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HDPE Pipe Excellent Resistance To Performance

2018-11-15

Polyethylen hoher Dichte, der englische Name ist "Polyethylen hoher Dichte", bezeichnet als "HDPE". HDPE ist eine Art thermoplastisches Harz mit hoher Kristallinität und unpolar. Das Aussehen des ursprünglichen HDPE ist milchig weiß, ein gewisses Maß an Transluzenz im dürren Bereich. PE hat eine ausgezeichnete Beständigkeit gegen die meisten Eigenschaften von lebenden Chemikalien und Industriechemikalien. Bestimmte Arten von Chemikalien können chemische Korrosion hervorrufen, HDPE-Rohre, wie ätzende Oxidationsmittel (konzentrierte Salpetersäure), aromatische Kohlenwasserstoffe (Xylol) und halogenierte Kohlenwasserstoffe (Tetrachlorkohlenstoff). Das Polymer ist nicht hygroskopisch und weist eine gute Wasserdampffestigkeit auf und kann für Verpackungszwecke verwendet werden. HDPE hat gute elektrische Eigenschaften, insbesondere die hohe Durchschlagsfestigkeit von HDPE-Rohren, so dass es für Draht und Kabel geeignet ist. Mittlere bis hohe Molekulargewichte weisen eine ausgezeichnete Schlagfestigkeit bei Raumtemperatur sogar bei -40 ° C auf.

HDPE is a thermoplastic polyolefin produced by ethylene copolymerization. Although HDPE was introduced in 1956, the plastic has not reached its maturity level. This generic material is also constantly developing its new uses and markets. of thermoplastic resins. The appearance of the original HDPE is milky white, a certain degree of translucent in the meager section. PE has excellent resistance to most of the properties of living and industrial chemicals. Certain types of chemicals can produce chemical corrosion,HDPE Pipe such as corrosive oxidants (concentrated nitric acid), aromatic hydrocarbons (xylene) and halogenated hydrocarbons (carbon tetrachloride). The polymer is not hygroscopic and has good water vapor resistance.

PE kann mit einer Vielzahl von Verarbeitungsverfahren hergestellt werden. Hierzu gehören Folienextrusion, Folienextrusion, Rohr- oder Profilextrusion, Blasformen, Spritzgießen und Walzen.

HDPE pipe is the traditional steel pipe, PVC drinking water pipe replacement products.

HDPE pipe must withstand a certain pressure, usually to choose a large molecular weight, good mechanical properties of PE resin, such as HDPE resin. The tensile strength of LDPE resin is low, the pressure is poor, the rigidity is poor, the dimensional stability is poor when forming, and the connection is difficult, which is unsuitable as the material of water supply pressure pipe. However, because of its high health index, LDPE especially LLDPE resin has become a common material for the production of drinking water pipes. LDPE, LLDPE resin melt viscosity is small, good fluidity, easy to process, so the selection of its Melt Index range is also wider, usually mi in 0.3-3g/10min.

Chemische Eigenschaften

Polyethylene resistance to a variety of organic solvents,HDPE Pipe resistance to a variety of acid-base corrosion, but not antioxidant acid, such as nitric acid. Polyethylene is oxidized in an oxidizing environment.

Physisch

Polyethylene can be considered transparent in a thin film state, but in the presence of massive crystals there is a strong light scattering and opacity. The degree of polyethylene crystallization is affected by the number of branches, the more the branch chain, the more difficult the crystallization. The melting temperature of polyethylene is also affected by the number of branches,HDPE Pipe which is distributed from 90 degrees Celsius to 130 degrees Celsius, the more the branch chain melts the lower the temperature. Polyethylene single crystals can usually be prepared by dissolving high density polyethylene in an environment above 130 degrees Celsius.