Building wood planking recycling method

A technology of wood formwork and construction, applied in applications, household appliances, household components, etc., can solve the problems of large amount of construction wood formwork and recycling problems

Inactive Publication Date: 2012-07-04
SICHUAN AGRI UNIV
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Problems solved by technology

[0003] Due to the large amount of building wood formwor

Method used

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Embodiment Construction

[0010] The present invention will be described in detail below in conjunction with specific embodiments.

[0011] First, soak the waste and old building wooden formwork in a clear water pool for 3 to 5 days. Add chemical agents for moderate degradation treatment, and use chemical agents to partially degrade chemically modified wood under mild conditions. The selected chemical agent is phenol aqueous solution, and the mass percentage concentration of phenol aqueous solution is 10-15%. Add a suitable alkaline catalyst, The catalyst is a hydroxide (such as NaOH or KOH or Ca(OH) 2 One of them or a mixture in any proportion), the addition amount is 5-10% of the weight of the treatment solution; treatment at 80°C for 30-150 minutes will cause part of the lignin to decompose, the lignin network structure will be loosened and broken, and the glue layer degradation. Then put it into a cooking device with a temperature above 105° C. and cook for 36 to 48 hours. At this time, the waste...

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Abstract

The invention discloses a building wood planking recycling method which comprises the following steps: firstly, waste building wood planking is soaked in a clean water tank for 3 to 5 days; then chemical agent for modest degradation treatment is added for appropriate degradation process, then the waste building wood planking is placed into a steaming plant with the temperature higher than 105 DEG C for stewing for 36 to 48 hour, and then the waste building wood planking is layered and peeled off, so as to form a veneer; and after peeling off, the water content of the veneer is dried to 8 to 12 percent, the veneer is taken as a core plate and used together with the whole veneer of a novel rotary cutter, then is sent into a cold press machine for cold pressing for 30 min through sizing and assembling, and then is sent to a hot press, and finished product is formed through edge cutting, sanding and checking. The water absorption thickness expansion ratio is lower than 12 percent, the static bending strength is 28.3MP, and the elastic modulus is 3.62 103MPa, which is larger than or equal to 0.7 Mpa (national standard) and is 0.82 MPa. The operating requirements of concrete template plywood are all met.

Description

technical field [0001] The invention relates to a method for recycling building wooden formwork, and belongs to the technical field of waste recycling. Background technique [0002] At present, the building templates used in the market are made of metal, plastic, and wooden materials. There are disadvantages such as easy deformation of metal materials, easy aging of plastic templates, and limited service life of wooden materials. Most of the materials used in building wood formwork are masson pine as raw material, and the service life is generally 5 to 8 years. [0003] Due to the large amount of use of building wood formwork, there are certain difficulties in its recycling. At the current stage, its recycling is mainly in the following aspects: the production of wood-plastic composite materials, blockboard, fiberboard, particleboard or directly as fuel. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a method ...

Claims

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Application Information

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IPC IPC(8): B27M1/08B27N3/08
Inventor 杨永前
Owner SICHUAN AGRI UNIV
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