PP T4401 is produced at Dushanzi Petrochemical Company’s 550,000-ton-per-year polypropylene plant in Xinjiang using the Innovene gas-phase horizontal stirred-bed process. Polymerization-grade propylene serves as the base monomer, ethylene as the comonomer, and hydrogen as the molecular weight regulator. The polymerization proceeds under a Ziegler-Natta catalyst system, followed by degassing, compounding, and pelletizing into natural-color pellets.<\/p>\n
The melt flow rate of 0.24 g\/10min (230\u00b0C \/ 2.16 kg, per GB\/T 3682.1-2018) sits within the tight 0.25 \u00b1 0.05 g\/10min specification window. Pipe extrusion calls for a low-flow resin that holds shape under the die rather than flowing freely \u2014 T4401’s MFR positions it precisely in the processing range where dimensional control is achievable on commercial pipe lines.<\/p>\n
Mechanical properties confirm the pipe-grade classification. Tested tensile modulus came in at 789 MPa against a specification floor of 650 MPa, and tensile strength at yield measured 23.8 MPa (specification \u226520 MPa). Charpy impact strength at 23\u00b0C reached 81 kJ\/m\u00b2 \u2014 more than double the \u226540 kJ\/m\u00b2 specification minimum \u2014 which provides margin against installation damage, pressure surges, and freeze-thaw cycles in field conditions. At -20\u00b0C, impact strength of 2.1 kJ\/m\u00b2 clears the cold-weather threshold of \u22651.5 kJ\/m\u00b2.<\/p>\n
Thermal performance is equally relevant for hot water service ratings. Oxidation induction time at 210\u00b0C measured 39 minutes (specification \u226530 min), indicating adequate antioxidant protection relative to pipe extrusion temperatures. Load deformation temperature under 0.45 MPa stress tested at 64\u00b0C (specification \u226560\u00b0C), and melting temperature at 147\u00b0C confirms the expected PP-R thermal profile.<\/p>\n
BASTONE supplies T4401 with the original Dushanzi Petrochemical inspection sheet showing batch-specific results \u2014 not a generic grade certificate \u2014 for every parameter in Q\/SY DS 136-2023. Batch traceability runs from the production lot number through to the export shipment, giving buyers a documentable chain of custody to production source data.<\/p>","protected":false},"excerpt":{"rendered":"
PP T4401 is a random copolymer polypropylene resin (PP-R) produced by PetroChina Dushanzi Petrochemical Company under the Kun Lun brand. Designed for hot and cold water pipe extrusion and injection-molded pipe fittings, the grade holds PPR 100 certification from China’s National Chemical Building Materials Testing Center and meets the hygienic requirements governing potable water distribution equipment.<\/p>\n
BASTONE distributes T4401 directly from PetroChina allocation, with every shipment accompanied by the original batch-specific Product Quality Inspection Sheet issued by Dushanzi Petrochemical’s quality laboratory.<\/p>","protected":false},"featured_media":706,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[47],"product_tag":[],"class_list":{"0":"post-881","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-pp","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"acf":[],"yoast_head":"\n