2014年4月28日星期一

What is the Difference Between a Masterbatch And Precolored Resin?

A masterbatch is pre-dispersed concentrated color that is let down with natural polymer during molding. With a precolor all the polymer is entirely compounded with the proper amount of color and delivered ready-to-use, eliminating metering and dispersion difficulties. A Plastic Masterbatch offers economic advantages associated with resin purchasing and color obsolescence. Additionally, since masterbatches are not fully compounded most of the polymer used does not exhibit an additional heat history, potentially deteriorating the properties of some polymers.
Additive Black Masterbatch
Color masterbatch main components:
First, Pigment
Generally pigment is divided into organic colour pigment, like phthalocyanine green and the inorganic colour pigment like oxidation iron oxide red and the titanium. Dye like reductant pink, scattered orange and so on. Polyolefine and PVC color masterbatch use the pigment, generally speaking that the dye cannot use in the polyolefine coloration, otherwise it will cause the serious migration.
Second, Dispersants
Dispersants mainly makes the pigment surface moist which benefits further dispersing in the pigment, and stabilizes in the resin, at the same time it must have good compatibility with the resin, and does not affect the coloring product quality. Polyolefine color masterbatch of dispersant generally adopts the low molecular polyethylene wax or zinc stearate and so on. Engineering plastics color masterbatch of dispersant usually adopts the heteropolarity low molecular polyethylene wax, magnesium stearate, and calcium stearate and so on.
Third, Carrier resin
Carrier resin makes the pigment uniform distribution and causes the Color Masterbatch to be granular shape. Choosing carrier must consider the compatibility with coloring resin and also must also consider masterbatch should have good dispersivity, therefore the carrier fluidity should be higher than the colored resin, and simultaneously it affects the product quality after colored. For example, we select similar high polymer with high melt index, enable the melt index of masterbatch higher than the colored high polymer to ensure consistent luster in the final product. WE choose LDPE resin (low density polyethylene) as the carrier for PE, PP color Masterbatch, and modified PS as the carrier for PS, ABS Masterbatch.
By Carrier Category:
Such as PE masterbatch, PP masterbatch, ABS masterbatch, pvc masterbatch, EVA masterbatch, etc.
Classification by purpose: such as injection Masterbatch, blow masterbatch, masterbatch and other spinning
The species can be divided into different levels, such as:
1、 Senior injection masterbatch used in cosmetic packaging, toys, electrical enclosures and other advanced products.
2、 ordinary injection masterbatch for general household plastic products, industrial containers.
3、 Senior blowing masterbatch for thin products blow coloring.
4、 Common blowing masterbatch for general packaging bags, woven bags blow coloring.
5、 plastic trays spinning textile fibers for spinning colored masterbatch, masterbatch pigment fine particles, high concentration, tinting strength, heat resistance, light resistance.
6、 lower for the manufacture of color packaging company masterbatch less demanding lower quality products, such as trash, lower containers.
















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