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Listening Quiz: Lời Khuyên Về Vải Không Dệt Melt-Blown Cho Lọc – Advanced Level
Th4 21, 2025
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bởi
Anna Phạm
trong
Tiếng Anh dành cho Kỹ sư dệt may (English for Textile Engineer)
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1.
What is the main topic of the conversation?
The history of medical masks in hospitals
The advantages and limitations of melt-blown nonwoven for filtration
How to manufacture spunbond fabric for industrial use
The cost of particle counters and airflow meters
Explanation:
The conversation focuses on melt-blown nonwoven material, especially its filtration performance, strengths, limits, and testing.
2.
According to Emily, what does melt-blown nonwoven have that helps it trap small particles well?
Extra stretchability
Large open pores
Very fine fibers
A thick waterproof coating
Explanation:
Emily says melt-blown nonwoven has very fine fibers, which helps it trap small particles well.
3.
What does Emily say about spunbond materials compared with melt-blown nonwoven?
Spunbond and melt-blown have the same filtration performance
Spunbond is only used in masks, not filtration
Spunbond is stronger but less effective at filtering tiny particles
Spunbond filters tiny particles better but is weaker
Explanation:
Emily directly states that spunbond is stronger but less effective in filtering tiny particles.
4.
Why does Emily say proper design is important when using melt-blown nonwoven?
To eliminate the need for testing equipment
To increase the thickness as much as possible
To make the material completely waterproof
To balance filtration performance and airflow
Explanation:
Emily explains that melt-blown can block air too much, so proper design balances filtration and airflow.
5.
How do Emily and Paul say they test filtration performance?
With particle counters and airflow meters
By checking the color of the fabric
By stretching the material until it tears
By washing the material in hot water
Explanation:
Emily says they use particle counters and airflow meters for testing filtration performance.
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