Toner formulations

Oil-less type of image forming devices have been developed that do not use release oil in the fixing device. Instead of using release oil, a release agent like wax is added in large amounts within the toner formulation. 

PVB is also used in toner formulations as a binder (19,120). PVB is added to the formulations to increase viscosity, to improve film integrity over the fuser roll, and to prevent blocking. The overall toughness of PVB enhances the integrity of the toner during the milling process and extended machine operation. This minimizes the level of fines without detracting from the flow properties. 

Flexographic Inks. Fluorescent toners such as the Radiant GF, Lawter HVT, and Day-Glo HM and HMS Series toners are used in flexographic ink formulations. These products are soluble in blends of alcohol (80%) and ester solvents (20%) and are compatible with modifying materials such as nitroceUulose resins and acryHc solution polymers. Flexographic inks of this type are used most commonly to print products such as ceUophane and polyethylene film for packaging, and also to print paper products such as gift wrap and price labels. 

Water-based flexo inks can be formulated with either a soluble toner or with the Day-Glo EPX Series which is a tme pigment and can be formulated like a conventional pigment dispersion. The Radiant Aquabest or the Day-Glo WST can be formulated in an alkaline water-soluble system to yield strong inks. They have limited shelf life and inferior fade, but do not necessarily requite additional binder. Day-Glo EPX must be formulated with a binder such as a hard resin or can be used with one of the soluble toners such as WST. The EPX Series has several advantages over soluble toners such as much superior fade, exceUent ink stabiHty, and some hiding power over kraft-type papers. A disadvantage of the EPX is its lower tinctorial strength than other fluorescent toners. 

I tjzoIo[ 1,5-/] [1,2,4] triazole azomethines were investigated and used for manufacturing of inks, optical filters, thermal transfer printing materials, and toners. Some of them were prepared and formulated into a water-thinned jet printing ink <2002JAP256164, 2000EUP1035172>. 

Typical formulations of oil-less toners utilizing COCs are shown in Table 2.5. The compatibility with other resins and the pigment dispersibility can be improved by introducing carboxyl groups into the COC by the fusing air oxidation method, maleic anhydride modification, or acrylic acid modification (53). 

Use of red iron oxide in plastics has increased as cadmium reds and lead molybdate oranges have been restricted in their use. In combination with the appropriate organic red toners, red iron oxide can be used to cover some of the same color space formerly occupied by cadmium- or molybdate-containing formulations. The red iron oxide component of the organic-inorganic approach also lowers the cost of the formulation, opacifies the formulation, and offers an increment of UV stability to the formulation. 

Additive for paper making and coating, release coating and modification, toner treatment (surface effects), additive in PSA formulations. 

Many industrial materials today are composed of a coating of one material on a second material. Toner particles for copy machines are one example coated time-release drug formulations are another example. The DP 1000 easily distinguishes coated particles... 

---