1. Appearance. Tylenol Fengbaotai nylon thermal insulation strip is black and matte. Usually, every 6 ~ 8 cm, the strip body is marked with the laser code of TechnoformBAUTEC trademark, product specification, production batch number, etc., and the whole strip is smooth and flat, without shrinkage, looseness, scratches and mold extrusion marks. On closer inspection, the unique luster of minerals (glass fiber distribution) can be seen, and there is no parting line mark on the head end face of the thermal insulation strip. Other imported or domestic nylon heat insulation strips are gray-black or dark-black, without any trademark logo, and the strips are relatively rough, with obvious mold extrusion marks and parting line marks on the head end face, and some shrinkage holes are loose; The PVC insulation strip is bright black, without any trademark logo, with rough body, obvious extrusion marks of the mold, a large number of shrinkage cavities, asymmetric and irregular head size.
2. Breaking experiment. Taking a 25cm sample of I-type specification for manual breaking experiment, Tylenol-Baotai nylon thermal insulation strip can feel good toughness and strength when it is bent, and it will not break even if the two ends are close together, even if the fracture is slow. Other imported or domestic nylon thermal insulation strips are either obviously brittle, and when they are bent to a certain distance at both ends, multi-stage bursting occurs (caused by uneven glass fiber particles), or obviously tough, and they are repeatedly bent for many times (caused by insufficient glass fiber content); PVC insulation strip is very soft, basically without strength, and will not break after repeated bending.
3. Ordinary ignition experiment. Nylon insulation strip is not easy to ignite, and it is light yellow flame when burning, while PVC insulation strip is flammable, and it is blue flame when burning, and it releases a lot of pungent black smoke.
4. Complete combustion experiment at high temperature. Uniform black fiber deposition can be seen after Tylenol-Baotai nylon thermal insulation strip is completely burned at high temperature. Other imported or domestic nylon thermal insulation strips either have uneven fiber deposits or burn completely at high temperature, and basically have no fiber deposits; There is no deposit after the PVC insulation strip is completely burned at high temperature.
5. Overall dimension accuracy. Using vernier caliper (micrometer is more accurate) to detect the dimensional accuracy of the shape accuracy of the insulation strip, it can be found that the dimensional deviation of Tylenol Baotai nylon insulation strip in different batches or different parts of the same insulation strip is less than .1mm, and the parallelism is standard; The dimensional deviation of different batches of other domestic nylon or PVC insulation strips or different parts of the same insulation strip is at least above .1mm, and the parallelism of the upper and lower ends of the insulation strip is poor, which can not guarantee the stability of the composite strip, and it is easy to cause internal torsional stress, thus forming the quality hidden danger that the insulated doors and windows processed by this kind of insulation profiles are easy to deform.