High-elasticity high-strength medical adhesive tape and preparation method thereof

Abstract

The invention discloses a high-elasticity and high-strength medical adhesive tape and a preparation method thereof.The preparation method comprises the steps that polyurethane particles, polyester particles and polypropylene particles are proportionally added into a stirrer to be stirred and mixed, then the mixed particles are dried and then added into a melt-blowing machine to be subjected to melt spinning, and non-woven fabric is obtained; coating a release material with an adhesive, compounding the release material with the obtained non-woven fabric, rolling, and slitting to obtain the high-elasticity and high-strength medical adhesive tape. The preparation method is simple in process, and compared with other medical adhesive tapes, the prepared high-elasticity and high-strength medical adhesive tape has the advantages of being waterproof, breathable, larger in elasticity and strength grade range, wider in application, simple in preparation process and higher in efficiency.

Description

Technical Field

[0001] The invention relates to the field of medical tapes, and in particular to a high-elasticity and high-strength medical tape and a preparation method thereof. Background Art

[0002] Medical tape is a product used for fixing dressings, catheters, etc. Medical tapes are divided into textile fabrics, non-woven fabrics, films, foams, etc. according to the material. Compared with textile fabric tapes, film tapes and foam tapes, non-woven medical tapes are the current trend of medical tape development due to their simple manufacturing process and high efficiency. However, due to the limitations of materials and manufacturing processes, existing non-woven medical tapes have the problem of single performance. For example, some tapes are waterproof and breathable, but have low strength and elasticity, and some tapes have high strength, but poor elasticity, waterproofness and breathability. Therefore, the development of a multifunctional medical tape with high strength, elasticity, waterproofness and breathability is an urgent problem to be solved in this field. Summary of the invention

[0003] The purpose of the present invention is to provide a high-elasticity and high-strength medical adhesive tape and a preparation method thereof.

[0004] The technical solution adopted by the present invention is:

[0005] A high-elasticity and high-strength medical tape, characterized in that it comprises a non-woven fabric layer and an adhesive layer; the non-woven fabric layer is made by mixing polyurethane particles, polyester particles and polypropylene particles in proportion and then through a melt-blowing process.

[0006] Furthermore, the polyurethane particles are aromatic polyurethane particles. Furthermore, the raw material of the aromatic polyurethane includes toluene diisocyanate.

[0007] Furthermore, the polyester particles are polyvinyl acetate particles.

[0008] Furthermore, the polypropylene particles are copolymerized polypropylene particles.

[0009] Furthermore, the mass ratio of the polyurethane particles, the polyester particles and the polypropylene particles is (80-95):(1-10):(1-10).

[0010] The method for preparing any one of the above-mentioned high-elasticity and high-strength medical tapes comprises the following steps:

[0011] (1) adding polyurethane particles, polyester particles and polypropylene particles in a proportion into a mixer and stirring and mixing them, then drying the mixed particles and adding them into a melt-blowing machine for melt spinning to obtain a non-woven fabric;

[0012] (2) Then, the adhesive is coated on the release material, and then compounded with the non-woven fabric obtained in step (1), and rolled and slit to obtain a high-elasticity and high-strength medical tape.

[0013] Furthermore, in step (1), the drying temperature is 50-150° C., the melt spinning temperature is 150-280° C., and the spinning pressure is 0.5-2.0 MPa.

[0014] Furthermore, in step (2), the adhesive is a solid adhesive or a liquid adhesive.

[0015] Furthermore, in step (2), the release material is one of release paper and release film.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] (1) The product has excellent strength and elasticity. The non-woven fabric is prepared by blending polyurethane particles, polyester particles and polypropylene particles. Polyurethane gives the product good elasticity, polypropylene gives the product high strength, and polyester particles have relatively good elasticity and strength. Therefore, the strength of the prepared tape is above 25N / 2.5cm and the elasticity is above 200%. The products on the market generally have a strength of 9-18N / 2.5cm and an elasticity of 120-180%.

[0018] (2) The product has high air permeability. By adopting the non-woven fabric production process and spinning molding, tiny micropores are formed between the filaments, giving the product good air permeability. The water vapor permeability of the prepared product is 3000g / m 2 .d or above, while the products on the market are generally 1500~2500g / m 2 .d.

[0019] (3) Good waterproofness. Since polyurethane, polyester and polypropylene are waterproof, and the spinning process is used to control the pore size, they can effectively prevent the passage of water droplets and have good waterproofness. The waterproofness of the prepared products is 3-5 levels, while the products currently on the market are generally 1-3 levels.

[0020] (4) High production efficiency and easy process control. The high-elasticity and high-strength medical tape prepared by this method has a high production speed and a wide range of process parameters, so the production efficiency is high because it has little impact on the processing of subsequent processes. DETAILED DESCRIPTION

[0021] The technical solution of this patent is described in detail below through embodiments, but the protection scope of this patent is not limited to the embodiments.

[0022] Example 1

[0023] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0024] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 90:5:5, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.5 MPa to produce a fabric with high elasticity and high strength.

[0025] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 The release film is then dried in a drying oven at 110° C. The dried release film is compounded with the high-elasticity and high-strength fabric obtained in step (1) through a compounding roller to prepare a high-elasticity and high-strength fabric tape roll.

[0026] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0027] Example 2

[0028] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0029] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer in a mass ratio of 90:7:3, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0030] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping, with a glue amount of 50 g / m 2 The release film is then dried in a drying oven at 110° C. The dried release film is compounded with the high-elasticity and high-strength fabric obtained in step (1) through a compounding roller to prepare a high-elasticity and high-strength fabric tape roll.

[0031] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0032] Example 3

[0033] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0034] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer in a mass ratio of 88:9:3, stirred for 1.5 hours, and dried at 80°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0035] (2) The liquid adhesive (Henkel 2954) is coated on the PET release film by scraping, with an adhesive amount of 50 g / m2, and then dried in a drying oven at 110°C. The dried release film is composited with a high-elasticity and high-strength fabric through a composite roller to prepare a high-elasticity and high-strength fabric tape roll.

[0036] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0037] Example 4

[0038] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0039] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 90:4:6, stirred for 1 hour, and dried at 85°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 235°C, and then extruded and spun into fabric through a die head at a pressure of 1.8 MPa to produce a fabric with high elasticity and high strength.

[0040] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 , and then dried in a drying oven at 110°C, and the dried release film is compounded with a high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0041] (3) placing the high-elasticity and high-strength medical tape roll on a slitting machine, slitting it into small rolls of high-elasticity and high-strength medical tape as needed, packaging it and using it.

[0042] Example 5

[0043] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0044] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 92:5:3, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.5 MPa to produce a fabric with high elasticity and high strength.

[0045] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 , and then dried in a drying tunnel at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0046] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0047] Example 6

[0048] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0049] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 85:10:5, stirred for 1 hour, and dried at 80°C after being evenly mixed. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 220°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0050] (2) Apply solid adhesive (Henkel 3955) on the release film by screw extrusion with a glue amount of 50 g / m 2 , the coating temperature is 140°C, and the release film of the coated adhesive is compounded with the obtained high-elasticity and high-strength cloth through a compounding roller to prepare a high-elasticity and high-strength cloth tape roll.

[0051] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0052] Example 7

[0053] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0054] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer in a mass ratio of 90:8:2, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0055] (2) Apply liquid adhesive (Henkel 2954) on the release paper by scraping with a glue amount of 50 g / m 2 , and then dried in a drying oven at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0056] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0057] Example 8

[0058] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0059] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 90:5:5, stirred for 1 hour, and dried at 90°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0060] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 , and then dried in a drying oven at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0061] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0062] Example 9

[0063] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0064] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 90:2:8, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0065] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 , and then dried in a drying oven at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0066] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0067] Example 10

[0068] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0069] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 90:3:7, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 220°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0070] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 , and then dried in a drying oven at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0071] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0072] Embodiment 11

[0073] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0074] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 90:5:5, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 225°C, and then extruded and spun into fabric through a die head at a pressure of 1.8 MPa to produce a fabric with high elasticity and high strength.

[0075] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 , and then dried in a drying oven at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0076] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0077] Example 12

[0078] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0079] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer at a mass ratio of 87:8:5, stirred for 1 hour, and then dried at 80°C after being evenly mixed. The dried mixed particles were then added to a melt-blown fabric tank, heated and melted at 230°C, and then extruded and spun into fabric through a die head at a pressure of 1.7 MPa to produce a fabric with high elasticity and high strength.

[0080] (2) Apply liquid adhesive (Henkel 2954) on the PET release film by scraping with a glue amount of 50 g / m 2 , and then dried in a drying oven at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0081] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0082] Embodiment 13

[0083] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0084] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer in a mass ratio of 90:7:3, stirred for 1.5 hours, and dried at 80°C after being mixed evenly. The dried mixed particles were added to a melt-blown fabric tank, heated and melted at 235°C, and then extruded and spun into fabric through a die head at a pressure of 1.7 MPa to produce a fabric with high elasticity and high strength.

[0085] (2) Apply solid adhesive (Henkel 3955) on the release film by screw extrusion with a glue amount of 50 g / m 2 , the coating temperature is 140°C, and the release film coated with the adhesive is compounded with the obtained high-elasticity and high-strength cloth through a compounding roller to prepare a high-elasticity and high-strength cloth tape roll.

[0086] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0087] Embodiment 14

[0088] A high-elasticity and high-strength medical tape, the preparation method of which is as follows:

[0089] (1) Polyurethane particles (Covestro 3790AU), polyester particles (DuPont 560, USA) and polypropylene particles (Formosa Plastics 1450T) were added to a stirrer in a mass ratio of 91:6:3, stirred for 1 hour, and dried at 80°C after being mixed evenly. The dried mixed particles were added to a melt-blown fabric tank, heated and melted at 225°C, and then extruded and spun into fabric through a die head at a pressure of 1.6 MPa to produce a fabric with high elasticity and high strength.

[0090] (2) Apply liquid adhesive (Henkel 2954) on the release paper by scraping with a glue amount of 50 g / m 2 , and then dried in a drying tunnel at 110°C, and the dried release film is compounded with the obtained high-elasticity and high-strength cloth through a composite roller to prepare a high-elasticity and high-strength cloth tape roll.

[0091] (3) The obtained cloth tape roll is placed on a slitting machine, and after slitting, a high-elasticity and high-strength medical tape is obtained.

[0092] The properties of the medical tapes obtained in Examples 1-14 were tested using the following method. The results are shown in Table 2.

[0093] 1. Tensile strength and elasticity are based on GB / T3923.1-2013 Tensile properties of textile fabrics Part 1: Determination of breaking strength and elongation at break.

[0094] 2. Air permeability is measured according to the general requirements for medical tapes YY / T0148-2006.

[0095] 3. The waterproof grade test method is as follows:

[0096] (1) Cut 100 to 200 cm of the waterproof medical tape prepared in Examples 1 and 2 as a sample, and then cut three samples of 180 mm × 180 mm in size in sequence. There should be no wrinkles or folds on the sampling site.

[0097] (2) Adjust the cut test specimen under test conditions for more than 4 hours. Then clamp the specimen with a clamp and place it on a support with the test surface facing upwards.

[0098] (3) Pour 250 mL of test water (with a certain amount of fluorescent whitening agent added) into the funnel quickly and steadily, and continue spraying for 25 to 30 seconds. After the spraying stops, immediately remove the holder holding the sample so that the test sample is facing down and almost horizontal.

[0099] (4) Then tap the holder lightly against a solid hard object, rotate the holder horizontally 180° and tap the holder again. After tapping, place the fabric under a standard light source and immediately rate the degree of wetting on the front side of the sample on the holder according to the description of the water-wetting phenomenon in Table 1.

[0100] Table 1 Water level determination standard

[0101] Water level Description of water contact Level 0 The entire sample surface is completely wetted Level 1 Complete wetting of the exposed surface Level 1-2 The sample surface is wetted beyond the spray point, and the wetted area exceeds half of the sprayed surface Level 2 The sample surface is wetted beyond the spray point, and the wetted area is about half of the sprayed surface Level 2-3 The sample surface is wetted beyond the spray point, and the wetted area is less than half of the sprayed surface Level 3 Wetting of the sample surface at the spray point Level 3-4 The sample surface is wetted at equal to or less than half of the spray points Level 4 The sample surface is wetted at sporadic spray points Level 4-5 The sample surface is not wetted, with a small amount of water droplets Level 5 No water droplets or wetting on the specimen surface

[0102] Table 2

[0103] Example Strength N / 2.5cm elasticity% <![CDATA[Air permeability g / m 2 .24h]]> Waterproof level Example 1 38 240 4826 4 Example 2 38 235 4813 4 Example 3 36 254 4636 5 Example 4 37 248 5169 5 Example 5 35 241 5008 4 Example 6 37 251 4857 3 Example 7 34 238 4696 4 Example 8 41 244 5447 4 Example 9 38 233 4792 4 Example 10 37 245 5204 4 Embodiment 11 36 249 4937 5 Example 12 39 247 4790 4 Embodiment 13 38 235 5228 4 Embodiment 14 38 251 5002 5

[0104] It can be seen from Table 2 that the medical tape prepared by the present invention has high strength, good elasticity, high waterproof performance and good air permeability.

Claims

1. A high-elasticity and high-strength medical tape, characterized in that: The invention comprises a non-woven fabric layer and an adhesive layer; the non-woven fabric layer is prepared by mixing polyurethane particles, polyester particles and polypropylene particles in proportion and then using a melt-blowing process.

2. A high-elasticity and high-strength medical tape according to claim 1, characterized in that: The polyurethane particles are aromatic polyurethane particles.

3. A high-elasticity and high-strength medical tape according to claim 2, characterized in that: The raw material of the aromatic polyurethane includes toluene diisocyanate.

4. The high-elasticity and high-strength medical tape according to claim 1, characterized in that: The polyester particles are polyvinyl acetate particles.

5. The high-elasticity and high-strength medical tape according to claim 1, characterized in that: The polypropylene particles are copolymerized polypropylene particles.

6. The high-elasticity and high-strength medical tape according to claim 1, characterized in that: The mass ratio of the polyurethane particles, the polyester particles and the polypropylene particles is (80-95):(1-10):(1-10).

7. A method for preparing a high-elasticity and high-strength medical tape according to any one of claims 1 to 6, characterized in that: The following steps are involved: (1) adding polyurethane particles, polyester particles and polypropylene particles in a proportion into a mixer and stirring and mixing them, then drying the mixed particles and adding them into a melt-blowing machine for melt spinning to obtain a non-woven fabric; (2) Then, the adhesive is coated on the release material, and then compounded with the non-woven fabric obtained in step (1), and rolled and slit to obtain a high-elasticity and high-strength medical tape.

8. The method for preparing a high-elasticity and high-strength medical tape according to claim 7, characterized in that: In step (1), the drying temperature is 50-150° C., the melt spinning temperature is 150-280° C., and the spinning pressure is 0.5-2.0 MPa.

9. The method for preparing a high-elasticity and high-strength medical tape according to claim 7, characterized in that: In step (2), the adhesive is a solid adhesive or a liquid adhesive.

10. The method for preparing a high-elasticity and high-strength medical tape according to claim 7, characterized in that: In step (2), the release material is one of release paper and release film.