JPH08187113A - Retainer - Google Patents

Abstract

PURPOSE: To provide a retainer for winding and retaining an end part of a web such as a bandage or a paper diaper made of a scabrous material such as woven or unwoven fabric so as to fix the same, which exhibits bindability, fixability, reusability and protectability for the web to be retained against damage, which has suitable fastenability and which is excellent in mass productivity. CONSTITUTION: An expandable part 2 made of thermoplastic elastomer having a rubber-like elastic modulus is formed at its opposite sides with locking parts 1 made of rigid plastics, each of the locking parts has a catching part formed of several protrusions on one and the same side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fastener suitable for end-winding a wrapping material such as a woven cloth or a non-woven cloth and fixing a bandage or a paper diaper.

[0002]

2. Description of the Related Art Conventionally, an adhesive tape or a velcro tape has been known as a stopper. However, the adhesive tape is not suitable for adhering to a material having a rough surface such as a woven cloth or a non-woven cloth, and is easily peeled off even when the scroll is wound, and the adhesive is liable to be transferred to the woven cloth or the like. Further, in a paper diaper, there is a problem that when the diaper is manually operated using cream or ointment, the cream is transferred to the adhesive surface and the adhesive strength is easily lost. Although there is a proposal for a disposable diaper using velcro, there is a difficulty that it does not hinder the movement of the babies and it is difficult to adjust and fix the diapers so that the babies do not come off due to the movement of the babies.

On the other hand, for fixing a bandage, a flat rubber cord with a stopper and a net have been known. However, the flat rubber cord with a stopper has a problem that it is easily scratched by the holes of the stopper, and the net has a poor fixing force and the bandage easily loosens during movement. Although a tape for bandage stopping is also known, it has a problem that it has a weak adhesive force like the above-mentioned adhesive tape and the bandage is easily loosened while moving, and that it causes pain on the skin when peeled off.

[0004]

DISCLOSURE OF THE INVENTION The present invention provides good bundling or fixability, reusability, and the like in end winding of a roll of a rough surface material such as woven cloth or nonwoven cloth, fixing of bandages and disposable diapers, etc. The object is to develop a fastener that shows the non-damage of the material to be fastened, has an appropriate tightening property, and is excellent in mass productivity.

[0005]

DISCLOSURE OF THE INVENTION According to the present invention, system stoppers made of hard plastic are integrally provided on both sides of an elastic portion made of a thermoplastic elastomer having rubber elasticity, and the system stoppers on both sides have the same side. The present invention provides a stopper characterized in that it has a hooking portion composed of a large number of protrusions on one surface thereof.

[0006]

[Function] With the above-described structure in which the elastic portion is arranged in the middle and the system stoppers are integrally provided on both sides of the elastic portion, the proper tightening property is achieved based on the smooth transmission of the stress of the elastic portion to the system stopper. It can be attached or fixed. Also,
By forming the system stopper with a large number of protrusions made of hard plastic, good reusability and non-damage that the material to be stopped is not damaged can be provided.

[0007]

EXAMPLE A stopper of the present invention has integrally formed system stoppers made of hard plastic on both sides of a stretchable section made of thermoplastic elastomer having rubber elasticity, and the system stoppers on both sides are on the same side. It has a hooking part composed of a large number of protrusions. Examples thereof are shown in FIGS. 1 and 3 to 5. 1 is system stop, 2
Is a stretchable part, and 11 is a protrusion forming a hooking part.

As the thermoplastic elastomer having rubber elasticity which forms the stretchable portion, one having an appropriate elastic modulus can be used depending on the desired tightening property. Examples of the thermoplastic elastomer include polyurethane elastomers, polyolefin elastomers, polystyrene elastomers, soft polyvinyl chloride, various rubber polymers, and the like, as disclosed in JP-A-63-86784 and 63-63.
Examples include those described in Japanese Patent Publication No. -1420886, Japanese Utility Model Publication No. 1-130359, and the like.

The stretchable portion is usually formed in a sheet shape or a tape shape. The size is appropriately determined according to the purpose of use. From the viewpoints of handleability, manufacturability, workability, etc., 1 mm or less, 0.01 to 0.5 mm, especially 0.05
A thickness of ~ 0.2 mm is preferred. The width is 1 to 200 mm,
Especially 2-100mm, especially 3-50mm, length 5-200
mm, especially 5 to 100 mm, especially 10 to 20 mm. The stretchability of the stretchable portion can be adjusted not only by the elastic modulus of the material but also by dimensional control of thickness, width, length and the like.

The system stop portion is formed of hard plastic integrally with the stretchable portion on both sides of the stretchable portion as an intermediate portion. As the hard plastic, an appropriate one may be used, and examples thereof include polyethylene, polypropylene, polystyrene, polyester, ABS resin, polycarbonate, polyamide, polyacetal, PBT, PPS and the like.

The elastic portion and the system stopper can be integrally formed by, for example, a coextrusion molding method. Therefore, the combination of the thermoplastic elastomer for forming the stretchable part and the hard plastic for forming the system stop is important in terms of the adhesiveness at the interface between the stretchable part and the system stop and the formability of the system stop, especially the hooking part. It is determined more appropriately. As a preferable combination from the viewpoint of moldability, for example, a combination of ethylene / propylene elastomer or ethylene / butylene / styrene elastomer and polypropylene can be mentioned.

The hook portion provided on one side of the system stopper is formed by a large number of protrusions. As shown in FIGS. 2 (a) to 2 (e), the hooking structure of each protrusion has hooks or hooks at the tip of the protrusion 12, 13, 14 or mushrooms at 15, 16, etc. For example, a suitable structure can be used in which fibers or threads in a rough surface material such as woven cloth, non-woven cloth, or pile-like cloth are entangled with each other, or they are fitted and caught between fibers. Therefore, it is also possible to use a known shape such as a protrusion with a magic tape.

The hooking portions are provided so as to be on the same side in the system stoppers on both sides of the expansion / contraction portion for easy handling. If the protrusion has a hook or hook-shaped tip, the direction of the tip is the same for each system stopper as shown in the figure. It has the advantage of working and becoming stronger. Since the direction of the tip of the protrusion is related to the detachability of the stopper,
In the present invention, it is not limited to the above-mentioned unification and facing state, and the unifying property at each system stopper and the facing property at both end system stoppers are appropriately determined according to removability. You may

The density of the protrusions at the hooking portion of the system stopper may be appropriately determined depending on the bonding force, removability and the like. Generally, 1 or more per 1 cm ² , especially 3 to 1
The protrusion density is 000, especially 5 to 200.

The size of the system stopper is appropriately determined according to the purpose of use and the like, and in view of handleability, it is 1 mm or less, preferably 0.01 to 0.5 mm, particularly 0.05 to 0.2 mm. Is preferable (excluding protrusions). In addition, the height of the protrusion is 1 mm or less from the viewpoint of strength, etc.
.About.1.0 mm, particularly preferably 0.4 to 0.6 mm. Width is 1
The length is generally from 200 to 200 mm, especially from 2 to 100 mm, especially from 3 to 50 mm, and the length is generally from 5 to 50 mm, especially from 5 to 30 mm, especially from 12 to 20 mm. The thickness of the system stopper including the protrusion is preferably as thin as 0.1 mm or less.

As a specific example of the coextrusion molding method for integrally forming the above-mentioned stretchable portion and the system stop portion, there is a method of molding with one die using two extruders. That is, the nozzles of the two extruders are connected to one die, and at the exit of the dies, the thermoplastic elastomer for forming the stretchable part is located in the middle part, and the hard plastic for forming the system stop part is located on both sides of it. It is possible to form a continuous sheet by co-extruding so as to join together.

Further, the continuous sheet formed above is taken out from the die by a first take-up roll for cooling,
At that time, a roll having a large number of holes formed in a part of the surface is used as the first take-up roll, and a press roll is made so that the hard plastic in the molten state for forming the system stop portion flowing out from the die flows into the holes. Then, the first take-up roll is cooled to the second take-up roll and the projections formed through the holes of the first take-up roll are heated rolls or hot-air dryers. By subjecting the tip end portion of the protrusion to a predetermined shape such as a hook or mushroom shape by heat treatment via an appropriate heat source, the target stopper can be continuously formed in the state of a continuous sheet. The stopper is obtained by cutting the continuous sheet with a predetermined width.

In the present invention, as shown in FIGS. 3 and 5, a stopper having holding layers 3 and 6 connected to the hook portion is provided on the back surface side of the system stopper 1 having the hook portion. You can also According to this, it is possible to form a ring-shaped object by connecting the hooking portion of one system stop portion to the holding layer of the other system stop portion, and it can be used as a binding tool for rods, wires, and the like. As the holding layer, a woven cloth, a non-woven cloth, a rough surface material such as a pile cloth, or the like can be used.

The holding layer can be directly fixed to the back surface of the system stopper 1 as shown in FIG. 3, or can be fixed to the back surface side of the system stopper 1 via the adhesive layer 5 as shown in FIG. An appropriate fixing method can be adopted. The direct fixing is performed by, for example, a method in which a holding layer forming material is introduced between the first take-up roll and the press roll at the time of pressure bonding via the press roll in the step of forming the above-mentioned protrusions, and the like. be able to. The fixing treatment via the adhesive layer can be performed at an appropriate stage.

In order to improve the durability of the stopper by fixing the holding layer with good adhesion, the system stopper 1 having the hooking portion is made of a hard and tough plastic as shown in FIG. It is preferable that the plastic layer 4 is formed of a layer, and the plastic layer 4 having good adhesiveness is provided on the back surface of the system stopper 1. Therefore, in this case, the holding layer 6 is provided on the back surface side of the system stop portion 1 via the plastic layer 4, and when using an adhesive, the system stop is provided via the plastic layer 4 and the adhesive layer 5 as shown in FIG. The holding layer 6 is provided on the back surface side of the portion 1.

Examples of the hard and tough plastic forming the system stopper include polypropylene, polyamide, polyester and the like. On the other hand, a plastic having good adhesiveness is, for example, a modified polymer or copolymer of the hard and tough plastic, ethylene / vinyl acetate copolymer, from the viewpoint of the adhesion to the hard and tough plastic layer. Polymers and the like that are sometimes used as an adhesive for coalescence and the like are preferable.

With respect to the plastic layer having good adhesiveness to the above-mentioned adhesive, a double-sided pressure-sensitive adhesive tape comprising a suitable pressure-sensitive adhesive such as an acrylic type, a rubber type, a styrene / isoprene block polymer type, or the like has a good holding layer. Adhesion is possible. The double-sided pressure-sensitive adhesive tape attached to the plastic layer having good adhesiveness can also be used for an appropriate bonding purpose other than the fixing of the holding layer.

The attachment of a plastic layer having a good adhesive property to the back surface of the system stopper is achieved by adding one extruder to the continuous sheet by the above-mentioned coextrusion molding method.
Therefore, the nozzles of the three extruders should be connected to one die so that the hard plastic for forming the system stop and the plastic for forming the layer with good adhesive bond may merge in a superposed state at the exit of the die. By co-extruding, efficient molding can be achieved. In that case, the hard plastic layer for forming the system stopper is superposed so as to be on the side of the first take-up roll having the above-described many holes.

Example 1 The nozzles of two extruders were connected to one die, and at the exit of the dies, a thermoplastic elastomer for forming a stretchable portion was located in the middle portion, and on both sides thereof a thermoplastic elastomer for forming a system stop portion was formed. By the method of co-extruding so that the hard plastic is merged in the position,
A continuous sheet having polypropylene parts on both sides of the ethylene / propylene elastomer part is molded, and when it exits the die, a large number of holes with a diameter of 0.5 mm and a depth of 1 mm are formed at intervals of 1 mm to correspond to the polypropylene parts. The first take-up roll for cooling, and at the same time, pressurizing it through a press roll to cool it, and then taking it off with a second take-up roll, the tip end of the projection formed on the continuous sheet is 150 to 1
Immediately contact the hot plate at 60 ℃, then immediately 100
Cooled below ℃, the tip bent into a hook shape Height approx. 0.6
mm protrusions were formed, and the continuous sheet was cut into a width of 30 mm to continuously obtain a stopper having a sheet portion thickness of 0.1 mm.

When the above-mentioned stopper is used as a winding stopper for the winding end of the woven fabric cloth, it can be wound well.
It was possible to satisfactorily perform the 11th winding stop and removal after the winding stop / removal operation was repeated 10 times. Further, the removed piece was visually observed, but no damage such as tearing of the cloth was observed.

Example 2 When press-bonding with a press roll, a face towel cloth having a width corresponding to the polypropylene part was inserted between the first take-up roll and the press roll so as to be positioned on the back surface of the polypropylene part having the protrusions. A stopper was obtained in the same manner as in Example 1 except that the laminate was laminated.

When the above-mentioned stopper was used as a pipe or a binding tool for an electric cord, it was possible to bind the fastener in a good condition without causing a variation in any case. In addition, the 11th binding and removal after repeating the binding / removing operation 10 times could be performed well.

Example 3 The nozzles of three extruders were connected to one die, and coextrusion was carried out so that the polypropylene part and the ethylene / vinyl acetate copolymer part were merged in a superposed state at the exits of the dies. A continuous sheet in the form of a stopper was obtained in the same manner as in Example 1 except that In addition, polypropylene layer and ethylene
The vinyl acetate copolymer layers had the same thickness.

Next, a face towel cloth was laminated on the ethylene / vinyl acetate copolymer surface of the continuous sheet via an acrylic double-sided adhesive tape, and the cloth was cut according to Example 1 to obtain a stopper. When the above-mentioned stopper was used as a binding tool for pipes or electric cords, good results were obtained as in the case of Example 2.

[0030]

EFFECTS OF THE INVENTION According to the present invention, it has elasticity and exhibits a proper tightening property, is excellent in binding property or fixing property, and can be repeatedly used, and is unlikely to damage a material to be fastened such as cloth. Thus, it is possible to obtain a stopper which can be mass-produced easily and which can be widely used for end-winding stop of a roll of a rough surface material such as woven cloth or non-woven cloth, fixing of bandages, disposable diapers and the like.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment.

FIG. 2 is an explanatory view of an example of a protrusion shape.

FIG. 3 is a sectional view of another embodiment.

FIG. 4 is a sectional view of still another embodiment.

FIG. 5 is a sectional view of still another embodiment.

[Explanation of symbols]

 1: System stop portion 11, 12, 13, 14, 15, 16: Protrusion 2: Stretchable portion 3, 6: Retaining layer 4: Adhesive good adhesive plastic layer 5: Adhesive layer

Claims (3)

[Claims] 1. A system stop made of hard plastic is integrally provided on both sides of an elastic part made of a thermoplastic elastomer having rubber elasticity, and the system stop on both sides is composed of a large number of protrusions on one side on the same side. A stopper having a hook portion. 2. The stopper according to claim 1, further comprising a holding layer that is coupled to the hooking portion on the back surface side of the system stopper having the hooking portion. 3. The fastener according to claim 1, wherein the system stopper having the hooking portion is made of a hard and tough plastic layer, and the back surface of the system stopper has a plastic layer having a good adhesive property.