Adhesives for packaging

The species -O-N-R in the scheme is a stable organic radical called a nitroxide, one type of radical that does not react with itself but which reacts with carbon radicals forming weak C-O-N bonds. This approach continues to develop and allows the synthesis of polymers with very narrow molar mass distributions, block copolymers, and polymers with different architectures such as highly branched materials (discussed shortly). This is but one of a limited number of techniques that show promise for producing improved thermoplastics, elastomers, and adhesives for packaging and automotive applications (Anon. 2002). 

Vinyl monomers that can be grafted to cellulose to achieve adhesive properties are acrylic acid, acrylonitrile, methyl methacrylate, and many others. Graft copolymers of cellulose derivatives have also found use as adhesives. For example, vinylacetate-grafted hydroxyethylcellulose can be used as an adhesive for packaging and tile ( ). Grafting of vinyl monomers onto lignocellulosic materials can convert them into suitable adhesive materials (0). 

Polyterpene resins are transparent, light yellow, odorless, nontoxic, brittle, solid thermoplastic polymers (softening point 80-125 °C) with a relatively low Mw in the range of 1.200-1.300. They are used as tackifiers in hot-melt adhesives for packaging, wood, furniture, and assembly adhesives, in bookbinding, hygiene, nonwoven fabrics, pressure sensitive tapes and labels, industrial and automotive adhesives, and aerospace... 

Santel HR-97 is a water-based primer for all grades of films which is used to ioq>rove printing adhesion and lay down properties. Certain films are difficult to print and inks may not have adequate adhesion for packaging applications. J >plying Santel HR-97 to the surface of the film, prior to printing, will greatly improve ink lay down on press and final print adhesion values. 

These are immiscible with P-l-B. Low concentrations of HDPE nucleated and changed the crystallinity of P-1-B [78]. Blends with LDPE or EVA were coextruded to form heat-seal adhesives for packaging these could be reopened easily because the incompatible polymers provided low peel strength [101]. 

Chapter 8 Adhesives for packaging and paper, bookbinding, by P. Cognard Chapter 9 Polyurethane adhesives for laminating and packaging, by J. F. Lecam, Bostik-Findley... 

Viljanmaa M, Sodergard A et al (2002) Lactic acid based polymers as hot melt adhesives for packaging applications. Int J Adhes Adhes 22 219 Welsh J, Higgins J et al (2003) Evaluation of electrically disbonding adhesive properties for use as separation systems. In AIAA 2003-1436 (44th AIAA/ASME/ ASCE/AHS structures, structural dynamics, and materials conference), Norfolk, USA, pp 1-3 Yamada K, Chen T et al (2000) Chitosan based water-resistant adhesive. Analogy to mussel glue. Biomacromolecules 1 252... 

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