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Woodworking glue common knowledge explanation
Wood glue refers to the adhesive used in the woodworking industry. The industry in which woodworking glue can be applied is very extensive and not limited to the woodworking industry. Adhesives are indispensable in the woodworking industry. It is not an exaggeration to say that as long as it is used properly, it can be turned into a magical, useful to change waste materials, large-scale use of small materials, excellent use of inferior materials and full use of excellent talents. So, what are the types of wood glue? How to use wood glue properly? Let's listen to the deep woodworking glue Xiaobian for you to explain.
First, the type of wood glue 1, wood glue Glue glue is used to bond all kinds of indoor wood products, furniture. It is milky white, can be cleaned with water when it is not dry, and transparent after drying. Non-toxic, non-polluting wood. It can bond all kinds of rough wood, cloth, paper, leather and other materials (cannot bond MDF board). Wood Handmade Products Bonding or repairing furniture, wood frame, wooden benches, wooden wine racks, wooden cabinets and broken wood. 2, outdoor woodworking glue Outdoor woodworking glue is an industrial grade white latex. It can be cleaned with water when it is not dry. It is translucent after drying, can be polished, non-toxic, lacquerable and waterproof. MDF board can be bonded. Heat resistant up to 110 ° C, specially used in woodworking or manufacturing plants to bond all kinds of wood products. It is suitable for bonding all kinds of soft and hard wood, MDF medium density fiberboard, fireproof board, broken wood board and other materials, as well as various indoor furniture, wood and other bonding work. 3, polyurethane wood glue Polyurethane wood glue is a high-grade woodworking adhesive. It is brown, dry and light yellow, and will swell, so it is also suitable to bond/fill fine cracks. Non-toxic, anti-stress, acid and alkali resistance (woodworking glue will reduce the adhesion when it meets acid and alkali). After drying, it can be polished, dyed, painted, and heat resistant up to 140 °C. It is suitable to bond indoor and outdoor wood, glass, MDF board, metal, cement, porcelain, most plastic products, and can bond wood to almost all materials.
Second, the use of wood glue 1. Temperature In different seasons, it is necessary to measure the working environment temperature and wood surface temperature in a timely manner. The temperature is determined to some extent to determine how fast the cross-linking of the glue is reflected. The surface temperature of the wood is closely related to the holding time of the board. The glue can be used at different temperatures, and the time of use can be different: in the summer, the mixed puzzle can be used for 30 minutes (that is, the faster the use is better); in the winter, the mixed puzzle The glue can be used for 60 minutes. 2. Mixing agent The main agent and curing agent should be mixed strictly according to the weight ratio of 100:15, and the average should be stirred. The mixed glue should be used within the maneuverable time. It is strictly forbidden to mix wood chips, dust and other impurities or add water when mixing. It is forbidden to mix the main agent and curing agent before use. Pay attention to the seal retention after taking the glue. 3. Wood moisture content After the natural wood is rehydrated, the moisture content should be controlled within 7-12%. When the moisture content of wood is less than 7%, it may cause excessive penetration and exudation of wood, which may cause cracking due to lack of glue on the bonding surface. If the moisture content of wood is too high, it will directly lead to poor penetration and seepage, and it is difficult to form rubber nails. Crosslinking is not completely reflected, which may cause gelation. The difference in critical moisture content of wood should be controlled within 3%. 4. Wood processing accuracy Wood processing accuracy should be within 0.15mm. Wood bonding surfaces should have no processing defects such as “tapping and finishing”. The straight angle of the wood is good. There should be no such phenomena as “scratch marks, saw marks, charring” on the wood bonding surface. It is strictly forbidden to use bonded wood whose surface is contaminated by grease, dust, etc.