A laser effect breathable shoe upper, a method of manufacturing the shoe upper, and a vacuum heat press

Abstract

The present application provides a kind of laser effect breathable vamp, the method for manufacturing the vamp and vacuum hot press, it is related to textile shoe material field;Vamp main part is woven using or partially using thermoplastic elastomer yarn, vamp main body is fixedly adhered from top to bottom: color layer, aluminum plating layer and adhesive layer;The yarn material of the vamp of the present application uses or partially uses thermoplastic elastomer yarn, thermoplastic elastomer yarn and the thermoplastic resin of adhesive layer can be closely fused when vacuum hot pressing, so that color layer, aluminum plating layer is more firmly adhered on vamp, simultaneously by the design of breathable hole, color layer, aluminum plating layer and adhesive layer are only fixedly adhered on the thermoplastic elastomer yarn around the breathable hole of vamp and do not cover the breathable hole of vamp, so that the vamp with laser effect and good breathability is obtained.

Description

Technical Field

[0001] This invention relates to the field of textile and footwear materials, and more specifically, to a laser-effect breathable shoe upper, a method for manufacturing the shoe upper, and a vacuum hot press. Background Technology

[0002] In the current market, shoes with laser-effect uppers have emerged to meet consumer demand for shoe appearance. The laser effect on the upper is colored light reflected at different angles, and its effect usually comes from one or more optical films. In existing technologies, the laser effect is often achieved through laser film lamination, holographic transfer, and laser lettering film heat transfer. These processes require adding one or more films to the upper. The film is a continuous, water- and air-impermeable structure, and the entire surface of the upper makes it difficult for air to penetrate. At the same time, UV photosensitive adhesive is applied to the upper during the transfer process. The adhesive can seep into the micropores of the fabric and block them. Although the upper itself has some breathability, it is sealed by the adhesive layer, resulting in poor breathability and stuffy feet. Therefore, there is an urgent need to develop an upper that has a laser effect without affecting the breathability of the upper. The applicant proposes a method for manufacturing a laser-effect breathable upper and a vacuum hot press, which produces an upper that has both a laser effect and good breathability. Summary of the Invention

[0003] This invention provides a laser-effect breathable shoe upper, a method for manufacturing the shoe upper, and a vacuum hot press, aiming to improve the technical problem of poor breathability of existing laser-effect shoe uppers.

[0004] A laser-effect breathable shoe upper, comprising a main body with ventilation holes, the main body being woven from or partially from thermoplastic elastomer yarn, and the following fixedly adhered to the main body from top to bottom: The color layer, composed of a mixture of synthetic resin and pigments, determines the color of the radiation effect; The aluminum plating layer is formed by heating aluminum wire under vacuum to melt and vaporize the aluminum wire, and then depositing the aluminum vapor evenly on the surface of the color layer to create a laser effect. The adhesive layer is made of thermoplastic resin; The color layer, aluminum plating layer, and adhesive layer are fixedly adhered to the thermoplastic elastomer yarn without covering the ventilation holes of the main body of the shoe upper.

[0005] Specifically, the diameter of the ventilation holes in the main body of the shoe upper is 0.3~3 mm to prevent the ventilation holes from being too small and being blocked during subsequent hot pressing, or from being too large and causing the shoe upper to collapse.

[0006] Specifically, the thermoplastic elastomer yarn is either thermoplastic polyurethane elastomer (TPU) yarn or thermoplastic polyester elastomer (TPEE) yarn. During hot pressing, the thermoplastic elastomer yarn can be tightly fused with the thermoplastic resin of the adhesive layer, thereby ensuring the color fastness of the shoe upper.

[0007] Specifically, the color layer is formed by mixing one or more of nitrocellulose, acrylic resin, aldehyde-ketone resin, and petroleum resin with silica and pigments.

[0008] Specifically, the adhesive layer is formed by coating one or more of polypropylene resin and petroleum resin onto the aluminum plating layer.

[0009] Specifically, the color layer and adhesive layer also include a polyurethane curing agent. As a crosslinking agent, the polyurethane curing agent undergoes a crosslinking reaction during drying or hot pressing, which can significantly improve the stability and water resistance of the color layer, the aluminum plating layer and the adhesive layer.

[0010] This invention also provides a method for manufacturing a laser-effect breathable shoe upper, comprising the following steps: S1. The yarn material is made of thermoplastic elastomer yarn or partially thermoplastic elastomer yarn. The thermoplastic elastomer yarn is woven into the main body of the shoe upper using a knitting machine or a weaving machine. The main body of the shoe upper has ventilation holes with a diameter of 0.3 to 3 mm. S2. Polyester film (PET) is selected as the base film layer. Emulsified wax is evenly coated on the base film layer and dried to form a release layer. The release layer melts during hot pressing, so that the subsequent coating can be easily peeled off from the base film layer. S3. A color paste formed by mixing synthetic resin and pigment is evenly coated on the release layer and dried to form a color layer; S4. The composite structure of base film layer, release layer and color layer is sent into vacuum coating chamber. The aluminum wire is heated to melt and vaporize. The aluminum vapor is uniformly deposited on the surface of color layer to form aluminum coating layer. S5. A thermoplastic resin is uniformly coated on the aluminum-plated layer and dried to form an adhesive layer. The base film layer, release layer, color layer, aluminum-plated layer and adhesive layer are combined to form a laser film with a multi-layer structure. S6. Place the adhesive layer of the laser film facing the front of the shoe upper body and put them into the vacuum hot press. Set the upper film temperature to 300~360℃, the lower mold temperature to 180~220℃, the vacuum negative pressure to -0.06 to -0.09MPa, and the hot pressing time to 50-60 seconds. S7. Cold setting for 20-40 seconds: The color layer, aluminum plating layer and adhesive layer are cooled and fixed to the thermoplastic elastomer yarn of the main body of the shoe upper. The base film layer is peeled off to obtain a laser-effect breathable shoe upper. The ventilation holes of the main body of the shoe upper are not covered by the color layer, aluminum plating layer and adhesive layer.

[0011] Specifically, in step S1, patterned yarn is embroidered on the main body of the shoe upper using an embroidery machine. The patterned yarn is thermoplastic polyurethane elastomer (TPU) yarn or thermoplastic polyester elastomer (TPEE) yarn. The patterned yarn can provide more pattern designs, while ensuring that the color layer, aluminum plating layer and adhesive layer are tightly and firmly adhered to the main body of the shoe upper during hot pressing.

[0012] Specifically, in step S3, the mixing ratio of the color paste is: acrylic resin (10~50%), nitrocellulose (1.5~30%), aldehyde-ketone resin (1~10%), petroleum resin (1~10%), silica (0.5~4%), and pigment (5~20%).

[0013] Specifically, in step S5, the mixing ratio of thermoplastic resin in the adhesive layer is: polypropylene resin (97~100%), petroleum resin (0~3%), and polyurethane curing agent (0~3%).

[0014] Specifically, in step S4, the vacuum coating is set with a vacuum pressure of 1.3×10⁻²~1.3×10⁻³ Pa and the resistance heating is 1200~1500℃.

[0015] Specifically, in step S3, the dried color layer is hot-pressed with a nickel plate to imprint a texture on the surface of the color layer. After vacuum aluminizing, the aluminized layer will replicate these textures, thereby producing a more obvious laser effect.

[0016] This invention also provides a vacuum hot press for making breathable shoe uppers with a laser effect. The structure includes: an upper hot pressing mechanism, a lower heating mechanism, a conveying mechanism, and a vacuum fixing mechanism. The vacuum fixing mechanism includes a vacuum pump, which is connected to a negative pressure membrane through an air pipe to create a negative pressure below the negative pressure membrane. The negative pressure membrane fixes the shoe upper body and the laser film through a fixing rod and a hydraulic rod to prevent the shoe upper body and the laser film from shifting during the hot pressing and conveying process. Beneficial effects

[0017] The shoe upper yarn of this invention uses or partially uses thermoplastic elastomer yarn. The thermoplastic elastomer yarn and the thermoplastic resin of the adhesive layer can be tightly fused during vacuum hot pressing, allowing the color layer and aluminized layer to adhere more firmly to the shoe upper. Simultaneously, through the design of vent holes with a diameter of 0.3~3 mm, the color layer, aluminized layer, and adhesive layer are only fixedly adhered to the thermoplastic elastomer yarn around the vent holes of the shoe upper. The base film layer is peeled off, and the color layer, aluminized layer, and adhesive layer do not cover or block the vent holes of the shoe upper, thus obtaining a shoe upper with a laser effect and good breathability. Furthermore, this invention utilizes a vacuum fixing mechanism on the vacuum hot press to vacuum-fix the adsorbed laser film to the shoe upper body, thereby preventing the shoe upper body and laser film from shifting during hot pressing and conveying, effectively improving the product yield. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is an exploded view of the structure of the laser-effect breathable shoe upper according to the first embodiment of the present invention; Figure 2 This is an exploded view of the structure of the laser film of this invention; Figure 3 This is a schematic diagram of the structure of the vacuum hot press of the present invention; Figure 4 This is a front structural view of the vacuum hot press of the present invention; Figure 5 This is a front structural view of the vacuum fixing mechanism of the present invention; Figure 6 This is an exploded view of the structure of the laser-effect breathable shoe upper according to the second embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the laser-effect breathable shoe upper according to the second embodiment of the present invention; Figure 8 yes Figure 7 An enlarged diagram of A in the diagram.

[0020] In the diagram: upper body-1, ventilation holes-101, laser film-2, base film layer-201, release layer-202, color layer-203, aluminum plating layer-204, adhesive layer-205, patterned yarn-3, vacuum hot press-4, vacuum fixing mechanism-41, vacuum pump-411, negative pressure film-412, fixing pressure rod-413, hydraulic rod-414, lower heating mechanism-42, upper hot pressing mechanism-43, conveying mechanism-44. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Example 1, please refer to Figures 1 to 5 The first embodiment of the present invention provides a method for manufacturing a laser-effect breathable shoe upper, comprising the following steps: S1. The yarn material is thermoplastic elastomer yarn. The thermoplastic elastomer yarn is woven into the upper body 1 using a knitting machine. The upper body 1 has ventilation holes 101 with a diameter of about 2 mm. S2. PET film is selected as the base film layer 201. Emulsified wax is uniformly coated on the base film layer 201 and dried to form a release layer 202. The release layer 202 can melt during hot pressing, which facilitates the subsequent coating to be easily peeled off from the base film layer 201. S3. A color paste is uniformly coated on the release layer 202, which is a mixture of 50% acrylic resin, 20% nitrocellulose, 5% aldehyde-ketone resin, 5% petroleum resin, 3% silica and 17% pigment, and then dried to form the color layer 203. S4. The composite structure of base film layer 201, release layer 202 and color layer 203 is sent into the vacuum coating chamber. The vacuum pressure is set to 1.3×10⁻² Pa and the resistance heating is set to 1400℃. The aluminum wire is heated to melt and vaporize. The aluminum vapor is uniformly deposited on the surface of color layer 203 to form an aluminum plating layer 204 with a thickness of about 0.035μm. S5. A mixture of 98% polypropylene resin and 2% polyurethane curing agent is uniformly coated on the aluminum-plated layer 204. After drying, an adhesive layer 205 is formed. The base film layer 201, release layer 202, color layer 203, aluminum-plated layer 204 and adhesive layer 205 are combined to form a laser film 2 with a multi-layer structure. S6. Place the adhesive layer 205 of the laser film 2 facing the front of the shoe upper body 1 and put them together into the vacuum hot press of the present invention. Set the upper film temperature to 330°C, the lower mold temperature to 190°C, the vacuum negative pressure to -0.08MPa, and the hot pressing time to 55 seconds. S7. After 35 seconds of cold setting, the color layer 203, the aluminum plating layer 204, and the adhesive layer 205 are cooled and fixed to adhere to the thermoplastic elastomer yarn of the upper body 1. The base film layer 201 is peeled off. The color layer 203, the aluminum plating layer 204, and the adhesive layer 205 do not cover or block the ventilation holes 101 of the upper, thus obtaining a laser-effect breathable upper.

[0023] Specifically, this embodiment also provides a vacuum hot press for making breathable shoe uppers with laser effects. The structure includes an upper hot press mechanism 43, a lower heating mechanism 42, a conveying mechanism 44, and a vacuum fixing mechanism 41. The vacuum fixing mechanism 41 includes a vacuum pump 411. In use, the conveying mechanism 44 sends the vacuum fixing mechanism 41 and the lower heating mechanism 42 together to the front of the machine for easy operation. The shoe upper body 1 and the laser film 2 are placed on the lower heating mechanism 42. The negative pressure membrane 412 is vertically moved down and fixed to press the shoe upper body 1 and the laser film 2 by the hydraulic rod 414 and the fixing pressure rod 413. The vacuum pump 411 is started, and a vacuum negative pressure is formed under the negative pressure membrane 412 to further fix the shoe upper body 1 and the laser film 2, thereby preventing the shoe upper body 1 and the laser film 2 from shifting position during the process of conveying the shoe upper body 1 and the laser film 2 back to the lower part of the upper hot press mechanism 43.

[0024] The laser-effect breathable shoe upper obtained in this embodiment uses thermoplastic elastomer yarn as the yarn material. The thermoplastic elastomer yarn and the thermoplastic resin of the adhesive layer can be tightly fused during vacuum hot pressing, which makes the color layer 203 and the aluminum plating layer 204 adhere more firmly to the shoe upper. At the same time, because the color layer 203, the aluminum plating layer 204 and the adhesive layer 205 are only fixedly adhered to the thermoplastic elastomer yarn around the ventilation holes of the shoe upper, after the base film layer 201 is peeled off, the color layer 203, the aluminum plating layer 204 and the adhesive layer 205 do not cover and block the ventilation holes of the shoe upper, thus obtaining a shoe upper with laser effect and good breathability.

[0025] The laser-effect breathable shoe upper obtained through Example 1 was tested for physical properties. Its color fastness to rubbing was grade 4 and its color fastness to washing was grade 4, which meets the requirement of the mandatory national standard (GB18401) that the color fastness index of qualified products must be greater than or equal to grade 3.

[0026] Example 2, refer to Figures 6 to 8 This is a structural schematic diagram provided by the second embodiment of the present invention. The structure of the second embodiment is largely the same as that of the first embodiment. The difference is that in this embodiment, in step S1, patterned yarn 3 is embroidered on the shoe upper body 1 by an embroidery machine. The patterned yarn 3 is made of thermoplastic polyurethane elastomer (TPU) yarn. The patterned yarn 3 can provide more patterned designs and ensure that the color layer 203, the aluminum plating layer 204, and the adhesive layer 205 are more firmly adhered to the shoe upper body 1 during hot pressing. At the same time, in step S3, the dried color layer 203 is hot-pressed with a nickel plate to imprint textures on the surface of the color layer 203. After vacuum aluminum plating, the aluminum plating layer 204 will replicate these textures, thereby producing a more obvious laser effect.

[0027] The laser-effect breathable shoe upper obtained through Example 2 has been tested for physical properties. Its color fastness to rubbing is grade 5 and its color fastness to washing is grade 5, which far meets the requirement of the mandatory national standard (GB18401) that the color fastness index of qualified products must be greater than or equal to grade 3.

[0028] The implementation principle and technical effects provided in this embodiment are the same as those in Embodiment 1. For the sake of brevity, any parts not mentioned in this embodiment can be referred to the corresponding content in Embodiment 1.

[0029] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A laser-effect breathable shoe upper, comprising: The upper body (1) has ventilation holes (101) on it. The upper body (1) is characterized by being woven from or partially woven from thermoplastic elastomer yarn, and the upper body (1) is fixedly adhered with the following from top to bottom: The color layer (203), composed of a mixture of synthetic resin and pigments, determines the color of the radiation effect; The aluminum plating layer (204) is formed by heating an aluminum wire under vacuum to melt and vaporize the aluminum wire, and the aluminum vapor is uniformly deposited on the surface of the color layer (203) to produce a laser effect; The adhesive layer (205) is made of thermoplastic resin; The color layer (203), the aluminum plating layer (204), and the adhesive layer (205) are fixedly adhered to the thermoplastic elastomer yarn without covering the ventilation holes (101) of the upper body (1).

2. The laser-effect breathable shoe upper according to claim 1, characterized in that, The thermoplastic elastomer yarn is a thermoplastic polyurethane elastomer yarn or a thermoplastic polyester elastomer yarn.

3. The laser-effect breathable shoe upper according to claim 1, characterized in that, The color layer (203) is formed by mixing one or more of nitrocellulose, acrylic resin, aldehyde-ketone resin, and petroleum resin with silicon dioxide and pigment.

4. The laser-effect breathable shoe upper according to claim 3, characterized in that, The adhesive layer (205) is formed by coating the aluminum-plated layer (204) with one or more of polypropylene resin and petroleum resin.

5. The laser-effect breathable shoe upper according to claim 4, characterized in that, The color layer (203) and the adhesive layer (205) also include a polyurethane curing agent.

6. A method for manufacturing a laser-effect breathable shoe upper as described in any one of claims 1-5, characterized in that, Includes the following steps: S1. The yarn material is made of thermoplastic elastomer yarn or partially thermoplastic elastomer yarn. The thermoplastic elastomer yarn is woven into the upper body (1) using a knitting machine or a loom. The upper body (1) is woven with ventilation holes (101). S2. A polyester film is selected as the base film layer (201). Emulsified wax is uniformly coated on the base film layer (201) and dried to form a release layer (202). S3. A color paste formed by mixing synthetic resin and pigment is uniformly coated on the release layer (202), and then dried to form a color layer (203). S4. The composite structure of the base film layer (201), release layer (202) and color layer (203) is sent into the vacuum coating chamber, and the aluminum wire is heated to melt and vaporize. The aluminum vapor is uniformly deposited on the surface of the color layer (203) to form an aluminum coating layer (204). S5. After uniformly coating thermoplastic resin on the aluminum plating layer (204) and drying it, an adhesive layer (205) is formed. The base film layer (201), release layer (202), color layer (203), aluminum plating layer (204) and adhesive layer (205) are combined to form a laser film (2) with a multi-layer structure. S6. Place the adhesive layer (205) of the laser film (2) facing the front of the shoe upper body (1) and put them into the vacuum hot press. Set the upper film temperature to 300~360℃, the lower mold temperature to 180~220℃, the vacuum negative pressure to -0.06 to -0.09MPa, and the hot pressing time to 50-60 seconds. S7. Cold setting for 20-40 seconds, the color layer (203), aluminum plating layer (204) and adhesive layer (205) are cooled and fixed to the thermoplastic elastomer yarn of the upper body (1), and the base film layer (201) is peeled off to obtain a laser-effect breathable upper. The ventilation holes (101) of the upper body (1) are not covered by the color layer (203), aluminum plating layer (204) and adhesive layer (205).

7. The method for manufacturing a laser-effect breathable shoe upper according to claim 6, characterized in that, In step S1, patterned yarn (3) is also embroidered on the main body of the shoe upper (1).

8. The method for manufacturing a laser-effect breathable shoe upper according to claim 7, characterized in that, The patterned yarn (3) is a thermoplastic polyurethane elastomer yarn or a thermoplastic polyester elastomer yarn.

9. The method for manufacturing a laser-effect breathable shoe upper according to claim 6, characterized in that, In step S3, the dried color layer (203) is hot-pressed with a nickel plate to create a texture on the surface of the color layer (203).

10. A vacuum hot press for manufacturing a laser-effect breathable shoe upper as described in any one of claims 1-5, comprising an upper hot pressing mechanism (43), a lower heating mechanism (42), and a conveying mechanism (44), characterized in that: It also includes a vacuum fixing mechanism (41), which includes a vacuum pump (411). The vacuum pump (411) is connected to a negative pressure membrane (412) through an air pipe, so that a negative pressure is formed below the negative pressure membrane (412). The negative pressure membrane (412) fixes the shoe upper body (1) and the laser film (2) through a fixing rod (413) and a hydraulic rod (414).

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