CN114847554A - Sewing down penetration preventing down jacket and manufacturing method thereof - Google Patents
Sewing down penetration preventing down jacket and manufacturing method thereof Download PDFInfo
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- CN114847554A CN114847554A CN202210620300.4A CN202210620300A CN114847554A CN 114847554 A CN114847554 A CN 114847554A CN 202210620300 A CN202210620300 A CN 202210620300A CN 114847554 A CN114847554 A CN 114847554A
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Images
Classifications
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Landscapes
- Engineering & Computer Science (AREA)
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Abstract
The invention relates to a sewing down feather penetration prevention down jacket and a manufacturing method thereof.A spherical modified expansion block is arranged on the surface of an inner layer, the modified expansion block is made of a thermal expansion cold shrinkage material, the elastic ductility is good, when the modified expansion block expands, gaps among monomers of the modified expansion block can be reduced, the heat loss can be greatly reduced, the heat preservation is good, and when the modified expansion block contracts, the integral air permeability of the down jacket can be improved, so that the applicability is wide; through sewing twice on the surface fabric, utilize secondary seam portion, on the one hand, play the effect of consolidating primary seam portion, on the other hand, the sewing density of secondary seam portion is greater than the sewing density of primary seam portion, can effectually prevent that the eiderdown filler from boring the fine hair, and the nature reinforcing is dragged in addition to utilize hot press unit, the modified inflation piece of hot melt for the hot pressing position forms hot pressing sealing portion, the effect of playing sealed group's surface fabric that can be fine, anti brill fine hair nature improves by a wide margin.
Description
Technical Field
The invention belongs to the technical field of down jackets, and particularly relates to a sewn down jacket capable of preventing down penetration and a manufacturing method thereof.
Background
The jacket filled with the down filling material in the down jacket has a huge and mellow appearance. The down jacket generally has more than half of the amount of the duck down, and meanwhile, some fine feathers can be mixed, the duck down is cleaned and disinfected at high temperature, and then the down jacket is filled in clothes. The down jacket has the best warmth retention property. It is usually worn by people in cold regions and is also commonly used by polar researchers.
However, when the existing down jacket is manufactured in a sewing mode, down easily leaks out along sewn gaps, so that down penetration is caused, the heat preservation effect of the down jacket is easily influenced, in addition, when the down jacket is cleaned, the fabric is deformed due to the rubbing by using external force, and in addition, down fillers in the down jacket are easily accumulated at the bottom of the inner container in the airing process, so that the uneven distribution phenomenon is caused, so that the sewing down-proof down jacket and the manufacturing method thereof are provided, and the problems are solved.
Disclosure of Invention
The invention aims to solve the problems and provide a sewn down feather penetration prevention down jacket and a manufacturing method thereof.
The invention realizes the purpose through the following technical scheme:
a sewn down penetration-proof down jacket comprises a down filler, an inner container and two groups of fabrics, wherein the two groups of fabrics are respectively provided with a criss-cross sewing part, the two groups of fabrics form the inner container through the sewing parts, and the down filler is arranged in the inner container;
the sewing part sequentially comprises a primary sewing part, a secondary sewing part and a hot-pressing sealing part from inside to outside, wherein the secondary sewing part is in a fold line shape;
the fabric comprises an outer layer, a heat preservation layer and an inner layer in sequence from outside to inside, wherein the inner surface of the inner layer is uniformly distributed with a pasting layer, and the inner end of the pasting layer is provided with a modified expansion block which is used for increasing the heat preservation property by heating expansion and increasing the air permeability by contraction when meeting cold.
As a further optimized scheme of the invention, the outer layer is made of a terylene waterproof fabric.
As a further optimization scheme of the invention, the method comprises the following steps of: the heat-insulating layer comprises 20-30% of wool fibers and 70-80% of combed cotton.
As a further optimization scheme of the invention, the method comprises the following steps of: the inner layer comprises 20-30% of bamboo fibers, 30-60% of high-tenacity adhesive fibers and 20-40% of polyamide fibers.
As a further optimization scheme of the invention, the modified expansion block is of a spherical structure, and a layer is uniformly paved on the inner surface of the inner layer.
As a further optimization scheme of the invention, the method comprises the following steps of: the modified expansion block comprises 60-70% of pvdf; 5-10% of stabilizer and 20-35% of rubber.
As a further optimized scheme of the invention, the preparation method of the sewn down feather penetration preventing down jacket comprises the following steps:
s1: taking wool fibers as weft yarns and combed cotton without twist as warp yarns; sizing non-twist combed cotton, weaving the non-twist combed cotton in a high-tightness density manner by using an air jet or arrow shaft weaving machine, forming a heat insulation layer, uniformly arranging bamboo fibers, high-strength adhesive fibers and polyamide fibers in a staggered manner according to a proportion, bonding the bamboo fibers, the high-strength adhesive fibers and the polyamide fibers to form an inner layer, uniformly coating adhesive between the outer layer and the heat insulation layer, and between the heat insulation layer and the inner layer, and thermally bonding and pressing the inner layer to form an integral fabric;
s2: uniformly coating an adhesive layer on the inner side surface of the formed integral fabric, uniformly laying the modified expansion blocks on the adhesive layer, and pressurizing for 10 minutes at normal temperature by using a pressurizing machine to form a multilayer composite fabric;
quantitatively adding certain proportion of pvdf, a stabilizer and rubber, heating and mixing the mixture by using a mixing device to form a fluid mixture, wherein the heating temperature is 60-90 ℃, the stirring time is 50-60s, putting the fluid mixture into a granulator, and preparing a spherical modified expansion block by using the granulator and a self-contained cooling device;
s3: uniformly coating an adhesive layer on the inner side surface of the multilayer composite fabric, uniformly spraying the obtained spherical modified expansion blocks on the adhesive layer, and realizing multiple continuous hot pressing by using a hot press for 1-3min to form the fabric;
s4: taking 2 pieces of the fabrics, placing the fabrics on a sewing platform, sewing the fabrics in a straight line at one time to form a primary seam part, forming an inner container on the two groups of fabrics by the longitudinally and transversely staggered primary seam parts, filling the inner container with down filler by using a down filling machine, checking the uniformity of the down filler in the inner container,
and then carrying out secondary sewing on the outer side of the primary sewing part according to the fold line to form a secondary sewing part, finally forming two groups of hot-pressing sealing parts on the outer side of the secondary sewing part by utilizing a hot press for hot pressing, and finally cooling for 10-20min to form the sewn down penetration-proof down jacket.
As a further preferable aspect of the present invention, in S4, the distance between the primary seam part and the inner edges of the two sets of thermocompression bonded parts is 1-2.5cm, and the sewing density of the primary seam part is greater than that of the secondary seam part.
As a further optimization scheme of the invention, in S4, the hot-pressing temperature range of the hot-pressing machine is 120-160 ℃.
As a further optimization scheme of the invention, in S3, the coating and sticking layer is a hot melt adhesive film, and the hot pressing temperature range of the hot press is 60-80 ℃.
The invention has the beneficial effects that: should sew up anti-run down coat:
the spherical modified expansion block is formed on the surface of the inner layer, the modified expansion block is a thermal expansion cold shrinkage material, and rubber and a stabilizing agent are added, so that the elastic ductility is good, when a user wears the down jacket, the modified expansion block expands when the internal temperature rises, gaps among monomers of the modified expansion block can be reduced, the loss of heat can be greatly reduced, the heat preservation performance is good, when the modified expansion block shrinks, the gaps can be enlarged, the integral air permeability of the down jacket can be improved, the applicability is wide, and the wearing point is more comfortable and practical;
through sewing twice on the surface fabric, wherein, the outside of primary thread seam portion is equipped with secondary thread seam portion, utilize the secondary thread seam portion that is the dogleg shape, on the one hand, play the effect of consolidating primary thread seam portion, on the other hand, the sewing density of secondary thread seam portion is greater than the sewing density of primary thread seam portion, can effectually play in sewing up, prevent that the eiderdown filler from boring the fine hair, and secondary thread seam portion walks the line for the dogleg shape, for the line of walking of linear type, make the performance reinforcing is dragged to the tensile of two-layer surface fabric seam portion, avoid the down coat when wasing, the effect of taking place the split, and utilize hot press unit, the modified inflation piece of hot melt, make hot pressing position form hot pressing sealing portion, the effect of the surface fabric of sealed group that can be fine plays, anti-penetration fine nature improves by a wide margin.
Drawings
FIG. 1 is a schematic front sectional view of the present invention;
FIG. 2 is an enlarged schematic view of the invention at A in FIG. 1;
FIG. 3 is a schematic view of the present invention in partial side elevation and cross-sectional configuration;
FIG. 4 is a schematic front sectional view of a face fabric of the present invention;
FIG. 5 is a schematic view of a cross-sectional structure of a modified expansion block according to the present invention in a contracted state from the front.
In the figure: 1. a down filler; 2. an inner container; 3. fabric; 31. an outer layer; 32. a heat-insulating layer; 33. an inner layer; 34. a bonding layer; 35. modifying the expansion block; 4. a suture section; 41. a primary seam portion; 42. a secondary seam portion; 43. and (7) hot-pressing the sealing part.
Detailed Description
The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.
Example 1
As shown in fig. 1-3, a sewn down-proof down jacket comprises a down filler 1, an inner container 2 and two groups of fabrics 3, wherein the two groups of fabrics 3 are respectively provided with a criss-cross sewing part 4, the two groups of fabrics 3 form the inner container 2 through the sewing parts 4, and the down filler 1 is arranged in the inner container 2;
the sewing part 4 comprises a primary sewing part 41, a secondary sewing part 42 and a hot-pressing sealing part 43 from inside to outside in sequence, wherein the secondary sewing part 42 is in a zigzag shape;
as shown in fig. 2, the first seam portion 41 serves as a positioning and routing function, and meanwhile, the liner 2 is convenient to form quickly, and passes through the second seam portion 42, so as to reinforce the first seam portion 41, on the other hand, the sewing density of the second seam portion 42 is greater than that of the first seam portion 41, so that the feather filling material 1 penetrates into the feather during sewing, and the second seam portion 42 is a zigzag-shaped routing line, so that the anti-pulling performance of the sewing portions of the two layers of fabrics 3 is enhanced relative to the linear type routing line, and the occurrence of the split during cleaning of the down jacket is avoided, the arrangement of the hot-pressing sealing portion 43 can well serve as a function of sealing the two groups of fabrics 3, and the down resistance is greatly improved.
As shown in fig. 3-4, the fabric 3 sequentially comprises an outer layer 31, a heat insulation layer 32 and an inner layer 33 from outside to inside, wherein the inner surface of the inner layer 33 is uniformly distributed with an adhesive layer 34, and the inner end of the adhesive layer 34 is provided with a modified expansion block 35 for increasing heat insulation by thermal expansion and increasing air permeability by contraction when encountering cold.
The weight percentage of the material is as follows: modified expansion block 35 comprises 60-70% of pvdf; 5-10% of stabilizer and 20-35% of rubber; wherein, the pvdf (polyvinylidene fluoride) is a good thermal expansion and cold shrinkage material, the appearance is semitransparent or white powder or particles, the molecular chains are closely arranged, the material has strong hydrogen bonds, the oxygen index is 46 percent, the non-combustible crystallinity is 65 to 78 percent, and the density is 1.77 to 1.80g/cm 3 The melting point is 172 ℃, the thermal deformation temperature is 112-145 ℃, the long-term use temperature is 40-150 ℃, the performance is greatly improved under the multiple holding of a certain amount of stabilizing agent and rubber, wherein the stabilizing agent plays a role in stabilizing the thermal expansion and cold shrinkage properties of the pvdf, and meanwhile, the rubber improves the elasticity, so that the integral tensile property of the fabric 3 is good, and the fabric is light, soft and comfortable, and spherical particles with the diameter of 2mm are prepared by utilizing the following granulator.
The inner layer is processed to form the spherical modified expansion block, the modified expansion block is made of thermal expansion cold shrinkage materials, rubber and a stabilizing agent are added, the elastic ductility is good, when a user wears the down jacket, the internal temperature rises, as shown in figure 4, the modified expansion block expands, so that gaps among the modified expansion block monomers can be reduced, the loss of heat can be greatly reduced, the heat preservation performance is good, as the modified expansion block contracts, as shown in figure 5, the gaps among the modified expansion block monomers can be enlarged, the integral air permeability of the down jacket can be improved, the applicability is wide, and the wearing point is more comfortable and practical;
the preparation method of the sewed down feather penetration preventing down jacket comprises the following steps:
s1: using 30% of wool fiber as weft and 70% of combed cotton without twist as warp, wherein; sizing untwisted combed cotton, weaving the untwisted combed cotton in a high-tightness density mode by using an air jet or arrow shaft weaving machine, forming a heat insulation layer 32, uniformly arranging and bonding 20% of bamboo fibers, 55% of high-strength adhesive fibers and 25% of polyamide fibers in a staggered mode according to a proportion to form an inner layer 33, wherein the outer layer 31 is made of a polyester waterproof fabric, coating adhesive glue is uniformly coated between the outer layer 31 and the heat insulation layer 32 and between the heat insulation layer 32 and the inner layer 33, and the whole fabric is formed after hot bonding and pressing;
s2: uniformly coating an adhesive layer 34 on the inner side surface of the formed integral fabric, uniformly paving a modified expansion block 35 on the adhesive layer 34, and pressurizing for 10 minutes at normal temperature by using a pressurizing machine to form a multi-layer composite fabric;
quantitatively adding 60% of pvdf, 5% of a stabilizer and 35% of rubber, heating and mixing the mixture by using a mixing device to form a fluid mixture, wherein the heating temperature is 80 ℃, the stirring time is 60s, the fluid mixture is put into a granulator, and the granulator and a self-contained cooling device are used for preparing a spherical modified expansion block 35;
s3: uniformly coating an adhesive layer 34 on the inner side surface of the multilayer composite fabric, uniformly spraying the obtained spherical modified expansion blocks 35 on the adhesive layer 34, and realizing multiple continuous hot pressing by using a hot press for 3min to form a fabric 3;
the application layer 34 is a hot-melt adhesive film, the hot-pressing temperature of the hot press is 60 ℃, the modified expansion block 35 is not enough to deform at 112 ℃ through testing, and meanwhile, the hot-melt adhesive film melts and is used for adhering the modified expansion block 35 to the inner side surface of the multilayer composite fabric, and the final solid shape is achieved after cooling;
s4: taking 2 pieces of the fabric 3, placing the fabric on a sewing platform, sewing the fabric according to straight lines at one time to form primary seam parts 41, forming the inner containers 2 on the two groups of the fabric 3 by the criss-cross primary seam parts 41, filling the down feather filler 1 in the inner containers 2 by using a down feather filling machine, checking the uniformity of the down feather filler 1 in the inner containers 2,
the distances between the primary seam part 41 and the inner edges of the two groups of hot-press sealing parts 43 are equal and are 2.5cm, the sewing density of the primary seam part 41 is greater than that of the secondary seam part 42, the down penetration resistance is good, and the tearing resistance is good;
and then carrying out secondary sewing on the outer side of the primary sewing part 41 according to the fold line to form a secondary sewing part 42, finally forming two groups of hot-pressing sealing parts 43 on the outer side of the secondary sewing part 42 by utilizing a hot press in a hot pressing manner, and finally cooling for 10-20min to form the sewn down penetration preventing down jacket.
It should be noted that, a pressure device and a heating strip are arranged on the hot press, the heating strip is pushed onto the fabric 3 under the pushing action of the pressure device, the temperature of the heating strip of the hot press is 160 ℃, the melting point of the modified expansion block 35 is exceeded, the modified expansion block at the position of the heating strip is melted at the moment, and a hot-pressing sealing part 43 is formed outside the secondary seam part 42, so that the fabric is bonded without adding glue additionally, the effect of sealing and preventing down penetration is achieved, only the sealing effect can be achieved by changing the temperature of the hot press, and similarly, when the outer part of the down jacket is broken, the hot-pressing sealing remedial measure can be carried out by using the method, so that the hot-pressing sealing remedial measure is diversified and has strong applicability.
Example 2
The steps of the preparation method of the sewn down-proof down jacket in the embodiment are the same as those of the embodiment 1 except that 65 percent of pvdf, 7 percent of stabilizing agent and 23 percent of rubber are quantitatively added in S2.
Example 3
The steps of the preparation method of the sewn down-proof down jacket in the embodiment are the same as those of the embodiment 1 except that 70 percent of pvdf, 10 percent of stabilizing agent and 20 percent of rubber are quantitatively added in the step of S2.
Comparative example 1
The preparation method of the sewed down feather penetration preventing down jacket comprises the following steps:
s1: using 30% of wool fiber as weft and 70% of combed cotton without twist as warp, wherein; sizing untwisted combed cotton, weaving the untwisted combed cotton in a high-tightness density mode by using an air jet or arrow shaft weaving machine, forming a heat insulation layer 32, uniformly arranging and bonding 20% of bamboo fibers, 55% of high-strength adhesive fibers and 25% of polyamide fibers in a staggered mode according to a proportion to form an inner layer 33, wherein the outer layer 31 is made of a polyester waterproof fabric, coating adhesive glue is uniformly coated between the outer layer 31 and the heat insulation layer 32 and between the heat insulation layer 32 and the inner layer 33, and the whole fabric is formed after hot bonding and pressing;
s2: uniformly coating an adhesive layer 34 on the inner side surface of the formed integral fabric, uniformly paving a modified expansion block 35 on the adhesive layer 34, and pressurizing for 10 minutes at normal temperature by using a pressurizing machine to form a multi-layer composite fabric;
quantitatively adding 100% of pvdf, heating and mixing by using a mixing device to form a fluid mixture, heating at 80 ℃ for 60s, putting the fluid mixture into a granulator, and preparing spherical expansion blocks by using the granulator and a self-contained cooling device;
s3: uniformly coating an adhesive layer 34 on the inner side surface of the multilayer composite fabric, uniformly spraying the obtained spherical expansion blocks on the adhesive layer 34, and realizing multiple continuous hot pressing by using a hot press for 3min to form a fabric 3;
the application layer 34 is a hot-melt adhesive film, the hot-pressing temperature of the hot press is 60 ℃, the modified expansion block 35 is not enough to deform at 112 ℃ through testing, and meanwhile, the hot-melt adhesive film melts and is used for adhering the modified expansion block 35 to the inner side surface of the multilayer composite fabric, and the final solid shape is achieved after cooling;
s4: taking 2 pieces of the fabrics 3, placing the fabrics on a sewing platform, sewing the fabrics in a straight line at one time to form a primary seam part 41, forming an inner container 2 on the two groups of fabrics 3 by the criss-cross primary seam parts 41, filling the down filler 1 in the inner container 2 by using a down filling machine, checking the uniformity of the down filler 1 in the inner container 2,
wherein, the distances between the inner edges of the primary seam part 41 and the two groups of hot-press sealing parts 43 are equal and are both 2.5cm, and the sewing density of the primary seam part 41 is greater than that of the secondary seam part 42;
and then carrying out secondary sewing on the outer side of the primary sewing part 41 according to the fold line to form a secondary sewing part 42, finally forming two groups of hot-pressing sealing parts 43 on the outer side of the secondary sewing part 42 by utilizing a hot press in a hot pressing manner, and finally cooling for 10-20min to form the sewn down penetration preventing down jacket.
It should be noted that, a pressure device and a heating strip are arranged on the hot press, the heating strip is pushed onto the fabric 3 under the pushing action of the pressure device, the temperature of the heating strip of the hot press is 160 ℃, the melting point of the modified expansion block 35 is exceeded, the modified expansion block at the position of the heating strip is melted at the moment, and a hot-pressing sealing part 43 is formed outside the secondary seam part 42, so that the fabric is bonded without adding glue additionally, the effect of sealing and preventing down penetration is achieved, only the sealing effect can be achieved by changing the temperature of the hot press, and similarly, when the outer part of the down jacket is broken, the hot-pressing sealing remedial measure can be carried out by using the method, so that the hot-pressing sealing remedial measure is diversified and has strong applicability.
Comparative example 2
In the sewn down-proof down jacket in the comparative example, except for the step S4, the steps of the preparation method are the same as those of example 1 except that the two groups of the heat-pressing sealing parts 43 are not formed on the outer sides of the secondary seam parts 42 by the heat pressing of the heat pressing machine.
Comparative example 3
In the step of the manufacturing method of the sewn down-proof down jacket of the comparative example, except for the step of S4, the sewing density of the primary seam portion 41 is lower than that of the secondary seam portion 42, the other steps are the same as those of example 1.
To verify the effect of the sewn down-proof down jacket prepared in the present invention, the following tests were used to test the performance thereof
Testing penetration resistance:
regarding the plus materials with inner liners obtained in the embodiments 1 to 3 and the comparative examples 1 to 3, a first experiment box, a second experiment box, a blower and a sticky board are taken as experiment instruments, wherein the output end of the blower is communicated with the first experiment box, white duck feather is taken as test velvet, the plus materials with inner liners of the embodiments and the comparative examples are taken, one side with a sewing surface is sleeved on the opening position of the first experiment box, the sticky board is arranged in the second experiment box, the opening of the second experiment box is reversely buckled at the opening position of the first experiment box, wherein the top of the second experiment box is provided with an air outlet, the blower sequentially penetrates through the plus materials and the sticky board with internal air flow, under the condition that the wind power of the blower, the number of the test velvet and the experiment time are fixed, the good and bad anti-burdening performance of the plus materials of the embodiments and the comparative examples can be known by observing the number of the test velvet on the sticky board, the results of the measurements are given in the following table:
the above table shows that:
in the embodiments 1 to 3 of the present invention, the fabric is sewn twice, wherein the secondary seam portion 42 is disposed outside the primary seam portion 41, and the secondary seam portion 42 in a zigzag shape is utilized to reinforce the primary seam portion 41, on the one hand, the sewing density of the secondary seam portion 42 is greater than the sewing density of the primary seam portion 41, so that the penetration of the down feather filler 1 during sewing can be effectively performed, and the secondary seam portion 42 is a zigzag-shaped routing, so that compared with a linear routing, the tensile resistance of the seam portion of the two layers of fabric 3 is enhanced, the phenomenon that the down feather jacket is broken when being cleaned is avoided, and the hot-pressing device is utilized to hot-melt the modified expansion block 35, so that the hot-pressing portion forms the hot-pressing sealing portion 43, the effect of sealing the two groups of fabric 3 can be well performed, and the penetration resistance is greatly improved.
In comparative example 1, the stabilizer and the rubber are removed, only the pvdf is used as the expansion block, and the physical property of the pvdf is unstable, so that the softness of the pvdf cannot meet the requirement when the pvdf is applied to the fabric, the thermal expansion and cold shrinkage performance of the pvdf is greatly reduced, the elastic expansion and contraction deformation of the pvdf are not obvious, and gaps between the expansion blocks exist, so that the number of the adsorption test piles on the adhesion plate is far larger than that of the adsorption test piles on the adhesion plate in examples 1-3, and the fabric prepared by the preparation method in comparative example 1 has poor down penetration resistance.
In comparative example 2, the thermocompression seal 43 was not formed, only the sewing machine was used to perform the primary sewing and the secondary sewing, and although the reinforcement was performed by the secondary sewing, a gap was still generated in the sewing, and thus the down penetration phenomenon was occurred by the blower, and therefore, the number of adsorption test piles on the adhesive sheet was much greater than that of the adsorption test piles on the adhesive sheet in examples 1 to 3, and the down penetration resistance of the fabric prepared by the preparation method in comparative example 2 was poor.
In comparative example 3, the sewing density of the primary seam part 41 was greater than that of the secondary seam part 42, but the thermocompression seal part 43 was still provided outside the secondary seam part 42, and thus the test lint was adsorbed on the adhesive sheet thereof, which was not much different from the amount of adsorption of the test lint on the adhesive sheet in examples 1 to 3, but was higher than that of the examples 1 to 3, and thus the lint penetration resistance of the fabric manufactured by the manufacturing method in comparative example 3 was poor.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. The utility model provides a make up down coat of preventing boring down which characterized in that: the down filling material comprises a down filling material (1), an inner container (2) and two groups of fabrics (3), wherein the two groups of fabrics (3) are respectively provided with a criss-cross sewing part (4), the two groups of fabrics (3) form the inner container (2) through the sewing parts (4), and the down filling material (1) is arranged in the inner container (2);
the sewing part (4) sequentially comprises a primary sewing part (41), a secondary sewing part (42) and a hot-pressing sealing part (43) from inside to outside, wherein the secondary sewing part (42) is in a zigzag shape;
the fabric (3) sequentially comprises an outer layer (31), a heat preservation layer (32) and an inner layer (33) from outside to inside, wherein a pasting layer (34) is uniformly distributed on the inner surface of the inner layer (33), and a modified expansion block (35) which is used for increasing heat preservation property through heating expansion and increasing air permeability through cooling contraction is arranged at the inner end of the pasting layer (34).
2. The stitched down penetration resistant down jacket of claim 1, wherein: the outer layer (31) is made of a polyester waterproof fabric.
3. The stitched down penetration resistant down jacket of claim 1, wherein: the weight percentage of the material is as follows: the heat insulation layer (32) comprises 20-30% of wool fibers and 70-80% of combed cotton.
4. The stitched down penetration resistant down jacket of claim 1, wherein: the weight percentage of the material is as follows: the inner layer (33) comprises 20-30% of bamboo fibers, 30-60% of high-tenacity adhesive fibers and 20-40% of polyamide fibers.
5. The stitched down penetration resistant down jacket of claim 1, wherein: the modified expansion block (35) is of a spherical structure, and a layer is uniformly paved on the inner surface of the inner layer (33).
6. The stitched down penetration resistant down jacket of claim 1, wherein: the weight percentage is as follows: the modified expansion mass (35) comprises 60-70% of pvdf; 5-10% of stabilizer and 20-35% of rubber.
7. A method of making a stitched down-proof down jacket according to any one of claims 1 to 6, wherein: the manufacturing method comprises the following steps:
s1: taking wool fibers as weft yarns and combed cotton without twist as warp yarns; sizing non-twist combed cotton, weaving at high tightness and density to form a heat-insulating layer (32), uniformly arranging bamboo fibers, high-strength adhesive fibers and polyamide fibers in a staggered mode according to a proportion, bonding to form an inner layer (33), uniformly coating adhesive between the outer layer (31) and the heat-insulating layer (32) and between the heat-insulating layer (32) and the inner layer (33), and thermally bonding and pressing to form an integral fabric;
s2: uniformly coating an adhesive layer (34) on the inner side surface of the formed integral fabric, uniformly paving the modified expansion blocks (35) on the adhesive layer (34), and pressurizing for 10 minutes at normal temperature to form a multi-layer composite fabric;
quantitatively adding certain proportion of pvdf, a stabilizer and rubber, heating and mixing to form a fluid mixture, wherein the heating temperature is 60-90 ℃, the stirring time is 50-60s, cooling the fluid mixture, and preparing into a spherical modified expansion block (35);
s3: uniformly coating an adhesive layer (34) on the inner side surface of the multilayer composite fabric, uniformly spraying the obtained spherical modified expansion blocks (35) on the adhesive layer (34), and continuously hot-pressing for 1-3min for multiple times to form the fabric (3);
s4: taking 2 pieces of the fabrics (3), sewing the fabrics at one time according to straight lines to form primary seam parts (41), forming the inner containers (2) on the two groups of fabrics (3) by the criss-cross primary seam parts (41), filling the down feather fillers (1) in the inner containers (2), and then checking the uniformity of the down feather fillers (1) in the inner containers (2),
and then carrying out secondary sewing on the outer side of the primary sewing part (41) according to the fold line to form a secondary sewing part (42), finally carrying out hot pressing on the outer side of the secondary sewing part (42) to form two groups of hot-pressing sealing parts (43), and finally cooling for 10-20min to form the sewn down-proof down jacket.
8. The method for making a sewn down-proof down jacket as claimed in claim 7, wherein the method comprises the steps of: in S4, the distance between the primary seam part (41) and the inner edge of the two groups of heat-press sealing parts (43) is 1-2.5cm, and the sewing density of the primary seam part (41) is greater than that of the secondary seam part (42).
9. The method for making a sewn down-proof down jacket as claimed in claim 7, wherein the method comprises the steps of: in S4, the hot pressing temperature range is 120-160 ℃.
10. The method for making a sewn down-proof down jacket as claimed in claim 7, wherein the method comprises the steps of: in S3, the coating and sticking layer (34) is a hot melt adhesive film, and the hot pressing temperature range is 60-80 ℃.
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