JPS59181159A - Surgical cloth bandage - 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 fabric surgical applications.

Conventionally, for fabric surgical procedures, styrene-butadiene latex was applied as a primer on one side of the base fabric and allowed to dry, a rubber adhesive was applied to this coated side, and a backing agent was applied to the back side of the base fabric. Coated products are known, but they have the drawbacks of poor texture and lack of water resistance.

The present invention provides a novel fabric surgical material that solves the above drawbacks, and the gist thereof is that solid matter is added to one surface of a base fabric made of rayon and/or cotton yarn. A solids concentration of 40% containing 50-97% by weight nitrile-butadiene rubber latex, 0-50% by weight solids natural rubber latex and 3-50% by weight filler.
A mixture of ~85% by weight (8 to 7oyiA<solid content) is applied, a rubber adhesive layer is provided on the coated surface, and a back treatment agent layer is provided on the back surface of the base fabric.

According to the fabric surgical material of the present invention, since a specific mixture is used as the primer layer, there is no impregnation into the base fabric, so the texture of the base fabric is not deteriorated in practical use, and the fabric has good water resistance. It has the characteristic of being able to obtain the desired characteristics.

The nitrile-butadiene rubber latex and natural comb latex used in the practice of the present invention each have a solids content of 30 to 75% by weight.

In addition, as fillers, zinc white, calcium carbonate, clay, talc, silica, etc. are used. ~50
(Solid content): It is necessary to blend in the range of 3 to 50 (wt%), and if the nitrile-butadiene rubber latex is out of the range of 50 to 98 wt% (solid content), it will not have good air flow. If the amount of natural rubber latex exceeds 50% by weight (solid content), the weather resistance of the undercoat layer will decrease, which is not preferred. Also, if the filler content is less than 3% by weight, the viscosity of the mixture will be too low and a sufficient thickness will not be obtained.
First, if it exceeds 50% by weight, the feel of the base fabric deteriorates, which is undesirable.

The mixture formed by blending these latexes and fillers has a solid content concentration of 40 to 85%, preferably 50 to 8%.
It is adjusted to be in the range of 0% by weight. If it is less than 40% by weight, the impregnation into the base fabric will increase, which is undesirable as it will lower the IIk (base), and if it is more than 85% by weight, it will be difficult to uniformly coat the base fabric and a uniform undercoat layer will not be obtained. This is not desirable because there is no such thing.

The mixture prepared in this manner contains the rayon and/or
Or a base fabric made by weaving cotton threads (for example, 68 to 75 threads/inch of 30 to 35 thread count as warp threads and 65 to 72 threads of thread of thread count 33 to 38 thread/inch as weft threads). It is coated and dried to a solid content of 8 to 70 p/rJ, preferably 10 to 609 p/rl, on the surface of the undercoat to form an undercoat sealant layer. Coating amount is 87
If it is less than /4, the water resistance of the surgical band will be insufficient, and if it is more than 70 parts, the texture of the base fabric will deteriorate, making it feel uncomfortable, which is not preferable.

Natural rubber,
A sticky substance is formed with a thickness of about 25 to 120 μm and is made of a rubber such as synthetic isoprene comb as a main ingredient, and a filler, a tackifying resin, an anti-aging agent, a stabilizer, etc.
Furthermore, a back surface treatment agent layer 75E made of a long-chain alkyl acrylate copolymer, a fluororesin, a silicone resin, etc. is formed on the back surface of the base fabric to form the fabric surgical band of the present invention.

Note that before forming the back surface treatment agent layer, a thin layer made of rubber and/or synthetic resin may be formed in order to improve the smoothness of the base fabric surface.

The fact that the cloth surgical band of the present invention has excellent texture, water resistance, etc. is illustrated in the following example. Example 1: 80 parts by weight of nitrile-butadiene rubber latex with a solid content of 60% by weight A mixture (solid content 70% by weight, viscosity 2400 cpa) was prepared by adding 20 parts zinc white to
72 vertical threads/inch (32nd thread) and 69 horizontal threads/inch
It is coated on one side of the degenerate yarn made by inserting it at a rate of 38 P/ra (solid content) and dried.

100 parts of natural rubber, 8 parts of polyterpene resin on the coating surface
A rubber adhesive solution consisting of 0 parts, 50 parts of zinc white, and 315 parts of toluene was applied so that the thickness after drying was 60 μm, and then a fluorine-based back treatment agent was applied to the back side of the base fabric. I got cloth surgical ties.

In order to evaluate the water resistance of this surgical band, we attached it to the back of the hand, immersed it in warm water at 40°C for 5 minutes, and then removed the external band, but the adhesive layer did not transfer to the skin. I couldn't see it at all. In addition, there was no practical problem with the texture.

Example 2 A mixture was prepared by blending 5 parts of zinc white with 95 parts of nitrile-butadiene rubber latex with a solid content of 70% by weight (the water resistance and texture of the hard surgical band were as good as in Example 1). The amount of the mixture applied to the base fabric was 20 y/rA.

Example 3 A mixture (
A cloth surgical band (solid content: 70% by weight, viscosity: 2900 cpS) was prepared, and the same procedure as in Example 1 was performed to obtain a cloth surgical band. The water resistance of this surgical band was good, and the texture was a little stiff, but there were no practical problems. The amount of the mixture applied to the base fabric was 58 mm.

Example 4 A mixture of 100 parts of nitrile-butadiene rubber latex with a solid content of 60% by weight, 50 parts of natural rubber latex with a solid content of 60% by weight, and 10 parts of zinc white (solid content of 60 parts by weight).
0% by weight, viscosity 2200 cps) and the following Example 1
A cloth surgical leg was obtained in the same manner as above. This surgical item had good water resistance and texture. The amount of the mixture applied to the base fabric was 427 mm.

The viscosity in each of the above examples is rotor No. 5.4r.
, p, m s Measured using a BH type viscometer.

patent applicant Nitto Electric Industry Co., Ltd. Representative Kamikata Sanbe

Claims (1)

[Claims] On one surface of a base fabric made of rayon and/or cotton yarn, nitrile-butadiene rubber latex with a solid content of 50 to 97% by weight, natural rubber latex with a solid content of 0 to 50% by weight, and 3. A mixture with a solid content concentration of 40 to 85 weight % containing ~50 weight % filler is coated at 8 to 7 oP/m (solid content), and a rubber adhesive layer is provided on this coated surface, Fabric surgical item 0 comprising a backside treatment agent layer provided on the back side of the base fabric.