CN114229246A - Flexible container for buffer solution - Google Patents
Flexible container for buffer solution Download PDFInfo
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- CN114229246A CN114229246A CN202111558575.1A CN202111558575A CN114229246A CN 114229246 A CN114229246 A CN 114229246A CN 202111558575 A CN202111558575 A CN 202111558575A CN 114229246 A CN114229246 A CN 114229246A
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- 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
- B65D88/00—Large containers
- B65D88/16—Large containers flexible
- B65D88/22—Large containers flexible specially adapted for transport
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- 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
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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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
- B32B27/32—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
- 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
- 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
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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
- 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
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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- 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
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
-
- 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
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/582—Tearability
- B32B2307/5825—Tear resistant
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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
- B32B2307/714—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
- B32B2439/00—Containers; Receptacles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
Abstract
The invention provides a flexible container for buffer solution, which sequentially comprises a plastic woven fabric layer, an adhesive layer and a polyethylene plastic layer; the plastic woven cloth layer is made of polypropylene, ethylene-propylene random copolymer, maleic anhydride grafted polypropylene, nano silicon dioxide and a first antioxidant; the adhesive layer is made of polyethylene and ethylene-methacrylic acid copolymer; the polyethylene plastic layer consists of 5 layers, and the outer layer is made of low-density polyethylene, ethylene-vinyl acetate copolymer, calcium stearate and a second antioxidant; the secondary outer layer is made of low-density polyethylene, ethylene-methacrylic acid copolymer and epoxy resin; the middle layer is made of linear low-density polyethylene, high-density polyethylene, ethylene-vinyl alcohol copolymer, a second antioxidant and a lubricant; the secondary inner layer is made of low-density polyethylene, ethylene-methacrylic acid copolymer and epoxy resin; the inner layer is made of low density polyethylene, linear low density polyethylene and metallocene polyethylene. The flexible freight bag for the buffer solution has good acid and alkali resistance.
Description
Technical Field
The invention belongs to the technical field of ton bag processing and manufacturing, and particularly relates to a flexible freight bag for buffer solution.
Background
The container bag for buffer solution is a novel soft packaging container capable of storing and transporting various non-dangerous liquid cargos. Can replace the traditional packages of expensive tank boxes, iron drums and the like in the transportation of non-dangerous liquid. Because the empty box return transportation cost and the cleaning cost are not needed, the cross contamination of the goods can be effectively avoided, the costs of loading, unloading, packaging, material management and the like are greatly reduced, the requirements of environmental protection and buffer solution packaging are met, the raw materials of the product have no pollution to the environment, and the method is suitable for transportation modes such as sea transportation, railway transportation, land transportation and the like. Compared with the traditional transportation and packaging mode, the packaging method has obvious economic advantages, so the packaging method is widely applied to the fields of various chemical industry, petroleum, food, feed, agricultural products and the like. The buffer solution stock solution has strong acidity and alkalinity, so a special flexible freight bag needs to be developed according to the characteristics of the buffer solution stock solution.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a bulk bag for buffer solution, which has good acid and alkali resistance.
The invention provides a container bag for buffer solution, which comprises the following components in sequence from outside to inside: plastic woven fabric layer, adhesive layer, polyethylene plastic layer;
the plastic woven cloth layer is prepared from the following components in parts by weight: 100 parts of polypropylene, 20-30 parts of ethylene-propylene random copolymer, 0.7-1.2 parts of maleic anhydride grafted polypropylene, 0.3-0.5 part of nano silicon dioxide and 0.1-0.3 part of first antioxidant;
the adhesive layer is prepared from the following components in parts by weight: 100 parts of polyethylene with the mark of PX3747 and 35-40 parts of ethylene-methacrylic acid copolymer;
the polyethylene plastic layer consists of 5 layers which are sequentially as follows: an outer layer, a secondary outer layer, a middle layer, a secondary inner layer and an inner layer;
the outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 10-15 parts of ethylene-vinyl acetate copolymer, 1-3 parts of calcium stearate and 0.1-0.3 part of second antioxidant;
the secondary outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 25-30 parts of ethylene-methacrylic acid copolymer and 8-12 parts of epoxy resin;
the middle layer is prepared from the following components in parts by weight: 100 parts of linear low-density polyethylene, 15-20 parts of high-density polyethylene, 10-15 parts of ethylene-vinyl alcohol copolymer, 0.1-0.3 part of second antioxidant and 0.1-0.3 part of lubricant;
the secondary inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 15-20 parts of ethylene-methacrylic acid copolymer and 15-20 parts of epoxy resin;
the inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 50-60 parts of linear low-density polyethylene and 20-30 parts of metallocene polyethylene.
The PX3747 polyethylene is white particle, is a binding resin, and has the advantages of high strength, good toughness, high rigidity, good heat and drought resistance, good environmental stress cracking resistance, impact resistance and tearing resistance.
Preferably, the low-density polyethylene is prepared from the following components in parts by weight: 10 parts of low-density polyethylene with the brand number FB3003, 1-2 parts of low-density polyethylene with the brand number R300 and 3-5 parts of low-density polyethylene with the brand number 15303.
Preferably, the linear low density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042, 6-8 parts of linear low-density polyethylene with the trade name of SP1520 and 2-4 parts of linear low-density polyethylene with the trade name of SP 2020.
Preferably, the metallocene polyethylene is prepared from the following components in parts by weight: 3-5 parts of metallocene polyethylene with the trademark of 1018MF, 1-3 parts of metallocene polyethylene with the trademark of 2010HE, 2-4 parts of metallocene polyethylene with the trademark of 2703MC and 4-6 parts of metallocene polyethylene with the trademark of EF601 AA.
Preferably, the first antioxidant is butylhydroxytoluene; and/or
The second antioxidant is antioxidant 1010 and/or antioxidant 164.
Preferably, the high density polyethylene has a molecular weight of 50 to 80 ten thousand.
Preferably, the lubricant is oleamide.
Preferably, the thickness of the plastic woven cloth is as follows: 50-70 μm, the thickness of the adhesive layer is: 10-15 μm; the thickness of the outer layer is as follows: 70-75 μm; the thickness of the secondary outer layer is as follows: 38-42 μm; the thickness of the intermediate layer is as follows: 350-; the thicknesses of the secondary inner layers are as follows: 40-45 μm; the thickness of the inner layer is as follows: 80-90 μm.
The invention also provides a preparation method of the bulk bag for the buffer solution, which comprises the following steps:
(1) preparing plastic woven cloth: uniformly stirring and mixing raw materials of the plastic woven cloth layer, extruding the mixture into a film, cooling, cutting and stretching the film to form flat wires, cooling the flat wires, weaving the flat wires into a barrel material in a warp-weft staggered manner, and rolling the barrel material into the plastic woven cloth;
(2) preparing a polyethylene plastic layer: the method comprises the following steps of firstly, uniformly mixing the components of the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer according to the formula amount, and then co-extruding the mixture into a layer by five-layer co-extrusion film blowing equipment, wherein the five layers are as follows from outside to inside: cooling the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer, then performing static electricity removal treatment, and finally winding the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer into a polyethylene plastic film;
(3) preparation of bulk bags for buffer: and (3) heating the raw materials of the bonding layer, extruding and coating the raw materials of the bonding layer on the plastic woven cloth prepared in the step (1) and the polyethylene plastic film prepared in the step (2), then bonding the outer layer of the polyethylene plastic film on the plastic woven cloth through the bonding layer, extruding and forming by using a compound roller, rolling and making a bag.
Preferably, the parameters during film blowing are as follows: the temperature of the screw cylinder is 130-160 ℃, the temperature of the die head is 160-200 ℃, and the blow-up ratio is 2.2-2.8.
The inventor of the present invention conducted experiments on low density polyethylene, linear low density polyethylene and metallocene polyethylene of different brands, and found that when the brands of the product described in the present invention are used in combination, the acid and alkali resistance and the tear resistance of the prepared bulk bag are significantly enhanced, and the bulk bag for buffer solution of the present invention has good acid and alkali resistance and tear resistance, so that the bulk bag can be suitably used for containing buffer solutions of different pH values.
Detailed Description
The following examples are given to facilitate a better understanding of the invention, but do not limit the invention. The experimental procedures in the following examples are conventional unless otherwise specified. The test materials used in the following examples are commercially available unless otherwise specified.
The bulk bags for buffer solution of the invention are sequentially from outside to inside: plastic woven fabric layer, bonding layer, polyethylene plastic layer.
The plastic woven cloth layer is prepared from the following components in parts by weight: 100 parts of polypropylene, 20-30 parts of ethylene-propylene random copolymer, 0.7-1.2 parts of maleic anhydride grafted polypropylene, 0.3-0.5 part of nano silicon dioxide and 0.1-0.3 part of first antioxidant.
The ethylene-propylene random copolymer has better impact resistance than polypropylene and polyethylene.
The first antioxidant is butyl hydroxy toluene.
The adhesive layer is prepared from the following components in parts by weight: 100 parts of polyethylene with the mark of PX3747 and 35-40 parts of ethylene-methacrylic acid copolymer.
The polyethylene plastic layer comprises from outside to inside in sequence: an outer layer, a sub-outer layer, a middle layer, a sub-inner layer and an inner layer.
The outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 10-15 parts of ethylene-vinyl acetate copolymer, 1-3 parts of calcium stearate and 0.1-0.3 part of second antioxidant.
The secondary outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 25-30 parts of ethylene-methacrylic acid copolymer and 8-12 parts of epoxy resin.
The middle layer is prepared from the following components in parts by weight: 100 parts of linear low-density polyethylene, 15-20 parts of high-density polyethylene, 10-15 parts of ethylene-vinyl alcohol copolymer, 0.1-0.3 part of second antioxidant and 0.1-0.3 part of lubricant.
The high density polyethylene has a molecular weight of 50 to 80 ten thousand.
The second antioxidant can be antioxidant 1010 or antioxidant 164, or antioxidant 1010 and antioxidant 164 are mixed in any proportion; preferably, the two are mixed in equal weight ratio. When the two antioxidants are mixed for use, the antioxidant effect is better than that of a single antioxidant.
The lubricant is oleamide.
The secondary inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 15-20 parts of ethylene-methacrylic acid copolymer and 15-20 parts of epoxy resin.
The inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 50-60 parts of linear low-density polyethylene and 20-30 parts of metallocene polyethylene.
The low-density polyethylene is prepared from the following components in parts by weight: 10 parts of low-density polyethylene with the brand number FB3003, 1-2 parts of low-density polyethylene with the brand number R300 and 3-5 parts of low-density polyethylene with the brand number 15303.
The linear low-density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042, 6-8 parts of linear low-density polyethylene with the trade name of SP1520 and 2-4 parts of linear low-density polyethylene with the trade name of SP 2020.
The metallocene polyethylene is prepared from the following components in parts by weight: 3-5 parts of metallocene polyethylene with the trademark of 1018MF, 1-3 parts of metallocene polyethylene with the trademark of 2010HE, 2-4 parts of metallocene polyethylene with the trademark of 2703MC and 4-6 parts of metallocene polyethylene with the trademark of EF601 AA.
The preparation method of the bulk bag for the buffer solution comprises the following steps:
(1) preparing plastic woven cloth: uniformly stirring and mixing raw materials of the plastic woven cloth layer, extruding the mixture into a film, cooling, cutting and stretching the film to form flat wires, cooling the flat wires, weaving the flat wires into a barrel material in a warp-weft staggered manner, and rolling the barrel material into the plastic woven cloth;
(2) preparing a polyethylene plastic layer: the method comprises the following steps of firstly, uniformly mixing the components of the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer according to the formula amount, and then co-extruding the mixture into a layer by five-layer co-extrusion film blowing equipment, wherein the five layers are as follows from outside to inside: cooling the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer, then performing static electricity removal treatment, and finally winding the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer into a polyethylene plastic film;
the parameters during film blowing are as follows: the temperature of the screw cylinder is 130-160 ℃, the temperature of the die head is 160-200 ℃, and the blow-up ratio is 2.2-2.8.
(3) Preparation of bulk bags for buffer: and (3) heating the raw materials of the bonding layer, extruding and coating the raw materials of the bonding layer on the plastic woven cloth prepared in the step (1) and the polyethylene plastic film prepared in the step (2), then bonding the outer layer of the polyethylene plastic film on the plastic woven cloth through the bonding layer, extruding and forming by using a compound roller, rolling and making a bag.
The thickness of the plastic woven cloth is as follows: 50-70 μm, the thickness of the adhesive layer is: 10-15 μm; the thickness of the outer layer is as follows: 70-75 μm; the thickness of the secondary outer layer is as follows: 38-42 μm; the thickness of the intermediate layer is as follows: 350-; the thicknesses of the secondary inner layers are as follows: 40-45 μm; the thickness of the inner layer is as follows: 80-90 μm.
Example 1
The bulk bags for buffer solution of the invention are sequentially from outside to inside: plastic woven fabric layer, bonding layer, polyethylene plastic layer.
The plastic woven cloth layer is prepared from the following components in parts by weight: 100 parts of polypropylene, 25 parts of ethylene-propylene random copolymer, 1 part of maleic anhydride grafted polypropylene, 0.4 part of nano silicon dioxide and 0.2 part of first antioxidant.
The ethylene-propylene random copolymer has better impact resistance than polypropylene and polyethylene.
The first antioxidant is butyl hydroxy toluene.
The adhesive layer is prepared from the following components in parts by weight: 100 parts of polyethylene with the trade name of PX3747 and 38 parts of ethylene-methacrylic acid copolymer.
The polyethylene plastic layer comprises from outside to inside in sequence: an outer layer, a sub-outer layer, a middle layer, a sub-inner layer and an inner layer.
The outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 12 parts of ethylene-vinyl acetate copolymer, 2 parts of calcium stearate and 0.2 part of second antioxidant.
The secondary outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 28 parts of ethylene-methacrylic acid copolymer and 10 parts of epoxy resin.
The middle layer is prepared from the following components in parts by weight: 100 parts of linear low-density polyethylene, 18 parts of high-density polyethylene, 12 parts of ethylene-vinyl alcohol copolymer, 0.2 part of second antioxidant and 0.2 part of lubricant.
The high density polyethylene has a molecular weight of 60 ten thousand.
The second antioxidant is a mixture of an antioxidant 1010 and an antioxidant 164 in equal weight ratio. The lubricant is oleamide.
The secondary inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 18 parts of ethylene-methacrylic acid copolymer and 18 parts of epoxy resin.
The inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 55 parts of linear low-density polyethylene and 25 parts of metallocene polyethylene.
The low-density polyethylene is prepared from the following components in parts by weight: 10 parts of low-density polyethylene with the brand number FB3003, 1.5 parts of low-density polyethylene with the brand number R300 and 4 parts of low-density polyethylene with the brand number 15303.
The linear low-density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042, 7 parts of linear low-density polyethylene with the trade name of SP1520 and 3 parts of linear low-density polyethylene with the trade name of SP 2020.
The metallocene polyethylene is prepared from the following components in parts by weight: 4 parts of metallocene polyethylene with the trademark of 1018MF, 2 parts of metallocene polyethylene with the trademark of 2010HE, 3 parts of metallocene polyethylene with the trademark of 2703MC and 5 parts of metallocene polyethylene with the trademark of EF601 AA.
The preparation method of the bulk bag for the buffer solution comprises the following steps:
(1) preparing plastic woven cloth: uniformly stirring and mixing raw materials of the plastic woven cloth layer, extruding the mixture into a film, cooling, cutting and stretching the film to form flat wires, cooling the flat wires, weaving the flat wires into a barrel material in a warp-weft staggered manner, and rolling the barrel material into the plastic woven cloth;
(2) preparing a polyethylene plastic layer: the method comprises the following steps of firstly, uniformly mixing the components of the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer according to the formula amount, and then co-extruding the mixture into a layer by five-layer co-extrusion film blowing equipment, wherein the five layers are as follows from outside to inside: cooling the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer, then performing static electricity removal treatment, and finally winding the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer into a polyethylene plastic film;
the parameters during film blowing are as follows: the barrel temperature was 145 ℃, the die temperature was 180 ℃, and the blow-up ratio was 2.5.
(3) Preparation of bulk bags for buffer: and (3) heating the raw materials of the bonding layer, extruding and coating the raw materials of the bonding layer on the plastic woven cloth prepared in the step (1) and the polyethylene plastic film prepared in the step (2), then bonding the outer layer of the polyethylene plastic film on the plastic woven cloth through the bonding layer, extruding and forming by using a compound roller, rolling and making a bag.
The thickness of the plastic woven cloth is as follows: 60 μm, the thickness of the adhesive layer is: 12 μm; the thickness of the outer layer is as follows: 72 μm; the thickness of the secondary outer layer is as follows: 40 μm; the thickness of the intermediate layer is as follows: 370 μm; the thicknesses of the secondary inner layers are as follows: 42 μm; the thickness of the inner layer is as follows: 85 μm.
Example 2
The bulk bags for buffer solution of the invention are sequentially from outside to inside: plastic woven fabric layer, bonding layer, polyethylene plastic layer.
The plastic woven cloth layer is prepared from the following components in parts by weight: 100 parts of polypropylene, 20 parts of ethylene-propylene random copolymer, 1.2 parts of maleic anhydride grafted polypropylene, 0.3 part of nano silicon dioxide and 0.3 part of first antioxidant.
The ethylene-propylene random copolymer has better impact resistance than polypropylene and polyethylene.
The first antioxidant is butyl hydroxy toluene.
The adhesive layer is prepared from the following components in parts by weight: 100 parts of polyethylene with the trade name of PX3747 and 35 parts of ethylene-methacrylic acid copolymer.
The polyethylene plastic layer comprises from outside to inside in sequence: an outer layer, a sub-outer layer, a middle layer, a sub-inner layer and an inner layer.
The outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 10 parts of ethylene-vinyl acetate copolymer, 1 part of calcium stearate and 0.3 part of second antioxidant.
The secondary outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 25 parts of ethylene-methacrylic acid copolymer and 12 parts of epoxy resin.
The middle layer is prepared from the following components in parts by weight: 100 parts of linear low-density polyethylene, 15 parts of high-density polyethylene, 10 parts of ethylene-vinyl alcohol copolymer, 0.3 part of second antioxidant and 0.1 part of lubricant.
The high density polyethylene has a molecular weight of 50 ten thousand.
The second antioxidant is antioxidant 1010.
The lubricant is oleamide.
The secondary inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 15 parts of ethylene-methacrylic acid copolymer and 15 parts of epoxy resin.
The inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 50 parts of linear low-density polyethylene and 30 parts of metallocene polyethylene.
The low-density polyethylene is prepared from the following components in parts by weight: 10 parts of low-density polyethylene with the trademark FB3003, 1 part of low-density polyethylene with the trademark R300 and 5 parts of low-density polyethylene with the trademark 15303.
The linear low-density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042, 8 parts of linear low-density polyethylene with the trade name of SP1520 and 2 parts of linear low-density polyethylene with the trade name of SP 2020.
The metallocene polyethylene is prepared from the following components in parts by weight: 5 parts of metallocene polyethylene with the trademark of 1018MF, 1 part of metallocene polyethylene with the trademark of 2010HE, 2 parts of metallocene polyethylene with the trademark of 2703MC and 6 parts of metallocene polyethylene with the trademark of EF601 AA.
The preparation method of the bulk bag for the buffer solution comprises the following steps:
(1) preparing plastic woven cloth: uniformly stirring and mixing raw materials of the plastic woven cloth layer, extruding the mixture into a film, cooling, cutting and stretching the film to form flat wires, cooling the flat wires, weaving the flat wires into a barrel material in a warp-weft staggered manner, and rolling the barrel material into the plastic woven cloth;
(2) preparing a polyethylene plastic layer: the method comprises the following steps of firstly, uniformly mixing the components of the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer according to the formula amount, and then co-extruding the mixture into a layer by five-layer co-extrusion film blowing equipment, wherein the five layers are as follows from outside to inside: cooling the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer, then performing static electricity removal treatment, and finally winding the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer into a polyethylene plastic film;
the parameters during film blowing are as follows: the barrel temperature was 130 ℃, the die temperature was 160 ℃, and the blow-up ratio was 2.2.
(3) Preparation of bulk bags for buffer: and (3) heating the raw materials of the bonding layer, extruding and coating the raw materials of the bonding layer on the plastic woven cloth prepared in the step (1) and the polyethylene plastic film prepared in the step (2), then bonding the outer layer of the polyethylene plastic film on the plastic woven cloth through the bonding layer, extruding and forming by using a compound roller, rolling and making a bag.
The thickness of the plastic woven cloth is as follows: 50 μm, the thickness of the adhesive layer is: 15 μm; the thickness of the outer layer is as follows: 70 μm; the thickness of the secondary outer layer is as follows: 42 μm; the thickness of the intermediate layer is as follows: 350 μm; the thicknesses of the secondary inner layers are as follows: 40 μm; the thickness of the inner layer is as follows: 80 μm.
Example 3
The bulk bags for buffer solution of the invention are sequentially from outside to inside: plastic woven fabric layer, bonding layer, polyethylene plastic layer.
The plastic woven cloth layer is prepared from the following components in parts by weight: 100 parts of polypropylene, 30 parts of ethylene-propylene random copolymer, 0.7 part of maleic anhydride grafted polypropylene, 0.5 part of nano silicon dioxide and 0.1 part of first antioxidant.
The ethylene-propylene random copolymer has better impact resistance than polypropylene and polyethylene.
The first antioxidant is butyl hydroxy toluene.
The adhesive layer is prepared from the following components in parts by weight: 100 parts of polyethylene with the trade name of PX3747 and 40 parts of ethylene-methacrylic acid copolymer.
The polyethylene plastic layer comprises from outside to inside in sequence: an outer layer, a sub-outer layer, a middle layer, a sub-inner layer and an inner layer.
The outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 10-15 parts of ethylene and vinyl acetate copolymer, 3 parts of calcium stearate and 0.1 part of second antioxidant.
The secondary outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 30 parts of ethylene-methacrylic acid copolymer and 8 parts of epoxy resin.
The middle layer is prepared from the following components in parts by weight: 100 parts of linear low-density polyethylene, 20 parts of high-density polyethylene, 15 parts of ethylene-vinyl alcohol copolymer, 0.1 part of second antioxidant and 0.3 part of lubricant.
The high density polyethylene has a molecular weight of 80 ten thousand.
The second antioxidant is antioxidant 164.
The lubricant is oleamide.
The secondary inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 20 parts of ethylene-methacrylic acid copolymer and 20 parts of epoxy resin.
The inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 60 parts of linear low-density polyethylene and 20 parts of metallocene polyethylene.
The low-density polyethylene is prepared from the following components in parts by weight: 10 parts of low-density polyethylene with the brand number FB3003, 2 parts of low-density polyethylene with the brand number R300 and 3 parts of low-density polyethylene with the brand number 15303.
The linear low-density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042, 6 parts of linear low-density polyethylene with the trade name of SP1520 and 4 parts of linear low-density polyethylene with the trade name of SP 2020.
The metallocene polyethylene is prepared from the following components in parts by weight: 3 parts of metallocene polyethylene with the trademark of 1018MF, 3 parts of metallocene polyethylene with the trademark of 2010HE, 4 parts of metallocene polyethylene with the trademark of 2703MC and 4 parts of metallocene polyethylene with the trademark of EF601 AA.
The preparation method of the bulk bag for the buffer solution comprises the following steps:
(1) preparing plastic woven cloth: uniformly stirring and mixing raw materials of the plastic woven cloth layer, extruding the mixture into a film, cooling, cutting and stretching the film to form flat wires, cooling the flat wires, weaving the flat wires into a barrel material in a warp-weft staggered manner, and rolling the barrel material into the plastic woven cloth;
(2) preparing a polyethylene plastic layer: the method comprises the following steps of firstly, uniformly mixing the components of the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer according to the formula amount, and then co-extruding the mixture into a layer by five-layer co-extrusion film blowing equipment, wherein the five layers are as follows from outside to inside: cooling the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer, then performing static electricity removal treatment, and finally winding the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer into a polyethylene plastic film;
the parameters during film blowing are as follows: the barrel temperature was 160 ℃, the die temperature was 200 ℃ and the blow-up ratio was 2.8.
(3) Preparation of bulk bags for buffer: and (3) heating the raw materials of the bonding layer, extruding and coating the raw materials of the bonding layer on the plastic woven cloth prepared in the step (1) and the polyethylene plastic film prepared in the step (2), then bonding the outer layer of the polyethylene plastic film on the plastic woven cloth through the bonding layer, extruding and forming by using a compound roller, rolling and making a bag.
The thickness of the plastic woven cloth is as follows: 70 μm, the thickness of the adhesive layer is: 10 mu m; the thickness of the outer layer is as follows: 75 μm; the thickness of the secondary outer layer is as follows: 38 μm; the thickness of the intermediate layer is as follows: 380 μm; the thicknesses of the secondary inner layers are as follows: 45 μm; the thickness of the inner layer is as follows: and 90 μm.
Comparative example 1
This comparative example differs from example 1 in that:
the low density polyethylene is low density polyethylene with the designation FB 3003.
The linear low density polyethylene is a linear low density polyethylene having a trade designation of DFDA-7042.
The metallocene polyethylene is a metallocene polyethylene having a designation of 1018 MF.
The rest of the formulation and preparation method are the same as in example 1.
Comparative example 2
This comparative example differs from example 1 in that:
the low density polyethylene is a low density polyethylene having a designation of R300.
The linear low density polyethylene is a linear low density polyethylene having the designation SP 1520.
The metallocene polyethylene is a metallocene polyethylene having a trademark of 2010 HE.
The rest of the formulation and preparation method are the same as in example 1.
Comparative example 3
This comparative example differs from example 1 in that:
the low density polyethylene is a 15303 grade low density polyethylene.
The linear low density polyethylene is a linear low density polyethylene having a designation SP 2020.
The metallocene polyethylene is a 2703MC brand metallocene polyethylene.
The rest of the formulation and preparation method are the same as in example 1.
Comparative example 4
This comparative example differs from example 1 in that:
the low density polyethylene is a DFDA-7042 brand low density polyethylene.
The linear low density polyethylene is a linear low density polyethylene having a designation SP 2020.
The metallocene polyethylene is a metallocene polyethylene having a trade designation EF601 AA.
The rest of the formulation and preparation method are the same as in example 1.
Comparative example 5
This comparative example differs from example 1 in that:
the low-density polyethylene is prepared from the following components in parts by weight: 10 parts of low-density polyethylene with the trademark FB3003 and 4 parts of low-density polyethylene with the trademark R300.
The linear low-density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042 and 3 parts of linear low-density polyethylene with the trade name of SP 2020.
The metallocene polyethylene is prepared from the following components in parts by weight: 4 parts of metallocene polyethylene with the mark of 1018MF and 2 parts of metallocene polyethylene with the mark of 2010 HE.
The rest of the formulation and preparation method are the same as in example 1.
Comparative example 6
This comparative example differs from example 1 in that:
the low-density polyethylene is prepared from the following components in parts by weight: 1.5 parts of low-density polyethylene with the trade name of R300 and 4 parts of low-density polyethylene with the trade name of 15303.
The linear low-density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042 and 7 parts of linear low-density polyethylene with the trade name of SP 1520.
The metallocene polyethylene is prepared from the following components in parts by weight: 2 parts of metallocene polyethylene with the trademark of 2010HE, 3 parts of metallocene polyethylene with the trademark of 2703MC and 5 parts of metallocene polyethylene with the trademark of EF601 AA.
The rest of the formulation and preparation method are the same as in example 1.
EXAMPLE 4 Performance test of bulk bags for buffer solution of the present invention
First, test method
1. Tensile load
The test was carried out as specified in GB/T1040.3, using a strip sample with a clamp spacing of 150mm, a width of 50mm and a test speed of 200 mm/min.
2. Acid resistance
The sample was placed in 5% H2SO4In the solution, the surface change was observed.
3. Alkali resistance
The sample was placed in a 5% NaOH solution, and the change in the surface was observed.
Second, checking the rules
The product is accepted by taking a batch as a unit. 3 bulk bags of buffer were randomly sampled for each batch.
Third, test results
The results of measuring the physical properties of the bulk bags for buffer are shown in Table 1.
TABLE 1
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A flexible container for buffer solution is characterized in that: the flexible freight bag for buffer solution is as follows from outside to inside in proper order: plastic woven fabric layer, adhesive layer, polyethylene plastic layer;
the plastic woven cloth layer is prepared from the following components in parts by weight: 100 parts of polypropylene, 20-30 parts of ethylene-propylene random copolymer, 0.7-1.2 parts of maleic anhydride grafted polypropylene, 0.3-0.5 part of nano silicon dioxide and 0.1-0.3 part of first antioxidant;
the adhesive layer is prepared from the following components in parts by weight: 100 parts of polyethylene with the mark of PX3747 and 35-40 parts of ethylene-methacrylic acid copolymer;
the polyethylene plastic layer consists of 5 layers which are sequentially as follows: an outer layer, a secondary outer layer, a middle layer, a secondary inner layer and an inner layer;
the outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 10-15 parts of ethylene-vinyl acetate copolymer, 1-3 parts of calcium stearate and 0.1-0.3 part of second antioxidant;
the secondary outer layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 25-30 parts of ethylene-methacrylic acid copolymer and 8-12 parts of epoxy resin;
the middle layer is prepared from the following components in parts by weight: 100 parts of linear low-density polyethylene, 15-20 parts of high-density polyethylene, 10-15 parts of ethylene-vinyl alcohol copolymer, 0.1-0.3 part of second antioxidant and 0.1-0.3 part of lubricant;
the secondary inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 15-20 parts of ethylene-methacrylic acid copolymer and 15-20 parts of epoxy resin;
the inner layer is prepared from the following components in parts by weight: 100 parts of low-density polyethylene, 50-60 parts of linear low-density polyethylene and 20-30 parts of metallocene polyethylene.
2. A bulk bag for buffers according to claim 1, characterized in that: the low-density polyethylene is prepared from the following components in parts by weight: 10 parts of low-density polyethylene with the brand number FB3003, 1-2 parts of low-density polyethylene with the brand number R300 and 3-5 parts of low-density polyethylene with the brand number 15303.
3. A bulk bag for buffers according to claim 1, characterized in that: the linear low-density polyethylene is prepared from the following components in parts by weight: 10 parts of linear low-density polyethylene with the trade name of DFDA-7042, 6-8 parts of linear low-density polyethylene with the trade name of SP1520 and 2-4 parts of linear low-density polyethylene with the trade name of SP 2020.
4. A bulk bag for buffers according to claim 1, characterized in that: the metallocene polyethylene is prepared from the following components in parts by weight: 3-5 parts of metallocene polyethylene with the trademark of 1018MF, 1-3 parts of metallocene polyethylene with the trademark of 2010HE, 2-4 parts of metallocene polyethylene with the trademark of 2703MC and 4-6 parts of metallocene polyethylene with the trademark of EF601 AA.
5. A bulk bag for buffers according to claim 1, characterized in that: the first antioxidant is butyl hydroxy toluene; and/or
The second antioxidant is antioxidant 1010 and/or antioxidant 164.
6. A bulk bag for buffers according to claim 1, characterized in that: the high density polyethylene has a molecular weight of 50 to 80 ten thousand.
7. A bulk bag for buffers according to claim 1, characterized in that: the lubricant is oleamide.
8. A bulk bag for buffers according to claim 1, characterized in that: the thickness of the plastic woven cloth is as follows: 50-70 μm, the thickness of the adhesive layer is: 10-15 μm; the thickness of the outer layer is as follows: 70-75 μm; the thickness of the secondary outer layer is as follows: 38-42 μm; the thickness of the intermediate layer is as follows: 350-; the thicknesses of the secondary inner layers are as follows: 40-45 μm; the thickness of the inner layer is as follows: 80-90 μm.
9. The method for producing a bulk bag for buffers according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
(1) preparing plastic woven cloth: uniformly stirring and mixing raw materials of the plastic woven cloth layer, extruding the mixture into a film, cooling, cutting and stretching the film to form flat wires, cooling the flat wires, weaving the flat wires into a barrel material in a warp-weft staggered manner, and rolling the barrel material into the plastic woven cloth;
(2) preparing a polyethylene plastic layer: the method comprises the following steps of firstly, uniformly mixing the components of the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer according to the formula amount, and then co-extruding the mixture into a layer by five-layer co-extrusion film blowing equipment, wherein the five layers are as follows from outside to inside: cooling the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer, then performing static electricity removal treatment, and finally winding the outer layer, the secondary outer layer, the middle layer, the secondary inner layer and the inner layer into a polyethylene plastic film;
(3) preparation of bulk bags for buffer: and (3) heating the raw materials of the bonding layer, extruding and coating the raw materials of the bonding layer on the plastic woven cloth prepared in the step (1) and the polyethylene plastic film prepared in the step (2), then bonding the outer layer of the polyethylene plastic film on the plastic woven cloth through the bonding layer, extruding and forming by using a compound roller, rolling and making a bag.
10. The method for producing a bulk bag for buffers according to claim 9, characterized in that: the parameters during film blowing are as follows: the temperature of the screw cylinder is 130-160 ℃, the temperature of the die head is 160-200 ℃, and the blow-up ratio is 2.2-2.8.
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| CN1084452A (en) * | 1992-09-18 | 1994-03-30 | 格雷斯公司 | Moisture-proofing film |
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