Waterproof, water repellent, & water resistant terms comparison

WATERPROOF, WATER REPELLANT, & WATER RESISTANT TERMS COMPARISON

 

Bila kita dengar istilah waterproof, apa yg mula2 skali triggered? Kebanyakkan akan ingat term ni refer kepada bahan atau material yg kalis air, senang cakap benda yg tak lut air laa (mcm plastic, canvas etc). Untuk material fabric (kain) biasa term2 biasa dengar mcm “waterproof”, “water repellant”, & “water resistant”. Ramai yg igt benda ni sebenarnya sama = “kalis air”.

Bergantung kpd product atau industry yg dibincangkan, sebenarnya 3-3 term tadi ada maksud yang berbeza. Kat sini sy cuba explain apa maksud “water-proof” dan beza antara  “water repellant”, & “water resistant”.


Water resistant :

To a certain degree, apa2 material yg bila kena air tak terus serap/basah (cth: jackets, jeans) adalah water resistant. Kecuali yg guna material cotton (mcm t-shirt) yg terus serap air mcm span tu kita xkira water resist. Utk consider sbg  “water resistant” standardnya simple je. Asalkan material tu bleh halang air up to certain level, dia dh dikira sebagai water resistant (xserap air dgn serta merta). Maksudnya water resistant ni tetap akan basah klu terdedah dgn air lbh dr level yg dia bleh tahan. Dan bila dh basah tu, xsemestinya dia cepat kering.


Waterproof:

Untuk “waterproof” plak, ia telah diuji supaya mempunyai tahap tertentu rintangan air. Tapi, there’s a catch. Buat masa skg ni, tak ada standard piawai industry macamana material tu boleh di classify sebagai level waterproof. So just be little cautious about this, mungkin ada manufacture yg akan claim product dia waterproof tp bila hujan lebat end up akan basah jg. Ni xbermaksud yg jeket td tak waterproof, cuma dia xde la proof smp level yg kita expect.  Material waterproof ni byk jenis (canvas, ripstop, nylon), kebiasaannya akan di “coated” utk elakkan serap air. Tp kena igt, waterproof term ni xsama ikut product/industry mn yg nk discuss. Contoh macam “waterproof camera” totally lain maksudnya dgn “waterproof jacket”. Klu berenang pki waterproof jacket ni mungkin akan end up basah lenjun.

 


Water repellant :

“Water repellant” ni plak ada category dia sendiri. Term repellant ni merujuk kepada coating yg digunakan pd kedua-dua material “waterproof” & “water resistant” tadi. Coating ni gunanya utk bagi effect macam daun keladi dekat kain tadi spy air xkan meresap masuk. Walaupun coating ni xkan buat material tu 100% waterproof, tp at lease dia akan improve water resistant level material tu. Jd anything yg ada coated DWR (Durable Water Repellant) biasanya akan lebih tahan dlm cuaca buruk compare dgn yg xde coating ni. Disebabkan ianya hanya coating, jd lama-kelamaan coating ni akan wear-off & effect daun keladi td makin berkurangan. Jd penting masa nak basuh tu sila ikut product specification (washing tag). So klu dh wear-off, sbnrnya kita bleh re-apply coating tu balik. Nnt saya akan story macamana nk DIY re-apply water repellant coating ni.

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