Lightweight thermal insulation fabric

Abstract

The invention discloses a light-weight thermal insulation fabric. The fabric is of a double-layer or double-layer structure and at least contains hollow polyester staple fibers, the hollow rate of the hollow polyester staple fibers is 10%-50%, and the content of the hollow polyester staple fibers is 5%-30% by weight. Compared with a fabric using hollow PET filaments, on the basis that the light weight and the heat retention property are guaranteed, the chemical fiber feeling of the fabric is improved, and the fabric is particularly suitable for being used for manufacturing winter clothes and the like.

Description

Technical Field

[0001] The invention relates to a fabric, in particular to a lightweight thermal insulation fabric. Background Art

[0002] Traditional thermal insulation clothing usually prevents heat dissipation by using high-weight fabrics or increasing the number of fabric layers. However, this type of clothing is thick and has poor breathability, which can easily cause a feeling of stuffiness and weight, and the appearance is bloated and unsightly.

[0003] With the rapid development of the economy, consumers' requirements are also gradually increasing. For this reason, people have developed lightweight thermal insulation clothing. For example, patent document CN102560815A discloses a lightweight thermal insulation fabric, which specifically discloses that the fabric is a double structure or a multi-layer structure, at least the inner weft and / or the inner warp is a hollow polyester fiber yarn, and the hollow rate of the hollow polyester fiber yarn is 20% to 80%. Such a fabric is both lightweight and thermal insulation, but the hollow polyester fiber yarn is composed of filament multifilament, the fabric has a strong chemical fiber feel, and when such yarn is used in the inner weft, the skin-friendliness is poor.

[0004] For another example, patent document CN207016942U discloses a warm and anti-static fabric, which specifically discloses that the fabric is a woven weft double structure, which is interwoven by warp yarn, lining weft and surface weft, wherein the lining weft is made of hollow polyester filament and spandex covered yarn, and the warp yarn and surface weft are made of blended yarn of mercerized Australian wool, modal and conductive nylon. The fabric has excellent warmth retention in a thinner state and is comfortable and non-restraining. However, since the lining weft is made of filament covered yarn, it has poor skin affinity. Summary of the invention

[0005] The object of the present invention is to provide a cotton-feel fabric with excellent light-weight warmth retention and skin-friendliness.

[0006] The light-weight heat-insulating fabric of the present invention is a double-layer or double-layer structure, and contains at least hollow polyester (hollow PET) short fibers, wherein the hollow rate of the hollow polyester short fibers is 10% to 50%, and the content is 5 to 30% by weight.

[0007] The present invention utilizes double or double-layered fabrics to accommodate as much static air as possible in the fabric structure to improve thermal insulation; and when hollow PET short fibers are used, compared with hollow PET filaments, the chemical fiber feel of the fabric is improved while ensuring lightness and thermal insulation. The fabric of the present invention is particularly suitable for making winter clothing, etc. DETAILED DESCRIPTION

[0008] The lightweight thermal insulation fabric of the present invention is a double or double-layer fabric. The double fabric here refers to a double warp fabric or a double weft fabric, and the double-layer fabric here refers to a fabric in which the warp yarns of the surface and the inner system are interwoven with the weft yarns of the surface and the inner system respectively. It is preferred that the double or double-layer fabric with the surface texture showing a twill, plain or complex texture effect can give the fabric a stronger texture and visual impact.

[0009] In order to give the fabric a good lightweight effect and thermal insulation, it contains at least hollow PET short fibers. The hollow rate of the hollow PET short fibers is 10% to 50%, and the content in the fabric is 5 to 30% by weight. In this way, the fabric can be given a good bony, fluffy and lightweight effect. If the content of the hollow PET short fibers is less than 5% by weight, it will not have a lightweight effect, so it is not preferred; if the content of the hollow PET short fibers is higher than 30% by weight, the fabric cost is too high, so it is not preferred.

[0010] In the present invention, the hollow PET staple fiber is not particularly limited in the form of existence, and can exist in a staple yarn formed by spinning alone or blending with other fibers, or in a plied yarn or spandex-coated yarn A formed by the above-mentioned staple yarn, preferably in a plied yarn or spandex-coated yarn A, wherein the spandex-coated yarn A can be a single-covered yarn or a double-covered yarn, preferably a double-covered yarn, so that the delicate feeling of the fabric can be improved. The other fibers here are not particularly limited, and can be cellulose fibers or synthetic fibers. Cellulose fibers can include cotton fibers, linen fibers, viscose fibers, modal fibers, tencel fibers, bamboo fibers, etc., and synthetic fibers can include polyester fibers (PET), polyacrylonitrile fibers, etc. Among them, polyacrylonitrile fiber can improve the heat preservation and heat storage effect, while viscose fiber has a higher regain. After being blended with hollow PET fiber, the strong hydrophilic polar groups on the viscose fiber molecular chain combine with water molecules in the air through hydrogen bonds. After the combination, the water molecules are converted from the original gaseous state to the liquid state, and the kinetic energy of the water molecules is reduced and converted into heat (energy) and released, and the hygroscopic heat generation is better. In the present invention, as a preference, the plied yarn or spandex coated yarn A also contains one or more of viscose, polyacrylonitrile and polyamide, and more preferably viscose fiber. In addition, in the present invention, functional particles can be added to the fiber as needed to impart antistatic, antibacterial and deodorizing functions.

[0011] Preferably, the elastic yarn of the present invention is a spandex core-spun yarn or a spandex coated yarn B, and its cortex raw material is one or more of ordinary polyester, viscose, cotton and tencel, so that the fabric can be given good elastic elongation and recovery performance, which is more skin-friendly, warm and stylish when worn, and it feels relaxed and comfortable even when doing large-scale exercises. Among them, the spandex coated yarn B can be a single-covered yarn or a double-covered yarn, preferably a double-covered yarn. The fineness of the spandex in the spandex core-spun yarn or the spandex coated yarn B here is not particularly limited, and is preferably 40 to 100 deniers (abbreviated as D). When the spandex fineness is lower than 40D, the elasticity and recovery of the fabric tend to decrease, so it is not preferred; when the spandex fineness is higher than 100D, under the same conditions, the fabric weight tends to increase, so it is not preferred.

[0012] The spinning method of the above-mentioned staple yarn is not particularly limited, and it can be ring spinning, compact spinning, siro spinning, siro compact spinning, vortex spinning, etc. Preferably, compact spinning or siro compact spinning is used in the present invention, so that the fabric can be given the property of not easy to pilling while maintaining a good fluffy feel. This is because when ring spinning is used, the yarn hairiness is long, and the friction of the fabric is prone to cause pilling, so it is not preferred; when using air spinning methods such as vortex spinning and air spinning, the fabric is easy to become hard and flat, and the wearing performance tends to decline, so it is not preferred.

[0013] Preferably, at least one side of the fabric of the present invention is a raised surface, and the raised surface has a pilling resistance of 2.5 or above as measured according to JIS L 1076A method 10H.

[0014] Preferably, according to the test of ISO 15831 method-2004, the thermal insulation value of the fabric of the present invention is above 0.20.

[0015] Preferably, according to the test of ISO 18782 method-2015, the moisture absorption and heat generation ΔTmax of the fabric of the present invention is above 2.5°C.

[0016] Preferably, according to the test of JIS L 1096B method-2010, the elastic elongation of the fabric of the present invention in the warp and weft directions is both above 15%, and the elastic recovery rate is both above 80%.

[0017] The present invention will be further described below with reference to the embodiments and comparative examples.

[0018] The various performance testing methods of the present invention are as follows:

[0019] (1) Thermal insulation

[0020] Tested according to ISO 15831-2004.

[0021] (2) Hygroscopic heat generation

[0022] Tested according to ISO 18782-2015.

[0023] (3) Elongation and elongation recovery

[0024] Tested according to JIS L 1096B method-2010.

[0025] (4) Anti-pilling

[0026] Tested according to JIS L 1076A method-2012.

[0027] (5) Hollowness ratio of hollow PET fiber

[0028] a. Draw out 5 cm long warp yarn and 5 cm long weft yarn from the fabric at random, mark them with numbers, and cut the drawn warp and weft yarns into thin slices longitudinally as samples for later use;

[0029] b. Use an optical microscope (model: KEYENCE VHX-6000) to observe and photograph the sample at a magnification of 100 times, identify the yarn containing hollow fibers, and record the number. Distinguish whether it is warp or weft according to the recorded number, then extract the short-staple yarn containing hollow PET fibers from the same position of the fabric, and then test it according to FZ / T50002 method-2013 chemical fiber profile test method.

[0030] (6) Content of hollow polyester staple fibers

[0031] a. Extract 5 cm long warp yarn and 5 cm long weft yarn from the fabric at random, mark them with numbers, and cut the extracted warp and weft yarns into thin slices longitudinally as cross-sectional sample preparation samples for later use;

[0032] b. Use an optical microscope (model: KEYENCE VHX-6000) to observe and photograph the sample at a magnification of 100 times, identify the staple yarn containing hollow polyester fibers, and record the number. Distinguish whether it is warp yarn or weft yarn based on the recorded number, and calculate the content of hollow polyester staple fibers based on the yarn count and density of the fabric analysis.

[0033] Embodiment 01:

[0034] The warp yarn is made of 20-neg spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-neg ordinary round-section PET / viscose colored spun yarns), and its elastic elongation is 50%; the surface weft (i.e., weft yarn 1) is made of 32-neg spandex core-spun yarn (the skin layer is ordinary round-section PET / viscose colored spun fiber), and its elastic elongation is 50%; the inner weft (i.e., weft yarn 2) is made of 17-neg plied yarn (the ply yarn 1 is a 40-neg blended yarn formed by hollow PET fiber with a hollow rate of 30% and viscose, and the ply yarn 2 is a blended yarn of polyacrylonitrile and viscose The 30-ne blended yarn is formed, the ratio of the surface weft to the inner weft is 2:1, and the grey cloth is woven according to the double weft structure, and then refined (80℃*50m / min) → double-sided singeing → washing → drying → intermediate shaping (190℃*35m / min, modified polydimethylsiloxane softener) → raising and shearing → post-finishing shaping (190℃*35m / min, cationic anti-pilling agent HS-86) → pre-shrinking shaping (102℃*30m / min), and the weight of the present invention is 300g / m 2 The fabric comprises hollow PET short fibers having a content of 7 wt %. See Table 1 for details.

[0035] Embodiment 02:

[0036] The outer warp (i.e. warp yarn 1) uses 32-ne spandex core-spun yarn (the skin is Tencel / viscose), and its elastic elongation is 50%; the inner warp (i.e. warp yarn 2) uses 17-ne spandex double-covered yarn A (the outer covering yarn 1 is a 40-ne blended yarn formed by hollow PET fiber with a hollow rate of 30% and viscose, and the outer covering yarn 2 is a 30-ne blended yarn formed by polyacrylonitrile and viscose), the ratio of the outer warp to the inner warp is 2:1, and its elastic elongation is 50%; the weft yarn uses 40-ne spandex core-spun yarn (the skin is Tencel / viscose), and its elastic elongation is 50%. The grey cloth is obtained by double weaving, and then refined (80℃*50m / min) → double-sided singeing → washing → drying → intermediate setting (190℃*35m / min, modified polydimethylsiloxane softener) → dyeing (130℃*40min) → reduction cleaning → dyeing (60℃*30min) → soaping → raising and shearing → post-finishing setting (190℃*35m / min, cationic anti-pilling agent HS-86) → tank steaming (110℃*30m / min) to obtain the present invention with a gram weight of 300g / m 2 The fabric comprises hollow PET short fibers having a content of 7 wt %. See Table 1 for details.

[0037] Embodiment 03:

[0038] The outer warp (i.e., warp yarn 1) is made of 20-neg spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-neg ordinary round-section PET / combed cotton yarns), and its elastic elongation is 50%; the inner warp (i.e., warp yarn 2) is made of 40-neg spandex core-spun yarn (the skin layer is ordinary round-section PET / viscose), and its elastic elongation is 50%; the outer weft (i.e., weft yarn 1) is made of 32-neg spandex core-spun yarn (the skin layer is ordinary round-section PET / combed cotton), and its elastic elongation is 50%; the inner weft (i.e., weft yarn 2) is made of 19-neg plied yarn (the ply yarn 1 is a 40-neg blended yarn formed by hollow PET fiber with a hollow rate of 30% and viscose, and the ply yarn 2 is a polypropylene blended yarn). The blended yarn of 38 Ne formed by acrylonitrile and viscose) with a ratio of surface weft to inner weft of 2:1 is woven according to a double-layer structure to obtain a grey cloth, and then refined (80℃*50m / min) → double-sided singeing → washing → drying → mercerizing → intermediate setting (190℃*35m / min, modified polydimethylsiloxane softener) → dyeing (130℃*40min) → reduction cleaning → dyeing (60℃*30min) → soaping → raising and shearing → post-finishing setting (190℃*35m / min, cationic anti-pilling agent HS-86) → tank steaming (110℃*30m / min) to obtain a fabric with a gram weight of 330g / ㎡ of the present invention. Among them, the content of hollow PET staple fibers is 7% by weight. See Table 1 for details.

[0039] Embodiment 04:

[0040] The warp yarn is made of 20-neg spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-neg ordinary round-section PET / viscose colored spun yarns), and its elastic elongation is 30%; the surface weft (i.e., weft yarn 1) is made of 32-neg spandex core-spun yarn (the skin layer is ordinary round-section PET / viscose colored spun fiber), and its elastic elongation is 30%; the inner weft (i.e., weft yarn 2) is made of 17-neg plied yarn (plied yarn 1 is a 40-neg blended yarn formed by hollow PET fiber with a hollow rate of 10% and viscose, and ply yarn 2 is a blended yarn of polyacrylonitrile and viscose The 30-ne blended yarn is formed, the ratio of the surface weft to the inner weft is 2:1, and the grey cloth is woven according to the double weft structure, and then refined (80℃*50m / min) → double-sided singeing → washing → drying → intermediate shaping (190℃*35m / min, modified polydimethylsiloxane softener) → raising and shearing → post-finishing shaping (190℃*35m / min, cationic anti-pilling agent HS-86) → pre-shrinking shaping (102℃*30m / min), and the weight of the present invention is 330g / m 2 The content of the hollow PET short fibers is 7% by weight. See Table 1 for details.

[0041] Embodiment 05:

[0042] The warp yarn is a 20-neg spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-neg ordinary round-section PET / viscose color-spun yarns), and its elastic elongation is 10%; the surface weft (i.e., weft yarn 1) is a 32-neg spandex core-spun yarn (the skin layer is ordinary round-section PET / viscose color-spun fiber), and its elastic elongation is 10%; the inner weft (i.e., weft yarn 2) is a 17-neg plied yarn (the ply yarn 1 is a 40-neg blended yarn formed by hollow PET fiber with a hollow rate of 50% and viscose, and the ply yarn 2 is a 30-neg blended yarn formed by polyacrylonitrile and viscose), the ratio of the surface weft to the inner weft is 2:1, and the rest is the same as in Example 04, to obtain a fabric with a gram weight of 300g / ㎡ of the present invention. Among them, the content of the hollow PET short fiber is 7% by weight. See Table 1 for details.

[0043] Embodiment 06:

[0044] The warp yarn is a 20-nein spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-nein ordinary round-section PET / viscose color-spun yarns), and its elastic elongation is 50%; the surface weft (i.e., weft yarn 1) is a 32-nein spandex core-spun yarn (the skin layer is ordinary round-section PET / viscose color-spun fiber), and its elastic elongation is 50%; the inner weft (i.e., weft yarn 2) is a 17-nein plied yarn (the ply yarn 1 is a 40-nein blended yarn formed by hollow PET fiber with a hollow rate of 30% and viscose, and the ply yarn 2 is a 30-nein blended yarn formed by polyacrylonitrile and viscose), the ratio of the surface weft to the inner weft is 1:1, and the rest is the same as in Example 04, to obtain a fabric with a gram weight of 300g / ㎡ of the present invention. Among them, the content of the hollow PET short fiber is 19% by weight. See Table 2 for details.

[0045] Embodiment 07:

[0046] The warp yarn is selected from 20-neg spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-neg common round-section PET / viscose color-spun yarns), and its elastic elongation is 50%; the surface weft (i.e., weft yarn 1) is selected from 32-neg spandex core-spun yarn (the skin layer is ordinary round-section PET / viscose color-spun fiber), and its elastic elongation is 50%; the inner weft (i.e., weft yarn 2) is selected from 17-neg plied yarn (plied yarn 1 is a 30-neg blended yarn formed by hollow PET fiber with a hollow rate of 30% and viscose, and ply yarn 2 is a 38-neg blended yarn formed by polyacrylonitrile and viscose), the ratio of the surface weft to the inner weft is 1:3, and the rest is the same as in Example 04, and the weight of the present invention is 300g / m 2 The content of the hollow PET short fibers is 28% by weight. See Table 2 for details.

[0047] Comparative Example 01:

[0048] The warp yarn and the weft yarn 1 are both made of 20-neg spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-neg ordinary round-section PET / viscose colored spun yarns), and their elastic elongation is 50%; the weft yarn 2 is made of 17-neg plied yarn (the ply yarn 1 is a 40-neg blended yarn formed by hollow PET fiber with a hollow rate of 30% and viscose, and the ply yarn 2 is a 40-neg blended yarn formed by polyacrylonitrile and viscose), the surface weft and the inner weft are arranged in a ratio of 1:1, and the grey cloth is woven with a 2 / 2 right twill structure. The rest is the same as in Example 01, and the obtained weight is 300g / m 2 See Table 2 for details.

[0049] Comparative Example 02:

[0050] The warp yarn is selected from 20-neg spandex double-covered yarn B (the outer covering yarns 1 and 2 are both 40-neg ordinary round-section PET / viscose color-spun yarns), and its elastic elongation is 50%; the surface weft (weft yarn 1) is selected from 32-neg spandex core-spun yarn (the skin layer is ordinary round-section PET / viscose color-spun fiber), and its elastic elongation is 50%; the inner weft (weft yarn 2) is selected from 17-neg plied yarn (plied yarn 1 is a 30-neg blended yarn formed by hollow PET fiber with a hollow rate of 30% and viscose, and ply yarn 2 is a 38-neg blended yarn formed by polyacrylonitrile and viscose), the ratio of surface weft to inner weft is 1:5, and the rest is the same as in Example 04, and the obtained weight is 300g / m 2 See Table 2 for details.

[0051] Comparative Example 03:

[0052] The warp yarn and the surface weft (weft yarn 1) are both made of 150D spandex hollow covered yarn (the skin layer is ordinary round cross-section PET DTY), and its elastic elongation is 50%; the inner weft (weft yarn 2) is made of 150D / 96f hollow PET DTY (hollowness is 30%), the ratio of the surface weft to the inner weft is 3:1, and the rest is the same as in Example 04, and the weight is 300g / m 2 See Table 2 for details.

[0053] Table 1

[0054]

[0055] Table 2

[0056]

Claims

1. Lightweight thermal insulation fabric, double or double layer structure, characterized by: The fabric contains at least hollow polyester short fibers, wherein the hollow rate of the hollow polyester short fibers is 10% to 50%, and the content of the hollow polyester short fibers is 5% to 30% by weight.

2. The lightweight thermal insulation fabric according to claim 1 is characterized in that: The hollow polyester staple fibers exist in the plied yarn or the spandex covered yarn A, and the plied yarn or the spandex covered yarn A also contains one or more of viscose, polyacrylonitrile and polyamide.

3. The lightweight thermal insulation fabric according to claim 1 is characterized in that: The fabric also contains spandex core-spun yarn or spandex covered yarn B, and the raw material of the skin layer is one or more of common polyester, viscose, cotton and tencel.

4. The lightweight thermal insulation fabric according to claim 1 is characterized in that: The fabric has at least one side that is raised, and according to the test of JIS L 1076A method-2012, the anti-pilling property of the raised side of the fabric is above level 2.

5.

5. The lightweight thermal insulation fabric according to any one of claims 1 to 4, characterized in that: According to the test of ISO 15831 method-2004, the thermal insulation value of the fabric is above 0.

20.

6. The lightweight thermal insulation fabric according to any one of claims 1 to 4, characterized in that: According to the test of ISO 18782 method-2015, the moisture absorption and heat generation △Tmax of the fabric is above 2.5℃.

7. The lightweight thermal insulation fabric according to any one of claims 1 to 4, characterized in that: According to the test of JIS L1096B method-2010, the elongation of the fabric in the warp and weft directions is both above 15%, and the elastic recovery rate is both above 80%.

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