Nonwoven Hollow Fibers to Improve Cars Interior Acoustic Properties
RJTA Vol. 16 No. 3 Aug 2012
Using Nonwoven Hollow Fibers to Improve Cars Interior Acoustic Properties Abdelfattah, A. Mahmoud1, Ghalia E. Ibrahim2* and Eman R. Mahmoud3 1 Acoustic Department, National Institute for Standards, Giza, B.O.136, Code no. 12211, Egypt 2,3 Spinning, Weaving and Knitting Department, Faculty of Applied Arts, Helwan University, Egypt
ABSTRACT
This research aims to produce nonwoven fabrics that can be used in car interior components (head liners, doors, side panels and trunk liners) to prevent noise from reaching the passenger compartment and therefore achieving comfort in the car interior. Two kinds of fibers were used, polyester and hollow polyester fibers, both of 6 denier, to produce three different fabrics of 100% polyester fibers, 75% polyester/25% hollow polyester fibers, and 55% polyester45% hollow polyester fibers. Four fabric weights were produced: 300, 400, 500 and 600 g/m2. All samples were bonded using thermal bonding technique. More results were reached and most samples have achieved the expected results for example, samples produced with high percentage of hollow fibers have recorded the highest rates of sound absorption whereas samples produced with 100% polyester fibers have recorded the lowest rates. It was also found that there is a direct relationship between weight per m2 and sound absorption efficiency. Samples produced with 55% polyester/45% hollow polyester fibers and 600 g/m2 have achieved the best results. Keywords: Nonwoven Fabrics, Hollow Fibers, Cars Interior Acoustic Properties, sound Insulation
1.
Introduction frequently used in automotive interiors to reduce heat levels (Imfeld et al.) as customers expect more comfort, better safety, good appearance (both externally and internally), high performance and good fuel mileage (Mukhopadhyay, 2000). Textiles make a major contribution towards realizing customers’ expectations due to their advantages which made textiles a preferable material because of
Using Nonwoven Hollow Fibers to Improve Cars Interior Acoustic Properties Abdelfattah, A. Mahmoud1, Ghalia E. Ibrahim2* and Eman R. Mahmoud3 1 Acoustic Department, National Institute for Standards, Giza, B.O.136, Code no. 12211, Egypt 2,3 Spinning, Weaving and Knitting Department, Faculty of Applied Arts, Helwan University, Egypt
ABSTRACT
This research aims to produce nonwoven fabrics that can be used in car interior components (head liners, doors, side panels and trunk liners) to prevent noise from reaching the passenger compartment and therefore achieving comfort in the car interior. Two kinds of fibers were used, polyester and hollow polyester fibers, both of 6 denier, to produce three different fabrics of 100% polyester fibers, 75% polyester/25% hollow polyester fibers, and 55% polyester45% hollow polyester fibers. Four fabric weights were produced: 300, 400, 500 and 600 g/m2. All samples were bonded using thermal bonding technique. More results were reached and most samples have achieved the expected results for example, samples produced with high percentage of hollow fibers have recorded the highest rates of sound absorption whereas samples produced with 100% polyester fibers have recorded the lowest rates. It was also found that there is a direct relationship between weight per m2 and sound absorption efficiency. Samples produced with 55% polyester/45% hollow polyester fibers and 600 g/m2 have achieved the best results. Keywords: Nonwoven Fabrics, Hollow Fibers, Cars Interior Acoustic Properties, sound Insulation
1.
Introduction frequently used in automotive interiors to reduce heat levels (Imfeld et al.) as customers expect more comfort, better safety, good appearance (both externally and internally), high performance and good fuel mileage (Mukhopadhyay, 2000). Textiles make a major contribution towards realizing customers’ expectations due to their advantages which made textiles a preferable material because of
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