A kind of preparation method of composite material glued wood

Abstract

This application discloses a preparation method of composite glued wood, which consists of Douglas pine, Ponderosa pine wood-plastic composite sheet, iron pine, bamboo-plastic composite sheet and Southern pine sequentially glued, laminated and hot-pressed; the finished product has high strength, Compared with conventional fast-growing poplar glulam, the tensile strength of the product is increased by 50-60% in the longitudinal direction, 55-65% in the transverse direction, 45-55% in bending strength, and 50-60% in flexural modulus; impact Strength increased by 45‑55%, fire resistance, insulation, good carbonization performance, thermal deformation temperature increased by 20‑30%; creep deformation reduced by 40‑50%, waterproof, no cracking, no deformation, flexible shape design, sound insulation performance Good; tensile modulus increased by 55‑65%, good thermal insulation performance, preventing cold and thermal bridges; good mechanical properties, high bending stress, small internal stress, anti-corrosion and insect-proof, large dimensional freedom, meeting the requirements of span and section shape , the elongation at break increased by 5‑25%.

Description

technical field [0001] The invention relates to the technical field of glued wood, in particular to a method for preparing a composite glued wood. Background technique [0002] Glulam, known as glulam in Japan, is a commonly used wood structure building material. It can be made into long-span curved beams and is widely used in the manufacture of gymnasiums and large public clubs. Together with wooden I-beams and laminated veneer lumber, it is one of the three main engineering timber products. It is a kind of engineered wood made of smaller-sized solid wood sawn timber, which is bonded along the grain direction with a cold-curing adhesive. [0003] Glulam is a high strength-to-mass ratio, beautiful and degradable engineering composite material, and is widely used in bridges, construction and other engineering fields. Larix is ​​widely distributed in my country, with abundant yield and high strength, which is suitable for industrial processing and utilization of wood. [00...

AI Technical Summary

Problems solved by technology

[0006] This application aims at the existing technical problems, and provides a preparation method of composite glued wood, which solves the technical problems of the existing glued wood such as low strength, non-waterproof, poor insect-proof effect, low hardness and low toughness.