Stretched Tapes

Strapping tapes, film tapes, monofilaments, fibres and nonwovens are usually stretched immediately after extrusion to achieve considerable increase in ultimate tensile strength in the stretching direction as a result of molecular orientation. The elongation at break correspondingly decreases. The film for stretched tapes can be produced by a cast film technique using either the water quench or chill roll process. 

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An 80-year-old man developed dermatitis in his leg amputation stump. He had been using stretching tapes containing benzoyl peroxide, and a patch test showed a positive reaction to benzoyl peroxide (1% in petrolatum) on days 2 and 3 (5). 

Mitsubishi Polyethylene. [Mitsubishi Kasei] HOPE, LDPE, LLDPE resins for inj. and blow molding, extrusion, mondfilament stretched tape, pipe, film and oriented film, lamination. 

Uses Nylon for extrusion of monofilaments, bristles, fishing lines, nets, film, stretched tapes and coatings Features Low-vise. 

Stretched tape n. Strong tape made of a crystalline plastic such as polypropylene or nylon, which has been unidirectionally oriented by warm stretching followed by cooling while under tension. Used mainly for strapping. 

New forms of polypropylene (PP) fibrous material have emerged to supplement the established forms of staple fiber and continuous filaments [1]. These are of two distinct types. The first is stretched tape used extensively for woven sack fabrics. The second type relate to spht fiber tape yarns produced by splitting or fibrillation of highly oriented stretched tapes. 

Keywords split fiber, fibrillation, fibrillation tendency, processing, stretching, tape splitting, mesh structure, titre, film profiling, properties. 

The ratio of absorbances at the 1256 and 1220 cm bands is measured when the electric vector of the plane-polarized beam at normal incidence is parallel to and perpendicular to an arbitrary reference direction. The reference direction is usually chosen as the direction of stretch (tape drawing) and, hence, tape longitudinal axis, at which the band intensity is maximum. The dichroic ratio of an absorption band is determined by placing the polarizer at the light source. Orientation function (/<, or/a ) is calculated using the Samuels (6) relationship ... 

Fibres Artificial sport surfaces, monofilaments for rope and cordage, stretched tapes, woven carpet backing, packaging sacks and tarpaulins, staple fibres, coarse fibres, filament yarns, fine fibres... 

Expanded structures can be formed from PTFE by a number of other means.t l For example, preforming and sintering cycles can be controlled to leave voids in the molded part. Another approach is to stretch tapes of PTFE uniaxially or biaxially to create expanded structures that contain pore/voids with controlled size. PTFE compounded with thermally unstable compounds that produce gases such as carbonates can also produce foamed structures. Carbonates decompose and generate carbon dioxide gas when PTFE is heated during the sintering cycle. Carbon dioxide expands in the void space and expands the molten PTFE. 

Polyolefins, PP stretched tape (raffia) in woven packaging... 

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