CN109112724B - Washable and antibacterial spunlace nonwoven material and preparation method thereof - Google Patents
Washable and antibacterial spunlace nonwoven material and preparation method thereof Download PDFInfo
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- CN109112724B CN109112724B CN201811193588.1A CN201811193588A CN109112724B CN 109112724 B CN109112724 B CN 109112724B CN 201811193588 A CN201811193588 A CN 201811193588A CN 109112724 B CN109112724 B CN 109112724B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/44—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
- D04H1/492—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 by fluid jet
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
Abstract
The invention relates to the field of non-woven materials, and discloses a washable and antibacterial spunlace non-woven material and a preparation method thereof, wherein a base material of the non-woven material is formed by mutually intertwining fibers through spunlace processing, and longitudinal fiber intertwining strips arranged in parallel and transverse fiber intertwining strips arranged in parallel are formed after the fibers are intertwined; the longitudinal fiber entanglement strips and the transverse fiber entanglement strips are connected at mutual intersection points to surround to form holes which are arranged in parallel in the longitudinal direction and the transverse direction, and the holes are uniformly distributed on the base material in a tetragonal continuous non-boundary mode; the fiber comprises at least 20wt% of copper modified antibacterial fiber. The washable antibacterial spunlace nonwoven material has the advantages of high mechanical strength, good washability, lasting and obvious antibacterial effect and environment-friendly production process.
Description
Technical Field
The invention relates to the field of non-woven materials, in particular to a washable and antibacterial spunlace non-woven material and a preparation method thereof.
Background
In the process of processing the fiber by adopting the spunlace process, the process of rigidly extruding and damaging the fiber does not exist, so that the physical and mechanical properties of the fiber are not influenced, and the inherent softness of the fiber web is maintained to the maximum extent. Therefore, the spunlace nonwoven material has the characteristics of high strength, soft hand feeling, good drapability, good air permeability and the like, and is widely applied to the fields of medical treatment and health, industrial materials and the like.
Currently, the medical and health field is the largest application market of spunlace nonwoven materials, and with the continuous expansion of downstream application fields and the upgrading requirements of consumers, the functional requirements of spunlace nonwoven materials are also continuously increasing, especially for personal care products and sanitary cleaning materials, such as: kitchen wiping cloth, medical protective clothing, masks, sanitary towels, paper diapers, medical dressing pastes, medical plaster pastes and the like all put forward requirements on the antibacterial property or the antibacterial property of materials, so that the research and development of nonwoven materials with antibacterial or bacteriostatic functions become a hotspot of the industry.
CN201611271889.2 discloses an antibacterial non-woven fabric, which comprises a base fabric layer, wherein coatings are arranged on two sides of the base fabric layer; the coating comprises the following components in parts by mass: 100 parts of water-based PU resin, 4 parts of foaming agent, 5 parts of foam stabilizer, 1 part of flatting agent, 1.6 parts of thickening agent and 1.5 parts of water-based color paste; wherein the leveling agent is an organic silicon leveling agent, the thickening agent is a polyurethane non-alkaline thickening agent, the water-based PU resin is water-based foamed PU resin, the viscosity of the water-based PU foamed resin is 3000-10000Pa.s at the temperature of 25 ℃, the solid content is 30-50 percent, and the 100 percent modulus is 0.5-3 MPa; wherein the foaming agent is anionic higher fatty alcohol sulfuric acid foaming agent, the foam stabilizer is ammonium stearate solution, and the stearic acid accounts for 50-80% of the solution according to the mass content of the stearic acid; the base cloth layer in the invention has good antibacterial effect, no harm to human body, strong antibacterial and bactericidal effects, fine and smooth appearance, good water absorption, water washing resistance, environmental protection, sanitation and safe use, and can be used for cleaning kitchenware and scrubbing articles. The technical scheme has the defects of complex process flow and high cost.
CN201710652317.7 discloses a preparation process of medical antibacterial non-woven fabric, relating to the technical field of non-woven fabric production, the medical antibacterial non-woven fabric comprises a basic non-woven fabric fiber net which is impregnated by chitosan, an adhesive and an upper layer and a lower layer of foam dressing which can absorb penetrating fluid, the invention also discloses a preparation process of the medical antibacterial non-woven fabric, which comprises six process steps of preparing a base non-woven fabric fiber net, preparing a foam dressing, spraying, dipping, drying, cooling, cutting and coiling, adopts the dipping treatment of the antibacterial agent chitosan, the chitosan is extracted from natural plants, the foam dressing is made of polyvinyl alcohol, is made of polyvinyl alcohol foam, has strong water absorption performance, is not easy to fall off dressing fibers, has capillary action, and can well absorb penetrating fluid of a wound of a patient. The defects of the scheme are that the material cost is too high and the processing technology is complex.
CN201810121278.2 discloses an antibacterial non-woven fabric, which comprises a liquid-leaking fabric layer, a liquid-leaking primer layer and an antibacterial layer clamped in the middle, wherein the antibacterial layer is formed by rolling and ironing a double-layer non-woven fabric and a resin layer, the resin layer is laid in the middle of the double-layer non-woven fabric, the surface of the double-layer non-woven fabric is plated with silver, the double-layer non-woven fabric and the resin layer are fixedly connected in a needling manner, the outer surface of the double-layer non-woven fabric is uniformly distributed with breathable micropores, the resin layer is made of an acrylic acid material, one side of the double-layer non-woven fabric is plated with silver, the resin layer replaces a traditional wood pulp material, the resin layer made of resin powder is more refined, and the water absorption effect is good; the close-fitting surface layer is plated with silver to kill contacted bacteria; the whole absorbing layer can not be agglomerated into blocks by rolling and ironing, so that the comfort level is high; the needling and gas permeable pores improve gas permeability. The defects of the scheme are that the material has hard hand feeling and poor air permeability.
In summary, the existing antibacterial and bacteriostatic non-woven materials mainly have the following problems:
1. the antibacterial and bacteriostatic properties are not lasting
Most of the traditional antibacterial and bacteriostatic materials adopt an after-finishing technology, namely, the antibacterial agent is applied to the materials through a subsequent finishing and shaping process of the materials. The after-finishing process is relatively simple, but with the increase of the use time, especially after multiple water washes, the antibacterial and bacteriostatic effects are greatly reduced, so that the antibacterial effect cannot be achieved in the later period.
2. The processing process is not favorable for environmental protection
The post-finishing method is adopted to apply the antibacterial agent to the processing process of the non-woven material, so that the waste water discharge is generated, and the environmental protection is not facilitated.
In view of the above problems, the market needs a novel antibacterial and bacteriostatic non-woven material with obvious and durable antibacterial and bacteriostatic effects and green and environment-friendly production process.
Disclosure of Invention
In order to solve the technical problems, the invention provides the washable antibacterial spunlace nonwoven material and the preparation method thereof.
The specific technical scheme of the invention is as follows: a washable and bacteriostatic spunlace nonwoven material is characterized in that a base material is formed by fibers which are mutually entangled through spunlace processing, and longitudinal fiber entanglement strips arranged in parallel and transverse fiber entanglement strips arranged in parallel are formed after the fibers are entangled; the longitudinal fiber entanglement strips and the transverse fiber entanglement strips are connected at mutual intersection points to surround to form holes which are arranged in parallel in the longitudinal direction and the transverse direction, and the holes are uniformly distributed on the base material in a tetragonal continuous non-boundary mode; the fiber comprises at least 20wt% of copper modified antibacterial fiber.
The invention adopts the technical scheme for the following reasons:
1. the spunlace nonwoven technology continuously sprays the fiber web through high-pressure water flow, and the fibers in the fiber web move and displace to rearrange and intertwine with each other under the action of water power, so that the fiber web is reinforced to obtain certain physical and mechanical properties. In this scheme, parallel arrangement's vertical fiber strip and horizontal fiber strip interconnect are integrative, appear on the cloth cover indulge horizontal parallel arrangement's hole, this kind of adjacent mesh indulges horizontal side by side cloth cover structure, compare with the cloth cover for planar ordinary plain weave spunlace cloth and adjacent mesh staggered arrangement's ordinary mesh spunlace cloth, fibrous kinking point and cohesion point in the material have been increased, the elongation at break of material has been reduced, the structural stability of material has been improved, be favorable to the washability of material more.
2. The antibacterial effect of the copper modified antibacterial fiber is mainly realized by the contact reaction of copper ions. The chemical property of copper ion is very active and keeps quite high activity, the copper ion can be slowly released and dissociated from the fiber to the surface of the spunlace material in the using process, when trace copper ion contacts with the cell of microorganism, the copper ion is attracted with the cell membrane with negative charge to be firmly combined with the cell membrane, the copper ion penetrates through the cell membrane to enter the bacteria to react with the group on the protein in vivo, so that the protein is solidified, the activity of cell synthetase is damaged, the cell loses the ability of division and proliferation to die, and the aims of antibiosis and sterilization are achieved. Because copper ions have strong redox properties, they can inhibit a variety of pathogens, mainly through interaction with oxygen molecules, essentially the effect of oxygen radicals. The outer membrane of the bacterium, the genetic material of the bacterium, can be destroyed by free radicals, eventually leading to bacterial death. Therefore, the spunlace material prepared from the copper modified antibacterial fibers has the performances of antibiosis, bacteriostasis, mildew prevention and the like, has lasting antibiosis, sterilization and bacteriostasis functions, and is safe and harmless to human bodies.
Preferably, the copper-modified antibacterial fiber contains 2-30 wt% of copper fine particles; the average particle diameter of the copper fine particles is less than or equal to 0.5 μm, and the maximum particle diameter is 0.8 μm.
The particle size of the copper fine particles affects the bacteriostatic activity of the material. When the particle size of the copper fine particles is too large or the particle size deviation is too large, the problems of agglomeration, difficult dispersion and the like are caused in the process of mixing and granulating the copper fine particles and polyester chips, so that the distribution of the dispersing agent in the antibacterial fiber is not uniform, and the antibacterial effect of the material is influenced.
Preferably, the copper-modified antibacterial fiber is a fiber with a special-shaped cross section, and the shape of the special-shaped cross section is a triangle, a Y-shaped or a cross.
The team of the invention finds that the cross-sectional shape of the fibers has a significant influence on the strength of the nonwoven material in the spunlace process through long-term research. The copper modified antibacterial fiber section is the dysmorphism cross-section in the present case, and under the impact of high-pressure water needle, the area of contact between the dysmorphism cross-section fibre will be greater than the area of contact between the ordinary circular cross-section fibre, and the fibre frictional force between each other increases, has strengthened the effect and the effect of holding power. Therefore, the spunlace material produced by the copper modified antibacterial fiber with the special-shaped cross section has more stable internal fiber entanglement, higher breaking strength and better washability in the subsequent use process.
According to the invention, the special-shaped section fiber is selected to prepare the non-woven material, and when the non-woven material is rubbed with a contacted body in the use process, on one hand, the surface area of the special-shaped section is larger, so that the release of copper particles from the fiber is more facilitated; on the other hand, the friction force between the fibers with the special-shaped cross sections and the wiped surface is larger, and the friction force generated between the fibers with the special-shaped cross sections is also larger, so that the release of copper particles is theoretically facilitated, and a better antibacterial effect is realized. And as previously mentioned, the nonwoven material of the present invention of the special structure has higher physical strength, and the nonwoven material is more resistant to friction, so that it can completely withstand the above-mentioned higher friction force compared with the general nonwoven material.
More preferably, the copper-modified antibacterial fiber adopts a mixture of 40-60% of Y-shaped cross section and 40-60% of cross-shaped cross section.
In the technical scheme, 40-60% of Y-shaped section and 40-60% of cross-shaped section are preferably mixed, and experiments show that the combined fiber has the best technical effect. The cross-shaped profiled fiber has the advantages that compared with other profiled cross-section fibers, the cross-shaped profiled fiber has the largest contact area with a wiped object in the use process of the material, so that the release of copper ions is facilitated, and the antibacterial effect of the material is improved; in addition, the Y-shaped fibers and the cross-shaped fibers are mixed, and the Y-shaped fibers and the cross-shaped fibers can be embedded into a whole more tightly through the puncture effect of high-pressure water flow in the spunlace reinforcement process, so that the fiber entanglement efficiency is highest, the breaking strength and the friction performance of the material are favorably improved, and the washability of the material is improved.
Preferably, the fineness of the copper-modified antibacterial fiber is 1.0-2.5 dtex, and the length of the copper-modified antibacterial fiber is 25-40 mm; the copper modified antibacterial fiber is made of synthetic fiber.
Preferably, the copper modified antibacterial fiber is made of polyester fiber; the preparation method comprises the following steps: the modified copper particles are melted into polyester spinning melt and then are spun to prepare the copper-based alloy.
Because the copper modified material belongs to an inorganic antibacterial agent, the adhesive force with the fiber is poor. Therefore, the copper modified antibacterial polyester fiber is prepared by blending the copper modified material and the polyester spinning master batch to obtain the blended master batch and then spinning, and the method can effectively solve the problem of poor adhesive force between the copper modified material and the fiber and improve the durability of the antibacterial fiber.
Through the test of an authority, the copper modified polyester fiber has obvious antibacterial effect on staphylococcus aureus, pneumonia bacillus and candida albicans. The antibacterial rate of the antibacterial agent is 99 percent by detecting the antibacterial indexes of staphylococcus aureus, candida albicans, escherichia coli and pneumonia bacillus, and the antibacterial agent reaches the highest AAA standard of the national textile industry. The copper modified polyester fiber has strong and lasting antibacterial, deodorizing, self-cleaning, anti-mite, deodorizing and organism immunity improving functions, and has obvious human body protecting, health care and nursing effects.
Preferably, the holes are rectangular, square, rhombic, round and oval through holes; the size of the hole is 4-25 meshes; the thickness of the washable antibacterial spunlace nonwoven material is 0.2-1.0 mm; the mass per unit area is 40 to 180g/m2。
A preparation method of a washable and bacteriostatic spunlace nonwoven material comprises the following steps:
(1) sending one or more component fibers containing the copper modified antibacterial fiber into a bale opener for preliminary opening and mixing, then sending the mixed fiber into an opener for loosening large entangled fibers into small pieces or bundles by tearing, removing impurities in the fibers,
(2) feeding the fiber into a carding machine through a pipeline, continuously carding the blocky fiber into a bundle shape through card clothing on the carding machine, carding the bundle fiber into single fiber to prepare a fluffy fiber net,
(3) prewetting the fluffy fiber net to remove air in the fluffy fiber net, reducing the thickness of the fiber net, and obtaining a wet fiber net after prewetting; feeding the wet fiber web into a spunlace machine, carrying out a plurality of spunlaces on the fiber web through a template with three-dimensional holes on the surface, so that fibers are entangled and reinforced with each other, and through holes which are arranged in parallel and uniformly distributed are formed on the surface of the material;
(4) removing water from the wet fiber web after the spunlace so as to control the water content of the material to be 50-70%, then performing after-treatment on the material by using a finishing agent, improving the breaking strength of the material, increasing the water washing resistance, reducing the deformation of the material,
(5) and drying, coiling, slitting and packaging the finished material to obtain a finished product.
Preferably, in the step (3), at least two circular drums are adopted for spunlacing in the spunlacing process, the number of spunlacing is six, the pressure of the first spunlacing is 5-45 bar, and the pressure of the second spunlacing is 50-80 bar; the third spunlace pressure is 50-80 bar; the fourth spunlace pressure is 70-130 bar; the pressure of the fifth water-jet is 70-130 bar; the sixth water-jet pressure is 70-130 bar.
The spunlace reinforcement mode mainly comprises two modes of flat screen spunlace reinforcement and round drum spunlace reinforcement, according to the product characteristics of the application, at least two round drums are adopted for spunlace in the scheme, and the reason is that in the round drum spunlace, spunlace heads are arranged along the circumference of the round drums, and fiber webs are adsorbed on the round drums and receive the jet of water jet sprayed by the spunlace heads. The fiber web is curved in a circular arc shape, so that the water-stabbed surface is fluffy, the reverse side is compressed, the penetration of water jet is facilitated, and the fibers are effectively entangled, so that the fiber entanglement efficiency is high, and the material washability is good.
In the hydro-entangling reinforcement, the first to third hydro-entangling processes are carried out on the first round drum to complete hydro-entangling on the front surface of the material, and the fourth to sixth hydro-entangling processes are carried out on the second round drum to complete hydro-entangling on the back surface of the material.
The main function of the first water jet is to prewet the dry fiber web to remove air in the fiber web and reduce the thickness of the fiber web, therefore, the first water jet selects lower water jet pressure; the second and third water punching are the initial entanglement of the fiber web to obtain a certain strength, so that the moderate water punching pressure is adopted to avoid larger impact damage to the copper modified antibacterial fiber.
In the fourth to sixth water stabs, holes arranged in parallel need to be formed on the surface of the material, therefore, in the technical scheme, higher water stabs pressure is adopted, so that the three-dimensional holes on the template are reflected on the material through the impact of high-pressure water flow, and the fibers are intertwined to be reinforced into cloth, thereby improving the washability of the material.
Preferably, in the step (4), moisture in the wet fibers is removed by adopting a vacuum suction mode; the finishing agent comprises the following components: 20-40 wt% of adhesive, 0.1-2 wt% of water absorbent, 2-5 wt% of thickening agent, 0.1-3 wt% of ammonia water and the balance of water.
The wet material after the water jet process adopts a vacuum suction mode to remove the moisture in the material so as to improve the thickness of the material, enhance the stereoscopic impression of holes on the material and improve the usability.
Preferably, between the step (3) and the step (4), the wet fiber web is subjected to printing finishing after being subjected to water jet so as to form a single-color or multi-color pattern on the surface of the material.
Compared with the prior art, the invention has the beneficial effects that:
1. the cloth cover of the washable antibacterial spunlace material is uniformly distributed with the holes arranged in parallel, and compared with plain spunlace materials and common mesh spunlace cloth, the structure increases entanglement and cohesion points among fibers, improves the structural stability of the material, and is beneficial to improving the washability;
2. according to the invention, the copper antibacterial fibers with special-shaped cross sections are adopted, compared with common round cross-section fibers, the friction force among the fibers is increased, the reinforcing effect is better after the fibers are mutually entangled, the breaking strength of the material is favorably improved, and the washability of the material is enhanced;
3. the copper modified antibacterial fiber fully utilizes the characteristic that copper ions have stronger oxidation-reduction property, so that the copper ions penetrate through cell membranes to enter the interior of cells to react with protein groups, the activity of cell synthetases is damaged, the cells lose the ability of division and proliferation and die, and the aims of resisting bacteria and sterilizing are fulfilled.
4. The technical scheme of the invention solves the problems of non-lasting antibacterial property, poor antibacterial effect and human body safety of the existing antibacterial non-woven material.
Drawings
FIG. 1 is a schematic diagram of the appearance structure of the washable and bacteriostatic spunlace material of the invention.
The reference signs are: longitudinal fiber entanglement strips 1, transverse fiber entanglement strips 2 and holes 3.
Detailed Description
The present invention will be further described with reference to the following examples.
General examples
A washable and bacteriostatic spunlace nonwoven material is characterized in that a base material is formed by fibers which are mutually entangled through spunlace processing, and longitudinal fiber entanglement strips arranged in parallel and transverse fiber entanglement strips arranged in parallel are formed after the fibers are entangled; the longitudinal fiber entanglement strips and the transverse fiber entanglement strips are connected at the mutual intersection points to form holes which are arranged in parallel in the longitudinal direction and the transverse direction in a surrounding manner, the holes are uniformly distributed on the base material in a square continuous non-boundary manner, and the holes are rectangular, square, rhombic, circular and oval through holes; the size of the hole is 4-25 meshes; the thickness of the washable antibacterial spunlace nonwoven material is 0.2-1.0 mm; the mass per unit area is 40 to 180g/m2. The fiber comprises at least 20wt% of copper modified antibacterial fiber.
Wherein, the material of the copper modified antibacterial fiber is synthetic fiber. The copper modified antibacterial fiber contains 2-30 wt% of copper fine particles; the average particle diameter of the copper fine particles is not more than 0.5 μm, and the maximum particle diameter is 0.8. mu.m. Preferably, the copper modified antibacterial fiber is made of polyester fiber; the preparation method comprises the following steps: the modified copper particles are melted into polyester spinning melt and then are spun to prepare the copper-based alloy. The copper modified antibacterial fiber is a fiber with a special-shaped section, and the special-shaped section is triangular, Y-shaped or cross-shaped. The fineness is 1.0 to 2.5dtex, and the length is 25 to 40 mm;
a preparation method of a washable and bacteriostatic spunlace nonwoven material comprises the following steps:
(1) sending one or more component fibers containing the copper modified antibacterial fiber into a bale opener for preliminary opening and mixing, then sending the mixed fiber into an opener for loosening large entangled fibers into small pieces or bundles by tearing, removing impurities in the fibers,
(2) feeding the fiber into a carding machine through a pipeline, continuously carding the blocky fiber into a bundle shape through card clothing on the carding machine, carding the bundle fiber into single fiber to prepare a fluffy fiber net,
(3) prewetting the fluffy fiber net to remove air in the fluffy fiber net, reducing the thickness of the fiber net, and obtaining a wet fiber net after prewetting; and (3) feeding the wet fiber web into a spunlace machine, carrying out a plurality of spunlaces on the fiber web through a template with three-dimensional holes on the surface, so that the fibers are mutually entangled and reinforced, and through holes which are arranged in parallel and uniformly distributed are formed on the surface of the material.
Wherein, the spunlace process adopts a circular drum spunlace, the number of the spunlace channels is six, the pressure of the first spunlace is 5-45 bar, and the pressure of the second spunlace is 50-80 bar; the third spunlace pressure is 50-80 bar; the fourth spunlace pressure is 70-130 bar; the pressure of the fifth water-jet is 70-130 bar; the sixth water-jet pressure is 70-130 bar.
(4) Moisture of the wet fiber web subjected to spunlace is removed by adopting a vacuum suction mode, so that the moisture content of the material is controlled to be 50-70%, and then the material is subjected to after-finishing by adopting a finishing agent, so that the breaking strength of the material is improved, the water washing resistance is improved, and the deformation of the material is reduced.
The finishing agent comprises the following components: 20-40 wt% of adhesive, 0.1-2 wt% of water absorbent, 2-5 wt% of thickening agent, 0.1-3 wt% of ammonia water and the balance of water.
(5) Drying, coiling, slitting and packaging the finished material to obtain a finished product.
Optionally, between the step (3) and the step (4), the wet fiber web is subjected to printing finishing after being subjected to water jet so as to form a single-color or multi-color pattern on the surface of the material.
Example 1
The washable and antibacterial spunlace nonwoven material consists of 30 weight percent of copper-modified antibacterial polyester fiber and 70 weight percent of viscose fiber, and the mass per unit area is 64g/m20.44mm in thickness;
as shown in fig. 1, the copper-modified antibacterial polyester fibers are hydroentangled to form parallel longitudinal fiber-entangled strips 1 and parallel transverse fiber-entangled strips 2; the longitudinal fiber entanglement strips 1 and the transverse fiber entanglement strips 2 are connected at the mutual intersection points to form rectangular holes 3 which are arranged in parallel in the longitudinal direction and the transverse direction in a surrounding manner, and the holes 3 are through holes with the specification of 10 meshes and are uniformly distributed on the surface of the material in a square continuous borderless manner.
The copper modified polyester antibacterial fiber contains 30% of copper fine particles, the average particle size of the copper fine particles is less than or equal to 0.5 mu m, and the maximum particle size is 0.8 mu m; the copper modified antibacterial fiber is a cross-shaped cross-section fiber, and the fineness is as follows: 1.56dtex, length: 38 mm.
A preparation method of a washable and bacteriostatic spunlace nonwoven material comprises the following steps:
(1) the method comprises the steps of feeding 30wt% of copper modified polyester fiber and 70 wt% of viscose fiber into a bale opener for preliminary opening and mixing, feeding the mixed fiber into an opener, loosening large entangled fibers into small pieces or bundles by tearing, and removing impurities in the fibers.
(2) The opened and mixed fibers are fed into a carding machine through a pipeline, the blocky fibers are continuously carded into bunches through card clothing on the carding machine, and then the bunched fibers are carded into single fibers to prepare a fluffy fiber net with a certain thickness.
(3) The fluffy fiber web is pre-wetted, then the wet fiber web is sent into a spunlace machine, and the fiber web is subjected to a plurality of spunlaces through a template with three-dimensional holes on the surface, so that the fibers are mutually entangled and reinforced, and the through holes which are arranged in parallel and uniformly distributed are formed on the surface of the material.
(4) The wet material after the spunlace is subjected to vacuum suction to remove certain moisture, the material is subjected to after-treatment by using a finishing agent, and the adhesive is applied to the spunlace material, so that the breaking strength of the material is improved, and the deformation of the material is reduced.
(5) Drying, coiling, slitting and packaging the finished material to obtain 64g/m2The washable antibacterial spunlace material.
In the step (3), the drum is used for carrying out spunlace, the number of spunlace channels is six, and the pressure of the first spunlace channel is 30 bar; the second water punching pressure is 65 bar; the third water punching pressure is 70 bar; the fourth water punching pressure is 95 bar; the fifth water punching pressure is 110 bar; the sixth water punching pressure is 95 bar; the size of the three-dimensional hole on the drum is 10 meshes.
In the step (4), the finishing agent comprises the following components in percentage by mass:
adhesive: 30 percent; water absorbent: 0.2 percent; thickening agent: 4 percent; ammonia water: 3 percent; water: 62.8 percent.
The nano-copper antibacterial spunlace material is subjected to printing and finishing after the spunlace process, and wavy patterns are printed on the surface of the material.
The antibacterial performance test of the product in example 1 is reported as follows:
test report 1:
(1) sample name: washable antibacterial spunlace nonwoven material
(2) Sample specification: 64g/m210 mesh parallel arrangement mesh
(3) The test method comprises the following steps:
evaluation of antibacterial Properties of GB/T20944.3-2008 textiles part 3: oscillation method
(4) Experimental strains:
staphylococcus aureus ATCC6538, Escherichia coli 8099, Candida albicans ATCC10231
(5) And (3) testing results:
remarking: the test control was 100% pure cotton.
(6) And (4) test conclusion:
test report 2:
(1) sample name: washable antibacterial spunlace nonwoven material (after 20 times of washing)
(2) Sample specification: 64g/m210 mesh parallel arrangement mesh
(3) The test method comprises the following steps:
evaluation of antibacterial Properties of GB/T20944.3-2008 textiles part 3: oscillation method
(4) Experimental strains:
staphylococcus aureus ATCC6538, Escherichia coli 8099, Candida albicans ATCC10231
(5) And (3) testing results:
remarking: the test control was 100% pure cotton.
(6) And (4) test conclusion:
according to the test report, the antibacterial performance of the textile is evaluated according to GB/T20944.3-2008, part 3: according to the standard of the oscillation method, a washing-resistant antibacterial spunlace nonwoven material base sample and a sample washed for 20 times are respectively tested, the antibacterial rate indexes of staphylococcus aureus (ATCC6538), escherichia coli (8099) and candida albicans (ATCC10231) all reach the standard requirements, the antibacterial effect is achieved, the antibacterial performance is not reduced by being washed for 20 times, and the antibacterial effect is proved to be lasting.
The product of the invention has a washing resistance comparison test report:
the washing mode is as follows: normal temperature washing of drum washing machine
Rotating speed of the washing machine: 800 revolutions per minute
Water quantity of the washing machine: 40L
Sample size: 35 x 60cm
Washing times: 20 times (twice)
Washing time: 53 min/time
And (3) testing results:
the data show that the washability of the washable antibacterial spunlace nonwoven material meets the standard requirements, and compared with the washability of a common mesh spunlace material, the washability of the washable antibacterial spunlace nonwoven material is remarkably improved, so that the technical scheme of the invention has advancement and practicability.
Example 2 (Cross + Y shape combination)
Example 2 differs from example 1 in that: the copper modified antibacterial fiber is a special-shaped cross section fiber, and the shape of the special-shaped cross section is a combination of 50% of Y shape and 50% of cross shape.
The antibacterial performance test of the product in example 1 is reported as follows:
test report 1:
(1) sample name: washable antibacterial spunlace nonwoven material
(2) Sample specification: 64g/m210 mesh parallel arrangement mesh
(3) The test method comprises the following steps:
evaluation of antibacterial Properties of GB/T20944.3-2008 textiles part 3: oscillation method
(4) Experimental strains:
staphylococcus aureus ATCC6538, Escherichia coli 8099, Candida albicans ATCC10231
(5) And (3) testing results:
test report 2:
(1) sample name: washable antibacterial spunlace nonwoven material (after 20 times of washing)
(2) Sample specification: 64g/m210 mesh parallel arrangement mesh
(3) The test method comprises the following steps:
evaluation of antibacterial Properties of GB/T20944.3-2008 textiles part 3: oscillation method
(4) Experimental strains:
staphylococcus aureus ATCC6538, Escherichia coli 8099, Candida albicans ATCC10231
(5) And (3) testing results:
according to the test report, the antibacterial performance of the textile is evaluated according to GB/T20944.3-2008, part 3: according to the standard of the concussion method, a washing-resistant antibacterial spunlace nonwoven material base sample and a sample washed for 20 times are respectively tested, the antibacterial rate indexes of staphylococcus aureus (ATCC6538), escherichia coli (8099) and candida albicans (ATCC10231) all reach the standard requirements, the antibacterial effect is achieved, the antibacterial performance is not reduced by being affected by washing for 20 times, and the antibacterial effect is proved to be lasting.
The product of the invention has a washing resistance comparison test report:
the washing mode is as follows: normal temperature washing of drum washing machine
Rotating speed of the washing machine: 800 revolutions per minute
Water quantity of the washing machine: 40L
Sample size: 35 x 60em
Washing times are as follows: 20 times (twice)
Washing time: 53 min/time
And (3) testing results:
from the above test report, it can be seen that under the condition of the same product specification, compared with the product of the example 1, which adopts the copper modified fiber with the cross-shaped cross section, the cross-shaped + Y-shaped combined fiber is adopted as the raw material, wherein 64g/m2The washing fastness of the antibacterial spunlace non-woven material is improved by 17.6 percent and 46g/m2The washing fastness of the antibacterial spunlace nonwoven material is improved by 15.8 percent.
COMPARATIVE EXAMPLE 1 (copper modified fiber with circular section)
The difference between comparative example 1 and example 2 indicates that a copper-modified fiber with a circular cross-section is used.
The comparative test report of the washing resistance of the copper modified fiber product with the circular section comprises the following steps:
a washing mode: normal temperature washing of drum washing machine
Rotating speed of the washing machine: 800 revolutions per minute
Water quantity of the washing machine: 40L
Sample size: 35 x 60cm
Washing times are as follows: 20 times (twice)
Washing time: 53 min/time
And (3) testing results:
from the above test report, it can be seen that under the same product specification, compared with the cross-shaped cross-section copper modified fiber product adopted in example 1, the round-section copper modified fiber is adopted as the raw material, wherein 64g/m2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 70.5 percent and 46g/m2The wash fastness of the antibacterial spunlace nonwoven material is reduced by 84.2%.
Compared with the copper modified fiber product with the cross-shaped and Y-shaped cross sections adopted in the embodiment 2: the copper modified fiber with a circular section is adopted as a raw material, wherein the weight of the copper modified fiber is 64g/m2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 107.1 percent and 46g/m2The wash fastness of the antibacterial spunlace nonwoven material is reduced by 118.8%.
Comparative example 2 (copper-modified fiber having a combination of Flat and triangular sections)
Comparative example 2 differs from example 2 in that 50% of the copper-modified fiber with a flat cross-section combined with 50% of the triangular cross-section is used.
The copper modified fiber product adopting the combination of the flat section and the triangular section has a washing resistance comparison test report:
the washing mode is as follows: normal temperature washing of drum washing machine
Rotating speed of the washing machine: 800 revolutions per minute
Water quantity of the washing machine: 40L
Sample size: 35 x 60cm
Washing times are as follows: 20 times (twice)
Washing time: 53 min/time
And (3) testing results:
as can be seen from the above test reports, under the same product specification, the copper-modified fiber having a 50% flat cross section combined with a 50% triangular cross section was used as the raw material, as compared with the copper-modified fiber product having a cross section in example 1, in which 64g/m was used2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 35.3 percent and 46g/m2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 31.6 percent.
Compared with the copper modified fiber product with the cross-shaped and Y-shaped cross sections adopted in the embodiment 2: the copper modified fiber with 50 percent of flat section and 50 percent of triangular section combined is used as a raw material, wherein the weight percentage of the copper modified fiber is 64g/m2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 64.3 percent and 46g/m2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 56.2%.
Comparative example 3 (copper modified fiber with flat section and round hollow combination)
Comparative example 3 differs from example 2 in that 50% of the copper-modified fiber having a flat cross section combined with 50% of the round hollow fiber was used.
The washing resistance of the copper modified fiber product with the combination of the flat section and the round hollow section is compared with a test report:
the washing mode is as follows: normal temperature washing of drum washing machine
Rotating speed of the washing machine: 800 revolutions per minute
Water quantity of the washing machine: 40L
Sample size: 35 x 60cm
Washing times are as follows: 20 times (twice)
Washing time: 53 min/time
And (3) testing results:
from the above test report, it can be seen that under the same product specification, compared with the product of the copper modified fiber with the cross-shaped cross section in example 1, the copper modified fiber with the combination of 50% of the flat cross section and 50% of the round hollow cross section is used as the raw material, wherein 64g/m2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 47.1 percent and 46g/m2The wash fastness of the antibacterial spunlace nonwoven material is reduced by 47.3 percent.
Compared with the copper modified fiber product with the cross-shaped and Y-shaped cross sections adopted in the embodiment 2: the copper modified fiber with 50 percent of flat section and 50 percent of round hollow section combined is adopted as a raw material, wherein the weight of the copper modified fiber is 64g/m2The washing fastness of the antibacterial spunlace nonwoven material is reduced by 78.6 percent and 46g/m2The wash fastness of the antibacterial spunlace nonwoven material is reduced by 75%.
The raw materials and equipment used in the invention are common raw materials and equipment in the field if not specified; the methods used in the present invention are conventional in the art unless otherwise specified.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (4)
1. A washable antibacterial spunlace nonwoven material is characterized in that: the matrix material is formed by mutually entwisting fibers through spunlace processing, and longitudinal fiber entwisted strips which are arranged in parallel and transverse fiber entwisted strips which are arranged in parallel are formed after the fibers are entwisted; the longitudinal fiber entanglement strips and the transverse fiber entanglement strips are connected at mutual intersection points to surround to form holes which are arranged in parallel in the longitudinal direction and the transverse direction, and the holes are uniformly distributed on the base material in a tetragonal continuous non-boundary mode; the fibers comprise at least 20wt% of copper-modified antibacterial fibers; the copper modified antibacterial fiber adopts 40-60% of Y-shaped cross section and 40-60% of cross-shaped cross section to be mixed;
the copper modified antibacterial fiber contains 2-30 wt% of copper fine particles; the average particle size of the copper fine particles is less than or equal to 0.5 mu m, and the maximum particle size is 0.8 mu m; the fineness of the copper modified antibacterial fiber is 1.0-2.5 dtex, and the length of the copper modified antibacterial fiber is 25-40 mm; the copper modified antibacterial fiber is made of synthetic fiber;
the preparation method of the washable antibacterial spunlace nonwoven material comprises the following steps:
(1) sending one or more component fibers containing the copper modified antibacterial fibers into a bale opener for preliminary opening and mixing, then sending the mixed fibers into an opener for loosening large entangled fibers into small pieces or bundles by tearing, and removing impurities in the fibers;
(2) feeding the fibers into a carding machine through a pipeline, continuously carding the blocky fibers into a bundle shape through card clothing on the carding machine, and carding the bundle-shaped fibers into single fibers to prepare a fluffy fiber net;
(3) prewetting the fluffy fiber net to remove air in the fluffy fiber net, reducing the thickness of the fiber net, and obtaining a wet fiber net after prewetting; feeding the wet fiber web into a spunlace machine, carrying out a plurality of spunlaces on the fiber web through a template with three-dimensional holes on the surface, so that fibers are entangled and reinforced with each other, and through holes which are arranged in parallel and uniformly distributed are formed on the surface of the material; at least two circular drums are adopted for spunlacing in the spunlacing process, the number of spunlacing is six, the pressure of the first spunlacing is 5-45 bar, and the pressure of the second spunlacing is 50-80 bar; the third spunlace pressure is 50-80 bar; the fourth spunlace pressure is 70-130 bar; the pressure of the fifth water-jet is 70-130 bar; the sixth step of hydro-entangling is carried out at a pressure of 70-130 bar;
(4) removing water from the wet fiber web subjected to spunlace to control the water content of the material to be 50-70%, and then performing after-finishing on the material by using a finishing agent to improve the breaking strength of the material, increase the water washing resistance and reduce the deformation of the material;
(5) drying, coiling, slitting and packaging the finished material to obtain a finished product.
2. The washable, bacteriostatic, spunlaced nonwoven material of claim 1, wherein said cavities are rectangular, square, diamond-shaped, circular, oval through-holes; the size of the hole is 4-25 meshes; the thickness of the washable antibacterial spunlace nonwoven material is 0.2-1.0 mm; the mass per unit area is 40-180 g/square meter.
3. The washably scourable and bacteriostatic spunlaced nonwoven material of claim 1, wherein in step (4), moisture is removed from the wet fibers by vacuum suction; the finishing agent comprises the following components: 20-40 wt% of adhesive, 0.1-2 wt% of water absorbent, 2-5 wt% of thickening agent, 0.1-3 wt% of ammonia water and the balance of water.
4. The washably washable and bacteriostatic spunlaced nonwoven material of claim 1, wherein between step (3) and step (4), the wet web is further subjected to a printing finish after being subjected to spunlace so as to form a single-color or multi-color pattern on the surface of the material.
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| CN111394889B (en) * | 2019-12-26 | 2021-10-15 | 杭州诺邦无纺股份有限公司 | Degradable spunlace nonwoven material for nursing and preparation method |
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| WO2015000685A1 (en) * | 2013-07-04 | 2015-01-08 | Voith Patent Gmbh | Method and apparatus for producing nonwoven material |
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