Down-running-resistant micro-expansion line of down jacket and preparation method thereof

Abstract

The invention discloses a down-running-resistant micro-expansion yarn of a down jacket and a preparation method. The preparation method comprises the following steps: S1, blending polyester staple fibers and PVA fibers according to a mass ratio of 9: 1 to prepare single yarns; s2, the single yarn is coated with a fluorocarbon modified polyurethane auxiliary agent and then baked; s3, the single yarn is coated with propylene glycol phthalate fibers; s4, the coated wire rod is repeatedly coated with the fluorocarbon modified polyurethane auxiliary agent, and baking is carried out; s5, coating the wires with polyester staple fibers; s6, treating the PVA fibers in a solution containing an electrostatic agent and water-based silicone wax to melt the PVA fibers to form micro-gaps, and baking the PVA fibers; s7, coating the fluorocarbon modified polyurethane auxiliary agent again and baking the fluorocarbon modified polyurethane auxiliary agent; and S8, coating the surface of the wire rod with an antistatic silicone wax and silicone oil mixed auxiliary agent to complete the preparation, thereby obtaining the down-running-resistant micro-expansion wire of the down jacket. According to the down-running-resistant micro-expansion thread of the down jacket, needle holes can be blocked through the micro-expansion effect of the down-running-resistant micro-expansion thread after sewing, and the down running problem is relieved and even avoided.

Description

Technical Field

[0001] The invention relates to a textile material, in particular to an anti-down-running micro-swelling yarn for down jackets and a preparation method thereof. Background Art

[0002] Traditional down jackets generally have the technical defect of down drilling in the sewing parts. The main reason is that the diameter of the stitch hole formed when the sewing needle pierces the fabric is significantly larger than the diameter of the sewing thread itself, or the stitch hole is enlarged due to the pulling caused by sewing.

[0003] The most common method to improve the problem of down penetration in the prior art is to add anti-down strips on the inside of the sewing seams, but this will increase the complexity of the process and the material cost.

[0004] It is particularly noteworthy that there is a physical gap between conventional sewing thread and the needle hole after sewing, which is difficult to overcome, and this gap is difficult to be completely closed through existing processing technology. Summary of the Invention

[0005] In view of the shortcomings of the existing technology, the purpose of the present invention is to provide a down jacket anti-down running micro-expansion thread and a preparation method, which can seal the pinholes after sewing through its own micro-expansion effect, thereby alleviating or even avoiding the down running problem.

[0006] To achieve the above object, the present invention provides the following technical solutions: A down jacket anti-down running micro-swelling thread, comprising A single yarn matrix formed by blending polyester staple fiber and PVA fiber; The surface of the single yarn matrix is ​​sequentially coated with a composite structure formed by a propylene glycol phthalate fiber layer and a polyester staple fiber layer; A gap space formed by melting the PVA fibers is provided between the polyester staple fiber layer and the single yarn matrix; The propylene glycol phthalate fiber layer is used for elastic recovery and blocking needle holes after being compressed and thinned during sewing.

[0007] As a further improvement of the present invention, the basic single yarn is formed by blending 90% polyester staple fiber and 10% PVA fiber.

[0008] As a further improvement of the present invention, the surface of the composite structure is coated with at least three layers of fluorocarbon-modified polyurethane additive layers.

[0009] As a further improvement of the present invention, three layers of fluorocarbon modified polyurethane additives are respectively located on the surface of the single yarn substrate, the surface of the propylene glycol phthalate fiber layer, and the surface of the polyester staple fiber.

[0010] As a further improvement of the present invention, the covering fiber of the polyester staple fiber layer is ultra-fine denier polyester fiber.

[0011] A method for preparing a down jacket anti-down running micro-swelling yarn comprises the following steps S1. Blend polyester staple fiber and PVA fiber in a mass ratio of 9:1 to prepare a single yarn; S2. Coat the single yarn with a fluorocarbon-modified polyurethane additive and bake it; S3. Cover the single yarn with propylene glycol phthalate fiber; S4. Repeat the coating of the coated wire with a fluorocarbon-modified polyurethane additive and bake it; S5. Cover the wire with polyester staple fiber; S6. Treat the wire in a solution containing an antistatic agent and aqueous silicone wax to melt the PVA fiber to form micro-gaps, and bake it; S7. Apply the fluorocarbon-modified polyurethane additive again and bake it; S8. Coat the surface of the wire with an antistatic silicone wax and silicone oil mixture to complete the wire preparation; S9. The prepared wire was placed in a freezer for 30 minutes for shrinkage; S10. The cooled wire is shaped by hot-melt mixing additives.

[0012] As a further improvement of the present invention, the baking method in S2, S4 and S6 is baking in an oven at 45 degrees for 1 hour.

[0013] As a further improvement of the present invention, the baking method in S7 is an oven at 40 degrees for 1.5 hours.

[0014] As a further improvement of the present invention, the treatment in the solution containing the electrostatic agent and the aqueous silicone wax in S6 is performed by adding the electrostatic agent and the aqueous silicone wax to boiling water at 130° C. and keeping the temperature for 1-1.5 hours.

[0015] The present invention has the beneficial effect of producing minimal hairiness in the sewing thread, which reduces the temperature generated by the needle and thread during high-speed sewing. During high-speed sewing, the stress-bearing thread squeezes the gaps between the melted PVA fibers. Simultaneously, the propylene glycol phthalate fibers become thinner due to the stress. After sewing, they slowly rebound and thicken, blocking the needle holes and preventing down from escaping. The fluorocarbon-modified polyurethane additive and the antistatic silicone wax and silicone oil mixed additive work together to reduce down escaping caused by physical factors such as static electricity. DETAILED DESCRIPTION

[0016] Raw materials preparation: Polyester staple fiber (90%), PVA fiber (10%); fluorocarbon modified polyurethane additives; ultrafine denier polyester fiber (referring to polyester fiber below 0.55dtex); propylene glycol phthalate fiber; antistatic silicone wax and silicone oil mixed additives; static agent, water-based silicone wax.

[0017] Preparation method: The first step is to select polyester staple fiber (90%) + PVA fiber (10%) to blend into single yarn; In the second step, the single yarn is coated with a fluorocarbon-modified polyurethane additive; The third step is to bake in an oven at 45 degrees for 1 hour; The fourth step is to coat it with propylene glycol phthalate fiber; Step 5: Apply fluorocarbon modified polyurethane additive again; Step 6: Bake in oven at 45 degrees for 1 hour; Step 7: Wrap it with polyester staple fiber; Step 8: Add 130-degree boiling water, anti-static agent and water-based silicone wax and keep warm for 1-1.5 hours; at this time, the PVA fiber will melt and create a gap in the middle of the sewing thread; Step 9: Place in oven at 45 degrees for 1 hour. Step 10: Apply fluorocarbon modified polyurethane additive again; Step 11: Bake in oven at 40 degrees for 1.5 hours; Step 12: Apply antistatic silicone wax and silicone oil mixed additive; Step 13: Place the prepared wire into a freezer for 30 minutes for shrinkage. In the fourteenth step, the cooled wire is shaped by hot-melt mixing additives.

[0018] After the above steps, a down jacket anti-down running micro-bulking yarn can be obtained, wherein the micro-bulking yarn includes a single yarn matrix formed by blending polyester staple fiber and PVA fiber; The surface of the single yarn matrix is ​​sequentially coated with a composite structure formed by a propylene glycol phthalate fiber layer and a polyester staple fiber layer; A gap space formed by melting the PVA fibers is provided between the polyester staple fiber layer and the single yarn matrix; The propylene glycol phthalate fiber layer is used for elastic recovery and blocking needle holes after being compressed and thinned during sewing.

[0019] The surface of the single yarn matrix, the surface of the propylene glycol phthalate fiber layer and the surface of the polyester staple fiber are respectively coated with fluorocarbon modified polyurethane auxiliary agent layers.

[0020] The sewing thread produced with this solution has a slight amount of hairiness, which reduces the temperature generated between the needle and thread during high-speed sewing. During high-speed sewing, the stress on the thread squeezes the gaps between the melted PVA fibers. At the same time, the propylene glycol phthalate fibers also become thinner due to the stress. After sewing is completed, they slowly rebound and thicken, blocking the needle hole.

[0021] After the down jacket is sewn with this sewing thread, the originally shrunken thread can be expanded by ironing, further improving the anti-down running effect.

[0022] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, various improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A down jacket anti-down running micro-swelling thread, characterized in that: include A single yarn matrix formed by blending polyester staple fiber and PVA fiber; The surface of the single yarn matrix is ​​sequentially coated with a composite structure formed by a propylene glycol phthalate fiber layer and a polyester staple fiber layer; A gap space formed by melting the PVA fibers is provided between the polyester staple fiber layer and the single yarn matrix; The propylene glycol phthalate fiber layer is used for elastic recovery and blocking needle holes after being compressed and thinned during sewing.

2. The anti-down-running micro-swelling yarn for down jackets according to claim 1, characterized in that: The basic single yarn is a blend of 90% polyester staple fiber and 10% PVA fiber.

3. The anti-down-running micro-swelling yarn for down jackets according to claim 2, characterized in that: The surface of the composite structure is coated with at least three layers of fluorocarbon modified polyurethane auxiliary agent layers.

4. The anti-down-running micro-swelling yarn for down jackets according to claim 3, characterized in that: The three fluorocarbon modified polyurethane additive layers are respectively located on the surface of the single yarn matrix, the surface of the propylene glycol phthalate fiber layer, and the surface of the polyester staple fiber.

5. The anti-down-running micro-swelling yarn for down jackets according to claim 3, characterized in that: The covering fibers of the polyester staple fiber layer are ultra-fine denier polyester fibers.

6. A method for preparing the anti-down-running micro-swelling yarn for down jackets according to any one of claims 1 to 5, characterized in that: Includes the following steps S1. Polyester staple fiber and PVA fiber were blended in a 9:1 mass ratio to produce a single yarn. S2. The single yarn was coated with a fluorocarbon-modified polyurethane additive and then baked. S3. The single yarn was coated with propylene glycol phthalate fiber. S4. The coated wire is repeatedly coated with a fluorocarbon-modified polyurethane additive and baked. S5. The wire is coated with polyester staple fibers. S6. The PVA fibers are melted in a solution containing an antistatic agent and aqueous silicone wax to form micro-gaps, and then baked. S7. The fluorocarbon-modified polyurethane additive is applied again and baked. S8. The wire surface is coated with an antistatic silicone wax and silicone oil mixture to complete the wire preparation. S9. The prepared wire was placed in a freezer for 30 minutes for shrinkage; S10. The cooled wire is shaped by hot-melt mixing additives.

7. The preparation method according to claim 6, characterized in that The baking method in S2, S4 and S6 is baking in an oven at 45 degrees for 1 hour.

8. The preparation method according to claim 6, characterized in that The baking method in S7 is oven at 40 degrees for 1.5 hours.

9. The preparation method according to claim 6, characterized in that The treatment method in S6 in the solution containing the electrostatic agent and the aqueous silicone wax is to add the electrostatic agent and the aqueous silicone wax to boiling water at 130°C and keep the temperature for 1-1.5 hours.