Self-adhesive Film Research Articles

Natural Light-Regulated Switchable Self-Adhesive Supramolecular Films for Smart Windows.

Switchable self-adhesive films are promising coating materials for constructing smart windows. Compared to commonly used hydrogels, self-adhesive supramolecular films have a variety of advantages and serve as a universal carrier of stimuli-responsiveness. In this study, supramolecular adhesive is processed into self-adhesive films, which display tough and long-stable adhesion to commercially available organic/inorganic glass windows. Spiropyrans are used as the photo-responsive units to endow smart windows with switchable optical behavior. Reverse photochromism is successfully realized by the combination of supramolecular films and spiropyrans. Reversible and rapid transformations in the color and transmittance of smart windows are fully achieved by natural light irradiation in different weather conditions, including sunny, rainy, and cloudy.

Functional Asymmetry-Enabled Self-Adhesive Film via Phase Separation of Binary Polymer Mixtures for Soft Bio-Integrated Electronics.

Biocompatible adhesive films are important for many applications (e.g., wearable devices, implantable devices, and attachable sensors). In particular, achieving self-adhesion on one side of a film with biocompatible materials is a compelling goal in adhesion science. Herein, we report a simple and easy manufacturing process using water-soluble hyaluronic acid (HA) that allows adhesiveness on only one side using binary polymer mixtures based on a phase-separation strategy with an elastomer. HA influx allows for the entangled polymer chains of the elastomer to spontaneously deform, permitting tunable mechanical elasticity, conformability, and adhesion. The proposed adhesive film enables the transfer of nanopatterning and the attachment of various surfaces without the use of additional chemicals. In addition, the film can be used for measuring epidermal biopotential and for skin fixation of drug devices. Therefore, the developed facile asymmetric adhesion can block the interferences of other materials on the unnecessary adhesion side, providing considerable potential for the development of functional, multifunctional, and smart bioadhesives.

Semi-occlusive management of fingertip injuries with finger caps: A randomized controlled trial in children and adults.

Background:Human fingertips can regenerate functionally and cosmetically excellent skin and soft tissues. Physiological conditions suppress scar formation and are thus a prerequisite for regenerative healing. Self-adhesive film dressings can provide such favorable conditions. The semi-occlusive treatment is superior to surgery. However, standard dressings leak malodorous wound fluid eventually until the wound is dry. Therefore, we developed and tested a silicone finger cap that forms a mechanically protected, wet chamber around the injury. Its puncturable reservoir allows access to the wound fluid for diagnostic and research purposes and the delivery of pro-regenerative drugs in the future.Methods:Patients >2 years with full-thickness fingertip injuries unsuitable for simple primary closure were randomized to start treatment with either the film dressing or the silicone finger cap. After 2 weeks, we changed to the other treatment. Patients’ choice on the preferred treatment after 4 weeks was the primary outcome parameter. Additionally, we monitored adverse events, unplanned visits, tissue gain, functionality, cosmetic outcome, and quality of life.Results:We randomized 11 patients 2 to 72 years to each group. Eighteen to 20 (90%, intention-to-treat) patients preferred the finger cap. All patients were satisfied with the cosmetic outcome, 88.9% had no disturbing sensibility changes, and 73.7% could report no distortion in the finger’s daily use. Epithelialization took between 5 weeks for Allen II and up to 9 weeks in Allen IV injuries. There were 19 device-related adverse events under film dressing and 13 under the finger cap. There were neither severe adverse device effects nor unexpected severe adverse device effects.Conclusion:Employing the summative or synthetic primary endpoint "patient decision for one or the other procedure," our pseudocross-over-designed RCT succeeded in statistically significantly demonstrating the superiority of the silicone finger cap over conventional film therapy. The finger cap was safe and effective, reaching excellent results on all treated injuries without any need for disinfection, antibiotics, shortening of protruding bones, or treatment of hypergranulations. Distal to the tendon insertions, we did not see any limitations regarding injury mechanism, amputation plane, or patients' age.

Effect of the addition of selected silicon fillers on Si- PSA shrinkage

The concept of shrinkage phenomenon is widely described in the available literature. With respect to pressure-sensitive adhesives (PSA) in general, the definition of shrinkage is understood to be "less than its original size" and is closely related to the crosslinking process and the effect of the crosslinker on the test adhesive. Shrinkage alongside adhesive properties (adhesion, tackiness) and mechanical (cohesion) is one of the most important characteristics of a self-adhesive adhesive. It is very important in terms of production when receiving, for example, decorative banners or self-adhesive films where crosslinked adhesive and thus shrinkage can affect the surface of the adhesive material and create deformations. In the case of PSA, the acceptable adhesive pressure shrinkage must not exceed 0.5 %. Contraction is an important criterion for assessing the aging resistance of PSA materials. There are no studies on the shrinkage of silicone pressure-sensitive adhesives in literature, but many references to carbon-based adhesives have been reported.

Investigate the Drag Resistance of Antifouling Self-Adhesive Film

Fouling has always been a common issue for ships as fouling drastically increases the surface roughness and ship resistance. The microfiber self-adhesive antifouling film is claimed to be effective up to 5 years and is environmentally friendly. However, there is lack of information about the drag characteristics of the antifouling material. Thus, this project is conducted based on an experimental study to determine the drag characteristics of the surface installed with microfiber self-adhesive antifouling film. The rotor apparatus is used to study the coefficient of friction of the microfiber surface. From the experimental results, a flat plate simulation using ANSYS-Fluent is conducted to further estimate the coefficient of friction up to Reynolds number of 109 and to evaluate the total ship resistance for the Semi-SWATH (fast vessel) and KVLCC (slow trading ships). The results show that the percentage increase in total ship resistance for the KVLCC is about 80%, which is more than the Semi-SWATH of 30%, as frictional resistance has high significance for slow trading ships. The speed drop experienced by the ship model installed with the microfiber antifouling is 2 knots for the KVLCC and 1 knot for the Semi-SWATH if the power remained the same for both models.

A universal approach for irreversible bonding of rigid substrate-based microfluidic devices at room temperature

We present a simple and universal method for irreversibly bonding rigid substrate-based microfluidic devices at room temperature. In this method, a pre-patterned self-adhesive film covers and seals the area of the rigid substrate containing microchannels to create a closed microfluidic system, and then an adhesive-assisted sandwich bonding is used to reinforce the strength of bonding. The bonding can be achieved in 10 min at room temperature without requiring cleanroom facilities, complex surface modification, or employing rigorous cleaning. Despite its simplicity, this bonding method can create high-performance microfluidic devices with burst pressures over 2 MPa, but without channel clogging or microstructure deformation. The universality of this bonding method is demonstrated by applying it to the production of microfluidic devices with various rigid substrates. The simplicity, low cost, and universality of our method should allow it to be adopted by researchers lacking access to cleanroom facilities.

Low-cost and Retrofittable Pose Estimation of Rigid Objects Using Infrared Markers

We present a system for the 6-DOF pose estimation of rigid objects which can be used for tool tracking in manual manufacturing applications like quality assurance or assembly assistance. To be practical and widely adaptable, the system must be low-cost, passive, impact resistant, retrofittable and applicable to arbitrary rigid objects. Therefore we attach circular markers of retroreflective self-adhesive film to relevant objects. A stereo camera system with IR illumination tracks the 3D positions of these markers and uses known marker constellations to estimate the object pose. Additionally a simple teach-in procedure which learns marker constellations of new objects is presented.

Study protocol for a randomized controlled pilot-trial on the semiocclusive treatment of fingertip amputation injuries using a novel finger cap

Introduction:Fingertip amputation injuries are common in all ages. Conservatively treated fingertips can regenerate skin and soft tissues to form a functionally and cosmetically excellent new fingertip. Little is known about this ability that, in humans, is confined to the fingertips. Even less is known about the role of the bacteria that regularly colonize these wounds without negative impact on regeneration and healing.As an alternative to surgery, self-adhesive film dressings are commonly used to establish a wet chamber around the injury. These dressings leak malodorous wound fluid eventually until the wound is dry. Having that into consideration, we have therefore developed a silicone finger cap that forms a mechanically protected, wet chamber around the injury for optimal regeneration conditions. It contains a puncturable reservoir for excess wound fluid, which can be thus routinely analyzed for diagnostic and research purposes.This study protocol explains the first randomized controlled trial (RCT) on the semiocclusive treatment of fingertip amputations in both children and adults comparing traditional film dressings with the novel silicone finger cap. Being the first RCT using 2 medical devices not yet certified for this indication, it will gather valuable information for the understanding of fingertip regeneration and the design of future definitive studies.Methods and analysis:By employing an innovative pseudo-cross-over-design with a dichotomous primary endpoint based on patients preference, this pilot study will gain statistically significant data with a very limited sample size. Our RCT will investigate acceptance, safety, effectiveness, and efficacy of this novel medical device while gathering information on the clinical course and outcome of conservatively treated fingertip injuries. A total of 22 patients older than 2 years will be randomly assigned to start the conservative treatment with either the traditional film-dressing or the novel finger cap. The treatment will be changed to the other alternative for another 2 weeks before the patient or the guardian is confronted with the decision of which method they would prefer for the rest of the treatment (if required).Ethics and dissemination:Ethical approval (EK 148042015) of the study protocol has been obtained from Institutional Review Board at the TU Dresden. The trial is registered at the European Database on Medical Devices (EUDAMED-No.: CIV-15-03-013246) and at ClinicalTrials.gov (NCT03089060).

PD31-09 PENILE PROSTHESIS IMPLANTATION (PPI) PLUS CORPOREAL RECONSTRUCTION WITH COLLAGEN-FLEECE GRAFTING IN THE TREATMENT OF PEYRONIE’S DISEASE (PD) WITH OR WITHOUT ED

You have accessJournal of UrologySexual Function/Dysfunction: Peyronie’s Disease I1 Apr 2017PD31-09 PENILE PROSTHESIS IMPLANTATION (PPI) PLUS CORPOREAL RECONSTRUCTION WITH COLLAGEN-FLEECE GRAFTING IN THE TREATMENT OF PEYRONIE’S DISEASE (PD) WITH OR WITHOUT ED Claudio Martínez Ballesteros, Juan Ignacio Martínez-Salamanca, Eugenio Cerezo, Agustín Fraile, Esaú Fernández Pascual, Luis Del Portillo, and Joaquín Carballido Claudio Martínez BallesterosClaudio Martínez Ballesteros More articles by this author , Juan Ignacio Martínez-SalamancaJuan Ignacio Martínez-Salamanca More articles by this author , Eugenio CerezoEugenio Cerezo More articles by this author , Agustín FraileAgustín Fraile More articles by this author , Esaú Fernández PascualEsaú Fernández Pascual More articles by this author , Luis Del PortilloLuis Del Portillo More articles by this author , and Joaquín CarballidoJoaquín Carballido More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2017.02.1387AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES The most successful treatment option of Peyronie's disease remains surgical, despite also being the most invasive. There are described several techniques for the correction of penile curvature, being technically demanding those in which grafts are used. We present our initial experience and preliminary results of partial plaque incision and grafting with self-adhesive film containing collagen combined with PPI (inflatable or malleable) in the treatment of Peyronie's disease. METHODS Between January 2015 and August 2016 we operated 14 patients using this technique, six by implantation of a malleable prosthesis and the other eight with inflatable. Five of them kept proper erectile function and three had significant shortening of the penis without curvature. Four of them had been previously operated: one inflatable prosthesis + modeling; and other with sequelae after simple plication. The mean presurgical PDQ PD bother score was 9.7(8-12). Surgery was performed in the case of malleable through a single incision (with penile degloving) while IPP was performed either by 2 incisions (scrotal + penile degloving) or through a single incision (Kulkarni approach). Curvature correction was made by partial plaque incision with an H modified technique in the area of maximum curvature (or corporeal relaxing incisions) and placing a patch without suturing, covering prosthethic material. RESULTS The mean operative time was 69 (55-85) min. The mean postsurgical penile lengthening was 4.5 (3-6) cm. There was an improvement in PDQ PD bother score of 4.5(2-5) points. No patients had hematoma, glans isquemia or any infectious complications. All patients showed good capability of penetration and correction of the penile curvature (<10 grades of residual curvature in the seven patients) 3 months after surgery. Six patients had glans hypoestesia at this time, while after the first three months, only 3 of them remains symptomatic. The overall satisfaction rate was of 90%. CONCLUSIONS In our experience, plaque incision and collagen fleece grafting during penile prosthesis implantation seems to be a safe and reproducible technique that yelds higher satisfaction rates and greater penile lengthening than prosthesis implantation alone. Also this technique could be consider in the management of sequalae after PD surgery. © 2017FiguresReferencesRelatedDetails Volume 197Issue 4SApril 2017Page: e586 Advertisement Copyright & Permissions© 2017MetricsAuthor Information Claudio Martínez Ballesteros More articles by this author Juan Ignacio Martínez-Salamanca More articles by this author Eugenio Cerezo More articles by this author Agustín Fraile More articles by this author Esaú Fernández Pascual More articles by this author Luis Del Portillo More articles by this author Joaquín Carballido More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ...

The use of Tissue PatchTM to Reduce the Duration of Air Leak Following Lung Volume Reduction Surgery.

Prolonged post-operative air leak is a recognised complication in patients receiving lung volume reduction surgery (LVRS). Some patients are transferred to a portable flutter-valve bag to facilitate discharge. TissuePatchTM is a synthetic absorbable self-adhesive film which acts as an adjunct to minimise air leak.

Application of selected 2-methylbenzothiazoles AS cationic photoreactive crosslinkers for pressure-sensitive adhesives based on acrylics

Since their introduction half a century ago, acrylic pressure-sensitive adhesives have been successfully applied in many fields. They are used in self-adhesive tapes, label signs, marking films and protective films as well as in medical pharmaceutical applications for plaster, in dermal dosage systems and in a wide range of biomedical electrodes. In the last 15 years or so, the UV technology, especially UV-crosslinking, is well established in the market and allows the production of UV-crosslinkable pressure-sensitive adhesives (PSA) based on acrylics with interesting performance. So much so that the larger manufacturers of pressure-sensitive adhesive materials and their suppliers now use very expensive equipment to study pressure-sensitive adhesive behavior: tack, peel adhesion and shear strength. The balance between adhesive and cohesive strength after the crosslinking process is very important and critical for properties of acrylic PSA in form of self-adhesive films. In this work the cationic UV-crosslinking of acrylic PSA containing epoxy groups in their structure and additionally cationic photoinitiators based on 2-methylbenzothiazoles as photoreactive crosslinkers have been investigated using UV-lamp as ultraviolet sources. The investigated acrylic PSA were synthesized from 80wt% of butyl acrylate, and 20wt% of glycidyl methacrylate. The use of selected photoreactive crosslinkers: 1,5-bis[N,N׳-(2-methylbenzothiazolium)]pentane diiodide and 1,10-bis[N,N׳-(2-methylbenzothiazolium)]decane diiodide allows manufacturing of high quality PSA materials with interesting properties, such as high tack, high peel adhesion, and excellent shear strength.

Preparation and Characterization of Eudragit E Self-Adhesive Films with Cytisine

ABSTRACTThe aim of this study was to prepare model formulations with Cytisine based on Eudragit E crosslinked films with modified release, suitable for topical application. The main factors that play a major role in the drug release were investigated and considered. The model formulations containing 3 % to 6 % of crosslinking agent could be proposed as the most suitable for preparation of transdermal drug release systems containing Cytisine. The prepared model formulations will be further optimized by utilization of multivariate regression analysis and experimental design in order to achieve the desired drug release profile.

Development of novel transdermal self-adhesive films for tenoxicam, an anti-inflammatory drug

Aim The purpose of this study was to develop transdermal films (TFs) with the addition of different polymer ratios that incorporated 0.5% tenoxicam in order to ensure maximum controlled and sustained drug release capacity. Tenoxicam is a non-steroidal anti-inflammatory drug (NSAID) widely used in the treatment of rheumatic diseases and characterized by its efficacy and reduced side effects in comparison to other NSAIDs. Main methods Transdermal films of tenoxicam were designed with the Eudragit L30D-55copolymer with permeation enhancers like polyethylene glycol (PEG) and propylene glycol (PG) incorporated at different concentrations using the casting evaporation technique. Evaluations of these formulae were performed through mechanical characterizations and Fourier Transform Infrared Spectroscopy [FTIR]. In-vitro release studies were performed during 24 h using diffusion cells. The film formulations with optimum in vitro-release rate have been taken up for testing of the anti-inflammatory effects and the sustaining action of tenoxicam. The in-vivo studies performed included carrageenan-induced hind paw edema and skin biopsies in Wistar rats. Key findings Formulation (F7) had the best effective combination [glycerol (0.25 g), PEG200 (0.5 g), PEG400 (1 g) and PG (10%) and 0.5% dispersed drug] among all of the tenoxicam TF formulations studied. Also, this formula had the highest release value than formula 1 (F1) that contains [glycerol (2.5 g), PEG200 (0.5 g), PEG400 (0.5 g) and 0.5% dissolved drug] or a commercially available gel after 24 h. FTIR revealed that there was an interaction between the polymer and the drug. The drug–polymer interaction occurring between tenoxicam and Eudragit L30D-55 seems to cause a drag effect, leading to a delay of the tenoxicam release from the Eudragit L film. Significance When the films were applied half an hour before the subplantar injection of carrageenan in the hind paw of Wistar rats, it was observed that formula F7 provided maximum inhibition of paw edema in rats over 24 h in contrast to both formula F1 and the marketed piroxicam gel as a reference. This was also confirmed histopathologically from skin biopsies. Thus, we show that tenoxicam can be formulated into transdermal films to sustain its release characteristics, and the polymeric composition of PEG200/PEG400 at a ratio of 1:2 and 10% PG was found to be the best choice to manufacture tenoxicam TF.

Polyurethane pressure-sensitive adhesives as raw materials for the manufacturing of protective films

Polyurethane pressure-sensitive adhesives as raw materials for the manufacturing of protective films The present paper relates to water-borne polyurethane pressure-sensitive adhesives (PU-PSA) systems for self-adhesive protective films, and methods of their preparation. The typical protective films are self-adhesive films with excellent removability. Their manufacture is a film conversion process using common materials developed for the packaging industry (PVC and polyolefins). The most often used carrier for the constructions of protective films is PE. Polyurethane PSA layers are characterized by constant low peel adhesion between 3 and 5 N/2,5 cm.

Properties of adhesives and adhesive materials used in aviation industry

Methods for developing adhesives and adhesive material used in the structures of almost all units of aviation machinery are described step by step. The properties of high-strength film-forming adhesives; adhesive prepregs; sandwich-type aluminum-polymer materials (SIALs); cold- and hot-setting adhesives intended for gluing metals, different nonmetallic materials, and combined joints; and self-adhesive film materials of ZPPK and FAS grades are given. It is also shown where and for which purposes these adhesives are applied.

New european manufacturing facility for self-adhesive films

New european manufacturing facility for self-adhesive films