Cotton-linen blended mattress spring wrapping cloth and preparation method thereof

Abstract

The invention provides cotton and linen blended mattress spring wrapping cloth and a preparation method thereof, and belongs to the field of non-woven fabrics. The preparation method of the cotton and linen blended mattress spring wrapping cloth comprises the following steps: opening, cleaning and mixing, carding, lapping, needling and reinforcing, and post-processing. According to the cotton and linen blended mattress spring wrapping cloth and the preparation method thereof, the green sustainable development concept can be achieved, and the mechanical property and corrosion resistance of the mattress spring wrapping cloth can be improved while the anti-aging performance of the non-woven fabric is improved; meanwhile, in the preparation process of the cotton and linen blended mattress spring wrapping cloth, the problems that the tangling state is difficult to control, the blending uniformity is poor, the hardness style is difficult to control and the overall performance of the mattress spring wrapping cloth is unstable due to inconsistent characteristics of raw material fibers can be effectively avoided; and fiber breakage in the carding process is effectively avoided, fiber adhesion in the lapping process is avoided, and the preparation yield of the mattress spring wrapping cloth is increased.

Description

Technical Field

[0001] The invention relates to the field of non-woven fabrics, in particular to a cotton and linen blended mattress spring wrapping fabric and a preparation method thereof. Background Art

[0002] The raw material of non-woven fabric is generally 100% polypropylene non-woven fabric, but the use of 100% polypropylene non-woven fabric has the following problems: polypropylene fiber is derived from a by-product of petroleum, is a non-renewable resource, and is not easy to degrade, which is not conducive to the development of the current green and sustainable development concept of the industry; and 100% pure PP polypropylene non-woven fabric is prone to aging and has a short service life.

[0003] In order to solve the above problems and realize resource recycling, the most commonly used method is to mix other anti-aging fibers in the preparation of non-woven fabrics. However, after mixing with other fibers, although it can improve its anti-aging ability to a certain extent and extend its service life, it will lead to the reduction of the mechanical properties and corrosion resistance of the non-woven fabric as a mattress spring cover. At present, there is no method that can realize the concept of green and sustainable development and improve the mechanical properties and corrosion resistance of non-woven fabrics as mattress spring covers while improving their anti-aging properties.

[0004] In view of the above defects, the inventor has analyzed that when using polypropylene non-woven fabric as mattress spring wrapping fabric, the existing preparation process mainly includes: spunbond process and needle punching process. Since polypropylene non-woven fabric is not resistant to light, it is very easy to corrode and powder under light, and its service life is very short; and the melting point of polypropylene non-woven fabric material is very low (about 150-160℃), the welding temperature is difficult to control during the preparation process, and a slightly higher welding temperature will easily cause melting, resulting in serious weakening of the mechanical properties of the non-woven fabric. The existing mattress spring bag manufacturing process is to push the spring into the mattress spring wrapping fabric bonded by an infrared heating welding machine under natural light conditions. Since the spring has longitudinal and lateral stretching forces in the mattress spring wrapping fabric, the mechanical properties of the mattress spring wrapping fabric are extremely high. If the spring wrapping fabric is corroded and powdered or welded and melted, the spring wrapping fabric is very likely to rupture, resulting in the spring being exposed.

[0005] Furthermore, the inventors have found through experiments that in the process of mixing non-woven fabric fibers with other aging-resistant fibers, due to the inconsistency of the characteristics of the raw materials (such as rigidity, shrinkage, breaking performance, melting point, etc.), the entanglement state between the raw materials is difficult to control, the blending uniformity is poor, the soft and hard style is difficult to control, and the overall performance of the mattress spring wrap is unstable; and the fibers are prone to breakage during the combing process, making combing difficult. At the same time, due to the inconsistency of the water absorption of the raw materials, the fibers with strong water absorption are easy to absorb moisture in the air during the laying process, which leads to fiber adhesion, and then leads to a low yield rate of the prepared mattress spring wrap. Summary of the invention

[0006] In order to solve the technical problems existing in the prior art, the present invention provides a cotton and linen blended mattress spring covering cloth and a preparation method thereof, which can realize the concept of green and sustainable development, and can improve the mechanical properties and corrosion resistance of the mattress spring covering cloth while improving the anti-aging performance of the non-woven fabric; at the same time, in the preparation process of the cotton and linen blended mattress spring covering cloth, it can effectively avoid the problems of difficult to control entanglement state, poor blending uniformity, difficult to control soft and hard style, and unstable overall performance of the mattress spring covering cloth caused by inconsistent raw material fiber characteristics; effectively avoid fiber breakage during the combing process, and avoid fiber adhesion during the laying process, so as to improve the preparation yield of the mattress spring covering cloth.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: A method for preparing a cotton and linen blended mattress spring covering cloth comprises the following steps: raw material preparation, cleaning and mixing, carding, web laying, needle punching reinforcement and post-processing.

[0008] The method for preparing the raw materials is to select fibers of the following specifications as raw material fibers: Polypropylene fiber, fineness is 2.5-3.5D, length is 70-76mm, fiber breaking strength is 4.5-5CN / dtex, fiber breaking elongation is 40-50%; Cotton-type viscose fiber, fineness is 5.5-6D, length is 51-64mm, fiber breaking strength is 1-2CN / dtex, fiber breaking elongation is 30-35%; Natural hemp fiber, fineness is 15-20D, length is 30-40mm, fiber breaking strength is 3-3.5CN / dtex, fiber breaking elongation is 0-5%.

[0009] Preferably, the polypropylene fiber has a fineness of 3D, a length of 76 mm, a fiber breaking strength of 4.7 CN / dtex, and a fiber breaking elongation of 45%.

[0010] Cotton-type viscose fiber, fineness is 5.5D, length is 51mm, fiber breaking strength is 1.5CN / dtex, and fiber breaking elongation is 32%.

[0011] Natural hemp fiber, fineness is 15D, length is 30mm, fiber breaking strength is 3.2CN / dtex, fiber breaking elongation is 2.5%.

[0012] The method for opening, cleaning and mixing is as follows: the polypropylene fiber, cotton viscose fiber and natural hemp fiber are opened by an opening and cleaning machine in a weight ratio of 65-70:20-23:10-12 and then enter a mixing box, and after uniform mixing in the mixing box, the fibers are grabbed, and then finely opened, loosened and mixed to obtain mixed fibers after opening and cleaning.

[0013] In the cleaning and mixing process, the flat curtain running speed is controlled to be 1.5-2m / min, the inclined curtain running speed is 5-6m / min, and the cotton evenly running speed is 100-110m / min during the cotton picking process; During the fine opening process, the cotton suction speed is controlled at 100-105m / min, the wind cotton speed is 100-105m / min, and the cotton averaging roller speed is 120-130m / min.

[0014] The combing method is to feed the mixed fiber after cleaning into a combing machine for combing, and control the fiber feeding amount of the combing machine to be 23-25g / m 2 , the line speed is 40-45m / min (the line speed opening of the carding machine is 28-32%), the chest cylinder speed is 370-390m / min, the main cylinder speed is 1100-1200m / min, the upper and lower doffer speed is 105-115m / min, and the carded mixed fiber is obtained.

[0015] The web laying method is to pass the combed mixed fiber into a web laying machine for web laying, control the number of web laying layers to be 3-4 layers, the web laying width to be 3.8-4m, the web laying output speed to be 3-3.5m / min, the web laying tension to be 0.7-0.9%, the web laying overlap width to be 100-120mm, and obtain a mixed cotton web with a width of 3.8-4m.

[0016] The needle punching reinforcement method is to pass the mixed cotton web into a needle punching machine for three needle punching reinforcement processes to obtain a grey cloth with a mixed cotton web width of 3.5-3.7m, a flat surface and good uniformity.

[0017] Furthermore, in the acupuncture reinforcement, in the first acupuncture process, the working width of the acupuncture machine is controlled to be 3.7-3.9m, the needle density is 1500-1600 pieces / m, the acupuncture frequency is 400-500 times / min, and the production speed is 5-6m / min; In the second needling process, the working width of the needling machine is controlled to be 3.6-3.8m, the needle density is 10000-10500 pieces / m, the needling frequency is 550-630 times / min, and the production speed is 6-7m / min; In the third needling process, the working width of the needling machine is controlled to be 3.5-3.7m, the needle density is 10000-10500 pieces / m, the needling frequency is 580-650 times / min, and the production speed is 7-8m / min.

[0018] The post-treatment method is to perform hot pressing treatment on the grey cloth, control the hot pressing treatment temperature to be 163-168° C., the roller gap to be 0.3-0.4 mm, the roller pressure to be 800-900 psi, and after the hot pressing treatment, cut it according to needs to obtain the cotton and linen blended mattress spring wrapping cloth.

[0019] A cotton and linen blended mattress spring wrapping cloth, prepared by the above-mentioned preparation method; the gram weight of the cotton and linen blended mattress spring wrapping cloth is 80±5g / m 2 , thickness is 0.4±0.1mm, longitudinal breaking strength ≥280N, transverse breaking strength ≥300N; longitudinal tearing strength ≥90N, transverse tearing strength ≥80N; longitudinal elongation at break is 50-65%, transverse elongation at break is 60-75%; 45N longitudinal elongation is 5-10%, 45N transverse elongation is 8-15%; longitudinal bending length is 6-14cm, transverse bending length is 6-12cm.

[0020] Compared with the prior art, the present invention has the following beneficial effects: (1) The preparation method of the cotton-linen blended mattress spring cover of the present invention comprises the following steps: selecting raw material fibers (polypropylene fiber, cotton-type viscose fiber, natural-type hemp fiber) of specific specifications, and performing opening and cleaning mixing (including opening, cotton grabbing, and fine opening) of the aforementioned raw material fibers in specific proportions to obtain mixed fibers after opening and cleaning; then performing combing with specific process parameters to obtain the combed mixed fibers; then performing web laying to obtain a mixed cotton web; then performing three needle punching reinforcement steps on the mixed cotton web to obtain a grey cloth; the grey cloth is post-processed to obtain the cotton-linen blended mattress spring cover; the aforementioned processes are carried out to obtain the cotton-linen blended mattress spring cover; The means cooperate with each other and work synergistically, which can not only realize the concept of green and sustainable development, but also improve the anti-aging properties of non-woven fabrics while improving the mechanical properties and corrosion resistance of mattress spring wrappings; at the same time, in the preparation process of cotton and linen blended mattress spring wrappings, it can effectively avoid the problems of difficult-to-control entanglement state, poor blending uniformity, difficult-to-control soft and hard styles, and unstable overall performance of mattress spring wrappings caused by inconsistent raw material fiber characteristics; effectively avoid fiber breakage during the combing process, and avoid fiber adhesion during the laying process, so as to improve the preparation yield of mattress spring wrappings.

[0021] (2) The cotton and linen blended mattress spring wrapping fabric of the present invention can realize the concept of green and sustainable development. While improving the anti-aging performance of the non-woven fabric, it also improves the mechanical properties and corrosion resistance of the mattress spring wrapping fabric. Moreover, the waste of the cotton and linen blended mattress spring wrapping fabric can be eliminated by burning. The burning process does not produce a melting point, which greatly reduces chemical pollutants.

[0022] (3) The cotton and linen blended mattress spring wrapping fabric of the present invention has good mechanical properties, with a longitudinal breaking strength of ≥282N and a transverse breaking strength of ≥305N; a longitudinal tearing strength of ≥92N and a transverse tearing strength of ≥83N; a longitudinal elongation at break of 50-65% and a transverse elongation at break of 57-75%; a longitudinal elongation of 45N of 5-10% and a transverse elongation of 45N of 8-15%; a longitudinal bending length of 6-14cm and a transverse bending length of 6-12cm.

[0023] (4) After being exposed to the sun for 1440 hours outdoors, the longitudinal and transverse breaking strength of the cotton and linen blended mattress spring wrapping fabric of the present invention can be maintained at 90-95% of the original, the longitudinal and transverse breaking elongation can be maintained at 90-95% of the original, and the longitudinal and transverse tearing strength can be maintained at 90-95% of the original, and the aging resistance is good.

[0024] (5) After the cotton and linen blended mattress spring covering fabric of the present invention is immersed in a 5% by mass hydrochloric acid aqueous solution for 720 hours, the longitudinal and transverse breaking strength can be maintained at 90-95% of the original, the longitudinal and transverse breaking elongation can be maintained at 90-95% of the original, and the longitudinal and transverse tearing strength can be maintained at 90-95% of the original; after being immersed in a 5% by mass sodium hydroxide aqueous solution for 720 hours, the longitudinal and transverse breaking strength can be maintained at 90-95% of the original, the longitudinal and transverse breaking elongation can be maintained at 90-95% of the original, and the longitudinal and transverse tearing strength can be maintained at 90-95% of the original, and the corrosion resistance is good. DETAILED DESCRIPTION

[0025] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods of the present invention are now described.

[0026] Example 1 This embodiment provides a method for preparing a cotton and linen blended mattress spring wrap, specifically comprising: 1. Raw material preparation The following fiber specifications are selected as raw material fibers: Polypropylene fiber, fineness is 2.5D, length is 76mm, fiber breaking strength is 4.6CN / dtex, and fiber breaking elongation is 43%.

[0027] Cotton-type viscose fiber, with a fineness of 5.5D, a length of 51mm, a fiber breaking strength of 1.3CN / dtex, and a fiber breaking elongation of 32%.

[0028] Natural hemp fiber, fineness is 15D, length is 30mm, fiber breaking strength is 3.1CN / dtex, and fiber breaking elongation is 2%.

[0029] 2. Opening, cleaning and mixing According to the weight ratio of 65:23:12, polypropylene fiber, cotton viscose fiber and natural hemp fiber are opened by the opening and cleaning machine and then enter the mixing box. After being evenly mixed in the mixing box, the cotton is grabbed and then finely opened and mixed to obtain the mixed fiber after opening and cleaning.

[0030] Among them, during the cotton picking process, the flat curtain running speed is controlled to be 1.5m / min, the inclined curtain running speed is 5m / min, and the cotton evenly running speed is 100m / min.

[0031] During the fine opening process, the cotton suction speed is controlled at 100m / min, the wind cotton speed is 100m / min, and the cotton averaging roller speed is 120m / min.

[0032] 3. Combing The mixed fiber after cleaning is fed into the carding machine for carding, and the fiber feed rate of the carding machine is controlled to be 23g / m 2 , the line speed is 42.5m / min (the line speed opening of the carding machine is 30%), the chest cylinder speed is 380m / min, the main cylinder speed is 1100m / min, the upper and lower doffer speeds are 110m / min, and the carded mixed fiber is obtained.

[0033] 4. Laying the net The carded mixed fiber is passed into a web laying machine for web laying, and the number of web laying layers is controlled to be 3 layers, the web laying width is 4.0m, the web laying output speed is 3m / min, the web laying tension is 0.7%, and the web laying overlap width is 100mm to obtain a uniform mixed cotton web.

[0034] The mixed cotton web has a width of 4.0 m, a flat surface and good uniformity.

[0035] 5. Acupuncture reinforcement The mixed cotton web was passed into a needle punching machine for three needle punching reinforcement processes to obtain a grey cloth with a mixed cotton web width of 3.7m, a smooth surface and good uniformity.

[0036] In the first needling process, the working width of the needling machine is controlled to be 3.9m, the needle density is 1500 pieces / m, the needling frequency is 400 times / min, and the production speed is 5m / min. In the second needling process, the working width of the needling machine is controlled to be 3.8m, the needle density is 10,000 pieces / m, the needling frequency is 550 times / min, and the production speed is 6m / min; In the third needling process, the working width of the needling machine is controlled to be 3.7m, the needle density is 10,000 pieces / m, the needling frequency is 580 times / min, and the production speed is 7m / min.

[0037] 6. Post-processing The grey cloth was subjected to hot pressing treatment, and the temperature of the hot pressing treatment was controlled to be 163° C., the gap between the pressing rollers was 0.3 mm, and the pressure of the pressing rollers was 800 psi. After the hot pressing treatment, it was cut as needed to obtain a cotton and linen blended mattress spring wrapping cloth.

[0038] The weight of the cotton and linen blended mattress spring wrap is 82g / m 2, thickness is 0.42mm, breaking strength: MD: 288N, CD: 310N; tear strength: MD: 97N, CD: 88N; elongation at break: MD: 55.32%, CD: 67.17%; elongation at 45N: MD: 7.23%, CD: 10.08%; bending length: MD: 10.08cm, CD: 8.23cm.

[0039] This embodiment also provides a cotton and linen blended mattress spring covering fabric, which is prepared by the aforementioned preparation method.

[0040] According to the test, the cotton and linen blended mattress spring cover fabric of this embodiment has a performance retention rate of 92% after being exposed to outdoor light for 1440 hours: the gram weight is 82g / m 2 , thickness is 0.42mm, breaking strength: MD: 264.96N, CD: 285.2N; tear strength: MD: 89.24N, CD: 80.96N; elongation at break: MD: 50.89%, CD: 61.8%; elongation at 45N: MD: 6.65%, CD: 9.27%; bending length: MD: 9.27cm, CD: 7.57cm.

[0041] The cotton and linen blended mattress spring wrapping cloth, after being soaked in a 5% hydrochloric acid aqueous solution for 720 hours, has a performance retention rate of 91%; the gram weight is 82g / m 2 , thickness is 0.42mm, breaking strength: MD: 262.08N, CD: 282.1N; tear strength: MD: 88.27N, CD: 80.08N; elongation at break: MD: 50.34%, CD: 61.12%; elongation at 45N: MD: 6.58%, CD: 9.17%; bending length: MD: 9.17cm, CD: 7.49cm.

[0042] Example 2 A method for preparing a cotton and linen blended mattress spring wrapping cloth, specifically comprising: 1. Raw material preparation The following fiber specifications are selected as raw material fibers: Polypropylene fiber, fineness is 3D, length is 73mm, fiber breaking strength is 4.7CN / dtex, and fiber breaking elongation is 44%.

[0043] Cotton-type viscose fiber, fineness is 5.7D, length is 58mm, fiber breaking strength is 1.5CN / dtex, and fiber breaking elongation is 33%.

[0044] Natural hemp fiber, fineness is 17D, length is 35mm, fiber breaking strength is 3.2CN / dtex, fiber breaking elongation is 2.5%.

[0045] 2. Opening, cleaning and mixing According to the weight ratio of 68:21:11, polypropylene fiber, cotton viscose fiber and natural hemp fiber are opened by the cleaning machine and then enter the mixing box. After being evenly mixed in the mixing box, the cotton is grabbed and then finely opened and mixed to obtain the mixed fiber after cleaning.

[0046] During the cotton picking process, the flat curtain running speed is controlled at 1.7m / min, the inclined curtain running speed is 5.4m / min, and the cotton evenly running speed is 105m / min.

[0047] During the fine opening process, the cotton suction speed is controlled at 102m / min, the wind cotton speed is 102m / min, and the cotton averaging roller speed is 125m / min.

[0048] 3. Combing The mixed fiber after cleaning is fed into the carding machine for carding, and the fiber feed rate of the carding machine is controlled to be 24g / m 2 , the line speed is 40m / min (the line speed opening of the carding machine is 28%), the chest cylinder speed is 370m / min, the main cylinder speed is 1150m / min, the upper and lower doffer speeds are 105m / min, and the carded mixed fiber is obtained.

[0049] 4. Laying the net The carded mixed fiber is passed into a web laying machine for web laying, and the number of web laying layers is controlled to be 3 layers, the web laying width is 3.9m, the web laying output speed is 3.2m / min, the web laying tension is 0.8%, and the web laying overlap width is 110mm to obtain a uniform mixed cotton web.

[0050] The mixed cotton mesh has a width of 3.9 m, a flat surface and good uniformity.

[0051] 5. Acupuncture reinforcement The mixed cotton web was passed into a needle punching machine for three needle punching reinforcement processes to obtain a grey cloth with a mixed cotton web width of 3.6m, a smooth surface and good uniformity.

[0052] Among them, in the first needling process, the working width of the needling machine is controlled to be 3.8m, the needle density is 1550 pieces / m, the needling frequency is 450 times / min, and the production speed is 5.5m / min; In the second needling process, the working width of the needling machine is controlled to be 3.7m, the needle density is 10250 pieces / m, the needling frequency is 590 times / min, and the production speed is 6.5m / min; In the third needling process, the working width of the needling machine was controlled to be 3.6m, the needle density was 10250 pieces / m, the needling frequency was 620 times / min, and the production speed was 7.5m / min.

[0053] 6. Post-processing The grey cloth was subjected to hot pressing treatment, and the temperature of the hot pressing treatment was controlled to be 165° C., the gap between the pressing rollers was 0.35 mm, and the pressure of the pressing rollers was 850 psi. After the hot pressing treatment, it was cut as needed to obtain a cotton and linen blended mattress spring wrapping cloth.

[0054] The weight of the cotton and linen blended mattress spring wrap is 78g / m 2 , thickness is 0.40mm, breaking strength: MD: 282N, CD: 305N; tear strength: MD: 92.4N, CD: 83.2N; elongation at break: MD: 58.22%, CD: 69.37%; elongation at 45N: MD: 8.53%, CD: 12.76%; bending length: MD: 9.17cm, CD: 7.29cm.

[0055] This embodiment also provides a cotton and linen blended mattress spring covering fabric, which is prepared by the aforementioned preparation method.

[0056] According to the test, the cotton and linen blended mattress spring cover fabric of this embodiment has a performance retention rate of 93.5% after being exposed to outdoor light for 1440 hours: the gram weight is 78g / m 2 , thickness is 0.40mm, breaking strength: MD: 263.67N, CD: 285.18N; tear strength: MD: 86.39N, CD: 77.79N; elongation at break: MD: 54.44%, CD: 64.86%; elongation at 45N: MD: 7.98%, CD: 11.93%; bending length: MD: 8.48cm, CD: 6.82cm.

[0057] The cotton and linen blended mattress spring wrapping cloth has a performance retention rate of 92.5% after being soaked in a 5% sodium hydroxide aqueous solution for 720 hours: the gram weight is 78g / m 2 , thickness is 0.40mm, breaking strength: MD: 260.85N, CD: 282.13N; tear strength: MD: 85.47N, CD: 76.96N; elongation at break: MD: 53.85%, CD: 64.17%; elongation at 45N: MD: 7.89%, CD: 11.80%; bending length: MD: 8.48cm, CD: 6.74cm.

[0058] Example 3 A method for preparing a cotton and linen blended mattress spring wrapping cloth, specifically comprising: 1. Raw material preparation The following fiber specifications are selected as raw fiber: Polypropylene fiber, fineness is 3.5D, length is 76mm, fiber breaking strength is 4.9CN / dtex, and fiber breaking elongation is 43%.

[0059] Cotton-type viscose fiber, fineness is 6D, length is 64mm, fiber breaking strength is 1.8CN / dtex, and fiber breaking elongation is 34%.

[0060] Natural hemp fiber, fineness is 20D, length is 40mm, fiber breaking strength is 3.4CN / dtex, fiber breaking elongation is 3%.

[0061] 2. Opening, cleaning and mixing According to the weight ratio of 70:20:10, polypropylene fiber, cotton viscose fiber and natural hemp fiber are opened by the cleaning machine and then enter the mixing box. After being evenly mixed in the mixing box, the cotton is grabbed and then finely opened and mixed to obtain the mixed fiber after opening and cleaning.

[0062] During the cotton picking process, the flat curtain running speed is controlled at 1.8m / min, the inclined curtain running speed is 5.7m / min, and the cotton evenly running speed is 108m / min.

[0063] During the fine opening process, the cotton suction speed is controlled at 103m / min, the wind cotton speed is 103m / min, and the cotton averaging roller speed is 127m / min.

[0064] 3. Combing The mixed fiber after cleaning is fed into the carding machine for carding, and the fiber feed rate of the carding machine is controlled to be 25g / m 2 , the line speed is 45m / min (the line speed opening of the carding machine is 32%), the chest cylinder speed is 380m / min, the main cylinder speed is 1200m / min, the upper and lower doffer speeds are 115m / min, and the carded mixed fiber is obtained.

[0065] 4. Laying the net The carded mixed fiber is passed into a web laying machine for web laying, and the number of web laying layers is controlled to be 4, the web laying width is 3.8m, the web laying output speed is 3.5m / min, the web laying tension is 0.9%, and the web laying overlap width is 120mm to obtain a uniform mixed cotton web.

[0066] The mixed cotton web has a width of 3.8 m, a flat surface and good uniformity.

[0067] 5. Acupuncture reinforcement The mixed cotton web was passed into a needle punching machine for three needle punching reinforcement processes to obtain a grey cloth with a mixed cotton web width of 3.5 m, a smooth surface and good uniformity.

[0068] In the first needling process, the working width of the needling machine is controlled to be 3.7m, the needle density is 1600 pieces / m, the needling frequency is 500 times / min, and the production speed is 6m / min. In the second needling process, the working width of the needling machine is controlled to be 3.6m, the needle density is 10,500 pieces / m, the needling frequency is 630 times / min, and the production speed is 7m / min; In the third needling process, the working width of the needling machine is controlled to be 3.5m, the needle density is 10,500 pieces / m, the needling frequency is 650 times / min, and the production speed is 8m / min.

[0069] 6. Post-processing The grey cloth was subjected to hot pressing treatment, and the temperature of the hot pressing treatment was controlled to be 168° C., the gap between the pressing rollers was 0.4 mm, and the pressure of the pressing rollers was 900 psi. After the hot pressing treatment, it was cut as needed to obtain a cotton and linen blended mattress spring wrapping cloth.

[0070] The weight of the cotton and linen blended mattress spring wrap is 84.7 g / m 2 , thickness is 0.47mm, breaking strength: MD: 316.2N, CD: 347.6N; tear strength: MD: 109.4N, CD: 103.2N; elongation at break: MD: 55.12%, CD: 60.39%; elongation at 45N: MD: 5.35%, CD: 8.67%; bending length: MD: 12.17cm, CD: 11.43cm.

[0071] This embodiment also provides a cotton and linen blended mattress spring covering fabric, which is prepared by the aforementioned preparation method.

[0072] According to the test, the cotton and linen blended mattress spring cover fabric of this embodiment has a performance retention rate of 94.5% after being exposed to outdoor light for 1440 hours: the gram weight is 84.7g / m 2 , thickness is 0.47mm, breaking strength: MD: 298.81N, CD: 328.48N; tear strength: MD: 103.38N, CD: 97.52N; elongation at break: MD: 52.09%, CD: 57.07%; elongation at 45N: MD: 5.06%, CD: 8.19%; bending length: MD: 11.50cm, CD: 10.80cm.

[0073] The cotton and linen blended mattress spring wrapping cloth has a performance retention rate of 93.5% after being soaked in a 5% hydrochloric acid aqueous solution for 720 hours: the gram weight is 84.7 g / m 2 , thickness is 0.47mm, breaking strength: MD: 295.65N, CD: 325.01N; tear strength: MD: 102.29N, CD: 96.49N; elongation at break: MD: 51.54%, CD: 56.46%; elongation at 45N: MD: 5.00%, CD: 8.11%; bending length: MD: 11.38cm, CD: 10.69cm.

[0074] Comparative Example 1 Comparative Example 1 adopts the scheme of Example 1, except that: 1) the weight ratio of polypropylene fiber, cotton viscose fiber and hemp fiber is adjusted to 80:15:5; 2) in the carding step, the fiber feed amount of the carding machine is controlled to 20g / m 2 The line speed is 49m / min (the carding machine line speed opening is 35%), the chest cylinder speed is 350m / min, the main cylinder speed is 1000m / min, and the upper and lower doffer speed is 100m / min.

[0075] The weight of the cotton and linen blended mattress spring wrapping fabric prepared in Comparative Example 1 is 81.7 g / m 2 , thickness is 0.43mm, breaking strength: MD: 230.2N, CD: 242.6N; tear strength: MD: 75.3N, CD: 63.2N; elongation at break: MD: 45.12%, CD: 50.39%; elongation at 45N: MD: 4.35%, CD: 6.67%; bending length: MD: 14.27cm, CD: 12.13cm.

[0076] After testing, the cotton and linen blended mattress spring cover fabric of comparative example 1 has a performance retention rate of 61.5% after being exposed to outdoor sunlight for 1440 hours: the gram weight is 81.7g / m 2 , thickness is 0.43mm, breaking strength: MD: 141.57N, CD: 149.20N; tear strength: MD: 46.31N, CD: 38.87N; elongation at break: MD: 27.75%, CD: 30.99%; elongation at 45N: MD: 2.68%, CD: 4.10%; bending length: MD: 8.78cm, CD: 7.46cm.

[0077] The cotton and linen blended mattress spring wrapping cloth has a performance retention rate of 63.7% after being soaked in a 5% hydrochloric acid aqueous solution for 720 hours: the gram weight is 81.7 g / m 2 , thickness is 0.43mm, breaking strength: MD: 146.64N, CD: 154.54N; tear strength: MD: 47.97N, CD: 40.26N; elongation at break: MD: 28.74%, CD: 32.10%; elongation at 45N: MD: 2.77%, CD: 4.25%; bending length: MD: 9.09cm, CD: 7.73cm.

[0078] It can be seen that the preparation method of the cotton-linen blended mattress spring wrapping cloth of the present invention selects raw materials (polypropylene fiber, cotton viscose fiber, natural linen fiber) of specific specifications, and performs opening and cleaning mixing (including opening, cotton grabbing, and fine opening) of the above raw materials in a specific ratio to obtain mixed fibers after opening and cleaning; then performs combing with specific process parameters to obtain the combed mixed fibers; then performs web laying to obtain a mixed cotton web; then performs three needle punching reinforcement processes on the mixed cotton web to obtain a grey cloth; the grey cloth is post-treated to obtain a cotton-linen blended mattress spring wrapping cloth; the above-mentioned technical means cooperate and work synergistically with each other, which can not only realize the concept of green and sustainable development, but also improve the mechanical properties and corrosion resistance of the mattress spring wrapping cloth while improving the anti-aging performance of the non-woven fabric; at the same time, in the preparation process of the cotton-linen blended mattress spring wrapping cloth, it can effectively avoid the problems of difficult control of the entanglement state, poor blending uniformity, difficult control of the soft and hard style, and unstable overall performance of the mattress spring wrapping cloth due to inconsistent raw material fiber characteristics; effectively avoid fiber breakage during combing and fiber adhesion during web laying, and improve the preparation yield of the mattress spring wrapping cloth.

[0079] Specifically, in the preparation method of the cotton and linen blended mattress spring covering cloth of the present invention, three specific specifications of raw materials (polypropylene fiber, cotton viscose fiber, natural linen fiber) are combined with a specific ratio, and a specific opening and cleaning mixture (including opening, cotton grabbing, and fine opening processes) is adopted to improve the blending uniformity of the raw material fibers, and through combing with specific process parameters, the breakage of the raw material fibers during the combing process is effectively avoided, thereby reducing the difficulty of combing; through laying with specific process parameters, the fiber adhesion during the laying process is effectively avoided; and through needle punching reinforcement with specific process parameters, the problem of difficult-to-control entanglement due to inconsistent raw material fiber characteristics is effectively avoided; and through post-processing, the soft and hard style control of the mattress spring covering cloth is reduced.

[0080] According to the preparation test in the embodiment, the prepared cotton and linen blended mattress spring cover has a longitudinal breaking strength of 282-298.81N and a transverse breaking strength of 305-328.48N; a longitudinal tearing strength of 92.4-103.38N and a transverse tearing strength of 83.2-97.52N; a longitudinal elongation at break of 52.09-58.22% and a transverse elongation at break of 57.07-69.37%; a 45N longitudinal elongation of 5.06-8.53% and a 45N transverse elongation of 8.19-12.76%; a longitudinal bending length of 9.17-11.50cm and a transverse bending length of 7.29-10.80cm.

[0081] It can be seen from Comparative Example 1 that after changing the raw material composition of the cotton and linen blended mattress spring covering cloth and changing the combing-related process parameters, the mechanical properties of the obtained cotton and linen blended mattress spring covering cloth are significantly reduced; at the same time, after being exposed to outdoor light for 1440 hours or acid treated for 720 hours, the performance retention rate is greatly reduced.

[0082] Unless otherwise specified, all percentages used in the present invention are by mass.

[0083] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for preparing a cotton and linen blended mattress spring wrap, characterized in that: The following steps are included: cleaning and mixing, combing, web laying, needle punching and reinforcement, and post-processing; The method for opening, cleaning and mixing is as follows: polypropylene fiber, cotton viscose fiber and natural hemp fiber are opened by an opening and cleaning machine and then enter a mixing box, and then the fibers are evenly mixed in the mixing box and then picked up, and then finely opened, loosened and mixed to obtain mixed fibers after opening and cleaning; The combing method comprises: passing the mixed fibers after cleaning into a combing machine for combing to obtain the combed mixed fibers; The web laying method is to pass the combed mixed fiber into a web laying machine for web laying, and control the number of web laying layers to be 3-4 layers to obtain a mixed cotton web; The needle punching reinforcement method is to pass the mixed cotton web into a needle punching machine for three needle punching reinforcement processes to obtain a grey cloth with a mixed cotton web width of 3.5-3.7m; The grey cloth is post-processed to obtain cotton and linen blended mattress spring wrapping cloth.

2. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: Polypropylene fiber, fineness is 2.5-3.5D, length is 70-76mm, fiber breaking strength is 4.5-5CN / dtex, fiber breaking elongation is 40-50%; Cotton-type viscose fiber, fineness is 5.5-6D, length is 51-64mm, fiber breaking strength is 1-2CN / dtex, fiber breaking elongation is 30-35%; Natural hemp fiber has a fineness of 15-20D, a length of 30-40mm, a fiber breaking strength of 3-3.5CN / dtex, and a fiber breaking elongation of 0.1-5%.

3. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: In the cleaning mixture, the weight ratio of polypropylene fiber, cotton viscose fiber and natural hemp fiber is 65-70:20-23:10-12.

4. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: In the cleaning and mixing, the running speed of the flat curtain is controlled to be 1.5-2m / min, the running speed of the inclined curtain is controlled to be 5-6m / min, and the running speed of the cotton is controlled to be 100-110m / min during the cotton picking process.

5. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: In the opening, cleaning and mixing, the cotton suction speed is controlled to be 100-105m / min, the wind cotton speed is controlled to be 100-105m / min, and the cotton roller speed is controlled to be 120-130m / min during the fine opening process.

6. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: During the carding process, the fiber feed rate of the carding machine is controlled to be 23-25 ​​g / m 2 The line speed is 40-45m / min, the chest cylinder speed is 370-390m / min, the main cylinder speed is 1100-1200m / min, and the upper and lower doffer speed is 105-115m / min.

7. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: In the web laying, the web laying width is 3.8-4m, the web laying output speed is 3-3.5m / min, the web laying tension is 0.7-0.9%, and the web laying overlap width is 100-120mm.

8. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: In the three needling reinforcement processes of the needling reinforcement, in the first needling process, the working width of the needling machine is controlled to be 3.7-3.9m, the needle density is 1500-1600 pieces / m, the needling frequency is 400-500 times / min, and the production speed is 5-6m / min; In the second needling process, the working width of the needling machine is controlled to be 3.6-3.8m, the needle density is 10000-10500 pieces / m, the needling frequency is 550-630 times / min, and the production speed is 6-7m / min; In the third needling process, the working width of the needling machine is controlled to be 3.5-3.7m, the needle density is 10000-10500 pieces / m, the needling frequency is 580-650 times / min, and the production speed is 7-8m / min.

9. The method for preparing the cotton and linen blended mattress spring wrapping cloth according to claim 1, characterized in that: The post-treatment method is to perform hot pressing treatment on the grey cloth, control the hot pressing treatment temperature to be 163-168° C., the roller gap to be 0.3-0.4 mm, and the roller pressure to be 800-900 psi, and obtain the cotton and linen blended mattress spring wrap after the hot pressing treatment.

10. A cotton and linen blended mattress spring wrapping fabric, characterized in that: The cotton and linen blended mattress spring wrapping fabric has a gram weight of 80±5 g / m 2 , thickness is 0.4±0.1mm, longitudinal breaking strength ≥280N, transverse breaking strength ≥300N; longitudinal tearing strength ≥90N, transverse tearing strength ≥80N; longitudinal elongation at break is 50-65%, transverse elongation at break is 60-75%; 45N longitudinal elongation is 5-10%, 45N transverse elongation is 8-15%; longitudinal bending length is 6-14cm, transverse bending length is 6-12cm.