Comparison Articles
Option A against option B, with the trade-offs stated plainly.
37 articles
Calcium Carbonate
Coated vs Uncoated Calcium Carbonate
Coating is a surface treatment — most commonly stearic acid or a stearate — applied to CaCO₃ particles to make them hydrophobic and more compatible with non-polar polymer melts. Coated grades disperse more easily, reduce moisture pick-up during storage and…
ReadGCC vs PCC — Ground vs Precipitated Calcium Carbonate
GCC (Ground Calcium Carbonate) is produced by mechanically grinding natural limestone, marble or chalk. PCC (Precipitated Calcium Carbonate) is synthesised by carbonating a calcium hydroxide slurry with CO₂ under controlled conditions. The two share the…
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Masterbatch
Bio-Based vs Biodegradable Masterbatch — Which Certificate Actually Applies
"Bio-based" and "biodegradable" answer two different questions and are certified by two different families of documents. Bio-based describes where the carbon came from and is evidenced by a bio-based carbon content result. Biodegradable or compostable…
ReadWhite Masterbatch vs Direct Titanium Dioxide Addition
Whether to dose TiO₂ into the process as a pre-dispersed white masterbatch or as direct TiO₂ powder into the extruder / compounder.
ReadDesiccant Masterbatch vs Resin Drying
Whether to remove moisture defects by drying the resin (dehumidified dryer) or by adding a desiccant masterbatch that chemically binds residual moisture in the melt.
ReadCalcium Carbonate vs Talc
Which mineral filler to specify for cost reduction, stiffness, or dimensional performance in a polyolefin or PVC formulation.
ReadRutile vs Anatase TiO₂
Which TiO₂ crystal form to specify for a given end-use, weathering exposure and processing temperature.
ReadVirgin vs Recycled Carrier in Masterbatch
Whether to accept a masterbatch built on a recycled polymer carrier or to require a virgin carrier, given cost, regulatory and quality constraints.
ReadPP Masterbatch vs PE Masterbatch
Whether to specify a masterbatch on a PP carrier or a PE carrier for a given end-polymer, process and property target.
ReadColor Masterbatch vs Pre-coloured Compound
Whether to buy colour as a masterbatch (dosed at the machine) or as a pre-coloured compound (ready-to-run pellets).
ReadAdditive Masterbatch vs Process Optimisation
Whether a recurring defect or performance gap should be solved by adding an additive masterbatch (slip, anti-block, anti-static, UV, processing aid, etc.) or by optimising the process (temperature profile, screw design, cooling, die geometry, drying).
ReadPrimary vs Secondary Antioxidants, and When Both
Whether to run a primary AO alone, a secondary AO alone, or a balanced primary + secondary system — and at what loading.
ReadPET Toughener vs IV Modifier vs Process Fix
Whether PET brittleness or drop failure should be solved with a toughener, an IV modifier / chain extender, or a process/drying fix.
ReadImpact Modifier vs Grade Change vs Filler Reduction
Whether to solve PP brittleness by adding an impact modifier, switching the base PP grade (homo → copo), or reducing filler loading.
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Mineral Fillers, Pigments & Reinforcement
ATH or Magnesium Hydroxide — Choosing a Halogen-Free Mineral Flame Retardant
Processing temperature decides. Aluminium trihydrate releases its water at around 200–220 °C, so it works in PVC, polyolefin cable compounds, EVA and thermoset composites processed below that. Magnesium hydroxide decomposes at around 300–330 °C, so it is…
ReadCoated or Uncoated Talc for Plastics — Which One Your Line Actually Needs
Uncoated talc is the default and is the right buy for most dry-blended, well-mixed polypropylene compounds. A coated talc is worth paying for when you are fighting one of four specific problems: poor feeding and dusting at the hopper, high torque or…
ReadMineral Powder or Filler Masterbatch — Which Form Should You Actually Buy?
Buy neat mineral powder if you run a compounding line: a twin-screw extruder, gravimetric powder dosing, dust extraction and someone who owns the formulation. Buy a filler masterbatch if you feed an extruder or moulding machine directly: the mineral is…
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Performance Additives
Halogen-Free vs Halogenated Flame Retardants — Choosing on Evidence
Halogenated systems interrupt combustion chemically in the gas phase, which makes them extremely efficient: a brominated package with an antimony trioxide synergist reaches a UL 94 V-0 rating at loadings low enough to leave mechanical properties largely…
ReadImpact Modifiers — Selection by Polymer
An impact modifier is a rubbery phase dispersed in a rigid polymer to stop brittle failure. There is no universal grade: polyolefins take POE or EPDM, rigid PVC takes acrylic core-shell, MBS or CPE, and PET takes polyester-specific systems.
ReadUV Stabilizer Selection — HALS, Absorbers and the Difference That Matters
A UV absorber and a hindered amine light stabilizer do different jobs. The absorber intercepts UV photons before they reach the polymer backbone and works best in thicker sections where there is enough path length to absorb in. HALS does not absorb UV at…
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Personal Care & Home Care Formulation
Cosmetic Grade vs Technical Grade: What Actually Differs and How to Verify It
"Grade" is a commercial description, not a legal classification. The same chemical sold as cosmetic grade and as technical grade may share an assay figure and differ entirely in impurity profile, heavy metal limits, microbiological control, odour and…
ReadChoosing a Rheology Modifier: Carbomer, Cellulose, Gums or Electrolyte
Five questions decide it: is the product a surfactant system or an emulsion; must it be crystal clear; how much electrolyte does it contain; what pH will it sit at; and what sensory behaviour do you want on skin or hair. Carbomers give clarity and a crisp,…
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Polymer & Plastics Processing
Antioxidants — Primary, Secondary and Why You Need Both
Polymer degradation during processing is a radical chain reaction, and it takes two different molecules to stop it. A primary antioxidant — usually a hindered phenolic — donates hydrogen to terminate radicals and protects the polymer in service over long…
ReadCompatibilizers for PP, PE and Recycled Blends
A compatibilizer is an additive that bonds two immiscible polymers, or a polymer and a filler, at their interface — most often a maleic anhydride grafted polyolefin, dosed at 1–5%.
ReadLubricants and Processing Aids — Internal, External and Fluoropolymer
Internal and external lubricants solve opposite problems and are routinely confused. An internal lubricant is compatible with the polymer, lowers melt viscosity and internal friction, and reduces torque and frictional heat — it changes how the melt flows.…
ReadPurging Compound Selection — Mechanical, Chemical and Abrasive Grades
Choose the purge by the contamination you are removing, not by the machine. Mechanical purges rely on high viscosity and shear to push melt out — they are the safest choice for routine colour changes on injection moulding and are the only sensible option…
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Water Treatment
Antiscalants and Phosphonates — Choosing the Right Threshold Inhibitor
Antiscalants work at sub-stoichiometric dose: 2–10 mg/L holds hundreds of mg/L of scale-forming ions in solution by distorting crystal growth. The selection driver is which scale you are fighting and whether the system carries chlorine. HEDP gives strong…
ReadWater Treatment Coagulant Selection Guide — Alum, PAC, Ferric and Polymer
Coagulant choice is decided by raw water alkalinity, temperature and the sludge you are willing to handle — not by price per tonne. Aluminium sulphate (alum) is the cheapest per kilogram but consumes about 0.5 mg/L of alkalinity as CaCO₃ for every 1 mg/L…
ReadIndustrial Chlorination and Disinfection — Dose, Contact Time and Residual
Disinfection is not a dose, it is a CT product: concentration of free residual multiplied by contact time. A plant achieving 0.5 mg/L free chlorine for 40 minutes delivers the same CT as 1.0 mg/L for 20 minutes, and both fail if short circuiting in the…
ReadOxidising vs Non-Oxidising Biocides — When Each One Wins
Oxidising biocides kill fast, cheaply and indiscriminately; non-oxidising biocides penetrate biofilm and survive conditions that destroy an oxidant. A working cooling programme uses both: a continuous or shock oxidant to hold the bulk water, plus a…
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