What kind of glue is good for plywood production
Plywood, as an important material widely used in the furniture, construction, and decoration industries, the selection of adhesive in its production process is crucial. Adhesive not only determines the strength and durability of plywood, but also directly affects the environmental performance and health safety of the product.
Firstly, we need to understand the commonly used types of adhesives in plywood production. At present, the mainstream adhesives in the market mainly include urea formaldehyde resin adhesive, MDI adhesive, and soybean adhesive. These adhesives each have their own advantages and disadvantages, and are suitable for different production needs.
Urea formaldehyde resin adhesive is a thermosetting polymer adhesive with inexpensive raw materials, high bonding strength, colorless and transparent properties. It is widely used in the production of artificial boards such as plywood, particleboard, and medium density fiberboard. However, the formaldehyde content in urea formaldehyde resin adhesive has raised doubts about its environmental performance. Although the cured urea formaldehyde resin is resistant to weak acids and bases, has good insulation performance, and excellent wear resistance, it is prone to decomposition when exposed to strong acids and bases, has poor weather resistance, and the amount of formaldehyde released may pose a threat to human health. Therefore, many large sheet metal manufacturers have gradually phased out this adhesive.
MDI adhesive, also known as diphenylmethane diisocyanate adhesive, is an environmentally friendly adhesive that does not contain formaldehyde. It has high bonding strength, insolubility in water, and excellent moisture resistance, which can provide stable bonding effect and maintain stable performance even in humid environments. MDI adhesive has high environmental performance and meets the requirements of modern home decoration for environmental protection and health, so it is increasingly favored by board manufacturers. However, the cost of MDI adhesive is relatively high, which increases production costs.
Soy glue is an environmentally friendly adhesive made from soy protein, which does not contain volatile organic compounds (VOCs), does not pollute the environment, and is harmless to human health. Soy glue has excellent adhesion and durability, suitable for bonding various materials, and is biodegradable, without causing solid waste pollution to the environment. However, compared with MDI glue, soybean glue has problems such as large dosage, slightly poor flowability, and poor waterproofing during use, and its bonding strength is not as good as MDI glue. Therefore, the price of soy glue is relatively low, but it may not meet the requirements in the production of some high-end boards.
When choosing glue for plywood production, in addition to considering the performance, environmental friendliness, and cost of the glue, it is also necessary to comprehensively consider the specific production needs. For example, for boards that require high moisture resistance and environmental protection requirements, MDI adhesive is a better choice; For boards with limited cost and low environmental requirements, soybean glue or improved urea formaldehyde resin glue can be considered.
In addition, with the increasing awareness of environmental protection and health among consumers, more and more board manufacturers are paying attention to the environmental performance of adhesives. Therefore, when choosing glue, it is also necessary to pay attention to its environmental indicators such as formaldehyde emissions, to ensure that the product meets relevant standards and regulatory requirements.
The selection of high-quality adhesive in plywood production requires comprehensive consideration of multiple factors such as adhesive performance, environmental friendliness, cost, and production requirements. By selecting and using glue reasonably, high-quality, environmentally friendly and healthy plywood products can be produced to meet market demand and consumer expectations.
