# LEMA Plastic > Virgin Plastic Resin Supplier | PET, PC, POM, EVA, PMMA, ABS ## Posts - [Why Does Polycarbonate Turn Yellow? Causes, Prevention & Grade Selection](https://ccc.mysxxlckj.com/why-does-polycarbonate-turn-yellow/): PC yellowing can reduce optical clarity and trigger customer complaints. Learn the main causes, how to diagnose them, and how to choose the right grade for the application. - [Virgin vs Recycled Plastic Resin: 8 Questions Buyers Should Ask Before Switching](https://ccc.mysxxlckj.com/virgin-vs-recycled-plastic-resin-buyer-guide/): Compare virgin and recycled plastic resin before switching suppliers. Review traceability, property consistency, appearance, documentation and production-trial requirements. - [How to Qualify a Second Source for Engineering Resins Without Disrupting Molding Production](https://ccc.mysxxlckj.com/second-source-engineering-resin-qualification/): A practical qualification plan for adding a second source for PC, POM, ABS or PET resin without turning a supply-risk decision into a molding problem. - [How to Replace a Discontinued Resin Grade Without Costly Mold or Process Failures](https://ccc.mysxxlckj.com/replace-discontinued-resin-grade/): A practical guide to replacing a discontinued PC, POM, ABS or PET resin grade without relying on a nameplate match or risking molding failures. - [POM vs PA66: Which Engineering Plastic Is Better for Gears, Clips and Wear Parts?](https://ccc.mysxxlckj.com/pom-vs-pa66-engineering-plastic-guide/): Compare POM and PA66 for gears, clips, bushings and wear parts. Review friction, moisture, dimensional stability, strength and sourcing questions before selecting a grade. - [POM vs Nylon for Precision Molded Parts: How to Avoid Dimensional Drift](https://ccc.mysxxlckj.com/pom-vs-nylon-dimensional-stability/): POM vs nylon for gears, clips, and sliding parts: compare moisture absorption, stiffness change, wear, and processing to prevent dimensional drift. - [POM Homopolymer vs Copolymer: How to Choose the Right Acetal Grade](https://ccc.mysxxlckj.com/pom-homopolymer-vs-copolymer/): Compare POM homopolymer and copolymer for gears, clips, valves and precision molded parts. Learn how stiffness, chemicals, shrinkage and processing affect grade selection. - [Polycarbonate Grade Selection: MFR, Viscosity, Datasheet](https://ccc.mysxxlckj.com/polycarbonate-datasheet-guide/): How to read a PC datasheet: MFR and viscosity windows, the seven fields that matter, compliance documents and batch-to-batch drift. - [PMMA vs Polycarbonate: Which Clear Plastic Is Better for Outdoor Lighting and Sheets?](https://ccc.mysxxlckj.com/pmma-vs-polycarbonate-clear-plastic-guide/): Compare PMMA and polycarbonate for outdoor lighting, transparent sheets and protective covers. Review clarity, impact resistance, weathering and processing trade-offs. - [PMMA Resin: 7 Checks Before You Order Acrylic Pellets](https://ccc.mysxxlckj.com/pmma-resin-buying-guide/): Learn how to choose PMMA resin for injection molding or extrusion. Compare flow, optical data, processing guidance, weathering information and batch documents before ordering. - [Plastic Resin COA Checklist: Verify an Imported Batch](https://ccc.mysxxlckj.com/plastic-resin-coa-checklist-verify-imported-batch/): Imported resin COA checklist: check lot traceability, test methods, specs and retained samples before you release a batch. - [Black Specks, Flow Marks and Color Streaks: A Plastic Resin Troubleshooting Checklist](https://ccc.mysxxlckj.com/plastic-resin-black-specks-flow-marks-color-streaks/): Troubleshoot black specks, flow marks and color streaks in molded plastic parts. Use this buyer and processor checklist before changing resin grades or suppliers. - [PET Resin IV Explained: How Bottle and Sheet Buyers Choose the Right Grade](https://ccc.mysxxlckj.com/pet-resin-iv-explained/): Understand PET resin IV before you buy. Learn what intrinsic viscosity means, which documents to request, and how bottle and sheet buyers can avoid a wrong-grade order. - [PC Resin for LED Diffusers: How to Specify Haze, Transmittance and UV Stability](https://ccc.mysxxlckj.com/pc-resin-led-diffuser-buyers-guide/): Buying PC resin for LED diffusers? Use this practical checklist to specify light transmission, haze, UV stability, melt flow, documents and trial requirements before ordering. - [PC/ABS Molding Defects: How to Prevent Silver Streaks, Warpage and Poor Surface Finish](https://ccc.mysxxlckj.com/pc-abs-molding-defects-troubleshooting/): Solve common PC/ABS injection molding defects, including silver streaks, warpage and poor surface finish. Use this practical resin and process checklist. - [MFI vs MVR: How to Choose Plastic Resin Flow for Injection Molding and Extrusion](https://ccc.mysxxlckj.com/mfi-vs-mvr-plastic-resin-selection/): Understand MFI and MVR before selecting plastic resin. Learn why test conditions, flow path, melt strength and processing method matter more than one number. - [How to Tell If Plastic Resin Is Virgin or Recycled](https://ccc.mysxxlckj.com/how-to-tell-if-plastic-is-virgin/): Worried your supplier sold you recycled resin instead of virgin? Learn practical checks — from TDS reading to material testing — to verify resin quality before it disrupts production. - [EVA vs POE: Which Flexible Resin Is Better for Foaming, Compounding and Impact Modification?](https://ccc.mysxxlckj.com/eva-vs-poe-flexible-resin-guide/): Compare EVA and POE for flexible compounds, foaming and impact modification. Learn what buyers should check before selecting an elastomer resin grade. - [EVA Resin for Crosslinked Foam: VA, MFR & Batch Switch](https://ccc.mysxxlckj.com/eva-resin-crosslinked-foam-va-mfr-batch-switch/): How VA content and MFR affect crosslinked EVA foam density, shrinkage and yield—plus a batch-switch checklist to qualify a new lot. - [EVA Copolymer: 7 Checks Before You Order Pellets](https://ccc.mysxxlckj.com/eva-copolymer-buying-guide/): Learn how to select EVA copolymer for foam, film, molding and compounding. Check VA content, melt flow, density, additives and batch documents before ordering. - [Engineering Plastics Guide: PA, PC, ABS, POM & PBT Applications](https://ccc.mysxxlckj.com/engineering-plastics-guide-pa-pc-abs-pom-pbt/): Learn how to select engineering plastics including PA, PC, ABS, POM and PBT for automotive, electrical, industrial and consumer components. - [Crystallinity in BOPET, BOPP and CPP Films: A Business Guide](https://ccc.mysxxlckj.com/crystallinity-bopet-bopp-cpp-film-performance/): Crystallinity influences the performance, processability and application range of flexible films. This guide explains its role in BOPET, BOPP and CPP films and how to select the right material balance - [Automotive Plastics: Material Selection for Vehicle Components](https://ccc.mysxxlckj.com/automotive-plastics-material-selection-guide/): A practical overview of selecting PP, ABS, PA6/PA66, PC/ABS and modified PA for automotive interior, exterior, electrical and under-the-hood components. - [Acrylic vs Polycarbonate for Outdoor Signage: Which Material Fails Less in Real Use?](https://ccc.mysxxlckj.com/acrylic-vs-polycarbonate-outdoor-signage/): Choosing acrylic or polycarbonate for outdoor signage? Compare impact resistance, optical clarity, weathering, fabrication, and grade selection with test-based checkpoints. - [ABS vs HIPS vs GPPS: Which Resin Is Best for Housings, Packaging and Consumer Products?](https://ccc.mysxxlckj.com/abs-vs-hips-vs-gpps-resin-selection/): Compare ABS, HIPS and GPPS for housings, packaging and consumer products. Learn how impact strength, appearance, cost and processing affect resin selection. ## Pages - [Home - 中文 (中国)](https://ccc.mysxxlckj.com/home-%e4%b8%ad%e6%96%87-%e4%b8%ad%e5%9b%bd/) - [News](https://ccc.mysxxlckj.com/news/) - [Contact Us](https://ccc.mysxxlckj.com/contact-us/) - [About Us](https://ccc.mysxxlckj.com/about-us/) - [Home](https://ccc.mysxxlckj.com/) [comment]: # (Generated by Hostinger Tools Plugin)