JPH04357957A - Pouch film for ostomy - Google Patents

Abstract

PURPOSE:To improve resilience and low-noise characteristic. CONSTITUTION:Blended layers 2, 3 consisting of any one of low-density polyethylene, ethylene/vinyl acetate copolymer, ethylene/methyl acrylate copolymer, and ethylene/ethyl acrylate copolymer and a styrene/isoprene block copolymer are provided on both surfaces of a central layer 1 consisting of a polyvinylidene resin.

Description

[Detailed description of the invention]

0001

FIELD OF THE INVENTION The present invention relates to a film for use in an ostomy pouch, which is attached to an aperture formed on the surface of a human body to collect various exudates coming out from the human body through the aperture. .

0002

[Prior Art] In order to treat filth that is discharged from the body through holes created or formed on the surface of the human body due to various diseases, a skin adhesive that can be pasted around the holes in the human body is used. A common practice is to attach a pouch to the side opposite the skin-contacting side of the part and collect the discharge from the aperture in the pouch.

[0003] Since this ostomy pouch temporarily stores exudates, it must prevent exudates and their odor from leaking outside, be strong enough not to be torn by external pressure, and have high sealing strength. It must satisfy many requirements, such as being supple without causing any discomfort to the skin, allowing excreted waste to flow smoothly through the pouch, and not making noise while being worn.

Conventional ostomy pouches initially used low-density polyethylene or polyvinyl chloride films, but the former had poor odor resistance and unsatisfactory flexibility, and furthermore, the film deteriorated due to body movements during wearing. When the material is bent or scratched, it makes a lot of noise, and the latter is somewhat satisfactory in terms of flexibility and low noise, but its odor resistance is insufficient. Afterwards, improvements were made particularly in terms of odor resistance, and layers of low-density polyethylene, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, or ethylene ethyl acrylate copolymer were added on both sides of the polyvinylidene chloride resin layer. A stacked three-layer film has been developed and is currently in widespread use, but its flexibility and low noise properties are insufficient. Problems with ostomy pouches that need to be resolved include the impact on third parties when the patient returns to work, and the resulting mental pain for the user.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to obtain a pouch film for ostomy that has excellent flexibility and low noise properties.

[0006]

[Means for Solving the Problems] In order to achieve the above object, in the present invention, low density polyethylene, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer is coated on both sides of a layer made of polyvinylidene chloride resin. A blend layer of either one of the ethylene ethyl acrylate copolymer and a styrene/isoprene block copolymer is provided.

[0007] The amount of low density polyethylene, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, or ethylene ethyl acrylate copolymer in the blend layer is 85% by weight or less, and the amount of styrene is 10 to 40% by weight.
When the content of the styrene-isoprene block copolymer is 15% by weight or more, advantageous values for both flexibility and low noise can be obtained. As the styrene/isoprene block copolymer to be blended, a styrene/isoprene block copolymer, a styrene/isoprene/styrene block copolymer, or hydrogenated copolymers of these can be used.

[0008]

[Function] In the present invention, the blend layer provided on both sides of the layer made of polyvinylidene chloride resin is made of low density polyethylene, ethylene vinyl acetate copolymer, ethylene methyl by mixing styrene-isoprene block copolymer. The flexibility and low noise properties of the acrylate copolymer or the ethylene ethyl acrylate copolymer alone are improved, resulting in good values.

[0009]

[Example] Next, an example of the present invention will be described.

In FIG. 1, 1 is a center layer made of polyvinylidene chloride resin, and 2 and 3 are low-density polyethylene, ethylene vinyl acetate copolymer, and ethylene methyl acrylate copolymer laminated on both upper and lower surfaces of the center layer 1. A pouch film is formed with a three-layer structure, or a blend layer of an ethylene ethyl acrylate copolymer and a styrene/isoprene block copolymer.

FIG. 2 shows another embodiment, in which 1 is a central layer made of polyvinylidene chloride resin, 2 and 3 are low density polyethylene, ethylene vinyl acetate copolymer, and ethylene laminated on both upper and lower surfaces of the central layer 1. A blend layer of methyl acrylate copolymer or ethylene ethyl acrylate copolymer and styrene/isoprene block copolymer, which is the same as that in FIG. 1, but in this example, center layer 1 and blend layers 2 and 3. Adhesive layers 4 and 5 are inserted between the central layer 1 and
The adhesive strength between the blend layers 2 and 3 is increased.

Examples of various compositions will be described below.

Example 1 Low density polyethylene (density 0.915) was coated on both sides of a 9 μm thick central layer made of polyvinylidene chloride resin.
5% by weight and hydrogenated styrene/isoprene block copolymer (Kuraray Co., Ltd. "Septon 2003", Styrene 13
A 65 μm thick film was obtained by mixing 28 μm thick blend layers of 15 wt % (containing 15 wt %) using a T-die film forming coextruder.

Example 2 Low density polyethylene (density 0.915) was coated on both sides of a 9 μm thick central layer made of polyvinylidene chloride resin.
A mixture of 0% by weight and 30% by weight of a hydrogenated styrene/isoprene block copolymer ("Septon 2003" manufactured by Kuraray Co., Ltd.) and a blend layer of 28 μm thick was created in the same manner as in Example 1. thickness 65μm
I got a film of.

Example 3 Ethylene vinyl acetate copolymer (density 0.9
3.Containing 25% vinyl acetate) and 85% by weight hydrogenated styrene/isoprene block copolymer (manufactured by Kuraray Co., Ltd.)
Septon 2003) mixed with 15% by weight to a thickness of 28μ
A stack of m blend layers was prepared in the same manner as in Example 1 to obtain a film with a thickness of 65 μm.

Example 4 Ethylene vinyl acetate copolymer (density 0.9
3.Containing 25% vinyl acetate) 70% by weight and hydrogenated styrene/isoprene block copolymer (manufactured by Kuraray Co., Ltd.)
Septon 2003) mixed with 30% by weight to a thickness of 28μ
A stack of m blend layers was prepared in the same manner as in Example 1 to obtain a film with a thickness of 65 μm.

Example 5 Ethylene vinyl acetate copolymer (density 0.9
3.Containing 25% vinyl acetate) 40% by weight and hydrogenated styrene/isoprene block copolymer (manufactured by Kuraray Co., Ltd.)
Septon 2003) mixed with 60% by weight to a thickness of 28μ
A stack of m blend layers was prepared in the same manner as in Example 1 to obtain a film with a thickness of 65 μm.

Example 6 70% by weight of ethylene ethyl acrylate copolymer (25% by weight of ethyl acrylate) and hydrogenated styrene/isoprene block copolymer (Kuraray) were applied to both sides of a 9 μm thick central layer made of polyvinylidene chloride resin. ``Septon 2003'' (manufactured by the company) mixed with 30% by weight to a thickness of 28 μm.
A film having a thickness of 65 μm was obtained by stacking the blend layers of 1 and 2 in the same manner as in Example 1.

Example 7 70% by weight of ethylene methyl acrylate copolymer (25% by weight of methyl acrylate) and hydrogenated styrene/isoprene block copolymer (Kuraray) were applied to both sides of a 9 μm thick center layer made of polyvinylidene chloride resin. ``Septon 2003'' (manufactured by the company) mixed with 30% by weight to a thickness of 28 μm.
A film having a thickness of 65 μm was obtained by stacking the blend layers of 1 and 2 in the same manner as in Example 1.

Example 8 60% by weight of ethylene-vinyl acetate copolymer (10% by weight of vinyl acetate) and styrene-isoprene-styrene block copolymer (Asahi Kasei Co., Ltd. "Toughprene" manufactured by Kogyosha
) and 40% by weight were mixed and three blend layers each having a thickness of 28 μm were stacked using an ethylene vinyl acetate copolymer adhesive to obtain a film having a thickness of 75 μm.

Next, two comparative examples were prepared.

Comparative Example 1 A core layer made of polyvinylidene chloride resin with a thickness of 9 μm was laminated with layers of 28 μm thick made of low-density polyethylene (density 0.915) on both sides, respectively, in the same manner as in Example 1. A film with a thickness of 65 μm was obtained using the above method.

Comparative Example 2 Ethylene vinyl acetate copolymer (density 0.9
3. Contains 25% by weight of vinyl acetate) and has a thickness of 28 μm.
A film with a thickness of 65 μm was obtained by stacking the layers in the same manner as in Example 1.

The polyvinylidene chloride resin used in the above examples and comparative examples was prepared by adding dioctyl adipate as a plasticizer to 100 parts by weight of a vinylidene chloride resin reacted with a molar ratio of 80% vinyl chloride and 20% vinyl chloride. It is a blend of 8 parts by weight.

Tables 1 and 2 show the results of measuring the flexibility and low noise properties of the above-mentioned Examples and Comparative Examples. Flexibility is defined as 300% modulus (k) at a tensile speed of 10 cm/min.
g/cm2), and the low noise property was obtained by preparing two films, cutting a circle with a diameter of 20 mm in the center of one film, and heat-sealing it with the other film. x 180° after fixing one end of the 200mm bag and bringing the other end close to the fixed end.
The rotating motion is performed 30 times per minute, the sound generated is collected by a microphone, the frequency is converted, and the intensity for each frequency is expressed in decibels (dB).

[0026]

[Table 1]

[0027]

[Table 2]

As can be seen from this table, a styrene-isoprene block copolymer is added to the outer layer of low-density polyethylene, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, or ethylene ethyl acrylate copolymer. As a result, both the modulus and the generated noise are reduced, and flexibility and low noise properties are improved. It has been found that the blended styrene-isoprene block copolymer has almost no difference in modulus and noise generation depending on whether it is hydrogenated or not, but it has been found that the hydrogenated version has slightly better aging resistance.

[0029]

[Effects of the Invention] According to the present invention, the flexibility and low noise properties are significantly improved, and the conventional properties such as odor resistance, strength, and sealing properties are maintained, so that many demands for ostomy pouches are met. Can be widely satisfied.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of an embodiment of the invention.

FIG. 2 is a cross-sectional view of another embodiment of the invention.

[Explanation of symbols]

1. Central layer 2, 3 Blend layer 4, 5 Adhesive layer

Claims (1)

[Claims] [Claim 1] One of low-density polyethylene, ethylene vinyl acetate copolymer, ethylene methyl acrylate copolymer, and ethylene ethyl acrylate copolymer and styrene-isoprene on both sides of the central layer made of polyvinylidene chloride resin. An ostomy pouch film characterized by having a blend layer with a block copolymer.