Hose films

The simplest technological process of manufacturing gel-based inhibited films is co-extrusion of a polymer blend (PE) with Cl or its solution in a plasticizer, which was realized in the USSR in the 1980s. This, however, worsened properties of the Cl due to joint processing with PE melt and irrational consumption since Cl isolated from both sides of the film. The latter feature was partially eliminated by application of a lacquer or enamel layer on the hose film surface [50]. 

Fig. 2.8. A device for feeding a modifier to the extrusion head mandrel of the hose-film aggregate (1) extrusion head (2) mandrel (3) polymer hose (4, 5) and (24) tube and channels for compressed air (6) channel for inhibitor liquid (7) and (8) liquid levels over extrusion head mandrel and in the feeding chamber, respectively (9) Cl feeding chamber (10) and (12) valves (11) float (13) and (14) mains (15) and (16) magnetic distributors (17) pump (18), (19) and (22) taps (20) and (23) accumulator tanks (21) pressure valve...

Solid particles of Cl can he bonded to the inner surface of the hose film during forcing of air with a fine-dispersed inhibitor powder into the hose cavity. Cl particles adhere to the hose surface in the viscous-flow state and fix on solidification [47]. 

Multilayered and combined inhibited hose films are mainly produced by co-extrusion methods. Apart from these, original procedures for obtaining adherence to the hose base functional layers (coats) are employed. In one of these [50] a barrier coating is formed on the outer surface of the hose film filled by Cl using one of aforementioned methods. 

Fig. 2.10. Process layout of hose films with inhibiting varnish layer and their structure (a) polymer base, (b) jelly-like layer, (c) varnish layer. (1) extruder, (2) head, (3) annular slot, (4) and (5) compressed air main and channel, (6) heat-insulating pad, (7) and (8) pipeline and duct for inhibiting liquid, (9) and (10) pipeline and duct for inhibited varnish, (11) adjustable diaphragm table, (12) hose, (13) inhibiting liquid layer, (14) annular flow of varnish. (A—A) solidification hne of polymer melt...

Fig. 2.11. Process schemes for inhibited laminated hose films (a) two-layered and (b) three-layered films of two polymer materials A and B, (c) three-ply film of three materials A, B and C. (1) extruder, (2) extrusion head, (3) hose, (4) pumping unit...

Fig. 2.26. Electron microphotographs of the surface of inhibited PE-based hose film (a) outer surface of the hose (b) iimer surface from the treated by Cl (PhTet) in PI (dioctyl phthalate) suspension...

Uses Plasticizer for PVC for hoses, films, oil-resist, cables, migration-proof dashboard coatings, electro-insulating films Features Good thermostability, very low migration tendency, resist, to aq. media... 

Flexible PVC compounds incorporating the phthalate plasticizers have been used for a long time now in a wide range of tubing, hoses, films, wire, and cable jacketing applications in automotive, building, consumer, and health-care markets. However, the recent controversy over the migratability of phthalate ester... 

Octyl epoxy tallate n. A monomeric plasticizer and heat and light stabilizer for vinyls and cellulosics. It imparts good low-temperature flexibility, has low volatility, and is used primarily in coated fabrics, garden hose, film and sheeting, and slush-molded parts. 

SES Cable jacketing, Tubing, sheeting. Electrical, Tubing, film, seals. Tubing, film, cable Tubing, hose film. Gaskets, seals. 

Polyester elastomers have good processability by extrusion, injection molding, blow molding, and casting molding (hoses, pipes, technical goods, fire hose films, see also Chapter 17). Poly(ether-ester) elastomers containing predominantly... 

KP3363 Mechanical strength, resilience (D63) Tubing, hose, film, insulation coatings, fuel tanks, gears... 

Flexible poly(vinyl chloride) This type typically contains 30-40 wt.% additives, especially plasticizers, to lower the glass-transition temperature. Applications include hoses, films, flooring, and automotive interiors. 

Polyvinyl chloride (PVC) is one of the most widely used thermoplastics. It can be extruded into sheets and film and blow molded into bottles. It is used in many common items such as garden hoses, shower curtains, irrigation pipes, and paint formulations. 

TPEs find use in automotive, wire and cable, footwear, polymer modification, hose and tube, mechanical, bitumen modification, construction, adhesives and coatings, and film/sheet applications. 

Flexible PVC resins and other dioctylphthalate-containing plastics and resins are used in a variety of industrial and domestic products plastisols for carpetback coating (EPA 1987b), film, wire, cables, and adhesives (HSDB 1995). Additional end-use products are automobile and furniture upholstery, wall coverings, window shades, garden hoses, shower curtains, tablecloths, rainwear, shoes, dolls, and toys (Mannsville Chemical Products Corporation 1989). 

Hoses and tubing, hydraulic hoses, fire hose liners, flexible tubing... Films and sheets. .. 

Uses Plasticizer in PVC flooring and other flexible PVC products (e.g., bottles, garden hoses, fishing lures, fabric coatings, flexible medical plastics, tarps, and awnings), films, and sheets in vacuum pumps. Also used in fluorescent lighting ballasts manufactured after 1979 as a replacement for PCBs (U.S. EPA, 1998). 

U.S. market is about 20 million pounds per year. The applications are those where one needs very high flame resistance (clothing for firefighters and welders, welder s protective shield, upholstery and drapes), heat resistance (ironing board covers, insulation film for electrical motors and transformers, aerospace and military), dimensional stability (fire hose, V- and conveyor belts), or strength and modulus (circuit boards, bulletproof vests, fiber optic and power lines, ship mooring ropes, automobile tire cord, puncture-resistant bicycle tires). 

The viscosity of the reaction mixture is now too high for the final polymerization to be carried out in the same apparatus . For laboratory purposes simple metal forms are sufficient.They consist of two metal plates covered with a Teflon film. A temperature-and chemicals-resistant hose (e.g., VITON A) serves as sealing and distance control.The whole set-up is pressed together with clamps until a distance of about 5 mm is reached. When filled with the hot prepolymerization mixture they are heated in a vacuum oven under nitrogen ( ) according to the following program ... 

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