ASTM D5630 EBOOK DOWNLOAD

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Standard Test Method for. Ash Content in Plastics1. This standard is issued under the fixed designation D ; the number immediately. ASTM D , Standard Test Method for Ash Content in raudone.info - Download as PDF File .pdf), Text File .txt) or read online. D Standard Test Method for Ash Content in Plastics muffle furnaces~ mineral fillers~ Standard + Redline PDF Bundle ASTM License Agreement.


Astm D5630 Ebook Download

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Reprinted from the Annual Book of ASTM Standards. This standard is issued under the fixed designation D ; the number immediately following the. ASTM TOC Section 00 - Index Section 01 - Iron and Steel Products Volume Steel--Piping, Tubing, Fittings Volume Home; ASTM D standard by ASTM International, 04/01/ . View all Printed Edition + PDF;; Immediate download; $; Add to Cart.

ASTM Standards on Rubber Products

The problem is exacerbated if the can is not stored upright, so that the contents of the can surround the valve member. The migration path is shorter, and when the foam cures around the valve member it interferes with the operation of the valve, sealing it closed. In the preferred embodiment the polyolefin is a high density polyethylene. The valve member of the preferred embodiment is more resistant to failure from moisture infiltration than the polypropylene valve members of the prior art.

The valve member of the preferred embodiment is less adhesive than the propylene valve members of the prior art, so that to the extent that the contents of the container does inadvertently cure inside the container, it is less likely to adhere to the valve member and interfere with the operation of the valve.

Thus embodiments of valves in accordance with the principles of this invention can extend the shelf life of urethane foams and other moisture curable or moisture affected products dispensed from aerosol cans.

The dispenser valve 20 comprises a valve member 22 in a seal The valve member 22 has first and second ends 26 and 28, and a central passage 30 extending partially therethrough. A plurality of openings 32 extend through the valve member 22 and communicate with the central passage The openings are covered by the seal 24, but when the valve member 22 is deflected, it opens a space between the valve member 22 and the seal 24, so that the pressurized contents can exit the container between the valve member 22 and the seal, through the openings 32, and out the passage In accordance with the principles of this invention, the valve member 22 is made from a glass-filled polyolefin.

The inventors believe that glass-filled polyethylene is more resistant to adhesion than the polypropylene valve members of the prior art, or other suitable polymer materials. The inventors have also discovered that chemically coupled glass-filled polyolefin, and specific glass-filled polyethylene is less adhesive than the valve members of the prior art, to the extent that the foam does inadvertently cure inside the container, it is less likely to adhere to the valve member and interfere with the operation of the valve.

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The polyethylene is preferably a high density polyethylene. Thus the valve member of the preferred embodiment are more resistant to moisture infiltration, and less adhesive to moisture curing foams, such as polyurethanes. Thus the valves constructed in accordance with the valve members of this invention are less likely fail, even when the cans on which they are used are not properly stored, and provide a greater product shelf life.

Example 1 Cans of moisture curable polyurethane foam components were prepared with valve parts made of different plastics. Each week three cans of each type were examined and rated on whether the can was fully functional, stuck but functional, or stuck.

Failure was determined when all three cans of the sample failed. The results of the test are given in Table 1.

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Sixteen cans of each type were stored upside down at Cans were inspected at the end of 11 weeks to determine whether the valves were stuck or were functional. The results are given were given in Table 2. Example 3 Cans of moisture curable polyurethane foam components were prepared with large valve parts made from different plastics. Twenty-two cans of each type were stored upside down at ambient with caps filled with water. Two cans of each type were tested periodically, and it was noted whether the valve worked, whether the valve was stuck but broke free, or whether the valve failed.

The results are given in Table 3. Two cans of each type were tested periodically, to determine whether the valve worked, whether the valve was stuck but broke free, or whether the valve failed.

Ash Content

The results are given in Table 4. Example 5 Cans of moisture curable polyurethane foam components were prepared with valve parts made from different plastics.

Cans of each type were stored upside down with caps filled with water at Two cans of each type were periodically tested to determine whether the valve worked, whether the valve was stuck but broke free, or whether the valve failed. The results are given were given in Table 5. Example 6 Cans of moisture curable polyurethane foam components were prepared with valve parts made from different plastics.

Failure was determined when both valves tested stuck or failed. Test Method D is recommended for unknown samples, and in instances where 3.

There are no terms in this test 1. Summary of Test Method 1.

The category - similar standards:

Samples are flamed over a burner prior to being 5. Significance and Use ashed in a muffle furnace. Samples are ignited and ashed in a block, fillers, reinforcements, catalyst residues, colorants, etc. The quantitative amounts of each are important variables of the manufacturing process.

NOTE 1—For more efficient ashing, the plastic sample should be in the form of powder or pellet. It is the 6.

Electrical Insulating Materials: International Issues

See Section 9 for 6. Referenced Documents 7. Apparatus 2.

The balance should be checked D Terminology for Abbreviated Terms Relating to periodically to ensure accuracy. Plastics2 7.

Published November Last previous edition D — Floor, New York, NY Use insulated gloves microwave-heated furnace, capable of maintaining a tempera- and long crucible tongs when transferring crucibles. Irritant fumes are NOTE 4—If an electric muffle furnace is used, it should be positioned in given off by the polymer during ashing.

If a microwave furnace is used, it should be positioned within or adjacent to the hood and the exhaust tube vented into the hood to prevent breathing of the byproducts of the combustion. Sampling, Test Specimens, and Test Units microwave furnace should be capable of providing an air flow of 2. Preparation and Apparatus source, or equivalent. See Fig. Calibrate the air Quartz-fiber crucibles are disposable items and do not require 7.

Reagents and Materials at the set operating temperature for 5 min to burn off any 8. Handle the crucibles with tongs 9.A Sr is the within-laboratory repeatability and SR is the between-laboratory Powdered materials may study of eight materials. If a microwave furnace is used, the ceramic door of the for that material. Summary of Test Method 1.

Use insulated gloves microwave-heated furnace, capable of maintaining a tempera- and long crucible tongs when transferring crucibles. This testing indicates that glass-filled polyethylene provides improved performance with different seal materials. If a microwave furnace is used, it should be positioned within or adjacent to the hood and the exhaust tube vented into the hood to prevent breathing of the byproducts of the combustion. The results are given in Table 3.

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