Pigmentation in plastic containers, especially in plastic bottles and caps, not only influences their aesthetics, but plays an essential role in their functionality and performance. From product protection to brand identification, pigmentation in bottles is key to the world of plastics.
How are plastic bottles and caps pigmented?
Their coloration is a process carried out during manufacturing, and depends on the type of plastic (PET, PP, PEAD) and the type of pigment.
There are 3 ways to produce colored bottles and caps: through the extrusion process (base granules are mixed with masterbatch), injection-blow molding (preforms already have the desired color), and injection molding (colored plastic is injected into molds).
Pigmentation in bottles must be safe and suitable for the intended use of the container. Regardless of which process is used, the result is vibrant, durable colors that are stable under extreme conditions.
What is the purpose of pigmentation in plastic bottles and caps?
- Functionality and product protection: Pigments can reduce the effects of ultraviolet light exposure, protecting the contents from damage or degradation, especially for sensitive products such as food, beverages, or chemicals. Similarly, some pigments help containers achieve thermal resistance, allowing them to withstand elevated temperatures that may occur during transport or storage.
- Brand identity: Colors in bottles and caps allow brands to stand out in the market and be easily identified by consumers, achieving visual recognition. Additionally, product properties can be communicated simply by seeing the color; for example, green or brown tones are associated with an eco-friendly product.
- Impact on recycling: Not all pigments affect recycling equally; some deteriorate faster than others. It is important to use colors that do not interfere with the plastic recovery process. Neutral or translucent colors such as white are easier to recycle and promote sustainability.
Plastic is not just a polymer, but is made up of many more chemical components, and colorants form a large part of its structure. Chemistry professor Andrew Abbott notes that "Red, green, and blue plastics degrade more rapidly compared to those that are black, white, or silver."
Undoubtedly, choosing the right colors can make a big difference; however, it must be taken into account that all plastics degrade, and their oxidation rate will depend on the additive that has been added.
At Plastimex we have the most resistant containers of the highest quality. Best of all, pigmentation in bottles can be adapted to the needs of your product and brand. Contact us!
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