ISSN:0894-3214    

DOI:10.1002/pts.2770050402

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThis paper investigates the effect of load histories (static and dynamic) on the compression strength and shock absorption properties of corrugated fibreboard boxes. Experiments were set up in the laboratory to simulate compressive forces and drops that occur during normal transportation of packaged products. The results show that static compression forces (not to failure) do not have significant influence on the compressive strength or shock absorption of corrugated boxes, and that dynamic compression forces do have a significant influence on these performance factors. This study was limited to one box size and style and suggests that more extensive research be undertaken to determine the effects of previous loading histories on a broad range of box configurations.

ISSN:0894-3214    

DOI:10.1002/pts.2770050403

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThis work presents the development of a method to measure the ethylene permeability of plastic films used in vegetable packaging, by exploiting the adsorption and desorption properties of a synthetic sodium zeolite. In order to establish the best conditions and requirements for the procedure, the ethylene adsorption and desorption by the zeolite was studied at different temperatures and partial pressures. The method was used to study the ethylene permeability of two common cling films (EVA and plasticized PVC) and shown to be both economical and accurate.

ISSN:0894-3214    

DOI:10.1002/pts.2770050404

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThe long‐term influence of electron beam irradiation on food packaging materials (OPP) was studied. After irradiating the material at dose levels of 2, 5 and 10 kGy, we have shown a partial or complete disappearance of the antioxidant (Irganox 1010 and Irgafos 168) over time and a release of five new compounds resulting from antioxidant degradation. All of these degradation compounds have been identified and quantitatively analysed in relation to post‐irradiation time and absorbed dose. These results allow an explanation of the antioxidants' behaviour during storage of the irradiated polypropylene at room temperat

ISSN:0894-3214    

DOI:10.1002/pts.2770050405

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractThe influence of electron beam irradiation on antioxidants present in food packaging materials (OPP and LDPE) was studied. After irradiating the materials at dose levels of 2, 5,10 and 25 kGy, we have shown a partial disappearance of the antioxidant (Irganox 1010, Irganox 1076 and Irgafos 168) and a release of three compounds resulting from the antioxidants degradation related to the irradiation dose. Two of these degradation compounds have been analysed quantitatively: the 2,4‐di‐tert.‐butyl‐phenol and the 2,6‐di‐tert ‐butyl‐p‐benzoquinone. The third compound is a phosphate resulting from a phosphite stabili

ISSN:0894-3214    

DOI:10.1002/pts.2770050406

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractA few years ago it would have been difficult to justify the development of a digital proofing system without reference to a filmless environment.To go from original to plate, or cylinder, is not viable commercially without a method of hard copy approval before the production run. However, the technologically sophisticated concept of direct‐to‐plate publishing is far from being the only example of the need for digital proofing.Pre‐press companies have embraced electronic methods of working extensively and their adoption is growing rapidly in packaging production, advertising, graphic design and publishing. The demand for controlled, colour, hard copy is large enough to justify attention at several l

ISSN:0894-3214    

DOI:10.1002/pts.2770050407

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

摘要:

AbstractDifferent types of polystyrene used in packaging were tested for styrene monomer migration into corn oil. Several blends of general‐purpose polystyrene with different amounts of high‐impact polystyrene demonstrated a linear increase of migration of styrene with increasing amount of high‐impact polystyrene in the polymer. Faster migration was found for higher exposure temperatures. Migration depended linearly on the content of residual styrene monomer in the po

ISSN:0894-3214    

DOI:10.1002/pts.2770050408

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:0894-3214    

DOI:10.1002/pts.2770050409

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:0894-3214    

DOI:10.1002/pts.2770050410

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY

ISSN:0894-3214    

DOI:10.1002/pts.2770050401

出版商:John Wiley&Sons, Ltd    

年代:1992

数据来源: WILEY