Dyneema UD66

Aids to accuracy
Angle Cosine Indicator (ACI)
A.R.M.S. Inc
Ballistic materials
Bipods -Snipersystems Mil Spec Tilting
Black Shadow gun coating
Boxes and slips
Christensen Arms
DSR sniper rifles
Ghillie suits
Golight remote controlled lamps
Hawkeye borescopes
Horus Vision ATRAG software
Lynx scopes
Niedermeier rifles
NiteMax Digital Night Viewer
Pfeifer-Waffen Handy Hunter rifles
Second hand /new bargains
Schmidt and Bender PM11
Stradivari bullpup
Snipersystems Case Catcher
Snipersystems Gun Lights
Snipersystems Cyclops Head Torch
Shepherd scopes and binoculars
Snipersystems Trigger Pull Gauge
Tarbot remote controlled target
Voere rifles

Type HB1
1250mm wide
We have 6 full boxes
each containing four rolls 500 metres long
and weighing approx 445 kilos, each box
There is also an opened box containing 3 rolls.

Click on picture to enlarge

Dyneema fabric will stop bullets

From: High Performance Plastics |Date: March 1, 1992

The Dutch group DSM has developed a nonwoven fabric, 'Dyneema UD66', for use in bullet-resistant vests. Made from DSM's 'Dyneema SK66' gel-spun polyethylene fibre, the fabric is claimed to be extremely effective at stopping bullets ...

Reference 1

Developments in design of ballistic protective systems - III

Design of ballistic protection system depends on the threat level of the victim, says Dr A K Rakshit and M A Hira

UD - 66

UD stands for ‘uni-directional’ in Dyneema (UHMPE) yarns. In UD all the fibres are laid parallel, in the same plane, rather than being woven together. Dyneema UD is made of several layers of Dyneema fibres, with the direction of fibres in each layer at 90 to the direction of the fibres in the adjacent layers. The uni-directional configuration of the fibres in Dyneema UD allows the energy transferred from the impact of a bullet or other threat to be distributed along the fibres much faster and more efficiently than in conventional woven fabrics. This is because the absorption power of the yarn in woven fabrics. This is because the absorption power of the yarn in woven fabrics is poor at the crossover points, as these points reflect rather than absorb the shockwaves of the impact. In Dyneema UD, much more of the material is engaged in stopping the bullet, making it more effective against ballistics.

Reference 2


Colloque C8, supplkment au Journal de Physique III, Volume 4, septembre 1994


Analytical modelling of composite panels subjected to impact loading

C. Navarro, J. Rodriguez* and R. CortCs*

Department of Engineering, Carlos 111 University, Avda. de Butarque 15, Legangs, 28911 Madrid, Spain * Department of Materials Science, Polytechnic University of Madrid, E.T.S.J. de Caminos, Canales y

Puertos, Ciudad Universitaria sln, 28040 Madrid, Spain


To illustrate the model prediction capability, the problem of a 9mm Parabellum projectile impacting

against a 34 layer polyethylene fibre composite with an elastomeric matrix is analyzed. The composite is

fabricated by DSM and its commercial name is Dyneema UD66. Following the manufacturer's information

the fibre density is 970 kg/&, the areal density of a ply is about 0.166 kg/&, and the number of fibres per

centimetre is 5.9. In Table 1 the results of the predictions are compared with some manufacturer's data [6],

for the impact problem on a composite of areal density of 5 kg/m2 at two projectile velocities below the

ballistic limit. Predictions are made at each velocity for two different impacts, case A corresponding to a

projectile radius of 4.5 mm (standard radius of the projectile), and case B for a radius of 6.0 mm (typical

value of the radius of the considered projectile after impacting a composite target).


It was also analyzed the problem of a 7.62*51 Ball projectile at 820 m/s impacting 150 plies of a

Dyneema UD66 composite 25 mm thick. Experimentally the projectile is defeated by the composite armour.

In applying the engineering model it was necessary to assume a maximum breaking stress corresponding to a strain in the composite about 6.46 %, which greatly exceeds the maximum static strain that this material can support although dynamic tests carried out using a Hopkinson Bar device lead to values of the critical strain close to 5 %.


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