Configuration and matters needing attention of glass fiber drawing slurry

Application of sizing agent in glass fiber and 100 matters needing attention in glass fiber production-common sense of sizing agent 1. Classification of glass fiber products? Yarn, cloth, felt, etc. 2.2. Common classification and use. FRP products? Hand paste, mechanical molding, etc. 3. What is the action principle of wetting agent? Interface bonding theory iv. What is the classification of wetting agents? Reinforce and strengthen textiles, etc. 5. What kinds of enhancing wetting agents are there? Winding, pultrusion, SMC, spraying, etc. 6. What is the difference between glass fiber production and products? Classification, requirements, differences, grades, etc. Yarn 7. What are the formulas of general sizing agents? Main film former, auxiliary film former, lubricant, antistatic agent, etc. 8. What are the wetting agent film-forming agents? What are their characteristics? Polyester resin, epoxy resin, polyurethane, PVAC, acrylate, etc. 9. What are the functions of different formulas? Film forming, hardening, soaking, etc. 10. Why do different manufacturers have different wetting agents? Technology, climate, etc. 1 1. What components can be adjusted in the size formula without affecting the basic properties of the yarn? Lubricant, antistatic agent, auxiliary film forming agent, etc. 12. What are the differences between different lubricating components in the formula? Dry lubrication, wet sliding, etc. 13. What is the function of coupling agent in glass fiber production? What's the difference between different coupling agents? Interfacial bonding, different reinforced matrix resins, etc. 14. What's the difference between hard yarn and soft yarn? How to classify? Stiffness, monofilament diameter, etc. 15. Why are the production conditions of medium-alkali yarns different in different climates? Moisture absorption, climate, etc. 16. What is the difference between pultruded profiles and pipes, and what are the requirements for yarn properties? Strength, toughness, etc. 17. What kinds of sizes are used for textile yarns? Paraffin type, 7 1 1, 8 1 1, starch type, etc. 18. What kinds of modified starch are there? What are their characteristics? Esterification, etherification, etc. 19. What are the components of textile size? What is the function? Film former, plasticizer, lubricant, etc. 20. What are the main film formers of the enhanced textile yarn sizing agent? What are their characteristics? Epoxy, PU, polyester, PVAC, acrylate, etc. 2 1. What are the characteristics of different sizes for textile yarns? Paraffin preparation, starch preparation, strengthening preparation, etc. 22. How to choose coupling agent in reinforced textile yarn size? Why? The types and functions of coupling agents are different with different resins of reinforced base materials. 23. What are the wetting agents and film-forming agents of glass fiber for plastics? Epoxy, PU, polyester, acrylate, etc. 24. Why do you want to use fungicides in the sizing agent? What kinds are there? Questions and answers about the procurement, transportation and testing of emulsifiers, organotin and formalin. 25. What preparations and understandings should be made before purchasing wetting agents? Variety, related cost budget, service cycle, supporting raw materials, etc. 26. What are the precautions for transportation and storage of wetting agent? Temperature, leakage, labels, etc. 27. What are the precautions for understanding, testing and using the required raw materials when buying wetting agents? The performance of raw materials, the function in the formulation of wetting agent, the test index of raw materials, preparation technology, precautions in use, etc. 28. What are the precautions for purchasing coupling agents? Matters needing attention in the preparation of three wetting agents: purity, chromaticity, production date and packaging. How should the coupling agent be dispersed? Concentration, PH value, etc. 30. Why use glacial acetic acid when coupling agent is dispersed? Fast hydrolysis and slow polymerization 3 1. Why does hydrolytic coupling agent fail? Best use time? The principle and time of hydrolysis. 32. What should I pay attention to when preparing slurry? Dispersion of coupling agent, uniformity of raw materials, dosage of preparation, etc. 33. What is the difference between tank kiln and unit kiln in the preparation of slurry? Batch preparation, rapid circulation, uniformity, etc. 34. What is the difference between the recovery and circulation of wetting agent in the production process of tank kiln and unit kiln? What are the precautions? Single machine and circulating pipeline, solid content, uniformity, etc. 35. If there is a problem with the wetting agent, what will happen during the drawing process? How to judge? How to deal with it? Flying wire, broken head, excessive lubrication, etc. 36. Preparation of starch slurry and matters needing attention? Gelatinization temperature, cooking, emulsification, use temperature, etc. 37. What indicators should be tested for the prepared slurry? What are the characteristics, requirements and common problems of four different types of fibers such as solid content and PH value in production? 38. What are the main types of chopped yarns? PA, BMC, PVAC, etc. 39. What's the difference between different kinds of chopped yarn sizing agents? Solid content, oil content, film forming agent, etc. 40. According to the use requirements, what are the main types of felt yarns? Hardness, oil content, felt classification, etc. 4 1. What's the difference between the size of the same felt yarn? Solid content, oil content, film forming agent, etc. 42. What are the main types of winding yarns? Direct yarn, plied yarn, alkali-free medium, etc. 43. What are the different requirements of different winding yarns for sizing? Solid content, oil content, film forming agent, etc. 44. What is the difference between pool kiln and unit kiln in wire winding production process? Type, scale and production efficiency, etc. 45. What are the specific requirements of each section in the winding yarn production process? What should I pay attention to? Stretching, doffing, packaging, etc. 46. What is the intuitive standard to judge the winding quality? Drawing, yarn withdrawal, soaking speed, wool, etc. 47. What are the precautions in the production of air-jet yarn? What is the intuitive criterion for judging its quality? Stretching, yarn withdrawal, saturation speed, stiffness, etc. 48. What are the precautions for SMC yarn in the production process? What is the intuitive criterion for judging its quality? Stretching, yarn withdrawal, penetration speed, stiffness, etc. 49. What are the precautions for the yarn used for felting in the production process? What is the intuitive criterion for judging its quality? Stretching, yarn withdrawal, soaking speed, stiffness, etc. 50. What are the precautions in the production of chopped yarn? What is the intuitive criterion for judging its quality? Drawing, shredding, graininess, etc. 5 1. What's the difference between a tank kiln and a unit kiln for yarn spraying? Scale, production efficiency, stability, uniform beam splitting, etc. 52. What is the difference between the production tank kiln and the unit kiln of SMC yarn? Scale, production efficiency, stability, etc. 53. What is the difference between the tank kiln and the unit kiln for producing felt yarn? Scale, production efficiency, stability, uniform beam splitting, etc. 54. What is the influence and correlation between the quality of yarn for chopped strand mat and the production of chopped strand mat? Shorten process, smoothness of felt surface, air permeability of felt, etc. 55. Why does the winding yarn come out of loop in the process of pultrusion? Soft yarn, excessive lubrication, etc. 56. What are the influencing factors of yarn shedding in the process of chopped strand mat production? Drawing process, slurry formula, etc. 57. Why is there a difference between grooveless 400-hole drawing and two-point drawing of SMC yarn? What's the impact? Different product requirements. Why does the yarn have a lot of bending in the process of producing SMC in unit kiln? Diameter of drawing head, drawing of paper tube, shrinkage of slurry, etc. 59. Why are there differences in oil content among different yarn varieties? Drying difference, sizing agent migration, etc. 60. What's the difference between the winding yarns of reinforced epoxy and reinforced polyester? The difference between coupling agent and base resin. 6 1. What is the difference between the textile yarn production section and other glass fiber production sections? Effects of five kinds of sizing agents, such as oiler, satin cloth, monofilament diameter, hard cylinder drawing and yarn withdrawal, on the quality of 62 glass fiber. What are the factors that affect the migration of starch size? Cooking technology, starch types, etc. 63. What are the adverse effects of powder wetting agent migration? Uneven tensile tension, broken ends, streaks during post-treatment, etc. 64. Precautionary measures to produce precursors in the post-treatment of starch slurry? Constant temperature and humidity. 65. How to improve the water resistance of SMC? Selection of sizing agent components. Why should we control the amount of lubricant in polypropylene filament sizing agent? Interface isolation and hairiness. How to ensure that PP filament reinforced thermoplastic particles do not change color at high temperature? Slurry material, coupling agent at special temperature, etc. 68. What problems will occur in the process of drawing textile yarns? How to solve it? Seersucker, flying silk, excessive lubrication. What are the common problems in spinning yarn withdrawal? How to solve it? How to improve the strength of textile yarn? 7 1. What are the precautions when winding yarn? Peeling, inner ring, etc. 72. What are the effects of tension during winding? Hair, yarn tension, etc. 73. What are the effects of winding speed? Detection and serious friction of 6 kinds of glass fibers such as wool, 74. What indicators should be tested in the test of SMC yarn? What is the effect of each index in use? Oil content, water content, hardness, permeability, etc. 75. What indicators do air-jet yarns need to be tested? What is the effect of each index in use? Oil content, water content, hardness, permeability, etc. 76. What indicators should be tested when testing chopped yarn? What is the effect of each index in use? Drawing, shredding, graininess, etc. 77. What are the precautions in the production of pultrusion yarn? What is the intuitive criterion for judging its quality? Drawing, yarn withdrawal, packaging, wool, etc. 78. What are the performance indexes of winding yarn? How to detect? Oil content, water content, permeability, mechanical properties of products, hairiness, etc. 79. What are the test properties of textile yarns? Seven different formulas, such as oil content, water content, twist, count and monofilament strength, all need drying technology. 80. What is the difference between intermittent furnace and tunnel furnace drying? Temperature uniformity, drying continuity, etc. 8 1. What is the optimum temperature for winding and drying? Curve drying, dehumidification, etc. 82. What is the effect of drying process on the film formation and quality of winding yarn size? Migration, soaking effect, etc. 83. What is the best drying temperature of SMC yarn? Curve drying, dehumidification, film formation, etc. 84. What is the effect of drying process on the film formation and quality of yarn size for SMC? Unable to form film, insufficient crosslinking, etc. 85. What is the best drying temperature of spraying yarn? Curve drying, dehumidification, film formation, etc. 86. What is the effect of drying process on the film formation and quality of yarn sizing agent for spraying? Poor film forming, soaking effect, etc. 87. What is the optimum temperature for chopped strand mat drying yarn? What are the advantages of microwave drying? Curve drying, dehumidification, etc. 88. What is the effect of drying process on the film formation and quality of yarn size for felt? Poor film forming, soaking effect, etc. 89. What is the optimum temperature for drying chopped yarn? Curve drying, dehumidification, film formation, etc. 90. Why do chopped yarns need to be dried twice in the production process? How to bake to achieve the best effect? The process of shortcut keeps granular 9 1. Why is there a difference when the same yarn is dried in the same drying room? Yellow, uneven temperature, etc. 92. What are the advantages and disadvantages of microwave drying? No local heating, rapid evaporation of water, non-adjustable temperature, poor film-forming property, etc. 8. The influence of glass fiber quality on FRP products. Why do you want to know the related properties and processing technology of basic resin? Orientation adjustment formula 94. What is the effect of the combination of soft and hard winding yarn on the use? Production and use are smooth. 95. Is the monofilament strength of yarn as high as possible? The higher the performance of FRP products? According to the requirements, the performance of corresponding products, etc. 96. Why do users still have problems when using air-jet yarn after all the indicators such as testing are qualified? Injection process, resin content, etc. 97. Why do users still have problems when using chopped felt yarn after all the indicators such as testing are qualified? Electrostatic size, chopping performance, dispersion, etc. 98. What are the technical requirements of glass fiber yarn (PP filament for short) for reinforcing thermoplastics? Easy to break, less wool, high temperature resistance, mechanical properties, etc. 99. Why do PP filaments keep a certain length when they break in twin-screw extruder? The product is firm, impact-resistant and easy to agglomerate. How to ensure the good combination of PP filament and thermoplastic? Composition of wetting agent, selection of coupling agent, etc.