Flanging glue overflowing process for lower hem and cuffs of outdoor jacket

Abstract

The invention relates to an edge-folding glue-overflowing process for a lower hem and cuffs of an outdoor jacket, which comprises the following steps of: pretreating a fabric, namely inspecting, cutting and preshrinking the fabric; carrying out edge folding and thermoplastic treatment for the first time to soften the fabric; gluing treatment is carried out to meet the glue overflowing requirement; carrying out secondary edge folding and compaction treatment to finish fitting; post-treatment and quality inspection are carried out. According to the technology, through gluing treatment and compaction treatment, it is ensured that a firm bonding layer is formed between the two layers of fabric after edge folding through hot melt glue, the traditional hidden danger that rainwater invades through needle holes or other tiny gaps due to a sewing structure is effectively solved, and therefore the waterproof performance of the outdoor jacket is remarkably improved. Besides, the fabric is softened through thermoplastic treatment, the bonding layer is formed through gluing treatment, and the bonding strength and stability are enhanced through hot pressing and cold pressing treatment, so that the problems of cracking and degumming of the seam due to friction and stretching are effectively avoided, and the service life of the outdoor jacket is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of clothing processing, in particular to a hem overflow glue process for a jacket hem and cuffs. Background Art

[0002] As the global outdoor sports market continues to expand at an average annual compound growth rate of 6.8%, the functional clothing sector is experiencing explosive growth. As a professional outdoor equipment that is waterproof, windproof and breathable, jackets have become a core category in the outdoor equipment market. However, in the field of processing technology for key parts such as the hem and cuffs of jackets, traditional technologies are facing severe technical bottlenecks.

[0003] The simple sewing process currently used in the industry has the advantage of production efficiency, but it has essential defects. The density of the pinholes formed by the sewing machine is too high, and rainwater can easily penetrate through the pinholes, which greatly reduces the waterproof performance. Micron-level water seepage channels are formed. In addition, under long-term wear and friction, the seams will inevitably break, directly leading to the failure of the seam structure, which not only affects the appearance of the clothing, but also shortens the service life.

[0004] Therefore, in order to improve the waterproof performance, the common glue pressing process was derived, but new problems were still exposed in practical applications. Since the common glue pressing process is implemented after sewing, the seams are treated with glue pressing strips. However, this process often results in the glue pressing strips not fitting tightly to the fabric, the glue pressing is uneven, and the glue is easily leaked or debonded locally, making it difficult to guarantee the waterproof effect. In addition, the material and performance of the glue pressing strips have a great impact on the overall quality of the jacket. Some glue pressing strips will become hard and brittle in low temperature environments, seriously affecting the comfort and durability of the clothing. Summary of the invention

[0005] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide a process for preventing glue overflow at the hem and cuffs of a jacket, so as to solve one or more problems in the prior art.

[0006] To achieve the above object, the technical solution of the present invention is as follows: A process for preventing glue overflow at the hem and cuffs of a jacket, comprising the following steps: Fabric pretreatment, including inspection, cutting and pre-shrinkage of fabrics; The first hem is treated with thermoplastics to soften the fabric; Gluing treatment to meet the requirements of glue overflow; The second folding and compaction process completes the bonding; Post-processing and quality inspection.

[0007] Furthermore, the cutting is reserved based on the folding requirement, and during the pre-shrinking, the temperature is controlled to be 140-160°C.

[0008] Furthermore, during the thermoplastic treatment, the heating temperature of the fabric is controlled to be 110-120°C.

[0009] Furthermore, the gluing process comprises the following steps: Colloid preparation, selected according to the overflow requirements; Parameters are set and gluing is performed. During the gluing process, the temperature is controlled at 140-160°C and the gluing speed is 2000-3500 mm / min.

[0010] Furthermore, the first folding and the second folding are both processed based on the requirement of glue overflow, so that the glue part is located between the fabrics after folding and is 1 / 6 to 1 / 3 of the folding width.

[0011] Furthermore, the compaction process comprises the following steps: Hot pressing treatment makes the colloid and the fabric fully bonded; Cold pressing process to further improve adhesion.

[0012] Furthermore, in the hot pressing treatment, the hot pressing temperature is controlled to be 140-160° C., the hot pressing time is controlled to be 15-25 s, and the hot pressing pressure is controlled to be 2.5-4.5 kg.

[0013] Furthermore, in the cold pressing process, the cold pressing temperature is controlled to be 12-18° C., the cold pressing time is controlled to be 10-15 s, and the cold pressing pressure is controlled to be 2-4.5 kg.

[0014] Compared with the prior art, the beneficial technical effects of the present invention are as follows: (I) The process of the present invention ensures that the hot melt colloid forms a strong adhesive layer between the two layers of fabric after folding through the gluing and compacting treatment, effectively solving the hidden danger of rainwater intruding through pinholes or other tiny gaps due to the traditional sewing structure, thereby significantly improving the waterproof performance of the jacket. In addition, the fabric is softened by thermoplastic treatment, the adhesive layer is formed by gluing treatment, and the adhesive strength and stability are enhanced by hot pressing and cold pressing treatment, effectively avoiding the problem of cracking and degumming at the seams due to friction and stretching, and extending the service life of the jacket.

[0015] (ii) The process of the present invention carries out detailed inspection, cutting and pre-shrinkage treatment in the fabric pre-treatment stage, which effectively prevents the fabric from shrinking and being uneven in subsequent process operations. At the same time, in key steps such as gluing, hemming and compaction, various parameters and operating requirements are strictly controlled to ensure processing accuracy and finished product quality. At the same time, the overall appearance quality of the clothing is further improved through post-processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1A schematic diagram of the process of hemming and glue overflow process of a jacket hem and cuffs according to an embodiment of the present invention is shown.

[0017] Figure 2 A structural schematic diagram of a hem overflow glue process for a jacket hem and cuffs according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following is a further detailed description of the hem overflow glue process of the hem and cuffs of a jacket proposed by the present invention in combination with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiment of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with this technology can understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0019] See also Figure 1 and Figure 2 The hem overflow glue process of the jacket hem and cuffs of this embodiment includes the following steps: Step 1: Fabric pretreatment, including fabric inspection, cutting and pre-shrinkage.

[0020] The surface of the fabric should be carefully inspected to ensure that there are no defects, damage, stains, etc. According to the design specifications of the jacket, the fabric is accurately cut using professional cutting equipment. The cutting is reserved based on the folding requirements, and the width of the hem and cuffs is reserved to leave sufficient operating space for the subsequent folding and overflow glue process. In this embodiment, the reserved width is set to 30mm, which is the width after folding. Figure 2 Shown L 1 Width.

[0021] When pre-shrinking fabrics, the cut fabrics are placed in the bonding machine and the temperature is controlled at 140-160℃ for pre-shrinking. This temperature range can make the fiber molecular chains in the fabrics highly active and reach a certain degree of relaxation under heat, effectively preventing the fabrics from shrinking unevenly in subsequent process operations, thereby ensuring processing accuracy and finished product quality. If the temperature is lower than 140℃, the fabric fiber molecules cannot be fully active and the pre-shrinking effect cannot be effectively achieved. There is still a risk of uneven shrinkage in the subsequent process, affecting the processing accuracy and finished product quality. When the temperature is higher than 160℃, it may damage the physical properties of the fabric, such as making the fabric hard and brittle, and reducing the strength and comfort of the fabric. Through comparative experimental analysis, it is found that the dimensional stability of fabrics pre-shrunk at 140-160℃ during subsequent processing and use is improved by about 30% compared with fabrics that are not pre-shrunk or pre-shrunk at an inappropriate temperature.

[0022] Step 2: First hem fold and heat treatment to soften the fabric.

[0023] Lay the fabric flat on the suction ironing table, and perform the first folding to form the fabric according to the reserved 30mm width. During the first folding process, it is assisted by thermoplastic treatment, that is, the fabric is heated moderately with an iron. During the thermoplastic treatment, the heating temperature of the fabric is controlled to be 110-120℃. Without damaging the original performance of the fabric, the fabric fiber is softened to facilitate the first folding and subsequent processing. If the temperature is lower than 110℃, the fabric fiber is not softened enough, and the folding may not be smooth and the fabric is easy to break. On the contrary, if the temperature is higher than 120℃, the surface of the fabric may change color, deform, and affect the appearance quality of the clothing. According to comparative experimental analysis, the qualified rate of folding the fabric after thermoplastic treatment at 110-120℃ is about 25% higher than that of the fabric that has not been thermoplasticized or the temperature is not in this range.

[0024] After the first folding, the hem and cuffs are strictly inspected for quality, with a focus on whether the folding width is uniform, whether the folding is flat, and whether there are wrinkles. For parts that do not meet the quality requirements, they are promptly and meticulously adjusted and repaired to ensure that the folding quality fully meets the high standards of subsequent processes, providing a strong guarantee for the high quality of the final product.

[0025] Step 3: Glue treatment to meet the overflow requirements.

[0026] Step 3.1: Glue preparation, selected according to the overflow requirements. In this embodiment, it is preferred to use 12mm finished overflow double-sided hot melt glue, such as Figure 2 Shown L 2 width to ensure that its quality and performance meet the process requirements.

[0027] Step 3.2: Parameter setting and gluing operation, combined with the requirement of 5mm of overflow glue in this embodiment, that is, Figure 2 Shown L 3 The width of the glue is applied. During the gluing process, the temperature is controlled to be 140-160°C. If the temperature is too low, the colloid cannot be fully melted, which may lead to uneven gluing and block-shaped or strip-shaped colloid distribution, affecting the overflow effect and the firmness of the adhesion. If the temperature is too high, the viscosity of the colloid will decrease, and even carbonization will occur, reducing its performance and quality. The gluing speed is controlled to be 2000-3500mm / min to ensure that the gluing width is uniform and there is no wrinkle, so that the hot melt adhesive can be accurately and evenly applied to the folded edge, providing reliable guarantee for the subsequent bonding and sealing effect. If the speed is too slow, it will lead to excessive gluing and colloid accumulation, affecting the appearance and wearing comfort of the clothing, while if the speed is too fast, the colloid coating may be incomplete and uneven, and the overflow and bonding requirements cannot be met. Through comparative experimental analysis, it is concluded that under the temperature and gluing speed parameters controlled in this embodiment, the stability of the gluing quality and the compliance rate of the overflow effect can reach more than 90%.

[0028] Step 4: Fold and compact for the second time to complete the bonding.

[0029] After the gluing is completed in step 3, the second folding process is carried out in time, and the hem and cuffs with hot melt glue are moved to the steam ironing table and folded accurately according to the design requirements. The first folding and the second folding are both based on the overflow glue requirement of 5mm, so that the hot melt glue part is located between the fabrics after folding and is 1 / 6 to 1 / 3 of the folding width. In this embodiment, a final overflow glue effect with a width of 5mm is formed. Figure 2 As shown, the width of the overflow glue should not be too narrow or too wide, and should ensure firmness and aesthetics. Especially in the second folding process, it is necessary to ensure that the folding is neat and without misalignment, and the hot melt adhesive is evenly distributed inside the folding, strictly avoiding the occurrence of bubbles and gaps to ensure the bonding effect and waterproof performance.

[0030] Step 4.1: Heat pressing to ensure that the colloid and the fabric are fully bonded.

[0031] After the second folding is completed, a hot press is used to heat press the hem and cuffs after the second folding. The hot pressing temperature is controlled to be 140-160°C during the hot pressing process, which matches the above-mentioned glue control temperature, so that the colloid can maintain good activity and fluidity and better penetrate into the fabric fiber. The hot pressing time is controlled to be 15-25s, which can allow the colloid to fully diffuse and form a tight bond with the fabric, but avoid damage to the fabric or degradation of the colloid performance due to too long a time. The hot pressing pressure is controlled to be 2.5-4.5kg. On the one hand, it can provide sufficient pressure to make the colloid fit tightly with the fabric, and on the other hand, it will not cause excessive extrusion of the jacket and affect its internal structure and appearance. Through comparative experimental analysis, it is concluded that the hot pressing temperature, hot pressing time and hot pressing pressure set in this embodiment allow the hot melt adhesive to fully penetrate and diffuse between the two layers of fabric, forming a strong bonding layer, enhancing the durability of the hem and cuffs, and increasing the bonding strength between the colloid and the fabric by about 40-50% compared with before treatment.

[0032] Step 4.2: Cold pressing to further improve adhesion.

[0033] After the above-mentioned hot pressing treatment is completed, cold pressing treatment is immediately carried out. In the cold pressing treatment, the cold pressing temperature is controlled to be 12-18°C, which can make the hot melt adhesive solidify quickly in a low temperature environment, enhance its bonding strength with the fabric, and prevent deformation and other problems caused by the softening of the adhesive layer again due to excessive temperature. Controlling the cold pressing time to be 10-15s can ensure that the adhesive layer has enough time to complete the curing process. Controlling the cold pressing pressure to be 2-4.5kg helps to make the folding edge smoother and tighter, and further improve the fit and stability between the colloid and the fabric. Through comparative experimental analysis, it is concluded that under the parameters of cold pressing temperature, time and pressure set in this embodiment, it can ensure that the hot melt adhesive and the fabric can be fully bonded, improve the bonding strength and stability, and make the folding edge smoother and more beautiful, improve the overall appearance quality of the clothing, and have a significant improvement compared to samples that have not been cold pressed or have inappropriate parameters. In simulated long-term friction and tensile tests, the probability of degumming and cracking is reduced by about 30-40%.

[0034] Step 5: Post-processing and quality inspection.

[0035] After the compaction process is completed, the hem and cuffs of the jacket are carefully post-processed, including carefully trimming excess thread ends to ensure that there are no residual thread ends that affect the appearance. The residual glue on the surface is thoroughly cleaned to make the hem and cuffs look neat and beautiful without any defects, showing high-quality craftsmanship.

[0036] The final quality inspection includes but is not limited to waterproof performance test, appearance quality inspection and durability test. The waterproof performance test ensures that it can withstand sufficient water pressure, effectively prevent rainwater from intruding, and ensure that the wearer is dry and comfortable in a humid environment. The appearance quality inspection ensures that the appearance of the clothing meets high quality requirements and has no defects that affect the appearance. The durability test ensures that after a certain number of friction and stretching, there are no cracks or degumming problems at the fold, ensuring the reliability and durability of the jacket during long-term use.

[0037] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0038] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A process for preventing the overflow of glue on the hem and cuffs of a jacket, characterized by: The steps include: Fabric pretreatment, including inspection, cutting and pre-shrinkage of fabrics; The first hem is treated with thermoplastics to soften the fabric; Gluing treatment to meet the requirements of glue overflow; The second folding and compaction process completes the bonding; Post-processing and quality inspection.

2. The process for preventing glue overflow at the hem and cuffs of a jacket as claimed in claim 1, characterized in that: The cutting is reserved based on the folding requirement, and during the pre-shrinking, the temperature is controlled to be 140-160°C.

3. The process for preventing glue overflow at the hem and cuffs of a jacket as claimed in claim 2, characterized in that: During the thermoplastic treatment, the heating temperature of the fabric is controlled to be 110-120°C.

4. The process for preventing glue overflow at the hem and cuffs of a jacket as claimed in claim 3, characterized in that: The gluing process comprises the following steps: Colloid preparation, selected according to the overflow requirements; Parameters are set and gluing is performed. During the gluing process, the temperature is controlled at 140-160°C and the gluing speed is 2000-3500 mm / min.

5. The process for preventing glue overflow at the hem and cuffs of a jacket as claimed in claim 4, characterized in that: The first folding and the second folding are both processed based on the requirement of glue overflow, so that the glue part is located between the fabrics after folding and is 1 / 6 to 1 / 3 of the folding width.

6. The process for preventing glue overflow at the hem and cuffs of a jacket as claimed in claim 5, characterized in that: The compaction process comprises the following steps: Hot pressing treatment makes the colloid and the fabric fully bonded; Cold pressing process to further improve adhesion.

7. The process for preventing glue overflow at the hem and cuffs of a jacket as claimed in claim 6, characterized in that: In the hot pressing treatment, the hot pressing temperature is controlled to be 140-160° C., the hot pressing time is controlled to be 15-25 seconds, and the hot pressing pressure is controlled to be 2.5-4.5 kg.

8. The process for preventing glue overflow at the hem and cuffs of a jacket as claimed in claim 7, characterized in that: In the cold pressing process, the cold pressing temperature is controlled to be 12-18° C., the cold pressing time is controlled to be 10-15 seconds, and the cold pressing pressure is controlled to be 2-4.5 kg.

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