Evaluation of adhesive properties of three resilient denture liners by the modified peel test method

2009 ◽  
Vol 5 (2) ◽  
pp. 764-769 ◽  
Author(s):  
Yasuhiro Tanimoto ◽  
Hiroyuki Saeki ◽  
Suguru Kimoto ◽  
Tsuyoshi Nishiwaki ◽  
Norihiro Nishiyama
Keyword(s):  
Peel Test ◽  
Test Method ◽  
Adhesive Properties ◽  
Denture Liners

scholarly journals Correlation between Surface Energy and Adhesion Force of Polyethylene/Paperboard: A Predictive Tool for Quality Control in Laminated Packaging

2018 ◽  
Vol 2018 ◽  
pp. 1-7 ◽  
Author(s):  
Danielle M. F. Madeira ◽  
Osvaldo Vieira ◽  
Luís Antonio Pinheiro ◽  
Benjamim de Melo Carvalho
Keyword(s):  
Quality Control ◽  
Surface Energy ◽  
Adhesion Force ◽  
Paper Industry ◽  
Peel Test ◽  
Practical Method ◽  
Test Method ◽  
Predictive Tool ◽  
Contact Angle Analysis ◽  
Poor Adhesion

Poor adhesion continues to be a problem for manufacturers of laminated packaging. Therefore, the aim of this research was to study the effect of flame treatment, the type of coating, and starch application on the adhesion force of polyethylene/paperboard. The force of adhesion was determined using the peel test method; the paper surface energy was assessed by contact angle analysis; and paperboard roughness was determined by profilometer. The flame treatment did not affect the surface roughness but significantly increased the paperboard surface energy. The paperboard coated with polar latex showed much higher surface energy than the paperboard coated with nonpolar latex. The adhesion force of polyethylene presented a linear correlation to the surface energy of the paperboard. Therefore, the surface energy of paperboard is an excellent indication of its adhesion force to polyethylene, and this represents a very reliable and practical method in terms of quality control in the paper industry for producing laminated packages.

scholarly journals Fabrication of an Electrically Conductive Adhesive for Skin Mounted Bioelectronic Devices

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Sunland L. Gong ◽  
Min Ku Kim ◽  
Tae Hoo Chang ◽  
Chi Hwan Lee
Keyword(s):  
Treatment Options ◽  
Peel Test ◽  
Sodium Dithionite ◽  
Conductive Adhesive ◽  
Adhesion Forces ◽  
Adhesive Properties ◽  
Electrically Conductive ◽  
Covalent Bonds ◽  
Electrically Conductive Adhesive ◽  
Length Width

Background: Skin mounted bioelectronics are difficult to integrate with the skin since biocompatible adhesives are not conductive or unsuitable for long-term use. Skin conformability is essential but strong adhesives can damage soft tissue in younger and frail individuals as well as the device during removal. Developing a noninvasive long-lasting biocompatible conductive adhesive for skin that can be used with bioelectronics allows for better treatment options and the improvement of patient outcomes. Methods: This study creates a soft hydrogel using graphene oxide flakes (GO) and polyvinyl alcohol. Networked GO is reduced in a solution of sodium dithionite and sodium hydroxide to form a conductive network within the hydrogel. Adhesive properties are achieved by incorporating a polyacrylic acid polymer into the hydrogel with the addition of N-hydroxysulfosuccinimide (NHS) groups to the polymer. NHS reacts with amine groups found on tissue to form covalent bonds that can be released with a biocompatible trigger solution of sodium bicarbonate and glutathione. Results: Hydration of the hydrogel at 65°C demonstrated that the hydrogel swelled anistropically with swelling ratios of 1.05/1.06/5.5 (length/width/thickness). This showed that the hydrogel can integrate into various surfaces without deformation. The hydrogel demonstrated an impedance of 106.1~164.6 Ω⋅m (20~500 Hz), which is comparable to conventional devices. The hydrogel was chemically bound to amine functionalized polydimethylsiloxane (PDMS) and glass. Peel test showed peak adhesion forces of 100.5 N⋅m-1(Force⋅Width-1) when bound to PDMS or glass. Signal quality of the hydrogel showed that the hydrogels demonstrated ECG and EMG signals comparable to commercially available materials. Conclusions: The importance of this study is to create a soft material that bonds between electrodes and skin. The results demonstrate that the hydrogel has electrical characteristics comparable to conventional electrodes for use in ECG and EMG. In addition, it can create adhesion via chemical bonds that can be released on demand.

scholarly journals Effects of Various Antifouling Coatings and Fouling on Marine Sonar Performance

Polymers ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 663 ◽  
Author(s):  
Bradley Donnelly ◽  
Ian Bedwell ◽  
Jim Dimas ◽  
Andrew Scardino ◽  
Youhong Tang ◽  
...  
Keyword(s):  
Failure Modes ◽  
Transmission Loss ◽  
Fuel Efficiency ◽  
Peel Test ◽  
Acoustic Properties ◽  
Frictional Drag ◽  
Adhesive Properties ◽  
Adhesion Properties ◽  
Antifouling Coatings ◽  
The Impact

There is a rising imperative to increase the operational availability of maritime vessels by extending the time between full docking cycles. To achieve operational efficacy, maritime vessels must remain clear of biological growth. Such growth can cause significant increases in frictional drag, thereby reducing speed, range and fuel efficiency and decreasing the sensitivity of acoustic sensors. The impact that various stages of fouling have on acoustic equipment is unclear. It is also unclear to what extent antifouling techniques interfere with the transmission of acoustic signals. In this study, to examine this effect, neoprene samples were coated with three antifouling coatings, namely, Intersmooth 7460HS, HempaGuard X7 and Hempasil X3. Other neoprene samples were left uncoated but were imbedded with the biocide, 4,5-dichloro-2-octyl-4-isothiazolin-3-one (DCOIT) during the mixing and curing process. Uncoated nitrile samples that had varying levels of fouling from immersion in Port Phillip Bay, Australia, for 92, 156 and 239 days were also extracted. The acoustic properties of these samples were measured using an acoustic insertion loss test and compared to uncoated neoprene or nitrile to ascertain the acoustic effects of the applications of antifouling coatings as well as the fouling growth itself. A T-peel test was performed on all coated samples in an attempt to understand the adhesive properties of the coatings when applied to neoprene. It was found that the application of antifouling coatings had little effect on the transmission characteristics of the neoprene with approximately 1 dB loss. The embedment of DCOIT, however, has a chance of causing aeration in the neoprene, which can heavily hamper transmission. An assessment of the effect of the fouling growth found that light and medium fouling levels produced little transmission loss, whereas more extreme fouling lead to a 9 dB transmission loss. The adhesion properties of the coatings were investigated but not fully ascertained as tensile yielding occurred before peeling. However, various failure modes are presented and discussed in this study.

scholarly journals Enhancement of the Surface Properties on Polypropylene Film Using Side-Chain Crystalline Block Copolymers

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2736
Author(s):  
Sho Hirai ◽  
Patchiya Phanthong ◽  
Hikaru Okubo ◽  
Shigeru Yao
Keyword(s):  
Surface Modification ◽  
Surface Properties ◽  
Peel Test ◽  
Side Chain ◽  
Tensile Shear ◽  
Adhesive Properties ◽  
Water Contact ◽  
High Mechanical Strength ◽  
Modification Method ◽  
Plausible Mechanism

The consumption of polypropylene (PP) has significantly increased over that of other materials because of its light weight, easy molding, and high mechanical strength. However, the applications of PP are limited, owing to the lack of surface properties, especially with respect to adhesive properties and hydrophilicity. In this study, we developed a surface modification method for enhancing the adhesive properties and hydrophilicity on the PP surface using a side-chain crystalline block copolymer (SCCBC). This method was simple and involved the dipping of a PP film in a diluted SCCBC solution. The optimized modification conditions for enhancing the adhesive properties of PP were investigated. The results revealed that the adhesion strength of PP modified with the SCCBC of behenyl acrylate and 2-(tert-butylamino)ethyl methacrylate was enhanced to 2.00 N/mm (T-peel test) and 1.05 N/mm2 (tensile shear test). In addition, the hydrophilicity of PP modified with the SCCBC of behenyl acrylate and di(ethylene glycol)ethyl ether acrylate was enhanced to a water contact angle of 69 ± 4°. Surface analysis was also performed to elucidate a plausible mechanism for PP modification by the SCCBCs. This surface modification method is facile and enhances desirable properties for the wide application of PP.

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