Hard to answer without a lot more details, but the basic place to start is talk to your bank who you do business with now. And check out some small business cards from AMX, CapOne, Chase etc and see what might work best for your situation. Obviously I am being pretty US centric here as that is all I am familiar with when it comes to banking.
Also, while I wouldn't use it as my only research, Reddit has some subs which give pretty good details on what it takes to get a specific card from each bank, e.g. credit scores etc.
You'll almost certainly have a personal guarantee unless you get a secured card or the business is already fairly successful where it can stand on its own.