Our site uses cookies necessary for its proper functioning. To improve your experience, other cookies may be used: you can choose to disable them. This can be changed at any time via the Cookies link at the bottom of the page.


A Novel Material for Plastic Pipe Applications [PE]

 

Plastic Pipes Conference Association # 2004 Milan

Forczek, Kerluke, Cheng, du Plessis, Seute

This paper describes the process and modification of a standard class PE100 high-density polyethylene pressure pipe grade polymer to a class PE200 grade polymer, for the manufacture of thermoplastic pipes for both liquid and gas conveying. This modified polymer was developed through the collaboration of Ion Beam Applications (IBA) and Gammatron, and has recently been introduced to the market under the trademark Raprex™. This paper details the technical developments that took place and the particularly promising results that have been achieved. The hydrostatic stress strength, expressed as hoop stress at ambient temperature and 100°C, of pipes made from the modified high-density polyethylene is particularly high – at least double that of the non-modified polymer. This implies that pipes may be manufactured from the modified polymer with reduced wall thicknesses, which will continue to meet hydrostatic stress strength requirements while achieving a cost and weight savings advantage. The uniqueness of this new material lies in the prior modification of the feedstock highdensity polyethylene polymer by the partial radiation cross-linking of the feedstock material. The advantage is that the pre-cross-linked material can be processed on existing extrusion equipment with little modification required. Apart from the remarkable increase in the hydrostatic stress strength of this new material, increases in other mechanical properties, as well as resistance to chemicals, have been achieved making this material a candidate for a variety of different pressure and non-pressure pipe applications. Furthermore, the polymer and additives used are all suitable for use in contact with water intended for human consumption and are fully recyclable with the associated positive environmental implications.

Please note that the whole article content is available on PPCA website only :

Related papers

2021 Amsterdam : FINITE ELEMENT METHOD (FEM) USED TO SIMULATE THE STRESS/STRAIN OF THE POINT LOAD TEST (PLT) IN A BROADER STUDY TO SUPPORT THE FUTURE ISO TEST STANDARD

Author(s) : S. Nestelberger, J. Cheng

The Point Load Test (PLT) [‎ 1, ‎ 2] was designed to simulate the SCG (slow crack growth) failure initiated by a rock pressing into the exterior wall of a polymer pipe. Today’s PE materials sustain long PLT testing times, due to its high SCG resistance design. Consequently, an accelerated “PLT+” with the support...

2018 Las-Vegas : Preparation and studying of thermoplastic cross-linked polyethylene

Author(s) : Cheng Zhi, Mingyuan Hu, Kaige Duan, Chaoxi Zhou, Dongming Yu

The PE properties are obviously improved by crosslinking modified to TPEX, which can approach to that of PEX, while still remaining thermoplastic. It can be processed by the common forming method of thermoplastic; the products can be hot-melted and the scrap can be processed to be reused. The two-layer structure...

2018 Las-Vegas : Preparation and studying of two-layer oxygen barrier plastic pipe

Author(s) : Mingyuan Hu, Dongming Yu, Zhangcheng Chen, Cheng Zhi, Kaige Duan

Studying in barrier property of TLCP/PO alloy and EVOH/PO alloy. Filtrating formulas with extruding alloy into pipes. Trying to coat alloy on pipes and co-extrude into two-layer oxygen barrier plastic pipe. The traditional Ethylene vinyl alcohol copolymer (EVOH) barrier plastic pipe used in internal closed-loop...

2016 Berlin : The influence of beta-crystal content in PP-RCT materials and calculations of the test pressure of pipe

Author(s) : Tu Xiang-qun, Wang Chao, Cheng Zhong-lin, Dong Bo-bo

This paper is to verify the impact of different contents of nucleating agent and annealing processes on the content of β-crystal. By using four-parameter equation of PP-RCT with requirements in different application conditions, different temperature coefficients and Miner's rules the design stress of PP-RCT materials...

2014 Chicago : Renovation of Old Water Pipeline and Case Study in China

Author(s) : Xiao Lei, Cheng Liang, Fang Dongyu

The renovation of old water pipes in a big city, such as Shanghai in China, is always a challenging job due to huge population, heavy traffic and high demand for drinking water. Due to these problems No-Dig technology has become common practice, particularly relining using plastic pipes, to repair corroded metallic...

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellORLEN UnipetrolPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE