Translation of "Dense skin" in German

Molded parts having a lightfast dense skin are preferably produced according to the process of this invention.

This resulted in the formation of a foam having a dense, closed outer skin.

Edges can be strengthened other dense fabric or skin.

This fruit resembles large purple balls with a tight, dense skin.

In each case, a foam formed having a dense, closed outer skin (structural foam).

On mixing these materials together there is known to arise a so-called semi-hard foam structure with a relatively dense outer skin.

For this reason, the pigment particles are customarily treated with aluminium oxide following application of the dense SiO 2 skin.

But with the more dense skin of cats or dogs, the bug cannot cope.

Bed bugs do not parasitize on cats and dogs due to the thick coat of the latter and dense skin.

For tits should hang a few piecesunsalted bacon connected together by a dense skin.

Factors of growth are responsible for restoration of skin fabrics, doing skin dense and elastic.

Only waterfowl (ducks, geese) are well protected from them by sufficiently dense skin.

A further improvement in the properties of the molded articles produced according to the invention is obtained by providing them on the surface with a continuous, dense, nonporous skin of polyurethane or polyurethane urea having a thickness of from 0.05 to 1 mm, preferably from 0.1 to 0.5 mm, most preferably from 0.2 to 0.3 mm, as a sealing layer.

In the processes referred to, the blowing agent is in every case an inert, low-boiling, organic solvent, since only in this way can a dense outer skin be achieved.

The formation of foam using a mould can be carried out in such a manner that the moulding has a cellular surface structure, or alternatively, it can be carried out in such a manner that the moulding has a dense skin and a cellular core.

It is particularly advantageous to use the PU powders according to the invention for producing foam moldings having a dense outer skin by first producing the outer skin from the PU powders according to the invention by the slush molding process and then back foaming this skin with the same powder containing blowing agent.

A dense skin is formed on the surface(s) of the membrane in a corresponding manner on one or on both sides.

However, there is an upper limit for the swelling agent content, above which a dense skin 1 will no longer be formed.

Mold foaming can be carried out in such a way that the molding has a cellular structure on its surface or it can be carried out in such a way that the molding has a dense skin and a cellular core.

However, since the dense skin is disposed at the surface, scratches can easily occur there, thus significantly reducing the reliability and the retention rates (DE-OS) 37 40 871).

In the latter case, the molding composition is heated to give a foam having a dense, closed outer skin (structural foam), from which a molding is then produced by mechanical treatment (cutting, sawing or the like).

Electron micrographs of the cross-section of these polymer membranes show that they are structures with a felt-like texture, while the asymmetric structure texture with the dense polymer skin on the membrane surface is almost completely suppressed.

It is therefore an object of the present invention to improve, for example, the method in such a way that it can be used to manufacture membranes having any desired geometrical shape, an adjustable morphologic structure, a dense or microporous skin that is formed on the outside and/or on the inside, high permeability, and, for hollow filaments, a good mechanical strength.

The mold expansion can be carried out in such a manner that the product has a cellular structure at its surface or a dense skin and a cellular core.

The internal mold release agents are used for the preparation of noncellular or cellular molded articles or molded articles having a cellular core and a dense skin, so called integral skin foams, using the polyisocyanate addition polymerization process.