๐“๐จ๐๐š๐ฒ'๐ฌ ๐Š๐๐Ž๐–๐‹๐„๐ƒ๐†๐„ ๐’๐ก๐š๐ซ๐ž : ๐๐ข๐ ๐ฆ๐ž๐ง๐ญ๐ฌ ๐๐จ๐ง’๐ญ ๐ฃ๐ฎ๐ฌ๐ญ ๐œ๐จ๐ฅ๐จ๐ซ ๐๐•๐‚. ๐“๐ก๐ž๐ฒ ๐œ๐ก๐š๐ง๐ ๐ž ๐ก๐จ๐ฐ ๐ข๐ญ ๐š๐ ๐ž๐ฌ.

๐“๐จ๐๐š๐ฒ'๐ฌ ๐Š๐๐Ž๐–๐‹๐„๐ƒ๐†๐„ ๐’๐ก๐š๐ซ๐ž

๐๐ข๐ ๐ฆ๐ž๐ง๐ญ๐ฌ ๐๐จ๐ง’๐ญ ๐ฃ๐ฎ๐ฌ๐ญ ๐œ๐จ๐ฅ๐จ๐ซ ๐๐•๐‚.

๐“๐ก๐ž๐ฒ ๐œ๐ก๐š๐ง๐ ๐ž ๐ก๐จ๐ฐ ๐ข๐ญ ๐š๐ ๐ž๐ฌ.

That is the part many people underestimate.

In PVC, pigment is not only a visual choice.


It can influence:

• heat absorption

• UV resistance

• surface temperature

• color retention

• chalking behavior

• gloss loss

• thermal history

• stabilizer demand

• long-term mechanical retention


Two PVC profiles can have the same formulation.

Same resin.

Same stabilizer.

Same lubricant system.

Same processing window.

Change the pigment package, and the aging behavior can change.


Why?

Because pigments interact with light, heat, and the polymer surface.

A dark pigment may increase surface temperature under sunlight.

A poor pigment dispersion can create weak zones and uneven appearance.

Some pigments improve opacity and UV screening.

Some pigment choices can affect heat build-up during service.

TiO₂ grade and surface treatment can strongly influence weathering, gloss retention, and chalking.


Carbon black can provide strong UV protection in many systems, but it also changes heat absorption and surface temperature.


So the question is not only:

“Does this pigment give the right color?”

The better question is:

“What does this pigment do to the material after 5 years outside?”

Because color is not just aesthetics.

Color changes exposure.

Exposure changes aging.

And aging decides whether the product still performs when the customer has stopped looking at the datasheet.

In PVC, pigment selection is not decoration.

It is durability engineering.


source : Orbimind AB


#PVC #Pigments #PVCCompounding #Weathering #PolymerStability #MaterialsScience #PlasticsProcessing

Comments

Post a Comment

Popular posts from this blog

Today's KNOWLEDGE Share : Robotic 3D printing can compete with traditional boatbuilding

Image
Today's KNOWLEDGE Share “Robotic 3D printing can compete with traditional boatbuilding”, Simone Barbera and Mattia De Santis, Caracol V2 catamaran was printed in Italy at Caracol’s production center and headquarter in Barlassina, near Milan, with a Heron AM 400, Caracol’s robotic Large Format Additive Manufacturing (LFAM) platform. The lattest was specifically configured with a 7-axis robotic arm mounted on a rail, enabling the printing of parts up to 10 meters in length. How did the collaboration between V2 Group and Caracol come about? Simone Barbera : The collaboration between V2 Group and Caracol originated from a shared vision to revolutionize boat manufacturing through sustainable innovation. V2 Group, a Spanish-company specialized in nautical design and engineering, is seeking to develop electric vessels manufactured sustainably. On the other hand, Caracol, leader in robotic advanced manufacturing technology, had had years of experience working with Large Format Additive Ma...
Read more

Today's KNOWLEDGE Share : What Is Going Wrong in UK Plastics Recycling?

Image
Today's KNOWLEDGE Share What Is Going Wrong in UK Plastics Recycling? Biffa shut its Sunderland plant. Viridor walked away from Avonmouth and Rochester. Yes Recycling Fife collapsed within a year. All three were backed by major investments All three had buyers lined up for recyclate All three are now offline This is not bad luck It is bad structure Over the next four posts I will break down: 1. Why cheap virgin imports are undercutting UK recyclers 2. How weak policy enforcement is fuelling market failure 3. What volatile PRNs and cheap exports are doing to infrastructure 4. Why demand from brands is softer than their promises Let’s start with the first: **Cheap Virgin Resin = Broken Economics** Virgin PE, PP, and PET have been flooding the global market. New capacity in Asia and the US has driven prices down 30 to 40 percent. Meanwhile, recycled plastic costs more to produce in the UK than it can sell for. We are asking UK recyclers to compete with materials made in places with – ...
Read more

Today's KNOWLEDGE Share : A BUG IN INJECTION MOLDING

Image
Today's KNOWLEDGE Share A bug in injection molding – an injection-molded part in a bug? Neither! Nature and injection molding have reached similar results. Nature created the first micro-gear long before any human engineering existed. One such example is the Issus coleoptratus (shown in the picture). Furthermore, only now are we reaching the point where injection-molded polymer microgears can approach this level of performance. Looking at the images, which one do you think is the natural gear, and which one is the molded version? It is not that easy to tell, right? Their appearance and operating principles are surprisingly similar. Chitin, a natural linear polymer, forms what nature essentially "molds” into shape. In engineering, we rely on advanced technical polymers to produce similar geometry through actual injection molding. They are not the same material, yet they solve the same issue: Stiffness, dimensional stability, and reliable function at a scale where tolerances...
Read more