Long fiber filler orientation technology
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Long-fiber filler orientation technology

Long-fiber Filler Orientation Technique

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Weld line can be eliminated We have succeeded in controlling the orientation of fillers. With this technique, various weld line issues, such as deterioration in strength, deformation due to uneven shrinkage, and color streaks, can even be eliminated, contributing the beauty of product surfaces, while making the tensile strength of weld line extremely high.

Breaking test of weld line On the picture, resin was injected from gates at both ends, and the weld line was located at the center of the test piece. With the standard molding, breakage occurs right at the weld line, whereas, with our filler orientation technique, weld line stayed intact. In fact, the tensile strength was about five times stronger on the portion where our innovative technique was applied.

Test pieceISO dumbbell Type A1 multi-purpose test piece (t=4)
MethodISO 527-1 and 527-2 test standards
Test speed:5mm/min. n=5
EnvironmentMeasured dry at 23 degrees celcius and 50% RH
MaterialResin PA6 with CF30wt%
TORAYCA TLP1060 from Toray: Carbon fiber 30wt%, long fiber pellet
No weld (1 gate) test piece. Tensile strength on Toray catalog specs: 280 MPa
Results Average tensile strength of 288.63 MPa with the maximum tensile strength of 310.00 MPa was achieved.

288.63 MPa well exceeds 280 MPa, the strength of original test piece without any weld. Strength of normal products having a weld line is only 57 MPa. Our products have proven to be five times stronger than the ones with a normal weld.


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