CN108729246B - Preparation method of polyvinyl alcohol non-woven fabric coating composite material - Google Patents
Preparation method of polyvinyl alcohol non-woven fabric coating composite material Download PDFInfo
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- CN108729246B CN108729246B CN201810495550.3A CN201810495550A CN108729246B CN 108729246 B CN108729246 B CN 108729246B CN 201810495550 A CN201810495550 A CN 201810495550A CN 108729246 B CN108729246 B CN 108729246B
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- polyvinyl alcohol
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- 239000011248 coating agent Substances 0.000 title claims abstract description 106
- 238000000576 coating method Methods 0.000 title claims abstract description 106
- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 85
- 239000004372 Polyvinyl alcohol Substances 0.000 title claims abstract description 84
- 229920002451 polyvinyl alcohol Polymers 0.000 title claims abstract description 84
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 238000001035 drying Methods 0.000 claims abstract description 29
- 238000001816 cooling Methods 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 claims abstract description 21
- 238000007493 shaping process Methods 0.000 claims abstract description 11
- 238000004804 winding Methods 0.000 claims abstract description 9
- 238000005516 engineering process Methods 0.000 claims abstract description 8
- 238000005096 rolling process Methods 0.000 claims abstract 2
- 239000007788 liquid Substances 0.000 claims description 23
- 239000000463 material Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 229920002472 Starch Polymers 0.000 claims description 5
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 5
- 239000004202 carbamide Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- 239000000243 solution Substances 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- -1 Alkyl glycoside Chemical class 0.000 claims description 4
- 229930182470 glycoside Natural products 0.000 claims description 4
- 229920005862 polyol Polymers 0.000 claims description 4
- 150000003077 polyols Chemical class 0.000 claims description 4
- 229920005989 resin Polymers 0.000 claims description 4
- 239000011347 resin Substances 0.000 claims description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 claims description 3
- 229920002261 Corn starch Polymers 0.000 claims description 2
- 240000003183 Manihot esculenta Species 0.000 claims description 2
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 2
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 2
- 239000008120 corn starch Substances 0.000 claims description 2
- 239000000945 filler Substances 0.000 claims description 2
- 229920000570 polyether Polymers 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 claims 1
- 238000013329 compounding Methods 0.000 abstract description 25
- 238000007789 sealing Methods 0.000 abstract description 13
- 239000000835 fiber Substances 0.000 abstract description 10
- 239000011247 coating layer Substances 0.000 description 8
- 239000012496 blank sample Substances 0.000 description 4
- 230000003631 expected effect Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229920002978 Vinylon Polymers 0.000 description 2
- 230000001112 coagulating effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 description 1
- 150000001241 acetals Chemical class 0.000 description 1
- 230000003796 beauty Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000010985 leather Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000002166 wet spinning Methods 0.000 description 1
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/04—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
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- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
- D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
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- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0061—Organic fillers or organic fibrous fillers, e.g. ground leather waste, wood bark, cork powder, vegetable flour; Other organic compounding ingredients; Post-treatment with organic compounds
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- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0056—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the compounding ingredients of the macro-molecular coating
- D06N3/0063—Inorganic compounding ingredients, e.g. metals, carbon fibres, Na2CO3, metal layers; Post-treatment with inorganic compounds
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- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
- D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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Abstract
The invention discloses a preparation method of a polyvinyl alcohol non-woven fabric coating composite material, which comprises the following steps: unreeling the polyvinyl alcohol non-woven fabric, allowing the polyvinyl alcohol non-woven fabric to enter a coating roller through a traction roller, quantitatively coating the polyvinyl alcohol non-woven fabric through a coating die head, and then drying the polyvinyl alcohol non-woven fabric in a drying channel; and (3) shaping the dried composite non-woven fabric by a shaping roller, cooling by a cooling roller, and rolling by a winding roller to obtain the coated and compounded polyvinyl alcohol non-woven fabric. After the coating and compounding of the technology disclosed by the invention, the original polyvinyl alcohol non-woven fabric without the heat sealing performance has the heat sealing performance of secondary processing, and the processes of edge sealing, continuous bag making and the like of an automatic machine are facilitated, so that the product processing efficiency is greatly improved and the cost is reduced; meanwhile, the fiber nodes in the polyvinyl alcohol non-woven fabric are firmer, so that the mechanical property of the polyvinyl alcohol non-woven fabric is further improved; and the breaking elongation of the polyvinyl alcohol is improved, so that the polyvinyl alcohol non-woven fabric is softer and more comfortable.
Description
Technical Field
The invention relates to the field of non-woven fabric composite materials, in particular to a preparation method of a polyvinyl alcohol non-woven fabric coating composite material.
Background
Polyvinyl alcohol (PVA) has been rapidly developed and applied in many fields in recent years as an environment-friendly material. As a great country with vinylon capacity, China has rich raw material sources and application markets, in the former stage of vinylon production, polyvinyl alcohol (PVA) fibers formed by wet spinning and coagulating bath are directly used for producing polyvinyl alcohol non-woven fabrics without continuous acetal treatment, and the method is also a field which is rapidly developed and applied in recent years. Due to the water-soluble property and the environment-friendly property of polyvinyl alcohol, nonwoven fabrics made of plastic synthetic resins as raw materials have been replaced in many fields. Such as shoemaking, leather making, mattresses, quilts, decoration, chemical engineering, printing, automotive, building materials, furniture and other industries, and clothing linings, medical and sanitary disposable operating gowns, masks, hats, bed sheets, hotel disposable tablecloths, beauty, sauna and even modern fashionable gift bags, top-quality bags, shopping bags, advertisement bags and the like. Especially, the disposable application field can completely replace the traditional plastic synthetic resin non-woven fabric, so that the product has more environmental protection.
It can be known from the preparation technology and process of polyvinyl alcohol fiber that the polyvinyl alcohol solution is spun by wet method, the obtained nascent fiber is solidified in alkaline coagulating bath, and is formed into fiber after neutralization, water washing, multi-stage high-power drawing and heat treatment, and the polyvinyl alcohol fiber with excellent mechanical property is obtained, not only the strength is high, the modulus is high, but also the dispersibility of the fiber is very good. The fiber can be used for producing polyvinyl alcohol non-woven fabrics with various specifications.
The melting point of the polyvinyl alcohol is as high as 220-230 ℃, while under the heated condition, the polyvinyl alcohol begins to be unstable and decomposed at 180 ℃, and the decomposition is accelerated along with the continuous rise of the temperature and is accompanied with the generation of crosslinking; therefore, pure polyvinyl alcohol is not thermoplastic, that is, the non-woven fabric made of polyvinyl alcohol fiber does not have thermoplastic, which is one of the biggest defects of the polyvinyl alcohol non-woven fabric, that is, the non-woven fabric cannot have excellent heat sealing performance like the non-woven fabrics made of other common plastic synthetic resins, so that the application fields of the non-woven fabric are limited, such as the secondary processing of the non-woven fabric: edge sealing, bag making, etc., can only be done with conventional stitching and not by automated heat sealing processing machinery. This results in inefficient machining and a dramatic increase in cost.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a preparation method of a polyvinyl alcohol non-woven fabric coating composite material. Thereby greatly improving the processing efficiency and reducing the cost.
The purpose of the invention is realized by at least one of the following technical solutions.
A preparation method of polyvinyl alcohol non-woven fabric coating composite material is characterized in that a unwinding roller (1-1) releases polyvinyl alcohol non-woven fabric, the polyvinyl alcohol non-woven fabric enters a coating roller (1-4) through a traction roller (1-2), is coated quantitatively through a coating die head (1-3), and then enters a drying channel (1-5) for drying; the dried composite non-woven fabric is shaped by shaping rollers (1-6), cooled by cooling rollers (1-7) and wound by composite non-woven fabric winding rollers (1-8).
Further, the coating liquid used for coating comprises the following components in parts by weight:
further, the polyvinyl alcohol PVA is a resin with the polymerization degree of less than 2000 and comprises one of PVA-0588, PVA-1388, PVA-1588, PVA-1788, PVA-0599, PVA-1399, PVA-1599 or PVA-1799.
Further, the starch in the coating liquid is corn starch or tapioca starch.
Further, the polyol co-polyether in the coating liquid comprises one of PEB03, PBF42 and OPSA-B manufactured by Guangzhou Wancapacity New Material science and technology Limited; is a water-soluble resin with a molecular weight of less than 1000.
Further, the alkyl glycoside in the coating liquid is a plasticizing compatibilizer, and comprises one of APG0810, APG0814, APG1214, APG0816, APG1216 and the like in single-carbon six-, carbon eight-and carbon ten-products.
Further, the urea in the coating liquid is industrial grade urea; the talcum powder is volume filler with fineness larger than or equal to 2000 meshes.
Furthermore, the materials in the coating liquid are metered and then heated to 95 ℃ in water to be fully dissolved into a uniform aqueous solution.
Further, the drying channel (1-5) is controlled by 4 zones, and the temperature control is as follows: 120/140/160/180 deg.C; the setting temperature of the setting rollers (1-6) is 120-160 ℃; the cooling temperature of the cooling roller (1-7) is 20-25 ℃.
Further, the coating amount required for the coating is, after drying, from 10 to 25g/m2(ii) a The specification of the polyvinyl alcohol non-woven fabric used for coating is (gsm): 15-35 g/m2。
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) after the coating and compounding, the original polyvinyl alcohol non-woven fabric without the heat sealing performance has the heat sealing performance of secondary processing, and the processes of edge sealing, continuous bag making and the like of automatic machinery are favorably realized, so that the product processing efficiency is greatly improved and the cost is reduced;
(2) after the coating and compounding of the invention, the fiber nodes in the original polyvinyl alcohol non-woven fabric are firmer, thereby further improving the mechanical property of the original polyvinyl alcohol non-woven fabric;
(3) after the coating and compounding of the invention, the elongation at break of the polyvinyl alcohol non-woven fabric is improved, so that the polyvinyl alcohol non-woven fabric is softer and more comfortable.
Drawings
FIG. 1 is a schematic diagram of a coating and compositing process apparatus used in an embodiment.
Detailed Description
The technical solutions of the present invention are further described in detail below with reference to specific examples and drawings, but the scope and implementation of the present invention are not limited thereto.
The schematic diagram of the coating and compounding process apparatus used in this example is shown in fig. 1, and includes: a non-woven fabric unwinding roller 1-1; 1-2 of a traction roller; coating die heads 1-3; 1-4 of a coating roller; 1-5 of a drying channel; 1-6 of a shaping roller; 1-7 of a cooling roller; and 1-8 composite non-woven fabric winding rollers.
The device shown in fig. 1 is adopted to coat the composite polyvinyl alcohol non-woven fabric, and the method specifically comprises the following steps: polyvinyl alcohol non-woven fabric is released by a releasing roll 1-1, enters a coating roll 1-4 through a traction roll 1-2, is coated quantitatively by a coating die head 1-3, and then enters a drying channel 1-5 for drying; the dried composite non-woven fabric is shaped by shaping rollers 1-6, cooled by cooling rollers 1-7, and wound by composite non-woven fabric winding rollers 1-8.
Example 1
The coating compounding of the polyvinyl alcohol non-woven fabric specifically comprises the following steps:
(1) the coating liquid used by the coating layer comprises the following components in parts by weight:
after being measured, all materials in the coating liquid are heated in water to 95 ℃ and fully dissolved into uniform aqueous solution, so as to obtain the coating liquid;
(2) the specification of the polyvinyl alcohol non-woven fabric for coating and compounding is as follows: 15g/m2；
(3) Coating and compounding process: polyvinyl alcohol non-woven fabric is released by a releasing roll 1-1, enters a coating roll 1-4 through a traction roll 1-2, is coated quantitatively by a coating die head 1-4, and then enters a drying channel 1-5 for drying; the dried composite non-woven fabric is shaped by shaping rollers 1-6, cooled by cooling rollers 1-7, and wound by composite non-woven fabric winding rollers 1-8.
(4) Coating composite process conditions: drying channel 1-5 are 4 district accuse temperature, and accuse temperature is in proper order: 120/140/160/180 deg.C; setting temperature of the setting rollers 1-6 is 120 ℃; the cooling temperature of the cooling rolls 1 to 7 is 25 ℃.
(5) Coating amount of coating layer in coating composite: calculated after drying, is 10g/m2。
The results of comparing the properties of the polyvinyl alcohol nonwoven fabric coated and compounded with those of the polyvinyl alcohol nonwoven fabric not coated and compounded (blank) are shown in table 1.
TABLE 1 comparison of the properties of the polyvinyl alcohol nonwoven after coating and compounding with those without coating (blank)
As can be seen from Table 1, compared with the blank sample, the heat sealing performance of the polyvinyl alcohol non-woven fabric after coating and compounding treatment is greatly improved by 648% (coating the compound layer); the longitudinal tensile strength and the transverse tensile strength are respectively improved by 24.5 percent and 28.6 percent; the elongation at break is improved by 333.6 percent. The expected effect of the technology is proved.
Example 2
The coating compounding of the polyvinyl alcohol non-woven fabric specifically comprises the following steps:
(1) the coating liquid used by the coating layer comprises the following components in parts by weight:
after being measured, all materials in the coating liquid are heated in water to 95 ℃ and fully dissolved into uniform aqueous solution, so as to obtain the coating liquid;
(2) the specification of the polyvinyl alcohol non-woven fabric for coating and compounding is as follows: 35g/m2；
(3) Coating and compounding process: polyvinyl alcohol non-woven fabric is released by a releasing roll 1-1, enters a coating roll 1-3 through a traction roll 1-2, is coated quantitatively by a coating die head 1-4, and then enters a drying channel 1-5 for drying; the dried composite non-woven fabric is shaped by shaping rollers 1-6, cooled by cooling rollers 1-7, and wound by composite non-woven fabric winding rollers 1-8.
(4) Coating composite process conditions: drying channel 1-5 are 4 district accuse temperature, and accuse temperature is in proper order: 120/140/160/180 deg.C; setting temperature of the setting rollers 1-6 is 160 ℃; the cooling temperature of the cooling rolls 1-7 is 20 ℃.
(5) Coating amount of coating layer in coating composite: calculated after drying, is 25g/m2。
The results of comparing the properties of the polyvinyl alcohol nonwoven fabric coated and compounded with those of the polyvinyl alcohol nonwoven fabric not coated and compounded (blank) are shown in table 2.
TABLE 2 comparison of the properties of the polyvinyl alcohol nonwoven after coating and compounding with those without coating (blank)
As can be seen from Table 2, compared with the blank sample, the heat sealing performance of the polyvinyl alcohol nonwoven fabric after the coating and compounding treatment is greatly improved by 651% (coating the compound layer); the longitudinal tensile strength and the transverse tensile strength are respectively improved by 25.7 percent and 28.9 percent; the elongation at break is increased 329.4%. The expected effect of the technology is proved.
Example 3
The coating compounding of the polyvinyl alcohol non-woven fabric specifically comprises the following steps:
(1) the coating liquid used by the coating layer comprises the following components in parts by weight:
after being measured, all materials in the coating liquid are heated in water to 95 ℃ and fully dissolved into uniform aqueous solution, so as to obtain the coating liquid;
(2) the specification of the polyvinyl alcohol non-woven fabric for coating and compounding is as follows: 20g/m2；
(3) Coating and compounding process: polyvinyl alcohol non-woven fabric is released by a releasing roll 1-1, enters a coating roll 1-4 through a traction roll 1-2, is coated quantitatively by a coating die head 1-3, and then enters a drying channel 1-5 for drying; the dried composite non-woven fabric is shaped by shaping rollers 1-6, cooled by cooling rollers 1-7, and wound by composite non-woven fabric winding rollers 1-8.
(4) Coating composite process conditions: drying channel 1-5 are 4 district accuse temperature, and accuse temperature is in proper order: 120/140/160/180 deg.C; setting temperature of the setting rollers 1-6 is 150 ℃; the cooling temperature of the cooling rolls 1 to 7 is 23 ℃.
(5) Coating amount of coating layer in coating composite: calculated after drying, is 20g/m2。
The results of comparing the properties of the polyvinyl alcohol nonwoven fabric coated and compounded with those of the polyvinyl alcohol nonwoven fabric not coated and compounded (blank) are shown in Table 3.
TABLE 3 comparison of the properties of the polyvinyl alcohol nonwoven after coating and compounding with those without coating (blank)
As can be seen from Table 3, compared with the blank sample, the heat sealing performance of the polyvinyl alcohol nonwoven fabric after the coating and compounding treatment is greatly improved by 634% (coating the composite layer); the longitudinal tensile strength and the transverse tensile strength are respectively improved by 34.9 percent and 37.9 percent; the elongation at break is improved by 325 percent. The expected effect of the technology is proved.
Example 4
The coating compounding of the polyvinyl alcohol non-woven fabric specifically comprises the following steps:
(1) the coating liquid used by the coating layer comprises the following components in parts by weight:
after being measured, all materials in the coating liquid are heated in water to 95 ℃ and fully dissolved into uniform aqueous solution, so as to obtain the coating liquid;
(2) the specification of the polyvinyl alcohol non-woven fabric for coating and compounding is as follows: 18g/m2；
(3) Coating and compounding process: polyvinyl alcohol non-woven fabric is released by a releasing roll 1-1, enters a coating roll 1-4 through a traction roll 1-2, is coated quantitatively by a coating die head 1-3, and then enters a drying channel 1-5 for drying; the dried composite non-woven fabric is shaped by shaping rollers 1-6, cooled by cooling rollers 1-7, and wound by composite non-woven fabric winding rollers 1-8.
(4) Coating composite process conditions: drying channel 1-5 are 4 district accuse temperature, and accuse temperature is in proper order: 120/140/160/180 deg.C; setting temperature of the setting rollers 1-6 is 140 ℃; the cooling temperature of the cooling rolls 1 to 7 is 25 ℃.
(5) Coating amount of coating layer in coating composite: calculated after drying, 15g/m2。
The results of comparing the properties of the polyvinyl alcohol nonwoven fabric coated and compounded with those of the polyvinyl alcohol nonwoven fabric not coated and compounded (blank) are shown in Table 4.
TABLE 4 comparison of the properties of the polyvinyl alcohol nonwoven after coating and compounding with those without coating (blank)
As can be seen from Table 4, compared with the blank sample, the heat sealing performance of the polyvinyl alcohol non-woven fabric after coating and compounding treatment is greatly improved by 555% (coating the compound layer); the longitudinal tensile strength and the transverse tensile strength are respectively improved by 30.8 percent and 32.5 percent; the elongation at break is improved by 335%. The expected effect of the technology is proved.
The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A preparation method of a polyvinyl alcohol non-woven fabric coating composite material is characterized in that a unwinding roller (1-1) releases a polyvinyl alcohol non-woven fabric, the polyvinyl alcohol non-woven fabric enters a coating roller (1-4) through a traction roller (1-2) and is coated quantitatively through a coating die head (1-3), and then the polyvinyl alcohol non-woven fabric enters a drying channel (1-5) for drying; shaping the dried composite non-woven fabric through shaping rollers (1-6), cooling through cooling rollers (1-7), and rolling through composite non-woven fabric winding rollers (1-8); the coating liquid used for coating comprises the following components in parts by weight:
water 100
Polyvinyl alcohol PVA 8-18
Starch 5-10
Polyol copolyether 8-20
Alkyl glycoside 3-10
1-3 of urea
3-10 parts of talcum powder;
the polyvinyl alcohol PVA is resin with the polymerization degree of less than 2000; the polyol copolyether is a water-soluble resin with a molecular weight of less than 1000; the alkyl glycoside in the coating fluid is a plasticizing compatibilizer; the alkyl glycoside in the coating liquid comprises one of APG0810, APG0814, APG1214, APG0816 and APG1216 in single-carbon six-, eight-and ten-carbon products; the polyol co-polyether in the coating liquid comprises one of PEB03, PBF42 and OPSA-B which are produced by Guangzhou Wancapacity New Material science and technology Limited.
2. The method for preparing a polyvinyl alcohol non-woven fabric coating composite material according to claim 1, wherein the starch in the coating liquid is corn starch or tapioca starch.
3. The method for preparing the polyvinyl alcohol non-woven fabric coating composite material according to claim 1, wherein the urea in the coating liquid is industrial grade urea; the talcum powder is volume filler with fineness larger than or equal to 2000 meshes.
4. The method of claim 1, wherein the coating solution is heated to 95 ℃ in water after being measured to dissolve the materials into a uniform aqueous solution.
5. The method of claim 1, wherein the PVA is selected from PVA-0588, PVA-1388, PVA-1588, PVA-1788, PVA-0599, PVA-1399, PVA-1599 and PVA-1799.
6. The preparation method of the polyvinyl alcohol non-woven fabric coated composite material according to claim 1, wherein the drying channel (1-5) is controlled by 4 zones, and the temperature control is sequentially as follows: 120/140/160/180 deg.C; the setting temperature of the setting rollers (1-6) is 120-160 ℃; the cooling temperature of the cooling roller (1-7) is 20-25 ℃.
7. The method of claim 1, wherein the coating amount is 10-25 g/m after drying2(ii) a The specification of the polyvinyl alcohol non-woven fabric used for coating is (gsm): 15-35 g/m2。
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