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Application Of Infiltrant In Glass Fiber And 100 Points For Attention In Glass Fiber Production Process

Jun 09, 2020

1. General knowledge of infiltrant

1. Classification of glass fiber products?


Yarn, cloth, felt, etc.


2. Common classification and use of FRP products?


Hand lay-up, mechanical molding, etc.


3. How does the infiltrant work?


Interface binding theory


4. What is the classification of infiltrant?


Enhanced type, enhanced textile type, etc.


5. What are the types of enhanced infiltration agents?


Winding, pultrusion, SMC, spraying, etc.


6. What is the difference between the sizing agent and the production and product of glass fiber?


Yarn classification, requirements, differences, grades, etc.


7. What are the general composition of the infiltrant?


Main film-forming agent, auxiliary film-forming agent, lubricant, antistatic agent, etc.


8. What are the infiltrant film-forming agents. What are the characteristics of each?


Polyester resin, epoxy, PU, PVAC, acrylate, etc.


9. What is the role of different formulations?


Film formation, stiffness, penetration, etc.


10. Why do different manufacturers' infusion formulations differ?


Process, climate, etc.


11. Which component adjustments in the infiltrant formulation will not affect the basic properties of the yarn and are adjustable?


Lubricants, antistatic agents, auxiliary film-forming agents, etc.


12. What is the difference between different lubricant components in the formulation?


Dry lubrication, wet lubrication, etc.


13. What is the role of the coupling agent in the glass fiber production process? What is the difference between different coupling agents?


Interface bonding, different reinforcing substrate resins, etc.


14. What is the difference between hard yarn and soft yarn? How to classify?


Stiffness, monofilament diameter, etc.


15. Why are the production conditions of medium alkali yarn different in different climates?


Moisture absorption, climate, etc.


16. What is the difference between pultruded profiles and tubes, and what are the requirements for yarn performance?


Strength, toughness, etc.


17. What are the types of wetting agents for textile yarns?


Paraffin type, 711, 811, starch type, etc.


18. What types of modified starch? What are the characteristics of each?


Esterification, etherification, etc.


19. What are the components of textile infiltrant? What is the role?


Film-forming agent, plasticizer, lubricant, etc.


20. What are the main film forming agents of enhanced textile yarn infiltrant? What are the characteristics of each?


Epoxy, PU, polyester, PVAC, acrylate, etc.


twenty one. What are the characteristics of different wetting agents for textile yarns?


Preparation of paraffin, preparation of starch type, preparation of enhanced type, etc.


twenty two. How to choose the coupling agent in the reinforced textile yarn infiltrant? why?


Different reinforcing substrate resins, different types and effects of coupling agents, etc.


twenty three. What are the glass fiber infiltrant film forming agents for plastics?


Epoxy, PU, polyester, acrylic, etc.


twenty four. Why use bactericide in the infiltrant? What are the types?


Emulsifier, organotin, formalin


2. Questions and answers about the procurement, transportation and testing of infiltrant

25. What preparation and understanding is required before infiltrant purchase?


Variety, related cost budget, life cycle, supporting raw materials, etc.


26. Matters needing attention during transportation and storage?


Temperature, leakage, labels, etc.


27. What are the precautions for understanding, testing and using the required raw materials when purchasing the infiltrant?


The performance of raw materials, the role in the formulation of the sizing agent, the test indicators of the raw materials, the preparation process, the use of attention, etc.


28. Matters needing attention when purchasing coupling agent?


Purity, color, production date, packaging, etc.


3. Precautions for preparation of infiltrant

29. 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


31. Why does the hydrolyzed coupling agent fail? The best time to use?


Principle and time of hydrolysis


32. What should be paid attention to when preparing the infiltrant?


Dispersion of coupling agent, uniformity of raw materials, dosage of preparation, etc.


33. What is the difference between the kiln and unit kiln when preparing the infiltrant?


Batch preparation, fast circulation, uniformity, etc.


34. What is the difference between the recovery and circulation of infiltrant in the production process of pond kiln and unit kiln? What precautions?


Single and circulating pipeline, solid content, uniformity, etc.


35. If there are problems with the infiltrant, what will happen during the drawing process? How to judge? How to deal with it?


Flying wire, broken ends, excessive lubrication, etc.


36. Preparation and precautions of starch infiltrant?


Paste temperature, cooking, emulsification, use temperature, etc.


37. What indicators should be tested for the formulated infiltrant?


Solid content, PH value, etc.


4. What are the characteristics, requirements and common problems of different varieties of fiber in production?

38. What are the main types of chopped yarn?


PA, BMC, PVAC, etc.


39. What is the difference between the infiltrant of different types of chopped yarn?


Solid content, oil content, film forming agent, etc.


40. According to the use requirements, what are the main types of felt yarn?


Classification of stiffness, oil, felt, etc.


41. What is the difference between the wetting agent of the same kind of felt yarn?


Solid content, oil content, film forming agent, etc.


42. What are the main types of winding yarn?


Direct yarn, ply yarn, non-alkali, etc.


43. What are the different requirements for infiltrant for different winding yarns?


Solid content, oil content, film forming agent, etc.


44. What is the difference between the pond kiln and the unit kiln during the production of winding yarn?


Type, scale, production efficiency, etc.


45. What are the specific requirements of each section in the production process of winding yarn? What should I pay attention to?


Drawing, yarn withdrawal, packaging, etc.


46. What is the intuitive judgment standard for the quality of the winding yarn?


Drawing, yarn withdrawal, soaking speed, wool, etc.


47. What are the precautions in the production process of jet yarn? What are the intuitive judgment criteria for its quality?


Drawing, yarn withdrawal, soaking speed, stiffness, etc.


48. What are the precautions for SMC yarn in the production process? What are the intuitive judgment criteria for its quality?


Drawing, yarn withdrawal, penetration speed, stiffness, etc.


49. What are the precautions for yarn for felt cutting? What are the intuitive judgment criteria for its quality?


Drawing, yarn withdrawal, soaking speed, stiffness, etc.


50. What are the precautions for chopped yarn in the production process? What are the intuitive judgment criteria for its quality?


Brushed, chopped, granular, etc.


51. What is the difference between jet kiln production pool kiln and unit kiln?


Scale, production efficiency, stability, uniform beam splitting, etc.


52. What is the difference between the production pool kiln and unit kiln for SMC yarn?


Scale, production efficiency, stability, etc.


53. What is the difference between the production of felt yarn kiln and unit kiln?


Scale, production efficiency, stability, uniform beam splitting, etc.


54. What impact and correlation does the quality of chopped strand yarn have on the production of chopped strand felt?


Chopping process, flatness of felt surface, permeability of felt, etc.


55. Why does the winding yarn pultrusion yarn produce a looping phenomenon in production?


Yarn is soft, too much lubrication, etc.


56. What are the influencing factors of the phenomenon of de-looping of chopped felt yarn in the production process?


Drawing process, infiltrant formulation, etc.


57. Why does the SMC yarn have the difference between 400-hole drawing, no groove and two points? What is the impact?


Different product requirements


58. Why does the yarn in the unit kiln bend a lot during the production of SMC?


Drawing head diameter, paper tube drawing, shrinkage of infiltrant, etc.


59. Why do different yarn types differ in oil content?


Difference in drying, migration of sizing agent, etc.


60. What is the difference between reinforced epoxy and reinforced polyester winding yarn?


Difference of coupling agent, difference of substrate resin, etc.


61. What is the difference between the textile yarn production section and other glass fiber production sections?


Oiler, satin cloth, monofilament diameter, hard tube drawing, yarn withdrawal, etc.


5. The influence of infiltrant on the quality of glass fiber

62. What are the factors that affect the migration of starch infiltrant?


Cooking process, types of starch, etc.


63. What are the adverse effects of powder sizing agent migration?


Uneven tension, broken head, streaks during post-processing, etc.


64. Matters needing attention in the post-processing of raw silk produced by starch infiltrant?


Constant temperature, constant humidity, etc.


65. How to improve the water resistance of SMC?


Selection of wetting agent components


66. Why control the amount of lubricant in PP filament wetting agent?


Interface isolation, wool


67. How to ensure that PP filament reinforced thermoplastic pellets do not change color at high temperature?


Wetting agent material, special temperature coupling agent, etc.


68. What problems will occur in the drawing process of textile yarn? How to solve?


Seersucker, flying silk, excessive lubrication


69. What are the common problems of textile yarns when they merge? How to solve?


Head, hair, broken head, etc.


70. How to increase the strength of textile yarn?


Bunching, reducing friction coefficient, uniform tension, etc.


71. What are the precautions when winding?


Peeling, inner ring, etc.


72. What are the effects of tension during winding?


Wool, yarn tension, etc.


73. What are the effects of winding speed?


Hairline, rubbing, etc.


Sixth, the detection of glass fiber

74. What indicators should be tested when testing SMC yarn? What are the impacts of various indicators in use?


Oil, water, stiffness, penetration, etc.


75. What indicators should be tested during jet yarn testing? What are the impacts of various indicators in use?


Oil, water, stiffness, permeability, etc.


76. What indicators should be tested when testing chopped yarn? What are the impacts of various indicators in use?


Brushed, chopped, granular, etc.


77. What are the precautions during pultrusion? What are the intuitive judgment criteria for its quality?


Wire drawing, yarn withdrawal, packaging, wool, etc.


78. What are the performance indicators of winding yarn? How to detect?


Oil, water, permeability, mechanical properties of products, wool situation, etc.


79. What are the test properties of textile yarn?


Oil, water, twist, count, monofilament strength, etc.


Seven, different formulas require drying process

80. What is the difference between batch furnace and tunnel furnace drying?


Temperature uniformity, drying continuity, etc.


81. What is the optimal temperature for winding the yarn?


Curve drying, dehumidification, etc.


82. What effect does the drying process have on the film formation and quality of the yarn infiltrant for winding?


Migration, penetration effects, etc.


83. What is the best temperature for drying SMC yarn?


Curve drying, moisture removal, film formation, etc.


84. What effect does the drying process have on the film formation and quality of SMC yarn infiltrant?


No film formation, insufficient cross-linking, etc.


85. What is the optimal temperature for jet yarn drying?


Curve drying, moisture removal, film formation, etc.


86. What effect does the drying process have on the film formation and quality of the jet yarn wetting agent?


Poor film formation, penetration effects, etc.


87. What is the best temperature for drying chopped felt yarn? What are the benefits of microwave drying?


Curve drying, dehumidification, etc.


88. What effect does the drying process have on the film formation and quality of the yarn wetting agent for felt?


Poor film formation, penetration effects, etc.


89. What is the optimal temperature for drying chopped yarn?


Curve drying, moisture removal, film formation, etc.


90. Why should the chopped yarn be dried twice in the production process? How to bake to achieve the best results?


The chopping process maintains granularity


91. Why are there differences when the same yarn is dried in the same drying room?


Yellowing, uneven temperature, etc.


92. The advantages and disadvantages of microwave drying?


No local heating, fast water evaporation, non-adjustable temperature, poor film formation, etc.


8. The influence of glass fiber quality on glass fiber reinforced plastic products

93. Why should we understand the properties and processing technology of base resin?


Targeted adjustment formula


94. What effect does the softness and rigidity of the winding yarn after plying have on its use?


Smooth production and use


95. The higher the monofilament strength of the yarn is, the better? The higher the performance of glass steel products?


According to requirements, performance of corresponding products, etc.


96. Why does the user have problems when using the jet yarn after the tests and other indicators are qualified?


Spraying process, resin content, etc.


97. Why does the user have problems when using the chopped felt yarn after the tests and other indicators are qualified?


Static electricity size, short cut performance is good or bad, scattered, etc.


98. What are the technical requirements for glass fiber yarn (PP filament for short) for reinforced thermoplastics?


Easy to twist, less wool, high temperature resistance, mechanical properties, etc.


99. Why do PP filaments maintain a certain length when twisted in a twin-screw extruder?


Product strength, impact resistance, easy formation


100. How to ensure a good combination of PP filament and thermoplastic?


Wetting agent components, coupling agent selection, etc.


Sourceļ¼šwww.up-resin.com

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