Jeans are a staple in everyone’s wardrobe, but have you ever wondered what happens to them after you wash them? One of the most common questions people have is whether jeans shrink or expand after washing. The answer is not as straightforward as you might think.Get more news about Shrinkless Expanding Machine,you can vist our website!
Jeans are typically made from denim, a sturdy fabric woven from cotton. Cotton fibers have natural crimp, or waviness, which allows them to stretch and then return to their original shape. When you first buy jeans, they have been pre-shrunk to minimize any further shrinkage. However, this does not mean that they will not shrink at all.
When you wash jeans, the water penetrates the cotton fibers, causing them to swell and expand. This can make jeans feel looser and slightly larger than before washing. However, once the jeans dry, the cotton fibers contract and go back to their original size, resulting in jeans that may feel tighter or smaller.
The amount of shrinkage or expansion depends on various factors, such as the type of denim, the temperature of the water, and the agitation during the washing process. Different types of denim have different levels of shrinkage. For example, raw denim, which has not undergone any washing or treatment, can shrink up to 5% in the first wash. On the other hand, pre-washed or pre-shrunk denim will shrink less or not at all. 3.Three kinds of guide holes with different center distance are arranged on the guide plate to facilitate the replacement of specifications.
4.Servo motor drives rack and gear to drive the expansion bar forward and backward. 5.Machine lifting is driven by worm wheel elevator and controlled by servo system. It can realize multi-expansive pipe with a maximum lifting stroke of 400 mm. 6.The machine is mounted on the guide plate and can move horizontally with a moving range of 2700 mm. 7.The equipment provides two operation modes: manual mode and semi-automatic mode. (1)Manual mode: Each step is manual operation. (2)Semi-automatic mode: fully automatic operation of tube expanding process, manual operation button of alignment nozzle, transverse translation and lifting according to the set distance. 8.Hydraulic expander or hand drill expander: expanding the copper pipe port before expanding the pipe to prepare for expanding the pipe. 9.Because of the different shrinkage rate of U-tube, it will cause long and short tubes after expanding, so the machine can not expand U-tube.
