FI81843B - FOERFARANDE FOER FOERLAENANDE AV SLITET UTSEENDE AOT TYG ELLER KLAEDESPLAGG OCH PRODUKT SOM AOSTADSKOMS MED FOERFARANDET. - Google Patents

Abstract

of the DISCLOSURE In the method disclosed, cloth to be faded is brought into dry contact with pumice granules that are impregnated with a chemical bleaching agent such as a hypochlorite; the action takes place in a conventional process machine, the drum of which is rotated for a preset duration.

Description

1 81843

METHOD OF GIVING AN EXPOSED IMPRESSION TO A FABRIC OR CLOTHING AND THE PRODUCT OBTAINED BY THE METHOD

The invention relates to a method for applying a worn impression to a fabric or clothing and to a product obtainable by the method.

Today, certain areas of the apparel industry are trying to create a used or faded impression, with this trend being most pronounced in denim garments. This effect is in most cases achieved by the use of salts of alichloric acid, i.e. hypochlorites.

The most commonly used salt is sodium hypochlorite, prepared either by introducing chlorine into sodium hydroxide solution or by electrolysis of sodium chloride.

Hypochlorite solutions (usually between 0.2 and 0.5%) are widely used as bleaching agents, especially in the test industry, because the oxidizing properties of the ClO anion lead to strong bleaching.

Hypochlorite solutions, most often sodium hypochlorite solutions, household bleaches and disinfectants, etc., are similarly widely used at both the commercial and household levels for washing purposes. Such substances allow uniform bleaching of the fabric or garment, the result being more or less visible depending on the duration of the process.

Since then, however, the trend has been towards vague and worn-out effects. One manifestation of such a trend is the use of stonewashing, i.e., immersing the fabric in water free of substances other than pumice. The purpose of this method is to make the denim look naturally faded, used, with light and dark areas; however, in the finished 2 81843 garments, this impression tends to appear only at and near the seams, while the rest of the fabric remains substantially flat.

Attempts to obtain a more authentic appearance 5 have been made using the same stonewashing method and adding sodium hypochlorite. It is true that the use of such a means has made it possible to shorten the processing time, but the result is very much similar to that of the original stone wash with fading applied to the seams of the garment.

Thus, the purpose of the method is to produce an uneven fading effect on fabrics or ready-made garments, the essential characteristic of which is a number of vague patches which vary in color and are vaguely located over the entire area of the fabric or garment. The stated object is achieved by a method characterized by the following steps: impregnating into coarse granules consisting of a material having good absorbency a substance having a strong whitening effect; placing the impregnated granules and fabrics or clothing together in a rotating drum; dry-spinning the fabrics and granules together by rotating the drum for a period of time; removing granules from faded fabrics or clothing; and neutralizing the bleach remaining in the kan-25 gas with a normal wash cycle.

According to the invention, the operation of removing the granules and neutralizing the remaining bleach can be performed either in the order shown or in the reverse order. Using sufficiently coarse pumice grains to allow good absorption of an effective bleaching agent (e.g. hypochlorite), and using the machine dry for a period of time, the desired fabric appearance and strength 35 is achieved by double fading action: mechanically by the action of the bleach absorbed therein.

According to the method, bleaching takes place only in those areas of the fabric which are in contact with the pumice stone grains, and thus an uneven faded result is achieved over the entire extent of the fabric to be treated, either as a fabric or as a finished garment.

The invention will now be described in detail by way of example with reference to the accompanying drawings, in which Figure 1 is a block diagram showing a fading process comprising method steps and steps which may precede method steps, Figure 2 is a side view of an apparatus utilizing the method according to the invention. in a typical operating position, Fig. 3 is a perspective view of the device of Fig. 2 shown in a second typical operating position, Fig. 4 is an additional side view of the device 20 shown in Fig. 2 in a third typical operating position, Fig. 5 shows another embodiment of the device shown in one of three operating positions, Fig. 6 shows Fig. 5 device in a second operating position, and Figures 7 and 8 show the effects of the method on the denim fabric showing the fabric without seams and with seams.

By traditional methods, artificial fading of garments is carried out chemically or, where 30 pumice has been used, mechanically. The chemically produced effects, for example with the help of sodium hypochlorite, have remained within certain limits, because the chemical must necessarily be diluted with the water with which the machine used is filled.

35 On the contrary, the method presented here uses a combination of chemical and mechanical operations, the result of which is very efficient. Before being subjected to the fading process 4 81843, the fabric may undergo conventional treatment cycles, as shown in Figure 1, either as a clean and simple fabric or as ready-made garments. A depicts pressing, B depicts softening by soaking in hot water (50-60 ° C), and C depicts drying; all three operations can be performed using standard equipment. The fourth step D is essentially divided into three steps D1, D2 and D3 and these form the essential content of this description.

The granules 2 of the permeable substance in step D1 are impregnated with an effective bleaching agent; the granules are coarse and ensure a particularly high absorption when the bleach is a liquid. Step D2 describes the placement of the bleach-impregnated granules 2 on the rotating drum 1a of the machine 1, which is used dry for a certain period of time, depending in practice on the mechanical properties of the fabric and the desired degree of fading (about 5 minutes according to the applicant's experience).

20 At the end of step D2, step D3 follows, where. granules 2 are removed. Granules 2 may consist of ordinary pumice and ordinary sodium hypochlorite may '' provide effective bleaching properties, although the possible substances used are not limited to the two mentioned. For example, the granules 2 may consist of a coarse paper-based material and after the mechanical action: the drum of the machine 1 may be filled with water after the fading period has elapsed or the contents of the drum may be transferred to another device arranged next to said machine. With this application, the granules can be removed before being reused, although it is clear that reuse of pumice is recommended because the granules can be re-impregnated with fresh bleach 35 and reused in subsequent processing cycles.

Step E in Figure 1 shows the next step in which the amounts of bleach remaining in the fabric 5 81843 (sodium hypochlorite or whatever is used) are neutralized; this can be done using e.g. hydrogen peroxide in a normal wash-soak-dry cycle.

5 Practical experience has shown that when a suitable amount of coarse, bleach-impregnated granules, such as pumice, are set to rotate in machine D in step D, the combined effect of mechanical and chemical action combined with dry and uneven contact between stones and fabric results in sharp color differences in areas where these contacts occur. . In any case, fading on fabric or clothing appears uneven, vague.

The method shown can be carried out on a machine 1 with a rotating drum 15, which drum can be tilted forward (Fig. 4) to empty fabrics or clothes 3 from the filling hatch 11, and is used in connection with an accessory comprising at least three operating steps: a first step 4. impregnated, a second step 5 in which the impregnated granules 2 are emptied into the drum 1a and a third step 6 in which the granules 2 are removed after each cycle. These three steps typical of operation and device are illustrated in Figures 2, 3 and 4.

The device consists of a simple structure comprising a vessel 7 with an open top 8 and at least one oblique side 9. Preferably, nozzles 10 are arranged in the vessel 7, from which sodium hypochlorite can be sprayed into the granules by means of a tank and pump unit 20 fitted to the vessel. The container 7 can be moved from a first, lower position in which the machine 1 stands vertically (shown in Fig. 2) to a second, raised position (shown in Figs. 3 and 6), the structure rotating so that the inclined side 9 of the container pivots downwards and 35 towards the machine door 11 so that the granules 2 can discharge into the drum 1a where the fabrics or garments 3 to be faded are located.

6 81843

In the second stage, the container 7 is again lowered to the third and last position (Figures 4 and 5), whereby the machine 1 is tilted forward, removing the faded fabric together with the granules 2, and where these 5 are re-used. The rotational movement of the container 7 is provided by a conventional member 13, which in the embodiment shown is a liquid cylinder.

When the granules 2 are re-used and thus separated from the fabric, the device may comprise a screen 10 12, articulated to the body of the machine 1 and operated by means of the member 13. In a preferred embodiment, the screen 12 may be connected both to one side of the container 7 and across its open top 8 (Figures 3 and 4). With the side of the container 7 attached to the screen 12, the screen 15 itself acts as a support for the container 7 when it is filled, impregnated and lifted towards the second or discharge stage (Figure 3), the granules eventually falling from the machine 1 hatch 11 to the rotating drum 1a on top of the open top 8 20 (Fig. 4), the granules separated from the fabric or garment 3 through the grid therein may fall into the container.

· These same granules can then be re-impregnated with sodium hypochlorite and used in the next section. It should be noted that the hatch 11 is provided with a frame 25 for 21 to assist the passage of the granules and the fabric.

Figures 5 and 6 show an alternative structure of the same device designed to reduce the work steps required. In this embodiment, the container 7 remains continuously connected to the power device 13, while the screen 12, instead of being completely separated from the container, simply slides relative to the open top 8 from the first position where the container is uncovered to the second position where the screen completely covers the open top; in the first position the open upper part 35 of the container 7 remains liquid-free and the granules 2 enter the machine 1, while in the second position the purpose of separating the granules 2 is to separate them from the fabric 7 81843 or clothes 3 when emptying the machine after the fading process.

Claims (5)

1. A method for imparting a worn appearance to a fabric or a garment, characterized in that the method comprises the following stages: - grains (2) with good absorbency and the permeability of permeable material are impregnated with a substance having good bleaching properties; the impregnated grains and the fabric or garment (3) are put together in a rotating drum (1a), - the fabric (3) and the grains (2) are dry-treated together as the drum (1a) is rotated for a given time, reuse or remove after being separated from the bleached fabric or garment, and - the bleaching agent remaining in the garment is neutralized by a normal washing cycle. 2. A method according to claim 1, characterized in that the barley (2) consists of pumice stone and the substance with good bleaching properties is hypochlorite solution, advantageously sodium hypochlorite. 3. A method according to claim 1, characterized in that the grain (2) consists of coarse material on a paper base and the substance with good bleaching capacity is ·; hypochlorite solution, advantageous sodium hypochlorite. Method according to claim 1, characterized in that the setting time during which the grains (2) and the fabric (3) are in contact with each other is determined according to the appearance and strength of the faded fabric, and that the grains (2) cause double the bleaching effect, i.e., on the one hand, mechanical random, abrasive or rubbing contact between the coarse surface of the barley and the fiber of the fabric and on the other hand a chemical between the fabric or garment and the bleaching medium obtained from the barley is impregnated, resulting in a visual effect consisting of irregular color stains in uneven distribution over the entire surface of the fabric or garment (3) in the 81843 treatment. 5. A final product supplied by Astadskoms with a method according to claim 1, characterized in that the produced faded appearance is unevenly comprised of varying color flaws compounded by irregular stains as a result of the irregular rubbing and wear. liquid bleach impregnated coarse grains have caused.