Needled polypropylene

Polypropylene fibers are used for face pile of needle felt, tufted carpets, upholstery fabrics, etc. 

Administration sets Nylon (spike) Polyvinyl chloride (tubing) Polymethylmethacrylate (needle adapter) Polypropylene (clamp)... 

Many industrial semi-crystalline polymer materials like polypropylene, polyamides, or polyesters contain nucleating agents or clarifiers which form needle-shaped aggregates already in the polymer melt. "For this purpose the pattern is desmeared using the measured primary beam. For a less involved treatment it may be sufficient to know the integral width of the primary beam profile in fiber direction. 

Polypropylene hub stainless steel needles 27 G (Becton Dickinson). 

Lubricant for fiberglass prevents needle cutting polypropylene emulsion stable in resin baths,... 

The skin is cleaned and anesthetized as for other similar procedures, and lOmL of fluid is aspirated into a syringe connected to the spinal needle that is typically used. Sterile containers such as polypropylene test tubes or urine cups are used to transport the fluid to the laboratory. If a specimen is for the determination of the lecithin-sphingomyelin (L/S) ratio, the container is immediately placed in ice if it is for spectrophotometric analysis, the specimen should be transferred to a brown tube or bottle to prevent photodegradation of bilirubin. Alternatively the specimen container may be wrapped in aluminum foil. 

Prefdled syringes can also be made from tubular glass or by moulding in plastic (e.g. polypropylene). These units may consist of either a single or double (bi) compartmental type. The latter then involve three seals, as a seal must be achieved between the two compartments. Syringes are further complicated at the end seal by the presence of a fitment for a needle (e.g. Luer) or by having a needle already moulded or fitted. These protrusions may then demand a further cover or seal, e.g. to protect the needle and prevent microbial contamination. 

Reactor operation. The polypropylene hollow fibers in the reactor were prewetted prior to inoculation with recirculation of 50% ethanol and sterilized chemically with 5% formalin solution. Then the reactor was washed by ultrafiltration of one liter of autoclaved distilled water. The reactor was placed in a water bath maintained at a desired temperature. Cells were inoculated through the inoculation port using a syringe needle. The detailed experimental setup is shown in Figure 3. 

The consumption of polypropylene carpet in West Europe is about 0.5 MT, which is about 50% of all flooring materials for 2.6 billion sq.m. It is second to 3.6 billion sq.m, for nylon, whereas polyester is only used for bathroom rugs. Among the flooring materials used in West Europe, tufted carpet accounts for 60%. Among 500,000 tons of polypropylene carpet, tufted carpet accounts for 150 KT, machine woven, 130 KT, needle-punched, 100 KT, and carpet backing, 100 KT. 

Polypropylene fabric for furnishing has been produced primarily by machine weaving. The current trend is to produce furniture upholstery with polypropylene tufted fabric of medium-denier BCF, air-textured yarn, and draw-textured yarn. More than one fourth of polypropylene upholstery is produced by needle punch. Polypropylene upholstery is widely used for sofa covering. Although the air-textured yarn is most economical, it is also used in combination with the BCF yarn. About 40% of polypropylene fabric is used in furnishing, of which 14% is used in cars. Among the automotive fabrics consumed in West Europe in 2000, 41.7%) was polyester, 26.1% nylon, 13.9%i polypropylene, and 11.8% viscose. It is estimated that the consumption will increase from 259 KT in 2002 to 302.9 KT in 2006. 

High-retraction polypropylene fiber has low thermal conductivity for thermal insulation. It also provides fluffiness with high retraction. This fiber is widely used in blanket, cotton products, synthetic leather, nonwoven fabrics, weaving, and needle knitting. 

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