Polyolefin fibres and their use in the preparation of nonwovens with high bulk and resilience
A polyolefin and non-woven fabric technology, applied in the direction of single-component polyolefin artificial filament, fiber type, fiber treatment, etc., can solve the problems of improving or not realizing the bulkiness of polyolefin non-woven fabrics
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Embodiment 1
[0129] The bulk and elasticity of various fibers and their corresponding nonwovens are given in Table 1 below.
[0130] As can be seen from the data presented in Table 1, among others, many parameters have an influence on the bulk and elasticity of fibers and nonwovens: the type of matrix polymer used, the spin oil applied during the stretching process agent type and draw ratio. Two other parameters were also measured, fiber / fiber friction and fiber crystallinity, which also depend to some extent on the type of matrix polymer used, the degree of spin finish applied during the drawing process, and the degree of fiber crystallinity. type and stretch ratio. Therefore, the bulkiness and elasticity of fibers and nonwovens depend directly on the type of matrix polymer, the type of spin finish, the draw ratio, and indirectly on fiber / fiber friction and crystallinity, for example these properties are only Reflects the type of matrix polymer used, the type of spin finish used and the...
Embodiment 2
[0144] Table 2 Provides maximum bulk to selected fibers and nonwovens
[0145] As can be seen from Table 2, special attention should be paid to sample numbers 1 and 4. Sample No. 1 included conventional PPH 7059 base polymer (no nucleation) and conventional spin finish GF602-c, while Sample No. 4 included nucleated Adstif HA840R base polymer and Synthesin 7490 FILL spin finish. Comparing these two samples, it can be deduced that Sample No. 4 exhibited a nonwoven bulk value that roughly corresponds to a 164% increase (28 cm 3 / g-74cm 3 / g). According to the present invention, and without being bound by any one particular theory, it is believed that the dramatic jump in bulk is produced by the combined use of a nucleating homopolymer (Adstif HA840R) with Synthesin 7490 FILL spin finish, This produces highly crystalline and rigid fibers, and the combination also produces fibers with surprisingly low fiber / fiber friction, which in turn provides advantageously high loft n...
Embodiment 3
[0147] Table 3 shows the effect of bonding temperature on bulk and elasticity. For the nucleated Adstif HA840R base polymer comprising Synthesin 7490FILL spin finish, the most favorable bulk was obtained at a bonding temperature of 140°C.
[0148] bulkiness cm 3 / g
[0149] Table 3 Effect of combining temperature on bulkiness and elasticity
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