What is masterbatch?
Also known as masterbatch color species, masterbatch (Color Master Batch) is a new type of polymer materials colorants, also known as the pigment preparation material (Pigment Preparation). It consists of pigments or dyes, the carrier and additives are three basic elements of the composition, is uniformly contained to the extraordinary amount of pigment or dye is attached to the body of resin and the aggregation can be referred to the pigment concentrate was (Pigment Concentration) so he tinting strength is higher than the pigment itself. Simple point that the masterbatch is an extraordinary amount of pigment or dye uniformly contained attached to the resin and the obtained aggregates.
Second, the basic ingredients of the masterbatch?
Masterbatch basic ingredients:
A pigment or a dye pigment is divided into a commonly used organic pigments of organic pigments and inorganic pigments are: phthalocyanine red, phthalocyanine blue, phthalocyanine green,, Fast Scarlet macromolecules red macromolecules yellow, Permanent Yellow, Permanent inorganic pigments of purple, azo red: cadmium red, cadmium yellow, titanium dioxide, carbon black, iron oxide red, iron oxide yellow, etc.
2 carrier is the matrix of the masterbatch. Dedicated masterbatch generally choose products resin the same resin as the carrier, the compatibility between the two is preferably, but should also consider the fluidity of the carrier.
3 dispersant prompted the pigment is uniformly dispersed and no longer condensed, the melting point of the dispersing agent should be lower than the resin, and have good compatibility with the resin, and the pigment has a good affinity. The most commonly used dispersing agents: polyethylene of low molecular weight waxes, stearates.
Additives such as flame retardant, brightening, anti-bacterial, anti-static, anti-oxidation, and other varieties, unless the customer requests, under normal circumstances does not contain the additive masterbatch.
Third, the masterbatch points which varieties and grades?
Masterbatch classification used are the following: classification according to the carrier: PE masterbatch, PP masterbatch, ABS masterbatch, PVC masterbatch, EVA masterbatch by purpose: such as injection masterbatch, blow masterbatch the, spinning masterbatch varieties can be divided into different levels, such as:
Senior injection masterbatch: used in cosmetics packaging, toys, electrical enclosures and other advanced products.
2. Ordinary injection masterbatch: used for general household plastic products, industrial container. Senior blown film masterbatch: used for ultra-thin products, blow coloring. 4 blown film masterbatch: used for general packaging bags, woven bags blow coloring.
5. Spinning masterbatch: used for textile fiber spinning coloring masterbatch pigment fine particles of high concentration, good tinting strength, heat resistance, light resistance.
Lower masterbatch: used in the manufacture of products for color quality for less demanding lower, such as trash, lower container.
Dedicated masterbatch: use the same plastic as the carrier masterbatch manufacturing for products based on user-specified plastic varieties. PP masterbatch, ABS, PP, ABS masterbatch were selected as a carrier. Universal masterbatch: Also some resin (often a low melting point PE) as a carrier, but it can be applied to the outside of the carrier resin with other resins coloring.
, Universal masterbatch General masterbatch is relatively easy, but the disadvantage is more recommended to use special masterbatch. Dedicated masterbatch heat level is generally compatible with the plastic used in the product, you can rest assured that the use of the normal temperature. Only in the following cases can cause varying degrees of discoloration, First, the temperature outside the normal range, the downtime is too long.
9, compared to the masterbatch coloring and granulation coloring has the following advantages: 9.1 coloring products processing at once, to avoid the heating process of the granulation coloring plastics, good to protect the quality of plastic products. 9.2 Production of plastic products to the most simplified. 9.3 can save a lot of power
Why use masterbatch?
Masterbatch has the following advantages:
1 having a better dispersibility of the pigment in the article: The masterbatch contained the extraordinary amount of the pigment uniformly attached to the resin and the obtained aggregates. The thinning processing of the pigment the masterbatch production process shall, in order to improve the dispersibility of the pigment and coloring power. Dedicated masterbatch carrier and the article varieties of the same plastic, with a good match, after heating and melting the pigment particles can be well dispersed in the plastic products.
Conducive maintain the chemical stability of the pigment: Direct use of the pigment, absorbent, oxidation, and other phenomena occur due to direct contact with air in the process of storage and use pigments, pigment, made masterbatch, since the resin carrier of the pigment and the air , moisture barrier, can be unchanged for a long time so that the quality of the pigment.
3, to ensure the stability of the product color: the masterbatch particles and the resin particles are similar, more convenient and accurate in the metering and the mixing will not be adhered to the container, and the mixing of the resin is also more uniform, which can ensure the stability of the added amount, thereby to ensure the stability of the product color.
Protect operating personnel health: pigment powder, adding and mixing easy flying inhaled will affect the health of the operating personnel.
Keep the environment clean, not soiled utensils;
Process is simple, easy to turn color, save time and raw materials will absorb moisture, oxidation, agglomeration phenomena occurred: the pigment in the storage and use of the process of direct contact with the air, so the direct use of color dot the surface of the plastic products hue dark color Fading, causing dust to fly Yang, affecting the health of operators and mixing. Masterbatch in the production process after mechanical processing, the pigment thinning processing, fully kneading the pigment and a resin carrier, a dispersing agent, the pigment and the air, moisture barrier, thereby enhancing the weathering resistance of the pigment, improve dispersibility of the pigment and tinting strength, hue and brightness. Because similar masterbatch with the shape of the resin particles, is more convenient in the measurement accuracy, mixing will not be adhered to the container, thus saving raw materials used in the cleaning container and machine time and Cleaner. |
