中封制袋机主要是用于生产水泥编织袋、化工原料、肥料、粮食等的中封袋子。 该机组由8种型式机台组成，以PP(PE)塑编淋膜布或三合一纸塑编织布和纸袋纸为基材，经放送、印刷、衬纸、粘胶（打孔）、成筒、粘边、切袋、输送、叠纸、计数在一个工艺流程中连续完成；可生产折边、不折边、平口或自封阀口的中封复合袋、纸塑组合袋及塑编圆筒袋。
Medium sealing bagging machine is mainly used to produce cement woven bags, chemical raw materials, fertilizers, grain and other medium sealing bags. This unit is composed of 8 types of machines, with PP (PE) plastic woven film cloth or three-in-one paper-plastic woven cloth and paper bag paper as the base material, which can be continuously completed in one technological process through delivery, printing, lining, viscose (punching), cylinder forming, edge sticking, bag cutting, conveying, paper folding and counting. It can produce folding, non-folding, flattening or self-sealing. The middle sealing compound bag, the paper-plastic combination bag and the plastic woven cylinder bag of the valve mouth.