As people pay increasing attention to the quality of air, how to obtain clean air has become a matter of concern to consumers and filter manufacturers. Filters are needed to remove pollutants and impurities from the air in homes, cars, laboratories, production workshops, and other places. Therefore, the demand for filters is also increasing year by year.
The filter is mainly composed of filter materials and frame materials, which require the use of adhesives to bond them together. Considering that filters often work in special environments (high and low temperatures, high humidity, etc.), filter manufacturers usually choose hot melt adhesives for bonding.
What is filter hot melt adhesive
Filter hot melt adhesive is a kind of hot melt adhesive used in the production of filters. It is used for folding and shaping filter paper, bonding filter paper to the frame, and fixing and bonding the frame. Different filter application scenarios have different requirements for hot melt adhesive. According to the chemical composition of hot melt adhesive, common filter hot melt adhesives include EVA, PO, PA, etc.
EVA filter hot melt adhesive is ethylene vinyl acetate hot melt adhesive. This system of hot melt adhesive has excellent bonding adaptability and can bond a variety of different materials. The cost is the lowest compared to other systems, so it is deeply loved by filter manufacturers. The disadvantage is that it has a little odor. It is not recommended to use this type of filter hot melt adhesive in situations where odor is required.
PO filter hot melt adhesive is polyolefin hot melt adhesive. This system of hot melt adhesive has excellent bonding strength and flexibility and has no smell. This advantage of no smell is very popular among sellers and is often used in household and air conditioning filters.
PA filter hot melt adhesive is polyamide hot melt adhesive. This system of hot melt adhesive has the characteristics of high temperature resistance, oil resistance, and aging resistance, and is often used in automotive oil filtration. The disadvantage is that it is relatively expensive and is only suitable for use in filters in special scenarios.
Why do filters use hot melt adhesive to bond
In the filter manufacturing process, hot melt adhesive is the most popular and widely used adhesive type on the market. This is because hot melt adhesive has many advantages over other types of adhesives, such as:
High production efficiency
Hot melt adhesive melts at high temperatures and solidifies immediately to form bonding force when the temperature drops. Therefore, manufacturers only need a few seconds to complete the bonding of a filter, which greatly improves production efficiency.
Wide adaptability
Hot melt adhesive can bond a variety of substrates, such as filter paper, plastic, activated carbon, filter screens, etc.
High flexibility
After the hot melt adhesive is cured, the adhesive film has a certain degree of flexibility, which can improve the filtration efficiency of the filter paper folding and bonding process.
Green and environmentally friendly
Hot melt adhesive is a fully solid adhesive, which is safer and more environmentally friendly than other types of adhesives.
Easy to use
Hot melt adhesive can be used whether it is applied manually or by machine, which reduces the complexity of factory filter production.
How to choose filter hot melt adhesive
After the filter manufacturers understand the advantages of hot melt adhesive, we will share with you how to choose filter hot melt adhesive from the perspective of the manufacturer:
Types of hot melt adhesive
According to the different usage scenarios of the filter, when choosing hot melt adhesive, manufacturers should focus on the characteristics of the glue, such as: high and low temperature resistance, odor, oil resistance, price, etc. After understanding the specific parameter requirements of the filter, you can choose the corresponding type of hot melt adhesive, such as: EVA, PO, PA, etc.
Filter technology
The second step is that filter manufacturers need to know the type of bonding. The common types on the market are: bonding at the fold of filter paper, bonding between filter paper and frame, bonding to fix filter frame, bonding on filter plane, etc. Different bonding processes correspond to different hot melt adhesive systems and formulas.
Type of production
At present, the production types of filters are divided into two types: manual and fully automatic. Different production types require different curing times for hot melt adhesives. For example, the production speed of fully automated filter manufacturing is very fast, and it needs to be cured immediately within 5-10 seconds, which requires the hot melt adhesive to be cured in a short time.
Price
Price is a key factor for filter manufacturers to choose hot melt adhesive because it is related to the cost of the product. Choosing a hot melt adhesive manufacturer with scale and application experience, such as Blue Rhino Adhesives, can not only obtain high-quality products but also get lower prices.
The above four factors (hot melt adhesive type, filter process, production type, price) are the key indicators for how to choose filter hot melt adhesive. As a professional Chinese filter hot melt adhesive manufacturer, Blue Rhino Adhesives can consult us if you have any questions about the selection and use of filter hot melt adhesive, and we will answer your questions immediately.
