Die Verflüssigung des Festen (German Edition)


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  1. Synonyms and antonyms of Liquefaktion in the German dictionary of synonyms;
  2. The Kindly Ones.
  3. English Translation of “Verflüssigung” | Collins German-English Dictionary.

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The Project Gutenberg eBook of German Science Reader, by Charles F. Kroeh, A. M.

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Synonyms and antonyms of Liquefaktion in the German dictionary of synonyms

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Horizontale Scheiben Vorbereitung der Retina

These are simple metal washers and can be bought at any hardware store. They simply add leight weight to the backs of the plugers to ensure even contact between cells and gelatin, while being easy to stock and sterilize.

Approximate mass: 6. A polymer or region of a polymer having an atactic configuration more likely assumes properties of an amorphous structure. And a polymer or region of a polymer having a syndiotactic configuration may take on properties of a crystalline structure but to a degree less than the degree of crystallinity in an isotactic configuration. In this application, "fiber micelle model" means a theoretical construct that characterizes polymer structures that are both crystalline also have amorphous regions a version of a graphical representation of a fiber-micelle structure is shown in FIG 2 specified.

This model can be used to individually characterize the structure of an atactic polymer and an isotactic polymer, that is, each polymer has both crystalline regions and amorphous regions. As explained above, the isotactic polymer is likely to have a greater degree of crystallinity compared to an atactic polymer. In addition, this model can be used to characterize the structure of a mixture of isotactic polymer and atactic polymer.

It should be understood that this model provides a possible consideration of the characteristics of the present invention and in no case limits its scope. An adhesive composition of the invention comprises an APAO containing a butene-1 copolymer, e. A butene-1 copolymer with ethylene or propylene, or a butene-1 terpolymer with ethylene and propylene, having a number average molecular weight of from 5, to 30,, more specifically from 10, to 20,, and a weight average molecular weight between 20, and 60, The crystalline polypropylene may also contain syndiotactic polypropylene or combinations of isotactic and syndiotactic polypropylene.

The adhesive composition is hot melt processable at a temperature of about degrees Fahrenheit or less, more specifically at a temperature of about degrees Fahrenheit or less, more preferably at a temperature of about degrees Fahrenheit or less, and suitably at a temperature of about degrees Fahrenheit or less ,. The melt index is dependent on the crystallinity, molecular weight and molecular weight distribution of the polymer contained in the adhesive composition. The APAO is present in an amount of from 70 to 90 percent by weight and the crystalline polypropylene in an amount of from 10 to 30 percent by weight.

In one embodiment of the invention, the APAO is present in an amount of 73 to 87 weight percent, and the crystalline polypropylene is present in an amount of 13 to 27 weight percent. In another embodiment of the invention, the APAO is present in an amount of 75 to 85 percent by weight and the crystalline polypropylene in an amount of 15 to 25 percent by weight.

For purposes of this invention, weight percent, as the mass of one type of polymer e. So if we z. For example, to form an adhesive composition comprising 80 grams of APAO with 20 grams of crystalline polypropylene, the combination contains 80 weight percent APAO. In another aspect, the invention includes laminated structures that utilize embodiments of the adhesive composition as described above. For example, one version of the laminated structure of the present invention comprises a first layer and a second layer wherein at least a portion of the first layer is attached to at least a portion of the second layer using an adhesive composition that is the same or analogous to one or more of the embodiments described above, and wherein the laminated structure has improved dynamic peel strength, improved dynamic shear strength, and improved static peel time relative to conventional hot melt adhesive compositions.

In each of the laminated structures described above, the first layer and the second layer may be part of the same substrate. That is, the substrate can be folded and joined to itself using an adhesive composition of the present invention. In addition, the first layer, the second layer, or both layers may comprise a variety of materials including, but not limited to, a nonwoven material eg, a necked bonded or a spunbonded material ; a movie; a woven material; and a substrate comprising cellulosic material, thermoplastic material, or both; some combinations of these; or similar.

VIAF ID: 25404110 (Personal)

For example, such absorbent article has a liquid pervious topsheet, a liquid impermeable backsheet; and a laminated structure according to the present invention. Part or all of the backsheet may contain the laminated structure; a part or all of the top layer may contain the laminated structure; the laminated structure may be directly or indirectly attached to the backsheet, topsheet or both; or a laminated structure or laminated structures may be present in some combinations thereof. A method of manufacturing a laminated structure having features of the present invention includes the steps of providing a first substrate; providing a second substrate; providing an APAO as described above; and providing a crystalline polypropylene as described above.

The APAO and the crystalline polypropylene are heated so that they are sufficiently liquified for mixing. The heated APAO and the heated crystalline polypropylene are mixed to form an adhesive composition melt-processible at a temperature of less than about degrees Fahrenheit, more specifically less than about degrees Fahrenheit, and more particularly less than about degrees Fahrenheit and is less than degrees Fahrenheit. The adhesive composition is applied to a first substrate, to a second substrate or to both substrates. At least a portion of the first substrate is combined with at least a portion of the second substrate such that a portion or all of the applied adhesive composition is disposed between the first substrate and the second substrate.

For example, the APAO is present in an amount of 73 to 87 weight percent and the crystalline polypropylene in an amount of 13 to 27 weight percent, such as APAO in an amount of 75 to 85 weight percent and crystalline polypropylene in an amount of 15 to 25 weight percent. It should be understood that the APAO and the crystalline polypropylene can be heated and mixed in a location that does not correspond to the location where the laminate is made.

The mixture may then be cooled and processed to produce a solid form eg, a block or brick. The mixture in solid form would simply be heated to substantially liquefy the adhesive composition prior to its use for the production of a laminate. It should be understood that different sequences of steps are possible by which the adhesive composition can be made.

For example, the APAO may be heated in a first container. The crystalline polypropylene could be heated in a second container before, after or simultaneously with the heating of the APAO. The two substantially liquified polymers could then be mixed in the first container, the second container or a third container. Alternatively, either APAO or the crystalline polypropylene in a container may be heated, and after the selected polymer has been substantially liquefied, the remaining polymer could be added to the same container to be heated and mixed. In another alternative, the APAO and the crystalline polypropylene could be added to the same container to be simultaneously heated and mixed.

In other words, various methods and sequences are possible whereby selected amounts of APAO and crystalline polypropylene plus any other optional additives can be heated and mixed to produce an adhesive composition of the present invention. The preceding discussion assumes that APAO and the crystalline polypropylene have essentially a solid form at room temperature or at temperatures typically present in a human working environment. To the extent that the APAO or crystalline polypropylene is substantially available in liquid form, then these steps, which provide for heating and liquefying the material i.

A method of making the adhesive composition of the present invention comprises the steps of providing an APAO having a number average molecular weight between 5, and 30, and a weight average molecular weight of 20, to 60,, more specifically 25, to 50,, the APAO being a butene The APAO and the crystalline polypropylene are heated so that they can be sufficiently liquified or mixed. The heated APAO and the heated crystalline polypropylene are mixed to produce an adhesive composition melt-processable at a temperature of less than about degrees Fahrenheit, more specifically less than about degrees Fahrenheit, and more preferably less than about degrees Fahrenheit, and suitable less than about degrees Fahrenheit.

A method in which an adhesive composition of the present invention is metered or delivered at a desired rate of a single operation e. The process description that follows describes the preparation, processing and application of the adhesive composition containing APAO and crystalline polypropylene. It should be noted, however, that this description is given as an example. Other processing methods and processing equipment can be used to make and deliver various adhesive compositions of the present invention. The combination of the programmable control system 24 and the flow control system 26 is constructed such that the supply of an adhesive composition in liquid form to the moving web 22 can be controlled.

In general, an adhesive composition is obtained in solid form at a place of manufacture where a device, e. For example, a hot melt adhesive composition may be received as solid tablets, blocks or in any other form. The solid form is then heated so that the hot melt adhesive composition is in a form such that it can be supplied and applied to a substrate or other material.

Usually, this requires that the heated hot melt adhesive be substantially in liquid form. An adhesive composition comprising an APAO and a crystalline polypropylene e. Alternatively, the APAO and the crystalline polypropylene may be received as separate components that are mixed at the point of manufacture.

Die Verflüssigung des Festen (German Edition) Die Verflüssigung des Festen (German Edition)
Die Verflüssigung des Festen (German Edition) Die Verflüssigung des Festen (German Edition)
Die Verflüssigung des Festen (German Edition) Die Verflüssigung des Festen (German Edition)
Die Verflüssigung des Festen (German Edition) Die Verflüssigung des Festen (German Edition)
Die Verflüssigung des Festen (German Edition) Die Verflüssigung des Festen (German Edition)

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