant powder having a size of 50 microns or less (for example, 40 microns or less, such as 30 microns or less, such as 25 microns or less, for example, 20 microns or less) account for at least 10% of the total weight of the total particles, It is preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90%.

In an embodiment of the third aspect of the present application, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of plant skins, plant foliage, processing residues, or combinations thereof . In another embodiment, the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, bagasse or combination. In a preferred embodiment of the third aspect of the invention, the chaff is a rice husk.

In the present application, the plant powder may be a single source plant powder, for example, one derived from rice hulls, bark, straw, and the like. The vegetable powder may also be a combination of plant powders of different origin, such as a combination of plant powder derived from rice hulls and plant powder derived from bark.

In an embodiment of the third aspect of the invention, the sheet further comprises other board materials other than the vegetable powder and other binders. However, in order to obtain a sheet having good properties such as strength and modulus, in an embodiment of the third aspect of the present application, the plant powder is at least 5 by weight of the sheet. /. Preferably, it is at least 10% by weight, more preferably at least 20%, at least 30% by weight, at least 40% by weight, and at least 50% by weight.

In the board of the third aspect of the present application, the plant powder can be used as a binder together with other board materials, and since the plant powder itself contains a cellulose component, it can be used alone as a raw material for manufacturing a board. The board is manufactured, i.e., the plant powder can comprise 100% by weight of the board. This is a very unique advantage of this plate. In a fourth aspect of the present application, there is provided a sheet material comprising a vegetable powder as a binder and optionally other binders, the other binder being present in an amount less than 15% by weight of the sheet, wherein the plant powder is derived from a plant sheath, a plant leaf, a plant processing residue or a combination thereof, wherein the plant powder has a particle size of 200 microns or less, at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 10% by weight of the total particles. 70%, most preferably at least 90%.

The sheet of the fourth aspect of the present application may also contain a certain amount of the optional other binder described above, but the content of these other binders may be greatly reduced relative to the existing artificial board, so that Those skilled in the art will recognize that it is not sufficient to bond the sheet stock to only the other binders in this amount. For example, in one embodiment, the amount of other binder is less than 15%, preferably less than 10%, more preferably less than 5%, still more preferably less than 2%, such as less than 1% by weight of the board.

Similar to the sheet material of the third aspect of the present application, in an embodiment of the fourth aspect of the present application, the sheet material does not contain any other binder intentionally added, and only contains the plant powder as the environment. Adhesive. Since the plant powder is derived from plants and belongs to the natural, non-contaminated green binder category, the sheet is a non-polluting green product, for example, the tannic acid content can reach zero.

As described above, the smaller the particle size of the vegetable powder, the better the bonding property. In a preferred embodiment of the fourth aspect of the present application, the particles having a size of 150 microns or less in the plant powder comprise at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, based on the total weight of the total particles. Most preferably at least 90%; further preferably the particles of the plant powder having a size of 100 microns or less comprise at least 10%, preferably at least 30 °/ of the total weight of the total particles. More preferably, it is at least 50%, more preferably at least 70%, and most preferably at least 90%; more preferably, the particles in the plant powder having a size of 80 microns or less account for at least 10%, preferably at least 30%, more preferably at least 30% of the total weight of the total particles. 50%, more preferably at least 70%, most preferably at least 90%; more preferably the particles of the plant powder having a size of 50 microns or less (for example, 40 microns or less, for example, 30 microns or less, for example, 25 microns or less, for example, 20 microns or less) At least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

In an embodiment of the fourth aspect of the present application, the sheet material further comprises other board material other than the vegetable powder. However, in order to obtain a sheet having good properties such as strength and modulus, in an embodiment of the fourth aspect of the present application, the plant powder is at least 5 parts by weight of the sheet.

%, preferably at least 10% by weight. /. More preferably, it is at least 20%, at least 30% by weight, at least 40% by weight, and at least 50% by weight.

Of course, since the plant powder itself contains a cellulose component, it can also be used alone as a system. The raw material of the board is used to manufacture the board, that is, the plant powder can account for 100% of the weight of the board. In a fifth aspect of the present application, there is provided a board comprising a vegetable powder as a binder, wherein the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein The particles of the plant powder having a size of less than 400 mesh account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles.

%.

In the prior art, there is no plant powder of the fifth aspect of the present application, that is, the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the plant powder is The particles having a size of less than 400 mesh account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

The plant powder can be prepared by a method similar to the plant powder of the first aspect, comprising pulverizing a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica. In general, in the present application, a grinding machine can be used for grinding to prepare a plant powder. One skilled in the art can select a suitable milling procedure, such as a single milling process, multiple milling processes, and the like, depending on the particle size requirements of the desired plant powder.

In order to increase production efficiency, the grinding and pulverizing method generally comprises two steps: coarse pulverization and deep grinding. The coarse pulverization is to pulverize a plant part, such as a processing residue, containing lignin/cellulose/hemicellulose and/or amorphous silica into coarse particles by a pulverizer, a general grinder or the like, for example, a particle size of about 40 mesh to several Ten millimeters of particles; then, the coarse particles are added to a depth mill for deep grinding to obtain a desired particle size range, i.e., a plant powder can be obtained. Of course, the ground comminution can also be carried out by directly grinding a plant part, such as a processing residue, comprising lignin/cellulose/hemicellulose and/or amorphous silica. However, it is preferred to carry out the above two-step method. For raw materials such as straw, which are long in length, it may be necessary to pre-cut them to a length suitable for a pulverizer (rough pulverizer or fine pulverizer) and then grind them in a pulverizer. However, depending on the type of the pulverizer used, the above pre-cut processing may not be performed. When the grinding is carried out, it is preferred that the coarse particles have a water content of not more than 20%, more preferably not more than 10%. The coarse pulverization and deep grinding can be carried out in any machine capable of bringing a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, for example, a processing residue, to a desired particle size, for example, using Taian The straw pulverizer or rice husk pulverizer produced by Taifeng Agriculture and Animal Husbandry Machinery Factory in Daiyue District of the city is coarsely pulverized. It can also be coarsely ground using a wood powder machine produced by Zhengzhou Zhongyuan Powder Equipment Factory. Deep grinding can be used, for example, the Russian Academy of Sciences The AGO series ball mills produced by the Institute of Mechanical Chemistry, for example, include AGO-2, AGO-3, AGO-5, etc., as well as CZJ self-grinding superfine pulverizers produced by Zhejiang Fengli Crushing Equipment Co., Ltd., and the like. The conditions for coarse comminution and deep grinding are not critical and depend on the machinery used. Those skilled in the art can determine reasonable operating conditions based on the machinery selected. In general, the conditions required for coarse comminution are determined by the feed conditions for deep comminution. The requirements of the deep pulverizing machine for feeding are achieved by coarse pulverization.

In a preferred embodiment of the fifth aspect of the present invention, the particles of the plant powder having a size of 30 micrometers or less (for example, 28 micrometers or less, 25 micrometers or less, 23 micrometers or less, 22 micrometers or less, 21 micrometers or less or less) account for the total weight of the entire particles. At least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90%. In a preferred embodiment of the fifth aspect of the present invention, the plant powder has a size of 20 or less (for example, 19 meters or less, 18 micrometers or less, 17 micrometers or less, 16 micrometers or less, 15 micrometers or less, 14 micrometers or less, 13 micrometers or less). The particles below, below 12 microns, below 11 microns) comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles; further preferably the plant powder The particles having a median size of 10 microns or less comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles; more preferably the size of the plant powder is 5 The particles below micron account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90% of the total weight of the total particles.

In an embodiment of the fifth aspect of the present invention, as the binder of the sheet material, in addition to the plant powder of the above fifth aspect, the other binder may be contained. For example, the content of these other binders can be greatly reduced relative to existing artificial panels, so that those skilled in the art will recognize that it is not sufficient to bond the sheet stock to only the other binders in this amount. For example, in one embodiment, the amount of other binder is less than 15%, preferably less than 10%, of the weight of the sheet, More preferably less than 5%, more preferably less than 2%, such as less than 1%.

However, in an embodiment of the fifth aspect of the present application, the sheet material does not contain any other binder intentionally added, and only contains the vegetable powder as a binder. Since the plant powder is derived from plants and belongs to the natural, non-polluting class of green binders, the sheet is a non-polluting green product, for example, the formaldehyde content can reach zero.

In an embodiment of the fifth aspect of the invention, the sheet material further comprises other board material other than the vegetable powder. However, in order to obtain a sheet having good properties such as strength and modulus, in an embodiment of the fifth aspect of the present application, the plant powder is at least 5% by weight, preferably at least 10% by weight, more preferably at least 20%, at least 30% by weight, at least 40% by weight, at least 50% by weight.

Of course, since the plant powder itself contains a cellulose component, it can also be used alone as a raw material for the production of a board material, i.e., the plant powder can account for 100% by weight of the board. In a sixth aspect of the present application, there is provided a board comprising a vegetable powder as a binder, wherein the plant powder is derived from a plant rind, a plant leaf, a plant processing residue or a combination thereof, the plant powder having a size of less than 400 mesh It is at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90%, based on the total weight of the total particles.

Similar to the fifth aspect of the present application, in the prior art, there is no plant powder of the sixth aspect of the present application, that is, the plant powder is derived from plant skin, plant foliage, plant processing residue or a combination thereof, and the size of the plant powder The particles less than 400 mesh account for at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90%, by total weight of the total particles.

The plant powder of the sixth aspect of the present application can also be produced by a method similar to the preparation of the plant powder of the fifth aspect of the present application, comprising pulverizing the plant hull, plant foliage, processing residue or a combination thereof. In general, in the present application, grinding can be carried out using a grinder to prepare a plant powder. One skilled in the art can select a suitable milling procedure based on the particle size requirements of the desired plant powder, such as a single milling process, multiple milling processes, and the like.

In order to increase production efficiency, the grinding and pulverizing method generally comprises two steps: coarse pulverization and deep grinding. The coarse pulverization is to pulverize the plant husk, the plant leaves, the processing residue or a combination thereof into coarse particles by a pulverizer, a general grinder or the like, for example, particles having a particle size of about 40 mesh to several tens of millimeters; and then, the coarse particles are added thereto. Deep grinding in a deep mill gives a desired particle size range, i.e., a plant powder can be obtained. Of course, the grinding and pulverizing can also be used to plant the skin, plant leaves, processing residues or The combination is carried out directly using deep grinding. However, it is preferred to carry out the two-step method described above. For raw materials having a long length such as straw, it may be necessary to pre-cut them into a length suitable for a pulverizer (rough pulverizer or fine pulverizer) and then grind them in a pulverizer. However, depending on the type of the pulverizer used, the above pre-cut processing may not be performed. When grinding is carried out, it is preferred that the coarse particles have a water content of not more than 20% by weight, more preferably not more than 10% by weight. The coarse pulverization and deep grinding can be carried out in any machine capable of achieving the desired particle size of the plant skin, plant foliage, processing residue or a combination thereof, for example, straw produced by Taifeng Agriculture and Animal Husbandry Machinery Plant of Daiyue District, Tai'an City can be used. Grinding machine or rice grinding. Deep grinding can be used, for example, AGO series ball mills produced by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences, for example, AGO-2, AGO-3, AGO-5, etc., and CZJ produced by Zhejiang Fengli Crushing Equipment Co., Ltd. Self-grinding type superfine pulverizer and so on. The conditions for coarse comminution and deep grinding are not critical and depend on the machinery used. Those skilled in the art can determine reasonable operating conditions based on the machinery selected. In general, the conditions required for coarse comminution are determined by the feed conditions for deep comminution. The requirements of the deep pulverizing machine for feeding are achieved by coarse pulverization.

In a preferred embodiment of the sixth aspect of the present invention, the particles of the plant powder having a size of 30 micrometers or less (for example, 28 micrometers or less, 25 micrometers or less, 23 micrometers or less, 22 micrometers or less, 21 micrometers or less or less) account for the total weight of all the particles. At least 10%, preferably at least 30%, more preferably at least 50%, even more preferably at least 70%, most preferably at least 90%. In a preferred embodiment of the sixth aspect of the present invention, the plant powder has a size of 20 or less (for example, 19 μm or less, 18 μm or less, 17 μm or less, 164 mm or less, 15 μm or less, and 144 mm). Below, below 13 mm, below 124 nm, below 11 microns, the particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles. Further preferably, the particles of the plant powder having a size of 10 microns or less account for at least 10%, preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, most preferably at least 90% of the total weight of the total particles; more preferably Particles having a size of 5 microns or less in the vegetable powder comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, and most preferably at least 90%, by total weight of the total particles.

In the present application, the plant powder may be a single source of plant powder, for example derived from rice husks, One of bark, straw, etc. It may also be a combination of plant powders from different sources, such as a combination of plant powder derived from rice hulls and plant powder derived from bark.

In an embodiment of the sixth aspect of the invention, the binder as the sheet material may contain the above-mentioned other binder in addition to the plant powder of the sixth aspect. For example, the content of these other binders can be substantially reduced relative to existing artificial panels, so that those skilled in the art will recognize that it is not sufficient to bond the panel stock by only such binders. For example, in one embodiment, the amount of other binder is less than 15%, preferably less than 10%, more preferably less than 5%, still more preferably less than 2%, such as less than 1% by weight of the board.

However, in one embodiment of the sixth aspect of the present application, in view of environmental, health, and the like, the sheet material does not contain any other binder intentionally added, and only contains the vegetable powder as a binder. Since the plant powder is derived from plants and belongs to the natural, non-polluting class of green binders, the sheet is a non-polluting green product, for example, the formaldehyde content can reach zero.

In an embodiment of the sixth aspect of the invention, the sheet material further comprises other board material other than the vegetable powder. However, in order to obtain a sheet having good properties such as strength and modulus, in an embodiment of the sixth aspect of the present application, the plant powder is at least 5% by weight, preferably at least 10% by weight of the sheet. /. More preferably, it is at least 20%, at least 30% by weight, and at least 40% by weight. /. , at least 50% by weight.

Of course, since the plant powder itself contains a cellulose component, it can also be used alone as a raw material for the production of a board material, i.e., the plant powder can account for 100% by weight of the board. The sheets of the third to sixth aspects of the invention may further contain various additives to enhance their properties, such as additives such as flame retardants, mold inhibitors, water repellents, and organic, inorganic fibers or organic, inorganic fillers and the like. In a seventh aspect of the invention, a method of producing a sheet material according to the third to sixth aspects of the invention, comprising:

(a) mixing the plant powder with optional other board materials to form a board mix;

In addition to the vegetable powder, the above-described board mix may also contain optional other board materials as described above. In an embodiment of the seventh aspect of the present application, the vegetable powders are each at least 5% by weight, preferably at least 10% by weight, more preferably at least 20%, at least 30% by weight of the board mixture. %, at least 40% by weight, at least 50% by weight.

In another embodiment, the pressure is l _ 20 MPa and the temperature is 20 - 250 in hot press forming.

°C.

In still another embodiment, the heat setting, the mold release, and the like are also performed after the hot press forming. In still another embodiment, the pressure is from 1 to 20 MPa and the temperature is from 100 to 250 ° C, preferably from 160 to 210 ° C, during the heat setting. In a preferred embodiment, the incubation is carried out for 3-20 minutes. Example

The following examples are provided to further illustrate the invention. Unless otherwise stated, in the following examples, the test methods include:

The particle size of the plant powder is measured by a particle size analyzer test analysis method.

The performance of the formed sheet products shall be in accordance with the methods stipulated in the National Standard of the People's Republic of China - Physical and chemical properties test methods for wood-based panels and veneer panels (GB/T 17657-1999):

The moisture content is determined according to the method specified in 4.3 of GB/T 17657-1999;

The water absorption thickness expansion rate is determined according to the method specified in 4.5 of GB/T 17657-1999. Soaking time 24h ± 15min;

The internal bond strength is determined according to the method specified in 4.8 of GB/T 17657-1999;

The measurement of the static bending strength and the elastic modulus was carried out in accordance with the method specified in 4.9 of GB/T 17657-1999. Example 1. Preparation of plant powder

The rice husk processed by the grain rice (having a water content of <10%) is used as a raw material for producing plant powder, and the rice husk can be dried in order to meet the water content requirement.

(1) coarse crushing

The rice husks were coarsely pulverized into about 3 mm using a rice husk pulverizer produced by Taifeng Agriculture and Animal Husbandry Machinery Plant in Daiyue District, Tai'an City. This coarse comminution process is a general procedure employed in the manufacture of rice hulls in the art. The rice hull powder obtained in this step is generally used in the prior art as a raw material for producing rice hull sheets.

(2) Deep grinding

The crushed rice husks were placed in an AGO-2 ball mill developed by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences, and subjected to deep grinding for 10 minutes to stop grinding to obtain plant powder.

The size of the plant powder is less than 20 microns as determined by a particle size analyzer test analysis method. The particles account for more than 90% of the total weight of the total particles. Example 2 Preparation of plant powder

Example 1 was repeated except that the cedar sawdust (having a water content of <10 _ 20%) was used as a raw material for producing plant powder, thereby obtaining a plant powder. According to the method of Example 1, the particles having a size of 20 μm or less in the plant powder accounted for more than 90% of the total weight of the total particles. Example 3: Preparation of plant powder

Example 1 was repeated except that corn stover (having a water content of <10%) was used as a raw material for producing plant powder, thereby obtaining a plant powder. According to the method of Example 1, the particles having a size of 20 μm or less in the plant powder accounted for more than 90% of the total weight of the total particles. Example 4 Preparation of plant powder

Example 1 was repeated except that a corn cob (having a water content of <10%) was used as a raw material for producing plant powder, thereby obtaining a plant powder. According to the method of Example 1, the particles having a size of 20 μm or less in the plant powder accounted for more than 90% of the total weight of the total particles. Example 5 Preparation of plant powder

Example 1 was repeated except that bagasse (having a water content of <10%) was used as a raw material for producing plant powder, thereby obtaining a plant powder. According to the method of Example 1, the particles having a size of 20 μm or less in the plant powder accounted for 90% or more of the total weight of the total particles. Example 6. Preparation of plant powder

Example 1 was repeated except that apple bark (having a water content of <10%) was used as a raw material for producing plant powder, thereby obtaining a plant powder. According to the method of Example 1, the particles having a size of 20 μm or less in the plant powder accounted for more than 90% of the total weight of the total particles. Example 7 Production of plates

(1) Mixing

The plant powder prepared in Example 1 was mixed with 40-mesh broken rice hull which was coarsely pulverized without deep grinding, wherein the weight ratio of the plant powder to the 40-mesh broken rice hull was 1:1, and a mixture was obtained; (2) paving

铺Placing the mixture with an AP airflow paving machine, the thickness of the mixture is about 3-4 times the thickness of the formed sheet;

(3) Hot press forming

The hot press forming was carried out by a continuous multi-stage hot press, and the hot press forming pressure was 5 MPa, the temperature was 170 _ 200 ° C, and the time was 3 minutes.

4) Heat preservation and setting

The obtained sheet was subjected to heat preservation and setting, and the pressure of the heat preservation type was 4 MPa, the temperature was 100 - 130 ° C, and the time was 3 minutes. Alternatively, the sheet can be directly produced without heat setting after hot press forming.

(5) demoulding and cooling

The mold is removed and the temperature is slowly lowered at room temperature to obtain a final formed sheet product. Example 8

Example 7 was repeated except that the plant powder prepared in Example 2 was used for the production of the board.

As a result, a formed sheet material was obtained without adding other binder.

A photograph of the sheet prepared in Example 8 is shown in Fig. 4. Example 9

Example 7 was repeated except that the plant powder prepared in Example 3 was used for the production of the board.

The crusting obtained a formed sheet without adding other binder.

A photograph of the sheet prepared in Example 9 is shown in Fig. 5. Example 10

Example 7 was repeated except that the plant powder prepared in Example 4 was used for the production of the board.

As a result, a formed sheet material was obtained without adding other binder. Example 11

Example 7 was repeated except that the plant powder prepared in Example 5 was used. Board.

As a result, a formed sheet material was obtained without adding other binder. Example 12

Example 7 was repeated except that the plant powder prepared in Example 6 was used for the production of the board.

As a result, a formed sheet material was obtained without adding other binder. Example 13

Example 7 was repeated except that 40 mesh broken rice husk was not used, and 100% of the vegetable binder powder obtained in Example 1 was used to produce a board.

As a result, a formed sheet material was obtained without adding other binder. The properties of the sheets obtained in Example 7 were measured as above, and the results are shown in Table 1.

Table 1

The above results show that the completely environmentally friendly formed sheets can be obtained by using the vegetable binder of the present application without adding any conventional inorganic or organic resin binder, and these sheets have good properties. As shown in Table 1, the inner bond strength, static bending strength, elastic modulus, water absorption thickness expansion ratio, etc. of the obtained sheet can reach or exceed the requirements of GB/T 17657-1999. It should be noted that it can be seen that the density of the board obtained by using the vegetable binder of the present application does not fall within the requirements of GB/T 17657-1999. However, the first thing you need to know is that GB/T 17657-1999 does not It is a standard that is perfectly suitable for the sheet of this application. Moreover, the high density of the panels of the present application is a guarantee of other superior properties of such completely environmentally friendly panels and does not affect the use of the panels of the present application.

More importantly, since the organic binder is not used, the sheet of the present application has a zero furfural content and belongs to a pure natural, green sheet. The sheet of Example 13 was also measured in the same manner as above and found to be superior in performance to the sheet produced in Example 7. Scanning electron microscopy (SEM) analysis was performed on the rice hull sheets produced in Example 7 of the present application. Fig. 2 is a SEM photograph of a section of the rice hull sheet, wherein the magnification of Fig. 2(a) is 100 times, and the magnification of Fig. 2(b) is 500 times. Fig. 3 is a SEM photograph of the surface of the rice hull plate, wherein Fig. 3(a) has a magnification of 60 times and Fig. 3(b) has a magnification of 1000 times.

In addition, for comparison, a commercially available ordinary high-density board is also subjected to SEM analysis, and Fig. 1 is a SEM photograph of the cross section thereof, wherein the magnification of Fig. 1(a) is 100 times, and the magnification of Fig. 1(b) is 500 times.

As can be seen from Fig. 1(a), the high-density fiberboard is composed of long-shaped wood fibers, which are not dense in density and have voids in the middle, which is more apparent in Fig. 1(b) where the magnification is high below. It can be seen from the enlarged photograph of the higher magnification of Fig. 1(b) that the high-density fiberboard is composed of long-shaped wood fibers, and the section is the fracture of the individual fibers after the fracture, and there is a clear gap between the fibers.

As can be seen from Fig. 2(a), the rice hull sheet of the present application is a photograph of the fracture of the bonded tissue after tearing, and there is no significant gap between the tissues. As can be seen from the high-magnification photograph of Fig. 2(b), in the fracture photograph after the tearing of the bonded tissue, there is no characteristic of the individual fibrous tissue after fracture. It can be seen from Fig. 3(a) that the sheet of the present application has a dense sheet-like structure. In addition, as can be seen from Figures 2 and 3, after pressing, the rice husk powders have been cemented together rather than tightly packed, and the fracture is also a ductile fracture rather than a brittle fracture.

Therefore, the microscopic difference between the sheet of the present application and the conventional high density board of the prior art can be seen from the comparison of Fig. 1 with Fig. 2 and Fig. 3. Similarly, as can be seen by comparing Figures 1 and 2, the density of the panels of the present application is higher than that of conventional high density panels. This is exactly the support of the data in Table 1. The results of Examples 7 to 13 indicate that the above plant powder has an adhesive function and can be used as a binder. When used to prepare articles such as plates, it can be used to glue similar to conventional organic binders. Function, can replace conventional organic binders. Also, the sheet made using the above plant powder has good properties without using other binders. Example 14

The vegetable binder powder was prepared according to the method of Example 1, except that the CZJ self-grinding ultrafine pulverizer produced by Zhejiang Fengli Crushing Equipment Co., Ltd. was used to replace the AGO developed by the Institute of Solid Chemical and Mechanical Chemistry of the Russian Academy of Sciences. - 2 ball mill, measured by a particle size analyzer test analysis method, in which the particles having a size of 200 μm or less account for more than 10% of the total weight of the total particles.

Example 7 was repeated except that 40 mesh broken rice husks were not used, and 100% of the above obtained plant powder was used to make sheets.

As a result, a formed sheet material was obtained without adding other binder. Example 15

The same as in Example 14, except that the yellow cedar sawdust (having a water content of <10 _ 20%) was used as a raw material for producing plant powder, thereby obtaining a plant powder. The particles having a size of 80 μm or less in the plant powder accounted for 50% or more of the total weight of the total particles as determined by a particle size analyzer test analysis method.

Example 7 was repeated except that 40 mesh broken rice hulls were not used, and 100% of the above obtained plant powder was used to produce sheets.

As a result, a formed sheet material was obtained without adding other binder. Comparative example 1

The sheet was prepared under the same conditions as in Example 7, except that the plant powder of the present invention prepared in Example 1 was not added to the mixture, but the sheet was prepared from a 40-mesh husk without deep grinding.

As a result, the formed sheet was not obtained at all. The results of Examples 14-15 and Comparative Example 1 indicate the plant powders obtained in Examples 14-15 (derived from plant parts comprising lignin/cellulose/hemicellulose and/or amorphous silica, and Particles having a size of 200 μm or less in the plant powder account for at least 10% of the total weight of the total particles.) It has an adhesive action similar to that of a conventional organic binder and can be used as a binder. And, no In the case of using other binders, a plate having good properties can also be obtained by using the above plant powder. Although the present invention has been described by taking rice husks, bark, bagasse, straw, corn cob, etc. as an example, it will be understood by those skilled in the art that other lignin/cellulose/hemicellulose and/or When the plant part of the amorphous silica is pulverized to a sufficiently small particle size, components such as cellulose and/or silica gel having an adhesive function are also released, and thus the obtained plant powder also has a source similar to the source. The function of plant powders such as rice husks.

The terms "optional" and "optionally" as used in this application mean that subsequent events or items (e.g., processing steps) may or may not be present. And the invention encompasses the presence and absence of the event or item.

All cited documents are incorporated herein by reference.

Although the invention has been described with reference to specific embodiments, it is obvious that it can be varied in various ways. Such variations are not to be interpreted as a departure from the spirit and scope of the invention, and all such variations apparent to those skilled in the art are also within the scope of the invention.

Claims

Rights request

A use of a vegetable powder as a binder, wherein the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the plant powder has a size of 200 microns or less ( For example, particles below 150 microns, such as below 100 microns, such as below 80 microns, such as below 50 microns, such as below 30 microns, such as below 20 microns, comprise at least 10%, preferably at least 30%, more preferably at least 30% of the total weight of the total particles. 50%, more preferably at least 70%, most preferably at least 90%.

2. The use according to claim 1, wherein the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of plant husks, plant foliage, plant processing residues or combinations thereof.

3. The use according to claim 2, wherein the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, sugar cane Slag or a combination thereof.

4. The use of claim 3, wherein the chaff is a rice husk.

The use according to any one of claims 1 to 4, wherein the binder is a sheet binder.

6. Use of a vegetable powder as a binder, wherein the plant powder is derived from plant rind, plant foliage, plant processing residue or a combination thereof, the plant powder having a size of 200 microns or less (for example, 150 microns or less, for example 100 microns) In the following, for example, below 80 microns, for example below 50 microns, for example below 30 microns, for example below 20 microns, the particles comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70% of the total weight of the total particles. Most preferably at least 90%.

7. The use of claim 6, wherein the plant powder is derived from bark, sawdust, straw, corn cob, chaff, bagasse, or a combination thereof.

8. The use of claim 7, wherein the chaff is a rice husk.

9. The use according to any one of claims 6 to 8, wherein the adhesive is a sheet adhesive.

10. A sheet material comprising a vegetable powder as a binder and optionally other binders, the other binder being present in an amount of less than 15% by weight of the sheet (eg, less than 10%, such as less than 5%), Wherein the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the plant powder has a size below 200 microns (eg below 150 microns, such as 10 (H) Hereinafter, for example, 8 (H 敫 or less, for example, 5 (H 敖 or less, for example, 30 m or less, for example, 20 μm or less) particles account for at least 10%, preferably at least 30%, of the total weight of the total particles, more preferably It is selected to be at least 50%, more preferably at least 70%, and most preferably at least 90%.

11. The panel of claim 10, wherein the panel further comprises other board materials other than the plant powder.

12. The sheet of claim 10 which does not comprise the other binder.

The board of any one of claims 10 to 13, wherein the plant powder is at least 5 parts by weight of the board. /. Preferably, it is at least 10% by weight, more preferably at least 20%, and at least 30% by weight. /. , at least 40% by weight, at least 50% by weight.

14. A board comprising a vegetable powder as a binder and optionally other binders, the other binder being present in an amount less than 15% by weight of the board (eg, less than 10%, such as less than 5%), Wherein the plant powder is derived from plant rind, plant foliage, plant processing residue, or a combination thereof, wherein the plant powder has a size of 200 microns or less (eg, 150 microns or less, such as 100 microns or less, such as 80 microns or less, such as 50 microns or less). The particles, for example below 30 microns, for example below 20 microns, comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70%, most preferably at least 90% of the total weight of the total particles.

15. The panel of claim 14 wherein said panel further comprises other board materials other than said plant powder.

16. The sheet of claim 14 which does not comprise said other binder.

17. The board of any of claims 14-16, wherein the plant powder is at least 5% by weight, preferably at least 10% by weight, more preferably at least 20%, at least 30% by weight of the board. /. , at least 40% by weight, at least 50% by weight. / ₀ .

18. A board comprising a vegetable powder as a binder, wherein the plant powder is derived from a plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica, wherein the plant powder has a smaller size The particles of 400 mesh (e.g., below 30 microns, such as below 20 microns, such as below 10 microns, such as below 5 microns) comprise at least 10%, preferably at least 30%, more preferably at least 50%, more preferably at least 70% of the total weight of the total particles. %, most preferably at least 90%.

19. The board of claim 18, wherein the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of plant skins, plant foliage, plant processing residues, or combinations thereof.

20. The board of claim 18, wherein the plant part comprising lignin/cellulose/hemicellulose and/or amorphous silica is selected from the group consisting of: bark, sawdust, straw, corn cob, chaff, sugar cane Slag or a combination thereof.

21. The sheet of claim 20, wherein the chaff is a rice husk.

The sheet material according to any one of claims 18 to 21, wherein the sheet material further comprises other board material other than the vegetable powder.

23. The panel of any one of claims 18 to 22, wherein the plant powder is at least 5 by weight of the panel. /. Preferably, it is at least 10% by weight, more preferably at least 20%, and at least 30% by weight. /. , at least

40% by weight, at least 50% by weight. /. .

24. The panel of any of claims 18-23, wherein the panel is free of other binders.

25. A board comprising a vegetable powder as a binder, wherein the plant powder is derived from plant skin, plant foliage, plant processing residues or combinations thereof (eg, selected from bark, sawdust, straw, corn cob, valley) Shell, bagasse or a combination thereof, the particles of the plant powder having a size of less than 400 mesh (for example, 30 micrometers or less, for example, 20 micrometers or less, for example, 10 micrometers or less, for example, 5 micrometers or less) account for at least 10% of the total weight of the total particles. It is preferably at least 30%, more preferably at least 50%, still more preferably at least 70%, and most preferably at least 90%.

26. The panel of claim 25, wherein said panel further comprises other board materials other than said plant powder.

The board of any one of claims 25 to 26, wherein the plant powder is at least 5 parts by weight of the board. /. Preferably, it is at least 10% by weight, more preferably at least 20%, and at least 30% by weight. /. , at least 40% by weight, at least 50% by weight.

The sheet of any of claims 25-27, wherein the sheet is free of other binders.

29. A method of producing a sheet according to any one of claims 14 to 28, comprising:

30. The method of claim 29, wherein the vegetable powder is at least 5% by weight, preferably at least 10% by weight based on the weight of the board mixture. /. More preferably, it is at least 20% and at least 30% by weight. /. , at least 40 weight. /. , at least 50% by weight.

The method according to claim 29 or 30, wherein the hot press molding has a pressure of 1 -20 MPa and a temperature of 20 _ 250 °C.

32. The method of any of claims 29-31, further comprising heat setting.

33. The method of claim 32, wherein the heat setting has a pressure of 1 -20 MPa and a temperature of 160 _ 210 °C.

34. The method of claim 32 or 33, wherein said heat preservation is performed for 3-20 minutes.