Production method of palm fiber shaving board

Abstract

The invention discloses a palm fiber shaving board production method, which belongs to the technical field of shaving board production, and comprises the following steps: S1, manufacturing coarse shavings and fine shavings; s2, preparing coarse palm fibers and fine palm fiber particles from palm fibers; s3, spraying glue; s4, drying; s5, paving and pre-pressing: paving the dried coarse wood shavings, fine wood shavings, coarse palm fibers and fine palm fiber particles according to a sequence of the fine palm fiber particles, the fine wood shavings, the coarse palm fibers, the coarse wood shavings, the coarse palm fibers, the fine wood shavings and the fine palm fiber particles, and continuously pre-pressing the coarse wood shavings, the fine wood shavings, the coarse palm fibers and the fine palm fiber particles; s6, performing hot pressing to obtain a product. The palm fibers are applied to the shaving board, comprehensive utilization of the palm fibers in the mattress production process can be achieved, resource waste is reduced, the strength of the shaving board can be improved under the condition that the wood consumption is reduced, the shaving board is endowed with more effects, and a wider application prospect can be provided for resource utilization of the palm fibers.

Description

Technical Field

[0001] The invention relates to the field of particleboard production, in particular to a method for producing a palm fiber particleboard. Background Art

[0002] Palm is a widely distributed monocot. Grown in vast swathes of the world, it can be used as a local raw material for fiber, wax, and other materials. Ancient people used palm sheath fibers to weave ropes. Chinese Patent 90100464.2 discloses a method for producing a plant fiber mattress. Palm fiber filaments are curled and blown into a three-dimensional distribution using an airflow. Glue is then sprayed on the fibers to bond the nodes between the filaments to form a plant fiber elastic sheet. The elastic sheets are then stacked to form a mattress. The existing production process and technical solution involves first producing an elastic sheet slightly wider than the width of the mattress. The sheets are then stacked in the direction of exit from the production line to form the mattress core material. The sheets are then heat-pressed, vulcanized, and then cut to the edges.

[0003] To further utilize palm fiber as a resource and explore the need for developing new palm fiber products, Chinese Patent No. 201710338166.8 discloses a method for producing palm fiber particleboard, comprising the following steps: first, preparing an inorganic glue; second, preparing a composite modified organic gelling material; third, mixing and stirring the mixture to obtain the glue; fourth, pulling the palm fiber into individual fibers of varying lengths; fifth, allowing the fibers to evenly absorb the glue and pressing the fibers into palm fiber particleboard of varying thicknesses; sixth, cold-pressing the entire stack of palm fiber particleboard; seventh, after the palm fiber particleboard has been cold-pressed and shaped, hot-pressing it; and eighth, eliminating internal stress. The palm fiber particleboard produced by this method exhibits overall flame retardancy and termite resistance and is suitable for outdoor use. The product is a green and environmentally friendly board with excellent water, fire, and weather resistance properties. This pure palm fiber particleboard does not have large wood shavings as the basic skeleton, and the board is not strong enough. When grooving, fixing and other processing are performed on the board, the fiber filaments at the cut are easy to break apart, and the effect of use is not ideal. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for producing palm fiber particleboard, which can not only make use of palm fiber as a resource, but also improve the comprehensive properties of the particleboard, such as strength and use effect, and is natural, healthy and environmentally friendly.

[0005] The technical solution of the present invention:

[0006] A method for producing palm fiber particleboard comprises the following steps:

[0007] S1. Make coarse shavings and fine shavings;

[0008] S2. Coarse palm fiber filaments and fine palm fiber particles were obtained by making palm fiber;

[0009] S3 spray glue: spray glue on the coarse wood shavings, fine wood shavings, coarse palm fiber filaments and fine palm fiber particles obtained in the production, by weight, the amount of glue sprayed is 10-25% of the raw material;

[0010] S4. Drying: The raw materials after spraying are respectively dried by drums at a drying temperature of 160-180°C until the moisture content is 3%-5%;

[0011] S5. Paving and pre-pressing: The dried coarse wood shavings, fine wood shavings, coarse palm fiber filaments, and fine palm fiber particles are laid in the order of fine palm fiber particles → fine wood shavings → coarse palm fiber filaments → coarse wood shavings → coarse palm fiber filaments → fine wood shavings → fine palm fiber particles, and continuously pre-pressed;

[0012] S6. Hot pressing: Continuous hot pressing is adopted, with a hot pressing pressure of 3-3.5 MPa / mm, a hot pressing time of 40-60 min, and a hot pressing temperature of 180-220°C. After hot pressing, cooling, sanding, and trimming are performed to obtain a particleboard product.

[0013] In step S4, during drying, the coarse wood shavings and the coarse palm fiber filaments enter the drum together for drying and mixing to obtain a mixture of wood shavings and fiber filaments. In step S5, the paving is carried out in the order of fine palm fiber particles → fine wood shavings → wood shavings and fiber filament mixture → fine wood shavings → fine palm fiber particles.

[0014] The coarse palm fiber filaments are 10-100 mm in diameter.

[0015] The fine palm fiber particles are 200-650 meshes.

[0016] The coarse palm fiber filaments and fine palm fiber particles are prepared from waste materials of palm fiber elastic mattresses or natural palm fibers.

[0017] The coarse shavings are prepared by cutting moist beech wood into 200-300 mm wood segments, and then radially milling them into large shavings using a milling machine. The coarse shavings have the following dimensions: length 100-200 mm, width 5-50 mm, and thickness 0.1-0.2 mm.

[0018] The fine wood shavings are obtained by processing the coarse wood shavings using a shaving machine. The size of the fine wood shavings is 2-20 mm in length, 1-10 mm in width and 0.01-0.1 mm in thickness.

[0019] In S3, the glue spraying adopts natural latex, and 3%-5% of calcium carbonate by weight of the dry matter of the latex is added to the natural latex as a curing agent.

[0020] In step S5, when laying in the order of fine palm fiber particles → fine wood shavings → coarse palm fiber filaments → coarse wood shavings → coarse palm fiber filaments → fine wood shavings → fine palm fiber particles, the weight ratio of palm fiber particles: fine wood shavings: coarse palm fiber: coarse wood shavings is 2-3:1.5-2.5:1.5-2.5:1.

[0021] In step S5, when paving is performed in the order of fine palm fiber particles → fine wood shavings → wood shavings and fiber mixture → fine wood shavings → fine palm fiber particles, the weight ratio of palm fiber particles: fine wood shavings: coarse palm fiber: coarse wood shavings is 2-3:1.5-2.5:0.8-1.2:1.5.

[0022] The beneficial effects of the present invention are as follows: the present invention applies palm fiber to particleboard, which can realize comprehensive utilization of palm fiber waste in the mattress production process, or utilize palm fiber with poor appearance and cannot be used for mattress production, thereby reducing resource waste;

[0023] Natural rubber is used as adhesive during the production process, which is formaldehyde-free. The entire board is natural, healthy and environmentally friendly, and is more in line with the development needs of green and environmentally friendly buildings.

[0024] The addition of palm fiber can play a silent role due to the honeycomb hollow shape inside the fiber. The technical solution of the present invention uses coarse palm fiber filaments alone as the middle layer of the particleboard, or mixes them with coarse wood chips as the middle layer to form a fiber reinforcement structure with the coarse wood chips, which can increase the strength, toughness and stability of the particleboard, and can improve the flexural and compressive strength of the particleboard. Using fine palm fiber particles as the outermost layer of the board can improve the corrosion resistance and moisture resistance of the board.

[0025] The present invention can improve the strength of the particle board while reducing the amount of wood used, and can give the particle board more functions, thereby providing a broader application prospect for the resource utilization of palm fiber. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the examples, but they are not intended to limit the present invention.

[0027] Example 1.

[0028] A method for producing palm fiber particleboard comprises the following steps:

[0029] S1. Make coarse shavings and fine shavings;

[0030] S2. Coarse palm fiber filaments and fine palm fiber particles were obtained by making palm fiber;

[0031] S3. Glue spraying: Spraying glue on the coarse wood shavings, fine wood shavings, coarse palm fiber filaments and fine palm fiber particles obtained in the production, in an amount of 10-25% by weight of the raw material;

[0032] S4. Drying: The raw materials after spraying are respectively dried by drums at a drying temperature of 160-180°C until the moisture content is 3%-5%;

[0033] S5. Paving and pre-pressing: The dried coarse wood shavings, fine wood shavings, coarse palm fiber filaments, and fine palm fiber particles are laid in the order of fine palm fiber particles → fine wood shavings → coarse palm fiber filaments → coarse wood shavings → coarse palm fiber filaments → fine wood shavings → fine palm fiber particles, and continuously pre-pressed;

[0034] S6. Hot pressing: Continuous hot pressing is adopted, with a hot pressing pressure of 3-3.5 MPa / mm, a hot pressing time of 40-60 min, and a hot pressing temperature of 180-220°C. After hot pressing, cooling, sanding, and trimming are performed to obtain a particleboard product.

[0035] In step S4, during drying, the coarse wood shavings and the coarse palm fiber filaments enter the drum together for drying and mixing to obtain a mixture of wood shavings and fiber filaments. In step S5, the paving is carried out in the order of fine palm fiber particles → fine wood shavings → wood shavings and fiber filament mixture → fine wood shavings → fine palm fiber particles.

[0036] The coarse palm fiber filaments are 10-100 mm in diameter.

[0037] The fine palm fiber particles are 200-650 meshes.

[0038] The coarse palm fiber filaments and fine palm fiber particles are prepared from waste materials of palm fiber elastic mattresses or natural palm fibers.

[0039] The coarse shavings are prepared by cutting moist beech wood into 200-300 mm wood segments, and then radially milling them into large shavings using a milling machine. The coarse shavings have the following dimensions: length 100-200 mm, width 5-50 mm, and thickness 0.1-0.2 mm.

[0040] The fine wood shavings are obtained by processing the coarse wood shavings using a shaving machine. The size of the fine wood shavings is 2-20 mm in length, 1-10 mm in width and 0.01-0.1 mm in thickness.

[0041] In S3, the glue spraying adopts natural latex, and 3%-5% of calcium carbonate by weight of the dry matter of the latex is added to the natural latex as a curing agent.

[0042] Example 2

[0043] A method for producing palm fiber particleboard comprises the following steps:

[0044] S1. Make coarse shavings and fine shavings;

[0045] S2. Coarse palm fiber filaments and fine palm fiber particles were obtained by making palm fiber;

[0046] S3. Glue spraying: Spraying glue on the coarse wood shavings, fine wood shavings, coarse palm fiber filaments and fine palm fiber particles obtained in the production, the amount of glue sprayed is 15% by weight of the raw materials;

[0047] S4. Drying: The sprayed raw materials were drum dried at 170°C to a moisture content of 4%.

[0048] S5. Laying and pre-pressing: Lay the dried coarse wood shavings, fine wood shavings, coarse palm fiber filaments and fine palm fiber granules in the order of fine palm fiber granules → fine wood shavings → coarse palm fiber filaments → coarse wood shavings → coarse palm fiber filaments → fine wood shavings → fine palm fiber granules, and perform continuous pre-pressing; by weight, the ratio of palm fiber granules: fine wood shavings: coarse palm fiber: coarse wood shavings is 2-3:1.5-2.5:1.5-2.5:1.

[0049] S6. Hot pressing: Continuous hot pressing is used with a hot pressing pressure of 3.2 MPa / mm, a hot pressing time of 50 min, and a hot pressing temperature of 200°C. After hot pressing, cooling, sanding, and trimming are performed to obtain a particleboard product.

[0050] The coarse shavings are obtained by cutting moist beech wood into wood segments of about 250 mm, and then radially milling the wood segments into large shavings using a milling machine. The coarse shavings have a length of 120-150 mm, a width of 10-40 mm, and a thickness of 0.1-0.2 mm.

[0051] The fine wood shavings are obtained by processing the coarse wood shavings using a shaving machine. The size of the fine wood shavings is 5-15 mm in length, 3-8 mm in width and 0.01-0.1 mm in thickness.

[0052] In S3, the glue spraying adopts natural latex, and 4% calcium carbonate of the dry matter mass of latex is added to the natural latex as a curing agent.

[0053] Example 3

[0054] A method for producing palm fiber particleboard comprises the following steps:

[0055] S1. Make coarse shavings and fine shavings;

[0056] S2. Coarse palm fiber filaments and fine palm fiber particles were obtained by making palm fiber;

[0057] S3. Glue spraying: Spraying glue on the coarse wood shavings, fine wood shavings, coarse palm fiber filaments and fine palm fiber particles obtained in the production, the glue spraying amount being 20% ​​by weight of the raw materials;

[0058] S4 Drying: After the spraying, the raw materials were drum dried at a drying temperature of 165 ° C to a moisture content of 4%; during drying, the coarse wood shavings and coarse palm fiber filaments were drum dried and mixed to obtain a mixture of wood shavings and fiber filaments;

[0059] S5. Paving and pre-pressing: The dried wood shavings and fiber mixture, fine wood shavings, and fine palm fiber particles are laid in the order of fine palm fiber particles → fine wood shavings → wood shavings and fiber mixture → fine wood shavings → fine palm fiber particles. By weight, the ratio of palm fiber particles: fine wood shavings: coarse palm fiber: coarse wood shavings is 2.5:2:1:1.5.

[0060] S6. Hot pressing: Continuous hot pressing was performed at a pressure of 33 MPa / mm, a time of 45 min, and a temperature of 190°C. After hot pressing, the particles were cooled, sanded, and trimmed to obtain a particleboard product.

Claims

1. A method for producing palm fiber particleboard, characterized in that: The following steps are included: S1. Make coarse shavings and fine shavings; S2. Coarse palm fiber filaments and fine palm fiber particles were obtained by making palm fiber; S3 spray glue: spray glue on the coarse wood shavings, fine wood shavings, coarse palm fiber filaments and fine palm fiber particles obtained in the production, by weight, the amount of glue sprayed is 10-25% of the raw material; S4. Drying: The raw materials after spraying are respectively dried by drums at a drying temperature of 160-180°C until the moisture content is 3%-5%; S5. Paving and pre-pressing: The dried coarse wood shavings, fine wood shavings, coarse palm fiber filaments, and fine palm fiber particles are laid in the order of fine palm fiber particles → fine wood shavings → coarse palm fiber filaments → coarse wood shavings → coarse palm fiber filaments → fine wood shavings → fine palm fiber particles, and continuously pre-pressed; S6. Hot pressing: Continuous hot pressing is adopted, with a hot pressing pressure of 3-3.5 MPa / mm, a hot pressing time of 40-60 min, and a hot pressing temperature of 180-220°C. After hot pressing, cooling, sanding, and trimming are performed to obtain a particleboard product.

2. The method for producing palm fiber particleboard according to claim 1, characterized in that: In step S4, during drying, the coarse wood shavings and the coarse palm fiber filaments enter the drum together for drying and mixing to obtain a mixture of wood shavings and fiber filaments. In step S5, the paving is carried out in the order of fine palm fiber particles → fine wood shavings → wood shavings and fiber filament mixture → fine wood shavings → fine palm fiber particles.

3. The method for producing palm fiber particleboard according to claim 1, wherein: The coarse palm fiber filaments are 10-100 mm in diameter.

4. The method for producing palm fiber particleboard according to claim 1, wherein: The fine palm fiber particles are 200-650 meshes.

5. The method for producing palm fiber particleboard according to claim 1, wherein: The coarse palm fiber filaments and fine palm fiber particles are prepared from waste materials of palm fiber elastic mattresses or natural palm fibers.

6. The method for producing palm fiber particleboard according to claim 1, characterized in that: The coarse shavings are prepared by cutting moist beech wood into 200-300 mm wood segments, and then radially milling them into large shavings using a milling machine. The coarse shavings have the following dimensions: length 100-200 mm, width 5-50 mm, and thickness 0.1-0.2 mm.

7. The method for producing palm fiber particleboard according to claim 6, characterized in that: The fine wood shavings are obtained by processing the coarse wood shavings using a shaving machine. The size of the fine wood shavings is 2-20 mm in length, 1-10 mm in width and 0.01-0.1 mm in thickness.

8. The method for producing palm fiber particleboard according to claim 1, wherein: In S3, the glue spraying adopts natural latex, and 3%-5% of calcium carbonate by weight of the dry matter of the latex is added to the natural latex as a curing agent.

9. The method for producing palm fiber particleboard according to claim 1, wherein: In step S5, when laying in the order of fine palm fiber particles → fine wood shavings → coarse palm fiber filaments → coarse wood shavings → coarse palm fiber filaments → fine wood shavings → fine palm fiber particles, the weight ratio of palm fiber particles: fine wood shavings: coarse palm fiber: coarse wood shavings is 2-3:1.5-2.5:1.5-2.5:

1.

10. The method for producing palm fiber particleboard according to claim 1 or 2, characterized in that: In step S5, when paving is performed in the order of fine palm fiber particles → fine wood shavings → wood shavings and fiber mixture → fine wood shavings → fine palm fiber particles, the weight ratio of palm fiber particles: fine wood shavings: coarse palm fiber: coarse wood shavings is 2-3:1.5-2.5:0.8-1.2:1.5.