【Popular Science on Polymers and Materials】--011 Ironing Clothes + zdl1966
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This post was last edited by ljtjbx on 2015-11-9 07:56. In daily life, some people wear their clothes neatly and neatly pressed, while others do not look as presentable. The reason for this difference in appearance lies not only in daily care such as ironing, but also in the choice of fabric – cotton, linen, synthetic fibers, and blends. Cotton and linen are difficult to set in shape; they need to be washed and ironed after each use ； Fiber setting is quite stable, allowing it to last forever ； Blends fall between the two. Chemical fibers are easy to set because they are linear-chain polymers; once set, no molecular chain sliding occurs within them as long as the temperature remains within a certain range. And some clothes, although they appear stiff, shrink at the seams; this is because the thread used for sewing is synthetic, and high water temperatures during washing cause the sewing thread to shrink and rebound. As long as you pull firmly while ironing until the temperature drops, it will set its shape. And why don’t chemical fabrics show as large changes in properties as woven fabrics? That’s because the synthetic fibers in those fabrics have been modified, making them much less sensitive to temperature.
Chemical fibers are easy to set because they are linear-chain polymers; once set, no molecular chain sliding occurs within them as long as the temperature remains within a certain range. I’ve learned this already!
It just shows that the standard of living hasn’t reached that level yet. Hehe
I hardly ever wear shirts; I opt for casual clothing instead. Actually, I think for the quality of life, it’s most comfortable to be bare-chested. {:1_90:}
Bare-chested, what a bold person! One has to learn how to iron clothes!
Uh, it seems like there’s so little ironing done these days. It’s indeed not used very often, but it’s always good to learn a little. Thanks to the original poster for sharing this