真空(kong)(kong)(kong)充氣(qi)(qi)包裝的主要作用除真空(kong)(kong)(kong)包裝所(suo)具備的除氧(yang)保(bao)質功能外，主要還有(you)(you)抗(kang)壓、阻氣(qi)(qi)、保(bao)鮮等作用，能更有(you)(you)效地(di)使食(shi)(shi)(shi)品(pin)(pin)長(chang)期保(bao)持原有(you)(you)的色、香、味、形及營養價值。另外，有(you)(you)許多(duo)食(shi)(shi)(shi)品(pin)(pin)不適宜采用真空(kong)(kong)(kong)包裝而必須(xu)采用真空(kong)(kong)(kong)包裝機真空(kong)(kong)(kong)充氣(qi)(qi)包裝。如松脆易碎食(shi)(shi)(shi)品(pin)(pin)，易結塊食(shi)(shi)(shi)品(pin)(pin)，易變形走油食(shi)(shi)(shi)品(pin)(pin)，有(you)(you)尖(jian)銳棱角或硬度(du)較高會刺(ci)破包裝袋的食(shi)(shi)(shi)品(pin)(pin)等。食(shi)(shi)(shi)品(pin)(pin)經(jing)真空(kong)(kong)(kong)充氣(qi)(qi)包裝后(hou)，包裝袋內充氣(qi)(qi)壓強大于包裝袋外大氣(qi)(qi)壓強，能有(you)(you)效地(di)防止食(shi)(shi)(shi)品(pin)(pin)受壓破碎變形并不影響包裝袋外觀及印(yin)刷裝潢。