Study On Anti-hairfalling Property Of Wound Care Plush Material

Wound care plush material is non-toxic and has good water absorption, flexibility and dimensional stability. It not only removes foreign bodies and necrotic tissues within the wound, but also greatly reduces pain in patients during application. However, due to material structures, fibers in front side of the material are easily contaminated with blood or necrotic tissue during application, which leads to hairfalling. The fallen fibers left in the wound increase the risk of infection. Thus the anti-hairfalling properties of the wound care plush material becomes a key factor whether the material can be put into application. Current researches on the wound care plush material focused on the clinical application and some conventional mechanical properties. There is no research on the anti-hairfalling properties of this material. Therefore, this paper systematically explored the relationship between structural parameters and anti-hairfalling properties of the plush material, which will have some significance for the industrial production.The paper selected polyacrylate adhesive as the coating agent of the wound care plush material. The physical, chemical and biological properties of the adhesive were also tested. Test results show that the polyacrylate adhesive has good film-forming ability, mechanical stability, storage stability, and a good biocompatibility. Thus it can be used to coat the plush material. The film-forming results show that the film formed at a temperature of 120℃ has a good shape, and the forming time is relatively short. So the heating temperature was set at 120℃.Then, the paper discussed the characterization methods of anti-hairfalling properties of the wound care plush material. Firstly, pilling tester was used to directly simulate the hairfalling performance. Experimental parameters were explored. Then, fiber withdraw method was used as an indirect test. The results show that when the friction pressure is constant, the amount of hairfalling slightly increased with the incensement of friction number. When the friction number reached 20 times, hairfalling did not increase obviously. When a certain number of friction was settled, hairfalling amount increased with the increases of frictional pressure. In this study, friction time was set as 20, friction pressure was set as 490 cN. Withdraw force can indirectly characterize the anti-hairfalling properties of wound care plush material, the greater the withdraw force, the better the anti-hairfalling performance.Afterwards, the effects of structural parameters on the anti-hairfalling properties of the wound care plush material was explored. Materials with different densities and yarns were selected, and the unit mass, pile mass and yarn mass were measured, together with the cover opacity and porosity. The relationship of these indicators and the anti-hairfalling properties were also explored. Results show that higher fiber density and yarn number gave a better anti-hairfalling properties. In addition, we studied the influence of coating process on anti-hairfalling properties of the wound care plush material. Different coating amounts and technologies were performed on one sample. The mass and number of losing fiber and pulling force were selected as indicators. Results show that anti-hairfalling properties of the material improved with the increase of coating amount for the same coating method. Roller coating technology was more appropriate compared to spraying. When the coating amount reaches 0.8 g/100 cm2 using roller coating method, the material already has a good anti-hairfalling properties.Finally, a comprehensive analysis was carried out to investigate the influence of the structural parameters and the coating process on the anti-hairfalling properties of the wound care plush material. Roller coating treatment were performed on samples with different structural parameters. Results shows that coating treatment was the main factor that affect the anti-hairfalling properties of the wound care plush material.In summary, the coating process have a much greater influence on the anti-hairfalling properties of the wound care plush material compared to structural parameters. By optimizing the process parameters, it is possible to obtain a wound care plush material with excellent anti-hairfalling properties, which can be applied in the industrial production.