The most practical color masterbatch knowledge complete
1, is beneficial to maintain the stability of the pigment chemical stability and color;
2, so that the pigment in the plastic has better dispersion;
3, protect the health of the operator;
4, the process is simple, easy to change color;
5, clean environment, non-contaminated utensils;
6, save time and raw materials.
pigments or dyes, pigment is divided into organic pigments and inorganic pigments:
Commonly used organic pigments are: phthalocyanine red, phthalocyanine blue, phthalocyanine green, fast bright red, macromolecular red, macromolecular yellow, permanent yellow, permanent purple, azo red, etc.;
Commonly used inorganic pigments are: cadmium red, cadmium yellow, titanium dioxide, carbon black, iron oxide red, iron oxide yellow, etc.Carrier: is the matrix of the color masterbatch. The special masterbatch generally chooses the same resin as the product resin as the carrier, the compatibility of the two is the best, but at the same time, the fluidity of the carrier must be considered.
Dispersant: to promote the pigment evenly dispersed and no longer condensed, the melting point of the dispersant should be lower than the resin, and the resin has a good compatibility, and the pigment has a good affinity. The most commonly used dispersant is: polyethylene low molecular wax, stearate.
Additives: such as flame retardant, brightening, antibacterial, antistatic, antioxidant and other varieties, unless the customer requests, under normal circumstances does not contain the above additives in the color master.
classification according to the carrier: Such as PE masterbatch, PP masterbatch, ABS masterbatch, PVC masterbatch, EVA masterbatch, etc.
According to the use classification: such as injection masterbatch, blow molding masterbatch, spinning masterbatch, etc.Each variety can be divided into different grades, such as:
Advanced injection masterbatch: Used in cosmetic packaging boxes, toys, electrical shell and other advanced products.
Ordinary injection masterbatch: used for general daily plastic products, industrial containers and so on.
Advanced blown film masterbatch: used for blow molding coloring of ultra-thin products.
Ordinary blown film masterbatch: used for general packaging bags, woven bags blow molding coloring.
Spinning color masterbatch: used for textile fiber spinning coloring, color masterbatch pigment particles fine, high concentration, strong coloring, heat resistance, good light resistance.
Low color master: used to manufacture low grade products with low color quality requirements. Such as garbage cans, low grade containers, etc.Special masterbatch: is according to the user specified for the plastic variety of products, choose the same plastic as the carrier made of masterbatch. Such as PP masterbatch, ABS masterbatch respectively choose PP, ABS as the carrier.
General master: Also use a resin (often low melting point PE) as a carrier, but it can be applied to the coloring of other resins in addition to its carrier resin.
1, coloring and products processing at one time, Avoid the heating process of granulation and coloring on plastics, which is good for protecting the quality of plastic products.
2, the production process of plastic products is the most simplified.
3, can save a lot of energy.
coloring mother coloring products will not fade?
there is no absolute colorfast products, using the masterbatch coloring of products is also is still likely to fade, just at different levels according to different grades of products, some more obvious, some are difficult to detect.
choose masterbatch six big advantage
1, make the pigment in the product has a better dispersion
2, help to maintain the chemical stability of the pigment
3, ensure the stability of the product color
4, protect the health of the operator
5, keep the environment clean, Non-polluting utensils
6, the process is simple, easy to change color, To save time and materials
coloring mother with the difference between a dedicated masterbatch
dedicated masterbatch: Is according to the user specified for the product of the plastic variety, the selection of the same plastic as the carrier made of the masterbatch. Such as PP masterbatch, ABS masterbatch respectively choose PP, ABS as the carrier.
general masterbatch is relatively simple and convenient, but the drawback is more, suggest you choose special masterbatch.
why many companies are universal masterbatch production?
most formal international universal masterbatch masterbatch company usually does not produce.
general masterbatch there are many shortcomings. In fact, the ""universal"" range of the universal masterbatch is very narrow, and the technical indicators and economic benefits are also poor, which are specifically manifested in:
1, the mother color shading effect of predictive error is used for coloring, The pigment of the general color master will show different colors in different plastics, so the predictability of the coloring effect is poor.
2, affect other properties of the plastic products especially the impact strength, the product easy to deformation, distortion, the engineering plastic is more apparent.
3, cost is high coloring mother in order to be able to ""general"", tend to choose high heat-resistant grades of pigment, wasteful.
masterbatch in addition to the color, Color master can also have flame retardant, brightening, anti-static, anti-oxidation, anti-ultraviolet and other functions in some functions. Sometimes, although the customer does not request, the color parent company will also suggest that the user add some additives according to the needs of the product, such as adding certain additives in the color master, such as brightening agent. Of course, this will increase the cost of the product.
color mother of production process
1, the product name, thus the name and the process technology
according to the material can be divided into: Polyethylene, polypropylene, ABS, HIPS/PS, nylon, polyester, polypropylene spinning, pearlescent, PE cable sheath, communication cable, PE foam, PS foam masterbatch.
according to the function is divided into: antistatic, flame retardant, anti-aging, anti-reflection and whitening bright color masterbatch.
according to the color can be divided into: black, white, yellow, green, red, orange, brown, blue, silver, gold, purple, grey, pink, pearl, imitation marble (flow lines), wood grain color masterbatch.
2, masterbatch production processes have four kinds of methods of
(1) ink method: as the name implies, is in the masterbatch production using ink paste production method, namely through three roll grinding, the protective layer of paint coated on the surface of a layer of low molecular. The fine color paste after grinding is mixed with the carrier resin, and then plasticized by the two-roll plasticizer (also known as the two-roll open mill), and finally granulated by the single screw or twin-screw extruder.
(2) the washing method: is pigment, dispersing agent and water through the sand, make the pigment particles less than 1 & mu; m, and through the phase transfer method, so that the pigment into the oil phase, and then dry to obtain the color masterbatch. Phase transfer requires the use of organic solvents, as well as the corresponding solvent recovery device. The process is as follows:
fine color paste washing → Evaporation concentrate drying → Add carrier → Extrusion granulation
(3) to knead legal: is the pigment and oil carrier after mixing, use paint oil-wet this one characteristic, make through kneading pigment from water flush into the oil phase. At the same time, the surface of the pigment is covered by the oil-based carrier, so that the pigment is dispersed and stable, and the pigment is prevented from condensing.
(4) metallic soap: after grinding is pigment granularity reaches 1 & mu; m or so, and at a certain temperature to add soap liquid, so that each pigment particles surface layer is evenly moistened by soap liquid, forming a layer of saponification liquid, when the metal salt solution is added with the saponification layer on the surface of the pigment chemical reaction and the formation of a layer of metal soap protective layer (magnesium stearate), so that after grinding the pigment particles will not cause flocculation phenomenon, and protect a certain fineness.
3, the process is as follows:
ingredients & rarr; Mixing → Coarse color paste → Three roll grinding → Fine color paste → Two roll plasticating → Extrusion granulation