High-Shrinkage Fiber

In the technical area, the high-shrinkage fibers are used primarily in the preparation of felts, which are used as supporting layers in the manufacture of i thetic leather. 

Another important advantage of high-shrinkage fibers lies in the fact that the bulk of the goods does not chai, whereas that of texturiz l fibers and yarns decreases after a certain amount of use and wear. 

Polyimide fiber n. A manufactured fiber formed from the condensation polymer of an aromatic dianhydride and an aromatic diisocyanate. The fiber is produced by dry spinning. It is a high-shrinkage fiber used in the formation of mechanically stable non-woven fabrics. These fabrics are made without binders or resins bonding apparently results from the local temperature and pressure that develop during shrinkage. 

Although in most instances it is desirable to have fibers that are dimensionally stable, in some structures it is advantageous to use mixtures of fibers that are stable with fibers that do shrink upon exposure to heat or steam. High shrinkage potential usually is built into a fiber by stretching it and not... 

Thermosets are often used in intimate contact with materials of much lower coefficient of linear thermal expansion p. A thermoset film may be coated on a surface, or sandwiched between two surfaces as an adhesive. A thermoset matrix may be filled with high-modulus fibers in aerospace structural materials and in other composite materials. A residual stress other material(s) to changes in temperature. The value of or typically reflects the balance between the driving force to produce residual stresses due to differential shrinkage upon cooling and the temperature-dependent capacity to relax these stresses. The worst such effects... 

Leads to the decoupling of molecular orientation responsible for increased modulus and strength, from oriented chains responsible for entropic shrinkage, allowing for high modulus low shrinkage fiber products. 

Comparison of Crystalline Structure of Conventional and High-Shrinkage Polypropylene Fibers... 

Orientation in Crystalline and Amorphous Regions of High-Shrinkage Polypropylene Fiber... 

High-shrinkage polypropylene fiber is mixed with conventional fibers in spinning to yield a fluffy yarn. The proportion of blending depends on the end-use. The blend ratio for mixed spinning generally include the following variations ... 

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