JPS63502841A - retractable diaper tabs - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to disposable diapers comprising adhesive tab fasteners, particularly diaper closures. This invention relates to elastic tab fasteners that can be used in various applications.

By using the diaper tab as an elastic waistband on both sides, you can Elastic diaper tabs have already been proposed as a means of increasing diaper fitness. Ru.

An early proposal is U.S. Patent No. 3,800,796 by Jacobs, E gan is an improved and modified version of Jacobs elastic tab. U.S. Patent No. 4,051,853 and U.S. Patent No. 4,066.0 of 5 chaar. There are issues such as No. 81.

One of the problems with elastic tabs is that they must be prevented from stretching too early before the initial fixation of the diaper. especially under the inertial stress associated with the high line speeds required for mass production. Stabilizes the elastic portion of the tab material to allow for precise placement of the tab on the diaper. (i.e., preventing elongation). This problem of premature elongation One approach to No. According to this approach, breakable “attachment parts” "40 (Figure 3), 140 (Figure 6), or 240 (Figure 7) is a temporary stabilization. fulfill. This "attachment part" is the weakened joint in the center of the tab. This seems to mean that the joint is completely closed until the final user secures the diaper. Do not separate. In Tritsch, the form of this weakened joint is also made from diapers. Resists breakage under high inertial stresses during construction, yet expands the diaper and its tabs. It also discloses a mode in which the device can be conveniently separated when worn by an infant. do not have.

Go to 11”1 The present invention prevents premature elongation of a retractable diaper tab by separating it under stress depending on the situation. Prevents the use of weakened joints that are required to be removed or separated Provide stabilizing means for i.e. only when unfolding the tabs to wear the diaper. The tab is configured such that the extensible tab material is freely extensible. expand tab Until then, the telescoping tab material can be used before the tab is installed, during the installation, and after the tab is installed. The ends remain fixed to the non-elastic means.

Therefore, the tabs of the present invention are actively non-stretchable until deployed for diaper donning. However, it becomes elastic just by unfolding, and depends on appropriate breakability such as joints. There is no need to

Brief description of the drawing In the drawings, web and coating thicknesses may be greatly exaggerated. be.

Figure 1 shows a cross-section of the device (direction perpendicular to the plane of the paper) after it has been constructed according to the present invention. A cross-section schematically showing diaper tab material after being cut in a direction to form individual tabs. Figure 2 shows the tab shown in Figure 1 used by diaper manufacturers to wrap part of the diaper. A cross-sectional view showing the state in which it is bent and fixed. FIG. 3 is a sectional view showing the tab in an unfolded state for wearing a diaper; FIG. 4 is a perspective view showing a reduced size diaper secured with a pair of tabs; FIG. 5 is a sectional view showing another embodiment of the present invention, and FIG. 6 is a sectional view showing still another embodiment. 7 is a detailed view of the pointed out portion in FIG. 6.

Brief description of the drawing The tab (fastener) shown in Figure 1 is cut from a continuous tape diaper tab material. Therefore, FIG. 1 is a simplified cross-sectional view of the diaper tab as well as an individual tab. It is also an elevation view of the building. Diaper tab material is coated and laminated line (first Originally, it was suitable for forming in a long process along the machine direction (orthogonal to the paper plane in Figure 1). Consists of flat but flexible layers.

These layers are the payout release coating 1, the main web layer 2, the pressure sensitive adhesive layer 3, and the polyamide layer. A stretchable web layer 4 such as urethane film, a pressure sensitive adhesive layer 5, and a non-woven material such as paper. made of shrink material with a suitable release coating 6 along a portion of one side. The backing web 7 is provided with release means, and the pressure sensitive adhesive! ! Contains 8. These are the Each tab 10 is formed from a tab material and a tab material. Longitudinal direction of each tab 10 At the midpoint 20 the layer 2 is cut out with the coating 1 to form a slit. , the adhesive layers 3 and 5 are interrupted as shown, and the coating 6 starting from one end is also formed. Interrupted. Adhesive layer 3.5 has almost no mechanical strength, and as shown in the figure, There is no need to cut it off, but doing so will help the development process go smoothly as described below. Become.

The tab 10 has first and second ends 11.12 and an intermediate portion between the ends 11.12. and a central portion including point 20. Both web layers 4 and 7 are uninterrupted; The elastic web layer 4 is glued to the non-elastic web layer 7 at both ends 11.12. There is. At the first end 11 this adhesion is permanent and at the second end 12 Since the release coating 6 is provided on the non-stretchable web layer 7, this adhesion is self-releasable. It is present.

FIG. 2 shows the tab of FIG. 1 attached to the side edge plies of diaper 15. As shown, Layers 1-5 are located relatively far from diaper 15. These layers 1-5 are the outer layer means , layer 7.8 is adjacent to the diaper and its end It, 12 is at the side edge of the diaper. It constitutes an inner layer means permanently adhered to both sides.

The outer layer means 1-5 is permanently glued to the inner layer means 7.8 at the first end 11 and The two ends 12 are releasably bonded. The second end 12 is inside the diaper 15. Located on side 15a.

The inner layer means is non-stretchable since it includes the non-stretchable web layer 7, and the outer layer means 1-5 are non-stretchable. This non-stretchability is ensured by the outer layer as long as it is glued to the inner layer means at the end 11.12. Also given in columns 1-5. Therefore, in the states shown in Figures 1 and 2, The tab structure is non-stretchable even when

When the tab 10 has to be unfolded for donning the diaper, the outer layer means 1-5 are By peeling away from the inner layer means 7°8 at the second end 12, The adhesive layer 5 (not shown in FIG. 3) is exposed and attached to other parts of the diaper. Set. Once peeled off, the primary mechanical link between the ends of the outer layer means is the stretch layer 4. Because of this, the outer layer means 1-5 is no longer stable to elongation.

This conversion from the non-stretched state to the stretchable state is achieved by converting the inner layer to the outer layer in the second pant section 12. This can be achieved simply by peeling off the means, and sufficient damage prevention for elements such as joints can be achieved. There is no need to rely on existence.

The elasticity is concentrated in the central part surrounding the midpoint 20 and located between the ends 11 and 12. It is desirable that Even when the tab is unfolded, the ends 11 and 12 are 11.12 due to the anchoring action of the non-stretchable support layer 2 which remains adhered to the stretchable layer 4. This prevents the elongation.

FIG. 4 shows a diaper 15 worn by an infant (not shown) unfolded as shown in FIG. It is then shown with two tabs 10 for securing the diaper.

FIG. 5 shows the release coating 1, rather than the central layer as shown in FIGS. 1 to 3. ) The positions of the support layer 2b and the elastic layer 4b are adjusted so that the uppermost layer of the stack is the elastic layer. Another embodiment is shown which is substantially similar to the above configuration except for the changes.

6 and 7, the non-stretchable support layer 2 is simply attached at the midpoint 20 as shown in FIG. Rather than forming one slit, multiple parallel slits are provided, and parallel slits A small portion of the support layer 2 that is relatively non-shrinkable in between holds the stretch-blocking micro-anchors 2C. Embodiment substantially similar to tab 10 of FIGS. 1 to 3 except that tab 10 is formed to show the appearance. Also, the adhesive layer 3 is not interrupted at the intermediate point 20, and the adhesive layer 3 is not interrupted at the intermediate point 20. C serves to bond the micro-anchor 2C to the elastic layer 4. This configuration is By stabilizing the elastic layer 4, it tends to become a little looser than the ideal condition. This is preferred in that it limits and controls the elongation effect.

The present invention has been disclosed above based on examples, but without departing from the scope of the present invention. , that various changes may be made by adding, improving, or omitting details. Needless to say. For example, adhesive layer 3 is not a pressure sensitive adhesive, but a “permanent” adhesive or or simply a heat seal or weld field between layers 2.4 (interrupted at position 20) It may be a surface.

In addition, the present invention can be used, for example, when the diaper is opened again after being fixed, the tabs are peeled off. Close the diaper again, leaving part of the tab separated from the diaper. The same as in the present application, which functions as an ``adhesive point'' or ``target'' for ease of use. Also applicable to configurations such as those disclosed in Assignee's U.S. Pat. No. 4,020,842 can.

The invention also applies to surgical drapes, surgical gowns, disposable garments, sheets, carpets, etc. It can also be applied to applications that require elastic tab fasteners, such as bags and envelopes. .

Accordingly, unless limited by the scope of the claims, the present invention encompasses the specific aspects disclosed above. It is not limited to detailed configuration.

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Claims (8)

[Claims] 1. With tap fasteners for disposable diapers or other tap-fastened articles The tap fastener has a length, a width, and a thickness, and both ends in the length direction. and a central portion therebetween, and having inner layer means and outer layer means in the thickness direction, said inner layer means being permanently adhered to both sides of the article side edges at said ends; outer layer means is permanently adhered to said inner layer means at a first of said ends; the inner layer means is releasably adhered at the second end, and the inner layer means is attached to at least the inner layer. The central portion is non-stretchable, and the inner layer means is peelable toward the second end. The non-stretchability of the inner layer means is imparted to the outer layer means while being adhered to the front layer means. When the outer layer means is peeled from the inner layer means at the second end, the outer layer means is expandable and contractible in the central part, so that the front part can be stretched until the peeling is performed. In particular, the inner layer means contributes to preventing premature elongation of the tap fastener. Tap fasteners for disposable diapers or other tap-fastened articles. 2. The tag according to claim 1, wherein the elasticity of the outer layer means is concentrated in the central portion. Pfasna. 3. outer layer means adhere to the elastic layer and to the elastic layer at the first and second ends; However, at least a portion of the central portion is bonded to the elastic material layer. 3. The tap fastener according to claim 2, further comprising a non-stretchable material layer. 4. Claim 3, wherein the non-stretch material layer is located outside the stretch material layer. Tapfasna. 5. Claim 3, wherein the non-stretchable material layer is located inside the stretchable material layer. Tapfasna. 6. The outer layer means is formed from a portion of the non-stretchable material layer facing the central portion, or Claim 1 comprising individual micro-anchors cut out and adhered to said elastic layer. Tap fastener according to item 3. 7. The releasable adhesion of said outer layer to said inner layer is along only a portion of the length of the tape. Claim 1 achieved by a release coating having an active surface extending over Tap fasteners as described in section. 8. A disposable diaper having at least one tap fastener on a side edge, The tap fastener has a length, a width, and a thickness, and has both ends and the like in the length direction. having an inner layer means and an outer layer means in the thickness direction; means are permanently connected to both sides of the diaper side edge at said end portions, and means are permanently connected to said outer layer; means permanently adhered to the inner layer means at a first of the ends; the inner layer means is releasably adhered at the second end, and the inner layer means is attached at least to the central portion; the inner layer means is in releasable contact at the second end; In the worn state, the non-stretchability of the inner layer means is imparted to the outer layer means, and the outer layer means is When the layer means is peeled from the inner layer means at the second end, the outer layer means By being able to expand and contract at the central part, the inner part can be expanded and contracted until the peeling is performed. characterized in that layer means contribute to preventing premature elongation of said tap fastener. disposable diapers.