Tworzywa Sztuczne PZL Mielec Spółka z ograniczoną odpowiedzialnością Spółka jawna previously Zakład Przetwórstwa Tworzyw Sztucznych PZL-Mielec Sp. z o.o. (ZPTSz)  is specialized in production of composite parts and structures, plastic parts and bonding subassemblies  for aviation, railway industry and special products.

ZPTSZ has been established in 1994 on base of property, employees and several ten-year experience of Composite and Plastic Division of WSK  PZL Mielec.  ZPTSz has belonged to ZASADA HOLDING  since 1998 .

Since 1998, the company successfully implemented and certified quality management systems according to the requirements of ISO 9001 (1998), EASA PART 21 subpart G (2006), IRIS (2014), AS 9100 (2015) and obtained certificates of qualified supplier for all of its customers (inter alia  Polskie Zakłady Lotnicze  Sp. z oo, WSK "PZL-Swidnik" SA (group Finmeccanica-AgustaWestland), Hawker Beechcraft, Spirit Aerosystems, CAV Aerospace, Bombardier Transportation, Pesa Bydgoszcz SA.).

• many years experience in production of composite and plastic parts with technologies used  for aviation and special products.
• qualified staff,
• experience in quality management ,
• low labour and production costs,
• location In Special Economic Zone  „Euro - Park” Mielec",
• membership of “Aviation Valley”. 
• membership of  "Polish -German Chamber of Commerce and Industry"

The mission of Tworzywa Sztuczne PZL Mielec is to consolidate the image of a proven supplier of composite products for the aviation and railway industries as well as to care for customer satisfaction.

 Tworzywa Sztuczne PZL Mielec will carry out mission by:

• delivering products of consistent quality satisfying  the purchaser,
• constant development of the organization and providing it with strong economic basis,
• expansion of co-operation with present customers within the railway and aviation industries as well as winning new ones,
• offering co-operation with product competitiveness increase and create long-term business relations.