UTJECAJ KORIŠTENE TEHNIKE LIJEPLJENJA NA ČVRSTOĆU UVEZA KNJIGE

Željko Hadžija1, Gorana Petković1, Suzana Pasanec Preprotić1

gorana.petkovic@grf.hr
1Sveučilište u Zagrebu Grafički fakultet, Getaldićeva 2, Zagreb, Hrvatska

Sažetak

Mjerenjem prekidne sile kidanja na Page Pull Test uređaju određuje se čvrstoća ispitivanih uzoraka bešavno uvezanih knjižnih blokova s ciljem ispitivanja utjecaja različitih tehnika izrade, odnosno lijepljenja knjižnih blokova na kvalitetu gotovog proizvoda. Ispituje se utjecaj dvije tehnike lijepljenja, lepezastog lijepljenje i lijepljenja nakon mehaničke obrade hrpta (hrapavljenja) uz dodatak knjigoveške gaze. Usporedbom dobivenih rezultata sa smjernicama FOGRA instituta broj 71.006, rangiraju se i klasificiraju ispitivani uzorci, vrši njihova međusobna usporedba te kvalitativna i kvantitativna analiza dobivenih rezultata, kako bi se sa sigurnošću definiralo koja će tehnika lijepljenja omogućiti izradu čvršćih i kvalitetnijih knjižnih blokova, ujednačeniji nanos ljepila na svim dijelovima hrpta te ponovljivost procesa. Tehnika lijepljenja koja više udovolji svim navedenim zahtjevima i pokaže bolju čvrstoću knjižnih blokova, koristi će se u daljnjim istraživanjima adhezijskih spojeva, prilikom promatranja ostalih parametara koji utječu na kvalitetu adhezije i općenito na čvrstoću knjižnog bloka.
Ključne riječi: lepezasto lijepljenje, hrapavljenje, bešavna forma uveza, čvrstoća knjižnog bloka, lijepljeni spoj

INFLUENCE OF USED ADHESIVE BINDING TECHNIQUE ON BOOKBINDING STRENGTH

Abstract

Bookbinding strength is determined by measuring the tensile breaking force on Page Pull Tester to examine the impact of used binding technique on binding strength of the end product. Two techniques, double fan and perfect binding technique (spine roughing with the addition of bookbinding gauze) are investigated. Obtained result are compared with the FOGRA institute`s guidelines number 71.006, ranked and classified, but also compared mutually with their qualitative and quantitative analyse in order to define which used technique will produce more firmer and better quality book blocks, cause more uniform adhesive application across whole book spine and ensure repeatability of the process. Bonding technique that covers a larger number of all those above listed requirements and shows a higher tensile strength, is going to be used in further research of adhesive joints – during investigation of other parameters affecting the adhesion quality and the strength of the book block in general.
Keywords: double fan binding, perfect binding, adhesive binding, bookbinding strength, adhesive joint


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