Composite material for manufacturing vacuum compression bag

Abstract

The present invention provides a composite material for manufacturing a vacuum compression bag. The composite material comprises a fabric layer and a heat-sealable film compounded below the fabric layer; the fabric of the fabric layer is woven fabric; the fineness of warp and weft filaments of the fabric is 50 D-90 D (Dalton); the T number of the fabric is 75-125 yarns / square centimeter; and the thickness of the film is 0.03-0.1 mm. According to the composite material for manufacturing a vacuum compression bag of the present invention, the woven fabric and the film are compounded together, such that the advantages of wear resistance and softness of the woven fabric are combined; in addition, the heat-sealable film is compound on the inner layer, such that bag manufacturing can be conducted by means of heat sealing, thereby ensuring the sealing performance of a heat-seal edge. Vacuum compression bags prepared from the composite material are wear-resistant and soft, and also have heat-seal edges and sealing functions of common compression bags.

Description

Composite material for making vacuum compression bags Technical Field

[0001] The invention relates to a composite material for making vacuum compression bags. Background Art

[0002] Currently, compression bags sold on the market are generally made of a composite film, made by laminating two layers of film. The outer layer of the composite film is typically a high-strength, heat-resistant film, while the inner layer is typically a low-melting-point, heat-sealing material. The advantages of this composite material include: high strength and heat-sealing strength, making the resulting compression bag less prone to cracking, and the ability to be made transparent, allowing for easy visibility of the contents. However, it also has certain disadvantages, including: a strong plastic feel and unpleasant tactile feel; poor scratch resistance, making it easily damaged by sharp objects; relatively weak folding resistance; and the material's rapid aging, resulting in a short service life.

[0003] Due to the above-mentioned shortcomings of compression bags made of composite film materials, many people choose storage bags made of fabrics with good hand feel, soft touch and good wear resistance to replace existing compression bags to store clothes. However, fabrics can only be sewn by sewing, and bags sewn by machine needles will have pinholes, causing air leakage and failing to achieve a sealing effect. Therefore, a large amount of space will still be occupied when storing clothes, and the compression bag will not play the role of compressing and storing items in the bag.

[0004] Therefore, it is particularly important to invent a composite material that is wear-resistant, soft, has high heat-sealing strength, and can be used to make vacuum compression bags. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a wear-resistant, soft and heat-sealable composite material for making vacuum compression bags. The fabric layer and film of the composite material can be firmly composited together, which can fully meet the material requirements for making vacuum compression bags.

[0006] The purpose of the present invention is achieved through the following technical solutions:

[0007] A composite material for making vacuum compression bags, characterized by comprising a fabric layer and a heat-sealable film composited below the fabric layer, wherein the fabric of the fabric layer is a woven fabric, the fineness of the warp and weft filaments of the fabric is 50D to 90D (Dalton), the T number of the fabric is 75 to 125 threads per square centimeter, and the thickness of the film is 0.03 to 0.1 mm.

[0008] In the present invention, the composite of the fabric layer and the film combines the wear resistance and softness of the fabric. At the same time, since the inner layer is composited with the heat-sealable film, the bag can be made by heat sealing, thereby ensuring the sealing of the heat-sealed edge.

[0009] The thickness of the film is usually selected to be 0.03~0.1mm. Films with a thickness below 0.03mm have low strength and are easily welded and broken during heat sealing. The heat sealing strength is low and it is easy to break and leak. Films with a thickness greater than 0.1mm make the bag material feel hard and the user experience is not good.

[0010] The woven fabric of the present invention is a plain weave or a twill weave, which ensures that the fabric has almost no stretchability and has good strength after being laminated with the film.

[0011] In the present invention, the warp density of the fabric is 45 to 80 yarns / cm, and the weft density is 30 to 45 yarns / cm.

[0012] The material of the fabric layer is polyester fabric or nylon fabric.

[0013] Polyester, also known as polyester, is an important type of synthetic fiber. Polyester fabric is a common chemical fiber used in daily clothing. Its greatest advantages are its excellent wrinkle resistance and shape retention.

[0014] Nylon fabric is commonly known as nylon fiber fabric. It is made by pulling nylon material into very fine fibers and then weaving it into cloth. The fabric has good wear resistance.

[0015] The fabric of the present invention is made of polyester fabric or nylon fabric, which has the advantages of soft touch of other fabrics and is also very wear-resistant and wrinkle-resistant, and can well meet the needs of consumers.

[0016] The fabric layer is preferably made of polyester fabric with a fineness of 50D*50D and a density of 75 threads / cm*42 threads / cm.

[0017] The film is a composite film of PE film and nylon.

[0018] The film needs good heat sealing performance and good strength. Usually PE film has good heat sealing performance, while nylon has good strength. The combination of the two can reflect the advantages of both materials, that is, it has a good feel and can be heat-sealed to make bags.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The composite material used to make vacuum compression bags of the present invention is a composite of woven fabric and film, combining the wear resistance and softness of woven fabric. At the same time, the inner layer is composited with a heat-sealable film, so that the bag can be made by heat sealing, thereby ensuring the sealing of the heat-sealed edge. The vacuum compression bag made using this composite material is not only wear-resistant and soft, but also has the heat-sealed edge and sealing functions of ordinary compression bags.

[0021] 2. The fabric layer and film of the composite material of the present invention can be firmly combined together, which can fully meet the material requirements for making vacuum compression bags. DETAILED DESCRIPTION

[0022] Example

[0023] In this embodiment, different fabrics with a T count of 55 to 145 threads / cm² and a yarn count of 30 to 120D were selected, as shown in Table 1. Table 1 uses a polyester fabric with a plain weave and a film with a thickness of 0.03-0.1 mm to prepare the composite material for making vacuum compression bags of the present invention. The prepared composite material was then tested to measure its heat seal strength, and the results are recorded as shown in Table 1. The unit of heat seal strength is N.

[0024] The tests found that the heat seal strength test results of composite materials prepared by combining plain weave nylon fabric, twill weave polyester fabric, or twill weave nylon fabric with a 0.03-0.1mm thick film were similar, and therefore the test data are not presented separately.

[0025] Table 1 Test results of composite materials with different fabric parameters

[0026]

[0027] Note:

[0028] 1. The T number of the fabric is within 1 square centimeter, which is the sum of the number of yarns in the warp and weft directions, and the unit is root / square centimeter;

[0029] 2. Yarn count D is the weight in grams of 9000 meters of yarn or fiber. It is also a fixed-length unit. The larger the weight, the thicker the yarn or fiber. The unit is D (Dalton).

[0030] 3. The “\” in the table indicates that the samples with modified parameters are difficult to realize from a technological point of view and have not been tested.

[0031] 4. The heat seal strength test equipment in the above table is a heat sealer and a tensile testing machine;

[0032] The test steps for heat seal strength in this embodiment are as follows:

[0033] (1) Adjust the heat sealer to the appropriate temperature, time, and pressure (temperature 190 degrees, time 1.5 seconds, pressure 500 kPa);

[0034] (2) Place the composite material to be tested on the heat sealer and start the instrument to perform heat sealing;

[0035] (3) Cut the heat-sealed material into strips with a width of 15 mm according to the test requirements;

[0036] (4) Place the sample on a tensile testing machine for tensile testing and measure the heat seal strength value.

[0037] According to the test results in Table 1, when D and T are very small, the heat sealing strength of the composite material is very low. This is because the yarn diameter is small and the yarn count density is very low, so the holes in the fabric are large, resulting in low composite strength between the fabric and the film, thereby reducing the heat sealing strength of the composite material; when D is very large and T is very small, the heat sealing strength of the composite material is also low. This is because the yarn diameter is very large and there is a large gap between two adjacent yarns, resulting in low composite strength between the fabric and the film, affecting the heat sealing strength of the composite material; when D is very small and T is very large, although the heat sealing strength of the composite material can meet the production requirements of sealing, the small yarn diameter will cause the fabric to tear easily, and the smaller D is, the higher the production cost of the fabric; when D and T are very large, the process requirements for the fabric are very high, and fabrics with such parameters are difficult to achieve in terms of technology.

[0038] Comparative analysis shows that when D and T are appropriate, as shown in Table 1, that is, when the fabric T number is 75-125 threads / square centimeter and the yarn count D number is 50-90D, the fabric has a relatively appropriate porosity, good composite firmness after gluing, and high composite strength between the fabric and the film. Therefore, composite materials made with this fabric specification can fully meet the production requirements of vacuum compression bags.

Claims

1. A composite material for making a vacuum compression bag, characterized in that The invention comprises a fabric layer and a heat-sealable film which is compounded under the fabric layer. The fabric of the fabric layer is woven fabric, the fineness of the filaments in the warp and weft directions of the fabric is 50D-90D, the T number of the fabric is 75-125 strands / square centimeter, and the thickness of the film is 0.03-0.1mm.

2. The composite material for making a vacuum compression bag according to claim 1, characterized in that The woven fabric is a plain weave or a twill weave. 3..The composite material for making a vacuum compression bag according to claim 2, characterized in that The material of the fabric layer is polyester fabric or nylon fabric. 4.. The composite material for making a vacuum compression bag according to claim 3, characterized in that The fabric layer is a polyester fabric with a fineness of 50D*50D and a density of 75 strands / cm*42 strands / cm.

5. The composite material for making a vacuum compression bag according to claim 1, characterized in that The film is a composite film of PE film and nylon.

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