Complete the crossword given below with the help of clues
Across
1. Substance used as synthetic wool (7 letters)
2. A plastic used for making containers and carry bags (9 letters)
3. Substance made up of a large number of smaller molecules (7 letters)
4. Another name for this compound is artificial silk (5 letters)
Down
5. A type of fibre obtained naturally from the cocoon (4 letters)
6. A synthetic fibre classified as a polyester (8 letters)
7. A polymer used for making rope (5 letters)