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Surface hardness of PC resin

1. The advantage of PC is its high strength, which refers to its tensile strength and impact strength, but its surface hardness is indeed not high, much lower than PMMA. This indicator is usually used in the lens industry. The ordinary molded surface of PMMA can reach 1H, and after hardening it can reach more than 4H. The surface hardness of ordinary PC is about 2B, and after hardening it can only reach about 2H. Few people use this standard to measure ABS. Isn't this the material for making lenses?

2. PC material eyeglass lenses have excellent impact resistance, but their surface hardness is low and they are easy to scratch. Daily use requires a coating process to improve durability. Impact resistance The impact resistance of polycarbonate (PC) material is more than 10 times that of ordinary resin lenses. It can withstand impact energy of about 80-100 joules. It meets the U.S. FDA impact resistance standards and is suitable for sports protection or children.

3. Poor surface hardness: PC materials have low surface hardness, poor wear resistance, and are easily affected by scratches and wear, thus affecting their light transmittance and aesthetics.

Why choose PC for car headlight shades?

1. Summary: PC materials have become the mainstream choice for automobile headlight lampshades due to their high light transmittance, impact resistance, flame retardant, processing convenience and safety.

2. It has excellent impact resistance and can effectively resist external impacts such as gravel impact and is not easy to rupture. At the same time, PC materials also have good weather resistance and can maintain stable performance under different temperature and climatic conditions. Application: Widely used in automobile headlights, taillights and other parts. For example, the headlight shades of some high-end models are made of PC material to ensure good lighting and safety.

3. The glass covers of the headlights and taillights of general vehicles are injection molded of high-grade polycarbonate (also called PC, resin eyeglass lenses are this material). Polycarbonate has high hardness, high strength, high toughness, ultraviolet resistance and good light transmission. Therefore, the authentic lampshade does not change the color and has good transparency after long-term use. High-quality light bulbs have good light distribution and high brightness, while inferior light bulbs have insufficient brightness, poor focus, and short range. When overtaking, the driver will have optical illusions and are prone to accidents.

4. In addition, it is inherently resistant to sun. When exposed to the sun for a long time, it will not easily turn yellow even if it is used for five years, and it can maintain good light transmission and appearance. Twenty years ago, car headlight lampshades were all made of glass. Due to the limited light transmittance of glass, in order to achieve better astigmatism effect, patterns needed to be engraved on the lampshades.

iPhone transparent shell and back plate material

The back material of the iPhone's transparent shell is usually polycarbonate (PC) or thermoplastic polyurethane (TPU). Polycarbonate (PC): This material has high transparency and can clearly show the appearance of the phone. It has high hardness and good wear resistance. It can resist scratches to a certain extent and protect the back plate of the phone. At the same time, PC material has good toughness, is not easy to break, and can withstand certain external impact during daily use.

The back material of the iPhone's transparent case is usually polycarbonate (PC) or silicone. Polycarbonate has good transparency and can clearly show the details of the appearance of the mobile phone. It has high hardness, certain resistance to falling, is not easy to scratch, and can better protect the mobile phone. For example, some iPhone cases that are mainly thin and transparent in texture often use this material to make the appearance of the phone authentic.

The main materials for the transparent shell and back plate of the iPhone include PC material, acrylic material and hard shell polycarbonate material. PC material is a commonly used material for some transparent phone case. Some products use PC material throughout the body, including the back panel, frame and bottom. This material has the characteristics of non-yellowing and can keep the appearance of the transparent shell clean for a long time, providing stable and lasting protection for the mobile phone.

The phone case is synthesized from two plastic materials: polycarbonate (PC) and TPU.

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