| 摘要 |
<p>The present invention consists in a laser microperforation device used for perforating different linear patterns with micrometric sizes in polyamide or nylon bags used as packing for fruits and vegetables (products), which control the atmosphere thereof when these are under controlled refrigeration conditions. The laser system is able to perform perforations of different diameters, and arrange them in different positions lengthwise a linear working area, the system being assisted by a ceramic of high thermal conduction, which accumulates heat for an instant due to the contact with the laser energy, when this ceramic is brought into contact with the bag, for a predetermined time, this may transfer the heat and change the states of the matter of the bag from solid to vapor or gas. The packing with microperforations is useful for promoting and extending the shelf life of the aforesaid food products, upon controlling the values and rates of transmission or breath of O2, CO2 and ethylene p roduced in the periods of post-harvest and final consumption.</p> |
