Test procedures & certificates
IP67 Waterproof
30 minutes at 1m depth
IP68 Waterproof
Continuous 2m depth
MIL-STD-810H Drop test
26 drops from 1.2m onto concrete
ASTM D4169 Vibration
Transport vibration simulation
CE Compliance
EU safety directive
RoHS 2/3
Hazardous substance restriction
REACH
EU chemical regulation
ISO 9001:2015
Quality management system
BSCI Audit
Social compliance audit
AQL 1.0 / 2.5
Sampling per ISO 2859-1
Salt spray test
96h ASTM B117
UV resistance
500h Xenon arc (ASTM G155)
Quality control process
Incoming inspection
Material certificates, dimensional checks, visual inspection.
In-process control
First-article inspection, SPC, wall thickness, weld checks.
Final inspection
AQL 1.0/2.5, functional test, packaging check.
Pre-shipment audit
Packaging, labeling, container loading.
About Kexin New Material (客信新材料)
Kexin New Material (Guangdong) Co., Ltd. (客信新材料（广东）有限公司) has been a direct OEM/ODM manufacturer of protective cases since 2010, headquartered in Guangdong, China. Our production line spans 12,000 m² with 6 PP/ABS injection production lines, 2 aluminum CNC production lines, 1 foam CNC line, and 2 assembly lines. Annual capacity: 1.5 million cases. ISO 9001:2015 and BSCI certified.
AQL sampling plan (ISO 2859-1)
| Lot size | Sample size | AQL 1.0 (krit.) | AQL 2.5 (maj.) |
|---|---|---|---|
| 26–50 | 8 | 0 | 1 |
| 51–90 | 13 | 0 | 1 |
| 91–150 | 20 | 0 | 2 |
| 151–280 | 32 | 1 | 3 |
| 281–500 | 50 | 1 | 4 |
| 501–1.200 | 80 | 2 | 6 |
| 1.201–3.200 | 125 | 3 | 8 |
| 3.201–10.000 | 200 | 5 | 12 |
| 10.001+ | 315 | 7 | 18 |
AQL results from 2024–2025 (actual batch data)
From 1,247 inspected batches in 2024–2025 (1.85 million cases total). Below: aggregated quality KPIs from real OEM orders for defense, medical and industrial MRO customers.
| KPI | Target | Actual 2024–2025 | Status |
|---|---|---|---|
| AQL pass rate (batches without rejection) | ≥ 97.0% | 98.6% (1,229 / 1,247) | ✅ |
| Critical defects (AQL 1.0) | 0 / Charge | 0 across all 1,247 batches | ✅ |
| Major defect rate (AQL 2.5) | ≤ 1.0% | 0.62% (7 batches) | ✅ |
| IP67 test pass (sample per batch) | ≥ 99.5% | 99.8% | ✅ |
| MIL-STD-810H drop test pass | ≥ 99.0% | 99.4% | ✅ |
| Customer complaint rate (DPPM) | ≤ 500 | 187 DPPM | ✅ |
| On-time delivery (OTD) | ≥ 95.0% | 97.3% | ✅ |
3 real case studies — AQL rejection fixed
Case 1: German defense agency (order 2024-Q2, 8,000 cases)
Problem : First article batch of 1,200 cases showed 1.8% major defects (uneven O-ring seal, 22 units) — exceeded AQL 2.5.
Action : 8D report, O-ring tool reground, SPC control chart at assembly line, 100% O-ring seal check at final inspection.
Result : Subsequent batch (6,800 cases): 0 critical, 0.3% major defect rate, AQL 2.5 met. Order value €740,000 saved.
Case 2: US medical device OEM (order 2024-Q4, 12,000 cases)
Problem : Customer required FDA-compliant cleaning; AQL sample found 3 cases with residual particles > 0.5 mm (major defect).
Action : ISO Class 8 (ISO 14644-1) cleanroom final assembly introduced, particle-free gloves and ESD protection, visual check under 5,000 K LED ring light.
Result : Next batch (10,000 cases) 0 particle defects, FDA inspection report passed, 2025 framework agreement signed for 50,000 cases/year.
Case 3: Dutch drone integrator (order 2025-Q1, 3,500 cases)
Problem : Pre-audit found 4 cases with wall thickness 2.4 mm (spec 2.6 mm ± 0.1) — within tolerance but IP-test risk.
Action : Injection temperature tightened (+5 °C), cooling time +3 s, AQL sample raised to 32 (from 13), 100% ultrasonic wall thickness at critical points.
Result : 3,500 cases 100% passed IP67 test, wall thickness now 2.55–2.68 mm, Cpk 1.67 (excellent capability).
FAQ
Which certificates do you hold?
CE, RoHS 2/3, REACH, ISO 9001:2015, BSCI. MIL-STD-810H test reports and ITAR compliance on request.
What is your AQL rate?
AQL 1.0 for critical defects, AQL 2.5 for major defects, per ISO 2859-1.
Can I audit your factory?
Yes, factory audits can be arranged by appointment. We also support third-party BSCI and ISO audits.
Which IP ratings do you test?
IP54, IP65, IP67 (30 min / 1 m) and IP68 (continuous 2 m) per IEC 60529. Per-lot test report on request.
Which industries require MIL-STD-810H?
Defense, government, aerospace, medical, industrial MRO. We provide per-lot test report.
Manufacturing standards we follow
- ISO 9001:2015 — Quality management system with annual external audits.
- BSCI — Workplace social compliance (audit report on request).
- PPAP / FMEA — available for defense and automotive OEM customers.
- RoHS 2/3 / REACH — Material compliance for EU market.
- Factory audit program — annual BSCI and ISO audits, customer factory visits welcome.
📖 See how these standards perform in real applications: application cases from 20+ industries with IP rating and load data.
Continuous improvement (PDCA)
- Plan — annual quality goals with KPIs (AQL rate, on-time delivery, complaint rate).
- Do — standard operating procedures, training, tool maintenance.
- Check — AQL sampling, customer feedback, supplier audits.
- Act — corrective actions, 8D reports, continuous improvement.
Models with certified protection
These models have passed IP67/IP68 testing: