JP2002516383A - Laundry detergent and detergent tablet with cavity - Google Patents

Abstract

  (57) [Summary] The present invention relates to a laundry detergent / detergent molding having a cavity. The moldings exhibit mechanical stability and can be produced by modern tablet presses with high operating performance. The cleaning agent molded article of the present invention, when the ratio between the width of the gap from the edge of the cavity to the edge of the molded article (ridge line width) and the width of the molded article (relative edge line width) ≤ 0.4, can get. In particular, the ridges surrounding the compact and the cavity exhibit this advantage. Moldings with cavities usually show accuracy with respect to volume.

Description

DETAILED DESCRIPTION OF THE INVENTION

FIELD OF THE INVENTION The present invention relates to a laundry detergent / detergent tablet with a cavity designed to have a particular geometry. In particular, the present invention relates to tablets containing laundry detergents or detergents and tablets containing auxiliary components of detergents or detergents, such as dishwashing detergent tablets, laundry detergent tablets, detergent tablets, bleach tablets, scoring salt tablets, Examples include water softener tablets, toilet detergent tablets, and the like.

BACKGROUND OF THE INVENTION Laundry detergent and detergent tablets are widely disclosed in the prior art literature, and are easy to measure and package, and aesthetically pleasing to consumers. Is growing in popularity. With respect to conventional and currently used products, tablets are known in a number of possible designs, and such designs are available in a variety of forms, such as angular tablets and round tablets, and in a variety of multilayer tablet structures. It covers colors. In particular, in the prior art, multi-layer tablets (such as bi-layer tablets), ring-core tablets, core-inlay tablets, etc., in order to release different active substances at different rates or to separate mutually immiscible components. Established

For example, according to the disclosure of European Patent Application 055 100 (Jeyes Group), toilet detergent tablets are designed in the form of tablets with cavities, core-inlay tablets, ring-core tablets and the like. This patent document only very generally discloses a number of possible configurations, and does not disclose any specific geometric configuration for cavity tablets.

European Patent Application 481 547 (Unilever) discloses a multilayer laundry detergent tablet,
This tablet form is a ring-core tablet having at least three layers, including an inner layer, a barrier layer, and an outer layer. This patent document, as well as said document, does not address the development of tablets with cavities, and thus does not mention any parameters of its geometry.

[0005] Multi-phase or multi-layer laundry detergent / detergent tablets are also disclosed in European Patent Application EP 481 7
92 (Unilever), EP 481 793 (Unilever) and International Patent Application WO 97 03177 (Ben
ckiser).

[0006] Cavity tablets have not been extensively disclosed in the prior art due to special problems associated with their manufacture. When forming tablets with cavities by compression of the granular premix, cavities are formed during the compression process by protrusions provided on either the lower die or the upper die.
The lower die is adapted for compressing the mixture and the upper die exerts a compressing action.
A problem that often occurs, especially with cavity tablets, is that the mechanical strength of the tablet is too low. For example, pulling out the upper die often breaks the ridges around the cavity, some of the premix continuously adheres to the molding surface of the die, the tablet itself breaks down, and the volume of the cavity is constant. And the reproducibility is lost.

On the other hand, cavity tablets have particularly attractive advantages for laundry detergent / detergent tablets. For example, certain laundry detergent / detergent components can be compressed or cast into preformed cavities. Also, certain substances can be removed from the cavities, so that mutually insoluble components can be separated. Furthermore, the aesthetic appearance of a tablet with cavities cannot be neglected because its "fried egg structure" is highly accepted by consumers.

[0008] The problem to be solved by the present invention is to provide a laundry detergent / cleaning agent tablet which does not have the above-mentioned disadvantages despite having a cavity. That is. In particular, the tablets themselves and the ridges surrounding the cavities should both exhibit mechanical stability and must be manufactured in high yields by modern tableting methods. Furthermore, the cavities should exhibit a high degree of accuracy with regard to their capacity values, even in high volume production.

According to the present invention, the ratio between the width of the interval from the edge of the cavity to the edge of the tablet (hereinafter, referred to as “ridge width”) and the width of the tablet is as described above. It was found to have a decisive effect on solving the problem. This ratio is referred to herein as
It is called "relative ridge width".

[0010] Accordingly, the present invention provides a laundry detergent or detergent tablet having a cavity with a relative ridge width ≤ 0.4 and comprising a compressed particulate material.

“Relative Ridge Width” and “Ridge Width” The relative ridge width can vary independently of the tablet geometry as well as the cavity geometry. A quadrilateral whose four angles are almost right angles (rec
hteckige Form (hereinafter referred to as "rectangular") tablets with symmetrically disposed rectangular cavities, where the ridge width is constant over the entire ridge while circular or oval cavities , The ridge width changes.
This is because the curvature of the cavity increases the distance from the edge of the tablet. In this case, the absolute ridge width is the shortest distance from the edge of the tablet to the edge of the cavity. Regarding a tablet in which the form of the cavity is different from the form of the tablet itself, the width of the ridge is,
The value is different in the case of the cross section. This aspect is also possible in the present invention without any problem. However, the condition is that each of the determined relative edge line widths satisfies the criterion of ≦ 0.4. For technical reasons, preferably the ridge width is always a limited value. This is because symmetrically arranged cavities have better aesthetic appearance than asymmetrically arranged cavities. A technically advantageous design is for example a circular tablet with a circular cavity arranged on concentric circles (single ridge width), a square tablet with a circular cavity, such that the center of the circular cavity is the center of the square Placed tablets (single ridge width), symmetrically placed quadrilateral tablets with circular or oval cavities (one or two ridge widths depending on design), symmetrically placed right angles Examples include a quadrilateral tablet (one or two ridge widths depending on the design).

The term “relative ridge width” as used herein is illustrated by FIG. 1, which shows a longitudinal section of a tablet. In FIG. 1, L is the length of the right-angled quadrilateral tablet, L2 is the length of the cavity, and L1 and L3 mean the ridge width. For symmetrically arranged cavities, L1 and L3 are the same, regardless of whether the cavities are circular, oval or angular. The relative edge line width is the ratio of L1 / L and the ratio of L3 / L. FIG. 2 is a cross-section of a right-angled quadrilateral tablet. That is, the width B is different from the length L of the tablet. In FIG. 2, the ridge width, the relative ridge width, and the cavity width can be obtained in the same manner as in the longitudinal section in FIG.
Regarding the measurement of the absolute ridge line width, a desired measurement length unit can be adopted. This is because the relative ridge width is obtained by dividing the measured value by the formula of the ratio to obtain the relative ridge width.

According to a preferred embodiment of the present invention, the relative ridge width is 0.4, preferably less than 0.3,
In particular, it is less than 0.25.

[0014] The ridge width can be varied according to the absolute dimensions of the tablet. However, in general, the relative ridge width is at least 0.005, preferably at least 0.01
Especially at least 0.015. As a general rule, the smaller the size of the tablet itself, the larger the selected relative ridge width so that the ridge width can actually be handled more reliably. A person skilled in the art can select the ridge width without any problem, and the above-mentioned minimum width is merely a guide, and according to the disclosure of the present specification,
Understand that it can change.

“Relative Cavity Depth” Similar to the above definition of relative ridge width, a relative cavity depth can be defined. In FIG. 1, H is the total height of the tablet, and H1 is the height (ie, depth) of the cavity. The H1 / H ratio can be defined as "relative cavity depth". According to one preferred embodiment of the present invention, it is preferred that the relative cavity depth ≤ 0.5. Also according to a preferred embodiment of the present invention, the relative cavity depth is less than 0.5, preferably less than 0.4, especially less than 0.35.

According to one preferred embodiment of a right quadrilateral tablet invention, the form of tablets, a right-angled quadrilateral, the relative ridge width of the cross section and the relative ridge width of a longitudinal surface, Their sizes are different from each other. The cavity in such a case may be circular, elliptical or rectangular.

However, according to a preferred embodiment of the present invention, the shape of the tablet is a right quadrangle, and the relative ridge width in the vertical cross section and the relative ridge width in the cross section are the same. Such tablets can be manufactured. Again, the cavity may be circular, oval or rectangular.

[0018] With respect to such a rectangular quadrilateral tablet, by making the relative ridge width of the longitudinal section and the relative ridge width of the transverse section the same, the absolute ridge width can be changed according to the difference between the length and the width. , Their sizes are different from each other. The only exception is the special case of a quadrilateral, which corresponds to a tablet in the form of a square, in which the same relative edge width gives the same absolute edge width. One skilled in the art can select the same or different absolute ridge widths as well as the same or different relative ridge widths according to the disclosure of the present invention, depending on the aesthetic impression preference. In this case, for selection purposes, the only criterion is that the relative ridge width at the cavity point closest to the cavity edge is ≦ 0.4 for each tablet edge.

Circular Tablets According to one preferred embodiment of the present invention, circular laundry detergent / detergent tablets can be produced without problems.

Cavity Configuration One skilled in the art will be able to select a suitable cavity configuration depending on the configuration of the laundry detergent / detergent tablet. That is, the shape of the cavity can be freely prescribed without any limitation, and an octagonal tablet having a round-shaped cavity or a square-shaped cavity can be manufactured. For such tablets, a maximum of eight relative ridge widths should be considered. According to a preferred embodiment of the present invention, the form of the cavity is a square, circular or elliptical cavity.

According to one particularly preferred embodiment of the invention, it is a combination of the principle of a known multilayer tablet with a tablet with cavities. Thus, a laundry detergent / detergent tablet with cavities can be manufactured in the form of two or more layers. In this way, the aesthetics can be further improved by coloring the two layers with different colors and filling the cavity with a third color material.

The cavities may be in an orthorhombic form, such as a roof tile form. Alternatively, for example, the cavities may be circular or elliptical in plan view, as described above. In addition, the shape of the cavity need not be a right-angled quadrilateral, as illustrated in simple form, in a longitudinal or transverse section of the tablet. Rather, according to one preferred embodiment of the invention, the edge angle of the cavity is greater than 90 degrees, preferably greater than 95 degrees, especially greater than 100 degrees. The term "cavity edge angle" as used herein is defined as:
For example, in FIG. 1, it means each of ∠abc and 意味 def. Suitably, the cavities may have a triangular form. However, curved forms are also possible, for example, truncated ellipses or truncated semicircular forms are also possible and suitable, for example in longitudinal and / or transverse sections as well.

According to a preferred embodiment of the present invention, in the cavity, the contour from the cavity edge base (b or e) to the cavity center point gradually descends. As described above, referring to FIG. 1, the line segment cd is not a straight line but a curve that swells in a downward hemispherical shape, and the lowest point of the curve exists at the center of the line segment cd. . The curve is
It is possible to start immediately from point b or point e, so that the cavity does not have a vertical flank bc or de (oval shaped cavity).

Tablet Ingredients The ingredients in each region of the tablet are not limited and can be readily determined by one skilled in the art. Of course, preferably, the cavities of the tablet are particularly filled with the components of the laundry detergent / cleaning agent. By distributing each component into a tablet and a cavity, the tablet can be provided with further different layers, and the design of the tablet can be virtually limitless.

EXAMPLES Next, the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.

From the compressible composition for a dishwasher, a rectangular quadrilateral tablet with an elliptical cavity was prepared with the following parameters: Length: 3.6 cm Ellipse length: 2.2 cm Width: 2.6 cm Ellipse width: 1.6 cm Height: 1.8 cm Cavity depth: 0.6 cm

The elliptical form is symmetrically arranged, with absolute ridge widths of 0.7 cm (L1, L3) and 0.5 cm (B
1, B3). The relative edge line width is as follows. L1 / L = L3 / L = 0.194 B1 / B = B3 / B = 0.192 The relative cavity depth is 0.333 = 0.6 cm / 1.8 cm.

Tablets could be produced without problems by rotary tablet presses with production rates exceeding 10,000 units / hour. There was no interruption during the 4 hour test run. Further, the tablet could be produced without forming a cake and without causing breakage of the ridge line or other damages on the compression die of the tableting press. Reducing the length of the ellipse to 0.5 cm (absolute ridge width 1.55 cm, relative ridge width 0.43) forms a mechanically unstable tablet, which results in ridge breakage and caking on the compression die. Was.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a longitudinal section of a tablet.

FIG. 2 is a cross-sectional view showing a cross section of the tablet.

[Explanation of symbols]

 L: Tablet length L1 and L3: Edge width L2: Cavity length H: Total tablet height H1: Cavity height

────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Christian Nich, Federal Republic of Germany Day-40591 Düsseldorf, Otto-Hahn-Strasse No. 185 (72) Inventor Jürgen Höhler Federal Republic of Germany-Day 40593 Wech No. 20 (72) Inventor Karl-Martin Feiser Federal Republic of Germany Day-47249 Deusbruck, Am Haupweg 7-seer (72) Inventor Hans-Josef Behrweian Federal Republic of Germany Day-41539 Dolmagen, Karl-Friedrich -Sinkel-Strasse 43 F term (reference) 4G004 MA02 4H003 BA03 BA17 DA01 DA06 DA19 FA16

Claims (14)

[Claims] 1. A laundry detergent or detergent tablet having a cavity with a relative ridge width ≦ 0.4 and comprising a compressed particulate material. 2. Tablet according to claim 1, wherein the relative ridge width is less than 0.4, preferably less than 0.3, especially less than 0.25. 3. The tablet according to claim 1, having a cavity with a relative cavity depth ≦ 0.5. 4. The relative cavity depth is less than 0.5, preferably less than 0.4, in particular
4. The tablet according to claim 3, which is less than 0.35. 5. The tablet according to claim 1, wherein the tablet has a shape of a right-angled quadrilateral, and the relative ridge width of the longitudinal section and the relative ridge width of the transverse section are different from each other. Tablet as described in. 6. The tablet according to any one of claims 1 to 4, wherein the tablet has a shape of a right-angled quadrilateral, and a relative ridge width of a longitudinal section and a relative ridge width of a transverse section are the same. . 7. The tablet according to claim 1, wherein the tablet has a circular shape. 8. The tablet according to claim 1, wherein the cavity has a square shape. 9. The tablet according to claim 1, wherein the cavity has a circular shape. 10. The tablet according to claim 1, wherein the cavity has an elliptical shape. 11. A tablet according to any one of claims 1 to 10, comprising two or more layers. 12. The cavity edge angle is greater than 90 degrees, preferably 90 degrees.
Tablet according to any of the preceding claims, wherein the angle is greater than 95 degrees, in particular greater than 100 degrees. 13. The tablet according to claim 1, wherein in the cavity, the contour from the cavity edge base to the cavity center point gradually descends. 14. The tablet according to claim 1, wherein a component of a laundry detergent or a detergent is filled in the cavity.