Shearing is a kind of

mechanical finish Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion re ...

in which the appearance of the fabric is enhanced by cutting the loops or raised surface to a uniform and even height. The machine may have a spiral blade similar to a grass cutting machine. A Shearing machine can cut the loop or the pile to a desired level. Shearing was most commonly used to make woolens and worsted materials. It was a part of dry finishing of woolen and worsted goods. Previously, shearing was also a component of gigging or napping; when partially produced goods were exposed to shear in order to improve the impact of gigging or napping, the process was referred to as "cropping."

History

Most of the Medieval clothing and textiles were processed and finished manually. The finishing of English

Woolen Woolen (American English) or woollen (Commonwealth English) is a type of yarn made from carded wool. Woolen yarn is soft, light, stretchy, and full of air. It is thus a good insulator, and makes a good knitting yarn. Woolen yarn is in contrast t ...

s includes shearing. Shearmen were skilled artisans who used to shear the fabric by hand. Shearman's job was to nap the cloth manually, using teasels and shears to trim the pile. A silky and smooth feeling was produced by the gradual lowering of the nap. The process was referred to as "dry shearing." It was formerly be an expensive and lengthy process compared to the "wet shearing" that was a rough process. During the early 17th century, two shearmen spent two weeks dry shearing three

broadcloth Broadcloth is a dense, plain woven cloth, historically made of wool. The defining characteristic of broadcloth is not its finished width but the fact that it was woven much wider (typically 50 to 75% wider than its finished width) and then he ...

Shearing machine

"Shearing machine" is a

machine A machine is a physical system using power to apply forces and control movement to perform an action. The term is commonly applied to artificial devices, such as those employing engines or motors, but also to natural biological macromolecul ...

equipped with shearing cylinder, ledger blade, fluff exhaust, and joint seam sensors. The machine operates similarly to a lawn mower. Seam joint sensors prevent seams from being cut.

Advantages

Moleskin and

velvet Weave details visible on a purple-colored velvet fabric Velvet is a type of woven tufted fabric in which the cut threads are evenly distributed, with a short pile, giving it a distinctive soft feel. By extension, the word ''velvety'' means ...

are shorn materials in which pile is cut to a certain level. Other than imparting an aesthetic finish, shearing was also used to cut certain deformations, unwanted surface defects such as protruding yarns. In the case of polyester blends, a shearing machine is also useful for removing surface beads or naps of dyed fibers.

Sculptured effect

Shearing can also create certain effects, sculpted effects are achieved by flattening sections of the pile with an engraved roller and then the remaining upright sections are shorn off. Flattened portions are then steamed and raised. Embossed velvet and plush fabric are created by weaving the pile high and shearing it to various levels, or by pressing a portion of the pile flat.

References

{{Reflist-talk Textile techniques

History

Shearing machine

Advantages

Sculptured effect

See also

References