The Differences Between PE Pipes and HDPE Pipes

ທໍ່ PEpolyethylene-pipe are made of polyethylene plastic. ເປັນປະເພດພື້ນຖານທີ່ສຸດຂອງພາດສະຕິກ, Polyethylene has excellent resistance to most household and industrial chemicals. Common items like plastic bags and cling film are made of PE.

Polyethylene pipes can be generally classified into three types: ທໍ່ polyethylene ຄວາມຫນາແຫນ້ນຕ່ໍາ (ທໍ່ LDPE), ທໍ່ polyethylene ຄວາມຫນາແຫນ້ນຂະຫນາດກາງ (ທໍ່ MDPE), ແລະທໍ່ polyethylene ຄວາມຫນາແຫນ້ນສູງ (ທໍ່ HDPE).

I. Low-Density Polyethylene (LDPE for short)

Low-density polyethylene is usually produced by high-pressure polymerization, with a density of 0.910-0.925g/cm³. The molecular structure of LDPE is a linear macromolecule with many side chains. The varying lengths of these side chains on the main chain affect the regularity of macromolecular arrangement, making the packing loose and hindering the crystallization of polyethylene. ເພາະສະນັ້ນ, its crystallinity is only 55% – 65%. LDPE has a low melting point and is soft. ລະບົບຕ່ອງໂສ້ຂ້າງຍາວໃຫ້ຄວາມຫນືດຕ່ໍາໃນອັດຕາ shear ສູງໃນລະຫວ່າງການປຸງແຕ່ງແລະຄວາມເຂັ້ມແຂງ melting ສູງໃນລະຫວ່າງການ stretching., making it very suitable for blow molding processes. It is mainly used in the production of agricultural films and heavy packaging films.

II. Medium-Density Polyethylene (MDPE ສໍາລັບສັ້ນ)

Medium-density polyethylene is produced using efficient catalysts under medium and low pressure through copolymerization with α-olefins to control its density (0.926-0.940g/cm³), ມີ crystallinity ຂອງ 70%-80%. ເນື່ອງຈາກລະບົບຕ່ອງໂສ້ດ້ານຂ້າງຈໍານວນຫລາຍແລະຍາວ, the density and crystallinity decrease, giving MDPE better flexibility and low-temperature properties. ແນວໃດກໍ່ຕາມ, its tensile strength, ຄວາມແຂງ, and heat resistance are inferior to those of high-density polyethylene. The copolymerization of olefins increases the interlamellar connection chains in the MDPE crystal, significantly improving its resistance to slow crack growth and long-term mechanical strength retention compared to LDPE. MDPE can be used in the production of pressure pipes, ທໍ່ສົ່ງ, various containers, and packaging films.

III. Polyethylene ຄວາມຫນາແຫນ້ນສູງ (HDPE ສໍາລັບສັ້ນ)

polyethylene ຄວາມຫນາແຫນ້ນສູງ (HDPE) is produced by low-pressure polymerization, presenting a linear structure with a density of 0.94-0.965g/cm³ and a crystallinity of 80%-95%, appearing as white powder or granules.

Compared to low-density polyethylene, HDPE has fewer side chains and is nearly linear in structure, with regular molecular arrangement and tight packing. ເພາະສະນັ້ນ, it has a high crystallinity and density, with a relative molecular weight of hundreds of thousands to millions, ແລະລະດັບຄວາມແຄບຂອງອັດຕາການໄຫຼລະລາຍ. HDPE has high rigidity and toughness, excellent mechanical strength and heat resistance, as well as good resistance to deep agents and steam permeability. Among all types of polyethylene, HDPE has the lowest permeability and the strongest corrosion resistance, and also has good stiffness. It is mainly used in the production of various pressure pipes and injection-molded products.

ເພາະສະນັ້ນ, HDPE pipes are a type of PE pipe, but compared to ordinary PE pipes, HDPE pipes have superior performance, which can be summarized as follows:

1. Different pressure-bearing capacity: HDPE pipes must withstand certain pressure, and usually require PE resins with high molecular weight and good mechanical properties, such as HDPE resins, which have a strength nine times that of ordinary polyethylene pipes (ທໍ່ PE).
2. Different wear resistance: ໃນບັນດາພາດສະຕິກວິສະວະກໍາທັງຫມົດ, HDPE has the best wear resistance. ນ້ໍາຫນັກໂມເລກຸນສູງຂຶ້ນ, the more wear-resistant the material becomes, even surpassing many metal materials (ເຊັ່ນ: ເຫຼັກກາກບອນ, ສະແຕນເລດ, ທອງແດງ, ແລະອື່ນໆ). The wear resistance of ordinary PE is only one-tenth that of HDPE.
3. Different applications: ທໍ່ PE ທົ່ວໄປ (ທໍ່ polyethylene ຄວາມຫນາແຫນ້ນຂະຫນາດກາງ) ແມ່ນເຫມາະສົມສໍາລັບການຂົນສົ່ງອາຍແກັສປອມ, ອາຍແກັສທໍາມະຊາດ, and liquefied petroleum gas, while low-density polyethylene pipes are used as soft pipes. ທໍ່ HDPE (ທໍ່ polyethylene ຄວາມຫນາແຫນ້ນສູງ) ສ່ວນໃຫຍ່ແມ່ນໃຊ້ສໍາລັບການຂົນສົ່ງອາຍແກັສທໍາມະຊາດ, municipal water supply systems, indoor water supply systems in buildings, outdoor buried water supply systems, and buried water supply systems in residential areas and factories, as well as for the repair of old pipelines, water treatment pipeline systems, ແລະທໍ່ນ້ໍາອຸດສາຫະກໍາໃນສວນ, ຊົນລະປະທານ, and other fields. HDPE pipes can be used as the successor to traditional steel pipes and polyvinyl chloride drinking water pipes, but ordinary PE pipes cannot.

ຜູ້ສະຫນອງ

Luoyang Datang Energy Tech Co.Ltd ເປັນຜູ້ຜະລິດຊັ້ນນໍາຂອງຈີນທີ່ມີຄວາມຊ່ຽວຊານໃນທໍ່ຢາງແລະອຸປະກອນເສີມທີ່ມີຄຸນນະພາບສູງ. ອຸ​ປະ​ກອນ​ທີ່​ທັນ​ສະ​ໄຫມ​ຂອງ​ສາຍ​ການ​ຜະ​ລິດ​ອັດ​ຕະ​ໂນ​ມັດ​ແລະ​ສະ​ຫນັບ​ສະ​ຫນູນ​ໂດຍ​ທີມ​ງານ​ຂອງ​ 200 ຜູ້ຊ່ຽວຊານ, ພວກເຮົາສະເຫນີສາຍຜະລິດຕະພັນຢ່າງກວ້າງຂວາງປະກອບດ້ວຍຫຼາຍກວ່າ 150 ປະເພດຂອງທໍ່ພາດສະຕິກແລະ fittings ອອກແບບສໍາລັບການສະຫນອງນ້ໍາແລະລະບົບລະບາຍນ້ໍາ, ການສົ່ງອາຍແກັສ, ແລະລະບົບຄວາມຮ້ອນຊັ້ນ. ຜະລິດຕະພັນຕົ້ນຕໍຂອງພວກເຮົາປະກອບມີທໍ່ PVC ແລະ Fittings, PE (HDPE) ທໍ່ ແລະ Fittings, ທໍ່ PPR ແລະ Fittings, ແລະທໍ່ຄວາມຮ້ອນຊັ້ນ PEX.