A composite material for making a vacuum compression bag

Abstract

The application provides a composite material for manufacturing a vacuum compression bag, which comprises a fabric layer and a heat-sealable film which is compounded below the fabric layer, the fabric of the fabric layer is a plain weave cloth, the warp and weft filament fineness of the fabric is 50D-90D (Dalton), the T number of the fabric is 75-125 per square centimeter, and the thickness of the film is 0.03-0.1 mm. The composite material for manufacturing a vacuum compression bag of the application adopts the compounding of the plain weave cloth and the film, combines the wear resistance and softness of the plain weave cloth, simultaneously, the inner layer is compounded with the heat-sealable film, so that the bag manufacturing can be carried out through heat sealing, thereby ensuring the sealing property of the heat-sealed edge. The vacuum compression bag prepared by using the composite material is wear-resistant and soft, and simultaneously has the heat-sealed edge and sealing function of the ordinary compression bag.

Description

Technical Field

[0001] This invention relates to a composite material for manufacturing vacuum compression bags. Background Technology

[0002] Currently, the compression bags sold on the market are generally made of composite films, which are formed by laminating two layers of film. The outer layer of the composite film is usually a high-strength, heat-resistant film, while the inner layer is usually a material with a low melting point that is easy to heat-seal. The advantages of this composite material are: good strength, high heat-sealing strength, compression bags that are not prone to edge bursting, and the bags can be made transparent, making the contents clearly visible. However, it also has some disadvantages, such as: the film has a strong plastic feel and poor tactile experience; the film has poor scratch resistance and is easily torn by sharp objects; its folding resistance is also relatively weak; the material is prone to aging and has a short service life.

[0003] Given the aforementioned drawbacks of compression bags made from composite membrane materials, many people choose to replace existing compression bags with storage bags made of fabric that has a good feel, soft touch, and good wear resistance to store clothes. However, fabric can only be sewn by machine, and machine-sewn bags will have needle holes, causing air leakage and failing to achieve a sealing effect. Therefore, they still take up a lot of space when storing clothes and cannot fulfill the function of compression bags in compressing and storing the items inside.

[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 this invention is to overcome the shortcomings of the prior art and provide a wear-resistant, soft and heat-sealable composite material for making vacuum compression bags. The fabric layer and film of this composite material can be firmly bonded together, which can fully meet the material requirements for making vacuum compression bags.

[0006] The objective of this invention is achieved through the following technical solution:

[0007] A composite material for making vacuum compression bags, characterized in that it comprises a fabric layer and a heat-sealable film laminated below the fabric layer, wherein the fabric layer is made of woven fabric, the warp and weft filament fineness of the fabric is 50D to 90D (Dalton), the T number of the fabric is 75 to 125 threads / cm², and the thickness of the film is 0.03 to 0.1 mm.

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

[0009] The thickness of the film is usually selected from 0.03 to 0.1 mm. Films with a thickness of less than 0.03 mm have low strength and are easy to break during heat sealing, resulting in low heat sealing strength and easy damage and air leakage. Films with a thickness greater than 0.1 mm make the bag material feel hard and have a poor user experience.

[0010] The woven fabric described in this invention has a plain weave or twill weave. This ensures that the fabric has almost no tensile elasticity, guaranteeing good strength after the fabric is laminated with the film.

[0011] In this invention, the warp density of the fabric is 45-80 threads / cm, and the weft density is 30-45 threads / cm.

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

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

[0014] Nylon fabric, also known as nylon fiber fabric, is made by drawing nylon material into very fine fibers and then weaving them into cloth. The fabric has good abrasion resistance.

[0015] The fabric of this invention is made of polyester or nylon, which has the advantages of being soft to the touch as other fabrics, and is also highly durable and wrinkle-resistant, thus meeting the needs of consumers.

[0016] The preferred fabric layer is a 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 to have good heat-sealing performance and good strength. PE film usually has good heat-sealing performance, while nylon has good strength. Combining the two brings out 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 in this invention for making vacuum compression bags is a composite of woven fabric and film, which combines the advantages of woven fabric in terms of wear resistance and softness, while 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 both wear-resistant and soft, and also has the heat-sealing edge and sealing function of ordinary compression bags.

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

[0022] Example

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

[0024] The experiment found that the composite materials prepared by combining plain weave nylon fabric, twill weave polyester fabric, or twill weave nylon fabric with films of 0.03-0.1 mm thickness showed little difference in heat-sealing strength test results, and all had similar test results. Therefore, no additional test data was listed.

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

[0026]

[0027] Note:

[0028] 1. Fabric T count is within 1 square centimeter, which is the sum of the number of warp and weft yarns, and the unit is yarns / square centimeter;

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

[0030] 3. In the table, “\” indicates that the sample with the modified parameter is difficult to produce from a technological standpoint and was not tested.

[0031] 4. The testing equipment for heat seal strength in the table above 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 1.5s, pressure 500KPa);

[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 15mm according to the test requirements;

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

[0037] According to the test results in Table 1, when both D and T are very small, the heat-sealing strength of the composite material is very low. This is because the yarn diameter and yarn count are very small, resulting in large pores in the fabric and low composite strength between the fabric and the film, thus 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, resulting in a large gap between adjacent yarns, causing low composite strength between the fabric and the film, which affects 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 sealing production requirements, the small yarn diameter makes the fabric prone to tearing, and the smaller D is, the higher the production cost of the fabric. When D is very large and T is very large, the process requirements for the fabric are extremely high, and fabrics with these parameters are difficult to achieve in terms of process.

[0038] Comparative analysis shows that, under suitable D and T conditions, as shown in Table 1 (i.e., fabric T of 75–125 threads / cm² and yarn D of 50–90D), the fabric porosity is suitable, resulting in good bonding strength after adhesive application and high composite strength between the fabric and the film. Therefore, composite materials made from fabrics of this specification can fully meet the production requirements of vacuum compression bags.

Claims

1. A composite material for manufacturing vacuum compression bags, characterized in that... The product includes a fabric layer and a heat-sealable film laminated beneath the fabric layer. The fabric layer is a plain or twill woven fabric with a warp and weft filament fineness of 50D to 90D and a T-count of 75 to 125 threads / cm². The film has a thickness of 0.03 to 0.1 mm and is a composite of PE film and nylon. The fabric layer and the film are laminated together, enabling the composite material to be heat-sealed to form a durable, soft, and heat-sealed bag for storing clothing, combining the heat-sealing edge and sealing function of a regular compression bag.

2. The composite material for manufacturing vacuum compression bags according to claim 1, characterized in that... The material of the fabric layer is selected from polyester or nylon fabric.

3. The composite material for manufacturing vacuum compression bags according to claim 2, characterized in that... The fabric layer is a polyester fabric with a fineness of 50D*50D and a density of 75 threads / cm*42 threads / cm.

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