Introduction of cell phone protective case

First, what is silicone, TPU, PC

1.Silica gel
Silicone is a highly active adsorbent material, is an amorphous substance, its chemical molecular formula is mSiO2-nH2O; in addition to strong alkali, hydrofluoric acid does not react with any substance, insoluble in water and any solvent, non-toxic, tasteless, chemically stable.
Advantages: easy to use, can be dustproof, anti-staining fingerprints, easy to handle; soft and hard moderate, the cell phone silicone cover will have a certain degree of softness to protect the phone close to the body; cell phone silicone cover a large variety of different specifications of the pattern, you can change different cell phone silicone cover every day or on a regular basis to enrich your life. Waterproof.

2.TPU
Thermoplastic polyurethane elastomer rubber. Mainly divided into polyester-type and polyether-type points, in daily necessities, sporting goods, toys, decorative materials and Other fields are widely used, halogen-free flame-retardant TPU can also replace the soft PVC in order to meet the environmental requirements of more and more areas.
Advantages: wide range of hardness, wear-resistant, oil-resistant, transparent, good elasticity.
Disadvantages: easy to degenerate, easy to turn yellow

3.PC
PC is the abbreviation of polycarbonate, referred to as PC engineering plastics, PC material is actually what we call one of the engineering plastics, as a material widely used worldwide, PC has its own characteristics and advantages and disadvantages, PC is a comprehensive performance of excellent amorphous thermoplastic resins in all corners of your life can be seen in the shadow of the PC plastics, large-scale industrial production and easy to process features The characteristics of mass industrial production and easy processing also make it extremely inexpensive.
Advantages: excellent electrical insulation, extensibility, dimensional stability and chemical resistance, high strength, heat resistance and cold resistance, but also has the advantages of self-extinguishing, flame retardant, non-toxic, colorable, etc., low price.

Disadvantages: not scratch-resistant, not resistant to strong acid, not resistant to strong alkali, not resistant to ultraviolet light

II. Transparency
1. Silicone
Silicone has high transparency.

2.TPU
From the outside, TPU can be made very transparent.

3.PC
High transparency, PC material protective case is also very good light transmission. However, the high transparency of the PC protective shell production process requirements are relatively high, translucent PC shell is still relatively common.

Third, processing and molding
1.Silicone
The use of liquid silicone material through the secondary injection molding process, the surface feel delicate, waterproof and non-slip, because the liquid silicone has excellent elasticity and memory, so that the cool case to deal with the impact of the bump can be realized efficiently cushioning, preventing damage to the phone at the same time, compared with the hard plastic shell, itself is not easy to damage. It can be said that the use of liquid silicone material cool case in the physical protection is a higher level.

Surface treatment:
Monochrome cell phone cover, this kind of cell phone cover is only the deployment of silicone color, with the shape of the mold to make a three-dimensional plane of the silicone cell phone cover, generally need to be post-processing, such as: silkscreen, color printing, digital printing, water transfer, thermal transfer, laser engraving, oil spraying and so on.

2.TPU
TPU belongs to the plastic category, the product is injection molding process to do out, that is, a grain of plastic rice after heating and melting, with the barrel of the gun shot into the plastic mold and made products.

Surface treatment: plating, spraying, printing, etc.

3.PC
PC can be injection molding, extrusion, molding, blow molding, thermoforming, printing, bonding, coating and machining, the most important processing method is injection molding.

Surface treatment:
Vacuum plating process: plating on the PC shell, plating after carving some patterns, texture is good, but after the vacuum plating after one to UV varnish.

PC spraying process: you can spray the feel of rubber oil, this feel also has a lot of people like, and then a little more complex is in the colored (transparent red, transparent blue, transparent yellow, etc.) transparent PC shell on the spray a layer of primer, and then laser engraving of some patterns, and finally over a rubber paint, this product appears to be very high-grade.

PC water transfer, thermal transfer process: in the PC shell to do some transfer on the pattern pattern, and then spray UV varnish, or have a soft feel of the rubber oil.

Transfer after spraying UV varnish, hand pinch, the surface of the UV varnish is easier to crack, so the transfer process is best to choose to spray rubber paint, soft touch, matte surface, do a good job of the process, it will also look very high-grade. The disadvantage is that the surface is not scratch-resistant, if a partial loss of paint, sparingly along the place where the paint will easily fall off more and more. The advantage of transfer printing is that the pattern is very colorful.