Coating production line
DATE：2021/5/7 9:01:38 / READ： / SOURCE：This station
Coating production line
Coating production line www.handern.comIn terms of the selection of raw materials for smart bottles, there are three categories: the first category is the materials with good moisture resistance, the second category is the materials with good properties of polylactide, PVC, polylactide and polylactide, and the second category is the materials with good oxygen resistance: polyacrylonitrile and PVC PVDC. Cell model, demand net, eval. The third kind of materials with good transparency: crystalline polystyrene, pet ( Drawing bottle) acrylonitrile copolymer, PVC, pan. Coating production line www.handern.com
When the stretch blow molding method was used to produce plastic bottles, biaxial stretch bottles were first produced by PET in the United States to package carbonated drinks. Now it has been widely used in a variety of thermoplastic materials, such as: PVC、Ps. AN、 Amorphous materials, such as PP, POM, have a wide range of thermoplasticity, and are easy to stretch. They are easier to stretch than crystalline plastics, such as pp. if the crystallization speed is too fast, the tensile effect will be destroyed. The suitable drawing temperature is PP: PP 160C ; PS: 125C ; AN: 120C ; POM: 160C; PVC; 120C; Pet: 107c. After biaxial stretching, the moisture resistance, oxygen resistance and drop strength of PET were significantly improved. Coating production line www.handern.com
DuPont uses the mixture of high barrier resin and HDPE to blow the resin bottle with good barrier property. The key to success is to strictly control the mixing conditions. The mixing conditions are not sufficient. The dispersion of barrier resin in HDPE is uneven and the particles can not be fully extended. However, if the mixing is excessive, the dispersed barrier resin particles will be crushed, When the stretched resin is interrupted, no good results can be obtained. Only when the mixture is just right and the HDPE molecular structure has many discontinuous layers, which are basically two-dimensional barrier layer structure, can good results be obtained. The barrier resin can be modified nylon or SELAR resin. Blow molding can be used in general bottle making On board production. The storage life of the container blown with high barrier resin and HDPE mixture can be increased by 140 times, and its resistance to halogenated hydrocarbon and oxygenated solvent is even better than that of fluorinated HDPE bottle. Coating production line www.handern.com
Mixed 18% The comparison of impermeability of HDPE bottles of SELAR resin to the following solvents is shown in table 41-2 below. Recently, foreign countries have developed paper / plastic composite containers, which can be used in microwave oven and electric furnace heating for two-purpose packaging containers. Their structures are: paperboard / TPX, paperboard / PET, Filled PP / foam.
Shell developed solid phase pressure forming (sppf) In this way, PP with a melting point of 170C is made into sheet, and PP with a melting point of 160C is made into sheet ° The heat resistance, low temperature resistance and impact strength of the container are greatly improved due to the biaxial stretching during the production of the container. Now shell company uses this method to produce PP / PVDC / PP high barrier coextrusion sheet and sppf method to produce high barrier container, which is suitable for aseptic packaging and hot filling. All plastic containers can also be directly used for microwave heating. Coating production line www.handern.com
Japan International can company outer layer materials pet, PP PS, PE and other materials, the middle is PVDC, and the inner layer is PE, PS and so on. The blank is injected into the mold, and then heated in the mold, blown and stretched to form a bottle shaped container. PET / adhesive resin / EVOH / adhesive resin / pet can also be used for injection molding of preforms, and then heating blow molding of biaxially stretched plastic composite bottles.
There are 19 companies in Japan producing 7-layer composite aseptic packaging paper containers, and high barrier all plastic co extrusion composite sheet thermoforming container is the current development hotspot. It has been widely used in various packaging technologies, such as deaeration packaging, aseptic packaging, N2 filling packaging, frozen packaging, etc. Coating production line www.handern.com
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