Washable carbonized film no-melt / no-drip fabric

Abstract

The present invention belongs to the technical field of blended fabrics, and particularly relates to a washable carbonized film no-melt / no-drip fabric. Blended fibers of the fabric comprise polyamide ester fibers, cotton fibers and polyester fibers, and the content of the polyamide ester fibers is 54.2-62.5 wt %; the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and the ratio of ester bonds to amide bonds in the polyamide ester fibers is (10.2-15.5):1. The final fabric has the characteristics of the carbonized film being no-melt / no-drip and not being prone to volatile ash, and following multiple washings, the carbonized film highly effectively maintains the no-melt / no-drip functionality.

Description

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of blended fabrics, and particularly relates to a washable carbonized film no-melt / no-drip fabric.BACKGROUND ART

[0002] After combustion, fabrics can be divided into melt / drip fabrics and no-melt / no-drip fabrics according to different forms of combustion products. As is well known, melt / drip can be found in polyester fibers after combustion, while natural fibers are no-melt / no-drip after combustion and carbonization. The development and production of no-melt / no-drip fabrics have been carried out in many countries internationally, for example, fabrics have achieved the no-melt / no-drip effect by using acrylic fibers in Japan, and fabrics have achieved the no-melt / no-drip effect by using Vinylon in Europe or China.

[0003] The former melt / drip combustion products may be tightly attached to skin to cause serious secondary injuries, which is very dangerous, so the no-melt / no-drip fabrics have been applied in industries and occasions such as petroleum, chemical, dust-prone, and other flammable and explosive environments, as well as firefighting, high-temperature operations, and emergency training.

[0004] Additionally, the no-melt / no-drip fabrics can be further divided into volatile-ash no-melt / no-drip fabrics and carbonized film no-melt / no-drip fabrics, wherein the former generates combustion ash that disperses into air. In hazardous occasions such as explosions or fires, although the volatile-ash no-melt / no-drip fabrics do not cause secondary injuries due to melt / drip, they still expose the skin directly to high-temperature flame environments.

[0005] The latter is relatively good, which can be carbonized to form films, thus avoiding secondary injuries caused by melt / drip in hazardous occasions such as explosions or fires, and achieving a partial insulation effect on thermal injuries within environments.SUMMARY

[0006] However, the conventional no-melt / no-drip fabrics primarily focus on achieving a non-melting effect during combustion in terms of research and development, with little attention or breakthroughs in the field of no-melt / no-drip carbonized film-forming fabrics. Typically, fewer available carbonized film-forming fabrics can withstand only 1-2 wash cycles before losing carbonized film-forming properties after combustion.

[0007] Chinese patent with patent publication No. CN107177979A and publication date of Sep. 19, 2017 has disclosed a droplet-free flame-retardant polyester fiber / fabric and a preparation method thereof. The polyester fiber / fabric is characterized in that an outer surface of the flame-retardant polyester fiber / fabric is impregnated with glue containing a flame retardant and a crosslinking agent, the flame retardant and the crosslinking agent are grafted and introduced to the fabric by electron beam irradiation, and a surface material is formed; the surface material is steamed with steam and then soaped, rinsed and dried, and the droplet-free flame-retardant polyester fiber / fabric with weight gain being 5%-35% by mass is obtained.

[0008] However, the droplet-free flame-retardant polyester fiber / fabric according to the present disclosure have used a large amount of flame retardant to achieve a sufficient droplet-free flame-retardant effect, so that the close-fitting wearing experience of such a fabric is poor.

[0009] More importantly, the droplet-free effect is specifically characterized as volatile ash with no-melt / no-drip, and after the combustion of the fabric, the skin is directly exposed, which is still extremely dangerous.

[0010] Therefore, in summary, there is an urgent need for a novel fabric with long-term effective functionality of a carbonized film being no-melt / no-drip, ensuring that such functionality is not significantly reduced even after multiple times of washing.

[0011] The present disclosure aims to provide a washable carbonized film no-melt / no-drip fabric, wherein blended fibers of the fabric include polyamide ester fibers, cotton fibers and polyester fibers, and the content of the polyamide ester fibers is 54.2-62.5 wt. %; the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecane diol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is (10.2-15.5):1. The final fabric has the characteristics of the carbonized film being no-melt / no-drip and not being prone to volatile ash, and following multiple times of washing, the carbonized film highly effectively maintains the no-melt / no-drip functionality.

[0012] The technical solution adopted by the present disclosure for solving the problems is as follows: the washable carbonized film no-melt / no-drip fabric includes the polyamide ester fibers, the cotton fibers and the polyester fibers, wherein the content of the polyamide ester fibers is 54.2-62.5 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is (10.2-15.5):1.

[0013] According to the present disclosure, the polyester fibers, that is, terylene, have the preliminary washable advantage, while the cotton fibers, that is, natural fibers, have the preliminary no-melt / no-drip advantage. The applicant has achieved the following two objectives by quantitatively introducing the polyamide ester fibers containing specific components.

[0014] Firstly, the ordinary no-melt / no-drip effect is upgraded into the effect of the carbonized film being no-melt / no-drip, which, in hazardous occasions such as explosions and fires, not only prevents secondary injuries caused by melt / drip, but also provides partial insulation against thermal injuries within environments, thereby reducing the likelihood of volatile ash.

[0015] Secondly, not only the carbonized film is no-melt / no-drip, but also after at least 50 times of washing, the functionality of the carbonized film being no-melt / no-drip is still efficiently maintained and cannot be remarkably degraded.

[0016] The further preferred technical solution is as follows: the content of the polyamide ester fibers is 56.6 wt. %, and the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is 14.6:1.

[0017] According to the present disclosure, the applicant has found that the specific polyamide ester fibers with the content of 56.6 wt. % and the ratio of 14.6:1, when used in fabric weaving, impart the fabric with the optimal combination of two indexes: carbonized film-forming performance with no-melt / no-drip and minimal degradation of such performance after multiple times of washing, namely, at the initial stage of wearing, the fabric exhibits a high film-forming ratio after combustion, with a volatile ash ratio of less than 2%. Even after 50 times of washing, the volatile ash ratio remains below 3% after combustion of the fabric, indicating that the functionality of the carbonized film being no-melt / no-drip remains effective over the long term.

[0018] The further preferred technical solution is as follows: when the content of the polyamide ester fibers is 54.2-56.6 wt. % (excluding 56.6 wt. %), the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is (10.2-14.6):1 (excluding 14.6:1). When the content of the polyamide ester fibers is 56.6-62.5 wt. %, the ratio of the ester bonds to the amide bonds in the polyester amide fibers is (14.6-15.5):1.

[0019] According to the present disclosure, the applicant has found that when the content of the polyamide ester fibers is 54.2-56.6 wt. % (excluding 56.6 wt. %), and if the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is increased, the effect of the carbonized film being no-melt / no-drip after multiple times of washing is significantly reduced. Therefore, the applicant has limited the maximum ratio of the ester bonds to the amide bonds of 14.6:1.

[0020] When the content of the polyamide ester fibers is 56.6-62.5 wt. %, the carbonized film-forming proportion of an initial fabric can be obviously improved by properly increasing the ratio of the ester bonds to the amide bonds on the premise of slightly reducing the washable properties of the fabric with the performance of the carbonized film being no-melt / no-drip. Particularly, the carbonized film-forming proportion is the highest in the group with the content of the polyamide ester fibers of 56.6 wt. % and the ratio of the ester bonds to the amide bonds of 14.6:1. Therefore, the priority of improving the carbonized film-forming proportion is higher than that of prolonging the effective period of the performance of the carbonized film being no-melt / no-drip.

[0021] The further preferred technical solution is as follows: a length of the polyamide ester fibers is 38 mm, and a linear density is 1.33-1.56 dtex.

[0022] The further preferred technical solution is as follows: an elongation at break of the polyamide ester fibers is 43-49%, and a conventional moisture regain is 0.6-0.7%.

[0023] The further preferred technical solution is as follows: a melting point of the polyamide ester fibers is 245-248° C., a melt crystallization temperature is 170-190° C., and a limiting oxygen index (LOI) is 21.6-22.5%.

[0024] According to the present disclosure, the cotton fibers inherently have a basic no-melt / no-drip effect. Therefore, it is essential for the polyamide ester fibers to at least also achieve the relatively basic and primary no-melt / no-drip effect, so that the length and linear density of the polyamide ester fibers are limited as mentioned above, thus ensuring that the polyamide ester fibers have the outstanding LOI of 21.6-22.5%. Finally, the polyamide ester fibers not only avoid compromising the no-melt / no-drip effect of the cotton fibers, but further upgrade the no-melt / no-drip effect into the effect of the carbonized film being no-melt / no-drip, thus ensuring that the fabric, after combustion, does not produce a significant amount of volatile ash.

[0025] The further preferred technical solution is as follows: the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns.

[0026] The further preferred technical solution is as follows: a warp density of the fabric is 390-520 yarns / 10 cm, and a weft density of the fabric is 200-280 yarns / 10 cm.

[0027] The further preferred technical solution is as follows: a volatile ash ratio of the initial fabric after combustion is less than or equal to 2%, and the volatile ash ratio of the fabric washed 50 times after combustion is less than or equal to 3%.

[0028] The further preferred technical solution is as follows: the LOI of the fabric under a standard GB / T5455-1997 is 22-26%, and the fabric is no-melt / no-drip during combustion.

[0029] According to the present disclosure, the area of the volatile ash after combustion of the fabric accounts for less than 3% of the whole area, thus ensuring that a large amount of combusted volatile ash is not produced.

[0030] The present disclosure has the following advantages:

[0031] Firstly, the fabric, after combustion, exhibits a carbonized film no-melt / no-drip pattern. The carbonized film resists volatile ash and remains capable of covering the skin, providing partial insulation against heat.

[0032] Secondly, the outstanding performance of the carbonized film being no-melt / no-drip of the fabric is very significant before washing of the fabric, and remains relatively excellent after washing 50 times, which can be effective over a long term.

[0033] Thirdly, the fabric is simple and convenient in the warp and weft weaving method, and the fabric has high application value in the fields of firefighting and high-temperature operations.BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG. 1 is a schematic view of a carbonized film formed after combustion of a no-melt / no-drip fabric according to the present disclosure.

[0035] FIG. 2 is a schematic view of volatile ash after combustion of a no-melt / no-drip fabric in the prior art.

[0036] FIG. 3 is a schematic view of a melt / drip fabric after combustion in the prior art.

[0037] FIG. 4 is a table showing results of fabric performance tests in examples and comparative examples according to the present disclosure.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following descriptions are only preferred embodiments of the present disclosure, but are not construed as limiting the scope of the present disclosure.Example 1

[0039] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 56.6 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 14.6:1.

[0040] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 44%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 246° C., a melt crystallization temperature is 172° C., and a limiting oxygen index (LOI) is 21.8%.

[0041] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 512 yarns / 10 cm, and a weft density of the fabric is 275 yarns / 10 cm.

[0042] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 2

[0043] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 54.2 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 10.2:1.

[0044] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 43%, and a conventional moisture regain is 0.6%. A melting point of the polyamide ester fibers is 247° C., a melt crystallization temperature is 171° C., and a limiting oxygen index (LOI) is 21.9%.

[0045] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 504 yarns / 10 cm, and a weft density of the fabric is 237 yarns / 10 cm.

[0046] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 3

[0047] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 62.5 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 15.5:1.

[0048] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 47%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 185° C., and a limiting oxygen index (LOI) is 22.2%.

[0049] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 394 yarns / 10 cm, and a weft density of the fabric is 208 yarns / 10 cm.

[0050] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 4

[0051] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 55.9 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 12.5:1.

[0052] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 49%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 188° C., and a limiting oxygen index (LOI) is 22.0%.

[0053] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 475 yarns / 10 cm, and a weft density of the fabric is 236 yarns / 10 cm.

[0054] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 5

[0055] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 58.2 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 14.7:1.

[0056] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.33 dtex. An elongation at break of the polyamide ester fibers is 45%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 188° C., and a limiting oxygen index (LOI) is 22.3%.

[0057] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 475 yarns / 10 cm, and a weft density of the fabric is 236 yarns / 10 cm.

[0058] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Comparative Example 1

[0059] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 53.0 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 9.8:1.

[0060] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 47%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 246° C., a melt crystallization temperature is 182° C., and a limiting oxygen index (LOI) is 22.0%.

[0061] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 512 yarns / 10 cm, and a weft density of the fabric is 275 yarns / 10 cm.

[0062] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Comparative Example 2

[0063] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 54.9 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 18.0:1.

[0064] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 48%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 245° C., a melt crystallization temperature is 185° C., and a limiting oxygen index (LOI) is 21.7%.

[0065] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 504 yarns / 10 cm, and a weft density of the fabric is 237 yarns / 10 cm.

[0066] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Comparative Example 3

[0067] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 65.1 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 13.4:1.

[0068] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 48%, and a conventional moisture regain is 0.6%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 186° C., and a limiting oxygen index (LOI) is 21.9%.

[0069] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 394 yarns / 10 cm, and a weft density of the fabric is 208 yarns / 10 cm.

[0070] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.

[0071] It should be noted that, during the combustion test process, all fabrics are divided into two parts, one part is used for initial combustion tests, while the other part is subjected to the combustion tests after being washed and dried 50 times.

[0072] The following conclusions can be drawn in conjunction with the above 5 examples, 3 comparative examples, and 4 figure illustrations.

[0073] Firstly, a total of 3 comparative examples were tested, and in the first comparative example, the ratio of the ester bonds to the amide bonds in the polyamide ester fibers was too low; in the second comparative example, the ratio was too high; and in the last comparative example, the content of the polyamide ester fibers was too high. The above three test results ultimately resulted in the excessively high volatile ash ratio after the combustion of the initial fabric, indicating that the performance of the carbonized film being no-melt / no-drip failed to meet the standard.

[0074] Secondly, after 50 times of washing, the fabrics across both 3 comparative examples and 5 examples have uniformly demonstrated a decline in the performance of the carbonized film being no-melt / no-drip, with no evidence of improvement.

[0075] Thirdly, in all 5 examples, the fabrics meet the standards in terms of the performance of the carbonized film being no-melt / no-drip, both in the initial state and after 50 times of washing, with the volatile ash ratio of ≤3%.

[0076] Fourthly, the blended fabric consisting of the polyamide ester fibers, the cotton fibers and the polyester fibers has the basic no-melt / no-drip effect.

[0077] The implementations of the present disclosure are described in detail with reference to the drawings, however, the present disclosure is not limited to these. A person ordinarily skilled in the art can also make various modifications within their knowledge range without departing from the purpose of the present disclosure. These modifications are not inventive, and are protected by patent laws as long as they fall within the scope of the claims of the present disclosure.

Examples

example 1

[0039]A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 56.6 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 14.6:1.

[0040]Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 44%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 246° C., a melt crystallization temperature is 172° C., and a limiting oxygen index (LOI) is 21.8%.

[0041]Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A w...

example 2

[0043]A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 54.2 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 10.2:1.

[0044]Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 43%, and a conventional moisture regain is 0.6%. A melting point of the polyamide ester fibers is 247° C., a melt crystallization temperature is 171° C., and a limiting oxygen index (LOI) is 21.9%.

[0045]Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A w...

example 3

[0047]A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 62.5 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 15.5:1.

[0048]Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 47%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 185° C., and a limiting oxygen index (LOI) is 22.2%.

[0049]Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A w...

TECHNICAL FIELD

[0001] The present disclosure belongs to the technical field of blended fabrics, and particularly relates to a washable carbonized film no-melt / no-drip fabric.BACKGROUND ART

[0002] After combustion, fabrics can be divided into melt / drip fabrics and no-melt / no-drip fabrics according to different forms of combustion products. As is well known, melt / drip can be found in polyester fibers after combustion, while natural fibers are no-melt / no-drip after combustion and carbonization. The development and production of no-melt / no-drip fabrics have been carried out in many countries internationally, for example, fabrics have achieved the no-melt / no-drip effect by using acrylic fibers in Japan, and fabrics have achieved the no-melt / no-drip effect by using Vinylon in Europe or China.

[0003] The former melt / drip combustion products may be tightly attached to skin to cause serious secondary injuries, which is very dangerous, so the no-melt / no-drip fabrics have been applied in industries and occasions such as petroleum, chemical, dust-prone, and other flammable and explosive environments, as well as firefighting, high-temperature operations, and emergency training.

[0004] Additionally, the no-melt / no-drip fabrics can be further divided into volatile-ash no-melt / no-drip fabrics and carbonized film no-melt / no-drip fabrics, wherein the former generates combustion ash that disperses into air. In hazardous occasions such as explosions or fires, although the volatile-ash no-melt / no-drip fabrics do not cause secondary injuries due to melt / drip, they still expose the skin directly to high-temperature flame environments.

[0005] The latter is relatively good, which can be carbonized to form films, thus avoiding secondary injuries caused by melt / drip in hazardous occasions such as explosions or fires, and achieving a partial insulation effect on thermal injuries within environments.SUMMARY

[0006] However, the conventional no-melt / no-drip fabrics primarily focus on achieving a non-melting effect during combustion in terms of research and development, with little attention or breakthroughs in the field of no-melt / no-drip carbonized film-forming fabrics. Typically, fewer available carbonized film-forming fabrics can withstand only 1-2 wash cycles before losing carbonized film-forming properties after combustion.

[0007] Chinese patent with patent publication No. CN107177979A and publication date of Sep. 19, 2017 has disclosed a droplet-free flame-retardant polyester fiber / fabric and a preparation method thereof. The polyester fiber / fabric is characterized in that an outer surface of the flame-retardant polyester fiber / fabric is impregnated with glue containing a flame retardant and a crosslinking agent, the flame retardant and the crosslinking agent are grafted and introduced to the fabric by electron beam irradiation, and a surface material is formed; the surface material is steamed with steam and then soaped, rinsed and dried, and the droplet-free flame-retardant polyester fiber / fabric with weight gain being 5%-35% by mass is obtained.

[0008] However, the droplet-free flame-retardant polyester fiber / fabric according to the present disclosure have used a large amount of flame retardant to achieve a sufficient droplet-free flame-retardant effect, so that the close-fitting wearing experience of such a fabric is poor.

[0009] More importantly, the droplet-free effect is specifically characterized as volatile ash with no-melt / no-drip, and after the combustion of the fabric, the skin is directly exposed, which is still extremely dangerous.

[0010] Therefore, in summary, there is an urgent need for a novel fabric with long-term effective functionality of a carbonized film being no-melt / no-drip, ensuring that such functionality is not significantly reduced even after multiple times of washing.

[0011] The present disclosure aims to provide a washable carbonized film no-melt / no-drip fabric, wherein blended fibers of the fabric include polyamide ester fibers, cotton fibers and polyester fibers, and the content of the polyamide ester fibers is 54.2-62.5 wt. %; the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecane diol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is (10.2-15.5):1. The final fabric has the characteristics of the carbonized film being no-melt / no-drip and not being prone to volatile ash, and following multiple times of washing, the carbonized film highly effectively maintains the no-melt / no-drip functionality.

[0012] The technical solution adopted by the present disclosure for solving the problems is as follows: the washable carbonized film no-melt / no-drip fabric includes the polyamide ester fibers, the cotton fibers and the polyester fibers, wherein the content of the polyamide ester fibers is 54.2-62.5 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is (10.2-15.5):1.

[0013] According to the present disclosure, the polyester fibers, that is, terylene, have the preliminary washable advantage, while the cotton fibers, that is, natural fibers, have the preliminary no-melt / no-drip advantage. The applicant has achieved the following two objectives by quantitatively introducing the polyamide ester fibers containing specific components.

[0014] Firstly, the ordinary no-melt / no-drip effect is upgraded into the effect of the carbonized film being no-melt / no-drip, which, in hazardous occasions such as explosions and fires, not only prevents secondary injuries caused by melt / drip, but also provides partial insulation against thermal injuries within environments, thereby reducing the likelihood of volatile ash.

[0015] Secondly, not only the carbonized film is no-melt / no-drip, but also after at least 50 times of washing, the functionality of the carbonized film being no-melt / no-drip is still efficiently maintained and cannot be remarkably degraded.

[0016] The further preferred technical solution is as follows: the content of the polyamide ester fibers is 56.6 wt. %, and the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is 14.6:1.

[0017] According to the present disclosure, the applicant has found that the specific polyamide ester fibers with the content of 56.6 wt. % and the ratio of 14.6:1, when used in fabric weaving, impart the fabric with the optimal combination of two indexes: carbonized film-forming performance with no-melt / no-drip and minimal degradation of such performance after multiple times of washing, namely, at the initial stage of wearing, the fabric exhibits a high film-forming ratio after combustion, with a volatile ash ratio of less than 2%. Even after 50 times of washing, the volatile ash ratio remains below 3% after combustion of the fabric, indicating that the functionality of the carbonized film being no-melt / no-drip remains effective over the long term.

[0018] The further preferred technical solution is as follows: when the content of the polyamide ester fibers is 54.2-56.6 wt. % (excluding 56.6 wt. %), the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is (10.2-14.6):1 (excluding 14.6:1). When the content of the polyamide ester fibers is 56.6-62.5 wt. %, the ratio of the ester bonds to the amide bonds in the polyester amide fibers is (14.6-15.5):1.

[0019] According to the present disclosure, the applicant has found that when the content of the polyamide ester fibers is 54.2-56.6 wt. % (excluding 56.6 wt. %), and if the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is increased, the effect of the carbonized film being no-melt / no-drip after multiple times of washing is significantly reduced. Therefore, the applicant has limited the maximum ratio of the ester bonds to the amide bonds of 14.6:1.

[0020] When the content of the polyamide ester fibers is 56.6-62.5 wt. %, the carbonized film-forming proportion of an initial fabric can be obviously improved by properly increasing the ratio of the ester bonds to the amide bonds on the premise of slightly reducing the washable properties of the fabric with the performance of the carbonized film being no-melt / no-drip. Particularly, the carbonized film-forming proportion is the highest in the group with the content of the polyamide ester fibers of 56.6 wt. % and the ratio of the ester bonds to the amide bonds of 14.6:1. Therefore, the priority of improving the carbonized film-forming proportion is higher than that of prolonging the effective period of the performance of the carbonized film being no-melt / no-drip.

[0021] The further preferred technical solution is as follows: a length of the polyamide ester fibers is 38 mm, and a linear density is 1.33-1.56 dtex.

[0022] The further preferred technical solution is as follows: an elongation at break of the polyamide ester fibers is 43-49%, and a conventional moisture regain is 0.6-0.7%.

[0023] The further preferred technical solution is as follows: a melting point of the polyamide ester fibers is 245-248° C., a melt crystallization temperature is 170-190° C., and a limiting oxygen index (LOI) is 21.6-22.5%.

[0024] According to the present disclosure, the cotton fibers inherently have a basic no-melt / no-drip effect. Therefore, it is essential for the polyamide ester fibers to at least also achieve the relatively basic and primary no-melt / no-drip effect, so that the length and linear density of the polyamide ester fibers are limited as mentioned above, thus ensuring that the polyamide ester fibers have the outstanding LOI of 21.6-22.5%. Finally, the polyamide ester fibers not only avoid compromising the no-melt / no-drip effect of the cotton fibers, but further upgrade the no-melt / no-drip effect into the effect of the carbonized film being no-melt / no-drip, thus ensuring that the fabric, after combustion, does not produce a significant amount of volatile ash.

[0025] The further preferred technical solution is as follows: the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns.

[0026] The further preferred technical solution is as follows: a warp density of the fabric is 390-520 yarns / 10 cm, and a weft density of the fabric is 200-280 yarns / 10 cm.

[0027] The further preferred technical solution is as follows: a volatile ash ratio of the initial fabric after combustion is less than or equal to 2%, and the volatile ash ratio of the fabric washed 50 times after combustion is less than or equal to 3%.

[0028] The further preferred technical solution is as follows: the LOI of the fabric under a standard GB / T5455-1997 is 22-26%, and the fabric is no-melt / no-drip during combustion.

[0029] According to the present disclosure, the area of the volatile ash after combustion of the fabric accounts for less than 3% of the whole area, thus ensuring that a large amount of combusted volatile ash is not produced.

[0030] The present disclosure has the following advantages:

[0031] Firstly, the fabric, after combustion, exhibits a carbonized film no-melt / no-drip pattern. The carbonized film resists volatile ash and remains capable of covering the skin, providing partial insulation against heat.

[0032] Secondly, the outstanding performance of the carbonized film being no-melt / no-drip of the fabric is very significant before washing of the fabric, and remains relatively excellent after washing 50 times, which can be effective over a long term.

[0033] Thirdly, the fabric is simple and convenient in the warp and weft weaving method, and the fabric has high application value in the fields of firefighting and high-temperature operations.BRIEF DESCRIPTION OF THE DRAWINGS

[0034] FIG. 1 is a schematic view of a carbonized film formed after combustion of a no-melt / no-drip fabric according to the present disclosure.

[0035] FIG. 2 is a schematic view of volatile ash after combustion of a no-melt / no-drip fabric in the prior art.

[0036] FIG. 3 is a schematic view of a melt / drip fabric after combustion in the prior art.

[0037] FIG. 4 is a table showing results of fabric performance tests in examples and comparative examples according to the present disclosure.DETAILED DESCRIPTION OF THE EMBODIMENTS

[0038] The following descriptions are only preferred embodiments of the present disclosure, but are not construed as limiting the scope of the present disclosure.Example 1

[0039] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 56.6 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 14.6:1.

[0040] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 44%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 246° C., a melt crystallization temperature is 172° C., and a limiting oxygen index (LOI) is 21.8%.

[0041] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 512 yarns / 10 cm, and a weft density of the fabric is 275 yarns / 10 cm.

[0042] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 2

[0043] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 54.2 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 10.2:1.

[0044] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 43%, and a conventional moisture regain is 0.6%. A melting point of the polyamide ester fibers is 247° C., a melt crystallization temperature is 171° C., and a limiting oxygen index (LOI) is 21.9%.

[0045] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 504 yarns / 10 cm, and a weft density of the fabric is 237 yarns / 10 cm.

[0046] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 3

[0047] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 62.5 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 15.5:1.

[0048] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 47%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 185° C., and a limiting oxygen index (LOI) is 22.2%.

[0049] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 394 yarns / 10 cm, and a weft density of the fabric is 208 yarns / 10 cm.

[0050] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 4

[0051] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 55.9 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 12.5:1.

[0052] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 49%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 188° C., and a limiting oxygen index (LOI) is 22.0%.

[0053] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 475 yarns / 10 cm, and a weft density of the fabric is 236 yarns / 10 cm.

[0054] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Example 5

[0055] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 58.2 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 14.7:1.

[0056] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.33 dtex. An elongation at break of the polyamide ester fibers is 45%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 188° C., and a limiting oxygen index (LOI) is 22.3%.

[0057] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 475 yarns / 10 cm, and a weft density of the fabric is 236 yarns / 10 cm.

[0058] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Comparative Example 1

[0059] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 53.0 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 9.8:1.

[0060] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 47%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 246° C., a melt crystallization temperature is 182° C., and a limiting oxygen index (LOI) is 22.0%.

[0061] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 512 yarns / 10 cm, and a weft density of the fabric is 275 yarns / 10 cm.

[0062] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Comparative Example 2

[0063] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 54.9 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 18.0:1.

[0064] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 48%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 245° C., a melt crystallization temperature is 185° C., and a limiting oxygen index (LOI) is 21.7%.

[0065] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 504 yarns / 10 cm, and a weft density of the fabric is 237 yarns / 10 cm.

[0066] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.Comparative Example 3

[0067] A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 65.1 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 13.4:1.

[0068] Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 48%, and a conventional moisture regain is 0.6%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 186° C., and a limiting oxygen index (LOI) is 21.9%.

[0069] Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A warp density of the fabric is 394 yarns / 10 cm, and a weft density of the fabric is 208 yarns / 10 cm.

[0070] Finally, the fabric in the example was tested, test items include a volatile ash ratio (%) of an initial fabric after combustion, a volatile ash ratio (%) of a fabric washed 50 times after combustion, a limiting oxygen index (%) and melt / drip or not during combustion, and final test results are shown in FIG. 4.

[0071] It should be noted that, during the combustion test process, all fabrics are divided into two parts, one part is used for initial combustion tests, while the other part is subjected to the combustion tests after being washed and dried 50 times.

[0072] The following conclusions can be drawn in conjunction with the above 5 examples, 3 comparative examples, and 4 figure illustrations.

[0073] Firstly, a total of 3 comparative examples were tested, and in the first comparative example, the ratio of the ester bonds to the amide bonds in the polyamide ester fibers was too low; in the second comparative example, the ratio was too high; and in the last comparative example, the content of the polyamide ester fibers was too high. The above three test results ultimately resulted in the excessively high volatile ash ratio after the combustion of the initial fabric, indicating that the performance of the carbonized film being no-melt / no-drip failed to meet the standard.

[0074] Secondly, after 50 times of washing, the fabrics across both 3 comparative examples and 5 examples have uniformly demonstrated a decline in the performance of the carbonized film being no-melt / no-drip, with no evidence of improvement.

[0075] Thirdly, in all 5 examples, the fabrics meet the standards in terms of the performance of the carbonized film being no-melt / no-drip, both in the initial state and after 50 times of washing, with the volatile ash ratio of ≤3%.

[0076] Fourthly, the blended fabric consisting of the polyamide ester fibers, the cotton fibers and the polyester fibers has the basic no-melt / no-drip effect.

[0077] The implementations of the present disclosure are described in detail with reference to the drawings, however, the present disclosure is not limited to these. A person ordinarily skilled in the art can also make various modifications within their knowledge range without departing from the purpose of the present disclosure. These modifications are not inventive, and are protected by patent laws as long as they fall within the scope of the claims of the present disclosure.

Examples

example 1

[0039]A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 56.6 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 14.6:1.

[0040]Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 44%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 246° C., a melt crystallization temperature is 172° C., and a limiting oxygen index (LOI) is 21.8%.

[0041]Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A w...

example 2

[0043]A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 54.2 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 10.2:1.

[0044]Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 43%, and a conventional moisture regain is 0.6%. A melting point of the polyamide ester fibers is 247° C., a melt crystallization temperature is 171° C., and a limiting oxygen index (LOI) is 21.9%.

[0045]Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A w...

example 3

[0047]A washable carbonized film no-melt / no-drip fabric includes polyamide ester fibers, cotton fibers and polyester fibers, wherein the content of the polyamide ester fibers is 62.5 wt. %, the polyamide ester fibers are prepared via the copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is 15.5:1.

[0048]Wherein a length of the polyamide ester fibers is 38 mm, and a linear density is 1.56 dtex. An elongation at break of the polyamide ester fibers is 47%, and a conventional moisture regain is 0.7%. A melting point of the polyamide ester fibers is 248° C., a melt crystallization temperature is 185° C., and a limiting oxygen index (LOI) is 22.2%.

[0049]Then, the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns. A w...

Claims

1. A washable carbonized film no-melt / no-drip fabric, comprising polyamide ester fibers, cotton fibers and polyester fibers, wherein a content of the polyamide ester fibers is 54.2-62.5 wt. %, the polyamide ester fibers are prepared via copolymerization of terephthalic acid, dodecanediol and caprolactam, and a ratio of ester bonds to amide bonds in the polyamide ester fibers is (10.2-15.5):1.

2. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein the content of the polyamide ester fibers is 56.6 wt. %, and the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is 14.6:1.

3. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein when the content of the polyamide ester fibers is 54.2-56.6 wt. %, excluding 56.6 wt. %, the ratio of the ester bonds to the amide bonds in the polyamide ester fibers is (10.2-14.6):1, excluding 14.6:1; and when the content of the polyamide ester fibers is 56.6-62.5 wt. %, the ratio of the ester bonds to the amide bonds in the polyester amide fibers is (14.6-15.5):1.

4. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein a length of the polyamide ester fibers is 38 mm, and a linear density of the polyamide ester fibers is 1.33-1.56 dtex.

5. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein an elongation at break of the polyamide ester fibers is 43-49%, and a conventional moisture regain is 0.6-0.7%.

6. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein a melting point of the polyamide ester fibers is 245-248° C., a melt crystallization temperature is 170-190° C., and a limiting oxygen index (LOI) is 21.6-22.5%.

7. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein the fabric is prepared via a warp-weft weaving method, the polyamide ester fibers, the cotton fibers and the polyester fibers are prepared into weft yarns, and the polyamide ester fibers and the polyester fibers are prepared into warp yarns.

8. The washable carbonized film no-melt / no-drip fabric according to claim 7, wherein a warp density of the fabric is 390-520 yarns / 10 cm, and a weft density of the fabric is 200-280 yarns / 10 cm.

9. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein a volatile ash ratio of an initial fabric after combustion is less than or equal to 2%, and a volatile ash ratio of a fabric washed 50 times after combustion is less than or equal to 3%.

10. The washable carbonized film no-melt / no-drip fabric according to claim 1, wherein an LOI of the fabric under a standard GB / T5455-1997 is 22-26%, and the fabric is no-melt / no-drip during combustion.

Images