CN102454046B - Method for manufacturing high-strength needling nonwoven geotextiles - Google Patents
Method for manufacturing high-strength needling nonwoven geotextiles Download PDFInfo
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- CN102454046B CN102454046B CN201010517659.6A CN201010517659A CN102454046B CN 102454046 B CN102454046 B CN 102454046B CN 201010517659 A CN201010517659 A CN 201010517659A CN 102454046 B CN102454046 B CN 102454046B
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Abstract
The invention discloses a method for manufacturing high-strength needling nonwoven geotextiles. The method comprises the steps of loosening fibers, blending the fibers, carding the fibers into a mesh, spreading the mesh, needling the mesh, carrying out heat setting on the needled mesh and winding the finished product. According to the invention, a heat setting procedure is additionally increased in the traditional process for manufacturing staple fiber needling nonwoven geotextiles; residual stresses, which are accumulated within the fibers and the geotextiles and generated in the procedures of loosening the fibers, blending the fibers, carding the fibers into the mesh, spreading the mesh as well as needling and solidifying the mesh, are eliminated through heat setting treatment so that the knot strength between the fibers is enhanced and the physical mechanical performance of the geotextile is improved and enhanced; and simple and practical process is obtained.
Description
Technical field
The invention belongs to field of textiles, relate to a kind of method of manufacturing high-strength needling nonwoven geotextiles.
Background technology
Geotextiles is the textiles being applied in civil engineering.What geotextiles mainly adopted at the application initial stage is woven and braiding class geotextiles.Development along with nonwoven techniques, structure and good characteristic due to non-weaving cloth uniqueness, therefore at engineering field, developed rapidly and applied, the non-woven geotextile that the staple fibre needle fabric of wherein take is main body is current geotextiles principal item, and this series products is one of most widely used non-woven geotextile.Compare with braiding class geotextiles with woven, non-woven geotextile production efficiency is higher, and price is more cheap, functional, is particularly easily processed into wide cut goods, and therefore development is swift and violent.The production technology that at present staple fibre needling non-woven geotextiles the adopts direct formation finished product that is fiber after shredding mixing, combing (or air-flow) one-tenth net, lapping, acupuncture are fixed, be characterized in that thickness is large, density is high, structure is fluffy, water suction and water permeability are good, and it is convenient to lay.But the staple fibre needling non-woven geotextiles that prior art is produced also ubiquity ability of anti-deformation is poor, yielding, powerful on the low side, make to be difficult in using to play the shortcoming of the effect of enhancing.
Summary of the invention
the object of the invention is tofor the deficiencies in the prior art, a kind of method of manufacturing high-strength needling nonwoven geotextiles is provided, with the method, can improve the intensity of staple fibre needling non-woven geotextiles.
object of the present invention can be achieved through the following technical solutions:
A method of manufacturing high-strength needling nonwoven geotextiles, the method comprises the following steps: fiber opening mixing, carding, lapping, acupuncture, HEAT SETTING and finished product are reeled.
The method of above-mentioned manufacture high-strength needling nonwoven geotextiles, the temperature of HEAT SETTING is controlled at lower than 10 ℃-30 ℃ of fiber fusing points.
The method of above-mentioned manufacture high-strength needling nonwoven geotextiles, the mode of the HEAT SETTING described in it is outer infrared sizing or hot air shaping, is preferably hot air shaping.
The method of above-mentioned manufacture high-strength needling nonwoven geotextiles, the staple fibre described in it is terylene or polypropylene short fiber.
beneficial effect of the present invention:
By HEAT SETTING, process and eliminate the residual stress that accumulate in fiber and geotextiles inside of fiber through producing in shredding mixing, combing (or air-flow) one-tenth net, lapping, the fixed operation of acupuncture, improve the interfibrous intensity of colluding with, improve its physical and mechanical properties, thereby improve DIMENSIONAL STABILITY and the mechanical strength (TENSILE STRENGTH, TEAR STRENGTH, bursting strength) of geotextiles integral body.Technique is simple, practical.
Accompanying drawing explanation
Fig. 1 is the roller frame schematic diagram that setting machine hot blast of the present invention penetrates.
Wherein: 1-cylinder; 2-hole; 3-air exhauster.
The specific embodiment
embodiment 1
1, technological process
Fiber opening mixing → combing (or air-flow) becomes net → lapping → acupuncture → HEAT SETTING → finished product to reel.
Fiber opening mixes: fibrous raw material is loosened, make large fiber block, fibrous mass dissociation, fiber is obtained uniformly and mix;
Carding: the mixed ready little flock of shredding is carded to the thin net that filament forms by carding machine;
Lapping: the thin fibre web by carding machine is carded to is from level to level carried out to laying to increase surface density and the thickness of nonwoven product by lapping machine;
Acupuncture: by the needing machine of pricker is housed, fibre web is punctured repeatedly, make the fiber needle-punched non-woven that forms entangled to each other in fibre web;
HEAT SETTING: HEAT SETTING mode adopts hot air shaping, by heat setting machine, non-weaving cloth is heat-treated; HEAT SETTING process completes on setting machine.The cylinder that setting machine penetrates with hot blast, the structure of cylinder is shown in Fig. 1, cylinder 1 is hollow-core construction, one end is with air exhauster 3, and cylinder 1 surface, with equally distributed hole 2, makes hot blast enter cylinder inside by hole 2, under the effect of air exhauster 3, make hot blast in hole 2 with the inner circulative convection that forms of cylinder; Non-weaving cloth around cylinder operation, penetrates and is issued to sizing object at hot blast under deflector roll guiding.At the edge of cylinder, pin band or cloth clamp are housed, operating selvedge is fixed on pin band or cloth clamp, prevent the irregular contraction of non-weaving cloth fabric width.The general selection principle of heating-up temperature of hot air shaping is lower than 10～30 ℃ of fiber fusing points.Existing geotextiles is generally used terylene (PET) or polypropylene fibre (PP) staple fibre, terylene (PET) (fusing point 255-265 ℃) staple fibre geotextiles heat setting temperature and time are 230～250 ℃, 30～120S, and polypropylene fibre (PP) (fusing point 160-175 ℃) staple fibre geotextiles heat setting temperature and time are 130～150 ℃, 30～120S.
Finished product is reeled: the acupuncture geotextiles that HEAT SETTING is completed completes coiling by coiler device.
2, description of the process
Because the present invention increases heat-setting process existing production on staple fibre needling non-woven geotextiles technique basis, therefore, only with regard to heat setting process, be illustrated here.
HEAT SETTING is that the fiber web in the situation that not adding any low melting point viscose fibre, a kind of fiber being formed is made geotextiles.HEAT SETTING is exactly under uniform temperature and time conditions, to improve the brute force of non-weaving cloth and a process of DIMENSIONAL STABILITY, in HEAT SETTING process, change due to fiber supramolecular structure and morphosis, unsettled construction unit is changed into compared with stable structure unit, make non-weaving cloth obtain certain form, and eliminate fibroreticulate internal stress.
Fiber web is in production and process, and fiber is subject to various External Force Actings and is tightened up, and tension degree is either large or small.Therefore, there is potential internal stress in fiber web, and only having provides enough heat energy that it can be moved freely to fiber could to eliminate internal stress.Therefore, the selection of heat setting temperature is particularly important, and fibroreticulate setting temperature scope is according to the difference of kinds of fibers and difference.General selection principle is lower than 10～30 ℃ of fiber fusing points.Certainly HEAT SETTING effect not only depends on setting temperature, also depends on shaping time; Shaping time is relevant with sizing mode again, also relevant with fiber web weight per unit area, and the large needed shaping time of weight per unit area is also long.
Table 1: HEAT SETTING experiment effect (raw material: terylene, surface density: 300 g/m
2)
By table 1 experimental result is provable, in the technological process of manufacturing needles non-woven geotextiles, increase DIMENSIONAL STABILITY and the mechanical strength that HEAT SETTING step can improve geotextiles integral body.
Claims (1)
1. manufacture a method for high-strength needling nonwoven geotextiles, it is characterized in that the method comprises the following steps: fiber opening, mixing, carding, lapping, acupuncture, HEAT SETTING and finished product are reeled; The temperature of HEAT SETTING is controlled at lower than 10 ℃-30 ℃ of fiber fusing points; Described HEAT SETTING mode is hot air shaping; Described fiber is terylene or polypropylene short fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010517659.6A CN102454046B (en) | 2010-10-25 | 2010-10-25 | Method for manufacturing high-strength needling nonwoven geotextiles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010517659.6A CN102454046B (en) | 2010-10-25 | 2010-10-25 | Method for manufacturing high-strength needling nonwoven geotextiles |
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| Publication Number | Publication Date |
|---|---|
| CN102454046A CN102454046A (en) | 2012-05-16 |
| CN102454046B true CN102454046B (en) | 2014-04-02 |
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| CN201010517659.6A Expired - Fee Related CN102454046B (en) | 2010-10-25 | 2010-10-25 | Method for manufacturing high-strength needling nonwoven geotextiles |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103074739B (en) * | 2013-01-29 | 2015-06-03 | 大连华阳化纤科技有限公司 | Production method for polypropylene spun-bonded needle-punched geotextile |
| CN103361882B (en) * | 2013-05-29 | 2016-03-09 | 仪征易力土工合成材料有限公司 | A kind of chopped fiber needle-punched geotextiles production technology |
| CN103243482A (en) * | 2013-05-30 | 2013-08-14 | 山东爱地高分子材料有限公司 | High-strength non-woven fabric |
| CN105398149B (en) * | 2015-11-17 | 2016-12-21 | 华北水利水电大学 | Sodium-based bentonite waterproof carpet and preparation method thereof |
| CN105506897B (en) * | 2015-11-27 | 2018-11-23 | 东阳市启创知识产权运营有限公司 | A kind of method of metallurgy filter cloth oil thermal finalization processing |
| CN107401155A (en) * | 2016-12-06 | 2017-11-28 | 青海富腾生态科技有限公司 | The improved process and base fabric cracking resistance experimental provision of a kind of waterproof anticracking base fabric |
| CN108978030A (en) * | 2017-06-01 | 2018-12-11 | 无锡市振基土工材料有限公司 | A kind of production technology of degradable geotextile |
| CN109267236A (en) * | 2017-07-17 | 2019-01-25 | 无锡市振基土工材料有限公司 | A kind of acupuncture nonwoven geotextiles and preparation method thereof |
| CN107700072A (en) * | 2017-10-24 | 2018-02-16 | 武汉纺织大学 | A kind of negative pressure needle-punching method of aramid fiber/glass mat |
| CN109811419B (en) * | 2019-01-31 | 2021-09-03 | 天鼎丰聚丙烯材料技术有限公司 | Waterproof and anti-cracking base cloth and manufacturing method thereof |
| CN111058191B (en) * | 2019-12-25 | 2022-04-01 | 山东省金业土工材料有限公司 | High-strength short fiber needle-punched geotextile and preparation method thereof |
| CN112853624B (en) * | 2020-12-30 | 2022-12-06 | 天鼎丰聚丙烯材料技术有限公司 | Special polypropylene filament needle-punched drainage geotextile for tunnel, preparation method and preparation system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804179A (en) * | 2005-11-23 | 2006-07-19 | 周永斌 | Special nonwoven fabric and its production process |
| CN101307528A (en) * | 2008-02-29 | 2008-11-19 | 东莞市莲盈棉制品有限公司 | Fire retardant cotton nonwoven fabrics and manufacture method thereof |
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- 2010-10-25 CN CN201010517659.6A patent/CN102454046B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804179A (en) * | 2005-11-23 | 2006-07-19 | 周永斌 | Special nonwoven fabric and its production process |
| CN101307528A (en) * | 2008-02-29 | 2008-11-19 | 东莞市莲盈棉制品有限公司 | Fire retardant cotton nonwoven fabrics and manufacture method thereof |
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| CN102454046A (en) | 2012-05-16 |
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