TW202328529A - 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

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

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 mesh contain low-melting-point fibers, the bonding between 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. Composed 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 synthetic fibers, and the resulting filling material has softness and good formability, etc. 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 overall bulkiness of the product.

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

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.

The technical solution of the present invention is: In order to achieve the above object, the composition of the present invention is as follows: (1) thermal insulation wadding, the thermal insulation wadding includes more than 2 layers of non-woven fiber webs and fillers, and the fillers are distributed on the non-woven fibers Between the webs, the filler consists only of non-low-melt 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 4 mm. (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) In the thermal insulation batt of (3) above, the grammage of the nonwoven fiber web is 8-25 g/m ² . (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 bicomponent composite fiber, polyester/polyethylene bicomponent fiber One or more of component composite fibers and polyester/polypropylene bicomponent composite fibers. (7) In the thermal insulation flake 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 fixed points through 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 point fibers, which can effectively reduce the ratio of fiber fusion bonding, Greatly improve the compression resilience, softness and bulkiness of 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 Insulation materials, sound insulation materials, etc.) etc.

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 filling contains low-melting fiber, the low-melting fiber will be melted and bonded after heat treatment, and will stick together with other surrounding fibers to form a bonding point, resulting in a decrease in the degree of freedom of the fiber constituting the filling, which in turn affects the insulation of the insulation batt. Softness, bulkiness and compression resilience, therefore, in the present invention, it is required that the filler is only composed of non-low melting point fibers.

Preferably, the non-woven fiber web of the insulation batt and the filler are fixed together through fixed points, 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 insulation batt becomes smaller , can further improve washing migration. 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 fiber 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. Further preferably, 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 5 or more. More preferably, 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 5-15.

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, and then cut to obtain short fibers. The number of crimps is preferably 3 to 18 per 25mm, and the crimp rate is 3% to 14%. (2) Using asymmetric cross-section Spinning by spinneret hole and rapid cooling method, 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. The three-dimensional crimped hollow fiber is obtained by stretching and setting process, 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 root fiber, due to the different shrinkage ratios of each component fiber, the single fiber after relaxation shows a high degree of fluff and curl, so as to obtain a fiber with a three-dimensional helical crimp structure, preferably the number of crimps is 3-20/25mm, The curl rate is 6-18%.

Preferably, the nonwoven fiber web has a grammage of 8-25 g/m ² . When the grammage of the nonwoven fiber web is less than 8g/ ^m2 , the nonwoven fiber web is thinner, the strength is lower, the cohesion with the fibers on the filler is smaller, and the washing durability of the insulation wadding decreases. Trend; when the grammage of the nonwoven fiber web is greater than 25g/m ² , 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. This is because the hot air process consumes more energy if the melting point of the low-melting fiber is higher than 140°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, the bonding fastness between the nonwoven fiber web and the filler will be affected, and the washing durability will be reduced. 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 harden.

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 double One or more of component 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, it has little effect on the hand feeling of the nonwoven fiber web, so it is better.

Considering that if 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, the preferred fineness of the low-melting fiber is 1.0-3.0 denier (D). In addition, considering the effect of carding into a web, the preferred length of the low-melting fiber in the present invention is 32-64 mm, and the more preferred length is 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 preferred filler is fiber ball. The fiber balls here can be obtained by known techniques, or can be produced by oneself. It is preferably composed of two or more fibers with different numbers of crimps and crimp rates. Through the crimp difference between fibers, not only can the fiber ball have a softer feel and more excellent bulkiness, but also can make the fiber ball It has more excellent compression resilience and realizes the purpose of machine washing. In the present invention, the bulkiness of the preferred fiber balls is 300-600 cubic inches/30g.

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

Preferably, the insulation batts of the present invention are quilted to form fixing points and fix 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, and if any If the distance between adjacent fixed points is greater than 20mm, the filler has a large space 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 tends to decrease; if the spacing is too wide, the effect of fixing the filling tends to decrease . Therefore, preferably, the width between adjacent stitches in the present invention is 50-200 mm, more preferably 50-100 mm.

Preferably, the thermal insulation batt of the present invention forms fixing points and fixes the nonwoven fiber web and the filler together by heat pressing. The hot pressing method is preferably ultrasonic hot pressing, 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 thermal insulation batt of the present invention forms fixing 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 the fixed point is formed by the hot pressing method or the adhesive attachment method in the present invention, preferably any adjacent The distance between the 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 Together, the thermal insulation flakes of the present invention are obtained. 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 measuring method of each parameter involved in the present invention is as follows: (1) the distance between adjacent fixed points prepares 1 piece of size and is the sample of 50cm * 50cm, under natural tension-free state, it is fixed on the level desktop . Randomly select two adjacent fixed points on the sample, take the center point of the fixed point as the end point, measure the distance between the two ends with a ruler, measure 10 points in total to obtain 10 sets of data, and take the average value as this The distance between adjacent fixed points in the invention. (2) Confirmation of the number of fibers with a length of more than 10mm on the non-woven fiber web a. Sampling Gently decompose the non-woven fiber web from the insulation wadding under a tension-free state, and then cut a length of 1cm × width of 1cm Nonwoven webs were used as test specimens. b. Preparation for measurement Place the side of the test sample that is in contact with the filler facing up and paste the test sample evenly on a piece of black cardboard, and fix it on a horizontal table. c. Measuring The fiber exposed on the surface is gently straightened with tweezers, and its length is measured with a triangle ruler, and the number of fibers with a length higher than 10mm is counted. When taking a reading, keep your eyes level with the jammed paper on the table. d. Calculation 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 to 3 g of short fibers from the nonwoven web or filler as the sample to be tested, and then use a differential scanning calorimeter (DSC) to test the sample with an initial temperature of 30°C and a heating rate of 20°C/min, the final temperature is 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) The type of fiber raw material is judged 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 is 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 absorption in this standard Spectral 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, and place the test sample between two layers of white cotton cloth , the warp direction of the test sample is parallel to the warp direction of the white cotton cloth, quilting is carried out along the weft direction of the white cotton cloth, each quilting line is 10cm apart, 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 procedure specified in ISO 6330:2012(E)4M, and select "A-Rope Drying" 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 put it flat on a transparent glass plate, use a D65 light source to irradiate vertically under the glass plate, use an ordinary digital camera to take pictures above the test sample (the camera is parallel to the test sample), then print the photo, and draw it manually 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 wadding in the remaining two cushions in the same way, Take the average 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) The heat preservation rate is tested according to the 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 under a tension-free state, cut out a non-woven fiber web with a size of 50cm×50cm as a sample and weigh it and record it as m. Gram weight (g/m ² )=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 wadding is tested with reference to the standard of FZ/T 64003-2011 (Appendix A). (9) Compression recovery rate is tested with reference to the standard of FZ/T 64003-2011 (Appendix A). (10) The hand feeling is evaluated by 10 people on the thermal insulation flakes, and it is 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 batt as a sample; b. Use the IDFB bulk test machine for testing. First shake the sample lightly, 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 , 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 3 times , and read the scale data as H ₂ and H ₃ respectively, and record the average value of 3 times as H; c. Calculation: bulkiness FP value=39.73*H (unit: cubic inch/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 Co., Ltd.; Low melting point fiber 5: low melting point polyethylene fiber, melting point is 110°C, denier is 1.0D, length is 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, with a melting point of 230°C, a fineness of 2.0D, a length of 38mm, a number of crimps of 8/25mm, a crimp rate of 13%, and a hollow rate of 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 Textile Co., Ltd., Japan. [Example 1]

The non-low-melting fiber 1 is put 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 450 cubic inches/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 obtained 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/m ² ), and then the nonwoven web is fed into the upper feeding port. The fiber web 2 acts as a skin layer, so that the fiber balls are distributed between the nonwoven fiber 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 3 mm, 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 webs 1 and 2, 15 kg of low-melting fiber 2 and 35 kg of non-low-melting fiber 1 are used as raw materials, and the pressure of the rollers in the cross-lapping process is set to 90 N. On one side of the nonwoven webs 1 and 2, , the number of fibers with a length of more than 10 mm in each ¹ cm area is 0, and the rest are the same as in Example 1 to obtain the thermal insulation wadding sheet 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, and the grammage of the nonwoven fiber webs 1 and 2 is 5g/m ² , and the rest are the same as in Example 1 to obtain the thermal insulation fabric of the present invention. The flakes, 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, the acupuncture processing speed is set to 10m/min, the rest is the same as in Example 1, and the thermal insulation floc of the present invention is obtained, the specific parameters And the evaluation results are shown in Table 1. [Example 8]

The non-low-melting fiber 1 is processed through opening and carding to make open cotton with a bulkiness of 620 cubic inches/30g, and replace the fiber ball with open 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, and 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 material of the present invention. The flakes, specific parameters and evaluation results are shown in Table 1. [Example 10]

The non-low-melting fiber 2 is put into the feed port of the fiber ball machine, and through the processing engineering of fiber opening, carding, and ball forming, fiber balls with a bulkiness of 470 cubic inches/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/m ² ), and then the nonwoven web is fed into the upper feeding port. The fiber web 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: Air pressure 0.2MPa, current 0.5A, flower wheel pressure 1.5Kg, ultrasonic power 1400W, the distance between any adjacent fixed points is 100mm, and the thermal 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 cross-lapping process, the roller pressure 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. Get the thermal insulation wadding of the present invention, 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 the nonwoven webs 1, 2 and fiber balls by roller coating at a speed of 20m/min. Apply 10g/ ^m2 of acrylic adhesive (manufactured by Shandong Huayu Chemical Technology Co., Ltd.) on the contacting side, then pass through an oven at a temperature of 150°C, and finally cool and solidify to form fixed points. The distance between any adjacent fixed points is 50mm, and the rest are the same as in Example 10 to make the 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. Get the thermal insulation wadding of the present invention, 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, the grammage of the nonwoven fiber webs 1 and 2 is 20g/m ² , and the rest are the same as in Example 8 to obtain the thermal insulation fabric of the present invention. The flakes, 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]

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

The fiber balls are distributed between the non-woven fiber webs 1 and 2, without quilting process, directly using an oven for heat treatment, the oven temperature is set at 150°C, the rest is the same as in Example 1, and the insulation flakes are obtained, the specific parameters And the evaluation results are shown in Table 2.

[Table 1] Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Example 7 Example 8 Example 9 filler type polyester polyester polyester polyester polyester Down polyester polyester polyester Melting point (°C) 260 260 260 260 260 ﹣ 260 260 260 form fiber ball fiber ball fiber ball fiber ball fiber ball ﹣ fiber ball Open cotton fiber ball Filling amount(g/m ² ) 70 70 70 70 70 70 70 70 70 nonwoven web low melting point fiber type polyester polyester polyester polyester ﹣ polyester polyester polyester polyester Melting point (°C) 120 120 120 120 ﹣ 120 120 120 120 Content (weight%) 30 30 30 30 ﹣ 30 30 30 30 non-low melting fiber type polyester polyester polyester polyester polyester polyester polyester polyester polyester Melting point (°C) 260 260 260 260 260 260 260 260 260 Number of curls (pieces) 8 8 8 8 8 8 8 8 8 Curl rate (%) 10 10 10 10 10 10 10 10 10 Fiber over 10mm in length Quantity (root) 8 8 0 8 8 8 8 8 8 form Curly Curly no curl Curly Curly Curly Curly Curly Curly Gram weight(g/m ² ) 15 15 15 5 15 15 15 15 8 a fixed way straight line quilting straight line quilting straight line quilting straight line quilting straight line quilting straight line quilting acupuncture straight line quilting straight line quilting Distance between fixed points (mm) 6 3 6 6 6 6 6 6 6 Insulation batting Bulkiness (cm ³ /g) 98 77 93 94 94 93 93 97 95 Compression recovery rate (%) 97 95 91 94 95 95 93 96 94 Heat preservation rate (%) 75 73 67 72 70 74 74 73 73 Washing deviation rate (%) 3.2 3.1 5.6 5.5 4.0 5.0 3.3 3.5 3.4 feel excellent generally excellent excellent excellent excellent good excellent excellent

[Table 2] Example 10 Example 11 Example 12 Example 13 Example 14 Example 15 Example 16 Example 17 Example 18 Comparative example 1 filler type Polyamide polyester polyester polyester Polyamide polyester/viscose Polyamide polyester polyester Polyethylene/polyester Melting point (°C) 230 260 260 260 230 260/- 230 260 260 110/260 form fiber ball fiber ball Open cotton Open cotton fiber ball fiber ball fiber ball fiber ball Open cotton fiber ball Filling amount(g/m ² ) 70 70 70 70 70 70 70 70 70 70 nonwoven web low melting point fiber type polyethylene polyester polyester Polyester/ Polyethylene polyethylene Polyester/ Polyethylene polyethylene polyester polyester polyester Melting point (°C) 110 120 120 110 110 110 110 120 120 120 Content (weight%) 35 30 60 30 35 30 35 30 30 30 non-low melting fiber type polyester polyester polyester polyester polyester polyester/viscose polyester polyester polyester polyester Melting point (°C) 260 260 260 260 260 260/- 260 260 260 260 Number of curls (pieces) 8 8 8 8 8 8/4 8 8 8 8 Curl rate (%) 10 10 10 10 10 10/8 10 10 10 10 Fibers with a length of 10mm or more Quantity (root) 8 4 8 8 8 6 8 2 8 8 form Curly Curly Curly Curly Curly Curly Curly Curly Curly Curly Gram weight(g/m ² ) 10 15 15 15 10 15 10 15 20 15 a fixed way Ultrasonic hot pressing straight line quilting straight line quilting straight line quilting Ultrasonic hot pressing Wave Quilted Adhesive straight line quilting straight line quilting oven heating Distance between fixed points (mm) 100 6 6 6 100 10 50 6 6 6 Insulation batting Bulkiness (cm ³ /g) 96 96 96 95 98 94 93 93 97 65 Compression recovery rate (%) 97 95 95 93 96 93 95 91 96 89 Heat preservation rate (%) 74 73 72 74 77 74 70 67 74 56 Washing deviation rate (%) 3.3 3.8 3.6 3.5 3.9 4.0 4.0 4.6 3.5 7.5 feel excellent excellent good excellent excellent excellent good excellent excellent Difference

According to Table 1 and Table 2, (1) From Example 1 and Example 2, it can be known that under the same conditions, the distance between any adjacent fixed point is 6mm and the distance between any adjacent fixed point is Compared with the 3mm insulation wadding, the washing durability (washing offset) of the two is equivalent. The compression resilience and heat preservation 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 clearly superior to the latter. (8) From Example 8 and Example 12, it can be seen that under the same conditions, the thermal insulation flakes prepared by using a non-woven fiber web with a low-melting fiber content of 30% by weight and using a non-woven fabric with a low-melting 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 by using fiber balls formed by low-melting point fibers and non-low-melting point fibers are different from those made by using only fiber balls formed by non-low-melting point fibers. Compared with the obtained thermal insulation wadding, the former has poor bulkiness, compression resilience, washing durability (washing offset), heat retention and hand feeling.

1: Nonwoven fiber web 2: Nonwoven fiber web 3: Filling 4: fixed point 5: Fibers exposed on the side of the nonwoven web in contact with the filler 6: Distance between adjacent fixed points 7: Distance between adjacent fixed points

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.

1: Nonwoven fiber web

2: Nonwoven fiber web

3: Filling

4: fixed point

5: Fibers exposed on the side of the nonwoven web in contact with the filler

6: Distance between adjacent fixed points

Claims (13)

A thermal insulation wadding, comprising 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: the fillers are only composed of non-low melting point fibers. The thermal insulation batt according to claim 1, wherein the nonwoven fiber web and the filler are fixed together through fixed points, and the distance between any adjacent fixed points is more than 4mm. The insulation batt according to claim 1 or 2, 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. The insulation batt according to claim 3, wherein the nonwoven fiber web has a grammage of 8 to 25 g/m ² . The insulation batt according to claim 3, 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 below 140°C. The thermal insulation wadding of claim 5, wherein the low-melting fiber is polyester fiber, polyamide fiber, polyethylene fiber, polypropylene fiber, polyethylene/polypropylene bicomponent composite fiber, polyester/polyethylene One or more of bicomponent composite fibers and polyester/polypropylene bicomponent composite fibers. The insulation batt according to claim 5, wherein the non-low-melting fiber is one or more of polyester fiber, polyamide fiber and regenerated cellulose fiber. The insulation batt according to claim 3, wherein the filler is fiber balls. The insulation batt according to claim 3, wherein the filler is opened cotton. The thermal insulation batt according to claim 3, wherein the thermal insulation batt is formed by quilting to form fixed points and fix the non-woven fiber web and the filler together. The thermal insulation wadding sheet according to claim 3, wherein the thermal insulation wadding sheet is heat-pressed to form fixed points and fix the nonwoven fiber web and the filler together. The thermal insulation wadding sheet according to claim 3, wherein the thermal insulation wadding sheet is fixed by an adhesive attachment method to form a fixed point and fix the nonwoven fiber web and the filler together. An application of the thermal insulation floc in any one of Claims 1 to 12, which is used in clothing, bedding, outdoor products, bags, and decorative materials.