What kind of adhesive is used for car bumper bonding?
2 Answers
Car bumpers are bonded with structural adhesive. The functions of a bumper include: 1. Providing safety protection; 2. Absorbing external impacts; 3. Protecting pedestrians; 4. Enhancing aesthetics; 5. Improving vehicle aerodynamics. A bumper consists of an outer panel, cushioning material, and crossbeam. The painting process for a bumper is as follows: 1. Clean the bumper thoroughly; 2. Dry off moisture; 3. Apply surface spray; 4. Sand and wipe clean; 5. Flame treatment; 6. Electrostatic dust removal; 7. Perform spray painting; 8. Apply gray primer; 9. Spray with pre-mixed color paint, followed by clear gloss paint, then polish after baking.
Last time my car's bumper got cracked, I decided to fix it myself. The first choice was epoxy adhesive, especially the two-component type, which offers high strength and solid bonding, specifically designed for plastic parts. The steps are simple: first, thoroughly clean the damaged area with alcohol or a dedicated cleaner to remove grease, then evenly apply the adhesive and press firmly. Wait for four to six hours for it to cure, and then take it out for a test drive. Be careful not to use ordinary universal glue, as its adhesive strength is insufficient and prone to loosening; opt for reputable brands like 3M or Loctite for guaranteed quality. Curing time is affected by temperature and humidity, faster in summer and slower in winter, so patience is key. If the bond isn't strong enough, it might come off during high-speed driving, posing safety risks; it's best to have a temporary support for fixation. DIY repairs save money, but for complex cracks, it's safer to go to a professional shop.
