Chemical treatments are required to provide water resistance to the fabrics used in rainwear, umbrellas, and tarps. The coating used for waterproofing lasts for a long time. Finishes that are water resistant are different from those that are waterproof. If this is true, then the fabric will remain dry even if it is sprayed with water for a short period of time.
Water Proof Finish
It is still important to define the degree of water resistance of the finish. Due to the role that it performs, there is a significant variation in the duty rate that applies when exporting to the United States.
Please take the time to read the following because it is essential:
In the event that the fabric is TC and the waterproof finish is nothing more than a basic waterproof finish that does not pass the Rainwater Test, the import on jackets is 34%. When an identical cloth that has been subjected to waterproof treatments and passed a test for its ability to withstand precipitation. Despite this, it has been reported that the charge would be decreased to 7.6%.
As part of the AATCC-35, fabrics must be able to endure 600mm of water pressure in a Cup Test without leaking.
Almost all textile finishing factories are familiar with the aforementioned test and the required waterproof quality to qualify for rainstorm duty. It’s crucial to provide detailed instructions when placing a fabric purchase.
Advantages
A drastic duty hike from 7.6% to 34% is plain to see. If you want to take advantage of the lower duty rate, you must use a properly rated waterproof coating. Remember that the jacket’s design, not just its waterproofing, is crucial. But even if the fabric passes the most basic tests for water resistance, it may still fail in practice. It’s probable that the United States Customs Service won’t allow you to classify the jacket as rainwear duty free because of how it’s made. The following are some potential problems with the jacket’s construction that would render it unfit for use as rain gear.
- Due to the fact that quilting is done on the outside, it is possible for water to readily penetrate the padding due to the many needle holes.
- Because of the linked nature of the construction, there is a significant possibility that water may leak into areas that do not include flaps. It is possible for water to enter the structure via the fissures.
- Within the limits of the water-repellent coating that the garment has
Water Repellent Finish
It’s important to note the difference between water-resistant and waterproof coatings. If what you claim is true, the cloth will remain dry even after being sprayed with water or left out in the rain for a short period of time. A lot of water might soak through the fabric if the rain keeps coming down.
Easy access
The following procedure may be used to assess if the fabric has a water-resistant finish (W.R), a waterproof finish (W.P), or no finish (basic finish) at all:
- Place the cloth on a flat surface, and then pour water over it until it is completely soaked.
- If water beads up on one side of the fabric. It indicates that one side of the cloth possesses water repellency.
- Now, gently run your fingertip through the water. This fabric is bidirectional, with W.P. on the reverse side if the light is blocked from traveling through to the other side. Also, W.R. on the reverse only if light travels through to the other side.
- “Simple finish,” as opposed to W.R. or W.P., describes fabric that rapidly absorbs water and allows it to flow through to the other side (fully wet).
- A W.P. finish is present if water does not roll off but rather sticks to the fabric. Also, it does not soak through when rubbed. When the cloth has W.P. on one side, it’s quite probable that it also contains W.R. On the other hand W.R. is on the other side. Flip it over and see whether water rolls when you pour water on it to verify your theory.
- To take a breather in the midst of processing the material is an indicator of success. It’s not W.P., no matter how hard you try. Some things are considered impermeable because they prevent air from passing through them.
Epilogue
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