CN111531987A - Breathable composite film for protective isolation clothes and preparation process thereof - Google Patents
Breathable composite film for protective isolation clothes and preparation process thereof Download PDFInfo
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- CN111531987A CN111531987A CN202010311903.7A CN202010311903A CN111531987A CN 111531987 A CN111531987 A CN 111531987A CN 202010311903 A CN202010311903 A CN 202010311903A CN 111531987 A CN111531987 A CN 111531987A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/02—Layered materials
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
- A41D31/102—Waterproof and breathable
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- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
- A41D31/00—Materials specially adapted for outerwear
- A41D31/04—Materials specially adapted for outerwear characterised by special function or use
- A41D31/14—Air permeable, i.e. capable of being penetrated by gases
- A41D31/145—Air permeable, i.e. capable of being penetrated by gases using layered materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
- B32B37/1207—Heat-activated adhesive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0004—Cutting, tearing or severing, e.g. bursting; Cutter details
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0253—Polyolefin fibres
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/724—Permeability to gases, adsorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/726—Permeability to liquids, absorption
- B32B2307/7265—Non-permeable
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
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- Plasma & Fusion (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
Abstract
The invention discloses a breathable composite film for protective isolation clothes and a preparation process thereof, relates to the technical field of preparation of breathable composite films, and comprises the following stepsThe surface layer is PP anti-sticking super-soft non-woven fabric, the core layer is a PE breathable film, and the core layer and the surface layer are compounded by hot melt adhesive; wherein, the core layer is 20-30g/m2Surface layer 38g/m22g/m of hot melt adhesive2. The invention relates to a breathable composite film made of micro-nano-grade materials, wherein a non-woven fabric is soft and durable, the breathable film is breathable and waterproof, and the non-woven fabric and the breathable film are compounded through hot melt adhesive, so that the breathable composite film is thin in thickness, light in weight, strong in breathability, high in structural strength and suitable for protective isolation clothes.
Description
Technical Field
The invention relates to the technical field of preparation of breathable composite films, in particular to a breathable composite film for protective isolation clothes and a preparation process thereof.
Background
When the human society encounters a serious epidemic accident, the demand of the protective isolation suit suddenly increases, the protective isolation suit is taken as a disposable consumable, and the consumption of the protective isolation suit exponentially increases according to the severity of the epidemic, so that the demand of the protective isolation suit is very large. As a raw material of disposable medical protective clothing, the medical protective clothing composite film needs to meet the requirements of three-rejection one-resistance, namely water repellency, blood repellency, alcohol repellency and static resistance, and simultaneously can allow air and water vapor to permeate, and has the effects of air permeability and water impermeability, thereby meeting the medical requirements. Composite membranes are currently used in a wide variety of applications in the health, medical, construction, automotive and sports industries.
The production of breathable composite films is mainly carried out in three ways. 1. Casting and compounding; mainly depends on the self viscosity compounding of the plastic particles after hot melting. 2. Compounding hot melt adhesive; and spraying glue on the surface of the film for compounding. 3. And (4) hot-pressing compounding, namely compounding by means of external high temperature and pressure.
In the prior art, hot melt adhesive compounding is still the mainstream trend, but in the actual production process, the ventilative volume of hot melt adhesive compound product is lower, and its reason is that the fashioned micropore of ventilated membrane is not of uniform size, and in hot melt adhesive compounding process, less micropore is extremely easily blocked up by the hot melt adhesive, leads to ventilative efficiency to descend, influences the quality of ventilative complex film.
Disclosure of Invention
The invention aims to provide a breathable composite film for protective barrier clothing.
The invention is realized by the following technical scheme: a breathable composite film for protective isolation clothes comprises a core layer and a surface layer, wherein the surface layer is PP (polypropylene) anti-sticking super-soft non-woven fabric, the core layer is a PE (polyethylene) breathable film, and the core layer and the surface layer are compounded by hot melt adhesive; wherein, the core layer is 20-30g/m2Surface layer 38g/m22g/m of hot melt adhesive2。
By adopting the technical scheme, the invention is the breathable composite film made of the micro-nano-grade material, wherein the non-woven fabric is soft and durable, the breathable film is breathable and impermeable, the non-woven fabric and the breathable film are compounded through the hot melt adhesive, the thickness is thin, the weight is light, the breathability is strong, the structural strength is high, and the breathable composite film is suitable for being used in protective isolation clothes.
The invention also aims to provide a preparation process of the breathable composite film for the protective barrier suit.
A preparation process of a breathable composite film for protective isolation clothes comprises the following steps: the method comprises the following steps: after drying the air-permeable colloidal particles, sending the air-permeable colloidal particles into an extruder, wherein the temperature of the extruder is 245-; step two: the sheet layer is sent into a preheating roller, the preheating temperature is 60 ℃, the preheated sheet layer is longitudinally stretched and formed into a core layer by 1.8-2.5 times through a stretching roller set, and the core layer passes through a shaping roller set; step three: the core layer is sent into a cooling roller, the cooling temperature is 30 ℃, and corona treatment is carried out; step four: and (4) enabling the core layer and the surface layer to enter a compounding machine, uniformly compounding by adopting hot melt adhesive, and rolling a finished product.
Through adopting above-mentioned technical scheme, the casting shaping in the extruder behind ventilative micelle drying process, through the shaping roller set design of cooling down, it is even to finalize the design fast in the lamella back can ensure each point thickness in the lamella to tension is stable between the inside individual molecular chain of lamella, prepares for follow-up trompil. After the lamella preheats, the molecular chains in the core layer are orderly arranged to form the core layer with micropores, the formed core layer enters the sizing roller set again to be sized, the core layer structure is stable, and the sizes of the micropores tend to be the same and are not easy to deform. And finally, compounding the core layer with the surface layer hot melt adhesive to form the breathable composite film.
Further setting the following steps: and (3) primarily screening the breathable colloidal particles, and then sending the particles into a dryer, wherein the temperature of the dryer is controlled to be 70-90 ℃, and the time is 3-5 min.
Through adopting above-mentioned technical scheme, drying-machine stoving temperature and stoving time are regulated and control according to ventilative micelle outward appearance humidity and air humidity, ensure to get into the ventilative micelle outward appearance drying of extruder.
Further setting the following steps: in the second step, the drawing roller group sequentially passes through two drawing main rollers, two back pressure rollers and two drawing auxiliary rollers.
Through adopting above-mentioned technical scheme, tensile home roll and tensile roller of assisting play the effect of saying to the lamella, and the back pressure roller plays firm and repressing effect to the lamella, ensures that the thickness at each point of lamella is even.
Further setting the following steps: in the second step, the tension of the sheet layer is controlled to be 5KN in the stretching process.
By adopting the technical scheme, the sheet layer plays a role in tension control according to the change of the sheet layer in longitudinal stretching, and the stability of the hole drawing is ensured.
Further setting the following steps: in the third step, the porosity of the core layer is 20-25%, and the average pore diameter of the core layer is 40-50 nm.
Further setting the following steps: the preheating roller is a rubber roller, the stretching main roller is a steel roller, the back pressure roller is a steel roller, the stretching auxiliary roller is a rubber roller, the setting roller is a rubber roller, and the cooling roller is a rubber roller.
Further setting the following steps: in the fourth step, a glue mixing compounding method in a compounding mode adopts the compounding of PUR hot melt glue and EVA hot melt glue, and the proportion of the PUR hot melt glue and the EVA hot melt glue is 3: 1.
Through adopting above-mentioned technical scheme, thoughtlessly glue in the primary curing process, its cohesion can increase, and curing strength improves gradually, and in the deep curing process, its bonding with sandwich layer and surface course only, inside formation crosslinked structure, curing strength is higher, reduces simultaneously to the micropore cover, thoughtlessly glue water resistance, chemical resistance, solvent resistance all with difficult height, self also green.
Further setting the following steps: in the third step, the power of the corona machine is 3.5kw, and the corona machine is provided with an air processor to discharge harmful gases generated in the corona process.
By adopting the technical scheme, the surface of the core layer has higher adhesiveness by adopting corona treatment, and the glue hanging in the fourth step is facilitated.
Further setting the following steps: and (3) after the corona treatment is carried out on the core layer, cutting edges on two sides of the core layer, mixing the recycled waste material with the dried breathable colloidal particles in the step one, and feeding the mixture into the extruder again.
Through adopting above-mentioned technical scheme, recycle the waste material that the side cut got to processing in the extruder is carried out once more, recycle.
In conclusion, the beneficial technical effects of the invention are as follows:
(1) the breathable composite film suitable for the isolation suit is prepared by compounding the soft and durable non-woven fabric and the breathable and waterproof characteristics of the breathable film through hot melt adhesive, and has the advantages of thin thickness, light weight, strong breathability and high structural strength;
(2) in the production process, the size of the micropores is ensured by controlling the forming thickness and the forming quality of the breathable composite film, the non-coverage of the hot melt adhesive is noticed in the compounding process to ensure the breathability of the breathable composite film, the use requirements of the medical protective isolation clothes are finally met, and the breathable composite film has great market value and social value.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
Reference numerals: 1. a core layer; 2. a surface layer; 3. and (5) hot melt adhesive.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
Example 1
Referring to fig. 1, the breathable composite film for the protective and isolation suit disclosed by the invention comprises a core layer 1 and a surface layer 2, wherein the surface layer 2 is a PP (polypropylene) anti-sticking super-soft non-woven fabric, the core layer 1 is a PE (polyethylene) breathable film, and the core layer 1 and the surface layer 2 are compounded by adopting a hot melt adhesive 3; wherein, the core layer is 1-30g/m2Top layer 2g/m23g/m of hot melt adhesive2. The non-woven fabrics are soft and durable, the breathable film is breathable and impermeable, the non-woven fabrics and the breathable film are compounded through hot melt 3 glue, the thickness is thin, the weight is light, the breathability is strong, the structural strength is high, and the protective isolation clothes are suitable for being used.
Example 2
A preparation process of a breathable composite film for protective isolation clothes comprises the following steps:
the method comprises the following steps: and (3) after drying treatment, sending the air-permeable colloidal particles into an extruder, carrying out tape casting on the air-permeable colloidal particles to form a uniform lamellar layer with the thickness of 4 filaments, and enabling the lamellar layer to pass through a forming roller set.
Wherein, the breathable colloidal particles can adopt products of the Yongzhou Geya materials science and technology Limited company with the brand number of EC5011-04, and are sent into a dryer for drying, the temperature of the dryer is controlled at 85 ℃, and the drying time is 5 minutes; the extruder is a single-layer mouth film, the rotating speed of a screw is 30 r/min, and the temperature of the extruder is 250 ℃; the forming roller group comprises a plurality of forming rollers, and the forming rollers are rubber rollers.
After the air-permeable colloidal particles are dried, the air-permeable colloidal particles enter an extruder for casting and film forming, then the forming roller set is used for cooling and shaping the lamella, the temperature of the lamella is gradually reduced to the room temperature from the extrusion temperature, and the forming roller set plays a role in stable cooling and shaping, so that the uniform thickness of each point in the lamella is ensured, and the tension between each molecular chain in the lamella is stable, thereby preparing for subsequent hole drawing.
Step two: and (3) feeding the sheet layer into a preheating roller, wherein the preheating temperature is 60 ℃, longitudinally stretching the preheated sheet layer by 1.8 times through a stretching roller set to form a core layer 1, and enabling the core layer 1 to pass through a shaping roller set.
The preheating roller is a rubber roller, the stretching roller group sequentially comprises two stretching main rollers, two back pressure rollers and two stretching auxiliary rollers, the stretching main rollers are steel rollers, the back pressure rollers are steel rollers, the stretching auxiliary rollers are rubber rollers, the setting rollers are rubber rollers, and the tension of the lamella in the stretching process is controlled to be 5 KN.
The lamella is preheated, the activity of the molecular chain in the lamella is improved, the tension of the lamella is effectively controlled, and the stability of the broaching hole is ensured. In the longitudinal stretching process of the sheet layer, molecular chains in the core layer 1 are orderly arranged to form the core layer 1 with micropores, the formed core layer 1 enters the sizing roller set again for sizing, the structure of the core layer 1 is stable, and the sizes of the micropores tend to be the same and are not easy to deform. The stretching main roller and the stretching auxiliary roller play a role in the lamella, and the back pressure roller plays a role in stabilizing and repressing the lamella, so that the uniform thickness of each point of the lamella is ensured.
Step three: and (3) conveying the core layer 1 into a cooling roller, cooling at the temperature of 30 ℃, enabling the porosity of the core layer 1 to be 20 percent and the average pore diameter of the core layer 1 to be 40nm, carrying out corona treatment, and cutting edges.
Wherein, corona machine power is 3.5kw, and corona machine is equipped with air processor, discharges the harmful gas that corona in-process produced, cuts edge 1 both sides of sandwich layer after the corona treatment, and the waste material after the recovery mixes with the ventilative micelle after drying in step one, reentries the extruder.
And the surface of the core layer 1 has higher adhesiveness by adopting corona treatment, so that the glue hanging in the fourth step is facilitated. And the recovered waste materials in the edge cutting process are processed in the extruder again for recycling.
Step four: and (3) enabling the core layer 1 and the surface layer 2 to enter a compound machine, uniformly compounding by using a hot melt adhesive 3, and rolling a finished product.
The compounding method adopts the compounding of PUR hot melt adhesive and EVA hot melt adhesive, and the proportion of the PUR hot melt adhesive and the EVA hot melt adhesive is 3: 1.
The surface layer 2 is PP anti-sticking super-soft non-woven fabric of Shandong gold Corning machine electro-mechanical products Co. Mix gluey at the primary cure in-process, its cohesion can increase, and curing strength improves gradually, and in the deep curing process, its bonding with sandwich layer 1 and surface course 2 only, inside formation crosslinked structure, curing strength is higher, reduces simultaneously and covers the micropore, ensures the gas permeability of micropore, mixes gluey water resistance, chemical resistance, solvent resistance all with difficult height, self also green. The compounding of the core layer 1 and the surface layer 2 is realized by a compounding machine by adopting a glue mixing compounding method, so that the breathable composite film is formed.
In the breathable composite film of the embodiment, the content of the core layer 1 is 20g/m2The content of the surface layer 2 is 38g/m2The content of the hot melt adhesive 3 is 2g/m2。
Example 3
A preparation process of a breathable composite film for protective isolation clothes comprises the following steps:
the method comprises the following steps: and (3) after drying treatment, sending the air-permeable colloidal particles into an extruder, carrying out tape casting on the air-permeable colloidal particles to form uniform sheets with the thickness of 6 threads, and enabling the sheets to pass through a forming roller set.
Step two: and (3) feeding the sheet layer into a preheating roller, wherein the preheating temperature is 60 ℃, longitudinally stretching the preheated sheet layer by 2.2 times through a stretching roller set to form a core layer 1, and enabling the core layer 1 to pass through a shaping roller set.
Step three: and (3) conveying the core layer 1 into a cooling roller, cooling at the temperature of 30 ℃, enabling the porosity of the core layer 1 to be 23% and the average pore diameter of the core layer 1 to be 46nm, carrying out corona treatment, and cutting edges.
Step four: and (3) enabling the core layer 1 and the surface layer 2 to enter a compound machine, uniformly compounding by using a hot melt adhesive 3, and rolling a finished product.
In the breathable composite film of the embodiment, the content of the core layer 1 is 25g/m2The content of the surface layer 2 is 38g/m2The content of the hot melt adhesive 3 is 2g/m2。
Example 4
A preparation process of a breathable composite film for protective isolation clothes comprises the following steps:
the method comprises the following steps: and (3) after drying treatment, sending the air-permeable colloidal particles into an extruder, carrying out tape casting on the air-permeable colloidal particles to form an 8-silk-thick uniform sheet layer, and enabling the sheet layer to pass through a forming roller set.
Step two: and (3) feeding the sheet layer into a preheating roller, wherein the preheating temperature is 60 ℃, longitudinally stretching the preheated sheet layer by 2.5 times through a stretching roller set to form a core layer 1, and enabling the core layer 1 to pass through a shaping roller set.
Step three: and (3) conveying the core layer 1 into a cooling roller, cooling at the temperature of 30 ℃, enabling the porosity of the core layer 1 to be 25 percent and the average pore diameter of the core layer 1 to be 50nm, carrying out corona treatment, and cutting edges.
Step four: and (3) enabling the core layer 1 and the surface layer 2 to enter a compound machine, uniformly compounding by using a hot melt adhesive 3, and rolling a finished product.
In the breathable composite film of the embodiment, the content of the core layer 1 is 30g/m2The content of the surface layer 2 is 38g/m2The content of the hot melt adhesive 3 is 2g/m2。
Comparative example 1
Common breathable composite membranes are available on the market.
And (3) performance detection:
the performance of the breathable composite films prepared in examples 2-4 and comparative example 1 was tested according to the national standard GB 19082-2009 medical disposable protective garment specification, and the test results are shown in table 1.
Table 1: results of Performance test of examples 2 to 4 and comparative example 1
As can be seen from Table 1, the breathable composite films prepared in examples 2-4 have an average water permeability resistance of higher than 17kPa and a moisture permeability of higher than 6680 g/(m)2D), greater than grade 3 of penetration resistance to synthetic blood, not less than grade 3 of surface moisture resistance, a breaking strength far greater than 45N, and a far greater elongation at break15 percent, the average filtration efficiency is more than 99 percent, and the filter completely meets the technical requirements of GB 19082 plus 2009 medical disposable protective clothing.
In the process for preparing the protective isolation suit, the quality of the breathable colloidal particles is controlled in advance, the stable structure of the lamellar is ensured by cooling and shaping for many times in the middle period, micropores are formed by longitudinal stretching, so that a high-quality core layer 1 is obtained, the thickness of the core layer 1 is uniform, the sizes of the micropores on the surface are substantially consistent, and the high-quality core layer is compounded with the surface layer 2 in the later period by adopting a mixed glue compounding method to ensure the breathability of the micropores and finally form the breathable composite film. The protective isolation suit can be widely applied to high-quality protective isolation suits, and has great market value and social value.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (10)
1. The utility model provides a ventilative complex film is taken to protection isolation which characterized in that: the anti-sticking super-soft heat-insulation composite material comprises a core layer (1) and a surface layer (2), wherein the surface layer (2) is a PP anti-sticking super-soft non-woven fabric, the core layer (1) is a PE breathable film, and the core layer (1) and the surface layer (2) are compounded by adopting a hot melt adhesive (3);
wherein, the core layer (1) is 20-30g/m2Surface layer (2)38g/m22g/m of hot melt adhesive (3)2。
2. The preparation process of the breathable composite film for the protective barrier clothing according to claim 1, characterized by comprising the following steps:
the method comprises the following steps: after drying the air-permeable colloidal particles, sending the air-permeable colloidal particles into an extruder, wherein the temperature of the extruder is 245-;
step two: the sheet layer is sent to a preheating roller, the preheating temperature is 60 ℃, the preheated sheet layer is longitudinally stretched and formed into a core layer (1) by 1.8-2.5 times through a stretching roller set, and the core layer (1) passes through a shaping roller set;
step three: the core layer (1) is sent to a cooling roller, the cooling temperature is 30 ℃, and corona treatment is carried out;
step four: and the core layer (1) and the surface layer (2) enter a compounding machine and are uniformly compounded by adopting a hot melt adhesive (3), and a finished product is wound.
3. The preparation process of the breathable composite film for the protective barrier clothing according to claim 2, wherein the process comprises the following steps: in the first step, the air-permeable colloidal particles are primarily screened and then sent into a dryer, and the temperature of the dryer is controlled to be 70-90 ℃ for 3-5 min.
4. The preparation process of the breathable composite film for the protective barrier clothing according to claim 2, wherein the process comprises the following steps: in the second step, the drawing roller group sequentially passes through two drawing main rollers, two back pressure rollers and two drawing auxiliary rollers.
5. The preparation process of the breathable composite film for the protective barrier clothing according to claim 2, wherein the process comprises the following steps: in the second step, the tension of the sheet layer is controlled to be 5KN in the stretching process.
6. The preparation process of the breathable composite film for the protective barrier clothing according to claim 5, wherein the breathable composite film comprises the following steps: in the third step, the porosity of the core layer (1) is 20-25%, and the average pore diameter of the core layer (1) is 40-50 nm.
7. The preparation process of the breathable composite film for the protective barrier clothing according to claim 4, wherein the process comprises the following steps: the preheating roller is a rubber roller, the stretching main roller is a steel roller, the back pressure roller is a steel roller, the stretching auxiliary roller is a rubber roller, the setting roller is a rubber roller, and the cooling roller is a rubber roller.
8. The preparation process of the breathable composite film for the protective barrier clothing according to claim 2, wherein the process comprises the following steps: in the fourth step, a glue mixing compounding method in a compounding mode adopts the compounding of PUR hot melt glue and EVA hot melt glue, and the proportion of the PUR hot melt glue and the EVA hot melt glue is 3: 1.
9. The preparation process of the breathable composite film for the protective barrier clothing according to claim 2, wherein the process comprises the following steps: in the third step, the power of the corona machine is 3.5kw, and the corona machine is provided with an air processor to discharge harmful gases generated in the corona process.
10. The preparation process of the breathable composite film for the protective barrier clothing according to claim 9, wherein the breathable composite film comprises the following steps: and (3) after the core layer (1) is subjected to corona treatment, cutting edges of two sides of the core layer, mixing the recycled waste material with the air-permeable colloidal particles dried in the step one, and feeding the mixture into the extruder again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010311903.7A CN111531987A (en) | 2020-04-20 | 2020-04-20 | Breathable composite film for protective isolation clothes and preparation process thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112895637A (en) * | 2020-12-31 | 2021-06-04 | 新乐华宝医疗用品有限公司 | Multilayer composite material and preparation method thereof |
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| CN101586009A (en) * | 2009-03-27 | 2009-11-25 | 上海稳健医疗器械有限公司 | Athletic tape and manufacturing method and device thereof |
| CN102614722A (en) * | 2011-01-14 | 2012-08-01 | 帕尔公司 | Gas filter assemblies and methods for filtering gases |
| CN104260379A (en) * | 2014-07-31 | 2015-01-07 | 佛山市联塑万嘉新卫材有限公司 | Method for preparing composite film compounded by non-woven fabric and breathable film |
| CN108570290A (en) * | 2017-03-07 | 2018-09-25 | 伦姆胶带有限公司 | Method and apparatus for adhesive activation |
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| CN101586009A (en) * | 2009-03-27 | 2009-11-25 | 上海稳健医疗器械有限公司 | Athletic tape and manufacturing method and device thereof |
| CN102614722A (en) * | 2011-01-14 | 2012-08-01 | 帕尔公司 | Gas filter assemblies and methods for filtering gases |
| CN104260379A (en) * | 2014-07-31 | 2015-01-07 | 佛山市联塑万嘉新卫材有限公司 | Method for preparing composite film compounded by non-woven fabric and breathable film |
| CN108570290A (en) * | 2017-03-07 | 2018-09-25 | 伦姆胶带有限公司 | Method and apparatus for adhesive activation |
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| CN112895637A (en) * | 2020-12-31 | 2021-06-04 | 新乐华宝医疗用品有限公司 | Multilayer composite material and preparation method thereof |
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Application publication date: 20200814 |