PET/HDPE

In 1994 in the U.S., recycled PET, HDPE, LDPE, and PS had a 16—46% cost advantage (4). This cost advantage largely disappeared by 1996. Bureau of Labor Statistics data indicate U.S. plastics prices in mid-1997 are seven percent below those of mid-1995 after being more than ten percent less in 1996... 

PET/HDPE blends, 21 452. See also High density polyethylene (HDPE) Poly(ethylene terephthalate) (PET) Petite yeasts, 26 451 Petitgrain oils, in perfumes, 18 370 PET molding resins, 20 56-57 current prices for, 20 59t properties of, 20 59t uses for, 20 57 PETN, 10 734-735. See also... 

Paper Removal. PET, HDPE, and aluminum cover a particularly wide distribution of densities. Paper, poly(vinyl acetate), and HDPE have densities which are quite similar, though. However, the paper chips are the lightest of all components, even if they are not the most dense. This is because the paper is the thinnest component present the others are all of rather thick construction. 

Example - 2-liter Bottle Proce s. This concept of integrated technology can be applied to a waste stream of 2-liter bottles composed of PET, HDPE base cup, paper or... 

This chapter covers fundamental and applied research on polyester/clay nanocomposites (Section 31.2), which includes polyethylene terephthalate (PET), blends of PET and poly(ethylene 2,6-naphthalene dicarboxy-late) (PEN), and unsaturated polyester resins. Section 31.3 deals with polyethylene (PE) and polypropylene (PP)-montmorillonite (MMT) nanocomposites, including blends of low density polyethylene (LDPE), linear low density polyethylene (LLDPE), and high density polyethylene (HDPE). Section 31.4 analyzes the fire-retardant properties of nanocomposites made of high impact polystyrene (HIPS), layered clays, and nonhalogenated additives. Section 31.5 discusses the conductive properties of blends of PET/PMMA (poly (methyl methacrylate)) and PET/HDPE combined with several types of carbon... 

Blends of PET/HDPE have been treated previously in the literature [157, 158]. These are immiscible, but the addition of compatibilizers improves the mechanical properties of the blend, such as styrene-ethylene/butylene-styrene (SEBS) and ethylene propylene diene monomer (EPDM) [157], MAH [158], Poly(ethylene-stat-glycidyl metha-crylate)-graft-poly(acrilonitrile-stat-styrene) (EGMA), poly (ethylene acrylic acid), and maleated copolymers of SEBS, HDPE, ethylene-propylene copolymer (EP). The addition of compatibilizers modifies the rheological properties of blends of PET with HDPE, in such a way that increases in viscosity are observed as the component interactions augment. Changes in crystallization of PET were evaluated in blends with Polyphenylene sulfide (PPS), PMMA, HDPE aromatic polyamides, and copolyesters [159]. 

Effect of SEBS level on failure of PET/HDPE 50/50 blends ° ... 

Automated sorting of post-consumer plastic waste was achieved using a combination of fixed-filter NIR and neural network data analysis. Rapid and reliable identification of polymers can be made. The effectiveness of the method was demonstrated for sorting PET, HDPE, and PVC (261). 

Figure 14.8 shows a mixed plastic bottle sotting Une that employs a combination of near-infrared, visible, and X-ray methods to separate PET, HDPE, and PVC bottles. Throughputs above 1500 pounds per hour per line are possible and sorting accuracy and yields are excellent. In bottle sorting, achieving a singulated... 

Mantia et al. [70] used short glass fibers to reinforce a PET/HDPE mixture (Table 16.9), which is one of the typical compositions in packaging waste. The mechanical properties of the blends, except for the elongation at break, are enhanced with the increase of glass fiber content. The addition of 20 wt % glass in PET/HDPE blends increased the tensile modulus by 50%, tensile strength by 110%, and impact strength by 70%. In addition, the heat distortion temperature of the blend was remarkably improved. 

Table 16.9 Mechanical Properties of Glass Fiber (GF) Filled PET/HDPE Blends [70] ...

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