Self-sealing plastic packaging bag

Abstract

The utility model discloses a self-sealing plastic packaging bag which comprises a bag body, a sealing mechanism is arranged on one side of the bag body, the sealing mechanism comprises a connecting belt, the bottom of the connecting belt is fixedly connected with the bag body, the top of the connecting belt is fixedly connected with a winding pipe, and the top of the back face of the bag body is fixedly connected with a first hook-and-loop fastener. According to the self-sealing plastic packaging bag, the sealing mechanism is arranged, a rolling pipe is rotated, along with rotation of the rolling pipe, a connecting belt is rolled, along with rolling, the top of the bag body is rolled, so that a first hook-and-loop fastener makes contact with a second hook-and-loop fastener, sealing work is conducted, then a plug pin is connected with the rolling pipe in an inserted mode, and the sealing work is completed. Through the arrangement of the first protection mechanism, the inner wall of the bag body has the puncture-resistant and waterproof functions, and through the arrangement of the second protection mechanism, the outer surface of the bag body has the puncture-resistant and wear-resistant performance.

Description

Technical Field

[0001] This utility model relates to the field of packaging bag technology, specifically a self-sealing plastic packaging bag. Background Technology

[0002] Plastic packaging bags are bags made primarily of plastic and used for packaging various items. They are widely used in the packaging industry, and through processing techniques such as blow molding, extrusion, and injection molding, plastic raw materials are made into bags of different shapes, sizes, and thicknesses to meet the packaging needs of various commodities.

[0003] According to patent document CN217893722U, a high-strength, easily degradable plastic packaging bag is disclosed, comprising a packaging bag body and an integrated assembly. A hanging piece is fixedly connected to the center of the top of the packaging bag body. The packaging bag body includes a first mounting component and a second mounting component. Reinforcing fibers are installed through the first mounting component on the opposite side of the second mounting component. The integrated assembly includes an anti-aging outer layer, a tensile layer, a flexible connecting layer, and a tough inner layer. A through hole is provided at the connection between the packaging bag body and the hanging piece. The reinforcing fibers are bent. This utility model, through the combined use of the first mounting component, reinforcing fibers, second mounting component, anti-aging outer layer, tensile layer, flexible connecting layer, and tough inner layer, solves the problems of existing biodegradable plastic packaging bags having generally low tensile and toughness, resulting in limited load-bearing capacity and susceptibility to breakage due to excessive weight, and lacking fiber reinforcement, thus reducing the practicality of biodegradable plastic packaging bags.

[0004] Traditional plastic packaging bags currently lack self-sealing functionality during daily use, meaning that once opened, they cannot be resealed, making the items susceptible to moisture damage and failing to meet usage requirements. Utility Model Content

[0005] The purpose of this utility model is to provide a self-sealing plastic packaging bag to solve the problem mentioned in the background art that the current traditional plastic packaging bags do not have a self-sealing function during daily use, which makes it impossible to reseal the stored items after opening, thus making the items easy to get damp and damaged, and failing to meet the usage requirements.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a self-sealing plastic packaging bag, comprising a bag body, a sealing mechanism provided on one side of the bag body, the sealing mechanism including a connecting strap, the bottom of the connecting strap being fixedly connected to the bag body, a winding tube being fixedly connected to the top of the connecting strap, a first Velcro fastener being fixedly connected to the top of the back of the bag body, a second Velcro fastener being fixedly connected to the top of the front of the bag body, a hollow rod being fixedly connected to the central axis of the back of the bag body, springs being fixedly connected to both sides of the inner cavity of the hollow rod, a rectangular plate being fixedly connected to one side of the spring, and a pin being fixedly connected to one side of the rectangular plate.

[0007] Preferably, the inner cavity of the bag is provided with a first protective mechanism, which includes a high-density polyethylene plastic layer and a water-based polyurethane coating layer, and the outer side of the bag is provided with a second protective mechanism, which includes a polyester plastic layer and a water-based acrylic coating layer.

[0008] Preferably, four sealing strips are fixedly connected to the top of the front and rear sides of the inner cavity of the bag.

[0009] Preferably, the first hook and loop fastener is made of nylon hook side and the second hook and loop fastener is made of nylon fleece side.

[0010] Preferably, a carrying strap is fixedly connected to the bottom of both the front and back of the bag body, and movable grooves are provided on both sides of the hollow rod, with the inner cavity of the movable groove slidably connected to the pin.

[0011] Preferably, the high-density polyethylene plastic layer is fixedly connected to the inner wall of the bag and the front of the connecting strap, and the water-based polyurethane coating layer is applied to one side of the high-density polyethylene plastic layer.

[0012] Preferably, the polyester plastic layer is fixedly connected to the outer wall of the bag and the back of the connecting strap, and the water-based acrylic coating layer is applied to one side of the polyester plastic layer.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. By setting up a sealing mechanism, rotating the take-up tube will first wind up the connecting strip. As the winding continues, the top of the bag will be wound up, causing the first Velcro to contact the second Velcro, thus sealing the bag. Then, the pin is inserted into the take-up tube for further limiting, resulting in a good sealing effect.

[0015] 1. By setting up the first protective mechanism, the inner wall of the bag is made puncture-resistant and waterproof. By setting up the second protective mechanism, the outer surface of the bag is made puncture-resistant and abrasion-resistant, thus making the bag less prone to damage. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 3 This is a cross-sectional view of the hollow rod of this utility model;

[0019] Figure 4 This is a schematic diagram of the first protective mechanism of this utility model;

[0020] Figure 5 This is a cross-sectional view of the first protective mechanism of this utility model;

[0021] Figure 6 This is a cross-sectional view of the second protective mechanism of this utility model.

[0022] In the diagram: 1. Bag body; 2. Sealing mechanism; 201. Connecting strap; 202. Retractor tube; 203. First Velcro closure; 204. Second Velcro closure; 205. Sealing strip; 206. Hollow rod; 207. Spring; 208. Rectangular plate; 209. Pin; 3. Handle rope; 4. First protective mechanism; 401. High-density polyethylene plastic layer; 402. Water-based polyurethane coating layer; 5. Second protective mechanism; 501. Polyester plastic layer; 502. Water-based acrylic coating layer. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 , Figure 2 and Figure 3This utility model provides a technical solution: a self-sealing plastic packaging bag, including a bag body 1, a sealing mechanism 2 on one side of the bag body 1, the sealing mechanism 2 including a connecting strap 201, the bottom of the connecting strap 201 being fixedly connected to the bag body 1, a winding tube 202 being fixedly connected to the top of the connecting strap 201, a first Velcro 203 being fixedly connected to the top of the back of the bag body 1, a second Velcro 204 being fixedly connected to the top of the front of the bag body 1, a hollow rod 206 being fixedly connected to the central axis of the back of the bag body 1, springs 207 being fixedly connected to both sides of the inner cavity of the hollow rod 206, a rectangular plate 208 being fixedly connected to one side of the springs 207, and a pin 209 being fixedly connected to one side of the rectangular plate 208. By setting the sealing mechanism 2, rotating the winding tube 202 will first wind up the connecting strap 201, and as the winding proceeds, the top of the bag body 1 will be sealed. The bag is wound up, causing the first hook and loop fastener 203 to come into contact with the second hook and loop fastener 204 for sealing. Then, the pin 209 is inserted into the winding tube 202 for further limiting, resulting in a good sealing effect. Four sealing strips 205 are fixedly connected to the top of the front and rear sides of the inner cavity of the bag body 1, further improving the sealing effect. The first hook and loop fastener 203 has a nylon hook surface, and the second hook and loop fastener 204 has a nylon fleece surface. The nylon hook and loop surfaces facilitate the connection between the first and second hook and loop fasteners 203 and 204. Handle straps 3 are fixedly connected to the bottom of the front and back sides of the bag body 1. Movable grooves are provided on both sides of the hollow rod 206, and the inner cavity of the movable groove is slidably connected to the pin 209. The movable grooves stabilize the operation of the pin 209 and provide balanced support.

[0025] Please see Figure 4 , Figure 5 and Figure 6The inner cavity of the bag body 1 is provided with a first protective mechanism 4, which includes a high-density polyethylene plastic layer 401 and a water-based polyurethane coating layer 402. The outer side of the bag body 1 is provided with a second protective mechanism 5, which includes a polyester plastic layer 501 and a water-based acrylic coating layer 502. By providing the first protective mechanism 4, the inner wall of the bag body 1 has puncture resistance and waterproof function. By providing the second protective mechanism 5, the outer surface of the bag body 1 has puncture resistance and abrasion resistance, thereby making the bag body 1 less prone to damage. The high-density polyethylene plastic layer 401 is fixedly connected to the inner wall of the bag body 1 and the connecting... On the front of the connecting strap 201, a water-based polyurethane coating layer 402 is applied to one side of the high-density polyethylene plastic layer 401. By setting the high-density polyethylene plastic layer 401, it has puncture resistance and tensile strength. By setting the water-based polyurethane coating layer 402, it has excellent wear resistance. The polyester plastic layer 501 is fixedly connected to the outer wall of the bag body 1 and the back of the connecting strap 201. A water-based acrylic coating layer 502 is applied to one side of the polyester plastic layer 501. By setting the polyester plastic layer 501, it has waterproof and puncture resistance. By setting the water-based acrylic coating layer 502, it has good wear resistance.

[0026] Working principle: By setting the sealing mechanism 2, rotating the take-up tube 202, the connecting tape 201 will be wound up first as the take-up tube 202 rotates. As the winding proceeds, the top of the bag body 1 will be wound up, so that the first hook and loop fastener 203 and the second hook and loop fastener 204 will come into contact, thereby performing the sealing work. Then, the pin 209 is inserted into the take-up tube 202 to further limit the position, so that the sealing effect is good.

[0027] By setting the first protective mechanism 4, the inner wall of the bag body 1 is made puncture-resistant and waterproof. By setting the second protective mechanism 5, the outer surface of the bag body 1 is made puncture-resistant and abrasion-resistant, thus making the bag body 1 less prone to damage.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A self-sealing plastic bag comprising a bag body (1), characterised in that: One side of the bag body (1) is provided with a sealing mechanism (2), the sealing mechanism (2) includes a connecting belt (201), the bottom of the connecting belt (201) is fixedly connected with the bag body (1), the top of the connecting belt (201) is fixedly connected with a winding pipe (202), the top of the back of the bag body (1) is fixedly connected with a first magic tape (203), the top of the front of the bag body (1) is fixedly connected with a second magic tape (204), the middle axis of the back of the bag body (1) is fixedly connected with a hollow rod (206), both sides of the inner cavity of the hollow rod (206) are fixedly connected with springs (207), one side of the spring (207) is fixedly connected with a rectangular plate (208), one side of the rectangular plate (208) is fixedly connected with a bolt (209).

2. A self-closing plastic bag according to claim 1, wherein: The inner cavity of the bag body (1) is provided with a first protection mechanism (4), the first protection mechanism (4) includes a high-density polyethylene plastic layer (401) and a water-based polyurethane paint layer (402), the outer side of the bag body (1) is provided with a second protection mechanism (5), the second protection mechanism (5) includes a polyester plastic layer (501) and a water-based acrylic paint layer (502).

3. A self-closing plastic bag according to claim 1, wherein: The top of the front side and the back side of the inner cavity of the bag body (1) is fixedly connected with a sealing strip (205), the number of the sealing strip (205) is four.

4. A self-closing plastic bag according to claim 1, wherein: The first magic tape (203) is a nylon hook face, and the second magic tape (204) is a nylon velvet face.

5. A self-closing plastic bag according to claim 1, wherein: The bottom of the front and back of the bag body (1) is fixedly connected with a carrying rope (3), both sides of the hollow rod (206) are provided with a movable groove, and the inner cavity of the movable groove is slidably connected with the bolt (209).

6. A self-closing plastic bag according to claim 2, wherein: The high-density polyethylene plastic layer (401) is fixedly connected to the inner wall of the bag body (1) and the front of the connecting belt (201), and the water-based polyurethane paint layer (402) is coated on one side of the high-density polyethylene plastic layer (401).

7. A self-closing plastic bag according to claim 2, wherein: The polyester plastic layer (501) is fixedly connected to the outer wall of the bag body (1) and the back of the connecting belt (201), and the water-based acrylic paint layer (502) is coated on one side of the polyester plastic layer (501).

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