WO2022088617A1

WO2022088617A1 - Machine-washable high-fill power thermally-insulating filling material

Info

Publication number: WO2022088617A1
Application number: PCT/CN2021/087506
Authority: WO
Inventors: 王志军
Original assignee: 青岛热源纤维科技有限公司
Priority date: 2020-10-28
Filing date: 2021-04-15
Publication date: 2022-05-05
Also published as: CN112323252A

Abstract

A machine-washable high-fill power thermally-insulating filling material, pertaining to the field of machine-washable thermally-insulating filling materials. In view of the relationship between the diameter, crimp morphology, crimp percentage, and length of bearing fibers and split fibers and the fill power, washing resistance, and thermal insulating properties of a resultant fiber ball aggregate, in order to obtain a proper fiber ball aggregate, the fiber ball aggregate is consists of two or more different fibers, wherein fibers with a small number of crimps and a large crimp percentage are used as bearing fibers and to mainly build space, improve fill power, reduce the possibility of entanglement between fibers, and prevent agglomeration and clustering due to entanglement between fibers from use or machine washing, and fibers with a large number of crimps and a low crimp percentage are used as split fibers and to mainly split up air inside the fiber ball aggregate, stabilize the spherical structure, and improve the compression, rebounding and recovery capabilities.

Description

A machine washable high loft insulation filling material

technical field

The invention relates to the field of machine-washable thermal insulation filling materials, and more particularly, to a machine-washable high bulkiness thermal insulation filling material.

Background technique

A wide variety of natural and synthetic filling materials are known for thermal insulation filling materials, down jackets, sleeping bags and duvets. Natural feather down has been widely accepted for thermal insulation applications, mainly due to its excellent thermogravimetric efficiency, softness, resilience, wash durability and shakeability. Natural down is often considered the thermal insulation material of choice. However, natural down loses thermal insulation properties when it gets wet, and emits a rather unpleasant odor when exposed to moisture. At the same time, many people are allergic to natural down, which affects the range of applications of natural down. In addition, as a natural material, down and feathers cannot be industrially produced, the cost is high, and the source is unstable, and it is easily affected by factors such as animal diseases. Water pollution caused by waterfowl excrement, the occurrence and spread of infectious diseases, and in Europe and other places, there is also a trend to abolish feathers from the viewpoint of animal protection. For this reason, artificial thermal insulation filling materials have been more and more widely used.

In order to solve the above problems, many attempts have been made to prepare synthetic-based fiber structures or materials having the characteristics and structure of natural down. Natural down is difficult to replicate due to its unique structure and properties: namely warmth per unit weight, compression recovery, shakeability and wash resistance. Because the structure of natural down is very complex, it is difficult for man-made fibers to completely simulate its shape, so it is difficult for man-made fibers to achieve similar properties to natural down in terms of warmth retention, bulkiness, and filling. Various shapes of fibers have been proposed, such as spherical (U.S. Patent No. 4,065,599), spherical with protruding fibers for interlocking (U.S. No. 4,418,103), combinations of looped fibers (U.S. Patent No. 3,892,909), The above are just to name a few. In addition, fibrous tufts formed from broken batts such as disclosed in US Patent No. 6,329,051 entitled "Blowable Insulation Clusters" and such clusters such as disclosed in US Patent No. 6,329,052 entitled "Blowable Insution" A mixture of natural fibers such as fluff, especially suitable for use as insulation/filling material. Mixtures of macrofibers and microfibers disclosed in US Patent No. 4,992,326 entitled "Synthetic Down" are good insulating filler materials in batt or tuft form. Also, the insulation/filler compositions disclosed in US Patent Nos. 4,588,635 and 5,043,207 are also suitable for use as a substitute for natural insulation materials. Fiber balls (or fiber clusters) are very close to natural down in terms of structure and shape. These fiber balls can realize the shakeability of down, for example, and can move in the mattress cover and can be re-patted. The existing technology or products are durable in washing. There is still a big gap between down and down in terms of agent performance, heat preservation and touch, especially due to friction during use, especially after the lotion, the fibers are easy to agglomerate, entangle and harden together, and eventually lose comfort. and thermal insulation properties.

SUMMARY OF THE INVENTION

1. Technical problems to be solved

In view of the problems existing in the prior art, an object of the present invention is to provide a filler that is not only lightweight but also has excellent bulkiness, is soft and has a touch similar to that of feathers, and is especially machine washable and is suitable for use as a pad, down jacket, etc. aggregates of microfiber spheres.

2. Technical solutions

In order to solve the above problems, the present invention adopts the following technical solutions.

A machine-washable high-bulk thermal insulation filling material, comprising a fiber ball assembly, wherein the fiber ball assembly is filled with load-bearing fibers and split fibers, and the load-bearing fibers and the split fibers are randomly arranged in the fiber ball assembly. , intertwined with each other, one end of a plurality of the bearing fibers penetrates the fiber ball aggregate and extends to the outside of the fiber ball aggregate, the average diameter of the fiber ball aggregate is 2-15mm, preferably 3 mm in diameter -8mm, the maximum cross-sectional size of the fiber ball aggregate is not more than 2 times the minimum cross-sectional size, the load-bearing fibers are thick and short fibers, and the load-bearing fibers are hollow structures, and the split fibers are ultrafine short fibers, It is possible to provide an aggregate of microfiber balls that are not only lightweight but also have excellent bulkiness, are soft and have a feel similar to that of feathers, and are especially machine washable and are suitable for use as fillers for cushions, down jackets, and the like.

Further, the load-bearing fibers and the split fibers can be selected from synthetic short fibers or natural fibers, the proportion of the load-bearing fibers is 0-80%, and the proportion of the split fibers is 20-100%.

Further, the average diameter of the load-bearing fibers is 1.5dtex-7dtex, and the cut length is 16-76mm of synthetic fibers, and the average diameter of the split fibers is less than 1.0dtex, and the cut length is 10-60mm. Synthetic fibers or natural fibers.

[Corrected 12.08.2021 in accordance with Rule 91]
Further, the crimping form of the carrier fiber is three-dimensional helical crimping (including Ω crimping type) or two-dimensional mechanical crimping, the number of crimps is 3-20 pieces/25mm, and the crimp rate is 6-14%.

Further, the crimped morphological structure of the split fibers is a two-dimensional plane crimp, the number of crimps is 3-18/25mm, and the crimp rate is 3-14%.

Further, the bearing fibers and the split fibers can be selected from polyethylene terephthalate, polytrimethylene terephthalate, poly-1,4-cyclohexane dimethyl terephthalate, poly Short fibers made of pivalolactone or their copolyesters, cotton blends of these short fibers, or conjugated fibers made of two or more of the above-mentioned polymer components, etc., and the crimps are slightly crimped by heat treatment or the like potential crimped fibers.

Further, the natural fibers are selected but not limited to animal and plant fibers such as wool fibers, cotton fibers, and hemp fibers.

Further, the bearing fibers and the split fibers are mixed with a lubricant in a proportion of 0.1-1.2% relative to their own mass, and the lubricant can improve the entanglement effect between the bearing fibers and the split fibers and between different split fibers and the split fibers, It is not easy to cause agglomeration and agglomeration due to entanglement between the plurality of bearing fibers and the split fibers.

Further, the moisture regain of the load-bearing fibers and the split fibers is 0.1-3%.

3. Beneficial effects

Compared with the prior art, the advantages of the present invention are:

This solution provides a microfiber ball aggregate that achieves the thermal insulation effect of down, can be machine washed, has excellent compression resilience, and is soft to the touch. It is suitable for the use of split fibers. At the same time, in order to obtain the ideal shape, support capacity and compression resilience of fiber ball aggregates, it is necessary to compound a certain proportion of load-bearing fibers.

This scheme focuses on the relationship between the diameter, crimp shape, crimp rate and length of the load-bearing fibers and split fibers and the bulkiness, water washing resistance and heat preservation of the obtained fiber ball aggregate. In order to obtain an appropriate fiber ball aggregate, the fiber The ball aggregate is composed of two or more fibers with different crimp numbers and crimp rates. The fibers with less crimp number and high crimp rate are used as load-bearing fibers, which mainly play the role of building space, improve bulkiness, and reduce fiber and fiber. The entanglement between fibers can prevent the entanglement of fibers and fibers during use or machine washing, resulting in agglomeration and agglomeration. Fibers with a large number of crimps and a low crimp rate are used as split fibers, which are mainly used to split the air inside the fiber ball. , Stabilize the spherical structure and improve the recovery ability of compression and rebound.

Description of drawings

Fig. 1 is the structural representation of the fiber ball aggregate of the present invention;

2 is a cross-sectional view of a load bearing fiber cluster of the present invention;

3 is a cross-sectional view of a split fiber cluster of the present invention;

Fig. 4 is the bulkiness test result table of each embodiment of the present invention and comparative example sample;

Fig. 5 is the thermal insulation test result table of each embodiment of the present invention and comparative sample;

Fig. 6 is the washing-drying durability evaluation standard table of the present invention;

Fig. 7 is the washing durability test result table of each embodiment of the present invention and comparative example sample;

Fig. 8 is the 30-day compression recovery performance test result of the sample of Example 2 of the present invention and the sample of Comparative Example 1;

FIG. 9 is a 60-day compression recovery performance test result of the sample of Example 2 and the sample of Comparative Example 1 of the present invention.

Detailed ways

The following will combine the drawings in the embodiments of the present invention; the technical solutions in the embodiments of the present invention will be described clearly and completely; obviously; the described embodiments are only a part of the embodiments of the present invention; rather than all the embodiments, based on The embodiments of the present invention; all other embodiments obtained by those of ordinary skill in the art without creative work; all belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer", "top/bottom", etc. are based on the orientations shown in the accompanying drawings Or the positional relationship is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed to indicate or imply relative importance.

In the description of the present invention, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "provided with", "sleeve/connection", "connection", etc., should be understood in a broad sense, such as " Connection", which can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be an internal connection between two components. of connectivity. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Example:

Please refer to Figure 1-3, a machine washable high loft thermal insulation filling material, including fiber ball assembly, the fiber ball assembly is filled with load-bearing fibers and split fibers, and the load-bearing fibers and split fibers are cluttered in the fiber ball assembly. Arranged in sequence, intertwined with each other, one end of the plurality of load-bearing fibers penetrates the fiber ball assembly and extends to the outside of the fiber ball assembly.

In particular, the average diameter of the fiber ball aggregate is 2-15mm, preferably 3-8 mm in diameter, the largest cross-sectional dimension of the fiber ball aggregate is not more than 2 times the smallest cross-sectional size, and more than 60% by weight of the fiber ball aggregate The body has the above-mentioned cross section, the load-bearing fibers are thick and short fibers, and the load-bearing fibers have a hollow structure, which further increases the elasticity of the load-bearing fibers, and the split fibers are ultra-fine short fibers. The indicator is that its cohesion force is less than 6N.

Both load-bearing fibers and split fibers can be selected from synthetic short fibers or natural fibers, the proportion of load-bearing fibers is 0-80%, the preferred proportion is 15-50%, the proportion of split fibers is 20-100%, and the preferred proportion is 40- 70%.

The average diameter of the load-bearing fibers is 1.5dtex-7dtex, and the cut length is 16-76mm. The preferred average diameter is 2dtex-5dtex, and the cut length is 20-51mm. The average diameter of the split fibers is 1.0dtex or less, and the cut length is 10-60mm. The preferred average diameter is 0.01-0.7dtex, and the cut length is 16-32mm.

[Corrected 12.08.2021 in accordance with Rule 91]
The crimping form of the carrier fiber is three-dimensional helical crimping including Ω crimping or two-dimensional mechanical crimping, preferably three-dimensional helical crimping composite short fibers, and the number of crimps is 3-20/25mm, and the preferred number of crimps is 4-12/25mm. , the crimp rate is 6-14%, preferably 8-12%, the crimp morphological structure of the split fibers is a two-dimensional plane crimp, the number of crimps is 3-18/25mm, and the preferred number of crimps is 6-12/ 25mm, the crimp rate is 3-14%, preferably 5-10%.

The load-bearing fibers and split fibers can be selected from polyethylene terephthalate, polytrimethylene terephthalate, poly-1,4-cyclohexane dimethyl terephthalate, polypivalactone or Among these short fibers, polyethylene terephthalate is preferred, such as short fibers made of their copolyesters, cotton blends of these short fibers, or conjugate fibers made of two or more of the above-mentioned polymer components. Ester, polypropyl terephthalate or short fibers of polybutylene terephthalate. In particular, two kinds of polyethylene terephthalate, polytrimethylene terephthalate or their combination can also be selected from different inherent viscosities, and the curl has the potential of micro curl by heat treatment, etc. Crimped fibers.

Natural fibers are selected but not limited to wool fibers, cotton fibers, hemp fibers and other animal and plant fibers.

The load-bearing fibers and the split fibers are mixed with lubricant in a proportion of 0.1-1.2% relative to their own mass. The lubricant can improve the entanglement effect between the load-bearing fibers and the split fibers and between different split fibers and split fibers, so that multiple load-bearing fibers can be It is not easy to cause agglomeration and agglomeration due to entanglement with the split fibers.

The moisture regain of the load bearing fibers and the split fibers is 0.1-3%, and the preferred moisture regain is 0.5-1.5%.

Specific examples:

Example 1:

In the present embodiment, the load-bearing fibers and the split fibers are all selected from synthetic short fibers, and the specific conditions are as follows:

The load-bearing fiber is made of silicon-added polyester staple fiber, with a diameter of 3.3D, a length of 32mm, the number of crimps 12-14/25mm, a crimp rate of 12%, a three-dimensional hollow spiral crimp, a moisture regain <1%, and a silicon-added polyester for the split fiber. Short fiber, diameter 0.7D, length 22mm, crimp number 12/25mm, crimp rate 8%, two-dimensional plane crimp, moisture regain <1%.

The load-bearing fibers and the split fibers are mixed at a ratio of 35% and 65%, and then the fluffy fiber balls with a diameter of 5-8 mm are produced after opening and making fiber balls, which are the samples of this example.

Example 2:

The load-bearing fiber is made of silicon-added polyester staple fiber, with a diameter of 3D. According to the length and crimp rate, it is divided into load-bearing fiber A and load-bearing fiber B. The length of load-bearing fiber A is 32mm, the number of crimps is 6/25mm, the crimp rate is 12%, and the three-dimensional Hollow spiral crimp, moisture regain <1%, bearing fiber B length 38mm, number of crimps 3/25mm, crimp rate 18%.

The split fibers are made of silicon-added polyester staple fibers, with a diameter of 0.5D, a length of 18mm, the number of crimps: 12/25mm, a crimp rate of 8%, two-dimensional mechanical crimp, and moisture regain <1%.

The above-mentioned load-bearing fibers A, load-bearing fibers B and split fibers are mixed in proportions of 25%, 35% and 45%, and then through processes such as opening and making fiber balls to produce a fluffy aggregate with a diameter of 6-10 mm, which is Sample of this example.

Comparative Example 1:

Silicon-added polyester staple fibers are selected, with a diameter of 3D, a length of 38mm, the number of crimps 3/25mm, and a crimp rate of 18%, and the above-mentioned short fibers are opened and made into fiber balls. The fluffy fiber ball is the sample of this comparative example.

Comparative Example 2:

90% duck down is selected, and the bulkiness is 600, which is the sample of this comparative example.

Performance Testing

1. Bulkiness

Bulkiness was evaluated by testing the Example 1 sample, the Example 2 sample, the Comparative Example 1 sample, and the Comparative Example 2 sample. The bulkiness test is obtained by measuring the volume occupied by a certain amount of samples in a container of a certain diameter under constant weight pressure. According to the test method of IDFB-2010, after adjusting the sample for 48±24 hours in an environment set to 20±2℃ and 65±4%RH relative humidity, take 30 grams of sample and put it into the diameter of 28.8cm, In a plexiglass measuring cylinder with a height of 500mm, manually stir 5 times with a stirring stick, and slowly put down the pressure plate with a weight of 94.25g. After the pressure plate touches the sample for 1 minute, read the height of the sample in the measuring cylinder and the bulkiness. The calculation formula is: FP=πd ² H/4, the unit is in ³ /30g; measure 3 times and take the average value.

Referring to Figure 4, the bulkiness of the samples of Example 1 and Example 2 is similar to that of the samples of Comparative Example 2, while the bulkiness of the samples of Comparative Example 1 is much lower than that of the samples of Example 2, namely the samples of Example 1 and the samples of Example 2 Comparable Example 2 samples composed of natural materials can be substituted in terms of bulk.

2. Thermal insulation/heat transfer resistance test

The thermal insulation heat transfer resistance of the examples is measured in clos according to ASTM D1518-85. Similar tests were performed on the thermal insulation properties of comparative insulating filler materials using the ASTM Thermal Insulation Tester.

Please refer to FIG. 5 , the thermal insulation properties of the samples of Example 1 and Example 2 are similar to those of the samples of Comparative Example 2, while the thermal insulation properties of the samples of Comparative Example 1 are much lower than those of the samples of Example 2, namely the samples of Example 1 and the samples of Example 2 The sample of Comparative Example 2 composed of natural materials can be substituted in terms of thermal insulation.

3. Washing durability test

The washing durability samples were made as follows: Fabric: 20D ripstop nylon anti-feather cloth, sewn into 30*30cm pieces, and then divided into 5 grids in one direction to form 6*30cm channels, each There are 5 channels in total. Fill the sample at 144 g/m², ie 2.6 g per channel. The sample of Example 1, the sample of Example 2, the sample of Comparative Example 1, and the sample of Comparative Example 2 were respectively filled into the cut pieces.

Wash durability was evaluated by subjecting the samples to the following tests as follows. Before washing in a conventional automatic pulsator washing machine, measure and record the bulkiness and warmth retention value of the samples. Test and calculate according to JIS L1930-2014 Home Laundering Test Method for Fiber Products, with clO as the unit. The washing machine settings were selected as "Standard Wash Mode", 40 degree water wash, rinse, spin cycle and normal soil wash settings. 53.2 grams of detergent was added to the tub of the washing machine and the wash cycle started. After the washing tub is filled with water for 20-30 seconds, put 10-12 samples and the accompany cloth sample and the accompany cloth together with a total of 2kg into the washing tub of the washing machine. When the washing cycle is completed, put all the The samples were transferred to a conventional automatic laundry dryer. The dryer is set to "soft". After drying for 60 minutes, the samples were removed. Conditioned for 48±24 hours in an environment set at 20±2°C and 65±4% RH (relative humidity), the bulkiness and warmth retention values of the filling material in the washed/dried samples were measured and recorded. The exterior of the washed/dried coupons was visually evaluated along at least one passage of the coupons and rated on a 1-5 scale according to the guidelines of the Wash-Drying Durability Evaluation System. Additionally, the wash/dry samples were cut and the interior of at least one channel was visually evaluated on a scale of 1-5 according to the guidelines of the "Wash Dry Durability Evaluation System".

The specific criteria for the evaluation of the washing durability test are shown in Figure 6, and the results of the washing durability test are shown in Figure 7. After 5 washing cycles and ten washing cycles of the samples of Example 1 and Example 2, the bulkiness and The heat retention rate is much higher than that of the sample in Comparative Example 1 and slightly lower than that of the sample in Comparative Example 2. The samples of Example 1 and Example 2 have greatly increased their own washing durability, and can be a better substitute for the sample of Comparative Example 1. 2 samples.

4. Compression-recovery performance test

Compression recovery test The compression recovery performance test is carried out according to the state of the insulating and thermal insulation filling material, such as the packaging of the insulation and thermal insulation material, in order to save storage space and transportation costs, it is hoped that the compression rate is the highest. stacked. The compression recovery performance test simulates the actual use state to test, and the test is carried out according to the following conditions: each sample of Example 2 is packed in 20kg, the volume before compression is 5.67m ³ , the volume after compression is: 0.296m ³ , and the compression rate is 94.8% ;

The sample of Comparative Example 1 is packaged by 20kg each, the volume before compression is 4.58m ³ , the volume after compression is: 0.238m ³ , and the compression rate is 94.8%;

Compression time: 30 days, 60 days; stacking height: 3 layers; test the compression recovery performance of different samples by testing the bulkiness value of different stacking layers and different compression times. According to the IDFB-2010 test method, the samples were conditioned for 48 ± 24 hours in an environment set to 20 ± 2°C and 65 ± 4% RH relative humidity to test the bulkiness value.

Compression ratio%=(V ₀ -V ₁ /V ₀ *100%, V ₀ refers to the volume of the sample before compression; V ₁ refers to the volume after compression;

Recovery rate %=FP ₀ -FP ₁ /FP ₀ * ₁₀₀ %, FP ₀ refers to the bulkiness of the sample before compression, and FP1 refers to the bulkiness of the sample after compression.

Please refer to Fig. 8 and Fig. 9, compared with the sample of Comparative Example 1, the bulkiness and recovery rate of the sample of Example 2 after compressing for 30 days and 60 days are much higher than those of the sample of Comparative Example 1, that is, by two or more The bulkiness and recovery rate of the sample of Example 2 with different fibers are much higher than those of the sample of Comparative Example 1, which only selects one fiber, and the bulkiness and recovery rate of the sample of Example 2 do not change much after 30 and 60 days of compression, which is suitable for a long time. use.

This solution provides a microfiber ball aggregate that achieves the thermal insulation effect of down, can be machine washed, has excellent compression resilience, and is soft to the touch. It is suitable to use split fibers. At the same time, in order to obtain the ideal fiber ball shape, support capacity and compression resilience, it is necessary to compound a certain proportion of load-bearing fibers.

This scheme focuses on the relationship between the diameter, crimp shape, crimp rate and length of the load-bearing fibers and split fibers and the bulkiness, water washing resistance and heat preservation of the obtained fiber ball aggregate. In order to obtain an appropriate fiber ball aggregate, the fiber The ball aggregate needs to be composed of two or more fibers with different crimp numbers and crimp ratios. Among them, the fibers with a small number of crimps and a large crimp ratio are used as load-bearing fibers, which mainly play the role of building space, improve bulkiness, and reduce fibers. The ability to entangle with fibers, preventing the entanglement of fibers and fibers during use or machine washing, resulting in agglomeration and agglomeration. Fibers with a large number of crimps and a low crimp rate are used as split fibers, which are mainly used to split fiber ball collections Air inside the body, stabilize the spherical structure and improve the recovery ability of compression rebound.

The above is only a preferred embodiment of the present invention; but the protection scope of the present invention is not limited to this; any person skilled in the art is within the technical scope disclosed by the present invention; according to the technical solution of the present invention equivalent replacements or changes to its improved ideas; all should be covered within the protection scope of the present invention.

Claims

A machine-washable high-bulk thermal insulation filling material, comprising a fiber ball assembly, characterized in that: the fiber ball assembly is wound into a spherical shape by bearing fibers and split fibers, and the bearing fibers and split fibers are assembled in the fiber balls Disorderly arrangement in the body, intertwined with each other, one end of the plurality of bearing fibers penetrates the fiber ball aggregate and extends to the outside of the fiber ball aggregate, and the average diameter of the fiber ball aggregate is 2- 15mm, preferably 3-8mm in diameter, the maximum cross-sectional size of the fiber ball aggregate is not more than 2 times the minimum cross-sectional size, the load-bearing fibers are thick denier staple fibers, and the load-bearing fibers are hollow structures, and the split fibers For ultrafine staple fibers.
A machine-washable high-bulk thermal insulation filling material according to claim 1, characterized in that: the load-bearing fibers and the split fibers can be selected from synthetic short fibers or natural fibers, and the ratio of the load-bearing fibers is 0- 80%, and the proportion of the split fibers is 20-100%.
A machine-washable high-bulk thermal insulation filling material according to claim 1, characterized in that: the average diameter of the load-bearing fibers is 1.5dtex-7dtex, the cut length is 16-76mm of synthetic fibers, and the split fibers Synthetic fibers or natural fibers with an average diameter of 1.0 dtex or less and a cut length of 10-60 mm.
[Corrected 12.08.2021 in accordance with Rule 91]
The machine-washable high-loft thermal insulation filling material according to claim 1, wherein the crimping form of the load-bearing fibers is a three-dimensional spiral crimp (including an Ω crimp) or a two-position mechanical crimp, and the number of crimps is It is 3-20 pieces/25mm, and the curling rate is 6-14%.
The machine-washable high-loft thermal insulation filling material according to claim 1, wherein the crimped morphological structure of the split fibers is a two-dimensional plane crimp, the number of crimps is 3-18/25mm, and the crimps are 3-18/25mm. The rate is 3-14%.
A machine-washable high-bulk thermal insulation filling material according to claim 1, wherein the load-bearing fibers and the split fibers can be selected from polyethylene terephthalate, polyethylene terephthalate, and polypropylene terephthalate. Short fibers made of base esters, poly-1,4-cyclohexane dimethyl terephthalate, polypivalactone or their copolyesters or blended bodies of these short fibers or composed of the above-mentioned polymer components Conjugated fibers, etc., made of two or more kinds of them, and crimped potential crimped fibers with slight crimps by heat treatment or the like.
A machine-washable high-bulk thermal insulation filling material according to claim 1, characterized in that: the natural fibers are selected from but not limited to wool fibers, cotton fibers, hemp fibers and other animal and plant fibers.
The machine-washable high bulkiness thermal insulation filling material according to claim 1, characterized in that: lubricants are attached to the surface of the load-bearing fibers and the split fibers in a proportion of 0.1-1.2% relative to their own mass.
The machine-washable high-bulk thermal insulation filling material according to claim 1, wherein the moisture regain of the load-bearing fibers and the split fibers is 0.1-3%.