Pullwinding

The pulwinding technology is similar to pultrusion, but pulwinding profiles have much better strength and stiffness than pultruded profiles, especially at tansversal direction because there is roving at both longitudinal and transversal direction, so they are suitable to be used as loading structural profiles. The cost of pulwinding product is 20~30% more expensive than pultruded profiles because of more complicated process.

Pulwinding poles can be widely used in electrical poles, light poles and transportation high pressure pipes.


Filament winding

Filament winding is best suited for medium to large diameter parts of longer lengths, for example 1" through 24" diameter structures with lengths from 10' to 20'. It is also the most automated process for producing tubing and tanks and is therefore best suited for higher quantity production runs.

1.Impregnated with epoxy resin (in situ)
2.Wound onto a mandrel via precise CNC control at various angles
3.Externally pressurized for compaction and then
4.Heat cured to solidify


Mechanical Properties Comparison
Manufacturing Method Pullwinding Filament Wound
Fiber volume content 58 v-% 50 v-%
Fiber weight content 75 w-% 85 w-%
Water absorption <2 w-% <1 w-%
Fibre Type Glass fibre Glass fibre
Stiffness 35 GPa 50GPA
Bending strength > 450 MPa 276-552 Mpa
Tensile strength > 500 MPa 345-1035 Mpa
Density 1.9g/cm³ 1.89-2.27g/cm³

 Products and Details
Please contact us to get more information about pullwinding.