JPH09117500A - Material for surgery - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prepare a covering cloth having both a liquid impermeability property and a liquid absorbing property at the same time and a good touch feeling for operation by integrally forming a multilayered film including a film of a ethylene-vinyl acetate copolymer and a film of a polyethylene and a spunbond nonwoven fabric. SOLUTION: This material for surgery having a liquid impermeabiltiy and without lowering liquid absorbing property with the lapse of time and also being safe and having good touch feeling is formed by integrally forming a multilayered film 2 having a thickness of 5-35μm consisting of a film of an ethylene-vinyl acetate copolymer and a film of a polyethylene and a spunbond nonwoven fabric 1 of 20-80g/m<2> by using an ethylene-vinyl acetate copolymer film as an adhering layer. The spunbond nonwoven fabric 1 is made of a polyamide resin e.g. nylon 6, nylon 66, nylon 12, or a monoolefinic type polymer of e.g. ethylene, ppropylene, butene, etc. The material may be of two or three layers.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surgical material, and more particularly, to a surgical material having both a liquid blocking property and a liquid absorbing property and a good texture, particularly a surgical covering cloth. is there.

[0002]

2. Description of the Related Art Conventionally, knits, woven fabrics, non-woven fabrics, plastic thin films and the like have been used for drapes and surgical clothes used during surgery. Generally, a covering cloth made of a woven or knitted fabric or a non-woven cloth has good air permeability and is comfortable, but when a large amount of body fluid or water adheres, it will penetrate into the inside. In other words, when used as a drape, there is a risk that it will be contaminated with its own blood and drugs during surgery, and even when used as surgical gown, the blood from the patient will be exposed to doctors, etc. There was a risk of infection due to the bacteria and viruses present in.

Therefore, in order to solve these problems, conventionally, a sheet in which a cloth-like material as a liquid absorbing layer and a film-like material as a liquid impermeable layer are integrated has been used. . That is, the cloth-like material as the liquid-absorbing layer absorbs and holds various liquids such as blood and lavage fluid generated during surgery, and the film-like material as the liquid-impermeable layer has these liquids at other sites. Was prevented from spreading to.

The cloth-like material used as the liquid absorbing layer is
Although woven fabrics, knitted fabrics, non-woven fabrics, etc. are used, the generation of lint has become a problem. That is, during operation, the fiber fragments generated from these may come loose and may contaminate the patient.
For example, the drape may make a window in the field for actually performing a surgical operation during surgery, but in such a case, the problem of lint is particularly great. In this sense, knitted fabrics and woven fabrics are not desirable, and the same problem occurs in the short fiber system even in the case of nonwoven fabrics. In this way, minimizing lint and the like is required in order to prevent contamination of the environment of the operating room and the surgical incision site by foreign material pieces.

In order to solve the problem of such fiber pieces,
One of the methods of manufacturing covering cloths that is currently performed is extrusion molding lamination (JP-A-4-202838, JP-A-05-14).
8759). For example, Japanese Patent Laid-Open No. 05-1
In Japanese Patent No. 48759, a nonwoven fabric is subjected to water repellent treatment and extrusion laminated. According to this, the surface fiber of the water repellent non-woven fabric is covered with the extruded liquid impermeable layer, and the non-woven fabric layer and the impermeable layer are bonded and integrated.

However, when the non-woven fabric is liquid-absorbent, if a liquid-impermeable material such as polyethylene is directly extruded onto the liquid-absorbing layer to integrate the two layers, pinholes are likely to be formed, and the liquid is hard to absorb. The role of the impermeable layer used as the impermeable layer could not be fulfilled, and there was a risk of exposure due to permeation of blood and the like. That is, since the surface of the cloth-like material which is the absorbing layer generally has irregularities, it is a very difficult technique to form a thin and uniform impermeable layer without pinholes thereon. As a measure for eliminating this pinhole, it is possible to increase the thickness of the liquid impermeable layer that is extrusion laminated. In fact, by increasing the thickness of the impermeable layer, it is possible to prevent the occurrence of pinholes, which was an initial problem.

However, if the thickness of the impermeable layer is increased, the thickness of the product itself is increased. As a result, the covering cloth used for medical purposes is hard and the texture is impaired. As described above, satisfactory results could not be obtained by conventional extrusion molding lamination. In order to solve the above-mentioned problems, a conventional method for producing a surgical medical covering cloth (Japanese Patent Application Laid-Open No. 55-37390 and Japanese Utility Model Laid-Open No. 62-25534), which is different from the above, is made of vinyl chloride, for example. Such a flexible film is used and is integrated with the cloth-like material which is the water absorbing layer through the adhesive layer. According to this method, the softness and texture of the cover cloth are good, but the desired water absorption decreases with time, and the water absorption layer of the cover cloth finally shows water repellency. . The reason for this is that since vinyl chloride film and adhesives are used, a large amount of plasticizers and additives used in these films bleed out sequentially into the water-absorbing layer, resulting in the water repellency of the plasticizers. Therefore, the desired water absorption is impaired. In addition, most of the additives used in these were positive when a hemolysis test was conducted, and there was room for improvement when used in medical products.

Further, as another method, there is a method in which the cloth-like material to be the water-absorbing layer itself has adhesiveness or melt film-forming property. For example, in the case of a non-woven fabric using a molten polymer, a low-melting-point polymer in which the yarn itself has a sheath core structure and is coordinated to the sheath side is melted (Japanese Utility Model Publication No. 2-22317, Japanese Patent Laid-Open No. 4-202838). A method of mixing two types of polymer fibers having different melting temperatures and melting only a yarn made of a polymer having a low melting point (JP-A-5-125647) is used. In these methods, the low melting point fibers constituting the web are melted by heat to adhere other film-like materials to form a covering cloth. However,
With these bonding methods, the bonding strength did not increase, and defects were likely to occur in the resulting molded product.

In the case of a composite non-woven fabric using two kinds of molten polymers, the production cost of the non-woven fabric itself is too high, and the price of the product is too high. As described above, the conventionally used surgical cloth has not yet been sufficiently satisfactory in terms of its performance and safety.

[0010]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide a surgical material having a liquid shielding property and a liquid absorption property which does not deteriorate with time and which is safe and has a good texture.

[0011]

Means for Solving the Problems As a result of intensive studies on the above points, the present inventors have found a surgical material which solves the above problems. That is, the present invention includes a film made of an ethylene vinyl acetate copolymer and a film made of a polyethylene polymer and having a thickness of 5 μm to 35 μm.
m multi-layer film and basis weight 20 g / m ^{2 to} 80 g / m ²
The spunbonded non-woven fabric is a surgical material in which a film made of the ethylene vinyl acetate polymer is integrated as an adhesive layer.

The present invention will be described in detail below. A cross-sectional view of the surgical material of the present invention is shown in FIGS. Fig. 1 (a) shows a multi-layer film layer and a spunbond nonwoven fabric layer.
Fig. 1 (b) shows a three-layered laminated sheet-like cover material having spunbonded nonwoven fabric layers on both sides of the multilayer film layer with a multilayer film layer interposed therebetween.

As is apparent from the figure, FIG.
(B) In both, the spunbonded nonwoven fabric (1), the multilayer film (2) including the film made of the ethylene vinyl acetate copolymer and the film made of the polyethylene polymer were integrated with the film made of the ethylene vinyl acetate polymer as an adhesive layer. It is a surgical cloth. The spunbonded nonwoven fabric used in the present invention is nylon 6, nylon 6
6, polyamide resins such as nylon 12, monoolefin polymers such as ethylene, propylene and butene, and polyolefin resins containing these copolymers as main components, polyester resins such as polyethylene terephthalate and polybutylene terephthalate, acrylic resins Etc., and a continuous cellulosic fiber nonwoven fabric obtained by the copper ammonia method is used. Further, the fibers constituting these spunbonded nonwoven fabrics may be a single component or a mixed component. That is, the above-mentioned resins may be used alone, and, for example, polyethylene /
Polypropylene, polyethylene or polypropylene /
It may be a composite fiber in which polyester or the like is mixed.

However, the surgical material used for the surgical cloth of the present invention is more preferably a spunbonded non-woven fabric made of polyamide fiber, particularly preferably nylon 6 fiber, from the viewpoint of water absorption and soft feeling. This is the preferred embodiment.
The spunbonded nonwoven fabric used in the present invention has a basis weight of 20.
a ^{g / m 2 ~80g / m 2} . If the spunbonded nonwoven fabric serving as the water-absorbent layer has a unit weight which is too thin, it will not exhibit sufficient water retention, while if it is too thick, the feel and softness of the surgical covering fabric will be reduced, which is not preferable.

The structure of the surgical material is shown in FIGS. 1 (a) and 1 (b).
As described above, it may have two layers or three layers. In the present invention, the opposite side nonwoven and touching the body, better 35g / m ² ~60g / m ² in the case of considering the water absorption. In a two-layer surgical cover, the non-woven fabric has a water absorbing layer on the side opposite to the one touching the body.

On the other hand, the non-woven fabric on the side that comes into contact with the body has basically a lower water absorption than the non-woven fabric on the outer side, for the purpose of mainly absorbing sweat etc. from the skin, and preferably, it is a ^{20g / m 2 ~40g / m 2} . The spunbond nonwoven fabric used in the present invention preferably has a fiber diameter of 0.5 to 6 denier, and more preferably 1.0 to 3 denier.

The spunbonded non-woven fabric used in the present invention may be any spun-bonded non-woven fabric produced by a known production method. In particular, a product obtained by laminating fibers drawn by air sucker immediately under spinning on a net upper layer is heat treated. The long-fiber nonwoven fabric described above is preferable. That is, if the nonwoven fabric is made of long-fiber non-woven fabric, the generation of lint can be prevented. For example, in a fabric made of short fibers or woven or knitted fabric, fiber fragments generated from the fibers may be unraveled during surgery, which may contaminate the patient.
In the case of a drape, a window for actually performing a surgical operation may be made on site during surgery, but in such a case, the problem of lint is particularly large. In this way, minimizing lint and the like is required in order to prevent contamination of the environment of the operating room and the surgical incision site by foreign material pieces.

As the surgical material of the present invention, it is more preferable to use a spunbonded nonwoven fabric having a water absorbing agent such as a known hydrophilic surfactant attached thereto, since the water absorbing performance can be further improved. A spunbonded nonwoven fabric using stretchable yarns or crimp yarns is more preferable because it can improve the feel and flexibility. The multilayer film used in the present invention has a thickness of 5 μm to 35 μm including a film made of an ethylene vinyl acetate copolymer and a film made of a polyethylene polymer.
m is a multilayer film. The multilayer film used in the present invention may have a melting point similar to that of the ethylene vinyl acetate copolymer, in addition to the film made of the ethylene vinyl acetate copolymer, for the purpose of improving the adhesiveness to the spunbond nonwoven fabric. It may contain a modified product of a polymer. For example, ionomer, amorphous polypropylene, amorphous polyethylene,
Examples of the film include a resin containing an aliphatic polyamide hot resin.

2 (a) and 2 (b) show the sectional structure of a basic multilayer film used in the present invention. Figure 2 (a) shows
It is a multi-layer film used for two-layer type surgical cloth,
FIG. 2B is a multilayer film used for a three-layer type surgical cloth. The multilayer film of FIG. 2 (a) is a film composed of a film layer made of a polyethylene polymer and a film layer made of an ethylene-vinyl acetate copolymer, while the multilayer film of FIG. A film layer comprising a polymer and a film layer comprising ethylene vinyl acetate copolymer on both sides. In addition, between the film layer made of ethylene vinyl acetate copolymer and the film layer made of polyethylene polymer, a modified product of polyethylene polymer or a modified product of ethylene vinyl acetate copolymer or other polymer is used for the adhesive property of each layer. Can be used to raise. In any case, the film layer made of the ethylene vinyl acetate copolymer is adhered to the spunbonded non-woven fabric when it becomes a surgical covering, and the film layer made of the polyethylene polymer is the outer layer. (However, the film cover made of polyethylene polymer comes to the central part in the surgical cover having a three-layer structure.) The multilayer film used in the present invention has a thickness of 5 μm to 35 μm.
m. If the thickness of the film is too thin, the adhesive strength will be weak, and pinholes are likely to occur when used as a surgical material product, which may reduce the reliability of the surgical material product. On the other hand, if the thickness of the multilayer film is too thick, the softness as a surgical material product decreases and it becomes difficult to use. In this sense, the thickness of the multilayer film used in the present invention is more preferably 15 μm.
２５25 μm.

The multilayer film used in the present invention can be manufactured by a known method. Listed below are the T-die-coextrusion method and the co-extrusion inflation method. In any case, a pinhole performance is good and an inexpensive film production method is desirable. The apparatus for integrating the spunbond nonwoven fabric and the multilayer film in the present invention is
A device capable of performing heating and pressurization, that is, a device of a thermal laminating method, in a general name, may be used. For example, as an adhesive roll for heat lamination, metal roll / metal roll, metal roll / rubber roll, metal roll /
Examples include heat rolls such as paper rolls and metal rolls / felt rolls. Alternatively, a so-called felt calendar method, which is a lamination of rolls / fabric or the like, may be used. What is important here is that the occurrence of pinholes is eliminated and the production speed is high, and in view of these, laminating with a metal / rubber roll and laminating with a felt calender are better modes.

The surgical material of the present invention is a laminated sheet obtained by these methods, which is a flexible sheet having good liquid absorbency and water stopping property, and is therefore a drape or surgical gown used during surgery. It is suitable as a hat, a mask, or various medical sheets.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail with reference to Examples. The physical properties were evaluated as follows. (1) Acceleration test with time The sample was left for 4 weeks in an atmosphere of a temperature of 60 ° C. and a humidity of 75%, and the test was performed after a lapse of time. (2) Adhesive Strength The degree of integration of the spunbond nonwoven fabric and the multilayer film was evaluated by adhesive strength. The evaluation method is JIS-L-1.
086.

That is, a sample having a length of 15 cm and a width of 5 cm was sampled at 5 points each for vertical and horizontal, and cloth tape No. manufactured by Nichiban Co., Ltd. was placed on the film side. 102 (width 50 mm) is attached, and the distance between the non-woven fabric and the film is 5 cm from the side in the length direction of the sample piece.
Peel accurately, attach to a tensile tester with a gripping interval of 5 cm, and peel length 5 cm at a pulling speed of 100 mm / min.
The mold was peeled off, and the maximum value of peel strength and the minimum value of peel strength were taken from the chart, and an average value of 6 pieces was calculated. (3) Water pressure resistance The liquid shielding property was evaluated by the water pressure resistance measured by the water resistance test method (hydrostatic pressure method) of JIS-L-1092. (4) Water absorption rate The water absorption rate was evaluated by the water absorption rate test A method (dropping method) of JIS-1-1096. (5) Bending flexibility KES (Kawabata's Evaluation Syst)
em) Method Bending characteristics were evaluated. (6) Hand feeling The sample was touched and evaluated. The evaluation is indicated by ◯ △ ×, the soft one is ◯, the hard one is ×, and the middle is Δ. (7) Pinholes 2 ml of IPA (2-propanol) colored with red ink was applied to the film side of the sample in an area of 20 × 20 cm, and wiped off to observe and confirm the presence or absence of pinholes in the film.

[0024]

Example 1 A spunbonded nonwoven fabric having a basis weight of 50 g / m ^{2 made} of nylon 6 fiber was used. To this non-woven fabric, Nopco Wet SN20-T manufactured by San Nopco Ltd.
Was diluted with water to be 1 g / m ² and impregnated with it, then dried, and subjected to water absorption processing. The multilayer film is ethylene vinyl acetate copolymer 14 μm, special low density polyethylene 8 μm, mixture of low density polyethylene polymer and polypropylene polymer 3 μm, total thickness 25
μm was used.

This multi-layered film was superposed on the above water-absorbent non-woven fabric so that the ethylene-vinyl acetate copolymer was on the non-woven fabric side, and was passed between the metal roll and the rubber roll in the direction in which the multi-layer film was in contact with the metal roll. Integrated. The integration condition is that the surface temperature of the metal roll is 11
At 0 ° C, the rubber rolls have a rubber hardness defined by JIS-K-6301 of 75 degrees, and both rolls have a pressure of 5 kg / cm.
^The contact speed was ² , and the rotation speed of the roll was 4 m / min.

The obtained laminated sheet-like material is suitable as a surgical covering cloth in which a spunbonded non-woven fabric and a multilayer film are integrated and which has both a liquid blocking property and a liquid absorbing property and a good texture. Furthermore, when a time-dependent acceleration test was conducted,
The liquid blocking property, liquid absorbing property, and texture did not change. These results are summarized in Table 1.

[0027]

Example 2 As the spunbonded non-woven fabric, the same non-woven fabric as in Example 1 was used. Multilayer film
The composition is ethylene vinyl acetate copolymer 11 μm, special low density polyethylene 6 μm, mixture of low density polyethylene polymer and polypropylene polymer 3 μm,
The one having a total thickness of 20 μm was used.

This multi-layered film was laminated on the spunbonded non-woven fabric that had been water-absorbed so that the ethylene vinyl acetate copolymer was on the non-woven fabric side, and the multi-layered film was placed between the metal roll and the rubber roll in the direction of contact with the metal roll. Integrated through. The integration conditions were the same as in Example 1 except that the surface temperature of the metal roll was 115 ° C. As a result, a surgical covering cloth having both a liquid blocking property and a liquid absorbing property and a good texture was obtained. Furthermore, when a time-dependent acceleration test was conducted, the liquid blocking property, liquid absorbing property, and texture did not change. These results are summarized in Table 1.

[0029]

Example 3 A spunbonded non-woven fabric having a basis weight of 30 g / m ^{2 made} of nylon 6 fibers was subjected to water absorption treatment in the same manner as in Example 1 before use. As the multilayer film, the same multilayer film as in Example 1 was used and integrated in the same manner as in Example 1. The obtained laminated sheet-like material was excellent as a surgical covering cloth having both a liquid blocking property and a liquid absorbing property and a good texture. Furthermore, when a time-dependent acceleration test was conducted, the liquid blocking property, liquid absorbing property, and texture did not change. These results are summarized in Table 1.

[0030]

[Example 4] As the spunbonded nonwoven fabric, the same nonwoven fabric as in Example 1 which was subjected to water absorption processing was used. Multilayer film
A multilayer film having an overall thickness of 20 μm and having a constitution of ethylene-vinyl acetate copolymer 15 μm and low-density polyethylene polymer 5 μm was used. This multi-layered film was laminated on the above-mentioned water-absorbent non-woven fabric so that the ethylene-vinyl acetate copolymer was on the non-woven fabric side, and the multi-layered film was oriented so that the multi-layer film was in contact with the metal roll.
It was passed between a metal roll and a rubber roll under the same conditions.

The obtained laminated sheet material has both a liquid blocking property and a liquid absorbing property and has a good texture.
When the time-dependent acceleration test was conducted, the liquid blocking property, liquid absorbing property, and texture did not change. These results are summarized in Table 1.

[0032]

[Example 5] A spunbonded non-woven fabric comprising a water-absorbent non-woven fabric similar to that of Example 1 and a nylon 6 fiber water-absorbent processed in the same manner as in Example 1 has a basis weight of 20 g / m 2.
² and were used. The multilayer film is made of ethylene vinyl acetate copolymer 15 μm, polyethylene polymer 5
μm, ethylene vinyl acetate copolymer having a thickness of 30 μm and 10 μm.

In the multilayer film, 15 μm of the ethylene-vinyl acetate copolymer is on the side of the nonwoven fabric of 50 g / m ² , and 10 μm of the ethylene-vinyl acetate copolymer is on the side of the nonwoven fabric of 20 g / m 2.
^The non-woven fabric, the film and the non-woven fabric were superposed in this order on the ^second side and passed between the metal rolls. At this time, both surface temperatures of the metal rolls were 110 ° C., both rolls were in contact with each other at a pressure of 10 kg / cm ² , and the rotation speed of the rolls was 2 m / min. As a result, the non-woven fabric and the film were integrated, and a surgical covering fabric having both a liquid blocking property and a liquid absorbing property and a good texture was obtained. further,
When the time-dependent acceleration test was conducted, the liquid blocking property, liquid absorbing property, and texture did not change. These results are summarized in Table 1.

[0034]

Comparative Example 1 The performance of a water-absorbent spunbonded nonwoven fabric similar to that of Example 1 was measured. The spunbonded non-woven fabric had good liquid absorption and texture, but did not have liquid shielding properties. These results are summarized in Table 1.

[0035]

Comparative Example 2 The same water-absorbing spunbonded nonwoven fabric as in Example 1 was extruded and laminated with a polyethylene resin at a temperature of 330 ° C. and a nip pressure of 2 kg / cm ² to a thickness of 30 μm by a known method. The sample of the obtained spunbonded nonwoven fabric had good liquid absorbency and texture, but JI
Water pressure resistance measured by SL-1092 is 560mmH _{2 on} average
A value as low as O causes liquid leakage, some of which is 170 mmH
There were even test pieces that leaked at ₂ O.

After confirming the presence or absence of a pinhole,
Ten pinholes were found at 20 × 20 cm. This is because the thread on the surface of the non-woven fabric broke through the polyethylene resin extruded on the surface and liquid leakage occurred from here. These results are summarized in Table 1.

[0037]

Comparative Example 3 A water-absorbent spunbonded nonwoven fabric similar to that of Example 1 was dry laminated with a flexible vinyl chloride film having a thickness of 20 μm through a vinyl chloride adhesive layer by a known method. . As a result, the spunbonded non-woven fabric and the film were integrated, and a surgical covering fabric having both a liquid blocking property and a liquid absorbing property and a good texture was obtained. However, when the time-lapse acceleration test was performed, the liquid blocking property did not change, but the liquid absorbing property decreased. These results are summarized in Table 1.

[0038]

[Comparative Example 4] A spunbonded non-woven fabric having a basis weight of 100 g / m ^{2 made} of nylon 6 fibers was subjected to water absorption processing in the same manner as in Example 1 and used. The film used was the same multilayer film as in Example 1. The spunbonded nonwoven fabric and the multilayer film were integrated in the same manner as in Example 1.
The integrated laminated sheet was good in liquid blocking property and liquid absorbing property, but the texture and softness were deteriorated because the nonwoven fabric was thick. These results are summarized in Table 1.

[0039]

[Comparative Example 5] As the spunbonded nonwoven fabric, the same water-absorbent nonwoven fabric as in Example 1 was used, and the film had a thickness of 20.
A polyethylene monolayer film of μm was used. This film was overlaid on the water-absorptive nonwoven fabric and passed between a metal roll and a rubber roll in a direction in which the film was in contact with the metal roll.

At this time, the surface temperature of the metal roll is 115
℃, the rubber roll has a rubber hardness of 75 degrees as specified in JIS-K-6301, and both rolls have a pressure of 5 kg / cm ²
And the rotation speed of the roll was 4 m / min. However, the film and the non-woven fabric did not adhere. These results are summarized in Table 1.

[0041]

Comparative Example 6 As the spunbonded non-woven fabric, the same non-woven fabric as in Example 1 that was subjected to water absorption processing was used. Multilayer film
An ethylene vinyl acetate copolymer 20 μm, a special low density polyethylene 20 μm, a mixture of a low density polyethylene polymer and a polypropylene polymer 10 μm, having a total thickness of 50 μm, were used and integrated in the same manner as in Example 1. The integrated laminated sheet was good in liquid-blocking property and liquid-absorbing property, but the film was thick, and thus the texture and softness were deteriorated. These results are shown in Table 1.
Summarized in

[0042]

[Table 1]

[0043]

EFFECTS OF THE INVENTION The surgical material of the present invention has both liquid blocking property and liquid absorbing property, and further, the liquid absorbing property does not decrease with time.
It is safe and has a good texture, and is particularly suitable as a surgical covering cloth.

[Brief description of the drawings]

FIG. 1 is a sectional view schematically showing a surgical material of the present invention. Fig. 1 (a) shows a multi-layer film layer and a spunbond nonwoven fabric layer.
Layered surgical cover, Figure 1 (b) shows a three-layered surgical cover with spunbonded non-woven fabric layers on both sides of the multilayer film layer.

FIG. 2 is a sectional view schematically showing a multilayer film used in the present invention. FIG. 2A shows a multilayer film used for a two-layer type surgical covering cloth, and FIG. 2B shows a multilayer film used for a three-layer type surgical covering cloth.

[Explanation of symbols]

 1. Spunbond nonwoven fabric 2. Multi-layer film 3. Spunbond nonwoven fabric 4. Multi-layer film 5. Spunbond nonwoven fabric 6. Film layer made of ethylene vinyl acetate polymer 7. 7. Film layer made of polyethylene polymer Film layer made of ethylene vinyl acetate polymer 9. Film layer made of polyethylene polymer 10. Film layer made of ethylene vinyl acetate polymer

Claims (1)

[Claims] 1. A multilayer film having a thickness of 5 μm to 35 μm, which includes a film made of an ethylene vinyl acetate copolymer and a film made of a polyethylene polymer, and a basis weight 2.
Surgical materials to the 0g / m ² ~80g / m ² spunbond nonwoven fabric is integrated with the film made of the ethylene vinyl acetate polymer as an adhesive layer.