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CN-224198283-U - Vacuum sealing bag

CN224198283UCN 224198283 UCN224198283 UCN 224198283UCN-224198283-U

Abstract

The utility model discloses a vacuum envelope which comprises a bag body, wherein the bag body comprises a wall body formed by a plastic film, a bag opening formed at the top of the wall body and a bag bottom axially opposite to the bag opening, the wall body is of a circumferentially closed continuous surface structure, the inner surface of the wall body is surrounded to form a vacuum accommodating cavity, the inner surface of the wall body is provided with functional concave-convex textures, and the concave-convex textures continuously extend from the bag opening to the bag bottom along the inner surface of the wall body to form a gas exhaust path. The bag mouth is a bag mouth which can be sealed by hot melting. The utility model has the beneficial effects of greatly reducing the cost by simplifying the process and reducing the waste of scraps.

Inventors

  • YE CHANGQING

Assignees

  • 广东威林科技股份有限公司

Dates

Publication Date
20260505
Application Date
20250402
Priority Date
20250318

Claims (9)

  1. 1. A vacuum envelope, comprising: The bag body (10), the bag body (10) comprises a wall body (11) formed by plastic films, a bag opening (12) formed at the top of the wall body (11) and a bag bottom (13) axially opposite to the bag opening (12); The wall body (11) is of a circumferentially closed continuous surface structure, and the inner surface of the wall body is surrounded to form a vacuum accommodating cavity (15); the inner surface of the wall body (11) is provided with functional concave-convex textures (14), and the concave-convex textures (14) continuously extend from the bag opening (12) to the bag bottom (13) along the inner surface of the wall body (11) to form a gas exhaust path; the bag opening (12) is a bag opening which can be sealed by hot melting; The bag bottom (13) is an open bag bottom; The bag (10) is in the form of a continuous web.
  2. 2. Vacuum envelope pocket according to claim 1, characterized in that the wall (11) is integrally formed by a blow-moulding process.
  3. 3. The vacuum envelope pocket according to claim 1, characterized in that the convex shape of the relief texture (14) is any one or a combination of straight lines, oblique straight lines or wavy lines.
  4. 4. A vacuum envelope pocket as claimed in claim 3, characterized in that the relief texture (14) has a raised height of 0.1-0.5mm.
  5. 5. Vacuum envelope according to claim 4, characterized in that the relief texture (14) has a convex shape of rectilinear strips extending axially of the envelope.
  6. 6. The vacuum envelope pocket of claim 5, wherein the rectilinear stripe has a width of 0.5-3mm and the adjacent grain spacing is 0.5-5mm.
  7. 7. The vacuum envelope pocket of claim 1, wherein, The distribution area of the concave-convex texture (14) is any one of the following: a) Covering the entire area of the inner surface of the wall body (11); b) The inner surface of the wall body (11) is covered by 20% -90% of the area, and the non-covered area is a smooth surface.
  8. 8. The vacuum envelope pocket of any one of claims 1-2, wherein the plastic film has a thickness of 10-300 μm.
  9. 9. The vacuum envelope pocket of claim 1, wherein the plastic film is of a single layer construction and is of polyethylene or polypropylene.

Description

Vacuum sealing bag Technical Field The utility model relates to the technical field of vacuum packaging, in particular to a circumferentially closed vacuum packaging bag with a continuous surface structure. Background The vacuum sealing machine realizes long-term storage of the articles through two core procedures of vacuumizing and heat sealing. The working flow comprises the steps of 1, vacuumizing, namely placing a vacuum sealing bag in a sealing groove, starting a vacuum pump to pump air in the bag to a preset pressure or time threshold value, and 2, performing heat sealing, namely instantaneously fusing a double-layer film (such as a PA/PE composite material) at the bag opening by using a heating element to form an airtight seal. In order to realize effective air extraction, the traditional vacuum sealing bag is required to be provided with a concave-convex texture structure in the bag opening area so as to avoid blocking of a gas channel caused by adhesion between film layers. The structure of the prior art envelope is shown in fig. 1-3, and is composed of the following parts: the smooth plastic film layer 0111 provides basic tightness and mechanical strength; the concave-convex texture plastic film layer 0112, wherein concave-convex textures 04 are arranged on the inner wall of the concave-convex texture plastic film layer 0112, and the gaps between the concave-convex texture plastic film layers 0112 form gas exhaust paths; the fusion edge 06 is formed by bonding the edges of the two layers of films through hot pressing; The smooth plastic film layer 0111 and the concave-convex texture plastic film layer 0112 are formed into a vacuum accommodating cavity 015 by surrounding the inner surfaces of the fused edges 06. The existing vacuum sealing bag has the defects that: 1. The step-by-step manufacturing process is complex, namely a smooth surface film and a concave-convex texture film are required to be respectively prepared, and the equipment investment and the labor cost are high through independent cutting, superposition, edge fusion and other multiple procedures; 2. The material utilization rate is low, and edge scraps are easily increased due to uneven tension when two rolls of films are synchronously processed; The problems cause that the production cost of the traditional vacuum sealing bag is high, and the market competitiveness is restricted especially in a mass production scene. Disclosure of utility model Aiming at the defects of the prior art, the utility model provides a novel vacuum sealing bag structure, which can omit the steps of separating and rolling, and overlapping, thereby remarkably simplifying the production flow and reducing the manufacturing cost. In order to achieve the above object, the present utility model provides a vacuum envelope, comprising: the bag body comprises a wall body formed by plastic films, a bag opening formed at the top of the wall body and a bag bottom axially opposite to the bag opening; the wall body is a circumferentially closed continuous surface structure, and the inner surface of the wall body is enclosed to form a vacuum accommodating cavity; The inner surface of the wall body is provided with functional concave-convex textures, and the concave-convex textures continuously extend from the bag mouth to the bag bottom along the inner surface of the wall body to form a gas exhaust path. The bag mouth is a bag mouth which can be sealed by hot melting. Further, the bag bottom is any one of the following structures: a) A closed bag bottom sealed by hot melting; b) The bottom of the pocket is opened. Further, the wall is integrally formed by a blow molding process. Further, the convex shape of the concave-convex texture is any one or combination of linear stripes, oblique linear stripes or wavy stripes. Further, the height of the protrusions of the concave-convex texture is 0.1-0.5 mm. Further, the convex shape of the concave-convex texture (14) is a linear stripe extending along the axial direction of the bag body. Further, the width of the linear stripes is 1-3mm, and the distance between adjacent textures is 2-5mm. Further, the concave-convex texture (14) distribution area is any one of the following: a) Covering the entire area of the inner surface of the wall body (11); b) The inner surface of the wall body (11) is covered by 20% -90% of the area, and the non-covered area is a smooth surface. Further, the thickness of the plastic film is 10-300 μm. Further, the plastic film has a single-layer structure and is made of polyethylene or polypropylene. The utility model has the beneficial effects that the cost can be greatly reduced by the following modes: 1. the vacuum sealing bag structure can improve a plurality of procedures of respectively preparing a smooth surface film and a concave-convex texture film, cutting, overlapping, fusing edges and the like in the prior art into an integrated molding by a blow molding process, and simplifies the process; 2.