A dimensionally stable and elastic warp knitted fabric for medical inner wear and a preparation method thereof

Abstract

The present invention discloses a dimensionally stable and elastic warp knitted fabric for medical inner wear and a preparation method thereof. The fabric comprises in sequence a first filament coil layer; a second filament coil layer; a base layer; a first filament extension line layer; and a second filament extension line layer. The fabric of the present invention is comfortable and durable, has good elasticity, extensibility and breathability; has a stable structure, a flat surface, and is anti-see-through; has durable antibacterial, antistatic, moisture absorption and quick drying functions; can withstand high-temperature chlorine bleaching disinfection in hospitals, has good dimensional stability, and is not easy to wrinkle; does not contain short fiber yarns, does not produce flying catkins, and can be used in all occasions including operating rooms.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical equipment, and in particular relates to a dimensionally stable and elastic warp-knitted fabric for medical inner wear and a preparation method thereof. Background Art

[0002] Doctors are a highly professional profession, and their dress etiquette also reflects their professionalism. Currently, most medical underwear is made of woven fabrics, which were first introduced into this field because of their long history. Their main advantages are stable structure, flat surface, anti-see-through, good drape, and convenient for various processing and finishing; their disadvantages are poor elasticity, poor extensibility, and poor breathability. Woven fabrics only focus on the functions and washing characteristics of medical professionals, and cannot take into account the comfort and style of medical staff's clothing.

[0003] Warp knitting is a textile process in the field of knitting. It consists of one or several groups of parallel yarns that are fed into the loom in the warp direction, forming coils and interlacing with each other. Warp knitted fabrics have properties similar to woven fabrics, with a stable structure, a flat surface, and anti-see-through. At the same time, they have elasticity, extensibility, and breathability that woven fabrics lack. In addition, they have good dimensional stability, low shedding, and high production efficiency. Medical underwear developed with warp knitted fabrics not only have the functions and washing characteristics of woven fabrics, but also take into account the comfort and styling of medical staff's clothing, giving medical staff a comfortable, close-fitting, and non-tight experience.

[0004] In the prior patent application (CN202010332589.0 A medical fabric with high dimensional stability and its preparation method) of the researchers of the present utility model, the fabric involved is mainly used for the white coats worn by medical staff. As a kind of professional attire for doctors, medical inner clothing is generally worn close to the inside of the white coat and matched with the white coat. Unlike the solemnity of the white coat, this professional attire pays more attention to a good wearing experience. The fabric is required to be anti-see-through, moisture-absorbent and breathable, soft, comfortable and elastic. At the same time, medical fabrics need to be frequently disinfected by high-temperature chlorine bleaching, so there are also high requirements for the chlorine bleaching resistance, wrinkle resistance after washing and dimensional stability of the fabric. The fabric involved in the present utility model is an improvement on this basis that is suitable for inner clothing. Utility Model Content

[0005] The utility model aims to provide a functional inner garment fabric suitable for medical staff to wear.

[0006] The first aspect of the utility model is to disclose a dimensionally stable and elastic warp knitted fabric for medical inner wear, which comprises

[0007] a first filament coil layer;

[0008] a second filament coil layer;

[0009] Base layer;

[0010] a first filament extension line layer;

[0011] Second filament extension thread layer.

[0012] In some embodiments of the present invention, in the first filament coil layer, each yarn completes a reciprocating lateral movement in front of three or more knitting needles to form a coil.

[0013] In some embodiments of the present invention, in the second filament coil layer, each yarn completes a reciprocating lateral movement in front of the same knitting needle to form a coil.

[0014] In some embodiments of the present invention, in the base layer, each yarn completes a reciprocating lateral movement on the backs of two or more knitting needles to be inserted into the fabric without forming a loop.

[0015] In some embodiments of the present invention, the first filament extension line layer is continuous with the second filament coil layer, wherein each yarn completes a reciprocating lateral movement on the back of the corresponding same knitting needle to form an extension line.

[0016] In some embodiments of the present invention, the second filament extension line layer is continuous with the first filament coil layer, wherein each yarn completes a reciprocating lateral movement on the backs of corresponding three or more knitting needles to form an extension line.

[0017] In some embodiments of the present invention, the base layer is woven from first elastic filaments and conductive yarns, and the conductive yarns are woven from conductive filaments and second elastic filaments.

[0018] In some preferred embodiments of the present invention, the first elastic filaments and the second elastic filaments account for 10-25% (by mass) of all the yarns woven into the fabric.

[0019] In some preferred embodiments of the present invention, the number ratio of the first elastic filament to the conductive yarn is (20-35):1.

[0020] In some preferred embodiments of the present invention, the first elastic filament and the second elastic filament are polyester fibers, and the polyester fibers are selected from one or more of PBT, PTT, T400, T800, and SSY.

[0021] The second aspect of the utility model is to disclose a method for preparing the fabric described in the first aspect, comprising the following steps:

[0022] The filaments are sequentially strung into loops in a full-threading manner to form a first filament coil layer and a second filament coil layer;

[0023] The conductive yarn is formed by paralleling the conductive yarn and the second elastic filament, and the base layer is formed by full-threading the first elastic filament and the conductive yarn back and forth;

[0024] The first filament extension line layer is formed by the filaments being fully threaded back and forth in the same coil column;

[0025] The second filament extension line layer is formed by the filament being fully threaded through two or more coils in a longitudinal row in sequence;

[0026] in,

[0027] In the first filament coil layer, each yarn completes a reciprocating lateral movement in front of three or more knitting needles to form a coil.

[0028] In some embodiments of the present invention, in the second filament coil layer, each yarn completes a reciprocating lateral movement in front of the same knitting needle to form a coil.

[0029] In some embodiments of the present invention, in the base layer, each yarn completes a reciprocating lateral movement on the backs of two or more knitting needles to be inserted into the fabric without forming a loop.

[0030] In some embodiments of the present invention, the yarn in the first filament extension line layer is continuous with the yarn in the second filament coil layer, and each yarn completes a reciprocating lateral movement on the back of the corresponding same knitting needle to form an inner layer extension line.

[0031] In some embodiments of the present invention, the yarn in the second filament extension line layer is continuous with the yarn in the second filament coil layer, and each yarn completes a reciprocating lateral movement on the backs of corresponding three or more knitting needles to form an outer layer extension line.

[0032] In some embodiments of the present invention, the content of the first elastic filament and the second elastic filament in the fabric is determined by the following steps:

[0033] S1, the content ranges of the first elastic filament and the second elastic filament are preset to be (a1, b1) and (a2, b2), wherein a1 is 5-15%, b1 is 20-30%, a2 is 0.01-0.5%, and b1 is 1.0-1.5%;

[0034] S2, determine the first elastic filament is The content of the second elastic filament with the best elasticity in the fabric is O1, and the second elastic filament is determined to be The fabric with the best elasticity has a content of O2, and the elasticity of the fabric when O1 and O2 are compared. If O2>O1, the content range of the first elastic filament and the second elastic filament is determined to be , otherwise, the content range of the second elastic filament is determined to be ;

[0035] S3, repeat S2 until the content of the first elastic filament is less than 0.5%, and the middle value of the range is taken as the content of the first elastic filament and the second elastic filament.

[0036] In some embodiments of the present invention, the ambient humidity is controlled by PID during the weaving process of the fabric, and the PID is controlled by the following formula:

[0037]

[0038] Wherein, Δu(c) corresponds to the change in humidity within the time interval between two samplings; Kc is a constant, 20-30; f(C) is the deviation at the Cth sampling, f(C-1) is the deviation at the C-1th sampling, and f(C-2) is the deviation at the -2th sampling; T I is the integration time, 4-5 min; T D is the differential time, 1-3min; T S is the sampling period, 1-1.5s.

[0039] Beneficial technical effects of the utility model:

[0040] (1) The fabric of the utility model is comfortable and durable, and has good elasticity, extensibility and breathability;

[0041] (2) The fabric of the utility model has a stable structure, a smooth surface and is anti-see-through;

[0042] (3) The fabric of the utility model has the functions of durable antibacterial, antistatic, moisture absorption and quick drying;

[0043] (4) The fabric of the utility model can withstand high-temperature chlorine bleaching and disinfection in hospitals, has good dimensional stability, and is not easy to wrinkle;

[0044] (5) The fabric of the utility model does not contain short-staple yarns and does not produce flying catkins, and can be used in all occasions including operating rooms. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 This is a cross-sectional view of the fabric of the prior patent application CN202010332589.0;

[0046] Figure 2 A cross-sectional view of an embodiment of the fabric of the utility model;

[0047] Figure 3 This is a schematic diagram of the external structure of the fabric of the prior patent application CN202010332589.0;

[0048] Figure 4This is a schematic diagram of the external structure of an implementation method of the fabric of the utility model;

[0049] In the figure, 1 is a first filament coil layer, 2 is a second filament coil layer, 3 is a base layer, 4 is a first filament extension line layer, and 5 is a second filament extension line layer. DETAILED DESCRIPTION

[0050] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0051] Example 1

[0052] A dimensionally stable and elastic medical inner wear warp knitted fabric, comprising

[0053] a first filament coil layer;

[0054] a second filament coil layer;

[0055] Base layer;

[0056] a first filament extension line layer;

[0057] Second filament extension thread layer.

[0058] In this embodiment,

[0059] The first filament coil layer is formed by stringing the filaments into loops in sequence in a full-threading manner;

[0060] The second filament coil layer is formed by stringing the filaments into loops in sequence in a full-threading manner;

[0061] The base layer is formed by first elastic filaments and conductive yarns in a full-threading manner, wherein the conductive yarns are formed by paralleling conductive yarns and second elastic filaments, and the distance between any two conductive yarns is 1.5 cm to 2.1 cm;

[0062] The first filament extension line layer is formed by filaments being fully threaded back and forth in the same coil column and is continuous with the second filament coil layer;

[0063] The second filament extension line layer is formed by filaments being passed back and forth in sequence in a full-threading manner and is continuous with the first filament coil layer.

[0064] The first filament coil layer includes a plurality of first yarns, each of which completes a reciprocating lateral movement in front of a needle two knitting needles apart to form a first coil;

[0065] The second filament coil layer includes a plurality of second yarns, each of which moves back and forth in front of the same knitting needle to form a second coil;

[0066] The base layer includes a plurality of third yarns, each of which moves back and forth on the backs of two adjacent knitting needles to be inserted into the fabric without forming a loop;

[0067] The first filament extension line layer includes a plurality of fourth yarns, the fourth yarns are continuous with the second yarns, and each of the fourth yarns completes a reciprocating lateral movement on the back of the same knitting needle to form an inner layer extension line;

[0068] The second filament extension line layer includes a plurality of fifth yarns, which are continuous with the first yarns. Each of the fifth yarns completes a reciprocating lateral movement on the backs of two knitting needles to form an outer layer extension line.

[0069] like Figure 1 As shown, in the present invention, an improvement is made on the basis of the prior patent application (CN202010332589.0), and the base layer originally in the fourth layer is adjusted to the third layer, that is, the middle layer. This improvement makes the double-sided wrapping of the base layer better, and the front and back sides are not easily exposed, especially ensuring that the conductive fibers in the base layer are not easily exposed.

[0070] like Figure 1 , Figure 2 As shown, in the first filament coil layer, each yarn completes a reciprocating lateral movement in front of two knitting needles separated to form a coil. In the second filament coil layer, each yarn completes a reciprocating lateral movement in front of the same knitting needle to form a coil. In the base layer, each yarn completes a reciprocating lateral movement on the back of two adjacent knitting needles to be inserted into the fabric without forming a coil.

[0071] In this embodiment, an improvement is made on the basis of the prior patent application (CN202010332589.0), in which the coils formed by the same yarn in the first level (first filament coil layer) are changed from "adjacent" to "separated", that is, the occupied "needle positions" are increased from 2 to 3, increasing the length of the yarn in this layer, laying a good foundation for increasing the extensibility of the fabric. This improvement, in conjunction with the improvement of the second filament coil layer and the base layer, increases the extensibility of the fabric.

[0072] In this embodiment, an improvement is made on the basis of the prior patent application (CN202010332589.0), and the coils formed by the same yarn in the second level (the second filament coil layer) are changed from "separated" to "the same", that is, the "needle position" occupied is reduced from 3 needles to 1 needle, and the lateral restraint of the yarn in this layer is eliminated, so that the elastic filaments can give full play to their elasticity and ensure that the elasticity of the fabric is not constrained. This improvement cooperates with the improvement of the first filament coil layer and the base layer, and gives play to the elastic properties of the elastic filaments that replace the staple yarn in the base layer, thereby increasing the elasticity of the fabric.

[0073] In this embodiment, improvements are made on the basis of the prior patent application (CN202010332589.0). Elastic filaments are used instead of staple yarns in terms of material, and the original fourth layer of the base layer is adjusted to outside the third layer in terms of structure. The lining of the same yarn in the base layer is changed from "the same root" to "adjacent" in terms of weaving method, that is, the occupied "needle position" is increased from 1 needle to 2 needles, so as to achieve uniform distribution of elastic filaments between two adjacent columns of coils and realize comprehensive lateral elasticity with the shortest structure.

[0074] The researchers of the utility model found that the fabric of the prior patent application (CN202010332589.0) would produce flying catkins and was not suitable for use in operating rooms. After the above improvements in material and structure, the problem of flying catkins was solved, and the use of the fabric was expanded to all occasions including operating rooms. Moreover, the improvement in the weaving method, combined with the improvement in the weaving method of the second filament coil layer, better exerted the lateral elasticity of the elastic yarn.

[0075] Preferably, the conductive thread is made by blending or composite spinning conductive microparticles and high molecular polymers, and the specification of the conductive thread is 20-35D.

[0076] Preferably, in the base layer, the twist of the conductive yarn is 400-600 twists / m, and the ratio of the number of the conductive yarn to the number of the first elastic filaments is 1:20-1:35.

[0077] The first elastic filament and the second elastic filament do not include spun yarn, and the first elastic filament and the second elastic filament account for 10-25% (mass ratio) of all the yarns woven into the base layer; preferably, the first elastic filament and the second elastic filament are made of 30-100 denier PBT (polybutylene terephthalate fiber), PTT (polytrimethylene terephthalate fiber), T400 (two polyester fibers with different shrinkage ratios are spun in parallel), T800 (two polyester fibers with different shrinkage ratios are spun in parallel) or SSY (two polyester fibers with the same shrinkage ratio are spun in parallel), etc.

[0078] Preferably, the filaments in the first filament coil layer and the second filament extension line layer are of DTY type, and the filaments in the second filament coil layer and the first filament extension line layer are of FDY type.

[0079] The gloss of the filament is not limited. The gloss that can be used is full matte, semi-matte and other gloss. Preferably, the gloss used by the filament is full matte, that is, the content of titanium dioxide in the filament is greater than or equal to 2.5%.

[0080] Example 2

[0081] The difference from Example 1 is that the content of the first elastic filament and the second elastic filament in the fabric is determined by the following steps:

[0082] S1, the content ranges of the first elastic filament and the second elastic filament are preset to be (a1, b1) and (a2, b2), wherein a1 is 5-15%, b1 is 20-30%, a2 is 0.01-0.5%, and b1 is 1.0-2.0%;

[0083] S2, determine the first elastic filament is The content of the second elastic filament with the best elasticity in the fabric is O1, and the second elastic filament is determined to be The fabric with the best elasticity has a content of O2, and the elasticity of the fabric when O1 and O2 are compared. If O2>O1, the content range of the first elastic filament and the second elastic filament is determined to be , otherwise, the content range of the second elastic filament is determined to be ;

[0084] S3, repeat S2 until the content range of the first elastic filament is less than 0.5%, and take the middle value of the range as the content of the first elastic filament and the second elastic filament. For example, the content range of the first elastic filament is (12.0%-12.4%), and the content range of the second elastic filament is (0.4%-1.2%). At this time, the content range of the first elastic filament is less than 0.5%. Therefore, the middle value of the content range of the first elastic filament is 12.2% as the content of the first elastic filament. At the same time, the middle value of the content range of the second elastic filament is 0.8% as the content of the second elastic filament.

[0085] In the woven fabric, the content of the first elastic filament and the second elastic filament interacts with each other and affects the overall elasticity of the woven fabric. The method of this embodiment can quickly and conveniently determine the appropriate content of the first elastic filament and the second elastic filament.

[0086] Example 3

[0087] The difference from Example 1 is that the ambient humidity is controlled by PID during the weaving process of the fabric, and the PID is controlled by the following formula:

[0088]

[0089] Wherein, Δu(c) corresponds to the change in humidity within the time interval between two samplings; Kc is a constant, 20-30; f(C) is the deviation at the Cth sampling, f(C-1) is the deviation at the C-1th sampling, and f(C-2) is the deviation at the -2th sampling; T I is the integration time, 4-5 min; T D is the differential time, 1-3min; T S is the sampling period, 1-1.5s.

[0090] In the process of weaving fabrics, environmental humidity is an important influencing factor. The humidity of the environment can be controlled by PID control of the humidifier. The PID control method of this embodiment provides a humidity control method for weaving with accurate control and fast response speed.

[0091] The preferred specific implementation modes and embodiments of the present invention are described in detail above, but the present invention is not limited to the above implementation modes and embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the concept of the present invention.

Claims

1. A dimensionally stable and elastic warp knitted fabric for medical inner wear, comprising In the first filament coil layer, each yarn completes a reciprocating traverse movement in front of three or more knitting needles to form a coil; In the second filament coil layer, each yarn moves back and forth in front of the needle of the same knitting needle to form a coil; In the base layer, each yarn moves back and forth on the backs of two or more knitting needles to be inserted into the fabric without forming a loop; The first filament extension line layer is continuous with the second filament coil layer, wherein each yarn completes a reciprocating lateral movement on the back of a corresponding knitting needle to form an extension line; The second filament extension line layer is continuous with the first filament coil layer, wherein each yarn completes a reciprocating lateral movement on the backs of corresponding three or more knitting needles to form an extension line; The fabric does not contain spun yarn; The base layer is woven from first elastic filaments and conductive yarns, and the conductive yarns are woven from conductive filaments and second elastic filaments. The content of the first elastic filament and the second elastic filament in the fabric is determined by the following steps: S1, the content ranges of the first elastic filament and the second elastic filament are preset to be (a1, b1) and (a2, b2), wherein a1 is 5-15%, b1 is 20-30%, a2 is 0.01-0.5%, and b2 is 1.0-1.5%; S2, determine the first elastic filament is The content of the second elastic filament with the best elasticity in the fabric is O1, and the second elastic filament is determined to be The fabric with the best elasticity is the content of the first elastic filament O2; compare the elasticity of the fabric at O1 and O2. If the elasticity of the fabric at O2 is greater than the elasticity of the fabric at O1, then the content range of the first elastic filament is determined to be ( , b1), otherwise, the content range of the second elastic filament is determined to be (a2, ); S3, repeat S2 until the difference between the upper and lower limits of the content range of the first elastic filament is less than 0.5%, and take the middle value of the content range of the first elastic filament and the middle value of the content range of the second elastic filament as the first elastic filament and the second elastic filament contents respectively.

2. The fabric according to claim 1, characterized in that: The mass proportion of the first elastic filaments and the second elastic filaments in all the yarns woven into the fabric is 10-25%.

3. The fabric according to claim 1, characterized in that: The number ratio of the first elastic filament to the conductive yarn is (20-35):

1.

4. The fabric according to claim 1, characterized in that: The first elastic filament and the second elastic filament are polyester fibers, and the polyester fibers are selected from one or more of PBT, PTT, T400, T800, and SSY.

5. A method for preparing the fabric according to any one of 1-4, comprising the following steps: The filaments are sequentially strung together in a full-threading manner to form a first filament coil layer and a second filament coil layer; The conductive yarn is formed by paralleling the conductive yarn and the second elastic filament, and the base layer is formed by full-threading the first elastic filament and the conductive yarn back and forth; The first filament extension line layer is formed by the filaments being fully threaded back and forth in the same coil column; The second filament extension line layer is formed by the filament being fully threaded through three or more coils in a longitudinal row in sequence; in, In the first filament coil layer, each yarn completes a reciprocating lateral movement in front of three or more knitting needles to form a coil; In the second filament coil layer, each yarn completes a reciprocating lateral movement in front of the same knitting needle to form a coil; In the base layer, each yarn completes a reciprocating lateral movement on the backs of two or more knitting needles to be inserted into the fabric without forming a loop; The yarns in the first filament extension line layer are continuous with the yarns in the second filament coil layer, and each yarn completes a reciprocating lateral movement on the back of the corresponding same knitting needle to form an inner layer extension line; In the second filament extension line layer, the yarn is continuous with the yarn of the second filament coil layer, and each yarn completes a reciprocating lateral movement on the backs of corresponding three or more knitting needles to form an outer layer extension line.

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