The built-in battery of cell phone jammer is the rechargeable type

Polymers, such as high density polyethylene is somewhat crystalline, crystalline performance of the nylon even more strongly, while the crystallization of POM was stronger. Left some common crystal-shaped plastic and amorphous plastic. Noting that many engineering plastics in the crystalline column, such as POM, nylon and polyester. This is because the crystalline structure of the resin tends to produce engineering applications, the required characteristics, such as: anti-chemical, oil, gasoline, grease, etc.. Mechanical strength and hardness. At high temperatures, maintain mechanical and chemical properties unchanged. There exists the area which doesn’t need to be shielded around the shielded area of  cell phone jammer .
Resistance to fatigue and repeated impact. Translucent or opaque. Polymer pyramid. This diagram shows the classification of different resin. Bottom is a commodity plastics the purpose of two features, at the top of the tower is a high-performance plastics, engineering plastics in the middle position. PEI: polyimide PEEK: polyether ketone of PES: polyphenylene ether sulfone PPS: polyphenylene sulfide. Of PAR: polyarylate the PSU: polysulfone LCP: liquid crystal polymer of HTN: high temperature nylon. PI: Polyimide PET : Poly (ethylene terephthalate) of PBT: polyethylene terephthalate. PC: Polycarbonate M-the PPO: Noryl the Nylon: Nylon ABS: acrylonitrile butadiene styrene copolymer matter. The static testing of  cell phone jammer  should be completed in every point.
POM: POM TPE: Thermoplastic polyester elastomers PS: Polystyrene PP: Polypropylene PVC: Polyvinyl Chloride of HDPE: high density polyethylene PMMA: polymethyl methacrylate (acrylic). LDPE: Low density polyethylene SAN: styrene-acrylonitrile copolymer SMA: styrene maleic anhydride. the nature of the crystal forming process have an impact, because to destroy the melting point of crystalline order of the need for additional heat, the heat is called heat of fusion. Crystalline plastics and amorphous plastic heat of fusion of the comparison in Figure below. Amorphous substances increase the temperature to see added to the heat, but increasingly presented as the liquid. Before the rise in temperature to the melting point, crystalline plastic material can maintain the strength and hardness unchanged. The small-power  mobile phone jammer needs to be installed with directional antenna in some situations.
The additional heat required to heat of fusion when melting destruction of the crystal structure, while the temperature remains constant until the melting end. With the plastic in the mold cooling, heat of fusion released from the mold out to be dissipated. However, as the temperature decreases, the molding stability and hardness, to quickly improve, the workpiece can be quickly removed from the mold. Therefore, crystalline plastic is more suitable for short-cycle molding. Compact structure means that a larger volume change from the melt to the solid crystalline plastics. Therefore, crystalline plastic amorphous plastic molding shrinkage usually the former is greater than one per cent, while the latter is about 0.5%. The testing method of  cell phone jammer is as follows.
The high crystalline plastic shrinkage makes it to estimate the complexity of the cavity size, but the benefits also contribute to the stripping of the workpiece. The typical mold shrinkage are listed in Table 2. When the melting of crystalline plastic, they tend to become highly liquid technology. Nylon resins because of their good flow characteristics known so slender and thin cross-section requirements of the application. On the other hand, people also know that they are more prone than the high viscosity of the amorphous resin flash. Some of the plastic is not subject to the influence of moisture, especially those hydrocarbons (in addition to carbon and hydrogen there is no other element) plastic such as polyethylene, polypropylene and polystyrene. Other plastic to absorb the different water, even at room temperature for absorption. The applicable location of  cell phone jammer  contains the school and jail/work camp.