A kind of preparation method of high moisture content particleboard

A high moisture content, particleboard technology, applied in the direction of manufacturing tools, flat products, pretreatment of molding materials, etc., can solve the problems of low mechanical properties of particleboard, poor dimensional stability, complicated preparation process, etc., to achieve good health, low cost, etc. Good water absorption thickness expansion rate and good flexibility

Active Publication Date: 2016-06-08
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The traditional particleboard production process needs to have a process of drying wood shavings, the preparation process is relatively complicated, and the production cost is relatively high, and the traditional particleboard has low mechanical properties and relatively poor dimensional stability
Moreover, "trialdehyde glue" is often used as an adhesive. "Three aldehyde glue" is easy to release irritating and toxic gases (free formaldehyde, etc.) during the bonding process and in the use of finished products, which will bring certain physical harm to the environment and users.

Method used

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  • A kind of preparation method of high moisture content particleboard
  • A kind of preparation method of high moisture content particleboard
  • A kind of preparation method of high moisture content particleboard

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A method for preparing particleboard with high moisture content, the specific steps are as follows:

[0043] (1) Preparation of shavings: shavings of poplar wood of various specifications are carried out, and then screened, the super-large shavings are sent to the reshredder for re-shredding and then returned, and the qualified shavings are sent to the dryer for drying to dryness;

[0044] (2) Adjust the moisture content: Weigh the shavings according to the density and size of the produced particleboard, spray water evenly into the shavings and stir to adjust the moisture content of the shavings to 25%;

[0045] (3) Sizing: Use a spray gun to evenly spray the adhesive onto the shavings, while stirring evenly, the sizing amount is 8%wt;

[0046] (4) Board making: evenly lay the shavings after sizing into a 300mm×300mm×10mm mold with a density of 750kg / m 3 , Hot press at 135℃ for 10min to get high moisture content particleboard.

[0047] The adhesive described in step (3) is a mois...

Embodiment 2

[0067] A method for preparing particleboard with high moisture content, the specific steps are as follows:

[0068] (1) Preparation of shavings: shavings of poplar wood of various specifications are carried out, and then screened, the super-large shavings are sent to the reshredder for re-shredding and then returned, and the qualified shavings are sent to the dryer for drying to dryness;

[0069] (2) Adjust the moisture content: Weigh the shavings according to the density and size of the produced particleboard, spray water evenly into the shavings and stir, adjust the moisture content of the shavings to 20%;

[0070] (3) Sizing: Use a spray gun to evenly spray the adhesive onto the shavings, and stir evenly at the same time, the sizing amount is 5%wt;

[0071] (4) Board making: evenly lay the shavings after sizing into a 300mm×300mm×10mm mold with a density of 700kg / m 3 , Hot-pressing at 130℃ for 8min to get high moisture content particleboard.

[0072] The adhesive described in step (3...

Embodiment 3

[0080] A method for preparing particleboard with high moisture content, the specific steps are as follows:

[0081] (1) Preparation of shavings: shavings of poplar wood of various specifications are carried out, and then screened, the super-large shavings are sent to the reshredder for re-shredding and then returned, and the qualified shavings are sent to the dryer for drying to dryness;

[0082] (2) Adjust the moisture content: Weigh the shavings according to the density and size of the produced particleboard, spray water into the shavings and stir to adjust the moisture content of the shavings to 40%;

[0083] (3) Sizing: Use a spray gun to evenly spray the adhesive onto the shavings, while stirring evenly, the sizing amount is 5-8%wt;

[0084] (4) Board making: evenly lay the shavings after sizing into a 300mm×300mm×10mm mold with a density of 800kg / m 3 , Hot press at 140℃ for 10min to get high moisture content particleboard.

[0085] The adhesive described in step (3) is a moist hea...

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Abstract

The invention discloses a preparation method for a shaving board with high moisture content. The preparation method comprises the following specific steps: carrying out shaving screening on raw materials of different specifications and drying qualified shavings; weighing the shavings according to the density and the size of the to-be-manufactured shaving board and regulating the moisture content of each shaving to be 20-40 percent; enabling the sizing amount to be 5-8 percent by weight; uniformly laying the sized shavings in a mould, and hot-pressing for 8-10 minutes under the density of 700-800 g / cm<3> at the temperature of 130-140 DEG C so as to obtain the shaving board with high moisture content. The shaving board with high moisture content prepared by the method has high mechanical property and excellent size stability, such as lower water absorption and thickness swelling rate, reduces formaldehyde release quantity, and is beneficial to physical health.

Description

Technical field [0001] The invention relates to the technical field of artificial boards, in particular to a particleboard, and in particular to a preparation method of a particleboard with high moisture content. Background technique [0002] Particle board, also called particle board, particle board, bagasse board, is a wood-based board made of wood or other lignocellulosic materials and glued under the action of heat and pressure after applying an adhesive, also known as particle board. Mainly used in furniture manufacturing, construction industry, train and automobile carriage manufacturing. Because the particleboard has a relatively uniform structure and good processing performance, it can be processed into large-format panels according to needs. It is a better raw material for making furniture of different specifications and styles. The finished product particleboard does not need to be dried again, can be used directly, and has good sound absorption and sound insulation pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B27N3/02B27N1/00C09J161/30C09J11/08C08G18/48
CPCB27N1/0263B27N3/002B27N3/02B27N3/08C08G18/10C08G18/4027C08G18/4825C08L75/08C08G18/54
Inventor 蒋军卢晓宁王芳那斌王志强韩书广崔举庆任少波
Owner NANJING FORESTRY UNIV
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