Preparation method of phenol-formaldehyde resin based composite material sleeper

A composite material and phenolic resin technology, applied in the direction of flat products, impregnated wood, manufacturing tools, etc., can solve the problems that restrict the rapid development of the national economy, achieve the effects of optimizing the wood consumption structure, good anti-ultraviolet aging performance, and low cost

Inactive Publication Date: 2012-10-24
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to the sleepers that need to be replaced, there will be a gap of 120 million sleepers. If this problem cannot be solved well, it will seriously restrict the rapid development of the national economy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] The preparation method of the phenolic resin-based composite sleeper comprises the following processes in sequence:

[0026] (1). Preparation of prepreg: Prepare woody residues into wood chips with a particle size of 1-3mm, sieve and remove impurities through an electric screening machine, and dry in an oven to control the moisture content below 6%; 5×15 × 2500mm and 5 × 15 × 220mm Moso bamboo slices were polished to remove surface burrs and dirt, soaked in phenolic resin glue accounting for 30% of the total mass for 5 minutes, heated and dried after treatment, and cooled for later use; the solid weight (phenolic resin) accounted for 43 % phenolic resin glue is atomized and fully and evenly stirred in a mixer with woody residue for subsequent use, and the ratio of phenolic resin glue to the total weight of the mixture is 16%, and 4% urea is added in the phenolic resin.

[0027] (2). Preparation of the surface material: fully soak the glass fiber cloth with the specific...

Embodiment 2

[0030] The preparation method of the phenolic resin-based composite sleeper comprises the following processes in sequence:

[0031] (1). Preparation of prepreg: Prepare woody residues into wood chips with a particle size of 2mm, sieve and remove impurities through an electric screener, and dry in an oven to control the moisture content below 4%; 5×15×2500mm and 5 × 15 × 220mm moso bamboo slices were polished to remove surface burrs and dirt, soaked with phenolic resin glue accounting for 28% of the total mass for 7 minutes, heated and dried after treatment, and cooled for later use; the solid weight (phenolic resin) accounted for 45% After the phenolic resin glue is atomized, it is fully and evenly stirred in the mixer with the woody residue for subsequent use. The proportion of the phenolic resin glue accounting for the total weight of the mixture is 15%, and 3% urea is added in the phenolic resin.

[0032] (2). Preparation of the surface material: fully soak the glass fiber...

Embodiment 3

[0035] The preparation method of the phenolic resin-based composite sleeper comprises the following processes in sequence:

[0036] (1). Preparation of prepreg: Prepare woody residues into wood chips with a particle size of 1-3mm, sieve and remove impurities through an electric screening machine, and dry in an oven to control the moisture content below 6%; 5×15 × 2500mm and 5 × 15 × 220mm moso bamboo slices were polished to remove surface burrs and dirt, soaked in phenolic resin glue with phenolic resin accounting for 32% of the total mass for 3 minutes, heated and dried after treatment, and cooled for later use; the solid weight (phenolic resin) accounted for 41 % of the phenolic resin glue is atomized and fully and evenly stirred with the woody residue in a mixer for subsequent use. The proportion of the phenolic resin glue to the total weight of the mixture is 17%, and 5% urea is added to the phenolic resin.

[0037] (2). Preparation of the surface material: fully soak the ...

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Abstract

The invention provides a preparation method of a sleeper, which solves a problem that a composite material sleeper is not available in the prior art. A preparation method of a phenol-formaldehyde resin based composite material sleeper comprises processes of prereg preparation, surface material preparation and composite material preparation in sequence. According to the invention, as a large quantity of wood residues are utilized, low cost and good use performance are achieved, defects of a cement sleeper are overcome, saving and substitution of woods are developed, the wood consumption structure is optimized, the situation of domestic wood resource shortage is relieved to a certain degree, and sustainable utilization of forest resources and the ecological environment are improved.

Description

technical field [0001] The invention relates to a preparation method of a phenolic resin-based composite material sleeper. Background technique [0002] my country is one of the countries with relatively poor timber resources in the world, but it is indeed a large timber consumption country, and the contradiction between supply and demand of timber has always been very sharp. How to maximize the use of forest biomass to produce more wood substitute products for national economic construction is a major issue for forest industry and scientific and technological workers. my country's timber comprehensive utilization level and utilization rate are relatively low, especially the utilization rate of remaining forest resources is even lower, which is only about 40% of that of forest industry developed countries. The full utilization of forest resources and the production of high value-added products, especially the R&D and production of products urgently needed for national econo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B27K3/36B27N3/08
Inventor 肖生苓王桂英王维孙月
Owner NORTHEAST FORESTRY UNIVERSITY
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