阅读说明：本技术 一种3d图案防渗漏高透气膜制备工艺 (Preparation process of anti-leakage high-breathability 3D pattern film ) 是由 李伟佳 周飞 罗广文 周展钱 邓崇振 于 2020-12-28 设计创作，主要内容包括：本发明公开了一种3D图案防渗漏高透气膜制备工艺,包括材料选择、材料共混、吸湿干燥、剪切混练、熔融挤出、激冷铸片、在线测厚、多级拉伸、3D冷却压纹、电晕表面粗化处理、收卷、产品分切。其中材料包括定变形性能的透气粒子、良好拉伸性能的透气粒子、强度高聚乙烯、聚酰亚胺树脂、环氧树脂、含有纳米级碳酸钙的高强度、耐穿刺透气粒子和抗静电粒子。通过设置3D压纹钢辊和特定的橡胶压辊,利用光线不同角度折射不同图案原理,制作特殊效果的3D压纹钢辊,验证开发特定的雕刻工艺,并配合图案要求制定适用的制造工艺,使产品成型后更能凸显3D效果,对消费者更具有吸引力。(The invention discloses a preparation process of a 3D pattern anti-leakage high-permeability film, which comprises the steps of material selection, material blending, moisture absorption drying, shearing and mixing, melt extrusion, chilling casting, on-line thickness measurement, multi-stage stretching, 3D cooling embossing, corona surface roughening treatment, rolling and product slitting. The material comprises air-permeable particles with fixed deformation performance, air-permeable particles with good tensile performance, high-strength polyethylene, polyimide resin, epoxy resin, high-strength, puncture-resistant air-permeable particles containing nano calcium carbonate and antistatic particles. Through setting up 3D impressed watermark steel roller and specific rubber compression roller, utilize the different pattern principles of the different angle refractions of light, make the 3D impressed watermark steel roller of special effect, verify and develop specific sculpture technology to cooperate the pattern to require to formulate suitable manufacturing process, make the product more can highlight the 3D effect after the shaping, more attract to the consumer.)

1. A preparation process of a 3D pattern anti-leakage high-breathability film is characterized by comprising the following steps: the preparation process comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 20-25% of air-permeable particles with definite deformation performance, 15-25% of air-permeable particles with good tensile performance, 20-30% of high-strength polyethylene, 30-40% of polyimide resin, 30-40% of epoxy resin, 5-10% of high strength of nano calcium carbonate, 10-15% of puncture-resistant air-permeable particles and 8-12% of antistatic particles;

s2: material blending: adding the selected materials into a vertical mixer, stirring and mixing to fully dissolve and mix the materials;

s3: moisture absorption and drying: placing the blended material in a vertical dryer for drying;

s4: shearing and kneading: after being fully dried by a vertical drier, the raw materials are conveyed to a screw to be fully sheared and mixed to form high-temperature fluid;

s5: melt extrusion: the fluid is gathered at the cavity inside the die head through a filter screen and a tubular connector of the extruder, and is metered and controlled through an adjustable automatic die head;

s6: chilling cast pieces: after being extruded, the fluid passes through a cast steel roller and a large rubber roller to be chilled and cast into a sheet;

s7: and (3) online thickness measurement: the cooling film body is measured in real time, so that the thickness of the extruded paste body is controlled, the thickness of a final product is ensured to be uniformly formed, and the use condition is met;

s8: multi-stage stretching: stretching and preheating the film body, and stretching the film body in multiple stages through a plurality of driving rollers;

s9: 3D cooling embossing: slightly cooling the film body after multistage stretching through each cooling steel roller group, then calendering by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, and pressing the patterns on the outer side of the film to enable the film to have stereoscopic impression and layering impression, thereby meeting the aesthetic requirements of market consumers;

s10: and (3) corona surface roughening treatment: corona discharge is carried out on the surface of the cooled film body by using high frequency and high voltage, so that the surface of the film body is roughened, the wettability of the film body to a polar solvent is increased, and the adhesion capacity of the surface of the film to ink is increased;

s11: winding: the breathable film which is intact according to the process can be rolled, so that after the breathable film which reaches the use standard can be used, the breathable film is rolled by utilizing closed-loop sectional type micro-tension control, and the rolling work of the breathable film is completed;

s12: cutting the product: the breathable film which is rolled is commercialized and cut for use, so that the breathable film can be reasonably and completely suitable for products.

2. The process for preparing a 3D pattern anti-leakage high-breathability film according to claim 1, wherein: when the mixed material of S5 is subjected to melt extrusion, fluid extrusion is ensured in a sealed and dustless environment, the temperature of the sealed environment is kept at 30-50 ℃, and the mixed material can be smoothly and uniformly laid.

3. The process for preparing a 3D pattern anti-leakage high-breathability film according to claim 1, wherein: and the steel roller and the press roller of the pressing pattern of the S9 are respectively a 3D embossing steel roller and a specific rubber press roller.

4. The process for preparing a 3D pattern anti-leakage high-breathability film according to claim 1, wherein: the on-line thickness measuring tool in S7 should be used for thickness measurement in a dust-free environment.

5. The process for preparing a 3D pattern anti-leakage high-breathability film according to claim 1, wherein: the corona surface roughening treatment in S10 needs to be performed in a dust-free environment.

6. The process for preparing a 3D pattern anti-leakage high-breathability film according to claim 1, wherein: and in the step of slitting the S12 product, the surface of the high-permeability film is always vertical to the cutter.

7. The process for preparing a 3D pattern anti-leakage high-breathability film according to claim 1, wherein: the rotating speed of the vertical mixer in the S2 is 300-350 r/min.

8. The process for preparing a 3D pattern anti-leakage high-breathability film according to claim 1, wherein: the winding speed of the high-permeability film in the S11 product winding step is 100-150m/min, so that the wrinkles of the permeability film are reduced.

Technical Field

The invention belongs to the technical field of manufacturing of breathable films, and particularly relates to a preparation process of a 3D pattern anti-leakage high-breathability film.

Background

In the textile fabric industry, the breathable film is a waterproof moisture-permeable film, and the high-molecular elastomer TPU is used as a main material, so that the breathable film is good in elasticity and high in strength. Although the thickness is extremely thin in waterproof property, the physical performance of other materials is incomparable, the hydrophilic group is introduced into the material by utilizing the high-tech technology to ensure that the film has high waterproof property and excellent moisture permeability, the breakthrough in the function is matched with the laminating processing technology of the textile industry, the added value of the textile is greatly improved, the material is widely applied to snow coats, wind coats, cold-proof jackets, gloves, caps, shoes and the like, and the novel and efficient covering material is formed by hot-pressing polypropylene fibers and has the characteristics of heat preservation, ventilation, moisture condensation prevention, corrosion resistance, durability and the like.

The breathable film for the sanitary towel in the market at present is generally used by adopting a common steel roller and a compression roller for calendering, so that the calendered pattern on the breathable film is not obvious enough, the pattern lacks certain vividness when being pressed out, the light refracted by the light is not saturated enough, the pattern lacks three-dimensional feeling, then commodities sold in the market mainly adopt a plain film and a dotting film, the breathable film for the sanitary towel lacks certain stereoscopic impression and layered impression when being observed in certain vision, consumers lack certain attraction when buying, the aesthetic requirement of current consumers cannot be met, the breathable performance of the film is improved, the water pressure resistance of the film is ignored only by considering the seepage and leakage prevention of the film, and the obvious change of the water pressure resistance is realized, and the breathable film is used on the sanitary towel, the transparent film has extremely poor use experience for consumers, and the detection standard of the transparent film is carried out for the purpose of determining that the transparent film has better heat-resistant and stretch-resistant effects.

Disclosure of Invention

The invention aims to provide a preparation process of a 3D pattern anti-leakage high-permeability film, and aims to solve the problems that in the use process of the existing anti-leakage high-permeability film in the background art, due to the fact that most of the existing anti-leakage high-permeability film is calendered by a common steel roll and a common pressure roll, patterns calendered on the air-permeable film are not obvious enough, the patterns lack certain vivid feeling when being pressed out, and therefore light refracted by the light is not saturated enough, and the patterns lack three-dimensional feeling.

In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a 3D pattern anti-leakage high-permeability film comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 20-25% of air-permeable particles with definite deformation performance, 15-25% of air-permeable particles with good tensile performance, 20-30% of high-strength polyethylene, 30-40% of polyimide resin, 30-40% of epoxy resin, 5-10% of high strength of nano calcium carbonate, 10-15% of puncture-resistant air-permeable particles and 8-12% of antistatic particles.

S2: material blending: and adding the selected materials into a vertical mixer, stirring and mixing to ensure that the materials are fully dissolved and mixed.

S3: moisture absorption and drying: the blended material was placed inside a vertical dryer for drying.

S4: shearing and kneading: the raw material is sufficiently dried by a vertical dryer, and then conveyed to a screw to be sufficiently sheared and kneaded to form a high-temperature fluid.

S5: melt extrusion: the fluid is gathered at the inner cavity of the die head through a filter screen and a tubular connector of the extruder, and is metered and controlled through the adjustable automatic die head.

S6: chilling cast pieces: after being extruded, the fluid passes through a casting steel roller and a large rubber roller to be chilled and cast into a sheet.

S7: and (3) online thickness measurement: and measuring the cooling film body in real time, so that the thickness of the extruded paste body is controlled, the thickness of the final product is uniformly formed, and the conditions are met.

S8: multi-stage stretching: the film body is stretched and preheated, and the film body is stretched in multiple stages through a plurality of driving rollers.

S9: 3D cooling embossing: the film body after multistage stretching is slightly cooled through each cooling steel roller group, then is calendered by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, and the patterns are pressed on the outer side of the film, so that the film has stereoscopic impression and layered impression, and the aesthetic requirements of market consumers are met.

S10: and (3) corona surface roughening treatment: and performing corona discharge on the surface of the cooled film body by using high frequency and high voltage to roughen the surface of the film body, increase the wettability of the film body to a polar solvent and increase the adhesion capacity of the surface of the film to ink.

S11: winding: according to the perfect ventilated membrane of above flow can carry out the rolling, ensure to reach the ventilated membrane of service standard and can use the back, utilize closed loop sectional type micro tension control to carry out the rolling, accomplish the collection work of ventilated membrane.

S12: cutting the product: the breathable film which is rolled is commercialized and cut for use, so that the breathable film can be reasonably and completely suitable for products.

Preferably, when the mixed material of S5 is melt extruded, fluid extrusion is ensured in a sealed and dust-free environment, and the temperature of the sealed environment is maintained at 30-50 ℃, so that the mixed material can be smoothly and uniformly laid.

Preferably, the steel roller and the press roller of the pressing pattern of S9 are a 3D embossed steel roller and a specific rubber press roller, respectively.

Preferably, the on-line thickness measuring tool in S7 should perform thickness measurement in a dust-free environment.

Preferably, the corona surface roughening treatment in S10 is performed in a dust-free environment.

Preferably, the surface of the high-permeability film in the step of slitting the S12 product is always vertical to the cutter.

Preferably, the rotating speed of the vertical mixer in S2 is 300-350 r/min.

Preferably, the winding speed of the high-permeability film in the winding step of the S11 product is 100-150m/min, so that the wrinkles of the permeability film are reduced.

Compared with the prior art, the invention has the beneficial effects that:

1. through setting up 3D impressed watermark steel roll and specific rubber compression roller, utilize the different pattern principles of the different angle refractions of light, make special effect's 3D impressed watermark steel roll, develop high line number high fineness pattern impressed watermark roll, verify and develop specific sculpture technology, and cooperate the pattern requirement to formulate suitable manufacturing process, make the 3D effect that more can show after the product shaping, carry out the calendering through 3D impressed watermark steel roll and the rubber compression roller that has specific hardness coefficient, be formed with the ventilative film of dark decorative pattern of the protruding sense pattern of 3D, so both can show the pattern of pressing more three-dimensional, can make the consumer more attract through the pattern again.

2. By arranging puncture-resistant breathable particles, polyimide resin and epoxy resin, and matching with different compression deformation characteristics of a silica gel layer according to effect requirements, a liquid silica gel forming process suitable for pattern embossing is developed; on the other hand, the surface is subjected to fineness treatment by using high-mesh carborundum, so that the roll surface is smooth and fine, the embossed patterns are clear, the embossing process is optimized, and the film has 3D (three-dimensional) convex patterns, so that the breathable film can have good adhesion, and the patterns are enabled to be more clear.

3. The breathable master batch with excellent strength performance and high puncture resistance is selected by arranging breathable particles, high-strength polyethylene and antistatic particles; aiming at the influence of the 3D embossing on the physical properties of the film after the film is formed, a material for improving the air permeability is selected, so that the material meets the requirements of good air permeability and water resistance. The strength-modified breathable master batch is used, so that the stiffness is enhanced and the 3D effect is enhanced; on the other hand, in order to solve the problem that the use effect of the film is influenced by static electricity generated by friction in the production process, the antistatic functional auxiliary material is added and used, so that the surface performance of the material is improved, and the static electricity generated in a high-speed production line is greatly reduced, so that on one hand, the breathable film has higher waterproof and breathable performance, and on the other hand, the generation of static electricity can be reduced in the production process.

Drawings

FIG. 1 is a schematic view of the process flow structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The first embodiment is as follows:

the invention provides a technical scheme that: a preparation process of a 3D pattern anti-leakage high-breathability film comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 20% of air-permeable particles with fixed deformation performance, 15% of air-permeable particles with good tensile performance, 20% of high-strength polyethylene, 30% of polyimide resin, 30% of epoxy resin, 5% of high strength nano-grade calcium carbonate, 10% of puncture-resistant air-permeable particles and 8% of antistatic particles.

S2: material blending: and adding the selected materials into a vertical mixer, stirring and mixing, wherein the rotating speed of the vertical mixer is 310r/min, so that the materials are fully dissolved and mixed.

S3: moisture absorption and drying: the blended material was placed inside a vertical dryer for drying.

S4: shearing and kneading: the raw material is sufficiently dried by a vertical dryer, and then conveyed to a screw to be sufficiently sheared and kneaded to form a high-temperature fluid.

S5: melt extrusion: the fluid is gathered at the cavity inside the die head through a filter screen and a tubular connector of the extruder, the metering control is carried out through the adjustable automatic die head, when the mixed material is melted and extruded, the fluid type extrusion in a sealed and dustless environment is ensured, the temperature of the sealed environment is kept at 31 ℃, and the mixed material can be smoothly and uniformly laid.

S6: chilling cast pieces: after being extruded, the fluid passes through a casting steel roller and a large rubber roller to be chilled and cast into a sheet.

S7: and (3) online thickness measurement: and (3) measuring the cooling film body in real time to control the thickness of the extruded paste, and measuring the thickness of the paste in a dust-free environment by using an on-line thickness measuring tool to ensure that the final product is uniformly formed in thickness and meet the conditions.

S8: multi-stage stretching: the film body is stretched and preheated, and the film body is stretched in multiple stages through a plurality of driving rollers.

S9: 3D cooling embossing: the film body after multistage stretching is slightly cooled through each cooling steel roller group, then is calendered by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, the steel roller and the compression roller which press the patterns are respectively a 3D embossing steel roller and a specific rubber compression roller, and the patterns are pressed on the outer side of the film, so that the film has stereoscopic impression and layering impression, and the aesthetic requirements of market consumers are met.

S10: and (3) corona surface roughening treatment: the cooled surface of the film body is subjected to corona discharge by high frequency and high voltage, so that the surface of the film body is roughened, the wettability of the film body to a polar solvent is increased, the adhesion capability of the surface of the film to ink is increased, and the corona surface roughening treatment is not required to be carried out in a dust-free environment.

S11: winding: the breathable film which is intact according to the above process can be rolled, the rolling speed of the high breathable film is 110m/min after the breathable film which reaches the use standard can be used, so that the wrinkles of the breathable film are reduced, the rolling is carried out by utilizing closed-loop sectional type micro-tension control, and the collecting work of the breathable film is completed.

S12: cutting the product: the breathable film which is finished by rolling is commercialized and cut to be used, and the surface of the breathable film and the cutting knife in the product cutting step are always in a vertical state, so that the breathable film can be reasonably and completely suitable for products.

Example two:

the invention provides a technical scheme that: a preparation process of a 3D pattern anti-leakage high-breathability film comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 21% of air-permeable particles with fixed deformation performance, 20% of air-permeable particles with good tensile performance, 20% of high-strength polyethylene, 35% of polyimide resin, 35% of epoxy resin, 6% of high strength nano-grade calcium carbonate, 13% of puncture-resistant air-permeable particles and 10% of antistatic particles.

S2: material blending: and adding the selected materials into a vertical mixer, stirring and mixing, wherein the rotating speed of the vertical mixer is 315r/min, so that the materials are fully dissolved and mixed.

S3: moisture absorption and drying: the blended material was placed inside a vertical dryer for drying.

S4: shearing and kneading: the raw material is sufficiently dried by a vertical dryer, and then conveyed to a screw to be sufficiently sheared and kneaded to form a high-temperature fluid.

S5: melt extrusion: the fluid is gathered in die head internal cavity department through the filter screen cloth of extruder and tubular connector to through adjustable automatic die head measurement control, when carrying out the melt extrusion to the material that accomplishes mixing, ensure fluid formula extrusion in sealed and dustless environment, and the temperature of sealed environment keeps 35 degrees centigrade, ensure that the material of mixing can level evenly lay.

S6: chilling cast pieces: after being extruded, the fluid passes through a casting steel roller and a large rubber roller to be chilled and cast into a sheet.

S7: and (3) online thickness measurement: and (3) measuring the cooling film body in real time to control the thickness of the extruded paste, and measuring the thickness of the paste in a dust-free environment by using an on-line thickness measuring tool to ensure that the final product is uniformly formed in thickness and meet the conditions.

S8: multi-stage stretching: the film body is stretched and preheated, and the film body is stretched in multiple stages through a plurality of driving rollers.

S9: 3D cooling embossing: the film body after multistage stretching is slightly cooled through each cooling steel roller group, then is calendered by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, the steel roller and the compression roller which press the patterns are respectively a 3D embossing steel roller and a specific rubber compression roller, and the patterns are pressed on the outer side of the film, so that the film has stereoscopic impression and layering impression, and the aesthetic requirements of market consumers are met.

S10: and (3) corona surface roughening treatment: the cooled surface of the film body is subjected to corona discharge by high frequency and high voltage, so that the surface of the film body is roughened, the wettability of the film body to a polar solvent is increased, the adhesion capability of the surface of the film to ink is increased, and the corona surface roughening treatment is not required to be carried out in a dust-free environment.

S11: winding: according to the perfect ventilated membrane of above flow can carry out the rolling, ensure to reach the use standard the ventilated membrane can use the back, be 120m/min to the rolling speed of high ventilated membrane to reduce the ventilated membrane fold, utilize closed loop sectional type micro tension control to carry out the rolling, accomplish the work of collecting of ventilated membrane.

S12: cutting the product: the breathable film which is finished by rolling is commercialized and cut to be used, and the surface of the breathable film and the cutting knife in the product cutting step are always in a vertical state, so that the breathable film can be reasonably and completely suitable for products.

Example three:

the invention provides a technical scheme that: a preparation process of a 3D pattern anti-leakage high-breathability film comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 23% of air-permeable particles with fixed deformation performance, 20% of air-permeable particles with good tensile performance, 37% of high-strength polyethylene, 37% of polyimide resin, 32% of epoxy resin, 8% of high strength nano-grade calcium carbonate, 13% of puncture-resistant air-permeable particles and 10% of antistatic particles.

S2: material blending: and adding the selected materials into a vertical mixer, stirring and mixing, wherein the rotating speed of the vertical mixer is 320r/min, so that the materials are fully dissolved and mixed.

S3: moisture absorption and drying: the blended material was placed inside a vertical dryer for drying.

S4: shearing and kneading: the raw material is sufficiently dried by a vertical dryer, and then conveyed to a screw to be sufficiently sheared and kneaded to form a high-temperature fluid.

S5: melt extrusion: the fluid is gathered at the cavity inside the die head through a filter screen and a tubular connector of the extruder, and is subjected to metering control through the adjustable automatic die head, so that when the mixed material is melted and extruded, the fluid type extrusion in a sealed and dustless environment is ensured, the temperature of the sealed environment is kept at 36 ℃, and the mixed material can be smoothly and uniformly laid.

S6: chilling cast pieces: after being extruded, the fluid passes through a casting steel roller and a large rubber roller to be chilled and cast into a sheet.

S7: and (3) online thickness measurement: and (3) measuring the cooling film body in real time to control the thickness of the extruded paste, and measuring the thickness by using a measuring tool for linear thickness measurement in a dust-free environment to ensure that the final product is uniformly formed in thickness and meet the requirement.

S8: multi-stage stretching: the film body is stretched and preheated, and the film body is stretched in multiple stages through a plurality of driving rollers.

S9: 3D cooling embossing: the film body after multistage stretching is slightly cooled through each cooling steel roller group, then is calendered by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, the steel roller and the compression roller which press the patterns are respectively a 3D embossing steel roller and a specific rubber compression roller, and the patterns are pressed on the outer side of the film, so that the film has stereoscopic impression and layering impression, and the aesthetic requirements of market consumers are met.

S10: and (3) corona surface roughening treatment: the cooled surface of the film body is subjected to corona discharge by high frequency and high voltage, so that the surface of the film body is roughened, the wettability of the film body to a polar solvent is increased, the adhesion capability of the surface of the film to ink is increased, and the corona surface roughening treatment is not required to be carried out in a dust-free environment.

S11: winding: according to the perfect ventilated membrane of above flow can carry out the rolling, ensure to reach the use standard the ventilated membrane can use the back, be 130m/min to the rolling speed of high ventilated membrane to reduce the ventilated membrane fold, utilize closed loop sectional type micro tension control to carry out the rolling, accomplish the work of collecting of ventilated membrane.

S12: cutting the product: the breathable film which is finished by rolling is commercialized and cut to be used, and the surface of the breathable film and the cutting knife in the product cutting step are always in a vertical state, so that the breathable film can be reasonably and completely suitable for products.

Example four:

the invention provides a technical scheme that: a preparation process of a 3D pattern anti-leakage high-breathability film comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 23% of air-permeable particles with fixed deformation performance, 22% of air-permeable particles with good tensile performance, 28% of high-strength polyethylene, 38% of polyimide resin, 34% of epoxy resin, 7% of high strength nano-grade calcium carbonate, 13% of puncture-resistant air-permeable particles and 10% of antistatic particles.

S2: material blending: and adding the selected materials into a vertical mixer, stirring and mixing, wherein the rotating speed of the vertical mixer is 330r/min, so that the materials are fully dissolved and mixed.

S3: moisture absorption and drying: the blended material was placed inside a vertical dryer for drying.

S4: shearing and kneading: the raw material is sufficiently dried by a vertical dryer, and then conveyed to a screw to be sufficiently sheared and kneaded to form a high-temperature fluid.

S5: melt extrusion: the fluid is gathered at the cavity inside the die head through a filter screen and a tubular connector of the extruder, and is subjected to metering control through the adjustable automatic die head, so that when the mixed material is melted and extruded, the fluid type extrusion in a sealed and dustless environment is ensured, the temperature of the sealed environment is kept at 40 ℃, and the mixed material can be smoothly and uniformly laid.

S6: chilling cast pieces: after being extruded, the fluid passes through a casting steel roller and a large rubber roller to be chilled and cast into a sheet.

S7: and (3) online thickness measurement: and (3) measuring the cooling film body in real time to control the thickness of the extruded paste, and measuring the thickness of the paste in a dust-free environment by using an on-line thickness measuring tool to ensure that the final product is uniformly formed in thickness and meet the conditions.

S8: multi-stage stretching: the film body is stretched and preheated, and the film body is stretched in multiple stages through a plurality of driving rollers.

S9: 3D cooling embossing: the film body after multistage stretching is slightly cooled through each cooling steel roller group, then is calendered by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, the steel roller and the compression roller which press the patterns are respectively a 3D embossing steel roller and a specific rubber compression roller, and the patterns are pressed on the outer side of the film, so that the film has stereoscopic impression and layering impression, and the aesthetic requirements of market consumers are met.

S10: and (3) corona surface roughening treatment: the cooled surface of the film body is subjected to corona discharge by high frequency and high voltage, so that the surface of the film body is roughened, the wettability of the film body to a polar solvent is increased, the adhesion capability of the surface of the film to ink is increased, and the corona surface roughening treatment is not required to be carried out in a dust-free environment.

S11: winding: according to the perfect ventilated membrane of above flow can carry out the rolling, ensure to reach the use standard the ventilated membrane can use the back, be 140m/min to the rolling speed of high ventilated membrane to reduce the ventilated membrane fold, utilize closed loop sectional type micro tension control to carry out the rolling, accomplish the work of collecting of ventilated membrane.

S12: cutting the product: the breathable film which is finished by rolling is commercialized and cut to be used, and the surface of the breathable film and the cutting knife in the product cutting step are always in a vertical state, so that the breathable film can be reasonably and completely suitable for products.

Example five:

the invention provides a technical scheme that: a preparation process of a 3D pattern anti-leakage high-breathability film comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 20% of air-permeable particles with fixed deformation performance, 22% of air-permeable particles with good tensile performance, 27% of high-strength polyethylene, 34% of polyimide resin, 31% of epoxy resin, 5% of high strength nano-grade calcium carbonate, 10% of puncture-resistant air-permeable particles and 9% of antistatic particles.

S2: material blending: and adding the selected materials into a vertical mixer, stirring and mixing, wherein the rotating speed of the vertical mixer is 330r/min, so that the materials are fully dissolved and mixed.

S3: moisture absorption and drying: the blended material was placed inside a vertical dryer for drying.

S4: shearing and kneading: the raw material is sufficiently dried by a vertical dryer, and then conveyed to a screw to be sufficiently sheared and kneaded to form a high-temperature fluid.

S5: melt extrusion: the fluid is gathered at the cavity inside the die head through a filter screen and a tubular connector of the extruder, and is subjected to metering control through the adjustable automatic die head, so that when the mixed material is melted and extruded, the fluid type extrusion in a sealed and dustless environment is ensured, the temperature of the sealed environment is kept at 38 ℃, and the mixed material can be smoothly and uniformly laid.

S6: chilling cast pieces: after being extruded, the fluid passes through a casting steel roller and a large rubber roller to be chilled and cast into a sheet.

S7: and (3) online thickness measurement: and (3) measuring the cooling film body in real time to control the thickness of the extruded paste, and measuring the thickness of the paste in a dust-free environment by using an on-line thickness measuring tool to ensure that the final product is uniformly formed in thickness and meet the conditions.

S8: multi-stage stretching: the film body is stretched and preheated, and the film body is stretched in multiple stages through a plurality of driving rollers.

S9: 3D cooling embossing: the film body after multistage stretching is slightly cooled through each cooling steel roller group, then is calendered by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, the steel roller and the compression roller which press the patterns are respectively a 3D embossing steel roller and a specific rubber compression roller, and the patterns are pressed on the outer side of the film, so that the film has stereoscopic impression and layering impression, and the aesthetic requirements of market consumers are met.

S10: and (3) corona surface roughening treatment: the cooled surface of the film body is subjected to corona discharge by high frequency and high voltage, so that the surface of the film body is roughened, the wettability of the film body to a polar solvent is increased, the adhesion capability of the surface of the film to ink is increased, and the corona surface roughening treatment is not required to be carried out in a dust-free environment.

S11: winding: according to the perfect ventilated membrane of above flow can carry out the rolling, ensure to reach the use standard the ventilated membrane can use the back, be 120m/min to the rolling speed of high ventilated membrane to reduce the ventilated membrane fold, utilize closed loop sectional type micro tension control to carry out the rolling, accomplish the work of collecting of ventilated membrane.

S12: cutting the product: the breathable film which is finished by rolling is commercialized and cut to be used, and the surface of the breathable film and the cutting knife in the product cutting step are always in a vertical state, so that the breathable film can be reasonably and completely suitable for products.

Example six:

the invention provides a technical scheme that: a preparation process of a 3D pattern anti-leakage high-breathability film comprises the following steps:

s1: selecting materials: weighing the following raw material components in parts by weight: 23% of air-permeable particles with fixed deformation performance, 20% of air-permeable particles with good tensile performance, 26% of high-strength polyethylene, 33% of polyimide resin, 38% of epoxy resin, 6% of high strength nano-grade calcium carbonate, 11% of puncture-resistant air-permeable particles and 10% of antistatic particles.

S2: material blending: and adding the selected materials into a vertical mixer, stirring and mixing, wherein the rotating speed of the vertical mixer is 345r/min, so that the materials are fully dissolved and mixed.

S3: moisture absorption and drying: the blended material was placed inside a vertical dryer for drying.

S4: shearing and kneading: the raw material is sufficiently dried by a vertical dryer, and then conveyed to a screw to be sufficiently sheared and kneaded to form a high-temperature fluid.

S5: melt extrusion: the fluid is gathered at the cavity inside the die head through a filter screen and a tubular connector of the extruder, and is subjected to metering control through the adjustable automatic die head, so that when the mixed material is melted and extruded, the fluid type extrusion in a sealed and dustless environment is ensured, the temperature of the sealed environment is kept at 45 ℃, and the mixed material can be smoothly and uniformly laid.

S6: chilling cast pieces: after being extruded, the fluid passes through a casting steel roller and a large rubber roller to be chilled and cast into a sheet.

S7: and (3) online thickness measurement: and (3) measuring the cooling film body in real time to control the thickness of the extruded paste, and measuring the thickness of the paste in a dust-free environment by using an on-line thickness measuring tool to ensure that the final product is uniformly formed in thickness and meet the conditions.

S8: multi-stage stretching: the film body is stretched and preheated, and the film body is stretched in multiple stages through a plurality of driving rollers.

S9: 3D cooling embossing: the film body after multistage stretching is slightly cooled through each cooling steel roller group, then is calendered by using a 3D embossing steel roller and a rubber compression roller to form a deep pattern breathable film with 3D convex patterns, the steel roller and the compression roller which press the patterns are respectively a 3D embossing steel roller and a specific rubber compression roller, and the patterns are pressed on the outer side of the film, so that the film has stereoscopic impression and layering impression, and the aesthetic requirements of market consumers are met.

S10: and (3) corona surface roughening treatment: the cooled surface of the film body is subjected to corona discharge by high frequency and high voltage, so that the surface of the film body is roughened, the wettability of the film body to a polar solvent is increased, the adhesion capability of the surface of the film to ink is increased, and the corona surface roughening treatment is not required to be carried out in a dust-free environment.

S11: winding: the breathable film which is intact according to the above process can be rolled, the rolling speed of the high breathable film is 110m/min after the breathable film which reaches the use standard can be used, so that the wrinkles of the breathable film are reduced, the rolling is carried out by utilizing closed-loop sectional type micro-tension control, and the collecting work of the breathable film is completed.

S12: cutting the product: the breathable film which is finished by rolling is commercialized and cut to be used, and the surface of the breathable film and the cutting knife in the product cutting step are always in a vertical state, so that the breathable film can be reasonably and completely suitable for products.

The performance of the transparent films of examples 1-6 above were tested, and the results are shown in the following table:

therefore, the transparent film has better heat resistance and stretching resistance.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.