PVA Sponge introduction

03 . Nov . 2022

Polyvinyl alcohol medical grade microporous sponge is a kind of polymer material with absorbent performance and extremely soft surface when contacting with human body, which can be completely naturally degraded. Its suction performance is not only in the faster suction rate, but also reflected in its super suction ratio. Under normal circumstances, one gram of PAV sponge can absorb more than seven times its own body fluid. Therefore, this kind of material is widely used in modern surgical operation to replace the absorbent cotton and defatted gauze, and is widely used in international clinical surgery.

Polyvinyl alcohol medical-grade macroporous sponge suction fluid has performance, high opening rate, high strength, and extremely soft surface when in contact with the human body. It is widely used in clinical trauma surgery, especially in the field of negative pressure drainage. Waste macroporous sponges can be completely naturally degraded and will not cause pollution problems to the environment. In general, one gram of PAV macroporous sponge without excipients can absorb more than nine times its body fluid. This kind of material is used to replace the absorbent cotton and the absorbent gauze in the surgical operation, which can solve the problem that the absorbent cotton or the absorbent gauze needs to be replaced constantly in the clinical operation.

Medical polyvinyl alcohol sponge is made of polyvinyl alcohol molecular chain cured by cross-linking agent, without fiber filament or fiber head, and there will be no fiber falling off in use. During eye surgery, ear, nose and throat surgery, brain neurosurgery craniotomy and thoracic surgery heart surgery, it does not affect wound healing due to fiber shedding. According to different clinical uses, if appropriate excipients are loaded into the sponge, it can also promote wound healing. At the same time, the sponge has good mechanical properties and can be processed into various shapes according to different surgical needs. A blood-sucking sponge or sponge rod in the shape of a spear used especially in microsurgery, which can quickly absorb microscopic bleeding and ensure the operation is correct.

Fold edit this section method

There are mainly physical foaming method, chemical foaming hair and physical and chemical combination of foaming method three methods. But at present, the production technology of PVA sponge absorbent material ly adopts the backward starch filling foaming method. That is, the starch is filled into the PVA solution at the appropriate temperature, and then the starch is washed off after the PVA is cross-linked and solidified at a certain temperature. When this method is used in production, the environment pollution is serious, the follow-up treatment process is long, the starch can not be completely cleaned, and the starch and acid catalyst can not be fully recycled, which is not conducive to saving resources and cutting costs.

Fold edit this section production technique

There are mainly physical foaming hair, chemical foaming hair and physical and chemical combination of foaming method of three methods. But at present, the production technology of PVA sponge absorbent material ly adopts the backward starch filling foaming method. That is, the starch is filled into the PVA solution at the appropriate temperature, and then the starch is washed off after the PVA is cross-linked and solidified at a certain temperature. When this method is used in production, the environment pollution is serious, the follow-up treatment process is long, the starch can not be completely cleaned, and the starch and acid catalyst can not be fully recycled, which is not conducive to saving resources and cutting costs.

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