By Andria Cheng

NEW YORK (Dow Jones) -- American Apparel Inc., the teen retailer known for its provocative advertising, has agreed to sell about 18% of the company to private-equity firm Lion Capital as it faced deadline pressure for some loan obligations.

Los Angeles-based American Apparel (APP) has been under growing pressure, including facing a loan obligation Friday and possibly filing for Chapter 11 bankruptcy protection, after it took on $111.6 million in debt to help finance its rapid expansion over the five years.

American Apparel, headed by its controversial founder Dov Charney, reportedly owes SOF Investments $51 million and Bank of America $61 million. Charney has been forced to lend the company $6.5 million since December to keep products flowing into stores and to finance the opening of new stores, according to a report in Women's Wear Daily.

Shares of American Apparel rose 44 cents to $1.93 in morning trading.

With more than 260 stores in 19 countries, American Apparel has been able to attract shoppers with its line of U.S.-made T-shirts, jersey dresses and shiny leggings.

The company said it would use the proceeds from Lion Capital's $80 million investment to retire its second-lien credit line with SOF Investments.

Remaining proceeds will be use to pay American Apparel's revolving credit line, repay a portion of a shareholder note and other fees and expense. SOF is an affiliate of investment firm MSD Capital, which manages the capital of Dell Inc.'s (DELL) Chief Executive Michael Dell and his family.

London-based Lion Capital, whose previous investments have included luxury shoe label Jimmy Choo, received warrants that, if converted to common stock, would equal to an 18% ownership of American Apparel.