Whether it is necessary to stick car window film needs to be comprehensively judged based on usage requirements, scenarios, and the quality of the film. The following analysis will help users make decisions from three aspects: necessity, core advantages, and precautions:
1、 The core necessity of applying car window film
1. Safety protection: reduce the risk of glass breakage
-Explosion proof function: High quality window film (especially multi-layer magnetron sputtering or ceramic film) can bond broken glass together, avoiding secondary injury caused by glass fragments splashing in accidents, especially when driving at high speeds or encountering external impacts (such as stone splashing).
-Anti theft assistance: High toughness window film can increase the difficulty of glass being smashed, delay the time for thieves to damage, and provide additional protection for property inside the car.
2. Thermal insulation and cooling: improving driving comfort
-Blocking heat: By reflecting or absorbing solar infrared radiation (mainly in the heat generation band), high-quality window film can reduce 40% -70% of solar heat entering the car interior. After being exposed to direct sunlight in summer, the temperature inside the car can be lowered by 5-10 ℃, avoiding the "steam trap effect" and reducing the air conditioning load, indirectly saving fuel/electricity.
-Winter insulation: Some high-end films have bidirectional insulation function, which can reduce heat loss in the car and assist the air conditioning to quickly heat up.
3. UV protection: protects the human body and interior
-Human body protection: Ultraviolet (UV) radiation is the main cause of skin aging, pigmentation, and even skin cancer. High quality window film can block more than 99% of UV radiation (far exceeding the effect of sunscreen), reducing the damage to exposed skin from UV radiation during long-term driving.
-Interior protection: Ultraviolet radiation can cause leather cracking on the seats, plastic fading on the dashboard, and aging of the center console. Applying window film can extend the lifespan of the interior by 30% -50%.
4. Privacy and glare control
-Unidirectional perspective: Select a medium high privacy film (such as a light transmittance of 15% -30%) for the side rear gear. It is difficult to see the inside of the car from outside during the day, but the outside can be clearly observed from inside the car, protecting privacy while not affecting the observation of the rearview mirror.
-Glare suppression: The front windshield film can reduce road reflection and direct light from oncoming vehicles, reduce driving fatigue, and improve nighttime driving safety.
2、 Cautious considerations and precautions to be taken
1. Regulatory restrictions and transparency requirements
-Front windshield: According to Chinese regulations, the transmittance of the front windshield film must be ≥ 70% (otherwise it will affect the driver's line of sight and fail the annual inspection). When selecting, it is necessary to pay attention to the high transmittance film labeled "front windshield specific" (transmittance of 70% -85%).
-Side and rear gears: In some areas, there are minimum requirements for the transparency of side gears (such as not less than 50%), and films that are too dark may be punished by traffic police, especially for taxis and commercial vehicles that must strictly comply.
2. The hazards of inferior film
-Visual interference: Low priced films (such as dyed films) have false transparency labels, which can cause fog and reflection at night or on rainy days, seriously affecting driving safety; Poor quality adhesive layer is prone to aging, leading to film foaming and peeling.
-Health risks: Films containing harmful chemicals such as benzene and formaldehyde release odors at high temperatures, posing a long-term risk to human health if inhaled.
-Signal shielding: Metal film (especially multi-layer metal film) may interfere with GPS, ETC, and wireless key signals. It is recommended to choose ceramic film or nano film (without metal layer).
3. Construction and Cost
-The importance of professional construction: The film needs to be accurately cut, degreased, and drained. Non professional stores are prone to problems such as bubbles, edge curling, and glass scratches. It is recommended to choose stores with brand authorization.
-Budget range: Ordinary entry-level film (500-1500 yuan) basic insulation and UV protection; Mid end film (2000-4000 yuan) balances transparency and privacy, suitable for household cars; High end film (over 4000 yuan) has low reflectivity, high insulation, and long lifespan (5-10 years), suitable for luxury car models.