A paper-plastic composite bag with wear-resistant corners

Abstract

The present application provides a paper-plastic composite bag with wear-resistant corners, including a composite bag body, wherein the composite bag bodies on both sides include a paper-plastic layer, a first hollow layer, a reinforcement layer, a second hollow layer and a waterproof layer, and also include: a loading support assembly, which is used to adjust the material filling balance at the upper and lower ends of the composite bag body during the loading process, a stacking assembly, which is used for storage after the filling is sealed, the stacking assembly includes a supporting connecting plate, a linkage rope and a corner plate in the front side frame, and the top frame includes two groups of long top rods and two groups of short top rods, and a hinge is provided between the two groups of short top rods. The present application can inject force to the composite bag body at the lower end of the stack through the slight deformation of the composite bag body itself after filling the material, thereby realizing the operation of the stacking assembly, facilitating the positioning between the two composite bag bodies stacked on each other, and at the same time, after use, it can be quickly decomposed through the internal material properties, which is very environmentally friendly.

Description

Technical Field

[0001] The invention relates to the technical field of packaging bags, in particular to a paper-plastic composite bag with wear-resistant edges and corners. Background Art

[0002] Paper-plastic composite bags are made of plastic and kraft paper. Usually, the plastic layer uses flat woven fabric with polypropylene (PP) or polyethylene (PE) as the base material, and the kraft paper uses refined composite special kraft paper, which has the characteristics of high strength, good waterproofness and beautiful appearance. Paper-plastic composite bag: also known as three-in-one composite paper bag, is a small bulk container, mainly used for unit transportation by manpower or forklift. It is convenient for shipping small bulk powder and granular materials, with high strength, good waterproofness, beautiful appearance, easy loading and unloading, etc. It is one of the most popular and practical ordinary packaging materials. Refined white kraft paper or yellow kraft paper is used on the outside, and plastic woven cloth is used on the inside. The plastic particles PP are melted by high temperature and high pressure, and the kraft paper and plastic woven cloth are compounded together. An inner film bag can be added. The form of paper-plastic composite bag is equivalent to a seam bottom open bag. It has excellent characteristics such as good strength, waterproof and moisture-proof.

[0003] The prior art discloses a paper-plastic composite sealed bag of CN105923247B, which relates to the technical field of powder and granular material packaging. The bag comprises a bag body, the lower part of the bag body is folded and sealed to form a lower bottom, the upper part of the bag body is folded and sealed to form an upper bottom, and a valve structure connected to the inner cavity of the bag body is provided at the upper bottom; the bag body is made of a paper-plastic composite material, and a transparent pressure-stabilizing micropore is provided on the side wall. The bag body comprises a paper layer and a plastic layer compounded together by an adhesive, and the paper layer is arranged on the periphery of the plastic layer; the plastic layer is a plastic layer with a seamless side wall, and the paper layer is a paper layer with a side seam on the side wall, and the edge of the side seam is bonded by an adhesive. It has a simple structure, is easy to use, has good sealing performance, high strength, is not easy to crack at the side seam, and effectively improves the convenience and safety of production and transportation. During the use of the packaging bag, the device cannot effectively ensure that the expansion coefficient of the side of the bag body is the same when filling the material, and at the same time, it cannot be quickly degraded after use; therefore, we make improvements on this and propose a paper-plastic composite bag with wear-resistant corners. Summary of the invention

[0004] The purpose of the present invention is to address the problem that the current packaging bag design cannot effectively ensure that the expansion coefficients of the sides of the bag body are the same when filling materials, and at the same time, cannot be quickly degraded after use.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] Paper-plastic composite bags with wear-resistant corners can improve the above problems.

[0007] The specific application is as follows:

[0008] A paper-plastic composite bag with wear-resistant corners comprises a composite bag body, wherein both sides of the composite bag body comprise a paper-plastic layer, a first hollow layer, a reinforcement layer, a second hollow layer and a waterproof layer, and further comprises:

[0009] A loading support assembly, used for regulating the uniformity of material filling at the upper and lower ends of the composite bag body during loading, the loading support assembly comprising a top frame and a side frame, a linkage spring is provided between the top frames, and the loading support assembly also comprises an inner capsule embedded in the second hollow layer;

[0010] The stacking assembly is used for storage after filling and sealing, and the stacking assembly includes a supporting connecting plate, a linkage rope and a corner plate in the front side frame.

[0011] As a preferred technical solution of the present application, the top frame includes two groups of long top rods and two groups of short top rods, a hinge is provided between the two groups of short top rods, and a linkage spring is wrapped inside the hinge for folding and unfolding the two groups of short top rods.

[0012] As a preferred technical solution of the present application, inner linkage rings are provided at both ends of the two groups of short top rods, and outer linkage rings are provided at both ends of the two groups of long top rods. The outer linkage rings and the inner linkage rings are both sleeved on the two ends of the side frames, and the top frame and the side frame are embedded in the first hollow layer.

[0013] As a preferred technical solution of the present application, the inner capsule is embedded and installed in the second hollow layer, and the inside of the inner capsule is filled with intelligent colloid.

[0014] As a preferred technical solution of the present application, a supporting connecting plate is provided in the first hollow layer on the front side, and four groups of linkage ropes are connected to the outer end of the supporting connecting plate. A tail rod is fixed to the tail end of the linkage rope, and a slide cylinder is wrapped at the outer end of the tail rod, and a corner plate is provided at the outer end of the slide cylinder.

[0015] As a preferred technical solution of the present application, a positioning rod, a linkage plate and a rotating tail plate are provided at the outer end of the angle plate, the rear end of the rotating tail plate is fixed to the linkage plate, and the linkage plate is limited by the positioning rod.

[0016] As a preferred technical solution of the present application, the positioning rod is located at the head end of a group of rotating tail plates at the rear end, and a positioning hook plate is fixed to the lower end of the corner plate for hook positioning of the corner plates at the same vertical position of the upper and lower stacked composite bags, and a through hole is provided at the tail end of the slide cylinder.

[0017] As a preferred technical solution of the present application, a fixing rod is provided at the tail end of the angle plate, a linkage gear cylinder is fixed in the center of the fixing rod, a linkage gear rod is provided at the upper end of the linkage gear cylinder, the linkage gear rod is fixed on a linkage rope, and the linkage rope is connected to the support connecting plate and the angle plate by passing through the slot hole.

[0018] As a preferred technical solution of the present application, adhesive layers are provided at the upper and lower ends of the corner panels for being adhered and fixed to the four corners of the composite bag body.

[0019] An intelligent colloid for a paper-plastic composite bag with wear-resistant edges and corners, characterized in that it is made of the following raw materials in parts by weight: 5-10 parts of a density of 1.25-1.28 g / cm 3 PLA, 20-30 parts of epoxy resin soft glue, 30-50g of aluminum silicate fiber, 15-20 parts of polyamide fiber, and 2-6 parts of BHA.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] In the scheme of this application:

[0022] 1. The loading support assembly can ensure the symmetry of the upper and lower loading during filling, reduce the top pile and side expansion, and balance the expansion coefficient of different parts of the bag;

[0023] 2. The stacking assembly is used for storage after filling and sealing. When the composite bag is moved horizontally, the lower end of the composite bag protrudes downward. When a heavy object is pressed down on the upper end of the supporting connecting plate, the central part of the supporting connecting plate can be driven to be concave, and the back side can protrude downward by gravity. At this time, the protruding surface can be squeezed with the supporting connecting plate, so that gravity can act on the supporting connecting plate to drive the central part of the supporting connecting plate to be concave, pull the linkage rope around, and move the tail rod. When stacking, there is no need to set an external friction surface, and the stacking is positioned, which reduces the friction surface setting and increases the friction heat of transportation and movement;

[0024] 3. By filling the smart colloid, when dragging the composite bag, the friction surface can be heated up by local heat generation, which promotes the solidification of the smart colloid after absorbing heat, and increases the wear resistance coefficient of the friction surface. After dragging and placing, when the temperature of the friction surface returns to room temperature, the smart colloid can be softened by heat dissipation, which is convenient for stacking objects or folding and reusing the composite bag after use;

[0025] At the same time, the fiber components inside the smart colloid are wrapped with the granular PLA during curing, which can reinforce the inner capsule. At this time, the friction resistance of the composite bag is amplified;

[0026] When discarding the composite bag, the inner capsule can be squeezed and the acidic substance in the inner capsule can catalyze the smart colloid, thereby promoting the rapid oxidation reaction of the composite bag, which is very environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1A schematic diagram of the overall structure of the paper-plastic composite bag with wear-resistant corners provided in this application;

[0028] Figure 2 A schematic diagram of the structure of the first hollow layer and the second hollow layer of the paper-plastic composite bag with wear-resistant corners provided in this application;

[0029] Figure 3 A schematic diagram of the first hollow layer structure of the paper-plastic composite bag with wear-resistant corners provided in this application;

[0030] Figure 4 The paper-plastic composite bag with wear-resistant corners provided in this application Figure 2 A is a schematic diagram of the enlarged structure of the middle part;

[0031] Figure 5 The paper-plastic composite bag with wear-resistant corners provided in this application Figure 3 Partial cross-sectional bottom view;

[0032] Figure 6 A schematic diagram of the central part of the overall side section structure of the paper-plastic composite bag with wear-resistant corners provided in this application;

[0033] Figure 7 A schematic diagram of the side cross-sectional structure of the corner plate of the paper-plastic composite bag with wear-resistant corners provided in this application;

[0034] Figure 8 The paper-plastic composite bag with wear-resistant corners provided in this application Figure 7 A schematic diagram of the enlarged structure of B;

[0035] Fig. 9 A distribution diagram of the composite layer of the corner panel side section of the paper-plastic composite bag with wear-resistant corners provided in this application;

[0036] Fig.10 A distribution diagram of the composite layers in a side section of the front side of the composite bag body of the paper-plastic composite bag with wear-resistant edges and corners provided in the present application.

[0037] Indicated in the figure:

[0038] 1. Composite bag body; 2. Paper-plastic layer; 3. First hollow layer; 4. Reinforcement layer; 5. Second hollow layer; 6. Waterproof layer; 7. Adhesion layer; 8. Corner plate; 9. Top frame; 10. Side frame; 11. Linkage spring; 12. External linkage ring; 13. Internal linkage ring; 27. Inner bag;

[0039] 14. Through slot hole; 15. Support connecting plate; 16. Linkage rope; 17. Tail rod; 18. Slide cylinder; 19. Linkage gear rod; 20. Linkage gear cylinder; 21. Fixed rod; 22. Rotating tail plate; 23. Positioning hook plate; 24. Through hole; 25. Positioning rod; 26. Linkage plate. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them.

[0041] Therefore, the following detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents some embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. It should be noted that the embodiments of the present invention and the features and technical solutions in the embodiments can be combined with each other without conflict.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] like Figure 1-10 As shown, this embodiment provides a paper-plastic composite bag with wear-resistant corners, including a composite bag body 1, and the composite bag body 1 on both sides includes a paper-plastic layer 2, a first hollow layer 3, a reinforcement layer 4, a second hollow layer 5 and a waterproof layer 6, and also includes:

[0044] A loading support assembly, used for regulating the symmetry of the material filling at the upper and lower ends of the composite bag body 1 during the loading process, the loading support assembly comprises a top frame 9 and a side frame 10, a linkage spring 11 is provided between the top frames 9, and the loading support assembly also comprises an inner capsule 27 embedded in the second hollow layer 5;

[0045] The linkage spring 11 can facilitate the folding and opening of the top frame 9 , and the inner capsule 27 can facilitate the filling of the smart colloid.

[0046] The stacking assembly is used for storage after filling and sealing, and the stacking assembly includes a supporting connecting plate 15, a linkage rope 16 and a corner plate 8 in the front side frame 10.

[0047] The stacking assembly can quickly stack the composite bag bodies 1 after filling, and the stacking will not cause deviation.

[0048] like Figure 2 and 4 -5, as a preferred embodiment, on the basis of the above method, further, the top frame 9 includes two groups of long top rods and two groups of short top rods, a hinge is provided between the two groups of short top rods, and the interior of the hinge is wrapped with a linkage spring 11 for folding and unfolding the two groups of short top rods.

[0049] By arranging the top rod and the top frame 9, the bottom surface and the top surface of the loading can be conveniently limited.

[0050] Both ends of the two groups of short top rods are provided with inner linkage rings 13, and both ends of the two groups of long top rods are provided with outer linkage rings 12. The outer linkage rings 12 and the inner linkage rings 13 are both sleeved on both ends of the side frames 10, and the top frame 9 and the side frame 10 are embedded in the first hollow layer 3.

[0051] The linkage between the outer linkage ring 12 and the inner linkage ring 13 can facilitate the linkage between the top rod and the side frame 10, thereby driving the support of the entire frame.

[0052] The inner capsule 27 is embedded in the second hollow layer 5 , and the inner portion of the inner capsule 27 is filled with intelligent colloid.

[0053] By filling the smart colloid, when the composite bag body 1 is dragged, local heat generation can be achieved to heat up the friction surface, which promotes the smart colloid to solidify after absorbing heat, thereby increasing the wear resistance coefficient of the friction surface. After dragging and placing, when the temperature of the friction surface returns to room temperature, the smart colloid can be softened by heat dissipation, which is convenient for stacking objects or folding and reusing the composite bag body 1 after use.

[0054] When the composite bag body 1 is loaded with materials, the materials are poured into the composite bag body 1 which has not been fully expanded. At this time, the lower end of the composite bag body 1 is forced to expand outwards, and is opened outwards through the top frame 9 and the side frame 10 to form a regular rectangular parallelepiped. When pouring the materials, the linkage between the first hollow layer 3, the reinforcement layer 4 and the second hollow layer 5 can ensure that the horizontal cross-sections of the upper and lower loadings are consistent, thereby reducing the top stacking and side expansion, and balancing the expansion coefficients of different parts of the bag body.

[0055] like Figure 3 and 6 -8, as a preferred embodiment, on the basis of the above-mentioned method, further, a supporting connecting plate 15 is provided in the first hollow layer 3 on the front side, and the outer end of the supporting connecting plate 15 is connected with four groups of linkage ropes 16, and the tail end of the linkage rope 16 is fixed with a tail rod 17, and the outer end of the tail rod 17 is wrapped with a slide cylinder 18, and the outer end of the slide cylinder 18 is provided with a corner plate 8.

[0056] By providing the corner plates 8, the wear on the four corners of the composite bag body 1 can be reduced;

[0057] When the composite bag body 1 is transported horizontally in the air, its back side will protrude downward due to gravity. At this time, the protruding surface can be squeezed with the supporting link plate 15, so that gravity can act on the supporting link plate 15, causing the central part of the supporting link plate 15 to be concave, pulling the linkage rope 16 around, and causing the tail rod 17 to move.

[0058] The outer end of the angle plate 8 is provided with a positioning rod 25 , a linkage plate 26 and a rotating tail plate 22 . The rear end of the rotating tail plate 22 is fixed to the linkage plate 26 , and the linkage plate 26 is limited by the positioning rod 25 .

[0059] A ruler spring is provided between the positioning rod 25 and the linkage plate 26. When the tail rod 17 is not positioned in the slide tube 18, the positioning of the ruler spring can drive the rotating tail plate 22 to bend.

[0060] The positioning rod 25 is located at the head end of the rear end group of the rotating tail plate 22, and a positioning hook plate 23 is fixed to the lower end of the angle plate 8, which is used for hook positioning of the angle plates 8 at the same vertical position of the upper and lower stacked composite bag bodies 1. A through hole 24 is provided at the tail end of the slide tube 18.

[0061] By setting the positioning hook plate 23 , when the corner plate 8 of the composite bag body 1 at the lower end is squeezed and tilted upward, the rotating tail plate 22 can be bent and hooked in the positioning hook plate 23 .

[0062] A fixing rod 21 is provided at the tail end of the angle plate 8, a linkage gear cylinder 20 is fixed in the center of the fixing rod 21, a linkage gear rod 19 is provided at the upper end of the linkage gear cylinder 20, and the linkage gear rod 19 is fixed on the linkage rope 16, and the linkage rope 16 is connected to the support connecting plate 15 and the angle plate 8 through the through slot 14.

[0063] The linkage gear cylinder 20 is driven to rotate by the linkage gear rod 19 , so that the angle plate 8 can be pushed to tilt upward quickly, and the linkage gear cylinder 20 is fixed on the angle plate 8 .

[0064] Adhesive layers 7 are provided at the upper and lower ends of the corner plate 8 for being adhered and fixed to the four corners of the composite bag body 1 .

[0065] By adhering the corner plate 8 to the composite bag body 1 through the adhesive layer 7, the four corners of the composite bag body 1 can be quickly reinforced and positioned.

[0066] By setting the stacking assembly, when a heavy object is pressed down on the upper end of the supporting connecting plate 15, the central part of the supporting connecting plate 15 can be driven to be concave, and the four groups of linkage ropes 16 connected to the outer ends are stretched inward, driving the tail rod 17 to move inward along the slide cylinder 18. At this time, the multiple groups of rotating tail plates 22 located at the outer end of the slide cylinder 18 have no central limit, and rotate under the linkage of the positioning rod 25 and the linkage plate 26, and the linkage rope 16 drives the linkage gear rod 19 to move, pushing the linkage gear cylinder 20 to rotate, driving the angle plate 8 to tilt upward, and the multiple groups of rotating tail plates 22 whose outer ends have been bent hook the positioning hook plate 23 at the outer end of the upper composite bag body 1. At this time, they can be stacked on each other to generate restrictions, ensuring that the composite bag bodies 1 between each other will not move, thereby causing the stacking body to deviate;

[0067] When the composite bag body 1 at the upper end is removed, the gravity at the upper end of the supporting connecting plate 15 is released at the moment of lifting, so the supporting connecting plate 15 moves upward, pushing the four sets of linkage ropes 16 to rebound, driving the tail rod 17 to continue to enter the slide cylinder 18, so that the rotating tail plate 22 is smoothed, and the limit between the composite bag body 1 at the upper end and the composite bag body 1 of the next layer can be released. At the same time, the wear of the corners can be avoided by setting the corner plate 8.

[0068] By locally generating heat, the friction surface is heated up, which drives the smart colloid to solidify after absorbing heat, thereby increasing the wear resistance of the friction surface. After dragging and placing, when the temperature of the friction surface returns to room temperature, the smart colloid can be softened by heat dissipation, which is convenient for stacking objects or folding and reusing the composite bag body 1.

[0069] The composite bag body 1 is loaded by pouring the material from the composite bag body 1 that has not been fully expanded. At this time, the lower end of the composite bag body 1 is forced to expand outward, and is opened outward through the top frame 9 and the side frame 10 to form a regular rectangular parallelepiped. When pouring the material, the linkage between the first hollow layer 3, the reinforcement layer 4 and the second hollow layer 5 can ensure that the horizontal cross-sections of the upper and lower loadings are consistent. At the same time, the inner capsule 27 tightens the side of the composite bag body 1, reducing the top stacking and the side expansion, and can balance the expansion coefficients of different parts of the bag body;

[0070] After the filling is completed and the bag is sealed, the composite bag body 1 is tilted horizontally and transported in the air. When a heavy object is pressed down on the upper end of the supporting connecting plate 15, the central part of the supporting connecting plate 15 can be driven to be concave. At this time, the downward surface of the inner bag 27 expands, making the front inner bag of the composite bag body 1 thinner, and the four groups of linkage ropes 16 connected to the outer end are stretched inward, driving the tail rod 17 to move inward along the slide cylinder 18. At this time, the multiple groups of rotating tail plates 22 located at the outer end of the slide cylinder 18 have no central limit, and rotate under the linkage of the positioning rod 25 and the linkage plate 26, and the linkage rope 16 drives the linkage gear rod 19 to move, pushing the linkage gear cylinder 20 to rotate, driving the angle plate 8 to tilt upward, and the outer end has been bent. The multiple groups of rotating tail plates 22 hook the positioning hook plates 23 at the outer ends of the upper composite bag bodies 1. At this time, they can be stacked on each other to create limitations, ensuring that the composite bag bodies 1 between each other will not move, thereby causing the stacked body to deviate. When the upper composite bag body 1 is removed, the gravity at the upper end of the supporting connecting plate 15 is released at the moment of lifting, so that the supporting connecting plate 15 moves upward, pushing the four groups of linkage ropes 16 to rebound, driving the tail rod 17 to continue to enter the slide 18, so that the rotating tail plate 22 is smoothed, which can push the limit between the upper composite bag body 1 and the composite bag body 1 of the next layer to be released. At the same time, the wear of the corners can be avoided by setting the angle plate 8.

[0071] An intelligent colloid for a paper-plastic composite bag with wear-resistant edges and corners, characterized in that it is made of the following raw materials in parts by weight: 5-10 parts of a density of 1.25-1.28 g / cm 3 PLA, 20-30 parts of epoxy resin soft glue, 30-50g of aluminum silicate fiber, 15-20 parts of polyamide fiber, and 2-6 parts of BHA.

[0072] By injecting granular PLA and aluminum silicate fiber into the mixed colloid of epoxy resin soft glue, polyamide fiber and BHA and stirring evenly, the PLA particle molecules can collide with each other when the bag is dragged, driving the rapid heat conduction of the friction surface, thereby driving the entire smart colloid to absorb heat and solidify. After the moving composite bag 1 is completed, when it is left to stand, the smart colloid quickly releases heat and softens under the catalysis of the internal catalyst, and restores the initial state, which does not affect the subsequent use. In addition, through the mixing of multiple raw materials, when the composite bag 1 is discarded, the inner capsule 27 can be broken by pinching. The side layers of the inner capsule 27 are layered with degradation enzymes, which can catalyze the smart colloid, thereby promoting the rapid reaction of the composite bag 1, which is very environmentally friendly.

[0073] Through the internal PLA and aluminum silicate fibers, the solidification and toughness of the solidified body can be achieved during solidification. During softening, the mutual entanglement of PLA and aluminum silicate fibers can ensure the stability of the smart colloid and reduce shaking.

[0074] The above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, the present invention is not limited to the above specific implementation methods. Therefore, any modification or equivalent replacement of the present invention; and all technical solutions and improvements thereof that do not depart from the spirit and scope of the invention are included in the scope of the claims of the present invention.

Claims

1. A paper-plastic composite bag with wear-resistant edges and corners, comprising a composite bag body (1), characterized in that: The composite bag bodies (1) on both sides include a paper-plastic layer (2), a first hollow layer (3), a reinforcement layer (4), a second hollow layer (5) and a waterproof layer (6), and further include: A loading support assembly is used to control the uniformity of material filling at the upper and lower ends of the composite bag body (1) during loading, the loading support assembly comprising a top frame (9) and a side frame (10), a linkage spring (11) being arranged between the top frame (9), the loading support assembly further comprising an inner capsule (27) embedded in the second hollow layer (5), the inner capsule (27) being embedded and installed in the second hollow layer (5), and the inner capsule (27) is filled with a smart colloid; A stacking assembly, used for storage after filling and sealing, the stacking assembly comprising a supporting connecting plate (15), a linkage rope (16) and a corner plate (8) in the front side frame (10); The top frame (9) comprises two groups of long top rods and two groups of short top rods. A hinge is provided between the two groups of short top rods. A linkage spring (11) is wrapped inside the hinge for folding and unfolding the two groups of short top rods. Internal linkage rings (13) are provided at both ends of the two groups of short top rods. External linkage rings (12) are provided at both ends of the two groups of long top rods. The external linkage rings (12) and the internal linkage rings (13) are both sleeved on both ends of the side frame (10). The top frame (9) and the side frame (10) are embedded in the first hollow layer (3). The first hollow layer on the front side is (3) is provided with a supporting connecting plate (15), the outer end of the supporting connecting plate (15) is connected to four groups of linkage ropes (16), the tail end of the linkage rope (16) is fixed with a tail rod (17), the outer end of the tail rod (17) is wrapped with a slide tube (18), the outer end of the slide tube (18) is provided with an angle plate (8), the outer end of the angle plate (8) is provided with a positioning rod (25), a linkage plate (26) and a rotating tail plate (22), the rear end of the rotating tail plate (22) and the linkage plate (26) are fixed to each other, and the linkage plate (26) is limited by the positioning rod (25).

2. The paper-plastic composite bag with wear-resistant edges and corners according to claim 1, characterized in that: The positioning rod (25) is located at the head end of the rear group of rotating tail plates (22), and a positioning hook plate (23) is fixed to the lower end of the corner plate (8) for hook positioning of the corner plates (8) at the same vertical position of the composite bag bodies (1) stacked up and down. A through hole (24) is provided at the rear end of the slide tube (18).

3. The paper-plastic composite bag with wear-resistant edges and corners according to claim 2, characterized in that: A fixing rod (21) is provided at the rear end of the angle plate (8), a linkage gear cylinder (20) is fixed at the center of the fixing rod (21), a linkage gear rod (19) is provided at the upper end of the linkage gear cylinder (20), the linkage gear rod (19) is fixed on a linkage rope (16), and the linkage rope (16) is connected to the supporting connecting plate (15) and the angle plate (8) by passing through the slot hole (14).

4. The paper-plastic composite bag with wear-resistant edges and corners according to claim 3, characterized in that: Adhesive layers (7) are provided at the upper and lower ends of the corner plate (8) for being adhered and fixed to the four corners of the composite bag body (1).

5. The intelligent colloid for a paper-plastic composite bag with wear-resistant edges and corners according to claim 1, characterized in that: The invention is made of the following raw materials in parts by weight: 5-10 parts of PLA with a density of 1.25-1.28 g / cm³, 20-30 parts of epoxy resin soft glue, 30-50 g of aluminum silicate fiber, 15-20 parts of polyamide fiber, and 2-6 parts of BHA.

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