WO2019101003A1

WO2019101003A1 - Filler and use thereof

Info

Publication number: WO2019101003A1
Application number: PCT/CN2018/115788
Authority: WO
Inventors: 顾金凤; 景红川; 许金碧; 铃木英俊
Original assignee: 东丽纤维研究所（中国）有限公司
Priority date: 2017-11-23
Filing date: 2018-11-16
Publication date: 2019-05-31
Also published as: TW201925560A

Abstract

A filler and a use thereof, the filler comprising short fibre cotton formed from core fibre and sheath fibre, the core fibre being composed of a low melting point fibre and a high melting point fibre, the low melting point fibre melting to cause fixation of the core fibre and the sheath fibre, the average length of the core fibre being 1-10 cm and the standard deviation of the length being 0-1.6, and the bulkiness of the short fibre cotton being 200-800 inch3/30 g.

Description

Filler and use thereof

Technical field

The invention relates to a filler and its use.

Background technique

In many types of insulation fillers, feathers are often used for making quilts or down jackets for their long-term importance because of their excellent lightness, bulkiness and heat retention.

However, natural feathers come from waterfowl and there are many defects. For example, 1 production cost is high, supply is limited, and its price is subject to large changes in market supply and demand; 2 a large amount of sewage, waste water, etc. are generated in the production process, which brings problems of environmental pollution, and feathers are not adequately washed. In addition, it will produce bad odor; 3 is not suitable for machine washing. Generally, the density of the fabric used as the tarpaulin is relatively large. The washing machine is easy to bulge and wash when it is washed, and the down is easy to be distorted after washing, resulting in poor local warming.

The chemical fiber filler has the advantages of lightweight and natural feather, and has the advantages of anti-bacterial and moisture-proof, cost stability, and low price. For example, Chinese Patent Publication No. CN103097280A discloses a filling object, wherein the inner filling is a long fiber filled cotton formed by integrating a core wire and a fancy wire, and the fancy wire is opened to form a loop fiber, and a long fiber cotton. It is multi-filamented in at least one direction and is sewn together with the cover cloth to integrate with the cover cloth, effectively solving the above defects of the down filling, and the hand feeling, bulkiness and the like are also shorter than ordinary short fibers. Cotton is good, but such fillers can only be filled by hand, costly, inefficient, and still lacking in fluffiness.

Summary of the invention

It is an object of the present invention to provide a filler which can be used in place of down and which can be filled by a filling machine and its use.

The filler of the present invention comprises short fiber cotton formed by a core fiber and a sheath fiber. The core fiber is composed of a low melting point fiber and a high melting point fiber, and the low melting point fiber is melted to fix the core fiber and the sheath fiber, and the average length of the core fiber is 1 to The standard deviation of 10 cm and length is 0 to 1.6, and the bulkiness (FP value) of staple fiber is 200 to 800 inch ³ / 30 g.

The filler of the present invention comprises a staple fiber cotton composed of a core-sheath fiber, and the core fiber and the sheath fiber are fixed due to the melting of the low-melting fiber in the core fiber constituting the staple fiber cotton, and the core-sheath structure is maintained, and the long fiber is maintained. Compared with cotton, such short-fiber cotton has better bulkiness, and there is no problem of washing and agglomeration. In particular, feather filling machine can be used for filling, which improves the shortcoming of low-fiber cotton filling efficiency, and is feather (feather). The best alternative.

DRAWINGS

Fig. 1 is a digital microscope photograph (magnification of 100 times) of a processed yarn of a core-sheath structure of the present invention.

Figure 2 shows the sheath wire after unwinding, in which the white semicircular arc is the arc of the radius of the test ring.

Detailed ways

The filler of the present invention comprises staple fiber cotton formed of a core fiber and a sheath fiber, wherein the core fiber is composed of a low melting point fiber and a high melting point fiber, and the low melting point fiber is melted to fix the core fiber and the sheath fiber. The high-melting-point fibers and the low-melting-point fibers described in the present invention are not intended to mean fibers having a melting point above or below a specific value, but rather two fibers having a certain difference in melting point. Due to the difference in melting point between the core fibers, under the same heat treatment conditions, the low-melting fiber partially melts, which is partly caused by a part of itself melting, bonding, a part of the melting, and a part of the fusion bonding on the high-melting fiber. Dispersed fusion bonding points are formed in the short-fiber cotton. The presence of these fusion bonding points ensures that when the short-fiber cotton is used as a filling material, even if it is pressed by an external force, the core fiber and the sheath fiber are not dispersed, and the core sheath The structure is maintained and the space for storing still air is increased compared to long-fiber cotton, and the bulkiness is superior.

If the short-fiber cotton is too long, it can only be filled by hand, the filling efficiency is low, and the labor cost is relatively high. When the short-fiber cotton is too short, it is difficult to obtain a fluffy hand, and it is easy to cause a lint phenomenon, especially after washing. Offset and agglomeration have seriously affected the wearing of warmth. The length of the staple fiber of the present invention is determined by the core fiber. In order to achieve both the filling efficiency and the bulkiness, the average length of the core fiber of the staple fiber of the present invention is required to be 1 to 10 cm, preferably 2 to 10 cm, and more preferably 3 to 8 cm.

In view of the fact that the staple fiber cotton of the present invention is obtained by shearing, there is a certain deviation in the length between each of the staple fiber cottons, and the error of this length in the present invention is represented by the standard deviation of the length. The smaller the standard deviation of the length, the smaller the deviation of the length, and the greater the deviation of the length. The standard deviation of the length of the core fibers in the present invention is from 0 to 1.6, preferably from 0 to 1.0. The standard deviation is a measure of the extent to which a set of values is spread out from the average. A large standard deviation represents a large difference between most of the values and their average values; a smaller standard deviation means that these values are closer to the average. The formula for calculating the standard deviation is as follows:

μ is the average of X ₁ , X ₂ , X ₃ , ... Xn.

The larger the FP value, the better the fluffy effect of the object. The filler of the present invention has a FP value of 200 to 800 inch ³ / 30 g and has a good bulking effect. The FP value is preferably 400 to 800 inch ³ / 30 g.

In view of workability and obtaining an appropriate number of fusion bonding points, it is preferred in the present invention that the difference in melting point between the high melting point fiber and the low melting point fiber in the core fiber is from 30 ° C to 150 ° C. It is more preferable that the difference in melting point is from 30 ° C to 100 ° C, and more preferably from 50 ° C to 80 ° C from the viewpoint of hand feeling and resistance deviation.

In the present invention, the proportion of the low-melting fiber is preferably 0.2 to 30.0% by weight, and more preferably 0.2 to 10.0% by weight based on the total weight of the staple fiber. When the proportion of the low-melting fiber is more than 30.0% by weight, the fusion bonding point tends to increase, which may affect the bulkiness of the short-fiber cotton, resulting in hardening of the hand; and when it is less than 0.2% by weight, the fusion bonding The point has a tendency to decrease, especially when the core fiber is relatively short, the number of core sheath fibers that cannot be fixed together increases, which may affect the filling property and the washing offset.

In the present invention, it is preferred that the sheath fibers form an annular shape on the outer side of the core fiber, the radius of the ring is 2 to 12 mm, and the single fiber fineness of the sheath fiber is 3.5 to 10.0 dtex. The term "crossing" refers to the intersection (non-fixed point) formed by the intersection of the sheath fibers and the core fibers, and the mutual crossing means that a plurality of fibers having different directions pass through each other. But the intersection is not melted together and can move freely. When the radius of the ring formed by the sheath fiber is less than 2 mm, the sheath fiber is almost in close contact with the core fiber, and the three-dimensional space (air layer) between the core sheath fibers is small, and the bulkiness and heat retention of the short fiber cotton tend to decrease. . On the other hand, if the radius of the ring formed by the sheath fiber is larger than 12 mm, although the bulkiness and flexibility of the short fiber cotton are greatly improved, the compression resistance tends to be deteriorated, that is, it is formed when pressed by an external force. Permanent deformation may affect the appearance of the final product. The radius of the ring is more preferably 4 to 9 mm. At the same time, if the monofilament fineness of the sheath fiber is less than 3.5 dtex, although the softness of the fiber increases, the compression resistance of the ring formed by the sheath fiber may decrease; on the contrary, if the monofilament fineness of the sheath fiber exceeds 10.0 dtex. The rigidity of the fiber becomes high, and the hand of the short fiber cotton tends to be deteriorated. The monofilament fineness of the sheath fiber is more preferably 4.0 to 8.0 dtex.

There is a certain correlation between the number of intersections and the number of rings formed by the sheath fibers. When the number of intersections formed by the sheath fiber and the core fiber is small, it indicates that the number of rings formed by the sheath fiber is small, so that the bulkiness of the short fiber cotton is relatively low; otherwise, the intersection of the sheath fiber and the core fiber is formed. If the number is large, the number of rings formed by the sheath fibers is large. Although the bulkiness of the short fiber cotton is increased within a certain range, the three-dimensional space between the sheath fibers and the core fibers is not increased, but the short fiber cotton is caused. The weight per unit length increases, resulting in a decrease in bulkiness. The number of intersections formed by the sheath fibers and the core fibers in the present invention is preferably 30 to 150 / cm, more preferably 30 to 80 / cm.

In the filler of the present invention, the sheath fiber and the core fiber may each have a solid cross section, or may have a hollow cross section, or one of them may be solid and the other may be hollow. There is no particular limitation on the shape of the solid section, and it may be a circle, a triangle, a cross, an eight-leaf or the like. Compared with the solid fiber, the density of the hollow fiber is small. Under the same short fiber cotton form and gram weight, the length of the short fiber cotton made of the hollow fiber is longer, which is more favorable for improving the bulkiness of the short fiber cotton. However, the higher the degree of hollowness, the higher the requirements for the production process and the lower the productivity. In the present invention, it is preferred that both the sheath fiber and the core fiber are hollow fibers having a hollowness of 20% to 50% and a hollowness of more preferably 25% to 40%.

The filler of the present invention may be a short fiber cotton of a core-sheath structure or a mixture of short fiber cotton of a core-sheath structure and feathers. Adding feathers can further improve the fluffiness.

In the present invention, it is preferred that the staple fiber cotton used includes a sheath fiber having a radius of curvature of 5 to 20 mm, which can further improve the bulkiness of the staple fiber. The radius of curvature here is the radius of the three-dimensional spiral of the sheath fiber after unwinding. If the radius of curvature of the sheath fiber is less than 5 mm, the difficulty of opening the sheath fiber during processing becomes larger, the diameter of the ring formed by the sheath becomes smaller, and the bulkiness of the processed yarn decreases. Conversely, the radius of curvature of the sheath fiber is greater than 20 mm. If the diameter of the ring formed by the sheath fiber is relatively large, it may weaken or fail to reflect the original three-dimensional effect of the sheath fiber.

The type of the sheath fiber used in the present invention is not particularly limited, and may be one or more of ordinary polyester (PET), modified PET, polyolefin, and polybutylene terephthalate (PBT). The high melting point fiber in the core fiber may be one or more of ordinary PET, modified PET, polyolefin, PBT, etc.; the low melting point fiber may be in low melting point PET, polypropylene (PP), polyethylene or nylon fiber. At least one.

The staple fiber cotton of the present invention can be prepared by the following method, but is not limited to the method: feeding the sheath fiber and the high and low melting core fiber separately by using different feeding rollers or feeding rollers, by adjusting the feeding of the sheath fiber and the core fiber. Into the speed to control the silk length difference between the sheath fiber and the core fiber; the sheath fiber and the core fiber pass through the nozzle with the airflow, and then the core fiber and the sheath fiber form an entanglement with the chaotic airflow at the nozzle exit to obtain the processed wire. . The length of the sheath fiber is 5 to 50 times the length of the core fiber, depending on the sheath fiber and the core fiber. The air flow rate at the nozzle is set between 30 L/min and 150 L/min. The chaotic airflow refers to a flow of compressed air that becomes chaotic and periodically changes from a single flow due to interference of the sheath fibers and the core fibers. The sheath fibers are opened with a chaotic gas flow, and periodically intersect with the core fibers, and then subjected to high-temperature setting at 150 to 170 ° C to melt the low-melting fibers to obtain processed yarns. The obtained processed yarn was cut into a desired length as needed to obtain the staple fiber cotton of the present invention, which was then filled with a feather filling machine.

When the sheath fibers and the core fibers are fed, the filament length difference can be formed by adjusting the respective feeding speeds. Although the length of the sheath fiber does not have much influence on the filling efficiency, if the length ratio (length difference) between the sheath fiber and the core fiber is too small, the sheath fiber will have less coating on the core fiber. If it is a filler, the bulkiness of the fluffy body tends to decrease. When the length ratio (length difference) is too large, the sheath fibers tend to form a ring outside the core fiber, and the texture tends to become hard. From the viewpoint of the hand feeling and the fluffy effect, it is preferred that the sheath fibers are fed at a rate of 10 to 40 times, more preferably 10 to 30 times, the core fibers.

In order to further improve the softness of the staple fiber cotton, a layer of a silicon-based resin may be attached to the surface. The amount of adhesion of the silicone resin varies depending on the surface area of the sheath fiber and the core fiber, and the amount of the resin adhered is preferably from 0.1% by weight to 5.0% by weight.

The filling material of the invention has high bulkiness and soft hand feeling, and the heat-insulating products such as jackets, pants, vests, jumpsuits, jackets, quilts, pillows, sleeping bags, underwear, pajamas, sweaters, tight pants, socks or sportswear have No leakage, no velvet and so on.

The present invention will be further illustrated by the following examples and comparative examples, but the invention is not limited thereto.

The test methods of each parameter involved in the present invention are as follows:

(1) Average length of core fiber

10 processing yarns were taken from short-fiber cotton, short-fiber cotton was mounted on the measuring platform, and the weight of the 1/10/D denier weight (g) of the processed yarn was hoisted, and the length of the short-fiber cotton was measured and averaged. The value is the length of the core fiber of the present invention.

(2) the difference in melting point of the core fiber

The core fiber was separated from the staple fiber cotton and measured by a DSC differential scanning calorimeter to calculate the difference in melting point.

(3) Ring radius formed by sheath fibers

Take 5 short staple fiber cottons with a length of about 1 cm and fix them at both ends. The middle part is in a free state, and is magnified to a magnification of 50 times under a light microscope to take a picture, and then according to the three points on the ring formed by the sheath fibers. To draw the radius of the circle, the three rings were taken to observe the recorded values, and a total of 15 sets of data were measured to calculate the average value as the radius of the ring formed by the sheath fibers of the present invention.

(4) Number of intersections of sheath fibers and core fibers

Take 5 short staple fiber cottons with a length of about 1 cm and fix them at both ends. The middle part is in a free state, and is magnified to a magnification of 20 times under a light microscope to take a picture, and then according to the photo, the sheath monofilament fiber and the core fiber are formed. The intersection is counted, if the intersection of the multiple sheath fibers and the core fibers is at the same position, counted in one intersection, in units of /cm. Five sets of data were measured as described above to calculate an average value as the number of intersections of sheath fibers and core fibers.

(5) Hollowness

First, the unmelted core fiber and the sheath fiber in the short fiber cotton are separated, and then the separated core fiber and sheath fiber are respectively cut into thin slices (ie, fiber cross section) in the longitudinal direction, and magnified 1000 times under an optical microscope. The magnification is taken, and the area S1 of the hollow portion and the area S2 of the entire fiber (including the hollow portion) are calculated from the photograph, and then calculated:

Hollow ratio = (S1/S2) × 100%.

(6) radius of curvature

Prepare a sample of sheath fiber precursor about 30cm long, and place it in a constant temperature and humidity environment (20 °C × 65% RH) for 8 hours or more to stabilize its state, then select the curved part (visual) to enlarge under a digital microscope. Radius measurement is performed at a magnification of 20 times, and three points are randomly selected on the curved portion. Click the function key of the radius of the digital microscope to obtain the radius, and take 20 bending portions to measure and calculate the average value as the radius of curvature.

(7) Total denier and monofilament fineness

The total fineness was measured according to the JIS L 1013:2010 standard; the monofilament fineness was calculated by the total fineness and the number of filaments.

(8) Bulkness (FP value)

Tested according to the method specified by IDFB (International Down & Feather Bureau):

1 Firstly, the sample to be tested is placed in an environment of 20 ° C × 65% RH for 8 hours or more, so that the sample to be tested is stable;

2 Weigh the sample 30g, shake it to the fluffy state manually, put it into the measuring barrel and cover it;

3 Move the weight plate down to the highest point of contact with the sample, then release the weight plate to make it fall freely, release the weight plate while timing, stabilize the height for 1 minute and record;

4 Open the cover and take out the sample, shake it again to the fluffy state, put it into the measuring barrel (inner diameter d=28.8cm), cover it, and measure again according to step 3, test 5 times in the same way; 5 calculate the average of 5 times After the height H, the fluff is calculated according to the following formula:

FP=V/16.39=πd ² H/(16.39×4)=39.73H (unit: in ³ /30g)

Wherein 1in ³ = 16.39cm ³ .

(9) feel

About 30 g of the filler was taken, and 10 people were asked to evaluate the touch by hand. The evaluation results are as follows:

◎ I don’t feel any melting point at all, it’s very smooth and soft, I think it feels very good.

○ Basically, there is no melting point, it is smooth and soft, and it feels good.

△ It is obvious that there is a melting point, the melting point is hard, not soft, and the hand feels normal.

×I feel that melting occurs in many places, it is very hard, and I feel that it feels bad.

If more than 5 out of 10 people are considered to be at the same level, it is judged to be the level. If there is a level of judgement less than or equal to 5 people, then consider looking for another 10 people to rate.

(10) Offset rate after washing

The greater the wash offset rate, the worse the feel of the sample. The specific evaluation methods are as follows: 1 Prepare the fabric 4 pieces of length 72cm* width 52cm, each of which is quilted into a plurality of strips of 52cm long * 5cm wide, and fill the filling with feather filling machine in each strip shape. And fixing the two ends to each other to obtain a filler;

2 The filling body is washed according to the JIS L-0217 standard, cut along any tangential line on the filling body, photographed, and the fiber-containing portion and the fiber-free portion in the strip on the photo are respectively weighed, The part of the fiber is denoted as W1, and the part without fiber is denoted as W2;

3 Calculate, the offset ratio in the width direction after the filling is washed = W2 / (W1 + W2) * 100%. The present invention will be further described below in conjunction with the examples and comparative examples, but the present invention is not limited to the following.

(11) Feather filling machine filling efficiency

Taking the strip shape 45cm*5cm of the ordinary down jacket as an example, the feather filling machine is used for filling, and the filling efficiency is evaluated as follows:

If the time required to fill a cell is less than 2 seconds, the filling efficiency is considered to be high ○;

If the time required to fill a cell is 2 to 10 seconds, the filling efficiency is considered to be generally Δ;

If it takes more than 10 seconds to fill a cell, it is considered that the filling efficiency is low ×.

Example 1

42dtex-6f-PET with a hollowness of 30% and a crimp radius of 20mm was selected as the sheath fiber raw material, and 42dtex-12f-PET (melting point 220°C) and 56dtex-48f-PP DTY (melting point 170°C) with a hollowness of 20% were selected. As the core fiber raw material, and fed separately by different feeding rollers, wherein the core fiber is composed of two high and low melting points with a melting point difference of 50 ° C, the feeding speed is 20 m / min, and the radius of curvature of the sheath fiber is 20 mm. The feeding speed was 400 m/min, and the proportion of the low melting point fibers in the core fiber was 10.0% by weight. The flow rate of the air in the nozzle was set to 70 L/min, and the air pressure of the nozzle was 0.35 MPa. The sheath wire and the core wire were formed into a processed tow through an air nozzle, and then the obtained processed tow was preheated by passing through a 170 ° C hot box. Then, it is padded by a silicon-based aqueous solution prepared by a silicon-based smoothing agent, and then fixed by a hot box to obtain a fluffy processed wire having a ring radius of 5.0 mm and a number of intersections of 50/cm, and then the resulting fluffy yarn is obtained. The processed yarn was cut into short fiber cotton having an average length (i.e., an average length of the core fibers) of 2 cm and a standard deviation of 0.2 in length, and the filler of the present invention was obtained. The specific parameters are shown in Table 1.

Example 2

The obtained fluffy processed yarn was cut into short fiber cotton having an average length of 4 cm and a standard deviation of 0.3, and the remainder was the same as in Example 1 to obtain a filler of the present invention, and the parameters thereof are shown in Table 1.

Example 3

The obtained fluffy processed yarn was cut into staple fiber cotton having an average length of 8 cm and a standard deviation of 0.3, and the remainder of the same manner as in Example 1 was obtained. The fillers of the present invention were obtained, and the parameters thereof are shown in Table 1.

Example 4

56dtex-48f-PP DTY (melting point 170 ° C) as a core fiber raw material was replaced with 56dtex-48f-PP DTY (melting point 140 ° C), and the fluffy processed yarn was obtained and cut into staple fiber cotton with a standard deviation of 0.1. The rest of the same as in Example 2, the filler of the present invention was obtained, and the parameters thereof are shown in Table 1.

Example 5

56dtex-48f-PP DTY (melting point 170 ° C) as a core fiber raw material was replaced by 56dtex-48f-PET DTY (melting point 200 ° C), and the fluffy processed yarn was obtained and cut into staple fiber cotton with a standard deviation of 0.5. The rest of the same as in Example 2, the filler of the present invention was obtained, and the parameters thereof are shown in Table 1.

Example 6

The proportion of the low-melting fiber in the core fiber is adjusted to 0.2% by weight, and the fluffy processed yarn is obtained and then cut into short-fiber cotton having a standard deviation of 0.6, and the remainder is the same as in Example 2, and the filler of the present invention is obtained. The parameters are shown in Table 1.

Example 7

The proportion of the low-melting fiber in the core fiber is adjusted to 0.1% by weight, and the fluffy processed yarn is obtained and then cut into short-fiber cotton having a standard deviation of 0.8. The remainder of the same embodiment 2 is obtained, and the filler of the present invention is obtained. The parameters are shown in Table 1.

Example 8

The sheath fiber raw material was replaced with a PET fiber having a single-filament fineness of 2.5 dtex, and the fluffy processed yarn was obtained, which was then cut into staple fiber cotton having a standard deviation of 1.0. The remainder of the same manner as in Example 2, the filler of the present invention was obtained. The parameters are shown in Table 1.

Example 9

The sheath fiber raw material was replaced with a PET fiber having a single-filament fineness of 4.0 dtex, and the fluffy processed yarn was obtained and cut into short-fiber cotton having a standard deviation of 0.4. The remainder of the same manner as in Example 2, the filler of the present invention was obtained. The parameters are shown in Table 1.

Example 10

The sheath fiber material was replaced with a PET fiber having a monofilament fineness of 10.0 dtex, and the fluffy processed yarn was obtained and cut into short fiber cotton having a length standard deviation of 0.3. The rest of the same as in Example 2, the filler of the present invention was obtained, and the parameters thereof were obtained. See Table 1.

Example 11

The pressure adjustment of the nozzle is 0.20 MPa, and the radius of the ring of the sheath fiber is 1.0 cm in the obtained fluffy processed yarn, and the fluffy processed yarn is obtained and cut into short fiber cotton with a standard deviation of 0.1. The rest is the same as in the second embodiment. The filler of the present invention was obtained, and its various parameters are shown in Table 2.

Example 12

The pressure of the nozzle was adjusted to 0.40 MPa, and a fluffy processed yarn having a ring radius of 2.0 cm of the sheath fiber was obtained, which was then cut into short fiber cotton having a standard deviation of 0.2, and the rest was the same as in Example 11 to obtain the filling of the present invention. The parameters of the substance are shown in Table 2.

Example 13

The pressure reduction of the nozzle was adjusted to 0.30 MPa, and a fluffy processed yarn having a ring radius of 8.0 cm of the sheath fiber was obtained, which was then cut into short fiber cotton having a standard deviation of 0.5, and the same as in Example 2, the filling of the present invention was obtained. The parameters of the substance are shown in Table 2.

Example 14

The raw materials of the sheath fiber and the core fiber are replaced with non-hollow PET fibers, and the fluffy processed yarn is obtained and then cut into short fiber cotton having a standard deviation of 0.5, and the rest is the same as in Example 2, and the filler of the present invention is obtained. The item parameters are shown in Table 2.

Example 15

When processing, the feeding speed of the core fiber is 20 m/min, the feeding speed of the sheath fiber is 300 m/min, and the fluffy processed yarn having the number of intersections of the sheath fiber and the core fiber of 38/cm is obtained, and then the scissors are cut. The staple fiber cotton having a length standard deviation of 0.6 was cut, and the remainder was the same as in Example 2, and the filler of the present invention was obtained, and the parameters thereof are shown in Table 2.

Example 16

When processing, the feeding speed of the core fiber is 20 m/min, the feeding speed of the sheath fiber is 200 m/min, and the fluffy processed wire having the number of intersections of the sheath fiber and the core fiber of 25/cm is obtained, and then the scissors are cut. The staple fiber cotton having a length standard deviation of 0.6 was cut, and the remainder was the same as in Example 2, and the filler of the present invention was obtained, and the parameters thereof are shown in Table 2.

Example 17

The sheath fiber used had a radius of curvature of 50 mm, and was obtained by shearing the fluffed yarn into a short-fiber cotton having a standard deviation of 0.3. The remainder of the same manner as in Example 2, the filler of the present invention was obtained, and the parameters thereof are shown in Table 2.

Example 18

The feathers were mixed with the staple fiber cotton at a mixing ratio of 50:50, and the remainder was the same as in Example 2 to obtain the filler of the present invention, and the parameters thereof are shown in Table 2.

Comparative example 1

After the fluffy processed yarn was obtained, it was cut into staple fiber cotton having an average length of 11 cm and a standard deviation of 0.5. The remainder was the same as in Example 3, and the filler was obtained. The parameters are shown in Table 2.

Comparative example 2

After the fluffy processed yarn was obtained, it was cut into staple fiber cotton having a standard deviation of 2.0, and the rest was obtained in the same manner as in Example 3, and the parameters thereof are shown in Table 2.

According to the above Table 1, Table 2,

(1) As compared with Example 4, in Example 2, it was found that under the same conditions, the filler formed of the core fiber having a difference in melting point of 50 ° C was compared with the filler formed of the core fiber having a difference in melting point of 80 ° C. The bulkiness of the person and the filling efficiency of the down filling machine are all comparable, but the former feels better than the latter.

(2) As compared with Example 5, in Example 2, it was found that under the same conditions, the filler formed of the core fiber having a difference in melting point of 50 ° C was compared with the filler formed of the core fiber having a difference in melting point of 20 ° C. The filling efficiency of the down filling machine is equivalent, but the former has better bulkiness, feel and washing resistance than the latter.

(3) It can be seen from Example 6 that, under the same conditions, a filler formed of a core fiber having a low melting point fiber ratio of 0.2% by weight and a core fiber having a low melting point fiber content of 0.1% by weight. Compared with the formed filling, the filling efficiency and the hand feeling of the down filling machine are both comparable, but the former has better washing resistance than the latter.

(4) In comparison with Example 10, it can be seen that, under the same conditions, the filler formed of the sheath fiber having a single-filament fineness of 7.0 dtex and the filler formed by the sheath fiber having a single-filament fineness of 10.0 dtex are both The filling efficiency of the down filling machine is equivalent, but the former has better bulkiness, washing anti-offset and feel than the latter.

(5) Comparing Example 2 with Example 11, it can be seen that under the same conditions, the filler having a sheath fiber ring radius of 5.0 mm and the sheath fiber ring having a radius of 1.0 mm have a lower filling filling. The filling efficiency and feel of the machine are comparable, and the former's bulkiness and washing resistance are better than the latter.

(6) It can be seen from the comparison between Example 2 and Example 14 that under the same conditions, the filling efficiency of the both of the fillings formed of the non-hollow fibers as the raw material and the filler formed of the hollow fibers as the raw materials And the washing resistance is equal to the offset, but the former has better bulk and feel than the latter.

(7) Comparing Example 2 with Example 16, it can be seen that, under the same conditions, the filler having a core-sheath fiber intersection of 50/cm and the core-sheath fiber having a cross-section of 25/cm are compared. The down filling machine has the same filling efficiency, washing anti-offset and feel, but the former has better bulk than the latter.

(8) It can be seen from Comparative Example 1 and Example 3 that, under the same conditions, the filling of the core fiber having an average length of 11 cm is smaller than the filling of the core fiber having an average length of 8 cm. The anti-offset and feel of the washing are not as good as the latter, and the filling efficiency of the down filling machine is particularly poor.

(9) From Comparative Example 2 and Example 3, it was found that, under the same conditions, the filler formed of the core fiber having an average length standard deviation of 0.3 was compared with the filler formed of the core fiber having an average length standard deviation of 2.0. The fluffiness of the two, the filling efficiency of the down filling machine and the feel are quite the same, but the filling efficiency of the former's down filling machine is relatively poor.

Claims

A filler comprising a staple fiber cotton formed of a core fiber and a sheath fiber, wherein the core fiber is composed of a low melting point fiber and a high melting point fiber, and the low melting point fiber is melted to fix the core fiber and the sheath fiber, wherein The core fiber has an average length of 1 to 10 cm, a standard deviation of length of 0 to 1.6, and a bulkiness of the staple fiber cotton of 200 to 800 inch 3 / 30 g.
The filler according to claim 1, wherein said low melting point fiber and said high melting point fiber have a melting point difference of from 30 to 150 °C.
The filler according to claim 1 or 2, wherein the proportion of the low melting point fibers is from 0.2 to 30.0% by weight based on the total weight of the staple fiber.
The filler according to claim 1 or 2, wherein the core fiber and the sheath fiber intersect and the sheath fiber forms an annular shape on the outer side of the core fiber, and the radius of the ring is 2 to 12 mm, and the single fiber fineness of the sheath fiber It is 3.5 to 10.0 dtex.
The filler according to claim 4, wherein the number of intersections between the sheath fibers and the core fibers is 30 to 150 / cm.
The filler according to claim 1 or 2, wherein the sheath fibers and the core fibers are hollow fibers, wherein the space is from 20% to 50%.
The filler of claim 1 wherein said filler further comprises feathers.
A jacket, pants, vest, coveralls, jacket, quilt, pillow, sleeping bag, underwear, pajamas, sweater, leggings, socks or sportswear containing the filler of claim 1.