Sinofibra Logo
Back to Catalog
FABRIC / LOONG-FLEX®

SJ400-130S Ultra-Light UHMWPE UD.
Technical Profile.

The lightest premium option in the Sinofibra soft armor lineup, built for elite NIJ IIIA systems that prioritize minimum weight with top-tier fiber performance.

SJ400-130S Ultra-Light UHMWPE UD
Quick Facts
Brand NameLOONG-FLEX® SA Series (Soft Armor – UHMWPE UD)
Product CodeSJ400-130S
Armor TypeSoft Body Armor
ConstructionUD Cross-Ply Laminate
ApplicationUltra-Lightweight Premium Vest / Elite Soft Armor
Product Summary

The lightest premium option in the Sinofibra soft armor lineup, built for elite NIJ IIIA systems that prioritize minimum weight with top-tier fiber performance.

LOONG-FLEX® is part of Sinofibra's ballistic materials platform, where flexible protection, rigid composite development, and repeatable manufacturing performance are prioritized together. It supports Ballistic Protection and is suited to engineering teams that need material efficiency, scalable conversion, and clear specification control from development to production.

Key Features
  • Highest tenacity fiber in the soft UHMWPE series
  • Designed for sub-3.5 kg/m2 class NIJ IIIA systems
  • Outstanding flexibility and multi-hit capability
Applications
  • Elite soft armor
  • Military-grade ultra-light vests
  • Premium concealment armor
Technical Specifications

Organized into grouped sections so engineering teams can review product setup, physical properties, and ballistic performance more efficiently.

REV. 2026.Q2

Product Configuration

Brand NameLOONG-FLEX® SA Series (Soft Armor – UHMWPE UD)
Product CodeSJ400-130S
Armor TypeSoft Body Armor
ConstructionUD Cross-Ply Laminate
ApplicationUltra-Lightweight Premium Vest / Elite Soft Armor
Product FormRoll

Physical & Material Data

Areal Density (with film)130 g/m² ± 5 g/m²
Fabric Width1600 mm
Roll Length100 m (standard) / Customizable
Fiber TypeUHMWPE — SJ400 Grade
Fiber Tenacity42 – 44 cN/dtex
Matrix / BinderWaterborne Polyurethane (WPU)

Ballistic & Process Performance

Flexibility Rating+++
Key AdvantageHighest tenacity fiber in Sinofibra soft armor lineup; achieves NIJ IIIA at estimated <3.5 kg/m² — ideal for military-grade ultra-light soft armor systems
Resin SystemWaterborne polyurethane — low VOC, eco-friendly
Multi-hit CapabilityOutstanding
ProcessingCompatible with standard hot-press lamination
NIJ IIIA 9mm22 Plies 2.90 kg/m²
NIJ IIIA .44 Magnum25 Plies 3.25 kg/m²
Anti-Trauma Material+++
V50680 ± 15 m/s
Catalog Position
BrandLOONG-FLEX®
TemplateFABRIC
SolutionsBallistic Protection
CategoryUD Fabric
Download Center

Download the full PDF TDS for complete testing conditions, processing notes, and engineering details.

Download Full PDF TDS

Proprietary Data. Unauthorized distribution strictly prohibited.

Related Materials

Continue exploring adjacent products from the same brand or solution family.

LOONG-ARMOR®
LOONG-ARMOR® Helicopter Armor Insert
Lightweight aviation ballistic insert built for helicopter survivability, using advanced multi-layer composites and mission-specific geometry to protect critical airborne assets.
LOONG-ARMOR®
LOONG-ARMOR® Vehicle Armor Insert
Custom and pre-fabricated automotive ballistic inserts engineered for civilian and armored vehicles, combining lighter-weight UD-based armor logic with targeted protection of critical areas.
LOONG-ARMOR®
LOONG-ARMOR® B4C Ceramic Plate
Top-tier boron-carbide ceramic ballistic plate for premium hard armor programs where lower weight and higher rifle-threat protection are both critical.
LOONG-ARMOR®
LOONG-ARMOR® SiC Ceramic Plate
Silicon-carbide ceramic ballistic plate balancing weight reduction and strong multi-hit rifle protection for advanced armor systems.