CN118773918A - Softener for super-soft degradable spun-bonded non-woven fabric, and preparation method and application thereof - Google Patents
Softener for super-soft degradable spun-bonded non-woven fabric, and preparation method and application thereof Download PDFInfo
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- CN118773918A CN118773918A CN202411254314.4A CN202411254314A CN118773918A CN 118773918 A CN118773918 A CN 118773918A CN 202411254314 A CN202411254314 A CN 202411254314A CN 118773918 A CN118773918 A CN 118773918A
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- 239000004745 nonwoven fabric Substances 0.000 title claims abstract description 139
- 238000002360 preparation method Methods 0.000 title claims abstract description 28
- 239000000463 material Substances 0.000 claims abstract description 88
- -1 poly (succinic acid-adipic acid-butylene succinate Chemical compound 0.000 claims abstract description 52
- 238000002156 mixing Methods 0.000 claims abstract description 38
- VBICKXHEKHSIBG-UHFFFAOYSA-N 1-monostearoylglycerol Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)CO VBICKXHEKHSIBG-UHFFFAOYSA-N 0.000 claims abstract description 28
- 239000004902 Softening Agent Substances 0.000 claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 16
- ZMKVBUOZONDYBW-UHFFFAOYSA-N 1,6-dioxecane-2,5-dione Chemical compound O=C1CCC(=O)OCCCCO1 ZMKVBUOZONDYBW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000004953 Aliphatic polyamide Substances 0.000 claims abstract description 14
- 239000002202 Polyethylene glycol Substances 0.000 claims abstract description 14
- 229920003231 aliphatic polyamide Polymers 0.000 claims abstract description 14
- 229920003063 hydroxymethyl cellulose Polymers 0.000 claims abstract description 14
- 229940031574 hydroxymethyl cellulose Drugs 0.000 claims abstract description 14
- 239000012170 montan wax Substances 0.000 claims abstract description 14
- 229920001223 polyethylene glycol Polymers 0.000 claims abstract description 14
- WBHHMMIMDMUBKC-XLNAKTSKSA-N ricinelaidic acid Chemical compound CCCCCC[C@@H](O)C\C=C\CCCCCCCC(O)=O WBHHMMIMDMUBKC-XLNAKTSKSA-N 0.000 claims abstract description 14
- 229960003656 ricinoleic acid Drugs 0.000 claims abstract description 14
- FEUQNCSVHBHROZ-UHFFFAOYSA-N ricinoleic acid Natural products CCCCCCC(O[Si](C)(C)C)CC=CCCCCCCCC(=O)OC FEUQNCSVHBHROZ-UHFFFAOYSA-N 0.000 claims abstract description 14
- 229940075507 glyceryl monostearate Drugs 0.000 claims abstract description 9
- 239000001788 mono and diglycerides of fatty acids Substances 0.000 claims abstract description 9
- 238000009264 composting Methods 0.000 claims abstract description 8
- 238000000354 decomposition reaction Methods 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 3
- 230000008018 melting Effects 0.000 claims abstract description 3
- 239000000155 melt Substances 0.000 claims description 48
- 239000000203 mixture Substances 0.000 claims description 38
- 229920002961 polybutylene succinate Polymers 0.000 claims description 26
- 239000004631 polybutylene succinate Substances 0.000 claims description 26
- 238000001125 extrusion Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 18
- 239000012760 heat stabilizer Substances 0.000 claims description 17
- 239000002667 nucleating agent Substances 0.000 claims description 17
- 239000012744 reinforcing agent Substances 0.000 claims description 15
- 238000004519 manufacturing process Methods 0.000 claims description 14
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 claims description 10
- 239000000654 additive Substances 0.000 claims description 8
- 230000000996 additive effect Effects 0.000 claims description 8
- 239000012752 auxiliary agent Substances 0.000 claims description 6
- GMPCVWPKHFTZLH-UHFFFAOYSA-N butanedioic acid;1,6-dioxacyclododecane-7,12-dione Chemical compound OC(=O)CCC(O)=O.O=C1CCCCC(=O)OCCCCO1 GMPCVWPKHFTZLH-UHFFFAOYSA-N 0.000 claims description 6
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 claims description 5
- YQEMORVAKMFKLG-UHFFFAOYSA-N glycerine monostearate Natural products CCCCCCCCCCCCCCCCCC(=O)OC(CO)CO YQEMORVAKMFKLG-UHFFFAOYSA-N 0.000 claims description 5
- SVUQHVRAGMNPLW-UHFFFAOYSA-N glycerol monostearate Natural products CCCCCCCCCCCCCCCCC(=O)OCC(O)CO SVUQHVRAGMNPLW-UHFFFAOYSA-N 0.000 claims description 5
- JKBYAWVSVVSRIX-UHFFFAOYSA-N octadecyl 2-(1-octadecoxy-1-oxopropan-2-yl)sulfanylpropanoate Chemical group CCCCCCCCCCCCCCCCCCOC(=O)C(C)SC(C)C(=O)OCCCCCCCCCCCCCCCCCC JKBYAWVSVVSRIX-UHFFFAOYSA-N 0.000 claims description 5
- JSZNQQVYIRVXQV-UHFFFAOYSA-N butanedioic acid;butane-1,4-diol;hexanedioic acid Chemical compound OCCCCO.OC(=O)CCC(O)=O.OC(=O)CCCCC(O)=O JSZNQQVYIRVXQV-UHFFFAOYSA-N 0.000 claims description 4
- 229920009537 polybutylene succinate adipate Polymers 0.000 claims description 4
- SSTALXWJLKACQG-UHFFFAOYSA-L calcium;dioxido-oxo-phenyl-$l^{5}-phosphane Chemical compound [Ca+2].[O-]P([O-])(=O)C1=CC=CC=C1 SSTALXWJLKACQG-UHFFFAOYSA-L 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
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- PFQAIMSYOXGWGG-UHFFFAOYSA-N N'-benzoylbenzohydrazide decanedioic acid Chemical compound C(C1=CC=CC=C1)(=O)NNC(C1=CC=CC=C1)=O.C(=O)(O)CCCCCCCCC(=O)O PFQAIMSYOXGWGG-UHFFFAOYSA-N 0.000 claims description 2
- 229960000892 attapulgite Drugs 0.000 claims description 2
- 239000004927 clay Substances 0.000 claims description 2
- 150000002148 esters Chemical class 0.000 claims description 2
- 229910052625 palygorskite Inorganic materials 0.000 claims description 2
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- 230000000052 comparative effect Effects 0.000 description 19
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- 239000004626 polylactic acid Substances 0.000 description 13
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- 229920000747 poly(lactic acid) Polymers 0.000 description 12
- 238000009987 spinning Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000005491 wire drawing Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 238000007664 blowing Methods 0.000 description 4
- 238000001000 micrograph Methods 0.000 description 4
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- FQINETJTVSEXPE-UHFFFAOYSA-N butanedioic acid;butane-1,4-diol Chemical compound OCCCCO.OC(=O)CCC(O)=O FQINETJTVSEXPE-UHFFFAOYSA-N 0.000 description 3
- 239000002131 composite material Substances 0.000 description 3
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- 239000001913 cellulose Substances 0.000 description 2
- OEBRCSBPOCUVMW-UHFFFAOYSA-N dibenzoyl decanedioate Chemical compound C=1C=CC=CC=1C(=O)OC(=O)CCCCCCCCC(=O)OC(=O)C1=CC=CC=C1 OEBRCSBPOCUVMW-UHFFFAOYSA-N 0.000 description 2
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- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
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- 230000000844 anti-bacterial effect Effects 0.000 description 1
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- 238000005422 blasting Methods 0.000 description 1
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- 239000000945 filler Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000004750 melt-blown nonwoven Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- WTJKGGKOPKCXLL-RRHRGVEJSA-N phosphatidylcholine Chemical compound CCCCCCCCCCCCCCCC(=O)OC[C@H](COP([O-])(=O)OCC[N+](C)(C)C)OC(=O)CCCCCCCC=CCCCCCCCC WTJKGGKOPKCXLL-RRHRGVEJSA-N 0.000 description 1
- 150000008105 phosphatidylcholines Chemical class 0.000 description 1
- 239000005014 poly(hydroxyalkanoate) Substances 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
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Landscapes
- Biological Depolymerization Polymers (AREA)
Abstract
The invention relates to the technical field of degradable high polymer materials, in particular to a softener for super-soft degradable spun-bonded non-woven fabrics, a preparation method and application thereof. The softening agent is prepared by melting and mixing one of poly (butylene succinate) or poly (succinic acid-adipic acid-butylene succinate) with hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate through a double-screw extruder. And preparing a modified material by the softener, and preparing a super-soft degradable spun-bonded non-woven fabric by using the modified material, wherein the softness of the non-woven fabric is 16.5-19.7mN, the fiber diameter is 18-19 mu m, and the biological decomposition rate is more than 95.3% in 180 days under the composting condition.
Description
Technical Field
The invention relates to the technical field of degradable high polymer materials, in particular to a softener for super-soft degradable spun-bonded non-woven fabrics, a preparation method and application thereof.
Background
Nonwoven fabrics are the youngest and most promising field in the textile industry, and in the past half century, they have received great attention from the industry sector and consumer preference due to their short process flow, high yield, low cost, rapid variety change, wide raw material sources, and many functionally superior properties. According to the estimation, the non-woven fabric is one of the upstream raw materials with the largest proportion in the cost of the infant diaper, and accounts for 26.9% of the production cost. With the popularization of scientific child-bearing concepts and the enhancement of consumption capability, more parents use diapers, the habit of the old parents for washing the diapers by hands is changed, the market permeability of the diapers is expected to be improved from 60% to more than 80%, and the overall situation of stable growth is presented.
The non-woven fabrics material that the panty-shape diapers used is polypropylene (PP), and PP non-woven fabrics touch hard to a touch, and the problem that the surface texture is soft, the edge texture is hard to a touch exists in the panty-shape diapers of preparation, and then leads to the inboard tender skin friction scratch of infant's thigh, and PP non-woven fabrics can not degrade after using in addition, pile up more and more in the environment, have brought serious harm to ecological environment. The fully biodegradable non-woven fabric can be completely degraded into carbon dioxide and water after being used and abandoned, and cannot pollute the environment.
The degradable material can be degraded into carbon dioxide and water after being used, so that the degradable material does not cause any pollution to the environment, and has attracted wide attention in recent years. However, in thermoplastic biodegradable plastics, which are a large number of biodegradable materials such as polybutylene adipate and polybutylene terephthalate copolymer (PBAT), polylactic acid (PLA), polycaprolactone (PCL), polyunsaturated Phosphatidylcholine (PPC), polyhydroxyalkanoate (PHA), and the like, most of the materials have poor spinnability, and the materials themselves cannot meet the spinning requirements. For example, in journal "research progress of preparing PBS degradable composite material by cellulose-based filler" in Chinese paper, the author is Wei Jiale et al, and the paper discloses that cellulose has low cost and excellent mechanical property, and polybutylene succinate (PBS) has good biocompatibility and degradability, and both are ideal high polymer materials for preparing the degradable composite material. Preparation and performance of fully biodegradable high impact PLA/PBAT composite materials in the university of petrochemical university of Liaoning, authors' Jiang Wenxin et al, disclose in the article that PLA has poor toughness, especially poor impact resistance, and limit the application range thereof.
CN108823977a discloses a preparation method of antibacterial PLA nonwoven fabric, comprising the following steps: pre-treating the PLA non-woven fabric to obtain a first standby PLA non-woven fabric; performing medium treatment on the first standby PLA non-woven fabric to obtain a second standby PLA non-woven fabric; preparing a cationic nano silver solution; placing the second standby PLA non-woven fabric into the cationic nano silver solution for treatment to obtain a third standby PLA non-woven fabric; and obtaining the PLA nano silver non-woven fabric according to the third standby PLA non-woven fabric. However, the technical proposal adopts PLA material with better spinning performance, and the problems of brittleness, poor toughness, low elongation, poor cloth surface hand feeling and the like of the non-woven fabric exist at present.
CN113106625A discloses a method for preparing degradable PBAT melt-blown nonwoven fabric by a one-step method, comprising the following steps: step one: preparing a PBAT melt; step two: preparing a modified PBAT melt; step three: and (3) conveying the modified PBAT blending melt obtained in the step (II) to a non-woven fabric preparation device, extruding the melt from a spinneret orifice of a die head in the non-woven fabric preparation device, condensing the melt on a drum-type receiver with the distance of 4cm from a spray head, self-bonding the self-bonding non-woven fabric, cooling, taking the non-woven fabric off the drum by a blade, drying and shaping the non-woven fabric in a drying oven, wherein the shaping temperature is 65 ℃, and the shaping time is 6 hours, so that the PBAT melt-blown biodegradable non-woven fabric is obtained. According to the preparation method, the PBAT polymer melt does not need to undergo the processes of water cooling granulating, drying cooling, heating melting mixing and the like, so that the degradation of the molecular weight, the viscosity and the deterioration of the melt quality of the PBAT resin caused by drying factors and high-temperature shearing are avoided, the spinnability of the material is ensured, and the quality of the PBAT non-woven fabric is ensured. The technical scheme utilizes the melt-blowing method to prepare the PBAT non-woven fabric, but the spinning method can generate the phenomenon of sticking filaments in the filament drawing process due to the slow cooling speed of the PBAT.
Based on the above prior art, there are technical problems in the prior art that the melt strength of the degradable material is low, the spinnability is poor, the yarn breakage is easy in the spinning process, and the non-woven fabric is hard and rough in touch.
Disclosure of Invention
In order to solve the technical problems, the invention provides a softening agent for super-soft degradable spun-bonded non-woven fabrics, which is prepared by melt mixing one of polybutylene succinate (PBS) or polybutylene succinate-adipic acid-butylene succinate (PBSA), hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate by a double-screw extruder, wherein the melt index of the softening agent is 100-600g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
Further, the softener comprises the following components in parts by weight:
polybutylene succinate or polybutylene succinate-adipic acid-butylene succinate: 60-80 parts by weight;
Hydroxymethyl cellulose: 3-5 parts by weight;
polyethylene glycol: 5-8 parts by weight;
Aliphatic polyamide: 3-5 parts by weight;
Montan wax: 5-10 parts by weight;
ricinoleic acid: 2-5 parts by weight;
Glycerol monostearate: 3-5 parts by weight.
Further, the melt index of the poly (butylene succinate) or the poly (butylene succinate-co-adipate) is 26-39g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
The invention also provides a preparation method of the softening agent for the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps:
Step 1, mixing hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate according to a proportion to obtain a pre-prepared mixture of a softening auxiliary agent;
And 2, adding the polybutylene succinate or the polybutylene succinate-adipic acid-butylene succinate and the soft additive prefabricated mixture prepared in the step 1 into a double-screw extruder for extrusion to obtain the softener.
Further, the equipment used in the step 1 is a high-speed mixer, the rotation speed is 300-800rpm, and the mixing time is 3-5min.
Further, in the step 2, the poly (butylene succinate) or poly (butylene succinate-co-adipate) enters the double-screw extruder through a main feeding system connected with a first zone of the double-screw extruder, and the soft additive prefabricated mixture enters the double-screw extruder through a side feeding system connected with a fourth zone of the double-screw extruder.
Further, the twin-screw extruder for preparing the softener comprises thirteen temperature areas, wherein the temperatures of the areas are respectively set to be 110-120 ℃ in the first area, 130-140 ℃ in the second area, 150-160 ℃ in the third area, 160-170 ℃ in the fourth area, 160-170 ℃ in the fifth area, 170-180 ℃ in the sixth area, 170-180 ℃ in the seventh area, 170-180 ℃ in the eighth area, 170-180 ℃ in the ninth area, 170-180 ℃ in the tenth area, 170-180 ℃ in the eleventh area, 170-180 ℃ in the twelve area, 170-180 ℃ in the thirteenth area, the screw speed is 200-300r/min, the feeding speed is 30-50Hz, and the length-diameter ratio is 52:1.
Further, the screw combination in the twin screw extruder includes at least one set of SME flighted elements and at least one set of ZME flighted elements.
Further, the screw combination in the double screw extruder comprises three groups of SME screw elements and three groups of ZME screw elements;
wherein the first set of SME screw elements corresponds to the two zones of the twin screw extruder, the second set of SME screw elements corresponds to the six zones of the twin screw extruder, and the third set of SME screw elements corresponds to the eleven zones of the twin screw extruder; the first set of ZME screw elements corresponds to three zones of the twin screw extruder, the second set of ZME screw elements corresponds to six zones of the twin screw extruder, and the third set of ZME screw elements corresponds to ten zones of the twin screw extruder.
Or the first set of SME flighted elements corresponds to a zone of the twin screw extruder, the second set of SME flighted elements corresponds to an eight zone of the twin screw extruder, and the third set of SME flighted elements corresponds to a twelve zone of the twin screw extruder; the first set of ZME screw elements corresponds to two zones of the twin screw extruder, the second set of ZME screw elements corresponds to seven zones of the twin screw extruder, and the third set of ZME screw elements corresponds to ten zones of the twin screw extruder.
And further, the step 2 comprises granulating and drying after extrusion, wherein equipment used for granulating is a granulator, and drying is drying to remove water.
The invention also provides a modified material for the super-soft degradable spun-bonded non-woven fabric, which is prepared by melt mixing one or two of poly (succinic acid-adipic acid-butylene glycol) (PBSA) or poly (butylene succinate) (PBS), and the softening agent, the nucleating agent, the melt reinforcing agent and the heat stabilizer for the super-soft degradable spun-bonded non-woven fabric, wherein the melt index of the modified material is 21-42g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
Further, the modified material comprises the following components in parts by weight:
Poly (succinic acid) -adipic acid-butylene ester: 5-90 parts by weight;
polybutylene succinate: 5-90 parts by weight;
Softening agent: 3-10 parts by weight;
nucleating agent: 0.5-1.0 parts by weight;
Melt reinforcing agent: 1.0 to 2.0 parts by weight;
Heat stabilizer: 0.5 to 1.0 weight portions.
Further, the melt index of the poly (succinic acid-adipic acid-butanediol ester) is 22-44g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
Further, the melt index of the polybutylene succinate is 18-31g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
Further, the nucleating agent is one of dibenzoyl hydrazine sebacate, attapulgite clay and calcium phenylphosphonate.
Further, the melt reinforcing agent is one of 1,3-PBO bisoxazoline compound, diphenylmethane diisocyanate and acrylic ester copolymer.
Further, the heat stabilizer is dioctadecyl thiodipropionate and bis (3, 5-di-tert-butyl-4-hydroxy propionyl) hydrazine, and the mass ratio is 1:2, and a mixture thereof.
The invention also provides a preparation method of the modified material for the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps:
Step 1, mixing one or two of poly succinic acid-adipic acid-butanediol ester or poly succinic acid butanediol ester, a softening agent for the super-soft degradable spun-bonded non-woven fabric, a nucleating agent, a melt reinforcing agent and a heat stabilizer according to a proportion to obtain a modified material prefabricated mixture;
and step 2, adding the modified material prefabricated mixture into a double-screw extruder for extrusion to obtain a modified material.
Further, the equipment used in the step 1 is a high-speed mixer, the rotation speed is 500-800rpm, and the mixing time is 3-5min.
Further, the modification material prefabricated mixture in the step 2 enters a double-screw extruder through a main feeding system connected with a first area of the double-screw extruder;
Further, the twin-screw extruder for preparing the modified material comprises eleven temperature areas, wherein the temperatures of the areas are respectively set to be 90-110 ℃ in the first area, 100-130 ℃ in the second area, 150-160 ℃ in the third area, 150-160 ℃ in the fourth area, 150-160 ℃ in the fifth area, 170-180 ℃ in the sixth area, 170-190 ℃ in the seventh area, 170-190 ℃ in the eighth area, 170-190 ℃ in the ninth area, 170-190 ℃ in the tenth area, 170-190 ℃ in the eleven area, the screw speed is 200-400r/min, the feeding speed is 10-30Hz, and the length-diameter ratio is 44:1.
And further, the step 2 comprises granulating and drying after extrusion, wherein equipment used for granulating is a granulator, and drying is drying to remove water.
The invention also provides a super-soft degradable spun-bonded non-woven fabric, which is prepared from the modified material for the super-soft degradable spun-bonded non-woven fabric, wherein the softness of the non-woven fabric is 16.5-19.7mN, the fiber diameter is 18-19 mu m, and the 180-day biological decomposition rate is more than 95.3% under the composting condition.
The invention also provides a preparation method of the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps: the modified material for the super-soft degradable spun-bonded non-woven fabric is added into spun-bonded non-woven fabric production equipment, and the non-woven fabric is obtained through wiredrawing and drafting.
Further, the spun-bonded non-woven fabric production equipment comprises a single-screw extruder, and the modified material enters the single-screw extruder through a main feeding system connected with one zone of the single-screw extruder.
Further, the single screw extruder comprises six temperature areas, wherein the temperatures of the areas are respectively set to 180-200 ℃ in the first area, 190-200 ℃ in the second area, 190-210 ℃ in the third area, 180-190 ℃ in the fourth area, 190-210 ℃ in the fifth area and 180-190 ℃ in the sixth area;
meanwhile, the die head temperature is set to 190-210 ℃, the running frequency of a feeding metering pump is 15-30Hz, the nonwoven lapping setting frequency is 40-60Hz, and the drafting blasting frequency is 40-55Hz.
The invention also provides a non-woven fabric product which is prepared from the super-soft degradable spun-bonded non-woven fabric.
Further, the non-woven fabric product comprises infant paper diapers, female sanitary products, face washing towel, facial masks and wet tissues.
The invention has the beneficial effects that:
1. The softener prepared by a specific raw material formula and proportion, in particular to a fully biodegradable softener which has excellent toughness and has a melt index of 26-39g/10min (PBS) or polybutylene succinate-adipic acid-butanediol (PBSA) at the temperature and the load of 190 ℃ and 2.16kg respectively, wherein all components for preparing the softener are fed in different feeding systems in a partitioning way, and are subjected to melt mixing and extrusion by a specific double-screw extruder to obtain the softener with a melt index of 100-600g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively; adding a softening agent into the modified material, and forming a stable raw material formula with one or two of newly added poly (succinic acid-adipic acid-butylene glycol) (PBSA) or poly (butylene succinate) (PBS) again in the process of preparing the non-woven fabric, so that the softening agent is ensured to migrate outwards in fibers during wiredrawing and drafting, migrate to the surfaces of the fibers, the softness of the non-woven fabric is obviously improved, and finally the non-woven fabric is soft to touch, namely the softness of the non-woven fabric is 16.5-19.7mN, the straight warp of the fiber is 18-19 mu m, the 180-day biological decomposition rate of the non-woven fabric is greater than 95.3% under the composting condition, and the smaller the fiber diameter proves that the fineness and the softness of the non-woven fabric are better under the same spinning condition, so that the softer non-woven fabric prepared by the invention can be widely applied to the fields of infant paper diapers, female sanitary products, face tissues, facial masks, wet tissues and the like;
2. In the process of preparing the softener and preparing the modified material by using the softener, the invention surprisingly finds that the softener with high melt index (the melt index is 26-39g/10min at the temperature of 190 ℃ and the load of 2.16kg respectively) or the PBSA can be used for obtaining the softener with high melt index, and the non-woven fabric has good spinning stability, so that the process of the non-woven fabric prepared in the prior art is simplified, and the preparation method with simple process route, high spinning stability and easy industrialized production is obtained;
3. In the process of preparing the softener, the raw materials are subjected to specific mixing and partition feeding, namely, the polybutylene succinate or the polybutylene succinate-adipic acid-butanediol ester enters a double-screw extruder through a main feeding system connected with a first region of the double-screw extruder, the pre-prepared mixture of the softening auxiliary agent enters the double-screw extruder through a side feeding system connected with a fourth region of the double-screw extruder, the pre-prepared mixture of the softening auxiliary agent is unexpectedly found to have better dispersion degree than the mixture of the raw materials and then fed together, the preparation of the subsequent modified material and the non-woven fabric is improved again, and meanwhile, the screw combination in the double-screw extruder comprises at least one group of SME screw thread elements and at least one group of ZME screw thread elements, so that the weak shearing and strong dispersion of all components in the softener are realized, and the softener which has high dispersion degree and can be used in the preparation process of the ultra-soft degradable non-woven fabric is obtained;
4. In the process of preparing the modified material, the softening agent with a specific melt index is prepared firstly, and then one of the 1,3-PBO bisoxazoline compound, the diphenylmethane diisocyanate and the acrylic ester copolymer is specifically added as the melt reinforcing agent, so that the melt strength of the modified material is further improved, the situation of broken filaments in the spinning process can be avoided in the process of preparing the non-woven fabric, and compared with the non-woven fabric prepared by mixing and spinning raw materials together in the prior art, the non-woven fabric prepared by the invention has finer fiber diameter and better softness under the same spinning condition, and the softening agent and the modified material obtained before preparing the non-woven fabric can be stably stored, so that stable production is ensured again, and the non-woven fabric is more suitable for preparing the non-woven fabric by a production line with high yield.
Drawings
FIG. 1 is a sample of nonwoven fabric prepared in example 5 of the present invention;
FIG. 2 is a scanning electron microscope image of the nonwoven fabric prepared in example 5 of the present invention;
FIG. 3 is a scanning electron microscope image of the nonwoven fabric prepared in comparative example 2 of the present invention.
Detailed Description
Examples 1 to 2 are a softener for super-soft degradable spun-bonded nonwoven fabrics and a preparation method thereof, examples 3 to 4 are a modified material for super-soft degradable spun-bonded nonwoven fabrics prepared from the softener prepared in examples 1 to 2 and a preparation method thereof, and examples 5 to 6 are a super-soft degradable spun-bonded nonwoven fabric prepared from the modified material prepared in examples 3 to 4 and a preparation method thereof.
The melt index measurement standard referred to in the present invention is ASTM D1238; the measurement standard of the softness is GB/T2986-2016; the fiber diameter was measured by scanning electron microscopy.
Example 1
The embodiment provides a softener for super-soft degradable spun-bonded non-woven fabrics, which is prepared by melt mixing poly (butylene succinate) -adipate-butylene glycol (PBSA), hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate through a double-screw extruder, wherein the melt index of the softener is 102g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
The softener comprises the following components in parts by weight:
poly (succinic acid) -adipic acid-butylene ester: 60 parts by weight;
Hydroxymethyl cellulose: 5 parts by weight;
polyethylene glycol: 8 parts by weight;
aliphatic polyamide: 3 parts by weight;
montan wax: 5 parts by weight;
ricinoleic acid: 2 parts by weight;
Glycerol monostearate: 3 parts by weight.
In this example, the melt index of the poly (butylene succinate) -co-adipate was 26g/10min at 190℃and 2.16kg load.
The embodiment also provides a preparation method of the softener for the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps:
Step 1, mixing hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate according to a proportion to obtain a pre-prepared mixture of a softening auxiliary agent;
The equipment for mixing is a high-speed mixer, the rotation speed is 300rpm, and the mixing time is 5min;
step 2, adding the poly succinic acid-adipic acid-butanediol ester and the soft additive prefabricated mixture prepared in the step 1 into a double-screw extruder for extrusion to obtain an extrusion material, and granulating and drying to obtain the softener;
The poly succinic acid-adipic acid-butanediol ester enters the double-screw extruder through a main feeding system connected with a first region of the double-screw extruder, and the soft additive prefabricated mixture enters the double-screw extruder through a side feeding system connected with a fourth region of the double-screw extruder;
the double-screw extruder for preparing the softener comprises thirteen temperature areas, wherein the temperatures of the areas are respectively set to be 110 ℃ in a first area, 130 ℃ in a second area, 150 ℃ in a third area, 170 ℃ in a fourth area, 160 ℃ in a fifth area, 170 ℃ in a sixth area, 180 ℃ in a seventh area, 170 ℃ in an eighth area, 170 ℃ in a ninth area, 170 ℃ in a tenth area, 180 ℃ in an eleventh area, 170 ℃ in a twelve area, 170 ℃ in a thirteenth area, 200r/min of screw speed, 30Hz of feeding speed and 52:1 of length-diameter ratio;
In this embodiment, special elements, namely three sets of SME flighted elements and three sets of ZME flighted elements, are introduced into the screw combination in the twin screw extruder;
Wherein the first set of SME screw elements corresponds to a zone of the twin screw extruder, the second set of SME screw elements corresponds to an eight zone of the twin screw extruder, and the third set of SME screw elements corresponds to a twelve zone of the twin screw extruder; the first set of ZME screw elements corresponds to two zones of the twin screw extruder, the second set of ZME screw elements corresponds to seven zones of the twin screw extruder, and the third set of ZME screw elements corresponds to ten zones of the twin screw extruder.
Example 2
The embodiment provides a softener for super-soft degradable spun-bonded non-woven fabrics, which is prepared by melt mixing polybutylene succinate (PBS), hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate by a double-screw extruder, wherein the melt index of the softener is 579g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively;
The softener comprises the following components in parts by weight:
polybutylene succinate: 80 parts by weight;
Hydroxymethyl cellulose: 3 parts by weight;
polyethylene glycol: 5 parts by weight;
aliphatic polyamide: 5 parts by weight;
montan wax: 10 parts by weight;
ricinoleic acid: 2 parts by weight;
Glycerol monostearate: 5 parts by weight.
In this example, the melt index of the polybutylene succinate at 190℃and 2.16kg was 39g/10min.
The embodiment also provides a preparation method of the softener for the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps:
Step 1, mixing hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate according to a proportion to obtain a pre-prepared mixture of a softening auxiliary agent;
The equipment for mixing is a high-speed mixer, the rotation speed is 800rpm, and the mixing time is 3min;
Step 2, adding the polybutylene succinate and the soft additive prefabricated mixture prepared in the step 1 into a double-screw extruder for extrusion to obtain an extrusion material, and granulating and drying to obtain a softener;
The poly butylene succinate enters the double-screw extruder through a main feeding system connected with a first region of the double-screw extruder, and the soft additive prefabricated mixture enters the double-screw extruder through a side feeding system connected with a fourth region of the double-screw extruder;
the double-screw extruder for preparing the softener comprises thirteen temperature areas, wherein the temperatures of the areas are respectively set to be 120 ℃ in a first area, 140 ℃ in a second area, 160 ℃ in a third area, 160 ℃ in a fourth area, 170 ℃ in a fifth area, 180 ℃ in a sixth area, 170 ℃ in a seventh area, 180 ℃ in an eighth area, 180 ℃ in a ninth area, 180 ℃ in a tenth area, 170 ℃ in an eleventh area, 180 ℃ in a twelve area, 180 ℃ in a thirteenth area, the screw speed is 300r/min, the feeding speed is 50Hz, and the length-diameter ratio is 52:1;
in this embodiment, special elements, i.e. three sets of SME flighted elements and three sets of ZME flighted elements, are introduced into the screw combination in the twin screw extruder;
wherein the first set of SME screw elements corresponds to the two zones of the twin screw extruder, the second set of SME screw elements corresponds to the six zones of the twin screw extruder, and the third set of SME screw elements corresponds to the eleven zones of the twin screw extruder; the first set of ZME screw elements corresponds to three zones of the twin screw extruder, the second set of ZME screw elements corresponds to six zones of the twin screw extruder, and the third set of ZME screw elements corresponds to ten zones of the twin screw extruder.
Example 3
This example is a modified material for preparing a super-soft degradable spun-bonded nonwoven fabric, which is prepared by melt mixing poly (butylene succinate) -adipate (PBSA), poly (butylene succinate) (PBS), the super-soft degradable spun-bonded nonwoven fabric prepared in example 1, a nucleating agent, a melt reinforcing agent and a heat stabilizer, wherein the modified material has a melt index of 42g/10min at 190 ℃ and a load of 2.16kg respectively.
The modified material comprises the following components in parts by weight:
poly (succinic acid) -adipic acid-butylene ester: 90 parts by weight;
Polybutylene succinate: 5 parts by weight;
softening agent prepared in example 1: 3 parts by weight;
nucleating agent dibenzoyl sebacate: 0.5 parts by weight;
Melt enhancer diphenylmethane diisocyanate: 1.0 parts by weight;
Heat stabilizer: 0.5 part by weight of dioctadecyl thiodipropionate and bis (3, 5-di-tert-butyl-4-hydroxy propionyl) hydrazine according to the mass ratio of 1:2, and a mixture thereof.
In this example, the melt index of the poly (succinic-co-adipic acid-butylene glycol) at 190℃and 2.16kg under a temperature and load was 22g/10min;
The melt index of the polybutylene succinate is 18g/10min at the temperature of 190 ℃ and the load of 2.16kg respectively.
The embodiment also provides a preparation method of the modified material for the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps:
Step 1, mixing poly succinic acid-adipic acid-butanediol ester, poly succinic acid butanediol ester, a softening agent for the super soft degradable spun-bonded non-woven fabric prepared in the embodiment 1, a nucleating agent, a melt reinforcing agent and a heat stabilizer according to a proportion to obtain a modified material prefabricated mixture;
the equipment for mixing is a high-speed mixer, the rotation speed is 500rpm, and the mixing time is 3min;
Step 2, adding the modified material prefabricated mixture into a double-screw extruder for extrusion to obtain an extrusion material, and granulating and drying to obtain a modified material;
The modified material prefabricated mixture enters a double-screw extruder through a main feeding system connected with one zone of the double-screw extruder;
The double-screw extruder for preparing the modified material comprises eleven temperature areas, wherein the temperatures of the areas are respectively set to be 110 ℃ in the first area, 130 ℃ in the second area, 150 ℃ in the third area, 160 ℃ in the fourth area, 160 ℃ in the fifth area, 170 ℃ in the sixth area, 170 ℃ in the seventh area, 170 ℃ in the eighth area, 170 ℃ in the ninth area, 170 ℃ in the tenth area, 190 ℃ in the eleven area, the screw speed is 200r/min, the feeding speed is 30Hz, and the length-diameter ratio is 44:1.
Example 4
This example is a modified material for preparing a super-soft degradable spun-bonded nonwoven fabric, which is prepared by melt mixing poly (butylene succinate) -adipate (PBSA), poly (butylene succinate) (PBS), the super-soft degradable spun-bonded nonwoven fabric prepared in example 2, a nucleating agent, a melt reinforcing agent and a heat stabilizer, wherein the modified material has a melt index of 21g/10min at 190 ℃ and a load of 2.16 kg.
The modified material comprises the following components in parts by weight:
poly (succinic acid) -adipic acid-butylene ester: 5 parts by weight;
Polybutylene succinate: 90 parts by weight;
softening agent prepared in example 2: 10 parts by weight;
nucleating agent calcium phenylphosphonate: 1.0 parts by weight;
melt enhancer 1,3-PBO bisoxazoline: 2.0 parts by weight;
heat stabilizer: 1.0 weight portion of dioctadecyl thiodipropionate and bis (3, 5-di-tert-butyl-4-hydroxy propionyl) hydrazine according to the mass ratio of 1:2, and a mixture thereof.
In this example, the melt index of the poly (succinic-co-adipic acid-butylene glycol) at 190℃and 2.16kg under a temperature and load is 44g/10min;
The melt index of the polybutylene succinate is 31g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
The embodiment also provides a preparation method of the modified material for the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps:
Step 1, mixing poly succinic acid-adipic acid-butanediol ester, poly succinic acid butanediol ester, a softening agent for the super soft degradable spun-bonded non-woven fabric prepared in the embodiment 1, a nucleating agent, a melt reinforcing agent and a heat stabilizer according to a proportion to obtain a modified material prefabricated mixture;
the equipment for mixing is a high-speed mixer, the rotation speed is 800rpm, and the mixing time is 5min;
Step 2, adding the modified material prefabricated mixture into a double-screw extruder for extrusion to obtain an extrusion material, and granulating and drying to obtain a modified material;
The modified material prefabricated mixture enters a double-screw extruder through a main feeding system connected with one zone of the double-screw extruder;
The double-screw extruder for preparing the modified material comprises eleven temperature areas, wherein the temperatures of the areas are respectively set to be 90 ℃ in the first area, 100 ℃ in the second area, 160 ℃ in the third area, 150 ℃ in the fourth area, 150 ℃ in the fifth area, 180 ℃ in the sixth area, 190 ℃ in the seventh area, 190 ℃ in the eighth area, 190 ℃ in the ninth area, 190 ℃ in the tenth area, 170 ℃ in the eleven area, the screw speed is 400r/min, the feeding speed is 10Hz, and the length-diameter ratio is 44:1.
Example 5
The present example provides a super-soft degradable spunbonded nonwoven fabric, as shown in fig. 1, which is a sample of the nonwoven fabric prepared in the present example. The non-woven fabric is prepared from the modified material for the super-soft degradable spun-bonded non-woven fabric prepared in the embodiment 3, the softness of the non-woven fabric is 16.5mN, the 180-day biological decomposition rate under the composting condition is 95.3 percent, and the non-woven fabric is a scanning electron microscope image of the non-woven fabric, and the average diameter of fibers is 18.5 mu m as shown in figure 2. The embodiment also provides a preparation method of the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps: the modified material for the super soft degradable spun-bonded non-woven fabric prepared in the example 3 is added into the spun-bonded non-woven fabric production equipment, and the non-woven fabric is obtained through wiredrawing and drafting.
The spun-bonded non-woven fabric production equipment comprises a single-screw extruder, wherein the modified material enters the single-screw extruder through a main feeding system connected with one area of the single-screw extruder;
The single-screw extruder comprises six temperature areas, wherein the temperatures of the areas are respectively set to be 180 ℃ in the first area, 190 ℃ in the second area, 190 ℃ in the third area, 190 ℃ in the fourth area, 190 ℃ in the fifth area and 190 ℃ in the sixth area;
meanwhile, the die head temperature is set to 190 ℃, the running frequency of a feeding metering pump is 15Hz, the nonwoven lapping setting frequency is 40Hz, and the drafting blowing frequency is 40Hz.
Example 6
The present example provides a super-soft degradable spun-bonded nonwoven fabric prepared from the modified material for the super-soft degradable spun-bonded nonwoven fabric prepared in example 4, wherein the softness of the nonwoven fabric is 19.7mN, the 180-day biodegradation rate under composting conditions is 95.6%, and the average diameter of fibers is 18.8 μm.
The embodiment also provides a preparation method of the super-soft degradable spun-bonded non-woven fabric, which comprises the following steps: the modified material for the super soft degradable spun-bonded non-woven fabric prepared in the example 4 is added into the spun-bonded non-woven fabric production equipment, and the non-woven fabric is obtained through wiredrawing and drafting.
The spun-bonded non-woven fabric production equipment comprises a single-screw extruder, wherein the modified material enters the single-screw extruder through a main feeding system connected with one area of the single-screw extruder;
The single-screw extruder comprises six temperature areas, wherein the temperatures of the areas are respectively set to be 200 ℃ in the first area, 200 ℃ in the second area, 210 ℃ in the third area, 180 ℃ in the fourth area, 210 ℃ in the fifth area and 180 ℃ in the sixth area;
meanwhile, the die head temperature is set to 210 ℃, the running frequency of a feeding metering pump is 30Hz, the nonwoven lapping setting frequency is 60Hz, and the drafting blowing frequency is 55Hz.
Comparative example 1
The comparative example was prepared by directly mixing the raw materials with the raw materials for preparing the modified materials in the comparative example without performing specific twin-screw feeding and extrusion granulation on the formulation on the basis of the formulation for preparing the softener in example 2.
That is, this comparative example directly provides a modified material prepared by melt mixing the raw materials and proportions, the nucleating agent, the melt reinforcing agent and the heat stabilizer involved in the softening agent for the super-soft degradable spun-bonded nonwoven fabric prepared in example 2, which are poly succinic acid-butylene glycol (PBSA), poly succinic acid butylene glycol (PBS) and poly succinic acid-butylene glycol (PBSA), and the modified material has a melt index of 15g/10min at a temperature and a load of 190 ℃ and 2.16kg, respectively, with respect to example 4.
The modified material comprises the following components in parts by weight:
poly (succinic acid) -adipic acid-butylene ester: 5 parts by weight;
Polybutylene succinate: 90 parts by weight;
softening agent: 3 parts by weight;
nucleating agent dibenzoyl sebacate: 0.5 parts by weight;
Melt enhancer diphenylmethane diisocyanate: 1.0 parts by weight;
Heat stabilizer: 0.5 part by weight of dioctadecyl thiodipropionate and bis (3, 5-di-tert-butyl-4-hydroxy propionyl) hydrazine according to the mass ratio of 1:2, and a mixture thereof.
In this comparative example, the melt index of the poly (succinic-co-adipic acid-butylene glycol) at 190℃and 2.16kg under a temperature and load was 26g/10min;
The melt index of the polybutylene succinate is 26g/10min at the temperature and the load of 190 ℃ and 2.16 kg.
Wherein, the components and the content of the softener in the comparative example are as follows:
Polybutylene succinate: 74 parts by weight;
Hydroxymethyl cellulose: 5 parts by weight;
polyethylene glycol: 8 parts by weight;
aliphatic polyamide: 3 parts by weight;
montan wax: 5 parts by weight;
ricinoleic acid: 2 parts by weight;
Glycerol monostearate: 3 parts by weight.
In the formulation of the softener of the comparative example, the melt index of the polybutylene succinate at 190 ℃ and 2.16kg respectively was 26g/10min.
The comparative example also provides a preparation method of the modified material, which comprises the following steps:
Step 1, mixing raw materials, a nucleating agent, a melt reinforcing agent and a heat stabilizer which are involved in the softener for the super-soft degradable spun-bonded non-woven fabric prepared in the embodiment 2 with poly (butylene succinate) -adipic acid-butanediol ester, poly (butylene succinate) according to a proportion to obtain a modified material prefabricated mixture;
the equipment for mixing is a high-speed mixer, the rotation speed is 500rpm, and the mixing time is 3min;
Step 2, adding the modified material prefabricated mixture into a double-screw extruder for extrusion to obtain an extrusion material, and granulating and drying to obtain a modified material;
The modified material prefabricated mixture enters a double-screw extruder through a main feeding system connected with one zone of the double-screw extruder;
The double-screw extruder for preparing the modified material comprises eleven temperature areas, wherein the temperatures of the areas are respectively set to be 110 ℃ in the first area, 130 ℃ in the second area, 150 ℃ in the third area, 160 ℃ in the fourth area, 160 ℃ in the fifth area, 170 ℃ in the sixth area, 170 ℃ in the seventh area, 170 ℃ in the eighth area, 170 ℃ in the ninth area, 170 ℃ in the tenth area, 170 ℃ in the eleventh area, the screw speed is 200r/min, the feeding speed is 30Hz, and the length-diameter ratio is 44:1.
The properties of the modified materials prepared in this comparative example were compared with those of examples 3 to 4, and the comparison results are shown in Table 1:
TABLE 1 melt index comparison of the modified materials prepared in examples 3-4 and comparative example 1
Comparative example 2
The comparative example provides a nonwoven fabric prepared from the modified material prepared in comparative example 1, the softness of the nonwoven fabric was 12.4mN, the 180-day biodegradation rate under composting conditions was 94.5%, as shown in FIG. 3, which is a scanning electron microscope image of the nonwoven fabric, and the average diameter of the fibers was 25.7. Mu.m.
The comparative example also provides a preparation method of the non-woven fabric, which comprises the following steps: the modified material prepared in comparative example 1 was added to a spun-bonded nonwoven fabric production apparatus, and a nonwoven fabric was obtained by drawing and drafting.
The spun-bonded non-woven fabric production equipment comprises a single-screw extruder, wherein the modified material enters the single-screw extruder through a main feeding system connected with one area of the single-screw extruder;
The single-screw extruder comprises six temperature areas, wherein the temperatures of the areas are respectively set to be 180 ℃ in the first area, 190 ℃ in the second area, 190 ℃ in the third area, 190 ℃ in the fourth area, 190 ℃ in the fifth area and 190 ℃ in the sixth area;
meanwhile, the die head temperature is set to 190 ℃, the running frequency of a feeding metering pump is 15Hz, the nonwoven lapping setting frequency is 40Hz, and the drafting blowing frequency is 40Hz.
The properties of the nonwoven fabrics prepared in this comparative example were compared with examples 5-6, and the comparison results are shown in Table 2:
TABLE 2 comparison of Properties of nonwoven fabrics prepared in examples 5-6 and comparative example 2
From the visual comparison of examples and comparative examples, tables 1 and 2, it can be seen that: the softener prepared by a specific raw material formula and proportion, in particular to a fully biodegradable softener which has excellent toughness and has a melt index of 26-39g/10min (PBS) or polybutylene succinate-adipic acid-butanediol (PBSA) at the temperature and the load of 190 ℃ and 2.16kg respectively, wherein all components for preparing the softener are fed in different feeding systems in a partitioning way, and are subjected to melt mixing and extrusion by a specific double-screw extruder to obtain the softener with a melt index of 100-600g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively; and then adding the softener into the modified material, and forming a stable raw material formula with one or two of newly added poly (succinic acid-adipic acid-butylene glycol) (PBSA) or poly (butylene succinate) (PBS) again in the process of preparing the non-woven fabric, so that the softener is ensured to migrate outwards in fibers during wiredrawing and drafting, migrate to the surfaces of the fibers, the softness of the non-woven fabric is obviously improved, and finally the non-woven fabric is soft to touch, namely the softness of the non-woven fabric is 16.5-19.7mN, the straight warp of the fiber is 18-19 mu m, the 180-day biological decomposition rate of the non-woven fabric is greater than 95.3% under the composting condition, and the smaller the diameter of the fiber proves that the fineness and the softness of the non-woven fabric are better under the same spinning condition.
It will be understood that the invention is not limited to what has been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (10)
1. The softener for the super-soft degradable spun-bonded non-woven fabric is characterized in that the softener is prepared by melting and mixing one of polybutylene succinate or polybutylene succinate-adipic acid-butanediol ester with hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate through a double-screw extruder, and the melt index of the softener is 100-600g/10min at the temperature and the load of 190 ℃ and at the load of 2.16kg respectively;
The softener comprises the following components in parts by weight:
polybutylene succinate or polybutylene succinate-adipic acid-butylene succinate: 60-80 parts by weight;
Hydroxymethyl cellulose: 3-5 parts by weight;
polyethylene glycol: 5-10 parts by weight;
Aliphatic polyamide: 3-5 parts by weight;
Montan wax: 5-10 parts by weight;
ricinoleic acid: 2-5 parts by weight;
Glycerol monostearate: 3-5 parts by weight;
wherein the melt index of the poly (butylene succinate) or the poly (butylene succinate-co-adipate) is 26-39g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
2. A method for preparing the softening agent for the ultra-soft degradable spun-bonded non-woven fabric according to claim 1, which is characterized by comprising the following steps:
Step 1, mixing hydroxymethyl cellulose, polyethylene glycol, aliphatic polyamide, montan wax, ricinoleic acid and glyceryl monostearate according to a proportion to obtain a pre-prepared mixture of a softening auxiliary agent;
Step 2, adding the polybutylene succinate or the polybutylene succinate-adipic acid-butylene succinate and the soft additive prefabricated mixture prepared in the step 1 into a double-screw extruder for extrusion to obtain a softener;
The preparation method comprises the step (2) of feeding the polybutylene succinate or the polybutylene succinate-adipic acid-butylene succinate into a double-screw extruder through a main feeding system connected with a first region of the double-screw extruder, and feeding the soft additive prefabricated mixture into the double-screw extruder through a side feeding system connected with a fourth region of the double-screw extruder.
3. The method for preparing a softener for ultra-soft degradable spun-bonded non-woven fabrics according to claim 2, wherein a twin-screw extruder for preparing the softener comprises thirteen temperature zones, the temperatures of each zone are respectively set to be 110-120 ℃, 130-140 ℃ in two zones, 150-160 ℃ in three zones, 160-170 ℃ in four zones, 160-170 ℃ in five zones, 170-180 ℃ in six zones, 170-180 ℃ in seven zones, 170-180 ℃ in eight zones, 170-180 ℃ in nine zones, 170-180 ℃ in ten zones, 170-180 ℃ in eleven zones, 170-180 ℃ in twelve zones, 170-180 ℃ in thirteen zones, the screw speed is 200-300r/min, the feeding speed is 30-50Hz, and the length-diameter ratio is 52:1.
4. The modified material for the super-soft degradable spun-bonded non-woven fabric is characterized by being prepared by melt mixing one or two of poly (succinic acid-adipic acid-butanediol ester) or poly (butylene succinate), the softening agent for the super-soft degradable spun-bonded non-woven fabric according to claim 1, a nucleating agent, a melt reinforcing agent and a heat stabilizer, wherein the melt index of the modified material is 21-42g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively;
The modified material comprises the following components in parts by weight:
Poly (succinic acid) -adipic acid-butylene ester: 5-90 parts by weight;
polybutylene succinate: 5-90 parts by weight;
Softening agent: 3-10 parts by weight;
nucleating agent: 0.5-1.0 parts by weight;
Melt reinforcing agent: 1.0 to 2.0 parts by weight;
Heat stabilizer: 0.5 to 1.0 weight portions.
5. The modified material for ultra-soft degradable spun-bonded non-woven fabric according to claim 4, wherein the melt index of the poly (succinic acid-adipic acid-butylene glycol) is 22-44g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively;
The melt index of the polybutylene succinate is 18-31g/10min at the temperature and the load of 190 ℃ and 2.16kg respectively.
6. The modified material for the ultra-soft degradable spun-bonded non-woven fabric according to claim 4, wherein the nucleating agent is one of dibenzoyl hydrazine sebacate, attapulgite clay and calcium phenylphosphonate;
the melt reinforcing agent is one of 1,3-PBO bisoxazoline compound, diphenylmethane diisocyanate and acrylic ester copolymer;
the heat stabilizer is dioctadecyl thiodipropionate and bis (3, 5-di-tert-butyl-4-hydroxy propionyl) hydrazine according to the mass ratio of 1:2, and a mixture thereof.
7. A method for preparing the modified material for the ultra-soft degradable spun-bonded non-woven fabric according to any one of claims 4 to 6, which is characterized by comprising the following steps:
step 1, mixing one or two of poly succinic acid-adipic acid-butanediol ester or poly succinic acid butanediol ester, the softening agent for the super soft degradable spun-bonded non-woven fabric, a nucleating agent, a melt reinforcing agent and a heat stabilizer according to a proportion to obtain a modified material prefabricated mixture;
step2, adding the modified material prefabricated mixture into a double-screw extruder for extrusion to obtain a modified material;
Wherein, the modification material prefabricated mixture in the step 2 enters the double-screw extruder through a main feeding system connected with one zone of the double-screw extruder.
8. The super-soft degradable spun-bonded non-woven fabric is characterized in that the non-woven fabric is prepared from the modified material for the super-soft degradable spun-bonded non-woven fabric according to any one of claims 4-6, the softness of the non-woven fabric is 16.5-19.7mN, the fiber diameter is 18-19 mu m, and the 180-day biological decomposition rate under the composting condition is more than 95.3%.
9. A method of making the ultra-soft degradable spunbonded nonwoven of claim 8, comprising the steps of: adding the modified material for the super-soft degradable spun-bonded non-woven fabric according to any one of claims 4-6 into spun-bonded non-woven fabric production equipment, and drawing to obtain the non-woven fabric.
10. A nonwoven fabric article, wherein the nonwoven fabric article is prepared from the ultra-soft degradable spunbond nonwoven fabric of claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411254314.4A CN118773918B (en) | 2024-09-09 | Softener for super-soft degradable spun-bonded non-woven fabric, and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411254314.4A CN118773918B (en) | 2024-09-09 | Softener for super-soft degradable spun-bonded non-woven fabric, and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN118773918A true CN118773918A (en) | 2024-10-15 |
| CN118773918B CN118773918B (en) | 2024-11-19 |
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