A luggage material with clear texture and not easy to fray and its preparation method

Abstract

The present invention relates to the technical field of luggage materials, and particularly relates to a luggage material with clear texture and not easy to fray and a preparation method thereof. The preparation method of the luggage material with clear texture and not easy to fray includes the following steps: S1. Apply sizing to a base cloth with mesh holes twice to obtain a primary base cloth; S2. Remove the sizing in the mesh holes of the primary base cloth to obtain a secondary base cloth; S3. Composite diaphragms on both sides of the secondary base cloth by a hot pressing process to obtain the luggage material. The luggage material prepared by the present invention has clear texture on the surface of the base cloth, and has excellent hand feeling, resilience and stiffness, and can effectively improve the quality of the luggage prepared from the luggage material.

Description

Technical Field

[0001] The present invention relates to the technical field of luggage materials, and particularly relates to a luggage material with clear texture and not easy to fray at the edges and a preparation method thereof. Background Art

[0002] Luggage materials usually have a film laminated on the surface of the base fabric to improve the performance of the luggage materials, such as flame retardancy, weather resistance, hydrophobicity, etc. For example, the luggage fabric and its production process disclosed in Patent CN114395184A obtain a laminated material by mixing and melting various materials and rolling it onto a polyester Oxford fabric to produce a luggage fabric with good weather resistance. The existing lamination processes mainly include coating forming, direct hot pressing or bonding and hot pressing using adhesives (such as PU paste or PVC paste, etc.). In the traditional bonding and hot pressing process, a large amount of adhesive is required to adhere the film to achieve a high peel strength. However, a large amount of adhesive will penetrate into the base fabric tissue during the hot pressing process, resulting in unclear texture of the finished luggage material. Therefore, there is an urgent need for a bonding and hot pressing process that can improve the texture clarity of luggage materials. Summary of the Invention

[0003] In order to overcome the defects of the above-mentioned prior art, the technical problem to be solved by the present invention is: to provide a preparation method of a luggage material that can improve the clarity of the luggage material, and a luggage material prepared by the preparation method.

[0004] In order to solve the above technical problem, the technical solution adopted by the present invention is: a preparation method of a luggage material with clear texture and not easy to fray at the edges, comprising the following steps:

[0005] S1. Apply paste to the base fabric with mesh holes twice to obtain a primary base fabric;

[0006] S2. Remove the paste in the mesh holes of the primary base fabric to obtain a secondary base fabric;

[0007] S3. Composite diaphragms on both sides of the secondary base fabric by a hot pressing process to obtain the luggage material.

[0008] And provide a luggage material prepared by the preparation method of the above-mentioned luggage material with clear texture and not easy to fray at the edges.

[0009] The beneficial effect of the present invention is that: the base fabric of the luggage material prepared by the preparation method of the luggage material with clear texture and not easy to fray at the edges provided by the present application has clear texture, and has a soft hand feeling. At the same time, the base fabric after being applied with paste twice has good resilience and stiffness. The luggage material is not easy to fray at the edges during the processing and cutting process, eliminating the need for fine processing of the cut luggage material, improving the processing efficiency and saving costs. Description of the Drawings

[0010] Figure 1 The following is a side sectional view of the luggage material in the specific implementation manner of the present invention;

[0011] Figure 2 The following is a comparison photo of the photos of the luggage materials prepared in Example 1 and Comparative Example 1 of the present invention.

[0012] Label description: 1, base fabric; 2, mesh hole; 3, diaphragm. Specific implementation manner

[0013] To describe in detail the technical content, achieved purpose and effects of the present invention, the following is described in conjunction with the implementation manners and accompanied by the drawings.

[0014] A preparation method of a luggage material with clear texture and not easy to fray includes the following steps:

[0015] S1. Apply paste to the base fabric with mesh holes twice to obtain a primary base fabric;

[0016] S2. Remove the paste in the mesh holes of the primary base fabric to obtain a secondary base fabric;

[0017] S3. Composite diaphragms on both sides of the secondary base fabric by a hot pressing process to obtain the luggage material.

[0018] Among them, the base fabric is a warp knitted fabric, preferably a 500D warp knitted fabric. Since the mesh holes are formed by the warp knitting process, when a warp knitted fabric is selected as the base fabric, the mesh holes are the main texture features. However, when applying paste to the base fabric for the second time, a large amount of paste penetrates into both the mesh holes and the base fabric structure, resulting in unclear mesh hole structures. Therefore, by removing the paste in the mesh holes before the film laminating step (S3), the texture of the luggage material after film lamination can be effectively improved. At the same time, the diaphragms on both sides of the base fabric can be partially joined (thermally welded) through the through holes during the hot pressing process, that is, a downward concave texture is generated, thereby more prominently showing the texture of the base fabric. At the same time, since part of the diaphragms are joined to each other, and another part of the diaphragms are adhered to the surface of the base fabric by paste, the peeling strength of the diaphragms can be effectively improved. It is detected that the peeling strength of the diaphragms of the prepared luggage material can reach more than 70 N / 5 cm.

[0019] The preferred method for removing the paste is to blow it off with a hot air blower. Specifically, the hot air blower blowing process is: blowing off with 2 - 3 groups of parallel horizontal air knives, the blowing temperature is 30 - 50 °C, the blower power is 8 - 12 kW, and the production speed is 6 - 20 m / min.

[0020] Furthermore, the secondary paste application includes the following steps:

[0021] S11. Immerse the base fabric in a PU paste or an acrylate surface treatment agent, and obtain a once-sized base fabric after drying.

[0022] S12. Perform roller pressing sizing on the once-sized base fabric with a PVC paste, and obtain the primary base fabric after drying.

[0023] In one embodiment, in order to ensure the flatness of the base fabric during the second sizing, it is usually necessary to perform ironing treatment on the impregnated base fabric, and the ironing temperature is preferably 60-80°C. At the same time, in order to ensure the uniformity of sizing and the flatness of the paste layer on the surface during the first sizing and the second sizing, a scraping treatment can be applied to the base fabric before drying. And the roller pressing sizing can further promote the uniform penetration of the PVC paste into the tissue fiber gaps of the base fabric, and at the same time, the excess paste can be extruded from the base fabric, ensuring the sizing amount to a certain extent.

[0024] Preferably, the viscosity of the PU paste or the acrylate surface treatment agent is 50-150 CPS, and the sizing amount is 5-10 gsm. More preferably, the formula of the PU paste (by weight) is: 100 parts of PU resin, 30-60 parts of diluent (the main component is ethyl acetate), and 0-2 parts of curing agent; the grade of the acrylate surface treatment agent is PA-10.

[0025] Preferably, the viscosity of the PVC paste is 600-1000 CPS, and the sizing amount is 100-160 gsm. More preferably, the formula of the PVC paste (by weight) is: 100 parts of E-PVC, 70-90 parts of DOTP, 1.5-3 parts of liquid barium-zinc stabilizer, and 2-4 parts of PVC crosslinking agent.

[0026] Among them, since the PU paste and the acrylate surface treatment agent have a better fiber penetration effect, choosing a PU paste or an acrylate surface treatment agent during the first sizing can effectively improve the feel of the luggage material to be more stiff. At the same time, both of them can be sized with a smaller sizing amount, thereby reducing the weight increase of the base fabric and meeting the requirements of lightweight materials. And the second sizing uses a PVC paste, which mainly plays a bonding role and effectively improves the hand feel resilience of the luggage material. At the same time, it is found in the experiment that if both times use a PU paste, the hand feel of the luggage material is too hard and the material resilience is poor.

[0027] It should be noted that in this article, the sizing amount mentioned all represents the weight increase of the base fabric after sizing.

[0028] At the same time, in order to ensure the overall effect of the edge side of the luggage material, it is preferable to use a colored paste of the same color system as the diaphragm, and when the diaphragm is transparent, it is preferable to use a transparent paste.

[0029] Preferably, the drying temperature in S11 is 100 - 130°C, and the drying temperature in S12 is 130 - 160°C

[0030] Specifically, the preparation method of the luggage material with clear texture and not easy to fray includes the following steps:

[0031] S1. Immerse the base cloth in a PU paste or acrylate surface treatment agent with a viscosity of 50 - 150 CPS, with a pasting amount of 5 - 10 gsm, and then dry it in an oven at a temperature of 100 - 130°C to obtain a once-pasted base cloth;

[0032] S2. Prepare a PVC surface diaphragm and a PVC bottom diaphragm by calendering process;

[0033] S3. Pre-inject a PVC paste with a viscosity of 600 - 1000 CPS into the paste tank of the laminating machine, pass the once-pasted base cloth through the paste tank and press and paste it with rollers, with a pasting amount of 100 - 160 gsm, to obtain a twice-pasted base cloth, and then dry the twice-pasted base cloth in an oven at 130 - 160°C to obtain a primary base cloth;

[0034] S4. Treat the primary base cloth with a hot air blower to obtain a secondary base cloth;

[0035] S5. Thermally press and laminate the preheated secondary base cloth, the preheated PVC surface diaphragm and the PVC bottom diaphragm, and after embossing and cooling, obtain the luggage material.

[0036] Among them, the preheating temperature is 140 - 160°C.

[0037] Furthermore, the material of the diaphragm is PVC, the diaphragm includes a surface diaphragm and a bottom diaphragm. Preferably, the thickness of the surface diaphragm is 0.12 - 0.20 mm; the thickness of the bottom diaphragm is 0.18 - 0.26 mm.

[0038] A luggage material prepared by the preparation method of the aforementioned luggage material with clear texture and not easy to fray, see Figure 1 As shown, on one side of a part, the diaphragm 3 is joined to the diaphragm 3 on the other side of the part through the mesh hole 2, and on the surface of the base cloth 1, another part of the diaphragm 3 is laminated.

[0039] Example 1

[0040] The preparation method of the luggage material with clear texture and not easy to fray includes the following steps:

[0041] S1. Immerse the base cloth in a PU paste with a viscosity of 50 CPS, with a pasting amount of 5 gsm, and then dry it at 100°C to obtain a once-pasted base cloth;

[0042] S2. Prepare a PVC surface diaphragm and a PVC bottom diaphragm by calendering process;

[0043] S3. Pre-inject a PVC paste with a viscosity of 600 CPS into the paste tank of the laminating machine, pass the once-coated base fabric through the paste tank and press and coat with rollers, with a coating amount of 100 gsm, to obtain a twice-coated base fabric, and then dry the twice-coated base fabric in an oven at 140 °C to obtain a primary base fabric;

[0044] S4. Treat the primary base fabric with a hot air blower to obtain a secondary base fabric;

[0045] The process parameters of the hot air blowing treatment are: 2 groups of parallel horizontal air knives for blowing, the blowing temperature is 50 °C, the fan power is 12 kW, and the production speed is 20 m / min;

[0046] S5. Thermally press and laminate the preheated secondary base fabric, the preheated PVC surface diaphragm and the PVC bottom diaphragm, and after embossing and cooling, obtain the luggage material.

[0047] Example 2

[0048] A method for preparing a luggage material with clear texture and not easy to fray, comprising the following steps:

[0049] S1. Immerse the base fabric in a PU paste with a viscosity of 150 CPS, with a coating amount of 10 gsm, and then dry it at 130 °C to obtain a once-coated base fabric;

[0050] S2. Prepare a PVC surface diaphragm and a PVC bottom diaphragm by calendering process;

[0051] S3. Pre-inject a PVC paste with a viscosity of 1000 CPS into the paste tank of the laminating machine, pass the once-coated base fabric through the paste tank and press and coat with rollers, with a coating amount of 160 gsm, to obtain a twice-coated base fabric, and then dry the twice-coated base fabric in an oven at 160 °C to obtain a primary base fabric;

[0052] S4. Treat the primary base fabric with a hot air blower to obtain a secondary base fabric;

[0053] The process parameters of the hot air blowing treatment are: 2 groups of parallel horizontal air knives for blowing, the blowing temperature is 50 °C, the fan power is 12 kW, and the production speed is 20 m / min;

[0054] S5. Thermally press and laminate the preheated secondary base fabric, the preheated PVC surface diaphragm and the PVC bottom diaphragm, and after embossing and cooling, obtain the luggage material.

[0055] Example 3

[0056] Preparation method of a luggage material with clear texture and not easy to fray, comprising the following steps:

[0057] S1. Immerse the base fabric in an acrylate surface treatment agent with a viscosity of 100 CPS, with a sizing amount of 8 gsm, and then dry it at 120 °C to obtain a once-sized base fabric;

[0058] S2. Prepare a PVC surface diaphragm and a PVC bottom diaphragm by calendering process;

[0059] S3. Pre-inject a PVC paste with a viscosity of 800 CPS into the paste tank of a laminating machine, pass the once-sized base fabric through the paste tank and roll-press it for sizing, with a sizing amount of 140 gsm, to obtain a twice-sized base fabric, and then dry the twice-sized base fabric in an oven at 150 °C to obtain a primary base fabric;

[0060] S4. Treat the primary base fabric with a hot air blower to obtain a secondary base fabric;

[0061] The process parameters of the hot air blowing treatment are: 3 groups of parallel transverse air knives for blowing, a blowing temperature of 30 °C, a fan power of 8 kW, and a production speed of 6 m / min;

[0062] S5. Thermally press and laminate the preheated secondary base fabric, the preheated PVC surface diaphragm and the PVC bottom diaphragm, and after embossing and cooling, obtain the luggage material.

[0063] Comparative Example 1

[0064] The preparation method of a luggage material with clear texture and not easy to fray, which is different from Example 1 in that: step S4 is missing, that is, the paste in the mesh holes is not removed.

[0065] Experimental Example 1

[0066] Perform peel strength detection on Examples 1 to 3, and the detection results are shown in Table 1.

[0067] Table 1

[0068]

[0069] As can be seen from Table 1, the peel strength is proportional to the amount of sizing. After testing, the peel strength of the luggage material prepared in Example 1 is 73 N / 5 cm, that of Example 2 is 92 N / 5 cm, and that of Example 3 is 79 N / cm. The stiffness is mainly determined by the amount of sizing of the PU paste or acrylate surface treatment agent. Therefore, the luggage material prepared in Example 2 is the stiffest; the softness and resilience are jointly determined by the amount of sizing in two times. Therefore, the luggage material prepared in Example 1 is the softest because its sizing amount is the least, while the handfeel resilience effect of Example 3 is the best because the sizing amounts of the two times of sizing are moderate. In Comparative Example 1, no mesh hole paste is blown. Compared with Example 1 under the same test conditions, the peel strength, stiffness and softness are comparable, and the resilience is slightly worse, but the surface exposed base fabric texture effect is poor.

[0070] Experimental Example 2

[0071] The luggage materials prepared in Example 1 and Comparative Example 1 were photographed, and the results are respectively as Figure 2 shown, Figure 2 In the figure, the left side is the luggage material prepared in Example 1, and the right side is the luggage material prepared in Comparative Example 1. From Figure 2 the comparison in the figure, it can be found that the surface base fabric texture of the luggage material prepared in Example 1 is clearer than that of the luggage material prepared in Comparative Example 1.

[0072] In summary, the base fabric of the non-fraying luggage material prepared by the method for preparing a non-fraying luggage material with clear texture provided by the present application has clear texture, a soft handfeel, and at the same time, the base fabric after two times of sizing has good resilience and stiffness. The edge of the luggage material is not easy to fray during the processing and cutting process, eliminating the need for fine processing of the cut luggage material, improving the processing efficiency and saving costs.

[0073] The above are only the embodiments of the present invention, and thus do not limit the patent scope of the present invention. Any equivalent transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A preparation method of a luggage material with clear texture and not easy to fray, characterized in that, it includes the following steps: S1. Immerse a base cloth with mesh holes in a PU paste or an acrylate surface treatment agent, and obtain a primary pasted base cloth after drying; perform roller pressing and pasting on the primary pasted base cloth with a PVC paste, and obtain a primary base cloth after drying; S2. Remove the paste in the mesh holes of the primary base cloth to obtain a secondary base cloth; S3. Composite diaphragms on both sides of the secondary base cloth by a hot pressing process to obtain the luggage material; One side of the diaphragm of the luggage material part is joined to the diaphragm on the other side through the mesh holes, and the other part of the diaphragm is attached to the surface of the base cloth.

2. The preparation method of the luggage material with clear texture and not easy to fray according to claim 1, characterized in that, the viscosity of the PU paste or acrylate surface treatment agent is 50 - 150 CPS, and the pasting amount is 5 - 10 gsm.

3. The preparation method of the luggage material with clear texture and not easy to fray according to claim 1, characterized in that, the viscosity of the PVC paste is 600 - 1000 CPS, and the pasting amount is 100 - 160 gsm.

4. The preparation method of the luggage material with clear texture and not easy to fray according to claim 1, characterized in that, in S11, the drying temperature is 100 - 130 °C, and in S12, the drying temperature is 130 - 160 °C.

5. The preparation method of the luggage material with clear texture and not easy to fray according to claim 1, characterized in that, the material of the diaphragm is PVC, the diaphragm includes a surface diaphragm and a bottom diaphragm, the thickness of the surface diaphragm is 0.12 - 0.20 mm, and the thickness of the bottom diaphragm is 0.18 - 0.26 mm.

6. The preparation method of the luggage material with clear texture and not easy to fray according to claim 1, characterized in that, the base cloth is 500D warp knitted cloth, and the mesh holes are formed by the warp knitting process.

7. The preparation method of the luggage material with clear texture and not easy to fray according to claim 1, characterized in that, in S2, the way to remove the paste is to blow it with a hot air blower, and the conditions for blowing with the hot air blower are: 2 - 3 groups of parallel horizontal air knives for blowing, the blowing temperature is 30 - 50 °C, the power of the blower is 8 - 12 kW, and the production speed is 6 - 20 m / min.

8. A luggage material not easy to fray prepared by the preparation method of the luggage material with clear texture and not easy to fray according to any one of claims 1 to 7.

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