The standard length of transparent PVC tubes is 4 meters. Transparent PVC tubes are high polymer materials that use a chlorine atom to replace one hydrogen atom in polyethylene. PVC is a white powder with an amorphous structure and a low branching degree. The molecular weight of industrial PVC is generally in the range of 50,000 to 120,000, and it has a large degree of polydispersity. The molecular weight increases as the polymerization temperature decreases. It has no fixed melting point and starts to soften at 80-85°C, become viscoelastic at 130°C, and transform into a viscous flow state at 160-180°C. Its tensile strength is about 60 MPa, and its impact strength is 5-10 kJ/m2; it has excellent dielectric properties. It has poor stability to light and heat and will decompose and produce hydrogen chloride and change color when exposed to sunlight or temperatures above 100°C for a long time. Therefore, stabilizers must be added to improve the stability to heat and light in practical applications.
PVC is very hard and can only be dissolved in a few solvents such as cyclohexanone, dichloroethane, and tetrahydrofuran. It is stable to organic and inorganic acids, alkalis, and salts. Its chemical stability decreases with increasing temperature. It is a slightly yellow translucent substance with a natural shine. Its transparency is better than that of polyethylene and polypropylene, but worse than that of polystyrene. Depending on the amount of auxiliary agent used, it can be divided into soft and hard PVC. Soft PVC is flexible and sticky, while hard PVC is harder than low-density polyethylene but softer than polypropylene. It turns white at the refraction point.
Transparent tube pvc is a kind of flexible, flame-retardant, non-shrinking sheath. They have good electrical and physical properties, acid resistance, corrosion resistance, and excellent flame retardancy. They are widely used in electronic components, home appliances, automobiles, machinery, toys, motors, transformers, and other product fields.
PVC material is a type of plastic decorative material that is a shorthand for polyvinyl chloride material. It is mainly made of polyvinyl chloride resin and added with appropriate amounts of anti-aging agents, modifiers, etc. It is processed through mixing, calendering, vacuum forming, and other processes. PVC is an amorphous polymer and contains microcrystals with 5%~10% crystallinity (melting point 175°C). The physical properties of PVC, such as molecular weight, crystallinity, and softening point, vary with the conditions of the polymerization reaction (temperature).
Transparent PVC tubes are made of PVC resin as the base material, mixed with stabilizers, plasticizers, fillers, colorants, modifiers, etc., and processed into PVC resin plastics through plasticization and molding. PVC materials have the characteristics of lightweight, thermal insulation, moisture-proof, flame retardancy, and easy construction. They come in various specifications, colors, and patterns and are highly decorative, making them widely used in production and daily life. For example, PVC water tubes, PVC plastic doors and windows, plastic toys containing PVC, and wires and cables. However, because it is harmful to the human body, many countries such as Europe and Japan have restricted products made of PVC. The outstanding advantages of general PVC resin plastic products are non-flammability, wear resistance, chemical corrosion resistance, and low gas and water vapor permeability.
In addition, transparent PVC tubes also have comprehensive mechanical properties, transparency, electrical insulation, thermal insulation, sound absorption, and shock absorption, making them the most cost-effective general-purpose materials. Generally, PVC contains dioctyl phthalate plasticizers that are not allowed to be used in accordance with national standards. DEHA is easily released at high temperatures and can be harmful to the body after contact. Since PVC is a hard plastic, a large amount of plasticizer must be added to make it soft, and plasticizers are easily released in a heating environment.