阅读说明：本技术 制程保护膜及其制备方法 (Process protective film and preparation method thereof ) 是由 候鹏飞 于 2020-07-06 设计创作，主要内容包括：本发明属于保护膜技术领域,尤其涉及一种制程保护膜及其制备方法,该制程保护膜包括PPET复合膜和离型膜；所述PPET复合膜包括抗菌PP膜、PET膜和透气抗菌胶膜,所述PET膜设置有上下对称的第一端面和第二端面,所述抗菌PP膜设置在所述第一端面上,所述透气抗菌胶膜设置在所述第二端面上；所述离型膜粘附在所述透气抗菌胶膜远离所述第二端面的一端且用于防止所述透气抗菌胶膜在进入口罩生产线前受异物污染。本发明的有益效果在于：能够充分保护制程中的口罩的同时,结构简单,操作简便,有效地防止生产环境中的异物污染口罩,进而提高产品质量。(The invention belongs to the technical field of protective films, and particularly relates to a process protective film and a preparation method thereof, wherein the process protective film comprises a PPET composite film and a release film; the PPET composite film comprises an antibacterial PP film, a PET film and a breathable antibacterial adhesive film, wherein the PET film is provided with a first end face and a second end face which are symmetrical up and down, the antibacterial PP film is arranged on the first end face, and the breathable antibacterial adhesive film is arranged on the second end face; the release film is adhered to one end, far away from the second end face, of the breathable antibacterial adhesive film and is used for preventing the breathable antibacterial adhesive film from being polluted by foreign matters before entering the inlet hood production line. The invention has the beneficial effects that: the mask in the manufacturing process can be fully protected, the structure is simple, the operation is simple and convenient, foreign matters in the production environment are effectively prevented from polluting the mask, and the product quality is further improved.)

1. The utility model provides a preparation protection film, is applicable to on the gauze mask production line, preparation protection film can remove the adhesion in the surface of the gauze mask on the gauze mask production line, its characterized in that includes:

the PPET composite film comprises an antibacterial PP film, a PET film and a breathable antibacterial adhesive film, wherein the PET film is provided with a first end face and a second end face which are symmetrical up and down, the antibacterial PP film is arranged on the first end face, and the breathable antibacterial adhesive film is arranged on the second end face;

and the release film is adhered to one end, far away from the second end face, of the breathable antibacterial adhesive film and is used for preventing the breathable antibacterial adhesive film from being polluted by foreign matters before entering the inlet hood production line.

2. The method for preparing a process protective film as claimed in claim 1, wherein: the method comprises the following steps:

s100: calcining the nano-silver sol at 180-250 ℃ for 1-3 h to obtain nano-silver powder; mixing the nano silver powder with an antibacterial PP film raw material, and performing melt extrusion to obtain the antibacterial PP film;

s200: preparing PET resin, metal aluminum fiber and Arabic gum into an outer-layer film by adopting a stretching method;

s300: preparing PET resin, a crystal nucleus promoter and carbon nano tubes into a middle layer film by adopting a stretching method;

s400: preparing PET resin, zinc oxide and epoxidized soybean oil into an inner layer film by adopting a tape casting method;

s500: sequentially compounding the outer layer film, the middle layer film and the inner layer film to form the PET film, and compounding the PET film on the antibacterial PP film;

s600: discharging the base material from the cloth discharging device; coating the medical pressure-sensitive adhesive on the front surface of the base material in a blade mode; high-pressure air is blown out from the micropores on the negative pressure device, the high-pressure air is blown towards the back surface of the base material, and the medical pressure-sensitive adhesive on the front surface of the base material forms densely distributed fine air holes by blowing the high-pressure air from the back surface of the base material; then the mixture enters an oven to be dried to form the breathable antibacterial adhesive film;

s700: compounding the breathable antibacterial cornea on the PET film, and adhering the release film on the breathable antibacterial adhesive film;

s800: and rolling the dried membrane structure by using a rolling device.

3. The method for preparing a process protection film according to claim 2, wherein: in step S600, the viscosity value of the medical pressure-sensitive adhesive is greater than 3200 CPS.

4. The method for preparing a process protection film according to claim 2, wherein: in step S800, the solvent evaporation amount in the medical pressure-sensitive adhesive is controlled to be 40% to 60% by drying.

5. The method for preparing a process protection film according to claim 2, wherein: in step S600, the pressure of the high-pressure air is 8 to 10 MPa.

6. The method for preparing a process protection film according to claim 2, wherein: in step S600, the base material is a plain woven fabric.

7. The method for preparing a process protection film according to claim 2, wherein: in step S600, the medical pressure-sensitive adhesive is a solvent-based rubber pressure-sensitive adhesive or a solvent-based acrylate pressure-sensitive adhesive.

8. The method for preparing a process protection film according to claim 2, wherein: in step S200, the raw materials for preparing the outer layer film and the parts by weight thereof are: 2-5 parts of Arabic gum, 70-100 parts of resin and 2-4 parts of aluminum fiber; in S300, the raw materials for preparing the middle layer film and the parts by weight thereof are as follows: 150-170 parts of resin, 1-2 parts of accelerant and 2-3 parts of carbon nano tube; in step S400, the inner layer film is prepared from the following raw materials in parts by weight: 50-80 parts of resin, 2-5 parts of zinc oxide and 3-8 parts of epoxidized soybean oil.

9. The method for preparing a process protection film according to claim 2, wherein: in step S100, the antibacterial PP film comprises the following raw materials in parts by weight: 50-80 parts of polypropylene, 10-20 parts of vinyl tert-butyl hydroperoxide silane, 1-10 parts of nano silver powder and 1-10 parts of an auxiliary agent.

Technical Field

The invention belongs to the technical field of protective films, and particularly relates to a manufacturing protective film and a preparation method thereof.

Background

The mask equipment utilizes a high-temperature hot-press forming principle to firmly form the workpiece. This gauze mask make-up machine can accomplish automatically from the pay-off to a plurality of processes such as one shot forming, shearing and material returned, compares traditional artifical pay-off, material returned, the shearing can save 3 ~ 5 manual works, and every minute can produce 30 ~ 36 gauze masks, adopts PLC control system, and the touch-sensitive screen setting, easy operation is swift, but single unit use only needs artifical blowing and gets the material. Greatly improving the production efficiency.

Disclosure of Invention

The invention aims to provide a manufacturing protective film and a preparation method thereof, and aims to solve the technical problem that a mask in the prior art is easily polluted by foreign matters in a working environment in a production process.

In order to achieve the above object, the process protection film provided by the embodiment of the invention is suitable for a mask production line, and the process protection film is removably adhered to the surface of a mask on the mask production line and comprises a PPET composite film and a release film; the PPET composite film comprises an antibacterial PP film, a PET film and a breathable antibacterial adhesive film, wherein the PET film is provided with a first end face and a second end face which are symmetrical up and down, the antibacterial PP film is arranged on the first end face, and the breathable antibacterial adhesive film is arranged on the second end face; the release film is adhered to one end, far away from the second end face, of the breathable antibacterial adhesive film and is used for preventing the breathable antibacterial adhesive film from being polluted by foreign matters before entering the inlet hood production line.

One or more technical solutions in the process protection film provided by the embodiment of the invention have at least one of the following technical effects: the working principle of the process protective film is as follows: when the protective film is needed, tearing the release film away from the breathable antibacterial adhesive film, and attaching the PPET composite film to the surface to be protected of the mask; compared with the technical problems that the mask is easily polluted by foreign matters in the production process and the product quality is influenced due to the fact that an effective protection measure is lacked in a mask production line in the prior art, the process protection film provided by the embodiment of the invention adopts the release structure, can fully protect the mask in the process, is simple in structure and convenient to operate, effectively prevents the mask from being polluted by the foreign matters in the production environment, and further improves the product quality.

In order to achieve the above object, the present invention provides a method for preparing the process protection film, comprising the following steps:

s100: calcining the nano-silver sol at 180-250 ℃ for 1-3 h to obtain nano-silver powder; mixing the nano silver powder with an antibacterial PP film raw material, and performing melt extrusion to obtain the antibacterial PP film;

s200: preparing PET resin, metal aluminum fiber and Arabic gum into an outer-layer film by adopting a stretching method;

s300: preparing PET resin, a crystal nucleus promoter and carbon nano tubes into a middle layer film by adopting a stretching method;

s400: preparing PET resin, zinc oxide and epoxidized soybean oil into an inner layer film by adopting a tape casting method;

s500: sequentially compounding the outer layer film, the middle layer film and the inner layer film to form the PET film, and compounding the PET film on the antibacterial PP film;

s600: discharging the base material from the cloth discharging device; coating the medical pressure-sensitive adhesive on the front surface of the base material in a blade mode; high-pressure air is blown out from the micropores on the negative pressure device, the high-pressure air is blown towards the back surface of the base material, and the medical pressure-sensitive adhesive on the front surface of the base material forms densely distributed fine air holes by blowing the high-pressure air from the back surface of the base material; then the mixture enters an oven to be dried to form the breathable antibacterial adhesive film;

s700: compounding the breathable antibacterial cornea on the PET film, and adhering the release film on the breathable antibacterial adhesive film;

s800: and rolling the dried membrane structure by using a rolling device.

Optionally, in step S600, the viscosity value of the medical pressure-sensitive adhesive is greater than 3200 CPS.

Optionally, in step S800, drying is performed to control the solvent volatilization amount in the medical pressure-sensitive adhesive to be 40% to 60%.

Optionally, in step S600, the pressure of the high-pressure air is 8-10 MPa.

Optionally, in step S600, the base material is a plain woven fabric.

Optionally, in step S600, the medical pressure-sensitive adhesive is a solvent-based rubber pressure-sensitive adhesive or a solvent-based acrylate pressure-sensitive adhesive.

Optionally, in step S200, the raw materials for preparing the outer layer film and the parts by weight thereof are: 2-5 parts of Arabic gum, 70-100 parts of resin and 2-4 parts of aluminum fiber; in S300, the raw materials for preparing the middle layer film and the parts by weight thereof are as follows: 150-170 parts of resin, 1-2 parts of accelerant and 2-3 parts of carbon nano tube; in S400, the inner layer film is prepared from the following raw materials in parts by weight: 50-80 parts of resin, 2-5 parts of zinc oxide and 3-8 parts of epoxidized soybean oil.

Optionally, in step S100, the antibacterial PP film comprises, by weight: 50-80 parts of polypropylene, 10-20 parts of vinyl tert-butyl hydroperoxide silane, 1-10 parts of nano-silver powder and 1-10 parts of an auxiliary agent.

One or more technical solutions of the preparation method of the process protection film provided by the embodiment of the invention have at least one of the following technical effects: the preparation method can produce the process protective film, and the working principle of the process protective film is as follows: when the protective film is needed, tearing the release film away from the breathable antibacterial adhesive film, and attaching the PPET composite film to the surface to be protected of the mask; compared with the technical problems that the mask is easily polluted by foreign matters in the production process and the product quality is influenced due to the fact that an effective protection measure is lacked in a mask production line in the prior art, the process protection film provided by the embodiment of the invention adopts the release structure, can fully protect the mask in the process, is simple in structure and convenient to operate, effectively prevents the mask from being polluted by the foreign matters in the production environment, and further improves the product quality.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a schematic structural diagram of a process protection film according to an embodiment of the present invention.

Fig. 2 is a schematic structural view of the release film of the process protection film in fig. 1.

Fig. 3 is a flowchart of a method for manufacturing a protective film according to an embodiment of the invention.

Wherein, in the figures, the respective reference numerals:

10-release film 20-PPET composite film 21-antibacterial PP film

22-PET film 23-breathable antibacterial adhesive film.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to fig. 1-3 are exemplary and intended to be used to illustrate embodiments of the invention, and should not be construed as limiting the invention.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In an embodiment of the present invention, as shown in fig. 1 to 3, a process protection film is provided, which is suitable for a mask production line, and the process protection film is removably adhered to a surface of a mask on the mask production line, and includes a PPET composite film 10 and a release film 20; the PPET composite film 10 comprises an antibacterial PP film 21, a PET film 22 and a breathable antibacterial adhesive film 23, wherein the PET film 22 is provided with a first end face and a second end face which are symmetrical up and down, the antibacterial PP film 21 is arranged on the first end face, and the breathable antibacterial adhesive film 23 is arranged on the second end face; the release film 20 is adhered to one end of the air-permeable antibacterial adhesive film 23 far away from the second end face and is used for preventing the air-permeable antibacterial adhesive film 23 from being polluted by foreign matters before entering a mask production line; the release film 20 is a PET high polymer material film.

Specifically, the working principle of the process protective film is as follows: when the protective film is needed, tearing the release film 20 away from the breathable antibacterial adhesive film 23, and attaching the PPET composite film 10 to the surface to be protected of the mask; compared with the technical problems that the mask is easily polluted by foreign matters in the production process and the product quality is influenced due to the fact that an effective protection measure is lacked in a mask production line in the prior art, the process protection film provided by the embodiment of the invention adopts the release structure, can fully protect the mask in the process, is simple in structure and convenient to operate, effectively prevents the mask from being polluted by the foreign matters in the production environment, and further improves the product quality.

As shown in fig. 3, another embodiment of the present invention provides a method for preparing the process protection film, including the following steps:

s100: calcining the nano-silver sol at 180-250 ℃ for 1-3 h to obtain nano-silver powder; mixing the nano silver powder with the raw material of the antibacterial PP film 21, and performing melt extrusion to obtain the antibacterial PP film 21;

s200: preparing PET resin, metal aluminum fiber and Arabic gum into an outer-layer film by adopting a stretching method;

s300: preparing PET resin, a crystal nucleus promoter and carbon nano tubes into a middle layer film by adopting a stretching method;

s400: preparing PET resin, zinc oxide and epoxidized soybean oil into an inner layer film by adopting a tape casting method;

s500: sequentially compounding the outer layer film, the middle layer film and the inner layer film to form the PET film 22, and compounding the PET film 22 on the antibacterial PP film 21;

s600: discharging the base material from the cloth discharging device; coating the medical pressure-sensitive adhesive on the front surface of the base material in a blade mode; high-pressure air is blown out from the micropores on the negative pressure device, the high-pressure air is blown towards the back surface of the base material, and the medical pressure-sensitive adhesive on the front surface of the base material forms densely distributed fine air holes by blowing the high-pressure air from the back surface of the base material; then the mixture enters an oven to be dried to form the breathable antibacterial adhesive film 23;

s700: compounding the breathable antibacterial cornea on the PET film 22, and adhering the release film 20 on the breathable antibacterial adhesive film 23;

s800: and rolling the dried membrane structure by using a rolling device.

Specifically, the preparation method can produce the process protection film, and the working principle of the process protection film is as follows: when the protective film is needed, tearing the release film 20 away from the breathable antibacterial adhesive film 23, and attaching the PPET composite film 10 to the surface to be protected of the mask; compared with the technical problems that the mask is easily polluted by foreign matters in the production process and the product quality is influenced due to the fact that an effective protection measure is lacked in a mask production line in the prior art, the process protection film provided by the embodiment of the invention adopts the release structure, can fully protect the mask in the process, is simple in structure and convenient to operate, effectively prevents the mask from being polluted by the foreign matters in the production environment, and further improves the product quality.

The front surface of the base material is coated with the solvent type medical pressure-sensitive adhesive in a scraping mode, before the solvent type medical pressure-sensitive adhesive is completely dried, high-pressure air is blown and jetted on the back surface of the base material, so that the problem that the medical adhesive tape is poor in ventilation is solved due to the fact that countless fine air holes are formed in the front medical pressure-sensitive adhesive surface of the base material, the adhesive coating surface with the air holes is adopted to replace a full adhesive coating surface, the air permeability of a product can be improved, and the quality of the process protective film is further improved.

Meanwhile, the film is formed by compounding an outer film, a middle film and an inner film; wherein, the raw materials for preparing the outer layer film are as follows: PET resin, metal aluminum fiber and Arabic gum; the raw materials for preparing the middle layer film are as follows: PET resin, a crystal nucleus promoter and carbon nano tubes; the raw materials for preparing the inner layer film are as follows: PET resin, zinc oxide and epoxidized soybean oil; the PET film prepared from the raw materials has high structural strength and high stability, and further the quality of the product is improved.

In another embodiment of the present invention, in step S600, the viscosity value of the medical pressure-sensitive adhesive is greater than 3200 CPS; specifically, the viscosity of 3200CPS or above is favorable for stable bonding and forming of the medical pressure-sensitive adhesive and the base material, and the stability of the breathable antibacterial adhesive film 23 is improved.

In another embodiment of the present invention, in step S800, the solvent evaporation amount in the medical pressure-sensitive adhesive is controlled to be 40% to 60% by drying; specifically, the solvent volatilization amount of 40-60% is favorable for maintaining the stability of the membrane structure of the medical pressure-sensitive adhesive, and the stability of the breathable antibacterial adhesive membrane 23 is further improved.

In another embodiment of the present invention, in step S600, the pressure of the high pressure air is 8 to 10 MPa; specifically, high-pressure air with the air pressure of 8-10 MPa is adopted, air holes with preset apertures can be generated, the air permeability of the air-permeable antibacterial adhesive film 23 is improved, and the protective performance of the processing protective film is improved.

In another embodiment of the present invention, in step S600, the base material is a plain weave fabric, and the plain weave fabric is a technically formed and technically mature structure, for example, yarns of the plain weave fabric are pure cotton yarns or chemical fiber yarns, which is not described in detail in this embodiment, and is used for manufacturing the base material, so as to be beneficial to improving the structural strength of the base material and further improving the stability of the air-permeable antibacterial adhesive film 23.

In another embodiment of the present invention, in step S600, the medical pressure sensitive adhesive is a solvent-based rubber pressure sensitive adhesive or a solvent-based acrylate pressure sensitive adhesive.

In another embodiment of the present invention, in step S200, the raw materials for preparing the outer layer film and the parts by weight thereof are: 2-5 parts of Arabic gum, 70-100 parts of resin and 2-4 parts of aluminum fiber; in S300, the raw materials for preparing the middle layer film and the parts by weight thereof are as follows: 150-170 parts of resin, 1-2 parts of accelerant and 2-3 parts of carbon nano tube; in S400, the inner layer film is prepared from the following raw materials in parts by weight: 50-80 parts of resin, 2-5 parts of zinc oxide and 3-8 parts of epoxidized soybean oil; specifically, the preparation raw materials and the parts by weight thereof are beneficial to a high-speed printing process, effectively reduce the production cost and further improve the product quality.

In another embodiment of the present invention, the raw materials for preparing the outer layer film and the parts by weight thereof are: 70 parts of PET resin, 2 parts of aluminum fiber and 2 parts of Arabic gum; the raw materials for preparing the middle layer film and the parts by weight thereof are as follows: 150 parts of PET resin, 1 part of graphite and 2 parts of carbon nano tubes; the inner layer film is prepared from the following raw materials in parts by weight: 50 parts of PET resin, 2 parts of zinc oxide and 3 parts of epoxidized soybean oil.

Wherein the molecular weight of the PET resin is 14000, and the melt index measured according to GB-T3682 at 190 ℃ and 22Kg is 300g/10 min; the average diameter of the metallic aluminum fibers is 0.4 μm; the average diameter of the carbon nanotubes was 18 nm.

In another embodiment of the present invention, the raw materials for preparing the outer layer film and the parts by weight thereof are: 100 parts of PET resin, 4 parts of aluminum fiber and 5 parts of Arabic gum; the raw materials for preparing the middle layer film and the parts by weight thereof are as follows: 170 parts of PET resin, 2 parts of zinc stearate and 3 parts of carbon nano tubes; the inner layer film is prepared from the following raw materials in parts by weight: 80 parts of PET resin, 5 parts of zinc oxide and 8 parts of epoxidized soybean oil.

Wherein the molecular weight of the PET resin is 30000, and the melt index measured at 190 ℃ and 22Kg according to GB-T3682 is 500g/10 min; the average diameter of the aluminum fibers was 3 μm; the average diameter of the carbon nanotubes was 90 nm.

In another embodiment of the present invention, the raw materials for preparing the outer layer film and the parts by weight thereof are: 85 parts of PET resin, 3 parts of aluminum fiber and 3.5 parts of Arabic gum; the raw materials for preparing the middle layer film and the parts by weight thereof are as follows: 160 parts of PET resin, 1.5 parts of titanium dioxide and 1.5 parts of carbon nano tubes; the inner layer film is prepared from the following raw materials in parts by weight: 65 parts of PET resin, 3.5 parts of zinc oxide and 5.5 parts of epoxidized soybean oil.

Wherein the molecular weight of the PET resin is 23000, and the melt index measured according to GB-T3682 at 190 deg.C and 22Kg is 430g/10 min; the average diameter of the metallic aluminum fibers is 2.5 μm; the average diameter of the carbon nanotubes was 45 nm.

In another embodiment of the present invention, in step S100, the antibacterial PP film 21 comprises the following raw materials in parts by weight: 50-80 parts of polypropylene, 10-20 parts of vinyl tert-butyl hydroperoxide silane, 1-10 parts of nano silver powder and 1-10 parts of an auxiliary agent.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.