CN109505060A - A kind of production technology of antibacterial bacteriostatic nonwoven fabric - Google Patents
A kind of production technology of antibacterial bacteriostatic nonwoven fabric Download PDFInfo
- Publication number
- CN109505060A CN109505060A CN201811257888.1A CN201811257888A CN109505060A CN 109505060 A CN109505060 A CN 109505060A CN 201811257888 A CN201811257888 A CN 201811257888A CN 109505060 A CN109505060 A CN 109505060A
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- CN
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- Prior art keywords
- nonwoven fabric
- antibacterial bacteriostatic
- area
- raw material
- master batch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/40—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties
- D04H1/42—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties characterised by the use of certain kinds of fibres insofar as this use has no preponderant influence on the consolidation of the fleece
- D04H1/4382—Stretched reticular film fibres; Composite fibres; Mixed fibres; Ultrafine fibres; Fibres for artificial leather
-
- 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
- D04H1/54—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres from fleeces or layers composed of fibres without existing or potential cohesive properties by welding together the fibres, e.g. by partially melting or dissolving
- D04H1/541—Composite fibres, e.g. sheath-core, sea-island or side-by-side; Mixed fibres
-
- 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
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/02—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins
- D10B2321/022—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polyolefins polypropylene
-
- 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
- D10B2401/00—Physical properties
- D10B2401/13—Physical properties anti-allergenic or anti-bacterial
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Artificial Filaments (AREA)
Abstract
The invention discloses a kind of production technologies of antibacterial bacteriostatic nonwoven fabric, the following steps are included: a variety of raw material are mixed according to the ratio, 46%-49% is added including acrylic resin H5380-1, acrylic resin V30G adds 46%-48%, and water-soluble zinc antibacterial bacteriostatic master batch adds 5%-8%；Set six Qu Wendu and other parameters of nonwoven fabric production equipment；Mixed uniformly raw material are put into nonwoven fabric production equipment and are produced, antibacterial bacteriostatic nonwoven fabric is obtained.Pass through above-mentioned technique, the melting means value for mixing matched antibacterial bacteriostatic master batch and mother particles of polypropylene resin according to the ratio reaches between 28-30, good fluidity, uniformly and effectively antibacterial bacteriostatic nonwoven fabric can be produced under the setting condition of the above device parameter, overcome the technical problem of the water-soluble combination of zinc antibacterial bacteriostatic master batch and polypropylene numerical value mixture manufacturing nonwoven fabric in the industry, the mobility of mixing material, avoids the injury device that gets stuck in ensuring to produce, and reduces production cost and risk.
Description
Technical field
The present invention relates to anti-biotic material fields, particularly relate to a kind of production technology of antibacterial bacteriostatic nonwoven fabric.
Background technique
Mask is a kind of amenities, is generally made of gauze, is worn over nose and mouth and is used to filter the air for entering mouth and nose,
To the gas of blocking harmful, smell, droplet and dust particles etc..Mask has certain filtering to make the air for entering lung
With in the environment of the pollutions such as dust when operation, wearing masks with extraordinary effect in respiratory infectious disease prevalence.
Nonwoven fabric is a kind of fabric for not needing spinning and weaving and being formed, and is only determined textile staple or long filament
To or random alignment, form fibre net structure, then reinforced using the methods of mechanical, hot sticky or chemical.It is directly using high
Polymers slice, staple fiber or long filament have soft, ventilative and plane by what various web forming methods and concretion technology were formed
The tencel product of structure.
Existing mask is all to coat anti-biotic material on the surface layer of gauze, since anti-biotic material is the table for being attached to gauze
There is the case where disengaging, fall off in face, anti-microbial property is not lasting.It is existing non-by the production of antibacterial bacteriostatic material mixing other materials
Woven fabric makes mixing material inherently have antibacterial bacteriostatic performance, but is difficult to realize in actual production, due to the proportion of each component
The dispersibility and mobility that will affect mixed solution entirety, matching inaccuracy at the process mixed solution of nonwoven fabric in manufacture will
Lead to not spray uniform antibacterial bacteriostatic fiber, can not survive qualified antibacterial bacteriostatic nonwoven fabric, can even damage when serious
Equipment, since the equipment of production nonwoven fabric is more expensive, for squeezing the die head aperture very little of wire vent, mixed solution poor fluidity
Shi Rongyi plug, causes die head to damage, and production risk increases, and production cost is higher.
In view of this, the present inventor regarding to the issue above caused by many missings and inconvenience, and deeply conceive, and actively
Research improvement has a fling at and develops and design the present invention.
Summary of the invention
The purpose of the present invention is to provide a kind of production technology of antibacterial bacteriostatic nonwoven fabric, mixed in raising production process molten
The mobility of liquid so as to produce uniform antibacterial bacteriostatic nonwoven fabric, and can avoid damage to equipment, reduce production wind
Danger and cost.
In order to achieve the above objectives, solution of the invention is:
A kind of production technology of antibacterial bacteriostatic nonwoven fabric, comprising the following steps:
S1 adds a variety of raw material in proportion in mixing dispensing machine, is divided with 80 turns of speed per minute at the uniform velocity stir about 20
Clock time mixes it uniformly, and above-mentioned raw material include acrylic resin between acrylic resin H5380-1 addition 46%-49%
V30G is added between 46%-48%, between water-soluble zinc antibacterial bacteriostatic master batch addition 5%-8%；
S2 sets six Qu Wendu and other parameters of nonwoven fabric production equipment, wherein setting big extruder temperature as an area 185
DEG C, the range in 190 DEG C of 2nd area, 195 DEG C of 3rd area, 205 DEG C of 4th area, 212 DEG C of 5th area, 220 DEG C of 6th area, set heat embroider roll temperature as
The range of 143 DEG C of upper roller, 146 DEG C of lower roll, wind speed setting are the range of cold wind 680r/min, suction air 550r/min；
Mixed uniformly raw material are put into nonwoven fabric production equipment and are produced, obtain antibacterial bacteriostatic nonwoven fabric by S3；
S4 confirms the parameters and data demand of antibacterial bacteriostatic nonwoven fabric；
The wide cut of antibacterial bacteriostatic nonwoven fabric as required is wound cutting, does waterproofing packing after meter length, the mark that weighs by S5.
By above-mentioned technique, the melting means value for mixing matched antibacterial bacteriostatic master batch and mother particles of polypropylene resin according to the ratio reaches
Between 28-30, good fluidity can produce that uniformly and effectively antibacterial bacteriostatic is non-knits under the setting condition of the above device parameter
Cloth overcomes the technical problem of the water-soluble combination of zinc antibacterial bacteriostatic master batch and polypropylene numerical value mixture manufacturing nonwoven fabric in the industry, really
Protect production process in mixing material solution mobility, avoid the injury device mesh belt main part that gets stuck, thus reduce production cost and
Risk.
Specific embodiment
In order to further explain the technical solution of the present invention, being explained in detail below by specific embodiment the present invention
It states.
A kind of antibacterial bacteriostatic nonwoven fabric formula, component and proportion are as follows:
Acrylic resin H5380-1,46%-49%；
Acrylic resin V30G, 46%-48%；
Water-soluble zinc antibacterial bacteriostatic master batch, 5%-8%.
The melting means value of above-mentioned acrylic resin H5380-1 is 38, and the melting means value of acrylic resin V30G is 22, with water solubility
Zinc antibacterial bacteriostatic master batch is reached between 28-30 by melting means value after said ratio mixing matching, good fluidity.
Above-mentioned each component can all influence whole dispersibility and mobility beyond ratio range, in manufacture at the mistake of nonwoven fabric
Cheng Wufa sprays uniform antibacterial bacteriostatic fiber, can not produce uniform antibacterial bacteriostatic nonwoven fabric, will injury device when serious
Mesh belt main part, causes production cost to increase.
By said ratio, molten value compatibility and mobility between adjustable each component allow water-soluble zinc antibacterial to press down
Bacterium molecule smooth can equably fuse in acrylic resin, obtain the mixed solution of good fluidity；Said ratio can protect
The mobility and smoothness for demonstrate,proving the mixing material of production process, avoid damage to equipment, to reduce production cost.
Above-mentioned antibacterial bacteriostatic nonwoven fabric formula can be used for a kind of production technology of antibacterial bacteriostatic nonwoven fabric below, including with
Lower step:
S1 adds a variety of raw material in proportion in mixing dispensing machine, is divided with 80 turns of speed per minute at the uniform velocity stir about 20
Clock time mixes it uniformly, and above-mentioned raw material include acrylic resin between acrylic resin H5380-1 addition 46%-49%
V30G is added between 46%-48%, between water-soluble zinc antibacterial bacteriostatic master batch addition 5%-8%；
S2 sets six Qu Wendu and other parameters of nonwoven fabric production equipment, wherein setting big extruder temperature as an area 185
DEG C, the range in 190 DEG C of 2nd area, 195 DEG C of 3rd area, 205 DEG C of 4th area, 212 DEG C of 5th area, 220 DEG C of 6th area, set heat embroider roll temperature as
The range of 143 DEG C of upper roller, 146 DEG C of lower roll, wind speed setting are the range of cold wind 680r/min, suction air 550r/min；
Mixed uniformly raw material are put into nonwoven fabric production equipment and are produced, obtain antibacterial bacteriostatic nonwoven fabric by S3；
S4 confirms the parameters and data demand of antibacterial bacteriostatic nonwoven fabric；
The wide cut of antibacterial bacteriostatic nonwoven fabric as required is wound cutting, does waterproofing packing after meter length, the mark that weighs by S5.
The technical issues of now in industry can not temporarily solving water-soluble zinc antibacterial bacteriostatic combination master batch mixture manufacturing nonwoven fabric,
It matches the improper melting means value that will lead to mixed solution and mobility is deteriorated, get stuck in the process for squeezing wire vent, or even can damage and set
It is standby, lead to production risk and increased costs.
Above-mentioned 6th area temperature is set as gradually being incremented by, and so that mixed solution is slowly heated up, mobility is gradually increased.If one
Secondary property heating, it will cause to generate bubble in mixed solution, influence the smoothness of flowing, fracture of wire is caused even to block die head.On
The error range for stating six area's temperature can be ± 1-2 degrees Celsius.
The above-mentioned melting means value for mixing matched antibacterial bacteriostatic master batch and mother particles of polypropylene resin according to the ratio reach 28-30 it
Between, good fluidity can produce uniformly and effectively antibacterial bacteriostatic nonwoven fabric under the setting condition of the above device parameter, overcome
The technical problem of the water-soluble combination of zinc antibacterial bacteriostatic master batch and polypropylene numerical value mixture manufacturing nonwoven fabric in the industry, it is ensured that produced
The mobility of mixed solution in journey avoids the injury device mesh belt main part that gets stuck, to reduce production cost and risk.
Above-described embodiment and non-limiting product form and style of the invention, the ordinary skill people of any technical field
The appropriate changes or modifications that member does it, all should be regarded as not departing from patent category of the invention.
Claims (1)
1. a kind of production technology of antibacterial bacteriostatic nonwoven fabric, it is characterised in that the following steps are included:
S1 adds a variety of raw material in proportion in mixing dispensing machine, is divided with 80 turns of speed per minute at the uniform velocity stir about 20
Clock time mixes it uniformly, and above-mentioned raw material include acrylic resin between acrylic resin H5380-1 addition 46%-49%
V30G is added between 46%-48%, between water-soluble zinc antibacterial bacteriostatic master batch addition 5%-8%；
S2 sets six Qu Wendu and other parameters of nonwoven fabric production equipment, wherein setting big extruder temperature as an area 185
DEG C, the range in 190 DEG C of 2nd area, 195 DEG C of 3rd area, 205 DEG C of 4th area, 212 DEG C of 5th area, 220 DEG C of 6th area, set heat embroider roll temperature as
The range of 143 DEG C of upper roller, 146 DEG C of lower roll, wind speed setting are the range of cold wind 680m/sr/min, suction air 550mr/min；
Mixed uniformly raw material are put into nonwoven fabric production equipment and are produced, obtain antibacterial bacteriostatic nonwoven fabric by S3；
S4 confirms the parameters and data demand of antibacterial bacteriostatic nonwoven fabric；
The wide cut of antibacterial bacteriostatic nonwoven fabric as required is wound cutting, does waterproofing packing after meter length, the mark that weighs by S5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257888.1A CN109505060A (en) | 2018-10-26 | 2018-10-26 | A kind of production technology of antibacterial bacteriostatic nonwoven fabric |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811257888.1A CN109505060A (en) | 2018-10-26 | 2018-10-26 | A kind of production technology of antibacterial bacteriostatic nonwoven fabric |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109505060A true CN109505060A (en) | 2019-03-22 |
Family
ID=65746865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811257888.1A Withdrawn CN109505060A (en) | 2018-10-26 | 2018-10-26 | A kind of production technology of antibacterial bacteriostatic nonwoven fabric |
Country Status (1)
| Country | Link |
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| CN (1) | CN109505060A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281313A (en) * | 2020-10-15 | 2021-01-29 | 青岛大学 | High-elasticity recovery spun-bonded non-woven fabric and preparation method thereof |
| CN112281301A (en) * | 2020-10-15 | 2021-01-29 | 青岛大学 | High-elasticity recovery melt-blown non-woven fabric and preparation method thereof |
| CN114687067A (en) * | 2022-04-18 | 2022-07-01 | 萍乡小日科技有限公司 | Production process of antibacterial and bacteriostatic non-woven fabric |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560725A (en) * | 2010-12-31 | 2012-07-11 | 上海德福伦化纤有限公司 | Production method of inorganic nanometer zinc oxide multifunctional composite antibacterial polyester fiber |
| CN106192213A (en) * | 2016-08-15 | 2016-12-07 | 东莞市悠悠美居家居制造有限公司 | A kind of flexible nonwoven cloth and preparation method thereof |
| CN106750990A (en) * | 2016-12-12 | 2017-05-31 | 广东威林工程塑料股份有限公司 | A kind of food medical grade heat-resisting high-transparency antibacterial polypropylene material high and preparation method thereof |
| WO2017132729A1 (en) * | 2016-02-02 | 2017-08-10 | Thermasorb Pty Ltd | Longlife packaging |
| CN108395679A (en) * | 2017-09-22 | 2018-08-14 | 浙江中迪纺织新材料科技有限公司 | A kind of high molecular polymer antibacterial plastic concentrate and preparation method thereof based on one-D nano zinc oxide |
| CN108532305A (en) * | 2018-04-04 | 2018-09-14 | 苏州市苏宁床垫有限公司 | A kind of nano-antibacterial non-woven fabrics |
-
2018
- 2018-10-26 CN CN201811257888.1A patent/CN109505060A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102560725A (en) * | 2010-12-31 | 2012-07-11 | 上海德福伦化纤有限公司 | Production method of inorganic nanometer zinc oxide multifunctional composite antibacterial polyester fiber |
| WO2017132729A1 (en) * | 2016-02-02 | 2017-08-10 | Thermasorb Pty Ltd | Longlife packaging |
| CN106192213A (en) * | 2016-08-15 | 2016-12-07 | 东莞市悠悠美居家居制造有限公司 | A kind of flexible nonwoven cloth and preparation method thereof |
| CN106750990A (en) * | 2016-12-12 | 2017-05-31 | 广东威林工程塑料股份有限公司 | A kind of food medical grade heat-resisting high-transparency antibacterial polypropylene material high and preparation method thereof |
| CN108395679A (en) * | 2017-09-22 | 2018-08-14 | 浙江中迪纺织新材料科技有限公司 | A kind of high molecular polymer antibacterial plastic concentrate and preparation method thereof based on one-D nano zinc oxide |
| CN108532305A (en) * | 2018-04-04 | 2018-09-14 | 苏州市苏宁床垫有限公司 | A kind of nano-antibacterial non-woven fabrics |
Non-Patent Citations (1)
| Title |
|---|
| 朱伟等: "纤维专用高流动性高等规指数低气味PP的开发", 《合成树脂及塑料》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112281313A (en) * | 2020-10-15 | 2021-01-29 | 青岛大学 | High-elasticity recovery spun-bonded non-woven fabric and preparation method thereof |
| CN112281301A (en) * | 2020-10-15 | 2021-01-29 | 青岛大学 | High-elasticity recovery melt-blown non-woven fabric and preparation method thereof |
| CN114687067A (en) * | 2022-04-18 | 2022-07-01 | 萍乡小日科技有限公司 | Production process of antibacterial and bacteriostatic non-woven fabric |
| WO2023202720A1 (en) * | 2022-04-18 | 2023-10-26 | 萍乡小日科技有限公司 | Production process for antibacterial and bacteriostatic non-woven fabric |
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| PB01 | Publication | ||
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Application publication date: 20190322 |