JP2013014089A - Laminated cloth and medical supplies using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a laminated cloth excellent in washing durability, moist heat resistance, alkali resistance, etc., and various medical supplies using the laminated cloth.SOLUTION: The laminated cloth obtained by laminating a fibrous cloth, a curable adhesive, and a polyamide elastomer film in turn has a hydraulic pressure resistance based on a JIS L1092 6.1B method (a high hydraulic pressure method) after a process in which it is tumble-dried for 30 min at 60°C after washing based on a JIS L0217 103 method is repeated 10 times, autoclave-treated for 80 min at 135°C, and tumble-dried for 30 min at 60°C is repeated 10 cycles of 100-500 kPa by making the same serve as 1 cycle and a moisture permeability based on a JIS L1099 7.2.1B-1 method (a potassium acetate method) of 6,000-20,000 g/m. 24hrs.

Description

  The present invention relates to a laminated fabric having moisture permeability and waterproof properties suitable for the food / pharmaceutical manufacturing field, the medical field, and the like, and a medical article using the same.

Moisture-permeable waterproof fabric that has both moisture permeability and waterproofness has the function of releasing water vapor from sweat from the body to the outside of clothes and the function of preventing rain from entering the clothes. It is suitable for sports clothes.

  Particularly in application fields that require a high level of waterproof performance, a moisture-permeable waterproof fabric with a laminated resin layer is suitable. As a typical example, a resin layer having moisture-permeable waterproof performance made of polyurethane or polyester is used as a fiber. What coated or laminated on the single side | surface of the fabric is known (for example, refer patent documents 1-3).

Japanese Patent Laid-Open No. 5-78984 JP 2003-20574 A JP 2007-296797 A

  Moisture permeable and waterproof fabrics have an excellent function, and in recent years, there have been attempts to apply them to fields other than winter clothing and sports clothing.

  For example, uniforms used in the food / pharmaceutical manufacturing field are generally autoclaved after use for the purpose of sterilization in addition to normal washing. Autoclave treatment refers to wet heat treatment using a high-pressure steam sterilizer. Although there are some differences depending on the use, shape, and dirt condition of the uniform, it is usually 135 ° C for 20 minutes at 121 ° C (2 atm). Conditions such as the bottom 8 minutes are adopted.

  On the other hand, medical supplies such as lab coats, surgical gowns, gowns, and drapes are generally autoclaved after use. However, since dirt that is harder to remove than usual, such as blood, body fluids, and medicines, is attached to medical supplies, industrial washing using an alkaline bath at a temperature of 60 to 80 ° C. is adopted as washing prior to autoclaving. It is common.

However, in food / pharmaceutical manufacturing and medical settings, it is normal not to undress uniforms during work from the viewpoint of preventing the attachment and spread of bacteria and viruses. For this reason, once these uniforms are worn, the heat and stuffiness that accompanies body movements and sweating cannot be released to the outside by undressing, resulting in an improvement in the clothing environment during work. There was a problem that it was difficult.
Therefore, there is an attempt to apply a moisture permeable waterproof fabric in order to obtain the desired clothing comfort.

  Since the moisture-permeable and waterproof fabric is excellent in moisture permeability, it is possible to efficiently discharge hot air and stuffiness accumulated in the clothes, and since it is excellent in waterproofness, it is possible to efficiently prevent the entry of contaminants.

  However, in the case of a conventional moisture-permeable and waterproof fabric, the resin layer is inferior in heat resistance, hydrolysis resistance, and the like, and thus there is a problem that the resin layer gradually deteriorates from the fiber fabric when washing and autoclaving are repeated. That is, the fabric has a problem that, as the use frequency increases, washing durability, heat and moisture resistance, alkali resistance, and the like are reduced, and moisture permeability and waterproofness cannot be maintained. In particular, in the case of fabrics used in the medical field, this tendency becomes remarkable because industrial laundry is performed under severe conditions after use.

  Thus, there have been several attempts to improve the heat resistance and hydrolysis resistance of the resin layer, but satisfactory results have not yet been obtained.

  In this way, as a thing applied to the field of food / pharmaceutical production and medical care, those that exhibit sufficient washing durability, moisture heat resistance and alkali resistance, etc., and as a result can continue to maintain moisture permeability and waterproofness, The actual situation is not yet obtained.

  This invention eliminates said fault and makes it a subject to provide the laminated fabric which is excellent in washing durability, wet heat resistance, alkali resistance, etc., and various medical supplies using the same.

  The present invention solves the above problems and has the following configuration.

(1) A fabric in which a fiber fabric, a curable adhesive, and a polyamide-based elastomer film are laminated in this order, and after 10 times of washing based on the JIS L0217 103 method, tumble drying at 60 ° C. for 30 minutes and 135 ° C. The water pressure resistance based on JIS L1092 6.1B method (high water pressure method) after 100 cycles of autoclave treatment at 80 ° C. and tumble drying at 60 ° C. for 30 minutes as one cycle is 100 to 500 kPa Also, a laminated fabric characterized in that the moisture permeability based on JIS L1099 7.2.1B-1 method (potassium acetate method) is 6000-20000 g / m ² · 24 hrs.
(2) A medical article using the laminated fabric according to (1).
(3) A fabric obtained by further laminating a curable adhesive and a lining in this order on the polyamide-based elastomer film of the laminated fabric according to (1), which is autoclaved at 135 ° C. for 80 minutes after industrial washing. Further, the process of tumble drying at 60 ° C. for 30 minutes is defined as one cycle, and after repeating this 10 cycles, the water pressure resistance based on the JIS L1092 6.1B method (high water pressure method) is 100 to 500 kPa, and JIS L1099. 2.1 A laminated fabric characterized in that the moisture permeability based on the method B-1 (potassium acetate method) is 4000 to 15000 g / m ² · 24 hrs.
(4) The polyamide-based elastomer film is composed of a polyether block amide copolymer having a hard segment mainly composed of nylon 12 and a soft segment mainly composed of polyalkylene glycol ( The laminated fabric according to 1) or (3).
(5) A medical article comprising the laminated fabric according to (3) or (4).

  The laminated fabric of the present invention is excellent in various durability because the membrane is not deteriorated or hardly peeled off from the fiber fabric even after repeated washing and autoclaving. For this reason, the laminated fabric of the present invention can maintain good moisture permeability and waterproofness even if the use frequency increases. Thus, for example, when applied to a uniform used in food / pharmaceutical manufacturing, medical practice, etc., excellent clothing comfort can be obtained. In particular, in the case of medical supplies, since dirt is removed by industrial washing after use, a larger load is applied compared to normal washing. However, the laminated fabric of the present invention can sufficiently withstand industrial washing. Can be preferably applied.

  Hereinafter, the present invention will be described in detail.

  The laminated fabric of the present invention is obtained by laminating a fiber fabric, a curable adhesive, and a polyamide-based elastomer film in this order.

  In the present invention, a conventionally known woven fabric, knitted fabric, nonwoven fabric, or the like can be applied to the fiber fabric used as the base fabric. In this case, examples of the fibers include polyamide synthetic fibers such as nylon 6 and nylon 66, polyester synthetic fibers such as polyethylene terephthalate and polybutylene terephthalate, polyacrylonitrile synthetic fibers, polyvinyl alcohol synthetic fibers, and triacetate. Mixed fibers such as semi-synthetic fiber, nylon 6 / cotton, polyethylene terephthalate / cotton can be used. In the present invention, polyester synthetic fibers such as polyethylene terephthalate are mainly used mainly from the viewpoints of moisture and heat resistance and production cost.

  In the present invention, it is preferable to use a fiber fabric that has been subjected to a water repellent treatment. As the water repellent used for the water repellent treatment, known ones such as a paraffin water repellent, a polysiloxane water repellent, a fluorine water repellent can be used. As a water repellent treatment method, a known method such as a spray method, a padding method, or a coating method can be adopted. When particularly good water repellency is desired, a fiber fabric is padded with an aqueous dispersion containing 2 to 10% by mass of a fluorinated water repellent at a pickup rate of 30 to 100% and dried at 80 to 130 ° C. Then, heat treatment may be performed at 150 to 180 ° C. for 20 seconds to 2 minutes.

  In addition, any polyamide-based elastomer film in the present invention can be used as long as it is made of a polyamide-based composition and exhibits the behavior of an elastomer as a film. Specifically, known materials such as nylon 6 film, nylon 66 film, nylon 610 film, nylon 11 film, nylon 12 film and nylon 6T film can be used, and in particular, a polyamide-based composition comprising a hard segment and a soft segment. Since the film comprised from these tends to show the behavior as an elastomer, it is suitable.

  A polyether block amide copolymer is suitable as the polyamide-based composition having a hard segment and a soft segment. The copolymer has a polyamide block and a polyether block, with the former corresponding to the hard segment and the latter corresponding to the soft segment.

In the copolymer, as the polyamide block, nylon 6, nylon 11, nylon 12, nylon 6,12, nylon 11,12 and the like are preferable, and these include butadiene, caprolactam, aminoundecanoic acid, lauryl lactam and the like. It is formed.
On the other hand, the polyether block is preferably composed mainly of polyalkylene glycol formed from ethylene glycol, propylene glycol, tetramethylene glycol or the like.

  In the present invention, it is particularly preferable that the polyamide block is composed mainly of nylon 12, which can improve the heat and humidity resistance of the film and the impact resistance at low temperature. In addition, such a polyamide block is advantageous in that it can easily introduce a polyether block, thereby reducing the cost of membrane production. Nylon 12 is generally formed from butadiene as the main raw material.

  In addition, if the polyamide block is composed of nylon 6 as the main component, the flexibility and impact resistance of the membrane can be improved, and if nylon 11 is also the main component, plant-derived raw materials can be used. Is advantageous.

  When using a polyether block amide copolymer, the content of the soft segment is preferably 10 to 60% by mass, and more preferably 15 to 45% by mass. When the content of the soft segment is less than 10% by mass, the moisture permeability of the film tends to be reduced. On the other hand, when the content exceeds 60% by mass, the water-swelling resistance tends to be reduced together with the moisture and heat resistance of the film. It is not preferable. In addition, when the water-swelling resistance of the film is lowered, the shape of the laminated fabric is likely to change due to sweating during washing or wearing.

  The polyamide-based elastomer film may contain a third component other than the polyamide-based composition as long as the effects of the present invention are not impaired. In this case, the third component is preferably one having an affinity for the polyamide-based composition and contributing to an improvement in the flexibility of the film. For example, a plasticizer such as butylbenzenesulfamide is suitable in addition to a polyester resin having a graft group and a polyolefin resin having a predetermined functional group. The content of the third component is preferably 20% by mass or less.

  In addition, if necessary, a lubricant such as silicon dioxide, a pigment, a heat stabilizer, an antioxidant, a weathering agent, a flame retardant, and the like may be appropriately blended in the film.

  In order to obtain a polyamide-based elastomer film, a known production method may be applied. As an example, various polyamide-based compositions that are raw materials for the film are melt-mixed in a single screw extruder or a twin screw extruder, then extruded into a sheet using a T-die, and further, a sequential biaxial stretching method, If the film is stretched to a predetermined thickness according to the simultaneous biaxial stretching method or the like, the target film can be obtained.

  Moreover, as thickness of a film | membrane, 5-30 micrometers is preferable and 7-20 micrometers is more preferable. If the thickness is less than 5 μm, the waterproofness of the membrane is lowered and the contaminants are easily transmitted, and the work efficiency at the manufacturing site and medical site may be impaired. On the other hand, if it exceeds 30 μm, the waterproof property of the laminated fabric is greatly improved, but the moisture permeability is likely to be greatly reduced, and the texture of the laminated fabric tends to be lowered, which is not preferable.

  Further, the physical properties of the polyamide-based elastomer film will be described. The 100% modulus is preferably 3 to 30 MPa, and more preferably 5 to 20 MPa. Further, the breaking strength is preferably 10 to 100 MPa, and more preferably 20 to 80 MPa. Further, the breaking elongation is preferably 300 to 1000%, more preferably 400 to 700%. By satisfying these physical properties, the membrane can provide a fabric that can sufficiently withstand the laminated fabric even when the autoclave treatment at 135 ° C. described later is repeated.

  In the laminated fabric of the present invention, the fiber fabric and the elastomer film are bonded with a curable adhesive.

  Examples of the curable adhesive include so-called crosslinkable polyurethane-based resins, polyester-based resins, polyamide-based resins, polyethylene vinyl acetate-based resins having reactive groups such as hydroxyl groups, isocyanate groups, amino groups, and carboxyl groups. However, those that are self-cross-linked, or cross-linked with a crosslinking agent such as an isocyanate type or an epoxy type to become a curable type are used. Of these, polyurethane resins are preferred because of their high flexibility. At this time, if the polyurethane resin is of a non-swelling type, the washing durability of the laminated fabric is further increased, and if the polyurethane resin is of a polycarbonate type, the moisture resistance of the laminated fabric is further improved.

  Although it does not specifically limit as a shape of a curable adhesive, From a practical viewpoint, it is preferable that it is a solution type or a hot-melt type. When using a solution-type adhesive, preferably one having a viscosity of 500 to 5000 mPa · s at 25 ° C. is used. For example, a gravure roll or a comma coater is used to apply an adhesive on an elastomer film or fiber fabric. Apply. Thereafter, the fiber fabric and the elastomer film are pressure-bonded using, for example, a laminating machine.

  On the other hand, when using a hot-melt adhesive, it is first melted in consideration of the melting point of the adhesive and the viscosity at the time of melting. In this case, it is practically preferable to melt the adhesive in a temperature range of about 80 to 200 ° C. Then, the melted adhesive is applied onto the elastomer film or the fiber fabric, and thereafter, the fiber fabric and the elastomer film are pressure-bonded using, for example, a laminating machine while cooling as necessary.

  In the present invention, the adhesive does not necessarily have to be applied to the entire surface of the elastomer film or fiber fabric, and is partially applied in consideration of the moisture permeability, texture and durability of the laminated fabric. Also good. In this case, a pattern such as a dot, a line, a checkered pattern, or a turtle shell pattern is drawn. However, it is preferable to apply the pattern because the adhesive can be uniformly disposed on the entire surface of the membrane or the fiber fabric.

  When the adhesive is partially applied, the area occupied by the adhesive is preferably about 20 to 90%, more preferably 40 to 80%, based on the total area of the surface of the membrane or fiber fabric (application surface). If the occupied area is less than 20%, it is difficult to obtain a durable laminated fabric even if the thickness of the adhesive is increased. On the other hand, if it exceeds 90%, as a result of increasing the adhesive force, the durability of the laminated fabric is increased, but moisture permeability and texture tend to be lowered, which is not preferable.

  The thickness of the adhesive is preferably about 10 to 150 [mu] m, more preferably 20 to 120 [mu] m, regardless of whether the coating is applied on the entire surface or partially. When the thickness is less than 10 μm, it is difficult to obtain a durable laminated fabric even if the area occupied by the adhesive is increased. On the other hand, when the thickness exceeds 150 μm, no further improvement in adhesive strength tends to be expected. Absent.

  In the laminated fabric of the present invention, the fiber fabric, the curable adhesive, and the polyamide-based elastomer membrane are laminated in this order, and this configuration makes it difficult for the membrane to deteriorate even after repeated washing and autoclave treatment. Since the film is difficult to peel from the fiber fabric, good washing durability and heat-and-moisture resistance are exhibited, and moisture permeability and waterproofness are maintained. In other words, in the present invention, a predetermined effect is achieved due to the unique characteristics of each member constituting the laminated fabric.

In the present invention, as an index of such characteristics, the moisture permeability and waterproofness after repeating washing and autoclave treatment a predetermined number of times needs to satisfy a predetermined range. Specifically, the laminated fabric of the present invention was repeatedly tumble-dried at 60 ° C. for 30 minutes, and then washed at 135 ° C. after 10 times of washing based on JIS L0217 103 method (dehydration and rinsing are in accordance with L0217 Attached Table 1). The process of autoclaving for 80 minutes and tumble drying at 60 ° C. for 30 minutes as one cycle is repeated 10 cycles, and then the water pressure resistance is in the range of 100 to 500 kPa based on the JIS L1092 6.1B method (high water pressure method). The moisture permeability based on JIS L1099 7.2.1B-1 method (potassium acetate method) is also satisfied within the range of 6000 to 20000 g / m ² · 24 hrs.

  As a result of satisfying such properties, the laminated fabric of the present invention can be preferably applied to fields where application of conventional moisture-permeable and waterproof fabrics has been difficult. The laminated fabric of the present invention is suitable for a field where appropriate durability is required, for example, in the field of food / pharmaceutical manufacturing and medical treatment, and specifically, it is preferably used for uniforms and various materials used in the field. Especially, it is suitable for medical supplies that require high durability, and examples of such medical supplies include lab coats, surgical garments, patient garments, examination garments, surgical sheets, gowns, drapes, supporters, and sterilization bags.

  In addition to the above structure, the laminated fabric of the present invention has a high durability enough to withstand repeated industrial washing as a result of the membrane being protected by the backing when a backing is further laminated on the polyamide-based elastomer membrane. Achieved. Thereby, it can be applied more preferably to medical supplies.

Specifically, after industrial washing, autoclaving at 135 ° C. for 80 minutes and tumble drying at 60 ° C. for 30 minutes as one cycle, this was repeated 10 cycles, and then JIS L1092 6.1B method (high The water pressure resistance based on the water pressure method) satisfies the range of 100 to 500 kPa, and the moisture permeability based on the JIS L1099 7.2.1B-1 method (potassium acetate method) is also in the range of 4000 to 15000 g / m ² · 24 hrs. Satisfaction is preferable.

  Industrial laundry is a laundry means that uses a hot alkaline bath. Specifically, using an industrial washing machine (“LM-W type” manufactured by Suga Test Instruments Co., Ltd.), “Pure-Soap” manufactured by Fudo Chemical Co., Ltd. was 1 g / L and caustic soda was 0.8 g / L. Wash with PH10 washing liquid. The bath ratio is 1:40, which is first washed with hot water at 73 ° C. for 200 minutes, then rinsed at 40 ° C. for 30 minutes, dehydrated for 30 minutes, and tumble dried at 60 ° C. for 30 minutes. In the present invention, it is preferable that the process of combining a series of industrial washing with autoclave treatment and tumble drying under a predetermined condition is one cycle, and the moisture permeability and waterproofness after repeating this cycle satisfies a predetermined range.

  You may use the thing similar to the said fiber fabric for the lining in this invention. In particular, from the viewpoint of cost, moist heat resistance, waterproofness, light weight, and seam tape adhesion, it is preferable to use a synthetic fiber yarn having a total fineness of 15 to 78 dtex, more preferably 15 to 44 dtex. Good. The seam tape is an adhesive tape that is bonded to the seam of a sewn product for the purpose of waterproofing.

  In addition, what is necessary is just to laminate | stack via an above-described curable adhesive, in order to laminate | stack a liner on a film | membrane.

  Next, the present invention will be specifically described with reference to examples. In addition, the process and physical property in an Example and a comparative example were implemented and measured according to the following means.

1. Autoclave treatment was performed using a high pressure steam sterilizer “HV50 type” manufactured by Hirayama Seisakusho. The condition was 80 minutes at 135 ° C., and a process in which washing under predetermined conditions was combined before the autoclave treatment and tumble drying was combined as one cycle.

2. The breaking strength and elongation of the film were measured using “Autograph AGS-5kNG type” manufactured by Shimadzu Corporation at a tensile rate of 200 mm / min.

3. Water pressure resistance of laminated fabric (waterproof test)
For the fiber fabric, the curable adhesive, and the polyamide-based elastomer film sequentially laminated, the measurement was performed with the fiber fabric facing upward (the elastomer film facing downward). This is because when the membrane is directed downward, water easily enters between the fiber fabric and the elastomer membrane, and as a result, the membrane is easily ruptured. About the thing further provided with the lining, the lining was measured facing down.

4). Peel strength The peel strength in the warp direction was measured based on JIS L1089 6.10.

Example 1
A plain structure woven fabric having a warp density of 110 yarns / 2.54 cm and a weft density of 90 yarns / 2.54 cm was woven using polyethylene terephthalate multifilament yarn 83dtex72f for both the warp and the weft.

  After weaving, the fabric was scoured at 80 ° C. for 20 minutes using 1 g / L of a scouring agent (“Sunmol FL” manufactured by Nikka Chemical Co., Ltd.), and disperse dye (“Dianix Blue” manufactured by Dystar Japan Co., Ltd.). The fabric was dyed at 130 ° C. for 30 minutes in a dyebath containing 0.5% omf. Subsequently, after final setting at 170 ° C. for 1 minute, a commercially available fluorine-based water repellent emulsion (“Asahi Guard AG-E061” manufactured by Asahi Glass Co., Ltd., solid content 20% by mass) was used. An aqueous dispersion was prepared, and the aqueous dispersion was applied to the woven fabric in accordance with the padding method at a pickup rate of 40%. After the application, the fiber fabric was obtained by drying at 120 ° C. for 2 minutes, followed by heat treatment at 170 ° C. for 40 seconds.

  Next, a polyether block amide copolymer (“Pevax MV3000” and “Pevax MV1041” manufactured by Arkema Corporation) and a weather resistance improver (“MM33SU01” manufactured by Arkema Corporation) were prepared. The two types of polyether block amide copolymers include a polyamide block mainly composed of nylon 12 and a polyether block mainly composed of polyethylene glycol, where the polyamide block has a hard segment, Each ether block constitutes a soft segment.

A polyether block amide copolymer and a weather resistance improver were dry blended at a ratio of “Pevax MV3000” / “Pevax MV1041” / “MM33SU01” = 70/30/5, and a T-die extruder (caliber 30 mm, C / R: 2.75, L / D: 38) was melt-extruded at a temperature of 210 ° C. and then stretched in the warp direction while cooling to obtain a polyamide elastomer film having a thickness of about 15 μm. The physical properties of the elastomer film were measured. The 100% modulus was 8.2 MPa and 7.5 MPa, the breaking strength was 29 MPa and 25 MPa, and the elongation at break was 620% and 580%. Furthermore, the moisture permeability was 27500 g / m ² · 24 hrs.

Furthermore, after preparing a reactive hot-melt polyurethane adhesive (“Tyforth NH-320” manufactured by DIC Corporation) as a curable adhesive and melting it at 120 ° C. (melt viscosity 2500 mPa · s), Using a 42-mesh dot gravure roll (dot diameter 0.5 mm, dot interval 0.1 mm, adhesion area 63%, depth 0.1 mm), the area occupied by the adhesive on the surface of the elastomer film is the film surface ( About 50 g / m ^{2 of the} adhesive was partially applied so that the total area of the coated surface was about 60%.

  And after naturally cooling an adhesive agent, the said fiber fabric was piled up on the surface which apply | coated the adhesive agent, the thermocompression bonding was carried out at the pressure of 300 kPa, and the laminated fabric of this invention was obtained by aging at normal temperature for 3 days.

(Example 2)
"Pebax MV1041", "Pevax MV3000", and a weather resistance improver ("MM33SU01" manufactured by Arkema Co., Ltd.), which are dry blended at a ratio of 30/70/3, are melt extruded at a temperature of 220 ° C to give a polyamide. A laminated fabric was obtained in the same manner as in Example 1 except that the elastomer film was obtained.

When the physical properties of the elastomer film were measured, the 100% modulus was 13 MPa and weft 12 MPa, the breaking strength was 45 MPa and 38 MPa, the elongation at break was 510% and 500%, and The wettability was 13600 g / m ² · 24 hrs.

(Example 3)
Using a polyethylene terephthalate multifilament yarn 28dtex / 7f, a 28-gauge tricot knitted fabric was knitted and scoured by a conventional method to prepare a lining.

Next, after melting the polyurethane adhesive “Tyforce NH-320” at 120 ° C., a 56-mesh dot gravure roll (dot diameter 0.4 mm, dot interval 0.05 mm, adhesion area 71%, depth 0) 0.08 mm), the adhesive was partially applied to the surface of the elastomer film of the laminated fabric obtained in Example 2 so that the area occupied by the adhesive was about 65% of the total area of the film surface (application surface). About 35 g / m ^{2 was} applied.

  And after naturally cooling an adhesive agent, the said lining was piled up on the surface which apply | coated the adhesive agent, and it carried out similarly to Example 1 after that, and obtained the laminated fabric.

Example 4
Using a T-die extruder (caliber 30 mm, C / R: 2.75, L / D: 38), a polyether block amide copolymer (“Pevax MV1041” manufactured by Arkema Co., Ltd.) at a temperature of 230 ° C. After melt extrusion, the polyamide elastomer film having a thickness of about 12 μm was obtained by stretching in the warp direction while cooling. The physical properties of the elastomer film were as follows: 100% modulus: warp 17 MPa, weft 15 MPa, break strength: warp 85 MPa, weft 71 MPa, break elongation: warp 750%, weft 670%, and moisture permeability: 10060 g / m ² · 24 hrs.

Then, a polycarbonate-type polyurethane-based adhesive (solid content: 48 mass%, viscosity: 2700 mPa · s (25 ° C.)) having the composition shown in Formula 1 below as a curable adhesive was prepared, and the dot-shaped gravure roll used in Example 1 Was used to partially apply about 100 g / m ^{2 of} adhesive to the surface of the elastomer film so that the area occupied by the adhesive was about 60% of the total area of the film surface (application surface).

  Then, after drying at 120 degreeC for 2 minute (s), the fiber fabric used in Example 1 was piled up on the surface which apply | coated the adhesive agent, and it carried out similarly to Example 1 after that.

<Prescription 1>
Polycarbonate-type polyurethane resin solution 100 parts by mass (“Rezamin UD8348” manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 70% by mass)
8 parts by mass of isocyanate-based crosslinking agent solution (“Rezamin UD crosslinking agent” manufactured by Dainichi Seika Kogyo Co., Ltd., solid content: 75% by mass)
Cross-linking accelerator solution 1 part by mass ("HI101" manufactured by Dainichi Seika Kogyo Co., Ltd., solid content 22% by mass)
25 parts by mass of toluene 25 parts by mass of methyl ethyl ketone

Next, using an 80 mesh dot gravure roll (dot diameter 0.25 mm, dot interval 0.05 mm, adhesion area 60%, depth 0.07 mm), the other surface of the elastomer film was coated with an adhesive. The polycarbonate polyurethane adhesive was partially applied at about 80 g / m ² so that the occupied area was about 55% with respect to the total area of the film surface (application surface).

  And after drying at 120 degreeC for 2 minutes, the lining used in Example 3 was piled up on the surface which apply | coated the adhesive agent, thermocompression-bonded by the pressure of 300 kPa, and it aged at 40 degreeC for 3 days, A laminated fabric was obtained.

(Comparative Example 1)
Using a comma coater, 65 g / m ^{2 of} a polyurethane adhesive (solid content 23 mass%) having the composition shown in the following prescription 2 is applied to the release surface of a release paper (“EV130TPO” manufactured by Lintec Corporation) over the entire surface. Then, a polyurethane elastomer film having a thickness of about 15 μm was obtained by drying at 100 ° C. for 3 minutes. The physical properties of the elastomer film are as follows: 100% modulus: 8.5 MPa, weft: 8.0 MPa, breaking strength: 62 MPa, weft: 61 MPa, breaking elongation: 570%, weft 560%, moisture permeability: 28600 g / m ^2. 24 hrs.

<Prescription 2>
100 parts by mass of an ether-type moisture-permeable and waterproof polyurethane resin solution (“Samprene HMP-17A” manufactured by Sanyo Chemical Industries, Ltd., solid content: 30% by mass)
30 parts by mass of methyl ethyl ketone

  Next, a laminated fabric was obtained in the same manner as in Example 1 except that the polyurethane elastomer membrane was used instead of the polyamide elastomer membrane.

(Comparative Example 2)
By applying the method in Example 3 mutatis mutandis, the lining used in Example 3 was laminated on the elastomer film surface of the laminated fabric obtained in Comparative Example 1 to obtain a laminated fabric.

(Comparative Example 3)
A laminated fabric was obtained in the same manner as in Example 4 except that the isocyanate-based crosslinking agent solution was removed from <Prescription 1>.

  The physical properties of the laminated fabrics obtained in the above examples and comparative examples are shown in Table 1 below.

  In the table, “home washing / wet heat treatment” means 10 times of washing based on JIS L0217 103 method, tumble drying at 60 ° C. for 30 minutes, autoclaving at 135 ° C. for 80 minutes, and further 60 ° C. The process of tumble drying for 30 minutes is defined as one cycle, and this is repeated 10 cycles for the laminated fabric. “Industrial washing / moisture heat treatment” refers to the process of autoclave treatment at 135 ° C. for 80 minutes and tumble drying at 60 ° C. for 30 minutes as one cycle after industrial washing under the above conditions. Is repeated 10 cycles.

  Further, “initial stage” refers to a stage before the above-described series of washing and autoclave processes are performed.

  The laminated fabric of the present invention is excellent in washing durability, moist heat resistance and alkali resistance. In particular, the laminated fabric according to Examples 3 and 4 provided with a lining had durability enough to withstand industrial washing.

On the other hand, in Comparative Examples 1 and 2 using polyurethane as the elastomer film instead of polyamide, the film was severely damaged and could not be used. In Comparative Example 3, since no cross-linking agent was used, the membrane peeled from the fiber fabric during a series of washing and autoclave treatment, specifically, during the third cycle. For this reason, moisture permeability waterproofness was not able to be evaluated.

Claims (5)

A fabric in which a fiber fabric, a curable adhesive, and a polyamide-based elastomer film are laminated in this order, and after 10 times of washing based on the JIS L0217 103 method, tumble drying at 60 ° C. for 30 minutes and 80 minutes at 135 ° C. The water pressure resistance based on JIS L1092 6.1B method (high water pressure method) after repeating the autoclave treatment and tumble drying at 60 ° C. for 30 minutes as one cycle for 10 cycles is 100 to 500 kPa. A laminated fabric characterized by having a moisture permeability of 6000 to 20000 g / m ² · 24 hrs based on L1099 7.2.1B-1 method (potassium acetate method).   A medical article comprising the laminated fabric according to claim 1. A fabric obtained by further laminating a curable adhesive and a lining in this order on the polyamide-based elastomer film of the laminated fabric according to claim 1, which is autoclaved at 135 ° C. for 80 minutes after industrial washing and further 60 ° C. The water pressure resistance based on the JIS L1092 6.1B method (high water pressure method) after repeating the tumble drying step for 30 minutes at 1 cycle for 10 cycles is 100 to 500 kPa, and also JIS L1099 7.2.1B. A laminated fabric characterized by having a water vapor transmission rate of 4000 to 15000 g / m ² · 24 hrs based on the -1 method (potassium acetate method).   The polyamide-based elastomer film is composed of a polyether block amide copolymer comprising a hard segment mainly composed of nylon 12 and a soft segment mainly composed of polyalkylene glycol. 3. The laminated fabric according to 3. A medical article comprising the laminated fabric according to claim 3 or 4.