The preferred crosslinking acrylic copolymer for {HEAD ~ use} as a binder in the present invention is an aqueous carboxyl modified acrylic copolymer known as {TAIL ~ Hycar}™ 26315 available from the BF Goodrich Company of Brecksville, Ohio, and having a glass transition temperature of about 55 degrees C. This same companys Carbocure™ TSR 72, having a glass transition temperature of 72 degrees C. works almost as well, but the mat made using this binder may be too stiff for some applications 
The preferred crosslinking acrylic copolymer for { HEAD ~ use } as a binder in the present invention is an aqueous carboxyl modified acrylic copolymer known as { TAIL ~ Hycar } ™ 26315 available from the BF Goodrich Company of Brecksville , Ohio , and having a glass transition temperature of about 55 degrees C. This same companys Carbocure ™ TSR 72 , having a glass transition temperature of 72 degrees C. works almost as well , but the mat made using this binder may be too stiff for some applications
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