JPH02149275A - Base material for adhesive tape and medical adhesive tape - Google Patents

Abstract

PURPOSE:To form such a tape that has proper expanding property without fuzzing from its back face when rewound and that will not come off even when stacked and that will be closely stuck to skin and be soft and highly permeable by forming the tape from unwoven fabric the fibers of which are partially combined with one another by a binder formed by the mixing together of surface lubricants. CONSTITUTION:Fibers of pulp, hemp or rayon are dispersed and mixed in water to form paper with a basis weight of 22g/m<2> by means of a continuous paper machine. Acrylic adhesives are applied and dried on the sticking face of releasable paper, the surface of which is processed with silicone, so that a layer of adhesives is formed. The layer of adhesives is applied on a base material together with the releasable paper and the material is temporarily wound into a large roll. Thereafter, while the large roll is rewound and the releasable paper released, the base material is wound round a paper core into a small roll in such a manner that the layer of adhesives is located outside, and the small roll is then cut to manufacture a medical adhesive tape. The tape is rewound and then wound round a finger; it will then have proper resistance during rewinding and be closely stuck to skin without fuzzing, and also be permeable and provide soft touch.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a base material for adhesive tapes and adhesive tapes for medical and medical use.

[Conventional technology]

The base material of adhesive tapes for fixing gauze, absorbent cotton, etc. to the skin is generally made of paper, non-woven fabric, etc. in order to have good breathability and feel good against the skin.

The base material used for this is required to have appropriate strength, to have an appropriate unfolding force during unwinding, and to be free from the phenomenon that the fibers on the back surface of the base material are peeled off, that is, so-called fuzzing. Also, it is necessary to be able to apply multiple layers. For this reason,
A base paper is used that is dipped in an acrylic ester emulsion or the like and then dried to bind the fibers together.

In addition, it is thought that no staining occurs on the other side of a base material provided with an adhesive layer on one side (for example, Japanese Patent Publication No. 60-9817).

[Problem to be solved by the invention]

With the conventional paper and nonwoven fabric base materials mentioned above, it is necessary to apply a release agent to the back side of the adhesive layer, and when applying a release agent, it is difficult to adjust the peeling force, which may The peeling force tends to decrease, and there are cases where overlapping is not possible in practice. Further, a sizing film and a back treatment film are provided as described in Japanese Patent Publication No. 60-9817. For products, two steps are required for their coating.

The present invention solves the above-mentioned conventional drawbacks, and provides a tape base material and surgical adhesive tape that do not require the application of a release agent to the base material surface and have the following features: It is something to do.

[Means to solve the problem]

The present invention is a base material for an adhesive tape characterized by being made of a nonwoven fabric in which fibers are partially bound together by a binder in which a release agent is mixed, and a base material for an adhesive tape is characterized in that the fibers are partially bound together by a binder in which a release agent is mixed in. This medical adhesive tape has an adhesive layer provided on one side of a base material that is partially bound together.

In the present invention, various binders are used such as acrylic, vinyl acetate, synthetic rubber, starch, and polyvinyl alcohol, and their properties include emulsion type dispersed in water, aqueous solution, and dissolved in solvent. etc., but acrylic emulsions are particularly preferred.

In addition, the mold release agent is poly(Ll-sihydrono(-70 hexyl methacrylate), poly(N-ethyl/L/, N-/
Copolymer of phenylmethylsiloxane and dimethylsiloxane - Methylphenylsiloxane having 2-(2-hydroxyethylthio)ethyl group and 10H group Emulsions of silicone-based polymers such as condensates with acrylic polymers having long-chain alkyl groups such as polyester acrylate, polyester acrylamide, polyvinyl stearate, and cellulose tristearate are used as the base. The binder mixed with a mold release agent is used as a solid content type lid, and the binder is mixed with a mold release agent.
100% impregnated.

Also, the amount of mold release agent added is 0.5 in terms of solid content relative to the binder.
~15% can be used. If the amount is greater than the addition percentage of the mold release agent, the self-back adhesive strength will be too small to allow overlapping.

〔Example〕

Example (1) Dispersing and mixing fibers of hemp, hemp, and rayon in water,
A base paper having a basis weight of 222 or more may be appropriately selected using a continuous paper machine. The papermaking method may be either wet or dry. The base paper is preferably 12y to 110y/might. As a binder, 100 parts by weight of acrylic emulsion (solid content 46%, product name Primal HA-8 manufactured by Nippon Acrylic Company), 10 parts by weight of a fluorine-based mold release agent (parts 0 thread polymer emulsion, solid content 30%) were added and mixed to prepare a mixed solution. Next, the mixed solution of the acrylic emulsion and the fluorine-based mold release agent is poured into the dipping liquid vat of the resin impregnating device, and the base paper that has been made is continuously dipped into this liquid, and then passed through a embossed roll to mix the excess. The liquid was squeezed out, and the paper was passed through a hot air oven while avoiding applying strong tension to the base paper, and then passed through a hot drum for drying.

In this way, a base material for an adhesive tape according to the invention of @1 was obtained, in which the fibers of the base material were partially bonded to each other with a binder mixed with a release agent. The weight of this tape base material is 36 f/
It was lrl.

Example (2) Separately, on the release surface of release paper whose surface was treated with silicone, an acrylic system with a solid content of 40% was prepared by dissolving 50 parts by weight of 2-ethylhexyl acrylate, 40 parts by weight of butyl acrylate, and 7 parts by weight of others in toluene. Apply adhesive and dry to a thickness of 3
A 5 μm adhesive layer was formed. This adhesive layer was laminated together with release paper to the base material obtained in Example (1) to form a thick roll. Then, using a tape measure, remove the release paper and roll the base material around a 1-inch paper core with the adhesive layer on the outside, cut this into a 25W width, and use medical adhesive. I made a tape.

When this tape was rewound and wrapped around a finger, it had a moderate resistance when rewound, did not fluff, adhered well to the skin, and had a good texture and soft touch. Moreover, even if it was left as is, it did not peel off from the overlapping edges. Furthermore, when the tape was pasted in a cross pattern over gauze applied to the affected area, it adhered well to the gauze and the skin, and the overlapping portions of the tapes did not lift or peel off.

Next, we used this tape for 3 months at room temperature, and 4
When a similar test was conducted using a tape that had been kept at 0°C for 3 months, there was almost no change in the unwinding resistance, and there was no fuzz on the back of the tape (it showed excellent performance similar to that immediately after production).

Example (3) A tape produced in the same manner as in Example (1) except that an emulsion (solid content 38%) of silicone polymer (copo 1 Jr- of phenylmethylsiloxane and dimethylsiloxane) was used as the mold release agent. When a medical adhesive tape similar to that of Example (2) was produced using the base material and the same test was conducted, similar excellent results were obtained.

As a result, medical adhesive tapes using this tape do not become fluffy on the back side when unwinding (they have moderate expandability,
It can be adhered well to the skin without peeling even when applied multiple times.
Flexible and has a good texture.

In addition, it has great practical effects, such as being able to be manufactured by a simple method that does not require a coating process or coating device for a mold release agent or sizing agent.

Claims (1)

[Scope of Claims] 1. A base material for an adhesive tape, characterized in that it is made of a nonwoven fabric in which fibers are partially bound together by a binder mixed with a release agent. 2. A medical adhesive tape comprising an adhesive layer on one side of a base material in which fibers are partially bound together by a binder mixed with a release agent.