CN1236835A - Water needled non-woven cloth using waste silk as raw material and its production method - Google Patents
Water needled non-woven cloth using waste silk as raw material and its production method Download PDFInfo
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- 239000004744 fabric Substances 0.000 title claims abstract description 20
- 239000002699 waste material Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 91
- 238000004519 manufacturing process Methods 0.000 title claims description 20
- 238000000034 method Methods 0.000 claims abstract description 49
- 238000004061 bleaching Methods 0.000 claims abstract description 31
- 239000000463 material Substances 0.000 claims abstract description 23
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- 238000012216 screening Methods 0.000 claims abstract description 8
- 239000000835 fiber Substances 0.000 claims description 53
- 238000012545 processing Methods 0.000 claims description 52
- 239000012752 auxiliary agent Substances 0.000 claims description 26
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- 238000001914 filtration Methods 0.000 claims description 21
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 20
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- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 10
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- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052911 sodium silicate Inorganic materials 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 7
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- Nonwoven Fabrics (AREA)
Abstract
A aqueous spinning non-woven cloth as sanitary material is made up of waste silk through such technological steps as screening raw material, treating raw material (including degumming, bleaching and post-treating such as oil treating, opening and removing impurities) and aqueous spinning. Its advantages are advanced technique, soft mass, white and smooth surface, fine hand feel, no odour and low cost.
Description
The present invention relates to aqueous spinning non-woven cloth and production method thereof, particularly relate to aqueous spinning non-woven cloth and the production method thereof used as hygienic material, use waste silk as raw material.
Present nonwoven fabric product is made for purifying fibre or synthetic material 99% or more, and as employing terylene, nylon, viscose glue or the like, what contain pure natural fiber only has an all cotton non-woven fabric.All cotton non-woven fabric is to be raw material with the natural cotton.The cotton raw material is got easy, handles simply, is easy to satisfy water thorn processing request.--degreasing--bleaching--water thorn processing that its production method is to select materials.Natural cotton fiber is thicker, moderate length, and regularity is good, as long as reach more than the 29mm, almost need not screening, adopts the compact form processing mode directly to enter degreasing process.One deck plant fat is contained on the cotton fiber surface, in 100 ℃ of alkaline solutions, is just all taken off at an easy rate to the greatest extent in 30 minutes, and the degreasing auxiliary agent of employing is mainly soda ash.Carry out cold water flush after the degreasing.In the bleaching process, still adopt the compact form processing mode, the main auxiliary agent of usefulness is hydrogen peroxide and sodium silicate, and temperature is 100 ℃, and the time is 120 minutes, uses cold water flush.Produce all cotton non-woven fabric in this way, can cause the damage of string; The nonwoven fabric product of being produced contains a certain amount of dust and auxiliary agent residue, and feel is coarse.All cotton non-woven fabric is used as medical dressing in a large number as traditional product, the use of binding up a wound.But because its function singleness except skin not being had the irritated side effect, does not have other special benefits.What current medical dressing was best is compound wound material.This compound wound material is owing to be to be made by fibers material, thus on medical, there is certain limitation, as: the side effect that can produce allergy to some skin.
Silk cocoon is commonly called as silkworm.Extract long long filament more than 1000 meters out from silkworm cocoon, claim white long filament (just expecting).Silk fiber is to be made of two parts, is fibroin (silk-fibroin body) in the middle of the silk fiber.Be surrounded by silk gum at the fibroin skin.Silk gum is organic mixture of a kind of animal tallow glue and protein, can shield to fibroin.From the deliquescent difference of silk gum to hot water or alkali lye, the silk gum body can be divided into silk gum I, silk gum II, silk gum III, silk gum IV Zi outer again to internal layer.Be easy to dissolving from the silk gum I to the silk gum III, account for more than 90% of whole silk gum; And the silk gum IV that accounts for 3-5% just is difficult to remove.Can confirm this characteristic from the speed of coming unstuck of refining.Usually the silk raw material of usefulness all passes through and comes unstuck, and promptly sloughs the silk gum I to the silk gum III.Because not sloughing this layer glue just can't be used for weaving and bleachinging and dyeing.But still leave the cull of 3-5% above it, i.e. the silk gum IV.Leaving cull, also is the needs of weaving, can guarantee the intensity of silk.Because outer silk gum dissolves easily, so adopt general method of refining just it can be taken off.Conventional purifying method has, a chemical refining method, and b enzyme purifying method, c degenerates method.The auxiliary agent that uses is acid, alkali, enzyme etc.But these conventional methods expose separately deficiency to handling cull.Chemical method is difficult to take off most cull, and gloss, the feel of silk are relatively poor, the easy damaged fiber; Enzyme purifying method process conditions harshness is difficult to control, and quality is stable inadequately; The corruption method cycle is long, and production efficiency is low.These methods are handled then not ideal enough if be used in the leftover bits and pieces of silk.Its reason is not only to take off owing to cull itself is difficult, and is that leftover bits and pieces often has a large amount of greases, dirt.In addition, health is higher to the processing requirements of fiber with nonwoven fabric also is an important reasons.Equally, on bleaching process, also exist similar problem.The silk bleaching has two big difficult points, and the one, whiteness is difficult to improve.The silk fiber surface of coming unstuck later also slightly has silk gum, and this layer animal tallow influenced, hindered the oxidation reaction in the bleaching process widely; The 2nd, just because of the very thin glue of this layer is arranged, and the dust in the stabilizing agent of using will bleach the time adsorbs, and dust can discharge pollution recirculated water in spun-laced machine.To the silk fiber bleaching, adopt the hydrogen peroxide bleaching method at present.Its main auxiliary agent and content are generally, hydrogen peroxide 35%, sodium silicate 50%, caustic soda about 10%; Temperature 90-95 ℃.The maximum deficiency of this bleaching process is, fiber is easily impaired, and feel is not good, and chemical residue is difficult to clean etc.If be used for the silk offcut bleaching, then problem is more outstanding, and whiteness is undesirable, improve whiteness, then will increase the sodium silicate ratio, and fiber is easier embrittlement therefore.So no matter traditional handicraft comes unstuck, still bleaching all can not be satisfied the processing requirements of aqueous spinning non-woven cloth to silk fiber.With regard to long filament, the single fiber length of domestic silkworm silk is generally all more than 1000 meters, as will very long domestic silkworm silk will be cut off, and the long filament cutting cost being very high, is difficult to commercialization as the nonwoven raw material.Long filament reaches back long filament etc. through producing leftover bits and pieces after the processed as spun silk head, time cotton, cocoon skin silk.At present these leftover bits and pieces also of no use are made the raw material of spunlace non-woven cloth, also just do not make amenities naturally.
The purpose of this invention is to provide a kind of aqueous spinning non-woven cloth and production method thereof, and make hygienic material with this aqueous spinning non-woven cloth with waste silk as raw material.
The object of the present invention is achieved like this.
Production method of the present invention is that raw material screening processing → raw material is handled and come unstuck, bleaches → water thorn processing → product.
Raw material screening processing: adopt the domestic silkworm silk waste material to make raw material and must carry out raw material screening processing.Domestic silkworm silk waste material kind is a lot, can utilize do spunlace non-woven cloth must meet length at 4-6cm, do not have the following staple fibre of 2cm substantially, no short flannel, lint, the boiled-off silk of line density (dtex)＞1 or half-mature, and be filament.Processing method is, at first the whole shreddings of the end of a thread in the domestic silkworm silk waste material become the filament shape, dredges on the machine in essence then filament different in size is carried out regularity processing.Short removal, long breaks, and simultaneously foreign material is wherein also removed.Because the quality of raw materials quality, with directly have influence on can degumming and refining thoroughly and even satisfy the requirement of spun-laced machine to fiber.
Raw material is handled: in the present invention, it is one of key technology that raw material is handled, and not only directly influences the normal operation of non-woven fabrics apparatus, and has determined the quality of final finished.Raw material is handled to divide and is come unstuck bleaching.
1. come unstuck: concerning make the nonwoven fabric amenities with the domestic silkworm silk waste material, come unstuck and thoroughly promptly must slough the cull that silk offcut leaves, otherwise finished product can have the silk gum stink, and amenities is what not allow with any peculiar smell.If silk gum takes off to the greatest extent fully, can damage the silk-fibroin tissue in the silk fiber again, can make the fiber embrittlement, easily broken, influence the intensity of silk fiber.How should protect the necessary powerful of fiber, take off most colloid again as much as possible, be the problem that needs solution.The key of problem is, at the characteristics of silk offcut, slough cull rightly.Through the comparison to several traditional degumming method, the present invention adopts two step method to solve this problem.Before enzymatic treatment, carry out refining just with alkali earlier, grease, dirt outside the silk gum are removed substantially, handle through enzyme again.Can make the enzyme effect abundant like this, eliminate the action condition that influences enzyme because of operational error, cause coming unstuck not exclusively, phenomenon uniformly, promptly reduce the burden of enzyme effect to a certain extent.And then formally enter enzyme and come unstuck the stage.When adopting spun silk head leftover bits and pieces to be raw material, processing mode is loose formula; Put into raw material and auxiliary agent in container, auxiliary agent adopts the soda ash of 90-92% alkali protease and 8-10%, and temperature is 60-63 ℃, and the time is 20-25 minute, afterwards with hot water once, the cold water secondary cleans.
When adopting back cotton, cocoon skin silk and long filament leftover bits and pieces to be raw material, processing mode is a compact form; Put into raw material and auxiliary agent in container, auxiliary agent adopts the soda ash of 90-95% refining agent and 5-10%, and temperature is 95-100 ℃, and the time is 15-20 minute, afterwards with hot water once, the cold water secondary cleans.
No matter be to adopt loose formula to handle or the compact form processing, all should guarantee that solution and silk fiber work is relative mobile, water quality will be done softening the processing.Said method had both utilized and had brought into play come unstuck gentleness, fast of protease, the degree of removing photoresist height, and do not hinder the excellent properties of fibroin, also reduced the use difficulty of enzyme, make the silk offcut after coming unstuck that a more satisfactory effect be arranged, promptly smooth, odorless, powerful good are for prerequisite has preferably been created in bleaching processing.
Bleaching: as the silk that hygienic material is used, must carry out the bulk fibre bleaching, be particular about the whole structure of single fiber bleaching.For solving the difficult point that exists in the silk bleaching process, the method that the present invention adopts is that a reduces sodium silicate in auxiliary agent.Be difficult to clean because contain a large amount of solid residues in the sodium silicate, reduce part and replace with hydrogen peroxide stabilizer, this stabilizing agent can not produce any solids, the problem that fiber is coarse to solve, embrittlement, surface leave a large amount of auxiliary agent residues.B suitably adds soda ash and bleeding agent in bleaching, to help to slough few cull, strengthen the hydrogen peroxide effect, reaches the purpose that brightens.Processing mode is a compact form, bleaches main auxiliary agent and comprises, 30-35 hydrogen peroxide, 45-50% hydrogen peroxide stabilizer and 10-15% sodium silicate, other auxiliary agent 5-10%; Temperature is 90-95 ℃, and the time is 80-90 minute, and with containing the acetic acid hot water injection, water quality will be done softening the processing afterwards, and flushing is wanted thoroughly.
For in the water jet process process, prolong spun-laced machine service life, can behind bleaching process, increase postfinishing process.The back arrangement is divided into three process, i.e. finish processing, shredding processing and impurities removing.The intensity of silk fiber own is lower, because of the bleaching agent oxidation more or less exists feel coarse, directly uses on the spun-laced machine after bleaching, and is easy to be broken, and produces staple fibre, also can produce bigger static, causes auxilliary net irregular, and finished product nonwoven fabric thickness differs.For avoiding these phenomenons, the present invention has taked two big additional measures, and promptly finish is handled and the shredding processing.
Finish is handled: the weaving lubricant of no side effects is dissolved in warm water with the ratio of 1-3 grams per liter, this solvent is stirred with raw material equably again, and control regain＜15%, open and use after sealing at least 24 hours with the plastic sheeting housing at last.This will help between fiber lubricated significantly, reduce friction, reduce staple fibre and static during combing.
Shredding is handled: silk fiber is thin, soft, long, and easy the generation twined or agglomerating phenomenon after bleaching, and when road water stings manufacturing procedure down, is difficult to they are opened, and comb has been unclamped, and also is easy to cross senior general's fiber because of cohesive force and breaks.This just need continue to use carding machine (or opener) comb pine to the raw material of handling through bleaching, finish.Also help differentiating, picking foreign material after the shredding well.
Impurities removing: remove metal, rubbish and colored fibre etc.
Through the processing of above-mentioned technology, it is neat that the silk raw material that can be used for the device fabrication of water thorn nonwoven has had length, and intensity is guaranteed, CN/dtex＞3.5; Loose between silk fiber, smooth, no short flannel, dust, foreign material, free from extraneous odour, not perishable, whiteness is good.
Can adopt traditional water thorn processing technology.Earlier silk fiber is carded to sheet, carries out the water thorn then, promptly water ejects by tiny eyelet, acts on the silk fiber sheet, and silk fiber is wound in nonwoven fabric, and the water that ejects is inhaled into the aqueous vapor separating tank and filters the recirculation use.But owing to silk fiber is carefully grown, what can leave the staple fibre of a part of 0.5-2cm in raw material is handled.These staple fibres are free in the water circulation system along with the cycle of higher pressure water electrode easily passes common water filtering system, and the time one is long, the water acanthopore will be blocked, and not only influence water thorn effect, and pollute recirculated water, excessive consumption of filter material.The present invention is for reducing staple fiber in the recirculated water, that takes improves one's methods, the one, in water circulation system, increase by two road screen packs, the mesh diameter of the bag type filtering net that increases newly is less than the mesh diameter of original screen pack, promptly less than the mesh of other screen pack in the water circulation system.The 2nd, reduce the pressure of water in the circulatory system, the 3rd, increase by two washing basins.The water jet process flow process: new water enters big pond → water and enters the II washing basin that increases newly → bag type filtering net → process the core formula filtration and the pin cotton screen pack → water of the filtrations → water thorn of water supercharging → first → remove aqueous vapor → water is put into filtration water bed → increase newly by two roads is entered the I washing basin that increases newly, bleed off part water, the remaining part water II washing basin that reinjects is done next circulation with the new water that replenishes.The effect that increases washing basin is, recirculated water is through the multiple times of filtration net filtration, flow to the I washing basin, through certain hour (generally about 2-3 hour), the water of I washing basin is bled off a part (because whatsoever filtration system all can't filter out the free shape fiber 100% in the water, diffusing through how much leaving small part in the recirculated water after filtering) from fiber, remaining part water injects the II washing basin, replenish the new water of a part simultaneously, make and reduce the bulk fibre that is in free state in the water as far as possible, the probability that the water acanthopore is blocked drops to minimum, to guarantee the spunlace non-woven cloth quality, prolongs the service life of spun-laced machine.The effect that increases screen pack has two, and the one, by reducing the mesh diameter of this net, can filter out the silk fiber in the recirculated water effectively; The 2nd, behind increase by the two road screen packs, the pressure of recirculated water has been fallen widely, when making circulating water flow at last to pin cotton screen pack, pressure is almost near zero, eliminated the phenomenon that makes silk fiber pass last one screen pack by force because of hydraulic pressure is excessive, made the cotton screen pack of pin really play the last effect that substantially all eliminates of the silk fiber of will slip through the net in the preceding filter process.
Produce the production method of aqueous spinning non-woven cloth among the present invention with waste silk as raw material, technology advanced person, science, the real silk non-woven cloth quality softness of production, smooth surface is pure white, feel exquisiteness, free from extraneous odour, cost is low, has solved that silk offcut comes unstuck, the difficult point in the bleaching process, and water jet process is reasonable.Make hygienic material with the real silk non-woven cloth that the production method among the present invention is produced, natural silk with 100% is a raw material, no any additives, have the proteosome the most close with human body, be easily human body and inhale (connecing) receipts, can not produce any side effect, can restrain diffusate, stop outside bacterium to be invaded wound to skin.It not only has the repertoire of all cotton non-woven fabric hygienic material and compound hygienic material, and general effect obviously surmounts above-mentioned two kinds of hygienic materials.Real silk non-woven cloth hygienic material among the present invention, not bonding wound not only plays inhibitory action to the wound bacterium in the use, and can reduce the wound bacterium; Make wound restrain sooner, healing effect is better.When product of the present invention is done the use of wound material, both made to pass into silence in human body, the digestion that also can be absorbed by the body is fallen.The present invention is up to now, and is ideal and be the wound dressing that can not be substituted in the hygienic material.
The present invention is provided by following examples and accompanying drawing thereof.Accompanying drawing is a water circulation system work schematic diagram
Technical process is:
Come unstuck
Raw material screening--→ raw material processing bleaching--processing of → water thorn--→ finished product
Back arrangement (finish processing, shredding processing and impurities removing)
Raw material screening processing: the domestic silkworm silk waste material must meet length at 4-6cm, does not have the following staple fibre of 2cm substantially, no short flannel, lint, and the boiled-off silk of line density (dtex)＞1 or half-mature silk, and be filament.Processing method is, at first the whole shreddings of the end of a thread in the domestic silkworm silk waste material become the filament shape, dredges on the machine in essence then filament different in size is carried out regularity processing.Short removal, long breaks, and simultaneously foreign material is wherein also removed.
Raw material is handled and is divided into three process.1. come unstuck: when adopting spun silk head leftover bits and pieces to be raw material, processing mode is loose formula; Put into raw material and auxiliary agent in container, auxiliary agent adopts the soda ash of 90% alkali protease and 10%, and temperature is 62 ℃, and the time is 20 minutes, afterwards with hot water once, the cold water secondary cleans.
When adopting back cotton, cocoon skin silk and long filament leftover bits and pieces to be raw material, processing mode is a compact form; Put into raw material and auxiliary agent in container, auxiliary agent adopts the soda ash of 90% refining agent and 10%, and temperature is 100 ℃, and the time is 15 minutes, afterwards with hot water once, the cold water secondary cleans.
No matter be to adopt loose formula to handle or the compact form processing, all should guarantee that solution and silk fiber work is relative mobile, water quality will be done softening the processing.
2. bleaching: processing mode is a compact form, and auxiliary agent is 35% hydrogen peroxide, 50% hydrogen peroxide stabilizer and 10% sodium silicate, and an amount of other auxiliary addition agent; Temperature is 95 ℃, and the time is 90 minutes, and with containing the acetic acid hot water injection, water quality will be done softening the processing afterwards, and flushing is wanted thoroughly.
3. the back arrangement is divided into three process, i.e. finish processing, shredding processing and impurities removing.
Finish is handled: the weaving lubricant of no side effects is dissolved in warm water with the ratio of 1-3 grams per liter, this solvent is stirred with raw material equably again, and control regain＜15%, open and use after sealing at least 24 hours with the plastic sheeting housing at last.
Shredding is handled: the raw material of handling through bleaching, finish is continued to use carding machine (or opener) comb pine.Also help differentiating, picking foreign material after the shredding well.
Impurities removing: remove metal, rubbish and colored fibre etc.
Through the processing of above-mentioned technology, it is neat that the silk raw material that can be used for the device fabrication of water thorn nonwoven has had length, and intensity is guaranteed, CN/dtex＞3.5.
Water thorn processing: earlier silk fiber is carded to sheet, carry out the water thorn then, promptly water ejects by tiny eyelet, acts on the silk fiber sheet, silk fiber is wound in nonwoven fabric, and the water that ejects is inhaled into the aqueous vapor separating tank and filters the recirculation use.The water jet process flow process: new water enters big pond → water and enters the II washing basin that increases newly → bag type filtering net → process the core formula filtration and the pin cotton screen pack → water of the filtrations → water thorn of water supercharging → first → remove aqueous vapor → water is put into filtration water bed → increase newly by two roads is entered the I washing basin that increases newly, bleed off part water, the remaining part water II washing basin that reinjects replenishes the new water of a part simultaneously and enters next water circulation.The mesh diameter of the bag type filtering net that increases newly is less than the mesh diameter of the screen pack that original chemical fibre uses.
Claims (5)
1, a kind of production method of the spunlace non-woven cloth with waste silk as raw material includes bleaching, water thorn processing technology, it is characterized in that technical process includes also that raw material screening is processed, raw material comes unstuck, bleaching and treating process;
Technical process is:
Raw material screening--→ raw material is handled and to be come unstuck--processing of → water thorn--→ finished product
Bleaching
(1), raw material screening processing: the whole shreddings of the end of a thread in the domestic silkworm silk waste material are become the filament shape, dredge on the machine in essence then filament different in size is carried out regularity processing, short removal, long breaks, and simultaneously foreign material is wherein also removed; Meet length at 4-6cm, do not have the following staple fibre of 2cm substantially, no short flannel, lint, the filament of the boiled-off silk of line density (dtex)＞1 or half-mature silk;
(2), raw material is handled to be divided into and is come unstuck, bleaches;
1. come unstuck: processing mode is different and different with the raw material that adopts; When adopting spun silk head leftover bits and pieces to be raw material, processing mode is loose formula; Put into raw material and auxiliary agent in container, auxiliary agent adopts the soda ash of 90-92% alkali protease and 8-10%, and temperature is 60-63 ℃, and the time is 20-25 minute, afterwards with hot water once, the cold water secondary cleans;
When adopting back cotton, cocoon skin silk and long filament leftover bits and pieces to be raw material, processing mode is a compact form; Put into raw material and auxiliary agent in container, auxiliary agent adopts the soda ash of 90-95 refining agent and 5-10%, and temperature is 95-100 ℃, and the time is 15-20 minute, afterwards with hot water once, the cold water secondary cleans;
No matter be to adopt loose formula to handle or the compact form processing, all should guarantee that solution and silk fiber work is relative mobile, water quality will be done softening the processing;
2. bleaching: processing mode is a compact form, and bleaching host comprises 30-35% hydrogen peroxide, 45-50% hydrogen peroxide stabilizer and the following sodium silicate of 10-15%; Other auxiliary agent 5-10%; Temperature is 90-95 ℃, and the time is 80-90 minute, and with containing the flushing of acid heat water, water quality will be done softening the processing afterwards, and flushing is wanted thoroughly.
2, according to the described production method of using the spunlace non-woven cloth of waste silk as raw material of claim 1, it is characterized in that in the material treatment process after bleaching, also having postfinishing process; Divide three process in the postfinishing process, i.e. finish processing, shredding processing, impurities removing;
1., finish handles: the weaving lubricant of no side effects is dissolved in warm water with the ratio of 1-3 grams per liter, this solvent is stirred with raw material equably again, and control regain＜15%, at last with plastic sheeting housing sealing at least 24 hours;
2., shredding is handled: will be loose with carding machine or opener comb through the raw material that above-mentioned operation was handled;
3., impurities removing: remove metal, rubbish and colored fibre etc.
3, the production method of producing aqueous spinning non-woven cloth according to claim 1, the useless silk of 2 described usefulness is characterized in that increasing in the water cycle process in water jet process two washing basins, two bag type filtering nets;
Water thorn work flow:
New water enters big pond → water and enters the II washing basin that increases newly → bag type filtering net → process the core formula filtration and the pin cotton screen pack → water of the filtrations → water thorn of water supercharging → first → remove aqueous vapor → water is put into filtration water bed → increase newly by two roads is entered the I washing basin that increases newly, bleed off part water, reinject II washing basin and Xin Shui of remaining part water enters circulation next time; The mesh diameter of the bag type filtering net that increases newly is less than the mesh of original screen pack.
4, the production method of stating according to claim 3 with the spunlace non-woven cloth of waste silk as raw material is characterized in that in the degumming tech that when being raw material with spun silk head leftover bits and pieces, auxiliary agent adopts the soda ash of 90% protease and 10%, and temperature is 62 ℃, and the time is 20 minutes; When adopting back cotton, cocoon skin silk and long filament leftover bits and pieces to be raw material, auxiliary agent adopts the soda ash of 90% refining agent and 10%, and temperature is 100 ℃, and the time is 15 minutes;
In the bleaching process, bleaching host comprises that auxiliary agent is 35% hydrogen peroxide, 50% hydrogen peroxide stabilizer and 10% following sodium silicate; Temperature is 95 ℃, and the time is 90 minutes.
5, a kind of spunlace non-woven cloth is characterized in that using waste silk as raw material, according to the production method production of claim 3.
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| CN99113694A CN1095509C (en) | 1999-05-12 | 1999-05-12 | Water needled non-woven cloth using waste silk as raw material and its production method |
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| CN99113694A CN1095509C (en) | 1999-05-12 | 1999-05-12 | Water needled non-woven cloth using waste silk as raw material and its production method |
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