JP2010514949A - Attaching the surgical knot - Google Patents

Abstract

The ties are tied to the surgical gown in a manner that is more impervious than conventional methods to meet AAMI level 3 and 4 acceptance criteria.
A surgical gown includes a collar, a cuff, a first tie cord, and a first tie attachment region. In the method for joining a knot to a surgical gown according to the present invention, the step of arranging the knot on the surgical gown and arranging a reinforcing piece on the back surface of the attachment surface of the knot in the surgical gown. And a step of thermally joining the knot to the surgical gown with a PUB pattern in the knot joining region, wherein the knot joining region satisfies an acceptance standard of ASTM test 1671-b. To do.
[Selection] Figure 1

Description

  Surgeons and other healthcare workers often wear over garment during surgery to maintain sterility within the operating room and to protect themselves. An overgarment is typically a surgical gown having a body portion and sleeves and knots attached thereto. The knot is wrapped around the wearer's waist and tied so that the surgical gown is not disturbed. In order to prevent the spread of infection to and from the patient, the surgical gown prevents body fluids and other fluids present during the surgery from passing through the gown.

  Surgical gowns were originally manufactured from cotton or linen and such surgical gowns were reusable and were sterilized before each use in the operating room. However, the material used for this type of surgical gown has the disadvantage that lint tends to form. The resulting lint can float in the air or adhere to the wearer's clothing, creating a new potential source of contamination. In addition, costly cleaning and sterilization processes are necessary before reuse.

  Disposable surgical gowns have largely replaced reusable linen surgical gowns. Today, many disposable surgical gowns are made with fibers that are partially or wholly water repellent or impervious to prevent liquid penetration or “strike through”. Various materials and designs are used in the manufacture of surgical gowns to prevent contamination in various operating room conditions. Today, various levels of surgical gowns in impermeability and comfort are available.

  Although surgical gowns made from fully impervious materials offer a high degree of protection, surgical gowns constructed from this type of material are generally heavy, expensive and hot and uncomfortable for the wearer . In certain surgical gowns, certain portions, such as both shoulders and back portions, are made from lightweight materials to increase breathability and reduce the overall weight of the surgical gown. However, usually, when the air permeability of the material is increased, the water repellency of the material is lowered.

  Because medical personnel are exposed to different levels of blood and / or fluid contamination by different types of surgery, they use the same type of surgical gown in all surgeries performed by medical personnel. That is neither realistic nor economical. Therefore, new guidelines for penetrating ratings such as surgical gowns and gloves have recently been created to guide healthcare professionals. In this new guideline, the Association for the Advancement of Medical Instrumentation (AAMI) has proposed a unified classification system for surgical wear and drapes based on fluid barrier capabilities. This proposal was adopted by the American National Standards Institute (ANSI) and recently as ANSI / AAMI PB70: 2003 (name: liquid barrier capability and classification of protective clothing and drapes for use in medical facilities). It was announced. This standard was also officially approved in October 2004 by the U.S. Food and Drug Administration. This standard establishes four levels of barrier protection for surgical gowns and drapes. The requirements for the design and structure of the surgical gown are based on the expected location and extent of liquid contact to the surgical gown under the conditions expected when using the surgical gown. The highest level of impermeability is AAMI level 4, which applies to the “critical zone” that is most susceptible to and heavily exposed to blood or other body fluids. In the AAMI standard, the “dangerous area” means the front of the surgical gown (chest), including the tie attachment area, and the area of the sleeve and sleeve seam from the cuff up to about 2 inches (5 cm) above the elbow. Defined.

  The body and sleeve of the surgical gown are usually made separately and joined together in some way at the seam in the shoulder area. The sleeves are usually made from a plain knitted fabric of fabric, and before being attached to the body part, the plain knitted fabric is folded and joined at the edges of each side with a seam extending from the shoulder to the wrist along the length of the sleeve Let One knot or a pair of knots is usually attached to the main body portion of the surgical gown. A single knot is wrapped around the waist of the wearer and the ends are tied together to keep the surgical gown in use in place. Two knots are also wrapped around the waist of the wearer and tied together. Seams and knot attachments are areas where many surgical gowns do not meet AAMI test criteria.

US Pat. No. 4,340,563 US Pat. No. 3,692,618 US Pat. No. 3,802,817 US Pat. No. 3,338,992 U.S. Pat. No. 3,341,394 US Pat. No. 3,502,763 US Pat. No. 3,542,615 US Pat. No. 3,849,241 US Pat. No. 5,188,885 US Pat. No. 5,213,881 US Pat. No. 5,271,883 US Pat. No. 5,464,688 US Pat. No. 5,695,868 US Pat. No. 6,037,281 US Pat. No. 6,309,736 US Pat. No. 6,653,523 US Pat. No. 6,764,566 US Pat. No. 3,855,046 US Pat. No. 5,858,515

  Numerous surgical gowns are now on sale that are sewn using ultrasonic seam sealing. Ultrasonic seam sealing joins multiple layers of material together with sufficient strength, but this joint is a test that is currently required to meet the new AAMI level 4 protection standard, ASTM-1671-b (bacteriophage penetration resistance Test) and water resistance test (AATCC test method 127-1998) required to meet AAMI level 3 protection standards. This is especially true for sleeve seams and knot attachments.

  Therefore, there is clearly a need for a surgical gown having a knot attachment that is impervious to current methods and joined in a manner that meets the acceptance criteria of AAMI levels 3 and 4.

  In order to solve the above-mentioned problems faced by those skilled in the art, the point-unbonding bond pattern is effectively utilized, with or without the use of a reinforcing piece, in the string attachment part of the surgical gown. A tie is tied to a surgical gown so that the lace attachment meets the acceptance criteria of the AAMI level 3 test (AATCC test method 127-1998) and the AAMI level 4 test (ASTM-1670 and 1671-b).

1 is a front view of an exemplary surgical gown 100 worn during a medical procedure. 1 is a rear view of an exemplary surgical gown 100 worn during a medical procedure.

  The present invention relates to the use of joints satisfying AAMI level 3 and 4 barriers and the placement of reinforcing pieces for surgical gowns and similar articles made with a thermosensitive laminated barrier material made of thermoplastic polymers. About.

  Many surgical gowns are made using heat-sensitive laminated barrier materials made of thermoplastic polymers. The barrier material may be in the form of thermoplastic polymer spunbond fibers, thermoplastic polymer meltblown fibers, and various combinations of the spunbond fibers and the meltblown fibers. Also, in a particularly desirable form of the barrier material, the breathable membrane is one or more breathable that provides a sufficient level of breathability and / or water vapor permeability and a desirable level of impermeability to liquids and pathogens. It has a thin film.

  These breathable thin films are typically made from relatively low cost, processable polyolefin thermoplastic polyolefins and their copolymers, such as polyethylene and polypropylene. Polyethylene is generally used to make the membrane, and the membrane usually has calcium carbonate, various types of clay, silica, alumina, barium carbonate, sodium carbonate, magnesium carbonate, Talc, barium sulfate, magnesium sulfate, aluminum sulfate, titanium dioxide, zeolite, cellulose type powder, kaolin, mica, carbon, calcium oxide, magnesium oxide, aluminum hydroxide, pulp powder, wood powder, cellulose derivatives, chitin and chitin derivatives “Filled”. When the membrane is stretched, the filler forms fine pores in the membrane and increases the porosity of the membrane. Unfortunately, however, such breathable membranes are considered heat sensitive because they are susceptible to damage by heat and / or pressure. When the membrane is sandwiched between various combinations of different materials (eg, spunbond fibers, meltblown fibers, and combinations thereof) and incorporated into a laminated barrier material, the resulting laminated barrier material is generally also heat sensitive. It is considered sex. This feature is particularly important in the formation process after lamination. That is, it is particularly important in manufacturing operations for producing laminated barrier fibers from heat-sensitive barrier fibers after forming the film. For example, when creating surgical gowns or other articles from heat sensitive barrier materials using hot spot bonding and / or ultrasonic bonding techniques, or attaching components such as knots or other members to the article Often, the breathable membrane of the laminated barrier material is damaged and fails to provide the desired level of barrier to liquid and pathogen penetration.

  “Spunbond” means a small diameter fiber formed by extruding molten thermoplastic material as a single fiber from a plurality of fine capillaries with a spinneret, usually circular cross-sectional shape. Thereafter, the diameter of the obtained fiber is abruptly reduced, for example, as disclosed in Patent Documents 1 to 7. Spunbond fibers are generally not tacky when deposited on a collection surface. Spunbond fibers are generally continuous and have an average diameter (based on at least 10 samples) of greater than 7 μm, especially about 10-20 μm.

  "Meltblown" fibers are a convergent, usually hot, high-speed gas stream (eg air) that converges as a melted yarn or single fiber from a plurality of fine die capillaries, usually having a circular cross-sectional shape. It is formed by reducing the diameter of a single fiber of thermoplastic material that is extruded into and melted by the flow to the extent of the diameter of the microfiber. The meltblown fiber is then transported by the high velocity gas stream and deposited on a collection surface to form a randomly dispersed meltblown fiber web. Such a process is disclosed in Patent Document 8, for example. Meltblown fibers are continuous or discontinuous microfibers that generally have an average diameter of less than 10 μm and are generally tacky when deposited on a collection surface.

  An exemplary method for forming a film is to form a film having multiple layers of a surface layer and a core layer using a co-extrusion film apparatus. Typically, the apparatus comprises two or more polymer extruders. In one manufacturing method, the film is extruded between a pair of nip rollers or chill rollers. In another method, the membrane is extruded onto a chilled roller that can be finished smoothly or matte. Typically, the total thickness at the initial formation of the film is about 25 to 60 μm, and in the case of a multilayer film, the total initial thickness of the surface layer and the bonding layer is about the total thickness of the multilayer film. 3 to 30%. Other usable film manufacturing methods known to those skilled in the art include cast embossing, chill and planar casting, blown film processes, and the like.

  The membrane is led from the co-extrusion membrane device to a membrane stretching unit. Examples of the membrane stretching unit include an apparatus such as a machine direction orienter (MDO) commercially available from vendors such as Marshall and Williams Company of Providence, Rhode Island. Such an apparatus includes a plurality of stretching roller pairs that move at a predetermined speed, and one of the stretching roller pairs rotates at a faster speed, a slower speed, or the same speed with respect to the other. Typically, the stretching roller moves at a speed that gradually increases so that the film is gradually stretched and thinned as it travels in the longitudinal direction (the direction in which the film moves through the process). The stretching roller is generally heated to enhance the processing effect.

  The temperature at which the membrane is heated while being stretched is determined by the composition of the membrane and the breathability and other final desired properties of the laminate. In most cases, the membrane is heated to a temperature less than 5 ° C. below the melting point of the core or “B” layer of the membrane. The purpose of heating the film is to quickly stretch the film without causing film defects. The amount by which the membrane is stretched is determined according to the polymer composition of the membrane, but in general, the membrane is stretched to about 300% or more of its original length, less than the amount that tends to cause membrane defects. (Ie, if the original length is 1 cm, it is stretched to 3 cm). For example, for most applications, the stretch rate of the membrane is at least 200% of its original length, often in the range of about 250-500%.

  The thinned multilayer film is laminated on one or more support layers to produce a multilayer / nonwoven laminate as described above. The support layer can be formed using, for example, a conventional fibrous nonwoven web forming apparatus (for example, a pair of spunbond apparatuses). After substantially continuous long fibers are deposited on the forming wire to form an unbonded web, the unbonded web is fed through a pair of bonding rollers to bond the fibers together and tear the web support layer produced. Increase strength. One or both of the rollers are often heated to promote bonding. Typically, one of the rollers is formed with a discontinuous bonding pattern having a predetermined bonding surface area to be applied to the web. The other roller is usually a smooth anvil roller, and if desired, a pattern is formed in the same manner as the one roller.

  When the multilayer film is sufficiently stretched and thinned, while the support layer is formed, the two layers are superimposed on each other and laminated using a pair of lamination rollers or other means. As with the joining roller, the laminating roller can also be heated. Moreover, the discontinuous joining pattern which has a predetermined joining surface area for providing to the produced laminated material is formed in at least one of the said lamination | stacking rollers. In general, the maximum bonding area ratio on one side of the laminate does not exceed about 50% of the total surface area of the one side.

  The method described above can also be used to create a three-layer laminate. In that case, the method described above is changed only in that the second fibrous nonwoven web support layer is fed to the laminating roller and supplied to the surface of the multilayer film opposite to the other nonwoven web support layer. Alternatively, like the other layers, the second support layer is directly laminated on the multilayer film. In either case, the second support layer is fed into the laminating roller, and is laminated on the multilayer film in the same manner as the other support layers.

  Exemplary methods and materials for making thin films and laminates are disclosed in commonly assigned U.S. Pat. Nos. 5,6,7, 7 (which are hereby incorporated by reference in their entirety). Some).

  FIG. 1 is a front view of a typical surgical gown 100 worn during a medical procedure. The surgical gown 100 includes a collar 110, cuffs 120, a first tie cord 130, and a first knot attachment region 140. Also visible is a shoulder seam 150 connecting the sleeve 160 to the body portion 170. FIG. 2 is a rear view of a typical surgical gown 100 worn during a medical procedure. FIG. 2 also shows a sleeve seam 180 extending from the shoulder seam 150 to the cuff 120 used to form the sleeve 160, as well as the shoulder seam 150 connecting the sleeve 160 to the body 170. . FIG. 2 also shows a second knot 180 and a second knot attachment area 190 (not within the AAMI danger area).

  Traditional knot sealing methods are prone to damage to surgical wear layers, are easily compromised to the extent that the impermeability of the joint does not meet the acceptance criteria for AAMI Level 3 or 4 tests, or are very expensive. There was a problem that it was easy. Examples of the conventional method include point bonding by ultrasonic waves or heat, and adhesive bonding. Although the inventor does not wish to be bound by any particular theory, the conventional methods attempt to join the material through its entire thickness, which damages the material structure to a relatively high degree. I think that there is a tendency. Many surgical gowns have a membrane layer to increase the impermeability, but the membrane layer is relatively fragile, so the robust joints used in the past damage the membrane layer and increase the permeability. It tends to end up. In the case of adhesive bonding, manufacturing difficulties and costs are relatively high because adhesives are expensive, take time to apply, and have a detrimental effect on the cleanliness of the manufacturing equipment.

  As described above, the joining conditions are changed according to the material of the structure. For example, current thermoplastic polymeric materials commonly used in disposable surgical gowns and components such as ties attached to the disposable surgical gowns are typically made from polypropylene and / or polyethylene. Nonwoven fibers that are made and generally have a basis weight ranging from about 17 gsm (0.5 osy) to about 51 gsm (1.5 osy).

  The knot material is preferably a 34 gsm (1.0 osy) folded SMS material made as described above. Fibers for producing surgical gowns include, for example, random copolymer spunbonds, trilayers (Catalloy® / polyethylene / catalloy®) or “ABA” calcium carbonate filled membranes, It can be made from a spunbond / meltblown / spunbond (SMS) layer. The layers of this “SFSMS” are joined together to form a surgical gown having an SMS layer on the skin side. The spunbond layer and film have a basis weight of 7 to 34 gsm (0.2 to 1.0 osy) or more, particularly about 20.3 gsm (0.6 osy). The SMS layer has a basis weight of 17-51 gsm (0.5-1.5 osy), in particular about 25.4 gsm (0.75 osy).

  The inventor of the present application has found that by attaching a reinforcing piece to the surface on the back side of the attachment surface of the knot in the surgical gown, it is possible to provide sufficient barrier ability so that the attachment part of the knot can meet the acceptance criteria of the water resistance test. did. The reinforcing piece can be made of various materials such as a membrane, paper, and meltblown fiber, but the material needs to have water resistance of AAMI level 3 standard or higher. The reinforcing piece may also be sticky for ease of use. The reinforcing piece is, for example, a wax-treated paper commercially available under the trade name “Fastape” from Avery Dennison Specialty Tape Division of Avery Dennison, Painesville, Ohio, USA. possible. Fast Tape® paper is also tacky.

  The reinforcing piece needs to be large enough to cover the attachment area of the knot. Typically, the width is about 38.1 to 63.5 mm (1.5 to 2.5 inches), the length is about 63.5 mm to 101.6 mm (2.5 to 4 inches), and the maximum area Reinforcing pieces that are 645 square centimeters (10 square inches) will suffice.

  In addition to the reinforcement pieces described above to meet the acceptance criteria for the AAMI level 3 test, the inventor has discovered that a change in the bonding pattern is required to meet the acceptance criteria for the AAMI level 4 test. Conventional thermal bonding patterns used “male” patterns. The inventor has discovered that the use of a “female” or point-unbonded (PUB) pattern can greatly improve bonding and meet AAMI level 4 acceptance criteria. In the method of attaching the reinforcing piece according to the present invention, it is desirable that the reinforcing piece is ultrasonically bonded with a new PUB bonding pattern.

  Conventional “male” thermal point joining generally involves passing the joining fibers between a heated calendar roll and an anvil roll. Usually (but not necessarily), a pattern is formed on the surface of the calendar roll so that the entire fiber is not bonded over its entire surface. The surface of the anvil roll is usually flat. As a result, various patterns for calendar rolls have been developed for functional and aesthetic reasons. An example of a pattern is Hansen Pennings or “H & P” having a plurality of junction points and having a junction area ratio of about 30% at 200 junctions per square inch as disclosed in US Pat. Is the pattern. The H & P pattern has square dot or pin joint areas, each pin has a side dimension of 0.965 mm (0.038 inch), and the spacing between pins is 1.778 mm (0.070 inch). The junction depth is 0.584 mm (0.023 inch). The bonding area ratio of the obtained pattern is about 29.5%. Another typical point bond pattern is the extended Hansen Pennings or “EHP” bond pattern, with a 0.94 mm (0.037 inch) side dimension and a 2.464 mm (0.097 inch) pin-to-pin spacing. And a square pin having a junction depth of 0.991 mm (0.039 inches) to create a 15% junction area ratio. Another typical point bonding pattern is the designated “714” with square pin bonding areas, each pin having a side dimension of 5.842 mm (0.023 inches), 1.575 mm (0.062 mm). Inch) pin spacing and a junction depth of 0.833 mm (0.033 inch).

  “Point unbonded” or “PUB” bonding means that the fiber pattern has continuous bonding regions that define a plurality of discrete unbonded regions. The fibers or single fibers in the plurality of non-bonded regions are dimensionally stabilized by the continuous bonding regions surrounding or surrounding each non-bonded region, the non-bonded regions being fibers or non-bonded regions in the non-bonded regions Specially designed to provide space between single fibers. Suitable methods for forming the non-bonded pattern nonwoven material of the present invention include providing a nonwoven fiber or web, and first and second calendar rolls, at least one of which The first and second calender rolls having a bonding pattern comprising a continuous pattern of land areas that are heated and that define a plurality of discrete openings, gaps or holes on the outermost surface thereof, disposed opposite each other Defining a nip therebetween, and passing the nonwoven fibers or web through a nip formed between the rolls. Each opening defined by the continuous land area in the roll has a plurality of discrete portions where the fibers or single fibers of the web are not substantially or completely joined to at least one surface of the nonwoven fibers or webs. A typical non-bonded region is formed. In other words, the continuous pattern of land areas in the roll forms a discontinuous pattern of bonded areas defining a plurality of discrete non-bonded areas on at least one surface of the nonwoven fiber or web. An example of the point non-bonding pattern is disclosed in Patent Document 19.

  The bonding area ratio used in the present invention is about 20-30%, preferably about 25%. An exemplary PUB pattern used to meet the AAMI level 4 acceptance criteria provides an open space of 0.762 mm (0.030 inches) and 1.016 mm (. Characterized by a plurality of unbonded areas with a seal line of 0.254 mm (0.010 inch) every 040 inches).

  Joining “temperature zone” or conditions under which the joining takes place will result in the formation of pores in the fiber, ie, conditions that do not pass the AAMI Level 3 and 4 test, and conditions that allow the string to be easily removed from the surgical gown after joining. Between. The following examples are joined using a Branson 900 series ultrasonic welder available from Branson Ultrasonics Corporation of Danbury, Connecticut, USA. The Branson 900 is controlled by setting the pressure and the welding or contact time between the junction and the material. The pressure and contact time used in the present invention are 345 to 621 kPa (50 to 90 psi) and 0.05 to 0.25 seconds, respectively, more specifically 414 to 517 kPa (60 to 75 psi) and 0. 1 to 0.2 seconds, and even more particularly about 448 kPa (65 psi) and about 0.18 seconds.

  The following example shows that the surgical gown can meet the acceptance criteria of the AAMI level 3 test by adding a reinforcing piece, and the surgical gown meets the acceptance criteria of the AAMI level 4 test by adding a PUB joint. Show that you can.

  ≪Test method≫

  ASTM Test Method 127-1998: This test was performed using a hydrostatic pressure tester, a device commercially available from Alfred Suter Co. of Ramsey, NJ (PO Box 350, Ramsey NJ 07445-0350). use. Another but similar tester is commercially available from Schmid Corp. of Spartanburg, SC (140-B Venture Blvd, Spartanburg, SC 29301).

  The Sutter device is an inverted conical sump and is equipped with a coaxial ring fastener for securing a fabric specimen directly under the bottom of the sump. The apparatus causes water to flow from above the test piece to a region having a diameter of 114 mm at a pressurization speed of 10.0 ± 0.5 mm / second by a hydraulic head. In order to allow the operator to confirm that water droplets have penetrated the test piece, a mirror is installed below the test piece. A valve is provided to exhaust the air in the water reservoir.

  At least three fiber specimens are taken diagonally in the width direction of the fiber being tested. The specimen is cut at least 200 × 200 mm so that it can be properly fixed. The specimen is conditioned at 21 ° C. and 65% relative humidity for at least 4 hours prior to testing. The test piece is fixed in the apparatus so that the test surface is in contact with 21 ° C. water. The device is driven and water is allowed to flow at a defined rate. Water droplets appearing within 3 mm from the edge of the specimen are ignored. And the pressure which a water droplet osmose | permeates the said fiber is recorded in three different places. The pressure is reported as the water level (mm) on the fiber. The average of each specimen is calculated. In order to pass ASTM test method 127-1998, it is necessary to reach the acceptance standard of AAMI level 3 standard, 50 cm.

  ASTM tests 1670 and 1671-b, method A. These tests are identical except that 1670 uses artificial blood and 1671 uses Phi-X174 bacteriophage.

  This test uses a penetration test cell available from the Wilson Road Machine Shop, Maryland, USA. The cell has a capacity of about 60 ml. In the test cell, the test piece functions as a partition for separating the test liquid from the observation side of the penetration test cell. The cell includes an annular flange cover having an opening that enables visual observation of the test piece, and a transparent cover. The cell body has an upper port for filling the test liquid and a discharge valve for discharging the test liquid. The penetration test cell is further defined in Test Method F903.

  The outermost layer of test specimen fibers placed in the penetration test cell faces the back (solid flange) portion of the cell where the test liquid is placed. The cell is filled with test liquid through the upper port and observed for 5 minutes. Thereafter, air is supplied to the upper port and the specimen is maintained at a pressure of 13.8 kPa (2 psig) for about 1 minute, after which the pressure is released. If no liquid penetration is observed, the sample is left for 54 minutes and then observed. If the test liquid is a bacteriophage, it cannot be observed with the naked eye, so testing and analysis of the passage of the test liquid is performed at 35-37 ° C., 6-18, using 0.5 ml sample size test liquid placed on agar. Done for hours.

  Examples of materials

  Kimberly Clark Ultra Surgical Gown

  The Ultra® impervious surgical gown from Kimberley Clark is made from 51 gsm (1.5 osy) polypropylene SMS and has reinforcements on the sleeve and chest (AAMI “Dangerous Area”). The reinforcing material is a polyethylene film having a thickness of 0.0254 mm (1 mil). The sleeves are joined with the membranes and turned over so that the SMS is closest to the skin.

  Micro Cool Surgical Gown made by Kimberly Clark

  MicroCool® surgical gowns from Kimberly Clark Corp. consist of random copolymer spunbond, trilayer (Cataloy® / Polyethylene / Cataloy®) calcium carbonate filled membrane, polypropylene span Made from a bond / meltblown / spunbond (SMS) layer. The layers of this “SFSMS” are joined together to create a surgical gown having an SMS layer on the skin side. The outermost layer, random copolymer spunbond, is a 2.5 weight percent ethylene propylene copolymer known as R532-35R available from Dow Chemical Company, Midland, Michigan, USA Made from. The random copolymer spunbond is not treated at all. Each of the spunbond layers and films has a basis weight of 20.3 gsm (0.6 osy). The SMS layer has a basis weight of 25.4 gsm (0.75 osy).

  Knot

  The knot to be joined to the surgical gown is a 34 gsm (1.0 osy) folded SMS material. The SMS material is folded once for two-layer fibers and folded twice for three-layer fibers. The outer layer (spunbond) is made from 2.5 weight percent ethylene propylene copolymer known as R532-35R available from Dow Chemical Company of Midland, Michigan, USA, to reduce surface tension In order to achieve this, it is treated with an antistatic agent and a fluorochemical. Prior to attaching to the surgical gown, additional components are connected near the end of the knot to form a “Y” shaped end that joins the surgical gown at the top ends of Y. The Y-shaped end is flattened on the surgical gown to join the surgical gown at two points located near the Y trunk in the Y branch.

  Example 1: Basic ultra surgical wear

  Double-folded SMS knots were joined to an Ultra® surgical gown using a point joining pattern with a welding time of 0.175 seconds and a pressure of 448 kPa (65 psi). The bonded area was tested according to AATCC test method 127-1998. All 12 samples did not pass.

  Example 2: Ultra surgical wear using fast tape and PUB bonding pattern

  Double-folded SMS knots were bonded to an Ultra® surgical gown using a PUB bonding pattern with a welding time of 0.175 seconds and a pressure of 448 kPa (65 psi). Prior to bonding, a piece of Fast Tape® adhesive tape measuring 63.5 mm × 101.6 mm (2.5 inches × 4 inches) is placed under the bonded portion of the knot. The bonded area was tested according to AATCC test method 127-1998. All 12 samples passed.

  The present invention has been described in general and in detail by way of example. It will be appreciated by persons skilled in the art that the present invention is not limited by the specific embodiments disclosed. It will be apparent that various changes may be made in form and detail without departing from the spirit and scope of the invention as defined in the appended claims. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

Claims (18)

A surgical gown having an AAMI dangerous area, wherein a knot is joined to the surgical gown at a joint provided in the dangerous area,
A surgical gown characterized in that the joint meets the acceptance criteria of AATCC test method 127-1998. The surgical gown according to claim 1,
The surgical gown characterized by having a reinforcing piece on the back surface of the attachment surface of the knot in the surgical gown. The surgical gown according to claim 2,
The surgical gown characterized in that the maximum area of the reinforcing piece is 645.16 square centimeters. The surgical gown according to claim 1,
A surgical gown characterized in that the joint portion is formed by a PUB pattern. The surgical gown according to claim 4,
A surgical gown characterized in that the joint has a joint area ratio of about 20 to 30%. The surgical gown according to claim 5,
A surgical gown characterized in that the joint has a joint area ratio of about 25%. Surgical clothes,
With a knot,
A knot joining region for joining the knot to the surgical gown, and a reinforcing piece arranged on a back surface of the knot joining region in the surgical gown,
A surgical gown characterized in that the knot-joining region satisfies the acceptance criteria of ASTM test 1671-b. The surgical gown according to claim 7,
A surgical gown comprising a polyolefin ultrafine fiber layer. The surgical gown according to claim 8, wherein
The surgical gown characterized in that the ultrafine fiber layer is a spunbond layer made of polyethylene, polypropylene, or ethylene-propylene copolymer. The surgical gown according to claim 7,
A surgical gown further comprising a filling membrane. The surgical gown according to claim 10,
A surgical gown wherein the knot has an outer layer treated with an antistatic agent and a fluorochemical to reduce surface tension. The surgical gown according to claim 7,
A surgical gown characterized in that the joining is performed at a pressure of 345 to 621 kPa and a welding time of 0.05 to 0.25 seconds. A surgical gown according to claim 12,
A surgical gown characterized in that the joining is performed at a pressure of 414 to 517 kPa and a welding time of 0.1 to 0.2 seconds. A surgical gown according to claim 12,
A surgical gown wherein the joining is performed at a pressure of about 448 kPa and a welding time of about 0.18 seconds. A surgical gown having an AAMI danger area on a sleeve and a chest, wherein a knot is joined to the surgical gown at a knot joint provided in the danger area,
The joining is performed using a PUB pattern having a joint area ratio of about 25% at a pressure of about 448 kPa and a welding time of about 0.18 seconds;
The surgical gown is made of polypropylene SMS and has a reinforcing portion made of a polyethylene film in the dangerous area. The surgical gown according to claim 15, wherein
A surgical gown characterized in that the knot-joining region satisfies the acceptance criteria of ASTM test 1671-b. A method for joining a knot to a surgical gown,
Placing the knot on the surgical gown;
Thermally bonding the knot to the surgical gown with a PUB pattern in the knot tying region;
A method in which the knot-joining region satisfies the acceptance criteria of AATCC test method 127-1998. A method for joining a knot to a surgical gown,
Placing the knot on the surgical gown;
Arranging a reinforcing piece on the back surface of the attachment surface of the knot in the surgical gown;
Thermally bonding the knot to the surgical gown with a PUB pattern in the knot tying region;
A method wherein the knot joining region satisfies the acceptance criteria of ASTM test 1671-b.

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