PE 파이프와 HDPE 파이프의 차이점은 무엇입니까?

The difference between HDPE 파이프 and PE pipes is a question that is often asked. It seems simple, but few people explain it clearly. Here we will systematically introduce it to you.

PE pipes are Polyethylene plastic pipes. 플라스틱의 가장 기본적인 형태로, PE has excellent resistance to most household and industrial chemicals. Common plastic bags, cling film, 등. are all made of PE.

PE pipes as a whole can be classified into three types: 저밀도 폴리에틸렌 파이프 (LDPE 파이프), 중밀도 폴리에틸렌 파이프 (MDPE 파이프), 및 고밀도 폴리에틸렌 파이프 (HDPE 파이프).

1. Low density polyethylene (abbreviated as LDPE)

Low-density polyethylene is generally produced by high-pressure polymerization with a density of 0.9910 -0.925g/cm ³. The molecular structure of low-density polyethylene is a linear macromolecule with many side chains. The side chains of different lengths on the main chain affect the regularity of the macromolecule arrangement, and the stacking is not tight, which hinders the crystallization of polyethylene. 그러므로, the crystallinity is 55% -65%. Low-density polyethylene has a low melting point and a soft texture. 긴 측쇄는 가공 중 높은 전단 속도에서 낮은 점도를 제공하고 연신 중 높은 용융 강도를 제공합니다., making it very suitable for the blown film process and mainly used in the production of agricultural films, heavy packaging films, 등.

2. Medium-density polyethylene (줄여서 MDPE)

Medium-density polyethylene (MDPE) is controlled in density by A-olefin copolymerization at medium and low pressures using an efficient catalyst

(0.926-0.940q/cm3), 결정성을 지닌 70%-80%. 곁사슬이 많고 길기 때문에, density and crystallinity decrease, medium-density polyethylene has better flexibility and low-temperature properties, and its tensile strength, 경도, thermal properties, 등. are inferior to those of high-density polyethylene. Due to the fact that copolyolefin can increase the intergranular linking chains of the crystal sheets of medium-density polyethylene, its resistance to slow cracking and long-term retention of mechanical strength are greatly improved compared to LDPE. Medium-density polyethylene can be used in the production of pressure pipes, 배달 파이프, various containers and packaging films.

3. High-density Polyethylene (줄여서 HDPE)

고밀도 폴리에틸렌 (HDPE) is produced by a low-pressure polymerization process, is linear, has a density of 0.94-0.965q/cm ³, has a crystallinity of 80%-95%, and is a white powder or granule. Compared with low-density polyethylene, it has fewer other sub-chains, a nearly linear structure, regular and close-packed molecules, and thus has high crystallinity, high density, relative molecular mass ranging from hundreds of thousands to hundreds of thousands, 용융 유속의 좁은 범위. High density polyethylene has high rigidity and toughness, good mechanical strength and heat resistance, as well as good resistance to deep agents and steam penetration. High-density polyethylene has the lowest permeability among all types of polyethylene, the strongest corrosion resistance, and good rigidity, and is mainly used in the production of various pressure pipes, injection molded products, 등.

HDPE pipe is a type of PE pipe, but the performance of HDPE pipe is superior to that of ordinary PE pipe, which we can summarize as follows:

1, Different pressure resistance:

HDPE pipes must be able to withstand certain pressures, and usually a high molecular weight and good mechanical properties PE resin is chosen, such as HDPE resin, which is nine times stronger than ordinary polyethylene pipes (PE관);

2, the wear resistance is different

모든 엔지니어링 플라스틱 중에서, HDPE has the best abrasion resistance. 분자량이 높을수록, the more wear-resistant the material is, even more than many metal materials (탄소강과 같은, 스테인레스 스틸, 청동, 등.) the abrasion resistance of common PE is only one-tenth of that of HDPE;

3, Different uses

일반 PE관 (중밀도 폴리에틸렌 파이프) 기체 인공 가스 운송에 적합합니다., 천연가스, 액화석유가스, while low-density polyethylene pipes are flexible tubes;

HDPE 파이프 (고밀도 폴리에틸렌 파이프) 주로 천연가스 수송에 사용됩니다., municipal engineering water supply systems, indoor water supply systems of buildings, outdoor buried water supply systems and buried water supply systems in residential areas and factories, old pipeline repair, water treatment engineering pipeline systems, 및 정원의 공업용 수도관, irrigation and other fields.

HDPE pipes can be used as a replacement for traditional steel pipes and polyvinyl chloride drinking water pipes, which ordinary PE pipes cannot.

공급자

낙양대당에너지기술주식회사, 주식회사. 고품질 플라스틱 파이프 및 부속품을 전문으로 하는 선도적인 중국 제조업체입니다.. 최첨단 자동화 생산 라인을 갖추고 있으며 팀의 지원을 받습니다. 200 전문가, 우리는 이상으로 구성된 광범위한 제품 라인을 제공합니다. 150 types of plastic pipes and fittings designed for water supply and drainage systems, 가스 전달, 바닥 난방 시스템. 당사의 주요 제품에는 PVC 파이프 및 피팅이 포함됩니다., 체육 (HDPE) 파이프 및 피팅, PPR 파이프 및 피팅, 및 PEX 바닥 난방 파이프.

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