Compression Bag

This application is a continuation application of International Application No. PCT/IB2025/054820, filed on May 8, 2025, which is based upon and claims priority to Chinese Patent Application No. 202421034596.2, filed on May 13, 2024, the entire contents of which are incorporated herein by reference.

The present disclosure relates to the technical field of vacuum compression bags, and in particular to a compression bag.

A vacuum compression bag is a storage bag that can evacuate air and enable the atmospheric pressure to naturally compress internal items. In daily life, it is mainly applied to household storage for clothing and bedding, travel storage for a change of clothes, etc. The vacuum compression bag can be used to store cotton quilts, cotton-padded clothes, pillows, blankets, towels, and other highly compressible items. It not only can save storage space, but also can achieve moisture-proof, mildew-resistant and anti-odor effects, and prevent the growth of bacteria and mites.

However, the existing vacuum compression bags are prone to air leakage at their corners in use, such that the interior of the vacuum compression bag communicates with the outside and blows up. This leads to growth of mildew on the clothing in the vacuum compression bag, compression failure of the vacuum compression bag, and bag expansion, and takes up more space.

Therefore, the technical problem to be solved urgently in the field is to provide a vacuum compression bag with desirable sealing performance.

The present disclosure aims to solve one of the technical problems in the related art to some extent. In view of this, the present disclosure provides a compression bag. The compression bag has desirable sealing performance, and can improve storage efficiency and prevent mildew of the clothing.

To achieve the above objective, the present disclosure provides a compression bag. The compression bag includes a bag body, a sealing strip, and a one-way valve, where two sides of the bag body are respectively folded inwardly to form folding portions; portions between the folding portions respectively form bag sheets; two ends of the bag body are sealed; an edge of at least one end of the bag body is thermocompression-sealed; an elongated hole and a valve hole are formed in the bag body; the sealing strip is fixedly provided in the elongated hole, and can be configured to selectively open or seal the elongated hole; the one-way valve is fixedly provided in the valve hole; and the one-way valve allows unidirectional flow from inside to outside, ensuring that a fluid (for example, which may include gas) in the compression bag is discharged through the valve hole.

Optionally, edges of the two ends of the bag body are thermocompression-sealed.

Optionally, an edge of a first end of the bag body is thermocompression-sealed; a second end of the bag body is provided with a bottom bag sheet; and a periphery of the bottom bag sheet is thermocompression-bonded to a corresponding bag sheet and a corresponding folding portion, so as to seal the second end of the bag body.

Optionally, both the elongated hole and the valve hole are formed in the bag sheet.

Optionally, the folding portion includes a pair of folding sheets stacked between the bag sheets; at the at least one end of the bag body with the thermocompression-sealed edge, edges of the folding sheets corresponding to the at least one end of the bag body are respectively thermocompression-bonded to edges of adjacent bag sheets, and edges of ends of the adjacent bag sheets located between the folding portions are thermocompression-bonded to each other; and at the end of the bag body provided with the bottom bag sheet, edges of ends of the folding sheets are thermocompression-bonded to an edge of the bottom bag sheet.

Optionally, edges of the folding sheets of at least one folding portion corresponding to at least one side of the end of the bag body are thermocompression-bonded to each other.

Optionally, a viewing window is formed on the bag body; and light transmittance of the viewing window of the bag body is greater than light transmittance of other regions of the bag body.

Optionally, the viewing window is located on the bag sheet, and the viewing window extends from the folding portion at one side of the bag body to the folding portion at the other side of the bag body.

Optionally, the viewing window is provided around the bag body. Optionally, the viewing window is located on the bag sheet, and the viewing window extends from one end of the bag body to the other end of the bag body.

Optionally, the sealing strip and the one-way valve are provided on the same bag sheet as the viewing window; and the sealing strip and the one-way valve are respectively located at two sides of the viewing window.

Optionally, an extension direction of the sealing strip is parallel to an extension direction of the viewing window.

Optionally, the one-way valve is located at a center of a region of the bag sheet corresponding to one side of the viewing window.

Optionally, the bag sheet includes a light-transmissive sheet and connection sheets respectively connected to two sides of the light-transmissive sheet; and a portion of the light-transmissive sheet not overlapped with the connection sheet forms the viewing window. Optionally, light transmittance of the light-transmissive sheet is not less than 30%.

Optionally, the compression bag has a size of 150 mm to 500 mm along a width direction in which a laminated edge extends.

Optionally, the compression bag has the size of 220 mm to 430 mm along the width direction.

Optionally, the compression bag has a size of 200 mm to 800 mm along a length direction.

Optionally, the compression bag has the size of 370 mm to 670 mm along the length direction.

Optionally, the viewing window has a size of 60 mm to 300 mm along the width direction.

Optionally, the viewing window has the size of 85 mm to 180 mm along the width direction.

Optionally, the lamination has a width of 20 mm to 90 mm.

Optionally, the lamination has the width of 45 mm to 75 mm.

Optionally, the sealing strip extends from one end of the bag body to the other end of the bag body, or the sealing strip extends along an edge of an end of the bag body; and

a force application hole is formed in a laminated edge of the end of the bag body; the force application hole penetrates through the laminated edge along a thickness direction; and a position of the force application hole corresponds to a position of an end of the sealing strip.

Optionally, the sealing strip includes a zipper; the zipper includes a slider, a first teeth set, and a second teeth set; the first teeth set includes a plurality of first zipper teeth; the second teeth set includes a plurality of second zipper teeth; the first teeth set and the second teeth set are respectively fixedly provided at two side edges of the elongated hole, and distributed along an extension direction of the elongated hole; and the slider is configured to move along the elongated hole and engage or disengage the first teeth set and the second teeth set.

Optionally, the zipper further includes a first connection sheet and a second connection sheet; the first teeth set is fixedly provided on the first connection sheet; the second teeth set is fixedly provided on the second connection sheet; and an outer edge of the first connection sheet and an outer edge of the second connection sheet are respectively thermocompression-bonded to the two side edges of the elongated hole.

Optionally, a material of the bag body includes thermoplastic.

Optionally, a laminated edge reinforcing portion is further provided on the laminated edge; the laminated edge reinforcing portion is overlaid on the laminated edge; and the force application hole penetrates through the laminated edge reinforcing portion and the laminated edge along the thickness direction.

Optionally, the force application hole is located at a corner of the bag body; and the force application hole is in the shape of any one of a triangle, an approximate triangle, a trapezoid, and an approximate trapezoid.

Optionally, the laminated edge reinforcing portion corresponds to the force application hole in shape.

Optionally, the laminated edge reinforcing portion and the laminated edge are thermocompression-bonded.

Optionally, a material of the laminated edge reinforcing portion is the same as a material of the lamination.

Optionally, the laminated edge reinforcing portion is made of a rubber material.

Optionally, the bag sheet and the lamination each have a thickness of 0.3 mm to 0.8 mm.

Preferably, the bag sheet and the lamination each have the thickness of 0.4 mm to 0.5 mm.

Preferably, the bag sheet and the lamination each have the thickness of 0.45 mm.

Optionally, the laminated edge reinforcing portion has a thickness of 0.1 mm to 0.3 mm.

Preferably, the laminated edge reinforcing portion has the thickness of 0.2 mm.

Optionally, the one-way valve includes a valve body, a sealing cover, and a flexible connecting portion; the valve body is fixedly provided in the valve hole, and allows unidirectional flow from inside to outside; the sealing cover is connected to the valve body through the flexible connecting portion; and the sealing cover can be configured to seal an air outlet of the valve body.

Optionally, the valve body includes a valve seat and a valve disc; the valve seat is fixedly provided in the valve hole, and an outlet chamber is formed in the valve seat; the air outlet is formed in a top of the outlet chamber; a communicating hole communicating with an interior of the bag body is formed in a bottom of the outlet chamber; and the valve disc is movably provided in the outlet chamber, and can be configured to block the communicating hole under an air pressure outside the bag body.

Optionally, a side of the sealing cover away from the flexible connecting portion is provided with a holding portion; and the holding portion extends along a direction away from the flexible connecting portion.

In the present disclosure, two sides of the compression bag are respectively provided with the inwardly folded folding portions. Through expansion and contraction of the folding portions, flexible storage space can be provided for the clothing in the bag. Moreover, the sealing strip is further fixedly provided on the compression bag. The sealing strip can be configured to selectively open the elongated hole to take and place the clothing conveniently, or seal the elongated hole to prevent outside air from entering the compression bag. The one-way valve allows unidirectional flow from inside to outside, ensuring that air is evacuated to the outside, and the outside air is prevented from entering the compression bag upon evacuation, keeping the interior of the compression bag at a low pressure.

Furthermore, a bag body of the compression bag is a cylindrical structure before two ends of the bag body are sealed. At two sides of the bag body, the folding portions for changing a volume through expansion and contraction and the bag sheets connected between the folding portions are all obtained by folding different parts of the same bag body. Only the two ends of the bag body are provided with an opening. After the bag body is sealed, the laminated edge is only formed at the end of the bag body. Compared with the spliced bag body in the related art, the present disclosure can effectively improve airtightness of the compression bag. Besides, an edge of at least one end of the bag body is sealed by thermocompression to form the laminated edge. This prevents adhesive failure, water seepage, air leakage and the like of the adhesion solution, and further ensures the airtightness of the compression bag, thereby ensuring storage efficiency as well as moisture-proof, mildew-resistant and anti-odor effects of the compression bag.

: bag body,: bag sheet,: light-transmissive sheet,: connection sheet,: folding portion,: lamination,: laminated edge,: sealing strip,: slider,: first teeth set,: second teeth set,: first connection sheet,: second connection sheet,: one-way valve,: valve body,: sealing cover,: holding portion,: flexible connecting portion,: viewing window,: force application hole,: laminated edge reinforcing portion,: sheet material,: elongated hole, and: valve hole.

The embodiments of the present disclosure are described below in detail. Examples of the embodiments are shown in the drawings. The same or similar numerals represent the same or similar elements or elements having the same or similar functions throughout the specification. The embodiments in implementations are only used to explain the present disclosure, and should not be construed as a limitation to the present disclosure.