Ateva® EVA and LDPE polymers are used to precoat the back of carpets to lock the fiber tufts to the scrim. For this application, usually high MI EVA (VA content of 18%) or LDPE polymers are chosen, with good balance between the adhesive and cohesive strength of the polymer. To improve wear, a higher MI helps penetration of the melt through the carpet fibers, and higher adhesion is achieved by increased VA content.

Heavily filled flexible compositions have been found to be very useful in dampening vibration and absorbing sound. EVA polymers, with their ability to accept up to 80% by weight of fillers, have found successful application in this area. The two types of material are massback and sound deadening.

Massback is the term applied to a highly filled EVA which is applied beneath the automotive carpet, and in some cases, directly extruded onto the precoat. The massback layer is used as a sound barrier between the engine and the passenger compartment. The requirements of the filled compounds are sound deadening properties, thermoformability, and good flexibility over a wide temperature range. High VA content EVA is an ideal base resin for this application since its polarity allows good compatibility with high levels of filler. Similar compositions are also made into smaller-sized individual sound deadening components.

These are strategically placed in high noise areas of an automobile including fender wells, inside doors, or under the dashboard. Furthermore, an absence of plasticizers helps to prevent window fogging. 

Gasketing is another automotive application for Ateva® EVA copolymers. EVA is a component of crosslinked compounds and foams which are starting to find increasing use due to their rubbery nature and heat and ozone resistance. 

For Product Specification or more information please feel free to contact : Molding & Extrusion Representative or call 1-800-661-3663

Hose, Tubing, Pipe & Profile Extrusion Applications - Ateva® EVA copolymers are also found in hose and tubing for beverages and agricultural fertilizer, applications that require hose flexibility over a wide range of temperatures. EVA grades with 9% to 12% VA content are typically used and extruded through annular dies into sizing rings in vacuum tanks. EVA grades with 7% to 12% EVA are used for spiral-wound vacuum and swimming pool hose.The spiral-wound method produces a hose with superior flex-life and crush resistance. Chemical and environmental stress-crack resistance are critical, as is low toxicity.

For Product Specification or more information please feel free to contact : Molding & Extrusion Representative or call 1-800-661-3663