WEIFANG AURUM Chemical Co., Ltd

Chlorinated polyethylene (CPE), as a traditional and widely used toughening agent for PVC, holds an important position in the field of PVC processing due to its unique performance characteristics. 1. Structural characteristics of CPE CPE is a polymer material obtained by the chlorination reaction of high - density polyethylene (HDPE). The chlorine content is a key factor affecting the properties of CPE, and generally, the chlorine content is between 30% - 40%. 2. Toughening mechanism for PVC CPE has rubber - like elasticity. When added to PVC, it forms a dispersed phase in the PVC matrix. When subjected to external impact, the rubber - phase region of CPE can undergo elastic deformation and absorb a large amount of energy. At the same time, the rubber - phase particles can act as stress - concentration points, triggering the formation of crazes and shear bands in the surrounding PVC matrix. The development and interaction of crazes and shear bands consume energy, preventing the rapid propagation of cracks and thus improving the toughness of PVC. Compatibility and interfacial action: CPE has a certain degree of compatibility with PVC, enabling the formation of a good interfacial bond between the two. This interfacial bonding force helps to effectively transfer stress between the CPE rubber phase and the PVC matrix, giving full play to the toughening effect. Appropriate interfacial action not only ensures the uniform dispersion of CPE in PVC but also enables the two to jointly resist external forces and improve the overall performance of the material. 3. Application scenarios in PVC products Door and window profiles: This is one of the most widely used fields for CPE - toughened PVC. The toughening effect of CPE makes the profiles less likely to break when subjected to external impact, improving the safety and durability of doors and windows. It also maintains the stability of color and performance, and is less prone to problems such as aging and fading. Pipe fittings: In the production of PVC pipe fittings, CPE is often used to produce drainage pipes, wire and cable sheaths, etc. For drainage pipes, the pipes need to have a certain degree of toughness to adapt to different installation environments and resist possible external impacts. In wire and cable sheaths, CPE not only provides a toughening effect but also enhances the flame - retardant properties of the pipes, ensuring the safe use of wire and cable. Stone - plastic boards: Stone - plastic boards are commonly used in fields such as building decoration and advertising production. They have high requirements for hardness and rigidity, but at the same time, they also need to have a certain degree of toughness to prevent brittle fracture. After adding an appropriate amount of CPE toughening agent, the impact strength of stone - plastic boards is significantly improved. #weifangaurum #CPE135A #PVC #PVCPIPE #PVCFITTINGS #

What problems cause the uneven wall thickness of PVC pipes? 01. Problems with molds One of the key factors for the uneven wall thickness of PVC pipes lies in the molds. The clearance of the molds or the shape of the mold channels can both lead to uneven flow of PVC raw materials during the forming process, which in turn results in inconsistent wall thickness of the pipes. Especially in terms of mold design standards or manufacturing precision, it may cause the flow of raw materials to be blocked during the pipe forming process, resulting in changes in wall thickness at different positions. Concrete manifestations: Uneven mold clearance: The asymmetrical clearance on the upper and lower or left and right sides of the mold may lead to a relatively faster flow rate of raw materials in these areas, thus making the wall thickness of the pipes in these parts thinner. Mold design defects: Unreasonable design of the mold channels will affect the flow of molten PVC, resulting in thicker or thinner wall thickness in some areas. Another situation is the blockage of the mold channels. Any tiny blockage will lead to poor flow of the molten PVC, which will then affect the uniformity of the wall thickness of the pipes. Finally, mold cleaning is an important step to ensure the normal operation of the mold. Any inadequate cleaning may result in the uneven wall thickness of PVC pipes. 02. Uneven Plasticization and Insufficient Pressure During the production process, uneven plasticization or insufficient pressure can also lead to uneven wall thickness. Uneven plasticization means that the PVC raw materials fail to melt evenly during the heating process, and the fluidity of some raw materials is poor, which further affects the wall thickness of the pipes. Insufficient pressure means that the molten PVC materials in the mold cannot be fully squeezed into every corner of the mold, resulting in incomplete molding. Concrete manifestations: Uneven plasticization: If the temperature control of the plasticizing equipment is unstable or the rotational speed of the screw is inappropriate, it may lead to differences in the physical properties of the molten PVC raw materials during the flow process, thus making the wall thickness of some parts of the pipes thinner. Insufficient pressure: If the output pressure of the extruder is too low during the production process and cannot send enough molten PVC into the mold, this will also result in uneven pipe molding, especially in the distal or corner parts of the mold. The reasons for the uneven wall thickness of PVC pipes may involve multiple factors such as mold design, mold blockage, uneven plasticization, and insufficient pressure. UG Chemical has performed outstandingly in solving production problems in industries such as PVC, CPVC, and engineering plastics.

The production of PVC pipes has relatively high process requirements and is rather difficult. The problem of unsmooth inner and outer walls of the pipes often occurs. The conventional analysis directions are as follows: Ⅰ. For the unsmoothness manifested as roughness on both the inside and outside, it is mainly reflected in the following aspects: 1) If there are impurities in the raw materials, the additives are unevenly distributed, or expired resin is used, it will lead to poor material fluidity during the processing, thus affecting the surface quality of the pipes and resulting in a rough surface. 2) Unstable extrusion temperature: Too high or too low a temperature will affect the molten state of PVC, causing PVC to decompose, the surface to turn yellow or become uneven, or resulting in insufficient fluidity, forming an unsmooth surface or a rough feel. 3) Mold wear or improper design: The mold may wear out during the use process, or if the design is unreasonable, it will also lead to the appearance of wavy patterns or an unsmooth surface on the pipes. 4) Insufficient lubrication will cause poor demolding performance, and the inner and outer walls of the pipes will be rough and unsmooth. Excessive lubrication will lead to the problem of bleeding. Ⅱ. For the phenomenon manifested as wavy patterns, it is mainly reflected in the following aspects: 1) Uneven cooling: After the pipes are extruded, uneven cooling occurs, resulting in differences in surface tension and the appearance of wavy patterns. 2) Unstable traction force: The unstable traction force of the tractor leads to uneven stretching on the surface of the pipes, causing wavy patterns. 3) Uneven extrusion speed: Fluctuations in the extrusion speed will also lead to the appearance of wavy patterns on the surface of the pipes. This may be caused by the instability of the transmission system of the extruder or the screw rotation speed. In response to the surface problems in the production of PVC pipes, improvements can be made in the following aspects: 1. Equipment optimization: Regularly inspect and maintain equipment, especially molds and tractors. 2. Optimization of raw materials and formulations: Use high-quality PVC resins that meet the standards and avoid using expired or substandard raw materials. 3. Precise control of the cooling and traction processes: Avoid differences in tension caused by temperature differences during the cooling process. 4. Selection of appropriate lubricants: The use of efficient lubricant combinations can effectively reduce friction, improve fluidity, promote the plasticizing process, and reduce the occurrence of surface defects. The polyester homopolymer and polyester wax series products provided by UG Chemical can effectively help customers balance lubrication performance, improve plasticization, reduce precipitation, and perform outstandingly in improving the appearance quality and mechanical properties of pipes. #PVCPIPE #Polyesterhomopolymerization

When considering fusion, it makes sense that a higher temperature and shear experienced by the material should result in better properties due to a more complete fusion. On the other hand, scholars have presented data suggesting that certain properties such as impact strength show a maxima at a specific degree of fusion that can be below the highest achievable fusion.?However, with PVC’s tight processing window, more data is needed to properly account for the relationship between degree of fusion and degradation effects during processing. PVC resin will easily degrade at processing temperatures. This makes processing of PVC a difficult task. Typical melt temperature ranges for injection molding grade PVC resins are 160-220 °C. In general, injection and extrusion processes try to maintain the melt temperature below 200 °C to prevent excessive degradation. PVC can even begin to degrade under 160 °C. Therefore, at processing temperatures, the only thing preventing PVC from rapidly degrading are the heat stabilizers and additives that are partially being consumed.

?PVC granulation processing production process and related attention requirements The granulation process is a production process in which polymer resin and various additives and auxiliaries are measured, rolled, plasticized, and cut into granular plastics. Plastic granules are semi-finished products in the plastic molding processing industry and are also extrusion products. , injection molding, hollow blow molding, foaming and other forming processing raw materials. Resin is available in powder form and granular form For various plastic molding processing methods, compared with direct processing of powder materials, the advantages of using granulated pellets are as follows: (1) Feeding is convenient and there is no need to install a forced feeder in the feeding hopper. (2) The relative density of granular materials is higher than that of powder materials, and the strength of plastic products is better. (3) The mixing of resin and various solid powder materials or liquid additives is relatively uniform, and the physical properties of plastic products are relatively uniform. (4) Plastic products have uniform color. (5) The granular material contains less air agent volatiles, making plastic products less likely to produce bubbles. (6) The pellets have no pollution to the extruder and the production environment. #PVCgranulation

Top 10 applications of PVC pipes-1 Polyvinyl Chloride (PVC) stands third around the world as the most widely produced plastic polymer. The rigid form of PVC is used in making PVC pipes that have a diverse range of applications. Polyvinyl Chloride (PVC) pipes are the most commonly used plastic piping material. The PVC pipes are manufactured in various dimensions and sizes. They are extensively used in sewer systems, irrigation, water service lines, drain waste vents, and various industries. The properties of PVC pipes for safety, robustness, cost-efficiency, environmental performance, and recyclability allow them to be used for multiple purposes, from carrying water to industrial or chemical waste handling. PVC pipes can be used in underground areas as well as above-ground areas of any building. They also come in handy to be used in outdoor settings if they include UV inhibitors and stabilisers to protect against ultraviolet radiation and are painted with water-based latex paint. They are unaffected by commonly used chemicals such as salts, acids, oxidants, or bases. PVC pipes are an environment-friendly option that has an upper hand over the traditional piping system. The PVC pipes consist of low carbon plastic and require minimal resources and less energy in manufacturing. PVC pipes provide an excellent choice for carrying drinking water because they have a great level of inertness and are not prone to corrosion. PVC pipes last long with the smallest amount of maintenance and they are easily recyclable. The PVC pipes are extensively used because they are eco-friendly, durable, easy to install, resistant to corrosion, light in weight, have a long service life, inexpensive, and extensively accepted by codes. The top ten places where PVC pipes can be used are: 1. PVC Pipe for Water Plumbing and Water Pipes The PVC pipes have been widely used in water plumbing and pipes. It is the largest industry in PVC applications by quantity and weight mass. The PVC pipes were first used in the management of water and were further integrated into modern society and infrastructure. PVC pipes are available in various dimensions, lengths, and sizes. PVC water pipes are produced, modified, and regulated strictly. Most often, the process is overseen by the government or independent authorities. These authorities have set standards that guide the production process on the quality of material used when used in handling water. These regulations contribute to the continued use of PVC pipes as a non-toxic, long-lasting, and safe material for transporting drinking water, non-drinking water, and processed water. Other services and plumbing codes regulate the appropriateness of the PVC pipes for particular water installations. All the above applications of the PVC pipes are applicable only for water delivery up to a particular temperature. Due to the low-temperature threshold, the PVC pipes cannot be used for heated water delivery. #pvcpipes #pvcwaterpipes #WaterPipes

Top 10 applications of PVC pipes-2 4. PVC Pipes for Agriculture Agriculture is one of the largest and important sectors and is incomplete without PVC pipes. PVC pipes are used for all important functions of agriculture from bore-well to water irrigation, sprinklers and spraying of pesticides and fertilizers. PVC agricultural pipes are used for irrigation and pest control activities at farms. PVC pipes are resistant to all sorts of chemicals, corrosion, soil and fire. This makes them the best fit to be used for the transportation of pesticides and fertilizers into a farm. PVC agricultural pipes are very, do not require any maintenance and in optimum conditions last for more than 50 years. 5. PVC Pipe for Fire Sprinklers The PVC pipes have been approved to be used in the case of a light-hazard and multipurpose sprinkler system. PVC pipes are commonly used in the fire sprinkler system set up in public places like museums, theatres, libraries as well as in hotels, offices, and private buildings. The PVC pipes are immune to corrosion, scale, or any microbiological layer formation that leads to them being durable, low in maintenance as opposed to the traditional iron pipes. The PVC pipes used in the fire sprinkler system are not combustible and do not contribute to flashover. PVC pipes are light in weight, can be easily assembled in a small space, and offer non-corrosive properties. 6. PVC Pipes for Industrial Use PVC pipes have proven to be beneficial for use in the industrial sector. PVC piping can handle a wide range of substances, from cold water to the transport of hazardous chemicals. The property of high resistance to corrosion of the PVC pipes makes them extremely useful in industrial settings. The piping system for industrial use is required to be robust to endure the rough environment to carry chemicals or harmful waste. Thus, the PVC pipes meet this requirement and provide safe transportation for most of the substances in the industry. 7. PVC Pipe for Chemical Handling The product used for handling chemicals and industrial substances varies depending on the type of chemical, its compatibility with the chemical, and its tolerance. The PVC pipes are efficient in handling particular types of chemicals, as opposed to metal pipes. The long polymeric chains of PVC offers a high material resistance against degradation, chemical attack, and corrosion. The chlorine content in PVC makes it fire resistant and does not allow the flames to spread. Therefore, PVC pipe and plumbing are frequently applied for use in handling chemicals as well as their transfer, production, delivery, and processes. The PVC pipes can be used to transport chemicals like alcohols, organic acids, anhydride acids, hydrocarbons, halogens, oxidising acids, salts, inorganic acids, alkalis, and ammonia. #PVCPIPE #PVCPLUMBING

What is the difference between PVC anti-static floor PVC plastic floor and PVC anti-static floor? PVC anti-static floor is?also called dissipative static floor. The principle of pvc anti-static floor is that when it is grounded or connected to any lower point, the charge can be dissipated. The problems caused by static electricity are difficult to solve. Not only do we not deal with people who are sometimes more professional, it is also difficult to deal with, which causes confusion in our work and affects our daily work. Now the decoration is more popular with PVC flooring, PVC floor feels soft, warm, smooth decoration, joints less, can be achieved through the unique welding process, and no radiation, is a very environmentally friendly floor decoration materials. However, there are many types of?PVC flooring?. What is?PVC anti-static flooring?? What is the difference between PVC plastic floor and?PVC anti-static floor?? Here we explain the relevant knowledge of pvc anti-static floor! PVC anti-static floor is based on PVC resin, made of special processing technology, PVC particles form an electrostatic conductive network between the interface, with a permanent anti-static function. It looks like marble and has a good decorative effect. Applicable to telecommunication, electronic industry program control room, computer room, clean plant and other requirements of purification and anti-static places. PVC plastic floor is a new type of light floor decoration material that is very popular in the world today, also known as "lightweight floor material." It is a popular product of Japan and Korea in Europe, America, and Asia. It has become popular in foreign countries and has entered the Chinese market since the early 1980s. It has been widely recognized in large and medium-sized cities in China and has been widely used, such as indoor homes and hospitals. , schools, office buildings, factories, public places, supermarkets, businesses, stadiums and other places. "PVC plastic floor" refers to the floor made of PVC material. Specifically, polyvinyl chloride and its copolymer resin are used as the main raw materials, and additives such as fillers, plasticizers, stabilizers, colorants, etc. are added to the sheet-like continuous substrate by a coating process or through calendering, extrusion or extrusion. ? The difference between PVC plastic floor and PVC anti-static floor PVC anti-static floor is a plastic floor, the main ingredient for polyhexene data, the current PVC floor can be made into two kinds, one is the same through the heart, that is, from the bottom to the surface of the pattern material is the same, this floor If the outer surface is burned or scratched, it can be re-waxed with a grinding machine as if it were new, and there is a compound type, that is, the top layer is a pure PVC transparent layer (PVC wear resistance is very Good)

Raw Materials Used in CPVC Piping All CPVC products used in industrial plants today-such as piping, fittings, sheet and ducting-began as two separate materials: chlorine and ethylene. Chlorine?is one of the byproducts of chlor-alkali salt processing.?Ethylene?is extracted from petroleum that is put in a special facility called a cracker. Manufacturers then react these two materials together to form a new liquid chemical:?ethylene dichloride (EDC). Then, through an oxychlorination process, EDC is dehydrated, heated an ultimately broken down into?vinyl chloride monomer (VCM). has no real uses in its monomer form, as it is an unstable chemical intermediate and gaseous under normal conditions. It must be stored under pressure in order to maintain a liquid state. The vinyl chloride monomer needs to be transformed into a polymer-a chain of monomers-to become strong, stable and useful. To do this, manufacturers polymerize VCM in a high-pressure reactor, forming?polyvinyl chloride-or PVC. Manufacturers produce the PVC resin and ship them to production facilities, such as Corzan Industrial Systems`, where the PVC is used to form CPVC. PVC producers may also ship the pellets to PVC manufacturers to be molded for finished PVC products. #CPVCPIPE #CPVCPiping #CPVC

Types of PVC Foam Board/sheet PVC foam board (PVC expandido, plastwoood) is generally divided into PVC co-extrusion board, PVC Celuka board, and PVC free-foam board. The above can be called PVC foam board, also known as the Sintra board and Andy board. Its main chemical composition is polyvinyl chloride (PVC). PVC foam board has the characteristics of anti-corrosion, moisture-proof, mold-proof, non-water absorption, drillable, sawable, planed, easy thermal forming, thermal bending processing, and so on. Therefore, it is often used in furniture, cabinet, bath cabinet, exhibition rack board, box cores, indoor and outdoor decoration, building materials, chemical industry and other fields, advertising signs, printing, silk screen printing, spray painting, computer lettering, electronic instrument product packaging, and other industries. PVC co-extruded foam board adopts the advanced production process of [co-extrusion by two extruders." The surface layer has no foam, a smooth surface, and high hardness. Product application: mainly used for craft grade carving products, such as various shoe cabinets, shoe racks, storage racks, screen partitions, etc. PVC Celuka foamed board is produced by the Celuka process, with a layer of hard skin on the surface, which is smooth, flat, high hardness, good mechanical properties, high product precision, small thickness error, and strict requirements on mold, formula, process and raw materials. Product application: it is mainly used for engraving. The board has good hardness and can be carved into various shapes without rough edges; At the same time, it is also widely used as the substrate material for PUR lamination of furniture cabinets. It is environmentally-friendly, formaldehyde-free, light, and easy to process. PVC free-foam board has a loose surface, no crust, and presents a fine concave-convex pitted texture, which is conducive to printing, spraying, and veneering. It can be produced by using ordinary foaming mold, and the process is relatively easy to control. Product application: the product is mainly used for advertising mounting, photo, silk screen printing, etc. #PVCfreefoamboard #PVCFOAMBOARD #PVCboard