Polyurethane Machinery Glossary | PU Terms & Manufacturing Guide

The isocyanate side of polyurethane two-component system usually contains MDI, TDI or modified isocyanate. Relationship: It belongs to the term of raw material side and determines the source of NCO, reactivity and hard segment structure.

The ability of materials to resist friction loss is the core performance of polyurethane elastomers, soles, cots, sieve plates and industrial wheels. Relationship: It is a physical index and is often used to judge whether PU products are suitable for high wear scenes.

Auxiliary materials added to polyurethane system to adjust reaction, cell, flame retardant, color, flow or durability. Relationship: It belongs to the formula term and affects the processing window and final performance.

The ability of air to pass through the cell structure of foam is often used to evaluate soft foam and open-cell foam. Relationship: It belongs to the foam performance index and is related to the porosity, comfort and sound absorption.

The catalyst used to accelerate polyurethane foaming reaction or gel reaction has obvious influence on milky time, rising time and demoulding time. Relationship: It belongs to the terminology of formula and reaction control.

The polyol side of polyurethane two-component system usually contains polyol, catalyst, foaming agent, silicone oil, color paste and additives. Relationship: It belongs to the raw material side term and determines the soft segment, bubble and most process parameters.

Commonly used diol chain extenders can improve the hardness and strength of polyurethane elastomer, TPU and sole materials. Relationship: it belongs to the term of small molecular chain extender.

Gas is generated by chemical reaction or physical volatilization, which makes polyurethane form a component with cellular structure. Relationship: it belongs to the core term of foaming formula.

The gas holes in the product may come from moisture content, mixing, defoaming, mold exhaust or mismatch of reaction speed. Relationship: It belongs to defect diagnosis terminology and is often used in soles, elastomers, rigid foams and transparent castings.

The mass per unit volume of material is often used to describe the density of block foam, hard foam, plate or granular material. Relationship: it belongs to the basic physical index.

Polyurethane elastomer formed by liquid casting reaction is suitable for products with high wear resistance and high load bearing. Relationship: a term belonging to material type and process type.

Different catalysts will change the reaction curve and demoulding rhythm of materials that accelerate polyurethane gel reaction or foaming reaction. Relationship: it belongs to the terminology of formula and process control.

The tiny holes in polyurethane foam are important structures that determine density, heat conduction, resilience, strength and appearance. Relationship: it belongs to the term of foam structure.

The size and distribution of cells will affect the fineness, thermal insulation, mechanical properties and appearance of foam. Relationship: It belongs to the terms of foam structure and quality control.

Small molecular diols or diamines are used to extend the molecular chain of polyurethane and improve hardness, strength and wear resistance. Relationship: It belongs to formula terminology and is commonly found in elastomer, TPU and sole system.

The proportion of closed cells in foam structure, rigid foam and thermal insulation materials are usually more concerned about this index. Relationship: it belongs to the performance index of rigid foam and is related to heat preservation, waterproof and dimensional stability.

The structure with independent closed cells usually has better thermal insulation, waterproof and pressure-bearing performance. Relationship: it belongs to the term of foam structure, which is common in hard foam, sprayed foam and sandwich panel.

The lower the ratio of permanent deformation left after the material is compressed and recovered, the better the recovery ability is usually indicated. Relationship: It belongs to physical property test index, and is often used for foam, seal and elastomer.

The ability of materials to resist compressive load is commonly used in rigid foam, structural foam and elastomer. Relationship: it belongs to mechanical performance index.

The time when the system begins to whiten, foam or expand after the mixing of materials A and B is the sign that the foaming reaction begins to appear. Relationship: it belongs to the term of reaction curve and is used to judge the start-up speed of foaming system.

Components that can form a three-dimensional network structure are used to improve the strength, heat resistance, dimensional stability and chemical resistance of materials. Relationship: a formula term.

Polyurethane continues to react from liquid or semi-solid to form a stable structure. Relationship: it belongs to the term of molding process and affects demoulding, post-curing and final properties.

Raw material tanks used for short-term feeding in production site are usually matched with temperature control, stirring, liquid level and pressure control. Relationship: it belongs to the terminology of polyurethane equipment feeding system.

The time when the product can be taken out of the mold is an important parameter to calculate the productivity and production rhythm. Relationship: it belongs to the technical beat term.

The quality of materials per unit volume is the most basic performance index of polyurethane foam, elastomer and thermal insulation materials. Relationship: it is a physical index, but it cannot be equated with hardness or bearing capacity alone.

Common small molecular alcohol raw materials can be used as formula components to affect reaction speed, hardness and processability. Relationship: It belongs to the terminology of raw materials and formula.

The ability of a material to maintain its size under temperature, humidity or aging conditions. Relationship: It belongs to the important properties of rigid foam, sandwich panel, molded parts and elastomer.

Polyurethane sole structure with different density or hardness layers in the same sole. Relationship: it belongs to the applied product term, which is used to give consideration to shock absorption, support and wear resistance.

The way to complete the mixing of materials A and B or multi-components by rotating the stirring element. Relationship: it belongs to the terminology of mixing technology, and is commonly used in low-pressure machines and elastomer pouring machines.

The basic parameters used to calculate the ratio of NCO to OH are the core concepts in polyurethane formula calculation. Relationship: It belongs to stoichiometric terms.

The point at which the exothermic reaction of polyurethane reaches the highest temperature, which may cause scorching, cracking or safety risk. Relationship: It belongs to the terms of reaction monitoring and safety.

Solid powder or particles added to polyurethane system are used to reduce cost, improve hardness, improve dimensional stability or give special functions. Relationship: it belongs to the term of formula and functional modification.

Additives used to reduce the combustion risk of polyurethane materials or meet the requirements of flame retardant grade. Relationship: it belongs to safety, regulations and formula terms.

Traces left on the surface by the flow path of materials are common in soles, elastomers, molded parts and coated products. Relationship: it belongs to the diagnosis term of appearance defect.

The output of raw materials per unit time is the basis of polyurethane equipment selection, pouring time and capacity calculation. Relationship: it belongs to the terms of equipment measurement and capacity.

Often refers to silicone oil additives, which are used to stabilize cells, adjust the structure of open and closed cells and improve the fineness of foam. Relationship: it belongs to the core auxiliary agent of foaming formula.

Density of polyurethane formed by natural foaming under the condition of not being limited by mold. Relationship: it belongs to the formula evaluation index and is used to judge the foaming ability of the system itself.

The number of reactive functional groups in the molecule affects the crosslinking degree, hardness and network structure of polyurethane. Relationship: it belongs to the terminology of raw material structure and formula design.

The metering pump for conveying raw materials through gear meshing is suitable for continuous and stable metering within a certain viscosity range. Relationship: it belongs to the terminology of polyurethane equipment metering system.

The time when the mixture begins to form sufficient gel strength and drawable filaments or structures begin to establish. Relationship: It belongs to the term of reaction curve and affects mold filling, bubble collapse and demoulding.

The process of isocyanate reacting with active hydrogen such as polyol to form polymer network. Relationship: it belongs to the term of reaction mechanism, and together with foaming reaction determines the stability of foam.

Metering and dispersing system for stably adding graphite, carbon black or other functional powder into polyurethane system. Relationship: it belongs to the technical terms of equipment and functional fillers, and is often used in flame retardant, heat conductive or special foam systems.

The ability of materials to resist indentation or local deformation is commonly expressed by Shore hardness or foam indentation hardness of polyurethane. Relationship: it belongs to physical property index.

Aliphatic isocyanates are commonly used in yellowing resistant coatings, adhesives and high performance polyurethane systems. Relationship: It belongs to the terminology of isocyanate raw materials.

Polyurethane soft foam with high resilience is often used in high-end cushions, mattresses and car seats. Relationship: it belongs to the term of soft foam material type.

Polyurethane equipment for realizing rapid and uniform mixing of A and B materials through high-pressure impact mixing. Relationship: it belongs to the term of core equipment and is often used in automobiles, refrigerators, sandwich panels, soles and rigid foam products.

The ability of materials to resist the degradation of molecular chains caused by moisture and damp heat. Relationship: it belongs to the durability index, and the application of shoe materials, elastomers and water environment is particularly concerned.

The hydroxyl group in polyol is the key group that reacts with NCO to form polyurethane chain segment. Relationship: it belongs to the core chemical term of polyurethane.

The index to measure the hydroxyl content in polyol directly affects the formula ratio, reaction activity and material hardness. Relationship: It belongs to polyol technical parameters.

The reaction force generated when foam is compressed to a certain proportion is used to evaluate the bearing capacity and comfort of soft foam. Relationship: it belongs to the physical index of foam.

Usually refers to the isocyanate index, that is, the ratio of the actual NCO dosage to the theoretically required NCO dosage. Relationship: it belongs to formula calculation terminology.

Polyurethane material with dense skin layer on the surface and cellular structure inside during foaming. Relationship: it belongs to the terminology of foam type and molding process.

Isocyanate with good weather resistance and yellowing resistance is often used in coatings, adhesives and special elastomers. Relationship: It belongs to the terminology of isocyanate raw materials.

Reactive raw materials containing NCO groups are the key components to form hard segments and reaction networks in polyurethane systems. Relationship: it belongs to the terminology of polyurethane core raw materials.

The ratio of the amount of isocyanate actually added to the amount required for theoretical reaction is used to control hardness, crosslinking, foaming and properties. Relationship: it belongs to the core index of formula design.

As an index to measure the heat transfer capacity of materials, rigid foam insulation materials usually pursue lower thermal conductivity. Relationship: it belongs to the thermal insulation performance index.

The minimum oxygen concentration required to maintain the combustion of materials is used to evaluate the flame retardant performance. Relationship: It belongs to safety and performance test indicators.

Polyurethane equipment for mixing materials through dynamic stirring or low-pressure mixing head. Relationship: It belongs to the terminology of core equipment, and is suitable for medium and low yield, multi-formula or some special processes.

A container for storing materials A, B or additives, usually with temperature control, stirring, liquid level and pressure control. Relationship: it belongs to the terminology of polyurethane equipment feeding system.

Common isocyanate, widely used in hard foam, elastomer, sole, adhesive and thermal insulation materials. Relationship: It belongs to the terminology of isocyanate raw materials.

Accurately conveying the core components of materials A and B determines the stability of proportioning, discharging accuracy and repeatability. Relationship: it belongs to the terminology of core components of polyurethane equipment.

Polyurethane material that can be mixed and vulcanized like rubber. Relationship: a material type term.

The final mixing position of A and B materials is the key component that determines the mixing quality, cleaning method and pouring accuracy. Relationship: it belongs to the terminology of core components of polyurethane equipment.

The ratio between A and B materials or multi-components is the basis of equipment measurement and product quality. Relationship: it belongs to the terminology of formula and equipment measurement.

Traditional polyurethane elastomer amine chain extender needs to pay attention to regulations, safety and alternatives when using. Relationship: it belongs to chain extender and safety compliance terminology.

The material coated on the surface of the mold is used to help polyurethane products demould smoothly and improve the surface quality. Relationship: it belongs to production accessories and technical terms.

The mold surface temperature will affect the flow, skin, curing, demoulding and product appearance. Relationship: It belongs to process control parameters.

The actual density of polyurethane formed after limited foaming in the mold is usually higher than that of free foaming. Relationship: It belongs to the foam quality index.

The mass percentage of unreacted NCO in isocyanate or prepolymer is used to calculate the formula ratio and the dosage of chain extender. Relationship: it belongs to the terms of formula calculation and raw material detection.

The mass percentage of unreacted NCO in isocyanate or prepolymer is used to calculate the formula ratio and the dosage of chain extender. Relationship: it belongs to the terms of formula calculation and raw material detection.

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The process of forming a uniform cell starting point by gas, physical means or nucleating agent. Relationship: it belongs to the control term of foaming structure.

The process of mixing isocyanate, polyol, chain extender and catalyst at one time. Relationship: it belongs to the terminology of polyurethane molding process.

The interconnected structure between cells makes it easier for air and moisture to pass through, which is common in soft foam and sound-absorbing foam. Relationship: it belongs to the term of foam structure.

Small holes appear on the surface of products, which are common in spraying, pouring, coating and sole surface problems. Relationship: it belongs to the diagnosis term of appearance defect.

Polyols with ester bond as the main chain structure can bring better mechanical strength, oil resistance and wear resistance. Relationship: it belongs to the term of polyol raw materials, but hydrolysis resistance usually needs to be paid attention to.

Polyols with ether bond as the main chain structure have good hydrolysis resistance and are widely used in soft foams, hard foams, soles and elastomers. Relationship: it belongs to the terminology of polyol raw materials.

Rigid foam system with higher isocyanate index and stronger heat resistance and flame retardancy. Relationship: it belongs to the terminology of hard foam and building insulation materials.

Multifunctional MDI is commonly used in hard foam, sandwich panel, spraying, refrigerator insulation and structural foam. Relationship: It belongs to the terminology of isocyanate raw materials.

Polyurethane raw material containing multiple hydroxyl groups is the main body of material B, which determines the soft segment, elasticity, flexibility and partial hydrolysis resistance. Relationship: it belongs to the terminology of polyurethane core raw materials.

High-performance polyether polyol is often used in polyurethane elastomer with wear resistance, low temperature resistance and good resilience. Relationship: it belongs to the term of high-performance polyol raw materials.

A large class of polymer materials formed by the reaction of polyols and isocyanates can be used as foams, elastomers, coatings, adhesives and sealants. Relationship: it belongs to the general term and is the core entity of the whole knowledge base.

Polyurethane materials with cellular structure formed by foaming reaction can be divided into soft foam, hard foam, semi-hard foam and self-skinning foam. Relationship: a material type term.

The process of heating or placing the product after demoulding to make the reaction more complete and the performance more stable. Relationship: it belongs to the term of post-processing after molding.

Time window during which mixed materials can still flow, pour or construct. Relationship: it belongs to the technical window term and is often used in elastomer, adhesive and manual pouring system.

The components that output the mixed materials to the mold or product position can cooperate with the manipulator to realize trajectory pouring. Relationship: a term that belongs to the terminal executive component of equipment.

Equipment for quantitatively pouring mixed polyurethane materials into molds or workpieces. Relationship: It belongs to the terminology of polyurethane molding equipment.

The intermediate formed by the pre-reaction of isocyanate with some polyols is often used in CPU elastomer and special pouring system. Relationship: it belongs to the terminology of formula and process route.

Polyurethane-based adhesive materials are often used in shoe materials, composite films, wood, automobiles and construction fields. Relationship: a CASE application term.

Polyurethane thin layer material used for surface protection, wear resistance, water resistance, weather resistance or decoration. Relationship: it belongs to applied material terminology.

Polyurethane materials with rubber elasticity and high wear resistance can be molded by casting, injection molding or mixing. Relationship: a material type term.

Polyurethane material used for packaging and protection of electronic components, batteries, sensors, etc. Relationship: it belongs to electronic and new energy application terms.

Industrial roll parts coated or cast with polyurethane are used for transportation, printing, mining and mechanical equipment. Relationship: it belongs to the terminology of elastomer application products.

Building and cold storage insulation board with PU or PIR rigid foam as core material and metal plate as surface material. Relationship: it belongs to the application term of continuous production of hard foam.

Polyurethane sealing material with elasticity and adhesive ability is often used in construction, automobile and industrial joints. Relationship: a CASE application term.

Soles made of polyurethane foam or elastomer are common in safety shoes, casual shoes, sandals and high-end shoes. Relationship: it belongs to the application term of shoe materials.

The industrial wheel made of polyurethane elastomer has wear resistance, load bearing and shock absorption properties. Relationship: it belongs to the product term of elastomer application.

A and B materials are quickly mixed and injected into the mold for reaction molding, which is often used in automobile parts and large lightweight products. Relationship: it belongs to the terminology of molding process and equipment.

The combination of time parameters such as milky white, gel, rising, surface drying and demoulding is used to judge whether the system is suitable for the equipment beat. Relationship: it belongs to process diagnosis terminology.

Raw materials are circulated between the equipment pipeline and the material tank to keep the temperature, pressure, uniformity and metering stable. Relationship: it belongs to the terminology of equipment feeding and metering system.

The ability of a material to rebound and recover after being impacted or compressed affects comfort, cushioning, and dynamic performance. Relationship: This is a physical property indicator.

The time from the beginning of mixing to the maximum height of foam. Relationship: It belongs to the term of foaming reaction curve.

Reinforcing fillers or fibers are added to RIM to improve rigidity and structural strength. Relationship: It belongs to RIM derivative process term.

Polyurethane foam between soft foam and hard foam is often used in automobile interiors, buffers and energy-absorbing parts. Relationship: a term belonging to the foam type.

The hardness index measured by Shore hardness tester is often used for soles, elastomers, cots and soft materials. Relationship: it belongs to hardness testing terminology.

The weight of the material entering the mold or product in a single pouring directly affects the gram weight, density and size of the product. Relationship: it belongs to the terms of equipment measurement and product quality.

The volume shrinkage or size reduction of foam after molding may be related to formula, closed-cell gas, curing and demoulding time. Relationship: it belongs to defect diagnosis terminology.

Foam stabilizer commonly used in polyurethane foaming is used to adjust the cell structure and foam stability. Relationship: it belongs to the terminology of foaming AIDS.

Materials A and B are mixed in a spray gun, sprayed on the surface of the base material and quickly foamed and solidified. Relationship: it belongs to the application term of hard foam spraying.

Process of structural parts formed by reaction of fiber reinforced materials and polyurethane. Relationship: It belongs to RIM derivative process term.

The materials are mixed through the structural parts in the static mixing tube, and do not rely on rotary stirring. Relationship: it belongs to mixed process terminology.

The ability of raw materials to maintain viscosity, activity and appearance stability under specified storage conditions. Relationship: It belongs to the terminology of raw material management and quality control.

The time when the surface of the product loses its stickiness and can be lightly touched for non-adhesion. Relationship: It belongs to the terms of reaction curve and operation window.

The ability of materials to resist the continuous expansion of cracks is commonly used in soles, elastomers and soft bubbles. Relationship: it belongs to mechanical performance index.

A document that records the technical parameters such as viscosity, proportion, density, hardness and strength of raw materials or products. Relationship: It belongs to the terms of purchasing, equipment selection and process confirmation.

The ability of materials to resist fracture in tension. Relationship: it belongs to mechanical performance index.

The lower the rigid foam thermal insulation material, the better the thermal insulation performance. Relationship: it belongs to the thermal insulation performance index.

Polyurethane materials that can be processed by heating and melting are often used in shoes, pipes, films, cables and injection molded parts. Relationship: a material type term.

Common isocyanates are widely used in flexible polyurethane foams, especially sponges, furniture foams and partially molded foams. Relationship: It belongs to the terminology of isocyanate raw materials.

The core chemical structure in polyurethane molecular chain is the basis of polyurethane material naming. Relationship: it belongs to the basic chemical structure term.

Removing bubbles in raw materials or mixtures by vacuum is often used for transparent CPU, elastomer and products with high appearance requirements. Relationship: it belongs to the technical terms of equipment and quality control.

The index of raw material flow resistance affects the selection of metering pump, mixing effect, pipeline design and temperature control requirements. Relationship: It belongs to the terminology of raw material parameters and equipment design.

Large holes formed by lack of materials or gas accumulation in products will affect strength, appearance and service life. Relationship: it belongs to defect diagnosis terminology.

Volatile organic compounds are related to odor, environmental protection, automobile interior decoration and indoor application requirements. Relationship: it belongs to environmental protection and application compliance terms.

The proportion of water absorbed by materials affects heat preservation, buoyancy, dimensional stability and durability. Relationship: It belongs to the performance test index.

CO2 produced by the reaction between water and isocyanate is used as foaming gas. Relationship: It belongs to the terminology of foaming chemistry and environmental protection formula.

The mixed materials are still suitable for pouring, coating, potting or construction.

The ability of a material to resist yellowing caused by light, heat, oxygen or chemical action. Relationship: It belongs to the appearance durability index, and white, transparent and light-colored products are particularly concerned.

The process objective is to reduce porosity, pinholes, and surface defects in footwear materials through spraying techniques and stable mixing control. (Relationship: This is a term related to polyurethane spraying applications in footwear manufacturing.)