Physical properties of hydrocolloid wet glues

Ben-Zion, O.; Nussinovitch, A.

doi:10.1016/s0268-005x(97)80041-0

Cited by 45 publications

(33 citation statements)

References 11 publications

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“…Upon reaching an asymptote (increased velocity), steady-state cohesive failure was dominant, and surface roughness, therefore, had no effect on bond formation. These results were supported by previous ndings utilizing the 90 ± peel test for dough [34] and hydrocolloi d wet glues [35]. Figure 12a and b shows the tack vs longitudina l load for dough tested with the two probes, and illustrates trends similar to those found for the other PSAs.…”

Section: Resultssupporting

confidence: 85%

Testing the rolling tack of pressure-sensitive adhesive materials. Part II: Effect of adherend surface roughness

Ben-Zion¹,

Nussinovitch²

2002

Journal of Adhesion Science and Technology

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A novel method and custom-made apparatus for testing the rolling tack of pressuresensitive adhesives (PSAs) and related materials were developed to measure bonding and debonding processes. The combined effects of adherend (probe) surface roughness, longitudinal load, and dwell time on bond-formation performance of ve different tacky materials chosen from various application areas were studied. These materials included synthetic PSAs (acrylic tape and the hydrocolloid dressing, Granu ex ® ), water-remoistenable adhesive (CENTRAL ® ), edible wheat our dough, and a static cling vinyl (PENSTIC ® ). Tack-rolling velocity curves were analyzed to study bonding and debondong processes. Each of the tested materials showed different tack behavior in response to varying probe roughness, external load, and velocity (dwell time). Surface wetting and mechanical interlocking were proposed as the mechanisms governing tack in most tested PSAs. Acrylic PSA tested on a smooth probe over a velocity range of 0.12-2.12 m / s showed higher tack values than on a rough one. A signi cant reduction in tack was due to restricted bond formation. Similarly, tack of Granu ex ® to a smooth model skin surface showed higher values than to a rough skin surface. CENTRAL ® showed typical cohesive failure when tested on silicone-coated paper. Interfacial failure and short-term bonding accounted for good tack performance on porous paper. Dough tested with aluminum probes showed cohesive failure similar to that of CENTRAL ® at velocities higher than 0.2 m/ s where the tack was independent of probe surface roughness. PENSTIC ® adhered only to smooth glass where the tack values tended to decrease with increased velocity. Bonding and debonding processes of the various tacky materials were clearly affected by adherend surface roughness, longitudinal load, and dwell time, and could be successfully analyzed using our novel proposed method and apparatus.

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Section: Resultssupporting

confidence: 85%

Testing the rolling tack of pressure-sensitive adhesive materials. Part II: Effect of adherend surface roughness

Ben-Zion¹,

Nussinovitch²

2002

Journal of Adhesion Science and Technology

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“…The patches were peeled from a skin model sample as previously described (30,31). The skin model was immersed in distilled water for 5 s to reach a relative humidity of ∼25%.…”

Section: Peeling Testmentioning

confidence: 99%

Physical Properties of Gum Karaya-Starch-Essential Oil Patches

2010

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Abstract. Essential oils are used in foods, cosmetics, and pharmaceuticals. Despite the recent marketing of novel essential-oil-containing patches, there is no information on their production, constituents, or physical properties. The objectives of this study were to produce essential-oil patches and characterize their physical properties. The essential oil of Lavandula angustifolia (lavender) was included at concentrations of 2.5% to 10% in patches manufactured from the exudate gum karaya, propylene glycol, glycerol, emulsifier, and optionally, potato starch as filler. Inclusion of essential oil reduced patch strength, stiffness, and elasticity relative to patches without essential oil. Inclusion of starch in the essential-oil patches strengthened them, but reduced their elasticity. Patches' adhesion to substrate was examined by both peeling and probe-tack tests: the higher the inclusion of essential oils within the patch, the larger the decrease in its adhesion to substrate. Addition of starch to essential-oil-containing patches increased their adhesion relative to their essential-oil-only counterparts. Scanning electron micrographs of the patches provided evidence of entrapped starch granules. Although inclusion of essential oil reduced both the mechanical properties and adhesion of the patches, a high proportion of essential oil can still be included without losing patch integrity or eliminating its adhesiveness to the skin.

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“…The patches were peeled from skin model samples in accordance with a previously described method (20,21). Before the peel tests were conducted, the skin model was wetted with a known amount of water and the patch was attached and left on the skin model surface.…”

Section: Peel Testmentioning

confidence: 99%

Physical Characterization of a New Skin Bioadhesive Film

2008

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Abstract. Physical properties (roughness, gloss, mechanical, surface topography and adhesive) of a bioadhesive film for the transdermal delivery of drugs and its interactions with a skin model surface were studied. Roughness is a measurement of the small-scale variations in the height of a physical surface. No significant differences in Ra between the "x" and "y" dimensions for both the skin model and patch were detected, due to uniformity in their production. Scanning electron microscope pictures showed small particles projected from the film. Those particles resulted in increasing roughness and surface area. For the patch, gloss values measured at 20°were 6.0±0.9 and at 60°, 32.2±2.2 gloss units, respectively, indicating a semi-gloss material. Concerning the mechanical properties, the tensile strength of the film resulted four-to sevenfold greater than the peel force from the model skin used, indicating the suitability of the film for skin application. The adhesion to skin model depended on the amount of water used for film application and on the elapsed time between film application and removal. Finally, the model skin that was invented by Charkoudian can be used as an alternative to costly and highly variable human skin substrates since it possesses human topography.

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Physical properties of hydrocolloid wet glues

Cited by 45 publications

References 11 publications

Testing the rolling tack of pressure-sensitive adhesive materials. Part II: Effect of adherend surface roughness

Testing the rolling tack of pressure-sensitive adhesive materials. Part II: Effect of adherend surface roughness

Physical Properties of Gum Karaya-Starch-Essential Oil Patches

Physical Characterization of a New Skin Bioadhesive Film

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