초록 ▼

A halogen free fire resistant RF transparent polymer pallet has attenuated electrical resistance. A pallet body has a fire resistant layer and a substrate supporting the fire resistant layer. The fire resistant layer includes fire retardant materials, such as Al(OH)3, Mg(OH)2, intercalated graphite,

A halogen free fire resistant RF transparent polymer pallet has attenuated electrical resistance. A pallet body has a fire resistant layer and a substrate supporting the fire resistant layer. The fire resistant layer includes fire retardant materials, such as Al(OH)3, Mg(OH)2, intercalated graphite, zinc borate, and antimony oxide. The substrate is substantially free of the fire retardant materials to reduce the density and the electrical resistance of the pallet body. The fire resistant layer is substantially thinner than the substrate to lower RF distortion effects on RF transponder communications from additives and the conductive materials within an RF tracking system.

대표청구항 ▼

I claim: 1. A pallet structure for lowering resistance to radio frequency signals comprising:a thermoplastic pallet body including a first member having an exterior fire retardant layer and an internal support layer and a second member having a fire retardant layer and a support layer,said fire reta

I claim: 1. A pallet structure for lowering resistance to radio frequency signals comprising:a thermoplastic pallet body including a first member having an exterior fire retardant layer and an internal support layer and a second member having a fire retardant layer and a support layer,said fire retardant layer including a first polyolefin material and fire retardant fillers that provide an average peak heat release rate of less than 500 kW/m2 with a heat flux of 35 kW/m2, said fire retardant fillers reducing the strength of radio frequency signals,said support layers including a second polyolefin material with additives that do not reduce the strength of radio frequency signals,a RF transponder having a preselected identifier for identifying the pallet within a RFID network positioned in said pallet body,said pallet body having a lowered resistance to radio frequency signals communicated between the RF transponder and a RF interrogator because the fire retardant fillers are not provided in the support layers, andsaid fire retardant layer and said support layer being substantially halogen free.