The numerous types of dyes used in plastic industries!

Dyes are used for a variety of reasons in different industries. Apart from their usage in textile industry, dyes are also used in industries manufacturing colored plastics.  A plastic dye is categorized into several types; some of the most important ones are as follows:

  • Natural dyes are acquired from natural sources like plants, leaves, flowers, and wood. It was Neolithic period, when dyes first came into existence. However, some of the natural dyes available in market are woad, madder, indigo and many more.
  • William Henry Perkin is the man behind existence of synthetic dyes. These dyes gained a lot of popularity as they are available in diverse range of colors, can be produced in a cost effective manner and possess exciting properties, which make it the best option that can be used in varied industries for an array of reasons. These dyes are further classified into various types known as vat, basic, mordant, and reactive dyes.

It is recommended to look for a reputed service provider to get high quality dyes and to get maximum information about dyes and precautions you need to take while using natural and synthetic dyes for manufacturing colored plastic goods.

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Disperse dyes and their applications

Dye is a coloring agent used to bring attractive shades to different types of fabrics. Disperse colorants are non-ionic chemicals that are insoluble in water. They are mainly used to induce shades to polyesters and to some extent; they can be used on materials like nylon, cellulose, cellulose acetate, and acrylic.

Due to their low water solubility feature, they are best suitable for coloring and printing hydrophobic fibers. The polyester fibers, such as synthetic textiles, are hydrophobic. That means they cannot be colored with water-soluble chemicals because synthetic or semi-synthetic polymers do not absorb them properly. That is the reason why water-insoluble colorants are used to induce attractive shades polyester fibers. These dyes must be dispersed before application.


  • These are organic dyeing agents
  • Non-ionic compounds
  • They can be applied under high temperatures e.g. 130 degree Celsius.
  • In some cases, temperature requirements may vary according to the type of method used to bring shades, such as carrier method, high temperature method, or thermosol process.
  • Dispersed in the dye liquor (most preferred medium is an aqueous liquor which converts colorant into fine particles)
  • They bind to polyesters by creating H-Bonds
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Induce eye-catching colors with quality plastic dyes

Plastic is used in number of industries on huge scales. To make products appealing they need to be colored. It would be wrong to say that where there are plastic items, there will be plastic colorants.

When it comes to lend bright and long-lasting shade to plastic products, quality of the colorant is the major factor to consider. Other important measures to buy superior quality coloring agent are strong color fastening properties, light fastness, easily dissolvable, good heat stability etc.

Some selection criteria depends upon the type of polymer(s) being colored, the type of application (such as to color products used in the food industry or other domestic food packaging needs, toys), processing temperature, method of dispersion.

Although, plastic dyes are used in industrial applications, such as nylon, acrylics, polyester, PVC, PMMA, styrene, PETP, and polystyrene monomers, but with advisements in chemical industry these dyes are also used to color several other types of materials such as to give bright and attractive shades to yarns, textiles, and interiors and exteriors in the automobile industry.

Other uses of these colorants include lend color to toys, wrappers, lunch boxes, bathroom and kitchen fittings etc.

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Get strong and brilliant color shades with basic dyes

Basic dye is a class of synthetic colorants. The unique feature of these coloring agents is that they are water insoluble. Water-soluble salts are added to these color bases to produce brilliant colors with high tinctorial values on textiles.

These dyes produce colors by reacting with material that is anionic or negatively charged. They are also called cationic dyes because the positively charged part (called cationic) of the salt is responsible to produce shades.

Basic dyes are suitable for acrylic fibers and jute. The reason is that light fastness on such materials is excellent. Besides, they can also be used to color natural fibers such as like silk, cotton, wool etc. It is important to inform you that by this colorant do not form strong bond to cotton and more likely to fade when exposed to light.

In order to produce light fatness shades the dyeing material need to be passed through a special treatment called mordanting. In this process, a substance called mortdant is added to form strong coordination with dye.

Properties of basic coloring agents are moderate substantivity, great Tinctorial strength, number of different shades, and color brightness. Moreover, they are economic than other coloring agents. With significant advancements in chemical science, basic colorants are modified to produce better light fastness for all kinds of fibers with excellent substantivity.

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How epoxy resins serve modern industry needs?

Also known as polyepoxide, epoxy resins are produced through a special curing process in which liquid polyethers are transformed into infusible solids.

These products serve various industries in various ways. For example, they are use in industrial tooling applications to manufacture castings, molds, fixtures, and laminates. Optoelectronics and dentistry, and fiber optics industry use these products after they cures through ultraviolet light.

Electronic industry use resins in the production process of insulators, transformers, switchgear, and generators. Resins play an important role in domestic applications to repair the objects like china, pottery, glass, wood, metal, and leather.

Due to their rigid adhesive properties, resins for a strong and durable bond between two joining materials. That is why they are widely used in marine applications to repair materials. It is advisable not to use these joining agents on the outermost layer of the boat. The reason is that resins deteriorate their properties due to Ultra Violet light exposure.

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Different types of epoxy resins used in residential and commercial sector

Epoxy resins, used in combination with fillers and fabrics, are one of the multipurpose materials for repair and construction jobs. It is a durable adhesive used for a variety of reasons in and outside homes. These adhesives are categorized into two forms known as glycidyl and non-glycidyl.

These two categories are further divided into different types that are as follows:
1. Adhesives
It is a robust material that sticks items together and creates strong bonding between two materials. The adhesive epoxy resins are used for different purposes ranging from fixing a ceramic item in households to using it for an array of reasons in industries.
2. Paint and coating
These types of epoxy resins protect painted surfaces and materials. The best part is that they are resistant to fire. There is a possibility that you may need to use diluted form of epoxy resin, depending upon purpose and epoxy resin you are using.
3. Sealants
Epoxies are also used as sealant material. As the name suggest, these types of epoxies are used for sealing items. The sealants are used for repairing household items, windows, and doors. The basic purpose of sealants is to fill in the damaged area and allowing it to dry.

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General properties and classification of Vat colorants

The name of “Vat” colorant come from the large wooden recipient/vessel, which was used when dye reduction and dissolving, was first performed.

  • General properties of vat coloring agents are:
  • Insoluble in water
  • Applicable for cellulosic fibers
  • Wide shades of different colors can be produces, especially, for green and blue colors
  • The class of vat dyes has most light fastness than other colorants. However, all dyes in Vat class have different light fastness properties. Highest light fastness rating of such colorants is 7 and lowest is 5 on the scale of 8. Rating 5 is better than light fastness of many other dyes.
  • Wash fastness rating of such coloring agents is 4-5.
  • During dying process, coloring agent is passed through reduction phase in which they are converted into water-soluble leuco-derivatives.

Classification of Vat Dyes:

Based on application conditions, such coloring agents can be classified as follows:

  • IN (Bayer classification)  or CI (Ciba classification) dyes (Hot)
  • IW or CII dyes (Warm)
  • IK or CIII dyes (Cold)
  • IN special dyes

Based upon chemistry, this colorant can be classified into Indigo derivatives and Anthraquinone derivatives.

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Avoiding microbes from forming colonies in your plastic products

For over a decade, the technology of inducing antimicrobial additive into plastic is into usage to improve the life of plastic products. Such additives can be both inorganic and organic in nature, which are dispersed into plastic materials in order to prevent growth of bacterial colonies and its germination in products which are used in environment vulnerable to bacterial growth.

A few examples of such environments would be marine, hospital environment, warm and other moist environment. Mostly antimicrobial additive are used in products which are prone to too much of public contact such as escalator rails, retail store settings, door handles, plastic furniture in hospital, household appliances, medical packaging products, construction applications used in railing and decking, and equipments used in food processing industry.

As per one of the recent researches, the leader in terms of applications that require anti bacterial surfacing is inorganic silver-based antimicrobials. Some new biocides and antimicrobial are also being developed for the usage in several types of plastics and resins. For a couple of decades, research is going on and resin producers are trying to develop and come up with antimicrobial polymers in plastic industry to enhance the plastic products longevity, and create an antimicrobial environment.

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Take a look at a few types of modern fabric dyes!

Earlier, textile dyes were made out of natural sources, like herb madder extracted from plants. Modern dyes are now used for coloring both synthetic and natural fibers.

Take a look at some common types of fabric dyes:

Acid dye
Its usage is common for coloring natural fibers like cashmere, wool and silk. It can also color nylon textiles. Some of these are quite toxic, while others are quite mild and safe that it can be used for coloring food also. These dyes are used as acidic solutions, in which the acid part is typically given by harmless citrus or natural vinegar.

Disperse dye
These are used for the purpose of coloring synthetic fabrics like polyester. These are not easily dissolved in water, but its molecules disperse easily in the polymer that needs to be colored. It requires temperature of around 266 degree Fahrenheit and high pressure while using it for dying purpose.

Reactive dye
These ones are used for coloring cellulose fibers like linen, cotton, or hemp. However some of these dyes are created particularly for silk and wool. It induces bright colors in fabrics, and the color does not wash out or fade away. The molecules of these dyes bond with cellulose molecules forming a single molecule.

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The most important uses of solvent dyes

A solvent dye gets dissolved in organic solvents, helps in creating a solution. It is because of non polar nature of dye that makes easy for it to get mixed with solvent. These types of dyes do not ionize easily. Ionization refers to ability of compound to change its polarity by losing or gaining an electron from another compound.

Moreover, such dyes do not dissolve in water but get dissolved completely in solvents. It means they will not form a residue. In addition to this, dyes available in yellow and red are known as azo dyes.

These types of dyes are used for a variety of reasons, out of which, the most important ones are as follows:

These dyes are used in foil printing, marking pens, printing inks, ball point pens and many more.

  • The usage of this dye is also seen in automotive industry for coloring lubricants.
  • The dyes are also used of coloring solid materials such as polyester, acetates, nylon, polystyrene and various other materials.
  • Dyes are also used for staining several structures found in cells.
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