plasticnewsПластические массыPlasticheskie massy0554-2901PLASTMASSY Publishing House (Moscow)10.35164/0554-2901-2024-06-19-22plasticnews-1059Research ArticleСТРУКТУРА И СВОЙСТВАSTRUCTURE AND PROPERTIESВлияние режимов пропитки на пористую структуру композиционных материалов с волокнистым наполнителем из полипропиленовых волоконInfluence of impregnation modes on the porous structure of composite materials with fibrous filler made of polypropylene fibersАсметковИ. Д.AsmetkovI. D.

Москва

Moscow

ГодинН. И.GodinN. I.

Москва

Moscow

ДедовА. В.DedovA. V.

Москва

Moscow

dedovs55@rambler.ruРоссийский государственный университет имени А.Н. КосыгинаРоссияRussian State University named after A.N. KosyginRussian FederationМосковский политехнический университетРоссияMoscow Polytechnic UniversityRussian Federation202413012025061922Copyright © Асметков И.Д., Годин Н.И., Дедов А.В., 20252025Асметков И.Д., Годин Н.И., Дедов А.В.Asmetkov I.D., Godin N.I., Dedov A.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.plastics-news.ru/jour/article/view/1059

Для оценки пористой структуры композиционных материалов, полученных пропиткой нетканого иглопробивного полотна из полипропиленовых волокон с линейной плотностью 0,66 водной дисперсией полиуретана, использовали степень пропитки полотна и плотность композиционных материалов. Исследована зависимость степени пропитки от зазора между отжимными валами и концентрации полиуретана в водной дисперсии. При концентрации полиуретана в водной дисперсии ниже 15 масс.% и зазоре между отжимными валами меньше 1 мм степень пропитки не превышает 0,3. Для оценки изменения объема волокнистого наполнителя в процессе термообработки пропитанного полотна использовали соотношение между степенью пропитки и плотностью композиционных материалов. Установлено, что при плотности полотна 117 кг/м3 термообработка пропитанного полотна происходит без изменения объема волокнистого наполнителя. При использовании для армирования композиционных материалов полотна плотностью 80 кг/м3 объем волокнистого наполнителя в процессе термообработки уменьшается.

The degree of impregnation of the fabric and the density of the composite materials were used to evaluate the porous structure of the composite materials obtained by impregnating a nonwoven needle-punched fabric made of polypropylene fibers with a linear density of 0.66 with an aqueous dispersion of polyurethane. The dependence of the degree of impregnation on the gap between the squeezing rollers and the concentration of polyurethane in the aqueous dispersion was investigated. When the concentration of polyurethane in the aqueous dispersion is below 15 wt.% and the gap between the squeezing rollers is less than 1 mm, the degree of impregnation does not exceed 0.3. To assess the change in the volume of fibrous filler during the heat treatment of the impregnated fabric, the relationship between the degree of impregnation and the density of composite materials was used. It was found that at the density of the fabric 117 kg/m3 the heat treatment of the impregnated fabric occurs without changing the volume of the fiber filler. When using a fabric with a density of 80 kg/m3 for reinforcing composite materials, the volume of fibrous filler.

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The authors declare that there are no conflicts of interest present.