DE2220619A1 - PAPER CONTAINING GRASS SEEDS AND METHOD FOR MANUFACTURING THEREOF - Google Patents

Description

Badische Anilin- & Soda-Fabrik AG 22206 19

Our sign; OZ 29 146 Wd / Un 67OO Ludwigshafen, April 26, 1972

Paper containing grass seeds and processes for their manufacture

When creating lawns, grass seeds are generally used sprinkled on the smoothed ground by machine or by hand and the surfaces are repeatedly irrigated. With this conventional However, the grass seed is often blown away by the wind and it is difficult, especially for laypeople, to distribute the grass seed evenly on the ground in the correct amount.

When laying out lawns, in order to accelerate the process of greening, you have »so-called rolled turf on the Applied to the ground. These are generally about 5 cm thick endless sward, their production and Transport are relatively expensive.

The object of the present invention is to provide a means for the simple greening of previously smoothed ground surfaces, in the case of the grass seed is evenly applied to the ground by laypeople, if necessary, in such a way that it is not applied during sowing and then can easily be blown away by the wind until germination. Another object is a manufacturing method for such a means.

It has now been found that paper containing grass seeds is excellent is suitable for the production of lawns. The paper should generally be 15 to 80, preferably 40 to 60 g

Grass seeds per m contain, generally absorbent and preferably be not or only slightly sized and generally have a weight per unit area of 30 to 250, preferably in the finished state from 50 to 100 g / m. Accordingly, it should Paper generally 15 to 170, preferably 25 to 50 g / m Contain pulp. It can also be in subordinate quantities

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also contain cellulose fibers or other rotting fibers and in particular threads incorporated in the longitudinal direction, in particular Cotton threads.

For the production of the paper containing the grass seeds, any one suitable for the production of paper or wet-laid nonwovens can be used Pulp, e.g. sulphite or sulphate pulp from softwood or hardwood, which can be ground in the usual way, is used will. In terms of costs, the use of waste paper as a source of pulp is of particular interest.

As grass seeds, the usual varieties or mixtures for the creation of Ziep and park lawns come into question, for example one made from 4 % Agrostis penuis, about 27 % Festuca rubra fallox, about 60 % Lolium perenne, 4 % Poa pratennsis and about 5 % Cynosurus cristatus (99/92) existing park lawn mixture. Of particular interest for the production of the paper containing grass seeds are those grass seeds whose germinability is particularly insensitive to brief exposure to heat.

The paper containing the grass seeds can with advantage with conventional Herbicides, e.g. B. ß-indolylacetic acid, or fertilizers, e.g. B. urea and urea derivatives and / or phosphates be impregnated, the for the Weedkill or fertilization usual weight amounts each

m can be used.

The paper containing the grass seeds preferably has recesses in the sheet, the shape of which is not critical and which are usually evenly distributed over the paper. There are, for example, circular, rectangular or square Recesses in question, the distance between the closest edges of adjacent recesses in the is generally between 0.5 and 5, preferably between 1 and 3 cm. The recesses are generally of one size

ρ from 0.5 to 50, preferably from 5 to 15 cm.

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In the production of the paper or cellulose fleece containing the grass seeds, the cellulose is used in the usual way whipped in a dutch, refiner, or pulper and the grass seeds, if necessary after diluting the paper stock, preferably added to the vat with stirring. Can in the vat also in a conventional manner textile fibers and possibly other aids such. B. common substances to increase the wet tensile strength of the paper are added.'The mixture of the whipped cellulose fibers and the grass seeds is then in the usual way on the screen part of a paper machine or wet fleece machine applied. It is preferred that the screen for producing the recesses in the paper sheet covered in places or made impermeable, which z. B. can be achieved by a paint stain application. Here z. B. circular, rectangular or square paint jobs in a row or evenly on the gap Sieve be arranged, these paint stains are those specified above for the recesses of the paper containing the grass seeds Dimensions and distances can be added. The paper webs preferably have continuous edges not interrupted by recesses and the edges closest to the edges of the recesses adjacent to the edges should preferably be 0.5 to 5, in particular 1 to 3 cm, from the edges be.

After sheet formation on the wire of the paper machine or "wet fleece machine", the still moist paper containing the grass seeds can be dried in the apparatus customary for the subsequent drying of paper at which the grass seed loses its ability to germinate. Is z. B. used in the production of a · grass seed park mixture of the above composition and dried the grass seed-containing sheet removed from the sieve in a sieve drum dryer, an air temperature in the sieve drum dryer of 120 to 130 ⁰ C has proven, that is, "h at this temperature

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no significant impairment of the germinability of the grass seeds could be observed. In contrast, the ability to germinate decreased this grass seed with a drying of the paper in the sieve drum dryer to about half, if the air temperature was 140 to 160 ° C. during drying.

So much for the paper containing the grass seeds with herbicides and / or artificial fertilizers are to be impregnated, these substances can, for example, in the vat or be applied with advantage after the first third of the drying section. As far as the paper should contain threads, this can easily be done in the wire section of the paper machine, during sheet formation, in particular in the longitudinal direction of the paper web can be easily introduced. Finally, in the production of the paper containing the grass seeds, it is possible to use conventional, fuhd / or to use synthetic binders for the paper, but these are generally not required, and, if at all, only used in a relatively small amount. As far as these are used, should they are free from seed poisons such as formaldehyde and, if possible, biodegradable, such as starch and / or casein or carboxymethyl cellulose. The paper webs containing the grass seeds, which generally have a width of 50 cm to 2 m, can easily be unrolled on previously smoothed flat floors. Immediate sprinkling afterwards has proven itself, This ensures perfect contact with the ground and thus rapid and even grass growth. Through the recesses in the paper, the germinating grass can grow upwards without lifting the paper off the ground. Miss Such recesses, it can come in unfavorable cases to a lifting of individual points of the paper web, whereby an uneven, spotty lawn can result. The grass seed papers laid lengthways at intervals of about 5 to 10 cm threads, especially cotton or rayon threads are particularly suitable for greening slopes and embankments.

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With paper containing grass seeds, lawns of practically any size can be created quickly and evenly, even by laypeople without the grass seed being able to be blown away, especially since they are thoroughly irrigated after they have been applied to the ground Paper webs generally adhere well to the previously smoothed floor. It is particularly advantageous that the lawns produced in this way have sharply delimited edges.

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Claims (2)

- β - O.Z. 29 146 Claims Paper characterized by a grass seed content. 2. A process for the production of paper which is suitable for creating lawns, characterized in that in the usual production of paper from cellulose in conventional paper machines or wet-laid machines after the pulp has been broken and the fiber has been optionally diluted, grass seeds and optionally cellulose wool adds and from the mixture containing the grass seeds in a conventional manner on the screen part of the paper machine or wet web machine, the screen of which preferably has a pattern of impermeable areas, the sheet forms, which is dried in such a way that temperatures are avoided in the paper lead to a noticeable reduction in the germination capacity of the grass seed. Badische Anilin- «5b Soda-Fabrik AG 309845/0667