Effect of the rheological properties of industrial hot-melt and pressure-sensitive adhesives on the peel behavior

Gibert, F.X.; Allal, Ahmed; Marin, G.; Dérail, Christophe

doi:10.1163/156856199x00497

Cited by 41 publications

(19 citation statements)

References 8 publications

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“…For example, it may be concluded that soywax would be a good candidate to replace NWA in applications where fluidity is required at lower temperatures, or alternately, that NWA can replace soywax where comparable viscosities are required at higher temperatures. Melt viscosity is an important consideration in applications such as hot melt adhesives, where a specific melt viscosity range is required to uniformly extrude and apply an adhesive and work the surfaces together into the desired geometry before curing begins .…”

Section: Resultsmentioning

confidence: 99%

A toolbox for the characterization of biobased waxes

Floros

Raghunanan

Narine

2016

Euro J Lipid Sci & Tech

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Waxes are a diverse class of molecules with numerous industrial, commercial, household, medical, and personal applications. Despite the wide variety of applications and chemical structures, most waxes are currently classified entirely by their melting and congealing points. This limits the ability to compare wax performance across the literature and impedes efforts at improving the physical functionality of biobased wax mimetics; many applications require waxes with specific physical properties that cannot be correlated to congealing or melting points alone. A toolbox of procedures to characterize and compare waxes based on not only their melting and congealing points, but also the hardness, yield force, viscosity, and solid fat content is presented. This comprehensive toolbox for the characterization of waxes provides a detailed assessment of their individual functional properties and provides an important tool for holistic comparisons of types of waxes based on their performance. This toolbox is especially useful for analyzing and finding potential applications for the next generation of emerging renewable waxes which are being introduced to the market. Practical applications: An increasing number of lipid derived waxes are entering the market. This toolbox provides a set of reproducible and useful experiments which can be used to analyze and compare the properties of waxes. By focusing on properties relevant to a wide range of wax applications, both end users and suppliers can quickly screen new waxes and determine their applicability for specific functions. This is presently not accomplished using only the ASTM standards of the industry. A wax toolbox containing a series of reproducible methods are presented for determining the melting point, congealing point, hardness, yield force, viscosity, and solid fat content of waxes. This toolbox is especially useful for characterization and comparison of waxes based on their functional performance, and can be used to predict the suitability of waxes for specific applications.

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Section: Resultsmentioning

confidence: 99%

A toolbox for the characterization of biobased waxes

Floros

Raghunanan

Narine

2016

Euro J Lipid Sci & Tech

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“…On the first question, it has been shown that the shift in time of certain characteristic relaxation times of a polymer led to a shift of the same magnitude in the debonding rate at which a transition from cohesive to adhesive failure was observed in peel tests, implying therefore that the rheological properties of the adhesive control its adhesive behavior. [49,50] On the second question, however, a direct prediction of r max , e max or W from the small-strain viscoelastic properties and a surface property such as the surface tension of the substrate is currently not possible. According to recent studies, [24,51,52] a quantitative prediction of peel forces of fibrillating adhesives requires data on the elongational properties of these polymers.…”

Section: Discussionmentioning

confidence: 99%

Micromechanisms of Tack of Soft Adhesives Based on Styrenic Block Copolymers

Brown¹,

Hooker²,

Creton³

2002

Macromol. Mater. Eng.

108

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“…Table I lists some families of PSA with some selected experimental references focusing on those families of adhesives. (Nakajima, 1992, Gibert et al, 1999, Daoulas et al, 2004 Silicones It is worthwhile now to translate the physical and rheological properties that are required to display adhesion into polymer chain architecture. Since the modulus must be below 0.1 MPa at 1…”

Section: Materials Used For Pressure-sensitive-adhesivesmentioning

confidence: 99%

Fracture and adhesion of soft materials: a review

2016

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Soft materials are materials with a low shear modulus relative to their bulk modulus and where elastic restoring forces are mainly of entropic origin. A sparse population of strong bonds connects molecules together and prevents macroscopic flow. In this review we discuss the current state of the art on how these soft materials break and detach from solid surfaces. We focus on how stresses and strains are localized near the fracture plane and how elastic energy can flow from the bulk of the material to the crack tip. Adhesion of pressure-sensitive-adhesives, fracture of gels and rubbers are specifically addressed and the key concepts are pointed out. We define the important length scales in the problem and in particular the elasto-adhesive length Γ/E where Γ is the fracture energy and E is the elastic modulus, and how the ratio between sample size and Γ/E controls the fracture mechanisms. Theoretical concepts bridging solid mechanics and polymer physics are rationalized and illustrated by micromechanical experiments and mechanisms of fracture are described in detail. Open questions and emerging concepts are discussed at the end of the review.

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Effect of the rheological properties of industrial hot-melt and pressure-sensitive adhesives on the peel behavior

Cited by 41 publications

References 8 publications

A toolbox for the characterization of biobased waxes

A toolbox for the characterization of biobased waxes

Micromechanisms of Tack of Soft Adhesives Based on Styrenic Block Copolymers

Fracture and adhesion of soft materials: a review

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