Dynamit Nobel Aktiengesellschaft

Huels Troisdorf Ag

Manfred Simon

Richard Weiss

Karl-Heinz Spiess

Alexander Hover

Josef Becker

Herbert Schulte

Erwin Moschter

Jakob Lapp

Hans-Joachim Kaseler

Wilhelm Zundorf

The invention concerns a homogenous, in particular multicolored plastic sheet or panel, based on ethylene vinyl acetate copolymer (EVA) as binder with a filler content of 30 to 80 wt. % and a process for producing it. In other embodiments the binder contains, in addition to the 70 to 85 wt. % of EVA, polypropylenes to improve the processability (tendency to adhere), EPDM to improve the flexibility, and polyethylenes to reduce the tendency to soiling. In the process described, several additives, each consisting of a binder containing at least some ethylene vinyl acetate copolymer, up to 80 wt. % of fillers and up to 5 wt. % of pigments, are mixed, plasticized and granulated or comminuted to form granules or chips of assorted colours which are mixed and, possibly after other processing operations, pressed to form the plastic web or plates.

Homogenous, particularly multicolor-structured synthetic resin sheet or

Process for manufacturing nonwoven materials such as floor or wall

A process for the production of homogeneous flat articles of thermoplastic synthetic resins wherein a starting mixture based on thermoplastic synthetic resins is processed into agglomerate or granulated material by a thermal pretreatment above the softening temperature and subsequently, optionally after additional intermediate steps, is mechanically comminuted to a mixture of particles having a random grain size distribution. The mixture of particles is piled continuously onto a conveyor belt to form a uniform layer and is sintered, under the action of heat up to the plasticization of the thermoplastic synthetic resin, into a coherent flat articles and is then press-molded under the effect of pressure and heat. The pourable powders or particles are formed from a blend of differently colored agglomerates or granules prepared in a predetermined mixing ratio; the blend being obtained from several colored batches of thermoplastic resin, each batch having a different color from the other and each batch being heat treated above the softening point of the thermoplastic resin. In one variation of the process, at least one liquid or pourable, meltable, colored medium is applied in predetermined patterns and penetrates into the sintered layer up to a desired depth, in particular throughout the entire layer thickness; and thereafter the dyed, sintered layer is compressed under the action of pressure and heat into a compact flat article.

Process for the production of dyed, flat articles from thermoplastic

A forgery-proof flat article, for example, for the production of banking cards, credit cards, and the like, is provided with a security feature analogous to a watermark and is made of thermoplastic and elastomeric synthetic resins based on transparent, translucent, or colored sheets made by extrusion, calendering, blow-molding, or spread coating, or composite sheets therefrom, with an application of a colorant, capable of migrating, to the surface in the presence of a crosslinkable component in the flat article and/or in the colorant application. The colorant application, upon reaching the desired migration depth of the applied colorant, is fixed in the flat article by a crosslinking reaction. This flat article, by the use of two differently quickly migrating colorants, has a coloring showing on both sides of the flat article the security feature in congruence, this security feature appearing on the topside in the color of the more rapidly migrating colorant and, when the article is viewed while held up to the light, appearing in the form of the mixed color. Special effects are obtained in one embodiment of a composite flat article wherein one sheet side, treated with two different colorants, is bonded by laminating to a further sheet. After penetration of the colorants and fixation, the security feature is visible on both sides of the sheet and recognizable in the mixed color when the article is held up to the light and viewed in this way.

Forgery-proof flat article of a synthetic resin, and process for the

A process for the production of decorated molded articles wherein a base article is produced by casting and/or compression molding from a hardenable substance containing a minor amount of a thermosetting synthetic resin and a hardener therefor, and a major amount of at least one inert filler, and, optionally, accelerators, colorants and other auxiliary materials and by providing the article with a surface layer of hardenable lacquer resin.

Process for the production of molded decorative articles from a

A process for producing colored synthetic resin sheet material having a unicolored or multicolored dye coating applied to one surface thereof and extending into said surface in a uniform manner involves applying a dye-containing material or composition to at least one selective portion of the surface of a synthetic resin sheet material that contains at least one reactive, crosslinkable component, where the dye-containing material is capable of migrating into a non-porous sheet formed of the synthetic resin; controlling the migration of the dye material into the sheet material to a desired depth; and then initiating crosslinking of the crosslinkable component to stop further migration of the dye-containing material.

Growing community of inventors

Niederkassel, Germany

Manfred Simon