Plastic masterbatch is one of the most vital ingredients in manufacturing quality plastic products. Plastic masterbatch consist of filler compounds, base resins, functional additives and color pigments that all together contribute specific characteristics to the final products. Among various kinds of materbatches are presenting on the market, PE, PP and PS masterbatch are the most commonly used.
PE plastic masterbatch – What is it? Why are the applications of this masterbatch?
PE plastic masterbatch is a polyethylene based plastic filler granule containing 75-80% calcium carbonate. It is naturally white with high dispersion. PE masterbatch is used in the plastic industry to change various properties of substrate or polymer. This is a special formula by blending polyolefin with super-fine Calcium Carbonate in the plastic injection process, in order to reduce product costs for customers.
PE masterbatch is versatile and easily applied in multiple applications such as bottles, industrial films, gallon pots, lids, packaging materials, buckets, housewares, toys, boxes, bags (shopping bags, garbage bags), etc.
PE plastic in nature appears variously from almost clear to milky-opaque or opaque. The color is dependent on the thermal history and film thickness. LLDPE is the most optically clear with HDPE being the least opaque.
How to use PE plastic masterbatch correctly in industrial productions?
PE plastic masterbatch can be modified during the plastic-based products manufacturing processes by various methods such as blow molding, blown films, injection, thermoforming and extrusion. For example, it can be mixed with polyethylene for blowing, laminating etc. and very easily dispersed with good compatibility. It functions as a modifier to improve heat resistance, flexural strength, dimensional stability and printability. It also reduces heat loss when burning as well as prevents environmental pollution.
The usual recommended usage of PE masterbatch ranges from 10 ~ 40% depending on the product. The processing temperature is set according to the plastic processing temperature and preferably ranges from 240 ± 40 ° C.
PP plastic masterbatch – the second-most produced and utilized plastic
Plastic masterbatch products contain polypropylene (PP) plastic in the composition with high mechanical strength (tear strength and tensile strength). It is quite firm and is not as flexible as PE, not stretched and therefore made into fibers. In particular they easily tear easily when there is a cut or a small puncture. This is also the reason PP masterbatch is used very often in the food industry in the form of food containers. Moreover, the high transparency and surface gloss of PP masterbatch gives this material a high printability and clarity.
PP plasticis colorless, odorless, tasteless, non-toxic. PP burns brightly with a pale blue flame, has a plastic flow, has a burning smell similar to that of rubber. It can withstand temperatures higher than 100oC. In addition, PP masterbatch also has waterproof properties for O2, steam, grease and other gases.
How can PP plastic masterbatch modified and used in other productions?
PP plastic masterbatch can be modified during the plastic-based products manufacturing processes by various methods such as blow molding, blown and cast film, injection molding, thermoforming, extrusion. PP masterbatch can be used in various applications from products made by sheet extrusion to daily housewares like jars, pots, lids, bags, automobile parts. However, PP plasticis not suitable for applications where cooling is an intrinsic process.
For example, it can be used as a single-layer packaging for food preservation, which do not require strict antioxidant or as food packaging, water bottle, food storage boxes and even milk bottles with nipples for babies. Some products made from PP have good heat resistance that can be used in microwave ovens. Moreover, PP plastic masterbatch is also produced as a laminated film to increase the permeability of air and steam, create high printing capabilities, and tear easily to open the packaging (due to the creation of a cut) and create high glossiness for packaging products.
Characteristics of Polystyrene in PS plastic masterbatch
Polystyrene (often called PS) is a thermoplastic. PS is a kind of transparent hard plastic, no taste, burning for an unstable flame. PS colorless and easy to create color, beautiful appearance, easy to process by injection and injection molding method (processing temperature is about 180 – 200oC). The mechanical properties of PS depend on the degree of polymerization.
PS plastic masterbatch – Compositions, Functions and Applications
PS Filler Masterbatch consists of high quality CaCO3 powder, base resin, colorant for plastic and other functional additives. These ingredients are mixed together by twin-screw machine, stricly controlled by the newest technology according to European standard. PS plastic masterbatch is widely used in the plastic industry to reduce the production cost and improve various properties of final products such as providing better dispersion, improving elongation of usage lifespan, providing more whiteness to products. PE plastic masterbatch can be mixed with polystyrene (PS) resin for extrusion, injection moulding, thermoforming, etc. and is easy to disperse well in the mixture with good compatibility.
Applications of PS plastic masterbatch are sheet extrusion, pots, household goods (such as cups, plates, trays, toys, etc.), electronic/electrical wires and cables, etc.