CN212357133U - Adhesive tape and medical protective clothing - Google Patents

Abstract

The application provides an adhesive tape and a medical protective garment. The sticky tape is including hydrophobic layer, antistatic layer, substrate layer, first adhesive linkage, barrier layer and the second adhesive linkage that stacks gradually the setting. The seam of the medical protective clothing is hermetically connected with the adhesive tape. The application provides an adhesive tape and medical protective clothing, has good sealed and protective effect, convenient to use, and is with low costs, especially is applicable to the seam crossing of medical protective clothing.

Description

Adhesive tape and medical protective clothing

Technical Field

The application relates to the field of medical equipment, in particular to an adhesive tape and a medical protective garment.

Background

After the 20 th century and the 80 th century, with the deep understanding of human beings about blood-borne pathogens such as HIV (acquired immune deficiency syndrome virus), HBV (hepatitis B virus), HCV (hepatitis C virus) and the like, people pay more and more attention to the risk that medical workers may be infected in the process of treating patients, and thus, various countries begin to develop medical protective clothing, so that the protective clothing industry is developed vigorously. In particular, SARS (atypical pneumonia) 2003 and the new coronavirus outbreak in early 2020, there are cases where medical workers are infected, and people are aware of the importance of self-defense.

One of the most important properties of protective garments is the protective function. The protective properties of the protective clothing mainly include liquid barrier, microorganism barrier, barrier to particulate matters and the like. However, in the production process of the protective clothing, seams exist between the fabric and the fabric, and pores of the sewing needles are left after sewing, so that the sealing performance of the protective clothing at the seams is poor, bacteria, viruses, ultrafine particles, harmful gases and the like can enter the protective clothing through the seams, and the completely sealed protective effect cannot be achieved.

At present, the measure adopted for solving the problem of pores of needles of protective clothing is to paste a sealing adhesive tape at the joint position, but how to solve the new requirements of simultaneously meeting the blocking of liquid containing microorganisms in the horizontal and vertical directions and preventing the adsorption of solid particles such as ultrafine dust and the like is a problem to be solved urgently in the industry.

In view of this, the present application is specifically made.

SUMMERY OF THE UTILITY MODEL

An object of the present application is to provide an adhesive tape and a medical protective garment to solve the above problems.

In order to achieve the purpose, the following technical scheme is adopted in the application:

the utility model provides an adhesive tape, includes hydrophobic layer, antistatic layer, substrate layer, first adhesive linkage, barrier layer and the second adhesive linkage that stacks gradually the setting.

Through the setting of each functional layer, can effectually realize particulate matter barrier properties such as liquid barrier properties, microorganism barrier properties, superfine dust and the protection of level and perpendicular to sticky tape direction.

The liquid barrier property means that the adhesive tape provided by the application can realize excellent hydrophobicity at the seams of the medical protective clothing, and can prevent the permeation of water, blood, alcohol and other liquids so as to avoid contaminating clothes and human bodies. The virus carried by the blood, body fluid and other secretions of the patient in the operation process is prevented from being infected to medical personnel. Microbial barrier properties include barriers to bacteria and viruses. The barrier to bacteria is primarily intended to prevent contact transmission (and back-propagation) of medical personnel to the wound surface of a patient during surgery. The virus barrier is mainly used for preventing medical staff from contacting blood and body fluid of patients, and viruses carried in the medical staff cause cross infection between doctors and patients. The barrier property of particulate matters such as ultrafine dust means that viruses transmitted through air are prevented from being inhaled in the form of aerosol or attached to the surface of skin and absorbed by human body.

Preferably, the thickness of the hydrophobic layer is 1-5 μm.

Preferably, the thickness of the hydrophobic layer may be any value between 1 μm, 2 μm, 3 μm, 4 μm, 5 μm and 1-5 μm.

Preferably, the material of the antistatic layer includes a quaternary ammonium salt type antistatic agent or a polyoxyethylene polymer compound.

The antistatic layer is formed by coating antistatic agent on the non-coated surface of the base material by means of spraying, dipping or soaking. The quaternary ammonium salt antistatic agent or the polyoxyethylene polymer compound is prepared from the existing raw materials, and the application is not limited.

Preferably, the material of the substrate layer comprises a woven cloth made of polyester fibers.

The polyester fiber can provide enough tensile strength, and can effectively avoid the deformation or the fracture of the adhesive tape caused by tensile stress in the using process, so that the sealing effect is poor.

Preferably, the thickness of the first adhesive layer is 5-50 μm, and the thickness of the second adhesive layer is 20-80 μm;

preferably, the thickness of the first adhesive layer is 10-20 μm, and the thickness of the second adhesive layer is 30-50 μm.

Optionally, the first adhesive layer has a thickness of any one of 5 μm, 10 μm, 15 μm, 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm and 5 to 50 μm, and the second adhesive layer has a thickness of any one of 20 μm, 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm and 20 to 80 μm.

Preferably, the material of the barrier layer comprises non-woven fabric;

preferably, the material of the barrier layer is polypropylene melt-blown fabric;

preferably, the thickness of the barrier layer is 3-20 μm;

preferably, the thickness of the barrier layer is 5-10 μm.

The barrier layer is made of non-woven fabric, and natural or synthetic fibers are combined into the non-woven fabric with specific functions through heat sealing, chemical or mechanical means and the like. The barrier layer in this application can select for use spunlace cloth (make wood pulp and polyester fiber bond together through high-speed rivers, improve material separation liquid permeability through chemical treatment), wet process non-woven fabrics and melt-blown fabric (spunbonded with melt-blown composite non-woven fabrics) in one of, preferred melt-blown fabric, the more preferred melt-blown fabric that adopts the polypropylene materials to make.

Alternatively, the thickness of the barrier layer may be any value between 3 μm, 5 μm, 10 μm, 15 μm, 20 μm, and 3-20 μm.

Optionally, the first adhesive layer and the second adhesive layer comprise an aqueous polyurethane adhesive.

The seam of the medical protective clothing is hermetically connected with the adhesive tape.

Compared with the prior art, the beneficial effect of this application includes:

according to the adhesive tape provided by the application, the hydrophobic layer can prevent liquid from infiltrating to the non-adhesive surface of the adhesive tape with low surface energy in the vertical direction; the antistatic layer can prevent static electricity generated by the adhesive tape due to friction and the like from adsorbing tiny particles in the air; the base material layer provides basic strength and support for the adhesive tape; the barrier layer can block liquid from entering the protective clothing in the vertical direction; the first bonding layer can play a certain role in blocking besides the role in bonding the substrate layer and the blocking layer; the second adhesive layer, in addition to functioning as a securing tape, is also capable of blocking liquid, microorganisms, and particulate matter from entering the bonded area in a direction parallel to the surface of the protective garment (including both the bonding interface and the horizontal direction inside the adhesive layer). Through the matching of all the functional layers, the adhesive tape can obtain the obstruction of an adhesive interface, a horizontal direction, a vertical direction and other three directions to liquid, microorganism, solid particles and other pollutants, and the safety of an adhered object at a joint is effectively ensured;

the application provides an adhesive tape, can extensively be used for in all kinds of protection products.

The application provides a medical protective clothing has good protective effect to microorganism, liquid, particulate matter etc..

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments are briefly described below, and it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope of the present application.

Fig. 1 is a schematic structural view of an adhesive tape provided in an embodiment of the present application;

fig. 2 is a schematic view of the function of the adhesive tape provided by the present application.

Reference numerals:

1-a hydrophobic layer; 2-an antistatic layer; 3-a substrate layer; 4-a first adhesive layer; 5-a barrier layer; 6-second adhesive layer.

Detailed Description

The terms as used herein:

"prepared from … …" is synonymous with "comprising". The terms "comprises," "comprising," "includes," "including," "has," "having," "contains," "containing," or any other variation thereof, as used herein, are intended to cover a non-exclusive inclusion. For example, a composition, process, method, article, or apparatus that comprises a list of elements is not necessarily limited to only those elements but may include other elements not expressly listed or inherent to such composition, process, method, article, or apparatus.

The conjunction "consisting of … …" excludes any unspecified elements, steps or components. If used in a claim, the phrase is intended to claim as closed, meaning that it does not contain materials other than those described, except for the conventional impurities associated therewith. When the phrase "consisting of … …" appears in a clause of the subject matter of the claims rather than immediately after the subject matter, it defines only the elements described in the clause; other elements are not excluded from the claims as a whole.

When an amount, concentration, or other value or parameter is expressed as a range, preferred range, or as a range of upper preferable values and lower preferable values, this is to be understood as specifically disclosing all ranges formed from any pair of any upper range limit or preferred value and any lower range limit or preferred value, regardless of whether ranges are separately disclosed. For example, when the range "1 ~ 5" is disclosed, the ranges described should be construed to include the ranges "1 ~ 4", "1 ~ 3", "1 ~ 2 and 4 ~ 5", "1 ~ 3 and 5", and the like. When a range of values is described herein, unless otherwise stated, the range is intended to include the endpoints thereof and all integers and fractions within the range.

In these examples, the parts and percentages are by mass unless otherwise indicated.

"part by mass" means a basic unit of measure indicating a mass ratio of a plurality of components, and 1 part may represent any unit mass, for example, 1g or 2.689 g. If we say that the part by mass of the component A is a part by mass and the part by mass of the component B is B part by mass, the ratio of the part by mass of the component A to the part by mass of the component B is a: b. alternatively, the mass of the A component is aK and the mass of the B component is bK (K is an arbitrary number, and represents a multiple factor). It is unmistakable that, unlike the parts by mass, the sum of the parts by mass of all the components is not limited to 100 parts.

"and/or" is used to indicate that one or both of the illustrated conditions may occur, e.g., a and/or B includes (a and B) and (a or B).

Embodiments of the present application will be described in detail below with reference to specific examples, but those skilled in the art will appreciate that the following examples are only illustrative of the present application and should not be construed as limiting the scope of the present application. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.

First, some of the substances used in the examples of the present application will be explained: the waterborne polyurethane emulsion adopts Dispercoll U series products produced by Covestro company; the acrylate emulsion can be prepared by emulsion polymerization of soft monomer (one or more of Ethyl Acrylate (EA), Butyl Acrylate (BA) and isooctyl acrylate (2-EHA)), hard monomer (one or more of vinyl acetate (VAc), Acrylonitrile (AN), acrylamide, styrene (St), Methyl Methacrylate (MMA) and methyl acrylate) and functional monomer (one or more of methacrylic acid, Acrylic Acid (AA), hydroxyethyl acrylate, hydroxypropyl acrylate, hydroxyethyl methacrylate, hydroxypropyl methacrylate, glycidyl methacrylate, maleic anhydride, N-hydroxymethyl acrylamide and trimethylamine ethyl methacrylate) under initiator and emulsifier to obtain pure acrylate emulsion, an Acronal series acrylate emulsion from BASF may be selected, with Acronal 296D being preferred. The polyisocyanate is blocked by phenol or other compounds containing monofunctional active hydrogen atoms, and has good storage stability in normal conditions. The polyisocyanate component reacts with the blocking agents such as phenol, malonate and caprolactam to generate urethane bonds, the urethane bonds are cracked under the condition of heating to generate isocyanate, and then the isocyanate reacts with the hydroxyl component in the aqueous polyurethane emulsion to generate polyurethane. Therefore, the film formation of the blocked polyurethane in the patent is to use the difference of the thermal stability of the urethane bonds with different structures to replace the weaker urethane bonds with the more stable urethane bonds. The aqueous isocyanate emulsion in the patent can adopt toluene diisocyanate dimer, preferably Dispercoll BL XP 2514 produced by Covestro company; the substrate layer can be made of polyester fiber fabric, preferably polyester TAFFETA.

Example 1

As shown in fig. 1, the present application provides an adhesive tape, which comprises a hydrophobic layer 1, an antistatic layer 2, a substrate layer 3, a first adhesive layer 4, a blocking layer 5 and a second adhesive layer 6, which are sequentially stacked from top to bottom. The thickness of the hydrophobic layer 1 is 2 μm, the thickness of the antistatic layer 2 is 3 μm, the thickness of the substrate layer 3 is 70 μm, the thickness of the first adhesive layer 4 is 5 μm, the thickness of the barrier layer is 10 μm, the thickness of the second adhesive layer is 50 μm, and the total thickness of the adhesive tape is controlled to be 140 μm.

The water-based polyurethane adhesive comprises the following materials in percentage by weight:

the manufacturing process is as follows:

the method comprises the following steps: selecting polyester taffeta as a base material layer 3, and treating the surface of the base material layer; coating the quaternary ammonium salt antistatic agent on the non-coated surface of the base material layer 3 in a curtain coating mode on the non-coated surface of the base material layer 3 to obtain an antistatic layer 2;

step two: coating a hydrophobic agent on the surface of the antistatic layer 2 in a curtain coating mode to obtain a hydrophobic layer 1;

step three: the prepared aqueous polyurethane adhesive is directly coated on the adhesive surface of the substrate layer 3 by comma coating to obtain the first adhesive layer 4. Then, using an oven to volatilize water, and compounding polypropylene melt-blown cloth serving as a barrier layer 5 with the first bonding layer 4 before cooling;

step four: the prepared aqueous polyurethane adhesive is directly coated on the surface of the barrier layer 5 by comma coating to obtain a second adhesive layer 6. Drying in a drying oven, volatilizing the hydrosolvent, cooling and curling into the adhesive tape.

The relevant properties of the resulting tape are shown in table 1 below:

TABLE 1 Properties of the adhesive tape obtained in example 1

Example 2

As shown in fig. 1, the present application provides an adhesive tape, which comprises a hydrophobic layer 1, an antistatic layer 2, a substrate layer 3, a first adhesive layer 4, a blocking layer 5 and a second adhesive layer 6, which are sequentially stacked from top to bottom. The thickness of the water-repellent layer 1 is 5 μm, the thickness of the antistatic layer 2 is 5 μm, the thickness of the base material layer 3 is 50 μm, the thickness of the first adhesive layer 4 is 15 μm, the thickness of the barrier layer is 20 μm, and the thickness of the second adhesive layer is 30 μm.

The water-based polyurethane adhesive comprises the following materials in percentage by weight:

the manufacturing process is as follows:

the method comprises the following steps: selecting polyester taffeta as a base material layer 3, and treating the surface of the base material layer; coating the polyoxyethylene polymer compound on the non-gluing surface of the substrate layer 3 in a spraying manner to obtain the antistatic layer 2;

step two: coating a hydrophobic agent on the surface of the antistatic layer 2 in a spraying mode to obtain a hydrophobic layer 1;

step three: and directly coating the prepared waterborne polyurethane adhesive on the adhesive-coated surface of the substrate layer 3 in a slit coating mode to obtain the first adhesive layer 4. Then, using an oven to volatilize water, and compounding polypropylene melt-blown cloth serving as a barrier layer 5 with the first bonding layer 4 before cooling;

step four: and directly coating the prepared waterborne polyurethane adhesive on the surface of the barrier layer 5 in a reticulate pattern coating mode to obtain a second adhesive layer 6. Drying in a drying oven, volatilizing the hydrosolvent, cooling and curling into the adhesive tape.

The relevant properties of the resulting tape are shown in table 2 below:

table 2 properties of the adhesive tape obtained in example 2

Example 3

As shown in fig. 1, the present application provides an adhesive tape, which comprises a hydrophobic layer 1, an antistatic layer 2, a substrate layer 3, a first adhesive layer 4, a blocking layer 5 and a second adhesive layer 6, which are sequentially stacked from top to bottom. The thickness of the hydrophobic layer 1 is 5 μm, the thickness of the antistatic layer 2 is 5 μm, the thickness of the base material layer 3 is 60 μm, the thickness of the first adhesive layer 4 is 10 μm, the thickness of the barrier layer is 5 μm, and the thickness of the second adhesive layer is 40 μm.

The water-based polyurethane adhesive comprises the following materials in percentage by weight:

the manufacturing process is as follows:

the method comprises the following steps: selecting polyester taffeta as a base material layer 3, and treating the surface of the base material layer; coating the polyoxyethylene polymer compound on the non-gluing surface of the substrate layer 3 in a spraying manner to obtain the antistatic layer 2;

step two: coating a hydrophobic agent on the surface of the antistatic layer 2 in a curtain coating mode to obtain a hydrophobic layer 1;

step three: and directly coating the prepared waterborne polyurethane adhesive on the adhesive-coated surface of the substrate layer 3 in a wire rod coating mode to obtain the first adhesive layer 4. Then, using an oven to volatilize water, and compounding polypropylene melt-blown cloth serving as a barrier layer 5 with the first bonding layer 4 before cooling;

step four: and directly coating the prepared waterborne polyurethane adhesive on the surface of the barrier layer 5 in a reticulate pattern coating mode to obtain a second adhesive layer 6. Drying in a drying oven, volatilizing the hydrosolvent, cooling and curling into the adhesive tape.

The relevant properties of the resulting tape are shown in table 3 below:

table 3 properties of the adhesive tape obtained in example 3

As can be seen from the above tables 1, 2, and 3, the adhesive tape provided in the present application has an advantage of blocking the penetration of the microorganism-containing liquid from three directions, i.e., the horizontal bonding interface, the horizontal bonding interlayer, and the vertical direction, and simultaneously prevents the adsorption of solid particles such as ultrafine dust on the surface of the adhesive tape. The excellent tensile strength can avoid deformation or fracture of seams of the protective clothing caused by stretching, bending and the like during wearing and using. Lower heat activation temperatures can provide excellent bond strength while avoiding damage to thinner protective garments from heat. The aqueous polyurethane adhesive makes the tape free of toxic low volatile organic solvents (VOC).

The protection principle is shown in fig. 2.

Comparative example 1

The difference from example 1 is that only a conventional solvent type acrylate pressure sensitive adhesive (ETERSOL 1360 manufactured by Changxing chemical industry (China)) was used as the first and second adhesive layers.

Comparative example 2

Compared to example 1, except that no hydrophobic layer was included.

Comparative example 3

Compared to example 1, except that an antistatic layer was not included.

Comparative example 4

The difference from example 1 is that a PET film (75 μ thick) was used as the base layer.

Comparative example 5

Compared with example 1, the difference is that only a conventional high temperature curing hot melt adhesive film (a thermosetting adhesive film tesa8472 manufactured by deza (europe)) is used.

The adhesive tapes obtained in the comparative examples were subjected to the performance test, and the results are shown in the following table 4:

TABLE 4 Properties of the tapes obtained in the comparative examples

As can be seen from table 4 above, the adhesive tape provided in the present application has the following advantages:

1. the conventional acrylate pressure-sensitive adhesive (comparative example 1) was moderate in adhesive strength for protection and blocking of liquid, and did not increase the adhesive strength by heat activation at high temperature. Because the used waterborne polyurethane adhesive belongs to a structural adhesive, the waterborne polyurethane adhesive has the super-strong bonding capability on the seams of the protective clothing which has low surface energy and is not easy to bond after being thermally activated, and can prevent liquid containing microorganisms from penetrating from a bonding interface in the horizontal direction to enter the interior of the protective clothing (the peeling strength performance is adopted for representation).

2. For the protection and the blocking of liquid, the cohesion property of the used aqueous polyurethane adhesive after curing and crosslinking is very excellent (compared with the comparative example 1), so that the liquid containing microorganism is prevented from permeating from the bonding layer in the horizontal direction (the cohesion of the adhesive tape is used and is also called the permanent adhesion property).

3. For protection and blocking of liquid, since the tape surface has a hydrophobic functional layer (compared with comparative example 2), it can prevent liquid from infiltrating into the tape in the vertical direction (characterized by the surface energy dyne value of the tape surface).

4. For the protection and the blocking of liquid, the adhesive tape structure is provided with the blocking layer, so that the liquid can be further blocked from entering the seam in the vertical direction.

5. For the protection of the ultrafine particles, the surface of the adhesive tape has antistatic performance (compared with the comparative example 3), so that the adhesive tape can be prevented from electrostatically adsorbing the fine particles in the air (represented by the surface resistance value of the surface of the adhesive tape) due to friction and the like.

6. The used adhesive tape base material is a polyester fiber fabric base material with excellent tensile strength and low tensile rate (compared with comparative example 4), and further avoids deformation or fracture of the adhesive tape (characterized by the tensile strength and the elongation at break of the adhesive tape) caused by the stretching of the protective clothing during wearing and using the protective clothing.

7. For the application, the adhesive used is a compound adhesive of water-based thermosetting polyurethane and water-based acrylate pressure-sensitive adhesive (compared with the thermosetting adhesive film only used in comparative example 5). At normal temperature, the adhesive tape has very low viscosity, and is convenient for preliminary positioning and bonding of the joint compared with a non-viscous thermosetting adhesive film. Meanwhile, due to low viscosity, the adhesive tape is easy to peel off and then reposition under the condition that the placement position is inaccurate.

8. As for the use conditions, due to the low curing and crosslinking temperature of the used aqueous polyurethane adhesive, compared with the comparative example 5, the heat activation temperature of the adhesive tape can be reached or exceeded only by the lower processing temperature in the process of using the adhesive tape by heating, so that the damage of the surface function of the temperature-sensitive protective clothing (characterized by the DSC activation temperature of the adhesive tape) can not be caused.

9. The adhesive used for the first adhesive layer and the second adhesive layer is water-based polyurethane adhesive, compared with a solvent-based acrylic adhesive used for the second adhesive layer of the first box (comparative example 1), the adhesive tape has the advantages that the lower thermal activation temperature and the excellent adhesive strength are provided, and meanwhile, the manufactured adhesive tape does not contain toxic low-volatility organic solvent (VOC), thereby being beneficial to environmental protection and human body protection.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Moreover, those skilled in the art will appreciate that while some embodiments herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims above, any of the claimed embodiments may be used in any combination. The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

Claims (10)

1. The utility model provides an adhesive tape, its characterized in that is including hydrophobic layer, antistatic layer, substrate layer, first adhesive linkage, barrier layer and the second adhesive linkage that stacks gradually the setting.

2. Adhesive tape according to claim 1, characterized in that the thickness of the hydrophobic layer is 1-5 μm.

3. The adhesive tape according to claim 1, wherein the material of the antistatic layer comprises quaternary ammonium salt antistatic agent or polyoxyethylene polymer compound.

4. The adhesive tape according to claim 1, wherein the material of the substrate layer comprises a woven fabric made of polyester fibers.

5. The adhesive tape according to claim 1, wherein the thickness of the first adhesive layer is 5 to 50 μm and the thickness of the second adhesive layer is 20 to 80 μm.

6. The tape of claim 5 wherein the first adhesive layer has a thickness of 10-20 μm and the second adhesive layer independently has a thickness of 30-50 μm.

7. Adhesive tape according to claim 1, characterized in that the thickness of the barrier layer is 3-20 μm.

8. Adhesive tape according to claim 7, characterised in that the thickness of the barrier layer is 5-10 μm.

9. The tape of any one of claims 1-8 wherein the material of the barrier layer comprises a nonwoven fabric comprising a polypropylene meltblown.

10. A medical protective garment, characterized in that the adhesive tape according to any one of claims 1 to 9 is hermetically connected to the seams of the medical protective garment.

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