Intermingled multifilament yarn comprising high modulus monofila

Details Intermingled multifilament yarn comprising high modulus monofila Intermingled multifilament yarn comprising high modulus monofila

1991-04-26

1994-03-15

Crowder, Clifford D.

Textiles: manufacturing

Thread finishing

Surface modification of running length

428267, D02G 116

Patent

active

052936767

ABSTRACT:
There is described an intermingled multifilament yarn comprising high modulus monofilaments made for example of aramid, carbon or glass and a process for producing this yarn. Conventional air intermingling is impracticable for high modulus yarns since they tend to break, because of their brittleness, which leads in particular to an appreciable reduction in the tenacity. The invention proposes carrying out the intermingling at elevated temperature--either by preheating the yarn or by heating the intermingling air. It is found, surprisingly, that, although the entanglement spacings are relatively low, the tenacity remains substantially unaffected and in some instances is even raised. The multifilament yarn produced by this process is noteworthy in particular for the low number of broken monofilament ends. The invention can also be applied to commingled yarns, yarns which are part high modulus filaments and part thermoplastic filaments.

REFERENCES:
patent: 2985995 (1961-05-01), Bunting, Jr. et al.
patent: 3069836 (1962-12-01), Dahlstrom et al.
patent: 3069836 (1962-12-01), Dahlstrom et al.
patent: 3083523 (1963-04-01), Dahlstrom et al.
patent: 3950831 (1976-04-01), Bauer et al.
patent: 3958310 (1976-05-01), Blanc
patent: 3959962 (1976-06-01), Wilding
patent: 4025595 (1977-05-01), Mirhej
patent: 5054174 (1991-10-01), Kremzer
Chemiefasern/Testilindustrie (Industrie-Textilien), 39/91.Jahrgang, Jul./Aug. 1989.

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