CN111590988B - Processing method of NY/RCPP composite film for high-temperature steaming bag - Google Patents

Processing method of NY/RCPP composite film for high-temperature steaming bag Download PDF

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CN111590988B
CN111590988B CN202010378396.9A CN202010378396A CN111590988B CN 111590988 B CN111590988 B CN 111590988B CN 202010378396 A CN202010378396 A CN 202010378396A CN 111590988 B CN111590988 B CN 111590988B
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rcpp
temperature
nylon
processing method
composite film
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CN111590988A (en
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茆贵云
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Hefei Foside New Material Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
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    • 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
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
    • B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
    • B32B27/285—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyethers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • 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
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    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
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    • B65D65/40—Applications of laminates for particular packaging purposes
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2007/00—Flat articles, e.g. films or sheets
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    • B32—LAYERED PRODUCTS
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    • B32B2250/00—Layers arrangement
    • B32B2250/24—All layers being polymeric
    • B—PERFORMING OPERATIONS; TRANSPORTING
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    • B32B2270/00—Resin or rubber layer containing a blend of at least two different 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
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/50—Properties of the layers or laminate having particular mechanical properties
    • B32B2307/558—Impact strength, toughness
    • 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
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • 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
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B32B2439/46—Bags
    • 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
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • 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
    • C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
    • C08J2323/26—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment
    • C08J2323/28—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers modified by chemical after-treatment by reaction with halogens or halogen-containing compounds
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    • 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
    • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
    • C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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    • C08J2429/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
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    • C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
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Abstract

The invention discloses a processing method of an NY/RCPP composite membrane for a high-temperature cooking bag, which relates to the technical field of composite membranes.

Description

Processing method of NY/RCPP composite film for high-temperature steaming bag
The technical field is as follows:
the invention relates to the technical field of composite films, in particular to a processing method of an NY/RCPP composite film for a high-temperature steaming bag.
Background art:
the high-temperature steaming bag is a composite plastic film bag capable of being heated, and has the advantages of both can container and boiling-water-resistant plastic bag. The food can be kept in a high-temperature cooking bag, sterilized and heated at high temperature (generally 120-135 ℃) and taken out for eating. The use for many years proves that the packaging container is an ideal sale packaging container, is suitable for packaging meat and bean products, is convenient, sanitary and practical, can well keep the original flavor of food, and is more popular with consumers.
Early high-temperature cooking bags adopt aluminum-plastic composite films, generally have three layers, and the typical structure is a surface layer/adhesive/aluminum foil/adhesive/heat sealing layer, so that the high-temperature cooking bags have high barrier property and high-temperature cooking resistance, are light and soft, and are widely used for packaging various foods. Later, the food packaged with the aluminum foil laminated film was not suitable for consumers to purchase because the food was opaque so that the color and shape of the contents were not visible to consumers, and the aluminum-plastic laminated package was not heated by microwave and was expensive compared to the plastic film. It would be desirable to replace the aluminum-plastic composite film with a packaging material that has barrier properties similar to those of the aluminum-plastic composite film, but is fully transparent and resistant to autoclaving.
The invention content is as follows:
the technical problem to be solved by the invention is to provide a processing method of an NY/RCPP composite membrane for a high-temperature cooking bag, wherein the NY/RCPP composite membrane with a two-layer structure is prepared by a processing method with simple process and simple and convenient operation, the prepared composite membrane has the advantages of NY and RCPP, and the use performance of the prepared composite membrane is further optimized by adding a processing aid, so that the prepared composite membrane is suitable for being used as a processing material of the high-temperature cooking bag.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
the processing method of the NY/RCPP composite film for the high-temperature cooking bag comprises the following processing procedures:
(1) weighing nylon, poly (methyl vinyl ether/maleic acid) copolymer and anti-blocking agent, and uniformly mixing to obtain an NY layer mixture;
(2) weighing cooking-grade chlorinated polypropylene, an epsilon-caprolactone/polyether/epoxypropane terpolymer and an anti-blocking agent, and uniformly mixing to obtain an RCPP layer mixture;
(3) respectively feeding the NY layer mixture and the RCPP layer mixture into respective screw extruders, and carrying out melting plasticization to obtain an NY layer melt and an RCPP layer melt; and filtering the melt by a filter, then pumping the filtered melt to a die head by a metering pump to converge, casting, cooling and forming, and finally rolling and cutting into finished film rolls with corresponding specifications according to the requirements of customers.
The mass ratio of the nylon, the poly (methyl vinyl ether/maleic acid) copolymer and the anti-blocking agent is 100 (3-12) to (1-5).
The nylon is selected from one or more of nylon 6, nylon 12 and nylon 66.
The weight ratio of the boiling-grade chlorinated polypropylene to the epsilon-caprolactone/polyether/propylene oxide terpolymer to the anti-blocking agent is 100 (5-20) to 1-5.
The anti-blocking agent is one or more of erucamide, stearamide, calcium stearate, zinc stearate, polyethylene wax and polypropylene wax.
The temperature of the extruder is 130-250 ℃, and the temperature of the die head is 130-250 ℃.
The temperature of the cooling roller during cooling is 20-30 ℃.
The composite effect of the NY layer and the RCPP layer is ensured by adding the poly (methyl vinyl ether/maleic acid) copolymer in the NY layer, the firm adhesion of the contact surface of the NY layer and the RCPP layer is promoted by utilizing the adhesiveness of the poly (methyl vinyl ether/maleic acid) copolymer, the problems of an adhesive coating process and adhesive input cost which are increased when an adhesive is additionally used for compounding the NY layer and the RCPP layer and the potential safety hazard in use of a conventional solvent type adhesive are solved, and meanwhile, the mechanical property of the composite film can be improved by adding the poly (methyl vinyl ether/maleic acid) copolymer.
The application performance of the composite film is optimized by adding the epsilon-caprolactone/polyether/propylene oxide terpolymer into the RCPP layer, and the composite film is particularly suitable for being used as a cooking packaging bag for freezing and preserving food by utilizing the low-temperature flexibility and the thermal stability of the epsilon-caprolactone/polyether/propylene oxide terpolymer.
The anti-blocking agents are all materials with anti-blocking effect known in the field, can exert good anti-blocking effect, but do not have the effect of optimizing the mechanical performance of the film, and the inventor obtains the 2- (1H-benzopyrazol-1-yl) acetamide by screening the existing materials, wherein the materials have the anti-blocking effect and can optimize the mechanical performance of the film to a certain extent.
The anti-blocking agent is 2- (1H-benzopyrazol-1-yl) acetamide. Although 2- (1H-benzopyrazol-1-yl) acetamide is a known compound, the use of the compound as an anti-blocking agent is not known in the prior art and common general knowledge in the field, and the present invention achieves the technical effect of optimizing the mechanical properties of film processability by using the compound as an anti-blocking agent. The structural formula of 2- (1H-benzopyrazol-1-yl) acetamide is as follows:
Figure BDA0002481099000000031
the invention has the beneficial effects that: the nylon and the cooking-grade chlorinated polypropylene are used as main materials, the NY/RCPP composite membrane with a two-layer structure is prepared by adding the processing aid, the prepared composite membrane has the advantages of NY and RCPP, the use performance of the prepared composite membrane is further optimized by adding the processing aid, and the prepared composite membrane is non-toxic and harmless, has excellent mechanical property, barrier property and heat resistance, and is suitable for being used as a high-temperature cooking bag processing material.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
Nylon 6 was purchased from plastic chemical Co., Ltd, Dongguan city; poly (methyl vinyl ether/maleic acid) copolymers are available from new materials, inc, solid in north Hubei; cooking grade chlorinated polypropylene was purchased from Wen Ge plastification, Suzhou; the epsilon-caprolactone/polyether/propylene oxide terpolymer is prepared by adopting a synthetic method disclosed by Yining and the like in the chemical propellant and high polymer material 2016, volume 14, phase 1;
example 1
(1) Weighing 100g of nylon 6, 8g of poly (methyl vinyl ether/maleic acid) copolymer and 2g of stearamide, and uniformly mixing to obtain an NY layer mixture;
(2) weighing 100g of cooking grade chlorinated polypropylene, 12g of epsilon-caprolactone/polyether/propylene oxide terpolymer and 2g of stearamide, and uniformly mixing to obtain an RCPP layer mixture;
(3) respectively feeding the NY layer mixture and the RCPP layer mixture into respective screw extruders, and carrying out melting plasticization, wherein the temperature of the extruder I area of the NY layer mixture is 220 ℃, the temperature of the extruder II area is 230 ℃, the temperature of the extruder III area is 240 ℃, the temperature of the extruder IV area is 240 ℃, the temperature of the extruder V area is 230 ℃, the temperature of the extruder I area of the RCPP layer mixture is 130 ℃, the temperature of the extruder II area is 140 ℃, the temperature of the extruder III area is 150 ℃, the temperature of the extruder IV area is 140 ℃, and the temperature of the extruder V area is 140 ℃, so that NY layer melt and RCPP layer melt are obtained; filtering the melt by a filter, then pumping the filtered melt to a die head by a metering pump to converge, wherein the temperature of the die head is 230 ℃, performing tape casting cooling forming, cooling by a cooling roller at 25 ℃, and finally rolling and cutting into finished film rolls with corresponding specifications according to the requirements of customers, wherein the film thickness is 80 mu m.
Example 2
Example 2 differs from example 1 in that the antiblocking agent was replaced with an equal amount of zinc stearate and the rest of the procedure was exactly the same.
Example 3
Example 3 differs from example 1 in that the antiblocking agent is replaced by an equal amount of 2- (1H-benzopyrazol-1-yl) acetamide and the rest is exactly the same.
Comparative example 1
Comparative example 1 differs from example 1 in that no poly (methyl vinyl ether/maleic acid) copolymer was added to the NY layer and the rest of the procedure was exactly the same.
Comparative example 2
Comparative example 2 differs from example 1 in that the epsilon caprolactone/polyether/propylene oxide terpolymer was not added to the RCPP layer and the rest of the procedure was exactly the same.
The composite films obtained in the above examples and comparative examples were measured for tensile strength at yield, tensile strength at break and elongation at yield and break in accordance with ISO 527-3-2018, and the results are shown in Table 1.
TABLE 1
Figure BDA0002481099000000041
As can be seen from Table 1, the above examples can improve the mechanical properties of the composite films by adding 2- (1H-benzopyrazol-1-yl) acetamide as an anti-blocking agent and poly (methyl vinyl ether/maleic acid) copolymer and epsilon-caprolactone/polyether/propylene oxide terpolymer.
The composite membrane prepared in the above example is boiled in water at 121 ℃ for 30min or at 135 ℃ for 15min, and the test result shows that: the surface of the composite membrane does not wrinkle and deform, and toxic and harmful substances are not released.
The oxygen transmission capacity of the composite membrane prepared in the above example is measured according to GB/T1038-2000 pressure differential method for testing gas permeability of plastic membrane and thin sheet, and is less than 0.5cm3/(m224 h.0.1mpa); the water vapor transmission of the composite films prepared in the above examples is less than 0.5 g/(m) according to GB/T1037-88 cup method for testing Water vapor Permeability of Plastic films and sheets2.24h)。
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (5)

1. The processing method of the NY/RCPP composite film for the high-temperature cooking bag is characterized by comprising the following steps: the method comprises the following processing procedures:
(1) weighing nylon, poly (methyl vinyl ether/maleic acid) copolymer and anti-blocking agent, and uniformly mixing to obtain an NY layer mixture;
(2) weighing cooking-grade chlorinated polypropylene, an epsilon-caprolactone/polyether/epoxypropane terpolymer and an anti-blocking agent, and uniformly mixing to obtain an RCPP layer mixture;
(3) respectively feeding the NY layer mixture and the RCPP layer mixture into respective screw extruders, and carrying out melting plasticization to obtain an NY layer melt and an RCPP layer melt; filtering the melt by a filter, then pumping the filtered melt to a die head by a metering pump to converge, casting, cooling and forming, and finally rolling and cutting into finished film rolls with corresponding specifications according to the requirements of customers;
the mass ratio of the nylon, the poly (methyl vinyl ether/maleic acid) copolymer and the anti-blocking agent is 100 (3-12) to (1-5);
the weight ratio of the boiling-grade chlorinated polypropylene to the epsilon-caprolactone/polyether/propylene oxide terpolymer to the anti-blocking agent is 100 (5-20) to 1-5.
2. The processing method of the NY/RCPP composite film for the high-temperature retort pouch according to claim 1, characterized in that: the nylon is selected from one or more of nylon 6, nylon 12 and nylon 66.
3. The processing method of the NY/RCPP composite film for the high-temperature retort pouch according to claim 1, characterized in that: the anti-blocking agent is one or more of erucamide, stearamide, calcium stearate, zinc stearate, polyethylene wax and polypropylene wax.
4. The processing method of the NY/RCPP composite film for the high-temperature retort pouch according to claim 1, characterized in that: the temperature of the extruder is 130-250 ℃, and the temperature of the die head is 130-250 ℃.
5. The processing method of the NY/RCPP composite film for the high-temperature retort pouch according to claim 1, characterized in that: the temperature of the cooling roller during cooling is 20-30 ℃.
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