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The Definition of Non-Woven Rolls

Key to the success of new roll cover materials is its resiliency.

From: Date: 2013-12-25 03:08:36Views: 1409

Key to the success of new roll cover materials is its resiliency. Some new non-woven materials are constructed of synthetic fibers engineered to control the fiber chemical composition, shape, diameter, and lengths. These fibers are then purposefully entwined together through various processes to form a web. These fibers are combined with engineered polymer binder material that adheres the fibers together to create a fabric matrix. How this matrix takes shape is a key factor in the fabric’s ability to retain dirt, control oil films and resist blinding off or becoming ‘clogged’ based on the amount of void or open structure remaining in the fabric.

These newer fabrics, which retain their void at higher hardnesses when converted into an automotive blank washer roll, provide exceptional coefficient of friction properties that eliminate or greatly reduce hydroplaning, which provides better fluid controls and dirt pick-up. Automakers are finding the composition of newer non-woven roll surface to be far superior to that of traditional, older varieties of fabric surfaces. Consider the fact that tailor-welded blanks typically used in structures and not outer body panels utilize dimples in various locations to aid in keeping the dissimilar thicknesses of the blanks level when stacked. When these dimples repeatedly pass through the roll bite in older varieties of fabrics they assault the fabric surface and create a permanent impression on the roll face. In some cases, the pattern will elevate to deep impressions and can rip the fabric’s fibers or permanently deform the roll surface. This condition presents serious issues when outer panel processing follows running a tailor-welded blank through the same press line. These deep impressions carry fluid past the roll bite and cause oil streaks on the blanks that. when formed in a press, create fluid impressions in the steel. When permanent damage occurs in traditional fabrics the only courses of action are either to replace sections or all of the roll cover or to grind the roll to even out the surface. With modern non-woven roll materials, the surface disruption or damage can correct itself through the resilience and elastic memory of the fabric construction. 

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