Polyoxymethylene fibers

A. Karandikar, Polyoxymethylene fibers in concrete, US Patent 8 785 526, assigned to Ticona LLC (Florence, KY), July 22, 2014. 

BPA/DC was added to polyoxymethylene in order to increase the adhesion to glass fibers [41],... 

Albany International (Needham Heights, MA) hollow fibers, a formulation of 11.5% by weight disparlure in polyoxymethylene copolymer hollow fibers. 

Polyester/glass fibers (70%) 10-13 Polyoxymethylene 0.03 Very small, grayish-white... 

MAC Glass fiber-reinforced polyoxymethylene, POM Modified Plastics... 

Fig. 3. Tensile or fiber modulus (833 ) for polyoxymethylene as determined from X-ray diffraction experiments [13] and compared with simidation [6]. Tte two curves (solid and darted) go through experimental points determined at two draw ratios, X, as a fimction of temporatuieL The value from simulation is appropriate for zero K and is indicated by the < < < line...

Figure 1 Cost-related (specific) flexural strength of major thermoplastics, versus cost-related (specific) thermal tolerance. The unit cost is the market price in US cents (1992) of 1 cm plastics. The thermal tolerance is the temperature difference (AT) over room temperature (AT — T - room T), by which temperature (7 ) the flexural modulus is equal to 1 GPa. Designations, abbreviations WFRP-S, wood fiber reinforced PP (S type) of AECL, Canada (See Table 1) PMMA, polymethylmethacrylate PVC, pol)winyl chloride PS, polystyrene PP, polypropylene UP, unsaturated polyesters PA-GF, glass fiber (35%) reinforced polyamide PHR, phenolic resin EP, epoxy resin ABS, acrylonitrile/butadiene/styrene copolymer UF, urea/formaldehyde LDPE, low density polyethylene PC, polycarbonate POM, polyoxymethylene CAB, cellulose acetate butyrate LCP, liquid crystal polymers PEEK, polyether-etherketone PTFE, polytetrafluorethylene.

Pig. 1. Typical microhardness values of pol3maers compared with data for metals. LDPE, low density polyethylene HDPE, high density polyethylene iPP, isotactic polypropylene CEPE, chain-extended polyethylene POM, polyoxymethylene aPS, atactic polystyrene PET, poly(ethylene terephthalate) PEN, pol3Kethylene naphthalene-2,6-dicarboxylate) CF composite, carbon-fiber composite. Hardness data of metals and alloys markedly depend on composition, degree of work-hardening, processing conditions, etc. For this reason, the values in Figure 1 should be considered as typical values rather than as absolute values. Most of the data for metals are taken from Ref 1. 

Carbon fibers cause a deterioration of volume resistivity, and arc resistance in polyamide 6,6. Mineral fillers also decrease the dielectric constant and surface arc resistance in polyamide 6,6. This is confirmed by a comparison of electrical, mechanical, and thermal properties of polyoxymethylene, where the incorporation of 30% carbon fiber reduces volume resistivity and dielectric strength, in addition to a distinct improvement in tensile strength at heat distortion temperature (Table 5.10). 

Effect of Carbon Fiber Addition on Electrical, Mechanical, and Thermal Properties of Polyoxymethylene... 

Polyoxymethylene Glass fiber 30 Gears, bearings, bushes... 

Typical polymer materials studied in optical thin section include extrudates or molded parts, such as semicrystalline polyoxymethylene multiphase polymers, such as rubber toughened nylon filled polymers, such as carbon black filled nylon fibers, such as polyester and rayon and films which are too thick to transmit light. Two examples are of nylon imaged in polarized... 

High performance PO fibers are produced by including in the dilute solution of an ultrahigh molecular weight PE or PP, some polymeric additives such as lower molecular weight polyolefins, oxidized polyolefins, olefin copolymers, polyolefin graft copolymers, and polyoxymethylenes. The PO fibers so prepared have melting points above 140°C and exhibit improved adherence to matrices and resistance to fibrillation [77, 78]. 

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