Composite comprising organic fibers having low twist multiplier and improved compressive modulus
A technology of compression modulus and twist coefficient, applied in the field of two-layer cord fabrics, products or product components, can solve the problems of not talking about cord structure, reinforcing cords, etc.
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[0087] Comparative cords A, B, C, D, E, F and G, and starting PEN cords 1-6 (inventive examples)
[0088] A series of cords differing in polymer composition and cord construction was prepared. Each series is intended to illustrate the relationship between twist modulus and cord properties for each polymer type. Comparative cords A, B and C were made from commercially available aramid yarns. Comparative cords D, E and F were made from commercially available PET yarn. The PEN yarns for starting PEN cords 1-6 were obtained by using Allied Signal's commercially available PENTEX TM made of yarn. The initial tensile modulus and initial compressive modulus were measured for each of these cords. These data are listed in Table I along with the stress at 1% strain.
[0089]
Embodiment 7-11
[0101] Embodiment 7 of the present invention is also a two-layer cord belt with the same structure as Embodiment 1-6 of the present invention, and figure 1 Similar, but in the unidirectional prepreg sheet, the starting PEN cord 2 was used at 26 EPI. The ply application angle is 28°.
[0102] Embodiment 8 and 9 of the present invention are all with figure 2 A four-ply composite reinforced with RFL-coated starting PEN cord 5 similar to that described in . In both examples, the outer plies 19 and 25 exhibit an angle of ±23° and the PEN cords are 21 EPI per ply. In both cases, the two sandwiched plies 21 and 23 present an angle of ±45°. In Invention Example 8, the PEN reinforcement was 4EPI per ply, while in Invention Example 9 it was 8EPI. In both embodiments of the invention, the sequence of the plies when constructing the laminated composite is -23° / -45° / +45° / +23°.
[0103] Embodiments 10 and 11 of the present invention are three-ply belts, with image 3 similar to that ...
Embodiment 12-15
[0110] The effect of simply introducing a third dimensional reinforcement into Example 1 of the present invention is revealed through the use of stitching. By using the same cords as used for the reinforcing material of the rubber, the starting PEN cord 5, stitching was carried out over the entire surface of the composite, as in the inventive examples 12-14. Inventive Example 15 was stitched by using PEN cords having a cord construction of 1000 / 2, 7x7 and a true denier of 2400. All four inventive examples were stitched at 3 rows / inch and the stitch angle was 45° relative to the circumferential tangential axis of the belt. Embodiment 12 of the present invention uses and Figure 4 A similar continuous chain stitch in . Embodiment 13 of the present invention uses and Image 6 Similar cross stitch in. Embodiments of the present invention 14 and 15 use and Figure 5 A similar Z-stitch in. The seamed laminate was then cured at 150°C for 30 minutes under 100 psi pressure. The ...
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Abstract
Description
Claims
Application Information
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