讨论下透气指数.请知道的朋友指教

风间忍

以往对透气指数的认识都是以单位时间的蒸发量为标准的.昨天参加GORE公司的一个培训.发现他们现在已经不按这个来衡量了.而是使用了RET值来说明.

RET值就是水气挥发率,=推动力/阻力,RET值越小说明透气越好.
GORE同时还列出了5种面料的对比.因PPT放映太快只记下3个
GORE-TEX:50.9
Sympatex:123.1
OMNI-TECH:204.6

因为GORE找的培训讲解人员水平实在有限,根本说不出所以然,加上PPT放映太快.没能记下太多的资料.特此请知道的朋友多多指教.

子靴

在的卡侬也看到了这个RET标准  问题同上

zhujie1225

http://www.8264.com/16432.html
这篇写得不错。
虽然没有提到RET值，
但还是那句话：
标称透气30，000的衣服不一定比5，000的更好，
因为它们用的是不同的测试方法。
所以的商家都希望有一种测试标准测出的结果自己第一，
别人的都不行。

天山马贼

RET值是很久以前就有的厂商用了，以下数据来自Marmot

Gore-Tex® PacLite™
PacLite™ is engineered to be lighter, more packable and more breathable than 3L Gore-Tex Classic. Smooth inside surface eliminates the need for a lining and reduces friction allowing layers to slide and creating additional freedom of movement and easy on and off.
40+ PSI
< 60 Ret, 40 typical
Spray test - 80/20
0 CFM, 100% windproof

Gore-Tex&reg; Classic
Gore-tex Classic is the workhorse of the Gore-tex family with the widest variety of available fabrics and value.
40+ PSI
2L - <110 Ret, 65 (typical)
3L - <130 Ret, 85 (typical)
<160, 110 to 130 typical
Spray test - 80/20
0 CFM, 100% windproof


Gore-Tex&reg; XCR&#8482;
The most advanced waterproof breathable technology in 20 years. Gore-Tex XCR - “extended comfort range” as used in higher aerobic activities, represents a new class of waterproof breathable technology. Through new membranes and improved lamination techniques, Gore-Tex XCR has 25% less resistance to moisture vapor transmission than Classic Gore-Tex. This translates to up to 500grams or 17oz more moisture transmitted out of your clothing system in an 8-hour period of high aerobic activity. Keeping you dryer and more comfortable. XCR products are also engineered to higher performance finished garment specifications.
Fabric textiles for XCR must have high strength to weight.
Linings must have low Ret.
In gloves, the shell fabrics must have high breathability.
40+ PSI
2L - <40 Ret, 35 typical
3L - <60 Ret, 50 typical
80/20
0 CFM, 100% Windproof

Marmot MemBrain&#8482;
Proprietary PU film laminate. Balances the best performance in breathability, waterproofness, and water repellency with excellent durability. The hydrophilic nature of the PU film reduces internal condensation and increases comfort range by reducing the chilling effect caused by converting condensation build up back into vapor. Specially formulated resin and a double application process it works better, lasts longer and reduces condensation better.

Waterproofness: 40+ PSI
Breathability: 2 layer < 60 Ret, 50 typical
JIS L-1099 B1: 2 layer - >25,000 gr/m/24 hours - (30,000gr typical)
Breathability: 3 layer - < 90 Ret, 70 typical
IS L-1099 B1: 3 layer - >20,000 gr/m/24 hours - (25,000gr typical)
Water Repellency: Spray test - 80/100
Windproofness: 0 CFM, 100% windproof


PreCip&#8482; Technology
Marmot’s proprietary PU coating technology, specially engineered for unlined garments, combines hydrophobic and hydrophilic PU with a special DryTouch Technology in a very precisely controlled multiple layer coating system. DryTouch incorporates a collagen protein in the coating with a dimensional print that reduces contact points to the skin, reducing condensation and the sticky clammy feel of most coatings.

PreCip&#8482;
Waterproofness: 30+ PSI 15,000mm
Breathability: Ret 65 typical 12,000gr/m per 24 hours
Water Repellency: Spray test - 80/20
Windproofness: O CFM, 100% Windproof

PreCip&#8482; Plus
Waterproofness: 45+ PSI 25,000mm
Breathability: Ret 60 typical 15,000 gr/m per 24 hours
Water Repellency: Spray test - 80/20
Windproofness: O CFM, 100% Windproof