A kind of foam material, preparation method and mask

Abstract

The application provides a kind of foam material, preparation method and mask, the preparation method of foam material includes: after stirring first preset time by adding mixed material into stirring barrel, it is stationary second preset time, to form foam raw material;Foam raw material is coated on high-temperature release paper once, to carry out first foaming treatment with first foaming condition, to form first layer on high-temperature release paper;Foam raw material is coated on first layer twice, to carry out second foaming treatment with second foaming condition, to form second layer on first layer, to obtain the material to be processed;The cooling treatment is carried out to the material to be processed, to obtain foam material.Because the double layer that constitutes foam material is foamed, the softness of the foam material after forming is better, which effectively improves the skin feeling, because of the difference between time and temperature, the larger, more breathable air bubble hole is formed between the first layer and the second layer, which improves the breathability of the foam material.

Description

Technical Field

[0001] This invention relates to the field of medical device processing technology, and in particular to a foam material, a preparation method, and a mask. Background Technology

[0002] Masks are mostly made of one or more layers of nonwoven fabric composites. The main production processes include meltblown, spunbond, hot air or needle punching, etc. They have the effect of resisting liquids, filtering particulate matter and bacteria, and are a kind of medical protective textile.

[0003] During use, the mask needs to be secured to the mouth and nose with the straps on both sides, and then the nose strip on the mask should be used to fit the nose to complete the overall fixation. The side edges of the mask come into direct contact with the skin. After the mask is secured, the tension of the straps will leave marks on the skin around the mouth and nose, affecting the comfort of wearing it.

[0004] Currently, a ring-shaped nose pad is usually placed on the side edge of the mask, which is the part of the mask that comes into contact with the skin, to improve wearing comfort. However, the existing nose pads are generally made of materials such as polyester fabric and polyether sponge, which have defects such as poor skin feel and poor breathability, affecting the user's experience. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the present invention aims to provide a foam material, a preparation method, and a mask, which solves the technical problem that the nose pad layer made of materials such as polyester fabric and polyether sponge, designed to improve user comfort, suffers from poor skin feel and poor breathability, thus affecting the user's experience.

[0006] To achieve the above objectives, in a first aspect, the present invention provides a method for preparing a foam material, comprising the following steps:

[0007] The mixture is added to a mixing tank and stirred for a first preset time, then left to stand for a second preset time to form foam raw material.

[0008] The foam material is coated onto high-temperature release paper once, and then foamed under first foaming conditions to form a first layer on the high-temperature release paper.

[0009] The foam raw material is coated a second time on the first layer, and then subjected to a second foaming treatment under the second foaming conditions to form a second layer on the first layer. The high-temperature release paper, the first layer, and the second layer constitute the material to be treated.

[0010] The material to be processed is cooled to obtain foam material, which is then rolled up for later use.

[0011] Furthermore, the mixture comprises the following raw materials by weight: 100 parts of paste resin powder, 30 to 65 parts of plasticizer, 2 to 5 parts of dioctyl oxalate, 2 to 5 parts of trioctyl trimellitate, 3 parts of resin color paste, 0.5 to 2.5 parts of potassium zinc stabilizer, 0.5 to 2 parts of barium zinc stabilizer, 0.5 to 2 parts of viscosity reducer, and 2 to 6 parts of foaming agent.

[0012] Furthermore, the plasticizer is tributyl acetylcitrate.

[0013] Furthermore, the first preset time is 20 min to 25 min, and the second preset time is 3 h to 5 h.

[0014] Furthermore, the step of performing a single foaming treatment under the first foaming condition specifically includes:

[0015] The high-temperature release paper after one coating is placed in the first transmission section of the production line. The length of the first transmission section is 15m to 20m, the transmission speed of the first transmission section is 10m / min to 20m / min, and the temperature of the first transmission section is 180℃ to 210℃.

[0016] The specific steps of performing secondary foaming treatment under the second foaming conditions are as follows:

[0017] The high-temperature release paper after secondary coating is placed in the second transmission section of the production line. The length of the second transmission section is 15m to 20m, the transmission speed of the second transmission section is 10m / min to 20m / min, and the temperature of the second transmission section is 190℃ to 220℃.

[0018] The step of cooling the material to be treated includes:

[0019] The material to be processed is placed in the third transmission section of the production line, and the third transmission section is equipped with a chiller loaded with cooling water and a cooling roller movably connected to the chiller.

[0020] The temperature of the cooling water is lower than the first cooling temperature, so that the surface temperature of the cooling roller is lower than the second cooling temperature, and the material to be treated is cooled by the cooling roller.

[0021] Furthermore, the first cooling temperature is -10°C, and the second cooling temperature is 1°C.

[0022] Furthermore, the thickness of the first coating is 0.2mm to 0.7mm, the thickness of the second coating is 0.1mm to 0.4mm, the thickness of the first layer is 0.5mm to 3.0mm, and the thickness of the second layer is 0.6mm to 2.5mm.

[0023] Secondly, the present invention provides a foam material, which is prepared by the foam material preparation method described in the first aspect above.

[0024] Thirdly, the present invention provides a face mask, comprising a nose bridge strip and a nose pad layer prepared from the foam material described in the second aspect by a predetermined production method.

[0025] Furthermore, the preset production method includes the following steps:

[0026] Unroll the prepared foam material and cut it into several first spare layers and several second spare layers according to the first preset size and the second preset size.

[0027] An adhesive is coated onto the glassine release paper, and the glassine release paper is baked to allow the adhesive to dry and form a film.

[0028] The first spare layer and the ragxin release paper are bonded together by the adhesive to form a first model, and the first model is stamped to obtain a nose bridge strip;

[0029] The second spare layer and the ragxin release paper are bonded together by the adhesive to form a second model. Nose and mouth openings are made on the second model, and the second model after the nose and mouth openings are made is stamped to obtain the nose pad layer.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows: In the preparation method described in the first aspect, the mixture is mixed to form the foam raw material, which is then foamed once to form the first layer. The foam raw material is then coated again on the first layer and subjected to a second foaming treatment. Since both layers constituting the foam material have undergone foaming treatment, the foam material after molding has better softness, effectively improving the skin feel. At the same time, due to the time and temperature difference, larger and more breathable air bubbles are formed between the first layer and the second layer, improving the breathability of the foam material. The foam material prepared by the preparation method described in the first aspect, when used as the nose pad layer on a mask, can also bring about the effects of improving the skin feel and breathability. Attached Figure Description

[0031] Figure 1 This is a flowchart of the preparation method of foam material in Embodiment 1 of the present invention;

[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate the present invention. Detailed Implementation

[0033] To facilitate understanding of the present invention, a more complete description will be given below with reference to the accompanying drawings. Several embodiments of the invention are illustrated in the drawings. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

[0034] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] Please see Figure 1 In a first aspect, Embodiment 1 of the present invention provides a method for preparing a foam material, comprising the following steps:

[0037] S10: Add the mixture to the mixing tank, stir it in the mixing tank for a first preset time, and then let it stand for a second preset time to form foam raw material;

[0038] The mixture comprises the following raw materials by weight: 100 parts of paste resin powder, 30 parts of plasticizer, 2 parts of dioctyl oxalate, 2 parts of trioctyl trimellitate, 3 parts of resin color paste, 0.5 parts of potassium zinc stabilizer, 0.5 parts of barium zinc stabilizer, 0.5 parts of viscosity reducer, and 2 parts of foaming agent.

[0039] It should be noted that any color of the resin pigment can be selected according to the actual color requirements.

[0040] The plasticizer is an environmentally friendly plasticizer. In this embodiment, the plasticizer is tributyl acetylacetate. Preferably, the first preset time is 20 min to 25 min, and the second preset time is 3 h to 5 h. In this embodiment, the first preset time is 22 min, and the second preset time is 4 h.

[0041] S20: The foam raw material is coated once on high-temperature release paper, and foamed once under the first foaming conditions to form a first layer on the high-temperature release paper;

[0042] Preferably, the thickness of the first coating is 0.2 mm to 0.7 mm, and in this embodiment, the thickness of the first coating is 0.5 mm.

[0043] Specifically, the high-temperature release paper after one coating is placed in the first transmission section of the production line, which is a high-temperature coating production line. A heating device, which is a boiler or a heating plate, is installed on the first transmission section.

[0044] Preferably, the length of the first transmission segment is 15m to 20m, and the transmission speed of the first transmission segment is 10m / min to 20m / min, that is, the time for the first foaming treatment is 0.75min to 2min. The high-temperature release paper coated on the first transmission segment is heated by the heating device to form the first layer. Preferably, the temperature of the first transmission segment is 180℃ to 210℃, and the thickness of the first layer is 0.5mm to 3.0mm. In this embodiment, the temperature of the first transmission segment is 190℃, and the thickness of the first layer is 1.8mm.

[0045] S30: The foam raw material is coated a second time on the first layer, and then foamed a second time under the second foaming conditions to form a second layer on the first layer. The high-temperature release paper, the first layer and the second layer constitute the material to be treated.

[0046] After the first layer is prepared, the foam material is coated again on the first layer. Preferably, the thickness of the second coating is 0.1 mm to 0.4 mm. In this embodiment, the thickness of the second coating is 0.3 mm.

[0047] Specifically, the high-temperature release paper after secondary coating is placed in the second transmission section of the production line. The second transmission section has the same structure as the first transmission section, that is, it is also used for high-temperature foaming, which will not be described in detail here.

[0048] The length of the second transmission segment is 15m to 20m, and the transmission speed of the second transmission segment is 10m / min to 20m / min, that is, the time of the secondary foaming process is 0.75min to 2min.

[0049] Preferably, the temperature of the second transmission segment is 190℃~220℃, and the thickness of the second layer is 0.6mm~2.5mm. In this embodiment, the temperature of the first transmission segment is 200℃, and the thickness of the second layer is 2.2mm.

[0050] S40: Cool the material to be processed to obtain foam material, and roll it up for later use.

[0051] Specifically, the material to be processed is placed in the third transmission section of the production line, and the third transmission section is equipped with a chiller loaded with cooling water and a cooling roller movably connected to the chiller.

[0052] The temperature of the cooling water is lower than the first cooling temperature, so that the surface temperature of the cooling roller is lower than the second cooling temperature, and the material to be treated is cooled by the cooling roller.

[0053] The first cooling temperature is -10℃, and the second cooling temperature is 1℃. When the material to be processed is placed on the third conveying section, the cooling water cools the cooling roller, and then the cooling roller comes into contact with the material to be processed to cool the material.

[0054] The mixture is combined to form the foam raw material, which is then foamed once to form the first layer. The foam raw material is then coated again on the first layer and subjected to a second foaming process. Since both layers of the foam material are foamed, the foam material after molding has better softness and effectively improves the skin feel. At the same time, due to the time and temperature difference, larger and more breathable air bubbles are formed between the first and second layers, improving the breathability of the foam material. The foam material obtained in this way can be used as the nose pad layer on a mask, which can also improve the skin feel and breathability.

[0055] Example 2 of this invention provides a method for preparing foam material, which differs from the method for preparing foam material described in Example 1 in that:

[0056] The mixture comprises the following raw materials by weight: 100 parts of paste resin powder, 65 parts of plasticizer, 5 parts of dioctyl oxalate, 5 parts of trioctyl trimellitate, 3 parts of resin color paste, 2.5 parts of potassium zinc stabilizer, 2 parts of barium zinc stabilizer, 2 parts of viscosity reducer, and 6 parts of foaming agent.

[0057] Example 3 of the present invention provides a method for preparing foam material, which differs from the method for preparing foam material described in Example 1 in that:

[0058] The mixture comprises the following raw materials by weight: 100 parts of paste resin powder, 50 parts of plasticizer, 3 parts of dioctyl oxalate, 4 parts of trioctyl trimellitate, 3 parts of resin color paste, 1.5 parts of potassium zinc stabilizer, 1.5 parts of barium zinc stabilizer, 1.5 parts of viscosity reducer, and 3 parts of foaming agent.

[0059] A second aspect of the present invention also provides an electrofoam material, which is prepared by the preparation method described in the above embodiments.

[0060] A third aspect of the present invention also provides a face mask, comprising a nose bridge strip and a nose pad layer prepared from the foam material described in the second aspect by a predetermined production method.

[0061] Understandably, the nose bridge strip and the nose pad layer, made of the foam material, possess the same comfort and breathability as the foam material, thereby enhancing the user experience of the mask.

[0062] Furthermore, the preset production method includes the following steps:

[0063] Unroll the prepared foam material and cut it into several first spare layers and several second spare layers according to the first preset size and the second preset size.

[0064] The first preset size includes a first length dimension and a first width dimension, wherein the first length dimension is 5mm to 50mm and the first width dimension is 1mm to 10mm. The second preset size includes a second length dimension and a second width dimension, wherein the second length dimension is 130mm to 180mm and the second width dimension is 130mm to 180mm.

[0065] An adhesive is coated onto the glassine release paper, and the glassine release paper is baked to allow the adhesive to dry and form a film.

[0066] Understandably, the adhesive is an environmentally friendly adhesive, preferably acrylic. The ragxin release paper coated with the adhesive is placed in a continuous oven for baking.

[0067] The first spare layer and the ragxin release paper are bonded together by the adhesive to form a first model, and the first model is stamped to obtain a nose bridge strip;

[0068] The second spare layer and the ragxin release paper are bonded together by the adhesive to form a second model. Nose and mouth openings are made on the second model, and the second model after the nose and mouth openings are made is stamped to obtain the nose pad layer.

[0069] It should be noted that the first model and the second model can be stamped into specific shapes according to actual needs.

[0070] After the nose bridge strip and the nose pad layer are manufactured, the nose bridge strip and the nose pad layer are bonded to non-woven fabric, meltblown fabric, or needle-punched cotton by high-frequency voltage welding or adhesive bonding to form the mask.

[0071] In some embodiments, the mask includes a mask body, fixing portions on opposite sides of the mask body, and a strap connecting the two fixing portions. The strap can fix the mask body to the mouth and nose. Further, a nose bridge strip is provided on the side of the mask body facing away from the mouth and nose, and the nose bridge strip corresponds to the nose bridge. A nose pad layer is provided on the side of the mask body facing the mouth and nose, and the nose pad layer surrounds the side edge of the mask body. Understandably, the nose pad layer has openings for the mouth and nose, and the nose pad layer comes into contact with the skin after the mask is worn.

[0072] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0073] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A method for preparing a foam material, characterized in that, Includes the following steps: The mixture is added to a mixing tank and stirred for a first preset time, then left to stand for a second preset time to form foam raw material. The mixture includes the following raw materials by weight: 100 parts of paste resin powder, 30-65 parts of plasticizer, 2-5 parts of dioctyl oxalate, 2-5 parts of trioctyl trimellitate, 3 parts of resin color paste, 0.5-2.5 parts of potassium zinc stabilizer, 0.5-2 parts of barium zinc stabilizer, 0.5-2 parts of viscosity reducer, and 2-6 parts of foaming agent. The plasticizer is tributyl acetylacetate. The foam material is coated onto high-temperature release paper once, and then foamed under first foaming conditions to form a first layer on the high-temperature release paper. The specific steps of performing a single foaming treatment under the first foaming condition are as follows: The high-temperature release paper after one coating is placed in the first transmission section of the production line. The length of the first transmission section is 15m to 20m, the transmission speed of the first transmission section is 10m / min to 20m / min, and the temperature of the first transmission section is 180℃ to 210℃. The foam raw material is coated a second time on the first layer, and then subjected to a second foaming treatment under the second foaming conditions to form a second layer on the first layer. The high-temperature release paper, the first layer, and the second layer constitute the material to be treated. The specific steps of performing secondary foaming treatment under the second foaming conditions are as follows: The high-temperature release paper after secondary coating is placed in the second transmission section of the production line. The length of the second transmission section is 15m to 20m, the transmission speed of the second transmission section is 10m / min to 20m / min, and the temperature of the second transmission section is 190℃ to 220℃. The material to be processed is cooled to obtain foam material, which is then rolled up for later use. The step of cooling the material to be treated includes: The material to be processed is placed in the third transmission section of the production line, and the third transmission section is equipped with a chiller loaded with cooling water and a cooling roller movably connected to the chiller. The temperature of the cooling water is lower than the first cooling temperature, which is -10°C, so that the surface temperature of the cooling roller is lower than the second cooling temperature, which is 1°C, and the material to be treated is cooled by the cooling roller.

2. The method for preparing foam material according to claim 1, characterized in that, The first preset time is 20 min to 25 min, and the second preset time is 3 h to 5 h.

3. The method for preparing foam material according to claim 1, characterized in that, The thickness of the first coating is 0.2mm~0.7mm, the thickness of the second coating is 0.1mm~0.4mm, the thickness of the first layer is 0.5mm~3.0mm, and the thickness of the second layer is 0.6mm~2.5mm.

4. A foam material, characterized in that, The foam material is prepared by the preparation method according to any one of claims 1 to 3.

5. A face mask, characterized in that, Includes a nose bridge strip and a nose pad layer made from the foam material of claim 4 using a predetermined production method.

6. The mask according to claim 5, characterized in that, The pre-defined production method includes the following steps: Unroll the prepared foam material and cut it into several first spare layers and several second spare layers according to the first preset size and the second preset size. An adhesive is coated onto the glassine release paper, and the glassine release paper is baked to allow the adhesive to dry and form a film. The first spare layer and the glassine release paper are bonded together by the adhesive to form a first model, and the first model is stamped to obtain a nose bridge strip. The second spare layer and the glassine release paper are bonded together by the adhesive to form a second model. Nose and mouth openings are made on the second model, and the second model after the nose and mouth openings are made is stamped to obtain the nose pad layer.

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