Chemical bonding nonwoven interlining is very polular interlining, widely used in garments manufacturing. 

The regular specification is: 100% polyester or 50% polyester and 50% viscose 
 mixed fabri at 18gsm, 20gsm, 25gsm , 30gsm, 35gsm with paste dot, double-dot
 or scattering coating, 40gsm above most be coated by scattering PE.

Regular item is: 1000, 1000F, 0020F, 2016F, 1025F, 1035F, 1045F, 1050F etc.