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Coextrusion automates bag-in-bottle production.


Innovative bag-in-the-bottle technology from Gaplast GmbH of Saulgrub-Altenau, Germany, uses coextrusion blow molding to produce a thin bag made of ionomer ionomer (īon´mr),
n a polymer containing ion.
 inside a PP bottle. The two incompatible incompatible adj. 1) inconsistent. 2) unmatching. 3) unable to live together as husband and wife due to irreconcilable differences. In no-fault divorce states, if one of the spouses desires to end the marriage, that fact proves incompatibility, and a divorce  materials separate easily after molding, leaving a flexible bag joined at the neck with a stiffer bottle. This concept eliminates labor-intensive assembly of four separately produced components. The 1-liter disinfectant disinfectant, agent that destroys disease-causing microorganisms and their spores. Disinfectants, or germicides, are sometimes considered to be substances applied to inanimate bodies, whereas antiseptics, not so potent, are agents that kill microbes on living things.  spray bottle--winner of a recent 2008 DuPont Packaging Award--is the largest size bottle using this approach. It was made on a BM 206 DL dual-station coex tandem shuttle machine from Bekum (U.S. office in Williamston, Mich).

[ILLUSTRATION OMITTED]

The Bekum unit has four extrusion heads and six extruders running twin four-cavity molds The extrusion head has a spiral distributor for the PP bottle resin resin, any of a class of amorphous solids or semisolids. Resins are found in nature and are chiefly of vegetable origin. They are typically light yellow to dark brown in color; tasteless; odorless or faintly aromatic; translucent or transparent; brittle, fracturing , while a side-fed die head with a heart-shaped curved tube introduces the inside bag layer (0.1 to 0.2 mm of Surlyn ionomer from DuPont Packaging & Industrial Polymers, Wilmington, Del.). The machine has bobbing extruders to optimize optimize - optimisation  control of the tubing, and a quick-change feature for the extrusion head. The machine can run up to six layers; three for the outer bottle and three for the inner bag.

A post-molding operation in a separate machine partially delaminates the bag from the PP, and vent holes are incorporated without piercing pierce  
v. pierced, pierc·ing, pierc·es

v.tr.
1. To cut or pass through with or as if with a sharp instrument; stab or penetrate.

2. To make a hole or opening in; perforate.

3.
 the bag. A co-molded seal connects the bag and 1-mm-thick bottle at the bottom. Gaplast is targeting other cosmetics and pharmaceutical applications in Europe.

+49-8845-741326 * www.gaplast.de

(517) 655-4331 *

www.bekumamerica.com

(800) 438-7225 * www.dupont.com
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Copyright 2008 Gale, Cengage Learning. All rights reserved.

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Title Annotation:READERS' SOLUTIONS
Publication:Plastics Technology
Date:Jun 1, 2008
Words:251
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