Squeeze Bottles

Polyethylene films as packaging ma terial plastic squeeze bottles are molded from high density poly ethylene... 

Low density polyethylene (LDPE). This is one of the most widely used plastics. It is characterised by a density in the range 918-935 kg/m and is very tough and flexible. Its major application is in packaging him although its outstanding dielectric properties means it is also widely used as an electrical insulator. Other applications include domestic ware, tubing, squeeze bottles and cold water tanks. 

A squeeze bottle can be simply made from a 500-ml. narrowmouthed polyethylene bottle and polyethylene tubing. Holes in the bottle cap and shoulder are made with a sharp cork borer of the appropriate size to ensure a tight fit with the inserted tubing. 

A polyethylene or copper foil loop 1 in. wide is placed between the squeeze bottle and the side of the beaker in such a position as to exclude the dry ice from the space and to provide a window to permit one to see that the liquid hydrogen fluoride fills the bottle to a premarked level. The frost on the beaker must be scraped oS to allow inspection through the window. 

When administering oxytocin intranasally to facilitate the letdown of milk, the nurse places the patient in an upright position, and with the squeeze bottle held upright, administers the prescribed number of sprays to one or both nostrils. The patient then waits 2 to 3 minutes before breastfeeding the infant or pumping the breasts. If a breast pump is being used, the nurse records the amount of milk pumped from the breasts. 

The distilled water rinse mentioned in this discussion is necessary to rinse the filtering crucible or filter paper and precipitate free of any other soluble chemicals that might be present. The rinse is accomplished with the use of streams of distilled water from a squeeze bottle directed over the entire crucible or filter paper. The rinsing step is shown in Figure 3.8 for a filter paper and funnel example. 

FIGURE 3.8 Rinsing the precipitate and filter paper with distilled water from a squeeze bottle. 

Obtain the filter to be used, and using forceps, place it on the vacuum filter support. Apply the vacuum and wash the filter liberally with distilled water from a squeeze bottle while drawing the water through it. Place it on a clean watch glass and dry it for 1 h at 103°C. Cool in a desiccator and weigh on an analytical balance. 

Bring the solutions to boiling again (use a hot plate). While waiting for the solutions to boil, fill half of a squeeze bottle with 7 M NH4OH and label this bottle. 

When the solutions begin to boil, remove them from the hot plate and add the NH4OH from the squeeze bottle with continuous stirring until the solutions become quite murky with the Fe(OH)3 precipitate and the precipitate settles readily upon standing. Now test the solution with litmus paper (be sure to rinse the paper back into the beaker). If the paper does not turn a deep blue color, add more NH4OH until it does. Be careful not to add too much. If the solution becomes too basic, other metals will precipitate, causing an error. 

Washing by immersion refers to the wells being filled with a squeeze bottle containing PBS. This allows for quick and thorough washing of each well. 

Low density polythene is chemically inert and tough but flexible and a poor eonductor of electricity. Hence, it Is used in the insulation of eleetriclty canylng wires and manufaeture of squeeze bottles, toys and flexible pipes. 

Film (packaging, trash bags, household wrap, drapes, tablecloths), 59% extrusion coating, 17% injection molding (squeeze bottles, toys, kitchen utilityware), 6% wire and cable, 4% adhesives and sealants, 4% miscellaneous, 10%... 

Extraction. Transfer 5 g sieved ( 2 mm) air-dried soil to a 100-ml glass beaker, add 20 ml M ammonium ethanoate, stir and let stand overnight. Transfer the contents to a filter funnel fitted with a 125 mm Whatman No. 44 filter paper and held in a 250 ml volumetric (graduated) flask. Wash the beaker with ammonium ethanoate reagent from a wash (squeeze) bottle to remove all the sample, then add successive 25 ml volumes of reagent to leach the soil in the funnel, allowing it to drain between additions. With the collected leachate volume approaching 250 ml, remove the funnel to a rack or... 

A low density polyethylene LDPE cellophane, squeeze bottles, trash/grocery bags, diaper lining... 

The product can be sprayed onto surfaces with a mechanical spray applicator device or from a plastic squeeze bottle. It should be wiped off immediately with a dry, lint-free cloth. 

Suggested Packaging Plastic squeeze bottle with precautionary... 

This material may be marketed in an appropriate squeeze bottle to facilitate "under the rim" bowl cleaning by the consumer. 

Place a squeeze bottle half-full of water to 25°C in the constant temperature bath. Vigorously shake the bottle to equilibrate the dissolved 02 at 25°C. 

Polystyrene was the first synthetic polymer used for blow molding during World War II and polyethylene was the first material to be implemented in commercial applications. Until the late 1950s, the main application for blow molding was the manufacture of PE-LD articles such as squeeze bottles. Blow molding produces hollow articles that do not require a homogeneous thickness distribution. Today, PE-HD, PE-LD, PP, PET, and PVC are the most common materials used for blow molding. 

Fill PTFE squeeze bottles with the chemicals and label the bottles with a permanent marker. 

Using a squeeze bottle, rinse the forceps tips with a chemical to be used in sampling over the waste chemicals container. 

Slightly moisten the wipe with the appropriate chemical by spraying it from the squeeze bottle. 

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