HUEC 2040-CH. 24 OUTLINE

HUEC 2040-CH. 24 OUTLINE - CHAPTER 24 PHYSICAL/MECHANICAL...

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CHAPTER 24- PHYSICAL/MECHANICAL FINISHES - Finishing process may: o Enhance aesthetics o Change appearance, hand, and/or texture of material o Improve performance in resisting challenge such as flames, dirt, moths, or water o *both can be changed by finishes consisting of mechanical manipulation OR app of chemical - Treatments may be—durable, semi-durable, OR nondurable—to washing OR dry cleaning  treatments o What qualifies as “durable” depends on how critical finish is o Nondurables useful for items not washed, for temporary changes, OR simply to provide  aesthetic benefit @ point of sale - SURFACE FINISHES - Calendering o Calendaring— general term referring to mechanical finishes achieved by pressing fabrics  between series of two or more rollers o Object is to smooth fabric and/or create interesting surface effects o Ltd durability when applied to cellulosic materials BUT durability can be increased when  calendaring is carried out w/chemical resin treatment o Use of heated rollers makes calendaring durable on thermoplastic fibers o Not usually applied to woolen or worsted fabrics o Simple Calendering     Simplest form—comparable to ironing fabric Calendar rolls heated o Schreinering    
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One of calendar rolls embossed w/about 250 fine, diagonal lines/in.  this passes over  Thermoplastic tricots treated to enhance surface luster o Glazing     Friction calendar— special calendar that produces fabrics that have highly glazed OR  polished surface Ex: chintz or polished cotton Before fabric passed through calendar, cloth is saturated w/either starch OR resin fabric  slightly dried then fed into machine in which rapidly moving, heated roller polishes  surface of more slowly moving fabric Starch—temporary finish Resin—durable finish o Cire‘ing     Cire`  fabrics characterized by high surface polish the wet look —fashion term; describes cire` made by much same process as friction calendaring heat-sensitive synthetics given permanent wet look when thermoplastic fibers fuse  slightly under heat of rollers when hydrophobic fibers given finish, some degree of water repellency results result of slight glazing OR fusing that fabrics undergo
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HUEC 2040-CH. 24 OUTLINE - CHAPTER 24 PHYSICAL/MECHANICAL...

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