Fiber filler and fiber-filled flocculus thereof

Abstract

The invention discloses a fiber filler and a fiber-filled flocculus thereof, the fiber filler comprises a plurality of first fiber balls, each first fiber ball comprises a plurality of first hollow polyester fibers and a plurality of second hollow polyester fibers, the first hollow polyester fibers have a first crimp number, and the second hollow polyester fibers have a second crimp number. The second hollow polyester fiber has a second curl number different from the first curl number, wherein the difference between the first curl number and the second curl number is greater than 1. The invention also discloses a fiber-filled flocculus using the fiber filler. Through the fiber filler with rebound resilience and bulkiness, the fiber filling flocculus composed of the fiber filler and the non-woven fabric fiber net has excellent rebound resilience and bulkiness, and can maintain excellent water washing resistance and warm keeping degree maintenance after water washing.

Description

Technical Field

[0001] The invention relates to a fiber filling material and a fiber filling flake thereof. Background Art

[0002] With regard to the existing technologies for fiber fillings, the main demands are mostly light weight and good warmth retention. In addition, in consideration of animal protection and the recycling of filling materials, recyclable artificial chemical fibers are mostly used as thermal filling materials. When developing chemical fiber filling materials, it is hoped that the properties of down or feathers can be imitated, such as light texture, warmth retention, and the ability to be fluffy after squeezing, and even maintaining warmth after washing.

[0003] Generally speaking, in order to make the fiber ball have the characteristics of light texture, hollow fibers are selected as the down-like material. For example, China Publication No. CN107208321B discloses a hollow fiber sphere, which uses only a single type of hollow fiber to make the fiber ball. Since it is composed of only a single type of hollow fiber, the obtained fiber ball is relatively dense, but has poor fluffiness and resilience. When further applied to fabric materials, it will affect the re-fluffing property of the fabric material and even affect the warmth retention after washing.

[0004] In order to improve the resilience of the fabric, for example, Chinese Publication No. CN108166159B uses elastic hollow fibers to improve the resilience of the fabric. However, the hollow fibers used in Chinese Publication No. CN108166159B are relatively expensive and do not meet the needs of commercial mass production.

[0005] Based on this, this case proposes a method that only requires the use of general hollow polyester fibers to simultaneously improve resilience and fluffiness, thereby enhancing the refluffability of the fabric, and the fabric can also have a higher warmth retention rate (Clothing Insulation, CLO) after washing. Summary of the invention

[0006] One embodiment of the present invention provides a fiber filler. The fiber filler includes a plurality of first fiber balls, and the first fiber balls include a plurality of first hollow polyester fibers and a plurality of second hollow polyester fibers. The first hollow polyester fibers have a first crimp number, and the second hollow polyester fibers have a second crimp number different from the first crimp number. In addition, the difference between the first crimp number and the second crimp number is greater than 1.

[0007] In some embodiments, the difference between the first crimp number and the second crimp number is 2 to 12.

[0008] In some embodiments, the difference between the first crimp number and the second crimp number is 4 to 10.

[0009] In some embodiments, the first elastic elongation of the first hollow polyester fiber is no greater than 50%, and the second elastic elongation of the second hollow polyester fiber is no greater than 50%.

[0010] In some embodiments, the first hollow polyester fiber has a denier of 0.5 to 40 deniers, and the second hollow polyester fiber has a denier of 0.5 to 40 deniers.

[0011] In some embodiments, the average maximum outer diameter of the first fiber balls is distributed in a range of 0.5 mm to 15 mm.

[0012] In some embodiments, the first fiber balls have a resilience of not less than 74%.

[0013] In some embodiments, the bulkiness of the first fiber ball is not less than 8000 cm 3 / 50g.

[0014] In some embodiments, the materials of the first hollow polyester fiber and the second hollow polyester fiber include petroleum-derived polyester fiber, biomass-derived polyester fiber, recycled polyester fiber, biodegradable polyester fiber, or a combination thereof.

[0015] In some embodiments, the fiber filler further comprises a second fiber ball, wherein the second fiber ball comprises a plurality of third hollow polyester fibers and a plurality of fourth hollow polyester fibers, wherein the third hollow polyester fibers have a third crimp number, and the fourth hollow polyester fibers have a fourth crimp number different from the third crimp number.

[0016] One embodiment of the present invention provides a fiber-filled flake. The fiber-filled flake is composed of at least one non-woven fiber web and a plurality of fiber balls. The plurality of fiber balls are fixed to the non-woven fiber web. Furthermore, the fiber balls include a plurality of first hollow polyester fibers and a plurality of second hollow polyester fibers. The first hollow polyester fibers have a first crimp number, and the second hollow polyester fibers have a second crimp number different from the first crimp number, and the difference between the first crimp number and the second crimp number is greater than 1.

[0017] In some embodiments, the melting point of the first hollow polyester fiber is not less than 220°C, and the melting point of the second hollow polyester fiber is not less than 220°C.

[0018] In some embodiments, the first hollow polyester fiber of the fiber-filled batt has a denier of 0.5 denier to 40 denier, and the second hollow polyester fiber has a denier of 0.5 denier to 40 denier.

[0019] In some embodiments, the fiberfill batt has a characteristic thermal insulation maintenance rate of not less than 95%.

[0020] In some embodiments, the fiberfill batting has a basis weight of 40 g / m 2Up to 1100g / m 2 .

[0021] In some embodiments, the basis weight of the fiber balls is 30 g / m 2 Up to 900g / m 2 , and the basis weight of the nonwoven web is 10g / m 2 Up to 200g / m 2 .

[0022] In some embodiments, the fiberfill batting has a resiliency of not less than 80%.

[0023] In some embodiments, the fiberballs comprise 5% to 95% by weight of the fiberfill batting.

[0024] In some embodiments, the fiber balls are physically attached to the nonwoven web by needling.

[0025] In some embodiments, the fiberfill batting is suitable for being further prepared into bedding, duvets, coats, down jackets, vests, tops, pants, hats, gloves, snow boots, and neck gaiters.

[0026] The present invention provides a fiber filling material with resilience and bulkiness, and the fiber balls of the fiber filling material can form a fiber filling flake with a non-woven fiber web. In addition to having excellent resilience and bulkiness, the fiber filling flake can also maintain excellent water washing resistance and warmth retention after washing. In addition, after washing, the fiber filling flake will not agglomerate, so that the bedding and clothing made of the fiber filling flake have the advantages of excellent warmth retention, bulkiness and water washing resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] To make the purpose, features, advantages and embodiments of the present invention more clearly understood, the detailed description of the accompanying drawings is as follows:

[0028] Figure 1 is a schematic diagram of manufacturing a fiber ball according to an embodiment of the present invention;

[0029] Figure 2 is a cross-sectional schematic diagram of a hollow polyester fiber according to an embodiment of the present invention;

[0030] Figure 3 is a schematic diagram of a fiber ball according to another embodiment of the present invention; and

[0031] Figures 4 to 6 They are cross-sectional schematic diagrams of different embodiments of the fiber-filled batt of the present invention.

[0032] Wherein, the reference numerals are:

[0033] 102A, 102B: Hollow polyester fiber

[0034] 106A, 106B, 106: Fiber ball

[0035] 108: Fiber filler

[0036] 200A, 200B, 200C: Fiber-filled flakes

[0037] 210A, 210B, 210C: Non-woven fabric

[0038] S11~S13: Steps

[0039] D1: inner diameter

[0040] D2: outer diameter DETAILED DESCRIPTION

[0041] The spirit of the present invention will be clearly illustrated below with the accompanying drawings and detailed descriptions. Anyone with common knowledge in the technical field can make changes and modifications based on the techniques taught by the present invention after understanding the preferred embodiments of the present invention, without departing from the spirit and scope of the present invention.

[0042] In addition, relative terms, such as "lower" or "bottom" and "upper" or "top", are used to describe the relationship of one element to another element shown in the drawings herein. It is understood that relative terms are used to describe different orientations of the device other than those described in the drawings. For example, if the device in a drawing is turned over, the element that would be described as being on the "lower" side of the other elements will be oriented to be on the "upper" side of the other elements. The exemplary term "lower" can include both the "lower" and "upper" orientations depending on the particular orientation of the drawing. Similarly, if the device in a drawing is turned over, the element that would be described as being "below" or "beneath" the other elements will be oriented to be "above" the other elements. The exemplary term "lower" or "beneath" can include both the "above" and "above" orientations.

[0043] The words "include", "including", "have", "contain" and the like used in this document are open-ended terms, meaning including but not limited to.

[0044] The embodiment of the present invention provides a fiber filler. The fiber filler comprises a plurality of fiber balls, and the fiber balls comprise at least two types of hollow polyester fibers. For a more detailed description of the embodiment of the present invention, please refer to Figure 1 , Figure 1 It is a schematic diagram of manufacturing a fiber ball according to an embodiment of the present invention.

[0045] First, if Figure 1As shown in step S11, at least two hollow polyester fibers 102A and 102B with different crimp numbers (CN) are selected. Further, the crimp number (CN) refers to the number of bends per unit length of the hollow polyester fibers 102A and 102B. The crimp number refers to the number of crimps per 25 millimeters (mm) of the hollow polyester fibers 102A and 102B, and therefore, the unit of the crimp number is no. / 25mm.

[0046] In some embodiments, the curling numbers of the hollow polyester fibers 102A and 102B are in the range of 8.0 to 25.0, preferably 11.0 to 21.0. In addition, when the curling numbers of the hollow polyester fibers 102A and 102B are less than 8, the fiber balls 106A made from the hollow polyester fibers 102A and 102B will have insufficient structural stiffness, resulting in poor resilience, and further causing the fiber-filled flakes (such as the fiber-filled flakes 200A, 200B, and 200C of the embodiments described below) to have a low Clothing Insulation (CLO) maintenance rate after washing, wherein the CLO maintenance rate will be described in the following content.

[0047] The difference between the crimp number of the hollow polyester fiber 102A and the crimp number of the hollow polyester fiber 102B is (|CN1-CN2|=ΔCN). In some embodiments, the difference (ΔCN) between the crimp number of the hollow polyester fiber 102A and the crimp number of the hollow polyester fiber 102B is greater than 1. In some embodiments, preferably, the difference (ΔCN) between the crimp number of the hollow polyester fiber 102A and the crimp number of the hollow polyester fiber 102B is 2 to 12, and more preferably, the difference (ΔCN) between the crimp number of the hollow polyester fiber 102A and the crimp number of the hollow polyester fiber 102B is 4 to 10.

[0048] To further explain the degree of crimp (CD) of the hollow polyester fibers 102A and 102B, the crimped hollow polyester fibers 102A and 102B are formed by a corrugating machine, and the crimped hollow polyester fibers 102A and 102B have different crimp numbers (CN) and degrees of crimp (CD). The degree of crimp refers to the percentage of the length before processing minus the length after processing of the hollow polyester fibers 102A and 102B divided by the length after processing, that is, (length before processing - length after processing) / length after processing * 100%. In some embodiments, the crimp (%) of the hollow polyester fibers 102A and 102B ranges from 10.0% to 30%, preferably from 13.0% to 22.0%. In addition, when the curl degree of the hollow polyester fibers 102A and 102B is lower than 10%, the elastic deformation of the hollow polyester fibers 102A and 102B is low, which will make the fiber balls 106A made of the hollow polyester fibers 102A and 102B have low resilience.

[0049] In addition, it is worth mentioning that the first elastic elongation of the hollow polyester fiber 102A is not higher than 50%, and the second elastic elongation of the hollow polyester fiber 102B is not higher than 50%, that is, the hollow polyester fibers 102A and 102B are non-elastic hollow polyester fibers. In addition, the hollow polyester fibers 102A and 102B are not elastic fibers. Moreover, the hollow polyester fibers 102A and 102B are non-low melting point thermal adhesive fibers. For example, the melting point of the hollow polyester fiber 102A is 220°C to 270°C, and preferably 230°C to 260°C, more specifically, not less than 220°C. The melting point of the hollow polyester fiber 102B is 220°C to 270°C, and preferably 230°C to 260°C. Preferably, the melting point of the hollow polyester fiber 102A is not less than 220°C, more specifically, not less than 220°C. It is worth mentioning that the fiber filler 108 of the present invention is obtained by fixing the fiber balls 106A, 106B made of hollow polyester fibers 102A, 102B to each other through a physical reinforcement process (such as physical needling), and the hollow polyester fibers 102A, 102B with a melting point of not less than 220°C are used to avoid the fiber filler 108 from becoming rough or hardened due to heating during the production process of the fiber filler 108, thereby affecting the touch of the fiber filler 108.

[0050] For further description of the technical characteristics of the hollowness of the hollow polyester fibers 102A and 102B, please refer to Figure 2 , Figure 2 is a schematic cross-sectional view of a hollow polyester fiber according to an embodiment of the present invention, wherein Figure 2The concentric hollow polyester fiber 102A is taken as an example, but the present invention is not limited thereto. The hollowness refers to (hollow circle area / maximum outer diameter circle area)*100% of the hollow polyester fibers 102A and 102B. Figure 2 For example, hollowness = (inner diameter D1 2 / Outer diameter D2 2 )*100%.

[0051] In addition, although Figure 2 The hollow polyester fibers 102A and 102B shown have a circular cross section. The hollow polyester fibers 102A and 102B may also have an elliptical cross section or a special-shaped cross section, but the present invention is not limited thereto.

[0052] Since the hollow polyester fibers 102A and 102B can use the holes in the fibers to increase the air content to prevent heat loss, thereby improving the thermal insulation effect. Therefore, the thermal insulation effect of the fabric is related to the hollowness of the hollow polyester fibers 102A and 102B. In some embodiments, the hollowness of the hollow polyester fibers 102A and 102B is 8% to 22%.

[0053] In some embodiments, the Denier (Denier, D) of the hollow polyester fibers 102A and 102B ranges from 0.5 to 40.0 deniers, respectively. It is also noted that when the Denier of the hollow polyester fibers 102A and 102B is lower than 0.5 denier, although the fiber filler 108 has an excellent feel, the fiber filler 108 is not stiff enough, resulting in insufficient support of the fiber filler 108. When the Denier of the hollow polyester fibers 102A and 102B is higher than 40 deniers, the fiber filler 108 feels too rough, and the fiber filler 108 used for warmth retention has the disadvantage of not being dense enough, which is not conducive to heat retention. In some embodiments, preferably, the Denier (D) of the hollow polyester fibers 102A and 102B is 0.8 to 15.0 deniers; more preferably, the hollow polyester fibers 102A and 102B are 1.5 to 7.0 deniers. In some embodiments, the difference in the denier numbers of at least two hollow polyester fibers 102A and 102B is between 0 and 5.5.

[0054] In some embodiments, the hollow polyester fibers 102A and 102B are made of synthetic fibers. The present invention further selects polyester fibers such as polyester fibers derived from petroleum, polyester fibers containing recycled materials, biodegradable polyester fibers (such as polylactic acid (PLA), polyester fibers derived from biomass (such as BIO-PET), or combinations thereof. The recycled polyester fibers include, for example, polyester fibers made from recycled PET bottle flakes and recycled fabric fibers. The petroleum-derived polyester fibers include, for example, polyethylene terephthalate (PET), polypropylene terephthalate (PTT), or polybutylene terephthalate (PBT). Preferably, the hollow polyester fibers 102A and 102B are made of polyethylene terephthalate.

[0055] Then as Figure 1 In step S12, at least two types of hollow polyester fibers 102A and 102B are mixed and rolled into balls to form fiber balls 106A. In addition, it is worth mentioning that for the convenience of explanation, the hollow polyester fibers 102A and 102B in steps S11 and S12 are represented as one, but during the production, there are multiple hollow polyester fibers 102A and 102B. For example, in step S13, multiple fiber balls 106A formed by the hollow polyester fibers 102A and 102B form the fiber filler 108.

[0056] In addition, in some embodiments, the length of the hollow polyester fibers 102A and 102B is 6 to 90 mm, more preferably 20 to 70 mm, and more preferably 30 to 60 mm. In some embodiments, the average maximum outer diameter distribution of the fiber balls 106A obtained by at least two hollow polyester fibers 102A and 102B is 0.5 mm to 15 mm, preferably 1 mm to 13 mm. In addition, since a large number of fiber balls 106A are obtained, in some embodiments of the present invention, the size of the fiber balls 106A is defined by the "average" maximum outer diameter. In some embodiments, the fiber balls 106A are spherical, and the size of the fiber balls 106A is calculated based on the outer diameter of the sphere. In some embodiments, the fiber balls 106A are non-spherical, and the size of the fiber balls 106A is calculated based on the maximum outer diameter of the fiber balls 106A.

[0057] In some embodiments, the resilience of the fiber ball 106A obtained by using at least two hollow polyester fibers 102A and 102B is not less than 74%, preferably, not less than 75% to 85%, and more preferably, not less than 77% to 81%. In addition, when the resilience of the fiber ball 106A is lower than 74%, the resilience of the fiber ball 106A is low, so that the resilience of the fiber-filled flakes (such as the fiber-filled flakes 200A, 200B, 200C) prepared later is also poor, which is not conducive to the application in bedding and clothing.

[0058] In some embodiments, the bulkiness of the fiber balls 106A obtained by using at least two hollow polyester fibers 102A and 102B is not less than 8000 cm 3 / 50g, preferably 9000cm 3 / 50g to 12000cm 3 / 50g, so as to provide good thermal insulation performance, that is, good warmth retention. In addition, when the bulkiness of the fiber ball 106A is less than 8000cm 3 When the fiber balls 106A are 50 g / cm, the gaps between the fiber balls 106A will be smaller, which will reduce the warmth retention of the fiber balls 106A and the fiber-filled flakes 200A, 200B, and 200C prepared later. The bulkiness is a unit for measuring the thickness or bulkiness of a textile, and the unit of bulkiness is cm. 3 / 50g, the method for testing the bulkiness is described in detail later.

[0059] It is worth mentioning that the embodiments of the present invention provide a fiber filler 108 having both good resilience and good bulkiness to improve the re-fluffing property of fabrics (e.g., fiber-filled flakes 200A, 200B, 200C), wherein the re-fluffing property must simultaneously consider the bulkiness and resilience of the fiber filler 108, that is, the re-fluffing property of fabrics made of fiber fillers 108 with better bulkiness and better resilience is also better. This will be described in detail in various embodiments described later.

[0060] Next, see Figure 3 , Figure 3 1 is a schematic diagram of a fiber filler according to another embodiment of the present invention. In some embodiments, the fiber filler 108 further comprises a plurality of another fiber balls 106B, and the another fiber balls 106B comprise a plurality of at least two hollow polyester fibers, such as Figure 3 As shown, at least two hollow polyester fibers have different curl numbers, and the resilience of fiber ball 106B is different from the resilience of fiber ball 106A. For the convenience of description, in the following embodiments, fiber ball 106 includes fiber ball 106A, fiber ball 106B or a combination thereof.

[0061] Furthermore, the fiber filler 108 made of the fiber balls 106 can be further made into fiber filling flakes 200A, 200B, and 200C. However, since the fiber balls 106 are prone to displacement, low-melting point thermal adhesive fibers are usually added in the prior art to fix the fiber balls to each other. For example, China Publication No. CN107407027B and Japan Publication No. JP2018119240A both use low-melting point thermal adhesive fibers, and fix the fiber balls to form a fiber structure through a heating process. However, the texture of the fiber structure material fixed by heating becomes hard, resulting in poor resilience and fluffiness of the material itself, which in turn affects the refluffing property.

[0062] Therefore, another object of the present invention is to provide a fiber-filled flake, in which there is no need to add low-melting-point thermal adhesive fibers between the fiber balls (such as fiber balls 106) in the fiber-filled flake, so that the fiber-filled flake can have good resilience and fluffiness at the same time, thereby improving the re-fluffiness of the fabric and maintaining a high warmth retention rate (CLO) after washing.

[0063] Next, see Figure 4 , Figure 4 It is a cross-sectional schematic diagram of an embodiment of the fiber-filled flake of the present invention. The fiber-filled flake 200A is composed of a non-woven fiber web 210A and a plurality of fiber balls 106. In some embodiments, the fiber balls 106 include at least two hollow polyester fibers 102A and 102B mentioned above. The fiber balls 106 and the fiber fillers 108 made of at least two hollow polyester fibers 102A and 102B can not only improve the resilience of the fiber-filled flake 200A, but also maintain excellent water resistance and warmth after washing. It is worth mentioning that, as mentioned above, the fiber balls 106 refer to the fiber balls 106A, the fiber balls 106B or a combination thereof. In addition, the process and technical features of the at least two hollow polyester fibers 102A, 102B, the fiber balls 106 and the fiber fillers 108 have been described above and will not be repeated here.

[0064] It is also worth mentioning that the fiber-filled flakes 200A are composed of a non-woven fiber web 210A and a plurality of fiber balls 106, but other components may also be used in the fiber-filled flakes 200A without affecting the excellent resilience, refluffing, water-resistant and warmth retention after water-washing of the fiber-filled flakes 200A. The same is true for the fiber-filled flakes 200B and 200C described later.

[0065] In some embodiments, the nonwoven fiber web 210A is composed of a plurality of solid fibers, and the solid fiber has a denier number of 0.8 to 15.0 deniers, preferably 1.0 to 7.0 deniers, and more preferably 1.3 deniers. In addition, when the solid fiber has a denier number less than 0.8 deniers, it is difficult to comb during the production process, and the nonwoven fiber web 210A obtained has insufficient stiffness. When the solid fiber has a denier number greater than 15 deniers, the nonwoven fiber web 210A feels too rough.

[0066] In some embodiments, the non-woven fiber web 210A may be needle-bonded non-woven fabric, air-through non-woven fabric, spunbonded non-woven fabric, meltblown non-woven fabric, or a combination thereof.

[0067] In some embodiments, the nonwoven fiber web 210A may be solid fibers, hollow fibers, or fibers with special cross-sections.

[0068] In some embodiments, the nonwoven fiber web 210A may be a synthetic fiber, a natural fiber or a combination thereof, wherein the synthetic fiber is, for example, a polyester fiber, a nylon fiber or a polyolefin fiber. Further, in some embodiments, the material of the solid fiber is a polyester fiber, for example, polyethylene terephthalate (PET), polypropylene terephthalate (PTT), polybutylene terephthalate (PBT) or a low melting point modified polyester, etc., preferably, polyethylene terephthalate.

[0069] In some embodiments, a nonwoven fiber web 210A is made of solid fibers (e.g., 1.3 denier solid fibers) to serve as an upper layer or a lower layer. Figure 4 Although the nonwoven fiber web 210A is shown as the upper layer, it can also be the lower layer, and the present invention is not limited thereto. Next, the at least two hollow polyester fibers (e.g. Figure 1, the fiber balls 106 made by mixing and rolling the hollow polyester fibers 102A, 102B are evenly laid under or over the non-woven fiber web 210A. Then, in some embodiments, the fiber balls 106 and the non-woven fiber web 210A are subjected to a non-woven reinforcement process, such as adhesive spraying, physical acupuncture, ultrasonic bonding, high-frequency bonding or a combination thereof, so that the fiber filler 108 is fixed under or over the non-woven fiber web 210A to obtain a fiber-filled flake 200A. In some embodiments, a preferred method is to reinforce by physical acupuncture, ultrasonic bonding and / or high-frequency bonding, so that the fiber filler 108 is fixed between the layers of the non-woven fiber web 210A, so as to avoid heat reinforcement or adhesives causing the fiber-filled flake 200A to feel rough or harden, thereby affecting the touch of the fiber-filled flake 200A. In some embodiments, it is more preferred to reinforce by physical acupuncture. It is worth mentioning that the embodiments of the present invention do not need to use low-melting-point hot-adhesive fibers or adhesives to reinforce the fiber balls 106 and the fiber balls 106. In this way, the impact on the touch of the fiber-filled flakes 200A is minimal or even nonexistent, and the resilience of the fiber-filled flakes 200A itself is not affected, and the re-fluffability of the fiber-filled flakes 200A is not affected.

[0070] See also Figure 5 , which is a cross-sectional schematic diagram of another embodiment of the fiber-filled flake of the present invention. The main difference between the fiber-filled flake 200B and the aforementioned embodiment is that, in this embodiment, the non-woven fiber web 210B is at least two pieces, and the fiber filler 108 is filled between the at least two pieces of the non-woven fiber web 210B to obtain the fiber-filled flake 200B, wherein the fiber filler 108 includes fiber balls 106. It is worth mentioning that, as mentioned above, the fiber balls 106 refer to the fiber balls 106A, the fiber balls 106B or a combination thereof. In addition, the other relevant technical features of the non-woven fiber web 210B, the fiber balls 106, the fiber filler 108 and the non-woven reinforcement process have been described above and will not be repeated here.

[0071] See also Figure 6, which is a cross-sectional schematic diagram of another embodiment of the fiber-filled flake of the present invention. The main difference between the fiber-filled flake 200C and the aforementioned embodiment is that in this embodiment, the non-woven fiber web 210C is U-shaped, and the fiber filler 108 is filled in the U-shaped structure to obtain the fiber-filled flake 200C, wherein the fiber filler 108 includes fiber balls 106. It is worth mentioning that, as mentioned above, the fiber balls 106 refer to fiber balls 106A, fiber balls 106B or a combination thereof. In some embodiments, these U-shaped non-woven fiber webs 210C are interconnected to form an S-shaped non-woven fiber web 210C to form a multi-layer stacking structure to obtain a non-woven fiber web 210C with a larger basis weight. In addition, the other relevant technical features of the non-woven fiber web 210C, the fiber balls 106, the fiber filler 108 and the non-woven reinforcement process have been described in the above and will not be repeated here.

[0072] Further, the characteristics of various embodiments of the fiber-filled batts 200A, 200B, and 200C are described. In some embodiments, the basis weight of the fiber balls 106 is 30 g / m 2 Up to 900g / m 2 The basis weight of the nonwoven fiber webs 210A, 210B, and 210C is 10 g / m 2 Up to 200g / m 2 Preferably, the basis weight of the fiber ball 106 is 40g / m 2 Up to 500g / m 2 The basis weight of the nonwoven fiber webs 210A, 210B, and 210C is 30 g / m 2 Up to 150g / m 2 More preferably, the basis weight of the fiber ball 106 is 40g / m 2 Up to 400g / m 2 The basis weight of the nonwoven fiber webs 210A, 210B, and 210C is 40 g / m 2 Up to 100g / m 2 In addition, the fiber ball 106 has a basis weight greater than 900 g / m 2 When the fiber filling sheets 200A, 200B, and 200C are too solid, the fiber balls 106 are tightly stacked, and the hand feel of the thermal insulation filling is too stiff. The basis weight of the fiber balls 106 is less than 30 g / m 2 When the basis weight of the fiber balls 106 is too low, the fiber balls 106 in the obtained fiber-filled flakes 200A, 200B, and 200C may be unevenly distributed, and voids may be easily generated, resulting in a decrease in warmth retention.

[0073] In some embodiments, the basis weight of the fiberfill batts 200A, 200B, 200C is 40 g / m 2Up to 1100g / m 2 Preferably, the basis weight of the fiber-filled flakes 200A, 200B, 200C is 70 g / m 2 Up to 650g / m 2 More preferably, the basis weight of the fiber-filled flakes 200A, 200B, 200C is 80 g / m 2 Up to 500g / m 2 .

[0074] In some embodiments, the weight percentage of the fiber balls 106 to the fiber-filled flakes 200A, 200B, and 200C is 5% to 95%, and the weight percentage of the non-woven fiber webs 210A, 210B, and 210C to the fiber-filled flakes 200A, 200B, and 200C is 5% to 95%. In addition, when the weight percentage of the fiber balls 106 is greater than 95%, the proportion of the non-woven fiber webs 210A, 210B, and 210C is too low, and the non-woven fiber webs 210A, 210B, and 210C are too thin, so that the assembled fiber-filled flakes 200A, 200B, and 200C have an unstable structure, which is not conducive to the fixation of the fiber-filled flakes 200A, 200B, and 200C. When the weight percentage of the fiber balls 106 is less than 5%, the proportion of the fiber balls 106 is too low, which will cause the fiber balls 106 in the obtained fiber-filled flakes 200A, 200B, 200C to be unevenly distributed, and gaps are easily generated, resulting in reduced warmth retention. Preferably, the weight percentage of the fiber balls 106 in the fiber-filled flakes 200A, 200B, 200C is 50% to 95%, and the weight percentage of the non-woven fiber webs 210A, 210B, 210C in the fiber-filled flakes 200A, 200B, 200C is 5% to 50%.

[0075] Next, various properties of the hollow polyester fibers 102A, 102B, fiber balls 106 and fiber-filled flakes 200A, 200B, 200C of the present invention are described by various embodiments and comparative examples. The following section describes the production process and properties of embodiments 1 to 8 and comparative examples 1 to 9.

[0076] Example 1

[0077] Hollow polyester fiber A (polyester fiber is 3 denier, hollowness 14%, curl 28.1%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) and hollow polyester fiber B (polyester fiber is 3 denier, hollowness 14%, curl 22.0%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) are respectively taken at a weight ratio of 1:1 (50g:50g), and the hollow polyester fiber A and the hollow polyester fiber B are mixed and balled using a ball rolling machine to form the fiber filling 108 of Example 1. Among them, the hollow polyester fiber A and the hollow polyester fiber B have the same denier number, and 45 hollow polyester fibers A and 45 hollow polyester fibers B are extracted from the fiber ball 106, and the average curl number (CN) of the constituent fibers is counted and calculated. The difference in the curl number (△CN) after balling between the hollow polyester fiber A and the hollow polyester fiber B is 4.0.

[0078] Example 2

[0079] Hollow polyester fiber B (polyester fiber is 3 denier, hollowness 14%, curl 22.0%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) and hollow polyester fiber C (polyester fiber is 3 denier, hollowness 14%, curl 12.3%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) are respectively taken in a weight ratio of 1:1 (50g:50g), and the hollow polyester fiber B and the hollow polyester fiber C are mixed and balled using a ball rolling machine to form the fiber filling 108 of Example 2. Among them, the hollow polyester fiber B and the hollow polyester fiber C have the same denier number, and 45 hollow polyester fibers B and 45 hollow polyester fibers C are extracted from the fiber ball 106, and the average curl number (CN) of the constituent fibers is counted and calculated, and the difference in the curl number (△CN) after balling between the hollow polyester fiber B and the hollow polyester fiber C is 5.0.

[0080] Example 3

[0081] Hollow polyester fiber A (polyester fiber is 3 denier, hollowness 14%, curl 28.1%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) and hollow polyester fiber C (polyester fiber is 3 denier, hollowness 14%, curl 12.3%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) are respectively taken at a weight ratio of 1:1 (50g:50g), and the hollow polyester fiber A and the hollow polyester fiber C are mixed and balled using a ball rolling machine to form the fiber filling 108 of Example 3. Among them, the hollow polyester fiber A and the hollow polyester fiber C have the same denier number, and 45 hollow polyester fibers A and 45 hollow polyester fibers C are extracted from the fiber ball 106, and the average curl number (CN) of the constituent fibers is counted and calculated, and the difference in the curl number (△CN) after balling between the hollow polyester fiber A and the hollow polyester fiber C is 9.0.

[0082] Example 4

[0083] Hollow polyester fiber E (polyester fiber is 1.5 denier, hollowness 8%, curl 13.1%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) and hollow polyester fiber F (polyester fiber is 7 denier, hollowness 22%, curl 22.2%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) are respectively taken at a weight ratio of 1:1 (50g:50g), and the hollow polyester fiber E and the hollow polyester fiber F are mixed and balled using a ball rolling machine to form the fiber filling 108 of Example 4. Among them, the hollow polyester fiber E and the hollow polyester fiber F have different denier numbers, and 45 hollow polyester fibers E and 45 hollow polyester fibers F are extracted from the fiber ball 106, and the average curl number (CN) of the constituent fibers is counted and calculated. The difference in the curl number (△CN) after balling of the hollow polyester fiber E and the hollow polyester fiber F is 9.0.

[0084] Example 5

[0085] Hollow polyester fiber B (polyester fiber is 3 denier, hollowness 14%, curl 22.0%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) and hollow polyester fiber F (polyester fiber is 7 denier, hollowness 22%, curl 22.2%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) are respectively taken at a weight ratio of 1:1 (50g:50g), and the hollow polyester fiber B and the hollow polyester fiber F are mixed and balled using a ball rolling machine to form the fiber filling 108 of Example 5. Among them, the hollow polyester fiber B and the hollow polyester fiber F have different denier numbers, and 45 hollow polyester fibers B and 45 hollow polyester fibers F are extracted from the fiber ball 106, and the average curl number (CN) of the constituent fibers is counted and calculated. The difference in the curl number (△CN) after balling between the hollow polyester fiber B and the hollow polyester fiber F is 6.0.

[0086] Example 6

[0087] Hollow polyester fiber E (polyester fiber is 1.5 denier, hollowness 8%, curl 13.1%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) and hollow polyester fiber F (polyester fiber is 7 denier, hollowness 22%, curl 22.2%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) are respectively taken at a weight ratio of 1:3 (25g:75g), and the hollow polyester fiber E and the hollow polyester fiber F are mixed and balled using a ball rolling machine to form the fiber filling 108 of Example 6. Among them, the hollow polyester fiber E and the hollow polyester fiber F have different denier numbers, and 45 hollow polyester fibers E and 45 hollow polyester fibers F are extracted from the fiber ball 106, and the average curl number (CN) of the constituent fibers is counted and calculated, and the difference in the curl number (△CN) after balling of the hollow polyester fiber E and the hollow polyester fiber F is 9.0.

[0088] Comparative Example 1

[0089] Take 100g of hollow polyester fiber E (polyester fiber is 1.5 denier, hollowness is 8%, curl is 13.1%, length is 38mm, elastic elongation is ≤50%, melting point is 250°C), and use a ball rolling machine to mix and ball the hollow polyester fiber E to form the fiber filling of Comparative Example 1, and the curl number difference (△CN) of Comparative Example 1 after balling is 0.

[0090] Comparative Example 2

[0091] Take 100g of hollow polyester fiber B (polyester fiber is 3 denier, hollowness is 14%, curl is 22.0%, length is 38mm, elastic elongation is ≤50%, melting point is 250℃), and use a ball rolling machine to mix and ball the hollow polyester fiber B to form the fiber filling of Comparative Example 2, and the curl number difference (△CN) of Comparative Example 2 after balling is 0.

[0092] Comparative Example 3

[0093] Take 100g of hollow polyester fiber F (polyester fiber is 7 denier, hollowness is 22%, curl is 22.2%, length is 38mm, elastic elongation is ≦50%, melting point is 250℃), and use a ball rolling machine to mix and ball the hollow polyester fiber F to form the fiber filling of Comparative Example 3, and the curl number difference (△CN) of Comparative Example 3 after balling is 0.

[0094] Comparative Example 4

[0095] Hollow polyester fiber C (polyester fiber is 3 denier, hollowness is 14%, curl is 12.3%, length is 38mm, elastic elongation is ≤50%, melting point is 250°C) and hollow polyester fiber F (polyester fiber is 7 denier, hollowness is 22%, curl is 22.2%, length is 38mm, elastic elongation is ≤50%, melting point is 250°C) are taken in a weight ratio of 1:1 (50g:50g), and the hollow polyester fiber C and the hollow polyester fiber F are mixed and balled using a ball rolling machine to form the fiber filling of Comparative Example 4, and the curl number difference (△CN) of Comparative Example 4 after balling is 1.0.

[0096] Comparative Example 5

[0097] Take 100g of hollow polyester fiber D (polyester fiber is 3 denier, hollowness is 14%, curl is 13.3%, length is 38mm, elastic elongation is ≤50%, melting point is 250℃), and use a ball rolling machine to mix and ball the hollow polyester fiber D to form the fiber filling of Comparative Example 5, and the curl number difference (△CN) of Comparative Example 5 after balling is 0.

[0098] Comparative Example 6

[0099] Hollow polyester fiber E (polyester fiber is 1.5 denier, hollowness 8%, curl 13.1%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C), hollow polyester fiber F (polyester fiber is 7 denier, hollowness 22%, curl 22.2%, length 38 mm, elastic elongation ≤ 50%, melting point 250°C) and low melting point thermal adhesive fiber (melting point 110°C) in a weight ratio of 2:2:1 (40g:40g:20g) are taken respectively, and the hollow polyester fiber E, hollow polyester fiber F and low melting point thermal adhesive fiber are mixed and balled using a ball rolling machine to form the fiber filling of Comparative Example 6, and the curl number difference (△CN) of Comparative Example 6 after balling is 9.0.

[0100] Next, examples 1 to 6 and comparative examples 1 to 6 of fiber fillers 108 made of various hollow polyester fibers 102A and 102B are described in Table 1A and Table 1B. Table 1A is a material property table of examples 1 to 6 according to the present invention; Table 1B is a material property table of comparative examples 1 to 6 according to the present invention. The fiber fillers 108 of the above-mentioned examples 1 to 6 are substantially spherical, and the basis weight of the fiber fillers 108 is 150 g / m 2 .

[0101] The bulkiness shown in Table 1A and Table 1B is related to the thermal insulation performance. The higher the bulkiness, the more thermal insulation air the textile can contain, and therefore the better the thermal insulation performance. The bulkiness test method is to take 50.0 grams (g) of fiber filler 108, put it into a hollow cylinder with an inner diameter of 16.5 cm, and apply a load of 31.0 g. Then, the stacking height (H) of the fiber filler 108 after 5 minutes is measured, and the bulkiness (V) is calculated according to the following formula (1).

[0102] Bulkiness (V) = πD 2 H / 4 --- Formula (1)

[0103] The compression recovery is tested according to the American Society for Testing and Materials (ASTM) D6571-01 specification for nonwoven fabrics, and the long-term compression recovery (%) of each sample is calculated, wherein the index value of the long-term compression recovery (%) is defined according to ADTM D6571-01.

[0104] Table 1A

[0105]

[0106] Table 1B

[0107]

[0108]

[0109] As mentioned above, the curling number of the hollow polyester fibers 102A and 102B will affect the telescopic deformation of the hollow polyester fibers 102A and 102B, and further affect the resilience of the obtained fiber ball 106A. For example, as shown in Table 1B, the curling number of the hollow polyester fiber D of Comparative Example 5 is relatively low (the curling number is 8), and the fiber ball made of the hollow polyester fiber D has poor resilience.

[0110] In addition, in Comparative Example 6 using low-melting point thermal adhesive fibers, since the low-melting point thermal adhesive fibers are solid fibers, the elastic deformation of the low-melting point thermal adhesive fibers is poorer than that of the hollow polyester fibers. Therefore, the fiber balls made of the low-melting point thermal adhesive fibers and the hollow polyester fibers (such as hollow polyester fibers E and F) have poor fluffiness and resilience.

[0111] Therefore, compared to comparison examples 1 to 5 in which the difference in the number of curls after balling (△CN) is ≤ 1, when the difference in the number of curls after balling of at least two hollow polyester fibers 102A and 102B is greater than 1.0, the fluffiness of the obtained fiber filler 108 is greater than 7500, and the resilience is greater than 73%, that is, the fiber filler 108 of various embodiments of the present invention has better fluffiness and resilience, and because the fiber fillers 108 of various embodiments do not need to be fixed to each other by low-melting point thermal adhesive fibers, the fiber filling flakes 200A, 200B, and 200C made of the fiber filler 108 with better fluffiness and resilience can have better re-fluffing properties, thereby allowing home textile filling materials (such as pillows, down, cushions, etc.) to maintain warmth (CLO).

[0112] Further, please refer to Table 2, which is a material property table of Preparation Examples 1-1 and 1-2 and Preparation Comparative Examples of fiber balls 106A mixed with fiber balls 106B according to the present invention. Preparation Example 1-1 is a fiber filler 108 composed of the fiber balls of Example 1 and the fiber balls 106 of Example 4 as shown in Table 1A, while Preparation Example 1-2 is a fiber filler composed of Example 2 as shown in Table 1A and Comparative Example 5 as shown in Table 1B, and the Preparation Comparative Example is a fiber filler composed of Comparative Example 1 and Comparative Example 3 as shown in Table 1B. Preparation Examples 1-1, Preparation Examples 1-2 and Preparation Comparative Examples in Table 2 are for illustrative purposes only and are not intended to limit the present invention.

[0113] Table 2

[0114]

[0115] As shown in Table 2, the bulkiness and resilience of Preparation Example 1-1 and Preparation Example 1-2 are both good. It should be noted that the fiber filler 108 of the present invention can also be used in Preparation Example 1-2 to achieve the desired effect by adding other types of fiber balls 106. In addition, as shown in Table 2, compared with the fiber balls 106 made of at least two hollow polyester fibers 102A and 102B with different CN numbers, the fiber balls 106 made of hollow polyester fibers with the same CN number are mixed in the Preparation Comparative Example, and the resilience of the Preparation Comparative Example is poor. In addition, the fiber balls 106 with better bulkiness and resilience will further affect the various properties of the fiber-filled flakes 200A, 200B, and 200C produced subsequently.

[0116] Further, please refer to Table 3, which is a comparison table of fiber-filled flakes according to various embodiments of the present invention and various comparative examples. A non-woven fiber web is made of solid fibers (1.3 denier solid fibers) to serve as the upper and lower layers. Next, the fiber filler is evenly spread above and below the non-woven fiber web. Then, the fiber filler is fixed between the non-woven fiber webs by physical needling to obtain a fiber-filled flake. In addition, it is worth mentioning that due to the large number of fiber balls in the fiber filler, the situation in which the fiber filler is fixed to the non-woven fiber web will include a part of the fiber balls being directly fixed to the non-woven fiber web by physical needling, and a part of the fiber balls being arranged between the aforementioned fiber balls to be indirectly fixed to the non-woven fiber web through the fiber balls fixed to the non-woven fiber web.

[0117] As shown in Table 3, the fiber-filled flakes of Example 7 are made of the fiber balls 106 of Example 1, the fiber-filled flakes of Example 8 are made of the fiber balls 106 of Example 4, the fiber-filled flakes of Comparative Example 7 are made of the fiber balls of Comparative Example 4, and the fiber-filled flakes of Comparative Example 8 are made of the fiber balls of Comparative Example 5, and the fiber-filled flakes of Comparative Example 9 are made of the fiber balls of Comparative Example 6.

[0118] Table 3

[0119]

[0120] In various embodiments, the resilience of the fiber-filled flakes 200A, 200B, and 200C obtained by the above process is greater than 80%. As mentioned above, the test method for resilience is based on ASTM D 6571-01. In addition, the resilience of the fiber balls 106 will affect the resilience of the fiber-filled flakes 200A, 200B, and 200C. For example, as shown in Table 3, in Comparative Example 7 (a fiber-filled flake made from the fiber balls of Comparative Example 4), the resilience of the fiber balls of Comparative Example 4 is 72%. For another example, in Comparative Example 8 (a fiber-filled flake made from the fiber balls of Comparative Example 5), the resilience of the fiber balls of Comparative Example 5 is 72%. The resilience of the fiber-filled flakes of Comparative Examples 7 and 8 is less than 80%. For another example, in Comparative Example 9 (a fiber-filled flake made from the fiber balls of Comparative Example 6), the resilience of Comparative Example 9 is poor (less than 80%) due to the use of low-melting-point thermal adhesive fibers for heat fixation. Accordingly, the fiber-filled flakes 200A, 200B, and 200C made of fiber balls 106 with a resilience lower than 73% also have poor resilience, which is not conducive to applications in bedding and clothing.

[0121] Furthermore, the CLO maintenance rate of the fiber-filled flakes 200A, 200B, and 200C after washing is tested. The method for testing the CLO maintenance rate after washing is to test the thermal insulation value of non-woven fabrics in accordance with the ASTM D1518-1985 test standard for thermal conductivity of textile materials and the textile washing method in accordance with the AATCC135 standard.

[0122] In some embodiments, the fiber-filled flakes 200A, 200B, and 200C are subjected to five water washing tests to detect the characteristic thermal insulation values ​​of the fiber-filled flakes 200A, 200B, and 200C before and after washing to obtain a ratio of the characteristic thermal insulation values ​​before and after washing, so as to obtain a basis for comparing the washability of the quantified fiber-filled flakes 200A, 200B, and 200C.

[0123] In various embodiments, the characteristic thermal insulation maintenance rate of the fiber-filled flakes 200A, 200B, and 200C is not less than 95%. In addition, the bulkiness of the fiber balls 106 will also affect the CLO maintenance rate of the fiber-filled flakes 200A, 200B, and 200C. For example, as shown in Table 3, in Comparative Example 7 (a fiber-filled flake made from the fiber balls of Comparative Example 4), the bulkiness of the fiber balls of Comparative Example 4 is 6700 cm 3 / 50g, for example, in Comparative Example 8 (a fiber-filled flake made from the fiber balls of Comparative Example 5), the bulkiness of the fiber balls of Comparative Example 5 is 7000cm 3 / 50g.

[0124] In addition, by comprehensively comparing Comparative Example 4 with Comparative Example 7, Comparative Example 4 is a fiber ball made of hollow polyester fibers with a curl number difference (△CN) ≦ 1, and Comparative Example 4 has poor fluffiness and resilience (compared to the fiber ball 106 made of at least two hollow polyester fibers 102A and 102B with different CN numbers), and the fiber-filled flakes of Comparative Example 7 made of the fiber ball of Comparative Example 4 after washing also have poor CLO thermal insulation maintenance rate. In a comprehensive comparison of Comparative Example 5 and Comparative Example 8, Comparative Example 5 is a fiber ball made of only a single hollow polyester fiber (hollow polyester fiber D), and the fiber ball made of a single hollow polyester fiber has poor fluffiness and resilience (compared to the fiber ball 106 made of at least two hollow polyester fibers 102A and 102B with different CN numbers), and the fiber-filled flakes of Comparative Example 8 made of the fiber ball of Comparative Example 5 also have poor CLO thermal insulation maintenance rate after washing. In addition, in a comprehensive comparison between Comparative Example 6 and Comparative Example 9, Comparative Example 6 is a fiber ball made of two hollow polyester fibers (hollow polyester fibers E and F) and low-melting point thermal adhesive fibers. Since Comparative Example 8 is fixed by heating with low-melting point thermal adhesive fibers, the fluffiness and resilience of the fiber ball of Comparative Example 6 are poor (less than 80%), and the CLO thermal insulation retention rate of the fiber-filled flakes of Comparative Example 9 made from the fiber ball of Comparative Example 6 after washing is also poor. Accordingly, when the fluffiness of the fiber ball 106 is less than 8000, the CLO retention rate of the fiber-filled flakes 200A, 200B, and 200C made from the fiber ball 106 is poor.

[0125] In addition, 3M TM Thinsulate TM The new Shirley hot air flakes are made of polyester fibers and low-melting point thermal adhesive fibers, and are obtained by hot air reinforcement. Moreover, the hot air flakes use the washing conditions of the present invention, and the CLO maintenance rate after 5 washings is low, only 60%. Based on this, it can be further confirmed that the CLO maintenance rate of the fiber-filled flakes will be affected by the method of heating and fixing, that is, the CLO maintenance rate of the fiber-filled flakes will be poor. The hollow polyester fibers 102A and 102B of the present invention are both non-low-melting point thermal adhesive fibers. Therefore, the obtained fiber-filled flakes 200A, 200B, and 200C have a better CLO maintenance rate.

[0126] As shown in Table 3, in various embodiments, the fiber-filled flakes 200A, 200B, and 200C are more resistant to washing. The fiber-filled flakes 200A, 200B, and 200C have a high warmth retention (CLO) maintenance rate after five washes, which is greater than 95%, and can reach 99.0%, and will not agglomerate after washing.

[0127] The fiber-filled flakes 200A, 200B, 200C of the embodiment of the present invention can be applied to, for example, bedding, down quilts, coats, down jackets, vests, tops, pants, hats, gloves, snow boots, and neck shawls.

[0128] In addition, if Figures 4 to 6 As shown, the fiber-filled flakes 200A, 200B, and 200C have different aspects. Through the fiber-filled flakes 200A, 200B, and 200C of different aspects, fiber-filled flakes 200A, 200B, and 200C with different basis weights, warmth retention, resilience, bulkiness, and warmth retention after washing and their fabrics can be obtained. For example, a coat can be filled with fiber-filled flakes 200A, 200B, or 200C with higher bulkiness and resilience to provide a softer touch, while snow boots can be filled with fiber-filled flakes 200A, 200B, or 200C with higher warmth retention to provide a more solid snow boot.

[0129] In summary, the present invention provides a fiber filling material with resilience and bulkiness, and the fiber balls of the fiber filling material can form a fiber filling flake with a nonwoven fiber web. In addition to having excellent resilience and bulkiness, the fiber filling flake can also maintain excellent water washing resistance and warmth retention after washing. In addition, after washing, the fiber filling flake will not agglomerate, so that the bedding and clothing made of the fiber filling flake have the advantages of excellent warmth retention, bulkiness and water washing resistance.

[0130] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the present invention. Anyone skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope defined by the attached claims.

Claims

1. A fiber filler, characterized in that: Include: A plurality of first fiber balls, each of which comprises a plurality of first hollow polyester fibers and a plurality of second hollow polyester fibers, wherein each of the first hollow polyester fibers has a first crimp number, and each of the second hollow polyester fibers has a second crimp number different from the first crimp number, The difference between the first curling number and the second curling number is greater than 1.

2. The fiber filler according to claim 1, characterized in that The difference between the first curl number and the second curl number is 2 to 12.

3. The fiber filler according to claim 2, characterized in that: The difference between the first curl number and the second curl number is 4 to 10.

4. The fiber filler according to claim 1, characterized in that A first elastic elongation of each of the first hollow polyester fibers is not higher than 50%, and a second elastic elongation of each of the second hollow polyester fibers is not higher than 50%.

5. The fiber filler according to claim 1, characterized in that The denier number of each of the first hollow polyester fibers is 0.5 denier to 40 deniers, and the denier number of each of the second hollow polyester fibers is 0.5 denier to 40 deniers.

6. The fiber filler according to claim 1, characterized in that: The average maximum outer diameters of the plurality of first fiber balls are distributed in a range of 0.5 mm to 15 mm.

7. The fiber filler according to claim 1, characterized in that The resilience of the plurality of first fiber balls is not less than 74%.

8. The fiber filler according to claim 1, characterized in that The bulkiness of the plurality of first fiber balls is not less than 8000 cm 3 / 50g.

9. The fiber filler according to claim 1, characterized in that The materials of the first plurality of hollow polyester fibers and the second plurality of hollow polyester fibers include polyester fibers derived from petroleum, polyester fibers derived from biomass, polyester fibers containing recycled materials, biodegradable polyester fibers or a combination thereof.

10. The fiber filler according to claim 1, characterized in that It also includes a plurality of second fiber balls, each of which includes a plurality of third hollow polyester fibers and a plurality of fourth hollow polyester fibers, wherein each of the third hollow polyester fibers has a third crimp number, and each of the fourth hollow polyester fibers has a fourth crimp number different from the third crimp number.

11. A fiber-filled flake, characterized in that: It is composed of at least one non-woven fiber web and a plurality of fiber balls. The multiple fiber balls are fixed to the non-woven fiber web, wherein each of the fiber balls includes a plurality of first hollow polyester fibers and a plurality of second hollow polyester fibers, wherein each of the first hollow polyester fibers has a first curl number, each of the second hollow polyester fibers has a second curl number different from the first curl number, and the difference between the first curl number and the second curl number is greater than 1.

12. The fiber-filled batt according to claim 11, characterized in that The melting point of each of the first hollow polyester fibers is not less than 220° C., and the melting point of each of the second hollow polyester fibers is not less than 220° C.

13. The fiber-filled batt according to claim 11, characterized in that The denier number of each of the first hollow polyester fibers is 0.5 denier to 40 deniers, and the denier number of each of the second hollow polyester fibers is 0.5 denier to 40 deniers.

14. The fiber-filled batt according to claim 11, characterized in that The characteristic thermal insulation maintenance rate of the fiber-filled flakes is not less than 95%.

15. The fiber-filled batt according to claim 11, characterized in that The basis weight of the fiber filled flakes is 40 g / m 2 Up to 1100g / m 2 .

16. The fiber-filled batt according to claim 11, characterized in that The basis weight of the plurality of fiber balls is 30 g / m 2 Up to 900g / m 2 , and the basis weight of the nonwoven fiber web is 10g / m 2 Up to 200g / m 2 .

17. The fiber-filled batt of claim 11, wherein: The fiber-filled flakes have a resilience of not less than 80%.

18. The fiber-filled batt of claim 11, wherein: The weight percentage of the plurality of fiber balls in the fiber-filled flakes is 5% to 95%.

19. The fiber-filled batt of claim 11, wherein: The plurality of fiber balls are fixed to the nonwoven fiber web by physical needle punching.

20. The fiber-filled batt of claim 11, wherein: The fiber-filled flakes are suitable for being further prepared into bedding, down quilts, coats, down jackets, vests, coats, pants, hats, gloves, snow boots and neckbands.

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