Product Description

Dow 1857 is a ionomer resin supplied by POLYVALA (Shanghai Polyvala Plastics Co., Ltd.). It belongs to the 沙林SURLYN family — 锌型（zn）三元共聚离聚物（乙烯 - 甲基丙烯酸 - 丙烯酸酯）.

Key Specifications

  • 密度 0.940 g/cm³ MFR (190°C/2.16kg) 4.0 g/10min 熔点 (DSC) 87°C

Typical Applications

食品包装：酸奶盖、酱料袋、油脂食品、奶酪、肉类、冷冻食品（低温柔封、耐油） 挤出涂布 / 复合：纸 / 铝箔 / 塑膜热封层、高阻隔复合膜（强粘、防脱层） 共挤热封层：与 PA/EVOH/PET 共挤，多功能密封层 玻璃 / 硬盒盖材：高粘、易撕 / 强封双效

Key Features

  • 超低起封温度（87°C 熔点） Surlyn 主流型号中熔点最低之一，极低温即可封合，保护热敏内容物。 优异热粘强度（Hot Tack） 锌型中热粘表现突出，封口未冷却即有高强度，防漏
  • 防爆开。 中高流动性（MFR 4.0） 平衡加工效率与膜泡稳定性，适配吹膜
  • 挤出涂布。 卓越耐油脂 & 阻隔性 锌离聚物特性，耐油
  • 耐化学
  • 阻氧，适配酱料
  • 乳制品。 超强基材附着力 对尼龙（PA）

Sourcing with POLYVALA

  • Flexible MOQ — single pallet to full container, mixed grades welcome
  • Batch certificate / COA provided with every shipment
  • Export documentation and consolidated freight from Shanghai port
  • Sample available on request for evaluation

Note: Technical data above is compiled from manufacturer documentation for reference. Final specifications will be confirmed against the actual batch certificate.

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