WO2023134164A1 - Insulating wadding and application thereof - Google Patents

Abstract

Insulating wadding and an application thereof. The insulating wadding comprises two or more layers of non-woven fiber webs and a filler material; the filler material is distributed between the non-woven fiber webs, and the filler material is made up only of non-low melting point fibers. The present invention can effectively reduce the percentage of fibers melting and adhering, greatly increases compression resilience, softness, and fluffiness of insulating wadding, and is particularly suitable for manufacturing clothing, bedding, outdoor products, bags and cases, decorative materials, etc.

Description

Insulation wadding and its application technical field

The invention relates to a thermal insulation floc and its application.

Background technique

With the continuous improvement of living standards, people's expectations for thermal clothing are also getting higher and higher. In order to obtain excellent thermal insulation and wearing effects, people have made a lot of explorations and efforts on thermal insulation flocs in thermal insulation clothing. For example, the Chinese patent document CN108474155A discloses heat-insulating wadding material and its preparation method and heat-insulating products. Distributed between a part of adjacent monofilament webs, at least a part of the fibers constituting the monofilament webs are low-melting fibers, and at least a part of the fibers constituting the spherical fiber assembly are low-melting fibers, having excellent compression resilience And (insulation) washing durability and other characteristics. However, since both the spherical fiber aggregates and the single fiber web sheet contain low-melting-point fibers, the bonding between the fibers formed after heat treatment makes the flake material feel hard and have insufficient bulkiness.

As another example, the Japanese Patent Document Patent No. 6669755 discloses fiber ball filling materials and products containing fiber ball filling materials, and specifically discloses that the filling materials include non-woven fiber webs and fiber balls. Composition of a mixture, the fiber mixture includes 40-95% by weight of synthetic fibers and 5-40% by weight of binder fibers, the bonding temperature of the binder fibers is lower than the softening temperature of the synthetic fibers, the thus formed filling material has softness, shape However, since the fiber mixture that constitutes the nonwoven fiber web and fiber balls contains binder fibers, the binder fibers are melted and bonded after heat treatment, which affects the bulkiness of the product as a whole.

For another example, the Chinese patent document CN106906571A discloses an elastic air-permeable structure composed of multi-fiber layers and its application. Both the net layer and the fiber ball layer are made of short fibers, and the short fibers are low-melting short fibers and three-dimensional crimped hollow short fibers, which have the characteristics of light weight, softness, good air permeability, and good shape retention after compression, but they also have fluffy In addition, the low-melting-point fiber in the fiber ball layer suppresses the curling state of the hollow short fiber after melting, and the overall compression resilience is affected.

Contents of the invention

The purpose of the present invention is to provide a thermal insulation flake with softer and fluffier hand feeling and superior compression resilience.

Another object of the present invention is to provide the application of thermal insulation wadding.

Technical solution of the present invention is:

In order to achieve the above object, the constitution of the present invention is as follows:

(1) Thermal insulation wadding, which includes more than two layers of non-woven fiber webs and fillers, the fillers are distributed between the non-woven fiber webs, and the fillers are only composed of non-low melting point fibers.

(2) The thermal insulation batt of the above (1), wherein the nonwoven fiber web and the filler are fixed together by fixed points, and the distance between any adjacent fixed points is more than 4mm.

(3) The thermal insulation batt of (1) or (2) above, wherein on the side of the nonwoven fiber web in contact with the filler, the number of fibers with a length of 10 mm or more per 1 cm ² area is 1 or more.

(4) For the thermal insulation flakes of (3) above, the grammage of the nonwoven fiber web is 8-25 g/㎡.

(5) The thermal insulation batt of (3) above, wherein the nonwoven fiber web is composed of low-melting fiber and non-low-melting fiber, and the melting point of the low-melting fiber is 140° C. or lower.

(6) For the insulation wadding of the above (5), the low-melting fiber is polyester fiber, polyamide fiber, polyethylene fiber, polypropylene fiber, polyethylene/polypropylene two-component composite fiber, polyester/polyethylene two-component One or more of composite fibers and polyester/polypropylene bicomponent composite fibers.

(7) In the thermal insulation wadding sheet of (5) above, the non-low-melting fiber is one or more of polyester fiber, polyamide fiber and regenerated cellulose fiber.

(8) The thermal insulation flakes of (3) above, wherein the filler is fiber balls.

(9) The thermal insulation wadding of the above (3), wherein the filler is opened cotton.

(10) The thermal insulation wadding sheet of (3) above, wherein the thermal insulation wadding sheet is formed by quilting to form fixed points and fix the nonwoven fiber web and filler together.

(11) The thermal insulation wadding sheet of (3) above, wherein the thermal insulation wadding sheet forms fixed points by hot pressing and fixes the nonwoven fiber web and filler together.

(12) The thermal insulation wadding sheet of (3) above, wherein the thermal insulation wadding sheet forms fixing points by an adhesive attachment method and fixes the nonwoven fiber web and the filler together.

(13) Application of the thermal insulation flakes of the above (1) to (12) in clothing, bedding, outdoor products, bags, and decorative materials.

The thermal insulation wadding of the present invention includes more than two layers of non-woven fiber webs and fillers, the fillers are distributed between the non-woven fiber webs, and the fillers are only composed of non-low-melting fibers, which can effectively reduce the ratio of fiber fusion bonding , greatly improving the compression resilience, softness and bulkiness of the thermal insulation wadding, especially suitable for making clothing, bedding (such as quilts, mattresses, blankets, etc.), outdoor products (such as tents, etc.), bags and decorative materials ( Such as thermal insulation materials, sound insulation materials, etc.).

Description of drawings

Fig. 1 is a schematic structural view of the thermal insulation wadding sheet by the linear quilting method of the present invention. Among them, 1 and 2 are nonwoven fiber webs, 3 is filler, 4 is fixed point, 5 is exposed fiber on the contacting side of nonwoven fiber web and filler, and 6 is the distance between adjacent fixed points.

Fig. 2 is a schematic diagram of the structure of the heat preservation wadding sheet by the ultrasonic hot pressing method of the present invention. Among them, 1 and 2 are nonwoven fiber webs, 3 is filler, 4 is fixed point, 5 is exposed fiber on the contacting side of nonwoven fiber web and filler, and 7 is the distance between adjacent fixed points.

Detailed ways

The placement of the nonwoven web, the distribution of the filler, and the composition of the filler are all critical to the insulating batting of the present invention. First of all, if the non-woven fiber web is not set, the filler will obviously shift, agglomerate, entangle and other problems during the washing process. Therefore, the setting of the non-woven fiber web is very necessary. The number of layers of the non-woven fiber web is not particularly limited, but at least two layers are required. In this case, the filling is distributed between the two layers of non-woven fiber web, which can solve the problem that the filling is easy to shift without affecting the flakes. Improved thermal insulation. Secondly, if the filler contains low-melting-point fibers, the low-melting-point fibers will be melted and bonded after heat treatment, and will stick together with other surrounding fibers to form bonding points, resulting in a reduction in the degree of freedom of the fibers that make up the filler, which in turn affects the thermal insulation batt. Therefore, in the present invention, it is required that the filler is only composed of non-low melting point fibers.

As a preference, the non-woven fiber web of the thermal insulation flakes and the filler are fixed together through a fixed point, which is considering that after the non-woven fiber web and the filler are partially fixed, the free offset space of the filler in the thermal insulation flake becomes smaller, Washing misalignment can be further improved. If the distance between any adjacent fixed points is less than 4mm, although the free offset space of the filling is small enough, the bulkiness and feel of the insulation batt tend to decline.

Preferably, on the side of the nonwoven web in contact with the filler in the present invention, the number of fibers with a length of 10 mm or more per 1 cm ² area is 1 or more. This is because the fibers of 10 mm or more on one side of the non-woven fiber web in contact with the filler can effectively entangle with the fibers on the surface of the filler to suppress the displacement of the filler. More preferably, the number of fibers with a length of 10 mm or more per area of 1 cm ² is 5 or more on the side of the nonwoven fiber web in contact with the filler. More preferably, the number of fibers with a length of 10 mm or more per 1 cm ² area on the side of the nonwoven fiber web in contact with the filler is 5 to 15.

Here, the fiber having a length of 10 mm or more preferably has a crimped structure. The greater the crimp rate of fibers, the better the cohesion between fibers. In the present invention, fibers with a length of more than 10 mm having a crimped structure can be well entangled with the fibers exposed on the surface of the filler to prevent the slipping and agglomeration of the filler, and fibers with a crimped structure can effectively improve the nonwoven fiber web. fluffiness.

The method of forming the crimped structure is not particularly limited, and can be obtained by any of the following methods: (1) using the thermoplastic characteristics of the fiber, the tow with a certain tension and temperature is continuously sent into the crimping box by the crimping roller, Pressurize to obtain filaments with crimped structure, then cut to obtain short fibers, preferably the number of crimps is 3 to 18/25mm, and the crimp rate is 3% to 14%; Holes and rapid cooling are used for spinning, and the internal stress formed in the fiber is retained in the fiber and converted into asymmetric tension of the fiber, so that each single fiber forms an obvious helical crimp structure, which is drawn after subsequent stretching The shaping process obtains three-dimensional crimped hollow fibers, preferably the number of crimps is 3-18/25mm, and the crimp rate is 5-15%; (3) The polymers of different components are sprayed through the same spinneret hole to form a single fiber , due to the different shrinkage rates of each component fiber, the single fiber after relaxation shows a high degree of fluff and crimp, thereby obtaining a fiber with a three-dimensional helical crimp structure, preferably the number of crimps is 3 to 20/25mm, and the crimp rate 6-18%.

Preferably, the nonwoven fiber web has a grammage of 8-25 g/㎡. When the weight of the non-woven fiber web is less than 8g/㎡, the non-woven fiber web is thinner, the strength is lower, the cohesion between the fiber on the filler and the filler is smaller, and the washing durability of the insulation batt tends to decline. ; When the grammage of the non-woven fiber web is greater than 25g/㎡, the amount of filler in the same grammage of insulation flake products is relatively reduced, and the softness and bulkiness of the insulation flake tend to decline.

Preferably, the fibers forming the nonwoven web are low-melting fibers and non-low-melting fibers, wherein the melting point of the low-melting fibers is below 140°C. Preferably, the melting point of the low-melting fiber is 110°C to 140°C, which is based on the consideration that if the melting point of the low-melting fiber is higher than 140°C, the hot air process consumes more energy; and if the melting point of the low-melting fiber is lower than 110°C , may affect the stability of production. Non-low-melting fiber refers to other fibers except fibers with a melting point below 140°C, that is, all fibers except low-melting fibers.

Preferably, the content of the low-melting fiber in the nonwoven fiber web is 10-50% by weight. This is considering that under the same conditions, if the content of low-melting fiber is less than 10% by weight, there will be fewer fusion bonding points after heat treatment, and the bonding fastness between the nonwoven fiber web and the filler will be affected, and the washing durability will be reduced. There is a downward trend; if the content of low-melting fiber is greater than 50% by weight, there will be more fusion bonding points after heat treatment, and the hand feeling of the insulation flakes will tend to become hard.

In the present invention, the type of the low-melting fiber is not particularly limited, and may be a single-component fiber or a bi-component composite fiber or the like. The low-melting fiber can be a fiber with a crimped structure, or a conventional fiber without a crimped structure, and its raw material is preferably polyester fiber, polyamide fiber, polyethylene fiber, polypropylene fiber, polyethylene/polypropylene bicomponent One or more of composite fibers, polyester/polyethylene bicomponent composite fibers and polyester/polypropylene bicomponent composite fibers. The low-melting-point polyester fiber and low-melting-point polyamide fiber here are modified by adding a third component during the polymerization reaction. Considering that the polyester/polyethylene bicomponent composite fiber can be thermally bonded under relatively low heating conditions and has little effect on the hand feeling of the nonwoven fiber web, it is more preferred.

Considering that the fineness of the low-melting fiber is too low, the breaking strength of the nonwoven web tends to decrease; and if the fineness of the low-melting fiber is too high, the bonding points in the unit area of the nonwoven web after heat treatment tend to decrease. Therefore, it is preferable that the fineness of the low melting point fiber is 1.0 to 3.0 denier (D). In addition, considering the effect of carding, in the present invention, the length of the low-melting fiber is preferably 32-64 mm, more preferably 38-51 mm.

In the present invention, the type of non-low-melting fiber is not particularly limited, and it is preferably one or more of polyester fiber, polyamide fiber and regenerated cellulose fiber. The polyester fiber here is preferably a three-dimensional crimped hollow polyester fiber. Considering that the higher the content of the three-dimensional crimped hollow polyester fiber, the better the bulkiness and compression resilience of the nonwoven web, the content of the three-dimensional crimped hollow polyester fiber is preferably 20-70% by weight. The regenerated cellulose fibers here are not particularly limited, and examples thereof include viscose, modal, and bamboo fibers.

In the present invention, the filler is preferably fiber balls. The fiber balls here can be obtained by known techniques, and can also be produced by oneself. It is preferably composed of two or more fibers with different numbers of crimps and crimp rates. Through the difference in crimp between fibers, not only can the fiber ball have a softer feel and more excellent bulkiness, but also the fiber ball can have More excellent compression resilience, to achieve the purpose of machine washable. In the present invention, the fiber ball preferably has a bulkiness of 300 to 600 inch ³ /30g.

In the present invention, the filler is preferably opened cotton. Opened cotton specifically refers to smaller fiber blocks or fiber bundles obtained after opening and decomposing larger raw cotton on the opener. Opening the cotton reduces the weight per unit volume of the fiber raw material, making the filler more bulky, and there are more loose fibers on the surface of the fiber raw material in the open state, which is easier to entangle with the exposed fibers on the nonwoven fiber web At the same time, it can effectively prevent the occurrence of the offset and agglomeration of the filler. In addition, the production process of the opened cotton is relatively short and the cost is relatively low. In the present invention, the bulkiness of the opened cotton is preferably 400 to 800 inch ³ /30g.

Preferably, the insulation batt of the present invention forms fixing points by quilting and fixes the nonwoven fiber web and filler together. The quilting method generally uses a multi-needle quilting machine, which is not only simple and convenient to operate, but also can ensure the bulkiness of the insulation flakes and other properties. In the present invention, if the distance between any adjacent fixed points is less than 4mm, that is, if the quilting stitches are too dense, the production efficiency of the thermal insulation wadding tends to decline, and may affect the feel of the thermal insulation wadding, while If the distance between any adjacent fixed points is greater than 20mm, there will be a large space for the filler to move, and there may be problems of uneven filling and large washing deviation of the filler. Therefore, when the fixed points are formed by the quilting method in the present invention, the distance between any adjacent fixed points is preferably 4-20 mm, more preferably 4-10 mm. In addition, in the present invention, there is no special limitation on the shape of the quilting stitches, which may be straight lines or curves in the length direction of the wadding, and may also be grids, circles or other irregular shapes. Of course the stitches can be continuous or non-continuous. When the quilting stitches are straight lines, if the spacing between two adjacent stitches is too narrow, the bulkiness of the insulation batting will tend to decrease; if the spacing is too wide, the effect of fixing the filling will decrease. trend. Therefore, preferably, the width between adjacent stitches in the present invention is 50-200 mm, more preferably 50-100 mm.

Preferably, the thermal insulation batts of the present invention form fixing points and fix the non-woven fiber web and filler together by hot pressing. The hot pressing method is preferably an ultrasonic hot pressing method, and its specific processing conditions are: air pressure 0.1-0.3MPa, current 0.4-0.8A, flower wheel pressure 1.5-3Kg, ultrasonic power 1400-1600W.

Preferably, the insulation batt of the present invention forms anchor points and fixes the nonwoven fiber web and filler together by adhesive attachment. Specifically, the adhesive attachment method may be to apply the adhesive to the nonwoven fiber web by means of roller coating, doctor blade coating, spraying, etc., and cool and solidify to form fixed points. The adhesive here is not particularly limited, and may be a polyvinyl acetate adhesive, an acrylic adhesive, or the like.

Compared with the quilting method, the production efficiency of the hot pressing method and the adhesive attachment method is higher, and the fixed point formed is relatively firm. When forming a fixed point by the hot pressing method or the adhesive attachment method in the present invention, preferably any phase The distance between adjacent fixed points is 50-200 mm, more preferably 50-100 mm.

In addition, in the present invention, the nonwoven fiber web and the filler can also be fixed together by means of needle punching or spunlace, which is not particularly limited and can be selected according to needs. The fiber raw materials of the nonwoven fiber web, filler and quilting may be the same or different, and are not particularly limited.

The manufacturing method of the thermal insulation flakes of the present invention is not particularly limited, and can be prepared by the following method: first prepare a number of nonwoven fiber webs and fillers, then feed the nonwoven fibrous webs 1 into the lower feeding port of the flake processing equipment, and then Lay fillers on it, then feed the nonwoven fiber web 2 at the upper feeding port, so that the fillers are distributed between the nonwoven fiber webs 1, 2, and finally the nonwoven fiber webs 1, 2 and the fillers are fixed on the Get the thermal insulation flakes of the present invention together. The nonwoven fiber web can be single-layer or multi-layer, which can be selected according to needs.

The present invention will be described in detail below in conjunction with examples and comparative examples.

The assay method of each parameter involved in the present invention is as follows:

(1) The distance between adjacent fixed points

Prepare a sample with a size of 50cm×50cm, and fix it on a horizontal table in a natural tension-free state. Select two adjacent fixed points arbitrarily on the sample, use the central point of the fixed point as the end point, measure the distance between the two ends with a ruler, measure 10 places in total to obtain 10 groups of data, and take the average value as the present invention. The distance between adjacent fixed points.

(2) Confirmation of the number of fibers with a length of 10 mm or more on the nonwoven web

a. Sampling

Gently disintegrate the nonwoven fiber web from the insulation batt under a tension-free state, and then cut out a nonwoven fiber web with a length of 1 cm x a width of 1 cm as a test sample.

b. Measurement preparation

The side of the test sample that is in contact with the filling is placed upwards, and the test sample is flatly pasted on a piece of black cardboard and fixed on a horizontal table.

c. to measure

Gently straighten the fibers exposed on the surface with tweezers, measure their length with a triangular ruler, and count the number of fibers with a length longer than 10 mm. When taking a reading, keep your eyes level with the jammed paper on the table.

d. Calculate

Repeat the above steps, measure 10 samples in total, and take the average value as the number of fibers with a length of 10 mm or more on the nonwoven web in the present invention.

(3) Fiber melting point

Decompose 2-3g of short fibers from the nonwoven fiber web or filler as the sample to be tested, and then use the differential scanning calorimeter DSC to test the sample, the initial temperature is 30°C, and the heating rate is 20°C/min.

The final temperature was 300°C. The temperature showing an extreme value (highest value) in the obtained melting endothermic curve was defined as the melting point of the fiber.

(4) Types of fiber raw materials

According to the first part of JIS L 1030-1:2012 standard: fiber identification. Specific examples are as follows: to identify whether the fiber raw material belongs to natural fiber or chemical fiber, refer to 6.1 combustion test method in this standard; to identify which kind of natural fiber or chemical fiber the fiber raw material belongs to, refer to 6.4 microscope test method and 6.8 infrared test method in this standard Absorption Spectroscopy Test Method.

(5) Washing offset rate of filler

a. Prepare a test sample of thermal insulation wadding with a size of 30cm×30cm and the standard white cotton cloth specified in the JIS L 0803:2011 standard. The warp direction is parallel, and quilting is carried out along the weft direction of the white cotton cloth. Each quilting line is 10cm apart, and two lines are quilted, and then the four sides are stitched to obtain a square cushion. Make a total of 3 cushions in the same way;

b. Take one of the cushions and wash them according to the washing procedures stipulated in ISO 6330:2012(E)4M, and select "A-dry on the rope" as the drying procedure after washing. The washed cushion was disassembled to obtain 3 test samples of the washed insulation wadding. Take one of them and place it flat on a transparent glass plate, irradiate it vertically under the glass plate with a D65 light source, take a picture above the test sample with an ordinary digital camera (the camera is parallel to the test sample), then print the photo, and manually draw on the photo The area with filling and the area without filling, cut out the area with filling and without filling, weigh them respectively and record them as W1 and W2. Calculate the washing offset rate according to the following formula: washing offset rate = W1/(W1+W2) × 100%;

c. Measure and calculate the washing offset rate of the insulation flakes in the remaining two cushions in the same way, and take the average value as the final result. The larger the value of the washing drift rate, the more the filling drifts and the worse the washing durability.

(6) heat preservation rate

Test according to GB/T 35762-2017 plate method. The larger the value of the heat preservation rate, the better the heat preservation.

(7) Gram weight

Gently decompose the non-woven fiber web from the insulation batt in a tension-free state, cut a non-woven fiber web with a size of 50cm×50cm as a sample, weigh it and record it as m, the gram weight of the sample (g/ ㎡)=m×4. Repeat the above steps to measure the gram weight of three samples, and take the average of the three results as the final result. The same method can test the gram weight of the insulation flakes.

(8) The bulkiness of the insulation flakes

Refer to the standard of FZ/T 64003-2011 (Appendix A) for testing.

(9) Compression recovery rate

Refer to the standard of FZ/T 64003-2011 (Appendix A) for testing.

(10) Feel

The sensory evaluation of the thermal insulation flakes was conducted by 10 people, and it was divided into 4 grades: excellent, good, average, and poor. Among them, if more than 8 people think the hand feeling is good, it is rated as excellent; if 6-7 people think the hand feeling is good, it is rated as good; when 3-5 people think the hand feeling is good, it is rated as fair;

(11) The bulkiness of fiber balls and open cotton

a. Decompose 30g of fiber balls (or open cotton) from the insulation wadding as a sample;

b. Use the IDFB bulkiness testing machine to test. Shake the sample lightly first, then slowly put it into the measuring cylinder, stir it 5 times with a wooden stirring rod, and slowly put down the load disc, when the load disc contacts the sample, let go Hand, start counting down for 1 minute, read the data on the scale after 1 minute and record it as H ₁ (accurate to 0.1cm), then take out the load disc, stir it 5 times with a stirring rod, let it recover fluffy, repeat the above steps for test 3 The data read from the scale are recorded as H ₂ and H ₃ respectively, and the average value of 3 times is recorded as H;

c. Calculation: bulkiness FP value = 39.73*H (unit: inch ³ /30g). The higher the FP number, the better the loft.

Below in conjunction with embodiment and comparative example the present invention will be further described.

The fiber raw material used in following embodiment and comparative example is as follows:

Low-melting point fiber 1: low-melting point polyester fiber, with a melting point of 120°C, a fineness of 2.0D, and a length of 51mm, manufactured by Toray Co., Ltd.;

Low-melting point fiber 2: low-melting point polyester fiber, with a melting point of 120°C, a fineness of 2.0D, and a length of 38mm, manufactured by Toray Co., Ltd.;

Low melting point fiber 3: low melting point polyethylene fiber, melting point is 110°C, denier is 3.0D, length is 51mm, manufactured by Toray Co., Ltd.;

Low-melting point fiber 4: low-melting point polyester/polyethylene bicomponent composite fiber, with a melting point of 110°C, a fineness of 2.0D, and a length of 51mm, manufactured by Toray Corporation;

Low-melting point fiber 5: low-melting point polyethylene fiber, with a melting point of 110°C, a fineness of 1.0D, and a length of 32mm, manufactured by Toray Co., Ltd.;

Non-low melting point fiber 1: three-dimensional hollow crimped polyester fiber treated with silicone oil, with a melting point of 260°C, a fineness of 3.0D, a length of 38mm, a number of crimps of 8/25mm, a crimp rate of 10%, and a hollow rate of 20% , manufactured by Toray Co., Ltd.;

Non-low melting point fiber 2: Three-dimensional hollow crimped polyamide fiber treated with silicone oil, melting point is 230°C, fineness is 2.0D, length is 38mm, number of crimps is 8/25mm, crimp rate is 13%, hollow rate is 20% , manufactured by Toray Co., Ltd.;

Non-low melting point fiber 3: viscose fiber, fineness 1.0D, length 51 mm, number of crimps 4/25 mm, crimp rate 8%, manufactured by Daiwa Bosho Co., Ltd., Japan.

Example 1

Put the non-low-melting fiber 1 into the feed port of the fiber ball forming machine, and through the fiber opening, carding, and ball forming processes, fiber balls with a bulkiness of 450inch ³ /30g are obtained.

Select 15kg of low-melting fiber 1 and 35kg of non-low-melting fiber 1, put the above two fibers into the cotton blender at the same time, the feeding speed is 20m/min, the output speed is 20m/min, after mixing, fiber opening, carding, hot air method Nonwoven webs 1 and ² with a grammage of 15 g/m2 were produced through cross-lapping (roller pressure set at 50 N), oven fusion bonding (oven temperature set at 150° C.) and other projects. On one side of the nonwoven fiber webs 1 and 2, the number of fibers having a length of 10 mm or more per 1 cm ² area was 8.

The nonwoven fiber web 1 is fed into the lower feeding port of the flake processing equipment as the inner layer, and the above-mentioned fiber balls are evenly spread on it (the spreading weight is 70g/㎡), and then the nonwoven fiber is fed into the upper feeding port. The web 2 acts as a skin layer, distributing the fiberballs between the nonwoven webs 1,2. Use a multi-needle quilting machine to quilt the nonwoven fiber webs 1, 2 and the fiber balls together in a straight line along the length direction. The distance between any adjacent fixed points is 6mm to obtain the thermal insulation wadding of the present invention. The specific parameters And the evaluation results are shown in Table 1.

Example 2

When quilting, the distance between any adjacent fixed points is 3mm, and the rest is the same as in Example 1 to obtain the thermal insulation wadding of the present invention. The specific parameters and evaluation results are shown in Table 1.

Example 3

When forming nonwoven fiber webs 1 and 2, 15 kg of low-melting fiber 2 and 35 kg of non-low melting fiber 1 are selected as raw materials, and the pressure of the rollers in the cross-lapping process is set to 90 N. One side of the nonwoven fiber webs 1 and 2 obtained Above, the number of fibers with a length of more than 10 mm in each 1 cm ² area is 0, and the rest are the same as in Example 1 to obtain the thermal insulation flakes of the present invention. The specific parameters and evaluation results are shown in Table 1.

Example 4

On the cotton blending machine, the feeding speed is 10m/min, the output speed is 20m/min, the grammage of the nonwoven fiber webs 1 and ² is 5g/m2, and the rest are the same as in Example 1, and the insulation wadding of the present invention is obtained. The specific parameters and evaluation results are shown in Table 1.

Example 5

Select 50kg of non-low-melting fiber 1 to make non-woven fiber webs 1 and 2 by spunlace method (spunlace pressure is 30 × 10 ⁵ Pa), and on one side, the number of fibers with a length of 10 mm or more in each 1 cm ² area is 8 , the rest are the same as in Example 1, and the insulation flakes of the present invention are obtained. The specific parameters and evaluation results are shown in Table 1.

Example 6

Select down as filler and spread it between the nonwoven fiber webs 1 and 2, and the rest are the same as in Example 1 to obtain the thermal insulation floc of the present invention. The specific parameters and evaluation results are shown in Table 1.

Example 7

Use a non-woven needle punching machine to perform acupuncture processing to fix the nonwoven fiber web and fiber balls together, and the acupuncture processing speed is set to 10m/min. The parameters and evaluation results are shown in Table 1.

Example 8

The non-low-melting fiber 1 is opened and carded to make loose cotton with a bulkiness of 620inch ³ /30g, and the fiber balls are replaced with opened cotton, and the rest are the same as in Example 1 to obtain the thermal insulation wadding of the present invention. The specific parameters and evaluation results are shown in Table 1.

Example 9

On the cotton blending machine, the feeding speed is 15m/min, the output speed is 20m/min, the grammage of the nonwoven fiber webs 1 and 2 is 8g/m ² , and the rest are the same as in Example 1 to obtain the thermal insulation wadding of the present invention The specific parameters and evaluation results are shown in Table 1.

Example 10

The non-low-melting fiber 2 is put into the feeding port of the fiber ball machine, and through the processing engineering of fiber opening, carding and ball forming, fiber balls with a bulkiness of 470inch ³ /30g are obtained.

Select 17.5kg of low-melting fiber 3 and 32.5kg of non-low-melting fiber 1, put the above two fibers into the cotton blender at the same time, the feeding speed is 18m/min, the output speed is 20m/min, after mixing, fiber opening, carding, Nonwoven fiber webs 1 and ² with a grammage of 10 g/m2 were obtained through hot air cross-lapping (roller pressure set at 50 N), oven fusion bonding (oven temperature set at 150°C) and other processing projects. On one side of the nonwoven fiber webs 1 and 2, the number of fibers having a length of 10 mm or more per 1 cm ² area was 8.

The nonwoven fiber web 1 is fed into the lower feeding port of the flake processing equipment as the inner layer, and the above-mentioned fiber balls are evenly spread on it (the spreading weight is 70g/㎡), and then the nonwoven fiber is fed into the upper feeding port. The net 2 is used as the surface layer, so that the fiber balls are distributed between the non-woven fiber webs 1 and 2, and the non-woven fiber webs 1, 2 and the fiber balls are fixed together by the ultrasonic hot pressing method. The specific conditions of the ultrasonic hot pressing method are: 0.2MPa, current 0.5A, flower wheel pressure 1.5Kg, ultrasonic power 1400W, the distance between any adjacent fixed points is 100mm, and the insulation flakes of the present invention are obtained. The specific parameters and evaluation results are shown in Table 2.

Example 11

In the hot-air method cross-lapping process, the pressure of the pressure roller is set to 75N, and on one side of the nonwoven fiber web 1 and 2, the number of fibers with a length of more than 10 mm in each ¹ cm area is 4, and the rest are the same as in Example 1. The thermal insulation flakes of the present invention are obtained, and the specific parameters and evaluation results are shown in Table 2.

Example 12

30kg of low-melting fiber 1 and 20kg of non-low-melting fiber 1 were selected as raw materials for nonwoven webs 1 and 2, and the rest were the same as in Example 8 to obtain the thermal insulation wadding of the present invention. The specific parameters and evaluation results are shown in Table 2.

Example 13

15kg of low-melting fiber 4 and 35kg of non-low-melting fiber 1 were selected as raw materials for nonwoven webs 1 and 2, and the rest were the same as in Example 8 to obtain the thermal insulation wadding of the present invention. The specific parameters and evaluation results are shown in Table 2.

Example 14

17.5kg of low-melting fiber 5 and 32.5kg of non-low-melting fiber 1 were selected as raw materials for nonwoven fiber webs 1 and 2, and the rest were the same as in Example 10 to obtain the thermal insulation wadding of the present invention. The specific parameters and evaluation results are shown in Table 2.

Example 15

Select 8kg of non-low-melting fiber 1 and 2kg of non-low-melting fiber 3 to make fiber balls.

Select 15kg of low-melting fiber 4, 15kg of non-low-melting fiber 1 and 15kg of non-low-melting fiber 3 to make nonwoven fiber webs 1 and 2, and on one side, the number of fibers with a length of more than 10mm per ^1cm2 area is 6. In the manufacturing process of the nonwoven fiber webs 1 and 2, the pressure of the rollers in the cross-lapping process was set to 70N.

The nonwoven fiber webs 1, 2 and the fiber balls are fixed together by the wavy quilting method, the distance between any adjacent fixed points is 10 mm, and the rest is the same as in Example 1 to obtain the thermal insulation wadding sheet of the present invention, the specific parameters And the evaluation results are shown in Table 2.

Example 16

On the gluing machine, apply 10g/ ^m2 of acrylic adhesive (manufactured by Shandong Huayu Chemical Technology Co., Ltd.) to nonwoven webs 1, 2 and fiber balls by roller coating at a speed of 20m/min. Coat 10g/ ^m2 of acrylic adhesive (manufactured by Shandong Huayu Chemical Technology Co., Ltd.) on the contacting side, then pass through an oven with a temperature of 150°C, and finally cool and solidify to form fixed points. The distance is 50 mm, and the rest is the same as in Example 10 to obtain the thermal insulation wadding sheet of the present invention. The specific parameters and evaluation results are shown in Table 2.

Example 17

In the hot-air method cross-lapping process, the pressure of the pressure roller is set to 80N, and on one side of the nonwoven fiber web 1 and 2, the number of fibers with a length of more than 10 mm in each 1 ^cm area is 2, and the rest are the same as in Example 1. The thermal insulation flakes of the present invention are obtained, and the specific parameters and evaluation results are shown in Table 2.

Example 18

On the cotton blending machine, the feeding speed is 30m/min, the output speed is 20m/min, and the grammage of the nonwoven fiber webs 1 and 2 is 20g/m ² , and the rest is the same as in Example 8 to obtain the thermal insulation wadding of the present invention. The specific parameters and evaluation results are shown in Table 1.

The thermal insulation flakes of Examples 1-18 are used to make clothing, bedding, outdoor products, bags or decorative materials.

Comparative example 1

3kg of low-melting fiber 3 and 7kg of non-low-melting fiber 1 were selected and put into the feed port of the fiber ball machine, and fiber balls with a bulkiness of 450inch ³ /30g were obtained through fiber opening, carding, and ball forming.

The fiber balls are distributed between the nonwoven fiber webs 1 and 2, and no quilting process is performed, and the oven is directly used for heat treatment. The temperature of the oven is set at 150°C, and the rest is the same as that of Example 1. The parameters and evaluation results are shown in Table 2.

Table 1

Table 2

According to Table 1 and Table 2,

(1) From Example 1 and Example 2, it can be seen that under the same conditions, the distance between any adjacent fixed points is 6mm. , the washing durability (washing offset) of the two is equivalent, the compression resilience and heat retention of the former are slightly better than the latter, while the bulkiness and hand feeling are significantly better than the latter.

(2) From Example 17 and Example 3, it can be seen that under the same conditions, there are 2/ ^cm2 long fiber insulation batts and nonwoven fiber webs and fillers on the side in contact with the filler. Compared with the thermal insulation batt with 0/ ^cm2 long fibers on the contacting side, the bulkiness, compression resilience, thermal insulation and hand feeling of the two are equivalent, but the washing durability (washing offset) of the former is better. to the latter.

(3) From Example 9 and Example 4, it can be seen that under the same conditions, the thermal insulation flakes made from a nonwoven fiber web with a grammage of 8g/ ^m2 and the nonwoven fiber web with a grammage of 5g/ ^m2 Compared with the prepared thermal insulation wadding, the hand feel, bulkiness, compression resilience and thermal insulation of the two are equivalent, but the washing durability (washing offset) of the former is better than that of the latter.

(4) From Example 1 and Example 5, it can be seen that under the same conditions, the non-woven fiber web is composed of low-melting point fibers and non-low-melting point fibers and the non-woven fiber web is only composed of non-low-melting point fibers. Compared with the sheet, the feel of the two is equivalent, but the bulkiness, compression resilience, heat retention and washing durability (washing offset) of the former are better than the latter.

(5) From Example 1 and Example 6, it can be seen that under the same conditions, the thermal insulation flakes filled with fiber balls are comparable to the thermal insulation flakes filled with down feathers, but the former The bulkiness, compression resilience and washing durability (washing offset) of the product are better than the latter.

(6) From Example 1 and Example 7, it can be seen that under the same conditions, the thermal insulation wadding obtained by the linear quilting method is compared with the thermal insulation wadding obtained by the needle punching method, and the heat retention and washing durability of the two (washing is partial). Shift) are equivalent, while the bulkiness, compression resilience and hand feeling of the former are obviously better than the latter.

(7) From Example 1 and Example 11, it can be seen that under the same conditions, there are 8/cm ^long fiber insulation batts and nonwoven fiber webs and fillers on the side in contact with the filler. There are insulation wadding sheets with 4 long fibers/ ^cm2 on the contacting side, and the hand feeling of the two is equivalent. ) is significantly better than the latter.

(8) From Example 8 and Example 12, it can be seen that under the same conditions, the thermal insulation batt made from a nonwoven fiber web with a low melting point fiber content of 30% by weight is the same as the nonwoven fabric with a low melting point fiber content of 60% by weight. Compared with the thermal insulation flakes made of fiber nets, the bulkiness, washing durability (washing offset), thermal insulation and compression resilience of the two are equivalent, but the former has better hand feeling than the latter.

(9) From Comparative Example 1 and Example 1, it can be seen that under the same conditions, the thermal insulation flakes made of fiber balls formed of low-melting point fibers and non-low-melting point fibers are different from those made of fiber balls made of non-low-melting point fibers only. Compared with the obtained thermal insulation wadding, the former has poor bulkiness, compression resilience, washing durability (washing offset), heat retention and hand feeling.

Claims (13)

The thermal insulation flakes include more than two layers of non-woven fiber webs and fillers, the fillers are distributed between the non-woven fiber webs, and the feature is that the fillers are only composed of non-low-melting fibers. The thermal insulation wadding according to claim 1, characterized in that: the non-woven fiber web and the filler are fixed together by fixed points, and the distance between any adjacent fixed points is more than 4mm. The thermal insulation wadding according to claim 1 or 2, characterized in that: on the side of the non-woven fiber web in contact with the filler, the number of fibers with a length of 10 mm or more per ¹ cm2 area is 1 or more . The thermal insulation wadding according to claim 3, characterized in that: the nonwoven fiber web has a grammage of 8-25 g/m ² . The thermal insulation wadding according to claim 3, characterized in that: the non-woven fiber web is composed of low-melting fiber and non-low-melting fiber, and the melting point of the low-melting fiber is below 140°C. The thermal insulation wadding according to claim 5, characterized in that: the low-melting fiber is polyester fiber, polyamide fiber, polyethylene fiber, polypropylene fiber, polyethylene/polypropylene bicomponent composite fiber, polyester fiber One or more of polyethylene/polyethylene bicomponent composite fibers and polyester/polypropylene bicomponent composite fibers. The insulation wadding according to claim 5, characterized in that: the non-low-melting fiber is one or more of polyester fiber, polyamide fiber and regenerated cellulose fiber. The thermal insulation wadding according to claim 3, characterized in that: the filler is a fiber ball. The thermal insulation wadding according to claim 3, characterized in that: the filler is open cotton. The thermal insulation wadding according to claim 3, characterized in that: the thermal insulation wadding forms fixed points by quilting and fixes the non-woven fiber web and filler together. The thermal insulation wadding according to claim 3, characterized in that: the thermal insulation wadding forms fixed points by hot pressing and fixes the non-woven fiber web and the filler together. The thermal insulation wadding according to claim 3, characterized in that: the thermal insulation wadding is fixed by an adhesive attachment method to form a fixed point and fix the non-woven fiber web and the filler together. Application of the thermal insulation wadding according to any one of claims 1-12 in clothing, bedding, outdoor products, bags, and decorative materials.

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