Micromechanics of Retention: The Influence of Polymer Chemistry, Natural Moisture, Capsule Placement Angle, and Twist Parameters on Capsule Retention (InvisiCaps Method)

Kateryna Yuzvyshena

Citation: Kateryna Yuzvyshena, "Micromechanics of Retention: The Influence of Polymer Chemistry, Natural Moisture, Capsule Placement Angle, and Twist Parameters on Capsule Retention (InvisiCaps Method)", Universal Library of Innovative Research and Studies, Volume 01, Issue 01.

Copyright: This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This article examines the causes of slippage and detachment of keratin (hot-melt) capsules in hair extension procedures from the perspective of micromechanical retention. The main focus is placed on practical working conditions and on how violations of basic principles lead to failure: poor polymer chemistry, deviation from the optimal capsule placement angle (˜30°), contamination of hands during the twist formation stage, and disproportion between donor and client strand weights. The methodology includes a literature review, a comparative analysis of various techniques (InvisiCaps, classical Italian hot-fusion, ultrasonic, and cold-bonding methods), and a prospective log of 100 in-salon cases. The primary endpoint was the time to failure (slippage/detachment); secondary endpoints included the failure type (adhesive or cohesive), affected zone, and conditions within the first 12–24 hours. The study demonstrates that the widespread belief that “masks and conditioners are the main cause of capsule loss” oversimplifies the problem. The decisive factor is re-contamination by the master’s hands, when oily fractions are transferred into the twisting zone. It is also shown that the correct placement angle (30°) and balanced strand selection significantly reduce detachment risk, while high-quality polymer chemistry stabilizes retention. The key contribution of the InvisiCaps method lies in integrating four controlled blocks — polymer, surface, angle, and geometry — into a single quality algorithm that ensures minimal failure rates and a stable aesthetic result.


Keywords: Keratin Hot-Melt; InvisiCaps; Adhesion–Cohesion; 30-Degree Angle; Strand Selection; Re-Contamination; Aftercare.

Download doi https://doi.org/10.70315/uloap.ulirs.2024.0101008