Polypropylene Plastic Strapping - Standard Machine Grade Item Code: Type: Sold By Quantity Strapping Polypropylene Plastic Machine Grade - For Fully Automatic Description Standard Machine Grade Polypropylene strapping is the most commonly used and least expensive of all strapping materials. It is light and easy to apply and recycle and is manufactured under closer tolerances and has minimal camber. Applications are bundling, carton closing, carton reinforcement and unitizing. Machine grade strapping is used with operator assisted full arch machines to fully automatic in-line systems. Machine grade strapping is closed using heat seal or friction weld. Stock color available: White. Special order colors available: Clear, Yellow, Black.