Hello Gopal ,

Good Here are some of the colleges list for diploma in private university .

1. Annamalai Polytechnic college , Sivagangai .
2. Bapuji Polytechnic college , Shabanur .
3. Gomathi Ambal polytechnic college , Malaiyadikurichi .
4. BVVS SR Vastrad Rural Polytechnic , Guledgudd .
5. Shri Vaishnav Polytechnic college , Indore .

Here i am providing college list and you can compare colleges between them and you can able to download the college brochures also go through it to get some idea .

https://engineering.careers360.com/colleges/list-of-engineering-colleges-in-india?ownership=Private&degree=Diploma&branch=Textile%20Technology,Textile%20Production,Textile%20Engineering&sort=college_name_str&page=1

I think this answer will help you lot .

All the best !!!!