JP2018060275A - Infection prevention film - Google Patents

Abstract

[PROBLEMS] To fix an object to be adhered with an appropriate adhesive force, for example, a keyboard, so that it does not easily peel off during use, has sufficient durability when repeatedly touched with a key, and has flexibility to input only the touched key. In particular, it is an object of the present invention to provide an infection prevention film that can achieve the purpose of infection prevention, particularly in a use environment where a plurality of medical personnel are indirectly contacted at a medical site.
An infection-preventing film comprising a base film and an adhesive layer disposed on the base film, the flow direction (MD direction) and the width direction (TD direction) of the base film. The 2% strain elastic modulus is independently 150 to 350 MPa, and the tensile elongation in the flow direction (MD direction) and the width direction (TD direction) of the base film is independently 210 to 1000%. An infection prevention film in which the adhesive strength of the adhesive layer (JIS 0237 compliant 180 degree peel strength) is 0.01 to 0.5 N / 25 mm, and the thickness of the infection prevention film is 10 to 80 μm.
[Selection figure] None

Description

  The present invention relates to an infection prevention film.

  A special keyboard cover has been proposed to protect the PC keyboard from water and dust and prevent malfunctions. For example, Patent Document 1 proposes a keyboard cover having an adhesive elastomer film at a portion in contact with the keyboard. This keyboard cover can prevent displacement from the keyboard due to adhesive performance, and can also prevent deformation of the cover due to displacement. In addition, for example, Patent Document 2 proposes a silicone elastomer sheet having a specific surface roughness, thickness, and rubber hardness, which prevents misalignment without an adhesive and has a good feeling of a finger when touching a key. In addition to improving, it can be easily removed.

  In addition, since cross-infection is concerned because a medical site shares a personal computer such as an electronic medical record among a plurality of medical personnel, it is required to maintain hygiene. On the other hand, for example, Patent Document 3 proposes a keyboard cover formed of a resin containing an antibacterial agent.

Registered Utility Model No. 3032087 Japanese Patent No. 4727868 JP 2006-330954 A

  However, in the prior art, the keyboard cover can be prevented from being displaced from the keyboard, but when the adhesive force is not appropriate, the keyboard cover may be peeled off from the end in a busy medical field. In the unlikely event that the cover is peeled off at the medical site, the purpose of infection prevention will not be achieved. On the other hand, when it is firmly attached to the keyboard with a double-sided tape or the like in order to prevent peeling, the keys around the touched key are followed and pressed, and there is a concern that patient data may be erroneously input. In the case of a material having excellent flexibility such as an elastomer, there is a problem in durability due to repeated key touch.

  The present invention has been made in view of the above problems, and since it can be fixed to a keyboard with an appropriate adhesive force, it is difficult to peel off during use, and has sufficient durability when repeatedly touched with a key, and only the touched key. It is an object of the present invention to provide an infection prevention film that can achieve the purpose of infection prevention, particularly in a use environment where a plurality of medical personnel are indirectly in contact with each other at a medical site.

  As a result of intensive studies, the inventors have found that the 2% strain elastic modulus in the flow direction (MD direction) and the width direction (TD direction), the tensile elongation in the flow direction (MD direction) and the width direction (TD direction), It has been found that the above-mentioned problems can be solved by an infection-preventing film having a base film in which the adhesive strength of the adhesive layer and the thickness of the adhesive film are in a specific range, and the present invention has been completed.

That is, the present invention is as follows.
[1]
An infection prevention film having a base film, and an adhesive layer disposed on the base film,
2% strain elastic modulus in the flow direction (MD direction) and the width direction (TD direction) of the base film is each independently 150 to 350 MPa,
The tensile elongation in the flow direction (MD direction) and the width direction (TD direction) of the base film is independently 210 to 1000%,
The adhesive force of the adhesive layer (JIS 0237 compliant 180 degree peeling force) is 0.01 to 0.5 N / 25 mm,
The thickness of the infection prevention film is 10 to 80 μm.
Infection prevention film.
[2]
The Haze of the infection prevention film is 0.1 to 25%.
The infection prevention film according to [1].
[3]
The base film contains polyethylene as a main component,
The infection prevention film according to [1] or [2].
[4]
A core tube, and the infection prevention film according to any one of [1] to [3] wound around the core tube,
Infection prevention film roll.
[5]
The pulling force for pulling out the infection prevention film from the infection prevention film roll is 30 to 300 cN / 220 mm width,
The wound film for preventing infection according to [4].
[6]
[4] or [5] has an infection prevention film roll, and a box for storing the infection prevention film roll,
The box comprises a cutting tool for cutting the infection-preventing film;
Infection prevention film storage box.

  According to the present invention, for example, when used as a keyboard cover, it can be fixed to the keyboard with an appropriate adhesive force, so that it does not easily peel off during use, and has sufficient durability when repeatedly touched with a key. It is possible to provide an infection prevention film that has flexibility to be input and that can achieve the purpose of infection prevention, particularly in a use environment where a plurality of medical personnel are indirectly in contact with each other at a medical site.

  Hereinafter, a mode for carrying out the present invention (hereinafter referred to as “the present embodiment”) will be described in detail. The following embodiment is an exemplification for explaining the present invention, and is not intended to limit the present invention only to this embodiment. And this invention can be deform | transformed suitably and implemented within the range of the summary.

[Infection prevention film]
The infection prevention film of this embodiment is an infection prevention film having a base film and an adhesive layer disposed on the base film, and the flow direction (MD direction) and the width direction of the base film (TD direction) 2% strain elastic modulus is each independently 150 to 350 MPa, and the tensile elongation in the flow direction (MD direction) and the width direction (TD direction) of the base film is independent of each other. It is 210-1000%, the adhesive strength (180 degree peeling force based on JIS0237) of the said adhesive layer is 0.01-0.5 N / 25mm, and the thickness of an infection prevention film is 10-80 micrometers.

  By having the above-described configuration, the infection prevention film of this embodiment can be fixed to the keyboard with an appropriate adhesive force when used as, for example, a keyboard cover. And has the flexibility to input only touched keys, and is suitable for infection prevention. In the present embodiment, the “infection prevention film” refers to the attachment of bacteria and viruses, blood and vomit, etc. in various medical devices such as an electronic medical record keyboard and operation panel that are contacted by a plurality of medical personnel in a hospital. Other films that prevent the attachment of body fluids and prevent cross-infection between medical personnel.

(Base film)
The 2% strain elastic modulus in the flow direction (MD direction) and the width direction (TD direction) of the base film is independently 150 to 350 MPa, preferably 150 to 300 MPa, more preferably 150 to 200 MPa. It is. Since the 2% strain elastic modulus in the flow direction (MD direction) and the width direction (TD direction) is within the above range, the durability is further improved. Thereby, even when the key is touched repeatedly, it is difficult to break, and it is possible to suppress the infection prevention film from partially extending.

  The 2% strain elastic modulus in the flow direction (MD direction) and the width direction (TD direction) of the base film is controlled by selecting the type and grade of resin used, the prescription of additives, and adjusting the processing conditions accordingly. be able to. In addition, the 2% strain elastic modulus of the flow direction (MD direction) and width direction (TD direction) of a base film can be measured by the method as described in the Example mentioned later.

  Moreover, the tensile elongation of the flow direction (MD direction) and width direction (TD direction) of a base film is 210-1000% each independently, Preferably it is 210-900%, More preferably, 210- 800%. When the tensile elongation in the flow direction (MD direction) and the width direction (TD direction) of the base film is within the above range, the flexibility is further improved. Thereby, it is possible to suppress only the touched key from being input and to press down to the key adjacent to the touched key, so that it is possible to further suppress input mistakes in the field of emergency medical treatment or the like.

  The tensile elongation in the flow direction (MD direction) and the width direction (TD direction) of the base film can be controlled by selecting the type and grade of resin used, the prescription of additives, and adjusting the processing conditions accordingly. . In addition, the tensile elongation of the flow direction (MD direction) and width direction (TD direction) of a base film can be measured by the method as described in the Example mentioned later.

  The critical surface tension (hereinafter also simply referred to as “critical surface tension”) determined by a Zisman plot at 20 ° C. of the base film is preferably 35 to 50 mN / m, more preferably 38 to 42 mN / m. . When the critical surface tension of the base film is within the above range, the pressure-sensitive adhesive is easily applied onto the base film, and the moldability of the pressure-sensitive adhesive layer described later tends to be further improved. The method for controlling the critical surface tension of the base film to the above range is not particularly limited. For example, the method is based on the selection of the resin type constituting the base film, mainly by adjusting the addition amount of the resin material and the plasticizer. The method of controlling is mentioned. In the present embodiment, the critical surface tension of the substrate film at 20 ° C. can be determined by the method described in the examples described later.

  Although it does not specifically limit as a component which comprises a base film, For example, Polyolefins, such as polyethylene and a polypropylene; Polyesters, such as a polyethylene terephthalate; Ethylene / vinyl alcohol copolymer; Ethylene / vinyl acetate copolymer; Polyamide; Examples thereof include polyurethane. Among these, polyolefins are preferable, and it is more preferable to use polyethylene as a main component. By using polyethylene as a main component, the flexibility tends to be further improved. In addition, the component which comprises a base film may be used individually by 1 type, and may be used together 2 or more types.

  In the present embodiment, the “main component” refers to a component of 70% by mass or more, preferably 75% by mass or more, more preferably 85% by mass or more, even more preferably when all components are 100% by mass. Is 90% by mass or more, particularly preferably 100% by mass.

(Adhesive layer)
Furthermore, the infection prevention film of this embodiment further includes an adhesive layer. By further including such an adhesive layer, for example, when used as a keyboard cover, there is an effect that it sticks firmly to the keyboard and easily peels off when peeled off.

  The adhesive strength of the adhesive layer (JIS 0237 compliant 180 degree peel strength) is 0.01 to 0.5 N / 25 mm, preferably 0.03 to 0.3 N / 25 mm, more preferably 0.05 to 0.00. 2N / 25 mm. When the adhesive strength of the adhesive layer is within the above range, the balance between the sticking property to the adherend and the peelability is excellent. Although it does not specifically limit as a method of controlling the adhesive force of an adhesion layer to the said range, For example, the method of adjusting the hardness of an adhesive or the thickness of an adhesion layer is mentioned. In the present embodiment, the adhesive strength of the adhesive layer is a 180 ° peeling force obtained by a measuring method based on JIS0237.

  Although it does not specifically limit as an adhesive which forms an adhesion layer, For example, an acrylic adhesive, a rubber adhesive, a silicone adhesive, a urethane adhesive, and an ethylene / vinyl acetate adhesive are mentioned. Among these, acrylic adhesives, urethane adhesives, and ethylene / vinyl acetate adhesives are preferable.

  In acrylic adhesives, comonomers are added to the main monomer to adjust the cohesive strength, or functional group-containing monomers are added to provide crosslinking points to adjust the hardness of the adhesive to express the desired adhesive strength. Can be. The main monomer used in the acrylic pressure-sensitive adhesive is not particularly limited, and examples thereof include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, and 2-ethylhexyl (meth) acrylate. Various alkyl (meth) acrylates are mentioned, and these can be used alone or in combination. The comonomer is not particularly limited, and examples thereof include vinyl acetate, acrylonitrile, acrylamide, and styrene. Although it does not specifically limit as a functional group containing monomer, For example, acrylic acid, hydroxyethyl acrylate, acrylamide, glycidyl methacrylate, etc. are mentioned. Furthermore, tackiness such as rosin, terpenes, aliphatic and aromatic synthetic resins can be added to adjust the adhesive strength. In addition to the adhesive, a stabilizer, an antioxidant, a light stabilizer, an ultraviolet absorber, and the like may be added.

  When having an adhesive layer formed of an adhesive as described above, the infection-preventing film of this embodiment has an effect that, for example, when used as a keyboard cover, it sticks firmly to the keyboard and easily peels off when peeled off. More expressed. Moreover, it becomes easier to handle without entanglement of the film.

  Moreover, from the viewpoint of the adhesive strength of the adhesive layer, the thickness of the adhesive layer is preferably 0.5 to 20 μm, more preferably 1.0 to 17 μm, and further preferably 3 to 15 μm. When the thickness of the adhesive layer is in the above range, the infection prevention film of this embodiment, for example, is firmly attached to the keyboard when used as a keyboard cover, and the effect of being easily removed when peeled off is further exhibited. Moreover, it becomes easier to handle without entanglement of the film.

(Thickness)
The thickness of the infection prevention film of this embodiment is 10 to 80 μm, preferably 15 to 70 μm, and more preferably 20 to 60 μm. When the thickness is within the above range, the flexibility is further improved. If it is too thick, for example, it is difficult to input keys when it is used as a keyboard cover.

(Haze)
In addition, the haze of the infection prevention film of the present embodiment is preferably 0.1 to 25%, more preferably 0.1 to 15%, and further preferably 0.1 to 7%. When the Haze of the infection prevention film is in the above range, the transparency is further improved, and the visibility of the covered article (eg, keyboard) tends to be further improved. The method for controlling the Haze of the infection prevention film to the above range is not particularly limited. For example, the component constituting the base film and / or the adhesive layer, the selection of the coating plate at the time of adhesive coating, The method of selecting the smoothness of a release paper and a film suitably is mentioned. In addition, in this embodiment, Haze of an infection prevention film can be measured by the method as described in the below-mentioned Example.

(Release layer)
The infection prevention film of this embodiment may further include a release layer on the back surface (the surface on which the adhesive layer is not formed) of the base film. By including the release layer, it tends to be easy to pull out the infection prevention film when the wound body is formed.

  Although it does not specifically limit as a component which forms a release layer, For example, a silicone type resin and a long-chain alkyl pendant polymer type resin are mentioned.

  Moreover, it is preferable that it is 0.1-1.0 micrometer, and, as for the thickness of a mold release layer, it is more preferable that it is 0.15-0.9 micrometer, and it is further more preferable that it is 0.2-0.7 micrometer.

(Other layers)
Furthermore, the infection prevention film of this embodiment may be provided with a printing layer or a primer layer. In addition, for the convenience of protecting the adhesive layer and adhering to an adherend, a release paper or a release resin film may be attached to the adhesive layer as long as the effects of the present invention are not impaired.

[Method for producing infection prevention film]
The manufacturing method of the infection prevention film of this embodiment will not be specifically limited if it is a method which has a base film which 2% strain elastic modulus and tensile elongation satisfy | fill the range mentioned above. Moreover, in order to obtain a base film satisfying the above-described ranges of 2% strain elastic modulus and tensile elongation, for example, a process of extruding a resin as a single layer or a multilayer original fabric from an annular die, and cooling the extruded original fabric The method of comprising by the process to solidify can be mentioned. Moreover, you may mix | blend and use well-known additives, such as a plasticizer, antioxidant, and a stabilizer with resin as needed.

  The infection prevention film of this embodiment can be obtained, for example, by applying an adhesive to the base film obtained as described above with a comma coater or gravure coater, winding it after drying, and aging at 40 ° C. for 2 days. it can. Before applying the pressure-sensitive adhesive, a primer having an affinity for the pressure-sensitive adhesive layer and the base material layer may be applied in advance, or corona treatment, plasma treatment or the like may be applied to adjust the surface tension of the base material film. Moreover, you may form a release layer in the back surface of a base film in the process before and behind adhesive coating.

[Infection prevention film roll]
The wound body for infection prevention film of this embodiment includes a core tube and the above-described infection prevention film wound around the core tube.

(Core tube)
The material of the core tube is not limited, and for example, paper, plastic, metal, or the like can be used. The core tube may be a hollow cylindrical object or a non-hollow cylindrical object. Moreover, there is no limitation in the diameter of a core pipe, For example, it can be 10 mm-50 mm.

  The pulling force for pulling out the infection prevention film from the wound body of the infection prevention film is preferably 30 to 300 cN / 220 mm width, more preferably 35 to 250 cN / 220 mm width, and further preferably 40 to 200 cN / 220 mm width. . When the pulling power is within the above range, a necessary amount of the infection prevention film can be pulled out with a light force.

  The method for controlling the pulling force for pulling out the infection prevention film from the core tube to the above range is not particularly limited. For example, in addition to setting the adhesive force of the infection prevention film, a release layer is provided on the back surface of the infection prevention film. Can be mentioned.

  In addition, in this embodiment, the pulling force which pulls out the infection prevention film from a core pipe can be measured by the method as described in the below-mentioned Example.

[Infection prevention film storage box]
The infection prevention film storage box of this embodiment is a box for storing the above-described infection prevention film roll, and the box includes a cutting tool for cutting the infection prevention film. By storing the wound body of the infection prevention film in a box, a necessary amount of the infection prevention film can be easily pulled out and cut.

EXAMPLES Next, although an Example and a comparative example are given and this invention is demonstrated more concretely, this invention is not limited to a following example, unless the summary is exceeded.
The measurement methods used in the examples and comparative examples were as follows.

(1) 2% strain elastic modulus of base film The 2% strain elastic modulus was measured as follows based on ASTM-D882. That is, the base film of each example was cut out to a width of 10 mm and a length of 100 mm along the MD and TD directions, respectively, as a sample, and measured at a tensile speed of 5 mm / min. A tangent line is drawn on the obtained stress-strain graph to calculate a value obtained by converting the stress value at the time of 2% elongation into the thickness of the sample, and the average value of five measurements is 2% strain in each of the MD direction and the TD direction. The value of elastic modulus was used. As the measuring device, AUTOGRAPH AG-IS manufactured by Shimadzu Corporation was used.

(2) Tensile elongation of base film Tensile elongation was measured as follows based on ASTM-D882. In other words, the base film of each example was cut into a width of 10 mm and a length of 100 mm along the MD and TD directions, respectively, as a sample, measured at a tensile speed of 300 mm / min, and stretched when broken. The average value of the measurements was taken as the value of tensile elongation in each of the MD direction and the TD direction. As the measuring device, AUTOGRAPH AG-IS manufactured by Shimadzu Corporation was used.

(3) Adhesive strength of adhesive layer The adhesive strength of the adhesive layer was measured as follows in accordance with JISZ0237. That is, the infection prevention film was cut into a width of 25 mm and a length of 300 mm along the MD direction as a sample, and was attached to a SUS304 mirror finish plate by reciprocating twice at 10 mm / second using a 2 kg weight roller. Tensile measurement was performed in the direction of 180 degrees from the SUS mirror-finished plate at a speed of 300 mm / min, and the average value of five measurements of the peel force was taken as the value of the adhesive force. For the measurement, AUTOGRAPH AG-IS manufactured by Shimadzu Corporation was used. The 180 degree peeling force obtained in this manner was used as the adhesive strength of the adhesive layer.

(4) Haze of infection prevention film
Haze was measured according to JISK7136. Specifically, diffuse transmittance and total light transmittance were measured, and Haze was calculated by the following formula. The average value of five measurements was taken as the value of Haze of the infection prevention film. For the measurement, a haze meter manufactured by Nippon Denshoku Industries Co., Ltd. was used.
Haze (%) = diffuse transmittance / total light transmittance × 100

(5) Thickness of base film The base film was cut using a microtome, and the cut surface was observed with an optical microscope (Keyence VHX-900) to measure the thickness of the base film. This was further measured every 1 m in the MD direction (unwinding direction) of the film, and the average value of 10 points was finally set as the thickness of the base film. In addition, the thickness of the adhesive layer is measured by observing with an optical microscope (Keyence VHX-900) in the same manner as the method for measuring the thickness of the base film, and further measured every 1 m in the MD direction (unwinding direction) of the film. Finally, the average value of 10 points was taken as the thickness of the adhesive layer.

(6) Critical surface tension of substrate film at 20 ° C. The critical surface tension of substrate film at 20 ° C. was determined by Zisman plot as follows. The contact angle for a liquid having a known surface tension used in the Zisman plot was measured, and the surface tension was plotted on the x-axis and the cos θ of the contact angle plotted on the y-axis. The value obtained by extrapolating the straight line obtained based on the above plot to cos θ = 1 was defined as the critical surface tension. As the liquid having a known surface tension, n-alkanes such as heptane, decane, alcohols such as ethanol, ethylene glycol, and alkyl halides such as 1-chlorohexane and 1-chlorooctane were used. For the measurement, a contact angle meter DM-501 manufactured by Kyowa Interface Science Co., Ltd. was used.

(7) Pull-out force for drawing out the infection-preventing film A sample obtained by winding a 220-mm-wide infection-preventing film on a paper tube by 10 m was aged at 28 ° C. for 1 week. Acrylic cylinder and 12mm diameter steel rod are fitted into a rotatable fixture connected via a bearing, the steel rod is fixed to a tensile tester, and the acrylic cylinder and paper tube winding prevention film rotate freely. I was able to do it. The end of the infection prevention film is fixed to a plate with a width of 250 mm that is directly connected to the load cell of the tensile tester, and the load generated when the infection prevention film is pulled out at a speed of 1000 mm / min is used as the pulling force. The value was taken as the measured value. The trade name “AUTOGRAPH AG-IS” (manufactured by Shimadzu Corporation) was used for the measurement.

(8) Durability of infection prevention film, incorrect input When using the infection prevention film obtained in the examples and comparative examples as a keyboard cover, type 20,000 characters in random Japanese text by repeatedly touching the keys. And evaluated. Regarding durability, the durability was evaluated as follows by catching and breaking the corner of the key.
<Durability evaluation criteria>
○: Less than 5 stretched parts.
(Triangle | delta): The stretched part is 5 or more places.
X: One or more portions where a part of the film is stretched and torn.

The incorrect input by the peripheral keys at the time of key touch was evaluated as follows.
<Evaluation criteria for erroneous input>
○: Input error 100 characters or less.
Δ: Input error 101 to 200 characters.
×: Input error 201 characters or more.

[Example 1]
[Manufacture of base film]
High pressure method low density polyethylene (PE, density 0.921 g / cm ³ , MI 0.4 g / 10 min) was extruded into a cylindrical shape by a melt extruder to form an inflation bubble and wound up to prepare a base film.

[Manufacture of infection prevention films]
On the base film obtained as described above, an acrylic pressure-sensitive adhesive (main agent: X-314 (100 parts by mass), curing agent: K-315 (1.5 parts by mass), manufactured by Syden Chemical Co., Ltd. ) Was coated with a comma coater at a thickness of 16.5 μm and aged at 40 ° C. for 2 days to form an adhesive layer. After that, long-chain alkyl pendant polymer (Pyrole 1050 manufactured by Lion Specialty Chemicals Co., Ltd.) is applied to the surface on which the adhesive layer of the base film is not formed using a gravure coater at a thickness of 0.2 μm. Then, a release layer was formed to obtain an infection prevention film. The characteristics of the obtained infection prevention film were measured as described above. The measurement results are shown in Table 1.

[Manufacture of wound film for preventing infection]
By slitting the infection prevention film (width: 500 mm, length: 300 m) produced as described above to a width of 220 mm and winding the infection prevention film for a length of 10 m in the flow direction on a cylindrical core tube An anti-infection film roll was produced. In the obtained infection prevention film roll, the pulling force of the film was 180 cN / 220 mm width.

[Examples 2 to 4]
Except that the mass ratio of the main agent and the curing agent in the acrylic adhesive constituting the adhesive layer, or the thickness of the adhesive layer was changed as shown in Table 1, an infection prevention film was produced in the same manner as in Example 1, An anti-infection film roll was produced.

[Examples 5 and 6]
In Example 5, a rubber adhesive (weakly adhesive grade) was used instead of the acrylic adhesive, and in Example 6, a rubber adhesive (strong adhesive grade) was used instead of the acrylic adhesive. Manufactured the infection prevention film similarly to Example 1, and manufactured the infection prevention film winding body.

[Example 7]
High-pressure low-density polyethylene (PE, density 0.921 g / cm ³ , MI 0.4 g / 10 min) and ethylene / vinyl acetate copolymer (EVA) are extruded into a cylindrical shape from a multilayer die with a melt extruder and inflation bubbles And wound up to prepare a base film. The obtained base film was used as an infection prevention film. In addition, in the infection prevention film of Example 7, the layer which consists of an ethylene-vinyl acetate copolymer turns into an adhesion layer.

[Comparative Example 1]
Polyethylene terephthalate (PET) was extruded with a melt extruder and biaxially stretched to prepare a base film having a thickness of 25 μm. On the obtained base film, an acrylic pressure-sensitive adhesive (main agent: X-314 (100 parts by mass), curing agent: K-315 (1.5 parts by mass), manufactured by Seiden Chemical Co., Ltd.) is 16.5 μm. The pressure-sensitive adhesive layer was formed by coating with a comma coater at a thickness of 40 ° C. and aging at 40 ° C. for 2 days. Then, apply a long chain alkyl pendant polymer (Pyrole 1050 made by Lion Specialty Chemicals Co., Ltd.) to the surface of the base film where the adhesive layer is not formed using a gravure coater. Then, a release layer was formed to obtain an infection prevention film.

[Comparative Example 2]
After kneading using a two-part silicone elastomer, the sheet was allowed to stand overnight to produce a 0.1 mm thick sheet to obtain a base film. The obtained base film was directly used as an infection prevention film without forming an adhesive layer.

  The infection prevention film of the present invention has industrial applicability as an interface protection material such as a keyboard cover, particularly in a medical field.

Claims (6)

An infection prevention film having a base film, and an adhesive layer disposed on the base film,
2% strain elastic modulus in the flow direction (MD direction) and the width direction (TD direction) of the base film is each independently 150 to 350 MPa,
The tensile elongation in the flow direction (MD direction) and the width direction (TD direction) of the base film is independently 210 to 1000%,
The adhesive force of the adhesive layer (JIS 0237 compliant 180 degree peeling force) is 0.01 to 0.5 N / 25 mm,
The thickness of the infection prevention film is 10 to 80 μm.
Infection prevention film. The Haze of the infection prevention film is 0.1 to 25%.
The infection prevention film according to claim 1. The base film contains polyethylene as a main component,
The infection prevention film according to claim 1 or 2. A infection prevention film according to any one of claims 1 to 3 wound around the core tube and the core tube,
Infection prevention film roll. The pulling force for pulling out the infection prevention film from the infection prevention film roll is 30 to 300 cN / 220 mm width,
The wound film for preventing infection according to claim 4. The infection prevention film roll according to claim 4 or 5, and a box for storing the infection prevention film roll,
The box comprises a cutting tool for cutting the infection-preventing film;
Infection prevention film storage box.