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
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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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