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Measuring Instruments for Resin Production Processes
Any polymer compound that can be used as a raw material for plastic product processing is called a resin. Resins typically soften or melt when heated. When softened, they tend to flow under external forces. At room temperature, they are solid, semi-solid, or sometimes liquid.
Resins are diverse and require demanding reaction conditions. The process demands precise measurement of multiple parameters, including temperature, pressure, flow rate, liquid level, material level, pH, conductivity, and vacuum.
Focusing on the typical process of resin technology, we will systematically analyze the application scenarios, selection points, and precautions of various measuring instruments in different links.
Overview of Resin Production Process Measurement Requirements
Resins come in a wide variety of types, including phenolic, epoxy, unsaturated polyester, polyurethane, and acrylic. Their production typically involves the following core processes:
Raw material storage and feed ratio;
Premixing and heating;
Main reaction stage (usually pressurized or depressurized reaction);
Cooling, degassing, and dilution;
Filtration and packaging;
Key measurement requirements for each stage are as follows:
Parameters
Application Purpose
Temperature
Control reaction rate to prevent side reactions and thermal runaway;
Pressure
Maintain stable pressure in the reactor to avoid overpressure accidents;
Liquid level
Control the charging/discharging rhythm to prevent overflow or empty tank operation;
Material level
Determine the remaining level in the raw material silo to implement raw material early warning and lean feeding;
Flow
Control raw material ratio, solvent addition rate, and finished product metering;
Vacuum
Control reaction conditions to promote byproduct removal;
pH/conductivity
Monitor neutralization and catalysis processes to ensure reaction completion;
Density/viscosity
Assist in determining finished product quality and fluidity.
In resin production, material level measurement in containers such as raw material silos, solid additive drums, and powder feed silos is used to determine inventory levels, prevent material shortages, and improve material scheduling efficiency.
Common measurement targets:
Solid powders (such as talc, fillers, and curing agents);
Small resin particles (such as thermosetting prepolymers);
Liquid, high-viscosity raw material drums;
For large solid raw material silos, a non-contact radar level meter (with self-cleaning function) is recommended.
For small drums of raw materials, point-level switches (such as low-level alarms) can be used to assist with material early warning within the MES system.
If automation of the feeding process is highly required, a continuous level meter should be selected and interlocked with the DCS/PLC system.
5. Flow Measurement
Instrument Type: Gear flowmeter, Coriolis mass flowmeter
Typical Applications: Raw material conveying lines, solvent dosing lines, product filling lines
For low-viscosity liquids (such as monomers and solvents), electromagnetic or turbine flowmeters are recommended. For high-viscosity, high-temperature fluids (such as reactants and resin slurries), mass flowmeters are preferred. For highly corrosive media, flowmeters lined with PTFE or PFA are recommended.
Temperature transmitters convert input signals from various sensors into standard output signals. Typically, these are 4-20 mA or 0-10 V. Examples include resistance sensors, thermocouples, and potentiometers. Temperature transmitters connect temperature sensors to subsequent data processing and control systems. It ensures the stability and safety of the production process. Sino-Inst offers a variety of temperature transmitter … Read more
From extraction to use, natural gas undergoes long pipeline transportation, filtration, storage, and pressure regulation. Monitoring pipeline pressure during these processes is crucial to ensuring proper system operation. Natural gas pressure transmitters are designed to accurately measure a variety of gas pressures. Low and high pressures, gauge pressure, absolute pressure, and differential pressure can all … Read more
An oval gear flowmeter, also known as a displacement flowmeter, is a type of positive displacement flowmeter and offers the highest accuracy among flow instruments. It is particularly suitable for measuring the flow of highly viscous liquids such as heavy oil, asphalt, paint, diesel, and bunker fuel. An oval gear flowmeter uses a mechanical measuring … Read more
How to measure the flow of viscous liquids? For example: glue, heavy oil, asphalt, etc. Commonly used flow meters may not be suitable. High Viscosity Flow Meters are instruments for measuring the flow of viscous fluids. Common high viscosity flow meters are: Oval Gear flow meters. Mass flow meters, Target flow meters, and Wedge flow … Read more
Slurry and sludge flow measurement is complex and challenging. Accurately measuring slurry flow can improve efficiency and reduce costs in industries such as wastewater treatment, water conservancy projects, river dredging, and oil well cementing. Slurry flow meters measure the volumetric flow of sludge and slurries in pipelines. Examples include cement slurry, mud, pulp, various acid, … Read more
Explosion-proof ultrasonic level meters are specifically designed for level measurement in flammable and explosive environments. Die-cast aluminum alloy waterproof and explosion-proof housing. Sino-Inst explosion-proof ultrasonic level meter has an explosion-proof grade of Ex dⅡCT6 Gb. It is primarily used for monitoring the level of tanks containing media such as diesel, gasoline, and lubricating oil. Non-Contact Measurement … Read more
Pressure and flow in pipelines are two important parameters for industrial processes. Pressure or differential pressure, flow rate, and pipe diameter are all related. For example, the Bernoulli equation, the Poiseuille equation, etc., all try to sort out the relationship between pipeline flow, pressure, and pipe diameter. It is important to monitor pressure and flow … Read more
Electromagnetic heat meter is an inductive instrument for measuring conductive media, suitable for measuring the volume flow of conductive liquids with a conductivity greater than 5μs/cm. The electromagnetic heat meter consists of a flow measurement unit, a heat calculation unit and a paired temperature sensor (PT1000), which can calculate, accumulate, store and display the amount … Read more
Ultrasonic vs Magnetic Flow Meter, are you confused about which one to choose? Sino-Inst, based on our years of experience in flow measurement services, has compiled this blog, hoping to help you! Ultrasonic flow meters and electromagnetic flow meters are both commonly used liquid flow meters. Because of their different working principles, they both have … Read more
Shaft Torque Sensors are devices that can directly measure the torque of a rotating shaft. This refers to the mounting structure of the torque sensor, such as a flange torque sensor. Compared with flange-mounted torque sensors, shaft-mounted torque sensors take up less space and are relatively inexpensive. Shaft Torque Sensors can be dynamic torque sensors … Read more
Resin, as an important organic synthetic material, is widely used in various fields of modern industry. Measuring instruments can effectively monitor the production and application of resins in real time, helping to improve production efficiency and reduce costs.
Sino-Inst supplies pressure, level, flow, temperature, and other measurement and control instruments. If you require measurement of resin-related parameters, please feel free to contact our engineers!
Zhang Wei, possesses 20 years of experience as an automation instrumentation engineer, specializing in the research, design, installation, commissioning, and maintenance of automation instruments.
Face to various instrument communication protocols (such as Modbus, Profibus, etc.), with solid hardware circuit design and software programming skills (proficient in C language and PLC programming). Has extensive project experience; projects he has led and participated in have all achieved outstanding results, improving product accuracy, reducing costs, and increasing production efficiency.
Possesses excellent communication and coordination skills and a strong team spirit, enabling him to quickly respond to customer needs and provide high-quality automation instrumentation solutions.
