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CN112297562A - High-barrier composite material - Google Patents

High-barrier composite material Download PDF

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Publication number
CN112297562A
CN112297562A CN202011193918.4A CN202011193918A CN112297562A CN 112297562 A CN112297562 A CN 112297562A CN 202011193918 A CN202011193918 A CN 202011193918A CN 112297562 A CN112297562 A CN 112297562A
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China
Prior art keywords
barrier
tpu
parts
film
composite material
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CN202011193918.4A
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Chinese (zh)
Inventor
张积财
李鹏
胡国银
张涛
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Cta Hi Tech Textiles Co ltd
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Cta Hi Tech Textiles Co ltd
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Priority to CN202011193918.4A priority Critical patent/CN112297562A/en
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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
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • 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
    • 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
    • B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
    • B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
    • 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
    • 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
    • B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
    • 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
    • B32B27/40—Layered products comprising a layer of synthetic resin comprising polyurethanes
    • 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
    • B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
    • 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
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • 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
    • B32B37/1284—Application of adhesive
    • 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
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/15—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state
    • B32B37/153—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer being manufactured and immediately laminated before reaching its stable state, e.g. in which a layer is extruded and laminated while in semi-molten state at least one layer is extruded and immediately laminated while in semi-molten state
    • 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
    • B32B38/16—Drying; Softening; Cleaning
    • B32B38/164—Drying
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B64—AIRCRAFT; AVIATION; COSMONAUTICS
    • B64B—LIGHTER-THAN AIR AIRCRAFT
    • B64B1/00—Lighter-than-air aircraft
    • B64B1/06—Rigid airships; Semi-rigid airships
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/18—Manufacture of films or sheets
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02—Non-macromolecular additives
    • C09J11/06—Non-macromolecular additives organic
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
    • C09J175/04—Polyurethanes
    • 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
    • B32B2262/0276—Polyester fibres
    • 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
    • B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
    • 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
    • B32B2307/718—Weight, e.g. weight per square meter
    • 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
    • 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
    • B32B2605/00—Vehicles
    • B32B2605/18—Aircraft
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
    • C08J2375/04—Polyurethanes

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  • Organic Chemistry (AREA)
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  • Aviation & Aerospace Engineering (AREA)
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  • Physics & Mathematics (AREA)
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  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Laminated Bodies (AREA)

Abstract

The invention provides a high-barrier composite material which comprises a high-barrier functional film, an adhesive layer, a framework material layer, an adhesive layer and a high-barrier TPU film which are sequentially adhered and superposed. The high-barrier composite material meets the requirement on tensile strength under the condition of light weight. And improves the helium permeability. Has excellent composite peel strength, outstanding barrier property, excellent environmental resistance and chemical resistance. The application in the special space field is met; the process technology has the characteristics of high production efficiency, energy conservation, environmental protection and flexible process technology, and meanwhile, the textile framework material is low in heating temperature and short in time, so that the strong damage to the framework material is small. The processing precision is high, and the deviation of film thickness control can be controlled within 0.02 mm.

Description

High-barrier composite material
Technical Field
The invention belongs to the technical field of fabric manufacturing, and particularly relates to a high-barrier composite material.
Background
The airtight TPU coated fabric has the performance advantages of high air tightness, high tensile strength, softness, light weight, wear resistance, low-temperature folding resistance, high-frequency welding (high molding processing efficiency), safety, environmental protection and the like, and is an ideal substitute material for rubber coated fabrics and PVC coated fabrics. The material can be widely applied to the fields of medical treatment, military equipment, industry, travel products and the like. The TPU airtight composite material has wide application prospects in the aspects of aerospace, such as airship, stratospheric airship, space balloon and the like, but the TPU film has excellent barrier property to air, but has certain limitations on the application of airship and other special aspects and on the material with high requirement on helium permeability. At present, the high-barrier material in the market of China generally adopts an imported compounded material, or an imported gas barrier film is compounded with domestic base cloth. The invention mainly aims to explore and solve the problems of high cost, lack of independent intellectual property, large-scale production and the like of the high-barrier material applied in the special field.
Disclosure of Invention
In view of the above, the present invention aims to overcome the defects in the prior art, and provide a high-barrier composite material with better barrier property, wherein a high-barrier functional film is added on the back surface of the composite material, so that the barrier property of the material is improved on the basis of not changing the physical property and processability of the original composite material TPU.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a high-barrier composite material comprises a high-barrier functional film, an adhesive layer, a framework material layer, an adhesive layer and a high-barrier TPU film which are sequentially adhered and superposed.
Further, the high-barrier function film is a PE-EVOH-PA-EVOH-PE five-layer co-extrusion film.
The film adopts a multi-layer functional co-extrusion process, has excellent composite peel strength, outstanding barrier property, excellent environmental resistance and chemical resistance, and is mainly used as an important barrier functional film.
Furthermore, the adhesive layer is a hot melt adhesive coating layer, and the gluing amount is 20-30 g/square meter.
The adhesive layer is used as an important part for bonding the high-barrier function and the framework material together, the adhesive adopts an extrusion hot melt adhesive coating process, two surfaces of the adhesive are unreeled at the same time, the middle part of the adhesive is processed and produced in a mode of accurately controlling coating by a die head, and the selected hot melt adhesive has excellent adhesive property and processing property and has excellent adhesive property on the high-barrier function film and the framework material.
Further, the framework material layer is a polyarylate fabric, and the fineness of the polyarylate fabric is 200D.
The polyarylate fabric has excellent mechanical properties, has a tensile strength three times higher than that of a general industrial polyester fiber, has high hydrophobicity, has a very low water content, has good dimensional stability in a dry or wet environment, has good dimensional stability when repeatedly dried or wetted, does not retain water in the fiber even in a high-temperature atmosphere, and therefore, when used as a reinforcing material, does not emit entrained water when molded in a heated environment, and has little influence on a base resin during molding. The physical property change of the polyarylate fiber caused by the environmental change is small. The fabric is suitable for being used under strict conditions. Meanwhile, the polyarylate fabric also has heat aging resistance, interfiber abrasion resistance, chemical resistance and the like under a dry and wet environment.
The breaking strength of the 200D polyarylate fabric base cloth is more than or equal to 2000N, the tearing strength is more than or equal to 100N, the characteristics of low gram weight, high strength and the like are realized, and the requirements of light weight and high strength in the practical application process are met.
Further, the adhesive layer comprises the following raw material formula in parts by weight: 100 parts of PU glue, 5-10 parts of polyisocyanate bridging agent, 1-3 parts of antioxidant master batch, 1-3 parts of anti-ultraviolet master batch and 20-30 layers of diluent.
The adhesive is mainly used for bonding a framework material and a TPU film, adopts solvent type low-temperature resistant PU, and has excellent low-temperature performance and ultraviolet resistance.
Further, the high-resistance TPU film comprises the following raw material formula in parts by weight: 100 parts of high-barrier TPU, 2-4 parts of anti-sticking master batch, 4-8 parts of special color master batch and 1-3 parts of anti-ultraviolet master batch.
The film has excellent abrasion resistance, tensile properties and air tightness.
A method of making a high barrier composite characterized by: the method comprises the following steps:
one) adhesive sizing process of framework material layer: weighing the components according to a formula according to a specified requirement, mixing the components by using a high-speed mixer, wherein the mixing time is not more than 20min, placing the slurry after preparation for 30min for defoaming, feeding the slurry by using a coating machine, controlling the amount of the coated slurry to be 20-30g, and drying the coated slurry in an oven at 120-140 ℃ for 2-3 min to obtain the TPU composite material;
II) preparing a high-resistance TPU film: weighing the components according to the formula requirement, mixing the components through a high-speed mixer, drying the mixture at the temperature of 70-90 ℃ for 2-4 h, compounding the dried material with the TPU composite material obtained in the first step through casting extrusion equipment, wherein the extrusion temperature is 180-210 ℃;
thirdly), compounding a high-barrier functional film on the back surface of the TPU composite material obtained in the step one, wherein the high-barrier functional film is a five-layer co-extruded film of PE-EVOH-PA-EVOH-PE purchased from the outside, the high-barrier functional film is attached to the back surface of the TPU composite material through a hot melt adhesive compounding machine, the gluing amount is 10-20 g, the laminating pressure is 0.1-0.3 Mpa, and the temperature is controlled at 90-110 ℃ during lamination. And curing for 12-24 hours in an environment with humidity of 80-95% and temperature of 20-30 ℃ after rolling.
The principle is as follows: the high-barrier functional film is combined with the TPU composite material through PUR hot melt adhesive composite equipment, so that the defect of low helium permeability of the traditional TPU composite material is overcome. The helium permeability of the traditional TPU composite material is 1-2L/m224h 0.1Mpa, the helium permeability of the whole composite high-barrier functional film material is reduced to 0.1-0.3L L/m224h 0.1Mpa while maintaining excellent breaking and tearing strength of the composite.
Compared with the prior art, the invention has the beneficial effects that:
(1) the high-barrier composite material adopts high-performance fiber fabric polyarylate with light weight and high strength, and meets the requirement on tensile strength under the condition of light weight. Meanwhile, the TPU composite material has the function of improving the poor helium permeability, and the high-barrier coextruded film is compounded on the back surface to improve the helium permeability, so that the TPU composite material can be applied to special aspects such as airship and the like. The high-barrier material produced by the tape casting extrusion process and the hot melt adhesive compounding process has excellent compound peeling strength, outstanding barrier property, and excellent environmental resistance and chemical resistance. The application in the special space field is satisfied.
(2) The high-barrier composite material combines the innovative TPU casting and laminating technology and the PUR hot melt adhesive compounding technology, so that the process technology has the characteristics of high production efficiency, energy conservation, environmental protection and flexible process technology, overcomes the limitation of harsh requirements of the calendering coating method process on the viscosity of the polyurethane adhesive, can add few or no additives such as an anti-sticking agent, a lubricant and the like to the adopted polyurethane adhesive, and avoids the influence of the additives on the performance of the adhesive. Meanwhile, the textile framework material is low in heating temperature and short in time, so that the strength damage to the framework material is small. The processing precision is high, and the deviation of film thickness control can be controlled within 0.02 mm.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic overall cross-sectional view of a high-barrier composite material according to the present invention.
Description of reference numerals:
1-high barrier functional film; 2-an adhesive layer; 3-a skeleton material layer; 4-an adhesive layer; 5-high resistance TPU film.
Detailed Description
Unless defined otherwise, technical terms used in the following examples have the same meanings as commonly understood by one of ordinary skill in the art to which the present invention belongs. The test reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the experimental methods are conventional methods unless otherwise specified.
The present invention will be described in detail with reference to examples.
Example 1: preparing a composite material:
one) adhesive sizing process of framework material layer: weighing the components according to a formula according to a specified requirement, mixing the components by using a high-speed mixer, wherein the mixing time is not more than 20min, placing the slurry after preparation for 30min for defoaming, feeding the slurry by using a coating machine, controlling the amount of the coated slurry to be 20-30g, and drying the coated slurry in an oven at 120-140 ℃ for 2-3 min to obtain the TPU composite material;
II) preparing a high-resistance TPU film: weighing the components according to the formula requirement, mixing the components through a high-speed mixer, drying the mixture at the temperature of 70-90 ℃ for 2-4 h, compounding the dried material with the TPU composite material obtained in the first step through casting extrusion equipment, wherein the extrusion temperature is 180-210 ℃;
thirdly), compounding a high-barrier functional film on the back surface of the TPU composite material obtained in the step one, wherein the high-barrier functional film is a five-layer co-extruded film of PE-EVOH-PA-EVOH-PE purchased from the outside, the high-barrier functional film is attached to the back surface of the TPU composite material through a hot melt adhesive compounding machine, the gluing amount is 10-20 g, the laminating pressure is 0.1-0.3 Mpa, and the temperature is controlled at 90-110 ℃ during lamination. And curing for 12-24 hours in an environment with humidity of 80-95% and temperature of 20-30 ℃ after rolling.
Example 2:
firstly, an adhesive gluing process of a framework material layer: the same preparation method as in example 1;
secondly, preparing a high-resistance TPU film: weighing the components according to the formula requirement, mixing the components through a high-speed mixer, drying the mixture at the temperature of 70-90 ℃ for 2-4 h, compounding the dried material with the TPU composite material obtained in the first step through calendering and extruding equipment, and extruding at the temperature of 180-210 ℃;
and thirdly, compounding a high-barrier functional film on the back surface of the TPU composite material obtained in the step one, wherein the high-barrier functional film is a five-layer co-extruded film of PE-EVOH-PA-EVOH-PE purchased from the outside, the high-barrier functional film is attached to the back surface of the TPU composite material through a hot melt adhesive compounding machine, the gluing amount is 10-20 g, the laminating pressure is 0.1-0.3 Mpa, and the temperature is controlled at 90-110 ℃ during lamination. And curing for 12-24 hours in an environment with humidity of 80-95% and temperature of 20-30 ℃ after rolling. Finally, a comparative material was prepared.
Example 3: the composite and comparative materials were tested for strength:
table 1 strength test results
Figure BDA0002753457290000041
As can be seen from Table 1: compared with a calendering laminating method, the curtain coating laminating method has the advantages that the binding force between the film and the framework material is good, and the strength loss is less.
Example 4: performance testing of the composite material and the non-composite material:
TABLE 2 results of aging test
Figure BDA0002753457290000051
As can be seen from Table 2, the composite material had no loss in breaking strength and tearing strength.
Example 5: composite Performance testing
Table 3 composite property data
Inspection item The invention
Material of 200D polyarylester single-side TPU coated film and back composite high-barrier functional film
Mass per unit area ≤380g/m2
Drawing strength strip sample method ≥1500N
Rate of permeation of helium ≤0.5L/(m2.24h.1atm)
Aging xenon lamp for 800h The color difference of the surface coating is small, and the problems of cracking, falling off, pulverization and the like do not occur
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (7)

1. The high-barrier composite material is characterized by comprising a high-barrier functional film (1), an adhesive layer (2), a framework material layer (3), an adhesive layer (4) and a high-barrier TPU film (5) which are sequentially adhered and superposed.
2. A high barrier composite according to claim 1, wherein: the high-barrier functional film (1) is a PE-EVOH-PA-EVOH-PE five-layer co-extrusion film.
3. A high barrier composite according to claim 1, wherein: the adhesive layer (2) is a hot melt adhesive coating layer, and the gluing amount is 20-30 g/square meter.
4. A high barrier composite according to claim 1, wherein: the framework material layer (3) is a polyarylate fabric, and the fineness of the polyarylate fabric is 200D.
5. A high barrier composite according to claim 1, wherein: the adhesive layer (4) comprises the following raw material formula in parts by weight: 100 parts of PU glue, 5-10 parts of polyisocyanate bridging agent, 1-3 parts of antioxidant master batch, 1-3 parts of anti-ultraviolet master batch and 20-30 layers of diluent.
6. A high barrier composite according to claim 1, wherein: the high-resistance TPU film (5) comprises the following raw material formula in parts by weight: 100 parts of high-barrier TPU, 2-4 parts of anti-sticking master batch, 4-8 parts of special color master batch and 1-3 parts of anti-ultraviolet master batch.
7. A method of preparing a high barrier composite according to any one of claims 1 to 6, characterized in that: the method comprises the following steps:
one) adhesive sizing process of the framework material layer (3): weighing the components according to a formula according to a specified requirement, mixing the components by using a high-speed mixer, wherein the mixing time is not more than 20min, placing the slurry after preparation for 30min for defoaming, feeding the slurry by using a coating machine, controlling the amount of the coated slurry to be 20-30g, and drying the coated slurry in an oven at 120-140 ℃ for 2-3 min to obtain the TPU composite material;
II) preparing a high-resistance TPU film (5): weighing the components according to the formula requirement, mixing the components through a high-speed mixer, drying the mixture at the temperature of 70-90 ℃ for 2-4 h, compounding the dried material with the TPU composite material obtained in the first step through casting extrusion equipment, wherein the extrusion temperature is 180-210 ℃;
thirdly), compounding a high-barrier functional film (1) on the back surface of the TPU composite material obtained in the first step, wherein the high-barrier functional film (1) is a five-layer co-extruded film of PE-EVOH-PA-EVOH-PE purchased from the outside, the high-barrier functional film (1) is attached to the back surface of the TPU composite material through a hot melt adhesive compounding machine, the gluing amount is 10-20 g, the laminating pressure is 0.1-0.3 Mpa, and the temperature is controlled at 90-110 ℃ during laminating. And curing for 12-24 hours in an environment with humidity of 80-95% and temperature of 20-30 ℃ after rolling.
CN202011193918.4A 2020-10-30 2020-10-30 High-barrier composite material Pending CN112297562A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117734263A (en) * 2023-12-19 2024-03-22 浙江赛飞普诺科技发展有限公司 Broad-spectrum long-acting chemical protective clothing
CN118269388A (en) * 2024-03-22 2024-07-02 东莞市雄林新材料科技股份有限公司 Polyurethane multilayer composite cloth forming process

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117734263A (en) * 2023-12-19 2024-03-22 浙江赛飞普诺科技发展有限公司 Broad-spectrum long-acting chemical protective clothing
CN117734263B (en) * 2023-12-19 2024-08-06 浙江赛飞普诺科技发展有限公司 Broad-spectrum long-acting chemical protective clothing
CN118269388A (en) * 2024-03-22 2024-07-02 东莞市雄林新材料科技股份有限公司 Polyurethane multilayer composite cloth forming process

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Application publication date: 20210202