The Effect of Polyquinone and Phenol-Phosphite Stabilizer on the Resistance of Polypropylene to Ionizing Radiation

Khakimullin

2021

KEM

Self Cite

Radiation sterilization is widely used to sterilize nonwoven SMS medical products. SMS materials have improved filtering and barrier properties, low bacteriopermeability and, due to these properties, are indispensable for medicine. They are used to make such important health care products as disposable surgical clothing and underwear. As a result of the research carried out, the effect of gamma and electron radiation, in the range of absorbed doses from 15 to 25 kGy, on the strength characteristics of nonwoven SMS materials based on polypropylene with a surface density of 35, 40, 50 g/cm2 was studied. It has been established that the strength characteristics (tensile strength, tensile strength, and tear strength) of nonwoven materials decrease after exposure to ionizing radiation. The higher the density of the material, the more its characteristics decrease after radiation sterilization. It was also found that gamma radiation, due to its nature, has a stronger effect on nonwoven materials based on polypropylene, and leads to a stronger decrease in strength characteristics. In general, for products sterilized by ionizing radiation and made from SMS materials, it is important to control the strength characteristics, primarily, the tensile strength in the transverse direction of the web stuff.

Section: Resultsmentioning

confidence: 99%

Influence of Gamma and Electron Radiation on the Strength Characteristics of Nonwoven SMS Materials Based on Polypropylene

Khakimullin

2021

KEM

Self Cite

“…Such materials are made from the most affordable polymer -polypropylene. Despite all the advantages (high strength characteristics, lintfree structure, non-toxicity, anti-static) non-woven spanmelt materials based on polypropylene, have low resistance to radiation sterilization [11][12][13][14][15][16], which is one of the main industrial methods of sterilization of medical devices. Ionizing radiation leads to a decrease in the strength characteristics of non-woven materials based on polypropylene and then products from such materials cease to meet the requirements that apply to them.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Radiation Sterilization on the Stress-Strain Properties of Non-Woven Materials -Based on Polypropylene

Rakhmatullina

et al. 2020

MSF

Self Cite

Non-woven materials are widely used for the manufacture of disposable medical clothing and underwear. Radiation is widely used to sterilize single-use medical devices. The paper analyzes the effect of ionizing radiation at absorbed doses of 0-60 kGy on the stress-strain properties of medical non-woven spanmelt material based on polypropylene obtained by blow-molding technology. It has been established that ionizing radiation significantly reduces the breaking load and elongation in the machine and cross directions of the web. For this type of material, the most critical is the decrease in strength in the cross direction of the web, primarily because the level of strength in the cross direction of spanmelt materials is generally low. Sterilization by ionizing radiation further reduces strength and leads to the fact that non-woven materials irradiated with an absorbed dose of 50-60 kGy are close to unacceptable values in accordance with the requirements of EN 13975-2011.

“…Such materials are made from the most affordable polymer -polypropylene. Despite all the advantages (high strength characteristics, lint-free structure, nontoxicity, antistaticity) melt nonwovens based on polypropylene have low resistance to radiation sterilization [9][10][11]. Sterilization by ionizing radiation, as you know, is one of the main industrial methods of sterilization of medical devices.…”

Section: Introductionmentioning

confidence: 99%

Medical Nonwovens: Effects of Radiation Sterilization on Bursting Strength

Rakhmatullina

et al. 2020

KEM

Self Cite

The production of nonwovens over the past few years remains one of the most promising areas in the textile industry. This is due to the short cycle of production of such materials from raw materials to finished products and the ability to produce at a low cost a wide range of materials for both household and technical use. In particular, non-woven materials are widely used for the manufacture of disposable medical clothing and underwear. An important characteristic for surgical clothing is an indicator of bursting strength. This study simulates material deformation similar to elbow pressure when bending the arms or knee when bending the legs. Since the lower part of the sleeve of the product refers to the critical zone of the product, i.e. to the zone most likely to be involved in the transfer of infectious pathogens to or from the wound, the sterile product must have a significant margin of bursting strength. The effect of the absorbed dose of electronic radiation on the strength during the bursting strength of nonwoven medical material of SMS design with a surface density of 35 and 50 g/m2 obtained using the spanmelt technology was studied. It is shown that electronic radiation significantly reduces the resistance of the nonwoven to bursting strength. With an absorbed dose of 40 kGy, the material no longer meets the requirements for surgical clothing and linen by regulatory documents. For non-woven materials obtained using spanmelt technology, the bursting strength rate is even more sensitive to the action of ionizing radiation than the tensile tensile load, therefore, this indicator is recommended to be used as a characteristic indicator of radiation resistance.