JPH04124138U - Adhesive tape used for disposable diapers, etc. - Google Patents

Abstract

(57) [Summary] [Purpose] To provide an adhesive tape for use in, for example, disposable diapers, which has good flexibility and texture, does not damage the skin, has sufficient strength, and can be thermally bonded at one end. . [Structure] The tape base material is composed of a nonwoven fabric made of a mixed multi-fiber yarn made of a high melting point material and a low melting point material whose melting points differ by at least 5°C, and one end of the tape base material is thermally bonded. An adhesive layer is provided at the other end.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is suitable for fastener tapes for connecting and fixing disposable diapers, etc. Adhesive tapes used as fixing tapes for various household items It is.

0002

[Conventional technology]

Conventionally, for example, the front and back parts of a disposable diaper were connected to secure it to an infant, etc. used a fastener tape consisting of a tape base material and an adhesive layer. The tape base material may be a type made by laminating non-woven fabric such as rayon non-woven fabric and paper material. The mainstream type is non-woven fabric with plastic lamination on both sides. Ru.

0003

[Problem that the idea aims to solve]

However, the laminated type is expensive, and the laminated type is said to easily damage the skin. In addition to the disadvantages of non-woven fabrics, both of them reduce the flexibility of non-woven fabrics and reduce tear resistance. Due to the dependence on the laminated paper and plastic layers, the The drawback was that it would break if force was applied to the main part.

0004

[Means to solve the problem]

The present invention provides a new adhesive tape that solves the drawbacks of the conventional technology. The gist of this is that the tape base materials have melting points that differ by at least 5°C. A non-woven fabric made from a mixed multi-fiber yarn consisting of a high-melting point material and a low-melting point material. One end of the tape base material is thermally bonded, and the other end is provided with an adhesive layer. It is in the fact that it is being given.

[0005]

【Example】

An example of the present invention will be explained in detail below using the drawings. In Figure 1, A is the back end of the diaper, and this end is generally the top that contacts the skin. It is composed of a sheet 1 and a back sheet 2 on the front side. 3 is at least fused A mixed multi-fiber yarn consisting of a high melting point material and a low melting point material with points different by 5°C was used. A fastener tape base material made of a non-woven fabric, one of which is attached to the edge of the diaper. The other end has an adhesive layer 5 on the same surface as the 4 surfaces that are thermally bonded. is provided.

[0006] The zipper tape is usually rolled into a roll before being thermally bonded to the diaper. If necessary, the back surface of the side where the adhesive layer 5 comes into contact may be coated only on the contact area or on the entire surface. A release layer (not shown) may be formed over the entire surface. The part with four thermally bonded sides The release layer on the back side is preferably made of heat-resistant silicone or fluorine-based material, and is suitable for thermal bonding. Prevents the attachment jig from adhering to the back of the zipper tape. The film wrapped in a roll Zipper tape C is cut to a specified size in the width direction of the tape and is thermally bonded to the diaper. be done. Release paper may be temporarily attached to the surface of the adhesive layer 5, and the adhesive layer may have spots or stripes. It may be partial, such as.

[0007] 2 and 3, the adhesive layer 5 is provided on the side opposite to the four thermally bonded surfaces, and that a release layer 6 is provided on the contact surface of the adhesive layer 5 on the same surface that is folded in half. It is the same as FIG. 1 except for. In addition, a release layer is provided on the back surface that the adhesive layer 5 contacts. It is better.

[0008] Figure 4 shows the assembled diaper with the zipper tape C shown in Figure 1 attached. 5 shows the assembled state of FIG. 2. In drawings, An example of Snur Tape C attached to the back A of the diaper was shown, but it is attached to the center of the front opening. It may also be attached by thermal bonding.

[0009] The fastener tape base material has a melting point of at least 5°C, preferably 20°C or higher. Nonwoven made of mixed multi-fiber yarn made of high melting point material and low melting point material with different melting points Composed of cloth. The materials used are polyester resin and polyamide resin. fat, polyvinyl chloride resin, polyacrylic resin, polyvinyl alcohol resin , polyvinylidene chloride resin, acrylonitrile resin, polyethylene resin, Polypropylene resin, ethylene-propylene copolymer, monoolefin unsaturated monomer and one or more other olefinically unsaturated monomers copolymerizable with it staples or filaments made of copolymers, etc., and rayon, cotton, and gas Examples include lath fiber, cellulose, and at least two or more of these. The mixed multi-fiber yarns are combined so that their melting points differ by 5°C, preferably by 20°C. However, fibers made of low melting point materials can be used, for example, as surface materials for diapers (backs and tops). Psheet) is generally composed mainly of polyolefin resin. Considering thermal adhesion, it is desirable to select a material with a melting point of approximately 200°C or less. It's a good thing.

[0010] The mixed multi-fiber yarn made of the two materials can be produced by, for example, twisting and twisting fibers made of a high-melting point material and fibers made of a low-melting point material, mixing both fibers and then twisting them together, or It is made by forming a core-sheath structure in which the surface of the fiber is partially or completely coated with a low-melting point material, or by bonding the two together to form a conjugate structure. It is a material that is substantially integrated with the melting point material and has approximately the same length, and is used in the form of staples (short fibers) or filaments (long fibers), and is a nonwoven fabric with a basis weight of 10 to 300 g/m ² by a conventional method. The ratio of high melting point material to low melting point material per unit volume is 1:9 to 9:1, preferably 3:7 to 7:3, by weight.

[0011] The nonwoven fabric made in this way can be used as a zipper tape base material as is. However, one side is a heated roll (may be a textured roll) and the other is a non-heated roll. Passing between a pair of rolls that are heated rolls or both are heated rolls, The low melting point materials at least in the surface portions may be partially or entirely fused to each other. Heat treatment further improves the interlaminar strength and tear strength of the nonwoven fabric.

[0012] An adhesive layer 5 is provided on about 1/2 to 1/3 of the length of the nonwoven tape of a predetermined width, and a release layer 6 is provided on the same side and/or back side of the layer 5 as necessary. A fastener tape C is provided. The fastener tape C is cut to a predetermined size in the width direction and is thermally bonded to the front or back of the diaper under heating and pressure conditions of 100 to 300°C x 2 to 200 kg/cm ² x 0.1 to 5 seconds. .

[0013] For example, polyester fiber yarn with a thickness of 2 to 3 deniers (melting point 255 to 260°C ) was coated with polyethylene resin (melting point 115°C) to a thickness of 2 to 3 μm. A zipper tape made of non-woven fabric made of mixed multi-fiber yarn is attached to the front of the diaper. When heated and pressed, the bond is 1.5 to 2 times greater than when bonded with a conventional adhesive layer Provides adhesion strength.

[0014]

[Effect of the idea]

The adhesive tape used for disposable diapers, etc. of this invention does not contain any specific non-metallic materials as its base material. Because it uses a single woven fabric, it has good flexibility and texture, and does not hurt the skin. It has sufficient strength and is inexpensive because one end can be thermally bonded. have

[Brief explanation of drawings]

FIG. 1 is a partial side view showing an example of the present invention.

FIG. 2 is a side view showing another example of the present invention.

FIG. 3 is a side view showing the fastener tape of FIG. 2 in a folded state;

FIG. 4 is a front view showing the assembled state of the diaper.

FIG. 5 is a front view showing the assembled state of the diaper.

[Explanation of symbols]

3 Fastener tape base material 4 Thermal adhesive 5 Adhesive layer 6 Release layer

Claims (2)

[Scope of utility model registration request] Claim 1. An adhesive tape for use in disposable diapers, etc., wherein the base material of the tape has a melting point of at least 5.
It is composed of a non-woven fabric made of a mixed multi-fiber yarn made of materials with high and low melting points of different degrees Celsius, and one end of the tape base material is thermally bonded, and the other end is provided with an adhesive layer. Adhesive tape used for disposable diapers etc. 2. The adhesive tape according to claim 1, wherein the adhesive tape used for disposable diapers or the like is a zipper tape.