Numerous beverages are sold on supermarkets contained by the bottles with varieties of shapes and colorful bottle caps. But do you know how to dye the bottles and bottle caps with different colors? If you are curious about it, please read on. We will introduce you how the injection molding machine for bottle cap tint bottle cap with any color you like.

There are two ways to tint the plastic bottle caps with different colors. The first one is to mix toner directly with resin and the second one is masterbatch.

Toner mixed with resin

This method has not restrict requirement as what we need to do is just to mix toner with resin and then send them into the next process. It is easy to operate with lower cost but the deadly shortage is its poor coloring uniformity and quality stability.

Masterbatch 

Masterbatch method is colorant and carrier resin, dispersant, other additives prepared into a certain concentration of colorant particles. Add a certain amount of masterbatch color when producing plastic caps according to the coloring requirements to meet the coloring requirements.

Masterbatch can be classified by coloring resin, such as ABS masterbatch, PC masterbatch, PP masterbatch, etc.; It can also be classified by coloring resin and process, including injection molding, blowing film and extrusion. Due to pre-treating pigment, masterbatch has a higher coloring power therefore this method can save more pigment with a high color quality.

What role the dispersant plays in the production process?
 

Dispersant through the wetting and penetration of pigment to eliminate the surface air, the condensed body, the aggregate dispersed into fine, stable and uniform particles, and no longer condensed in the process of processing, commonly used dispersant is low molecular weight polyethylene wax, for the more difficult to disperse organic pigment and carbon black using EVA wax or oxidized polyethylene wax, There is a great difference between the synthesized low molecular weight polyethylene wax and the low molecular weight polyethylene wax produced by polyethylene cracking. Other additives are coupling agent, antioxidant, light stabilizer, antistatic agent, filler, etc., depending on the requirements and varieties of the amount of addition, known as multi-function masterbatch, such as adding brightener, is conducive to molding products demolstering and improve the surface brightness of products.

The production process of injection molding machine for bottle cap is very complex as this machine has numerous sophisticated fitting and accessories. When producing products, we must check every part to make sure the production proceed successfully.

 And this is the tinting principle in injection molding machine for bottle cap. More information, please feel free to contact us. NINGBO LISONG INJECTION MOLDING TECHNOLOGY CO.,LTD is professional manufacturer in injection molding machine. We  are devoted to provide a much lower price in wholesale injection molding machine for bottle cap with a much higher quality.