A knitted fabric

Abstract

The present application discloses a kind of knitted fabric.The fabric at least includes surface and inside, the surface tension γs of the fabric and the surface tension γL of liquid satisfy the relationship formula: γs / γL<1;And in a complete organization cycle, more than 30% of the loop on the surface of the fabric is formed by yarn A with inorganic particle content more than 8.0%, and the weight of the yarn A accounts for more than 30% of the total weight of the fabric;And the filament fineness X of surface layer yarn and the filament fineness Y of inner layer yarn satisfy the relationship formula: X / Y>1.00.The knitted fabric of the present application, even in the case of being completely soaked by rain or sweat, is relatively kept in dry state, the surface color change can reach more than 4 levels, and has durable water stain proofing effect, and can be widely used in shirts, casual clothes, sports T-shirts, golf clothes and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to a knitted fabric, in particular to a knitted fabric which is not easy to see water stains on the surface of the fabric after the human body sweats or the surface of the fabric is wetted by water. BACKGROUND

[0002] With the development of society, people have higher and higher requirements for clothing fabrics. While focusing on the functional requirements such as moisture absorption and quick drying, people hope that the fabric has the effect of preventing liquid water stains such as sweat stains and rainwater stains. For example, in the case of high temperature in summer, easy to sweat a lot or suddenly encounter heavy rain, the surface of the fabric is easy to appear obvious water stain spots. These water stain spots will make people feel embarrassed, and even affect the normal play of people's mood and ability, so the development of water stain resistant fabric is imminent.

[0003] For example, patent document CN205741454U discloses a sweat stain resistant fabric structure, which includes an inner layer and an outer layer. The inner layer includes a base body and a protruding structure arranged on the surface of the base body. The structure gives the fabric moisture absorption, sweat wicking and reduced wet cold feeling. The outer layer adopts water-repellent polyester filament, but the sweat stain resistant effect of the fabric surface is not satisfactory due to the hole structure of the outer layer of the fabric.

[0004] For example, patent document CN107627688A discloses a sweat stain resistant fabric, which includes a light and thin breathable layer of a surface layer, a breathable and moisture absorbing layer of an intermediate layer, and a close-fitting breathable layer of a lower layer. The light and thin breathable layer of the surface layer is woven by mixing polyester fibers and pure linen fine spinning fibers. Although this design can promote the rapid evaporation of sweat, when the human body secretes a lot of sweat, the sweat quickly conducts to the surface of the fabric, and the sweat is easy to gather on the surface of the fabric, so the sweat stain resistant effect is not good.

[0005] For example, patent document CN105734772A discloses a sweat stain resistant fabric and a production method. Although more than 60% of the yarns forming the fabric are titanium dioxide containing 3-7% of core-sheath structure, the total content of titanium dioxide is low, although the fabric has good sweat stain resistant effect and anti-ultraviolet effect, but the sweat stain resistant effect is poor. SUMMARY

[0006] The purpose of the present application is to provide a knitted fabric with excellent water stain resistant effect and excellent durability.

[0007] In order to achieve the above purpose, the technical solution of the present application is as follows:

[0008] The knitted fabric of the present application at least includes a surface and an inside, the surface tension γ s of the fabric L satisfies the following relationship: γ s / γL <1; and more than 30% of the loops on the surface of the fabric are formed by the yarn A with an inorganic particle content of more than 8.0% by weight in one complete fabric cycle, and the weight of the yarn A accounts for more than 30% of the total weight of the fabric; and the filament fineness X of the yarn on the surface of the fabric and the filament fineness Y of the yarn inside the fabric satisfy the following relationship: X / Y>1.00.

[0009] The knitted fabric of the present application is relatively dry even in the case of being completely soaked by sweat or rain, the color change of the surface of the fabric can reach more than 4 levels, and has excellent water stain prevention effect no matter how many times it is washed, and can be widely used in shirts, casual clothes, sports T-shirts, golf clothes and the like. DETAILED DESCRIPTION

[0010] The knitted fabric of the present application has excellent water stain prevention effect. The water stain prevention effect here refers to that the water mark on the surface of the fabric is not easy to be seen, that is, the sweat secreted by the human body is not easy to be conducted to the surface layer of the fabric by the inner layer of the fabric, and that the water droplets outside cannot wet the surface of the fabric, and the color change of the surface of the fabric is small. Here, the surface refers to the opposite side in contact with the skin.

[0011] The water stain prevention effect of the present application is mainly achieved by the following means: (1) reducing the water droplets on the surface of the fabric; (2) the visual color change of the surface of the fabric before and after wetting is small. In order to obtain excellent water stain prevention effect, the following aspects are considered: on the one hand, when the fabric is in contact with water, the water droplets on the surface are affected by the internal force of the water and the external effect of the fabric on the water, and the difference in the size of the two forces causes the water to present different states on the surface of the fabric, that is, the fabric is hydrophilic and the fabric is hydrophobic. From the microscopic point of view, due to the difference in surface tension, water molecules form a contact angle on the surface of the fabric, which can be used to characterize the wetting degree of the fabric surface. When the surface tension of the fabric is less than the surface tension of water, the contact angle is greater than 90°, and the fabric surface shows the characteristics of hydrophobicity, so the surface color change is small. On the other hand, due to the difference in fineness between the surface and inner yarns of the fabric, capillary effect is generated, so that water is not easy to be conducted from the inside of the fabric to the surface of the fabric, and therefore the surface color change is small. Furthermore, inorganic particles have a scattering effect on light, and the addition of inorganic particles in the fibers of the fabric increases the reflection interface of light in the interior of the fibers, so that the color change of the surface of the fabric before and after wetting is small.

[0012] First, when γ s / γ L >1, the contact angle of water on the surface of the fabric is less than 90°, at this time the fabric surface is in a hydrophilic state, the water droplets easily wet the fabric surface, the water stain is obvious, and the amount of reflected light changes greatly before and after wetting, the fabric color looks deep, and the water stain prevention effect is poor. When γ s / γ L= 1, the contact angle of water on the surface of the fabric is equal to 90°, the water droplet is at the interface of wetting and non-wetting on the surface of the fabric, and the waterproof stain effect is poor. When γ s / γ L < 1, the contact angle of water on the surface of the fabric is greater than 90°, at this time the surface of the fabric is in a water-repellent state, the water droplet is almost unable to wet the surface of the fabric, the water mark is small, the light reflection of the surface of the fabric is basically the same as the dry state, the color of the surface of the fabric is almost unchanged, and the waterproof stain effect is good. Therefore, the surface tension γ s of the surface of the fabric and the surface tension γ L of the liquid satisfy the relationship: γ s / γ L < 1.

[0013] Secondly, the single filament fineness X of the surface yarn and the single filament fineness Y of the inside yarn satisfy the following relationship: X / Y > 1.00. When the single filament fineness X of the surface yarn is greater than the single filament fineness Y of the inside yarn, the fineness difference is generated between the surface and the inside of the fabric, considering the capillary effect, the sweat absorbed by the inside is not easy to transfer to the surface of the fabric, the color change of the surface of the fabric is small, and the waterproof stain effect is good. If the single filament fineness X of the surface is less than the single filament fineness Y of the inside, the sweat absorbed by the inside is easy to transfer to the surface of the fabric, the liquid is gathered on the surface of the fabric, the color change of the surface of the fabric is large, and the waterproof stain effect is poor. The greater the fineness difference between the surface and the inside yarns, the more obvious the capillary effect of the fabric.

[0014] Furthermore, the inorganic particles have a scattering effect on light, can hinder the transmission of light, and reduce the light transmittance. After adding the inorganic particles in the fiber, the reflection interface of light is increased in the inside of the fiber. Under the condition of the same amount of incident light, the color change of the fabric wetted by the fabric with a high inorganic particle content is small before and after wetting. In a complete organizational cycle, the yarn A with an inorganic particle content of 8.0% by weight is used for knitting on the surface of the fabric. When the inorganic particle content in the yarn A is less than 8.0% by weight, the light reflectance of the fabric decreases too much after wetting, the color change is obvious, and the waterproof stain effect is poor. When the inorganic particle content in the yarn A is greater than 20.0% by weight, the inorganic particles are easy to agglomerate, leading to poor spinnability of the yarn, and even spinning difficulty. Even after the fabric is knitted, the fabric will produce mottling after dyeing, affecting the quality of the fabric. Therefore, the yarn A is the yarn with an inorganic particle content of 8.0% by weight, and the yarn with an inorganic particle content of 8.0-20.0% by weight is preferred.

[0015] In one complete knitting cycle of the fabric of the present application, more than 30% of the loops on the surface of the fabric are formed by the yarn A. When the loops on the surface of the fabric formed by the yarn A are less than 30%, the proportion of the yarn A in the surface layer of the fabric is low, and the content of the inorganic particles on the surface of the fabric is low, the amount of reflected light before and after wetting changes greatly, and the color looks darker, and the water stain prevention effect is poor. Considering that the color change of the fabric after wetting is small, the proportion of the loops on the surface of the fabric formed by the yarn A is preferably 100%.

[0016] In the present application, the weight of the yarn A accounts for more than 30% of the total weight of the fabric, and when it is mixed with other yarns, it can ensure good water mark prevention effect of the fabric, and preferably accounts for more than 40% of the total weight, and more preferably accounts for 100% of the total weight.

[0017] As a preferred embodiment, the water-repellent resin attached to the surface of the fabric of the present application is a fluorocarbon water-repellent and oil-repellent resin and / or a non-fluorine water-repellent resin. Such water-repellent finishing resin has good water-repellent effect and good durability, so that the surface of the fabric is continuously water-repellent, and has good water stain prevention effect.

[0018] As a preferred embodiment, the total fineness of the yarns on the surface of the fabric of the present application α and the total fineness of the yarns inside β satisfy the relationship: 0.10<α / β<8.00. When α / β≤0.10, the total fineness of the surface yarns is too small compared with the inside yarns, and after being knitted into a fabric, the inside yarns will be prominent on the surface of the fabric, and the color change of the surface of the fabric after wetting is large. When α / β≥8.00, knitting problems caused by the mismatch between the fineness of the yarns and the needle pitch of the machine are prone to occur, such as needle breakage, yarn breakage, etc.

[0019] As a preferred embodiment, the inorganic particles in the yarn A of the present application are microparticles with a refractive index of 1.80 or more. When the refractive index of the inorganic particles is less than 1.80, the inorganic particles have less hindering effect on the transmission of light, and the amount of transmitted light is relatively large, the amount of reflected light before and after wetting changes greatly, the color looks darker, and the sweat stain prevention effect is poor.

[0020] The type of inorganic particles on the surface of the fabric is not particularly limited, and can be one or more of titanium dioxide, aluminum sesquioxide, antimony sesquisulfide, zirconium oxide, cadmium red, calcium oxide, etc.; or colored particles such as white, red, blue, etc.

[0021] The color difference between the water-wet state and the dry state of the fabric of the present application is evaluated by visual method as 4 levels or more. The water-wet state here refers to the state after the sample is placed in a standard atmosphere for 24 hours, then 0.20 ml of water is dropped on the inner layer, and after 1 min, the water is completely absorbed by the fabric (no obvious liquid water droplets, no mirror reflection). The dry state here refers to the state after the sample is placed in a standard atmosphere for 24 hours.

[0022] The fiber raw material forming the yarn of the present application is not particularly limited, such as polyester (PET), polyamide, viscose, etc. The cross-sectional shape of the fiber is not particularly limited, and can be circular, triangular, cruciform, or the like.

[0023] In the process of manufacturing the fabric of the present application, the loop ratio and weight ratio of the yarn A on the surface of the fabric can be controlled by adjusting the yarn ratio of the yarn A and other yarns. The waterproof effect on the surface of the fabric can be obtained by selecting waterproof resin processing according to needs in post-finishing, or selecting a yarn with waterproof function (surface coated with waterproof resin) during weaving. Among them, the waterproof resin can be fluorocarbon waterproof and oil-proof resin, or fluorine-free waterproof resin; or both can be used at the same time.

[0024] The following examples can enable those skilled in the art to more fully understand the present application, but the present application is not limited in the scope of the examples.

[0025] The test method of each parameter involved in the present application is as follows:

[0026] (1) Sweat stain prevention rating (visual method)

[0027] ① Two 5cm x 5cm samples were cut from a flat and wrinkle-free sample and placed in a standard atmospheric pressure humidity balance for 24 hours.

[0028] ② One of the samples was initially weighed, then soaked in tertiary water for 60 seconds, then taken out and naturally dropped until no water dripped, and then placed in a balance. The water content of the fabric was calculated.

[0029] ③ When the water content of the fabric is greater than or equal to 100%, the wet fabric is placed on the test platform, and the other sample (dry state) is placed side by side in the standard light source color matching lamp box, and the gray card is also placed on the same plane, and the color difference of the fabric is evaluated according to GB T 250-2008 Textile Color Difference Evaluation.

[0030] ④ Select D65 light source for color matching, the incident light is about 45° angle with the surface of the fabric, the observation direction is perpendicular to the surface of the fabric, and the color difference of the two samples is visually evaluated by the difference between the five gray cards. When the color difference of the two samples is equivalent to the perceived color difference of a certain level of gray card, it is considered as the level of color difference of the present application. When there is no perceived color difference, it is considered as level 5. When the color difference of the two samples is between two adjacent levels of gray card, it can be considered as an intermediate level, such as level 4-5.

[0031] ⑤Take two 5cm x 5cm samples without wrinkles, put them into the washing machine, and wash and dry them according to GBT 8629-2017 "Household washing and drying procedures for testing textiles" for 10 times (L10). After the samples are dried, repeat steps ①-④ above, and evaluate the color difference grade of the samples according to step ④.

[0032] (2) Calculation of fabric surface tension and liquid surface tension

[0033] Test according to ISO 19403-5-2017 international standard (part 5).

[0034] (3) Calculation of fabric surface waterproof resin content

[0035] Select a fabric with an area of 10cm x 10cm, weigh its mass as a. Select an appropriate solvent to dissolve the fibers that form the fabric, dry the undissolved waterproof resin, and measure the mass of the waterproof resin in the dry state as b. The content of the waterproof resin on the surface of the fabric can be calculated as b / a x 100%. The solvent is selected according to the type of fiber and the type of waterproof resin.

[0036] (4) Inorganic particle content in yarn

[0037] Take about 4g of the corresponding yarn, melt and sample, determine the content of metal elements in it by X-ray fluorescence spectrometer (manufacturer: Rigaku, model: ZSXPrimus III+), and then calculate the content of inorganic particles in the yarn by molecular formula.

[0038] (5) Refractive index determination of inorganic particles

[0039] Select 100g of fabric, select an appropriate solvent to dissolve the fibers that form the yarn, dry, extract inorganic particles (1g) from the fibers, analyze the chemical composition of the inorganic particles according to elemental analysis method, and determine the refractive index of the inorganic particles. The solvent is selected according to the type of fiber, such as: phenol and tetrachloroethylene mixed solution for polyester fiber, formic acid solution for polyamide fiber, concentrated sulfuric acid for viscose fiber, etc.

[0040] Example 1

[0041] The surface yarn selects PET DTY of 90D / 12f as yarn A, the inner layer yarn selects PET DTY of 50D / 36f as yarn B, uses 28 needle single side circular knitting machine, adopts polyester cover cotton organization to weave to obtain the gray cloth, wherein the loop proportion of yarn A on the surface of the fabric is 100%, the weight of yarn A accounts for 100% of the total weight of the fabric, and yarn A is a PET yarn containing 8.5% by weight of titanium dioxide particles with a refractive index of 2.55. The gray cloth is treated by refining + dyeing in one bath (refining agent 1g / L, dispersing dye dosage 3%o.w.f, temperature 130℃*30min)→surface waterproof resin processing (fluorocarbon waterproof agent)→shaping engineering treatment, to obtain the fabric of the application, the grammage is 170g / m 2 , see table 1 for specific parameters.

[0042] Example 2

[0043] Replace the PET DTY yarn of 90D / 12f in example 1 with PET DTY of 450D / 60f, replace the PET DTY of 50D / 36f with PET DTY of 85D / 60f, and the rest is the same as example 1, to obtain the fabric of the application, the grammage is 148g / m 2 , see table 1 for specific parameters.

[0044] Example 3

[0045] Replace the surface yarn A with PET yarn containing 8.5% by weight of aluminum oxide inorganic particles with a refractive index of 1.76. The rest is the same as example 1, to obtain the fabric of the application, the grammage is 112g / m 2 , see table 1 for specific parameters.

[0046] Example 4

[0047] Replace yarn A with the same specification yarn with waterproof function, and the fabric does not undergo surface waterproof resin processing, and the rest is the same as example 1, to obtain the fabric of the application, the grammage is 108g / m 2 , see table 1 for specific parameters.

[0048] Example 5

[0049] Knit the gray cloth on the double-sided machine with double-sided cotton wool organization, yarn A and yarn B are arranged according to odd-even road, adjust the exposure proportion of the loop of yarn A on the surface, the loop proportion of yarn A on the surface of the fabric is 50%, and the weight of yarn A accounts for 50% of the total weight of the fabric. The rest is the same as example 1, to obtain the fabric of the application, the grammage is 126g / m 2 , see table 1 for specific parameters.

[0050] Example 6

[0051] The fabric is knitted on a double needle bed machine with double jersey stitch, yarn A and yarn B are arranged in a ratio of 3:7, the exposure ratio of the loops of yarn A on the surface is adjusted, the loop ratio of yarn A on the surface of the fabric is 30%, and the weight of yarn A accounts for 30% of the total weight of the fabric. The rest is the same as in Example 1, and the fabric of the application is obtained, and the grammage thereof is 134 g / m 2 , and specific parameters are shown in Table 1.

[0052] Example 7

[0053] The 90D / 12f PET DTY yarn in Example 1 is replaced by 450D / 60f PET DTY. The rest is the same as in Example 1, and the fabric of the application is obtained, and the grammage thereof is 128 g / m 2 , and specific parameters are shown in Table 1.

[0054] Example 8

[0055] The 50D / 36f PET DTY in Example 3 is replaced by 50D / 24f PET DTY. The rest is the same as in Example 1, and the fabric of the application is obtained, and the grammage thereof is 126 g / m 2 , and specific parameters are shown in Table 1.

[0056] Comparative Example 1

[0057] The fabric is knitted on a double needle bed machine with double jersey stitch, yarn A and yarn B are arranged in a ratio of 1:4, the loop ratio of yarn A on the surface of the fabric is 20%, and the weight of yarn A accounts for 20% of the total weight of the fabric. The rest is the same as in Example 1, and the fabric of the application is obtained, and the grammage thereof is 112 g / m 2 , and specific parameters are shown in Table 1.

[0058] Comparative Example 2

[0059] The surface yarn A is a PET yarn containing 5.0% by weight of titanium dioxide particles with a refractive index of 2.55. The rest is the same as in Example 1, and the fabric of the application is obtained, and the grammage thereof is 147 g / m 2 , and specific parameters are shown in Table 1.

[0060] Comparative Example 3

[0061] The fabric is not subjected to surface waterproof resin processing. The rest is the same as in Example 6, and the fabric of the application is obtained, and the grammage thereof is 138 g / m 2 , and specific parameters are shown in Table 1.

[0062] Comparative Example 4

[0063] The PET DTY of 90D / 12f is replaced by the PET DTY of 450D / 60f, and the PET DTY of 50D / 36f is replaced by the PET DTY of 250D / 24f. The rest is the same as in Example 3 to obtain the fabric of the application, which has a grammage of 122 g / m 2 The specific parameters are shown in Table 1.

[0064] Table 1

[0065]

[0066] According to Table 1,

[0067] (1) As can be seen from Example 1 and Example 5, under the same conditions, the knitted fabric in which the loop proportion of yarn A on the surface of the fabric is 100% and the proportion of yarn A in the weight of the fabric is 100% has a smaller color difference than the knitted fabric in which the loop proportion of yarn A on the surface of the fabric is 50% and the proportion of yarn A in the weight of the fabric is 50%, i.e., the waterproof stain effect of the former is better than that of the latter.

[0068] (2) As can be seen from Example 1 and Example 4, under the same conditions, the knitted fabric with waterproof resin on the surface of the fabric has a smaller color difference than the knitted fabric without waterproof resin on the surface of the fabric, i.e., the waterproof stain effect of the former is better than that of the latter.

[0069] (3) As can be seen from Example 2 and Example 7, under the same conditions, the knitted fabric in which the total fineness ratio of the surface yarns is 5.29 has a smaller color difference than the knitted fabric in which the total fineness ratio of the surface yarns is 9.00, i.e., the waterproof stain effect of the former is better than that of the latter.

[0070] (4) As can be seen from Example 1 and Example 3, under the same conditions, the knitted fabric in which the refractive index of the inorganic particles in the surface yarn A is 2.55 has a smaller color difference than the knitted fabric in which the refractive index of the inorganic particles in the surface yarn A is 1.76, i.e., the waterproof stain effect of the former is better than that of the latter.

[0071] (5) As can be seen from Example 6 and Comparative Example 1, under the same conditions, the knitted fabric in which the loop proportion of yarn A on the surface of the fabric is 30% and the proportion of yarn A in the weight of the fabric is 30% has a smaller color difference than the knitted fabric in which the loop proportion of yarn A on the surface of the fabric is 20% and the proportion of yarn A in the weight of the fabric is 20%, i.e., the waterproof stain effect of the former is better than that of the latter.

[0072] (6) As can be seen from Example 1 and Comparative Example 2, under the same conditions, the knitted fabric in which the content of inorganic particles on the surface of the fabric is 8.5% by weight has a smaller color difference than the knitted fabric in which the content of inorganic particles on the surface of the fabric is 5.0%, i.e., the waterproof stain effect of the former is better than that of the latter.

[0073] (7) From Example 8 and Comparative Example 4, under the same conditions, the knitted fabric with a single filament fineness ratio X / Y of 3.57 has a smaller color difference than the knitted fabric with a single filament fineness ratio X / Y of 0.72, and the waterproof stain effect of the former is better than that of the latter.

Claims

1. A knitted fabric, comprising at least a surface and an inner layer, characterized in that: a. The surface tension γ of the fabric s Surface tension γ of the liquid L Satisfy the following relationship: γ s / γ L <1; b. In a complete fabric cycle, more than 30% of the loops on the fabric surface are formed by yarn A with an inorganic particle content of 8.0 to 20.0% by weight, and the weight of yarn A accounts for more than 30% of the total weight of the fabric. c. The fineness X of the surface yarn and the fineness Y of the inner yarn satisfy the following relationship: X / Y>1.00; d. The inorganic particles are microparticles with a refractive index of 1.80 or higher.

2. The knitted fabric according to claim 1, characterized in that: The surface of the fabric is coated with a waterproof resin, and the waterproof resin is a fluorocarbon waterproof and oil-repellent agent and / or a fluorine-free waterproof resin.

3. The knitted fabric according to claim 1 or 2, characterized in that: Within a complete fabric cycle, 100% of the loops on the surface of the fabric are formed by yarn A.

4. The fabric according to claim 1 or 2, characterized in that: The total fiber content of the yarn on the surface The degree α and the total fineness β of the yarn inside satisfy the following relationship: 0.10 < α / β < 8.00.

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