Light-absorbing, heating and heat-preserving knitted fabric and preparation method thereof

Abstract

The invention provides a light-absorbing, heating and heat-preserving knitted fabric and a preparation method thereof, the light-absorbing, heating and heat-preserving knitted fabric comprises a surface layer, a middle layer and an inner layer, the surface layer is formed by weaving first heating blended yarns, the middle layer is formed by weaving heating polyester yarns, and the inner layer is formed by weaving full cotton yarns or second heating blended yarns; the first heating blended yarn and the second heating blended yarn are both composed of heating polyester yarns and cotton fibers, and the heating polyester yarns are composed of polyester fibers and light-absorbing heating materials. The first heating blended yarn, the heating polyester yarn and the all-cotton yarn / second heating blended yarn are adopted, so that the fabric keeps a good heat preservation effect and is washable; moreover, the middle layer adopts the heating polyester yarns, so that the fabric keeps certain stiffness, and the fabric is washable and tangible; the inner layer is formed by the all-cotton yarns or the second heating blended yarns, so that the fabric has better softness and is more comfortable to wear.

Description

Technical Field

[0001] The invention relates to the technical field of textile fabrics, and in particular to a light-absorbing, heat-generating, thermal-insulating knitted fabric and a preparation method thereof. Background Art

[0002] At present, the market demand for various functional fabrics is increasing day by day, among which heat-generating fabrics are particularly favored by consumers.

[0003] The prior art with publication number CN206015380U discloses a fabric with both heat insulation and light absorption and heating functions, including a fabric base, a light absorption and heating layer, and a heat insulation layer; the light absorption and heating layer is dispersed with a light absorption and heating additive and fixed to the outer layer of the fabric base; the heat insulation layer is dispersed with glass beads and fixed to the inner layer of the fabric base; the prior art has the following problems: the fabric in the prior art has the following problems: (1) the base layer is made of pure cotton fabric, and the shape retention of the fabric is poor; (2) (2) the thermal insulation layer of the fabric adopts a dispersed additive method, and the fabric is not washable. After repeated use, the additive is easy to fall off, which will weaken its heating and thermal insulation effect. Summary of the invention

[0004] In view of this, the present invention aims to propose a light-absorbing heat-insulating knitted fabric and a preparation method thereof, so as to solve the problems in the prior art that the base layer adopts pure cotton fabric, the shape retention of the fabric is poor; the insulation layer of the fabric adopts a dispersion additive, the fabric is not washable, and the additive is easy to fall off after repeated use, which will weaken its heat-insulating effect.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] A light-absorbing, heat-generating, and thermal-insulating knitted fabric comprises a surface layer, a middle layer, and an inner layer. The surface layer is woven from a first heat-generating blended yarn, the middle layer is woven from a heat-generating polyester yarn, and the inner layer is woven from pure cotton yarn or a second heat-generating blended yarn.

[0007] This setting adopts the first heating blended yarn, heating polyester yarn, pure cotton yarn or the second heating blended yarn, so that the fabric maintains good thermal insulation and is washable; moreover, the middle layer adopts heating polyester yarn, which also makes the fabric maintain a certain stiffness, making the fabric washable and shapeable; the pure cotton yarn / second heating blended yarn forms the inner layer, which makes the fabric have better softness and is more comfortable to wear.

[0008] Furthermore, the pattern of the fabric is a nine-way cycle, and the order from bottom to top is as follows:

[0009] The organization structure of the first route is needle cylinder floating thread organization, needle cylinder floating thread organization, and needle cylinder tucking organization in sequence;

[0010] The organization structures of the second, fifth, and eighth routes are respectively needle-circle organization, needle-circle organization, and needle-circle organization;

[0011] The organizational structures of the third, sixth, and ninth routes are respectively syringe small circle organization, syringe small circle organization, and syringe small circle organization;

[0012] The organization structure of the fourth route is needle float organization, needle tuck organization, and needle float organization;

[0013] The seventh route organization structure is needle tuck organization, needle float organization, and needle float organization;

[0014] The fabric formed by the weaving structure in this setting is flannel fabric, which has good thermal insulation effect. The small loop structure of the middle layer makes the middle layer more fluffy and tangible, and the fabric has good thermal insulation effect. The floating thread and loop structure of the inner layer make the fabric more fluffy and warm.

[0015] Furthermore, the second route, the fifth route, and the eighth route are woven into a surface layer, the third route, the sixth route, and the ninth route are woven into a middle layer, and the fourth route and the seventh route are woven into an inner layer.

[0016] Furthermore, the thickness of the first heating blended yarn is 20-40S.

[0017] This setting controls the thickness of the yarn on the surface layer, so that the fabric has a certain degree of air permeability, good wear resistance and strong practicality.

[0018] Furthermore, the thickness of the heating polyester yarn is 50-150D.

[0019] This setting controls the thickness of the yarn in the middle layer, which not only makes the middle layer more stiff and shaped, but also forms a certain gap in the middle layer, which can accommodate more static air. The middle layer cooperates with the inner layer and the surface layer to further improve the warmth retention of the fabric.

[0020] Furthermore, the thickness of the pure cotton yarn or the second heating blended yarn is 5~12S.

[0021] This setting controls the thickness of the yarn in the inner layer to improve the softness of the fabric while maintaining good breathability. At the same time, the yarn has a larger specific surface area, which can better absorb air and improve the warmth retention of the fabric.

[0022] Furthermore, the first heat-generating blended yarn and the second heat-generating blended yarn are both composed of heat-generating polyester yarn and cotton fiber.

[0023] The use of cotton fibers in the blended yarn of this setting allows the wearer to stay warm while enjoying good air circulation, avoiding excessive stuffiness and discomfort, and also increasing the softness of the fabric and improving the comfort of the wearer; the heating polyester yarn can give the fabric light-absorbing and radiating properties, and can maintain the stability of the fabric, making the fabric less likely to deform, and the fabric can maintain continuous thermal insulation. The blended yarn of this setting has a certain shape stability and can adapt to deformation to a certain extent. The fabric made of this blended yarn has good wrinkle resistance and shape retention, while still being soft and comfortable.

[0024] Furthermore, the heat-generating polyester yarn is composed of polyester fiber and light-absorbing heat-generating material.

[0025] Furthermore, the light-absorbing and heat-generating material is nanopowder.

[0026] Furthermore, the light-absorbing and heat-generating material is one of olefin earth, graphene, and ceramic powder.

[0027] Furthermore, the tensile strength of the heating polyester yarn is 2.1-5.1 cN / dtex, and the elongation at break is 25-45%.

[0028] This setting ensures that the fabric has good thermal insulation and is washable while maintaining a stable shape.

[0029] A method for preparing a light-absorbing, heat-generating, thermal-insulating knitted fabric, which is used to prepare the above-mentioned fabric, comprises the following steps:

[0030] S1, yarn count preparation;

[0031] S2, weaving;

[0032] S3, pre-processing;

[0033] S4, dyeing treatment;

[0034] S5, finishing.

[0035] The fabric of the present invention further enhances the softness and shape retention of the fabric, making the fabric washable and maintaining a good heat preservation rate.

[0036] Further, step S5 includes the following steps:

[0037] S51, soft finishing;

[0038] S52, drying;

[0039] S53, roughening treatment;

[0040] S54, finalization treatment;

[0041] S55, shearing treatment;

[0042] S56, re-shaping process.

[0043] Furthermore, in step S3, the pretreatment is specifically to perform heat setting treatment on the woven fabric, the heat setting treatment temperature is 155-165° C., and the time is 1-2 minutes.

[0044] Compared with the prior art, the light-absorbing, heat-generating, thermal-insulating knitted fabric and the preparation method thereof described in the present invention have the following advantages:

[0045] 1) The present invention adopts the first heating blended yarn, heating polyester yarn, pure cotton yarn or the second heating blended yarn, so that the fabric maintains a good heat preservation effect and is washable; moreover, the middle layer adopts the heating polyester yarn, which also makes the fabric maintain a certain stiffness, making the fabric washable and shaped; the pure cotton yarn / second heating blended yarn forms the inner layer, so that the fabric has good softness and is more comfortable to wear;

[0046] 2) The fabric formed by the woven structure in this setting is flannel fabric, which has good thermal insulation effect, and the small loop structure of the middle layer makes the middle layer more fluffy and shaped, and the fabric has good thermal insulation effect. The floating thread and tuck structure of the inner layer make the fabric more fluffy and warm;

[0047] 3) The use of cotton fibers in the blended yarn of the present invention allows the wearer to stay warm while enjoying good air circulation, avoiding excessive stuffiness and discomfort, and can also increase the softness of the fabric and improve the comfort of the wearer; the heat-generating polyester yarn can give the fabric light-absorbing and radiating properties, and can maintain the stability of the fabric, making the fabric not easy to deform, and the fabric can maintain continuous thermal insulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 It is a schematic structural diagram of the light-absorbing, heat-generating and heat-insulating knitted fabric of the present invention;

[0049] Figure 2 This is a knitting structure diagram of the light-absorbing, heat-generating and thermal-insulating knitted fabric of the present invention;

[0050] Figure 3 This is a knitting arrangement diagram of the light-absorbing, heat-generating and thermal-insulating knitted fabric of the present invention.

[0051] Description of reference numerals:

[0052] 1- surface layer; 2- middle layer; 3- inner layer. DETAILED DESCRIPTION

[0053] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. Example 1

[0054] like Figures 1 to 3 As shown, the present invention relates to a light-absorbing, heat-generating, thermal-insulating knitted fabric, which is woven by a single-sided large circular machine with a needle gauge of 12-24G. The fabric comprises a surface layer 1, a middle layer 2, and an inner layer 3. The surface layer is woven from a first heat-generating blended yarn, the middle layer is woven from a heat-generating polyester yarn, and the inner layer is woven from pure cotton yarn or a second heat-generating blended yarn.

[0055] The use of cotton fibers in the blended yarn of this setting allows the wearer to stay warm while enjoying good air circulation, avoiding excessive stuffiness and discomfort, and also increasing the softness of the fabric and improving the comfort of the wearer; the heating polyester yarn can give the fabric light-absorbing and radiating properties, and can maintain the stability of the fabric, making the fabric less likely to deform, and the fabric can maintain continuous thermal insulation. The blended yarn of this setting has a certain shape stability, can adapt to deformation to a certain extent, and at the same time, has light-absorbing and heat-generating properties. The fabric made of this blended yarn has good wrinkle resistance, shape retention, and thermal insulation, while not losing softness and comfort.

[0056] Specifically, the pattern of the fabric is a nine-way cycle, and the order from bottom to top is as follows:

[0057] The organization structure of the first route is needle cylinder floating thread organization, needle cylinder floating thread organization, and needle cylinder tucking organization in sequence;

[0058] The organization structures of the second, fifth, and eighth routes are respectively needle-circle organization, needle-circle organization, and needle-circle organization;

[0059] The organizational structures of the third, sixth, and ninth routes are respectively syringe small circle organization, syringe small circle organization, and syringe small circle organization;

[0060] The organization structure of the fourth route is needle float organization, needle tuck organization, and needle float organization;

[0061] The seventh-route organization structure is, in sequence, a needle tuck organization, a needle float organization, and a needle float organization.

[0062] The fabric woven by this setting is a flannel fabric, which is not only fluffy and warm, but also has good shape retention. It is not easy to deform even when subjected to external forces and has good shape stability.

[0063] Specifically, the second route, the fifth route, and the eighth route are woven into a surface layer, the third route, the sixth route, and the ninth route are woven into a middle layer, and the fourth route and the seventh route are woven into an inner layer.

[0064] Specifically, the yarn count of the first heat-generating blended yarn is 20-40S, and preferably, the yarn count of the first heat-generating blended yarn is 30S.

[0065] Specifically, the thickness of the heating polyester yarn is 50-150D, and the F number of the heating polyester yarn is 36-72F. Preferably, the heating polyester yarn is 100D / 72F.

[0066] Preferably, the inner layer is woven from a second heat-generating blended yarn, and the yarn count of the second heat-generating blended yarn is 10S.

[0067] Preferably, the first heat-generating blended yarn and the second heat-generating blended yarn have the same composition.

[0068] Specifically, the first heat-generating blended yarn is composed of cotton fiber and heat-generating polyester yarn, wherein, according to the weight ratio, cotton fiber: heat-generating polyester yarn = 20~70:80~30, preferably, cotton fiber: heat-generating polyester yarn = 60:40, and the heat-generating polyester yarn is composed of polyester fiber and light-absorbing heat-generating material, wherein, according to the weight ratio, polyester fiber: light-absorbing heat-generating material = 97~99.5:3~0.5. Preferably, polyester fiber: light-absorbing heat-generating material = 98:2.

[0069] In this setting, the weight ratio of cotton fiber to heat-generating polyester yarn is controlled to ensure that the fabric maintains a balance of softness, fluffiness, shape retention and heat retention.

[0070] Specifically, the preparation process of the first heat-generating blended yarn or the second heat-generating blended yarn is:

[0071] Step 1: Add the light-absorbing and heat-generating material into the polyester fiber and mix to obtain a first mixture, and melt-spin the first mixture to obtain nascent fibers; wherein the melt-spinning temperature is 150-260°C.

[0072] Step 2: stretching, heat setting, washing and drying the spun fibers at one time to obtain heat-generating polyester filaments;

[0073] Specifically, the tensile strength of the heating polyester yarn is 2.1-5.1 cN / dtex, and the elongation at break is 25-45%.

[0074] Specifically, the heat setting temperature is 100-200°C, and the drying temperature is 80-105°C.

[0075] Step 3: Cut the heating polyester yarn into 3-4 cm pieces and blend it with cotton fiber to obtain the first heating blended yarn or the second heating blended yarn.

[0076] Specifically, the light-absorbing heat-generating material is a nano powder, and the light-absorbing heat-generating material is one of olefin earth, graphene, and ceramic powder. Preferably, the light-absorbing heat-generating material is ceramic powder.

[0077] Preferably, the inner layer is woven from second heating cotton yarn, and the yarn count of the entire second heating cotton yarn is 10S.

[0078] Specifically, the coil length of the second, fifth, and eighth wiring is 19-23 cm / 50 needles, the coil length of the third, sixth, and ninth wiring is 14-18 cm / 50 needles, and the coil length of the first, fourth, and seventh wiring is 8-12 cm / 50 needles. Preferably, the coil length of the second, fifth, and eighth wiring is 21 cm / 50 needles, the coil length of the third, sixth, and ninth wiring is 15 cm / 50 needles, and the coil length of the first, fourth, and seventh wiring is 9 cm / 50 needles.

[0079] This setting further increases the fluffiness of the fabric and improves the warmth retention of the fabric.

[0080] Specifically, the fabric weight is 250~350g / m2. Example 2

[0081] This embodiment provides a method for preparing a light-absorbing, heat-generating, thermal-insulating knitted fabric, comprising the following steps:

[0082] S1. Yarn count preparation: using the preferred yarn in Example 1.

[0083] S2, weaving; using the weaving structure of Example 1;

[0084] S3, pre-processing;

[0085] Specifically, the specific steps of pre-treatment are to subject the woven fabric to heat setting treatment at a temperature of 155-165°C for 1-2 minutes, preferably 160°C for 1.5 minutes. The heat setting treatment avoids collapse of the surface layer, middle layer and inner layer, improves the stability of the fabric, is conducive to dyeing, and avoids the problem of fiber damage and reduced thermal insulation performance of the fabric due to excessive temperature.

[0086] S4, dyeing treatment;

[0087] Specifically, the pre-treated fabric is immersed in a dyeing solution with a disperse dye formula of 2.5-3% dye, 2-3g / L leveling agent, 1.5-3g / L chelating dispersant, 3-5g / L sodium acetate, 2-2.5g / L anti-wrinkle agent and HAc (pH 4.5-5) at a bath ratio of 1:10, and the dyeing is performed in sections with temperature control, and the dyeing is followed by washing, dehydration and drying;

[0088] Specifically, the temperature control is as follows: from room temperature to 50°C at 0.5°C / min, keep warm for 15 minutes, then continue to heat up to 70°C at 0.5°C / min, keep warm for 40-50 minutes, then continue to heat up to 120°C at 0.5°C / min, keep warm for 40-50 minutes, and then cool down to 70°C at 0.85°C / min.

[0089] The setting of segmented heating improves the dyeing effect of fabrics.

[0090] S5, finishing:

[0091] S51, soft finishing;

[0092] Specifically, the dyed fabric is immersed in a softening liquid according to a bath ratio of 1:10 for finishing, and the softening liquid adopts the finishing agent in Example 1 of CN109208335 B; this setting improves the softness of the fabric and is more conducive to napping.

[0093] S52, drying;

[0094] Specifically, the drying temperature is 80-120°C, and the drying time is 2-4 minutes. Preferably, the drying temperature is 100°C, and the drying time is 4 minutes. This setting maintains the stability of the fabric during the napping treatment and improves the napping effect.

[0095] S53, roughening treatment;

[0096] Specifically, a double-action raising machine is used, and the raising cylinder is equipped with two types of needle rollers, clockwise and counterclockwise, which are arranged in sequence. The clockwise roller has the same movement direction as the fabric and plays a role of raising the hair, and the counterclockwise roller has the opposite movement direction of the fabric and plays a role of pulling the hair. By adjusting the speed of the fabric or the speed of the clockwise and counterclockwise rollers, different effects of raising the hair and pulling the hair can be achieved; the front side is pulled 2 to 3 times, and the back side is pulled 3 to 4 times. Preferably, the front side is pulled 2 times and the back side is pulled 3 times.

[0097] This setting forms a layer of fine fluff on the surface of the fabric, increasing the fluffiness of the fabric, thereby increasing the softness and warmth of the fabric.

[0098] S54, shaping treatment;

[0099] Specifically, the setting temperature is 150-160°C, the overfeed is 10-20%, and the speed is 15-35 m / min. Preferably, the setting temperature is 155°C, the overfeed is 15%, and the speed is 20 m / min.

[0100] This setting maintains the stability of the fabric during shearing and improves the shearing effect.

[0101] S55, shearing treatment;

[0102] Specifically, the cloth speed of the shearing process is 5-15 m / min, and the knife speed is 800-1000 RPM. Preferably, the cloth speed is 10 m / min, and the knife speed is 900 RPM.

[0103] S56, re-shaping process.

[0104] Specifically, the resetting temperature is 130-150°C, the overfeed is 15-30%, and the speed is 15-35 m / min. Preferably, the resetting temperature is 140°C, the overfeed is 20%, and the speed is 25 m / min.

[0105] Comparative Example 1

[0106] Cotton standard interlining as specified in GB / T 7568.2.

[0107] The fabrics of Example 2 and Comparative Example 1 were washed 30 times and then tested for light absorption and heat generation performance. Test method: Appendix B of T / GDBX 012-2019, temperature rise value calculation: 20-minute temperature rise value = 20th minute temperature - initial temperature; 20-minute temperature difference = 20th minute test sample temperature - 20th minute comparative example 1 sample temperature test results are shown in Table 1 below.

[0108]

[0109] It can be concluded from Table 1 that the fabric of the present invention is washed 30 times and then subjected to a light absorption and heating performance test, and the fabric still maintains a good thermal insulation rate. It can be seen that the present invention weaves the first heating blended yarn into the surface layer, the heating polyester yarn into the middle layer, and the second heating blended yarn into the inner layer, and at the same time cooperates with the weaving structure and the preparation process of the fabric, so that the fabric maintains a good thermal insulation effect and is resistant to water washing; moreover, the middle layer uses the heating polyester yarn, which also allows the fabric to maintain a certain stiffness, making the fabric resistant to water washing and visible.

[0110] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A light-absorbing, heat-generating, thermal-insulating knitted fabric, characterized in that: It comprises a surface layer, a middle layer and an inner layer. The surface layer is woven from a first heating blended yarn, the middle layer is woven from heating polyester yarn, and the inner layer is woven from pure cotton yarn or a second heating blended yarn.

2. The fabric according to claim 1, characterized in that: The pattern of the fabric is a nine-way cycle, and the order from bottom to top is as follows: The organization structure of the first route is needle cylinder floating thread organization, needle cylinder floating thread organization, and needle cylinder tucking organization in sequence; The organization structures of the second, fifth, and eighth routes are respectively needle-circle organization, needle-circle organization, and needle-circle organization; The organizational structures of the third, sixth, and ninth routes are respectively syringe small circle organization, syringe small circle organization, and syringe small circle organization; The organization structure of the fourth route is needle float organization, needle tuck organization, and needle float organization; The seventh-route organization structure is, in sequence, a needle tuck organization, a needle float organization, and a needle float organization.

3. The fabric according to claim 2, characterized in that: The second, fifth and eighth routes are woven into a surface layer, the third, sixth and ninth routes are woven into a middle layer, and the fourth and seventh routes are woven into an inner layer.

4. The fabric according to claim 1, characterized in that: The thickness of the first heating blended yarn is 20-40S.

5. The fabric according to claim 1, characterized in that: The thickness of the heating polyester yarn is 50-150D.

6. The fabric according to claim 1, characterized in that: The thickness of the pure cotton yarn or the second heating blended yarn is 5-12S.

7. The fabric according to claim 1, characterized in that: The first heating blended yarn and the second heating blended yarn are both composed of heating polyester yarn and cotton fiber.

8. A method for preparing a light-absorbing, heat-generating, thermal-insulating knitted fabric, used for preparing the fabric according to any one of claims 1 to 7, characterized in that: The steps include: S1, yarn preparation; S2, weaving; S3, pre-treatment; S4, dyeing; S5, finishing.

9. The preparation method according to claim 8, characterized in that: Step S5 includes the following steps: S51, softening finishing; S52, drying; S53, napping treatment; S54, shaping treatment; S55, shearing treatment; S56, reshaping treatment.

10. The preparation method according to claim 8, characterized in that: In step S3, the pretreatment is specifically to perform heat setting treatment on the woven fabric, the heat setting treatment temperature is 155-165°C, and the time is 1-2 minutes.

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