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Come prevenire il fallimento dell'adesione della silicone con rivestimenti in glassine

Creato il 07.03
为了防止与玻璃衬垫的硅胶粘附失效，您需要解决根本原因：硅胶释放涂层质量差、环境因素、材料不兼容和不当处理。以下是逐步指南：

1. 确保高质量的玻璃纸和硅胶涂层

  • Supplier Qualification: Work with reputable glassine suppliers who specialize in PSA (Pressure-Sensitive Adhesive) liners. Request certification of coating consistency.
  • Coating Weight: 验证硅胶涂层重量（通常为0.8–1.2 g/m²）。涂层不足的衬垫会导致粘连。
  • Curing: 确保硅胶完全固化。固化不完全会导致粘附或转移问题。

2. 控制存储条件

  • Temperature/Humidity: Store liners at 20–25°C (68–77°F) and 40–60% RH. High humidity swells paper, increasing adhesion; low humidity makes silicone brittle.
  • Avoid Extremes: Never store near heat sources, windows, or in damp areas. Use climate-controlled warehouses.

3. 防止增塑剂迁移

  • Test Compatibility: If your adhesive contains plasticizers (e.g., PVC tapes), test for migration by aging samples (e.g., 60°C for 7 days). Look for liner sticking or gloss changes.
  • Barrier Coatings: Use glassine with clay/barrier coatings to block plasticizers.

4. 优化生产处理

  • Avoid Over-Compression: Don’t stack rolls/pads excessively. High pressure can force adhesive into the liner.
  • Minimizar el tiempo de permanencia: No deje los revestimientos recubiertos de adhesivo bajo presión más tiempo del necesario.
  • Clean Handling: Wear gloves to avoid transferring oils/sweat to liners.

5. 环境管理

  • Production RH Control: Maintain 40–60% RH in converting areas. Use dehumidifiers in humid climates.
  • Temperature Stability: Avoid sudden temperature shifts during production/transport.

6. 粘合剂/衬垫兼容性测试

  • Peel Force Testing: 测量释放力（例如，FINAT FTM 10）。目标值：
    • Easy release: 5–20 g/in
    • Medium: 20–60 g/in
    • Tight: >60 g/in
  • Aging Tests: 加速老化（50°C，70% RH，72小时）以模拟长期存储。

7. 解决现有故障

  • If Sticking Occurs:
    • Gradually increase silicone coating weight.
    • Switch to a higher-slip silicone (e.g., solventless platinum-cured).
    • Add release additives to the adhesive (consult your adhesive supplier).
  • If Silicone Transfers: Reduce tension during unwinding; check for abrasive contact points.

8. 特殊情况

  • High-Temp Applications: Use liners rated for your adhesive’s max temperature.
  • Medical/Food Grade: Ensure liners meet FDA 21 CFR or EU 10/2011 compliance.

Proactive Measures:

  • Audit Suppliers: Review their QC data for coating uniformity, cure, and contamination.
  • Document Specifications: Define exact requirements (coating weight, RH tolerance, etc.) in purchase orders.
  • Sample Testing: Always test new liner batches before full production runs.
通过优先考虑衬纸质量控制、环境管理和严格的兼容性测试，您将最小化粘附失败。与您的玻璃纸和粘合剂供应商密切合作——他们可以提供技术数据和量身定制的解决方案。对于关键应用，考虑升级到PET衬纸以获得更优越的尺寸稳定性。
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Ray
Ferrill
Evelyn