Solid thermoplastic particles

The iQ automotive battery incorporates a micro-chip which monitors and controls the electrochemical process of the lead-acid battery, as well as its physical environmental and operating conditions. The thermal insulation of the battery also plays an important role. Neopolen P, a thermoplastic particle foam from BASF which can be processed completely without blowing agents, was chosen for this application. The foamed battery container calls for a solid frame that can be mounted onto the car body, and this frame is configured as a solid PP injection-moulded article, and fused to the container. 

In their processible mixture, these one-component products, also belonging to physically setting adhesives, consist of two components PVC (polyvinyl chloride-) particles and plasticizers (Section 9.2.9). The solid PVC particles are disperged in the high-viscosity plasticizer. The adhesive layer formation occurs by heating (120-180 °C), when the thermoplastic PVC swells and is thus able to absorb the plasticizer (no chemical reaction ). This process is called a sol-gel process. The formerly two-phase system (sol) is turned into a single-phase system (gel) by the inclusion of the plasticizer. 

The most commonly used type of inhibited films is produced by joint processing of thermoplastic polymers and highly dispersed Cl powders. When the melting points, as well as the sublimation and thermal destruction temperatures, of the Cl exceed the viscous flow temperature of the thermoplast, the film acquires the structure of a polymer composite filled with solid inhibitor particles [101]. The particles may partially dissolve in the polymer melt and exert a plasticizing effect on the polymer. Introduction of 1-2% of NBA into PE elevates melt flow by 1.5-1.8 times [10]. Aggregation of solid Cl particles may present essential difficulties for their joint processing with polymer melts and result in structural defects or impair the quality of the film as a whole [4]. 

Melt filtration systems can very effectively remove particulate contaminants from polymer melts, for example, continuous systems provided by Process Developments [10] and by Gneuss. Kauferle (Remaker) produced a prototype device capable of causing separation of the melt from high concentrations of aluminium from polystyrene in laminates, or copper from polyethylene in telephone wire, without the need for disposable filter screens. The solid and particle contaminant-free thermoplastic exited from one port on the separation head, while a very high concentration of contaminant embedded in... 

Commercial Plastisols, Accdg to definition given in Ref 2, a plastisol is a liquid dispersion of finely divided resin in a plasticizer. It is usually 100% solid with no volatiles when volatile content exceeds 5% of the total wt it is called organosol. When the plastisol is heated, the plasticizer solvates the resin particles, and the mass gels. With continued application of heat the mass fuses to become a conventional thermoplastic material... 

Since the bonding strength of benzylated wood surfaces was similar to that achieved using commercial hot-melt adhesives, the development of self-bonded wood materials using surface benzylated particles was possible [32]. Suzuki and Iwakiri [33] reported that self-bonded fiberboard produced from benzylated asplund-processed fibers had high thermoplasticity, dimensional stability, and water resistance. Morita and Sakata also produced hot-melt cyanoethylated fiberboards, but they showed poor water resistance [34]. Both benzylated and cyanoethylated fiberboards lacked many of the inherent good properties of solid wood because they did not retain the cellular construction of wood. 

A solid, finely dispersed Cl is rolled on the surface of a heated thermoplastic film [46] and is either embedded, glued or deposited from the gaseous phase or solid aerosol. It is critical for such films to fix reliably Cl on the polymer base surface. A Japanese company, Nitto, manufactures a film with dicyclohexylamine nitrate powder embedded into its surface layer over 1 cm square areas. As a result, the film can be bent and deformed on the areas free from the Cl, and the particles will not crumble away [3]. Cl can be deposited from the vapor phase on definite sites of the film in a given pattern to occupy about 25% of its area [48]. 

A solid structural substance produced by a combination of two or more materials that retain their identities. Typically, one of the materials combined is the strengthening agent, the other being the matrix (a thermoset or a thermoplastic resin). The word composite is also used for systems that are reinforced (reinforced where cumulative properties are superior to the individual components) by addition of certain solid particles (i.e., short fibre composites - long fibre composites - continuous fibre composites). 

A rapid high-temperature solid state pol5mierization of crystalline thermoplastic polymers may be done under conditions of mechanically induced surface stress and friction applied to polymer particles at the incipient melt point temperatures. ... 

Properties Lt. beige powd. 2% max. over 400 pm particle size 0.3-9 pm predominant particle size redisp. readily in water apparent dens. 450 50 g/l Film props. opaque, flexible appearance 99 1% solids Storage 6 mos shelf life from delivery store in cool place protect against humidity since prod, is thermoplastic, should not be subjected to pressure during storage in warm weather (may lead to caking)... 

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