Flexible packaging bags leak reason analysis

Flexible packaging bags products leak usually has two kinds: one kind is the result of the design and the reason of the structure itself inevitably leak, the leak by changing the design and structure of the packaging products to solve problems; Another kind is due to the flexible packaging products produced in the process of manufacturing, transportation and other defects caused by the leakage and the leakage under the condition of without changing the structure and design, can be solved by adjusting. 1, heat sealing temperature is not the same heat sealing parts of the packaging material in the different requirements of heat sealing temperature is different, different packing speed required heat sealing temperature is different, different packaging requirements of heat sealing temperature, the longitudinal sealing and transverse sealing packaging equipment for heat sealing temperature is different, the same piece of heat sealing mode, the temperature of the different parts might not have the same, these are all problems must be considered in the packaging. For heat sealing equipment, there is a temperature control precision of the problem, the current domestic packaging equipment the temperature control accuracy is poorer, usually have & plusmn; The deviation of 10 ℃, that is to say, if we control the temperature of 140 ℃, actually in the process of packaging its temperature is between 130 ℃ to 150 ℃. Reliable method is the lowest temperature in the temperature range point sampling, and should be continuous sampling, longitudinal and can make the sample enough to cover the mold parts. 2, hot sticky note: strength difference between the hot sticky strength & ne; The heat seal strength! Refers to the flexible packaging bag heat sealing heat sealing strength of sealing strength after cooling, and the intensity of hot glue is refers to the packaging sealing parts not cooling after hot sealing when bonding strength. Using vertical bag for automatic packaging, in the horizontal sealing and sealing parts has not been cooling to be performed under the condition of filling operation, when built-in objects falling from a certain height to cross sealing parts to produce an impact, if the force is greater than the sealing parts of the hot sticky strength, has sealing parts will release again, serious when can appear torn bags. 3, durable sex difference if the flexible packaging bag punctured, formed the internal and external connected pores, leads to failure, vacuum packing causing broken bag, leakage. Several common phenomenon bag surface piercing are as follows. （ 1) By wrapping the edges between Pierce, that should be the packing bag of material is qualitative hardness is larger around the corner. （ 2) Is bags of built-in Angle piercing, to this, should choose durable material with good sex, such as BOPA, PE, CPP, etc. （ 3) Crystal point impurity in the inner membrane pierced or raise in barrier layer materials. In the packaging, packaging materials in the process of filling sealing position is often contaminated by packing materials, pollution in general is divided into liquid pollution and dust pollution. Can solve the problem of sealing parts contaminated by improving packaging equipment, the use of pollution, antistatic, heat sealing materials and other methods to solve. （ 4) Bag or the packing process, is on the edge of the sealing knife Angle puncture.