ABSORBABLE PROTECTIVE COATINGS FOR WOUND WITH THE USE OF CELLULOSE SPONGE AND PROCESS FOR PRODUCING THE SAME
申请人:Hogy Medical Co., Ltd.
公开号:EP1269951A1
公开(公告)日:2003-01-02
The object is to provide an absorptive wound covering protecting material and a method for preparing the same which is quite excellent in an absorptiveness and a liquid-holding property, and is superior in shape-maintaining ability and strength, and wherein a reinforcement can be used and workability is improved, as well as a hemostatic wound healing effect can be enhanced, compared to an absorptive wound covering protecting material comprising a thinly solidified cellulose sponge.
A method for preparing an absorptive wound covering protecting material is characterized by solidifying a sponge raw solution containing no reinforcement that is obtained by mixing viscose and crystalline mirabilite as main raw materials, or a sponge raw solution obtained by mixing viscose containing a reinforcement comprising natural fibers having a length of at least 5 mm to 40 mm, and crystalline mirabilite as main raw materials, by performing a heat treatment on the sponge raw solution, and then forming the solidified cellulose sponge in a thickness somewhat greater than a desired thickness, and then forming the cellulose sponge in a sheet form having a desired thickness by compressing the cellulose sponge, and, if required, carboxymethylating hydroxyl groups in a glucose unit constituting a cellulose sponge so that a degree of substitution of the hydroxyl groups is from 0.5 to less than 1.0, and then, forming an incision the cellulose sponge.
本发明的目的是提供一种吸收性伤口覆盖保护材料及其制备方法,与由薄固化纤维素海绵组成的吸收性伤口覆盖保护材料相比,该材料具有相当优异的吸收性和持液性,并且在保持形状的能力和强度方面也更胜一筹,而且可以使用增强剂,提高了可加工性,并增强了止血伤口愈合效果。
一种用于制备吸收性伤口覆盖保护材料的方法,其特征在于将不含增强剂的海绵原液凝固,该原液是由粘胶和结晶海泡石作为主要原料混合而成,或者是由粘胶和结晶海泡石作为主要原料混合而成,该粘胶含有增强剂,增强剂包括长度至少为 5 毫米至 40 毫米的天然纤维、对海绵原液进行热处理,然后使凝固的海绵纤维素的厚度略大于所需的厚度,然后通过压缩海绵纤维素使其形成具有所需厚度的片状,如有必要,对构成海绵纤维素的葡萄糖单元中的羟基进行羧甲基化,使羟基的取代度为 0.5 至小于 1.0,然后在纤维素海绵上形成切口。