Interior trim part of an automotive vehicle comprising a velvet font layer

Abstract

An interior trim part made by a method that includes the steps of bringing a fiber web onto a conveyor, needlepunching the fiber web to form a base in contact with the conveyor, and introducing a binder component on the base. The binder component introduced on the base is a thermoplastic polymer in solid form. The method includes a step for heating the base to cause the thermoplastic polymer making up the binder component to penetrate the base over a thickness smaller than the thickness of the base.

1 . An interior trim part of a motor vehicle, comprising:
 a web of needlepunched fibers comprising base fibers forming a velvet font layer and a base,   a binder component arranged in the base;   wherein the fiber web comprises a quantity of strictly more than 0 wt % and of less than 15 wt % of binder fibers that are at least partially fusible,   the binder component arranged in the base being a melted solid thermoplastic polymer having penetrated the base over a thickness smaller than the thickness of the base.   
     
     
         2 . The part according to  claim 1 , wherein the binder fibers comprise bicomponent fibers comprising a core and an envelope surrounding the core, the melting point of the envelope being lower than that of the core, or fibers having a melting point lower than the melting point of the base fibers of the fiber web. 
     
     
         3 . The part according to any one of  claim 1 , wherein the maximum penetration thickness of the thermoplastic polymer making up the binder component in the base after at least partial melting is less than 30% of the thickness of the base. 
     
     
         4 . The part according to  claim 1 , wherein the melt flow index of the thermoplastic polymer making up the binder component is comprised between 50 g/10 mn and 70 g/10 mn. 
     
     
         5 . The part according to  claim 1 , wherein the base fibers are formed with a base of a thermoplastic polymer of the same nature as the thermoplastic polymer making up the binder component, the thermoplastic polymer of the base fibers in the base being at least partially melted, with no significant melting of the thermoplastic polymer of the base fibers on the font layer. 
     
     
         6 . The part according to  claim 1 , wherein the base fibers are formed with a base of a polymer, the thermoplastic polymer making up the binder component having a melting point lower than the melting point of the polymer of the base fibers.