热封程度也是影响复合包装袋热封强度和外观平整的关键因素。在同样的热封温度和压力下，热封时越长则热封层熔合越充分，融合越结实。但热封时间长，则形成焊缝起皱变形影响外观平整。冷却进程对热封强度的影响      冷却进程就是在必定的压力下，用较低的温度对刚刚熔融热封后的焊缝进行定型。热封压力不行，冷却水循环不畅，水循环量不行，水温太高或冷却不及时等都会致使冷却不良，然后致使热封强度下降...

      塑料袋是由塑料薄膜制成的包装袋。通常主要用以盛装物品，常见于超级市场、街市、百货公司、仓库、垃圾场等。塑料袋质轻，容易塑造，应用层面广泛，可软可硬、可湿、可干、可密封、可透气、可一次性亦可长久使用。自有塑料以来，都被研究利用塑料替代金属、木材或玻璃等物料，以减轻重量有利于方便使用、便利储存、运输或减少资源消耗。以塑料袋为例，保护货品、为食品保鲜、可承载液体，在超市货品里有大部份...

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      CPE贴骨袋因       CPE贴骨袋因为能使用的次数并不多，很多人几乎是用完就扔。但这种做法对CPE贴骨袋来说是很不明智的，因为它的诞生就是为了减少人们的随意丢弃的几率，可以长时间地重复使用。如果也像包装袋那样用完就扔，从很多方面来说都是不合适的，首先CPE贴骨袋的制作成本稍高，没必要去浪费这么结实牢固的袋子；还有就是推行使用CPE贴骨袋的意义没有得到真正的体现。     ...