Operating coat

Abstract

The invention discloses a surgical gown which comprises a front part piece, a first reinforcing piece attached to the inner side of the front part piece, two sleeves arranged on the two sides of the front part piece and second reinforcing pieces attached to the inner sides of the sleeves, and at least one part of each second reinforcing piece is an overlapping area. According to the operating gown, the microbial permeation resistance, the liquid penetrability, the mechanical strength and the wearing hydrophobicity are remarkably improved, and particularly, the liquid penetrability and the water vapor permeability are remarkably improved at sleeve joints.

Description

Technical Field

[0001] The invention relates to clothing related to the field of medical care, in particular to a surgical gown. Background Art

[0002] Surgical gowns are protective garments designed for use in operating rooms and other medical environments. Their main purpose is to protect patients and medical staff from bacteria and viruses. The main function of surgical gowns is to prevent the spread of microorganisms, bacteria and other contaminants in the operating room. They are often used in operating rooms, laboratories and other medical environments to ensure that doctors and nurses are not at risk of potential infection when handling patients.

[0003] The development history of surgical gowns can be traced back to the late 19th century and early 20th century. The original purpose of surgical gowns was to create a barrier between non-sterile and sterile areas to prevent wound infection. With the in-depth understanding of the transmission of blood-borne pathogens such as HIV and HBV, the demand for effective barrier properties of fabrics used in surgical gowns, drapes and coverings is increasing.

[0004] Surgical gowns can generally be broken down into the front piece, the back piece and the sleeves on both sides. The main functions of surgical gowns include providing a clean and sterile environment, especially to protect medical staff, reduce the generation and spread of microparticles, and provide good comfort and flexibility. The functions that people are more concerned about are often microbial penetration index, cleanliness, liquid penetration, product strength and comfort.

[0005] Nevertheless, not all locations of existing surgical gowns meet the above requirements, especially the seams generated when the various parts of the surgical gown are assembled, and the locations that are in close contact with the skin surface of medical staff for a long time due to gravity or external forces, all of which have a greater risk of penetration. The requirements of surgical gowns in the industry for critical areas and non-critical locations vary greatly. In order to improve the performance parameters of critical areas, such as by adding a polymer film layer to improve liquid penetration performance, it also causes a decrease in breathability, an increase in product weight, and an increase in production costs.

[0006] Chinese patent CN107846996B (published on March 27, 2018) discloses a disposable surgical gown with good air permeability and an additional elastic film on the SMS front sheet and sleeve substrate. The elastic film is mainly a polyethylene copolymer elastomer, and a fluoroacrylate copolymer is added to improve light transmittance. This technical solution does not focus on improving key performances such as microbial penetration and liquid permeability of the product, nor does it provide an improved technical solution for improving the safety performance of the suture. Summary of the invention

[0007] Purpose of the invention: The purpose of the present invention is to provide a surgical gown that simultaneously improves microbial barrier properties, mechanical strength and comfort, and in particular to provide a gown that improves product performance by optimizing reinforcement layers in critical areas and containing seams.

[0008] Technical solution: For the above invention purpose, the present application provides a surgical gown, which includes:

[0009] Front placket,

[0010] A first reinforcing sheet attached to the inner side of the front flap,

[0011] Two sleeves arranged on both sides of the front placket, and

[0012] A second reinforcing sheet attached to the inner side of the sleeve;

[0013] Wherein, the first reinforcing sheet and the second reinforcing sheet respectively include at least one layer of hydrophobic and breathable flexible sheet, and the second reinforcing sheet forms an overlapping area in the sleeve; any position of the composite material formed by attaching the first reinforcing sheet or the second reinforcing sheet to the surgical gown simultaneously satisfies the following characteristics:

[0014] Wet microbial penetration test does not exceed 6.0I B , liquid penetration test is not less than 110cm H2O, wet burst strength test is not less than 200kPa, wet tensile strength test is not less than 75N, water vapor transmission rate is 10 3 -10 4 g / m 2 ·sky.

[0015] The critical areas of the present invention refer to the areas most likely to come into contact with blood and other body fluids, such as the front flap and sleeves of the surgical gown, which correspond to the locations where the first reinforcement sheet and the second reinforcement sheet are arranged, respectively. The back area of ​​the surgical gown is away from the risk of wounds and possible exposure, and is therefore considered a non-critical area. For the requirements of surgical gowns in critical and non-critical areas, please refer to the detailed records in the EN 13795-1 standard document.

[0016] Among them, the wet microbial penetration test is based on the EN ISO 22610 standard, the liquid penetration test is based on the EN ISO 811 standard, the wet burst strength test is based on the EN ISO 13938-1 standard, and the wet tensile strength test is based on the EN29073-3 standard. The performance of the surgical gown provided by the present invention in the key areas meets the performance requirements of the key areas of high-performance surgical gowns in the EN 13795-1 standard document.

[0017] The surgical gown provided by the present invention can be made by any tailoring process, including by splicing fabrics at any position. The present invention is particularly suitable for surgical gowns with seams formed in key areas, overcoming the inadequate microbial barrier performance caused by seams distributed in key areas in the prior art. In this scenario, the overlap area is arranged near the seam in the key area and attached to the inner side of the seam of the sleeve.

[0018] The overlapping area includes at least two layers of hydrophobic breathable flexible sheets, and has an overlapping width of 10-15 cm along the circumferential direction of the sleeve. The specific overlapping width can significantly improve the liquid permeability of the seams in the key areas of the surgical gown without affecting the breathability. As a preferred embodiment of the present invention, the overlapping area has an overlapping width of 11.5-12.5 cm along the circumferential direction of the sleeve, with an overlapping width of 12 cm being optimal.

[0019] Furthermore, the seam is formed by any one of heat pressing, sewing and bonding. As a preferred embodiment of the present invention, the seam comprises a heat pressing point matrix distributed along the length direction of the sleeve, and the heat pressing points in the heat pressing point matrix have at least 2mm 2 area.

[0020] The front flap and sleeves of the present invention are made of a composite nonwoven material having at least one meltblown nonwoven layer. Other non-critical areas of the surgical gown, such as the back area, can also be made of a composite nonwoven material.

[0021] Specifically, the composite nonwoven material of the present invention is composed of at least one meltblown nonwoven layer (Meltblown Layer) and at least one spunbond nonwoven layer (Spunbond Layer). As a preferred embodiment, the composite nonwoven material is selected from any one of SMS, SMSS, SMMS, SMMSS, SSMMS, and SSMMMS. The above materials are all composite nonwoven materials made of polypropylene fibers through spinning and hot-melt technology. In addition to the characteristics of being non-toxic, odorless, and highly effective in isolating pathogens, they also have the advantages of good antistatic and isolation of blood stains. Among them, the meltblown nonwoven layer and the spunbond nonwoven layer can be laminated and composited in any number of layers and in any order. Preferably, the meltblown nonwoven layer is mainly located in the middle layer.

[0022] As a further optimization of the present invention, the composite nonwoven fabric material has a grammage of 30-50 gsm. The composite nonwoven fabric material has a grammage of not less than 5×10 4 g / m 2 / day water vapor transmission rate.

[0023] The second reinforcing sheet of the present invention is distributed along the length direction of the sleeve, and the appropriate distribution length is selected according to actual needs, production costs and other factors. In order to meet the requirements of the EN 13795-1 standard on the key areas of surgical gowns, the second reinforcing sheet should at least completely cover the forearm area of ​​the sleeve. The surgical gown also includes an elastic tightening portion provided at the distal end of the sleeve, and the elastic tightening portion is sewn and connected to the sleeve and the second reinforcing sheet.

[0024] The hydrophobic breathable flexible sheet material of the present invention comprises at least one layer of non-woven fabric and at least one layer of polymer elastic layer. Preferably, the hydrophobic breathable flexible sheet material is formed by compounding a layer of non-woven fabric and a layer of polymer elastic layer through a hot pressing process.

[0025] Furthermore, the non-woven fabric fibers are independently selected from any one of polypropylene fibers, polyester fibers, nylon fibers, acrylic fibers, high-density polyethylene fibers, and polyvinyl chloride fibers.

[0026] The polymer elastic layer is independently selected from any one including but not limited to polyethylene, polypropylene, polyvinyl alcohol, polytetrafluoroethylene, and polyether block polyamide.

[0027] Furthermore, the polymer elastic layer is attached to the front flap and the sleeve. The "attachment" mentioned in the present invention includes directly fixing the entire polymer elastic layer to the surface of the front flap and the sleeve by any one or more methods of heat pressing, sewing, and bonding; or fixing a part of the polymer elastic layer by the above methods. Preferably, the fixing is performed by peripheral bonding to reduce the possible influence of the adhesive layer on the air permeability.

[0028] Furthermore, the surgical gown of the present invention further comprises a viscose layer applied on one side of the hydrophobic breathable flexible sheet. The other side of the viscose layer may be the front placket and sleeve of the surgical gown, or may be another layer of hydrophobic breathable flexible sheet adjacent to the hydrophobic breathable flexible sheet in the overlapping area.

[0029] Specifically, the adhesive layer is a polyvinyl acetate having a viscosity of 1000-5000 cps and a solid content of 40-80% at a rate of 1-5 g / m 2The adhesive layer is obtained by coating with a dosage of 4.4-4.8 g / m 2 The inventors further found that the use of 4.6g / m 2 The desired peel strength can be ensured and the amount of glue used can be controlled to a minimum, so as not to affect the overall air permeability, nor make the material attached with the reinforcement layer too hard, affecting the wearing comfort. In addition, it is worth noting that if other adhesives other than polyvinyl acetate are used in the present invention, the expected effect can often not be achieved. Some adhesives themselves have toxic or volatile gases, and some will damage adjacent structures during the gluing process, especially affecting the polymer elastic layer in the hydrophobic breathable flexible sheet, thereby affecting the wet microbial barrier performance of the area.

[0030] More preferably, the adhesive layer is obtained by coating polyvinyl acetate on one side of the hydrophobic breathable flexible sheet corresponding to the polymer elastic layer, so as to bond with the spunbond nonwoven layer of the composite nonwoven material. Applying adhesive on one side of the polymer elastic layer will give a better adhesive effect; and the nonwoven fiber layer distributed on the surface will make the wearer feel more comfortable; while the reinforcing layer on the inner surface of existing similar products is mostly an airtight adhesive layer, which is not comfortable enough, has a hard texture and poor air permeability, and the wearer can clearly feel the product defects during a long operation.

[0031] As a preferred embodiment of the present invention, the second reinforcing sheet of the surgical gown forms a non-overlapping area having a layer of hydrophobic breathable flexible sheet and an overlapping area having two layers of hydrophobic breathable flexible sheet in the sleeve, and the surgical gown is located at any position of the composite material of the overlapping area and satisfies the following characteristics at the same time:

[0032] Wet microbial penetration test does not exceed 6.0I B , liquid penetration test is not less than 250cm H2O, wet burst strength test is not less than 250kPa, wet tensile strength test is not less than 85N, water vapor transmission rate is 10 3 -10 4 g / m 2 ·sky.

[0033] More preferably, the composite material of the overlapping area of ​​the second reinforcing sheet satisfies the following properties at the same time:

[0034] Wet microbial penetration test does not exceed 6.0I BLiquid penetration test is not less than 300cm H2O and not more than 400cm H2O; wet burst strength test is not less than 300kPa and not more than 400kPa; wet tensile strength test is not less than 85N and not more than 100N; water vapor transmission rate is 2×10 3 -3×10 4 g / m 2 · days. The water vapor transmission rate is obtained according to the test method provided by ASTM E96 standard.

[0035] The surgical gown provided by the present invention meets all performance requirements of the reinforced surgical gown in critical areas and non-critical areas in the EN 13795-1 standard document. For the sleeves with seams made of non-woven fabric materials, an improved reinforcement layer attached to the inner side is provided, which not only does not affect the breathability but also does not significantly increase the weight of the product. The sleeves have the characteristics of soft texture and comfortable wearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a schematic diagram of the structure of the surgical gown described in Example 1;

[0037] Figure 2 yes Figure 1 Rear view of

[0038] Figure 3 is a top view schematic diagram of the left sleeve of the surgical gown after being turned inside out;

[0039] Figure 4 yes Figure 3 Enlarged schematic diagram of part A in the middle. DETAILED DESCRIPTION

[0040] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the specific embodiments of the accompanying drawings.

[0041] Example 1

[0042] like Figure 1 , Figure 2As shown, this embodiment provides a surgical gown, which includes a front 110, and the left and right sides of the front 110 extend backward to form a left back piece 122 and a right back piece 124, and the upper part of the front is provided with a left sleeve 132 and a right sleeve 134 corresponding to the wearer's shoulders. A first tie 112 is provided on the left and right sides of the front 120. The front 110 and the back pieces 122, 124 are cut from a complete composite non-woven material and are sewn to each other at the upper edge. A second tie 114 is provided on the side edges of the back pieces 122, 124. The left sleeve 132 and the right sleeve 134 have a shape that gradually shrinks toward the distal end, and are also formed by cutting and splicing a complete composite non-woven material, and a seam 136 is formed at the splicing. The seam 136 is located above the sleeves 132, 134, extending from the shoulder to the distal end of the sleeve, corresponding to the wrist of the user. The distal end is provided with a cuff 138 with elastic tightening properties.

[0043] The inner surface of the front 110 is attached with a first reinforcing sheet 140, which can almost cover most of the chest and abdomen of the wearer; the inner surfaces of the left and right sleeves 132, 134 are attached with second reinforcing sheets 150, which extend from the upper arm to the wrist. The first reinforcing sheet 140 and the second reinforcing sheet 150 are both a layer of hydrophobic breathable flexible sheet; the second reinforcing sheet 150 forms an overlapping area 152 near the seam 136 of the sleeve, with two layers of hydrophobic breathable flexible sheet, and the part other than the overlapping area 152 is a non-overlapping area, with a layer of hydrophobic breathable flexible sheet.

[0044] In this embodiment, the hydrophobic and breathable flexible sheet is made of a composite of a polypropylene non-woven fabric and a polyethylene film, and the material has a gram weight of 35±2gsm. The polyethylene film is arranged on the side facing the front plate and the sleeve, and is fixed to the front plate and the sleeve by an adhesive layer. The adhesive layer is a polyvinyl acetate with a viscosity of 3000cps, a solid content of 60%, a pH of 5.0, and a specific gravity of 1.05 at a density of 1-5g / m 2 The obtained amount is coated and then dried.

[0045] The composite nonwoven material selected in this embodiment is SMS nonwoven, on which a hot melt ratio of 17.12% and a depth of 0.6mm are formed by hot melting. The composite nonwoven material has a gram weight of 35gsm and has the following characteristics: according to the EN29073-3 test method, its dry / wet longitudinal tensile strength is not less than 65N / 5cm, and its dry / wet transverse tensile strength is not less than 35N / 5cm; according to the test method provided by ASTM D5587, its average value of the transverse trapezoidal tear strength is not less than 10N and the average value is not less than 15N; according to the test method provided by EN ISO 811, the hydrostatic pressure is not less than 38cm H2O; according to the test method provided by EN ISO 13938-1, its dry / wet bursting strength is not less than 10N and the average value is not less than 15N; according to the test method provided by ASTM D6701, its water vapor transmission rate (WVTR) is 55124.58g / m 2 / sky.

[0046] For the area where the first reinforcing sheet is attached, and the non-overlapping area where the second reinforcing sheet is attached, any position in the area simultaneously meets the following requirements: The wet microbial penetration test does not exceed 6.0I B , liquid penetration test is not less than 110cmH2O, wet burst strength test is not less than 200kPa, wet tensile strength test is not less than 75N, water vapor transmission rate is 10 3 -10 4 g / m 2 / sky.

[0047] For the overlapping area with the second reinforcing sheet attached, any position in the area simultaneously meets the following requirements: The wet microbial penetration test does not exceed 6.0I B , liquid penetration test is not less than 250cm H2O, wet burst strength test is not less than 250kPa, wet tensile strength test is not less than 85N, water vapor transmission rate is 10 3 -10 4 g / m 2 / sky.

[0048] The test methods for the above performance parameters are all recorded in the EN 13795-1 standard document.

[0049] Example 2

[0050] Based on Example 1, this example uses a hot pressing process to make a sleeve with a seam. Figure 3 and Figure 4 As shown, Figure 3 The schematic diagram of the top view of the left sleeve 232 after the surgical gown is turned inside out is shown. Figure 4An enlarged schematic diagram of the seam 236 is shown. The seam 236 formed by the hot pressing process extends from the neckline to the cuff 238. After the second reinforcing sheet 250 on the inner surface of the sleeve is wrapped around once, it continues to extend 12 cm in the circumferential direction to form an overlapping area 252. The seam 236 is located near the symmetrical midline of the overlapping area 252. The non-overlapping area 254 has only one layer of hydrophobic and breathable flexible sheet. The non-overlapping area of ​​the second reinforcing sheet 250 is fixed to the inner surface of the sleeve by gluing near the outer edge of the neckline. The overlapping area 252 requires additional gluing to form an adhesive layer 256, so that the overlapping hydrophobic and breathable flexible sheets are bonded to each other and fixed to the inner surface of the sleeve. The distal end of the left sleeve 232, the distal end of the second reinforcing sheet 250, and the elastic tightening part located at the cuff 238 are sewn together.

[0051] The seam 236 is formed by fixing the edges of the front and rear ends of a whole hydrophobic and breathable flexible sheet material to each other by dot matrix hot pressing after the sheet is wrapped around the mold. The hot pressing dot matrix 237 is distributed along the length of the seam, with a width of 0.4-0.7mm and arranged in three columns. The hot pressing points in the middle column just correspond to the gaps between the front and rear hot pressing points in the adjacent column. The seam 236 formed in this way has good air permeability. The size of the hot pressing point is about 1mm×2mm in the shape of an oblong or rounded rectangle, and the hot pressing points in two adjacent columns are oriented in different directions to ensure longitudinal and transverse tensile strength.

[0052] Example 3

[0053] This example uses a hydrostatic pressure test to evaluate the effect of the seam overlap on the liquid permeability of the overlapped area of ​​the second reinforcing sheet at the seam. The experiment found that controlling the width of the seam overlap can significantly improve the performance. According to the test methods described in EN ISO 811 and ASTM E96 standards, 9cm, 10cm, 11cm, 12cm, 13cm, and 14cm samples were tested respectively, and the results are shown in Table 1:

[0054] Table 1 Effect of different seam overlap widths on material properties

[0055]

[0056] Example 4

[0057] This example further evaluates the performance parameters of the surgical gowns provided in the previous examples, and purchases reinforced surgical gowns on the market as a control group for testing. The surgical gowns provided by the control group also have a reinforcement layer in the key area, the reinforcement layer is a breathable composite material, and the overlap width of the reinforcement layer is 2-3 cm.

[0058] Table 2

[0059]

[0060] illustrate:

[0061] 1. Test conditions: The concentration of challenge bacteria is 10 8 CFU / g talc, vibration time 30min;

[0062] 2. For this document, I B =6.0 means the maximum value allowed without penetration.

[0063] Table 3 Surgical gown provided by the present invention

[0064]

[0065] Table 4 Prior art reinforced surgical gown

[0066]

[0067] Among them, MD and CD represent material directions, MD represents machine direction, and CD represents cross direction.

[0068] Test evaluation: The present invention can meet the high performance requirements of EN 13795-1, and the performance is better at the double-layer overlap position of the sleeve reinforcement layer. The performance at the double-layer overlap position is as follows: The wet microbial penetration test does not exceed 6.0I B , liquid penetration test is not less than 250cm H2O, wet burst strength test is not less than 250kPa, wet tensile strength test is not less than 85N, water vapor transmission rate is 10 3 -10 4 g / m 2 / sky.

[0069] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A surgical gown, characterized in that: The surgical gown comprises: Front placket, A first reinforcing sheet attached to the inner side of the front flap, Two sleeves arranged on both sides of the front placket, and A second reinforcing sheet attached to the inner side of the sleeve; Wherein, the first reinforcing sheet and the second reinforcing sheet respectively include at least one layer of hydrophobic and breathable flexible sheet, and the second reinforcing sheet forms an overlapping area in the sleeve; any position of the composite material formed by attaching the first reinforcing sheet or the second reinforcing sheet to the surgical gown simultaneously satisfies the following characteristics: Wet microbial penetration test does not exceed 6.0I B , liquid penetration test is not less than 110cm H2O, wet burst strength test is not less than 200kPa, wet tensile strength test is not less than 75N, water vapor transmission rate is 10 3 -10 4 g / m 2 ·sky.

2. A surgical gown according to claim 1, characterized in that: The sleeve is provided with a seam, and the overlapping area is attached to the inner side of the seam of the sleeve.

3. A surgical gown according to claim 2, characterized in that: The overlapping area includes at least two layers of hydrophobic and breathable flexible sheets and has an overlapping width of 10-15 cm along the circumferential direction of the sleeve.

4. The surgical gown according to claim 2 or 3, characterized in that: The seam is formed by any one of heat pressing, sewing and bonding.

5. The surgical gown according to claim 4, characterized in that: The seam comprises a hot pressing point matrix distributed along the length direction of the sleeve, and the hot pressing points in the hot pressing point matrix have a thickness of at least 2 mm. 2 area.

6. A surgical gown according to any one of claims 1 to 5, characterized in that: The front flap and the sleeve are made of a composite non-woven fabric material having at least one melt-blown non-woven fabric layer.

7. A surgical gown according to claim 6, characterized in that: The composite non-woven fabric material is selected from any one of SMS, SMSS, SMMS, SMMSS, SSMMS, and SSMMMS.

8. A surgical gown according to claim 1, characterized in that: The surgical gown further comprises an elastic tightening portion arranged at the distal end of the sleeve, and the elastic tightening portion is sewn and connected to the sleeve and the second reinforcing sheet.

9. A surgical gown according to any one of claims 1 to 8, characterized in that: The hydrophobic breathable flexible sheet comprises at least one layer of non-woven fabric fibers and at least one layer of polymer elastic layer.

10. A surgical gown according to claim 9, characterized in that: The non-woven fabric fibers are selected from any one of polypropylene fibers, polyester fibers, nylon fibers, acrylic fibers, polyethylene fibers, and chloroprene fibers.

11. A surgical gown according to claim 9 or 10, characterized in that: The polymer elastic layer is selected from any one of polyethylene film, polypropylene film, polyvinyl alcohol film, polytetrafluoroethylene film and polyether block polyamide film.

12. A surgical gown according to any one of claims 9 to 11, characterized in that: The polymer elastic layer is attached to the front flap and the sleeve.

13. A surgical gown according to any one of claims 1 to 12, characterized in that: The surgical gown further comprises a viscose layer applied on one side of the hydrophobic, breathable and flexible sheet.

14. A surgical gown according to claim 13, characterized in that: The adhesive layer is a polyvinyl acetate having a viscosity of 1000-5000 cps and a solid content of 40-80% at a rate of 1-5 g / m 2 The obtained amount is coated and then dried.

15. A surgical gown according to any one of claims 1 to 14, characterized in that: The second reinforcing sheet forms a non-overlapping area with a layer of hydrophobic breathable flexible sheet and an overlapping area with two layers of hydrophobic breathable flexible sheets in the sleeve, and the surgical gown is located at any position of the composite material in the overlapping area and meets the following characteristics: Wet microbial penetration test does not exceed 6.0I B , liquid penetration test is not less than 250cm H2O, wet burst strength test is not less than 250kPa, wet tensile strength test is not less than 85N, water vapor transmission rate is 10 3 -10 4 g / m 2 ·sky.

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