Swirl mat

Karger-Kocsis J (1991) Environmental stress corrosion behavior of polyamides and their composites with short glass fiber and glass swirl mat. Polym Bull 26(1 ) 123—130... 

Figure 5.18 Glass fiber swirl mat/TS polyester RP hand lay up boat shell...

Superior mechanical properties, including impact strength and resistance to delamination, are claimed for reinforced plastics made from three-dimensional fabrics [1], Other reinforcement forms include continuous swirl mat, designed to have a minimum of fibre ends, and hybrid fabrics containing two different reinforcing fibres, for example, glass and aramid. There are many different ways in which two different fibres can be combined together. 

Surface veils are lightweight thin surfacing materials usually constructed from swirl mats either in glass or from a synthetic fibre. Their main use is to act as a decorative surface, shielding from view the texture of the underlying structural reinforcement. But they also may be used in conjunction with gel coats for added support. C-glass surface veils are... 

Figure 2 Wohler curve (S -Nf) for a unilaterally compression-molded GMT-PP with 40wt.% glass swirl mat reinforcement. Note the following testing conditions were set R = 0.1, /= 5 Hz, T = 30°C (DFG Ne 546/5-1, 17]).

Abdel-Tawab K, Weitsman Y (1998) A coupled viscoelasticity/damage model with appliea-tion to swirl-mat composites. Int J Damage Mech 7 351-380... 

Abdel-Tawab K, Weitsman YJ (1998) A Coupled Viscoelasticity/Damage Model with Application to Swirl-Mat Composites. International Journal of Damage Mechanics 7(4) 351-380 Biot MA (1954) Theory of Stress-Strain Relations in Anisotropic Viscoelasticity and Relaxation Phenomena. Journal of Applied Physics 25(11) 1385 Callen HB (1960) Thermodynamics. Wiley, New York... 

Smith L, Weitsman Y (1999) The visco-damage mechanical response of swirl-mat composites. International Journal of Fracture 97(1) 301-319... 

Fig. 7.6 Allowable levels of stress for swirl-mat, glass fiberAirethane cranposites for various durations of sustained loading vs. temperature (a) dry (b) immersed in distilled water. Note the reduction, by about 40%, attributed to distilled water (after Comm et al. 1998)...

Continuous strand mat or swirl mat is similar in some respects to CSM, except that the fibers are continuous. Swirl mat is used in pultmsion, where the reinforcement is required to have sufficient integrity to allow it to be pulled through the process under tension. The glass can also be woven to form a glass cloth with various weaves such as plain, satin, or twill. 

Fiber mat A fibrous material used in RPs consists of randomly and uniformly oriented (1) chopped fibers with or without carrier fibers or binder plastics (2) short fibers with or without a carrier fabric (3) swirled filaments loosely held together with a plastic binder (4)... 

Reinforcing mats Chopped strand or continuous swirl Chopped strands or continuous strands oz. to 3 oz./sq. ft. Mechanically bonded 2 oz. to 10 oz./sq. ft. Not representative unless compressed 1-1/2-2- /2 Open mold Coining Resin transfer molding Laminates Bag molding Foam molding Stampable... 

Continuous strand mats are produced by continuously depositing the uncut strands in a swirling pattern onto a moving belt where a binder is applied. Continuous strand mats exhibit better physical properties than cut strand mats, but the material is less homogenous. Continuous mats vary in weight from 0.75 to 4.5 oz./ft. and are available in widths up to 6 ft. 

Continuous Filament Mat (CFM)—A non-woven material similar to chopped strand mat except that the fibres are swirled at random and are continuous. 

Mat—A fibrous material consisting of randomly orientated chopped or swirled continuous filaments loosely held together with a binder. 

P(l) CFM may be used as an alternative to CSM. Properties and application potential are similar to CSM. CFM is a non-woven material similar to chopped strand mat except that the fibres are swirled at random and are continuous. The swirled strands are interlocked with a binder. The user should check with the supplier on the compatibility of the binder for a specific resin system. 

This is made from continuous swirls of fibre strands and has some advantage over chopped mats in that there is continuity of fibres, which are interlocked albeit still in a random array. The overall nature is still similar to chopped fibre mats, continous filament mats but are more open and springy and their structural use is again limited. They are however used in pultrusions in combination with rovings and fabrics. 

Mat A fibrous material for reinforced plastic use consisting of randomly oriented chopped filaments or swirled filaments with a binder. 

Stoney George Johnstone 6 Straub John 156 Struzhkin Victor 827 Stwalley William C. 510 Suhai Sandor 486 Sun Cheng E. 764 Svensson Mats 309 Swirles Bertha 502 Sylvester James Joseph 333 Syrian Yakov Kivovich 524 Szabo Attila 426,565 Szalewicz Krzysztof 134, 135, 269, 270, 510,511, 717, 725,729,730 Szymahski Slawomir 52... 

Continuous glass-fibre filaments are laid down in a swirl pattern to form a mat. The filaments are loosely held together with a resinous binder. 

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