阅读说明：本技术 一种无纺布包装材料及其制备方法和包装袋 (Non-woven fabric packaging material, preparation method thereof and packaging bag ) 是由 李建全 纪华 周荣洪 詹德新 李芳颖 成宜 于 2020-06-19 设计创作，主要内容包括：本发明涉及包装材料技术领域,尤其涉及一种无纺布包装材料的制备方法,其主要包括以下几个步骤：S1制备无纺布材料、S2向所述无纺布上添加拒水拒油整理剂,并依次进行烘干和焙烘处理后,收卷、S3对S2中收卷后的无纺布上添加硬挺整理剂后,依次进行烘干和焙烘处理、S4、对S3中焙烘后的无纺布依次进行轧光和单面涂层处理后,收卷,即可得到所述包装材料。采用本发明所述制备方法得到的所述包装材料,具有易降解、拒水拒油效果好、表面光滑、手感舒适、美观性强和环保性能强等优点,且包装材料表层的涂层能有效提高无纺布的密封性,提高其作为包装材料使用的实用性,进而可提高包装袋的经济效益。(The invention relates to the technical field of packaging materials, in particular to a preparation method of a non-woven fabric packaging material, which mainly comprises the following steps: s1 preparing a non-woven fabric material, S2 adding a water-repellent and oil-repellent finishing agent to the non-woven fabric, drying and baking the non-woven fabric in sequence, rolling the non-woven fabric, S3 adding a stiffening finishing agent to the non-woven fabric rolled in the S2, drying and baking the non-woven fabric in sequence, S4, calendaring and processing a single-surface coating on the non-woven fabric baked in the S3 in sequence, and rolling the non-woven fabric to obtain the packaging material. The packaging material obtained by the preparation method has the advantages of easy degradation, good water and oil repellent effect, smooth surface, comfortable hand feeling, strong aesthetic property, strong environmental protection performance and the like, and the coating on the surface layer of the packaging material can effectively improve the sealing property of the non-woven fabric, improve the practicability of the non-woven fabric as the packaging material and further improve the economic benefit of the packaging bag.)

1. The preparation method of the non-woven fabric packaging material is characterized by comprising the following steps of:

s1, selecting a cotton material as a raw material, and sequentially carrying out cotton grabbing, impurity separation, pre-cleaning, carding, lapping and spunlace treatment on the cotton material to obtain a non-woven fabric;

s2, adding a water-repellent and oil-repellent finishing agent to the non-woven fabric, drying and baking the non-woven fabric in sequence, and then rolling the non-woven fabric, wherein the mass ratio of solute in the water-repellent and oil-repellent finishing agent to the non-woven fabric is 1-10: 100;

s3, adding a stiffening finishing agent to the non-woven fabric rolled in the S2, and then sequentially drying and baking, wherein the mass ratio of solute in the stiffening finishing agent to the non-woven fabric is 3-30: 100;

and S4, sequentially calendering and processing a single-surface coating on the baked non-woven fabric in the S3, and rolling to obtain the packaging material.

2. The method for preparing a non-woven fabric packaging material as claimed in claim 1, wherein the cotton material is one of absorbent cotton, non-absorbent raw cotton, dyed cotton and absorbent cotton or mixed cotton of non-absorbent raw cotton, the weight percentage of the dyed cotton in the mixed cotton is 10-50 wt%, and the ratio of the absorbent cotton or the non-absorbent raw cotton is 50-90 wt%.

3. The method for preparing the non-woven fabric packaging material according to claim 1, wherein the concentration of the water-repellent and oil-repellent finishing agent is 15-100 g/L.

4. The method for preparing the non-woven fabric packaging material as claimed in claim 1, wherein the concentration of the stiffening finishing agent is 50-300 g/L.

5. The method for preparing the non-woven fabric packaging material as claimed in claim 1, wherein the drying treatment temperature in S2 and S3 is 80-120 ℃, the drying treatment time is 1-3min, the drying treatment temperature is 120-170 ℃, and the drying treatment time is 1-5 min.

6. The method for preparing the non-woven fabric packaging material as claimed in claim 1, wherein the temperature condition of the calendering treatment in S4 is 130-250 ℃, the pressure condition is 40-500N/mm, and the speed condition is 10-150 m/min.

7. A packaging material obtained by the production method according to any one of claims 1 to 6.

8. The packaging bag is characterized by comprising a packaging bag body (10), wherein the packaging bag body (10) is made of the packaging material as claimed in claim 7, the packaging bag body is of a hollow rectangular structure, the packaging bag body is horizontally arranged, a discharge hole (11) communicated with the interior of the packaging bag body is formed in the upper end of the packaging bag body, a fixing part (20) is arranged at the lower end of the packaging bag body (10), the fixing part (20) is used for fixing the lower end of the packaging bag body (10) at any position, an adjusting part is arranged on the packaging bag body (10), and the adjusting part is used for adjusting the size of the inner space of the packaging bag body (10).

9. The packaging bag according to claim 8, wherein the adjusting member is an elastic band (31), which has at least two fixed ends, and two fixed ends of the adjusting member are fixedly connected with the upper end of the packaging bag body (10), and one side of the movable end of the adjusting member, which is close to the packaging bag body (10), is provided with a pasting member, and the two side walls, which correspond to the pasting member and are opposite to the packaging bag body (10), are detachably connected.

10. The packaging bag according to claim 8, wherein the adjusting member is disposed on the side wall of the packaging bag body (10) at two opposite sides, the adjusting member is a clip chain self-sealing strip (32), and the convex edge portion (321) and the groove portion (322) of the clip chain self-sealing strip (32) are respectively disposed along the length direction of the side wall at the corresponding side and are vertically spaced.

Technical Field

The invention relates to the technical field of packaging materials, in particular to a non-woven fabric packaging material, a preparation method thereof and a packaging bag.

Background

The packaging material is used for manufacturing packaging containers, packaging decoration, packaging printing, packaging transportation and the like, and is used for meeting the product packaging requirements, in the field of production and manufacturing of cotton soft tissue or tissue packaging bags, most of the packaging materials for producing the packaging bags are plastic materials (plastic soft packaging bags) and hard paperboards (hard carton packaging), wherein the plastic soft packaging bags made of the plastic materials have the defect of difficult natural degradation, the plastic soft packaging bags are discarded as waste at will to pollute the environment, toxic gas is generated if the waste soft packaging bags are subjected to combustion treatment, the environmental pollution is also great, the environmental protection performance is poor, and the plastic raw materials are extracted from petroleum, so that the storage of limited petroleum resources becomes more tense. The hard paperboard material can be naturally degraded, but the consumption of trees in the production process is large, and a large amount of sewage is discharged in the paper-making process.

Disclosure of Invention

In view of the above, the invention provides a non-woven fabric packaging material, a preparation method thereof and a packaging bag.

The invention provides a preparation method of a non-woven fabric packaging material, which comprises the following steps:

s1, selecting a cotton material as a raw material, and sequentially carrying out cotton grabbing, impurity separation, pre-cleaning, carding, lapping and spunlace treatment on the cotton material to obtain a non-woven fabric;

s2, adding a water-repellent and oil-repellent finishing agent to the non-woven fabric, and rolling after drying and baking treatment in sequence;

s3, adding a stiffening finishing agent to the non-woven fabric rolled in the S2, and then sequentially drying and baking;

and S4, sequentially calendering and processing a single-surface coating on the baked non-woven fabric in the S3, and rolling to obtain the packaging material.

Further, the cotton material is one of absorbent cotton, non-absorbent raw cotton, dyed cotton and absorbent cotton or mixed cotton of the non-absorbent raw cotton, the weight percentage of the dyed cotton in the mixed cotton is 10-50 wt%, and the ratio of the absorbent cotton or the non-absorbent raw cotton is 50-90 wt%.

Further, the concentration of the water-repellent and oil-repellent finishing agent is 15-100 g/L.

Further, the concentration of the stiffening finishing agent is 50-300 g/L.

Furthermore, the drying temperature in S2 and S3 is 80-120 ℃, the drying time is 1-3min, the baking temperature is 120-170 ℃, and the baking time is 1-5 min.

Further, the temperature condition of the calendering treatment in S4 is 130-250 ℃, the pressure condition is 40-500N/mm, and the speed condition is 10-150 m/min.

A packaging material obtained by the above preparation method.

A packaging bag, comprising a packaging bag body, wherein the packaging bag body is made of the packaging material as claimed in claim 7, is of a rectangular structure with a hollow interior, is horizontally arranged, and is provided with a discharge hole communicated with the interior of the packaging bag body at the upper end thereof, a fixing part is arranged at the lower end of the packaging bag body, the fixing part is used for fixing the lower end of the packaging bag body at any position, an adjusting part is arranged on the packaging bag body, and the adjusting part is used for adjusting the size of the inner space of the packaging bag body.

Further, the regulating part is the elastic webbing, and it is equipped with two at least, and two the stiff end of regulating part all with wrapping bag body's upper end fixed connection, its expansion end is close to one side of wrapping bag body all is equipped with pastes the piece, and passes through paste the piece correspond with the connection can be dismantled to the relative both sides lateral wall of wrapping bag body.

Further, all be equipped with on the lateral wall of the relative both sides of wrapping bag body the regulating part, the regulating part is the clip chain from the strip, just protruding arris portion and the concave part that the strip was all followed to the clip chain from the strip all set up along the length direction who corresponds the lateral wall to interval distribution about respectively.

The technical scheme provided by the invention has the beneficial effects that: the non-woven fabric packaging material, the preparation method thereof and the packaging bag have the following advantages:

(1) the preparation method has the advantages of simple process steps, low production cost, high product yield and the like;

(2) the main body of the packaging material is cotton fiber, which is renewable and degradable, and is environment-friendly and strong in environmental protection performance. The coating on the surface layer of the packaging material can effectively improve the sealing property of the non-woven fabric and improve the practicability of the non-woven fabric as the packaging material;

(3) the packaging bag is easy to degrade, does not pollute the environment, can be used for conveniently extracting the cotton soft tissue or the paper extraction due to the structure of the fixing piece (20), solves the problem of material falling by combining the adjusting piece, further improves the convenience for extracting the cotton soft tissue or the paper extraction, and has the advantages of simple structure, strong practicability, good economic benefit, low production cost and the like.

Drawings

FIG. 1 is a flow chart of a method for preparing a nonwoven fabric wrapper in accordance with the present invention;

FIG. 2 is a schematic view of the construction of the package of the present invention;

FIG. 3 is a bottom view of the package of the present invention;

fig. 4 is a schematic structural view of the packing bag of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be further described with reference to the accompanying drawings.

Referring to fig. 1, an embodiment of the present invention provides a method for preparing a non-woven fabric packaging material, which mainly includes the following steps:

s1, selecting a cotton material as a raw material, and sequentially carrying out cotton grabbing, impurity separation, pre-cleaning, carding, lapping and spunlace treatment on the cotton material to obtain a non-woven fabric; the cotton material is one of absorbent cotton, non-absorbent raw cotton, dyed cotton and absorbent cotton or mixed cotton of the non-absorbent raw cotton, the weight percentage of the dyed cotton in the mixed cotton is 10-50 wt%, and the proportion of the absorbent cotton or the non-absorbent raw cotton is 50-90 wt%. The color of the non-woven fabric can be adjusted by adding the dyed cotton. Compared with the coloring mode of re-dyeing the spunlaced and formed non-woven fabric, the invention adopts the mode of adjusting the color of the non-woven fabric by adding the dyeing cotton, can realize corresponding technical effect by dyeing a small amount of cotton fiber, and has the advantages of energy saving and environmental protection. Here, it should be noted that the method for preparing a nonwoven fabric in the present invention is a prior art, and for example, the method for preparing a nonwoven fabric disclosed in the method for producing a medical dressing with an all-cotton nonwoven fabric in the patent of No. CN100340705 can be used as a specific example of the method for preparing a nonwoven fabric in the present invention, and therefore, the present invention is providedThe detailed preparation steps and process conditions are not repeated. Preferably, the gram weight of the non-woven fabric prepared by the invention is 25-200g/m²。

S2, rolling and drying the non-woven fabric obtained in the S1, and sequentially performing water and oil repellent, drying and baking treatment, and then rolling, wherein the specific operation method comprises the steps of adding a water and oil repellent finishing agent to the all-cotton spunlace non-woven fabric, and then performing drying and baking treatment, wherein the concentration of the water and oil repellent finishing agent is 15-100g/L, the adding mode is one of impregnation, spraying, roller coating, blade coating or foam finishing, the drying treatment temperature is 80-120 ℃, the drying treatment time is 1-3min, the baking treatment temperature is 120-170 ℃, and the baking treatment time is 1-5 min. The mass ratio of solute in the water-repellent and oil-repellent finishing agent to the non-woven fabric is as follows: 1-10:100. It should be noted that the water-repellent and oil-repellent, drying and baking processes are all applicable to the prior art.

S3, sequentially stiffening, drying and baking the non-woven fabric rolled in the S2, wherein the stiffening treatment specifically comprises the following operations: the stiffening finishing agent is added to the non-woven fabric through the adding mode of dipping, spraying, roller coating, blade coating or foam finishing, the stiffening finishing agent in the invention can be one of natural polymer stiffening finishing agents (such as starch, dextrin, sodium alginate, vegetable gum, animal glue and the like), natural modified polymer stiffening finishing agents (such as methylcellulose, carboxymethylcellulose and the like) or synthetic polymer stiffening finishing agents (such as polyvinyl alcohol, polyacrylamide, thermoplastic or thermosetting synthetic resin and the like), the concentration of the stiffening finishing agent is 50-300g/L, in the step, the drying treatment temperature is 80-120 ℃, the time is 1-3min, the drying treatment temperature is 120-170 ℃, and the time is 1-5 min. Wherein the mass ratio of the solute in the stiffening finishing agent to the non-woven fabric is 3-30: 100.

S4, sequentially carrying out calendaring and single-surface coating treatment on the baked non-woven fabric in the S3, and then rolling to obtain the packaging material, wherein the calendaring temperature is 130-250 ℃, the pressure is 40-500N/mm, and the speed is 10-150 m/min; the coating is one of a polyethylene film layer, an EVA hot melt adhesive film layer or a polyurethane coating, the thickness of the coating is 0.01-0.1mm, and the coating method of the coating is one of a scraper, a rotary screen, a roller, a spinning nozzle, a film spraying method or a roller coating method. It should be noted that the calendering and coating process of the present invention is applicable to the prior art.

< example 1>

S1, selecting non-degreased raw cotton as a raw material, and sequentially carrying out cotton grabbing, impurity separation, pre-cleaning, carding, lapping and spunlace treatment on the cotton to obtain the cotton with the gram weight of 50g/m²The nonwoven fabric of (1);

s2, after the non-woven fabric obtained in the S1 is rolled and dried, adding a Herst fluorine-containing water-repellent and oil-repellent finishing agent to the non-woven fabric in a dipping mode, after the dipped non-woven fabric is squeezed and rolled to remove the redundant Herst fluorine-containing water-repellent and oil-repellent finishing agent, drying the non-woven fabric for 1min at the temperature of 100 ℃, then baking the non-woven fabric for 1min at the temperature of 150 ℃, and then rolling, wherein the concentration of the Herst fluorine-containing water-repellent and oil-repellent finishing agent is 25g/L, and the mass ratio of solute in the Herst fluorine-containing water-repellent and oil-repellent finishing agent to the non-woven fabric is 2.5: 100;

s3, adding a modified melamine resin stiffening finishing agent to the non-woven fabric rolled in the S2 in an impregnation mode for stiffening treatment, carrying out squeezing and rolling on the impregnated non-woven fabric to remove the redundant stiffening finishing agent, then drying for 1min at the temperature of 100 ℃, and then carrying out baking treatment for 1min at the temperature of 150 ℃, wherein the concentration of the modified melamine resin in the stiffening finishing agent is 100g/L, and the mass ratio of the modified melamine resin in the stiffening finishing agent to the non-woven fabric is 9: 100;

and S4, calendering the non-woven fabric baked in the S3 under the process conditions of 160 ℃, 200N/mm pressure and 50m/min hot rolling speed, coating a polyethylene film with the thickness of 0.075mm on one side of the calendered non-woven fabric by adopting a film coating method, finishing single-side coating treatment, and rolling to obtain the packaging material.

The main body of the packaging material prepared by the implementation is cotton fiber, can be regenerated and degraded, is environment-friendly, has strong environmental protection performance, and also has the advantages of good water and oil repellent effect, smooth surface, comfortable hand feeling and the like, and the coating on the surface layer of the packaging material can effectively improve the sealing property of the non-woven fabric and improve the practicability of the packaging material. In addition, the polyethylene film coating is also an environment-friendly material, is nontoxic and odorless, and can achieve the purpose of rapid degradation by adding a degradation agent.

< example 2>

S1, selecting absorbent cotton as a raw material, and sequentially carrying out cotton grabbing, impurity separation, pre-cleaning, carding, lapping and spunlace treatment on the cotton to obtain the absorbent cotton with the gram weight of 60g/m²The nonwoven fabric of (1);

s2, after the non-woven fabric obtained in the step S1 is rolled and dried, adding a Herst fluorine-containing water-repellent and oil-repellent finishing agent onto the non-woven fabric in a spraying mode, and carrying out water-repellent and oil-repellent treatment, wherein the concentration of the Herst fluorine-containing water-repellent and oil-repellent finishing agent is 30g/L, the mass ratio of solute in the Herst fluorine-containing water-repellent and oil-repellent finishing agent to the non-woven fabric is 3:100, the non-woven fabric subjected to water-repellent and oil-repellent treatment is dried at the temperature of 110 ℃ for 2min, then is dried at the temperature of 160 ℃ for 1.5min, and then is rolled;

s3, adding a polyvinyl acetate stiffening finishing agent to the rolled non-woven fabric in the S2 in a spraying mode, and carrying out stiffening treatment, wherein the concentration of polyvinyl acetate in the stiffening finishing agent is 150g/L, the mass ratio of polyvinyl acetate in the stiffening finishing agent to the non-woven fabric is 14:100, the non-woven fabric after the stiffening treatment is dried at the temperature of 110 ℃ for 2min, and then is dried at the temperature of 160 ℃ for 2 min;

and S4, calendering the non-woven fabric baked in the S3 under the process conditions of 180 ℃ of temperature, 240N/mm of pressure and 45m/min of hot rolling speed, coating an EVA coating with the thickness of 0.05mm on one side of the calendered non-woven fabric by adopting a roller coating method to complete single-side coating treatment, and rolling to obtain the packaging material.

< example 3>

S1, selecting mixed cotton of 30 wt% of blue dyed cotton and 70 wt% of non-degreased raw cotton as a raw material, and sequentially scratching the cotton and sundriesSeparating, pre-cleaning, carding, lapping and spunlacing to obtain the product with a gram weight of 80g/m²The nonwoven fabric of (1);

s2, after the non-woven fabric obtained in the S1 is rolled and dried, adding a Herst fluorine-containing water-repellent and oil-repellent finishing agent onto the non-woven fabric in a roll coating mode, and carrying out water-repellent and oil-repellent treatment, wherein the concentration of the Herst fluorine-containing water-repellent and oil-repellent finishing agent is 45g/L, the mass ratio of solute in the Herst fluorine-containing water-repellent and oil-repellent finishing agent to the non-woven fabric is 4:100, the non-woven fabric after the water-repellent and oil-repellent treatment is dried at the temperature of 120 ℃ for 2min, then is dried at the temperature of 160 ℃ for 1.5min, and then is rolled;

s3, adding a polyacrylate stiffening finishing agent to the nonwoven fabric rolled in the S2 in a dipping mode, carrying out stiffening treatment, wherein the concentration of polyacrylate is 160g/L, the mass ratio of polyacrylate to the nonwoven fabric in the stiffening finishing agent is 15:100, drying the nonwoven fabric subjected to the stiffening treatment for 2min at the temperature of 120 ℃, and then baking the nonwoven fabric for 2.5min at the temperature of 160 ℃;

and S4, calendering the non-woven fabric baked in the S3 under the process conditions of 180 ℃ of temperature, 260N/mm of pressure and 40m/min of hot rolling speed, coating a polyurethane coating with the thickness of 0.1mm on one side of the calendered non-woven fabric by adopting a blade coating method, finishing single-side coating treatment, and rolling to obtain the packaging material.

The packaging material prepared by the embodiment has the advantages that the attractiveness of the packaging material is improved by the dyed cotton, the dyed cotton can be used as a packaging material raw material for producing packaging bags with high requirements on appearance, such as handbag, and if the dyed cotton is used as a packaging material raw material for producing handbag, the preparation process of the packaging material can be free from coating treatment. The packaging material prepared by the embodiment improves the economic performance of the packaging material, and in addition, the blue dyed cotton used in the embodiment can be replaced by dyed cotton with other colors, so that the purpose of adjusting the color of the non-woven fabric is achieved.

As shown in fig. 2-3, a non-woven fabric packaging bag comprises a packaging bag body 10, wherein the packaging bag body 10 is made of the packaging material prepared by the above preparation method, and is of a rectangular structure with a hollow interior, and is horizontally arranged, the upper end of the packaging bag body is provided with a discharge hole 11 communicated with the interior of the packaging bag body, the lower end of the packaging bag body 10 is provided with a fixing part 20, the fixing part 20 is used for fixing the lower end of the packaging bag body 10 at any position, the upper end of the packaging bag body 10 is at least provided with two adjusting parts, the fixed ends of the two adjusting parts are fixedly connected with the upper end of the packaging bag body 10, the movable ends of the two adjusting parts correspond to the side walls on two sides opposite to the packaging bag body 10 and are detachably connected, and the.

In the present invention, the soft tissue and the paper tissue are filled in the packaging bag body 10, when in use, the packaging bag body 10 is fixed at any position such as a table top or a wall surface through the fixing member 20, and the packaging bag cannot move at will under the action of the fixing member 20, so that when the soft tissue or the paper tissue is extracted through the discharge port 11, the phenomenon of lifting the packaging bag does not occur, and the convenience of extracting the soft tissue or the paper tissue is improved, and when the amount of the soft tissue or the paper tissue in the packaging bag body 10 is less and less, the size of the inner space of the packaging bag body 10 is compressed through the adjusting member, so that the inner space of the packaging bag body 10 becomes smaller, which can effectively prevent the soft tissue or the paper tissue from falling back into the packaging bag body 10. In addition, the packaging bag is different from the traditional packaging bag which adopts a plastic material or a hard paperboard material as a production raw material, the non-woven fabric material is adopted as the production raw material of the packaging bag, and the easy degradation performance of the all-cotton spunlace non-woven fabric is utilized to realize the easy degradation of the packaging bag, so that the purpose of improving the environmental protection performance of the packaging bag is achieved.

In the above embodiment, the fixing members 20 are two double-sided tapes or removable tapes, and the two fixing members 20 are disposed along the width direction of the package body 10 and are respectively spaced along the length direction of the package body 10.

In the invention, the double-sided adhesive tape or the removable adhesive tape has the advantages of good fixing effect, simple operation, low implementation cost and the like. Preferably, the fixing member 20 is a double-sided tape.

As an embodiment of the adjusting member of the present invention, the adjusting member is an elastic band 31, and an adhesive member (not shown) is disposed at a side of the movable end of the elastic band 31 close to the packaging bag body 10, and under the action of the adhesive member, the movable end of the elastic band 31 is detachably connected to the corresponding side wall of the packaging bag body 10.

In the present invention, there are 4 elastic bands 31, and the 4 elastic bands 31 may be distributed two by two symmetrically or may be distributed uniformly, and if they are distributed two by two symmetrically, the movable ends of the 2 elastic bands 31 located on the same side are all detachably connected to the corresponding side wall of the packaging bag body 10, and if they are distributed uniformly, the movable ends of the elastic bands 31 are respectively detachably connected to the four side walls of the packaging bag body 10. The adjusting piece with the elastic structure can realize the rapid compression of the inner space of the packaging bag body 10 under the action of the elastic force, and has the advantage of convenient operation. The pasting piece is a double-sided adhesive tape or a magic tape, and the double-sided adhesive tape or the magic tape has the advantages of convenience in disassembly and assembly, low implementation cost, good fixing effect and the like. Preferably, the adhesive member of the present invention is a double-sided tape.

As shown in fig. 4, as another embodiment of the adjusting member of the present invention, the adjusting member is disposed on the side walls of the package bag body 10 at two opposite sides, the adjusting member is a clip chain self-sealing strip 32, and the rib portion 321 and the groove portion 322 of the clip chain self-sealing strip 32 are disposed along the length direction of the side wall at the corresponding side and are respectively distributed at intervals up and down.

In the present invention, the operation of the adjusting member for adjusting the inner space of the package body 10 is to combine the convex edge 321 on the upper side and the concave groove 322 on the lower side, so that the side area of the package body 10 is reduced, and the inner space of the package body 10 is compressed. The adjusting piece with the structure of the clip chain self-sealing strip 32 not only has the advantages of simple operation, strong practicability and the like, but also can achieve the purpose of simplifying the structure of the packaging bag by the clip chain self-sealing strip 32 compared with the adjusting piece with the structure of the elastic belt 31, thereby improving the aesthetic property of the packaging bag.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

The features of the embodiments and embodiments described herein above may be combined with each other without conflict.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.