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- Time of issue:2020-12-24 15:54
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(Summary description)Jackets, also known as windbreakers or raincoats (PIZEX in English), are one of the essential equipment for outdoor sports enthusiasts. Just like its name, charge, whether you are doing mid-to-long-distance hiking and mountain climbing, or professional adventure, ice climbing, or even climbing seven or eight kilometers of snow-capped mountains, an "all-weather" jacket that suits you is yours. The must-have choice! Do you know how the waterproof and breathability of the jacket is calculated and measured?
(Summary description)Jackets, also known as windbreakers or raincoats (PIZEX in English), are one of the essential equipment for outdoor sports enthusiasts. Just like its name, charge, whether you are doing mid-to-long-distance hiking and mountain climbing, or professional adventure, ice climbing, or even climbing seven or eight kilometers of snow-capped mountains, an "all-weather" jacket that suits you is yours. The must-have choice! Do you know how the waterproof and breathability of the jacket is calculated and measured?
- Categories:Company News
- Author:
- Origin:
- Time of issue:2020-12-24 15:54
- Views:
Jackets, also known as windbreakers or raincoats (PIZEX in English), are one of the essential equipment for outdoor sports enthusiasts. Just like its name, charge, whether you are doing mid-to-long-distance hiking and mountain climbing, or professional adventure, ice climbing, or even climbing seven or eight kilometers of snow-capped mountains, an "all-weather" jacket that suits you is yours. The must-have choice! Do you know how the waterproof and breathability of the jacket is calculated and measured?
There are two calculation methods for the ventilation target: 1. RET value: Calculate the resistance of water vapor to penetrate clothes. The smaller the RET value, the smaller the resistance, the more breathable it is. RET value less than 6 is attributed to high air permeability. 2. Water vapor transmission rate (MVTR): refers to how much water vapor can be transmitted per square meter of fabric every 24 hours. The MVTR value of expanded polytetrafluoroethylene (ePTFE) fabric is generally above 5000g/㎡/24h. The air permeability index of polyurethane (PU) coated fabric, taking TNF's HYVENTDT fabric as an example, is generally marked at 700g/㎡/24h.
The goal of waterproofing is not measured by the amount and volume of water that can be prevented, but by the amount of water pressure that can be accepted. The definition of waterproof should be: it can be called waterproof if it can accept high water pressure for a long time without water leakage. A good expanded PTFE WBW fabric can accept a water pressure of 28m-45m, that is, a water pressure of 28000mmHg-45000mmHg. When we are doing outdoor activities, the water pressure generated by some actions are: when sitting, the water pressure on the hips is 2-3 meters of water pressure; when kneeling, the water pressure on the knees is 3-9 meters of water pressure When backpacking, the water pressure on the shoulders is 6-14 meters.
Waterproofness and breathability are a pair of contradictory pairs. A product cannot claim that its waterproofness and breathability are both the best together. It can only find a balance between waterproofness and breathability. Planning for outdoor activities and outdoor environment characteristics.
