Fabric sheet with hig thermal stability

Abstract

A fabric sheet, with low-cost production, has high thermal and light stability, is recyclable, has a high mechanical load-bearing capacity, and is elastically compliant, wherein the fabric sheet has a main body composed of at least one ply, wherein the at least one ply contains first fibers comprising a first polymer and second fibers with a second polymer or wherein the at least one ply has one and the same fibers that contain a first and a second polymer, wherein a cold crystallization temperature of the first polymer lies at the softening temperature of the second polymer or below the softening temperature of the second polymer.

1 : A sheet product, comprising:
 a main body of at least one ply,   wherein the at least one ply comprises first fibers comprising a first polymer and second fibers comprising a second polymer   or   wherein the at least one ply comprises unitary fibers comprising first and second polymers,   wherein a cold crystallization temperature of the first polymer is equal to the softening temperature of the second polymer or below the softening temperature of the second polymer.   
     
     
         2 : The sheet product of  claim 1 , wherein the softening temperature and/or the melting temperature of the second polymer is above the softening temperature and/or the melting temperature of the first polymer. 
     
     
         3 : The sheet product of  claim 1 , wherein a difference between the softening temperatures of the first and second polymers as measured to DIN 53765 is at least 15° C. 
     
     
         4 : The sheet product of  claim 2 , wherein a difference between the melting temperatures of the first and second polymers is at least 5° C. 
     
     
         5 : The sheet product of  claim 1 , wherein at least one of the polymers is a polyester selected from the group consisting of polyethylene terephthalate, polypropylene terephthalate, polytetramethylene terephthalate, poly(decamethylene) terephthalate, poly-1,4-cyclohexylene dimethyl terephthalate, polybutylene terephthalate, polyethylene naphthalate, polyglycolic acid, polylactides, polycaprolactones, polyethylene adipates, polyhydroxyalkanoates, polyhydroxybutyrates, poly-3-hydroxybutyrate-co-3-hydroxyvalerates, polytrimethylene terephthalates, vectrans, polyethylene naphthalate, a copolymer of two or more of any of these, or a mixture of two or more of any of these. 
     
     
         6 : The sheet product of  claim 1 , wherein the first polymer has a cold crystallization temperature in a range of from 70 to 150° C. 
     
     
         7 : The sheet product of  claim 1 , wherein the second polymer has a softening temperature in a range from 70 to 150° C. 
     
     
         8 : The sheet product of  claim 1 , wherein at least one fiber comprises the first polymer and the second polymer, and
 wherein the first polymer is in the form of at least one segment embedded in a second polymer and/or at least partly bordered by the second polymer.   
     
     
         9 : The sheet product of  claim 8 , wherein segments of the first polymer are present in the sheet product in a circular, oval, or n-angular, trilobal, or multilobal cross section, and
 wherein segments of the first polymer are embedded in the second polymer and/or at least partly bordered by the second polymer.   
     
     
         10 : The sheet product of  claim 8 , wherein the fibers have a sheath-core geometry. 
     
     
         11 : The sheet product of  claim 1 , wherein a weight ratio of the first to the second polymer is in a range of from 50:50 to 95:5. 
     
     
         12 : The sheet product of  claim 1 , wherein the ply is a non-crimp fabric, a woven fabric, a knit fabric, a film, a foil, a batt or a nonwoven. 
     
     
         13 : The sheet product of  claim 1 , wherein the main body includes a composite material comprising the ply. 
     
     
         14 : The sheet product of  claim 1 , having a basis weight as measured to DIN EN 29073 1 in a range of from 50 to 4000 g/m 2 . 
     
     
         15 : The sheet product of  claim 1 , which is a thermoformed sheet product. 
     
     
         16 : A bicomponent fiber, comprising:
 a first polymer; and   a second polymer,   wherein a cold crystallization temperature of the first polymer is equal to the softening temperature of the second polymer or below the softening temperature of the second polymer.   
     
     
         17 : A method for manufacturing a component part of a transport apparatus, the method comprising:
 a sheet product as claimed in any preceding claim in the manufacture of a component part for a means of transport.   
     
     
         18 : The sheet product of  claim 1 , wherein a difference between the softening temperatures of the first and second polymers as measured to DIN 53765 is at least 20° C. 
     
     
         19 : The sheet product of  claim 1 , wherein a difference between the softening temperatures of the first and second polymers as measured to DIN 53765 is at least 25° C. 
     
     
         20 : The sheet product of  claim 2 , wherein a difference between the melting temperatures of the first and second polymers is at least 10° C.