Polypropylene filaments

Polypropylene filaments, fibres, fabrics for carpeting, carpet backing. 

Polypropylene filaments, fibres, fabrics, partially and fully oriented yarns perform well in cordage, netting, woven bags. .. 

Twintex R PP (from Saint-Gobain) is a roving composed of commingled E-glass and polypropylene filaments. It is suitable for filament winding and pultrusion. Consolidation is achieved by heating (180-230°C) under pressure. 

L.S. Penn. B. Miller J. Colloid Interface Set 78 (1980) 238 WB, using single polypropylene filament probe other liquid, ethylene glycol. 

Table 3.1 presents the worldwide production of polyolefin fibers in 1996 2002, according to Fiber Organon [1]. In 2002, the total production of polyolefin fibers grew to 5.913 million tons (MT). The annual rate of growth was 2% as compared to 8% for polyester, 6.4% for PAN, and 4.4%i for polyamides. The production of polypropylene fibers, excluding fibrillated fibers, reached 3.99 MT in 2002 and 4.20 MT in 2003. About 70% of its production was in filament yarn and 30%i in staple. As Table 3.1 also shows the portion of polypropylene filaments increased from 40.4%i in 1996 to 45.5%i in 2002, while fibers from fibrillating film decreased from 35.2 to 32.5%i. The portion of ST remained steady at 22.1%. 

Physical Properties of Polypropylene Filaments Drawn in an Oven at 130-135 C... 

ELS, a British company, developed a two-step process while Fare, an Italian company, pursued a one-step method. Both processes produced high-strength polypropylene filaments with a highly oriented a-monoclinic crystalline structure, an elongation of 16-20% and breaking strength of 75 and 65 cN/tex, respectively. 

Mitsubishi Corp. has developed a Rovalpolypropylene fiber with good antistatic, anticorrosive, and color properties. It can be woven into carpet for computer rooms. Courtaulds Corp. invented an electrically conductive polypropylene fiber that has excellent chemical resistance. Unlike surface-treated conductive fibers, this polypropylene fiber provides uniform electrical conductivity across its filament. These conductive fibers are now offered in multifilament and monofilament forms at 12 and 18 tex. An antistatic polypropylene fiber of fine denier was also invented by researchers at East China University of Science and Technology, Shanghai, China. It can be used in domestic polypropylene carpets. With hypothermal agglomerates, it can be prepared in partially oriented polypropylene filament yarn for use in antipollution, antistatic applications such as work clothes for operating personnel in oil, chemical, and electronics industries [230,231]. 

The variation of compliances with draw ratio for cold drawn polypropylene filaments examined at 20°C appeared very similar to that of high density polyethylene, with an increase in all compliances but Sii, which was insensitive to draw ratio. Ward aggregate theory was not applicable except for low draw ratios, implying that other processes intervened in addition to an orientation of pre-existing units. It was probable that even above the glass transition temperature increasing orientation led to a reduction in molecular mobility, as was known to occur in polyethylene terephthalate. ... 

Sheehan, W.C. Cole, T.B. (1964). Production of super-tenacity polypropylene filaments. JApplPolym.Sci, Vol. 8, Issue 5, 2359-2388. 

Yang, X. and X. Ding (2006). Prediction of outdoor weathering performance of polypropylene filaments by accelerated weathering tests. Geotextiles and geomembrances 24, 103-109. 

Polypropylene nonwovens or yams are produced by extruding a mixture of polypropylene and P-nucleating agent or certain clarifiers to form the improved polypropylene filaments." The P-nucleating agent comprises at least one of N, N -dicyclohexy 1-2,6 naphthalene dicarboxamide and NJ-Star NU-lOO from Rika."... 

In laboratory tests, we broke up end-of-life tufted carpets using a particular process and cleaned the reclaimed fibres from dust. We used carpets of polypropylene filament yam with uncut loop pile structure so we expected long fibres. Then, we repeated this process on industrial-scale plants. 

Also working on mixtures, Vetrotex CertainTeed has developed Twintex - a commingled reinforcement of unidirectional glass fibre rovings and polypropylene filaments. 

Figure 8.20 Polypropylene filaments extensional (E3), transverse (El) and torsional moduli (C) comparison between experimental results and simple aggregate theory for E3 and El ((a) and (b)) and for C (c).

Figure 5.30 Influence of single fiber fineness and coloration on light resistance (according to VW/Audi specification PV 1303) in textured polypropylene filaments [656]...

Left single fiber fineness of gray-pigmented textured polypropylene filaments Right Pigmentation of filament yarn count 75f31 smooth (single yarn count 2.4 dtex)... 

Sura R K, Desai P aud Abhiraman A S (2001), Oriented crystallization in fiber formation Inferences from the structure and properties of melt spun syndiotactic polypropylene filaments . Journal of Applied Polymer Science, 81,2305-2317. 

FIGURE 9.5 Filament cross-sectional area, A, and temperature, T, at different spinneret temperatures. Data points represent experiments of polypropylene filaments with the following parameters take-up speed, 500 m/min cooling cross air flow, 20 cm/s temperature of cooling air, 20 °C filament denier, 8 and diameter of the spiimeret nozzle, 0.6 mm (No 0), spinneret temperature is 240 °C and (No 1), spinneret temperature is 270 °C. Solid lines represent the theoretical calculations. (Reprinted by permission of the publisher from Kase and Matsuo, 1967.)... 

Uses LubricanL antistat for polypropylene filament Features Heat-stable Properties Liq. 75% act. 

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