application

Poly(vinyl chloride) Poly(vinyl chloride)

PVC is polyvinyl chloride plastic, bright color, corrosion resistance, firm and durable, due to the addition of plasticizer, anti-aging agent and other toxic auxiliary materials in the manufacturing process, so its products generally do not store food and drugs.

PVC is polyvinyl chloride, which is a plastic product made of 43% oil and 57% salt. Compared with other kinds of plastic products, PVC uses raw materials more effectively and reduces fuel consumption. At the same time, the energy consumption of PVC manufacturing is very low. And in the late use of PVC products, can be recycled and converted into other new products or incineration to obtain energy.

PVC in the production will add stabilizer, but the stabilizer has non-toxic and toxic points, only add lead salt such as toxic stabilizer, will produce hidden dangers. But PVC products are mixed, some small enterprises use lead salt as stabilizer, it is difficult to meet the relevant health standards. When consumers choose PVC material, it is best to go to the regular building materials market with guaranteed reputation and quality, and ask the supplier to issue a test report. Consumers should pay attention to check the relevant documents and marks, obtain “related to drinking water health safety products health license” products are safe.

UPVC

Hard polyvinyl chloride (UPVC)

UPVC, also known as hard PVC, is an amorphous thermoplastic resin made of vinyl chloride monomer by polymerization reaction with certain additives (such as stabilizer, lubricant, filler, etc.).

In addition to using additives, the method of blending modification with other resins is also adopted, so that it has obvious practical value. These resins are CPVC, PE, ABS, EVA, MBS and so on.

The melt viscosity of UPVC is high and the fluidity is poor. Even if the injection pressure and melt temperature are increased, the fluidity will not change much. In addition, the forming temperature of the resin is very close to the thermal decomposition temperature, and the temperature range of the resin can be formed is very narrow, so it is a kind of difficult material to form.

UPVC pipe fittings, advantages of pipe

Lightweight: The proportion of UPVC material is only 1/10 of cast iron, easy to transport, install and reduce costs.

Superior chemical resistance: UPVC has excellent acid and base resistance, except for strong acid and base close to saturation point or strong Oxidising agents atmaximun.

Non-conductive: UPVC material can not conduct electricity, and is not corroded by electrolysis and current, so there is no need for secondary processing.

Can not burn, nor combustion-supporting, no fire concerns.

Easy installation, low cost: cutting and connecting are very simple, the use of PVC glue connection practice has proved to be the best safety, simple operation, low cost.

Durability: Excellent weatherability, and can not be corrupted by bacteria and fungi.

Low resistance, high flow rate: the inner wall is smooth, the fluid flow loss is small, the dirt is not easy to adhere to the smooth tube wall, the maintenance is simple, the maintenance cost is low.

Polypropylene polypropylene polypropylene polypropylene

PP is polypropylene plastic, non-toxic, tasteless, can be soaked in 100℃ boiling water without deformation, no damage, common acid, alkali organic solvents almost have no effect on it. Used mostly for eating utensils.

Polypropylene was polymerized by polypropylene monomer. The main component was polypropylene. According to the composition of the monomer participating in the polymerization, it can be divided into two kinds: homogeneous polymerization and copolymerization. Homopolymer polypropylene is polymerized from a single propylene monomer and has high crystallinity, mechanical strength and heat resistance. Copolymerized polypropylene is copolymerized by adding a small amount of ethylene monomer.

Its main features:

1. Appearance and physical characteristics: natural color, cylindrical particles are white and translucent, waxy; Non-toxic, tasteless, burning flame yellow blue, a small amount of black smoke, melting dripping, paraffin smell.

2. Main use and output: The polypropylene collected in the market is mainly used for woven products, widely used, can be used for woven bags, packaging rope, woven belt, rope, carpet backing and so on, its annual output of more than 800,000 tons, accounting for 17% of the total output of polypropylene.

PE Polyethylene polyethylene

PE is polyethylene plastic, stable chemical properties, usually make food bags and various containers, acid, alkali and salt water erosion resistant, but should not be wiped or soaked with strong alkaline detergent.

PPR

Random copolymer polypropylene

1. Regarding to Copolymer, a copolymer is called a Homonolymer. A copolymer who copolymers to two or more monomers is called a copolymer;

; 2. Regarding to Propylene and Ethene, PP-B and PP-R become a Poly poly Copolymer; among them,

1) Using the advanced gas copolymerization process, PE is randomly and uniformly polymerized in the molecular chain of PP, this raw material is called PP-R(random copolymerization polypropylene);

2) Using PP and PE block copolymerization, this raw material is called PP-B(block copolymerization polypropylene)

PEX

Crosslinked polyethylene (PEX)

Cross-linked polyethylene pipe (PEX) pipe introduction

Ordinary high density polyethylene (HDPE and MDPE) pipes, whose macromolecules are linear, have the biggest disadvantage of poor heat resistance and creep resistance, so ordinary high density polyethylene pipes are not suitable for conveying medium with a temperature greater than 45℃. “Cross-linking” is an important method for polyethylene modification. The linear macromolecular structure of polyethylene becomes PEX with three-dimensional network structure after cross-linking, which greatly improves the heat resistance and creep resistance of polyethylene. Meanwhile, its aging resistance, mechanical properties and transparency are significantly improved. At the same time inherits the inherent chemical corrosion resistance and flexibility of polyethylene pipe. There are three types of commercially available PEX tubes. PEXa pipe PEXb pipe PEXC pipe

PEX tube features

Excellent heat and cold resistance, high thermal strength at high temperature:

Excellent low temperature resistance toughness:

Heating without melting:

Extraordinary creep resistance: Creep data is an important basis for product design and engineering material selection. Compared with traditional materials such as metals, the strain behavior of plastics is significantly dependent on the loading time and temperature. The creep characteristic of PEX tube is almost one of the most ideal pipes among common plastic pipes. Extraordinary creep resistance: Creep data is an important basis for product design and engineering material selection. Compared with traditional materials such as metals, the strain behavior of plastics is significantly dependent on the loading time and temperature. The creep characteristic of PEX tube is almost one of the most ideal pipes among common plastic pipes.

Semi-permanent service life:

After the PEX tube has passed the test of 110℃ temperature, 2.5MPa ring stress and 8760h time, it can be deduced that its continuous service life of 50 years at 70℃.