battery raw material Custom Color Highland Barley Paper
(18650/21700/26650/32650) – Adhesive, High-Temperature Resistant
In lithium battery pack assembly (especially for cylindrical cells
like 18650, 21700, 26650, and 32650), reliable insulation and heat
resistance between cells are critical to prevent short circuits and
ensure safety. Our Highland Barley Paper with Adhesive solves the
limitations of ordinary insulating papers: made from natural
highland barley fiber, it combines strong high-temperature
resistance, excellent dielectric strength, and easy application via
pre-applied adhesive—making it ideal for spacing and insulating
cylindrical battery cells in EVs, power tools, energy storage
systems, and consumer electronics.
1. Core Advantages: Why Choose Highland Barley Paper with Adhesive?
| Advantage | Key Benefit for Battery Pack Manufacturers |
|---|
| Multi-Cell Compatibility | Pre-cut sizes (or roll form) for 18650/21700/26650/32650
cylindrical cells—no extra trimming needed, saving assembly time. |
| Extreme High-Temp Resistance | Withstands continuous use at 180℃ (short-term up to 220℃),
outperforming standard paper insulators (typically ≤120℃). |
| Strong Adhesive Backing | High-tack acrylic adhesive ensures secure bonding to battery cells;
resists peeling even under vibration or temperature cycles. |
| Natural & Eco-Friendly | Made from renewable highland barley fiber—non-toxic, halogen-free,
and compliant with environmental standards (RoHS/REACH). |
| Thin Yet Durable | 0.08mm–0.2mm thickness saves space in compact battery packs;
tensile strength ≥30MPa to resist tearing during assembly. |
2. Technical Specifications (By Battery Cell Type)
| Specification | For 18650 Cells | For 21700 Cells | For 26650 Cells | For 32650 Cells |
|---|
| Compatible Cell Size | 18mm*65mm (diameter*length) | 21mm*70mm | 26mm*65mm | 32mm*65mm |
| Material | Natural highland barley fiber + acrylic adhesive | Natural highland barley fiber + acrylic adhesive | Natural highland barley fiber + acrylic adhesive | Natural highland barley fiber + acrylic adhesive |
| Standard Thickness | 0.1mm / 0.15mm | 0.1mm / 0.15mm | 0.15mm / 0.2mm | 0.15mm / 0.2mm |
| Temperature Resistance | Continuous: 180℃; Short-term: 220℃ | Continuous: 180℃; Short-term: 220℃ | Continuous: 180℃; Short-term: 220℃ | Continuous: 180℃; Short-term: 220℃ |
| Adhesive Performance | Peel strength ≥0.5N/cm (to aluminum); Service temp: -40℃ to 180℃ | Peel strength ≥0.5N/cm (to aluminum); Service temp: -40℃ to 180℃ | Peel strength ≥0.6N/cm (to aluminum); Service temp: -40℃ to 180℃ | Peel strength ≥0.6N/cm (to aluminum); Service temp: -40℃ to 180℃ |
| Electrical Insulation | Dielectric strength ≥10kV/mm; Volume resistivity ≥10¹⁴Ω·cm | Dielectric strength ≥10kV/mm; Volume resistivity ≥10¹⁴Ω·cm | Dielectric strength ≥12kV/mm; Volume resistivity ≥10¹⁴Ω·cm | Dielectric strength ≥12kV/mm; Volume resistivity ≥10¹⁴Ω·cm |
| Standard Form | Roll (50m/roll, width 20mm) or pre-cut sheets (20mm*70mm) | Roll (50m/roll, width 24mm) or pre-cut sheets (24mm*75mm) | Roll (50m/roll, width 28mm) or pre-cut sheets (28mm*70mm) | Roll (50m/roll, width 34mm) or pre-cut sheets (34mm*70mm) |
3. Application Scenarios
Our Highland Barley Paper with Adhesive is designed to solve
insulation challenges in cylindrical battery pack assembly across
industries:
- Consumer Electronics: 18650 battery packs for power banks, laptops, and
flashlights—thin design saves space in compact devices.
- Power Tools: 21700/26650 packs for cordless drills, grinders, and leaf
blowers—high-temp resistance handles heavy-duty discharge heat.
- Electric Mobility: 26650/32650 packs for e-scooters, electric bikes, and portable EV
chargers—adhesive resists vibration during rides.
- Energy Storage: 32650 packs for home solar storage and backup power
systems—eco-friendly material meets green energy standards.
4. Customization Options
We offer flexible customization to match your specific battery pack
design and production needs:
| Customization Item | Available Options |
|---|
| Dimensions | Custom roll widths (10mm–100mm) and pre-cut sheet sizes (per cell
specs) |
| Thickness | 0.08mm–0.3mm (adjustable for insulation/spacing requirements) |
| Adhesive Type | Standard acrylic adhesive (high temp) or silicone adhesive (for
-60℃ to 200℃ extreme environments) |
| Packaging | Standard: 50m/roll in moisture-proof bags + cartons; Custom: Small
rolls (10m/roll) for sample testing |
5. Quality Assurance & Order Support
- Certifications: Compliant with RoHS, REACH, and UL 94 V-0 (flame retardant)—safe
for electronics and consumer products.
- Testing Reports: Each batch undergoes high-temperature resistance, adhesive
strength, and insulation performance testing—reports available on
request.
- MOQ & Lead Time: Low MOQ of 5 rolls (or 500 pre-cut sheets) for standard sizes;
ships within 2–3 days. Custom orders deliver within 5–7 days.
- After-Sales: Free samples (1m roll or 10 pre-cut sheets) for testing; 6-month
warranty for quality issues (e.g., adhesive failure, excessive
thickness tolerance).
Need help confirming the right thickness or size for your
18650/21700/26650/32650 battery pack? Send us your cell layout—our
team will recommend the optimal solution. Contact us today for a
quote!
