Where results make sense

About us   |   Why use us?   |   Reviews   |   PR   |   Contact us

High Density Polyethylene Low Density polyethylene was being produced at extremely high pressures. The mechanism for the polymerization of low-density polyethylene is free radical polymerization. The difference in high-density polyethylene and low-density polyethylene is the degree of branching. www.eng.buffalo.edu /Courses/ce435/Polyethylene/CE435Kevin.htm   (2108 words)

High and Low Density Polyethylene A sample of high density polyethylene cut in the shape of an "H" and low density polyethylene cut in the shape of an "L" are dropped into a cylinder containing a 1:1 mixture of ethanol and water. High density polyethylene is a linear polymer that has crystalline regions and is used to make rigid containers such as 1 gallon milk bottles. Low density polyethylene is more transparent and waxy than the high density polymer and it is used to make flexible bottles and plastic wrap. jchemed.chem.wisc.edu /JCESoft/CCA/CCA5/MAIN/1ORGANIC/ORG16/TRAM16/C/0561529/MOVIE.HTM   (201 words)

Multi-layer coextruded polyolefin stretch wrap films - Patent 5248547 The intermediate layer is formed from a high pressure low density polyethylene resin and the outer layers are formed from a linear low density polyethylene copolymer such as ethylene copolymerized with a minor amount of at least one C.sub.4 to C.sub.10 alpha-olefin, such as hexene-1, octene-1, decene-1, 4-methyl-pentene-1 and butene-1. In particular, the invention is concerned with a three layer coextruded film having an intermediate layer of high pressure low density polyethylene for strength, the thickness of which can be selected to provide a desired stretch force required to stretch the film during use, and two outer layers of linear low density polyethylene. The intermediate layer is produced from a high pressure low density polyethylene and the two outer layers are produced from a linear low density polyethylene consisting essentially of ethylene copolymerized with a minor amount of at least one alpha olefin having from 4 to 10 carbon atoms. www.freepatentsonline.com /5248547.html   (4785 words)

Chemicals Technology - Odessa Polyethylene Production Facility Though primarily a linear low density facility, the plant is capable of manufacturing a wide range of products, from ultra low to high density polyethylene. Polyethylene is a versatile thermoplastic resin available in a wide range of melt indices, densities and additive formulations. Grades of polyethylene and EVA are available to meet the needs of various fabrication processes such as blown and cast film, blow moulding, injection moulding, extrusion coating, and laminating. www.chemicals-technology.com /projects/odessa   (815 words)

PITT Plastics Inc - Canliners 101   (Site not responding. Last check: 2007-10-14) Low density liners are measured in mils, while High Density liners are generally measured in microns. Compared to traditional low density film, linear low can be run at a lighter gauge with equal strength. Accordingly, they can be made about one-third the thickness of ordinary low density polyethylene liners, so they require only about one-third the ordinary shipping, storage and warehousing cost. www.pittplastics.com /canliners.asp   (748 words)

Help zone :: Bags On The Net | Custom and Stock Plastic, Paper, Vinyl, and Soft Sided Bags. Polyethylene (PE) is the material used in over half of all plastic films today and low density polyethylene (LDPE) is the source of most poly bags. High Density (Hi D) bags are made from a thinner gauge material to lower bag and freight costs and reduce storage requirements. Hi Density (Hi D) bags are made from a thinner gauge material to lower bag and freight costs and reduce storage requirements. www.bagsonthenet.com /store/help.php?section=technical   (779 words)

Polyethylene Polyethylene with molecular weights of three to six million is referred to as ultra-high molecular weight polyethylene, or UHMWPE. Polyethylene is vinyl polymer, made from the monomer ethylene. Branched polyethylene is often made by free radical vinyl polymerization. www.pslc.ws /macrog/pe.htm   (374 words)

Low density polyethylene - Wikipedia, the free encyclopedia Low-density polyethylene (LDPE) is a thermoplastic made from oil. It was the first grade of polyethylene, produced in 1933 by Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerisation [1]. Also, since its molecules are less tightly packed and less crystalline because of the side branches, its density is lower. en.wikipedia.org /wiki/Low_density_polyethylene   (314 words)

Low Density Polyethylene (LDPE) Properties and Technical Information - Dynalab Corp The first of the polyolefins, Low Density Polyethylene (LDPE) was originally prepared some fifty years ago by the high pressure polymerization of ethylene. Its comparatively low density arises from the presence of a small amount of branching in the chain (on about 2% of the carbon atoms). Low Density Polyethylene (LDPE) is a most useful and widely used plastic especially in dispensing bottles or wash bottles. www.dynalabcorp.com /technical_info_ld_polyethylene.asp   (310 words)

Fluorination, Fluorine, High-density polyethylene, UHMW-PE, Low-density polyethylene, polypropylene A form of polyethylene having many side branches off the main carbon backbone and a less closely packed structure than that of high-density polyethylene. Polypropylene is produced by the polymerization of propylene, a relatively inexpensive olefin derived from petroleum. It has a low density, is fairly rigid, has a heat distortion temperature of 150 degrees F to 200 degrees F, and has excellent chemical resistance. www.fluoroseal.com /dictionary.html   (672 words)

UHMW - POLYETHYLENE Polyethylene is used more than any other thermoplastic polymer. It is a corrosion resistant, low density extruded material that provides low moisture permeability. It also has a higher tensile strength, four times that of low density polyethylene, and it is three times better in compressive strength. www.sdplastics.com /polyeth.html   (297 words)

polyethylene compounds, low density polyethylene compounds polyethylene compounds, ldpe low density polyethylene compounds for drip irrigation pipes ldpe polyethylene compounds, low density polyethylene compounds, polyethylene pipes, drip irrigation pipes LDPE 800 IR is a fl compound based on low density and linear low density polyethylene. www.mpb.it /eng/datasheet.asp?P=13   (98 words)

D4635-01 Standard Specification for Polyethylene Films Made from Low-Density Polyethylene for General Use and Packaging ... Note 1-The density of a film will not necessarily be equal to the density of a molded plaque from the same resin. 1.5 This specification allows for the use of recycled polyethylene film or resin as feedstock, in whole or in part, as long as all of the requirements of this specification are met and as long as any specific requirements as governed by the producer and end user are also met. The intrinsic quality requirements include density, workmanship, tensile strength, heat sealability, and odor, as well as the classification properties for impact strength, coefficient of friction, optical properties, and surface treatment. www.astm.org /DATABASE.CART/PAGES/D4635.htm   (621 words)

Goodfellow - Polyethylene - Low Density   (Site not responding. Last check: 2007-10-14) Traditionally differentiated by their density (a good measure of degree of crystallinity), from a scientist's point of view the better distinction is the degree of chain branching. The first polyethylene, later called LDPE, was and is made by a high pressure process using a free radical initiator/catalyst and is a polymer with a high degree of chain branching. These were and are called high density polyethylene (HDPE); this technology is now used to make a family of (chemically) closely related PE's all of which are linear - ULDPE (ultra low density..), LLDPE (linear low...), MDPE (medium...), HMWPE (high molecular weight..) and UHMWPE (ultra high molecular weight..). www.goodfellow.com /csp/active/static/A/ET31.HTML   (312 words)

Polyethylene Polyethylenes are semi-crystalline materials with excellent chemical resistance, good fatigue and wear resistance, and a wide range of properties (due to differences in length of the polymer chain.) Polyethylenes are easy to distinguish from other plastics because they float in water. Polyethylenes provide good resistance to organic solvents, degreasing agents and electrolytic attack. The main difference between low density and high density polyethylene is low density’s flexibility. www.lehighvalleyplastics.com /polyethy.htm   (180 words)

NewAge Industries - Press Release - Low Density Polyethylene Tubing   (Site not responding. Last check: 2007-10-14) It joins the Linear Low Density version of ZELITE, giving customers a broader selection from which to choose. ZELITE Low Density Polyethylene (LDPE) tubing is used for air and pneumatic lines, fluid feeds, chemical transfer, wire jacketing, food and beverage processing, potable water systems, drains, pool and spa supply lines, and more. We previously offered only the low density style of ZELITE, then switched to linear low density a few years ago due to its enhanced resistance to stress cracking. www.newageindustries.com /pr38.asp   (335 words)

Types of Films We Coat with Adhesive - Surface Guard Inc. For example: (a high density film core with two layers of Low Density on the outside give us the stiff film of HDPE with the formability characteristics of the LDPE film). Low Gel Count Films - Gels occur when the raw material polyethylene resin pellets are not fully melted in the extrusion process. Lower gel films can be used for more critical applications that may include high gloss soft surfaces that could potentially be damaged if a gel is pressed into the surface as it is applied, or in a tight wound roll or a heavy pallet of sheeted product. www.surfaceguard.com /film_types.html   (504 words)

Process Economics Report 36: Polyethylene, Low Density Low density polyethylene continues to be the largest volume commodity plastic. In 1977 however, Union Carbide announced a new low pressure route to LDPE having substantially lower investment and energy costs* Since this announcement, a great many companies have been active in developing similar low pressure routes, some with success. The resins produced by these low pressure processes have a linear molecular structure similar to that of HDPE (hence the name linear LDPE) but with some relatively short chain branching. www.sriconsulting.com /PEP/Public/Reports/Phase_78/RP036B   (298 words)

Polyethylene Tubing - Linear Low Density Polyethylene Plastic Tubing - Hudson Extrusions Hudson's Linear Low Density Polyethylene plastic tubing (LLDPE) is far superior to any LDPE, yet just as economical. With its superb stress-crack resistance, Linear Low Density Polyethylene plastic tubing is ideal for applications requiring low-temperature flexibility and durability. Linear Low Density Polyethylene plastic tubing is available in cut Pieces, special lengths and other colors on a custom basis. www.hudsonextrusions.com /lldpe.htm   (166 words)

plastics materials Polyethylene LDPE Semi-rigid, translucent, very tough, weatherproof, good chemical resistance, low water absorption, easily processed by most methods, low cost. Film for packaging is one of the largest markets for low density polyethylene. Low cost, ease of sealing and good product protection have helped to make film the largest polyethylene market. www.bpf.co.uk /bpfindustry/plastics_materials_Polyethylene_LDPE.cfm   (69 words)

Formosa Plastics Corporation, U.S.A. - polyethylene, high density polyethylene, HDPE, linear low density polyethylene, ...   (Site not responding. Last check: 2007-10-14) Formosa offers high density polyethylene (HDPE) and linear low density polyethylene (LLDPE) resins for blow molding, film extrusion, injection molding, profile extrusion, sheet extrusion, and rotational molding applications. We are able to serve a wide range of applications in packaging and industrial markets by licensing a variety of technologies from BP Amoco, Nippon Petrochemical Company, and Chevron Phillips Chemical Company LP (formerly Phillips Petroleum Company). All of Formosa's polyethylene resins are marketed under the tradename Formolene and manufactured in Point Comfort, Texas. www.fpcusa.com /pe/index.html   (208 words)

LDPE, LDPE - low density polyethylene, LDPE Plastic Sheets, Ldpe Specs, Ldpe Sheet Suppliers LDPE (Low Density Polyethylene) has less hardness, stiffness and strength in comparison to HDPE (high Density Polyethylene) but better ductility. It is opaque in appearance, with only thinner LDPE films offering some transparency.LDPE resins (Low Density Polyethylene) are re-emerging as a valuable product family, combining superior clarity with stiffness and density favoured by converters for down-gauging. (L.D.P.E) Low Density Polyethylene is also used to manufacturer washers, grinding wheel blotters and in wire and cable applications. www.plasticshimsandgaskets.co.uk /psg_apps/stage1/ldpe.htm   (231 words)

Voridian Polyethylene E6838-969F - Voridian - Polyethylene, Low Density Plastic Voridian Polyethylene E6838-969F by Voridian Company, a division of Eastman Chemical Company is a LDPE (Polyethylene, Low Density) plastic material. VORIDIAN polyethylene E6838-969F is a fractional-melt low density formulation with no slip and medium antiblock. As supplied by Voridian, VORIDIAN polyethylene E6838-969F may lawfully be used in food-contact applications under the FDA regulations at 21 CFR 177.1520(c)(2.2). www.ides.com /grades/ds/E24068.htm   (502 words)

Polypropylene Supplier - LEB Enterprises Linear low density polyethylene (LLDPE : LUTENE-L) produced under the modern high pressure process has superior mechanical property and facile blending property with low density polyethylene. In addition, injection and roto molding products having distinguished endurance property due to the outstanding environmental stress crack resistance (ESCR) are used for all kinds of household articles, chemical tanks and lid of food containers. For more information on linear low density polyethylene, or LLDPE, or to find out how LEB Enterprises can help you achieve your goals, please contact our offices. www.lebenterprises.com /linear-low-density-polyethylene.html   (118 words)

Voridian Polyethylene D4004-F - Voridian - Polyethylene, Low Density Plastic Voridian Polyethylene D4004-F by Voridian Company, a division of Eastman Chemical Company is a LDPE (Polyethylene, Low Density) plastic material. Voridian polyethylene D4004-F is a fractional melt formulation that contains no slip and high antiblock. It is suggested for low-density polyethylene film applications requiring high strength and for blending with linear low-density polyethylene. www.ides.com /grades/ds/E30191.htm   (400 words)

Polyethylene Huntsman produces Low Density Polyethylene (LDPE), Linear Low Density Polyethylene (LLDPE), High Density Polyethylene (HDPE) and Ethylene-Vinyl Acetate Copolymers (EVA) in multiple plants and technologies. Grades of polyethylene and EVA are available to meet the needs of various fabrication processes such as blown and cast film, blow molding, injection molding, extrusion coating, and laminating. The ease of processing and high purity make polyethylene an extremely attractive material capable of competing in a number of demanding applications. www.huntsman.com /polymers/index.cfm?PageID=989   (181 words)

Linear Low Density Polyethylene (LLDPE) Poly-Flex, Inc. offers Linear Low Density Polyethylene (LLDPE) smooth geomembranes in thicknesses of.5,.75, 1.0, 1.5, 2.0 and 2.5 mm (20, 30, 40, 60, 80 and 100 mils). Rolls are 23 feet wide and vary in length depending on the thickness of the geomembrane. Combined with outstanding resistance to low temperatures and ultraviolet exposure, these liners are ideal for many applications. www.poly-flex.com /lldpeln.html   (250 words)

Try your search on: Qwika (all wikis)

About us   |   Why use us?   |   Reviews   |   Press   |   Contact us   Copyright © 2005-2007 www.factbites.com Usage implies agreement with terms.