CN101411885A - Novel technique for dewatering and rinsing medical dressing by one-bath method - Google Patents
Novel technique for dewatering and rinsing medical dressing by one-bath method Download PDFInfo
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- CN101411885A CN101411885A CNA2007101562307A CN200710156230A CN101411885A CN 101411885 A CN101411885 A CN 101411885A CN A2007101562307 A CNA2007101562307 A CN A2007101562307A CN 200710156230 A CN200710156230 A CN 200710156230A CN 101411885 A CN101411885 A CN 101411885A
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Abstract
The invention discloses a new bath bleaching technique for medical dressing, which comprises two steps, namely prewashing and bleaching, wherein the prewashing step is as follows: adding 0.5 to 1 weight percent of cleaning bleacher and 0.1 to 0.5 weight percent of refining agent of the dressing, prewashing the dressing from 10 to 40 minutes in a reaction kettle at a temperature range of between 30 and 90 DEG C, discharging liquid, then pressurizing and rinsing or rinsing the dressing by liquid flow in the reaction kettle for 10 to 25 minutes, and discharging liquid; and after prewashing the dressing, adding bleacher containing sodium hydroxide and oxydol in the reaction kettle, and bleaching the dressing. The technique effectively solves the problems that the prior bleaching technique consumes much time and much energy and produces much sewage, the product becomes yellow and crisp easily, and the like. By adopting the technique, the total cost reduces greatly; and the technique has favorable economic benefit and social benefit.
Description
Technical field
The present invention relates to defat and bleaching processing technology field, especially a kind of production efficiency height, the novel technique for dewatering and rinsing medical dressing by one-bath that energy consumption is low, blowdown is few to fabric, fiber.
Background technology
The principle that medical dressing industry cellulose fibre tradition is taken off bleaching process is that elder generation refuses water substance with fat one class that sodium hydroxide removes spontaneous growth cotton fiber surface, make cellulose fibre reach medical fibre cellulose fiber suction standard (≤10 seconds sedimentation velocity), and then with oxidizing substance (H
2O
2, NaClO) remove pigment, make the whiteness of cotton cellulose fiber reach medical pharmacopeia whiteness require (〉=80Pate).Traditional handicraft is longer process time, to pass through the high alkaline scouring defat of high temperature earlier, and then pigment is removed in bleaching, be that so-called two one-bath two-step process take off bleaching process, this technology has many, big energy-consuming consuming time, shortcoming that sewage is many, simultaneously, it is tighter that technology controlling and process requires, and product easily produces jaundice, quality problems such as become fragile.The day for announcing is that the Granted publication CN 1718904A on January 11st, 2006 discloses a kind of medical absorbent cotton/gauze alkaline oxygen bath technology, adopted hot water wash-boil to float-process of hot water wash-neutrality washing, shortened technological process.
Summary of the invention
The present invention reaches for solving existing bleaching process many, the big energy-consuming consuming time, sewage of taking off that product easily produces jaundice, problem such as become fragile provides a kind of production efficiency height, energy consumption is low, blowdown is few and the novel technique for dewatering and rinsing medical dressing by one-bath of good product quality more.
The present invention reaches the concrete technical scheme that above-mentioned technical purpose adopts to be: the dressing single bath process takes off and floats new technology, comprises following steps:
A. prewashing: adding dressing weight ratio is 0.5%-1% clean that white (CCW), 0.1%-0.5% scouring agent (K400), with dressing prewashing 10-40 minutes in temperature is 30-90 degree scopes in reactor, discharge opeing, again dressing is pressurizeed in reactor washing or liquid flow water wash 10-25 minutes, discharge opeing;
B. float and take off: in reactor, add and contain sodium hydroxide (NaOH), hydrogen peroxide (H
2O
2) float and take off agent, after reactor is warming up to 95-120 degree, keeps after 40-60 minutes dressing being carried out hot water pressurization washing 20-40 minutes, in the laggard capable acid of hot water pressurization washing with 10-30 minutes.
It is the metal ion that hydrogen peroxide effectively decomposes that is unfavorable for that uses earlier in organic complexing agent+dispersant removal cotton fiber spontaneous growth process that the dressing single bath process takes off the principle of floating new technology, the effect of cracking (degraded) natural macromolecular of fair branch performance strong oxidizer hydrogen peroxide makes macromole become micromolecule, the micromolecule micro dissolution, be scattered in the water, and then the abutment surface activating agent washs in water it fully, thereby defat and bleaching one-bath are finished.In the prewashing step, use the clean that white (CCW) of containing metal chelating agent and dispersant, can make dressing have excellent whiteness and uniform capillary effect.Scouring agent (K400) has following characteristics: the one, and good permeability all has splendid permeability in neutrality, acidity and strong basicity, clean your white material can be contacted by abundant impurity on fiber.The 2nd, good emulsibility, can the emulsifying cloth cover natural waxiness in braiding greasy dirt and the cellulose fibre.The 3rd, good dispersibility, dirt is stained with again in the time of can preventing to scouring and bleaching like this.The 4th, good washing performance reaches easily washing property.The setting of discharge opeing operation has strengthened clean result greatly in discharge opeing in the prewashing process---pressurization washing---.Adopt the dressing single bath process to take off and float new technology, under the prerequisite that product quality improves, shortened the process time, saved single degreasing process, take off to float and unite two into one, steam, the electricity charge can save 20%-40%, and production efficiency improves 20%-30%, sewage discharge simultaneously reduces 30%-40%, and overall cost declines to a great extent.
As preferably, the prescription of pre-washing agent is in the prewashing step: clean your white (CCW) 0.65%-85%, scouring agent (K400) 0.2%-0.4%.
As preferably, use the chemical substance that contains complexation, chelating and peptizaiton to extract the impurity metal ion that is unfavorable for decomposing hydrogen dioxide solution in natural fiber growth and the braiding process in technical process.
As preferably, be provided with the discharge opeing operation one after the use extraction chemistry extracting substances in the prewashing step, add one pressurization washing or 10-15 minutes operations of liquid flow water wash after the discharge opeing operation again, discharge opeing.
The prewashing step is arranged on takes off before the bleaching-bathing technology.The prewashing step was set before taking off bleaching-bathing technology, can guarantees that basic removing has totally guaranteed the quality of product by twice discharge opeing to the bigger dressing impurity of product quality influence.
As preferably, float the prescription that takes off agent and be: the hydrogen peroxide 6%-10% of 96% sodium hydroxide 1.5%-3%, 27.5%, scouring agent (K400) 0.4%-0.9%, stabilizing agent (A300) 0.4%-0.9%.Stabilizing agent (A300) is made of organic chelate and extraordinary organic adsorbent, and it has very strong complexation interdiction capacity to iron ion, makes ash, the residue of object being treated reduce to minimum degree, and the object being treated whiteness is pure simultaneously, and strength damage is few, sponginess.
The invention has the beneficial effects as follows: it solved effectively traditional take off bleaching process many, big energy-consuming consuming time, sewage reaches the problem that product easily turns to be yellow, becomes fragile more, the whiteness of product has improved 2-3 degree.Adopt technology of the present invention, under the prerequisite that product quality improves, shortened the process time, saved single degreasing process, taken off to float and unite two into one, steam, the electricity charge can save 20%-40%, production efficiency improves 20%-30%, sewage discharge simultaneously reduces 30%-40%, and overall cost declines to a great extent, and has good economic benefit and social benefit.
The specific embodiment
Embodiment 1
In the embodiment 1 of novel technique for dewatering and rinsing medical dressing by one-bath, adopt following process steps, wherein prewashing step is arranged on takes off before the bleaching-bathing technology, and has used the chemical substance that contains complexation, chelating and peptizaiton to extract the impurity metal ion that is unfavorable for decomposing hydrogen dioxide solution in natural fiber growth and the braiding process in technical process.New technology is carried out in two steps:
A. prewashing: be to add clean your white (CCW) about 15 kilograms, about 5 kilograms pre-washing agent of scouring agent (K400) of 0.25% of 0.75% in the water of 50 degree in temperature, with dressing prewashing 20 minutes in reactor, discharge opeing, and then pressurization washing or liquid flow water wash 15 minutes, draining liq.
B. float and take off: in reactor, add to float and take off agent, float the prescription that takes off agent and be: 96% sodium hydroxide 2.2% about 44 kilograms, 27.5% hydrogen peroxide 8% about 160 kilograms, scouring agent (K400) 0.65% about 13 kilograms, stabilizing agent (A300) 0.65% about 13 kilograms.Floating the adding method of taking off agent is: add earlier scouring agent and stabilizing agent at normal temperatures, temperature of reaction kettle rises to 50 when spending, and adds sodium hydroxide, and temperature of reaction kettle rises to 70 when spending, and adds hydrogen peroxide.After reactor is warming up to 110 degree, keep after 50 minutes dressing being carried out hot water pressurization washing, hot water pressurization washing step carries out in two steps, and first step temperature is 75 degree, and 15 minutes time, second Buwen's degree is 50 degree, 15 minutes time.The laggard capable overflow of hot water pressurization washing is washed operation, 20 minutes time.Overflow is washed and is carried out in the acid and after 20 minutes, dressing takes the dish out of the pot with sulphuric acid after operation is finished.
The percentage ratio of prescription is for dressing weight, and its weight is the prescription consumption of 50 " * 2 volumes or 33.5 " * 3 volume cheeses, and the ratio of interior outflow is 3 to 7.The prescription consumption can suitably be adjusted according to water quality, the different work of equipment.
Claims (6)
1. novel technique for dewatering and rinsing medical dressing by one-bath is characterized in that comprising following steps:
A. prewashing: add weight ratio with respect to dressing and be 0.5%-1% clean you white (CCW), 0.1%-0.5% scouring agent (K400), with dressing prewashing 10-40 minutes in temperature is 30-90 degree scopes in reactor, discharge opeing, again dressing is pressurizeed in reactor washing or liquid flow water wash 10-25 minutes, discharge opeing;
B. float and take off: in reactor, add and contain sodium hydroxide (NaOH), hydrogen peroxide (H
2O
2) float and take off agent, after reactor is warming up to 95-120 degree, keeps after 40-60 minutes dressing being carried out hot water pressurization washing 20-40 minutes, in the laggard capable acid of hot water pressurization washing with 10-30 minutes.
2. novel technique for dewatering and rinsing medical dressing by one-bath according to claim 1 is characterized in that the prescription of pre-washing agent in the described prewashing step is:
Clean that white (CCW): 0.65%-85%,
Scouring agent (K400): 0.2%-0.4%.
3. novel technique for dewatering and rinsing medical dressing by one-bath according to claim 1 is characterized in that having used the chemical substance that contains complexation, chelating and peptizaiton to extract the impurity metal ion that is unfavorable for decomposing hydrogen dioxide solution in natural fiber growth and the braiding process in technical process.
4. novel technique for dewatering and rinsing medical dressing by one-bath according to claim 1, be provided with the discharge opeing operation one after it is characterized in that using the extraction chemistry extracting substances in the prewashing step, add one pressurization washing or 10-15 minutes operations of liquid flow water wash after the discharge opeing operation again, discharge opeing.
5. novel technique for dewatering and rinsing medical dressing by one-bath according to claim 1, it is characterized in that the prewashing step is arranged on takes off before the bleaching-bathing technology.
6. novel technique for dewatering and rinsing medical dressing by one-bath according to claim 1, it is characterized in that described take off floating the prescription be:
96% sodium hydroxide: 1.5%-3%,
27.5% hydrogen peroxide: 6%-10%,
Scouring agent (K400): 0.4%-0.9%,
Stabilizing agent (A300): 0.4%-0.9%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101562307A CN101411885A (en) | 2007-10-18 | 2007-10-18 | Novel technique for dewatering and rinsing medical dressing by one-bath method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101562307A CN101411885A (en) | 2007-10-18 | 2007-10-18 | Novel technique for dewatering and rinsing medical dressing by one-bath method |
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| CN101411885A true CN101411885A (en) | 2009-04-22 |
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| CNA2007101562307A Pending CN101411885A (en) | 2007-10-18 | 2007-10-18 | Novel technique for dewatering and rinsing medical dressing by one-bath method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645121A (en) * | 2013-12-17 | 2014-03-19 | 北京光华纺织集团有限公司 | Water absorbency testing method of natural colored cotton fiber |
| CN104027837A (en) * | 2014-06-20 | 2014-09-10 | 东华大学 | Preparation method of sodium alginate-calcium carbonate hybrid particle modified functional cotton fabric |
| CN105002734A (en) * | 2015-07-01 | 2015-10-28 | 广东灵捷制造化工有限公司 | Degreasing and blenching auxiliary agent used for medical gauze one-step bath pretreatment, and preparation method thereof |
| CN106758129A (en) * | 2016-12-06 | 2017-05-31 | 陈剑璋 | The kiering method and its bleaching agent of a kind of gauze |
| CN108486859A (en) * | 2018-03-29 | 2018-09-04 | 鲁泰纺织股份有限公司 | The colouring method of the lasting purified cotton yarns of whiteness |
-
2007
- 2007-10-18 CN CNA2007101562307A patent/CN101411885A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103645121A (en) * | 2013-12-17 | 2014-03-19 | 北京光华纺织集团有限公司 | Water absorbency testing method of natural colored cotton fiber |
| CN104027837A (en) * | 2014-06-20 | 2014-09-10 | 东华大学 | Preparation method of sodium alginate-calcium carbonate hybrid particle modified functional cotton fabric |
| CN105002734A (en) * | 2015-07-01 | 2015-10-28 | 广东灵捷制造化工有限公司 | Degreasing and blenching auxiliary agent used for medical gauze one-step bath pretreatment, and preparation method thereof |
| CN106758129A (en) * | 2016-12-06 | 2017-05-31 | 陈剑璋 | The kiering method and its bleaching agent of a kind of gauze |
| CN106758129B (en) * | 2016-12-06 | 2018-12-18 | 陈剑璋 | A kind of the kiering method and its bleaching agent of gauze |
| CN108486859A (en) * | 2018-03-29 | 2018-09-04 | 鲁泰纺织股份有限公司 | The colouring method of the lasting purified cotton yarns of whiteness |
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Open date: 20090422 |