{"id":4912,"date":"2024-03-06T14:55:55","date_gmt":"2024-03-06T14:55:55","guid":{"rendered":"https:\/\/caucasuspolymer.com\/what-is-fiber-and-why-is-it-important-for-health\/"},"modified":"2025-12-02T19:21:19","modified_gmt":"2025-12-02T19:21:19","slug":"what-is-fiber-and-why-is-it-important-for-health","status":"publish","type":"post","link":"https:\/\/caucasuspolymer.com\/en\/what-is-fiber-and-why-is-it-important-for-health\/","title":{"rendered":"What Are LDR and MFI? A Complete Technical Guide for Developing PE and PP Formulations"},"content":{"rendered":"\t\t
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What Are LDR and MFI? A Complete Technical Guide for Developing PE and PP Formulations<\/p>\n

For process engineers and production managers in the polymer industry, two parameters are absolutely fundamental \u2014 LDR<\/strong> and MFI<\/strong>. Choosing them incorrectly results in the most expensive types of failures: color mismatch, surface defects, equipment damage and, worst of all, loss of customer trust. Miscalculating LDR or ignoring the MFI of the masterbatch is the biggest mistake companies make when trying to \"save\" on additives.<\/p>\n

In this guide, as a technological partner of Caucasus Polymer Group, we explain in detail what these values mean and how proper selection for polyethylene (PE) and polypropylene (PP) directly affects your product quality and total production cost.<\/p>\n

What Is LDR \u2014 the Let Down Ratio?<\/h2>\n

LDR (Let Down Ratio)<\/strong> represents the percentage dosage of a masterbatch or additive in the base resin. It is calculated by weight.<\/p>\n

For example, an LDR of 2% means that to produce 100 kg of final compound, you need 98 kg of your natural polymer (PE or PP) and 2 kg of masterbatch.<\/p>\n

Why LDR Is Not Simply \u201cMore\u201d or \u201cLess\u201d<\/h3>\n

Choosing the right LDR is always a balance between economics and quality:<\/p>\n