Hot-melt glues

Presented here are only the methods that the author has tested in practice on plastics wastes. The first attempts were undertaken in 1986 in a small pilot unit that dealt with wastes of polyolefin films used for packaging. Those wastes were nonpigmented, transparent and rather clean. They were provided by waste collectors in blocks of approximately 30 kg, intended for factories producing regenerated granules (recyclate). The intention was to show the potential of producing a polyolefin wax to be used in polish applications or in hot-melt glues from those wastes. 

In using a bottom load case packer for a packaging operation, the containers are accumulated and unitized into the selected case pattern. As the unitized load is indexed onto the lift platform, a case blank is unfolded from the case magazine over the product. The lift platform raises the product into the opened case. The case is indexed out of the loading area and is top and bottom sealed by a hot melt glue system. The bottom load case packer is the best type of case packer for containers that require stacking, pads, or automatic case insertion. 

Animal base skin, bones, leather, fish and casein glue (most important glue for bottle labelling), glutin hot-melt glue. 

Cartridge type filters are operated at relatively low hydrostatic pressures. Their useful life is limited due to plugging of the membrane pores by retained solutes. The actual cartridge is made by pleating a membrane sheet and potting the ends by an appropriate resin or hot-melt-glue as indicated in Figure 1.33 (a). 

Lastly, some glues harden, at least in part, by congealing or freezing as they cool. Such glues are often called hot melts . Older examples of hot melts include the hot applied resins and waxes and, to some extent, the hot animal glues. Synthetic polymer hot-melt glues have recently become widely used in industry and may have conservation applications as well. 

Plant Resin Formulations, Sometimes compounded with shellac, as in DeKhotinsky cement, these compounds have long been used as hot-melt glues. Likewise, waxes of plant and animal origin have also been used as hot-melt adhesives (22). They all should be reversible by application of heat, possibly in conjunction with solvent action in the more diflScult cases. 

Styrene-butadiene-styrene Solvent-based and hot-melt glues... 

These materials are cut out as various parts, which are then assembled and stuck together with hot melt glue, thus creating the final shape of the casting, also taking into consideration any possible shrinkage of the metal. 

Electric hot-melt glue gun with sticks of adhesive. 

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