The production process of Waterproof Acoustic vents

There are three main types:

1. Tape lamination

This process uses plastic particles to hot-melt and then relies on the viscosity of the plastic itself to compound. The disadvantage is that it is almost airtight.

As of 2014, no one in the world has been able to use this process to produce truly highly breathable, high-temperature resistant Waterproof Acoustic vents.

2. Spray glue or scrape glue lamination (hot melt glue lamination)

This process was first used in sanitary napkins, diapers, and protective clothing. At present, almost all domestic manufacturers use this process to produce highly breathable waterproof and breathable materials.

The disadvantage is that the air permeability is relatively low, because the micropores of the middle breathable film are actually blocked by hot melt glue.

In addition, the most fatal shortcoming is that the temperature resistance is very low and can only withstand temperatures of 60 degrees. Because this glue is actually a pressure-sensitive adhesive (self-adhesive).

A simple example is that in winter, double-sided tape has almost no stickiness and will delaminate. But in the summer, the glue on the surface of the double-sided tape will melt. The quality of Waterproof Acoustic vents made with this process can be imagined.

During construction, as long as there is a certain temperature, the non-woven fabric will open and stratify.

3. Hot pressing compound

At present, the domestic market is a mixed bag. There are actually very few manufacturers that produce genuine Waterproof Acoustic vents. Many factories or sellers promote their Waterproof Acoustic vents as good, but almost most users have never thought of it. The Waterproof Acoustic vents provided by some manufacturers are not waterproof at all.