ARMOR MATERIALS WE USE
- Spectra®Performance Materials
The Shield Technology Revolution
Shield Technology - developed and patented by AlliedSignal Inc. as an entirely new way of making non-woven fabrics and reinforcing composites - is contributing to a materials revolution across a variety of industries and applications. Whether the demand is for the ultimate in performance at any cost for superior effectiveness at a value price, Shield Technology is answering the call.
The revolution started with the Spectra Shield, which uses AlliedSignal's super-strength Spectra polyethylene fiber, and continued with Gold Shield, which employs high-strength aramid fibers. Today the diversification of Shield Technology through the replacement of woven synthetics or other composites with various synthetic yarns is pioneering new heights in performance value. The successful use of lower-cost synthetic fibers in our proprietary Sheild Technology heralds a new generation of performance-enhanced materials - from "value priced" armor systems to sporting goods for consumers , to flexible composites and wrappings for transportation, air bags, oil field equipment, environmental recovery systems and geo textiles.
Spectra Shield came about when scientists and engineers at Allied-Signal were searching for a construction that would preserve the full strength of the Spectra polyethylene fiber. The normal weaving process is detrimental to any synthetic fiber: the bending and flexing that occurs in weaving reduces the characteristic molecular alignment that gives synthetics their strength.
Driven by the need for high-performance ballistic protection, a team from the Spectra Performance Materials (SPM) group originated Shield Technology and launched Spectra Shield - the first non-woven ballistic composite. With Shield Technology, all the strength of the synthetic filament is maintained: the fibers are simply unwound and then spread side-by-side in a resin-locked composite structure.
What is Shield Technology ? Shield Technology lays the parallel strands of synthetic fibers side-by-side and holds them in place with a thermoplastic resin, creating a unidirectional tape. Two layers of the tape are then cross-plied at right angles (0 degrees/90 degrees) and fused into a composite structure under heat and pressure. The cross-piled unidirectional panels are then pre-consolidated into rolls (called PCR), which are used to make the finished product. Among its many great advantages, Shield Technology lowers the manufacturing costs. For example, no water repellent treatment is required, and it can be cut and laid-up in a composite.
In the manufacture of soft body armor, Shield rolls are laminated with two layers of thin, flexible, transparent film, which helps protect the composite structure from moisture, dirt, abrasion and other environmental stresses that could interfere with the performance of the yarns. (These are the LCR versions of Shield products.) This protection works so well that Gold Shield products are vastly superior to standard aramid fibers, which are not resistant to moisture, abrasion, etc.
PCR rolls are used to fabricate hard composite structures, radomes, and other multi-curvature and multi-axial structures by applying heat and pressure. In the future, Shield Technology will make possible a thermoset resin roll product for a more rigid composite.
A unique resin system is used for each Shield fiber type and application. For Shield products, thermoplastic resins provide flexibility for soft body armor and fabric replacements. Thermoset polymer resins are used in hard composites to provide rigidity, higher temperature endurance and abrasion resistance. Blended resins are used for certain fiber applications that require a unique characteristic, such as stiffness, moldability, and multi-combination materials.
Spectra®Shield is a non-woven ballistic armor material incorporating Spectra fibers. It is the strongest, lightest weight ballistic armor material in the world. Spectra®is used as the reinforcing fiber in a flexible thermoplastic resin. This material uses two layers of unidirectional fibers bonded with resin at 0 and 90 degree orientation.
Spectra Shield uses two plies of unidirectional material laminated together with a low density polyethylene film. This thin nonwoven is then cut and stacked like traditional ballistic fabrics.
Our woven ballistic fabric relies on air entangled Spectra Fiber. This air entanglement process interlocks the fiber within the yarn allowing improved bullet to fiber engagement. These un-twisted fibers lay flatter than traditional twisted fiber, which in turn allow the fibers to fit closer together while woven.
Spectra Fibers Lightest and strongest manmade fiber. Pound for pound 10 times stronger than steel, light enough to float, tough enough to resist chemicals, water, UV and the wear and tear from abrasion
Spectra advanced ballistic fabrics Outstanding ballistic performance, thanks to Spectra Performance fiber and significant improvements from Spectra Performance Materials applications engineering, in association with leading weavers.
Exceptional protection against high-velocity, multi-hit impacts. The original non-woven ballistic composite, Spectra Shield pioneered Shield Technology and revolutionized soft and hard armor worldwide. Leading Spectra Shield products include:
Spectra Shield LCR, in roll form for soft body armor. Here the cross-plied tapes are laminated between thin films of polyethylene to protect the composite structure.
Spectra Shield PCR, also in a roll form. This prepreg composite structure is ready to be formed by compression molding or autoclaving. The material is used in hard armor for land, air and sea vehicles, as well as in architectural armor applications.
Spectra Shield VE, formed by specially treating Spectra Shield LCR. This product delivers full ballistic protection in a softer, more flexible, non-woven fabric that is ideal for making more comfortable, "wearer friendly" personal armor. SpectraFlex™ is a ballistic armor material that combines "all the performance of Spectra Shield with all the comfort of traditional wovens." SpectraFlex offers no compromise in performance while providing ultimate comfort to officers on the street. Through a special process, tactile softness is added to the Spectra Shield product. As a result, it has the feel and softness of woven ballistic fabric while preserving its superior Spectra Shield® performance.
An advanced non-woven ballistic composite with enhanced Spectra Fiber processing and a restructured Shield Technology yield the highest performance and highest comfort values.
Gold Shield Aramid fibers transformed through Allied Signals patented Shield Technology, to form a ballistic material that performs well under high-heat conditions. For flexible and hard armor. Gold Shield uses aramid fibers to create three types of ballistic Shield products: > 1. Gold Shield LCR. This soft body armor material is comprised of rolls of unidirectional aramid fibers that are cross-plied and laminated with thin films of polyethylene. Gold Shield delivers higher performance than ballistic fabrics of woven aramids. 2.This soft, flexible Shield composite is engineered for added flexibility, providing wearer-friendly comfort on body armor while retaining full ballistic performance. 3. Gold Shield PCR. is composite hard armor prepreg of aramid fibers has the added benefits of semi-structural composite strength and ballistic performance that is superior to any composite made of woven aramid material.
4 plies of fiber and resin with thermoplastic film to protect the composite package. GoldFlex A premium, Flexible Gold Shield LCR, ideal for body armor with built-in comfort, while maintaining superb performance against high velocity steel jacketed rounds. Applications
For soft body armor: GoldFlex exhibits superior stopping power against hard, fast rounds while retaining similar multi-hit, angle shot and trauma reduction features standard to Spectra Shield LCR Product Uniderectional aramid fiber impregnated with a proprietary resin matrix, crossplied in a (0 /90 , 0 /90) orientation and sandwiched in a thermoplastic film.
0.5"............................ ..1.600m + 0.0006m
Length (nominal).........219 yds.............................. ....200m
Areal Density...............6.73 oz/yd2 (+ 0.06 oz/yd2 )...228 g/m2 (+ 2 g/m2)
Areal Density........................ASTM D3776-85
All lots meet Spectra Performance Materials Quality Standards.
All lots are tested to meet or exceed ballistic performance standards.
Spectra and Spectra Shield are registered trademarks of AlliedSignal, Inc. SpectraFlex Gold Shield, GoldFlex and Spectra Shield Plus are trademarks of AlliedSignal, Inc.
KEVLAR® is one of the most important manmade organic fibers ever developed. Because of its unique combination of properties, KEVLAR® is used today in a wide variety of industrial applications. KEVLAR® para-aramid fibre possesses a remarkable combination of properties that has led to its adoption in a variety of end-uses since its commercial introduction in the early 1970's. fibres of KEVLAR® consist of long molecular chains produced from poly-paraphenylene terephthalamide. The chains are highly oriented with strong interchain bonding which result in a unique combination of properties.
- Excellent Ballistic Performance at Low Weights
- Excellent Friction and Wear Performance Against Other Materials
- Excellent Resistance to Cuts and Protrusion combined with Comfortable Wear
General Features: High Tensile Strength at Low Weight Low Elongation to Break High Modulus (Structural Rigidity) Low Electrical Conductivity High Chemical Resistance Low Thermal Shrinkage High Toughness (Work-To-Break) Excellent Dimensional Stability High Cut Resistance Flame Resistant, Self-Extinguishing 3rd generation DuPont Kevlar 129 offers balance of low weight and bulk, high flexibility, concealability, fit and performance. KEVLAR®, NOMEX® and TEFLON® Fibre are DuPont registered trademarks.