Which statement about Tyvek's grain is correct?

Which statement about Tyvek's grain is correct?

• A. Does not have grain
• B. Has grain
• C. Is woven
• D. Is knit

Answer: (A)

Tyvek is a nonwoven material made from high-density polyethylene fibers that are bonded together rather than woven. In fabrics, the term grain comes from warp and weft threads creating a defined directional orientation. Since Tyvek isn’t woven, there’s no warp/weft structure and no fixed grain direction. Some production processes can introduce a slight machine-direction bias in the fiber layout, which might influence properties along a particular path, but that isn’t a true textile grain. Therefore, the correct statement is that Tyvek does not have grain.

Tyvek is a nonwoven material made from high-density polyethylene fibers that are bonded together rather than woven. In fabrics, the term grain comes from warp and weft threads creating a defined directional orientation. Since Tyvek isn’t woven, there’s no warp/weft structure and no fixed grain direction. Some production processes can introduce a slight machine-direction bias in the fiber layout, which might influence properties along a particular path, but that isn’t a true textile grain. Therefore, the correct statement is that Tyvek does not have grain.