Flame-retardant composite knitted fabric

Abstract

The utility model discloses a flame-retardant composite knitted fabric, which relates to the field of fabrics, and has the technical scheme that the flame-retardant composite knitted fabric comprises a flame-retardant layer and a heat-insulating layer, the flame-retardant layer comprises guide bar GB1 yarns, guide bar GB2 yarns and guide bar GB3 yarns, the minimum knitting cycle of the guide bar GB1 yarns and the minimum knitting cycle of the guide bar GB2 yarns form a pad-lacking structure on a single wale, and the heat-insulating layer is arranged between the flame-retardant layer and the heat-insulating layer. The guide bar GB1 yarns and the guide bar GB2 yarns are arranged at intervals, the minimum knitting cycle of the guide bar GB3 yarns forms a pad-lacking structure among a plurality of longitudinal rows, and the guide bar GB3 yarns are connected with the adjacent guide bar GB1 yarns and guide bar GB2 yarns. The burning part and the non-burning part on the flame-retardant layer are easy to break, the burning part is easy to fall off from the whole flame-retardant layer, flame is prevented from continuously spreading on the fabric, the phenolic aldehyde yarns have the characteristics of good heat insulation performance and difficulty in burning, heat is prevented from being transmitted to the inner side of the fabric through the heat insulation layer, and the flame-retardant effect is good. The heat insulation effect of the fabric is improved.

Description

Technical Field

[0001] The utility model relates to the field of fabrics, and more specifically, to a flame-retardant composite knitted fabric. Background Art

[0002] Flame-retardant fabric refers to fabric that can quickly extinguish after leaving the open flame even if it is ignited by an open flame. It is often used in protective clothing that needs to work in high temperature environments. Existing flame-retardant fabrics gradually extinguish when burning, but the open flame will still remain on the fabric for a certain period of time and spread a certain distance, increasing the damaged area of ​​the fabric.

[0003] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a flame retardant composite knitted fabric.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: a flame-retardant composite knitted fabric, comprising a flame-retardant layer and a heat-insulating layer, the flame-retardant layer comprising a comb GB1 yarn, a comb GB2 yarn and a comb GB3 yarn, the minimum weaving cycle of the comb GB1 yarn and the minimum weaving cycle of the comb GB2 yarn both form a pad-less structure on a single longitudinal row, the comb GB1 yarn and the comb GB2 yarn are arranged at intervals, the minimum weaving cycle of the comb GB3 yarn forms a pad-less structure between several longitudinal rows, and the comb GB3 yarn connects adjacent comb GB1 yarns and comb GB2 yarns.

[0006] The utility model is further configured as follows: the flame retardant layer also includes a combing bar GB4 yarn, the minimum weaving cycle of the combing bar GB4 yarn is between the minimum weaving cycle of the combing bar GB1 yarn and the minimum weaving cycle of the combing bar GB2 yarn, and the combing bar GB4 yarn forms a weft insertion structure.

[0007] The utility model is further configured as follows: the needle-front lateral movement of the yarn of the combing bar GB1 and the needle-front lateral movement of the yarn of the combing bar GB2 are staggered in the warp direction.

[0008] The utility model is further configured as follows: the yarn inlay number of the combing bar GB1 yarn is 3-2 / 3-3 / / one through and two empty, and the yarn inlay number of the combing bar GB2 yarn is 3-3 / 3-4 / / one through and two empty.

[0009] The utility model is further configured as follows: the yarn inlay digital number of the combing bar GB3 yarn is 3-2 / 3-3 / 3-3 / 3-4 / 3-3 / 3-3 / / one through and two empty, and the yarn inlay digital number of the combing bar GB4 yarn is 3-3 / 0-0 / / one through and two empty.

[0010] The utility model is further configured as follows: the heat insulation layer is woven from phenolic yarns.

[0011] In summary, the utility model has the following beneficial effects: it is easy to cause a break between the burned part and the unburned part on the flame retardant layer, and it is easy to make the burned part fall off from the flame retardant layer as a whole, thereby preventing the flame from continuing to spread on the fabric; the phenolic yarn has good thermal insulation performance and is difficult to burn, and the thermal insulation layer prevents heat from being transferred to the inside of the fabric, thereby improving the thermal insulation effect of the fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the utility model;

[0013] Figure 2 This is a yarn laying motion diagram of the combing bar GB1 in the utility model;

[0014] Figure 3 This is the yarn laying motion diagram of the combing bar GB2 in the utility model;

[0015] Figure 4 This is a yarn laying motion diagram of the combing bar GB3 in the utility model;

[0016] Figure 5 This is a yarn padding motion diagram of the combing bar GB4 in the utility model.

[0017] In the figure: 1. Flame retardant layer; 2. Heat insulation layer. DETAILED DESCRIPTION

[0018] The utility model is described in detail below in conjunction with the accompanying drawings and embodiments.

[0019] Embodiment: A flame retardant composite knitted fabric, such as Figure 1-Figure 4 As shown, it includes a flame retardant layer 1 and a heat insulating layer 2, the flame retardant layer 1 includes a comb GB1 yarn, a comb GB2 yarn and a comb GB3 yarn, the minimum weaving cycle of the comb GB1 yarn and the minimum weaving cycle of the comb GB2 yarn both form a pad-less structure on a single longitudinal row, the comb GB1 yarn and the comb GB2 yarn are arranged at intervals, the minimum weaving cycle of the comb GB3 yarn forms a pad-less structure between several longitudinal rows, the comb GB3 yarn connects the adjacent comb GB1 yarn and the comb GB2 yarn, and the heat insulating layer 2 is woven from phenolic yarn.

[0020] Specifically, the needle back translation of the yarn of comb bar GB1 and the needle back translation of the yarn of comb bar GB2 are only performed in the longitudinal direction and span at least two stitch lengths, and the needle back translation of the yarn of comb bar GB3 is also at least about two stitch lengths faster in the warp direction. Therefore, when the flame retardant layer 1 is ignited, it is easy to cause a break between the burned part and the unburned part of the flame retardant layer 1, and it is easy to make the burned part fall off from the flame retardant layer 1 as a whole to prevent the flame from continuing to spread on the fabric, and the edge of the unburned part melts at high temperature to ensure that the unburned part will not fall off in large pieces. The thermal insulation layer 2 is located on the side of the flame retardant layer 1 away from the outside world. The phenolic yarn has good thermal insulation properties and is difficult to burn. The thermal insulation layer 2 prevents heat from being transferred to the inside of the fabric, thereby improving the thermal insulation effect of the fabric.

[0021] like Figure 2-Figure 5 As shown, the flame retardant layer 1 also includes a combing bar GB4 yarn, the minimum weaving cycle of the combing bar GB4 yarn is between the minimum weaving cycle of the combing bar GB1 yarn and the minimum weaving cycle of the combing bar GB2 yarn, the combing bar GB4 yarn forms a weft insertion structure, the needle front lateral shift of the combing bar GB1 yarn and the needle front lateral shift of the combing bar GB2 yarn are staggered in the warp direction, the inlay yarn number of the combing bar GB1 yarn is 3-2 / 3-3 / / one through and two empty, the inlay yarn number of the combing bar GB2 yarn is 3-3 / 3-4 / / one through and two empty, the inlay yarn number of the combing bar GB3 yarn is 3-2 / 3-3 / 3-3 / 3-4 / 3-3 / 3-3 / / one through and two empty, and the inlay yarn number of the combing bar GB4 yarn is 3-3 / 0-0 / / one through and two empty.

[0022] Specifically, the comb bar GB4 yarn increases the connection strength of the comb bar GB1 yarn and the comb bar GB2 yarn in the transverse direction. At the same time, because the comb bar GB4 yarn does not form a coil, the flame retardant layer 1 is also easily separated in the transverse direction when burning. The needle front lateral movement of the comb bar GB1 yarn and the comb bar GB2 yarn is offset by one needle distance in the warp direction, which is convenient for the connection of the comb bar GB4 yarn with the comb bar GB1 yarn or the comb bar GB2 yarn, thereby reducing the structural complexity of the flame retardant layer 1. This makes it easier for the flame retardant layer 1 to separate when it breaks due to burning. The yarns of comb GB1, GB2 and GB3 all adopt the threading rule of one thread and two holes, which reduces the possibility of burning being transmitted to adjacent yarns. The yarns of comb GB1, GB2, GB3 and GB4 are all twisted from acrylic fiber bundles, which have certain high temperature resistance, further ensuring the high temperature resistance of the fabric.

[0023] The above is only a preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A flame retardant composite knitted fabric, characterized in that: The invention comprises a flame retardant layer (1) and a heat insulating layer (2), wherein the flame retardant layer (1) comprises a combing bar GB1 yarn, a combing bar GB2 yarn and a combing bar GB3 yarn, wherein the minimum weaving cycle of the combing bar GB1 yarn and the minimum weaving cycle of the combing bar GB2 yarn both form a pad-less structure on a single longitudinal row, the combing bar GB1 yarn and the combing bar GB2 yarn are arranged at intervals, the minimum weaving cycle of the combing bar GB3 yarn forms a pad-less structure between a plurality of longitudinal rows, and the combing bar GB3 yarn connects adjacent combing bar GB1 yarns and combing bar GB2 yarns.

2. The flame retardant composite knitted fabric according to claim 1, characterized in that: The flame retardant layer (1) further comprises a combing bar GB4 yarn, the minimum weaving cycle of the combing bar GB4 yarn is between the minimum weaving cycle of the combing bar GB1 yarn and the minimum weaving cycle of the combing bar GB2 yarn, and the combing bar GB4 yarn forms a weft insertion structure.

3. The flame retardant composite knitted fabric according to claim 2, characterized in that: The needle-front traverse of the yarn of the combing bar GB1 and the needle-front traverse of the yarn of the combing bar GB2 are staggered in the warp direction.

4. The flame retardant composite knitted fabric according to claim 3, characterized in that: The yarn inlay number of the combing bar GB1 yarn is 3-2 / 3-3 / / one through and two empty, and the yarn inlay number of the combing bar GB2 yarn is 3-3 / 3-4 / / one through and two empty.

5. The flame retardant composite knitted fabric according to claim 4, characterized in that: The yarn inlay numbers of the combing bar GB3 yarn are 3-2 / 3-3 / 3-3 / 3-4 / 3-3 / 3-3 / / one through and two empty, and the yarn inlay numbers of the combing bar GB4 yarn are 3-3 / 0-0 / / one through and two empty.

6. The flame retardant composite knitted fabric according to claim 1, characterized in that: The heat insulation layer (2) is woven from phenolic yarns.

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