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Preparation method for shaving board with high moisture content

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: 2015-04-08
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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  • Preparation method for shaving board with high moisture content
  • Preparation method for shaving board with high moisture content
  • Preparation method for shaving board with high moisture content

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of preparation method of high moisture content particle board, concrete steps are as follows:

[0043] (1) Preparation of shavings: shaving raw poplar wood of various specifications, and then screening, sending super-large shavings to the re-crusher for re-crushing and then returning, and sending qualified shavings to the dryer for drying to absolute dryness;

[0044] (2), adjust the moisture content: take the shavings according to the density and size of the particleboard for making, evenly spray water and stir in the shavings, adjust the moisture content of the shavings to 25%;

[0045] (3), sizing: Utilize the spray gun to evenly spray the adhesive on the shavings, and stir evenly at the same time, 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 750g / cm 3 , at 135 ° C, hot pressing for 10 minutes to obtain a high moisture content particleboard.

[0047] The adhesive des...

Embodiment 2

[0067] A kind of preparation method of high moisture content particle board, concrete steps are as follows:

[0068] (1) Preparation of shavings: shaving raw poplar wood of various specifications, and then screening, sending super-large shavings to the re-crusher for re-crushing and then returning, and sending qualified shavings to the dryer for drying to absolute dryness;

[0069] (2), adjust the moisture content: take the shavings according to the density and size of the particleboard for making, evenly spray water and stir in the shavings, adjust the moisture content of the shavings to 20%;

[0070] (3), sizing: Utilize the spray gun to evenly spray the adhesive on 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 700g / cm 3 , at 130 ° C, hot pressing for 8 minutes to obtain a high moisture content particleboard.

[0072] The adhesive desc...

Embodiment 3

[0080] A kind of preparation method of high moisture content particle board, concrete steps are as follows:

[0081] (1) Preparation of shavings: shaving raw poplar wood of various specifications, and then screening, sending super-large shavings to the re-crusher for re-crushing and then returning, and sending qualified shavings to the dryer for drying to absolute dryness;

[0082] (2), adjust moisture content: take shavings according to making particleboard density and size, spray water and stir in shavings, the moisture content of shavings is adjusted to moisture content 40%;

[0083] (3), sizing: Utilize the spray gun to evenly spray the adhesive on the shavings, and stir evenly at the same time, 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 800g / cm 3 , at 140 ° C, hot pressing for 10 minutes to obtain a high moisture content particleboard.

[0085] The adhesive described in the ...

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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 wood-based panels, in particular to a particle board, in particular to a method for preparing a high moisture content particle board. Background technique [0002] Particleboard, also known as particle board, particle board, or bagasse board, is a wood-based panel that is made of wood or other lignocellulosic materials and glued under heat and pressure after applying an adhesive, also known as particle board. It is mainly used in furniture manufacturing and construction industry as well as train and car carriage manufacturing. Because the particleboard structure is relatively uniform and the processing performance is good, it can be processed into large-format boards according to needs. It is a good raw material for making furniture of different specifications and styles. The finished product particle board does not need to be dried again, it can be used directly, and the sound absorption and sound insul...

Claims

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Application Information

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Patent Type & Authority Applications(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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