1.

What do the "teething problems" mentioned involve?

Those problems involve the new equipment which is nothing serious.

2.

Why is the raw materials their main concern?

Because their regular supplier is having to clear a backlog of orders.

3.

What about price or availability of the raw materials?

It doesn't seem a problem for them.

4.

Will this situation affect the projected launch in September?

No, it won't. At most they will have to hold off for a maximum of two weeks.