Yarn with shape memory and manufacturing method and application thereof

Abstract

The invention relates to the technical field of yarn products and production thereof, in particular to yarn with shape memory and a manufacturing method and application thereof, the yarn structurally comprises mother yarn wrapped in the middle and a wrapping layer wrapping the mother yarn, and the wrapping layer is made of thermoplastic polyester materials. The method comprises the following steps: carrying out electrostatic treatment to enable the surfaces of mother yarns to have static electricity; electrostatic powder adsorption treatment is carried out, so that a layer of powdered coating layer raw material is adsorbed on the outer surface of the mother yarn; heating and wrapping the mother yarn to form a wrapping layer, and melting the powder and fusing and combining the powder with the wrapping layer in the heating and wrapping mother yarn treatment; and cooling treatment is carried out, so that the coating layer and the powder are fused and solidified on the mother yarn. The yarn structure material can enable the fabric to have better wear resistance and slip resistance, the manufacturing method can enable the manufactured yarn structure to be centered in core wrapping and stable in fusion connection, and the yarn and the fabric thereof can expand material application in different fields and can be applied to sole sheets.

Description

Technical Field

[0001] The invention relates to the field of yarn products and production technology applications thereof. Background Art

[0002] With the continuous development of new material technology and the demand for product innovation in various industries, the use of yarns and their fabrics is also constantly exploring new uses, so new structures and materials are constantly being developed and produced. Among the existing yarn and wire products that can be used for knitting and weaving, there are not many core-spun yarns with an intermediate core wire and an outer sheath. The requirements for the material, structure, and performance of the core-spun yarn vary depending on the application product of the core-spun yarn.

[0003] In the field of sole materials, the main considerations for material selection include support, comfort, anti-slip, wear resistance, etc. Common materials include polyurethane molded soles, etc. The application of yarn and its fabric in sole materials is still blank. In view of this, the inventor of this case has devoted himself to research in this application field, improved existing products, and conducted trial production tests, which led to the creation of this case. Summary of the invention

[0004] One of the purposes of the present invention is to provide a shape memory yarn which can make its fabric have better wear resistance and anti-slip performance and can expand the application in different fields.

[0005] The second object of the present invention is to provide a method for manufacturing the shape memory yarn, through which the yarn product can be applied for the above purpose and improve the above performance.

[0006] The third purpose of the present invention is to provide an application of a shape memory yarn, and its purpose is to disclose a new use of the above-mentioned shape memory yarn in the field of wear-resistant and anti-slip materials such as soles and uppers.

[0007] To achieve the above-mentioned purpose, the technical solution of the present invention is: a shape memory yarn, whose structure includes a wrapped mother yarn and a coating layer wrapped outside the mother yarn, and the coating layer is made of one or a combination of modified X-PET, TPEE, TPU, TPO, TPS, TPA.

[0008] The mother yarn is made of one or a combination of PET, TPU, TPEE, PP, PA, glass fiber, carbon fiber, and metal wire; and / or the preparation material of the coating layer includes TPEE, TPU, polyester polyol, MPU, TPR, and inorganic filler.

[0009] Among the materials for preparing the coating layer, TPEE accounts for 55%-80% of the total materials for preparing the coating layer, TPU accounts for 1%-10% of the total materials for preparing the coating layer, polyester polyol accounts for 1%-10% of the total materials for preparing the coating layer, MPU accounts for 1%-10% of the total materials for preparing the coating layer, TPR accounts for 1%-10% of the total materials for preparing the coating layer, and inorganic fillers account for 1%-5% of the total materials for preparing the coating layer.

[0010] Among the materials for preparing the coating layer, TPEE accounts for 72% of the total materials for preparing the coating layer, TPU accounts for 3% of the total materials for preparing the coating layer, polyester polyol accounts for 5.5% of the total materials for preparing the coating layer, MPU accounts for 10% of the total materials for preparing the coating layer, TPR accounts for 5% of the total materials for preparing the coating layer, and inorganic fillers account for 4.5% of the total materials for preparing the coating layer.

[0011] Among the materials for preparing the coating layer, TPEE accounts for 68% of the total materials for preparing the coating layer, TPU accounts for 7% of the total materials for preparing the coating layer, polyester polyol accounts for 5.5% of the total materials for preparing the coating layer, MPU accounts for 10% of the total materials for preparing the coating layer, TPR accounts for 5% of the total materials for preparing the coating layer, and inorganic fillers account for 4.5% of the total materials for preparing the coating layer.

[0012] The percentage of the coating layer material to the mother yarn material is not less than 60%.

[0013] A method for manufacturing a shape memory yarn, the method comprising the following steps:

[0014] S1, subjecting the mother yarn to an electrostatic treatment so that the surface of the mother yarn is electrostatically charged;

[0015] S2, subjecting the mother yarn with static electricity to an electrostatic adsorption powder treatment, so that a layer of powder is adsorbed on the outer surface of the mother yarn, and the powder is a powdered coating layer raw material;

[0016] S3, heating and coating the mother yarn with the powder adsorbed thereon to form a coating layer, wherein the coating layer is prepared by heating and melting the raw material of the coating layer, and is extruded and coated on the mother yarn with the powder adsorbed thereon during the heating and coating process, and the powder is melted and combined with the coating layer during the heating and coating process;

[0017] S4, cooling the mother yarn covered with the coating layer, so that the coating layer and the powder are melted and solidified on the mother yarn.

[0018] The electrostatic treatment method in S1 is to transport the mother yarn to an electrostatic treatment device so that static electricity is generated by friction with the mother yarn.

[0019] The shape memory yarn application as described above is made into a sheet or fabric through a wiring process, a knitting process, a weaving process and / or an embroidery process.

[0020] The sheet material or fabric is processed into a sole component that plays a role of wear resistance and anti-slip in the sole material and an upper component that plays a role of enhanced wear resistance in the upper fabric.

[0021] By adopting the above technical scheme, the beneficial effects of the present invention are as follows: the above yarn structure material is composed of a polymer and a reinforcing fiber, and the mother yarn can select the material according to the application performance requirements to play a reinforcing role, and the covering layer is made of elastic materials such as thermoplastic polyester, which can make the yarn have good elastic recovery performance, wear resistance and thermoplasticity, etc., so that it can achieve a processing effect with shape memory function, and the yarn made by the above-mentioned further ratio has good toughness and high strength, and has excellent effects in wear resistance and anti-slip effects. This yarn can also be processed into the required shape for application according to the needs of use, and the material color can be changed according to the design needs, so it has more advantages in designing and developing and expanding space ideas for application.

[0022] Compared with the manufacturing process of other existing core-spun yarns, the above-mentioned manufacturing method adds the pre-static charging and electrostatic adsorption powdering of the coating layer raw material treatment to the mother yarn, and then cools the coated mother yarn after heating. This can make the mother yarn in the core-spun yarn have a higher centering consistency as a whole. This manufacturing method effectively solves the problems of eccentricity and non-centering of the mother yarn and the stability of the connection between the coating layer and the mother yarn in the prior art, thereby improving the quality of the core-spun yarn and making the products made therefrom more durable.

[0023] The yarn obtained by the above-mentioned manufacturing method can be made into sheets or fabrics through wiring technology, knitting technology, weaving technology and / or embroidery technology, such as fabric fabrics or fabric fabrics processed into sheets, etc. This kind of fabric or sheet has good low-temperature folding resistance, support, wear resistance, not easy to pilling and yarn breakage, high tear strength, wear resistance and non-slip properties, and can be directly woven according to the design or with different appearance effects and performance differences such as different weaving structures, colors, pattern structures, elasticity and sparseness, etc., and does not need to be processed by molds and other processing procedures, simplifying the production and processing procedures of existing products in the same field, etc., which is conducive to the expansion of product design thinking and product application expansion, and is conducive to the application in sole materials, medical materials, furniture materials, automotive materials, outdoor products materials, etc.

[0024] In summary, the above-mentioned multiple purposes of the present invention are achieved. DETAILED DESCRIPTION

[0025] In order to further explain the technical solution of the present invention, the present invention is described in detail below through specific embodiments.

[0026] The present embodiment discloses a shape memory yarn, which comprises a mother yarn 1 wrapped in the middle and a coating layer 2 wrapped outside the mother yarn 1. To achieve the yarn strength in the above-mentioned purpose, the mother yarn of the present invention preferably adopts one or a combination of PET (polyester), TPU (polyurethane), TPEE (polyether ester elastomer), PP (polypropylene), PA (nylon), glass fiber, carbon fiber, and metal wire. According to the application requirements of the yarn, the mother yarn can be a single yarn or a plurality of strands of parallel yarns to form the mother yarn, or a plurality of twisted yarns to form the mother yarn. Also to achieve the above-mentioned purpose, the coating layer 2 of the present embodiment is made of modified X-PET, TPEE (thermoplastic polyester elastomer), TPU (thermoplastic polyurethane), TPO (thermoplastic polyolefin elastomer), TPS (thermoplastic polystyrene elastomer), TPA (thermoplastic polyamide elastomer) One or several combinations of elastomer can be selected according to the properties of the yarn to achieve coatings with different physical properties. In addition, in order to achieve the wear-resistant and anti-slip effect in the above-mentioned purpose, it can be applied to the sole material, for example, and the percentage of the coating layer 2 material to the mother yarn 1 material can be further preferably set at a ratio of not less than 60% of the coating layer material. The obtained yarn material can show excellent wear-resistant and anti-slip effects. The specific application in different materials can also be adjusted according to the production application needs to adjust the required effect. The above-mentioned publicly used coating layer material has the characteristics of high elasticity, high strength, wear resistance, anti-slip and anti-yellowing, which is conducive to improving product quality.

[0027] In the embodiment of the present invention, the yarn is applied to the sole sheet, and in particular, the application of the wear-resistant and non-slip outsole material for contacting the ground in the sole sheet is used as an example, and a material ratio that can reflect the product performance effect is disclosed, but the ratio is disclosed and not limited to the application on the sole, and can also be applied to other product applications with the same or similar wear-resistant and non-slip coefficients, such as the material application on bags and household products. The preferred coating layer of the present embodiment includes TPEE (polyether ester elastomer), TPU (thermoplastic polyurethane), MPU (polyurethane rubber), TPR (toughening agent) and polyester polyol and an inorganic filler that improves crystallization and dimensional stability, and the polyester polyol is a reactive polyester polyol as a formula compatibilizer, and the polyether ester elastomer is micro-mixed with thermoplastic polyurethane, polyurethane rubber, and polyurethane rubber under double screw hot kneading, and the inorganic filler can improve crystallization and dimensional stability. The preferred material ratio is as follows: TPEE accounts for 55%-80% of the total amount of materials for preparing the coating layer, TPU accounts for 1%-10% of the total amount of materials for preparing the coating layer, polyester polyol accounts for 1%-10% of the total amount of materials for preparing the coating layer, MPU accounts for 1%-10% of the total amount of materials for preparing the coating layer, TPR accounts for 1%-10% of the total amount of materials for preparing the coating layer, and inorganic fillers account for 1%-5% of the total amount of materials for preparing the coating layer.

[0028] After trial production tests, the preferred percentage of the coating material to the mother yarn material in this embodiment is not less than 60%, and within the above-mentioned coating ratio range, a variety of different coarseness and fineness trial production (as listed in the following table) can achieve an ideal yarn strength, wear resistance and other properties.

[0029]

[0030]

[0031] In actual production, the selection can be made according to the purpose. The thicker the mother yarn coating layer, the higher its denier D, the higher the wear resistance and adhesion. The smaller the total denier number, the finer the yarn diameter, which is suitable for fine needle technology and the finer the fabric structure. In view of the wear resistance requirements, a high total denier number yarn composition configuration can be selected, such as 1200D-3000D. In addition, the ratio of the above-mentioned coating layer material is adjusted within the ratio range to obtain the 4 ratio embodiments in the following table for trial production to obtain the material.

[0032]

[0033] The yarn products obtained by the above-mentioned ratio have better performance in terms of strength, wear resistance, anti-slip and other properties of the yarn and its products. Among them, the ratio of Example 3, the amount of each component achieves a better interface bonding between materials during production and processing, the formula is optimal, meets the processing requirements, and has the best yarn-forming properties, which can be suitable for a variety of product applications. Example 2 has a high MPU content and can be coated into yarn. The ratio of Example 1 has a lower MPU content than that of Example 3, and the yarn surface is rough. The TPU content of Example 4 will cause surface wrinkling, which is suitable for product applications without requirements for appearance smoothness.

[0034] The yarn produced by the above disclosed material formula ratio of the present invention has the following advantages: 1. Toughness and resilience: In addition to excellent toughness, impact resistance and creep resistance, it also has excellent bending fatigue resistance and spring-like performance. 2. Super temperature resistance: In particular, the modified X-PET has excellent temperature resistance, not only can it still have good mechanical properties at high temperatures, but it can also maintain elasticity at low temperatures of -15°C. 3. Chemical resistance: resistant to oil, fuel, hydrocarbon solvents and other chemicals.

[0035] The above-mentioned yarn is made into sheets or fabrics through wiring process, knitting process, weaving process and / or embroidery process. For example, knitted fabrics are obtained by weaving through knitting machines or weaving machines such as warp knitting machines, horizontal looms, shuttle looms, etc. The above-mentioned wiring process refers to some sheets or fabrics obtained by winding the pulling lines on the base for processing. The above-mentioned embroidery process, such as embroidery and coiling process using computer embroidery machines, computer coiling machines, etc., can obtain sheets or fabrics. The weaving structure produced by these processes can realize the surface texture structure of the fabric and other pattern structures that are difficult or impossible to achieve with molds. Therefore, this kind of fabric can provide a larger space for expanding design ideas.

[0036] The following table shows the test results of abrasion resistance test on the fabrics obtained in the pilot test.

[0037]

[0038] In the various wear-resistant tests in the above table, the test results all reached a relatively ideal test result, such as the test method ASTM D3884, the test condition H22, the wear-resistant test result in 500g is greater than 500 turns, which shows that the wear resistance is excellent, and it is particularly suitable for the application of sole materials. Its application can also further improve the wear resistance and the structural strength of the product through yarn configuration and braided structure. In the application of shoe outsole materials that are in contact with the ground, the material can break through the existing sole material thickness and achieve ultra-thin application, with reinforced structure, good wear resistance, high flexibility, conducive to one-piece molding, can match various shoemaking processes and excellent elasticity. The yarn and its fabric or sheet of the present invention can be used in the field of sole materials to make the sole parts that play a wear-resistant and non-slip role in the sole materials, and can also be processed into the upper fabric to play a role in strengthening the wear-resistant upper parts, and can also be applied to other sports goods, furniture, textiles, other shoe materials, leisure products, vehicles, outdoor products, medical and other fields.

[0039] In the prior art, there are some disclosed methods for producing and manufacturing core-spun wires. However, the application of these existing methods has the problem that the combination of the mother yarn and the coating layer is unstable, and the mother yarn is relatively offset during the coating process, that is, eccentric displacement, and even the state of the mother yarn cannot be ideally coated. This situation will cause easy wear for some applications (such as the application of making sole materials), affecting product durability and product appearance. In response to this problem, the inventor has studied and improved the existing production and manufacturing methods to effectively solve the problem. Specifically, a method for manufacturing a shape memory yarn includes the following steps:

[0040] S1. Performing electrostatic treatment on the mother yarn so that the surface of the mother yarn is charged with static electricity. During production, the mother yarn is usually pulled out from the original yarn roll. In this embodiment, the electrostatic treatment process uses friction to generate static electricity. Therefore, the mother yarn is pulled out from the original yarn roll and transported to the electrostatic treatment device, which generates static electricity by friction on the mother yarn.

[0041] S2. The mother yarn with static electricity is subjected to electrostatic adsorption powder treatment so that a layer of powder is adsorbed on the outer surface of the mother yarn, and the powder is the powdered coating layer raw material; the mother yarn in the above S1 is transported to the electrostatic treatment device for treatment with static electricity and then transported to the electrostatic adsorption powder treatment device of this step, the device contains the above-mentioned powdered coating layer raw material, and the powder of the mother yarn with static electricity is electrostatically adsorbed when it enters the device, so that the outer surface of the mother yarn is coated with a layer of powdered coating layer raw material, and the powder is transported out after electrostatic adsorption.

[0042] S3, the mother yarn adsorbed with powder is subjected to heating and coating treatment to form a coating layer, the coating layer is prepared by the raw material of the coating layer and heated and melted, in the heating and coating mother yarn treatment, the molten coating layer raw material is extruded and coated on the outside of the mother yarn adsorbed with powder through the extrusion coating device, and the heating of the heating system in the heating and coating mother yarn treatment will melt the powder, so that it is melted and combined with the coating layer, and at the same time has a tighter connection with the surface of the mother yarn. At this point, compared with the existing core-wrapping technology production method, the pre-treatment of the electrostatic powderization of the mother yarn is added, and the powder layer on the surface of the mother yarn is wrapped and fused to form a restriction on the mother yarn, and the mother yarn is not easy to deviate, so it effectively solves the production problem of eccentricity and non-centering, and the treatment method is easy to operate and implement without causing problems such as damage to the mother yarn.

[0043] S4, cooling the mother yarn covered with the coating layer so that the coating layer and the powder are melted and solidified on the mother yarn; that is, after the mother yarn covered with the coating layer is shaped by the cooling system in the cooling treatment process, a shape memory yarn of the present invention is obtained, and after shaping, the yarn can be output and wound and packaged through the traction and winding mechanism.

[0044] The above embodiments do not limit the product form and style of the present invention. Any appropriate changes or modifications made by ordinary technicians in the relevant technical field should be deemed to be within the patent scope of the present invention.

Claims

1. A shape memory yarn, comprising a mother yarn wrapped in the middle and a covering layer wrapped outside the mother yarn, characterized in that: The coating layer is made of one or a combination of modified X-PET, TPEE, TPU, TPO, TPS, and TPA.

2. A shape memory yarn as claimed in claim 1, characterized in that: The mother yarn is made of one or a combination of PET, TPU, TPEE, PP, PA, glass fiber, carbon fiber, and metal wire; And / or, the coating layer is prepared from materials including TPEE, TPU, polyester polyol, MPU, TPR and inorganic filler.

3. A shape memory yarn as claimed in claim 2, characterized in that: Among the materials for preparing the coating layer, TPEE accounts for 55%-80% of the total materials for preparing the coating layer, TPU accounts for 1%-10% of the total materials for preparing the coating layer, polyester polyol accounts for 1%-10% of the total materials for preparing the coating layer, MPU accounts for 1%-10% of the total materials for preparing the coating layer, TPR accounts for 1%-10% of the total materials for preparing the coating layer, and inorganic fillers account for 1%-5% of the total materials for preparing the coating layer.

4. A shape memory yarn as claimed in claim 3, characterized in that: Among the materials for preparing the coating layer, TPEE accounts for 72% of the total materials for preparing the coating layer, TPU accounts for 3% of the total materials for preparing the coating layer, polyester polyol accounts for 5.5% of the total materials for preparing the coating layer, MPU accounts for 10% of the total materials for preparing the coating layer, TPR accounts for 5% of the total materials for preparing the coating layer, and inorganic fillers account for 4.5% of the total materials for preparing the coating layer.

5. The shape memory yarn according to claim 3, characterized in that: Among the materials for preparing the coating layer, TPEE accounts for 68% of the total materials for preparing the coating layer, TPU accounts for 7% of the total materials for preparing the coating layer, polyester polyol accounts for 5.5% of the total materials for preparing the coating layer, MPU accounts for 10% of the total materials for preparing the coating layer, TPR accounts for 5% of the total materials for preparing the coating layer, and inorganic fillers account for 4.5% of the total materials for preparing the coating layer.

6. A shape memory yarn according to any one of claims 1 to 5, characterized in that: The percentage of the coating layer material to the mother yarn material is not less than 60%.

7. A method for manufacturing a shape memory yarn, characterized in that: A method for manufacturing a shape memory yarn as described in any one of claims 1 to 6 comprises the following steps: S1, subjecting the mother yarn to an electrostatic treatment so that the surface of the mother yarn is charged with static electricity; S2, subjecting the mother yarn charged with static electricity to an electrostatic adsorption powder treatment so that a layer of powder is adsorbed on the outer surface of the mother yarn, wherein the powder is a powdered coating layer raw material; S3, subjecting the mother yarn adsorbed with powder to a heating and coating mother yarn treatment to form a coating layer, wherein the coating layer is a coating layer raw material prepared and heated to melt, and is extruded and coated on the outside of the mother yarn adsorbed with powder during the heating and coating mother yarn treatment, wherein the powder is melted and fused with the coating layer during the heating and coating mother yarn treatment; S4, subjecting the mother yarn coated with the coating layer to a cooling treatment so that the coating layer and the powder are melted and solidified on the mother yarn.

8. A method for manufacturing a shape memory yarn as claimed in claim 7, characterized in that: The electrostatic treatment method in S1 is to transport the mother yarn to an electrostatic treatment device so that static electricity is generated by friction with the mother yarn.

9. An application of a shape memory yarn, characterized in that: The application of the shape memory yarn or the yarn obtained by the method for manufacturing the shape memory yarn as described in any one of claims 1 to 8 is to make the yarn into a sheet or fabric through a wiring process, a knitting process, a weaving process and / or an embroidery process.

10. The use of a shape memory yarn as claimed in claim 9, characterized in that: The sheet material or fabric is processed into a sole component that plays a role of wear resistance and anti-slip in the sole material and an upper component that plays a role of enhanced wear resistance in the upper fabric.

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