In recent years, adhesive as one of the auxiliary materials in household appliances production is being more and more widely used. This is mainly due to the continuous development of household appliances industry, and the requirements for the appearance and functionality of household appliances are getting higher and higher. The reasonable application of adhesive can not only meet the needs of product design, but also improve the production efficiency of enterprises and reduce the comprehensive cost.
As a kind of product for bonding and sealing, the adhesive is complementary to the common mechanical connection. With the improvement of the quality of the household appliances in recent years, some high-performance silica gel, anaerobic adhesive, polyurethane and other products have been applied to the household appliance products.
The application range of the adhesive in the home appliance production is very wide, mainly in:
In the production of washing machine, polyurethane or hot melt adhesive is needed to seal all kinds of plastic parts and metal parts.
In order to prevent the loosening of the bolt, the washing machine or the air conditioner can be locked by using an anaerobic type thread lock to reduce the use of the gasket, and the use of an anaerobic pipe thread sealant in the pipeline of the water heater instead of the raw material belt can play a more reliable sealing effect;
The high-temperature-resistant silicone rubber is used in the adhesive and sealing work of the kitchen equipment such as a microwave oven, an electric oven, a range hood and the like.
In order to look beautiful and reduce the connecting thread holes, the overall appearance of some products is also in the form of adhesive joint.
With the use of new structure and new materials in the design and production of household electrical appliances, the demand for adhesive is becoming more and more diversified, and which adhesive to choose in the process of household electrical appliances production and manufacture needs to consider many factors, such as the working condition of the product, the assembly condition, the production cost and so on, which puts forward higher requirements for the properties of the adhesive.
According to the different working conditions, the adhesive products with different curing speed can be selected, such as the parts of a certain production procedure will flow to the next step after 20 seconds of bonding, and the initial fixation time will also reach at least 20 seconds, otherwise, the production efficiency will be affected. but if some assembly process need to interval longer time, the adhesive initial fixation time too fast will affect the bonding effect, according to the assembly need if the initial fixation or table dry time is 15~20 minutes, then need another type of glue to complete this work.
In addition, the adhesive needed by different bonding materials is also different, especially in recent years, the selection of new materials for adhesive bonding effect has also put forward new requirements.
Taking polycarbonate as an example, although they all belong to PC, the adhesive with different surface properties is also different. How to bond different materials reliably will also be a direction to be considered in the future. Therefore, it is necessary to select the appropriate adhesive products according to the specific working conditions. Compared with hot melt adhesive and solvent adhesive, reactive adhesive can meet the more complex assembly requirements.
The reaction-type adhesive is the process of chemical reaction in the curing process of the adhesive, such as the most common transient is a moisture-absorbing and curing reaction-type adhesive, and its curing speed can be adjusted by changing its own reactants to meet the requirements of different operating conditions.