Pvc frosted transparent box is a kind of display box in the box, using PVC transparent material made of the box. It has the features of increased user experience, long-lasting packaging, moisture-proof, waterproof, high toughness, strong transportation safety, and improved product quality.
The chemical structure of pvc matte transparent box can be divided into aliphatic polysulfone and aromatic polysulfone. The oxygen in polysulfone resin structure has highly resonant diaryl sulfone group, sulfur atom is in complete oxidation state, and the sulfone group has high resonance. The polysulfone resins have excellent oxidation resistance and heat resistance, and have excellent melting stability. These are the processing properties required for high temperature molding and extrusion molding.
The main molding properties of PSF include: 1. Amorphous materials, moisture absorption, water absorption rate of 0.2% to 0.4%, must be fully dried before use, and to prevent reabsorption. Guarantee moisture content below 0.1%. 2. Molding performance similar to PC, poor thermal stability, began to decompose at 360 °C. 3. Poor flow, fast cooling, suitable for high temperature and high pressure molding. The mold should have sufficient strength and rigidity, set up the cold material well, the flow channel should be short, and the gate size should take 1/3~1/2 of the wall thickness of the plastic part.4. To reduce the internal stress generated by the injection products, the mold temperature should be Control at 100~140°C. After forming, annealing treatment such as glycerin bath annealing, 160°C, 1~5min, or air bath 160°C, 1~4h can be adopted. Annealing time depends on the size and wall thickness of the product. 5. In the molten state close to Newtonian body, similar to polycarbonate, the fluidity is relatively sensitive to temperature, so when the molding is mainly through improving the temperature to improve the processing of fluidity.
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