Filters are an indispensable part in many devices, from consumer electronics such as refrigerators and air conditioners to vehicles such as cars, buses and even medical equipment. This is also the reason why the filter market is growing steadily, causing manufacturers to pay more attention to improving designs and updating new technologies to maximize costs at the same time. with the quality of the product.

1.WHY IS HOT MELT ADHESIVE USED IN THE FILTERING INDUSTRY?

Hot melt adhesive is commonly used in the air filtration industry thanks to the following superior properties:

● Strong adhesion: High adhesion on many different surfaces: paper, foam, plastic, and fabric. This ensures that the filter layers are tightly bonded and do not come off during use, improving air and air filtration performance.

● High temperature resistance: Works well in high temperature environments up to 200 degrees Celsius. This is important in industrial applications where filters may be exposed to high temperatures during operation.

● Resistance to environmental agents (moisture resistant, chemical resistant): good for outdoor products or in harsh industrial environments.

● Quick-drying properties: saves production time and improves productivity Contains no solvents: minimizes health risks for workers during production and use.

2. SPECIFIC APPLICATIONS OF HOT MELT ADHESIVE IN THE FILTERING INDUSTRY

a. Folding/fixing the filter media

The adhesive helps keep the membrane folds a certain distance apart, ensuring stable fluid flow and maximizing efficiency and productivity during filter operation.

b. Adheres to filter frames, housings and bases

Hot melt adhesive is used to connect the filter membrane to the pillar, frame and tray, specifically:

● For oil, lubricant, and water filters: Bond the metal or nylon base to the filter membrane

● For air filters: Bond the plastic or metal frame to the filter membrane

● For HVAC filters: Cardboard frame to filter, Bond rubber pad to base, Or use expanded foam (foam-in-place) to replace rubber pad

c. Assembling air filters and air filters: Used to fix and shape the filter, ensuring product uniformity and durability.

d. Packaging and protection of filter products: To seal filters during transport and storage, preventing dust and dirt from entering

3. SOME TYPES OF HOT MELT ADHESIVE USED IN THE FILTERING INDUSTRY

● PO glue: used in many stages of filter assembly, especially in hot air filters

● Hotmelt glue: is used to fold filter paper, fix filters, and filter frames