CN114182433A - Preparation method of modified cotton wadding - Google Patents
Preparation method of modified cotton wadding Download PDFInfo
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- CN114182433A CN114182433A CN202111476455.7A CN202111476455A CN114182433A CN 114182433 A CN114182433 A CN 114182433A CN 202111476455 A CN202111476455 A CN 202111476455A CN 114182433 A CN114182433 A CN 114182433A
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- Prior art keywords
- cotton
- flocculus
- modified
- polyoxyethylene
- polyethylene
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- 229920000742 Cotton Polymers 0.000 title claims abstract description 101
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- -1 polyethylene Polymers 0.000 claims abstract description 54
- 239000004698 Polyethylene Substances 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 28
- 229920000573 polyethylene Polymers 0.000 claims abstract description 28
- 229920003171 Poly (ethylene oxide) Polymers 0.000 claims abstract description 26
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 25
- 238000009960 carding Methods 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 14
- 230000008569 process Effects 0.000 claims description 14
- 239000002904 solvent Substances 0.000 claims description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 6
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical group C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 claims description 6
- 239000012965 benzophenone Substances 0.000 claims description 6
- 239000003995 emulsifying agent Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims 2
- 230000035699 permeability Effects 0.000 abstract description 16
- 238000005507 spraying Methods 0.000 abstract description 15
- 230000009471 action Effects 0.000 abstract description 6
- 238000007493 shaping process Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000005286 illumination Methods 0.000 abstract description 4
- 238000010526 radical polymerization reaction Methods 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 description 19
- 230000000052 comparative effect Effects 0.000 description 12
- 230000006835 compression Effects 0.000 description 11
- 238000007906 compression Methods 0.000 description 11
- 238000006116 polymerization reaction Methods 0.000 description 9
- 238000001723 curing Methods 0.000 description 8
- 238000011084 recovery Methods 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 238000004132 cross linking Methods 0.000 description 7
- 238000004321 preservation Methods 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 239000000835 fiber Substances 0.000 description 5
- 238000003672 processing method Methods 0.000 description 4
- 238000003756 stirring Methods 0.000 description 4
- 238000001467 acupuncture Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 229920000191 poly(N-vinyl pyrrolidone) Polymers 0.000 description 3
- 239000004753 textile Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 229920003020 cross-linked polyethylene Polymers 0.000 description 2
- 239000004703 cross-linked polyethylene Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 229920002521 macromolecule Polymers 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000009432 framing Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000638 stimulation Effects 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/02—Cotton wool; Wadding
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4282—Addition polymers
- D04H1/4291—Olefin series
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling
- D04H1/46—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties the fleeces or layers being consolidated by mechanical means, e.g. by rolling by needling or like operations to cause entanglement of fibres
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
- D06M10/00—Physical treatment of fibres, threads, yarns, fabrics, or fibrous goods made from such materials, e.g. ultrasonic, corona discharge, irradiation, electric currents, or magnetic fields; Physical treatment combined with treatment with chemical compounds or elements
- D06M10/001—Treatment with visible light, infrared or ultraviolet, X-rays
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2201/00—Cellulose-based fibres, e.g. vegetable fibres
- D10B2201/01—Natural vegetable fibres
- D10B2201/02—Cotton
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Abstract
The invention discloses a preparation method of a modified cotton flocculus, which comprises the steps of carding cotton flocculus and needling the cotton flocculus, spraying an auxiliary agent A on the needled cotton flocculus, drying, shaping and carrying out ultraviolet curing, wherein the auxiliary agent A comprises polyethylene, polyoxyethylene and a photoinitiator; polyethylene and polyoxyethylene are introduced into cotton flocculus, and the polyethylene, the polyoxyethylene and cotton fibers are subjected to free radical polymerization under the action of ultraviolet illumination and a photoinitiator to form a net structure between the cotton flocculus, so that a framework and a fixing effect are achieved between the cotton fibers, and the resilience and the air permeability of the cotton flocculus are improved; the resilience of the cotton wadding sheet modified by the method is improved, and the cotton wadding sheet has better air permeability; the method is simple to operate, low in cost and easy to popularize in a market.
Description
Technical Field
The invention relates to a preparation method of a cotton flocculus, in particular to a preparation method of a modified cotton flocculus.
Background
The cotton has low price and good heat retention, has no stimulation to human body, is popular with people, and is mainly used for making cotton bedding. However, the cotton has the greatest defects that the weight is increased after moisture absorption, the cotton is easy to harden, and the bulkiness and the heat retention degree are reduced along with the increase of the weight. The quilt and the cotton-padded mattress made of cotton lose the original fluffy, warm-keeping and comfortable feelings due to the fact that the quilt and the cotton-padded mattress are heavy after being used for a period of time.
At present, in order to improve the fluffy degree and the warmth retention degree of cotton flocculus, the method of often adopting is to add synthetic fiber or wool fiber that elasticity is better, and the resilience of cotton flocculus can be promoted at certain degree in the addition of relevant fibre, nevertheless can also cause the flocculus gas permeability variation simultaneously, perhaps leads to the cost to promote by a wide margin, can not promote by a large scale.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide a preparation method of a modified cotton wadding sheet with better resilience and air permeability.
The technical scheme is as follows: the processing method of the modified cotton flocculus comprises the steps of carding and needling the cotton flocculus, spraying an auxiliary agent A on the needled cotton flocculus, drying and shaping, and carrying out ultraviolet curing, wherein the auxiliary agent A comprises polyethylene, polyoxyethylene and a photoinitiator.
The molecular weight of the polyoxyethylene is 2K-8K, and the molecular weight of the polyethylene is 5K-12K. In the molecular weight region, polyoxyethylene and polyethylene macromolecules have good compatibility, and the viscosity state of the molten state is good, so that the subsequent grafting and crosslinking reaction is facilitated. The molecular weight is too low, the required grafting reaction energy is small, the reaction is violent, the reaction cannot be controlled at high temperature, and meanwhile, the modified flocculus has poor flexibility and the comfort degree is influenced; the molecular weight is too large, the reaction is slow, the required temperature is high, the macromolecular compatibility is poor, the reaction is incomplete, the modified flocculus has insufficient elasticity, and the moldability and the shape retention are poor.
The photoinitiator is benzophenone and derivatives thereof. Under the irradiation of ultraviolet light, the photoinitiator absorbs the ultraviolet light with specific wavelength to initiate the free radical polymerization reaction of polyethylene, polyoxyethylene and cotton fiber. The benzophenone and the derivatives thereof have high catalytic efficiency, low dosage and good catalytic effect.
The auxiliary agent A comprises the following components in parts by weight: 3-5 parts of polyoxyethylene, 15-20 parts of polyethylene, 1-3 parts of a photoinitiator, 0.5-1 part of an emulsifier and 72-80.5 parts of a solvent, wherein the solvent is water or ethanol, and the dosage of the auxiliary A is 3-5% of the mass of the cotton flocculus.
The preparation process of the auxiliary A in the step is as follows: firstly, adding a solvent into a reaction kettle, then sequentially adding powdered polyethylene, powdered polyoxyethylene, a photoinitiator and an emulsifier, adjusting the temperature to 40-60 ℃, and stirring until a stable uniform system is formed for later use.
The spraying method of the auxiliary agent A comprises the following steps: and a double-sided spraying mode is adopted to ensure uniform spraying, and the using amount of the auxiliary agent A is 3-5% of the mass of the cotton flocculus. The dosage of the auxiliary agent A is too small, the crosslinking reaction degree of polyethylene and polyoxyethylene and cotton fibers is low, the formed net structure is less, the framework and the fixing action among the cotton fibers are weaker, and the compression resilience of cotton flocculus is reduced; the addition agent A is excessively used, and the crosslinking reaction of polyethylene and polyoxyethylene and cotton fiber is excessive, so that the cotton wadding is poor in air permeability and hard in hand feeling.
And drying and shaping at the temperature of 130-140 ℃ until the solvent in the auxiliary A is completely volatilized.
The ultraviolet curing method comprises the following steps: and (5) irradiating by ultraviolet until the auxiliary A is completely fixed.
The cotton fiber of the cotton flake for cotton carding is 30-40mm, and the gram weight of the cotton flake after cotton carding is 500 g/m-2。
The invention mechanism is as follows: the processing method of the modified cotton wadding sheet comprises the steps of spraying polyethylene and polyoxyethylene onto a cotton wadding sheet subjected to needling treatment, and then carrying out polymerization crosslinking reaction on the polyethylene and the polyoxyethylene under the combined action of ultraviolet light and a photoinitiator under the action of ultraviolet light, wherein the polymerization crosslinking reaction specifically comprises the following three reactions: polymerization reaction occurs between polyethylenes, as shown in equation (1); the polyoxyethylene and the hydroxyl on the cellulose are subjected to dehydration polymerization reaction as shown in the reaction equation (2); radical polymerization occurs between polyethylene and polyoxyethylene, as in equation (3). The polymerization reaction between polyethylene is the main reaction, ultraviolet light is utilized to irradiate under the molten state, the photoinitiator absorbs ultraviolet light with specific wavelength and then initiates the polyethylene to generate free radicals, the free radicals generate a series of rapid polymerization reactions to form crosslinked polyethylene with a three-dimensional network structure, the crosslinked polyethylene plays a role in framing and fixing among cotton fibers of the cotton wadding, and the permanent stable structure can be endowed to the cotton fiber wadding. The polyoxyethylene can have polymerization reaction with polyethylene and also can have polymerization reaction with cellulose, so that the cotton fiber macromolecules and the polyethylene reticular molecular structure have indirect connection effect, and the stability and the durability of the cotton fiber flocculus structure are further improved. Meanwhile, the polyoxyethylene has better hydrophilic and soft effects, can effectively improve the hand feeling of the cotton fiber flocculus and endows the flocculus with better soft and fluffy effects.
-[CH2-CH2]n-+-[CH2-CH2]n-→-[CH2-CH2]n- (1)
CELL-OH+-[CH2O-CH2O]n-→CELL-O-[CH-CH2O]n-+H2O (2)
-[CH2-CH2]n-+-[CH2O-CH2O]n-→-[CH2-CH2O]n-+H2O (3)
Has the advantages that: compared with the prior art, the invention has the following remarkable advantages: (1) the method introduces polyethylene and polyoxyethylene into the cotton flocculus, and the polymerization reaction is carried out between the cotton flocculus to form a net structure, so that the framework and the fixing action are realized between cotton fibers, and the resilience performance and the air permeability of the cotton flocculus are improved; (2) the resilience and air permeability of the cotton wadding sheet modified by the method are improved; (3) the method is simple to operate, low in cost and easy to popularize in a market.
Detailed Description
The technical solution of the present invention is further illustrated by the following examples.
Example 1
The preparation method of the cotton flocculus comprises the following steps:
(1) cotton carding
Length of choiceThoroughly removing impurities from cotton fiber with a density of 30-40mm, and carding the cotton fiber with a carding machine to obtain cotton fiber with a grammage of 100g m-2The cotton fiber flocculus.
(2) Acupuncture and moxibustion
Carrying out needling treatment on the cotton fiber flocculus on a needling machine, wherein the needling process comprises the following steps: needling density of 30 spines cm-2The needling depth is 5mm, the needling speed is 20 times/min, the pre-feeding speed is 1m/min, and the pre-discharging speed is 2 m/min.
(3) Spray assistant A
Preparation of an auxiliary agent A: adding 80.5 parts of ethanol, 15 parts of polyethylene with molecular weight of 5K-12K, 3 parts of polyoxyethylene with molecular weight of 2K-8K, 1 part of benzophenone and 0.5 part of peregal O (emulsifier) into a reaction kettle in sequence, adjusting the temperature of the system to 40 ℃, and stirring to form a stable uniform system for later use.
The method adopts an online spraying mode, the specific process is double-sided opposite spraying, the auxiliary agent A is uniformly added to the needled cotton fiber flocculus, and the using amount of the auxiliary agent A is 3 percent of the mass of the flocculus.
(4) Drying and shaping: the drying temperature is 130 ℃, and the drying is carried out until the solvent in the auxiliary agent A is completely volatilized.
(5) Ultraviolet irradiation curing: the power of an ultraviolet lamp is 1KW, and the auxiliary agent A is completely fixed by illumination.
Example 2
The processing method of the cotton flocculus comprises the following steps:
(1) cotton carding
Selecting cotton fiber with length of 30-40mm, thoroughly removing impurities from the cotton fiber, and carding the cotton fiber in a carding machine to obtain cotton fiber with grammage of 300g m-2The cotton fiber flocculus.
(2) Acupuncture and moxibustion
Carrying out needling treatment on the cotton fiber flocculus on a needling machine, wherein the needling process comprises the following steps: needling density of 40 needling cm-2The needling depth is 8mm, the needling speed is 25 times/min, the pre-feeding speed is 0.8m/min, and the pre-discharging speed is 1.5 m/min.
(3) Spray assistant A
Preparation of an auxiliary agent A: adding 75.7 parts of water, 18 parts of polyethylene with molecular weight of 5K-12K, 4 parts of polyoxyethylene with molecular weight of 2K-8K, 1.5 parts of benzophenone and 0.8 part of peregal O (emulsifier) into a reaction kettle in sequence, adjusting the temperature of the system to 50 ℃, and stirring to form a stable and uniform system for later use.
The method adopts an online spraying mode, the specific process is double-sided opposite spraying, the auxiliary agent A is uniformly added to the needled cotton fiber flocculus, and the using amount of the auxiliary agent A is 4 percent of the mass of the flocculus.
(4) Baking and shaping: the drying temperature is 135 ℃, and the drying is carried out until the solvent in the auxiliary agent A is completely volatilized.
(5) Ultraviolet curing: the power of an ultraviolet lamp is 1.5KW, and the auxiliary A is completely fixed by illumination.
Example 3
The processing method of the cotton flocculus comprises the following steps:
(1) cotton carding
Selecting cotton fiber with length of 30-40mm, thoroughly removing impurities from the cotton fiber, and carding the cotton fiber in a carding machine to obtain cotton fiber with gram weight of 500g m-2The cotton fiber flocculus.
(2) Acupuncture and moxibustion
Carrying out needling treatment on the cotton fiber flocculus on a needling machine, wherein the needling process comprises the following steps: needling density of 50 needling cm-2The needling depth is 10mm, the needling speed is 30 times/min, the pre-feeding speed is 1m/min, and the pre-discharging speed is 2 m/min.
(3) Spray assistant A
Preparation of an auxiliary agent A: adding 72 parts of water, 20 parts of polyethylene with molecular weight of 5K-12K, 5 parts of polyoxyethylene with molecular weight of 2K-8K, 2 parts of benzophenone and 1 part of peregal O (emulsifier) into a reaction kettle in sequence, adjusting the temperature of the system to 60 ℃, and stirring to form a stable uniform system for later use.
The method adopts an online spraying mode, the specific process is double-sided opposite spraying, the auxiliary agent A is uniformly added to the needled cotton fiber flocculus, and the dosage of the auxiliary agent A is 5 percent of the mass of the flocculus.
(4) Baking and shaping: the drying temperature is 140 ℃, and the drying is carried out until the solvent in the additive A is completely volatilized.
(5) Ultraviolet curing: the power of an ultraviolet lamp is 2KW, and the auxiliary agent A is completely fixed by illumination.
Comparative example 1
On the basis of the embodiment 1, the spraying assistant A, the drying and the ultraviolet curing are not carried out on the needled fiber, and other process conditions are the same.
Comparative example 2
On the basis of the embodiment 2, the spraying assistant A, the drying and the ultraviolet curing are not carried out on the needled fiber, and other process conditions are the same.
Comparative example 3
On the basis of the embodiment 3, the spraying assistant A, the drying and the ultraviolet curing are not carried out on the needled fiber, and other process conditions are the same.
Comparative example 4
Comparative example 3 differs from example 1 in that the amount of spray aid a used was 2% and the other process conditions were the same.
Comparative example 5
Comparative example 4 differs from example 1 in that the amount of spray aid a used was 6% and the other process conditions were the same.
The thickness, air permeability, compression resilience and heat preservation performance of the cotton wadding sheet are tested by the following method:
and (3) thickness testing: reference GB/T24218-2009 test method for textile nonwovens part 2: thickness measurement test.
Test basis GB/T5453-1997 determination of textile fabric air Permeability
Testing the heat preservation performance: the test is carried out by referring to the test method of GB/T11048-1989 textile thermal insulation performance.
And (3) testing compression resilience: refer to FZ/T64003-2011 spray bonded Cotton batting
The test results are shown in Table 1.
Table 1 cotton batting performance test results
As can be seen from the test results in table 1 above, in example 1, compared with comparative example 1, the air permeability is improved by 13.1%, the compression recovery rate is improved by 40.1%, and the heat preservation rate is improved by 5.5%; compared with the comparative example 2, the air permeability is increased by 11.5%, the compression recovery rate is increased by 34.1%, and the heat preservation rate is increased by 5.7%; compared with the comparative example 3, the air permeability of the composite material is increased by 16.5%, the compression recovery rate is increased by 29.2%, and the heat preservation rate is increased by 6.0%. After the needled cotton wool sheet is sprayed with the aid A, dried, shaped and cured by ultraviolet light, the air permeability of the cotton wool sheet is increased by more than 11%, the compression recovery rate is increased by more than 29%, and the heat preservation rate is increased by more than 5%.
In comparative example 4, the air permeability was increased as compared with example 1, but the compression recovery rate and the heat retention rate were decreased. The reason is that the consumption of the auxiliary agent A is reduced, the crosslinking reaction degree of polyethylene and polyoxyethylene and cotton fibers is low, the formed net structure is less, the framework and the fixing action among the cotton fibers are weaker, and the compression recovery rate and the heat preservation rate of the cotton flocculus are reduced.
Comparative example 5 showed a greater reduction in air permeability and slight reductions in compression recovery and insulation compared to example 1. The reason is that the dosage of the additive A is increased, the crosslinking reaction of polyethylene and polyoxyethylene and cotton fiber is excessive, and although the flocculus has better compression recovery performance, the air permeability is poor, the hand feeling is hard, and the comfort degree is influenced.
Claims (10)
1. The preparation method of the modified cotton flocculus comprises the steps of carding and needling the cotton flocculus, and is characterized in that the needled cotton flocculus is sprayed with an auxiliary agent A, dried, shaped and subjected to ultraviolet curing, wherein the auxiliary agent A comprises polyethylene, polyoxyethylene and a photoinitiator.
2. The process for preparing modified cotton batting according to claim 1, wherein the auxiliary agent a comprises, in parts by weight: 3-5 parts of polyoxyethylene, 15-20 parts of polyethylene, 1-3 parts of photoinitiator, 0.5-1 part of emulsifier and 72-80.5 parts of solvent, wherein the solvent is water or ethanol.
3. The process for the preparation of modified batting according to claim 1 or claim 2 wherein the polyoxyethylene has a molecular weight of from 2K to 8K.
4. A process for the preparation of a modified batt according to claim 1 or 2, wherein said polyethylene has a molecular weight of 5K to 12K.
5. A process for the preparation of a modified cotton batt according to claim 1 or 2 wherein said photoinitiator is benzophenone and derivatives thereof.
6. The method for preparing the modified cotton wool sheet according to claim 2, wherein the amount of the aid A is 3-5% of the mass of the cotton wool sheet.
7. The method for preparing the modified cotton wool chip according to claim 1, wherein the drying and setting temperature is 130-140 ℃.
8. The process for preparing a modified batt of claim 1 wherein said uv curing conditions are uv light.
9. The method for preparing the modified cotton wool chip according to claim 1, wherein the cotton fibers of the cotton wool chip for cotton carding are 30-40 mm.
10. The method for preparing the modified cotton wool chip as claimed in claim 1, wherein the weight of the cotton wool chip after carding is 500g/m2。
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| CN202111476455.7A CN114182433A (en) | 2021-12-06 | 2021-12-06 | Preparation method of modified cotton wadding |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111476455.7A CN114182433A (en) | 2021-12-06 | 2021-12-06 | Preparation method of modified cotton wadding |
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2021
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