Which term describes the flow of a hazardous material through fabric defects such as seams or pinholes?

Which term describes the flow of a hazardous material through fabric defects such as seams or pinholes?

• A. Permeation
• B. Penetration
• C. Degradation
• D. Absorption

Answer: (B)

Penetration is the flow of a hazardous material through fabric defects such as seams or pinholes. These defects create direct passages that allow liquid or vapor to bypass the intact barrier, so the material can move through the fabric by physical travel through openings rather than diffusing through the fabric itself. This differs from permeation, which is the movement of a chemical through the intact material at the molecular level—through the fibers and pores over time—without relying on any openings. Degradation refers to chemical damage that weakens or breaks down the material itself, not the path the chemical takes. Absorption involves the material taking up the chemical on its surface or within its bulk, not specifically moving through defects. So the correct term for flow through seams or pinholes is penetration.

Penetration is the flow of a hazardous material through fabric defects such as seams or pinholes. These defects create direct passages that allow liquid or vapor to bypass the intact barrier, so the material can move through the fabric by physical travel through openings rather than diffusing through the fabric itself. This differs from permeation, which is the movement of a chemical through the intact material at the molecular level—through the fibers and pores over time—without relying on any openings. Degradation refers to chemical damage that weakens or breaks down the material itself, not the path the chemical takes. Absorption involves the material taking up the chemical on its surface or within its bulk, not specifically moving through defects. So the correct term for flow through seams or pinholes is penetration.