자전거 헬멧 관리 & 유지 보수 안내서 ‌& 최적의 성능과 안전 보장

자전거 헬멧 관리 & 유지 보수 안내서 ‌& 최적의 성능과 안전 보장

1. Cleaning Protocol‌

Surface Cleaning‌: 온화한 비누로 약화 된 부드러운 마이크로 화이버 천을 사용하십시오 (ph 6.5-7.5) to wipe the polycarbonate shell. Avoid abrasive sponges or solvents (e.g., acetone) that degrade EPS foam impact absorption properties.

Ventilation Channels‌: Remove dust from vents using compressed air (≤0.3 MPa) to prevent airflow obstruction.

Retention System‌: Clean adjustable straps with diluted isopropyl alcohol (70% concentration) to sanitize without corroding buckle mechanisms.

2. Storage Requirements‌

Temperature Control‌: Store in dry environments (humidity <60%) at 10°C–25°C. Prolonged exposure to >50°C (e.g., car trunks) may compromise EPS foam structural integrity (ASTM F1447 Section 8.3).

Pressure Avoidance‌: Never stack heavy objects (>2 kg) on helmets. Use manufacturer-provided storage hooks to prevent shell deformation.

3. Damage Inspection ‌

Critical Checkpoints‌:

Shell Cracks‌: Examine for fractures >0.5 mm using LED light reflection tests.

Foam Compression‌: Measure EPS liner rebound rate with a durometer (acceptable range: 85–95 Shore A).

Strap Elasticity‌: Replace if strap elongation exceeds 15% of original length under 10 N tension (EN 1078:2012 Annex B).

4. Replacement Cycle ‌‌

Impact Events‌: Immediately retire helmets after ANY collision, including minor drops from >1.5 m height (CPSC 16 CFR 1203).

Aging Threshold‌: Replace every 5 years regardless of usage, as UV exposure and oxidation reduce material strength by 30–40%.