Browse Prior Art Database

Toners Containing Solid Solvent

IP.com Disclosure Number: IPCOM000074434D
Original Publication Date: 1971-Apr-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Chang, LS: AUTHOR

Abstract

The increasing throughput requirements of copying or duplicating machines calls for high-speed toner fusing, i.e., toner requiring less power and/or less resident time to achieve complete fusing. To solve this problem, a crystalline compound or solid plasticizer is introduced into the toner composition as a physical add-mixture in the form of finely ground particles during the Wiley mill or the final jet mill pulverizing step or blended in subsequent to grinding.

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Toners Containing Solid Solvent

The increasing throughput requirements of copying or duplicating machines calls for high-speed toner fusing, i.e., toner requiring less power and/or less resident time to achieve complete fusing. To solve this problem, a crystalline compound or solid plasticizer is introduced into the toner composition as a physical add-mixture in the form of finely ground particles during the Wiley mill or the final jet mill pulverizing step or blended in subsequent to grinding.

The required characteristics of the crystalline compounds or solid plasticizers are that these must be of low melting (higher than the machine operating temperature) and that the compounds when melted are solvents for the constituents. The material must be pulverizable in the process to be used, and finally the incorporation of the solids in the composition must not jeopardize the triboelectric polarity relationship between the toner and the carrier (for whatever carrier is used).

In a preferred embodiment the particle size of the solids (solid solvent) is considerably smaller than that of the toner particles. These solid particles are blended-in with the toner in such a manner that they partially cover the periphery of toner particles. In the laboratory preparations of the toner compositions, the low melting solids were added to IBM toner (Part #1162013) and Vortex Billed for 15 minutes to obtain good dispersion. The toner composition is mixed with red bead carrier in 1%...