WO1998038039A1

WO1998038039A1 - A process for manufacturing the substitute for wood

Info

Publication number: WO1998038039A1
Application number: PCT/CN1998/000026
Authority: WO
Inventors: Kou-I Chang
Original assignee: Chang Kou I
Priority date: 1997-02-26
Filing date: 1998-02-25
Publication date: 1998-09-03
Also published as: AU6087998A; CN1159980A

Abstract

A process for manufacturing a press moulding plate with good constructional strength, which includes the steps of mixing the waste scrap materials of long fibre plant such as rice husk, rice stalk, bagasse, hemp stalk and the like having high ignition point and nonhygroscopic properties with urea, trichloro-cyanamide as well as resin, mixing the mixture obtained with a salt(NaC1) in a certain ratio and heating the resultant to form the basic material, putting the bamboo sheet or network sandwich weaved rattan between the upper and lower basic materials, forming the plate after pressurization and solidification. Thus the product obtained has the advantage that not only protecting environment due to utilizing the waste plant as raw stuff but also replacing wood owing to the good constructional strength and high ignition point (fire prevention), thermal insulation, nonhygroscopic, sound insulation, insect-proof properties, so as to accord the practical requirement.

Description

—Method for Manufacturing Wood Substitutes Technical Field

The present invention relates to a method for manufacturing a board, and in particular, to a method for manufacturing an environmentally friendly alternative to a board. Background technique

The improvement motive of the present invention is that today's building materials or cabinets, carding tables and other items are mostly made of wood, and in the acquisition of materials, a considerable number of trees must be felled to supply enough. However, it is well known that the cultivation of a tree takes a long time, and in terms of current usage, the rate of planting trees is not enough to cope with the speed of felling and use of human beings, and one day forest resources will be exhausted because of this, so In view of this, the world attaches great importance to this problem, and makes up for it by planting trees in large numbers and banning logging. However, the building materials must still be used continuously, and in the case that the wood is too late to be replenished, the unfortunate event of forest depletion can only be prevented by finding a raw material way to completely replace the wood. According to experience, the material of the present invention can be made to have the structural strength of wood and the effects of fire prevention, moisture resistance, heat insulation, sound insulation and the like under the conditions of environmental protection and no use of wood, and meet the needs of use.

The main object of the present invention is to provide an environmentally friendly alternative manufacturing method for replacing plate materials. Summary of the Invention

The purpose of the present invention is achieved by using waste plants such as rice husks, rice stalks, kenaf stalks, or industrial organic wastes, such as waste paper pulp, with urea glue, melamine, resin and salt (N aC l) Heating and mixing to form a basic material, and at the same time, a mesh interlayer made of bamboo or rattan is set between the upper and lower layers of the basic material, so in addition to environmental protection elements, its structural strength is good, and it has fire resistance, The effects of moisture resistance, sound insulation and heat insulation are enough to replace wood as a good building material and meet the needs of practical use.

In this regard, the present invention provides a method for manufacturing environmentally friendly alternatives to plate materials. The method is characterized in that the method includes:

Steps for preparing raw materials: It consists of collecting long-stem cellulosic plants and grinding and crushing them; mixing hardener step: mixing the glue into the aforementioned raw materials and stirring them to form the basic raw materials;

Heating and pressing step: After mixing the basic raw materials with the glue, put them into an extruder and raise the temperature of the contained basic raw materials in the extruder to 80 to 120 C to form a viscous plastic body. Then, press it out appropriately;

Molding step: The basic raw material released in the heating and pressing step is injected into a predetermined mold first, and a sandwich made of a bamboo sheet is set on the basic raw material. Another base material is set, and the base material provided above and below the interlayer is pressed and flattened so that the interlayer plate is firmly bonded to the interlayer.

Wherein, the long-stem fiber plant may be a coarse agricultural bran, rice stalk, bagasse, kenaf stalk, and other agricultural waste plants with high ignition point and no water absorption. The basic raw materials can be high-burning agricultural wastes such as pulp mixed with coarse bran and rice straw. In the step of mixing the hardeners, urea glue and cyanocyanine can be added to the raw materials as glue. The ratio of the urea gel to melamine is 6: 4. Resin can be added to the mixture of raw materials, urea glue and cyanocyanine. The ratio of the mixture of urea glue and cyanocyanine to the resin can be 9: 1. Salt can be added to the mixture of raw materials, urea gum and cyanocyanine. The mixing ratio of urea gel, melamine, resin and salt is 98: 2. 'The outer surface of the board formed by the combination of the base material and the interlayer can be covered with a non-woven fabric so that the board body does not appear rough due to the composition of the base material to increase its value. A heated feeder can be used to send the heated basic raw materials to the mold and then press-mold. Can be made of bamboo interlayer made of rattan. Overview of the drawings

Fig. 1 is a detailed flowchart of the present invention.

Fig. 2 is an exploded view of a plate body made according to the present invention.

Fig. 3 is a schematic structural view of a plate body made according to the present invention.

Fig. 4 is an external view of a plate body produced by the present invention. Best Mode of the Invention

In the present invention, unless otherwise specified, the ratios are all parts by weight, and the temperatures are in degrees Celsius. The present invention will be further described with reference to the following embodiments in conjunction with the accompanying drawings.

1 and FIG. 2, the present invention mainly includes a raw material manufacturing step (1), a mixed hardener step (2), a heating and pressing step (3) and a molding step (4), wherein the raw material manufacturing step The raw materials in (1) are long-fiber waste plants such as rice husks, rice stalks, bagasse, kenaf stalks (it is a light-weight, high-flame plant), which are crushed into raw material. In addition, waste pulp can be mixed with high-burning agricultural waste such as coarse bran and rice straw.

In the step (2) of the mixed hardener, the urea gel (WREA) and melamine (M EA CA IN E) are added to the raw materials, wherein the ratio of the urea gel to melamine is 6: 4. optimal. The mixing ratio of the mixture of urea gum and cyanocyanine to the raw materials is 1:10.

The mixture of urea gum and melamine can be mixed with the resin according to an appropriate ratio, and the foregoing appropriate ratio is preferably 9: 1.

Secondly, in the mixture of the aforementioned raw materials and urea gum, melamine, and resin, human salt (NaCl) can be added, and the mixing ratio of the mixture of urea gum, melamine, resin and salt is 98: 2 is the best.

Therefore, the raw materials obtained by crushing rice husks, rice stalks, bagasse, kenaf stalks, etc., are mixed with a certain proportion of urea gum, melamine, and salt to form the basic raw materials (60). The step of heating and pressing (3) is to place the aforementioned basic raw material (60) in a heating feeder (pressing the heating feeder can be a screw extruder, so the machine is a commonly used machine and is not the invention) The features are not described in detail, and it is heated to 8 (TC to 12 (TC) appropriately to make the basic raw material (60) into a gelatinous plastic body and extruded.

During the entire heating and pressing step (3), due to the high temperature, the ice contained in the basic raw material (60) will be evaporated and discharged, and ammonia gas (produced by the decomposition of urea gel) will be released. Raw material), so that the basic raw material (6Q) is free of moisture and gas, and at this time the basic raw material (60) is uniformly mixed with the previously added glue and other component materials.

As for the forming step (4), the base material (60) released from the heating and pressing step (3) is first injected into a predetermined mold, please refer to FIG. 1 and FIG. 3, and the base material A mesh structure interlayer (5) woven from bamboo or rattan is arranged on the mesh structure (5), and meshes (50) are formed at appropriate intervals, and another interlayer (5) is placed on the interlayer (5). A basic raw material (61) is pressurized and flattened by a press to make the basic raw material provided above and below the interlayer (5) tightly bonded to the interlayer (5), and because the interlayer (5) is provided with The mesh (50), so the basic raw materials at the upper and lower positions can be bonded to each other through each mesh limit (50), so that the combined material has a mesh (50) in the woven-like center sandwich (5) structure, so the The interlayer has an appropriate amount of extension, and the base material (60) of the upper and lower layers also has an appropriate amount of elasticity, so the material produced by the present invention has good structural strength and a better ability to absorb deformation.

In addition, a sandwich (5) structure of a bamboo sheet is sandwiched between the two basic materials (60) and (61), and a plate is formed after cooling and solidifying for a period of time, and the outer surface of the plate is covered with a non-woven fabric ( 62), (63), or other paper materials, and then coated with a fire retardant paint on the surface, so that the board does not appear rough due to the constituents of the basic raw materials (60), (61), and at the same time improve the fire protection effect.

In this way, the board made of the present invention, because the bamboo and rattan are long-fiber plants, have good toughness, are not easy to break and break, and have better pressure resistance than wood, so they have the same thickness. The wood has better structural strength, so as the basic raw material (60), (61), the interlayer (5) is indeed better than wood, and bamboo and rattan grow quickly and are easy to plant without destroying the forest. Environment, meet the requirements of green environmental protection.

Secondly, if a plate body with higher structural strength and thickness is to be obtained, the layer base materials (60), (61) can be increased as needed in the manner described above, and the applicable strength can be obtained. Industrial applicability

Due to the above manufacturing methods to agricultural waste: rice husk, rice straw, bagasse, kenaf straw The waste paper pulp is used as a raw material, and the bamboo and rattan materials used together have a short growth time and are easy to plant and grow. Therefore, the board produced is a new structure with natural environmental protection effects. The new structure has the following characteristics:

1. Fire prevention: Because the rice husk, rice straw, bagasse, kenaf, etc. are all high-flammable substances, the finished product has good fire prevention effect. After the combustion test (according to the inspection regulations CNS 6532), the front side in contact with the flame was charred, while the back side was still non-destructive, thus proving that the fire resistance of the present invention is unquestionable. And because the basic raw materials have been overheated, no ammonia gas will be generated during the heat of the board, and its safety is beyond doubt.

2. Moisture-proof: Because rice husk, rice stalk, bagasse, and kenaf stalk are all very fibrous plants, they do not have the ability to absorb water. The board has no water-absorbing effect, and its moisture-proof effect is better.

3. Anti-insect: Because salt is added to the basic raw materials, the board is salty, and the tapeworm is not easy to parasitize, so it has a good anti-insect effect.

4. Insulation and sound insulation: Since the basic material and the mesh interlayer are fiber plants, their thermal conductivity is quite low, so they are better than ordinary wood or building materials in terms of heat insulation. In addition, the sound-proof building materials are also made of cane boards. From this, it can be known that the board body made of rice husks, rice straws, bagasse, kenaf stalks and the like has better sound insulation effects.

5. Good structural strength: The structure obtained by the manufacturing method of the present invention is sandwiched by a net-like interlayer made of bamboo and rattan material, which can become a plate to effectively improve the overall structural strength, and the woven bamboo structure It has better elastic effect, can effectively and quickly disperse the force, and avoid structural damage caused by stress concentration. Therefore, compared with ordinary plant building materials, it is only simple plant mixing and pressing, which has poor bonding and structural strength. In the case, there is better structural strength.

Therefore, the manufacturing method of the present invention makes effective use of waste plants to make it reusable. Moreover, the prepared board has the effects of fire prevention, moisture resistance, insect resistance, heat insulation, sound insulation, and good structural strength, and can actually replace the most commonly used today. Wood is a new generation of building materials. Besides, bamboo The high growth and easy-to-plant characteristics are beyond the reach of trees, which can slow down the rate of tree felling and have excellent benefits for ensuring green resources.

In summary, the present invention uses innovative methods, materials and processes to produce a natural, zero-pollution wood substitute that fully meets environmental protection requirements, and its use efficiency is superior. Therefore, its practicability and progress should be There is no doubt about it.

Claims

Rights request

1. A method for manufacturing environmentally friendly alternatives to plate materials, characterized in that the method includes:

Raw material preparation step: It consists of long-stem cellulosic plants concentrated and ground and crushed; mixed hardener step: mixing the glue into the aforementioned raw materials and stirring them to form the basic raw materials;

Heating and pressing step: After mixing the base material with the glue, put it into an extruder, and raise the temperature of the contained base material in the extruder to 80-120 ° C to form a viscous plastic. After the body, it should be properly pressed out;

Molding step: The basic raw material released by the heating and pressing step is first injected into a predetermined mold, and a sandwich made of bamboo pieces is set on the basic raw material, and the sandwich made of the bamboo pieces can be placed again. Another base material is set, and the base material provided above and below the interlayer is pressed and flattened to obtain a plate body which is fastened and bonded with the interlayer.

2. The method for manufacturing environmentally friendly substitutes for replacing boards according to claim 1, characterized in that: the long-stem fiber plant is a high-burning, non-water-absorbing fiber including coarse bran, rice straw, bagasse, and kenaf stalk. Agricultural abandoned plants.

3. The method for manufacturing an environmentally friendly alternative to sheet material according to claim 1, characterized in that the basic raw material can be a high-burning point agricultural waste including pulp mixed with coarse bran and rice straw.

4. The method for manufacturing environmentally friendly substitutes for replacing sheet material according to claim 1, characterized in that: in the step of mixing the hardener, urea glue and cyanocyanine can be added to the raw material as the glue.

5. The method for manufacturing an environmentally friendly substitute for a substitute plate according to claim 4, characterized in that the ratio of the urea gum to melamine is 6: 4.

6. The method for manufacturing an environmentally friendly substitute for a substitute plate according to claim 4, wherein The characteristics are: resin can be added to the mixture of raw materials, urea glue and cyanocyanine.

7. The method for manufacturing an environmentally friendly substitute for a substitute plate according to claim 6, characterized in that the ratio of the mixture of urea amine, melamine and resin is 9: 1.

8. The method for manufacturing an environmentally friendly substitute for replacing a plate according to claim 4 or 7, characterized in that: a salt can be added to a mixture of the raw material, urea glue, and cyanocyanine.

9. The method for manufacturing an environmentally friendly substitute for a substitute plate according to claim 8, characterized in that the mixing ratio of the mixture of urea gum, melamine, resin, and salt is 98: 2.

10. The method of manufacturing an environmentally friendly substitute for a sheet material according to claim 1, wherein the outer surface of the board formed by combining the base material and the interlayer can be covered with a non-woven fabric so that the board body is not caused by the components of the base material. It appears rough to increase its value.

11. The method for manufacturing environmentally friendly substitutes for replacing sheet material according to claim 1, characterized in that: a heating feeder can be used to send the heated basic raw materials to a mold and then pressurize and mold.

12. The method for manufacturing an environmentally-friendly alternative to sheet material according to claim 1, characterized in that: the net-shaped interlayer made of bamboo material can be replaced by rattan material.