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Virgin grade PVC Resin SG5 for Pipe China Manufacturer

May 21,2023

China Manufacturer of Virgin Grade PVC resin sg5 for Pipe


Pvc resin SG5 virgin grade is used in the manufacture of pipes, fittings, panels, calendaring, injection and moulding profiles, and so on. This raw material is also used to make plastics such as hoses, cables, and wires.


Polymerizing droplets of Vinyl Chloride monomer suspended in water yields suspension PVC resins. They are the most common resins.

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Chemical Composition

PVC is a versatile polymer that has excellent chemical stability, corrosion resistance, water resistance, and thermoplasticity. It is soluble in acetone, hydrochloric ether, ester, and a few alcohols.


Inorganic pigments such as titanium dioxide and iron oxide can also be used to color it, as can the addition of alcohols. It can be used to make building materials, electrical wire insulation, imitation leather, signs, and inflatable items, among other things.


PVC resins are classified into various varieties, each with its own set of characteristics. They are primarily distinguished by their K-value, which indicates their molecular weight and degree of polymerisation.


High K value resins are typically the greatest for mechanical qualities, but require more plasticizer to get comparable softness. They are appropriate for cable insulation, strong coatings, and other high-stress applications.


Phthalate esters (Di Octyl Pthalate or DOP) and trimellitates are the most often used primary plasticisers. Acrylic polymers and MBS copolymers, which function like rubber and improve stress resistance in rigid PVC goods, are two more major families of plasticisers.


Mineral fillers can be used in place of plasticisers in some circumstances. These are referred to as Activated PCC or GCC.


Although calcium carbonate is the most commonly used filler, it is also the most expensive. To improve quality, it is ground into a fine powder and blended with other fillers. Mineral fillers include sodium sulphate, stearic acid, and calcium stearate.


There are also numerous Secondary Plasticisers that soften the rigid PVC resin. Liquids that can be absorbed in Suspension resin using heated mixers. However, there are restrictions because they can only be added at a set rate. They are usually employed in dry mixes to produce the highest levels of plasticizer.

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Physical Properties

PVC resin (polyvinyl chloride) is a common raw ingredient in the fabrication of plastics. It is chemically stable, corrosion resistant, and water resistant. It is soluble in acetone, hydrochloric ether, ester, and a few alcohols. It has high solubility, electrical insulation, thermoplasticity, and membrane forming ability.


There are various grades of PVC Resins available on the market. These are classed based on their K-value, which is a measure of molecular weight and polymerization degree. They are available in a variety of particle sizes ranging from 50 to 250 microns.


The most common type of resin is suspension grade resin, which is polymerized by suspending droplets of Vinyl Chloride monomer in water, centrifuged, and dried. The resulting slurry is refined further to produce the final resin in white powder form, which can be reacted with blending agents and catalysts to produce a variety of rigid and non-rigid PVC products.


The other variety is paste grade, which is the most expensive but is mostly used for Plastisols and is made by spray drying a PVC emulsion in water. This requires far more energy than suspension resins and brings all of the emulsifying chemicals and catalysts with it.


Plasticisers are frequently made from high-molecular waxes, high-molecular esters, and complex lubricants. They keep heated PVC from clinging to metal surfaces during processing and also act as a stabilizer, keeping the plastisol stable for lengthy periods of time.


They are necessary in the manufacture of a variety of PVC compounds, and their right selection is critical in the development of physical qualities. A range of whitening pigments are also available in addition to these. Some are organic, while others are inorganic.

Thermal Properties

PVC resin is the most often used raw ingredient in the production of plastics. It is chemically stable, corrosion resistant, and water resistant. Acetone, hydrochloric ether, ester, and certain alcohols dissolve it. It also has the ability to give solubility, electrical insulation, thermoplasticity, and membrane forming capacity.


PVC resins are classified into grades based on their K-Value. The molecular weight of the vinyl chloride monomer and the degree of polymerization of the resultant resin dictate these. These levels vary from low (K58-60) to medium (K65-68).


The higher the K-Value, the better the mechanical qualities, however this can make processing difficult. These resins are used to make high-end cable insulation in suspension and paste grade resins, as well as tough coatings for conveyor belts.


These are typically generated through suspension or bulk polymerisation, in which droplets of Vinyl Chloride monomer are suspended in water and polymerized by an appropriate catalyst. The resultant resin can have particle sizes ranging from 50 microns to 250 microns. These are more porous and can absorb more plasticizers than less porous kinds.


Plasticisers can be added to these resins to make them softer and more flexible. The most frequent are primary plasticisers, which can be absorbed in considerable quantities by the resin. PTFE, TEFLON, and PVCamide are examples of other plasticizers.


Plasticizers soften and stretch the rigid PVC resin. The amount of Plasticiser used depends on the application and the desired softness.


Calcium Carbonate (CCC) can be used to reduce DOP absorption while also improving processing and gloss. This is a common cost-cutting agent, but it must be used with caution when optimizing the addition level and grade selection. Other mineral fillers available include talc, dolomite, and wolastonite. These can be utilized to minimize DOP absorption in PVC resins as well.

Mechanical Properties

PVC Resin SG5 is widely used in the production of pipes, fittings, panels, calendaring, injection, moulding profiles, sandals, and transparent items, among other things. It has good mechanical qualities, with tensile strength of about 60MPa and impact strength of 5-10kJ/m2. It also has excellent dielectric properties. It is soluble in acetones, hydrochloric ether, ester, and a little amount of alcohol. It has high solubility, electrical insulation, thermoplasticity, and membrane forming capability.


It is an amorphous white powder with a low branching degree, a molecular weight in the range of 50,000 110,000, a high polydispersity, a non-fixed melting point, a softening temperature of 80 85 AC/?, a viscoelastic state of 130 AC/?, and a flow state of 160 AC/?


This material is extremely chemically stable, corrosion resistant, and water resistant. It has significant anti-corrosion and anti-water properties and can be dissolved in acetones, hydrochloric ether, ester, and certain fatty chlorohydrocarbons.


Light and heat have low stability. When exposed to sunlight for an extended period of time, the molecule decomposes and produces hydrogen chloride. Further catalytic degradation of HCl will result in discolouration as well as a decrease in physical and mechanical characteristics. Stabilizers must be added to the materials in actual applications to improve their stability.


There are numerous Plasticisers in PVC, and various mixtures of these Plasticisers can be created. The selection of these plasticisers is critical because it affects the product's flexibility and rigidity. Some are resistant to flames, while others are not. They can also have an impact on the final product's color. The amount of plasticiser in the blend must be carefully controlled. The additives are frequently recorded as a part per hundred concentration. Lubricants are also an important part of the PVC manufacturing process. They keep hot melt from clinging to the extruder's metal surfaces, avoiding gelation and lowering production speeds.

Applications

PVC is an adaptable polymer with excellent chemical stability, corrosion resistance, water resistance, and thermoplasticity. It dissolves in a variety of solvents, including acetone, hydrochloric ether, ester, and certain alcohols. It's utilized to make a variety of soft items like films, hoses, leathers, and wire cables.


It can also be used to make sanitary fittings, moulding profiles, pipes, plastic windows and doors, packing film, plastic carpet, and plastic ceilings, among other things. It is also commonly utilized in the production of bottles, cigarette boxes, and paper tubes.


PVC Resins are classified into two types: suspension grade and paste grade. These are created by polymerizing droplets of Vinyl Chloride monomer in water using a specific Catalyst. Special heating systems are used to centrifuge and dry the resultant slurry.


* K65-68 resins have a medium K value and provide a good blend of mechanical characteristics and processibility. These are the most common, however a variety of lower K Value grades are also available.


Higher K Value resins are frequently more difficult to produce yet have excellent mechanical qualities. These are useful in applications requiring strong coatings, such as conveyor belts and industrial flooring. Because of their increased melt viscosity, they can be employed as Impact Modifiers in calendered and extruded sheets, as well as thick wall pipes.


Precipitated Calcium Carbonate (PCC) coated with Stearic Acid and/or Calcium Stearate can be used to make these. Talc, Dolomite, and Wolastonite are among other mineral fillers.


Depending on the required Physical qualities, they can be introduced in little or big dosages. In large concentrations, they can gel into the hard resin, resulting in very soft products.