FI68148B - BLOMKRUKA TILLVERKAD AV THERMOPLAST - Google Patents

Description

68148

Flowerpot made of thermoplastic Blomkruka tillverkad av termoplast

The invention relates to a thin-walled flowerpot made of deep-drawn thermoplastic and having a one-piece bottom and peripheral wall with at least two layers, the inner layer of which is dyed black for protection against light.

It is known from DE patent publication 1 729 548 to mold holes in the bottom of the thermoplastic containers, which are first made thin-walled by deep drawing, afterwards with holes in the bottom for dewatering, whereby these cups can be used e.g. flower pots.

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However, it has been shown that such flower pots cannot be used in practice because the wall of such thin-walled plastic containers normally lets light through so much that this is detrimental to the root system of the plant. On the other hand, when preparing thin-walled plastic flower pots, it is desirable for their outer surface to be decorative, in which case this outer surface must be matched in color to the clay flower pots or similar planters.

The technical problem in this case is that the opaque wall 20 must be provided with a decorative surface on the outside.

According to the invention, in order to solve this task, the bottom and peripheral walls of the flowerpot are deeply drawn from an extruded laminate which, due to the strong surface connection of its layers 25, forms essentially a single a thin decorative layer covering the inner layer in color.

30 It has proved particularly expedient to color the opaque layer substantially black and to make it a support layer for the wall of the flowerpot. In this way, it is possible to make this opaque layer from a waste material, for example 2 68148 from waste films obtained in the manufacture of plastic products or also from the material used, and to fill it with corresponding black pigments. This marks a significant drop in the price of the flower pot. This decrease is all the more impressive because this black-stained light-impermeable layer can be used immediately as a support layer for the flowerpot. This means that, on the one hand, the thickness of this layer is sufficient to guarantee light opacity even in a reasonable black dyeing, and on the other hand, the support layer forming an essential part of the wall material is made of inexpensive waste or secondary material.

Other improvements and further developments can be achieved by producing an opaque inner layer as a support layer and coating it with a thin decorative layer. Advantageously, the decorative layer is provided with an opaque pigmentation of the desired color.

In a preferred embodiment, the wall of the flowerpot can be made in three layers, whereby the opaque inner layer can be coated with a pigmented color insulating layer, and a decorative layer can be applied on top of this color insulating layer.

In another preferred embodiment, an additional inner layer of root-friendly material can be provided in the four-layer or three-layer wall structure, starting from the two-layer or three-layer wall structure.

In a very advantageous manner, the walls of the flower pot can be made of PVC, polystyrene or polypropylene.

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Embodiments of the invention will now be described in more detail with reference to the accompanying drawings, in which Figure 1 shows a side view of a flowerpot according to the invention, Figure 2 shows a sectional view of a two-layer wall structure, Figure 3 shows a sectional view of a three-layer wall structure.

Figure 1 shows a flower pot 10, the bottom and outer walls of which are made in one piece. A stacking-10 ring 16 is arranged in the base area, by means of which several nested flower pots are kept together in a form-fitting manner. The bottom openings 15 required for dewatering are provided in the bottom of the flower pot 10 according to a known melting method. To provide reliable stability, legs 17 are formed on the outer perimeter of the flower pot.

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At the upper end of the flower pot 10 there is an expanded circumferential ring 18, which in the area of the opening is bent flangely and at a substantially right angle outwards.

Figures 2-5 show embodiments of the wall structure of a flower pot 10 made of thermoplastic. Figure 2 shows a two-layer structure of a bottom and outer wall made in one piece. The laminate thus shown consists of an opaque inner layer 11, which is at the same time made as a support layer. The opacity of this inner layer 11 to light transmission is achieved by means of color pigments 19 embedded in it. These color pigments 19 are preferably black. Such a black staining of the inner layer 11 prevents the transmission of light harmful to the root system. On top of this opaque inner layer 11, a decorative layer 12 is applied as an outer layer by means of parallel-30 extrusion. This decorative layer 12 is likewise provided with an opaque pigmentation 20, whereby the color of this pigmentation 20 can be kept e.g. clay brown so that the appearance of the flower pot 10 made of thermoplastic resembles a ceramic, especially a clay flower pot. Depending on the intended use, the pigmentation 20 may also have another color.

Figures 3 and 4 show an additional color insulating layer 13 interposed between the opaque inner layer 11 and the floating decorative layer 12. This color insulating layer 14 likewise has a pigmentation 20 of a color similar to the pigmentation 20 of the decorative layer 12. This additional color by means of the insulating layer 13, the black-colored opaque inner layer 11 dyed black is thus avoided through the decorative layer 12. Figures 4 and 5 show the wall structure of the flower pot 10, in which the opaque inner layer 11 is coated with an additional inner layer 14. This additional inner layer 14 is made of root-friendly thermoplastic. The laminate shown in Figures 3-5 is similarly made by parallel mouth extrusion.

Layers 11, 12, 13 and 14 of the laminate may be made of the same material, e.g. PVC, polystyrene or polypropylene. It is also possible to make individual layers of laminate from different thermoplastics. Thus, for example, the opaque inner layer 11, which simultaneously acts as a support layer, can be made of polypropylene having high elasticity. The outer decorative layer 12 can be made of, for example, wear-resistant PVC. The color insulating layer 20 13 and the inner layer 14 can be made of e.g. polystyrene.

In an embodiment not shown, an additional layer of clear transparent Standard polystyrene may be applied over the decorative layer 12. This very thinly applied, through-25 layer of Standart polystyrene is very scratch-resistant and thus further protects the decorative layer 12 of the flowerpot 10 from damage.

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Claims (7)

A thin-walled flowerpot made of deep-drawn thermoplastic and having a one-piece bottom and peripheral wall with at least two layers, the inner layer of which is colored black for protection against light, characterized in that the bottom of the flowerpot (10) - and the circumferential wall is deeply drawn from a co-extruded laminate which, due to the strong surface joint of its layers, forms essentially a single structural unit, the black-painted layer (11) forming the flowerpot wall bearing layer and the outer layer . Flowerpot according to Claim 1, characterized in that the decorative layer (12) is provided in a direct arrangement on top of the load-bearing, black-colored layer (II) with a pigmentation of the desired color. Flowerpot according to Claim 1, characterized in that a pigmented color-insulating layer (13) is arranged between the black-colored, bearing layer (11) and the outer decorative layer (12). Flowerpot according to Claims 1 to 3, characterized in that the black-colored, bearing layer (11) supports the inner surface with an additional inner layer (14) of rootstock-friendly material. Flowerpot according to Claims 1 to 4, characterized in that the wall of the flowerpot (10) is made of polyvinyl chloride. 5 68148 Flowerpot according to one of Claims 1 to 4, characterized in that when the wall of the flowerpot (10) is formed, the black-colored, supportive layer (13) of polystyrene is formed mainly as waste. styrene with a suitable pigment addition. 6 68148 Flowerpot according to one of Claims 1 to 4, characterized in that the wall of the flowerpot is made of polypropylene. 68148