CN114941205A - Coloring process of hot air non-woven fabric - Google Patents
Coloring process of hot air non-woven fabric Download PDFInfo
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- CN114941205A CN114941205A CN202210436455.2A CN202210436455A CN114941205A CN 114941205 A CN114941205 A CN 114941205A CN 202210436455 A CN202210436455 A CN 202210436455A CN 114941205 A CN114941205 A CN 114941205A
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 152
- 238000004040 coloring Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 title claims abstract description 37
- 239000000835 fiber Substances 0.000 claims abstract description 246
- 239000002344 surface layer Substances 0.000 claims abstract description 206
- 239000012792 core layer Substances 0.000 claims abstract description 140
- 239000003086 colorant Substances 0.000 claims abstract description 98
- 239000004595 color masterbatch Substances 0.000 claims abstract description 93
- 239000000463 material Substances 0.000 claims abstract description 93
- 238000002156 mixing Methods 0.000 claims abstract description 39
- 238000007596 consolidation process Methods 0.000 claims abstract description 35
- 238000002074 melt spinning Methods 0.000 claims abstract description 17
- 239000012467 final product Substances 0.000 claims abstract description 14
- 238000009960 carding Methods 0.000 claims abstract description 13
- 239000011162 core material Substances 0.000 claims description 85
- 239000002994 raw material Substances 0.000 claims description 22
- 238000007602 hot air drying Methods 0.000 claims description 11
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000001035 drying Methods 0.000 description 56
- 238000002360 preparation method Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 9
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- 239000002657 fibrous material Substances 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
- D04H1/43825—Composite fibres
- D04H1/43828—Composite fibres sheath-core
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/04—Pigments
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
- D04H1/5412—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres sheath-core
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
Abstract
The invention relates to a coloring process of a hot-air non-woven fabric, which comprises the following steps: step 1, determining the core layer color, the surface layer color and the color expression form of the colored bicomponent fiber according to the color requirement of a final product and the principle that the surface layer color can be toned according to the toning principle and the core layer color is not toned; then, respectively adding the color master batches with the selected colors into a surface layer material and/or a core layer material, and carrying out melt spinning to prepare a plurality of colored bicomponent fibers with required color expression forms; and 2, determining the proportion of the colored bicomponent fibers in a plurality of required color expression forms, then opening and mixing, carding to form a net, and then performing hot air consolidation to obtain the colored hot air non-woven fabric. The method of the invention is adopted to color the non-woven fabric, and only the color master batches with three colors of red, green and blue are needed to be purchased and stored, so that the production of the non-woven fabrics with various colors can be realized according to the requirements, the supply chain is simplified, and the multi-color non-woven fabrics can be produced, thereby enriching the colors of the non-woven fabrics.
Description
Technical Field
The invention relates to the technical field of non-woven fabrics, in particular to a coloring process of a hot-air non-woven fabric.
Background
At present, the coloring mode of the non-woven fabric mainly has two modes, one mode is an ink printing mode, the non-woven fabric has the advantages that the patterns are rich and various, but the problems exist: 1) the pigment cannot be prepared by a collinear one-step method with non-woven fabrics, and the production cost is high; 2) the printing ink is easy to dissolve out and brings potential safety hazards; 3) the printing process is not environmentally friendly. The other mode is to adopt monochromatic colored fibers to prepare the non-woven fabric, and the non-woven fabric has the advantages of no pollution, environmental friendliness, no pigment dissolution problem, low potential safety hazard and the following defects: 1) the color is single, and in terms of the prior art, the prepared non-woven fabric is only single-color non-woven fabric and cannot produce multi-color non-woven fabric; 2) the colored fiber is prepared by adding color master batches with single color into the surface fiber raw material, and the more the colors of the produced non-woven fabrics are, the more the color master batches or the fibers are stored, thus increasing the complexity of a supply chain; and the production line carries out the colour and changes frequently, and every change all needs clearance production line, and the loss is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a coloring process of a hot-air non-woven fabric, which can realize the production of the non-woven fabrics with various colors according to the requirements by purchasing and storing color master batches with three colors of red, green and blue, simplifies the supply chain, can also produce multi-color non-woven fabrics and enriches the colors of the non-woven fabrics.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
the technical scheme I is as follows:
a coloring process of a hot-air non-woven fabric is characterized in that the hot-air non-woven fabric is prepared from bicomponent fibers with a sheath-core structure, wherein the surface layer material of the bicomponent fibers is made of low-melting-point resin, and the core material is made of high-melting-point resin; the coloring process of the hot air non-woven fabric comprises the following steps:
a coloring process of a hot-air non-woven fabric is characterized in that the hot-air non-woven fabric is prepared from bicomponent fibers with a sheath-core structure, wherein the surface layer material of the bicomponent fibers is made of low-melting-point resin, and the core material is made of high-melting-point resin; the coloring process of the hot air non-woven fabric comprises the following steps:
step 1, according to the color requirement of a final product and the principle that the surface color can be toned according to the toning principle, but the core color is not toned, determining the core color and the surface color of the colored bicomponent fiber, and determining the color expression form of the required colored bicomponent fiber; then according to the determined color types of the core layer color and the surface layer color of the colored bicomponent fiber, selecting the color of the color master batch, respectively adding the color master batch with the selected color into the surface layer material and/or the core layer material, and carrying out melt spinning to completely wrap the core material by the surface layer material so as to prepare the colored bicomponent fiber with a plurality of required color expression forms;
when a surface layer material added with color master batches and a core material not added with the color master batches are used as raw materials, the prepared colored bicomponent fiber is a monochromatic bicomponent fiber with the color on the surface layer;
when a surface layer material without the color master batch and a core material with the color master batch are used as raw materials, the prepared colored bicomponent fiber is a core material monochromatic bicomponent fiber with the color in a core layer;
when a surface layer material added with color master batches and a core material added with the color master batches are used as raw materials, the prepared colored bicomponent fiber is a colored bicomponent fiber with the surface layer and the core layer both having colors, when the colors of the surface layer and the core layer of the colored bicomponent fiber with the colors are the same, the prepared colored bicomponent fiber is a monochromatic bicomponent fiber with the surface layer and the core layer having the same colors, and when the colors of the surface layer and the core layer of the colored bicomponent fiber with the colors are different, the prepared colored bicomponent fiber is a bicolor bicomponent fiber with the surface layer and the core layer having different colors;
and 2, determining the proportion of the colored bicomponent fibers with the plurality of required color expression forms prepared in the step 1 according to the color requirement of a final product, then opening and mixing, carding to form a net, and then performing hot air consolidation to obtain the colored hot air non-woven fabric.
Furthermore, the dosage of the surface layer material and the core layer material can adopt the conventional dosage in the prior art, and also can adopt the dosage of the surface layer material and the core layer material with the mass ratio of 1: 1;
further, in the step 2, when opening and mixing, the surface layer monochromatic bicomponent fibers with different colors are adopted, the prepared colored hot air non-woven fabric is the monochromatic hot air non-woven fabric, and the color of the monochromatic hot air non-woven fabric is the color presented after the color of the adopted surface layer monochromatic bicomponent fibers is matched according to the color matching principle.
Further, in step 2, when opening and mixing, only 1 color core layer single color bicomponent fiber is used, and the prepared colored hot air non-woven fabric is a single color hot air non-woven fabric, and the color of the single color hot air non-woven fabric is the color presented by the adopted surface layer single color bicomponent fiber.
Further, in step 2, when opening and mixing, the core layer monochromatic two-component fibers with n different colors are adopted, the color of the prepared colored hot air non-woven fabric is multi-color hot air non-woven fabric, the multi-color hot air non-woven fabric has n colors, the colors of the core layer monochromatic two-component fibers with n different colors are respectively the colors presented independently, and the color of the multi-color hot air non-woven fabric is the color mixture color of multiple independent colors of the core material monochromatic two-component fibers.
Further, in the step 2, when opening and mixing, surface layer monochromatic bicomponent fibers and 1 core layer monochromatic bicomponent fiber of various different colors are adopted, so that the multi-color hot air non-woven fabric is prepared, and the multi-color hot air non-woven fabric has 2 colors, namely the color presented by the surface layer monochromatic bicomponent fiber after color matching according to a color matching principle and the color presented by the core layer monochromatic bicomponent fiber; the color of the multi-color hot air non-woven fabric is the surface color which is presented after the monochromatic bicomponent fiber is matched according to the color matching principle, and the color presented by the monochromatic bicomponent fiber of the core layer is the core layer color;
in step 2, when opening and mixing, adopting a plurality of different colors of surface layer monochromatic bicomponent fibers and n core layer monochromatic bicomponent fibers, and obtaining the multi-color hot air non-woven fabric, wherein the colors of the multi-color hot air non-woven fabric have n +1 colors, which are respectively: n colors which are independently presented by the single-color bicomponent fiber at the core layer and colors which are presented by the single-color bicomponent fiber at the surface layer after color matching according to the color matching principle; the color of the multi-color hot air non-woven fabric is the surface color which is presented after the surface layer monochromatic bicomponent fiber is matched according to the color matching principle; the color of the core layer is the mixed color of the single-color bicomponent fiber of the n core layers which independently presents the color.
Further, in step 2, when opening and mixing, adopting a plurality of different colors of monochromatic bicomponent fibers on the surface layer and n types of colored bicomponent fibers with the surface layer and the core layer having colors, so as to obtain the multicolor hot-air non-woven fabric, wherein the colors of the multicolor hot-air non-woven fabric have n +1 colors, which are respectively: the color of the core layer of the n types of colored bicomponent fibers with the colors of the surface layer and the core layer is independently shown, and the color of the surface layer of the n types of colored bicomponent fibers with the colors of the surface layer and the core layer and the color of the single-color bicomponent fibers with different colors on the surface layer are shown after color matching according to the color matching principle; the color of the multicolor hot-air non-woven fabric is the surface color of the colored bicomponent fiber with n types of surface layers and core layers having colors and the color presented by the monochromatic bicomponent fiber with a plurality of different colors on the surface layer after color matching according to the color matching principle; the color of the core layer is the mixed color of the color independently presented by the core layer fiber of the colored bicomponent fiber with the n surface layers and the core layer.
Further, the low-melting-point resin adopts PE or modified PET (COPET);
the high-melting-point resin adopts PP or PET.
Further, in the step 1, the addition amount of the color master batch is 0.1-5% of the weight of the surface material or the core material.
Further, in step 1, the amount of the color master batch added is 0.8-2% of the weight of the skin material or the core material.
Further, the temperature of the hot air consolidation is 110-150 ℃; the air quantity of the hot air consolidation is as follows: 20 to 80 percent.
Furthermore, the hot air oven is formed by sequentially connecting a plurality of oven sections, the oven sections are equal in length, the fiber is laid into a net and then moves forwards in the hot air oven at a constant speed, and the total time of the fiber passing through the oven sections is controlled to be more than 0.06 min.
Furthermore, the hot air consolidation is carried out in a hot air drying oven, the temperature and the air quantity of the hot air consolidation are both increased and then reduced, the hot air temperature of the first section of drying oven of the hot air drying oven is 130-134 ℃, and the hot air temperature of the last section of drying oven is 132-140 ℃; the middle maximum temperature of hot air consolidation is less than or equal to 142 ℃; the hot air volume of the first section of the hot air oven is 44-50%, the hot air volume of the last section of the hot air oven is 44-50%, and the maximum air volume in the middle of hot air consolidation is less than or equal to 59%.
Furthermore, the number of the hot air drying ovens is 4, the temperature of the first drying oven is set to be 128-138 ℃, and the air volume is 42-50%; setting the temperature of the second section of the drying oven at 130-150 ℃ and the air volume at 45-60%; setting the temperature of the third section of drying oven at 130-150 ℃, and setting the air quantity at 45-60%; setting the temperature of the fourth section of drying oven at 130-150 ℃ and the air volume at 45-60%;
or, the hot air drying oven is 4 sections, the temperature of the first section of drying oven is set to be 128-138 ℃, and the air volume is 42-50%; setting the temperature of the second section of drying oven at 130-150 ℃, and setting the air quantity at 45-60%; setting the temperature of the third section of drying oven at 130-150 ℃ and the air volume at 45-60%; setting the temperature of the fourth section of drying oven at 130-150 ℃ and the air volume at 45-60%;
or, the hot air drying oven has 5 sections, the temperature of the first section of drying oven is set to be 128-138 ℃, and the air volume is 42-50%; setting the temperature of the second section of the drying oven at 130-150 ℃ and the air volume at 45-60%; setting the temperature of the third section of drying oven at 130-150 ℃ and the air volume at 45-60%; setting the temperature of the fourth section of drying oven at 130-150 ℃ and the air volume at 45-60%; the temperature of the fifth section of the drying oven is set to be 130-150 ℃, and the air volume is 42-45%.
Furthermore, the number of the hot air drying ovens is 4, the temperature of the first drying oven is 132-; setting the temperature of the second section of the drying oven at 140 ℃ and 142 ℃, and setting the air volume at 52-55%; setting the temperature of a third section of drying oven at 140-142 ℃, and setting the air volume at 52-55%; setting the temperature of the fourth section of the drying oven at 140 ℃ and the air volume at 45-50%;
or, the hot air drying oven is 4 sections, the temperature of the first section of drying oven is set to 130-132 ℃, and the air volume is 44-50%; setting the temperature of the second section of the drying oven at 138-141 ℃, and setting the air volume at 50-53%; setting the temperature of a third section of drying oven at 140-142 ℃, and setting the air volume at 52-55%; setting the temperature of a fourth section of drying oven at 136-140 ℃, and setting the air quantity at 45-50%;
or, the hot air drying oven is 5 sections, the temperature of the first section of drying oven is set to 130-132 ℃, and the air volume is 44-46%; setting the temperature of the second section of the drying oven at 135-138 ℃ and the air volume at 47-50%; setting the temperature of the third section of the drying oven at 140-142 ℃, and setting the air volume at 55-59%; setting the temperature of a fourth section of drying oven at 138-142 ℃, and setting the air volume at 45-50%; setting the temperature of the fifth section of the drying oven at 133-136 ℃, and setting the air volume at 44-47%;
or the hot air drying oven has 6 sections, the temperature of the first section of drying oven is set to be 128-130 ℃, and the air volume is 42-46%; setting the temperature of the second section of the drying oven at 132-; setting the temperature of the third section of the drying oven at 135-138 ℃ and the air volume at 52-55%; setting the temperature of the fourth section of drying oven at 138-142 ℃ and the air volume at 48-52%; setting the temperature of the fifth section of the drying oven at 133-136 ℃, and setting the air volume at 42-46%; the temperature of the sixth section of the drying oven is set to be 130-135 ℃, and the air volume is 40-45%.
Compared with the prior art, the invention has the following beneficial effects:
1. based on the characteristic that the hot-air non-woven fabric needs to use the bicomponent fiber, the color master batch is added into different layers (surface layers and/or core materials) of the bicomponent fiber with the sheath-core structure, so that the preparation of different colored fibers is realized; when the core layer monochromatic fibers with different colors are used for preparing the non-woven fabric, the core layer fibers only realize point-shaped bonding but not area bonding by controlling the temperature and the air quantity of hot air consolidation, so that the core layer monochromatic fibers can keep the original color, and the color matching phenomenon is not generated, thereby preparing the multicolor hot air non-woven fabric, in addition, the invention can also utilize the surface layer monochromatic non-woven fabric and the core layer monochromatic non-woven fabric with different colors to prepare the multicolor hot air non-woven fabric with various colors, and the matching of main colors and auxiliary colors can be realized by adjusting the total amount of the color master batches of the surface layer material and the core layer material used by the non-woven fabric (which is determined by the adding proportion of the color master batches in the surface layer material or the core layer material and the amount proportion of the core layer material and the surface layer material during spinning and the amount of each colored bicomponent fiber during mixing), enriches the color of the non-woven fabric product and improves the color selectivity of consumers.
2. The invention can realize the area bonding instead of the point bonding when the surface layer monochromatic hot-air non-woven fabric is solidified by hot air by controlling the temperature and the air quantity of the hot air solidification, so that a new color of the non-woven fabric can be produced by the color toning principle (the new color is obtained by color matching of the color of the adopted single-color surface layer bi-component fiber, and the color is different from the original color of the adopted single-color surface layer bi-component fiber after color matching, for example, according to the color toning principle, the combination of green and red can generate yellow, and the combination of green and blue can generate cyan, red and blue can generate purple), so that, when the raw materials are purchased and stored, the hot air non-woven fabrics with various colors can be produced by purchasing the color master of the basic primary colors of red, green and blue through the color matching principle, the raw material types of the supply chain are simplified, meanwhile, material damage and cost increase caused by frequent color change of a production line in the traditional technology are avoided.
3. The invention strictly controls the temperature and the air quantity of the hot air consolidation to ensure that the temperature and the air quantity of the hot air consolidation are in the trend of changing from rising to falling, thereby achieving the purposes of strictly controlling the bonding state of surface layer fibers and core material fibers, ensuring that the hot air non-woven fabric has uniform and stable color and no color error among batches.
4. When the hot air is solidified, the temperature of the hot air in the first section of the drying oven is controlled to be 130-134 ℃, and the temperature of the hot air in the last section of the drying oven is controlled to be 133-140 ℃; the middle maximum temperature of hot air consolidation is less than or equal to 142 ℃; the hot air volume of the first section of drying oven is 44-50%, the hot air volume of the last section of drying oven is 44-50%, and the middle maximum air volume of hot air consolidation is less than or equal to 59%; therefore, the prepared non-woven fabric has good performance, the softness and the wear-resistant grade reach the standard, and the non-woven fabric is bright in color, uniform and stable.
Detailed Description
The present invention will be described in further detail with reference to examples.
Example 1
Taking the preparation of a single-color non-woven fabric with purple color on surface layer fibers as an example, a coloring process of a hot air non-woven fabric is introduced, and comprises the following steps:
step 1, selecting materials: the surface layer material of the bicomponent fiber is PE, and the core material is PET; the dosage of the surface layer material and the core layer material is 1: 1;
step 2, preparing colored cellosilk: according to the color requirement of a final product and the principle that the surface color can be toned according to the toning principle and the core color is not toned, determining the core color and the surface color of the colored bicomponent fiber and determining the color expression form of the required colored bicomponent fiber; then respectively adding red color master batches and blue color master batches into the surface layer material according to the addition amount of 1.3 percent of the color master batches, taking the surface layer material added with the red color master batches and the core material not added with the color master batches as raw materials, and carrying out melt spinning to completely wrap the core material by the surface layer material so as to prepare the surface layer monochromatic bicomponent fiber with a red surface layer; the surface layer material added with blue color master batch and the core material not added with the color master batch are taken as raw materials, and melt spinning is carried out, so that the core material is completely wrapped by the skin layer material, and the surface layer monochromatic bicomponent fiber with blue surface layer is prepared for standby;
since the coloring color of the non-woven fabric prepared in the embodiment is on the surface layer fiber, the step needs to prepare the bicomponent fiber with the color on the surface layer, and the core layer is the natural color (white) of the fiber, and no color master batch is added; in addition, the non-woven fabric of the embodiment requires purple, and purple is obtained by combining red and blue according to a color mixing principle, so that the step needs to prepare the surface layer monochromatic bicomponent fiber with the color of red and the surface layer monochromatic bicomponent fiber with the color of blue;
step 3, opening, mixing and carding to form a net: selecting surface layer monochromatic bicomponent fibers with red and blue colors according to the color requirement and the toning principle of a final product, then opening and mixing the surface layer monochromatic bicomponent fibers with the two colors according to the mass ratio of 1: 1, and carding to form a web;
step 4, hot air consolidation: carrying out hot air consolidation on the fibers carded into the web in a hot air oven to obtain colored hot air non-woven fabric;
the hot air oven adopted in the embodiment is provided with 4 sections of ovens which are arranged in sequence, the fiber carded into the web passes through the 4 sections of ovens at a constant speed, and the total time for passing through the 4 sections of ovens is controlled to be more than or equal to 0.06 min;
setting the temperature of a first section of drying oven to 133 ℃, and setting the air volume to 47%; setting the temperature of a second section of oven to be 141 ℃, and setting the air volume to be 53%; setting the temperature of a third section of oven to be 141 ℃, and setting the air volume to be 54%; setting the temperature of a fourth section of drying oven to be 138 ℃, and setting the air volume to be 48%;
under the above-mentioned parameter setting of hot air consolidation, the surface layer fiber realizes "regional bonding", the core material fiber realizes "point bonding", after the surface layer fiber color red and blue are evenly fused together, the mixing of colors becomes new color purple, therefore, the colored hot air non-woven fabrics prepared by this embodiment are purple on the surface layer, and only have colored hot air non-woven fabrics of single color.
Example 2
Taking a multi-color hot air non-woven fabric which is prepared, has colors in a core layer and is in blue-green mixed color (multi-color patterns which are uniformly mixed and tiled in blue-green) as an example, the coloring process of the hot air non-woven fabric is introduced, and comprises the following steps:
step 1, selecting materials: the surface layer material of the bicomponent fiber adopts PE with low melting point, and the core material adopts PET with high melting point; the dosage of the surface layer material and the core layer material is 1: 1;
step 2, preparing colored cellosilk: determining the core layer color and the surface layer color of the colored bicomponent fiber and determining the color expression form of the required colored bicomponent fiber according to the color requirement of the final product and the principle that the surface layer color can be toned according to the toning principle and the core layer color is not toned; then, according to the addition amount of 1.3 percent of color master batch, respectively adding blue color master batch and green color master batch into the core layer material, taking a surface layer material added with the blue color master batch and a core material not added with the color master batch as raw materials, carrying out melt spinning, completely wrapping the core material by using a skin layer material, and preparing the core layer monochromatic bicomponent fiber with the blue core layer; the surface layer material added with green color master batch and the core material not added with the color master batch are taken as raw materials, and melt spinning is carried out, so that the core material is completely wrapped by the surface layer material, and the core layer monochromatic bicomponent fiber with the green core layer is prepared for standby;
because the coloring color of the non-woven fabric prepared by the embodiment is on the core layer fiber, the step needs to prepare the bicomponent fiber with the color on the core layer, and the surface layer is the natural color (white) of the fiber, and no color master batch is added; in addition, the non-woven fabric prepared according to the embodiment is required to be a multi-color non-woven fabric with blue-green mixed color (multi-color patterns formed by uniformly mixing and tiling blue and green), so that the color of the non-woven fabric is obtained by uniformly mixing the core material monochromatic bi-component fiber with the blue core material and the core material bi-component fiber with the green core material;
step 3, opening, mixing and carding to form a net: selecting core layer single-color bicomponent fibers with blue and green colors according to the color requirement of a final product, then opening and mixing the core material single-color bicomponent fibers with the two colors according to the mass ratio of 1: 1, and carding to form a web;
step 4, hot air consolidation: and (3) performing hot air consolidation on the fibers carded into the web in a hot air oven to obtain the colored hot air non-woven fabric.
The hot air oven adopted in the embodiment is provided with 4 sections of ovens which are arranged in sequence, the carded fibers pass through the 4 sections of ovens at a constant speed, and the total time for passing through the 4 sections of ovens is controlled to be more than or equal to 0.06 min;
setting the temperature of the first section of oven to be 131 ℃, and setting the air volume to be 47%; setting the temperature of the second section of oven to 139 ℃ and the air volume to 52%; setting the temperature of a third section of oven to be 141 ℃, and setting the air volume to be 53%; setting the temperature of the fourth section of oven to 138 ℃ and the air volume to 48%;
under the parameter setting of foretell hot-blast consolidation, regional bonding is realized to the surface layer fibre, and the colour is fibrous nature look white, and the sandwich layer fibre is the point bonding, blue sandwich layer fibre and green sandwich layer fibre homogeneous mixing, still be independent, because be the point bonding, consequently be homogeneous mixing rather than fusing, do not take place the mixing of colors phenomenon, but become the multicolour pattern of blue-green homogeneous mixing tiling, consequently, the coloured hot-blast non-woven fabrics of this embodiment preparation is blue-green colour mixture, the multicolour hot-blast non-woven fabrics that has 2 colours for the sandwich layer.
Example 3
By taking the preparation of the multicolor hot-air non-woven fabric with red as the main core layer and purple as the auxiliary surface layer as an example, the coloring process of the hot-air non-woven fabric is introduced, and comprises the following steps:
step 1, selecting materials: the surface layer material of the bicomponent fiber adopts PE with low melting point, and the core material adopts PET with high melting point; the dosage of the surface layer material and the core layer material is 1: 1;
step 2, preparing colored cellosilk: according to the color requirement of a final product and the principle that the surface color can be toned according to the toning principle and the core color is not toned, determining the core color and the surface color of the colored bicomponent fiber and determining the color expression form of the required colored bicomponent fiber; then respectively adding red color master batch and blue color master batch into the surface layer material according to the addition of 1.3 percent of the color master batch, and adding the red color master batch into the core layer material; then, the surface layer material added with red color master batch and the core material not added with the color master batch are taken as raw materials, and melt spinning is carried out, so that the core material is completely wrapped by the surface layer material, and the core layer monochromatic bicomponent fiber with the red surface layer is prepared; the surface layer material added with blue color master batch and the core material not added with the color master batch are taken as raw materials, and melt spinning is carried out, so that the core material is completely wrapped by the surface layer material, and the core layer monochromatic bicomponent fiber with blue surface layer is prepared; the surface layer material without the color master batch and the core material with the red color master batch are used as raw materials, and melt spinning is carried out, so that the core material is completely wrapped by the surface layer material, and the core layer monochromatic bicomponent fiber with the red core layer is prepared for standby;
because the coloring color of the non-woven fabric prepared by the embodiment is mainly purple and secondarily red, purple is required to be on the surface layer fiber, and red is required to be on the core layer fiber, and according to the color matching principle, purple of the surface layer is formed by combining red and blue, so that the fiber materials required to be prepared in the step are 3 types as follows: 1) the core layer is a red single-color core layer bicomponent fiber, the surface layer is the natural color (white) of the fiber, and color master batches are not added; 2) the surface layer is red, the core material is the natural color (white) of the fiber, and color master batches are not added; 3) the surface layer is a blue surface layer monochromatic bicomponent fiber, the core material is the natural color (white) of the fiber, and no color master batch is added;
step 3, opening, mixing and carding to form a net: selecting red and blue surface layer monochromatic bicomponent fibers and red bicomponent fibers according to the color requirement of a final product, and then mixing the red surface layer monochromatic bicomponent fibers, the blue surface layer monochromatic bicomponent fibers and the red core layer monochromatic bicomponent fibers according to the mass ratio of 2: 1, opening and mixing, and carding to form a net;
step 4, hot air consolidation: and (3) performing hot air consolidation on the fibers carded into the web in a hot air oven to obtain the colored hot air non-woven fabric.
The hot air oven adopted in the embodiment is provided with 5 sections of ovens which are arranged in sequence, the carded fibers pass through the 5 sections of ovens at a constant speed, and the total time for passing through the 4 sections of ovens is controlled to be more than or equal to 0.06 min;
setting the temperature of a first section of oven to be 131 ℃, and setting the air volume to be 45%; setting the temperature of the second section of oven to be 136 ℃ and the air volume to be 49%; setting the temperature of a third section of oven to be 141 ℃, and setting the air volume to be 57%; setting the temperature of the fourth section of oven to be 140 ℃, and setting the air volume to be 48%; setting the temperature of the fifth section of the drying oven to be 134 ℃ and the air volume to be 45%;
under the above-mentioned parameter setting of hot air consolidation, the surface layer fiber realizes regional bonding, the monochromatic bicomponent fiber of surface layer with red and blue colors is fused, the color modulation forms a new purple color of surface layer, which is the main color of the non-woven fabric, the core layer fiber is point bonding, and the adopted red monochromatic is adopted, therefore, the color of the core layer fiber is not fused with the color of the surface layer fiber, the color modulation phenomenon is not generated, and the core layer fiber and the surface layer fiber are uniformly mixed, the red color essence of the core material is still kept, and because the proportion of the color master batches added into the surface layer fiber and the core layer fiber is the same in this embodiment, and the usage of the monochromatic bicomponent fiber of surface layer is more than that of the monochromatic bicomponent fiber of core layer, therefore, the total usage of the color master batches in the surface layer material is more than the total usage of the color master batches in the core layer material, thereby forming the purple primary color of the surface layer, the red core material is the secondary color main body, the colored hot air non-woven fabric prepared in this embodiment is purple primary of surface layer, the multicolor hot-air non-woven fabric takes red core material as an auxiliary material and has 2 colors.
Example 4
By taking the preparation of the multi-color hot air non-woven fabric with purple surface layer as a main part and red-blue mixed color (multi-color patterns uniformly mixed and tiled with red and blue) of the core layer as an auxiliary part, the coloring process of the hot air non-woven fabric is introduced, and comprises the following steps:
step 1, selecting materials: the surface layer material of the bicomponent fiber adopts PE with low melting point, and the core material adopts PP with high melting point; the dosage of the surface layer material and the core layer material is 1: 1;
step 2, preparing colored cellosilk: determining the core layer color and the surface layer color of the colored bicomponent fiber and determining the color expression form of the required colored bicomponent fiber according to the color requirement of the final product and the principle that the surface layer color can be toned according to the toning principle and the core layer color is not toned; then, according to the addition amount of 1.3 percent of color master batch, red color master batch and blue color master batch are respectively added into the surface layer material, and the red color master batch and the blue color master batch are added into the core layer material; then, taking a surface layer material added with red color master batch and a core material not added with the red color master batch as raw materials, and carrying out melt spinning to enable the surface layer material to wrap the core material so as to prepare the monochromatic bicomponent fiber with red surface layer; the surface layer material added with blue color master batch and the core material not added with the color master batch are taken as raw materials, and melt spinning is carried out, so that the core material is wrapped by the surface layer material, and the core layer monochromatic bicomponent fiber with blue surface layer is prepared; taking a surface layer material without color master batch and a core material with red color master batch as raw materials, and carrying out melt spinning to wrap the core material by the surface layer material to prepare a core layer monochromatic bicomponent fiber with a red core layer; the surface layer material without the color master batch and the core material with the blue color master batch are used as raw materials, and melt spinning is carried out, so that the core material is wrapped by the surface layer material, and the core layer monochromatic bicomponent fiber with the blue core layer is prepared; standby;
because the coloring color of the non-woven fabric prepared by the embodiment is mainly purple, and the red-blue mixed color is assisted, the purple is required to be on the surface layer fiber, the red-blue mixed color is required to be on the core layer fiber, and the purple of the surface layer is formed by combining red and blue according to the color mixing principle, so that the fiber materials required to be prepared in the step are 4 types as follows: 1) the core layer is a red single-color core layer bicomponent fiber, the surface layer is the natural color (white) of the fiber, and color master batches are not added; 2) the surface layer is red, the core material is the natural color (white) of the fiber, and color master batches are not added; 3) the surface layer is a blue surface layer monochromatic bicomponent fiber, the core material is the natural color (white) of the fiber, and no color master batch is added; 4) the core material is blue and the surface layer is monochromatic bicomponent fiber, the surface layer is natural color (white) of the fiber, and color master batch is not added;
step 3, opening, mixing and carding to form a net: selecting surface layer monochromatic bicomponent fibers with red and blue colors and core material monochromatic bicomponent fibers with red and blue colors according to the color requirements of final products, then opening and mixing the surface layer monochromatic bicomponent fibers with red color, the surface layer monochromatic bicomponent fibers with blue color, the core layer monochromatic bicomponent fibers with red color and the core layer monochromatic bicomponent fibers with blue color according to the mass ratio of 1.5: 1, and carding to form a web;
step 4, hot air consolidation: and (3) performing hot air consolidation on the fibers carded into the web in a hot air oven to obtain the colored hot air non-woven fabric.
The hot air oven adopted in the embodiment is provided with 5 sections of ovens which are arranged in sequence, the fiber carded into the web passes through the 5 sections of ovens at a constant speed, and the total time for passing through the 5 sections of ovens is controlled to be more than or equal to 0.08 min;
setting the temperature of a first section of oven to be 131 ℃, and setting the air volume to be 45%; setting the temperature of a second section of oven to be 136 ℃, and setting the air volume to be 49%; setting the temperature of a third section of oven to be 141 ℃, and setting the air volume to be 57%; setting the temperature of the fourth section of oven to 138 ℃ and the air volume to 52%; setting the temperature of a fifth section of drying oven to be 134 ℃, and setting the air volume to be 45%;
under the parameter setting of the hot air consolidation, the surface layer fiber realizes the regional bonding, the surface layer monochromatic bicomponent fibers with the colors of red and blue are fused, the color adjustment forms new purple surface layer color which is the main color of the non-woven fabric, the core layer fiber is the point bonding, and the adopted red monochromatic fiber and the blue monochromatic fiber are adopted, so the color of the core layer fiber is not fused with the color of the surface layer fiber, the color adjustment phenomenon is not generated, the color adjustment phenomenon is uniformly mixed, the red and blue color essence of the core material is still kept, and because the proportion of the color master batches added into the surface layer fiber and the core layer fiber is the same in the embodiment, and the dosage of the surface layer monochromatic fiber is more than that of the core layer monochromatic bicomponent fiber, therefore, the total dosage of the color master batches in the surface layer material of the prepared non-woven fabric is more than that the total dosage of the color master batches in the core layer material, and the purple surface layer is formed as the main, the core material red and blue color mixture is an auxiliary color main body, the colored hot air non-woven fabric prepared in the embodiment is mainly purple on the surface layer, and the core material red and blue color mixture is auxiliary multi-color hot air non-woven fabric with 3 colors.
Example 5
By taking the preparation of a multi-color hot air non-woven fabric with purple surface layers as an auxiliary and red-blue color mixing of a core layer as a main example, a coloring process of the hot air non-woven fabric is introduced, and comprises the following steps:
step 1, selecting materials: the surface layer material of the bicomponent fiber adopts PE with low melting point, and the core material adopts PP with high melting point; the dosage of the surface layer material and the core layer material is 1: 1;
step 2, preparing colored cellosilk: determining the core layer color and the surface layer color of the colored bicomponent fiber and determining the color expression form of the required colored bicomponent fiber according to the color requirement of the final product and the principle that the surface layer color can be toned according to the toning principle and the core layer color is not toned; then adding red color master batch and blue color master batch into the surface layer material according to the addition of 0.3 percent of the color master batch, and adding the red color master batch and the blue color master batch into the core layer material according to the addition of 1.6 percent of the color master batch; then, the surface layer material added with the red color master batch and the core material added with the red color master batch are used as raw materials, and melt spinning is carried out, so that the core material is wrapped by the surface layer material, and the single-color bicomponent fiber with red surface layer and red core layer is prepared; the surface layer material added with blue color master batch and the core material added with blue color master batch are used as raw materials, and melt spinning is carried out, so that the core material is wrapped by the surface layer material, and the single-color bicomponent fiber with blue surface layer and blue core layer is prepared; standby;
because the coloring color of the non-woven fabric prepared by the embodiment is required to be purple as an auxiliary color, and the red-blue mixed color is mainly used, the purple is required to be on the surface layer fiber, the red-blue mixed color is required to be on the core layer fiber, and the purple of the surface layer is formed by combining red and blue according to the color mixing principle, so that the step needs to prepare 2 fiber materials as follows: 1) the core layer single-color bicomponent fiber with red surface layer and core material; 2) the surface layer and the core material are blue single-color bicomponent fibers;
step 3, opening, mixing and carding to form a net: selecting red and blue surface layer/core material monochromatic bicomponent fibers according to the color requirement of a final product, then opening and mixing the monochromatic bicomponent fibers with red surface layer colors and red core layer colors and the monochromatic bicomponent fibers with blue surface layer colors and blue core layer colors according to the mass ratio of 1: 1, and carding to form a web;
step 4, hot air consolidation: and (3) performing hot air consolidation on the fibers carded into the web in a hot air oven to obtain the colored hot air non-woven fabric.
The hot air oven adopted in the embodiment is provided with 5 sections of ovens which are arranged in sequence, the carded fibers pass through the 5 sections of ovens at a constant speed, and the total time for passing through the 5 sections of ovens is controlled to be more than or equal to 0.08 min;
setting the temperature of a first section of oven to be 130 ℃, and setting the air volume to be 43%; setting the temperature of the second section of oven to be 136 ℃ and the air volume to be 49%; setting the temperature of a third section of oven as 140 ℃, and setting the air volume as 55%; setting the temperature of the fourth section of oven to 138 ℃ and the air volume to 52%; setting the temperature of the fifth section of the drying oven to be 132 ℃ and the air volume to be 46%;
under the parameter setting of the hot air consolidation, the surface layer fibers realize region bonding, the surface layer monochromatic bicomponent fibers with the colors of red and blue are fused, the color is mixed to form a new purple surface layer color which is the auxiliary color of the non-woven fabric, the core layer fibers are point bonded, and the adopted red monochromatic fibers and the blue monochromatic fibers are adopted, so the color of the core layer fibers is not fused with the color of the surface layer fibers, the color mixing phenomenon is not generated, the red color and the blue color essence of the core material are still kept, and the red and blue color mixture is formed; and because the proportion of the color master batch added into the surface layer fiber is smaller than that of the color master batch added into the core layer fiber in the embodiment, the using amount of the surface layer material is equal to that of the core material in the melt spinning process, and when the fiber is opened and mixed, the surface layer color and the core layer color are red monochromatic bicomponent fibers, and the surface layer color and the core layer color are blue monochromatic bicomponent fibers, therefore, in the prepared harmless cloth, the total using amount of the color master batch in the surface layer material is smaller than the total using amount of the color master batch in the core layer material, so that a color main body with purple surface layer as an auxiliary color and red-blue mixed color as a main color is formed, and the colored hot-air non-woven fabric prepared in the embodiment is a multicolor hot-air non-woven fabric with 3 colors of purple, red and blue.
Comparative example 1
Taking the preparation of a single-color non-woven fabric with purple color on surface layer fibers as an example, a coloring process of a hot air non-woven fabric is introduced, and comprises the following steps: the only difference from example 1 is that: when the hot air is solidified, the temperature of the first section of drying oven is 137 ℃, and the air volume is 50%; setting the temperature of the second section of oven to 145 ℃, and setting the air volume to 57%; setting the temperature of a third section of oven to 145 ℃, wherein the air volume is 57%; the temperature of the fourth section of oven was set at 142 degrees, and the air flow was 53%.
Comparative example 2
Taking the preparation of a single-color non-woven fabric with a purple color on surface layer fibers as an example, a coloring process of a hot-air non-woven fabric is introduced, and comprises the following steps: the only difference from example 1 is that: when the hot air is solidified, the temperature of the first section of drying oven is 129 ℃, and the air volume is 43%; setting the temperature of the second section of oven to be 138 ℃ and the air volume to be 50%; setting the temperature of a third section of drying oven to be 138 ℃, and setting the air volume to be 50%; the temperature of the fourth section of oven was set at 135 ℃ and the air flow was 43%.
Comparative example 3
Taking a multi-color hot air non-woven fabric which is prepared, has colors in a core layer and is in blue-green mixed color (multi-color patterns which are uniformly mixed and tiled in blue-green) as an example, the coloring process of the hot air non-woven fabric is introduced, and comprises the following steps: the difference from example 2 is only that: when the hot air is solidified, the temperature of the first section of drying oven is 135 ℃, and the air volume is 52%; setting the temperature of the second section of oven to 145 ℃, and setting the air volume to 55%; setting the temperature of a third section of the drying oven to be 143 ℃ and the air volume to be 57%; the temperature of the fourth section of oven was set at 141 degrees, and the air flow was 53%.
Comparative example 4
Taking a multi-color hot air non-woven fabric which is prepared, has colors in a core layer and is in blue-green mixed color (multi-color patterns which are uniformly mixed and tiled in blue-green) as an example, the coloring process of the hot air non-woven fabric is introduced, and comprises the following steps: the difference from example 2 is only that: when the hot air is solidified, the temperature of the first section of drying oven is 127 ℃, and the air volume is 42%; setting the temperature of the second section of oven to be 136 ℃ and the air volume to be 48%; setting the temperature of a third section of drying oven to be 138 ℃ and the air volume to be 50%; the temperature of the fourth section of oven was set at 135 ℃ and the air flow was 43%.
Comparative example 5
By taking the preparation of the multicolor hot-air non-woven fabric with red as the main core layer and purple as the auxiliary surface layer as an example, the coloring process of the hot-air non-woven fabric is introduced, and comprises the following steps: the difference from example 3 is only that: when the hot air is solidified, the temperature of the first section of drying oven is 134 ℃, and the air volume is 47%; setting the temperature of the second section of the oven to be 140 ℃, and setting the air volume to be 52%; setting the temperature of a third section of drying oven to be 144 ℃, and setting the air volume to be 61%; setting the temperature of the fourth section of oven to 144 ℃ and the air volume to 52%; the temperature of the fifth section of oven was set at 138 ℃ and the air flow was 49%.
Comparative example 6
By taking the preparation of the multicolor hot-air non-woven fabric with red as the main core layer and purple as the auxiliary surface layer as an example, the coloring process of the hot-air non-woven fabric is introduced, and comprises the following steps: the difference from example 3 is only that: when the hot air is solidified, the temperature of the first section of drying oven is 128 ℃, and the air quantity is 41%; setting the temperature of the second section of the drying oven to 133 ℃ and the air volume to 45%; setting the temperature of a third section of drying oven to be 138 ℃ and the air volume to be 53 percent; setting the temperature of the fourth section of oven to be 136 ℃ and the air volume to be 43 percent; the temperature of the fourth section of oven was set at 131 ℃ and the air flow was 42%.
Comparative example 7
By taking the preparation of the multicolor hot-air non-woven fabric with red as the main core layer and purple as the auxiliary surface layer as an example, the coloring process of the hot-air non-woven fabric is introduced, and comprises the following steps: the difference from example 3 is only that: setting the temperature of a first section of oven to be 131 ℃, and setting the air volume to be 45%; setting the temperature of the second section of the oven to be 140 ℃ and the air volume to be 48%; setting the temperature of a third section of drying oven to be 140 ℃, and setting the air volume to be 48%; setting the temperature of the fourth section of oven to be 140 ℃, and setting the air volume to be 48%; the temperature of the fifth section of the oven is set to be 140 ℃, and the air volume is set to be 48%.
Examples of effects
Color evaluation and performance test are carried out on the non-woven fabrics of each example and each comparative example, 10 batches of non-woven fabrics are produced by adopting the methods of each example and each comparative example, the color difference and uniformity among batches are evaluated, and the results are shown in table 1;
indexes of performance test:
longitudinal strength: according to the scheme of GB/T24218.3;
transverse strength: according to the scheme of GB/T24218.3;
wear resistance rating: the method is carried out according to the scheme of WSP 020.5;
the color evaluation scale standard is as follows:
first-stage: the color is bright, and the color of the non-woven fabric is uniform;
and (2) second stage: the color is bright, and the color of the non-woven fabric is slightly uneven;
third-stage: the color is not bright enough, and the color of the non-woven fabric is slightly uneven;
and (4) fourth stage: the color is not bright enough, and the color of the non-woven fabric is not uniform;
TABLE 1
The embodiments described above are only preferred embodiments of the invention and are not exhaustive of the possible implementations of the invention. Any obvious modifications to the above would be obvious to those of ordinary skill in the art, but would not bring the invention so modified beyond the spirit and scope of the present invention.
Claims (10)
1. The coloring process of the hot-air non-woven fabric is characterized in that the hot-air non-woven fabric is prepared from bicomponent fibers with a sheath-core structure, wherein the surface layer material of the bicomponent fibers is low-melting-point resin, and the core material is high-melting-point resin; the coloring process of the hot air non-woven fabric comprises the following steps:
step 1, according to the color requirement of a final product and the principle that the surface color can be toned according to the toning principle, but the core color is not toned, determining the core color and the surface color of the colored bicomponent fiber, and determining the color expression form of the required colored bicomponent fiber; then according to the determined color types of the core layer color and the surface layer color of the colored bicomponent fiber, selecting the color of the color master batch, respectively adding the color master batch with the selected color into the surface layer material and/or the core layer material, and carrying out melt spinning to completely wrap the core material by the surface layer material so as to prepare the colored bicomponent fiber with a plurality of required color expression forms;
when a surface layer material added with color master batches and a core material not added with the color master batches are used as raw materials, the prepared colored bicomponent fiber is a monochromatic bicomponent fiber with the color on the surface layer;
when a surface layer material without color master batch and a core material with color master batch are taken as raw materials, the prepared colored bicomponent fiber is a core material monochromatic bicomponent fiber with the color of the core layer;
when a surface layer material added with color master batches and a core material added with the color master batches are used as raw materials, the prepared colored bicomponent fiber is a colored bicomponent fiber with the surface layer and the core layer both having colors, when the colors of the surface layer and the core layer of the colored bicomponent fiber with the colors are the same, the prepared colored bicomponent fiber is a monochromatic bicomponent fiber with the surface layer and the core layer having the same colors, and when the colors of the surface layer and the core layer of the colored bicomponent fiber with the colors are different, the prepared colored bicomponent fiber is a bicolor bicomponent fiber with the surface layer and the core layer having different colors;
and 2, determining the proportion of the colored bicomponent fibers with the plurality of required color expression forms prepared in the step 1 according to the color requirement of a final product, then opening and mixing, carding to form a net, and then performing hot air consolidation to obtain the colored hot air non-woven fabric.
2. The process for coloring a through-air non-woven fabric according to claim 1,
in the step 2, when opening and mixing are carried out, the surface layer monochromatic bicomponent fibers with different colors are adopted, the prepared colored hot-air non-woven fabric is the monochromatic hot-air non-woven fabric, and the color of the monochromatic hot-air non-woven fabric is the color presented after the colors of the surface layer monochromatic bicomponent fibers are matched according to the color matching principle.
3. The process for coloring a through-air non-woven fabric according to claim 1,
in the step 2, when opening and mixing are carried out, only 1 color core layer single-color bicomponent fiber is adopted, so that the prepared colored hot-air non-woven fabric is a single-color hot-air non-woven fabric, and the color of the single-color hot-air non-woven fabric is the color presented by the adopted surface layer single-color bicomponent fiber.
4. The process for coloring a through-air non-woven fabric according to claim 1,
in step 2, when opening and mixing, the core layer monochromatic bicomponent fibers with n different colors are adopted, the color of the prepared colored hot air non-woven fabric is a multi-color hot air non-woven fabric, the multi-color hot air non-woven fabric has n colors, the n colors are respectively colors independently presented by the core layer monochromatic bicomponent fibers with n different colors, and the color of the multi-color hot air non-woven fabric is a mixed color of multiple independent colors of the core layer monochromatic bicomponent fibers.
5. The process for coloring a through-air non-woven fabric according to claim 1,
in the step 2, when opening and mixing, surface layer monochromatic bicomponent fibers and 1 core layer monochromatic bicomponent fiber of various different colors are adopted, so that the prepared multicolor hot air non-woven fabric has 2 colors, namely the color presented by the surface layer monochromatic bicomponent fiber after color matching according to a color matching principle and the color presented by the core layer monochromatic bicomponent fiber; the color of the multi-color hot air non-woven fabric is the surface color which is presented after the monochromatic bicomponent fiber is matched according to the color matching principle, and the color presented by the monochromatic bicomponent fiber of the core layer is the core layer color;
in step 2, when opening and mixing, adopting a plurality of different colors of surface layer monochromatic bicomponent fibers and n core layer monochromatic bicomponent fibers, and obtaining the multi-color hot air non-woven fabric, wherein the colors of the multi-color hot air non-woven fabric have n +1 colors, which are respectively: n colors which are independently presented by the single-color bicomponent fiber at the core layer and colors which are presented by the single-color bicomponent fiber at the surface layer after color matching according to the color matching principle; the color of the multi-color hot air non-woven fabric is the surface color which is presented after the surface layer monochromatic bicomponent fiber is subjected to color matching according to the color matching principle; the color of the core layer is the mixed color of the single-color bicomponent fiber of the n core layers which independently presents the color.
6. The process for coloring a through-air non-woven fabric according to claim 1,
in step 2, when opening and mixing, adopting a plurality of monochromatic bicomponent fibers with different colors on the surface layer and n colored bicomponent fibers with colors on the surface layer and the core layer, so as to obtain the multicolor hot air non-woven fabric, wherein the colors of the multicolor hot air non-woven fabric have n +1 colors, which are respectively: the color of the core layer of the n types of colored bicomponent fibers with the colors of the surface layer and the core layer is independently shown, and the color of the surface layer of the n types of colored bicomponent fibers with the colors of the surface layer and the core layer and the color of the single-color bicomponent fibers with different colors on the surface layer are shown after color matching according to the color matching principle; the color of the multicolor hot-air non-woven fabric is the surface color of the colored bicomponent fiber with n types of surface layers and core layers having colors and the surface color of the monochromatic bicomponent fiber with a plurality of different colors on the surface layer after color matching according to the color matching principle; the color of the core layer is the mixed color of the color independently presented by the core layer fiber of the colored bicomponent fiber with the n surface layers and the core layer.
7. The process for coloring a through-air non-woven fabric according to claim 1,
the low-melting-point resin adopts PE or modified PET;
the high-melting-point resin adopts PP or PET;
in step 1, the addition amount of the color master batch is 0.1-5% of the weight of the surface layer material or the core material.
8. The process for coloring a through-air non-woven fabric according to claim 1,
the temperature of the hot air consolidation is 110-150 ℃; the air quantity of the hot air consolidation is as follows: 20 to 80 percent.
9. The process for coloring a through-air non-woven fabric according to claim 8,
the hot air consolidation is carried out in a hot air oven, and the temperature and the air quantity of the hot air consolidation are both increased and then reduced.
10. The process for coloring a through-air non-woven fabric according to claim 9,
the hot air temperature of the first section of the hot air drying oven is 130-134 ℃, and the hot air temperature of the last section of the hot air drying oven is 132-140 ℃; the middle maximum temperature of hot air consolidation is less than or equal to 142 ℃;
the hot air volume of the first section of the hot air oven is 44-50%, the hot air volume of the last section of the hot air oven is 44-50%, and the maximum air volume in the middle of hot air consolidation is less than or equal to 59%.
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