CN110789853A - Hot concatenation type flexible container - Google Patents
Hot concatenation type flexible container Download PDFInfo
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- CN110789853A CN110789853A CN201911064383.8A CN201911064383A CN110789853A CN 110789853 A CN110789853 A CN 110789853A CN 201911064383 A CN201911064383 A CN 201911064383A CN 110789853 A CN110789853 A CN 110789853A
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- Prior art keywords
- flexible
- flexible container
- bag
- flexible freight
- container body
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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
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1618—Flexible intermediate bulk containers [FIBC] double-walled or with linings
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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
- B65D88/1612—Flexible intermediate bulk containers [FIBC]
- B65D88/1675—Lifting fittings
- B65D88/1681—Flexible, e.g. loops, or reinforcements therefor
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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
- B65D88/54—Large containers characterised by means facilitating filling or emptying
-
- 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
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06H—MARKING, INSPECTING, SEAMING OR SEVERING TEXTILE MATERIALS
- D06H7/00—Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0006—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using woven fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D06N3/045—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds with polyolefin or polystyrene (co-)polymers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Bag Frames (AREA)
- Wrappers (AREA)
Abstract
The invention relates to a flexible freight bag, in particular to a thermal splicing flexible freight bag. The utility model provides a hot concatenation type flexible container, it includes flexible container body 1 in the middle of the flexible container body 1 top and bottom intermediate position are equipped with feed inlet 2 and discharge gate 3 respectively four corners in flexible container body 1 upper portion all are equipped with strenghthened type suspender 4 the triangle intersection of flexible container body 1 all is equipped with sealed triangle module 5, flexible container body 1's bag body includes waterproof layer 6, base cloth layer 7 and waterproof layer 6 from inside to outside respectively, waterproof layer 6 is the complex film of PE and PP. The flexible freight bag provided by the invention adopts a heat seal splicing process, greatly improves the automation degree of flexible freight bag production, has good sealing waterproof and moistureproof performances, does not need to increase a lining bag, reduces the whole weight of the packaging bag and saves raw materials.
Description
Technical Field
The invention relates to the technical field of flexible freight bags, in particular to a thermal splicing flexible freight bag.
Background
Along with the transformation and upgrading of the industry, new requirements such as more centralization, high efficiency, convenience and the like are provided for the packaging of products, and the flexible freight bag has the advantages of good filling performance and convenience in quick loading and unloading, so that the flexible freight bag is more and more favored by the market. Heretofore, bulk bags have become one of the major tools for industrial bulk cargo, powder packaging, and transportation in the world, and are widely used in various fields such as chemical industry, mineral industry, agriculture, building materials, food and medicine, and the like.
However, unlike high-tech products such as electronics and communications, the current flexible freight bags are still labor-intensive products, require a large number of skilled operators, and are labor-intensive and labor-costly. With the upgrading of industry and the change of labor force, such workers are more difficult to attract and stabilize personnel, so that the problem of production automation needs to be solved.
After a lot of research and trial, although certain improvement is made in the aspect of production process, the process of production automation is also promoted to a certain extent. However, the process is not perfect enough, the raw materials are not selected reasonably, and the like, so that the commercial flexible freight bags can not meet the requirements of cleanliness, forming effect, production efficiency, bag body strength, ultraviolet resistance and color uniformity.
Disclosure of Invention
In order to solve the problems, the invention provides a thermally spliced flexible freight bag, which comprises a flexible freight bag body 1, wherein a feed inlet 2 and a discharge outlet 3 are respectively arranged in the middle of the top and the middle of the bottom of the flexible freight bag body 1, reinforced hanging strips 4 are respectively arranged at four corners of the upper part of the flexible freight bag body 1, sealing triangular modules 5 are respectively arranged at triangular junctions of the flexible freight bag body 1, the bag body of the flexible freight bag body 1 respectively comprises a waterproof layer 6, a base cloth layer 7 and a waterproof layer 6 from inside to outside, and the waterproof layer 6 is a composite film of PE and PP.
As a preferred technical scheme of the invention, the flexible freight bag body 1 is formed by heat sealing and splicing, and the process conditions of the heat sealing and splicing are as follows: the temperature is 280-320 ℃, the weight of the pinch roller is 40-60 kg, and the walking speed is 15-25 m/min.
As a preferable technical scheme of the invention, the weight ratio of the raw materials PE and PP prepared in the PE and PP composite film is 1: (3-5).
As a preferable technical scheme, the raw materials for preparing the PE and PP composite film further comprise 2.1-3 wt% of an antistatic agent and 3-5 wt% of an ultraviolet resistant agent.
In a preferred embodiment of the present invention, the antistatic agent is at least one selected from the group consisting of a cationic antistatic agent, an anionic antistatic agent, a nonionic antistatic agent, and an amphoteric antistatic agent.
As a preferred technical scheme of the invention, the antistatic agent is a cationic antistatic agent and an amphoteric antistatic agent.
In a preferred embodiment of the present invention, the anti-uv agent is an inorganic anti-uv agent and/or an organic anti-uv agent.
As a preferred technical solution of the present invention, the gram weight ratio of the waterproof layer 6 to the base fabric layer 7 is 1: (5-7).
As a preferable technical scheme of the invention, a reinforcing module 8 is further arranged at the joint of the flexible freight bag body 1 and the reinforcing sling 4.
The invention provides a preparation method of a hot splicing type container bag, which at least comprises the following steps:
1) weaving: the base cloth is woven by adopting warp and weft, and the warp-weft ratio of the base cloth is 1: (0.7 to 1.2);
2) coating: coating the inner and outer surfaces of the base cloth prepared in the step 1) with a PE and PP composite film by adopting a double-sided film coating process to obtain a finished cloth;
3) molding: cutting the finished fabric obtained in the step 2), and performing heat seal, sealing, splicing and molding to obtain the fabric.
Has the advantages that: according to the hot splicing type flexible freight bag prepared by the invention, by adopting special processes and components, on one hand, the inherent problems of high labor intensity and high labor cost in the flexible freight bag production process are solved, and the automation degree of production is greatly improved; on the other hand, through the mutual cooperation of various components, the cleanliness of the flexible freight bag is improved, the composite film of PE and PP has certain surface energy, the agglomeration and the extension of surface active molecules are effectively regulated and controlled, the surface of the film has proper roughness, and the forming effect of the flexible freight bag is improved. In addition, the invention also improves the weaving efficiency of the base cloth, has the advantage of high production speed, has certain expansion rate and rebound rate in the stretching and stress processes, and enables splicing to be more compact through high-temperature melting and curing reaction, thereby improving the strength of the bag body. The flexible freight bag provided by the invention also has good ultraviolet resistance, is not easy to age, and disperses the repulsive force effect of the additional auxiliary agent and the polymer matrix material, so that the compatibility of the system is improved, the color uniformity of the bag body is further improved, and the whole body is more attractive. In addition, because of all there is waterproof and moistureproof coating inside and outside the substrate, the concatenation department all adopts the sealed concatenation of heat seal, adopts sealed triangle module at triangle intersection, can reach the complete sealed waterproof and moistureproof performance of whole bag, needn't increase interior lining bag, alleviates the whole weight of wrapping bag, and material saving is equipped with the reinforcing module at the suspender position, reduces the tearing stress of suspender, ensures the fastness of suspender.
Drawings
FIG. 1 is a schematic external view of a bulk bag according to example 1.
Fig. 2 is a schematic composition diagram of the body of the bulk bag in example 1.
Description of the symbols: 1-bulk bag body; 2-a feed inlet; 3-discharging port; 4-reinforced type hanging strip; 5-sealing the triangular module; 6-waterproof layer; 7-a base fabric layer; 8-enhancement module
Detailed Description
The technical features of the technical solutions provided by the present invention are further clearly and completely described below with reference to the specific embodiments, and the scope of protection is not limited thereto. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, the present specification, including definitions, will control.
The words "preferred," "more preferred," "most preferred," and the like in this disclosure mean embodiments of the invention that may, in some instances, provide some benefit. However, other embodiments may be preferred, under the same or other circumstances. Furthermore, the recitation of one or more preferred embodiments does not imply that other embodiments are not useful, nor is it intended to exclude other embodiments from the scope of the invention.
The singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. "optional" or "any" means that the subsequently described event or events may or may not occur, and that the description includes instances where the event occurs and instances where it does not.
In order to solve the problems, the invention provides a thermally spliced flexible freight bag, which comprises a flexible freight bag body 1, wherein a feed inlet 2 and a discharge outlet 3 are respectively arranged in the middle of the top and the middle of the bottom of the flexible freight bag body 1, reinforced hanging strips 4 are respectively arranged at four corners of the upper part of the flexible freight bag body 1, sealing triangular modules 5 are respectively arranged at triangular junctions of the flexible freight bag body 1, the bag body of the flexible freight bag body 1 respectively comprises a waterproof layer 6, a base cloth layer 7 and a waterproof layer 6 from inside to outside, and the waterproof layer 6 is a composite film of PE and PP.
The top in the context of the present invention refers to the uppermost surface of the bulk bag, i.e. the surface seen from above, as opposed to the bottom.
The upper part of the invention refers to the upper half part of the bag body of the flexible freight bag.
The triangular junctions described in the invention refer to 8 triangular junctions at the junction of every three adjacent surface vertexes of the bulk bag.
Flexible container body 1
The Flexible Intermediate Bulk Container (FIBC), also called Flexible Bulk bag, ton bag, space bag, etc. is one kind of Container unit, and may be transported in Container unit with crane or fork truck. The flexible container is widely used for transporting and packaging powdery, granular and blocky articles such as food, grain, medicine, chemical industry, mineral products and the like, and is generally used as a packaging product for transportation and storage in developed countries.
The invention has no special limitation on the size of the bulk bag body, can be designed according to the characteristics of products, and can also be customized according to the special requirements of end users.
As examples of the dimensions of the body of the bulk bag, the lengths can be listed as: 900cm, 910cm, 920cm, 930cm, 940cm, 950cm, 960cm, 970cm, 980cm, 990cm, 1000 cm; the widths can be listed as: 900cm, 910cm, 920cm, 930cm, 940cm, 950cm, 960cm, 970cm, 980cm, 990cm, 1000 cm; highly enumerated are: 1000cm, 1050cm, 1100cm, 1150cm, 1200cm, 1250cm, 1300cm, 1350cm, 1400cm, 1450cm, 1500 cm.
Heat seal splicing
The heat seal splicing, which is called heat splicing for short, is characterized in that a heat sealing device is utilized to heat the sealing part of a plastic film to be in a viscous flow state, two layers of films are fused into a whole by means of certain pressure, and certain strength and sealing performance are kept after cooling, so that a product can bear certain external force in the processes of packaging, transportation, storage and sale, and the phenomena of cracking, leakage and the like of the product are avoided, and the purpose of protecting the product is achieved.
In a preferred embodiment, the bulk container 1 of the present invention is made by heat sealing and splicing, and the process conditions of the heat sealing and splicing are as follows: the temperature is 280-320 ℃, the weight of the pinch roller is 40-60 kg, and the walking speed is 15-25 m/min.
In a more preferred embodiment, the process conditions for the heat seal splicing of the present invention are as follows: the temperature is 300 ℃, the weight of the pinch roller is 50kg, and the running speed is 20 m/min.
The pressing wheel is a component in the heat sealing device and is used for providing certain pressure.
The walking speed refers to the speed of the pinch roller.
Feed inlet 2
The feed inlet refers to a part for loading materials on the flexible freight bag.
The shape of the feed inlet is not particularly limited, and the feed inlet can be cuboid, square, cylindrical or irregular, and can be customized according to the special requirements of end users.
In a preferred embodiment, the feed gap according to the invention is cylindrical.
The size of the feed inlet is not particularly limited, and the feed inlet can be designed according to the characteristics of products and can also be customized according to the special requirements of end users.
When the feed inlet is cylindrical, the diameter of the cylinder may be: 50cm, 55cm, 60cm, 65cm, 70cm, 75cm, 80 cm; the height of the cylinder may be: 60cm, 65cm, 70cm, 75cm, 80cm, 85cm, 90cm, 95cm, 100 cm.
The feeding hole is in an open state before charging.
The discharge port refers to a discharging part of the flexible freight bag.
The shape of the discharge hole is not particularly limited, and the discharge hole can be cuboid, square, cylindrical or irregular, and can also be customized according to the special requirements of the end user.
In a preferred embodiment, the discharge hole of the present invention has a cylindrical shape.
The size of the discharge port is not particularly limited, and the discharge port can be designed according to the characteristics of products and can also be customized according to the special requirements of end users.
When the discharge port is cylindrical, the diameter of the cylinder may be: 40cm, 45cm, 50cm, 55cm, 60cm, 65cm, 70 cm; the height of the cylinder may be: 30cm, 35cm, 40cm, 45cm, 50cm, 55cm, 60cm, 65cm, 70 cm.
The discharge port is in a sealed state before charging.
In a preferred embodiment, the sealing of the discharge hole is performed by heat sealing with metallocene polyethylene plastic film.
The metallocene polyethylene is a novel thermoplastic, is produced by using Metallocene (MAO) as a polymerization catalyst, and has unique and excellent properties.
Reinforced sling 4
The invention relates to a reinforced sling, in particular to a sling device which is arranged on a flexible freight bag and used for lifting a forklift and a crane.
The invention has no special limitation on the style and size of the reinforced sling, and can be designed according to the characteristics of products and customized according to the special requirements of end users.
As examples of strap widths, there may be mentioned: 60cm, 65cm, 70cm, 75cm, 80cm, 85cm, 90 cm.
In a preferred embodiment, the height of the overlapping portion of the reinforced hanging strip 4 and the bag main body 1 is 20 to 30 cm.
In a more preferred embodiment, the height of the overlapping portion of the reinforced sling 4 and the bag body 1 of the present invention may be: 20cm, 21cm, 22cm, 23cm, 24cm, 25cm, 26cm, 27cm, 28cm, 29cm, 30 cm.
Sealing triangular module 5
The sealing triangular module is a component connected at the intersection point of the vertexes of every three adjacent surfaces of the bulk bag (namely, the triangular intersection), and is used for improving the sealing performance of the bulk bag.
The number of the sealing triangular modules 5 is 8.
In a preferred embodiment, the sealing triangular module 5 is connected with the bulk bag body 1 through hot melt adhesive.
The hot melt adhesive is not particularly limited in the present invention, as long as the sealing triangular module 5 can be connected with the bulk bag body 1 without affecting the purpose of the present invention, and the following can be listed: ethylene and its copolymers (EVA, EEA, EAA, EVAL), polyurethanes (pressure-sensitive adhesives and PUR water-based adhesives), Polyamides (PA), Polyesters (PES), APAO, polyolefins (PE, PP), styrene (SBS, SIS).
In a preferred embodiment, the hot melt adhesive of the present invention is an EVA hot melt adhesive.
The EVA hot melt adhesive is also called ethylene/vinyl acetate copolymer, and is a plastic material consisting of ethylene (E) and Vinyl Acetate (VA).
The waterproof layer is a PE and PP composite film coated on the inner surface and the outer surface of the base cloth layer by adopting a double-sided film coating process, so that waterproof and moistureproof performances are endowed to the flexible freight bag.
In a preferred embodiment, the weight ratio of the raw materials PE and PP prepared in the composite film of PE and PP of the present invention is 1: (3-5).
In a more preferred embodiment, the weight ratio of the raw materials PE and PP prepared in the composite film of PE and PP according to the present invention is 1: 4.
in a preferred embodiment, the raw material for preparing the PE and PP composite film further comprises 2.1-3 wt% of an antistatic agent and 3-5 wt% of an anti-ultraviolet agent.
Antistatic agent
The antistatic agent of the present invention refers to an additive which is added into plastics or coated on the surface of a molded product to achieve the purpose of reducing static accumulation.
In a preferred embodiment, the antistatic agent according to the present invention is selected from at least one of cationic antistatic agents, anionic antistatic agents, nonionic antistatic agents, amphoteric antistatic agents.
In a preferred embodiment, the antistatic agents of the present invention are cationic antistatic agents and amphoteric antistatic agents.
As examples of cationic antistatic agents, mention may be made of: behenyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, dipalmitoyl ethyl dimethyl ammonium chloride, distearyl ethyl dimethyl ammonium chloride, ethyl dipalmitate hydroxyethyl methyl ammonium methyl sulfate, ethyl distearate hydroxyethyl methyl ammonium methyl sulfate.
As examples of the amphoteric antistatic agent, there may be mentioned: sodium laurylaminopropionate, sodium lauryldimethylbetaine, ammonium lauryldihydroxyethyl betaine, lauryl dimethylbetaine, ammonium cocoyl glycinate, N-dimethyldodecyl betaine, octadecyl dihydroxyethyl amine oxide, tetradecyldihydroxyethyl amine oxide, octadecyl amidopropyl amine oxide, cocoamidopropyl amine oxide.
In a more preferred embodiment, the antistatic agents of the present invention are cetyltrimethylammonium chloride and dodecyldimethylbetaine.
In a more preferred embodiment, the weight ratio of the hexadecyl trimethyl ammonium chloride to the dodecyl dimethyl betaine is (2.5-3.5): 1.
in a most preferred embodiment, the weight ratio of cetyltrimethylammonium chloride and dodecyldimethyl betaine according to the invention is 3: 1.
because the inner layer and the outer layer of the flexible freight bag are both coated with the PE/PP composite film, and static charges caused by mutual friction cannot be avoided when the high polymer synthetic material is used; and the carriers of the high polymer can not move, so that the resistivity of the high polymer is high, once the high polymer carries a trace amount of static charges, the static charges can not leak to accumulate in the occasion of the non-electric insulating material, and extremely high static voltage is generated, and even discharge hazard can be generated. On the other hand, due to the existence of static electricity, the polymer synthetic material film is easy to deposit dust and pollute in use and is difficult to clean, and the overall cleanliness of the polymer synthetic material film is influenced. The inventor adopts a method of adding the antistatic agent into the PE/PP composite film, and the antistatic agent is used for adsorbing moisture in the air to form a layer of conductive film on the surface of the PE/PP composite film, so that the conductive film has certain conductivity, and the cleanliness of the bulk bag is improved. However, since the mechanism of action of the antistatic agent is based on a combination of various mechanisms, it can reduce the generation of static charge and increase the smoothness of the film surface, thereby lowering the coefficient of friction. Because the invention adopts the double-sided film coating process, the applicant worries about that the friction coefficient of the bag body at the inner side of the flexible freight bag is too small, so that the bottom of the flexible freight bag is stressed too much in the process of loading, and the forming effect of the flexible freight bag is also reduced.
However, the inventors have unexpectedly found that when the amount ratio of PE and PP is controlled to be 1: (3-5), simultaneously selecting hexadecyl trimethyl ammonium chloride and dodecyl dimethyl betaine as antistatic agents, and controlling the weight ratio of the hexadecyl trimethyl ammonium chloride to the dodecyl dimethyl betaine to be (2.5-3.5): 1, the forming effect of the flexible freight bag can be improved. Probably because the PE and the PP have certain fluidity under the condition of proper proportion; and when the antistatic agent is hexadecyl trimethyl ammonium chloride and dodecyl dimethyl betaine, especially when the weight ratio of the hexadecyl trimethyl ammonium chloride to the dodecyl dimethyl betaine is (2.5-3.5): 1, through the mutual synergistic action of hexadecyl trimethyl ammonium chloride and dodecyl dimethyl betaine, the compatibility with a high polymer material is improved, the composite film can continuously migrate from the inside of the high polymer material to the surface of the high polymer material at a proper migration speed so as to supplement the consumption of the surface, so that a dynamic balance is achieved, the composite film has certain surface energy, the agglomeration and the extension of surface active molecules are effectively regulated and controlled, the surface of a PE/PP composite film has proper roughness, and the forming effect of the flexible freight bag is improved.
Anti-ultraviolet agent
The ultraviolet inhibitor is also called ultraviolet inhibitor, ultraviolet absorbent or ultraviolet screening agent, and is a substance capable of inhibiting and delaying ultraviolet rays from causing photoaging to polymers.
In a preferred embodiment, the uv inhibitor of the present invention is an inorganic uv inhibitor and/or an organic uv inhibitor.
As examples of the inorganic anti-ultraviolet agent, there may be mentioned: zinc oxide, nano zinc oxide, titanium dioxide, nano titanium dioxide, iron oxide, nano iron oxide, talcum powder, titanium dioxide, pottery clay powder and carbon black.
As examples of the organic ultraviolet-resistant agent, there may be mentioned: 2- (2 '-hydroxy-3', 5 '-di-t-butylphenyl) -5-chlorobenzotriazole (trade name: UV-327), 2- (2' -hydroxy-3 '-t-butyl-5' -methylphenyl) -5-chlorobenzotriazole (trade name: UV-326), 2-hydroxy-4-n-octoxybenzophenone (trade name: UV-531), 2- (2H-benzotriazol-2-yl) -4, 6-bis (1-methyl-1-phenylethyl) phenol (trade name: UV-234), 2- (4, 6-diphenyl-1, 3, 5-triazin-2-yl) -5- [ (hexyl) oxy ] -phenol (trade name: UV-1577).
In a more preferred embodiment, the anti-UV agent of the present invention is 2-hydroxy-4-n-octoxybenzophenone and talc.
The talcum powder is magnesium silicate mineral talc, the main component of the talcum powder is hydrous magnesium silicate, and the talcum powder is prepared by crushing, treating with hydrochloric acid, washing with water and drying, and is commonly used as fillers of plastics and paper products, rubber fillers, anti-sticking agents of rubber products, high-grade paint and coating and the like.
In a preferred embodiment, the fineness of the talcum powder is 1000-1500 meshes.
In a more preferred embodiment, the talc according to the invention has a fineness of 1250 mesh.
The talcum powder with the fineness of 1250 meshes can be obtained commercially, for example, the commercially available talcum powder with the fineness of 1250 meshes comprises but is not limited to a product with the model number of TL-611, which is purchased from Tenglong mining company, Inc. in the sea city.
In a preferred embodiment, the weight ratio of the 2-hydroxy-4-n-octoxybenzophenone to the talcum powder is (1-3): 1.
in a more preferred embodiment, the weight ratio of 2-hydroxy-4-n-octoxybenzophenone and talc according to the invention is 2: 1.
in a preferred embodiment, the gram weight of the waterproof layer 6 is 25-35 g/m2。
In a more preferred embodiment, the water barrier layer 6 according to the present invention has a grammage of 30g/m2。
Base cloth layer 7
The base fabric layer of the present invention is a base fabric woven with warp and weft.
In a preferred embodiment, the basis layer 7 of the present invention has a grammage of 150 to 210g/m2。
In a more preferred embodiment, the basis layer 7 of the present invention has a grammage of 180g/m2。
In a preferred embodiment, the gram weight ratio of the waterproof layer 6 to the base fabric layer 7 of the present invention is 1: (5-7).
In a more preferred embodiment, the gram weight ratio of the waterproof layer 6 to the base fabric layer 7 of the present invention is 1: 6.
the applicant has found that when the gram weight ratio of the waterproof layer 6 to the base fabric layer 7 is controlled to be 1: (5-7), the strength of the bulk bag body can be further improved. Probably, when the gram weight ratio of the waterproof layer to the base cloth layer is too low, the hot splicing is not dense enough, and the strength of the bag body is influenced; when the gram weight ratio of the waterproof layer to the base fabric layer is too high, the main base material of the bag body is insufficient, and the strength of the bag body is also low. Only under the condition of specific proportion, the waterproof layer and the base cloth layer are mutually cooperated to increase the strength of the bag body.
In a preferred embodiment, the junction of the bulk bag 1 and the reinforcing straps 4 of the present invention is further provided with a reinforcing module 8.
The number of the enhancement modules 8 is 8.
The reinforcing module of the present invention is a member provided at the joint between the reinforcing strap 4 and the bag body 1 to improve the tensile strength of the strap.
The shape and size of the reinforcing module are not particularly limited, and the reinforcing module can be designed according to the characteristics of a product and can also be customized according to the special requirements of an end user.
As examples of the shape of the reinforcing block, there may be: rectangle, square, ellipse, parallelogram, rhombus, trapezoid.
In a preferred embodiment, the reinforcing module of the invention is rectangular in shape.
When the reinforcing module is rectangular, its length may be: 140mm, 145mm, 150mm, 155mm, 160 mm; its width may be: 40mm, 45mm, 50mm, 55mm, 60 mm.
In a preferred embodiment, the reinforcing module 8 is connected with the bulk bag body 1 through hot melt adhesive.
The hot melt adhesive is not particularly limited in the present invention, as long as the reinforcing module 8 can be connected with the bulk bag body 1 without affecting the purpose of the present invention, and there can be enumerated: ethylene and its copolymers (EVA, EEA, EAA, EVAL), polyurethanes (pressure-sensitive adhesives and PUR water-based adhesives), Polyamides (PA), Polyesters (PES), APAO, polyolefins (PE, PP), styrene (SBS, SIS).
In a preferred embodiment, the hot melt adhesive of the present invention is an EVA hot melt adhesive.
The invention provides a preparation method of a hot splicing type container bag, which at least comprises the following steps:
1) weaving: the base cloth is woven by adopting warp and weft, and the warp-weft ratio of the base cloth is 1: (0.7 to 1.2);
2) coating: coating the inner and outer surfaces of the base cloth prepared in the step 1) with a PE and PP composite film by adopting a double-sided film coating process to obtain a finished cloth;
3) molding: cutting the finished fabric obtained in the step 2), and performing heat seal, sealing, splicing and molding to obtain the fabric.
The present invention has no particular limitation on the method for producing the warp and weft described in step 1), as long as the desired warp and weft can be obtained without affecting the object of the present invention. For example, the warp and weft yarns may be prepared by: extruding the raw materials for preparing warp and weft into film, cutting into strips, and finally stretching and shaping.
In a preferred embodiment, the raw materials for preparing the warp and weft in the step 1) are PE and/or PP.
In a more preferred embodiment, the raw material for preparing the warp and weft in the step 1) is PP.
In a preferred embodiment, the warp-weft ratio of the base fabric in the step 1) is 1: 1.
in a preferred embodiment, the running speed of the double-sided laminating process in the step 2) is 50-70 m/min.
In a more preferred embodiment, the running speed of the double-sided lamination process in the step 2) is 60 m/min.
The prior knitting machine and the warp and weft inserting knitting technology thereof in China can only insert the warp and weft yarns in parallel layer by layer and do not have the function of interweaving the warp and weft yarns, so the knitting efficiency is limited to a certain extent, namely the production efficiency is reduced. In the production process of the flexible freight bag, in order to ensure the use performance of the flexible freight bag, the bag body of the flexible freight bag is often required to meet certain strength requirements, and for woven cloth, the tighter the cloth is, the higher the strength of the woven cloth is generally. And the size of longitude and latitude ratio has important influence to the degree of closeness of knitting, and under the general condition, when latitudinal direction density is higher than warp direction density, can make the knitting inseparabler. However, the efficiency of weft weaving is low compared to warp weaving, i.e., an increase in weft density results in a decrease in weaving efficiency. The inventor has improved through increase longitude and latitude ratio in this application and has woven efficiency, and then has improved the output of production efficiency and product. However, the increase in the warp-to-weft ratio causes the tightness of the knitted fabric to be reduced, and the inventors are concerned about the strength of the bulk bag body to be reduced.
However, the inventors have found that when the warp/weft ratio of the base fabric layer 7 is controlled to be 1: (0.7-1.2) and the gram weight of the waterproof layer 6 is controlled to be 25-35 g/m2The gram weight of the base cloth layer 7 is 150-210 g/m2Meanwhile, when the temperature condition of the heat seal splicing process is controlled to be 280-320 ℃ hot air, the strength of the bag body can be improved. Probably because when the base cloth layer has suitable longitude and latitude ratio and gram weight, make it have certain elasticity and rebound rate in tensile and atress process, and when the gram weight of waterproof layer (PE/PP complex film) is fixed, through high temperature melting and solidification reaction under the condition of appropriate heat-seal temperature, make the concatenation more closely to the intensity of the bag body has been improved.
When the gram weight of the base fabric layer is too high, the expansion rate and the rebound rate of the flexible freight bag can be influenced, and the strength of the bag body is not improved; on the other hand, when the gram weight of the waterproof layer is too high or the heat-sealing temperature is not proper, the curing reaction is incomplete, and the strength of the bag body is reduced.
Because the flexible freight bag is usually used outdoors, the flexible freight bag can be exposed to the sun and rain for a long time, especially along with the damage of an ozone layer, the ultraviolet radiation phenomenon is more and more serious, the aging of the flexible freight bag is easily caused, and then the service performance of the flexible freight bag can be damaged and the service life of the flexible freight bag can be shortened. The inventor adopts a method of adding the ultraviolet resistant agent, and improves the ultraviolet resistant effect by using the inorganic ultraviolet resistant agent and the organic ultraviolet resistant agent in a matching way; and a double-sided film coating process is adopted, and the inner layer and the outer layer of the bag body are coated with ultraviolet-proof layers, so that the ultraviolet-proof capability of the flexible freight bag is further improved. However, 2-hydroxy-4-n-octoxy benzophenone contains benzene rings with large steric hindrance and is difficult to react with a base material, so that the compatibility of a system is poor, and the inventor is concerned about that the color of the bag body is not uniform, thereby affecting the aesthetic property of the flexible freight bag.
However, the inventor unexpectedly found that when the anti-ultraviolet agent is 2-hydroxy-4-n-octoxybenzophenone and talcum powder, and the weight ratio of the two is (1-3): 1, the color uniformity of the bag body can be improved when the running speed of the double-sided film coating process is controlled to be 50-70 m/min. The reason is probably that under the condition of a specific proportion, 2-hydroxy-4-n-octoxy benzophenone and talcum powder are mutually synergistic, so that the steric effect of a system and the intermolecular friction are weakened, and meanwhile, in the double-sided laminating process, the 2-hydroxy-4-n-octoxy benzophenone and the talcum powder can be diffused or transferred into a base material at a proper speed by selecting a proper walking speed condition, so that the repulsive force effect with a high-molecular base material is dispersed, the compatibility of the system is improved, and the color uniformity of the bag body is improved.
The present invention will now be described in detail by way of examples, and the starting materials used are commercially available unless otherwise specified.
Examples
Example 1
Embodiment 1 provides a hot concatenation type flexible container, it includes flexible container body 1 in the middle of the flexible container body 1 top and bottom intermediate position are equipped with feed inlet 2 and discharge gate 3 respectively four corners in flexible container body 1 upper portion all are equipped with strenghthened type suspender 4 the triangle intersection of flexible container body 1 all is equipped with sealed triangle module 5, flexible container body 1's bag body includes waterproof layer 6, base cloth layer 7 and waterproof layer 6 from inside to outside respectively, waterproof layer 6 is the complex film of PE and PP.
The number of the sealing triangle modules 5 is 8.
The sealing triangular module 5 is connected with the flexible freight bag body 1 through hot melt adhesive.
The hot melt adhesive is EVA hot melt adhesive.
The PE and PP composite film is characterized in that the dosage ratio of the PE to PP as raw materials is 1: 4.
the raw materials for preparing the PE and PP composite film also comprise 2.5 wt% of antistatic agent and 4 wt% of anti-ultraviolet agent.
The antistatic agent is cetyl trimethyl ammonium chloride and dodecyl dimethyl betaine.
The weight ratio of the hexadecyl trimethyl ammonium chloride to the dodecyl dimethyl betaine is 3: 1.
the ultraviolet resistant agent is 2-hydroxy-4-n-octoxy benzophenone and talcum powder.
The fineness of the talcum powder is 1250 meshes.
The purchasing merchant of the talcum powder is the Fujima Tenglong mining Co., Ltd, and the model is TL-611.
The weight ratio of the 2-hydroxy-4-n-octoxy benzophenone to the talcum powder is 2: 1.
the gram weight of the waterproof layer 6 is 30g/m2。
The gram weight of the base fabric layer 7 is 180g/m2。
The joint of the flexible freight bag body 1 and the reinforcing hanging strip 4 is also provided with 8 reinforcing modules 8, and the number of the reinforcing modules 8 is 8.
The reinforcing module 8 is connected with the flexible freight bag body 1 through hot melt adhesive.
The hot melt adhesive is EVA hot melt adhesive.
Embodiment 1 also provides a method for preparing a thermally spliced bulk bag, comprising the steps of:
1) weaving: the base cloth is woven by adopting warp and weft, and the warp-weft ratio of the base cloth is 1: 1;
2) coating: coating the inner and outer surfaces of the base cloth prepared in the step 1) with a PE and PP composite film by adopting a double-sided film coating process to obtain a finished cloth;
3) molding: cutting the finished fabric obtained in the step 2), and performing heat seal, sealing, splicing and molding to obtain the fabric.
The preparation method of the warp and weft in the step 1) can be as follows: extruding the raw materials for preparing warp and weft into film, cutting into strips, and finally stretching and shaping.
The raw material for preparing the warp and the weft is PP.
The running speed of the double-sided laminating process in the step 2) is 60 m/min.
The process conditions of the heat seal and seal splicing of the step 3) are as follows: the temperature is 300 ℃, the weight of the pinch roller is 50kg, and the running speed is 20 m/min.
Example 2
The number of the sealing triangle modules 5 is 8.
The sealing triangular module 5 is connected with the flexible freight bag body 1 through hot melt adhesive.
The hot melt adhesive is EVA hot melt adhesive.
The PE and PP composite film is characterized in that the dosage ratio of the PE to PP as raw materials is 1: 3.
the raw materials for preparing the PE and PP composite film also comprise 2.1 wt% of antistatic agent and 3 wt% of anti-ultraviolet agent.
The antistatic agent is cetyl trimethyl ammonium chloride and dodecyl dimethyl betaine.
The weight ratio of the hexadecyl trimethyl ammonium chloride to the dodecyl dimethyl betaine is 3: 1.
the ultraviolet resistant agent is 2-hydroxy-4-n-octoxy benzophenone and talcum powder.
The fineness of the talcum powder is 1250 meshes.
The purchasing merchant of the talcum powder is the Fujima Tenglong mining Co., Ltd, and the model is TL-611.
The weight ratio of the 2-hydroxy-4-n-octoxy benzophenone to the talcum powder is 2: 1.
the gram weight of the waterproof layer 6 is 25g/m2。
The gram weight of the base fabric layer 7 is 150g/m2。
The joint of the flexible freight bag body 1 and the reinforcing hanging strip 4 is also provided with 8 reinforcing modules 8, and the number of the reinforcing modules 8 is 8.
The reinforcing module 8 is connected with the flexible freight bag body 1 through hot melt adhesive.
The hot melt adhesive is EVA hot melt adhesive.
1) weaving: the base cloth is woven by adopting warp and weft, and the warp-weft ratio of the base cloth is 1: 0.7;
2) coating: coating the inner and outer surfaces of the base cloth prepared in the step 1) with a PE and PP composite film by adopting a double-sided film coating process to obtain a finished cloth;
3) molding: cutting the finished fabric obtained in the step 2), and performing heat seal, sealing, splicing and molding to obtain the fabric.
The preparation method of the warp and weft in the step 1) can be as follows: extruding the raw materials for preparing warp and weft into film, cutting into strips, and finally stretching and shaping.
The raw material for preparing the warp and the weft is PP.
The running speed of the double-sided laminating process in the step 2) is 50 m/min.
The process conditions of the heat seal and seal splicing of the step 3) are as follows: the temperature is 280 ℃, the weight of the pinch roller is 40kg, and the running speed is 15 m/min.
Example 3
The number of the sealing triangle modules 5 is 8.
The sealing triangular module 5 is connected with the flexible freight bag body 1 through hot melt adhesive.
The hot melt adhesive is EVA hot melt adhesive.
The PE and PP composite film is characterized in that the dosage ratio of the PE to PP as raw materials is 1: 5.
the raw materials for preparing the PE and PP composite film also comprise 3 wt% of antistatic agent and 5 wt% of anti-ultraviolet agent.
The antistatic agent is cetyl trimethyl ammonium chloride and dodecyl dimethyl betaine.
The weight ratio of the hexadecyl trimethyl ammonium chloride to the dodecyl dimethyl betaine is 3: 1.
the ultraviolet resistant agent is 2-hydroxy-4-n-octoxy benzophenone and talcum powder.
The fineness of the talcum powder is 1250 meshes.
The purchasing merchant of the talcum powder is the Fujima Tenglong mining Co., Ltd, and the model is TL-611.
The weight ratio of the 2-hydroxy-4-n-octoxy benzophenone to the talcum powder is 2: 1.
the gram weight of the waterproof layer 6 is 35g/m2。
The gram weight of the base fabric layer 7 is 210g/m2。
The joint of the flexible freight bag body 1 and the reinforcing hanging strip 4 is also provided with 8 reinforcing modules 8, and the number of the reinforcing modules 8 is 8.
The reinforcing module 8 is connected with the flexible freight bag body 1 through hot melt adhesive.
The hot melt adhesive is EVA hot melt adhesive.
1) weaving: the base cloth is woven by adopting warp and weft, and the warp-weft ratio of the base cloth is 1: 1.2;
2) coating: coating the inner and outer surfaces of the base cloth prepared in the step 1) with a PE and PP composite film by adopting a double-sided film coating process to obtain a finished cloth;
3) molding: cutting the finished fabric obtained in the step 2), and performing heat seal, sealing, splicing and molding to obtain the fabric.
The preparation method of the warp and weft in the step 1) can be as follows: extruding the raw materials for preparing warp and weft into film, cutting into strips, and finally stretching and shaping.
The raw material for preparing the warp and the weft is PP.
The running speed of the double-sided laminating process in the step 2) is 70 m/min.
The process conditions of the heat seal and seal splicing of the step 3) are as follows: the temperature is 320 ℃, the weight of the pinch roller is 60kg, and the running speed is 25 m/min.
Example 4
Embodiment 4 provides a thermal splicing type flexible freight bag and a preparation method thereof, and the specific implementation manner is the same as that in embodiment 1, except that the dosage ratio of PE and PP as raw materials for preparation in a PE and PP composite film is replaced by 1: 1.
example 5
example 6
Example 6 provides a thermally spliced-type bulk bag and a method for manufacturing the same, which are substantially the same as in example 1, except that the amount of cetyltrimethylammonium chloride is replaced with 0.
Example 7
Example 7 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the detailed description thereof is the same as example 1 except that the amount of dodecyl dimethyl betaine is replaced with 0.
Example 8
example 9
Embodiment 9 provides a thermal splicing type flexible freight bag and a preparation method thereof, and the specific implementation manner is the same as that in embodiment 1, except that the weight ratio of hexadecyltrimethylammonium chloride to dodecyl dimethyl betaine is replaced by 5: 1.
example 10
Example 10 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the detailed description thereof is the same as example 1, except that the temperature of the heat-sealing and splicing is replaced with 240 ℃.
Example 11
Example 11 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment is the same as example 1, except that the temperature of the heat-seal splicing is changed to 360 ℃.
Example 12
Embodiment 12 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment thereof is the same as embodiment 1, except that the warp-weft ratio of the base fabric is 1: 0.3.
example 13
Embodiment 13 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment is the same as embodiment 1, except that the gram weight of the waterproof layer 6 is replaced with 50g/m2。
Example 14
Example 14 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the detailed description thereof is the same as example 1, except that the grammage of the base fabric layer 7 is replaced with that of example 1Is 300g/m2。
Example 15
Embodiment 15 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment is the same as that of embodiment 1, except that the gram weight of the waterproof layer 6 is replaced with 35g/m2And replacing the gram weight of the base cloth layer 7 with 150g/m2。
Example 16
Embodiment 16 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment is the same as embodiment 1, except that the gram weight of the waterproof layer 6 is replaced by 25g/m2And replacing the gram weight of the base cloth layer 7 with 210g/m2。
Example 17
Example 17 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment is the same as example 1, except that the amount of 2-hydroxy-4-n-octoxybenzophenone is replaced with 0.
Example 18
Example 18 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment is the same as example 1, except that the amount of talc powder is replaced with 0.
Example 19
Embodiment 19 provides a thermal splicing type flexible freight bag and a preparation method thereof, and the specific implementation manner is the same as that in embodiment 1, except that the weight ratio of 2-hydroxy-4-n-octoxy benzophenone to talc powder is replaced by 1: 3.
example 20
Embodiment 20 provides a thermally spliced flexible freight bag and a method for manufacturing the same, and the specific embodiment is the same as embodiment 1, except that the weight ratio of 2-hydroxy-4-n-octoxy benzophenone to talc powder is replaced by 5: 1.
example 21
Embodiment 21 provides a thermally spliced flexible freight bag and a manufacturing method thereof, and the specific implementation manner is the same as that in embodiment 1, except that the running speed of the double-sided laminating process is replaced by 30 m/min.
Example 22
Embodiment 22 provides a thermally spliced flexible freight bag and a manufacturing method thereof, and the specific implementation manner is the same as that in embodiment 1, except that the running speed of the double-sided laminating process is replaced by 90 m/min.
Evaluation of Performance
1. The appearance of the bag body: the whole body of the flexible freight bags prepared in examples 1 to 9 and 17 to 22 was visually observed for the occurrence of the contamination phenomenon such as dust deposition, and the color of the surface of the bag body was observed for the uniformity.
2. Strength of the bag body: the test standards were carried out according to the PTA 1200kg package quality Specification 2018-3-12, three of the packaging bags prepared in examples 1 to 3 and 10 to 16 were randomly extracted, and the warp strength and the weft strength were measured, respectively, as 1, 2 and 3.
3. The ultraviolet resistance effect is as follows: the flexible freight bags prepared in the embodiments 1-3 and the embodiments 17-22 are subjected to ultraviolet resistance performance test and evaluation by referring to the standard GB/T18830-2009 evaluation of ultraviolet resistance performance of textiles. The ultraviolet protection coefficient UPF is a more index for evaluating the ultraviolet protection performance of the fabric at home and abroad at present, represents the ultraviolet protection capability of the fabric, and is the ratio of the average radiation quantity of ultraviolet to unprotected skin to the ultraviolet radiation energy after the tested fabric is shielded. The method for judging the uvioresistant performance of the fabric comprises the following steps: UPF is less than or equal to 14, poor; UPF is not less than 15 and not more than 24, preferably; UPF is more than or equal to 25 and less than or equal to 39, preferably; UPF is 40 or more, very good.
4. The molding effect is as follows: 10 flexible freight bags prepared in examples 1 to 9 were randomly selected, filled with the same powder, and the molding effect of each flexible freight bag was observed and recorded. The judgment standard is as follows: if more than or equal to 8 flexible freight bags keep upright and collapse, inclination and other phenomena do not occur, the forming effect is judged to be good; if the container bags are more than or equal to 5 and less than or equal to 7 and keep upright, and collapse, inclination and other phenomena do not occur, the forming effect is judged to be better; if <5 flexible freight bags are kept upright and collapse, inclination, etc. do not occur, the forming effect is judged to be poor.
Table 1 characterization of partial performance testing
Table 2 bag strength test results
As can be seen from the table 1, the thermally spliced flexible freight bag disclosed by the invention can keep higher cleanliness, does not cause pollution phenomena such as dust accumulation and the like, has uniform color and meets the requirement on the aesthetic property of the flexible freight bag; meanwhile, the flexible freight bag has qualified bag body strength and can meet the requirements of actual transportation and application; in addition, the flexible freight bag provided by the invention has a better forming effect and can better meet the requirements of consumers on novel flexible freight bags.
The foregoing examples are merely illustrative and serve to explain some of the features of the method of the present invention. The appended claims are intended to claim as broad a scope as is contemplated, and the examples presented herein are merely illustrative of selected implementations in accordance with all possible combinations of examples. Accordingly, it is applicants' intention that the appended claims are not to be limited by the choice of examples illustrating features of the invention. Also, where numerical ranges are used in the claims, subranges therein are included, and variations in these ranges are also to be construed as possible being covered by the appended claims.
Claims (10)
1. The utility model provides a hot concatenation type flexible container, its characterized in that, it includes flexible container body (1) be equipped with feed inlet (2) and discharge gate (3) respectively with bottom intermediate position in the middle of the flexible container body (1) top four corners in flexible container body (1) upper portion all are equipped with strenghthened type suspender (4) the triangle intersection of flexible container body (1) all is equipped with sealed triangle module (5), the bag body of flexible container body (1) includes waterproof layer (6), base cloth layer (7) and waterproof layer (6) from inside to outside respectively, waterproof layer (6) are the complex film of PE and PP.
2. The thermally spliced flexible freight bag according to claim 1, wherein the flexible freight bag body (1) is formed by heat-sealing and splicing, and the process conditions of the heat-sealing and splicing are as follows: the temperature is 280-320 ℃, the weight of the pinch roller is 40-60 kg, and the walking speed is 15-25 m/min.
3. The thermally spliced flexible freight bag according to claim 1, wherein the weight ratio of the raw materials PE and PP prepared in the composite film of PE and PP is 1: (3-5).
4. The thermally spliced flexible freight bag according to any one of claims 1 to 3, wherein the raw materials for preparing the PE/PP composite film further comprise 2.1 to 3 wt% of an antistatic agent and 3 to 5 wt% of an ultraviolet resistant agent.
5. The thermally spliced shipping container of claim 4, wherein said antistatic agent is at least one selected from the group consisting of cationic antistatic agents, anionic antistatic agents, nonionic antistatic agents, and amphoteric antistatic agents.
6. The thermally spliced shipping sack of claim 5 wherein said antistatic agent is a cationic antistatic agent or an amphoteric antistatic agent.
7. The thermally spliced shipping sack of claim 4, wherein said uv-resistant agent is an inorganic uv-resistant agent and/or an organic uv-resistant agent.
8. The thermally spliced bulk bag according to claim 1, wherein the waterproof layer (6) and the base fabric layer (7) have a grammage ratio of 1: (5-7).
9. A thermally spliced bulk bag according to claim 1, wherein the junction of the bulk bag body (1) and the reinforcing straps (4) is further provided with a reinforcing module (8).
10. A method of manufacturing a thermally spliced bulk bag according to any one of claims 1 to 9, comprising at least the steps of:
1) weaving: the base cloth is woven by adopting warp and weft, and the warp-weft ratio of the base cloth is 1: (0.7 to 1.2);
2) coating: coating the inner surface and the outer surface of the base cloth prepared in the step 1) with a PE and PP composite film by adopting a double-sided film coating process to obtain a finished cloth, wherein the running speed of the double-sided film coating process is 50-70 m/min;
3) molding: cutting the finished fabric obtained in the step 2), and performing heat seal, sealing, splicing and molding to obtain the fabric.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911064383.8A CN110789853A (en) | 2019-11-04 | 2019-11-04 | Hot concatenation type flexible container |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911064383.8A CN110789853A (en) | 2019-11-04 | 2019-11-04 | Hot concatenation type flexible container |
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| WO1995011126A1 (en) * | 1993-10-21 | 1995-04-27 | Linq Industrial Fabrics, Inc. | Anti-incendiary flexible intermediate bulk container system |
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| CN101161736A (en) * | 2007-09-29 | 2008-04-16 | 中国蓝星（集团）总公司 | Special coating resin combination for polypropylene heavy-load packaging bag and preparation method thereof |
| CN106544886A (en) * | 2016-12-06 | 2017-03-29 | 太仓大唐化纤厂 | A kind of waterproof antistatic looped fabric and its production technology |
| CN207511128U (en) * | 2017-07-25 | 2018-06-19 | 青岛沃德塑料包装有限公司 | A kind of heat resistanceheat resistant air aging, hydrothermal aging, ultraviolet ageing container bag |
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2019
- 2019-11-04 CN CN201911064383.8A patent/CN110789853A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1995011126A1 (en) * | 1993-10-21 | 1995-04-27 | Linq Industrial Fabrics, Inc. | Anti-incendiary flexible intermediate bulk container system |
| CN2690314Y (en) * | 2003-12-30 | 2005-04-06 | 双兴滤布企业股份有限公司 | Anti-leakage structure of package bag |
| CN101161736A (en) * | 2007-09-29 | 2008-04-16 | 中国蓝星（集团）总公司 | Special coating resin combination for polypropylene heavy-load packaging bag and preparation method thereof |
| CN106544886A (en) * | 2016-12-06 | 2017-03-29 | 太仓大唐化纤厂 | A kind of waterproof antistatic looped fabric and its production technology |
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