JJI Technologies
The Leader in Flame Retardant Additives Technology
JJI Technologies


JJI offers computer makers a non-halogenated alternative

US-based JJI Technologies aims to help electronics equipment manufacturers improve their environmental profile through the use of its non-halogenated polyolefin compound technology.

The Ohio-based company has been granted a European patent [EP2045288] covering the application of non-halogenated flame retardant compounds in fully-recyclable plastic computer housings.

Computer manufacturers typically use a multitude of plastic resins, each of which may incorporate different filler levels, says JJI.

JJI's compounds are based on polypropylene, thermoplastic elastomers, non-halogenated flame retardants and performance enhancing fillers. The company says independent tests show the compounds can meet UL94-V0 requirements and can be recycled up to 5 times with minimal loss of physical properties.

JJI granted European patent for fully recyclable computer housing

According to the company, the patent covers a specially formulated polypropylene compound using proprietary non-halogent flame retardant technology that it says is ideally suited for injection molding recyclable plastic computer housings and constructions boards.

JJI Technologies (Painesville, OH) is a developer and supplier of flame retardants with its focus on environmentally friendly grades of these additives. The European patent is was granted for the material for fully recylable computer housings, EP2045288, could grab the attention of OEMs that in Europe must follow the Waste Electrical Electronic Equipment (WEEE) directives. These directives mandate that suppliers of electronic devices sold in Europe must finance the cost of treating and recovering the types of products they import, rebrand or manufacture. The products also must meet Restriction of Hazardous Substances (RoHS) directives that limit the use of brominated and halogenated flame retardants, among other substances, in some products.

In answer to PlasticsToday questions, JJI Technologies replied that the compounds used to mold these fully recyclable computer housings (see photo) can be processed on standard plastics processing machinery. Standard injection molding machines were used to mold the prototypes, with lower temperature profiles generally used to mold products containing the compound.

In addition to the recyclable computer enclosure, JJI Technologies says it has additional proprietary material technology that can be applied to internal electrical compo­nents such as wiring, connectors and circuitry allowing recovery of precious metals without using burning processes. In answer to our question on this, the company replied that it could not go into detail because of the proprietary nature of the separation process. "Technology exists where some materials can be separated and precious metals remain without mechanical chopping, grinding or burning," added JJI.

JJI Technologies says it is in discussions with manufacturers and retailers regarding the technology, and is seeking parties interested in licensing the material technology for incorporation into product manufacturing.

Additives: Bio-based polymer modifier provides FR, enhanced properties

A group of patent-pending bio-based polymer modifiers reportedly enhance flame retardancy and add flexibility to otherwise rigid plastic products. JEMINI 100 is the first in a line of non-halogen flame-retardant additives that are RoHS, WEEE and REACH compliant. Described as an “agri-derived liquid”, JEMINI 100 modifiers are ignition resistant, thermally stable up to 280oC, and allow high loadings of fillers in compounds, many of which cannot be processed without the addition of a modifier.
Bill Hamilton of JEMINI developer JJI Technologies, told MPW that he couldn’t divulge the exact composition of JEMINI 100, but said that more than 90% of it is derived from naturally occurring substances. “While it is not a flame retardant itself, it does not add to the fuel load like other polymer modifiers, which are mineral based,” Hamilton explains.

While mineral-based flame retardants can impact physical properties, making compounds brittle in some instances, JEMINI 100 is said to improve elongation, flex modulus, and impact resistance due to its plasticizing effect. The JEMINI line was originally developed as a way to impart superior flexibility to non-halogen flame retarded polypropylene wire and cables, without compromising the flame rating or other key properties.

Hamilton says the modifiers have thus far been used with PE and PP, with the liquid injected directly into the barrel, although JJI believes it could also be added at the feedthroat. Letdown rations have ranged from 2-5%, depending on the application and desired result, whether it’s process improvement or enhanced magnesium hydroxide flame retardant performance.

Speaking to MPW in early November, 2009, Hamilton said JEMINI 100 was at that time in the final stages of commercialization. Several companies were using it in scale-up situations involving highly filled materials such as magnesium hydroxide, he added.

JJI Technologies, Painesville, OH, USA

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