1mm to 5mm: Matching Orifice Size and Material to Your Formula’s Viscosity

1. The Physics of Flow: Viscosity vs. Aperture Size

The "pourability" or "squeezability" of your product depends on its viscosity. As a professional manufacturer, SampoX categorizes orifice sizes into three main functional groups:

• 1.0mm - 2.0mm (Precision Flow): Ideal for low-viscosity liquids, serums, or oils. These often require nozzle tubes (pointed tips) to ensure a controlled drop-by-drop application.

• 3.0mm - 4.0mm (Standard Flow): The "sweet spot" for most lotions and medium-thickness creams.

• 5.0mm and above (High-Volume Flow): Necessary for thick masks, body scrubs with particles, or heavy sunscreens. Using a small hole for these formulas creates excessive back-pressure, which can cause the tail seal to burst.

2. The "Nozzle" Trap: Why Size Isn't Everything

Nozzle tubes are highly popular for eye creams and spot treatments because they offer surgical precision. However, because the plastic at the tip of a nozzle is often thinner or shaped differently than a standard head, it is more vulnerable. If the aperture is too small for a slightly thick formula, the user will apply extreme pressure, which stresses the plastic molecular structure, making it even more susceptible to chemical attack.

3. Case Study: The Danger of Chemical Corrosion

A common nightmare in our industry involves the corrosion of the nozzle tip after filling. We once encountered a case where a client’s specialized formula—containing high concentrations of certain active ingredients—began to "melt" or corrode the internal wall of the pointed tip.

• The Cause: The formula reacted with the specific grade of PP (Polypropylene) used in the nozzle, causing the plastic to soften and degrade.

• The Result: The tip became brittle, changed color, and eventually snapped off during use. This proves that as a producer, we must look beyond just the "hole size" and deeply examine chemical compatibility.

4. How SampoX Prevents "Tip Failure"

To ensure your product launch is successful, SampoX follows a rigorous technical protocol:

1. Viscosity Testing: We recommend the orifice size based on your specific formula's centipoise (cP) rating.

2. Compatibility Immersion: We perform accelerated aging tests where your formula is put in contact with our nozzle tubes under high temperatures to check for signs of softening or corrosion.

3. Material Selection: If your formula is aggressive (containing high oils or acids), we can switch to specialized resin grades or lined tips to provide an impenetrable barrier.

Conclusion Packaging is a balance of physics and chemistry. Whether you are dealing with a watery serum or a thick clay mask, the orifice size and material choice will define the user experience. Partnering with a knowledgeable producer like SampoX ensures that your nozzle tubes don't just look good—they function perfectly until the very last drop.

Call to Action Are you launching a high-potency serum or a thick treatment cream? Contact SampoX today for a professional consultation on aperture sizing and chemical compatibility testing.