In recent years, outdoor sports are very popular, such as mountaineering, hiking, cycling, Cross country running, and so on. Usually, before engaging in such activities, everyone prepares a diving suit to cope with unpredictable weather, especially sudden heavy rain. A diving suit with excellent waterproof performance is a reassuring guarantee for outdoor enthusiasts. So do you know how much rain your stormtrooper outdoor clothing can withstand?
An important indicator of the waterproof performance of protective clothing such as assault suits is the hydrostatic pressure, which is the resistance of fabrics to water penetration. Its importance lies in its ability to reflect to some extent the ability of people to resist rainwater penetration when wearing such clothing for exercise on rainy days, under high altitude and high pressure conditions, or when carrying heavy loads or sitting down, protecting people's inner clothing from being soaked, thereby maintaining a comfortable state of the human body. Therefore, in order to attract consumers, the outdoor clothing currently on sale in the market usually claims its waterproof index, such as 5000 mmh20, 10000 mmh20 and 15000 mmh20, and at the same time, it will publicize words like "rainstorm level waterproof". So what is its claimed index, "moderate rain proof", "heavy rain proof" or "rainstorm proof"? Let's analyze it.
In life, we often divide the rain regime into light rain, moderate rain, heavy rain, rainstorm, heavy rainstorm and extremely heavy rainstorm. First, combining the rainfall grade published on the official website of the China Meteorological Administration and its relationship with hydrostatic pressure, we get the corresponding relationship in Table A below. Then, referring to the evaluation standards in GB/T 4744-2013 Testing and Evaluation of Textile Waterproof Performance, we can get the following:
Moderate rain grade waterproofing: It is recommended to have a resistance to static water pressure value of 1000-2000 mmh20
Heavy rain level waterproofing: It is recommended to have a static water pressure resistance value of 2000-5000 mmh20
Rainstorm waterproof: the recommended hydrostatic pressure resistance value is 5000~10000 mmh20
Heavy rainstorm level waterproofing: the recommended hydrostatic pressure resistance value is 10000~20000 mmh20
Extremely heavy rainstorm (torrential rain) waterproof: the recommended hydrostatic pressure resistance value is 20000~50000 mmh20
Note:
1.The relationship between rainfall and rainfall intensity is sourced from the official website of the China Meteorological Administration;
2.The relationship between rainfall and hydrostatic pressure (mmh20) comes from 8264.com;
3.The classification of resistance to static water pressure shall refer to Table 1 of the national standard GB/T 4744-2013.
I believe that by comparing the above values, you can easily understand the rainproof level of outdoor clothing similar to submachine jackets through the merchant's annotations. However, it is not always necessary to choose products with higher waterproof levels. It is recommended that friends choose appropriate waterproof products based on different usage scenarios: long-distance heavy hiking, high-altitude mountain climbing - such activities require carrying heavy backpacks, Extreme rainy and snowy weather, outdoor clothing such as stormtroopers, may be soaked in backpack pressure, resulting in a risk of overheating. Therefore, outdoor clothing worn for such activities should have high waterproof properties. It is recommended to choose clothing with waterproof level of rainstorm or even heavy rainstorm (the hydrostatic pressure is declared to be at least 5000 mmh20 or above, preferably 10000 mmh20 or above). Single day hiking - moderate amount of exercise for single day hiking, without the need for high-intensity sweating; Due to the fact that carrying a lightweight backpack can put some pressure on a stormsuit in rainy weather, outdoor clothing such as a one-day hiking stormsuit should have a moderate level of waterproofing. It is recommended to choose clothing that is waterproof to heavy rain (with a declared hydrostatic pressure between 2000 and 5000 mmh20). Off road running activities - Off road running has very few backpacks, and on rainy days, backpacks put less pressure on outdoor clothing such as sprinters, so the waterproof requirements can be lower. It is recommended to choose clothing that is waterproof to moderate rain (with a declared hydrostatic pressure between 1000-2000 mmh20).
The detection methods involved include:
AATCC 127 Water Resistance: Hydrostatic Pressure Test;
ISO 811 Textiles — Determination of resistance to water penetration-Hydrostatic pressure test;
GB/T 4744 Testing and Evaluation of Waterproofing Performance of Textiles - Hydrostatic Method;
AS 2001.2.17 Methods of test for textiles, Part 2.17: Physical tests - Determination of resistance of fabrics to water penetration - Hydrostatic pressure test;
JIS L1092 Testing methods for water resistance of textiles;
CAN/CGSB-4.2 NO. 26.3 Textile Test Methods - Textile Fabrics - Determination of Resistance to Water Penetration - Hydrostatic Pressure Test.
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Post time: Aug-08-2023