The first layer, outer layer: main purpose is to protect the printed matter not be destroyed, to avoid dust pollution, transparency, good antistatic film can be used. This material is mostly transparency excellent antistatic LDPE film, the thickness of 40 microns, paperless lu: su composite material, outside protective layer thickness is 100 microns.

 

The second floor, printing layer: the main purpose is to printing (printing) is design, trademark and instructions. The material is PE or paper. An advantage of using the paper is that the white degree is high, above 90%, and the printing effect is good, bright colors, beautiful; But poor resistance to liquid permeability, although the resin impregnation process, but will still be some penetration, the printing surface easily. At present many hose no longer use paper, and used to add white masterbatch blow molding and white film, PE strength is higher than paper. Because is non-polar PE material, should be done before the printing corona treatment, can improve the PE film surface, improve the PE film with printing ink adhesion. This layer thickness, such as the use of paper can be used more than 120 g/m2 white board paper, such as using the white PE film is used 50 ~ 60 mu m white LDPE film.

 

The third layer, barrier layer: this is a layer of aluminum foil, foil good blocking the role of water, gas, steam, solvents, also can cut off the light. In composite hose is the most important barrier property, mainly provided by this layer, the layer thickness is 10 ~ 40 microns.

 

The fourth layer, heat sealing pipe layer: this layer provides heat sealing, can make composite sheet of circular tubular hose with discharging mouth. This layer of another important role is to prevent the contents of the hose, stop the contents to the soft tube wall penetration. , therefore, should not only have good heat sealing, also have certain resistance to oil, barrier property. The inner most use in more than 50 microns thickness of LDPE, also can use EVA or LDPE film.

 

The entire production process can be used to dry compound method and extrusion coating after legal or extrusion (for all eco tube packaging) approach to production. The structure can be LDPE and PP (mask) 40 ~ 100 mu m/is more than 120 g/m2 of printing poster board or 50 ~ 60 mu mLDPE white film / 10 ~ 40 mu mA1 / LDPE50 microns above, the hose total thickness is more than 150 to 200 microns.