PS ZERO® and PS5®: the most advanced textile solutions for protection against perforation PS ZERO® and PS5® are the solutions offered by L-Protection® for top performance textile insoles. Not only do they comply with the new requirement of zero perforation at 1,100 N, but they also withstand a complete rupture at forces exceeding 2,000 N. PS ZERO® and PS5® are made with AT LEAST FIVE layers of tough fabric, pre-coated with resins silicate-containing Why at least FIVE layers of fabric? Because the superimposing of more layers of highly resistant fabric renders the material extremely homogenous, thereby drastically reducing the chances of pressure loss over the entire surface of the material - something that can, by contrast, occur in the case of just two or three layers. The choice of appropriate coating resins gives the final composite flexibility and softness otherwise difficult to attain. Why MUST the “PS” series fabrics be coated with silicate micro-powder? Because pre-coating of the various layers of fabric with polyurethane resin makes the fibres within extremely cohesive, which in turn ensures resistance to perforation even during prolonged use. At the same time, it eliminates the problematic fringe effect of “loose threads” that inadequately linked fibres, especially in too chunky fabrics, cause in cutting and sewing. The silicate micro-powder facilitates the obstructing of spaces within the body of the fabric and slackens accidental perforation by sharp objects. This reduces the final thickness of the insoles to levels difficult to reach by other textile composites. It is these processes of coating with silicate micro-powder, protected by patent applications, that make the L-Protection® an unique material. THE IMPORTANCE OF “MAXIMUM PEAK FORCE” RESISTANCE The upcoming norms, and in particular the new EN 12568:10 currently pending approval, require that textile materials for insoles be resistant to at least 1,100 N without a sign of perforation on the opposite side. PS ZERO® and PS5® fulfil these requirements. However, the experience gained by Lenzi Egisto since inventing and introducing the perforation-proof textile insoles that revolutionised the sector of safety footwear, shows that potential accidents take place when the sole becomes perforated and a nail, or another pointed object, penetrates the sole after its final rupture. This phenomenon is measured by evaluating the “maximum peak force”. Indeed, it is for this reason that certificates in North American countries, such as the CSA Z 195-02 in Canada, require the “maximum peak of force perforation” value, fixing the safe limit at 1200N. It is important that the “maximum peak of force” should be as high as possible in order to avoid accidental perforation in the real work environment. The high value of the maximum peak force, exceeding 2,000 N for PS ZERO® and PS5® products, is a guarantee of unparalleled safety. This property is also shown by the high value obtained by measuring the force needed for an ordinary carpenter’s nail to penetrate these materials.