CN113462298B - Hot-melt adhesive tape for medical surgical gown and preparation method thereof - Google Patents
Hot-melt adhesive tape for medical surgical gown and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/21—Paper; Textile fabrics
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D13/00—Professional, industrial or sporting protective garments, e.g. surgeons' gowns or garments protecting against blows or punches
- A41D13/12—Surgeons' or patients' gowns or dresses
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D27/00—Details of garments or of their making
- A41D27/24—Hems; Seams
- A41D27/245—Hems; Seams made by welding or gluing
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/35—Heat-activated
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D2200/00—Components of garments
- A41D2200/10—Belts
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/358—Applications of adhesives in processes or use of adhesives in the form of films or foils for garments and textiles
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/10—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet
- C09J2301/12—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers
- C09J2301/122—Additional features of adhesives in the form of films or foils characterized by the structural features of the adhesive tape or sheet by the arrangement of layers the adhesive layer being present only on one side of the carrier, e.g. single-sided adhesive tape
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/304—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being heat-activatable, i.e. not tacky at temperatures inferior to 30°C
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2400/00—Presence of inorganic and organic materials
- C09J2400/20—Presence of organic materials
- C09J2400/26—Presence of textile or fabric
- C09J2400/263—Presence of textile or fabric in the substrate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2465/00—Presence of polyphenylene
- C09J2465/001—Presence of polyphenylene in the barrier layer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2467/00—Presence of polyester
- C09J2467/006—Presence of polyester in the substrate
Abstract
The invention provides a hot melt adhesive tape of a medical operating coat and a preparation method thereof, and relates to the technical field of polymer product processing. The hot-melt adhesive tape provided by the invention is of a three-layer structure, wherein the three-layer structure comprises a mesh fabric substrate layer, a waterproof layer and a hot-melt adhesive layer, the waterproof layer is a middle layer, and the hot-melt adhesive layer comprises the following components in percentage by mass: 90-97% of thermoplastic polyurethane elastomer rubber, 2-5% of nano calcium carbonate, 1-3% of hydrolysis resistant agent, 0.2-1% of antioxidant and 0.2-1% of ultraviolet absorbent. The heat-sealing adhesive tape is formed by compounding the mesh fabric substrate layer, the waterproof layer and the hot-melt adhesive layer, when the heat-sealing adhesive tape is used at the joint of medical surgical gowns, the requirements of WS/T508-2016 and WS310.2-2016 on washing and steam sterilization can be met, the bonding fastness can reach more than 10N/cm, and the hydrostatic pressure can reach 1000mmH 2 O, has good hydrolysis resistance.
Description
Technical Field
The invention relates to the technical field of polymer product processing, mainly relates to a hot melt adhesive, and particularly relates to a hot melt adhesive tape for medical surgical gowns and a preparation method thereof.
Background
The old medical operating gown is not generally subjected to waterproof treatment, and germs and blood easily permeate to cause injury to medical workers. In recent years, although the technology of performing waterproof treatment on the fabric of the operating coat appears, the waterproof treatment is mainly performed by attaching a waterproof coating and then performing glue pressing treatment on the thread position, so that the aim of better protection for obstructing germs and blood is fulfilled.
Since the medical instruments need to be sterilized, steam sterilization (134 ℃,4-6 min) and high-temperature water washing are generally performed. Washing and disinfecting procedure WS/T508-2016 technical hospital medical fabric washing and disinfecting specifications and WS310.2-2016 section 2 of hospital disinfection supply center: specification of cleaning, disinfecting and sterilizing techniques. Most of common three-layer adhesive tapes, namely screen cloth, a waterproof coating and an adhesive hot melt adhesive, are used in the field of outdoor and leisure, the washing procedure of the clothes is GB/T8629N, namely washing at 40 ℃ and drying at 60 ℃, and the requirement on the temperature resistance of the adhesive tapes is not high. If the common three-layer adhesive tape is applied to the medical surgical gown, the phenomena of poor appearance and poor waterproof performance, such as adhesion fastness, edge rising, shrinkage and the like, caused by the fact that the hot melt adhesive does not resist temperature, can occur after multiple times of washing and sterilization under the standard water washing and steam sterilization of WS/T508-2016 and WS 310.2-2016.
Disclosure of Invention
The invention aims to provide a hot melt adhesive tape for medical surgical gowns and a preparation method thereof, and aims to solve the technical problems that the phenomena of poor appearance such as bonding fastness, edge rise, shrinkage and the like and poor waterproof performance caused by the fact that a hot melt adhesive is not resistant to temperature can occur after the conventional three-layer adhesive tape is applied to the medical surgical gowns and is washed and sterilized for multiple times.
In order to achieve the above purpose, in a first aspect, the invention provides a hot melt adhesive tape for medical surgical gowns, the hot melt adhesive tape is of a three-layer structure, the three-layer structure comprises a mesh fabric substrate layer, a waterproof layer and a hot melt adhesive layer, and the waterproof layer is a middle layer, wherein the hot melt adhesive layer comprises the following components in percentage by mass: 90-97% of thermoplastic polyurethane elastomer rubber, 2-5% of nano calcium carbonate, 1-3% of anti-hydrolysis agent, 0.2-1% of antioxidant and 0.2-1% of ultraviolet absorbent.
In the technical scheme of the invention, the mesh fabric substrate layer can play a role in increasing the strength of the heat-seal adhesive tape, protecting the waterproof film from abrasion and increasing the wearing experience; the waterproof layer can play a role in resisting temperature and can ensure that no glue penetration occurs during processing. The hot melt adhesive layer is made of thermoplastic polyurethane elastomer rubber, so that the requirements of washing and steam sterilization can be met, and the bonding fastness between the hot melt adhesive layer (equivalent to a hot melt adhesive tape) and the fabric of the operating coat is ensured. The addition of the nano calcium carbonate can improve the temperature resistance of the hot melt adhesive layer, so that the hot melt adhesive layer has good dimensional stability at high temperature; the addition of hydrolysis resistant auxiliary agent ensures that the hydrostatic pressure can reach 1000mmH when the hot melt adhesive tape is used for medical operating gown 2 O, hydrolysis resistance is obviously improved.
When the hot melt adhesive tape is used, the seam of the medical operating coat prepared by adopting the three-layer composite fabric can meet the requirements of WS/T508-2016 and WS310.2-2016 on washing and steam sterilization, and the bonding fastness can reach over 10N/cm.
As a preferable embodiment of the hot-melt adhesive tape for medical surgical gowns according to the present invention, the thermoplastic polyurethane elastomer rubber has a softening point of 155 o C, melt index at 190 ℃ under 2.16kg test conditions of 10g/10min.
Repeated experiments show that the thermoplastic polyurethane elastomer rubber with the technical parameters can better meet the requirements of washing and steam sterilization, and the bonding fastness between the hot melt adhesive layer and the fabric of the operating coat is improved.
As a preferred embodiment of the hot melt adhesive tape for medical gowns according to the present invention, the hydrolysis resistant agent is polycarbodiimide, the antioxidant includes at least one of antioxidant 1010, antioxidant 168 and antioxidant 1076, and the ultraviolet absorber includes at least one of UV328, UV326 and UV 234.
As a preferred embodiment of the hot melt adhesive tape for medical surgical gowns according to the present invention, the mesh substrate layer includes at least one of a 20D polyester warp knitted mesh and a 20D chiffon polyester mesh.
The terylene mesh cloth has better temperature resistance and thermal contraction resistance.
As a preferable embodiment of the hot melt adhesive tape for medical surgical gowns according to the present invention, the waterproof layer is a PU waterproof coating layer.
In a second aspect, the present invention further provides a method for preparing a hot melt adhesive tape, comprising the following steps:
(1) Uniformly mixing raw material components of the hot melt adhesive layer, and performing melt extrusion by using a single screw extruder to obtain a cast film serving as the hot melt adhesive layer;
(2) And heating and compounding the cast film, the waterproof layer and the mesh fabric substrate layer to obtain the hot melt adhesive tape.
As a preferable embodiment of the production method of the present invention, the thickness of the cast film in the step (1) is 0.15mm.
In the technical scheme of the invention, if the thickness of the casting film is too thin, the hot melt adhesive cannot well permeate into the waterproof film layer during hot pressing, and forms good adhesion with the waterproof film layer, so that the problems of water seepage, no germ, blood and the like can be solved; if the thickness of the casting film is too thick, excessive hot melt adhesive can cause severe glue overflow and affect the appearance during hot pressing. When taken together, the thickness of the cast film is preferably 0.15mm.
As a preferred embodiment of the preparation method of the present invention, the extrusion temperature of the single-screw extruder in the step (1) is 150 to 170 o C, die temperature of 165 o C。
In the technical scheme of the invention, the screw temperature of the screw extruder is divided into 7 sections, and the temperature of each section is shown in the following table 1.
TABLE 1 screw temperature schematic
As a preferred embodiment of the preparation method of the present invention, the heating temperature in the step (2) is 140 deg.C o C, the composite pressure is 6kg.
In a preferred embodiment of the preparation method of the present invention, in the step (1), during the mixing of the raw material components, the thermoplastic polyurethane elastomer rubber in an amount equal to that of the nano calcium carbonate is first taken, and is uniformly mixed with the nano calcium carbonate, and then is mixed with the rest raw materials.
Compared with the prior art, the invention has the beneficial effects that:
according to the technical scheme, the mesh fabric base material, the waterproof layer and the hot melt adhesive layer are compounded to form the hot melt adhesive tape, wherein the hot melt adhesive layer is prepared by mixing thermoplastic polyurethane elastomer rubber serving as a main raw material with nano calcium carbonate and the like, so that when the hot melt adhesive tape finally compounded is hot-pressed at the joint lining position of the medical surgical gown, the requirements of WS/T508-2016 and WS310.2-2016 on washing and steam sterilization can be met, the bonding fastness can reach more than 10N/cm, and the hydrostatic pressure can reach 1000mmH 2 O, has good resistanceAnd (4) hydrolysis performance.
Drawings
FIG. 1 is a schematic view of a hot melt adhesive tape according to the present invention;
fig. 2 is a schematic structural view of the medical surgical gown.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to the following specific examples.
Example 1
The hot melt adhesive tape of this embodiment is three layer construction, and three layer construction is screen cloth substrate layer, waterproof layer and hot melt adhesive layer respectively, and the waterproof layer is the intermediate level, and wherein, the screen cloth substrate layer is 20D dacron warp knitting screen cloth, and the waterproof layer is the PU waterproof layer, and together through the laminating of PUR glue, the hot melt adhesive layer includes the component of following mass percent: 95% of thermoplastic polyurethane elastomer rubber, 3% of nano calcium carbonate, 1% of polycarbodiimide, 0.5% of antioxidant 1010 and 0.5% of UV328, wherein the softening point of the thermoplastic polyurethane elastomer rubber is 150% o C, the melt index is 10g/10min;
the preparation method of the hot melt adhesive tape of the embodiment comprises the following steps:
(1) Firstly, thermoplastic polyurethane elastomer rubber (the mass fraction is 3%) which is equal to nano calcium carbonate is taken, the thermoplastic polyurethane elastomer rubber and the nano calcium carbonate are uniformly mixed and then mixed with the rest raw materials, because the nano calcium carbonate is ultrafine powder, after part of the thermoplastic polyurethane elastomer rubber is mixed before feeding, dust flying of nano calcium carbonate powder can be avoided, and after the raw material components of the hot melt adhesive layer are uniformly mixed, a single-screw extruder is used for melt extrusion to obtain a casting film as the hot melt adhesive layer with the thickness of 0.15 mm;
(2) Heating and compounding the cast film, the waterproof layer and the mesh substrate layer to obtain a hot-melt adhesive tape;
wherein the extrusion temperature of the single screw extruder in the step (1) is 150-170 o C, die temperature of 165 o C; the heating temperature in the step (2) is 140 DEG o C, the composite pressure is 6kg.
Effect example 1
The hot melt adhesive tape prepared in example 1 was cut into 0.35 × 22mm rolls of heat-seal adhesive tape, and the heat-seal adhesive tape was hot-pressed at a wire laying position in the seam of a three-layer composite medical gown using a hot air blower at 550 ℃ to 600 ℃ and a pressing speed of 3m/min under 0.02MPa to test the tape properties. Wherein, the three-layer structure of the medical surgical gown surface fabric of three-layer composite fabric includes: the three-layer composite fabric surgical gown fabric is prepared by bonding and compounding a surface fabric made of a polyester tatted fabric, a base fabric made of a polyester warp-knitted net fabric and an intermediate layer made of a PU or PTFE waterproof film through PUR glue (moisture-cured polyurethane glue), and the specific structure of the three-layer composite fabric surgical gown fabric is shown in figure 2.
The test results were as follows:
a. the hydrostatic pressure value before washing can reach 1000mmH according to the GB/T4744-2013 method test 2 O；
b. Washing with WS/T508-2016 water for 50 times to reach 1000mmH 2 O；
c. The WS310.2-2016 steam sterilizing process is performed for 50 times, the appearance is smooth, and the net water pressure can reach 1000mmH 2 O；
d. The T peel force of the bonding of the heat-seal adhesive tape and the three-layer composite fabric of the operating coat is tested to be 10.5N/cm according to the method of GB/2791-1995.
Example 2
The structure of the hot melt adhesive tape of the embodiment is basically the same as that of the embodiment 1, except that the hot melt adhesive layer of the embodiment comprises the following components in percentage by mass: 93% of thermoplastic polyurethane elastomer rubber, 4% of nano calcium carbonate, 2% of polycarbodiimide, 0.5% of antioxidant 1010, and 0.5% of UV 328;
the method of preparing the hot melt adhesive tape of this example was the same as in example 1.
Effect example 2
The hot melt adhesive tape prepared in example 2 was tested for properties in the same manner as in example 1.
The test results were as follows:
e. the hydrostatic pressure value before washing is 1000mmH according to the method of GB/T4744-2013 2 O；
Press WS/T508-2016 washing method with 50 times of water washing, and the measured net water pressure value is 1000mmH 2 O；
f. Sterilizing by steam WS310.2-2016 for 50 times, and testing net water pressure of 1000mmH 2 O；
g. The T peel force of the bonding of the heat-seal adhesive tape and the three-layer composite fabric of the operating coat is tested to be 9.4N/cm according to the method of GB/2791-1995.
Comparative example 1
The structure of the hot melt adhesive tape of the comparative example is substantially the same as that of example 1, except that the hot melt adhesive layer of the comparative example comprises the following components in percentage by mass: 90.5% of thermoplastic polyurethane elastomer rubber, 7.5% of nano calcium carbonate, 1% of polycarbodiimide, 1010.5% of antioxidant and 0.5% of UV 328;
the hot melt adhesive tape of this comparative example was prepared in the same manner as in example 1.
Comparative Effect example 1
The hot melt adhesive tape prepared in comparative example 1 was tested for properties in the same manner as in example 1.
The test results were as follows:
a. testing the hydrostatic pressure value of 530mmH before water washing according to the method GB/T4744-2013 2 O；
b. Washing with WS/T508-2016 water for 50 times and testing net water pressure of 410mmH 2 O, the edges of the adhesive tapes are not firmly bonded with the fabric after washing, and the edges are easy to rise;
c. sterilizing by steam WS310.2-2016 for 50 times, and testing net water pressure of 500mmH 2 O；
d. The T peel force of the bonding of the heat-sealing adhesive tape and the three-layer composite fabric of the operating coat is tested to be 8.5N/cm according to the method GB/2791-1995.
Comparative example 2
The structure of the hot melt adhesive tape of the comparative example is substantially the same as that of example 1, except that the hot melt adhesive layer of the comparative example comprises the following components in percentage by mass: 97% of thermoplastic polyurethane elastomer rubber, 1% of nano calcium carbonate, 1% of polycarbodiimide, 0.5% of antioxidant 1010 and 0.5% of UV 328;
the preparation method of the hot melt adhesive tape of this comparative example was the same as that of example 1.
Comparative Effect example 2
The hot melt adhesive tape prepared in comparative example 2 was tested for properties in the same manner as in example 1.
The test results were as follows:
a. testing the hydrostatic pressure value of 1000mmH before water washing according to the method GB/T4744-2013 2 O；
b. Washing with WS/T508-2016 water for 50 times and testing net water pressure of 1000mmH 2 O；
c. The strip shrinks (about 10% in the transverse direction and about 5% in the longitudinal direction) 50 times according to the WS310.2-2016 steam sterilization method, and the net water pressure value is 500mmH 2 O；
d. The T peel force of the bonding between the heat-sealing adhesive tape and the three-layer composite fabric of the operating coat is tested to be 11.3N/cm according to the method GB/2791-1995.
Comparative example 3
The structure of the hot melt adhesive tape of this comparative example was the same as that of example 1;
the preparation method of the hot melt adhesive tape of this comparative example was substantially the same as in example 1, except that the extrusion temperature of the single screw extruder in step (1) of this comparative example was 160 to 180 ℃ o C, die temperature 175 o C。
Comparative Effect example 3
The hot melt adhesive tape prepared in comparative example 3 was tested for properties in the same manner as in example 1.
The test results were as follows:
a. the hydrostatic pressure value before washing is 1000mmH according to the method of GB/T4744-2013 2 O；
b. Washing with WS/T508-2016 water for 50 times and testing the net water pressure value to 810mmH 2 O, after washing, the edges of the adhesive tapes are not firmly bonded with the fabric, and the edges are easy to rise;
c. the strip shrinks (about 10% in the transverse direction and about 5% in the longitudinal direction) 50 times according to the WS310.2-2016 steam sterilization method, and the net water pressure value is 500mmH 2 O；
d. The T peel force of the bonding of the heat-sealing adhesive tape and the three-layer composite fabric of the operating coat is tested to be 8.5N/cm according to the method GB/2791-1995.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. The utility model provides a hot melt adhesive tape of medical surgical gown, its characterized in that, hot melt adhesive tape is three layer construction, three layer construction is screen cloth substrate layer, waterproof layer and hot melt adhesive layer respectively, and the waterproof layer is the intermediate level, wherein, hot melt adhesive layer includes the following mass percent's component: 93-95% of thermoplastic polyurethane elastomer rubber, 2-5% of nano calcium carbonate, 1-3% of hydrolysis resistant agent, 0.2-1% of antioxidant and 0.2-1% of ultraviolet absorbent;
the softening point of the thermoplastic polyurethane elastomer rubber is 155 ℃, and the melt index under the test conditions of 190 ℃ and 2.16kg is 10g/10min;
the preparation method of the hot melt adhesive tape comprises the following steps:
(1) Uniformly mixing raw material components of the hot melt adhesive layer, and performing melt extrusion by using a single screw extruder to obtain a cast film serving as the hot melt adhesive layer;
(2) Heating and compounding the cast film, the waterproof layer and the mesh substrate layer to obtain the hot melt adhesive tape;
the extrusion temperature of the single-screw extruder in the step (1) is 150-170 ℃, and the die head temperature is 165 ℃.
2. The hot melt adhesive tape of claim 1, wherein the anti-hydrolysis agent is polycarbodiimide, the antioxidant comprises at least one of antioxidant 1010, antioxidant 168, and antioxidant 1076, and the ultraviolet absorber comprises at least one of UV328, UV326, and UV 234.
3. The hot-melt adhesive tape of claim 1, wherein the scrim substrate layer comprises at least one of a 20D polyester warp knit scrim or a 20D chiffon polyester scrim.
4. A hot-melt adhesive tape according to claim 1, wherein the water-repellent layer is a PU water-repellent coating.
5. A hot-melt adhesive tape according to claim 1, wherein the thickness of the cast film in the step (1) is 0.15mm.
6. The hot-melt adhesive tape according to claim 1, wherein the heating temperature in the step (2) is 140 ℃ and the composite pressure is 6kg.
7. The hot-melt adhesive tape according to claim 1, wherein in the step (1) of mixing the raw material components, the thermoplastic polyurethane elastomer rubber with the same amount as the nano calcium carbonate is taken, uniformly mixed with the nano calcium carbonate and then mixed with the rest raw materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732883.5A CN113462298B (en) | 2021-06-29 | 2021-06-29 | Hot-melt adhesive tape for medical surgical gown and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110732883.5A CN113462298B (en) | 2021-06-29 | 2021-06-29 | Hot-melt adhesive tape for medical surgical gown and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113462298A CN113462298A (en) | 2021-10-01 |
| CN113462298B true CN113462298B (en) | 2023-01-13 |
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| CN109762503B (en) * | 2018-12-13 | 2021-05-14 | 广东盈通新材料有限公司 | TPU bonding layer for heat-sealing adhesive tape, three-layer heat-sealing adhesive tape comprising TPU bonding layer, and preparation method and application of three-layer heat-sealing adhesive tape |
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