English
ULの熱収縮可能な袖は,その例外的な電気絶熱,機械的保護,および阻燃性のために産業および商業部門で広く認識されています.Underwriters Laboratories (UL) によって認定されたこれらの袖は,厳格な国際的な安全とパフォーマンス基準を満たすように設計され,安全なケーブル管理と電気絶熱のために不可欠なコンポーネントとなっています.
UL熱収縮性袖とは何ですか？
ULの熱収縮性袖は,熱に暴露すると収縮し,ワイヤー,ケーブル,または部品の周りに緊密で安全なカバーを作成するポリマーベースの管です.ポリオレフィンやPVCなどのクロスリンク材料で作られた袖は,通常2:1から4:1の収縮比を持ち,複雑な形状に正確に適合することができます.UL認証（最も一般的にUL 224）は,耐火性,介電強度,長期的な材料安定性などの厳格な安全性および性能基準の遵守を保証します。
ULの熱収縮可能な袖の主要な特徴
1. 熱収縮の行動
収縮活性化温度:90°Cから150°C
完全な収縮時間：30〜120秒
収縮比：50〜75％径向収縮
メモリ効果は,異なる几何学に正確な適合を保証します
2. 電気断熱性能
介電強度：15～30 kV/mm
容積抵抗: >10¹⁴ Ω・cm
CTI評価（UL 746A）: >600V,高電圧アプリケーションに最適
3. 機械保護
引張強度: 10-25 MPa
断断時の延長：200～500%
耐摩擦性: <100 mg weight loss after 1,000 ASTM D3389 cycles
4. Chemical & Environmental Resistance
Excellent resistance to oils, acids (pH 2–12), and solvents
Swelling: <10% after 168-hour immersion
Operating temperature: -55°C to +135°C
5. Flame Retardancy
UL 224 VW-1 compliant
Self-extinguishing within 60 seconds
LOI (Limited Oxygen Index): >28%
Heat release rate: <65 kW/m², suitable for confined spaces
Application Scenarios
Electrical & Power Systems
Cable Joints: Offers sealed 360° insulation for medium voltage up to 35kV
Busbar Coating: Ensures dielectric isolation and corrosion resistance
Transformer Terminals: Withstands Class H environments (up to 180°C)
Automotive Industry
Wire Harnessing: Replaces bulky tapes with 3:1 shrink sleeves
Battery Module Insulation: Compliant with UL 1973 for EVs
Sensor Cables: Shields wiring from oil and high-temperature fluids
Industrial Applications
Hydraulic Hose Protection: Adds abrasion resistance and color coding
Robotic Arms: Survives up to 1 million flex cycles
Explosion-Proof Boxes: Maintains seal integrity under pressure
Aerospace & Aviation
EWIS Compliance: Meets FAA FAR 25.1709 wiring safety standards
Corrosion Barrier: Prevents metal interface deterioration in composites
Weight Optimization: Specific gravity of 1.2–1.4 g/cm³, lighter than metal sleeves
Maintenance & Installation Guide
Installation Tips
Surface Cleaning: Use isopropyl alcohol to ensure surface energy >50 dynes/cm
Correct Sizing: Sleeve diameter should be 20–30% larger than the target component
Heating Method: Apply heat at 100–150°C using even, circular motion
Cooling Protocol: Allow slow cooling at ≤10°C/min to avoid cracks
Operational Maintenance
Annual Inspection: Use 10× magnification to detect microcracks
Insulation Resistance: Test with 500V megohmmeter, must exceed 100 MΩ
Thermal Aging: Monitor for discoloration or embrittlement over time
Repair & Replacement
Minor Damage: Use sealant with at least 90% surface coverage
Severe Deformation: Replace the sleeve if shrinkage exceeds 5%
UL Recognition: Always use UL-recognized (RU) components for repairs
Storage Conditions
Temperature: Store at 15–30°C
Humidity: Keep between 40–60% RH
Shelf Life: Use within 2 years following FIFO (First-In, First-Out)
UV Protection: Avoid exposure above 50 kLy/year cumulative dose
Why Choose UL Heat Shrinkable Sleeves?
Fully certified for UL 224 flame retardancy and electrical safety
Reliable performance in automotive, aerospace, industrial, and electrical applications
Backed by technical data and international standards
Provides long-lasting protection and reduces maintenance costs
Whether you're insulating power cables, protecting automotive harnesses, or managing aerospace wiring, a UL Heat Shrinkable Sleeve offers the ultimate combination of performance, safety, and durability. Contact us today to learn more or request a quote for customized sizing and color options.
