TW201016199A - Medical tape and medical products made therefrom - Google Patents

Abstract

The present invention provides a medical tape, which includes: a Metallocene-PP copolymer nonwoven backing-lining, and a medical pressure sensitive adhesive coated on at least one face of the above-mentioned backing-lining. The present invention also provides a medical product, which includes medicament and the invented medical tape. The invention can be used to produce medical dressings, medical pastes, ok bonds, etc. and has the advantages of easy in processing, good resiliency, and good liquid barrier properties.

Description

201016199 VI. Description of the invention: [Technical field to which the invention belongs] 5 10 15 ❹ 20 This is a medical tape and medical products made thereof, especially a non-woven fabric as a backing material. Medical tapes and medical articles made therefrom, such as medical enamels, plasters, and band-aids. [Prior Art] In the field of health care and personal care, non-woven tapes are widely used as raw materials for non-woven tapes, including rayon, polyester, rayon, due to their superiority, low price, and convenient addition. Polyacetate mixed with β and polypropylene. For example, the patent case discloses a medical breathable tape, 2 includes a wrap-around cylinder, the non-woven surface is a medical primer, and the other side of the non-woven fabric is a binder. There is a medical primer between the adhesive and the non-woven fabric. The adhesive is made of medical grade acrylic pressure sensitive adhesive, and the non-woven fabric is made of conventional Ziegler-Natta polypropylene non-woven fabric. However, the tape made of the above raw materials has the following two common disadvantages: (1) lack of elasticity, not suitable for use in joints such as joints; (2) poor barrier to liquid, and thus cannot prevent the influence of external liquid on the application site. Or the infiltration of the internal drug solution. To this end, there have been some inventions that seek to solve some of the above problems. For example, European Patent EP 1097185 describes a metallocene-catalyzed polyethylene (copolymer of ethylene and alpha-diuretic hydrocarbon) non-woven fabrics which can be used as a backing material for dressings, plasters and tapes. However, in general, polyethylene particles have high crystallinity and are difficult to process, and in particular, metallocene polyethylene cannot be produced by a spunbond method. Even a small number of commercially available polyethylene nonwoven fabrics made by flashing are too tough and inelastic, making them difficult to stretch. Therefore, there is a need to develop a medical tape which is easy to process, has good elasticity and liquid barrier properties, and a medical article made thereof, such as a non-woven cloth tape. SUMMARY OF THE INVENTION φ An object of the present invention is to provide a medical tape which is easy to process, has good elasticity and liquid barrier properties. 10 As an aspect of the invention, there is provided a medical tape comprising: (1) a metallocene polypropylene copolymer non-woven backing; and (2) a medical pressure applied to at least one side of the backing Min Sheng. As another aspect of the present invention, there is provided a medical article comprising the above medical tape and medicament. According to certain embodiments of the present invention, the medical tape of the present invention and articles made therefrom are more flexible than conventional tapes and articles, providing a more comfortable fit for the skin and Applicable to f-joint joints and any active parts; the backing is highly waterproof, can completely prevent the infiltration of external moisture, and can reduce the leakage of internal liquids, especially for short-term barriers. [Embodiment] The present invention will be described in more detail below with reference to the accompanying drawings and examples. It should be noted that these descriptions and examples are intended to facilitate the invention and may include a dressing, paste 201016199 solution, and are not limiting of the invention. All parts, percentages, ratios ‘ Unless otherwise specified, G, etc., all contain 1 by weight. The present invention provides a medical tape comprising: - (〇3 metal polypropylene copolymer nonwoven backing and w (four) sensitive glue of the invention H on at least the face of the backing. and a medicament. The above-mentioned medical tape includes the term "article" as used in the present invention such as a sticker and a band-aid, etc. According to some embodiments, the metallocene polypropylene copolymer nonwoven fabric backing used in the tape of the present invention has the following characteristics: It is 2 (μ(9) g/m2; thickness is 0.05-0.4 mm; its longitudinal and transverse elastic recovery rate is above (10); the hydrostatic pressure value of non-woven fabric is not less than 25 cm water column. In the present invention, the term 'metallocene polypropylene copolymer' It refers to a copolymer of poly(tetra) obtained by polymerization of a mother metal with a metallocene catalyst and at least one other α-dilute hydrocarbon. In the present invention, the alpha-smoke which is suitable for copolymerization with propylene includes but is not limited to: ethylene, butyl Dilute, pentene, hexene, heptene, octene, decene, decene, decaene, and dodecene. According to certain embodiments, the average molecular weight of the metallocene polypropylene copolymer suitable for use in the present invention is 150000-250000, molecular weight 5, the melt flow rate is 〇.5-35g/10min, crystallinity is 3-30%, tensile strength is 15 2 27 6 Μρ &, elongation is 100-1500% 'elastic recovery rate is 8〇_97 %, from _2 〇 to 30 ° C, T „40-160 ° C. According to certain preferred embodiments, the mer units of propylene units in the metallocene polypropylene copolymer of the invention of 2010 5 199 ( The number of parts is not less than 65%, more preferably not less than 70%. 5 ❹ 10 15 20 For metallocene-catalyzed polyolefin nonwovens, polypropylene materials have the following advantages over polyethylene materials: (丨) has better tensile strength and wear resistance; (2) the probability of delamination is greatly reduced; (3) processing window (temperature range) is wide. Metallocene catalysts for olefin polymerization are usually made of metallocene compounds. a catalytic system composed of a main catalyst and a Lewis acid as a cocatalyst. The metallocene compound refers to an organometallic coordination compound formed by a transition metal atom as a ring-ring coordination element. When the metallocene is used as a polyolefin catalyst due to a special structure, Has a uniform distribution of comonomers and accurate control The advantages of the microscopic stereochemical structure of olefins and the ability to obtain copolymers with low crystallinity. These characteristics of metallocene catalysts can be used to obtain polyolefin elastomers with good elasticity. Metallocene polyolefin elastomers have low price and high elasticity. It is compatible with other materials. The catalytic system of metallocene catalyst used in the preparation of polypropylene elastomers includes bridged metallocene catalyst system, non-bridged metal catalyst system, single metallocene catalyst system and metallocene/boride catalyst system. For example, the Vistamaxx series of specialty propylene-ethylene copolymer elastomers from Exx〇nM〇bil, which can account for more than 65% of the propylene, are preferred for use in certain embodiments of the present invention. For metallocene polypropylene copolymer elastomers, see, for example, U.S. Patent 6,472,172 B1. U.S. Patent 6,476,172 B1 discloses elastomeric fibers composed of metallocene-catalyzed isotactic propylene and alpha-olefin random copolymers and their processes. For metallocene polypropylene copolymer elastomers, for example, see also:

ChienJ et al. (Polymer Chemsitry, 1991, 28(1 1): 1603-1607) using rac-anti-Et(Me4C5)(Ind)TiCl2, 5 rac-anti-Et(Me4C5)(Ind)TiCl2 / rac-syn- a thermoplastic PP elastomer having a crystalline-amorphous stereo multi-block structure is synthesized by a molar mixture of Et (Me4C5)(Ind)TiCl2 and a rac-anti-Et (Me4C5) (Ind) TiMe2 asymmetric bridged metallocene catalyst; Climbing Gauthier WJ et al. (Macromolecules, 1995, 28(11): 10 3779-3786) using Me2C (Cp)(Ind)TiCl2, Me2C (Cp)(Ind)ZrCl2,

Synthesis of PP elastomer by Me2C (Cp)(Ind)HfCl2, Me2Si(Cp)(Ind)ZrCl2 and Me2Si(Cp)(Ind)HfCl2 metallocene catalyst, wherein Cp is a metallocene;

Resconi L et al. (Chemical Reviews, 2000, 100(4): 15 1253-1345) synthesized Me2Si(Flu)2 ZrCl2Me2Si(Flu)2ZrMe2C2v symmetric palm-free bridged metallocene catalyst to synthesize average molecular weight (Mw) up to φ 100,000 to 400,000 fully amorphous PP elastomers with good elasticity and optical properties;

Coates G (Chemical Reivews, 2000, 100(4): 1223-1252) using (2-PhInd)2ZrCl2, (2-PhInd)2HfCl2, (2-PhInd)2Zr(CH2Ph)2 20 and (2-PhInd)2Hf (CH2Ph)2 bridgeless viscoal metallocene catalyst to synthesize PP elastomer;

Collete JW et al. (Macromolecules, 1989, 22(10): 385 1-3858) synthesized PP elastomers using an MR4 metallocene catalyst supported on alumina, which is titanium, erbium or yttrium; R is CH2Ph, Me3CH2 Or PhCMe2CH2; 7 25 201016199

Tullock C W et al (Journal of Polymer Science. Part A.

Polymer Chemistry, 1989, 27(9): 3063-3081) A stereomultiblock PP elastomer was synthesized using a MAr2 [e.g., Ti(C6H5CH3)2] metallocene catalyst supported on alumina. 5 The "metallocene polypropylene copolymer" can be easily made into a nonwoven fabric by a known nonwoven fabric production technique. It is especially suitable for the non-woven fabric of the present invention, for example, Marnix elastic non-woven fabric produced by the spunbonding method (National Bridge Industrial Co., Ltd., Guoqiao Industrial Park, Guanlan Town, Bao'an District, Shenzhen) "Marnix is a brand new non-woven 10 cloth product. 'Using a spunbond process, the special elastomer Vistamaxx (-metallocene propylene-acetonitrile copolymer) produced by ExxonMobil Chemical Co., Ltd. was used as the main raw material. It combines the advantages of non-woven fabric and elastic cloth. It is soft and elastic, with an elongation of 200-500% and an elastic recovery rate of over 90%. Vistamaxx has a molecular weight of 150,000 to 250,000, a molecular weight distribution of $2.5, a melt flow rate of 0.5-35 g/10 min, a crystallinity of 3-30%, a tensile strength of 15.2-27.6 MPa, and an elongation of 100-1500%. The elastic recovery rate is 80-97%, the Tg is -20 to -30 °C, and the 1\„ is 40-160. Vista. The molar content of propylene in Vistamaxx accounts for more than 65%. The hydrostatic pressure can be as high as 25-70cm, depending on the specific thickness of the non-woven fabric. Generally, the thicker the 20-woven fabric, the higher the hydrostatic pressure value. According to some embodiments, the medical pressure-sensitive adhesive used in the adhesive tape of the present invention is acrylic. Ester or rubber based pressure sensitive adhesive. According to certain embodiments, the coated dry glue has a thickness of from 10 to 100 g/m 2. 8 201016199 According to certain embodiments, the adhesive force of the pressure sensitive adhesive suitable for use in the present invention meets the following requirements: Using a 25 micron thick PET film as a backing to test its adhesion to the steel plate, the pressure of the pressure sensitive # should be greater than that of the 〇. This is 5 10 15 because the non-woven fabric used in the invention is waterproof and The weight of the non-woven fabric is increased, that is, the thickness is increased, and the waterproofness is stronger. Therefore, the kicking agent needs to be larger than The minimum steel plate peeling force of .lN/mm can be well combined with the non-woven fabric surface to make the tape. In addition, under the premise of the same coating weight, the surface of the non-woven fabric is sorted from easy to difficult to solvent type. Synthetic Rubber Adhesives > Solvent-Based Acrylate Adhesives> Waterborne Acrylate Adhesives According to certain embodiments, metallocene polypropylene nonwovens can be surface treated to modify the surface properties of the fabric prior to use, for example The wettability is improved to improve the interface bonding property with the adhesive. Known surface treatment methods can be used in the present invention. Examples include, but are not limited to, corona treatment, plasma treatment, flame treatment, etc. The present invention can be carried out by the following processes: The pressure sensitive knee water is coated on the release paper, dried in an oven, and then combined with the non-woven fabric backing I (4) to assist the composite, (4) the rubber layer to the non-woven fabric. The invention can be used for production in addition to the production of tape. Products such as dressings, plasters and band-aids. However, it should be understood that the present invention can also be used in industrial applications where elastic waterproof knee straps are required, such as industrial tapes. It is used in the field of communication electronics, etc. ^ This invention is the first to use metallocene polypropylene copolymer non-woven fabric as a tape backing, with medical grade pressure sensitive adhesive, medical tape obtained and medical products made from the same. It has the advantages of elasticity, water resistance and comfortable touch, 20 201016199 and the process is simple, more suitable for human skin, and the scope of application is wider. The medical article according to the invention, for example, when the tape is applied to the movable joint, the action site can be It fits completely without tightening, and the liquid does not penetrate the tape and contaminate the customer's close-fitting clothing. In addition, the patient can wash the bath normally without affecting the effect of the drug on the plaster. Example Test method:

A Elastic recovery rate test method 10 Follow the FZ/T 700〇6-2004 standard. Use universal electric pull machine (Instron 5569, Instron Company, Room 1708, Zhongchuang Building, No. 819 Nanjing West Road, Shanghai). The operation is as follows: (1) Fix a sample of 2 54cmxl〇cm on the Instron's coolness; (2) Apply the force of in on the sample, record the length of the sample at this time; (3) Start the lnstron to stretch the sample to The fixed elongation (20% elongation in the hairpin 15), stayed for 1 minute, and recorded the sample length L01 at this time; (4) Remove the pulling force and let the sample return to the natural state 'stay for 3 minutes; Φ ( 5) Apply a 1N pull force to the sample and record the sample length L〇' at this time. Measured elastic recovery rate = (L 〇丨 - L 〇 ') / ( L 〇丨 - L0) x l 〇〇〇 / 0 20 Hydrostatic pressure test method Follow IS 〇 811: 1981 1 standard. Use YG825 fabric hydrostatic pressure tester (Ningbo Textile Instrument Factory, No. 75, Sancun Road, Gaoqiao Town, Yinqiao District, Ningbo City, the water pressure rise rate is 60cm/min, and the water temperature is 20 °C (standard atmospheric pressure). As follows: (1) Cut a sample larger than l〇crnX l〇cm area, clamp it on the 25 tester as required (for the tape, the rubber surface is clamped downward); (2) Select 201016199 6〇cm/min water. (3) Press the start button water pressure to start stable and rise south 'record the non-woven surface to start the third drop of water or the pressure at the third place sees water' is the hydrostatic pressure. 5 Example 1: Tape coating ps_57E water-based acrylic acid vinegar adhesive with a dry weight of 30.0g/m2 (Xi'an Tianyun Industrial Co., Ltd., A1020 507, Maple New City, Xi'an High-tech Zone), with a single surface of 12〇g/m2 Release paper (Baoyan Industrial Technology Co., Ltd., No. 1222, Xinmiao 3rd Road, Songjiang District, Shanghai) is placed in the box 10 for drying, and under the action of the roller, the weight is 2〇g/m2 and the thickness is Marnix elastic non-woven fabric of 60μΐη (Guoqiao Industrial Co., Ltd., Bao’an District, Shenzhen The town sightseeing road Guoqiao Industrial Park) composites and transfers the rubber layer to the non-woven fabric. The peeling force of the obtained non-woven tape on the steel plate is G3un/_, the hydrostatic pressure is 31.2cm, and the elastic recovery rates in the longitudinal and transverse directions are respectively... ❶ and 15 92.38%. The obtained tape is shown in Figure 1. This transfer belt consists of two layers of structure 'from top to bottom: 1 is a metallocene polypropylene copolymer non-woven layer, 2 is a medical ❹ 压 pressure sensitive adhesive When the tape obtained in the layer is applied to the elbow joint or the knee joint, it has good compliance and comfort, does not warp, and does not affect the normal movement of the joint part, and has no tight feeling of the ordinary non-woven tape. Positive 20 is often applied for more than 7 days, and daily shower can be carried out during use (about 30 minutes each time). Example 2: Tape coated dry glue weight is 3〇.〇g/m2 PS-58E Waterborne Acrylate Adhesive 25 Agent (Xi'an Tianyun Industrial Co., Ltd., Maple New City 201016199 A1020 Room 507, Xi'an High-tech Zone) Yuke Heavy 120g/m2 Single-sided Release Paper (Baoyan Industrial Technology Co., Ltd., Songjiang, Shanghai) District, Xinmiao 3rd Road, No. 1222) Drying in an oven, and under the action of roller compactor, Marnix elastic non-woven fabric with a weight of 40g/m2 and a thickness of 117μηι (Guoqiao Industrial Co., Ltd., Guobao Industrial Park, Guanlan Town, Shenzhen Bao 5 An District) The composite adhesive layer was transferred to the non-woven fabric. The peeling force of the obtained non-woven fabric tape on the steel sheet was 0.462 N/mm, the hydrostatic pressure was 38.0 cm, and the elastic recovery rates in the longitudinal and transverse directions were 94.13% and 91.68%, respectively. ❹ 10 Example 3 : Tape coated dry adhesive with an acrylate adhesive weight of 43.8 g/m 2 (95.5/4.5 (by weight) of isooctyl acrylate-acrylic acid copolymer binder prepared according to RE24960 (Ulrich)) 120g/m2 single-sided release paper (Baoyan Industrial Technology Co., Ltd., No. 1222, Xinmiao 3rd Road, Songjiang District, Shanghai), 15 is placed in an oven for drying, and the weight is 60g under the action of the roller Marmix elastic non-woven fabric with /m2 and thickness of 180μιη (Guoqiao Industrial Co., Ltd., deep φ Guoqiao Industrial Park, Guanlan Town, Guan'an Town, Bao'an District, Shenzhen) is compounded and transferred to non-woven fabric. The peeling force of the obtained non-woven tape on the steel sheet was 240240 N/mm, the hydrostatic pressure was 57.0 cm, and the elastic recovery rates in the longitudinal and transverse directions were 93.55% 20 and 90.82%, respectively. Example 4: Tape coated dry rubber with a weight of 38.4 g/m2 of synthetic rubber adhesive (containing about 25% Kraton 1117 (Kraton LLC, Houston, Texas) polystyrene-isoprene 25-styrene Copolymer, about 25% aromatic modified C5 resin tackifier, about 12 201016199 5 φ 10 15 20 49% toluene / heptane mixed solvent and about 0.1% antioxidant) in a weight of 120g / m2 Surface release paper (Baoyan Industrial Technology Co., Ltd., No. 1222, Xinmiao 3rd Road, Songjiang District, Shanghai), dried in an oven, and with a weight of 80g/m2 and a thickness of 245μπι under the action of a roller. The Marnix elastic non-woven fabric (Guoqiao Industrial Co., Ltd., Guoqiao Industrial Park, Guanlan Town, Guanlan Town, Bao'an District, Shenzhen) is compounded and transferred to the non-woven fabric. The obtained non-woven tape had a peeling force of 1.14 lN/mm for the steel plate, a hydrostatic pressure of 64.5 cm, and elastic recovery rates of longitudinal and transverse directions of 93.00% and 88.02%, respectively. Example 5: Tape coated dry rubber with a weight of 49.8 g/m2 of synthetic rubber adhesive (containing about 25% of Kraton 1117 (Kraton LLC, Houston, Texas) polystyrene-isoprene-styrene copolymerization , about 25% aromatic modified C5 resin tackifier, about 49% toluene / heptane mixed solvent and about 0.1% antioxidant))))))))) on a single side with a weight of 120g / m2 Release paper (Baoyan Industrial Technology Co., Ltd., No. 1222, Xinmiao 3rd Road, Songjiang District, Shanghai), put it in an oven for drying, and under the action of roller compactor, the weight is l〇〇g/m2 and the thickness The 308μιη Marnix elastic non-woven fabric (Guoqiao Industrial Co., Ltd., Guoqiao Industrial Park, Guanlan Town, Bao'an District, Shenzhen) is compounded and transferred to the non-woven fabric. The obtained non-woven tape had a peeling force of 1.481 N/mm for the steel sheet and a static water pressure of 68.9 cm, and the elastic recovery rates of the longitudinal and transverse directions were 91.00% and 87.67%, respectively. Example 6: Tape-based dressing The materials used in this example are as follows: 13 201016199 Border paper (gram weight is 125g/m2, Naiheng Paper Co., Ltd., No. 7 Liantan Road, North Section, Eastern District, Guangzhou Economic Development Zone); Elastic non-woven fabric, adhesive, cotton pad (Huilong Sanitary Materials Co., Ltd., Xinhong Village, Tangzhen Town, Pudong New Area, Shanghai); and 5 release paper (gram weight is 1 〇〇g/m2 'Baoyan Industrial Technology Co., Ltd. , No. 1222, Xinmiao 3rd Road, Songjiang District, Shanghai, China). The dressing made of elastic waterproof non-woven tape is shown in Figure 2 (left: cut φ face, right: front view). The dressing structure comprises the following five-layer structure, from top to bottom: 3 is the border paper layer (including the tangent 8), 4 is the 4〇g/m2 elastic 10 non-woven layer, and 5 is 30g/m2 PS-57E water-based acrylic. The ester adhesive layer, 6 is a cotton mat layer, and 7 is a l〇〇g/m2 single-sided release paper layer. The process engineering is as follows: (1) coating the non-woven tape; (2) placing it on the unwinding roll of the die-cutting machine; (3) cutting the shape of the border paper and non-woven fabric at a rate of 4 m/min The surface is thermally composited under a heat of 2〇〇〇c in a 15' and peeled off the original release paper; (4) a cotton pad is added on the rubber surface, and the product release paper is attached; (5) the finished die-cutting Into the final shape. ® The resulting dressing has a frame release force of 3.2g/mm, a rubber release force of 1.2g/mm, and a peeling force of the rubber facing the steel plate of 372.372N/mm. 20 Example 7: Tape-based stickers The materials used in this embodiment are as follows: elastic non-woven fabric, adhesive, cotton pad (Huilong Sanitary Materials Co., Ltd., Xinhong Village, Tangzhen Town, Pudong New Area, Shanghai); Type paper (gram weight is 130g/m2, Baoyan Industrial Technology Co., Ltd., No. 1222, Xinmiao 3rd Road, Songjiang District, Shanghai 25). 201016199 The paste made of elastic waterproof non-woven tape is shown in Figure 3 (left: wear side view, right front view). The paste structure comprises the following four layers, from top to bottom: 9 is 80g/m2 elastic non-woven layer, 1〇 is 30g/m2 AK2247 synthetic rubber adhesive 5 agent '6 is cotton pad, 11 is 130g/m2 Single-sided release paper layer. The process engineering is as follows: (1) coating the non-woven tape; (2) placing it on the unwinding roller of the die-cutting machine; (3) peeling off the original release paper; (4) adding a cotton pad on the rubber surface, And attach the product release paper; (5) the finished product is cut into the final shape. The release force of the obtained paste was 〇.7 g/mm, and the peeling force of the rubber facing the steel plate was 10 1.1 ΙΟΝ/mm. Example 8: Tape-based band-aid The materials used in this embodiment are as follows: Border paper (gram weight is 125g/m2, Naiheng Paper Co., Ltd., No. 7 Liantan Road, North Section, East District, Guangzhou Economic Development Zone, Guangzhou); Elastic non-woven fabric, adhesive, cotton pad (Huilong Sanitary Materials Co., Ltd., Xinhong Village, Tangzhen Town, Pudong New Area, Shanghai); and release paper (gram weight is 100g/m2' Baoyan Industrial Technology Co., Ltd., Shanghai No. 1222, Xinmiao 3rd Road, Songjiang District). 20 A band-aid made of elastic waterproof non-woven tape is shown in Figure 4 (left: cross-section; right: front view). The band-aid structure comprises the following five layers, from top to bottom: 3 is the border paper layer (including the tangent 8), 4 is the 4〇§/1112 elastic non-woven layer, and 5 is the 30g/m2 PS-57E water-based acrylate adhesive. The agent layer, 6 is a cotton mat layer '7 is a l〇〇g/m2 single-sided release paper layer. The process engineering is as follows: (1) 25 coating to obtain a non-woven tape; (2) placing it on the unwinding roller of the die-cutting machine; 15 201016199 (3) cutting the shape of the border paper at a rate of 4 m/mm The surface of the non-woven fabric is thermally compounded under the action of a hot roller at 200 ° C, and the original release paper is peeled off; (4) a cotton pad is added on the rubber surface, and a release paper is attached; (5) the finished product is cut into a final shape. . 5 ❹ 10 15 The band-aid force of the band-aid of the band-aid is 3. 〇g/mm, the release force of the rubber surface is l.lg/mm, and the peeling force of the rubber facing the steel plate is 〇3〇1N/mm. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view of a non-woven single-sided tape according to an embodiment of the present invention. Fig. 2 is a schematic view showing a nonwoven fabric tape used as a dressing according to an embodiment of the present invention (left: sectional view; right: front view). Fig. 3 is a schematic view showing the use of an elastic waterproof non-woven tape as a paste (left: cross-sectional view; right: front view). Figure 4 is a schematic view of a flexible waterproof non-woven fabric used as a band-aid (left: cross-sectional view; right: front view). [Main component symbol description] 1 metallocene polypropylene copolymer non-woven layer 2 medical pressure sensitive adhesive layer 3 border paper layer (including tangent 8) 4 40g/m2 elastic non-woven layer 5 30g/m2 PS-57E waterborne acrylate adhesive Agent layer 6 cotton pad layer 20 201016199

7 100g/m2 single-sided release paper layer 9 80g/m2 elastic non-woven fabric layer 1 0 30g/m2 AK2247 synthetic rubber adhesive 1 1 130g/m2 single-sided release paper layer 17

Claims (1)

201016199 VII. Patent Application Range: 1. A medical tape comprising: (1) a metallocene polypropylene copolymer nonwoven backing; and (2) medical pressure sensitive applied to at least one side of the backing gum. 5 # 10 15 ❹ 2. The medical tape according to claim 1, wherein the non-woven backing has the following characteristics: a weight of 20-100 g/m2; a thickness of 0.05-0.4 mm; a hydrostatic pressure of the non-woven fabric The value is not less than 25 cm water column. 3. The medical tape of claim 2, wherein the non-woven backing has a longitudinal and lateral elastic recovery rate of more than 85%. 4. The medical tape according to claim 1, wherein the polypropylene has an average molecular weight of 150,000 to 250,000, a molecular weight distribution of 2.5, a melt flow rate of 5.5 to 35 g/10 min, and a crystallinity of 3 to 30. %, tensile strength is 15·2·27.6 MPa, elongation is 100-1500%, elastic recovery is 8〇_97% '1 is -20 to -30 °C, 1\„ is 40-160. 5. The medical tape of claim 1, wherein the propylene unit in the polypropylene has a molar fraction of 65% or more. 6. The medical tape according to claim 1 of the patent application, The non-woven fabric prepared by the spunbonding method, wherein the polypropylene non-woven fabric is treated by a corona treatment, a plasma treatment, and a flame treatment surface treatment method. 8. A medical article comprising a medical tape and a medicament according to any one of claims 1 to 7 wherein the article of claim 8 is the product of claim 8 wherein the article It is in the form of a dressing, plaster or band-aid. ❹ 19