Fenomen mehanosorpcijskog puzanja ambalaže od valovitog kartona

Denis Jurečić, Tigran Jokić, Petar Miljković, Martina Friščić, Olivera Međugorac

Sažetak

Tlačno puzanje, osobito ono koje je uzrokovano kružnim izmjenama relativne vlažnosti u zraku smatra se glavnim uzrokom lomova (urušavanja) kutija. Sadržaj vlage kartona koji je u ravnoteži sa okolnim zrakom ovisi o relativnoj vlažnosti tog zraka, sastavu kartona te načinu na koji je postignuto ravnotežno stanje (primanjem ili otpuštanjem vlage). Zbog higroskopnosti celuloznih vlaknaca, pojačava se reološko ponašanje valovitog kartona, odnosno dolazi do porasta deformacija u jedinici vremena pri konstantnom tlačnom opterećenju što ima za posljedicu značajno smanjenje vijeka trajanja ambalaže. Tlačna čvrstoća je jedno od najvažnijih svojstava kutija od valovitog kartona. Kutije moraju izdržati različite manipulacije i opterećenja u skladištima te prilikom transporta i pretovara. ECT je ključni test jer direktno povezuje tlačnu čvrstoću kutije od valovitog kartona i njezine sastavnice. Cilj istraživanja je pronaći graničnu (maksimalnu) vrijednost vlage u kartonu, koja neće uzrokovati urušavanje kutija naslaganih na paleti te pronaći optimalne uvjete u sustavu uskaldištenja kutije s agrokulturom.

Ključne riječi: puzanje, tlačna čvrstoća, ambalaža, mehanosorpcija

Patrik Ervells latest collection is ironically titled “Software”ADIDAS ORIGINALS TUBULAR SHADOW. In the notes from the presentation, Ervell says he was interested in developing tension between nostalgia and sci-fi,NIKE ZOOM WINFLO 3 and even included 90s cyberpunk amongst his influences. Ervell developed this point of view by creating an imaginary software company called Idegen software systems. He then re-appropriated the company’AIR JORDAN XXXI MENs logo in several of the collection’s garments. Elsewhere,MBT TARIKI MEN mohair coats with oversized lapels made an appearance alongside mock neck tees,NIKE AIR JORDAN RETRO 5 police-inspired ribbed sweaters,MBT FORA GTX WOMEN flight bombers, and polyurethane leather coats. The setting was also suitably dystopian, and the resulting ambiance was something akin to if the creators of Deutschland 83 and Hackers met up and decided to create a collection… We mean that as a compliment.Yesterday afternoon,JORDAN CP3 IX MEN artist JR spent the day working on his latest collaborative piece with Daniel Arsham in Greenpoint,NIKE AIR MAX 90 Brooklyn,MBT KIMONDO GTX MEN NYC. Connecting the lines between art, architecture, dance and theater, Daniel Arsham has been known to subvert existing architectural structures in unconventional,NIKE CLASSIC CORTEZ NYLON playful ways; confusing and confounding the expectations of space and form. Source: Street Art News .