CN109930225A - White viscose rayon of a kind of no chlorine drift height and preparation method thereof - Google Patents
White viscose rayon of a kind of no chlorine drift height and preparation method thereof Download PDFInfo
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- CN109930225A CN109930225A CN201910126110.5A CN201910126110A CN109930225A CN 109930225 A CN109930225 A CN 109930225A CN 201910126110 A CN201910126110 A CN 201910126110A CN 109930225 A CN109930225 A CN 109930225A
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Abstract
The present invention relates to chemical fibre processing technique fields, more particularly, to a kind of no high white viscose rayon of chlorine drift and preparation method thereof, selecting no chlorine drift dissolving pulp pulp is raw material, prepares rayon spinning stoste, and it is sent into spinning machine after mixing with titanium oxide dispersion, solidification regeneration goes out as-spun fibre；As-spun fibre is formed through drawing-off, orientation, and there is the fiber of some strength to enter villus slot, conche after cutting off, and is made using low-temperature activation oxygen bleaching process without the high white viscose rayon of chlorine drift.The no high white viscose rayon of chlorine drift prepared by the present invention, whiteness is higher, fault content is extremely low, residual sulfur content is few, can be used for all kinds of non-woven fabrics and material field is defended in medical treatment；By using low-temperature activation oxygen bleaching process, the pollution problem using chlorine compound in waste water caused by chlorine bleaching process is avoided；Compared with high temperature oxygen bleaching process, the present invention advantageously reduces energy consumption, reduces fibrous mechanical property damage, realizes fibrous mechanical property and the overall balance that whiteness improves.
Description
Technical field
The present invention relates to chemical fibre processing technique fields, float high white viscose rayon and its preparation side more particularly, to a kind of no chlorine
Method.
Background technique
Clean high white viscose rayon is a kind of differential viscose rayon, has been widely used for non-woven fabrics and the neck such as material is defended in medical treatment
Domain.Whiteness is the important evaluation index of clean high white viscose rayon.It is main in the production of viscose rayon for the whiteness for improving fiber
Fiber bleached by using sodium hypochlorite or hydrogen peroxide, but be bleached using chlorine or chlorine compound, in bleaching effluent
There are the pollution problems of chlorine compound, and only with hydrogen peroxide bleaching, there are fibre whiteness not enough to cause with dioxygen water consumption height
The problems such as fibrous mechanical property damages.It in the prior art, is the whiteness for improving fiber, application No. is CN 201010501442.6
Patent disclose a kind of preparation method completely without the high white fiber cellulose fiber of chlorine, it is main that fiber is improved by addition fluorescent whitening agent
Whiteness, be not directed to hydrogen peroxide bleaching technology.
Application No. is the patents of CN201610743740.3 to disclose a kind of high white viscose staple fibre and preparation method thereof, adopts
With the bleaching process twice of sodium hypochlorite alkaline solution and activating hydrogen peroxide alkaline solution, high white viscose rayon is made, whiteness can
To reach 92% or more, and strength and elongation and the soft handle degree of fiber are unaffected, activator used in this application patent
For tetraacetyl ethylene diamine.
Application No. is the patents of CN 201210469572.5 to disclose a kind of method of cotton stalk bark fiber cellulose fiber bleaching,
Using the bleaching process twice of sodium hydrosulfite bleaching and hydrogen peroxide bleaching, cotton stalk bark fiber cellulose fiber whiteness obtained is good, improves
Feel, the flexibility of fiber, improve the spinning performance of fiber, auxiliary agent used in this application patent include urea, magnesium sulfate,
Bleeding agent etc., bleaching time are 45~55min.
Above-mentioned to apply for a patent, some still uses sodium hypochlorite bleaching, though and have using hydrogen peroxide bleaching, bleaching
Time is longer.Due to some fluorescent whitening agents be added to medical treatment defend it is safe to the human body in material there are potential risks, therefore for meet
The market demand needs further to develop the preparation process completely without the high white viscose rayon of chlorine without fluorescent whitening agent.
Summary of the invention
The technical problems to be solved by the present invention are: in view of the deficienciess of the prior art, provide a kind of fibre whiteness it is high,
Fibrous mechanical property damages high white viscose glue dimension of less no chlorine drift and preparation method thereof.
To solve the above problems, the specific technical proposal of the invention is:
A kind of no high white viscose rayon of chlorine drift, prepares gained by following preparation method, specifically includes the following steps:
(1) preparation of rayon spinning stoste: selecting no chlorine drift dissolving pulp pulp is raw material, is included dipping, squeezing, powder
Broken, experienced, yellow, dissolution and maturation and etc. prepare rayon spinning stoste, and sent after mixing with titanium oxide dispersion
Enter spinning machine；The quality proportioning of titanium dioxide and pure water is 1:4~1:5 in the titanium oxide dispersion；Titanium dioxide with
The quality proportioning of first fibre is 0.5:100~1.0:100 in viscose glue stoste.
(2) rayon spinning:
Spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, is reacted in acid bath groove with coagulating bath, is coagulated
Admittedly regenerating as-spun fibre；The as-spun fibre of solidification regeneration forms the fiber with some strength after cutting off through drawing-off, orientation
Into villus slot；Being broken up fiber by the steam bubble that villus trench bottom steam pipe aperture sprays keeps fiber layer thickness uniform.
The spinning speed of the spinning machine is 45~60m/min.
(3) post-processing of viscose rayon:
The short rayon fiber suede come out from villus slot is sent into conche, washed through a washing, desulfurization, two washings, bleaching, three,
Pickling is washed eventually, is oiled, being dehydrated, being made after baking process without the high white viscose rayon of chlorine drift.One washing temperature be 70~
75 DEG C, two washing temperatures are 60~80 DEG C, and three washing temperatures are 55~70 DEG C, and the whole washing temperature is 70~75
℃；The desulfurizing agent that sweetening process uses is one or both of sodium hydroxide, vulcanized sodium, and desulfurizing agent concentration takes off in 2~5g/L
Sulphur temperature is 65~80 DEG C；The bleaching agent is hydrogen peroxide, and additive amount is 3~16g/L；Bleaching process uses activator and infiltration
Saturating agent aid, wherein the additive amount of activator is 0.6~4g/L, and the additive amount of bleeding agent is 0.2~1g/L；The bleaching temperature
Degree is 60~80 DEG C, and for the control of bleaching liquid pH value 9~12, bleaching time is 3~4min.Activator is amides compound.It seeps
Saturating agent is to contain carboxylic acid group and sulfonic poly alkyl alcohol ethers surfactant in ingredient.
The technical parameter of the resulting no high white viscose rayon of chlorine drift are as follows: 1.32~1.75dtex of fiber number；32~40mm of length；
Dry breaking strength >=2.10cN/dtex；Dry elongation at break 19.0%~22.0%；Whiteness >=87.0%；Fault content≤
1.5mg/100g；Residual sulfur content≤5mg/100g；Surface-active substance≤3mm；Water solubles content≤0.6%.
Present invention use floats dissolving pulp pulp without chlorine, to ensure to be free of the chemical component of chlorine element in fiber.No chlorine drift
The whiteness of dissolving pulp pulp is 89% or more, first fibre content is 90% or more.
The present invention is conducive to the whiteness for improving fiber by the titanium dioxide delustering agent of the high whiteness of addition.
The present invention is by optimization spinning speed, to obtain suitable bleaching time, it is ensured that the balance of yield and quality index.
The inlet steam pressure of villus slot of the present invention is 1.0-1.5bar, under steam pressure effect, villus slot bottom
The aperture of portion's steam pipe sprays steam bubble and pops in liquid level, and fiber is broken up and keeps fiber layer thickness uniform.In addition, high temperature steams
Vapour is by the sour gas and CS in fiber2Boiling enters condensate recovery system after coming out, to largely reduce the residual sulphur in fiber
Content.
The present invention carries out desulfurization by the desulfurizing agent of addition debita spissitudo in sweetening process, to enhance desulfurization effect, and
Improve the whiteness of fiber before bleaching.
The present invention contains carboxylic acid group and sulfonic poly alkyl alcohol ethers surfactant by adding in bleaching process
Bleeding agent, be a kind of efficient and environment-friendly type surfactant, advantageously reduce the surface tension of solution, accelerate bleaching agent to fiber
Internal infiltration plays synergistic effect to fibre whiteness is improved.
The present invention adds a certain proportion of activator containing amide group in bleaching process, can react and give birth to hydrogen peroxide
At the higher substance of oxidation activity, it carry out bleaching can at a lower temperature, advantageously reduce the damage of fibrous mechanical property.
The present invention advantageously reduces bleaching liquid temperature fluctuation, by increasing by two water temperatures washed to improve bleaching effect.
The present invention to reduce metallic compound impurity content, and adjusts the pH value of fiber by acid cleaning process.
Oil solution dedicated nonwoven used in the present invention is this finish of Japanese bamboo, has antistatic and smoothing effect, to human body
It is safe and non-toxic.
A kind of no high white viscose rayon of chlorine drift provided by the invention and preparation method thereof, has the advantages that
(1) present invention is prepared for a kind of novel no high white viscose rayon of chlorine drift, and fault content is extremely low, and residual sulfur content is few,
Surface-active substance is few, water solubles content is low, can be used for all kinds of non-woven fabrics and material field is defended in medical treatment.
(2) present invention uses hydrogen peroxide bleaching process, avoids chlorine in waste water caused by bleaching using chlorine or chlorine compound
The pollution problem of compound.
(3) present invention is conducive to drop using low-temperature activated bleaching technique compared with traditional hydrogen peroxide high-temperature bleaching technique
Low energy consumption reduces fibre property damage, improves bleaching effect.
(4) present invention adds environmental protection infiltration agent aid in bleaching process, to further increase the whiteness of fiber.
Specific embodiment
It is described in conjunction with the embodiments the specific technical solution of the present invention.
Embodiment 1
(1) preparation of rayon spinning stoste: by whiteness be 89%, first fibre content is 90% without chlorine drift dissolving pulp pulp
For raw material, included dipping, squeezing, crushing, experienced, yellow, dissolution and maturation and etc. prepare rayon spinning stoste, and with two
Titanium oxide dispersion liquid is sent into spinning machine after mixing；The quality of titanium dioxide and pure water is matched in the titanium oxide dispersion
Than for 1:4；The quality proportioning of first fibre is 1.0:100 in titanium dioxide and viscose glue stoste.
(2) rayon spinning:
Spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, is reacted in acid bath groove with coagulating bath, is coagulated
Admittedly regenerating as-spun fibre；The as-spun fibre of solidification regeneration converges growth stock tow to drafting machine through godet, two baths, and at it
Between carry out drawing-off, orientation formed have some strength fiber after cutting off enter villus slot.The coagulating bath includes 110g/L
Sulfuric acid, the sodium sulphate of 300g/L, the zinc sulfate of 7g/L and 10g/L 653 surfactant of Berol Spin.The acid bath
Temperature be 45 DEG C；The spinning head is made of 45 small spray cap, and each spinneret cap has 2100 holes, micropore size again
0.06mm.The spinning speed is 45m/min.Two bath includes the sulfuric acid of 30g/l, and two bath temperatures are 60 DEG C, and two baths are led
Stretching rate is 30%.The inlet steam pressure of the villus slot is 1.4bar.
(3) post-processing of viscose rayon:
The short rayon fiber suede come out from villus slot is sent into conche, washed through a washing, desulfurization, two washings, bleaching, three,
Pickling, wash, oil eventually, being dehydrated, fiber number 1.75dtex is made after baking process, length is 40mm fine without the high white viscose glue of chlorine drift
Dimension.One washing temperature is 70 DEG C, and two washing temperatures are 60 DEG C, and three washing temperatures are 55 DEG C, the whole water
Washing temperature is 70 DEG C；The desulfurizing agent that sweetening process uses is sodium hydroxide, vulcanized sodium, naoh concentration 2g/L, vulcanized sodium
Concentration is 2g/L, and desulfurization temperature is 65 DEG C；Carboxylic acid group and sulfonic poly alkyl alcohol ethers table will be contained respectively in blanching step
Bleeding agent, amides activator, the hydrogen peroxide of face bioactive agent composition are added in bleaching lye, and wherein the additive amount of bleeding agent is
0.2g/L, the additive amount of activator are 0.7g/L, and the additive amount of hydrogen peroxide is 3g/L；The bleaching temperature is 80 DEG C, bleaching
Lye pH value is 9, bleaching time 4min.The sulfuric acid of 3g/L is added in acid cleaning process, the used postal agent that oils is this postal of bamboo
Agent, the oil agent addition are 4g/L, and the pH value of tow is 7.1 after oiling.The drying temperature is 140 DEG C, after drying, is obtained
To the high white viscose rayon product of no chlorine drift, product regain is controlled 13%.
The index of quality of the resulting no high white viscose rayon of chlorine drift are as follows: fiber number 1.75dtex；Length 40mm；Dry breaking strength
≥2.10cN/dtex；Dry elongation at break 19.0%~22.0%；Whiteness is 87.0%；Fault content≤1.5mg/100g；It is residual
Sulfur content≤5mg/100g；Surface-active substance≤3mm；Water solubles content≤0.6%.
Embodiment 2
(1) preparation of rayon spinning stoste: by whiteness be 89%, first fibre content is 90% without chlorine drift dissolving pulp pulp
For raw material, included dipping, squeezing, crushing, experienced, yellow, dissolution and maturation and etc. prepare rayon spinning stoste, and with two
Titanium oxide dispersion liquid is sent into spinning machine after mixing；The quality of titanium dioxide and pure water is matched in the titanium oxide dispersion
Than for 1:5；The quality proportioning of first fibre is 0.5:100 in titanium dioxide and viscose glue stoste.
(2) rayon spinning:
Spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, is reacted in acid bath groove with coagulating bath, is coagulated
Admittedly regenerating as-spun fibre；The as-spun fibre of solidification regeneration converges growth stock tow to drafting machine through godet, two baths, and at it
Between carry out drawing-off, orientation formed have some strength fiber after cutting off enter villus slot.The coagulating bath includes 110g/L
Sulfuric acid, the sodium sulphate of 300g/L, the zinc sulfate of 7g/L and 10g/L 653 surfactant of Berol Spin.The acid bath
Temperature be 45 DEG C；The spinning head is made of 45 small spray cap, and each spinneret cap has 2100 holes, micropore size again
0.06mm.The spinning speed is 60m/min.Two bath includes the sulfuric acid of 30g/l, and two bath temperatures are 62 DEG C, and two baths are led
Stretching rate is 35%.The inlet steam pressure of the villus slot is 1.5bar.
(3) post-processing of viscose rayon:
The short rayon fiber suede come out from villus slot is sent into conche, washed through a washing, desulfurization, two washings, bleaching, three,
Pickling, wash, oil eventually, being dehydrated, fiber number 1.32dtex is made after baking process, length is 32mm fine without the high white viscose glue of chlorine drift
Dimension.One washing temperature is 75 DEG C, and two washing temperatures are 80 DEG C, and three washing temperatures are 70 DEG C, the whole water
Washing temperature is 75 DEG C；The desulfurizing agent that sweetening process uses is sodium hydroxide, naoh concentration 5g/L, desulfurization temperature 75
℃；Respectively by bleeding agent, amides containing carboxylic acid group and sulfonic poly alkyl alcohol ethers surfactant in blanching step
Activator, hydrogen peroxide are added in bleaching lye, and wherein the additive amount of bleeding agent is 1g/L, and the additive amount of activator is 4g/L,
The additive amount of hydrogen peroxide is 16g/L；The bleaching temperature is 60 DEG C, and bleaching lye pH value is 12, bleaching time 3min.Acid
The sulfuric acid of 4g/L is added during washing, the used postal agent that oils is this postal of bamboo agent, and the oil agent addition is 3.5g/L, is oiled
The pH value of tow is 7.2 afterwards.The drying temperature is 140 DEG C, after drying, obtains no high white viscose rayon product of chlorine drift, produces
Product regain is controlled 13%.
The index of quality of the resulting no high white viscose rayon of chlorine drift are as follows: fiber number 1.32dtex；Length 32mm；Dry breaking strength
≥2.10cN/dtex；Dry elongation at break 19.0%~22.0%；Whiteness is 88.0%；Fault content≤1.5mg/100g；It is residual
Sulfur content≤5mg/100g；Surface-active substance≤3mm；Water solubles content≤0.6%.
Embodiment 3
(1) preparation of rayon spinning stoste: by whiteness be 89%, first fibre content is 90% without chlorine drift dissolving pulp pulp
For raw material, included dipping, squeezing, crushing, experienced, yellow, dissolution and maturation and etc. prepare rayon spinning stoste, and with two
Titanium oxide dispersion liquid is sent into spinning machine after mixing；The quality of titanium dioxide and pure water is matched in the titanium oxide dispersion
Than for 1:5；The quality proportioning of first fibre is 0.7:100 in titanium dioxide and viscose glue stoste.
(2) rayon spinning:
Spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, is reacted in acid bath groove with coagulating bath, is coagulated
Admittedly regenerating as-spun fibre；The as-spun fibre of solidification regeneration converges growth stock tow to drafting machine through godet, two baths, and at it
Between carry out drawing-off, orientation formed have some strength fiber after cutting off enter villus slot.The coagulating bath includes 110g/L
Sulfuric acid, the sodium sulphate of 300g/L, the zinc sulfate of 7g/L and 10g/L 653 surfactant of Berol Spin.The acid bath
Temperature be 45 DEG C；The spinning head is made of 45 small spray cap, and each spinneret cap has 2100 holes, micropore size again
0.06mm.The spinning speed is 55m/min.Two bath includes the sulfuric acid of 30g/l, and two bath temperatures are 62 DEG C, and two baths are led
Stretching rate is 35%.The inlet steam pressure of the villus slot is 1.5bar.
(3) post-processing of viscose rayon:
The short rayon fiber suede come out from villus slot is sent into conche, washed through a washing, desulfurization, two washings, bleaching, three,
Pickling, wash, oil eventually, being dehydrated, fiber number 1.69dtex is made after baking process, length is 38mm fine without the high white viscose glue of chlorine drift
Dimension.One washing temperature is 75 DEG C, and two washing temperatures are 70 DEG C, and three washing temperatures are 65 DEG C, the whole water
Washing temperature is 70 DEG C；The desulfurizing agent that sweetening process uses is sodium hydroxide and vulcanized sodium, naoh concentration 2g/L, vulcanized sodium
Concentration is 3g/L, and desulfurization temperature is 75 DEG C；Carboxylic acid group and sulfonic poly alkyl alcohol ethers table will be contained respectively in blanching step
Bleeding agent, amides activator, the hydrogen peroxide of face bioactive agent composition are added in bleaching lye, and wherein the additive amount of bleeding agent is
0.4g/L, the additive amount of activator are 3g/L, and the additive amount of hydrogen peroxide is 12g/L；The bleaching temperature is 70 DEG C, bleaching soda
Liquid pH value is 11, bleaching time 3.3min.The sulfuric acid of 4g/L is added in acid cleaning process, the used postal agent that oils is this postal of bamboo
Agent, the oil agent addition are 3.5g/L, and the pH value of tow is 7.1 after oiling.The drying temperature is 140 DEG C, after drying,
No high white viscose rayon product of chlorine drift is obtained, product regain is controlled 13%.
The index of quality of the resulting no high white viscose rayon of chlorine drift are as follows: fiber number 1.69dtex；Length 38mm；Dry breaking strength
≥2.10cN/dtex；Dry elongation at break 19.0%~22.0%；Whiteness is 87.6%；Fault content≤1.5mg/100g；It is residual
Sulfur content≤5mg/100g；Surface-active substance≤3mm；Water solubles content≤0.6%.
Embodiment 4
(1) preparation of rayon spinning stoste: by whiteness be 89%, first fibre content is 90% without chlorine drift dissolving pulp pulp
For raw material, included dipping, squeezing, crushing, experienced, yellow, dissolution and maturation and etc. prepare rayon spinning stoste, and with two
Titanium oxide dispersion liquid is sent into spinning machine after mixing；The quality of titanium dioxide and pure water is matched in the titanium oxide dispersion
Than for 1:4；The quality proportioning of first fibre is 1.0:100 in titanium dioxide and viscose glue stoste.
(2) rayon spinning:
Spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, is reacted in acid bath groove with coagulating bath, is coagulated
Admittedly regenerating as-spun fibre；The as-spun fibre of solidification regeneration converges growth stock tow to drafting machine through godet, two baths, and at it
Between carry out drawing-off, orientation formed have some strength fiber after cutting off enter villus slot.The coagulating bath includes 110g/L
Sulfuric acid, the sodium sulphate of 300g/L, the zinc sulfate of 7g/L and 10g/L 653 surfactant of Berol Spin.The acid bath
Temperature be 45 DEG C；The spinning head is made of 45 small spray cap, and each spinneret cap has 2100 holes, micropore size again
0.06mm.The spinning speed is 45m/min.Two bath includes the sulfuric acid of 30g/l, and two bath temperatures are 60 DEG C, and two baths are led
Stretching rate is 30%.The inlet steam pressure of the villus slot is 1.4bar.
(3) post-processing of viscose rayon:
The short rayon fiber suede come out from villus slot is sent into conche, washed through a washing, desulfurization, two washings, bleaching, three,
Pickling, wash, oil eventually, being dehydrated, fiber number 1.75dtex is made after baking process, length is 40mm fine without the high white viscose glue of chlorine drift
Dimension.One washing temperature is 70 DEG C, and two washing temperatures are 60 DEG C, and three washing temperatures are 55 DEG C, the whole water
Washing temperature is 70 DEG C；The desulfurizing agent that sweetening process uses is sodium hydroxide, vulcanized sodium, naoh concentration 3g/L, vulcanized sodium
Concentration is 3g/L, and desulfurization temperature is 80 DEG C；Carboxylic acid group and sulfonic poly alkyl alcohol ethers table will be contained respectively in blanching step
Bleeding agent, amides activator, the hydrogen peroxide of face bioactive agent composition are added in bleaching lye, and wherein the additive amount of bleeding agent is
0.2g/L, the additive amount of activator are 0.6g/L, and the additive amount of hydrogen peroxide is 3g/L；The bleaching temperature is 80 DEG C, bleaching
Lye pH value is 9, bleaching time 4min.The sulfuric acid of 3g/L is added in acid cleaning process, the used postal agent that oils is this postal of bamboo
Agent, the oil agent addition are 4g/L, and the pH value of tow is 7.1 after oiling.The drying temperature is 140 DEG C, after drying, is obtained
To the high white viscose rayon product of no chlorine drift, product regain is controlled 13%.
The index of quality of the resulting no high white viscose rayon of chlorine drift are as follows: fiber number 1.75dtex；Length 40mm；Dry breaking strength
≥2.10cN/dtex；Dry elongation at break 19.0%~22.0%；Whiteness is 87.2%；Fault content≤1.5mg/100g；It is residual
Sulfur content≤5mg/100g；Surface-active substance≤3mm；Water solubles content≤0.6%.
Comparative example 1
(1) preparation of rayon spinning stoste: by whiteness be 89%, first fibre content is 90% without chlorine drift dissolving pulp pulp
For raw material, included dipping, squeezing, crushing, experienced, yellow, dissolution and maturation and etc. prepare rayon spinning stoste, and with two
Titanium oxide dispersion liquid is sent into spinning machine after mixing；The quality of titanium dioxide and pure water is matched in the titanium oxide dispersion
Than for 1:5；The quality proportioning of first fibre is 0.7:100 in titanium dioxide and viscose glue stoste.
(2) rayon spinning:
Spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, is reacted in acid bath groove with coagulating bath, is coagulated
Admittedly regenerating as-spun fibre；The as-spun fibre of solidification regeneration converges growth stock tow to drafting machine through godet, two baths, and at it
Between carry out drawing-off, orientation formed have some strength fiber after cutting off enter villus slot.The coagulating bath includes 110g/L
Sulfuric acid, the sodium sulphate of 300g/L, the zinc sulfate of 7g/L and 10g/L 653 surfactant of Berol Spin.The acid bath
Temperature be 45 DEG C；The spinning head is made of 45 small spray cap, and each spinneret cap has 2100 holes, micropore size again
0.06mm.The spinning speed is 55m/min.Two bath includes the sulfuric acid of 30g/l, and two bath temperatures are 62 DEG C, and two baths are led
Stretching rate is 35%.The inlet steam pressure of the villus slot is 1.5bar.
(3) post-processing of viscose rayon:
The short rayon fiber suede come out from villus slot is sent into conche, washed through a washing, desulfurization, two washings, bleaching, three,
Pickling, wash, oil eventually, being dehydrated, fiber number 1.69dtex is made after baking process, length is 38mm fine without the high white viscose glue of chlorine drift
Dimension.One washing temperature is 75 DEG C, and two washing temperatures are 70 DEG C, and three washing temperatures are 65 DEG C, the whole water
Washing temperature is 70 DEG C；The desulfurizing agent that sweetening process uses is sodium hydroxide and vulcanized sodium, naoh concentration 2g/L, vulcanized sodium
Concentration is 3g/L, and desulfurization temperature is 75 DEG C；Carboxylic acid group and sulfonic poly alkyl alcohol ethers table will be contained respectively in blanching step
Bleeding agent, the hydrogen peroxide of face bioactive agent composition are added in bleaching lye, and wherein the additive amount of bleeding agent is 0.4g/L, hydrogen peroxide
Additive amount be 12g/L；The bleaching temperature is 70 DEG C, and bleaching lye pH value is 11, bleaching time 3.3min.Pickling
The sulfuric acid of 4g/L is added in journey, the used postal agent that oils is this postal of bamboo agent, and the oil agent addition is 3.5g/L, silk after oiling
The pH value of beam is 7.1.The drying temperature is 140 DEG C, after drying, obtains no high white viscose rayon product of chlorine drift, and product returns
Damp rate control is 13%.
The index of quality of the resulting no high white viscose rayon of chlorine drift are as follows: fiber number 1.69dtex；Length 38mm；Dry breaking strength
≥2.0cN/dtex；Dry elongation at break 19.0%~22.0%；Whiteness is 86.4%；Fault content≤1.5mg/100g；It is residual
Sulfur content≤5mg/100g；Surface-active substance≤3mm；Water solubles content≤0.6%.
Comparative example 2
(1) preparation of rayon spinning stoste: by whiteness be 89%, first fibre content is 90% without chlorine drift dissolving pulp pulp
For raw material, included dipping, squeezing, crushing, experienced, yellow, dissolution and maturation and etc. prepare rayon spinning stoste, and with two
Titanium oxide dispersion liquid is sent into spinning machine after mixing；The quality of titanium dioxide and pure water is matched in the titanium oxide dispersion
Than for 1:5；The quality proportioning of first fibre is 0.7:100 in titanium dioxide and viscose glue stoste.
(2) rayon spinning:
Spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, is reacted in acid bath groove with coagulating bath, is coagulated
Admittedly regenerating as-spun fibre；The as-spun fibre of solidification regeneration converges growth stock tow to drafting machine through godet, two baths, and at it
Between carry out drawing-off, orientation formed have some strength fiber after cutting off enter villus slot.The coagulating bath includes 110g/L
Sulfuric acid, the sodium sulphate of 300g/L, the zinc sulfate of 7g/L and 10g/L 653 surfactant of Berol Spin.The acid bath
Temperature be 45 DEG C；The spinning head is made of 45 small spray cap, and each spinneret cap has 2100 holes, micropore size again
0.06mm.The spinning speed is 55m/min.Two bath includes the sulfuric acid of 30g/l, and two bath temperatures are 62 DEG C, and two baths are led
Stretching rate is 35%.The inlet steam pressure of the villus slot is 1.5bar.
(3) post-processing of viscose rayon:
The short rayon fiber suede come out from villus slot is sent into conche, washed through a washing, desulfurization, two washings, bleaching, three,
Pickling, wash, oil eventually, being dehydrated, fiber number 1.69dtex is made after baking process, length is 38mm fine without the high white viscose glue of chlorine drift
Dimension.One washing temperature is 75 DEG C, and two washing temperatures are 70 DEG C, and three washing temperatures are 65 DEG C, the whole water
Washing temperature is 70 DEG C；The desulfurizing agent that sweetening process uses is sodium hydroxide and vulcanized sodium, naoh concentration 2g/L, vulcanized sodium
Concentration is 3g/L, and desulfurization temperature is 75 DEG C；Amides activator, hydrogen peroxide are added to bleaching lye respectively in blanching step
In, wherein the additive amount of activator is 3g/L, and the additive amount of hydrogen peroxide is 12g/L；The bleaching temperature is 70 DEG C, bleaching soda
Liquid pH value is 11, bleaching time 3.3min.The sulfuric acid of 4g/L is added in acid cleaning process, the used postal agent that oils is this postal of bamboo
Agent, the oil agent addition are 3.5g/L, and the pH value of tow is 7.1 after oiling.The drying temperature is 140 DEG C, after drying,
No high white viscose rayon product of chlorine drift is obtained, product regain is controlled 13%.
The index of quality of the resulting no high white viscose rayon of chlorine drift are as follows: fiber number 1.69dtex；Length 38mm；Dry breaking strength
≥2.10cN/dtex；Dry elongation at break 19.0%~22.0%；Whiteness is 86.8%；Fault content≤1.5mg/100g；It is residual
Sulfur content≤5mg/100g；Surface-active substance≤3mm；Water solubles content≤0.6%.
In terms of the performance of product, the whiteness in embodiment 1-4 is above comparative example.Compared with Example 3, comparative example 1 does not have
Have using activator, fibre whiteness is lower, and it is also lower to do breaking strength, though activator is added in comparative example 2, seeps without being added
Saturating agent, fibre whiteness are more lower.
Claims (9)
1. a kind of preparation method of the no high white viscose rayon of chlorine drift, which comprises the following steps:
(1) preparation of rayon spinning stoste:
Selecting no chlorine drift dissolving pulp pulp be raw material, successively through including dipping, squeezing, crushing, experienced, yellow, dissolution and ripe
Rayon spinning stoste is prepared at step, and is sent into spinning machine after mixing with titanium oxide dispersion；The titanium dioxide
The quality proportioning of titanium dioxide and pure water is 1:4~1:5 in dispersion liquid；The quality proportioning of first fibre in titanium dioxide and viscose glue stoste
For 0.5:100~1.0:100；
(2) rayon spinning:
Mixed spinning solution is sent to spinning machine, is sprayed by metering pump by spinning head, anti-with coagulating bath in acid bath groove
It answers, solidification regeneration goes out as-spun fibre；The as-spun fibre of solidification regeneration forms the fiber with some strength through cutting through drawing-off, orientation
It has no progeny and enters villus slot；Being broken up fiber by the steam bubble that villus trench bottom steam pipe aperture sprays keeps fiber layer thickness equal
One；
(3) post-processing of viscose rayon:
From villus slot come out short rayon fiber suede be sent into conche, through a washing, desulfurization, two washings, bleaching, three washings, pickling,
It washes, oil eventually, being dehydrated, being made after baking process without the high white viscose rayon of chlorine drift.
2. a kind of preparation method of no high white viscose rayon of chlorine drift according to claim 1, which is characterized in that step (1)
Described in without chlorine drift dissolving pulp pulp whiteness be 89% or more, first fibre content is 90% or more.
3. a kind of preparation method of no high white viscose rayon of chlorine drift according to claim 1, which is characterized in that step (2)
Described in spinning machine spinning speed be 45~60m/min.
4. a kind of preparation method of no high white viscose rayon of chlorine drift according to claim 1, which is characterized in that step (3)
Described in the desulfurizing agent that uses of sweetening process be one or both of sodium hydroxide, vulcanized sodium, desulfurizing agent concentration 2~
5g/L, desulfurization temperature are 65~80 DEG C.
5. a kind of preparation method of no high white viscose rayon of chlorine drift according to claim 1, which is characterized in that step (3)
Described in a washing temperature be 70~75 DEG C, two washing temperatures be 60~80 DEG C, three washing temperatures be 55~70 DEG C,
The whole washing temperature is 70~75 DEG C.
6. a kind of preparation method of no high white viscose rayon of chlorine drift according to claim 1, which is characterized in that step (3)
Described in the bleaching agent that uses of bleaching process be hydrogen peroxide, additive amount is 3~16g/L；Bleaching process uses activator and infiltration
Saturating agent aid, wherein the additive amount of activator is 0.6~4g/L, and the additive amount of bleeding agent is 0.2~1g/L；The bleaching temperature
Degree is 60~80 DEG C, and for the control of bleaching liquid pH value 9~12, bleaching time is 3~4min.
7. a kind of preparation method of no high white viscose rayon of chlorine drift according to claim 6, which is characterized in that step (3)
The activator is amides compound.
8. a kind of preparation method of no high white viscose rayon of chlorine drift according to claim 6, which is characterized in that step (3)
Described in bleeding agent be ingredient in contain carboxylic acid group and sulfonic poly alkyl alcohol ethers surfactant.
9. a kind of no high white viscose rayon of chlorine drift, which is characterized in that prepare gained by any one of claims 1 to 8 method.
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| CN111058185A (en) * | 2019-12-05 | 2020-04-24 | 湖北拓盈新材料有限公司 | High-strength viscose non-woven fabric and preparation method thereof |
| CN112522817A (en) * | 2020-12-04 | 2021-03-19 | 宜宾丝丽雅股份有限公司 | Production process of odorless viscose fiber |
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| CN112575403A (en) * | 2020-12-29 | 2021-03-30 | 新疆中泰纺织集团有限公司 | Clean high-whiteness extinction viscose fiber and preparation method thereof |
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| CN114197210A (en) * | 2021-12-21 | 2022-03-18 | 赛得利（福建）纤维有限公司 | Hydrophobically modified viscose fiber and preparation method thereof |
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| CN114197210B (en) * | 2021-12-21 | 2024-03-19 | 赛得利（福建）纤维有限公司 | Hydrophobically modified viscose fiber and preparation method thereof |
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