Label adhesive-bonded

Fluorination of polyolefin bottles, usually HOPE, is designed to improve their barrier capability, especially to hydrocarbons. In fluorination, the container is exposed to fluorine gas, which reacts on the surface of the container, replacing some C-H bonds with C-F bonds. The increased surface polarity decreases the container s permeability to nonpolar penetrants such as hydrocarbons. It also increases adhesion to inks, coatings, and label adhesives. 

Figure 9.19 Leclanche ceU. (a) Carbon electrode, (b) jacket-labeled polyethylene bonded tube, (c) separator coated paper, (d) paper cup, (e) metal cup (positive contact), (f) plastic closure, (g) sealant, (h) cathode mix (manganese dioxide, carbon, and electrolyte), (i) zinc can, (j) adhesive-backed barrier film, (k) paper, (1) label, (m) cathode mix (see h), (n) separator, (o) zinc can, and (p) metal bottom cover (negative contact). (Reproduced with permission from Ref. [25], 1985, Wiley-VCH.)...

In a similar study, Brewis et al prepared sandwiches of a nylon-epoxy adhesive between aluminum adherends and exposed them to water vapor labeled with tritium for up to 6 weeks at 50°C. The bonds were then cut into small rectangular sections and the fractional water uptake measured by liquid scintillation counting. The values were compared with those calculated for diffusion and were found to agree well for the outer pieces. For the inner pieces the measured uptake was less than the predicted value. The adhesive contained a carrier and the results seem to imply that this hinders the passage of water into the adhesive bond. These results show... 

Materials bonded, that is, paper adhesive, metal-plastic adhesive, can label adhesive. 

All adhesives are polymers, and they are used in many ways, for example in composites, automotive tire cords, ply yood, tapes and labels. A particularly demanding application is the cementing of metal joints in military aircraft with polymers such as epoxy resins. The interfaces in such materials must be characterized to determine the strength of the adhesive bond and the relation of such properties as peel strength with... 

Flame treatment is widely used to prepare polyolefin surfaces for adhesive bonding, particularly in labelling operations. This method is purported to burn-off contaminants and weak boundary layers, and also produces surface oxidation. Although flame treatment can be readily automated on a container labelling line, it is very impractical for most product assembly operations. 

Starch is reacted with tertiary or quaternary amine halides or epoxides under alkaline conditions. The cationic starches improve sheet strength, possibly through ionic bonding with slightly anionic paper. The cationic starches are also used in bottle-labeling adhesives and in paperboard. 

Adhesives are widely used in many industries for various different applications such as in the automotive industry for bonding entire car bodies, or in the packaging industry for attaching labels, or for various applications in households. Many more examples could be listed. The adhesive bonding technology offers a lot of advantages over other more conventional joining methods. 

Uses Tackifier for pressure-sensitive adhesives, construction adhesives, pick-up gums for labeling adhesion promoter for difficult-to-bond substrates food-pkg. adhesives, coatings, paper defoamer in food-contact paper/paperboard Regulatory FDA 21CFR 175.105,175.300,176.170,176.180,176.210 Properties Gardner 11 color soften, pt. (R B) 139 C acid no. 133-147 Sylvatac 295 [Arizona]... 

Adhesives. Acryhc emulsion and solution polymers form the basis of a variety of adhesive types. The principal use is in pressure-sensitive adhesives, where a film of a very low T (<—20 " C) acrylic polymer or copolymer is used on the adherent side of tapes, decals, and labels. Acrylics provide a good balance of tack and bond strength with exceptional color stabiUty and resistance to aging (201,202). AcryUcs also find use in numerous types of constmction adhesive formulations and as film-to-film laminating adhesives (qv). 

The type of adhesive used depends on the surface of the item to be labeled. The adhesive must provide an adequate bond between the label and the container. Labeling of paper-based materials (unless specially treated) and glass usually... 

Where bonding areas are large or there is a need for shape conformity between bonded parts Where the intention is to dismantle the bond later, the use of various labels, surgical and pressure-sensitive tapes, adhesives for positioning and locating parts, in lieu of jigs, prior to assembly by other means... 

Pressure-Sensitive Films Adhesives Labels, Stickers Decals Coating Services Laminating Bonding Systems... 

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