How does the woven coating process improve the liquid barrier performance of medical coveralls?

In the field of medical protection, the blue disposable coveralls made of 210T woven coating protective materials have become an important barrier for infection control in clinical environments due to their efficient barrier capabilities against pollutants such as body fluids and blood. The realization of this core performance is due to the systematic construction of the fabric surface barrier by the woven coating process - through the precise coating and structural optimization of medical-grade coating materials, while ensuring safety, it creates an all-weather liquid protection barrier for medical staff.

The requirements for protective materials in medical scenarios far exceed those in ordinary industrial scenarios: not only do they need to resist the penetration of pathogen-containing liquids such as blood and body fluids, but they also need to meet special standards such as biocompatibility, non-toxicity and disinfection resistance. The polyurethane (PU) coating selected for the 210T woven coating protective material has reached medical-grade standards after special modification. Its molecular structure does not contain harmful components such as plasticizers and has passed the ISO 10993 biocompatibility test to avoid irritation to the skin or allergic reactions. The density and molecular spacing of this coating material are precisely controlled to effectively block liquid particles with a diameter of ≥0.22μm - this is the key interception size for blood-borne pathogens (such as HIV and HBV) in clinical protection.

On the surface of the 210T base fabric woven with polyester filaments, the coating process forms a composite barrier through the three-step method of "infiltration-crosslinking-film formation": first, the liquid coating material uses nano-emulsion technology to evenly penetrate into the gaps between fabric fibers to fill the micropores of the original fabric of about 5-10μm; then, an elastic film with a thickness of about 3-5μm is formed on the fiber surface through a thermal crosslinking reaction. The film forms a chemical bond with the base fabric fibers, rather than a simple physical attachment, to ensure that the integrity of the film layer is maintained during dynamic movements such as stretching and folding; the final composite structure presents a dual-effect protection system of "base fabric skeleton support + coating film sealing", which increases the liquid permeability of the fabric from 500mm water column of ordinary base fabric to ≥1600mm water column required by medical standards (refer to AAMI PB70 protection level).

In clinical operations, the body movements of medical staff will cause continuous stretching and wrinkling of the fabric, and ordinary coating materials are prone to microcracks due to stress concentration, resulting in protection failure. The uniqueness of the 210T woven coating material lies in the "strain self-adaptation" ability of the coating: the elastomer component introduced into the PU coating makes its elongation at break reach more than 300%, which matches the 150% elongation at break of the base fabric, ensuring that the coating film layer deforms synchronously with the fabric without breaking during actions such as joint bending and arm raising. This dynamic compatibility is particularly important in high-frequency action scenes such as emergency rescue and surgical operations - for example, when medical staff perform cardiopulmonary resuscitation, the coating in the easily stretched areas such as the armpits and elbows of the jumpsuit can still maintain complete liquid barrier properties, avoiding protection loopholes caused by large movements.

In addition to the direct liquid barrier function, the woven coating process also gives medical coveralls multiple hidden protective advantages: the coating surface is treated with antistatic treatment to reduce dust particle adsorption and cross-contamination risks; the membrane structure is dense, which can block the penetration of common disinfectants such as alcohol and chlorine-containing disinfectants, and extend the service life of protective clothing during cleaning and disinfection; the coating material itself does not absorb moisture, avoiding the weight increase and microbial breeding problems caused by liquid absorption of ordinary fabrics - wet fabrics are easy to become a breeding ground for bacteria, and the hydrophobic surface of the 210T woven coating coverall allows liquids to slide off quickly, and with the breathable microporous design of the base fabric (pore size ≤1μm, only water vapor is allowed to pass), it achieves two-way protection of "preventing liquid intrusion from the outside and discharging humid and hot gases from the inside", improving the comfort and safety of long-term wear.

Under the stringent standards for medical protective equipment, the performance of the 210T woven coated protective material has passed a number of authoritative certifications: its liquid barrier performance meets the highest protection level of AAMI PB70 Level 4, and is suitable for surgery and high-risk infection control scenarios; mechanical performance indicators such as breaking strength and tear strength meet the ASTM F1670/F1671 standards, ensuring that it is not easily damaged during donning and doffing; and the coating material's washing resistance (simulated medical disinfection washing 50 times) and aging resistance (UV irradiation 200 hours) test results both prove its stability in the medical waste treatment process - for disposable products, this means full-cycle protection reliability from wearing to disposal.