A POF high performance heat shrink film

Abstract

The application discloses a kind of POF high-performance heat shrinkable film, including packing bag body, the bottom of the inner wall of packing bag body is fixedly sleeved with reinforcing mesh frame, the top of packing bag body is folded and sealed, the side of packing bag body is provided with opening, the inner wall of packing bag body is fixedly pasted with reinforcing ring matched with opening, first folding part, second folding part and two third folding part junction are fixedly connected by hot-pressing, fire-retardant layer is fixedly sleeved on the outside of heat shrinkable film layer by extrusion, wear-resistant layer is fixedly sleeved on the outside of fire-retardant layer by extrusion.The application utilizes the setting mode that packing bag body, reinforcing mesh frame and reinforcing ring cooperate, reinforcing mesh frame is fixedly sleeved on the bottom of the inner wall of packing bag body, so that the bottom of packing bag body is folded and sealed by first folding part, second folding part and third folding part, the strength of its bottom can be improved, reinforcing ring can reinforce the opening at the side of packing bag body, avoid product to scatter and fall when lifting.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of heat shrinkable film, in particular to a POF high-performance heat shrinkable film. BACKGROUND

[0002] POF has the characteristics of high surface gloss, good toughness, high tear resistance, uniform heat shrinkage and suitability for full-automatic high-speed packaging, etc., and is a replacement product of traditional PVC heat shrinkable film. POF means heat shrinkable film. POF is a full name of multi-layer co-extrusion polyolefin heat shrinkable film. It is processed by special processes such as three extruder plasticizing extrusion, die forming and film bubble inflation, etc., with linear low-density polyethylene as the middle layer, and co-polypropylene as the inner and outer layers.

[0003] The packaged goods can be reliably wrapped by the reliable shrink force when the temperature is greater than or close to the stretching temperature. The food industry is the largest market of heat shrink packaging. Heat shrink film is widely used in the packaging of various fast food, lactic acid food, beverage, small food, wine product, agricultural and sideline product, dry food and local specialty.

[0004] When packaging and binding multiple bottled products, the heat shrinkable film is processed into a barrel, the bottom of which is fixed by heat pressing to prevent movement. In order to facilitate the taking of the packaged product, holes are provided on the outside of the barrel for carrying. However, this production method reduces the overall strength of the heat shrinkable film, and the bottom or hole of the heat shrinkable film may be damaged when carrying, which may cause the product inside to fall out. SUMMARY

[0005] The present application aims to provide a POF high-performance heat shrinkable film to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a POF high-performance heat shrinkable film, comprising:

[0007] A packaging bag body for binding and packaging products;

[0008] A reinforcing mesh frame is fixedly sleeved at the bottom of the inner wall of the packaging bag body, the top of the packaging bag body is folded and sealed, a plurality of openings are provided on the side of the packaging bag body, and a plurality of reinforcing rings matched with the openings are fixedly attached to the inner wall of the packaging bag body.

[0009] Preferably, the packaging bag body comprises a heat shrinkable film layer, a flame-retardant layer, a wear-resistant layer and an antistatic layer. The flame-retardant layer is fixedly sleeved outside the heat shrinkable film layer by extrusion, the wear-resistant layer is fixedly sleeved outside the flame-retardant layer by extrusion, and the antistatic layer is fixedly sleeved inside.

[0010] Preferably, the heat-shrinkable film layer includes a high-density polyethylene layer, an outer polypropylene layer, and an inner polypropylene layer, wherein the outer polypropylene layer and the inner polypropylene layer are extruded and fixedly sleeved on the outer and inner sides of the high-density polyethylene layer, respectively.

[0011] Preferably, the bottom of the front side of the packaging bag and the bottom of the front side of the reinforcing mesh frame are folded inward to form a first fold, and the bottom of the back side of the packaging bag and the bottom of the back side of the reinforcing mesh frame are folded inward to form a second fold.

[0012] Preferably, the bottom of both sides of the packaging bag body and the bottom of both sides of the reinforcing mesh frame are folded inward to form a third fold, and the first fold, the second fold and the two third folds are connected by heat pressing.

[0013] Preferably, the opening is folded inward to form a folded portion, the reinforcing ring is fixedly connected between the folded portion and the packaging bag body, and the top of the packaging bag body is compressed and folded to form a folding band portion.

[0014] Preferably, the reinforcing ring includes an outer wrapping layer and multiple reinforcing threads, the outer wrapping layer wrapping around the outside of the multiple reinforcing threads, and the reinforcing mesh frame includes multiple warp fibers and multiple weft fibers, the multiple warp fibers and multiple weft fibers being interwoven in a cross-shaped mesh.

[0015] This invention also provides a production process for POF high-performance heat-shrinkable film, including the following specific steps:

[0016] S1: A tubular product produced by plasticizing and extruding using an extruder;

[0017] S2: Cut the tubular product one into a quantity of product two;

[0018] S3: Fix and attach a reinforcing mesh frame to the bottom of the inner wall of the second cylindrical product to form the third product;

[0019] S4: Fold the four sides of the bottom of product three to form a first fold, a second fold, and two third folds. The first fold, the second fold, and the two third folds are then fixedly connected by heat pressing to form product four.

[0020] S5: Fix and attach multiple reinforcing rings to the inner wall of product four, and make corresponding openings according to the position of the reinforcing rings. Fold the openings to form a folded part that wraps around the reinforcing rings to form product five.

[0021] S6: The top of product five is compressed and folded to form a folded band 25, and the packaging bag body 1 is formed.

[0022] Preferably, the S1 adopts three extruders to work for plasticizing and extruding the products in the barrel, respectively for extruding low-density polyethylene, polypropylene to form low-density polyethylene layer, outer polypropylene layer and inner polypropylene layer, and then processing the heat-shrinkable film layer through die forming, film bubble inflation process, and then extruding the flame-retardant layer material, wear-resistant layer material and antistatic layer material by using the extruder, so that the flame-retardant layer, wear-resistant layer and antistatic layer are respectively fixed and pasted on the outside and inside of the heat-shrinkable film layer.

[0023] Technical effects and advantages of the present application:

[0024] The present application uses the setting mode of the cooperation of the packaging bag body, the reinforcing net frame and the reinforcing ring, the reinforcing net frame is fixedly sleeved on the bottom of the inner wall of the packaging bag body, so that the bottom of the packaging bag body is folded and sealed through the first folding part, the second folding part and the third folding part, the strength of the bottom can be improved, and the reinforcing ring can reinforce the opening on the side of the packaging bag body, so that the products are prevented from scattering and falling during lifting. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present application.

[0026] Figure 2 It is a schematic diagram of the overall structure of the present application.

[0027] Figure 3 It is a schematic diagram of the overall structure of the reinforcing net frame of the present application.

[0028] Figure 4 It is a schematic diagram of the internal structure of part of the side of the present application.

[0029] Figure 5 It is a schematic diagram of the internal structure of part of the side of the present application. Figure 4 It is a schematic diagram of the internal structure of part of the side of the present application.

[0030] Figure 6 It is a schematic diagram of the overall structure of the reinforcing ring of the present application.

[0031] In the figure: 1, packaging bag body; 11, heat-shrinkable film layer; 12, flame-retardant layer; 13, wear-resistant layer; 14, antistatic layer; 2, reinforcing net frame; 21, first folding part; 22, second folding part; 23, third folding part; 24, folding part; 25, pressure folding belt part; 3, opening; 41, reinforcing ring; 42, reinforcing line. DETAILED DESCRIPTION

[0032] Clearly, the embodiments described are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort belong to the scope of protection of the present application.

[0033] The present application provides a POF high-performance heat-shrinkable film as shown in Figures 1-6 The present application provides a POF high-performance heat-shrinkable film as shown in

[0034] The packaging bag body 1 is used for binding and packaging products, and includes a heat-shrinkable film layer 11, a flame-retardant layer 12, a wear-resistant layer 13, and an antistatic layer 14. The flame-retardant layer 12 is fixedly sleeved outside the heat-shrinkable film layer 11 by extrusion, the wear-resistant layer 13 is fixedly sleeved outside the flame-retardant layer 12 by extrusion, and the antistatic layer 14 is fixedly sleeved inside by extrusion. The heat-shrinkable film layer 11 includes a density polyethylene layer, an outer polypropylene layer, and an inner polypropylene layer. The outer polypropylene layer and the inner polypropylene layer are fixedly sleeved on the outer side and the inner side of the density polyethylene layer by extrusion. The flame-retardant layer 12 can improve the flame-retardant performance of the packaging bag body 1, the wear-resistant layer 13 can improve the wear-resistant performance of the outside of the packaging bag body 1, and the antistatic layer 14 can improve the antistatic performance of the inside of the packaging bag body 1. Therefore, when packaging products that require protection against static electricity, static electricity generated by friction can be reduced. The thickness of the heat-shrinkable film layer 11 is 7-8 mm, the thickness of the flame-retardant layer 12 is 2-3 mm, the thickness of the wear-resistant layer 13 is 2-3 mm, and the thickness of the antistatic layer 14 is 1.5-2.5 mm. Therefore, when the heat-shrinkable film layer 11 shrinks due to heat, the flame-retardant layer 12, the wear-resistant layer 13, and the antistatic layer 14 can shrink to a certain extent along with the heat-shrinkable film layer 11.

[0035] Further, the bottom of the inner wall of the packaging bag body 1 is fixedly sleeved with a reinforcing mesh frame 2, the top of the packaging bag body 1 is folded and sealed, a plurality of openings 3 are formed in the side of the packaging bag body 1, and a plurality of reinforcing rings 41 matched with the openings 3 are fixedly attached to the inner wall of the packaging bag body 1. The openings 3 facilitate carrying the packaging bag body 1, and the reinforcing rings 41 can improve the strength of the edges of the openings 3 under the wrapping of the folding part 24, so as to prevent the packaging bag body 1 from being broken at the openings 3 when carrying the packaging bag body 1.

[0036] Further, the bottom of the front of the packaging bag body 1 and the bottom of the front of the reinforcing mesh frame 2 are folded inward to form a first folding part 21, the bottom of the back of the packaging bag body 1 and the bottom of the back of the reinforcing mesh frame 2 are folded inward to form a second folding part 22, and the bottom of both sides of the packaging bag body 1 and the bottom of both sides of the reinforcing mesh frame 2 are folded inward to form a third folding part 23, and the first folding part 21, the second folding part 22 and the two third folding parts 23 are connected by heat pressing and fixedly connected, and the bottom of the packaging bag body 1 can be in a sealed state after being folded and sealed by the first folding part 21, the second folding part 22 and the two third folding parts 23, and the carrying capacity of the bottom of the packaging bag body 1 can be improved under the action of the reinforcing mesh frame 2, so that the bottom of the packaging bag body 1 is prevented from being loose and cracked and causing the product to fall off.

[0037] Further, the opening 3 is folded inward to form a folded part 24, the reinforcing ring 41 is fixedly connected between the folded part 24 and the packaging bag body 1, the top of the packaging bag body 1 is compressed and folded to form a compression folding belt part 25, and the compression folding belt part 25 can increase the thickness of the top edge of the packaging bag body 1, thereby improving the strength of the top edge of the packaging bag body 1 and preventing the top of the packaging bag body 1 from being loose and disconnected.

[0038] Further, the reinforcing ring 41 comprises an external wrapping layer and a plurality of reinforcing lines 42, the external wrapping layer wraps the outside of the plurality of reinforcing lines 42, the reinforcing mesh frame 2 comprises a plurality of warp fibers and a plurality of weft fibers, the plurality of warp fibers and the plurality of weft fibers are cross-shaped and interwoven, and the plurality of warp fibers and the plurality of weft fibers have a certain softness, so that they can deform along with the bottom of the packaging bag body 1 and can enhance the strength of the bottom of the packaging bag body 1.

[0039] The application also provides a production process of a POF high-performance heat-shrinkable film, which comprises the following specific use steps:

[0040] The product 1 is plasticized and extruded by an extruder, three extruders are used to extrude low-density polyethylene, polypropylene, form low-density polyethylene layers, outer polypropylene layers and inner polypropylene layers, and then the heat-shrinkable film layer 11 is processed by a die forming and film bubble blowing process, the density of the low-density polyethylene is 0.955g / cm 3 -0.965g / cm 3 , the flow rate of the low-density polyethylene is 9g / 10min-14g / 10min, the density of the polypropylene is 0.920g / cm 3 -0.925g / cm 3, the polypropylene flow rate is 1g / 10min-2.5g / 10min, then the flame-retardant layer 12 material, the wear-resistant layer 13 material and the antistatic layer 14 material are extruded by the extruder, so that the flame-retardant layer 12, the wear-resistant layer 13 and the antistatic layer 14 are respectively fixed and pasted to the outside and the inside of the heat-shrinkable film layer 11, and the extrusion rate of the flame-retardant layer 12 material, the wear-resistant layer 13 material and the antistatic layer 14 material is respectively 7g / 10min-10g / 10min, 5g / 10min-7.5g / 10min and 1.5g / 10min-3g / 10min;

[0041] Quantitative cutting is performed on the cylindrical product one to form a product two;

[0042] The reinforcing mesh frame 2 is fixed and pasted to the bottom of the inner wall of the cylindrical product two to form a product three;

[0043] The four edges of the bottom of the product three are folded to form a first folding part 21, a second folding part 22 and two third folding parts 23, and the first folding part 21, the second folding part 22 and the two third folding parts 23 are fixedly connected by hot pressing to form a product four;

[0044] A plurality of reinforcing rings 41 are fixed and pasted to the inner wall of the product four, and corresponding openings 3 are formed according to the positions of the reinforcing rings 41, and the openings 3 are folded to form a folding part 24 wrapping the reinforcing rings 41 to form a product five;

[0045] The top of the product five is compressed and folded to form a compression folding part 25, and the packaging bag body 1 is formed.

[0046] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing embodiments of the present application have been described in detail, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included in the scope of protection of the present application.

Claims

1. A POF high-performance heat-shrinkable film, comprising: Packaging bag (1), which is used to secure the product; The features are as follows: a reinforcing mesh frame (2) is fixedly sleeved on the bottom of the inner wall of the packaging bag body (1), the top of the packaging bag body (1) is folded and sealed, multiple openings (3) are opened on the side of the packaging bag body (1), and multiple reinforcing rings (41) that match the openings (3) are fixedly pasted on the inner wall of the packaging bag body (1). The bottom of the front of the packaging bag (1) and the bottom of the front of the reinforcing mesh frame (2) are folded inward to form a first fold (21), and the bottom of the back of the packaging bag (1) and the bottom of the back of the reinforcing mesh frame (2) are folded inward to form a second fold (22). The bottom of both sides of the packaging bag body (1) and the bottom of both sides of the reinforcing mesh frame (2) are folded inward to form a third fold (23). The first fold (21), the second fold (22) and the two third folds (23) are connected by heat pressing. The reinforced mesh frame (2) includes multiple warp fibers and multiple weft fibers, which are interwoven in a cross-shaped mesh, and the multiple warp fibers and multiple weft fibers have a certain degree of softness.

2. The POF high-performance heat-shrinkable film according to claim 1, characterized in that, The packaging bag body (1) includes a heat shrink film layer (11), a flame retardant layer (12), a wear-resistant layer (13) and an antistatic layer (14). The flame retardant layer (12) is extruded and fixedly sleeved on the outside of the heat shrink film layer (11). The wear-resistant layer (13) is extruded and fixedly sleeved on the outside of the flame retardant layer (12). The antistatic layer (14) is extruded and fixedly sleeved on the inside.

3. The POF high-performance heat-shrinkable film according to claim 2, characterized in that, The heat-shrinkable film layer (11) includes a high-density polyethylene layer, an outer polypropylene layer and an inner polypropylene layer, wherein the outer polypropylene layer and the inner polypropylene layer are fixedly sleeved on the outer and inner sides of the high-density polyethylene layer by extrusion.

4. The POF high-performance heat-shrinkable film according to claim 1, characterized in that, The opening (3) is folded inward to form a folded part (24), and the reinforcing ring (41) is fixedly connected between the folded part (24) and the packaging bag body (1). The top of the packaging bag body (1) is compressed and folded to form a folding band part (25).

5. The POF high-performance heat-shrinkable film according to claim 4, characterized in that, The reinforcing ring (41) includes an outer wrapping layer and multiple reinforcing lines (42). The outer wrapping layer is wrapped around the outside of the multiple reinforcing lines (42). The reinforcing mesh frame (2) includes multiple warp fibers and multiple weft fibers, which are interwoven in a cross-shaped mesh.

6. A production process for the POF high-performance heat-shrinkable film according to any one of claims 1-5, characterized in that, The specific usage steps are as follows: S1: A product packaged in a tub using an extruder for plasticizing and extruding. S2: Cut the tubular product one into a quantity to form product two; S3: Fix and attach a reinforcing mesh frame (2) to the bottom of the inner wall of the second cylindrical product to form the third product; S4: Fold the four sides of the bottom of product three to form a first fold (21), a second fold (22) and two third folds (23), and the first fold (21), the second fold (22) and the two third folds (23) are fixedly connected by hot pressing to form product four; S5: Fix and attach multiple reinforcing rings (41) to the inner wall of product four, and make corresponding openings (3) according to the position of the reinforcing rings (41), and fold the openings (3) to form a folded part (24) to wrap the reinforcing rings (41) to form product five; S6: The top of product five is compressed and folded to form a folded band (25), and the packaging bag body (1) is formed.

7. The production process of a POF high-performance heat-shrinkable film according to claim 6, characterized in that, The product S1 is produced by extruding a plasticized cylindrical product using an extruder. Three extruders are used to extrude low-density polyethylene and polypropylene respectively to form a low-density polyethylene layer, an outer polypropylene layer and an inner polypropylene layer. The heat shrinkable film layer (11) is then formed by die forming and film bubble blowing. Then, flame retardant layer (12), wear-resistant layer (13) and antistatic layer (14) are extruded using an extruder, so that the flame retardant layer (12), wear-resistant layer (13) and antistatic layer (14) are fixedly attached to the outside and inside of the heat shrinkable film layer (11) respectively.

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