Updated: Question in GATE 2012 Textile Engineering and Fibre Science Paper with Solution

A question in GATE 2012 Textile Engineering and Fibre Science Paper with Solution has been updated:

In the context of thermal bonding of nonwoven web, the statement which is not true is

1. The polymer flows by surface tension and capillary action to fibre cross over points
2. A thermoplastic component has to be present in the web
3. Chemical reaction takes place
4. Heat is applied until the thermoplastic component melts