Container bag base cloth, M-fold container bag and production process of M-fold container bag

Abstract

The invention discloses a flexible freight bag base cloth, an M-fold flexible freight bag and a production process of the M-fold flexible freight bag, and relates to the technical field of flexible freight bags, the flexible freight bag base cloth comprises a base cloth body, the base cloth body is woven into a cylindrical shape through polypropylene wire drawing, and the interior of the base cloth body is coated with an inner adhesive film; after being preheated and softened, the base cloth body and the inner adhesive film are formed through an M-fold forming machine, and the M-fold base cloth body is wound into a roll; the free end of the base cloth body in the curled state is subjected to layered thermocompression welding to form a welding surface, and the welding surface is symmetrically cut; a feeding hole and a sling split body are formed in a cutting interval of the two welding surfaces, and the two sling split bodies are connected into a sling by adopting a sewing thread; the lower end of the base cloth body is integrally cut and plugged through a sewing thread to form a bag bottom; the hanging belts are connected with the bag bottom through the bag body. According to the flexible freight bag base cloth, the M-fold flexible freight bag and the production process of the M-fold flexible freight bag, automatic production is adopted, the labor consumption is reduced, the hanging belts and the flexible freight bag are integrally formed, and the strength and the sealing performance of the flexible freight bag are improved.

Description

Technical Field

[0001] The invention relates to the technical field of container bags, in particular to a container bag base fabric, an M-fold container bag and a production process thereof. Background Art

[0002] FIBC is a flexible transport packaging container, which is widely used in the transport packaging of powdered, granular and blocky items such as food, grains, medicines, chemicals and minerals. It has the characteristics of low price, firmness, reliability, moisture-proof and sun-proof.

[0003] The existing container bags include bags and slings, which have too many processing steps, and the slings are manually sewn on the container bags at a later stage. On the one hand, the strength of the slings is insufficient. During the pulling process, the uneven force may easily cause the pulling part and the side bag of the container bag to be torn apart, resulting in structural damage to the container bag, causing the objects in the container bag to fall, affecting work efficiency; on the other hand, during the use of the container bag, material leakage is prone to occur at the sewing part. At the same time, during the manual sewing process, the stitch length and stitches of the seam edges are affected by manual operations, and it is not easy to ensure consistency and standardization, and it is not easy to ensure sealing performance; further, it is not easy to achieve automated production, and a large amount of labor is required in the production process of the container bag.

[0004] How to develop bulk bag base fabric, M-fold bulk bag and its production process, use automated production to reduce the use of manpower, and make the sling and the bulk bag one-piece to improve the strength of the bulk bag, while reducing the area of ​​the sewing part and improving the sealing performance of the bulk bag, has become a technical problem that needs to be urgently solved by technical personnel in this field. Summary of the invention

[0005] The purpose of the present invention is to provide a bulk bag base fabric, an M-fold bulk bag and a production process thereof, so as to solve the problems listed in the background technology.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The container bag base fabric of the present invention comprises a base fabric body, wherein the base fabric body is woven into a cylindrical shape by drawing polypropylene, and the interior of the base fabric body is coated with an inner mucosa; the base fabric body and the inner mucosa are preheated and softened and then formed by an M-fold forming machine, and the M-folded base fabric body is wound into a roll.

[0008] Preferably, the peeling degree between the base fabric body and the inner mucosa is not less than 1.2N / 15mm, and the tensile strength in the longitudinal direction is not less than 1800N / 5cm.

[0009] M-fold container bag, the free end of the base fabric body in the curled state is subjected to layered hot-pressing welding to form a welding surface, and the welding surface is symmetrically cut;

[0010] The cutting area of ​​the two welding surfaces forms a feed port, the welding surface and the side wall of the base fabric body form a sling split body, and the two sling split bodies are connected to form a sling by stitching;

[0011] The lower end of the base fabric body is cut as a whole and sealed by the stitches to form a bag bottom;

[0012] The sling is connected to the bag bottom through the bag body.

[0013] Preferably, the bag body and the feed opening are square after being unfolded.

[0014] Preferably, the bag bottom 5 is in a V-shape with two pointed ends facing each other.

[0015] The production process of M-fold container bags includes the following steps:

[0016] S1, filament making, polypropylene particles are stirred and melted, and then formed into filaments or sheets through an extruder;

[0017] S2, circular weaving, weaving polypropylene yarn or polypropylene tape into a cylindrical base fabric body through a circular loom;

[0018] S3, coating the inner mucosa, coating the inner mucosa on the inner wall of the base fabric body by an inner mucosa machine;

[0019] S4, M-fold forming: after the base fabric body and the inner mucosa are preheated and softened, they are formed by the M-fold forming mechanism on the production line and rolled into a roll;

[0020] S5, the sling split body and the feed port are formed, the free end of the M-folded base fabric is layered hot-pressed and welded, and after welding, it is symmetrically cut on the welding surface to form the sling split body and the feed port;

[0021] S6. Printing: Print fonts on the outer surface of the bag according to production needs;

[0022] S7, the sling parts are butt-jointed, and the two sling parts are connected by stitches to form a closed sling;

[0023] S8, the lower end of the M-fold base fabric is cut. When the M-fold base fabric reaches the preset length of the container bag, the machine automatically cuts off the connection with the M-fold base fabric roll;

[0024] S8, bag bottom blocking, the lower end of the base fabric M-shaped bending area is blocked with stitches;

[0025] S9, the free end of the M-folded base fabric roll continues to repeat steps S5-S8 to complete the production and processing of the container bag.

[0026] Preferably, the step S5 includes performing hot-press welding on two V-shaped folds in the same direction of the M-folded base fabric respectively by a hot-press welding machine, and cutting along the center line of the welding surface by a partially sharpened circular cutting knife.

[0027] Preferably, the length of the blade of the partially sharpened circular cutting knife is equal to the length of the welding surface, and the length of the unsharpened portion of the circular cutting knife is equal to the length of the bag body.

[0028] Compared with the prior art, the beneficial technical effects of the present invention are:

[0029] The container bag base cloth, M-fold container bag and production process thereof of the present invention realize assembly line production by directly weaving the base cloth body into a cylindrical shape and performing M-folding, which not only improves the quality of the product, but also reduces the amount of labor and sewing machinery used during manual sewing, while reducing energy consumption and labor costs, and further reducing the floor space of the factory; at the same time, the sling is integrally formed with the bag body, which reduces the sewing area, ensures the sealing performance, and further improves the strength of the container bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 This is the front view of the M-fold container bag of the present invention (unfilled with materials);

[0032] Figure 2 This is the front view of the M-fold container bag of the present invention (material filling state);

[0033] Figure 3 This is a side view of the M-fold container bag of the present invention (material filling state);

[0034] Figure 4 This is a three-dimensional diagram of the M-fold container bag of the present invention (material filling state);

[0035] Figure 5 The M-fold container bag of the present invention is a three-dimensional Figure 1 (Disassembled state at the seam);

[0036] Figure 6 The M-fold container bag of the present invention is a three-dimensional Figure 2 (Disassembled state at the seam);

[0037] Figure 7 It is an enlarged schematic diagram of part A of the present invention (the joint is disassembled).

[0038] Explanation of the accompanying drawings: 1. base fabric body; 101. horizontal edge of the first sling; 102. horizontal edge of the second sling; 103. vertical edge of the first sling; 104. vertical edge of the second sling; 105. vertical edge of the first feed port; 106. vertical edge of the second feed port; 107. bag bottom opening; 2. bag body; 3. sling; 4. feed port; 5. bag bottom; 6. stitching; 7. welding surface. DETAILED DESCRIPTION

[0039] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0040] like Figure 1-7 As shown, the container bag base fabric includes a base fabric body 1, which is woven into a cylindrical shape by polypropylene drawing, and the interior of the base fabric body 1 is coated with an inner mucosa; the base fabric body 1 and the inner mucosa are preheated and softened and then formed by an M-fold forming machine. This forming method can enable the bag to be automatically made in the subsequent processing, and the bag shape is flatter, with fewer wrinkles and gaps, thereby improving the sealing and appearance of the bag. The M-folded base fabric body 1 is wound into a roll; by directly weaving the base fabric body into a cylindrical shape and performing M-folding, assembly line production is realized, which not only improves the quality of the product, but also reduces the amount of labor and sewing machinery used during manual sewing, while reducing energy consumption and labor costs, and further reduces the factory's floor space.

[0041] Specifically, the peeling degree between the base fabric body 1 and the inner mucosa is not less than 1.2N / 15mm, the tensile strength is not less than 1800N / 5cm in the longitudinal direction and not less than 2000N / 5cm in the transverse direction, and the gram weight range between the base fabric body and the inner mucosa is 100-200g / m 2 At the same time, the base fabric material should be added with an appropriate amount of anti-ultraviolet agent. After the aging resistance test, the strength retention rate of the material after 2 years of outdoor exposure should not be less than 70% of the initial strength.

[0042] M-fold container bag, the free end of the curled base fabric body 1 is subjected to layered hot-pressing welding to form a welding surface 7, the welding surface 7 is symmetrically cut to form a U-shaped welding surface, and the seams of the container bag that are not subjected to stress are welded by hot-pressing welding to ensure the sealing performance of the seams of the container bag;

[0043] The cutting area of ​​the two welding surfaces 7 forms a feed port 4, and a sling split is formed between the welding surface 7 and the side wall of the base fabric body 1. The two sling splits are connected to form a sling 3 by stitches 6. The seams of the sling splits need to withstand a large tensile force, and there is no filling material at the seams of the sling, so there is no need to consider the risk of leakage, so stitches are used for connection;

[0044] When in use, the slings are tied together, and strips of cloth with a different color from the base fabric are added to distinguish them, so as to improve the recognition during use;

[0045] The lower end of the base fabric body 1 is cut as a whole and sealed by the stitches 6 to form a bag bottom 5. The stitches at the bag bottom are in direct contact with the material and are sewn after single or double rolling to ensure the sealing and seam strength when the bag bottom is connected;

[0046] The sling 3 is connected to the bag bottom 5 through the bag body 2 .

[0047] Specifically, the bag body 2 and the feed port 4 are square after being unfolded, which is convenient for filling with materials and can fully improve the space utilization rate of the container bag during storage and transportation.

[0048] Specifically, the bag bottom 5 is in a V-shape with two pointed ends facing each other, and after being filled with materials, a double V-shaped square bottom is formed, so that the container bag is not easy to tip over.

[0049] The production process of M-fold container bags includes the following steps:

[0050] S1, filament making, polypropylene particles are stirred and melted, and then formed into filaments or sheets through an extruder;

[0051] S2, circular weaving, weaving polypropylene yarn or polypropylene tape into a cylindrical base fabric body through a circular loom;

[0052] S3, coating the inner mucosa, coating the inner mucosa on the inner wall of the base fabric body by an inner mucosa machine;

[0053] S4, M-fold forming: after the base fabric body and the inner mucosa are preheated and softened, they are formed by the M-fold forming mechanism on the production line and rolled into a roll;

[0054] S5, the sling body and the feed port are formed, the M-fold base fabric roll is rotated, the free end is layered and hot-pressed, and after welding, it is symmetrically cut on the welding surface to form the sling body and the feed port;

[0055] S6. Printing: Print fonts on the outer surface of the bag according to production needs;

[0056] S7, the sling parts are butt-jointed, and the two sling parts are connected by stitches to form a closed sling;

[0057] S8, the lower end of the M-fold base fabric is cut. When the M-fold base fabric reaches the preset length of a single container bag, the machine automatically cuts off the connection with the M-fold base fabric roll;

[0058] S8, bag bottom blocking, the lower end of the base fabric M-shaped bending area is blocked with stitches;

[0059] S9, the free end of the M-folded base fabric roll continues to repeat steps S5-S8 to complete the production and processing of the container bag.

[0060] Specifically, the step S5 includes performing hot-press welding on two V-shaped folds in the same direction of the M-fold base fabric respectively by a hot-press welding machine, and cutting along the center line of the welding surface by a partially sharpened circular cutting knife.

[0061] Specifically, the length of the blade of the partially sharpened circular cutting knife is equal to the length of the welding surface, and the length of the unsharpened portion of the circular cutting knife is equal to the length of the bag body, so that continuous cutting on an assembly line can be achieved.

[0062] Specifically, the steps S5-S8, unwinding, forming of slings and feed ports, slitting, printing, and bag bottom sealing are completed on one device, which reduces the use of labor and the use of a single sewing machine, realizes continuous production, and ensures the uniform stability and production quality of the products. It has extremely high flatness, standard structural dimensions, no wrinkles, is easy to roll or stack, reduces the error of automatic bagging during the filling process, and further reduces the floor space of the processing workshop.

[0063] like Figure 5-7 As shown, after the seams of the M-folded container bag are disassembled, the upper opening is divided into the first sling horizontal edge 101, the second sling horizontal edge 102, the first sling vertical edge 103, the second sling vertical edge 104, the first feed port vertical edge 105 and the second feed port vertical edge 106, and the lower opening is the bag bottom opening, and the bag bottom opening is an M-shape with two openings facing each other;

[0064] Before disassembly, the first sling vertical side 103 and the second sling vertical side 104 are hot-pressed and welded to form a sling split body. The four first sling vertical sides 103 are hot-pressed and welded to the four second sling vertical sides 104 to form a square feed port after unfolding. The first sling horizontal side 101 and the second sling horizontal side 102 between the two sling split bodies are connected by stitches to form a sling.

[0065] The two unfolded bottom edges of the bag bottom opening 107 are close to each other along the M folded edge and are integrally connected by sewing.

[0066] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0067] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. Container bag base fabric, characterized by: The invention comprises a base fabric body (1), wherein the base fabric body (1) is woven into a cylindrical shape by drawing polypropylene, and the interior of the base fabric body (1) is coated with an inner mucosa; the base fabric body (1) and the inner mucosa are preheated and softened and then formed by an M-fold forming machine, and the M-folded base fabric body (1) is wound into a roll.

2. The container bag base fabric according to claim 1, characterized in that: The peeling degree between the base fabric body (1) and the inner mucosa is not less than 1.2N / 15mm, and the tensile strength in the longitudinal direction is not less than 1800N / 5cm.

3. M-fold container bag, made of the container bag base fabric according to any one of claims 1-2, characterized in that: The free end of the curled base fabric body (1) is subjected to layered hot-pressing welding to form a welding surface (7), and the welding surface (7) is symmetrically cut; The cutting area of ​​the two welding surfaces (7) forms a feed port (4), a sling split body is formed between the welding surface (7) and the side wall of the base fabric body (1), and the two sling split bodies are connected by stitches (6) to form a sling (3); The lower end of the base fabric body (1) is cut as a whole and sealed by the stitching (6) to form a bag bottom (5); The sling (3) is connected to the bag bottom (5) through the bag body (2).

4. The M-fold container bag according to claim 3, characterized in that: The bag body (2) and the feed opening (4) are square when unfolded.

5. The M-fold container bag according to claim 4, characterized in that: The bag bottom (5) is in a V-shape with two pointed ends facing each other.

6. A production process for M-fold container bags, used for producing the M-fold container bags described in any one of 3-5, characterized in that: The steps include: S1, filament making, polypropylene particles are stirred and melted, and then formed into filaments or sheets through an extruder; S2, circular weaving, weaving polypropylene yarn or polypropylene tape into a cylindrical base fabric body through a circular loom; S3, coating the inner mucosa, coating the inner mucosa on the inner wall of the base fabric body by an inner mucosa machine; S4, M-fold forming: after the base fabric body and the inner mucosa are preheated and softened, they are formed by the M-fold forming mechanism on the production line and rolled into a roll; S5, the sling split body and the feed port are formed, the free end of the M-folded base fabric is layered hot-pressed and welded, and after welding, it is symmetrically cut on the welding surface to form the sling split body and the feed port; S6. Printing: Print fonts on the outer surface of the bag according to production needs; S7, the sling parts are butt-jointed, and the two sling parts are connected by stitches to form a closed sling; S8, the lower end of the M-fold base fabric is cut. When the M-fold base fabric reaches the preset length of the container bag, the machine automatically cuts off the connection with the M-fold base fabric roll; S8, bag bottom blocking, the lower end of the base fabric M-shaped bending area is blocked with stitches; S9, the free end of the M-folded base fabric roll continues to repeat steps S5-S8 to complete the production and processing of the container bag.

7. The production process of the M-fold container bag according to claim 6 is characterized in that: The step S5 includes performing hot-press welding on two V-shaped folds in the same direction of the M-fold base fabric respectively by a hot-press welding machine, and cutting along the center line of the welding surface by a partially sharpened circular cutting knife.

8. The production process of M-fold container bag according to claim 6, characterized in that: The length of the blade of the partially sharpened circular cutting knife is equal to the length of the welding surface, and the length of the unsharpened portion of the circular cutting knife is equal to the length of the bag body.

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