Functional Core layer

The process can be used to recover scrap or low quaUty resins by using them as the core layer, and using outer layers of virgin resins designed for the specific functional needs of the product such as sHp or gloss and appearance. The inner core may be a foamed resin with surface layers of supedor finish resins. Coextmded films often eliminate the need for cosdy lamination processes. 

Fig. 8. Temperature increase as a function of pressing time in the core layer of an industrial OSB of 2440 X 1220 x 12 mm dimensions. The highest temperature is reached in the region of the panel comprised between the panel center and 500 mm from the board edge. The fastest initial increase in temperature but lowest max. temperature is for the region nearest to the board edge (100 mm from the board edge).

Fig. 9. Effect of press closing rate variation of counterpressure and temperature increase as a function of pressing time in the core layer of an OSB panel at a press closing lime of 10 s.

This constant value can be taken in turn into the composite functions to calculate the composite properties. A calculation result is illustrated in Fig. 25. For the four sample groups, the calculated layer moduli , are uneven in the cross-section within a composite sample group. The lowest value is still located in the core layer due to the lower deformation and, therefore, the lower... 

Sitarski (1987) computed heat source functions for layered spheres consisting of a core of coal surrounded by a layer of water. One of these source functions is shown in Fig. 24 as a slice through the equatorial plane of the composite sphere. The anisotropy is quite significant with a source spike at the front of the sphere. There is relatively little heat generated in the core, for the electrical field is strongest near the surface. That is quite typical of a strongly absorbing sphere, and Allen and her coworkers showed similar results for a carbonaceous microsphere illuminated by visible and by infrared sources. 

In chapter 7, section 7.2.8 an example of permeation through a functional barrier is described. Three-layered coextruded PET films were produced in which the core layer (P) was contaminated with chlorobenzene and the outer barrier layers (B) were made with virgin material. During the coextrusion process a partial contamination of the virgin layer occurred. The symmetrical structure of this film leads to a simplified treatment of it as a two layer laminate with the thickness d = a + b = 160 + 40 = 200 pm. For the modeling of this problem with numerical mathematics all parameters given in Section 7.2.8 are used. 

At frequencies below 63 Hz, the double-layer capacitance began to dominate the overall impedance of the membrane electrode. The electric potential profile of a bilayer membrane consists of a hydrocarbon core layer and an electrical double layer (49). The dipolar potential, which originates from the lipid bilayer head-group zone and the incorporated protein, partially controls transmembrane ion transport. The model equivalent circuit presented here accounts for the response as a function of frequency of both the hydrocarbon core layer and the double layer at the membrane-water interface. The value of Cdl from the best curve fit for the membrane-coated electrode is lower than that for the bare PtO interface. For the membrane-coated electrode, the model gives a polarization resistance, of 80 kfl compared with 5 kfl for the bare PtO electrode. Formation of the lipid membrane creates a dipolar potential at the interface that results in higher Rdl. The incorporated rhodopsin may also extend the double layer, which makes the layer more diffuse and, therefore, decreases C. ... 

The acid concentration in ice core layers as a function of depth as determined from electrical measurements. The magnitudes of some volcanic eruptions in the Northern Hemisphere have been estimated from the acidity of annual layers in ice cores taken in Greenland. This methodology is sometimes referred to as acidity signal or acidity record. 

Figure 4 Predicted fiber distribution functions in skin and core layers of a square plate (100 X 100 X 3 nun) molded of glass fiber reinforced pol)q>ropylene 15].

A functional layer on the first side of the core layer, wherein the functional layer is a laminating layer, a printable layer, a laminating and a printable layer, or a sealable layer... 

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