A seamless direct-charging knitted down jacket leak-proof down-proof fabric and its preparation method

Abstract

The present invention belongs to the technical field of down jacket fabrics, and specifically discloses a seamless direct-filling knitted down jacket leak-proof fabric and a preparation method thereof. The leak-proof fabric includes an inner knitted fabric and an outer knitted fabric. A filling area is separated by adhesion between the inner knitted fabric and the outer knitted fabric through a film lining; the adhesion surfaces of the film lining with the inner knitted fabric and the outer knitted fabric do not coincide; the film lining is formed by electrostatic spinning a film spinning solution on the opposite sides of the inner knitted fabric and the outer knitted fabric. The present invention can ensure that the fabric has good leak-proof performance, and due to the presence of the film lining between the inner knitted fabric and the outer knitted fabric, it has good peel strength, strong connectivity, strong wash fastness performance, and high service life.

Description

Technical Field

[0001] The present invention belongs to the technical field of down jacket fabrics, and particularly relates to a seamless direct filling knitted down jacket leak-proof fabric and a preparation method thereof. Background Art

[0002] The leak-proof performance is the main inspection index for the quality of down jacket fabrics. To achieve the leak-proof property of down jacket fabrics, currently, mainly methods such as increasing high-count yarns or preparing fabrics with high warp and weft densities, adding linings, using adhesives to bond the filling areas between fabrics, and post-finishing the fabrics such as coating or padding are adopted.

[0003] Among them, using adhesives to bond the filling areas between fabrics can ensure the seamless nature of the fabric itself. However, the bonding between fabrics involves complex physical and chemical change processes between the adhesive and the adherend, covering the mutual diffusion and mechanical coupling effects between the adhesive and the adherend. In the actual processing process, the bonding strength between fabrics is affected by factors such as the type of hot melt adhesive, the type of fabric, uniformity, the type of functional additives, and the coating layer. How to improve the bonding fastness between fabrics to ensure the long-term leak-proof property of the leak-proof fabric is one of the keys. Summary of the Invention

[0004] In order to solve the above problems, the primary object of the present invention is to provide a seamless direct filling knitted down jacket leak-proof fabric and a preparation method thereof.

[0005] The specific technical solution of the present invention includes:

[0006] The present invention provides a seamless direct filling knitted down jacket leak-proof fabric, which includes an inner knitted fabric and an outer knitted fabric. A filling area is separated by adhesion through a film-lined inner layer between the inner knitted fabric and the outer knitted fabric; the adhesion surfaces of the film-lined inner layer with the inner knitted fabric and the outer knitted fabric do not coincide.

[0007] The film-lined inner layer is formed by electrostatic spinning a film spinning solution on the opposite sides of the inner knitted fabric and the outer knitted fabric.

[0008] As a further optimized scheme of the present invention, the film spinning solution, by weight percentage, includes 20 - 30% of sericin protein aqueous solution, 20 - 30% of sodium alginate, 1 - 5% of a dispersant, 1 - 5% of a photoinitiator, and the balance is water.

[0009] As a further optimized scheme of the present invention, the inner knitted fabric and the outer knitted fabric are fabrics knitted from polyester fibers.

[0010] As a further optimized scheme of the present invention, the thickness of the film-lined inner layer is 0.5 - 2.5 mm.

[0011] The present invention also provides a method for preparing the recycled imitation down fiber as described in any one of the above, comprising the following steps:

[0012] (1) Using an electrospinning device, the prepared film-coated spinning solution is electrospun on the opposite sides of the inner knitted fabric and the outer knitted fabric respectively to form a film-coated layer, and then the film-coated layer is blown to make it in a semi-solidified state;

[0013] (2) Place the inner knitted fabric and the outer knitted fabric on both sides of an upright plate-shaped mold. The ends of the plate-shaped mold are processed into arcs, and the film-coated spinning solution is electrospun at the ends of the plate-shaped mold by an electrospinning device so that the film-coated layers on the inner knitted fabric and the outer knitted fabric are connected to form a film-coated inner lining;

[0014] (3) Irradiate the film-coated inner lining with an ultraviolet light source, and through the cross-linking and curing effect of the photoreaction, the film-coated inner lining is completed with photo-modification, and the leak-proof down-proof fabric for seamless direct-stuffed knitted down jackets can be obtained.

[0015] As a further optimized scheme of the present invention, in the step (2), the specific process parameters of electrospinning are that the voltage is 15 - 20 kV, the receiving distance is 15 - 20 cm, and the spinning speed is 5 - 10 ml / h.

[0016] As a further optimized scheme of the present invention, in the step (2), the width of the plate-shaped mold is 75 - 150 mm.

[0017] In summary, the beneficial effects of the present invention are as follows:

[0018] The present invention adhesively separates a down-filling area between the inner knitted fabric and the outer knitted fabric through a film-coated inner lining. Moreover, the film-coated inner lining is formed by taking the film-coated spinning solution as a raw material and electrospinning it on the opposite sides of the inner knitted fabric and the outer knitted fabric, which can ensure that the fabric has good down leakage prevention performance. And due to the existence of the film-coated inner lining, the inner knitted fabric and the outer knitted fabric have good peel strength, strong connectivity, strong wash fastness performance, and high service life. Specific Embodiments

[0019] The following further describes the present application in detail. It is necessary to point out here that the following specific embodiments are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0020] Example 1

[0021] This embodiment provides a seamless direct-filling knitted down jacket anti-leakage fabric, which includes an inner knitted fabric and an outer knitted fabric. The inner knitted fabric and the outer knitted fabric are fabrics knitted from polyester fibers.

[0022] A filling area is separated by adhesion between the inner knitted fabric and the outer knitted fabric through a film-lined inner layer. The adhesive surfaces of the film-lined inner layer with the inner knitted fabric and the outer knitted fabric do not coincide.

[0023] The film-lined inner layer is formed by electrospinning a film-spinning solution on the opposite sides of the inner knitted fabric and the outer knitted fabric. The film-spinning solution, by weight percentage, includes 20% sericin protein aqueous solution, 30% sodium alginate, 5% dispersant NNO, 5% photoinitiator LAP, and the balance is water.

[0024] The preparation method of the seamless direct-filling knitted down jacket anti-leakage fabric is as follows.

[0025] (1) The prepared film-spinning solution is respectively electrospun on the opposite sides of the inner knitted fabric and the outer knitted fabric by an electrospinning device to form a film layer. Subsequently, the film layer is blown to be in a semi-solidified state.

[0026] (2) The inner knitted fabric and the outer knitted fabric are placed on both sides of a vertical plate-shaped mold. The ends of the plate-shaped mold are rounded. The film-spinning solution is electrospun at the ends of the plate-shaped mold by an electrospinning device so that the film layers on the inner knitted fabric and the outer knitted fabric are connected to form a film-lined inner layer. The thickness of the film-lined inner layer is 2.5 mm. The specific process parameters of electrospinning are a voltage of 15 kV, a receiving distance of 15 cm, and a spinning speed of 5 ml / h.

[0027] (3) The film-lined inner layer is irradiated with a UV light source with a wavelength of 405 nm, and the film-lined inner layer is completed with photo-modification through the cross-linking and curing effect of photoreaction, and then the seamless direct-filling knitted down jacket anti-leakage fabric can be obtained.

[0028] Example 2

[0029] This embodiment provides a seamless direct-filling knitted down jacket anti-leakage fabric. The difference from Example 1 is that the film-spinning solution, by weight percentage, includes 30% sericin protein aqueous solution, 20% sodium alginate, 1% dispersant NNO, 1% photoinitiator LAP, and the balance is water.

[0030] The preparation method of the seamless direct-filling knitted down jacket leak-proof down-proof fabric, except for step (2), places the inner knitted fabric and the outer knitted fabric on both sides of a vertical plate-shaped mold. The end of the plate-shaped mold is treated with an arc, and the coated spinning solution is spun at the end of the plate-shaped mold by an electrospinning device to connect the coated layers on the inner knitted fabric and the outer knitted fabric to form a coated lining. The thickness of the coated lining is 0.5 mm. The specific process parameters of electrospinning are a voltage of 20 kV, a receiving distance of 20 cm, and a spinning speed of 10 ml / h.

[0031] The remaining steps are the same as those in Example 1.

[0032] Example 3

[0033] This example provides a seamless direct-filling knitted down jacket leak-proof down-proof fabric. The difference from Example 1 is that the coated spinning solution, by weight percentage, includes 25% sericin protein aqueous solution, 25% sodium alginate, 5% dispersant NNO, 5% photoinitiator LAP, and the balance is water.

[0034] The preparation method of the recycled imitation down fiber is the same as that in Example 1.

[0035] Comparative Example 1

[0036] This comparative example provides a preparation method of a seamless direct-filling knitted down jacket leak-proof down-proof fabric. A commercially available hot melt adhesive is used for bonding between the inner knitted fabric and the outer knitted fabric, and the width of the hot melt adhesive bonding is 2.5 mm.

[0037] Comparative Example 2

[0038] This comparative example provides a preparation method of a seamless direct-filling knitted down jacket leak-proof down-proof fabric. The prepared coated spinning solution is coated on the inner knitted fabric by an electrospinning device to form a coated lining. Subsequently, in the state where the coated lining is not solidified, the outer knitted fabric is covered on the coated lining. Finally, the coated lining is irradiated with an ultraviolet light source, and the coated lining is photomodified through the crosslinking and curing effect of photoreaction to obtain the seamless direct-filling knitted down jacket leak-proof down-proof fabric. The component ratio of the coated spinning solution used in this comparative example is the same as that in Example 1.

[0039] Comparative Example 3

[0040] This comparative example provides a preparation method of a seamless direct-filling knitted down jacket leak-proof down-proof fabric. The prepared coated spinning solution is coated on the inner knitted fabric by an electrospinning device to form a coated lining. Subsequently, in the state where the coated lining is not solidified, the outer knitted fabric is covered on the coated lining to obtain the seamless direct-filling knitted down jacket leak-proof down-proof fabric. The component ratio of the coated spinning solution used in this comparative example is the same as that in Example 1.

[0041] The fabrics prepared in Examples 1-3 and Comparative Examples 1-3 were subjected to anti-feather leakage test, peel strength test and wash fastness test.

[0042] Anti-feather leakage test: In the experiment, according to the national standard GB / T12705.2-2009 "Textiles - Test method for anti-feather leakage of fabrics - Part 2: Rotary box method", when the number of feather penetration of the fabric is greater than 15, it has poor anti-feather leakage property; when it is less than 15, it has anti-feather leakage property; when it is less than 5, it has good anti-feather leakage property.

[0043] Peel strength test: Referring to the standard FZ / T01085—2010 "Test method for peel strength of hot-melt bonded lining fabrics", the peel strength test was carried out. In this test, an electronic single fiber strength tester was used to test the peel strength between the inner knitted fabric and the outer knitted fabric. Among them, the sample size was 15mm×100mm, the gauge length was 10mm, and the tensile speed was 100mm / min. Each sample was tested 5 times according to the standard, and the average value was taken as the final data.

[0044] Wash fastness test: It was tested by a fully automatic shrinkage rate testing machine. The specimens were respectively placed in a horizontal drum washing machine to simulate the process of washing clothes in a washing machine, and the washing time was 40min. At present, there is no clear classification standard for the wash fastness of coated fabrics. However, according to reading literature and materials, it was found that in the relevant materials, the standard FZ / T72016-2012 stipulates that the appearance quality of knitted composite clothing fabrics after washing is not allowed to have surface blistering, degumming, cracking, and shrinkage and wrinkling. That is, after the specimens were washed 50 times respectively, the peel strength test of the specimens was carried out. Each sample was tested three times, and the experimental results were averaged and recorded.

[0045] Table 2 Statistical table of test results

[0046] ;

[0047] As can be seen from Table 1, by comparing the data results of Examples 1-3 and Comparative Examples 1-3, it can be known that in the present invention, a down filling area is separated by adhesion of a film lining between the inner knitted fabric and the outer knitted fabric, and the film lining is formed by using a film spinning solution as a raw material and electrospinning it on the opposite sides of the inner knitted fabric and the outer knitted fabric. This can ensure that the fabric has good anti-feather leakage property, and due to the presence of the film lining, the inner knitted fabric and the outer knitted fabric have good peel strength, strong connectivity, can still be maintained after 50 washes, have strong wash fastness performance, and high service life. Example

[0048] According to the above test results, it can be seen that the setting of the film lining significantly enhances the peel strength and wash fastness of the fabric piece. To explore the influence of the component ratio of the film spinning solution on the properties of recycled imitation down fibers, on the basis of the preparation method disclosed in Example 1, the component ratio of the modification agent is adjusted according to Table 2.

[0049] Table 2 Design Table of Component Ratio of Film Spinning Solution

[0050] ;

[0051] The fabrics prepared in Groups 1-11 were tested for anti-leakage of down, peel strength, and wash fastness. The results are shown in Table 3.

[0052] Table 3 Statistical Table of Test Results

[0053] ;

[0054] It can be seen from Table 3 that the component ratio of the film spinning solution affects the peel strength and wash fastness between the inner knitted fabric and the outer knitted fabric. From the data comparison in the table, it can be seen that as the ratio of the sericin protein aqueous solution increases, the peel strength and wash fastness between the inner knitted fabric and the outer knitted fabric do not increase but decrease. When the weight percentage of the sericin protein aqueous solution is 25%, the peel strength and wash fastness are better. In addition, the addition of sodium alginate helps to improve the peel strength and wash fastness of the fabric. Also, from the data in the table, it can be seen that when the weight percentage of the sericin protein aqueous solution is constant, as the weight percentage of sodium alginate increases, the wash fastness of the fabric will decrease significantly, which is not conducive to the lasting performance of the anti-leakage of down property of the fabric.

[0055] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A seamless direct-charging knitted down jacket leak-proof down-proof fabric, comprising an inner knitted fabric and an outer knitted fabric, characterized in that, A filling area is separated by adhesion between the inner knitted fabric and the outer knitted fabric through a film-lined inner layer; the adhesion surfaces of the film-lined inner layer with the inner knitted fabric and the outer knitted fabric do not coincide; The film-lined inner layer is formed by electrospinning a film-spinning solution on the opposite sides of the inner knitted fabric and the outer knitted fabric. The film-spinning solution, by weight percentage, includes 20-30% aqueous sericin solution, 20-30% sodium alginate, 1-5% dispersant, 1-5% photoinitiator, and the balance is water; The preparation method of the seamless direct-filling knitted down jacket leak-proof fabric includes the following steps: (1) The prepared film-spinning solution is electrospun on the opposite sides of the inner knitted fabric and the outer knitted fabric respectively by an electrospinning device to form a film layer, and then the film layer is blown to be in a semi-solidified state; (2) The inner knitted fabric and the outer knitted fabric are placed on both sides of a vertical plate-shaped mold. The ends of the plate-shaped mold are rounded, and the film-spinning solution is electrospun at the ends of the plate-shaped mold by an electrospinning device so that the film layers on the inner knitted fabric and the outer knitted fabric are connected to form a film-lined inner layer; (3) The film-lined inner layer is irradiated with an ultraviolet light source, and the film-lined inner layer is photomodified through the cross-linking and curing action of photoreaction to obtain the seamless direct-filling knitted down jacket leak-proof fabric.

2. The seamless direct charging knitted down jacket leak-proof down-proof fabric according to claim 1, characterized in that The inner knitted fabric and the outer knitted fabric are fabrics knitted from polyester fibers.

3. A seamless direct charging knitted down jacket leak-proof down-proof fabric according to claim 1, characterized in that, The thickness of the film-lined inner layer is 0.5-2.5 mm.

4. A seamless direct-charging knitted down jacket leak-proof down-proof fabric according to claim 1, characterized in that In the step (2), the specific process parameters of electrospinning are that the voltage is 15-20 kV, the receiving distance is 15-20 cm, and the spinning speed is 5-10 ml / h.

5. A seamless direct charging knitted down jacket leak-proof down-proof fabric according to claim 1, characterized in that, In the step (2), the width of the plate-shaped mold is 75-150 mm.