![]() Older generations of Dryers typically reach between 125 to 135 degrees Fahrenheit. Modern Dryers can generally reach temperatures between 155 to 165 degrees. Yes, a dryer can cause polyester to shrink. Most modern washing machines these days can reach temperatures of up to 150 degrees Fahrenheit on the high setting. The most shrinkage occurs between 155 and 175 degrees Fahrenheit but can occur as low as 140 degrees. When combined with hot water in the washer, it can cause the Polyester to shrink. The first wash cycle usually has the biggest impact on the polyester shrinking. Whilst Polyester is exposed to moisture and heat inside a washer, dryer or steamer, it can lead to shrinking polyester due to the fabric’s fibers being relaxed and returning to their original state which in most cases is smaller. But don’t be too worried, as it shrinks the fabric by less than 1 percentage of the original size. ![]() When these fibers are exposed to moisture, the fibers return to their original size as tension is released. ![]() This is commonly known as relaxation shrinkage and is most apparent during the manufacturing process when the polyester fibers are stretched. When exposed to moisture, it can slightly shrink polyester. Depending on the polyester blend, shrinkage of the fabric can be anywhere from 20% to 30% and more. Polyester is added to natural and handmade fibers such as wool to make them more resistant to shrinkage. It is quite common to see clothes made out of blended Polyesters, such as Cotton-Polyester, Linen-Polyester, Rayon-Polyester. Polyester can shrink because of 3 reasons: Polyester Blends For example, when washed at a high temperature in the washing machine, it can cause shrinkage. Shrinkage in Polyester usually occurs when misused or washed extensively against the recommended washing instructions. Polyester is made of synthetic fabrics that normally don’t shrink due to its resistance properties. Yes, Polyester can shrink but it’s quite resistant to it.
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