DE2110843C3 - 09.09.70 Japan 79168-70 Process for the production of viscose rayon fibers with a high wet modulus and a high degree of crimp - Google Patents

Description

»Ethogenation product,

hydro »«! or water kdiche.ZWk _{"module-described} ^ D * ™" _{of viscose} _

Cadmium-, lead- and / or Ek- (II), "", " .Method * Knäuselung as the

Links, . rayon fibers with noc _d mentioned

alsModificatorenzug.bt, ASbA water and after drying

the viscose obtained up to a value 3 <> ^ ^au « ^e ratio: If one s, e on

Jon 37 to 49 and a Hottenroth Re.fe J <> _{round lay} , denier and length of the

from "10 to 20 with the proviso on the right. Let, * £" _{I show a} fiber with a number

that the Hottenroth number with increasing hot ^ a _{Kraus Elun} ⁶ ienroth maturity gene in water of about 20/100 mm from the maximum value to the _ferry of twice as many Krause

Number 1 or less, and with decreasing 35 after ^ irb the _{number of crimps after} that

_WIC htspr _O zentZnSO ₄ contains _ä U, nn vers _{P1, viscosefasem} Clearly their Wi-

While various methods _d d as a result of this the

"SSSSgiS. During different procedures

45 not ^bet . ^r ';°' _{have been} ^g and as a result, the

The present invention relates to a method ^v _w X ^ _an | _sfahigke i _t of Viscosereyon against

! for the production of viscose rayon fibers with high vv _was improved, but occurred as an accompanying

NaßmoduShigh degree of ripple, under Xa- Wa sosehr ^ ^ ^ Krt ^ baAjt ^

thoeenierune of alkalized cellulose, addition of *. Improve resistance

ModmkaTrln to the resultant viscose, the anschhe- 50 ™ _d ^ _enüber water from viscose in strong overall

K-loop fibers, in which one has a modifier " ^a ™ hilft _ie " _{2, which is} available, strongly

msan? meT with a fink connection containing ^ _s S ™ ^m vi _SCOS ereyon not yet sufficient

? SS ^ i a salt value of 3.14 ^ spinn, 4. lj ™ ^S ^ _{n (soluble} , i, " _egg gcn water and <« * «Τ * £

obtained fibers by at least 50 / ._ " κ " corners, ^ ^ ^ ^ _- Ba ₁ if e _S in em tissue

Viscose rayon fibers through

from

20th

The object of the present invention was therefore to provide a process for the production of viscose rayon fibers with a very high wet modulus, a resistance to water comparable to that of cotton and, at the same time, excellent . To create curling properties. As already stated above, such fibers clearly differ from normal and high-strength viscose rayon fibers.

This object has now been achieved by a method described at the beginning with the characteristic that one

a) alkali cellulose with 24 to 32 percent by weight CS ₂ , based on cellulose, xanthated,

b) the xanthogenic product

a) 1 to 10 percent by weight, based on the metal and cellulose, zinc, cadmium, lead and / or iron (II) compounds soluble in sodium hydroxide or water,

ß) 0.5 to 10 percent by weight, based on cellulose, polymers and / or copolymers of alkylene oxides and

γ) 1 to 10 percent by weight, based on cellulose, of an alkylene oxide derivative of a di- or polyamine

admits as modifiers,

c) the viscose obtained up to a y value of 37 to 49 and a Hottenroth ripeness of 10 Can ripen up to 20 with the proviso that the HoHenroth number with increasing Hottenroth ripeness from the maximum value by the number 1 or less, and with decreasing Hottenroth maturity from Maximum value around the number 7 or less, differs, and

d) that one ^f the ripened viscose into a bath from pivoting elsäure Suifat-type containing 1 to 10 percent by weight of ZnSO _4, is spun.

It was thus developed within the scope of the present invention, a highly curled fiber that has a 5% N.M., which is comparable to or even superior to cotton (if one is on the same Denier basis compares).

If the cross-section of the fiber obtained according to the invention is dyed in the usual manner in the edge zone, it can be seen from FIG. 1 that the fiber edge zone or fiber skin is thin on one side and thick on the opposite side. Therefore, the cross-section is highly morphologically asymmetrical. Because of this cross-sectional shape, the fiber has an excellent tendency to curl. The 5 ⁿ / o NM of the fiber is comparable to or superior to that of cotton (with the same denier), and furthermore the fiber does not tend to form fibrils. The fiber also has high strength and sufficient elongation. Accordingly, when used for woven or knitted fabrics, blankets, carpets, non-woven fabrics, cotton sanitary substitutes, etc., it exhibits excellent performance.

The invention is further described in detail. the

Figs. 1 and 2 show enlarged cross-sections of fibers whose edge zone is colored, where F i g. 1 represents the cross-section as it is according to the present invention Invention receives;

Fig. 2 is a cross-sectional view of a highly frizzy viscose fiber available on the market;

F i g. 3 shows in a diagram the relationship between the Hottenroth number and the maturation or aging time;

F i g. Fig. 4 shows in a diagram the ratio of wet cell to denier of the fiber during

F i g. 5 shows in the diagram the ratio of the number of crimps to the denier of the fiber.

The change in H. Z. as a function of the ripening time of the viscose obtained according to the invention is through the curve shown, for example, in FIG. 3 is present. The following as "according to the conditions" designated »H. Z. «means such a H. Z., which lies on the rising part of the curve and differs in value from the maximum number by one unit or less and one such H. Z., which lies on the sloping part of the curve and differs from the maximum number in value 7 units or less differs.

The amount of carbon disulfide added for xanthation is 24 to 22 percent by weight, preferably 26 to 30 percent by weight, based on the weight of the cellulose. In example 12 it is shown that when the amount of carbon disulfide exceeds 30% by weight, the number of Crimps begin to decrease and when an amount of 32 percent by weight is exceeded the severely crimped fiber of the present invention cannot be achieved.

As the first group modifiers to be added to the xanthate product are any Compounds selected from zinc compounds, cadmium compounds, lead compounds and Iron (II) compounds, effective as long as they are soluble and suitable in water or an alkali Viscose in an amount of 1 or more percent by weight, based on the weight of cellulose and the Weight of elemental metal in the corresponding metal compound to be added. Examples more effective compounds are: sodium zincate, zinc sulfate, lead oxide, cadmium acetate, iron (II) sulfate, Zinc oxide, zinc hydroxide, zinc acetate, cadmium sulfate, cadmium chloride, cadmium nitrate, Iron (II) chloride, lead nitrate, etc. The amount to be added is in the range from 1 to 10, preferably in Range from 2 to 6 percent by weight calculated as the weight of the elemental metal and based on the cellulose weight. If two or more compounds are to be added, the total should be 1 to 10 percent by weight, preferably 2 to 6 percent by weight. If the modifier is added to the first group in an amount which is outside the specified range hardly e'nc sufficient, combined effect with the modifiers of the second and third group to the extent that one would expect a highly curled fiber with improved toughness compared to water. The modifier is preferably added after the xanthation has ended.

The modifiers of the second group are polymers or copolymers of alkylene oxides, and they include, for example, polyethylene glycol (PAG), polypropylene glycol (PPG), copolymers of ethylene oxide, propylene oxide and the like. The amount to be added is in the range of 0.5 to IO percent by weight, preferably 1 to 7 percent by weight

percent, based on the Cdlulose weight. When two or more compounds are to be added, the total amount should be 0.5 to 10 percent by weight, preferably 1 to 7 percent by weight.

The third group modifiers are alkylene oxide derivatives of diamines and polyamines including, for example, an amine derivative that is known as obtained by implementation from:

- 1 mole of ethylenediamine with

4 moles of ethylene oxide (ADA + 4 AO);

- 1 mole of diethylenetriamirii with

5 moles of propylene oxide (DATA + 5 PO);

- 1 mole of diethylenetriamine with

5 moles of ethylene oxide (DATA + 5 AO);

- 1 mol pentaethylene hexamine with

6 moles of ethylene oxide (PAHA + 6 AO);

- 1 mole of ethylenediamine with

4 moles of propylene oxide (ADA -I- 4PO);

- 1 mole of ethylenediamine with 4 moles of ethylene oxide and

2 moles of propylene oxide (ADA + 4 AO + 2PO);

- 1 mole of p-xylylenediamine with

4 moles of ethylene oxide (p-XDA + 4 AO)

- 1 mole of ethylenediamine with 1 mole of ethylene oxide and

3 moles of propylene oxide (ADA + 1 AO + 3PO);

- 1 mole of propylenediamine with

4 moles of ethylene oxide (PDA + 4 AO) etc.

The amount of modification added is 1 to 10 percent by weight, preferably 2 to 5 percent by weight, based on the weight of the cellulose. If two or more compounds are to be added, the total amount should be 1 to 10 percent by weight, preferably 2 to 5 percent by weight.

In the present invention, the addition of a comb ^; Of course, at least one compound from each of the three groups of modifiers, namely the first group, the second group and the third group, is required, since otherwise the tendency to curl, the 5% NM and the strength of the fiber are impaired.

Viscosities of the viscose in the range from 50 to 500 seconds, measured by means of the falling ball method, are suitable for spinning, while viscosities higher than 500 seconds are disadvantageous in terms of spinning technology and for economic reasons. The necessary conditions of the viscose for spinning are a j value in the range from 49 to 37 and a maturity in the form of a HZ from 20 to 10, provided, however, that the HZ is conditional; otherwise, high crimp cannot be achieved. It should be noted that the ripeness, which corresponds to the specified conditional HZ, cannot be determined by measuring the salt point. For example, as shown in Example 5, all HZ at points / 1, B and C (FIG. 3) are in the range from 20 to 10, but the HZ at point C does not correspond to

ίο requirements of the conditional H. Z. Therefore, when the viscose is spun at point C, the crimp of the obtained fiber is remarkable disturbed.

The spinning speed is preferably less than 80 m / min. In order to prevent the formation of abnormal fibers avoid.

While the concentrations of sulfuric acid and sodium sulfate in the first spinning bath vary mainly according to the composition of the viscose, the preferred concentrations in a viscose of the usual economic composition are 3 to 8 percent by weight for sulfuric acid and 5 to 20 percent by weight for sodium sulfate. The concentration of zinc sulfate in the first spinning bath is 1 to 10 percent by weight, preferably 2 to 5 percent by weight. When the concentration of zinc sulfate is less than 1 ⁰ Zo, the fiber of the present invention, according to not be obtained. Again, higher concentrations are uneconomical because the increased amount of zinc sulfate is taken up by the fiber leaving the bath. The temperature of the bath is preferably 20 to 50 ° C. for reasons of heat economy, the immersion length is preferably greater than 10 cm.

In the second bath, the concentration of sulfuric acid is 0.1 to 12 percent by weight, zinc sulfate 0 to 10 percent by weight and sodium sulfate 0 to 15 percent by weight and the temperature is 70 to 100 ^° C., these conditions being the same as in the conventional processes. In this bath, the threads are drawn and regenerated and then washed and dried in the usual way.

According to the present procedure, the

♦ 5 has been described in detail, viscose rayon fibers, with the 5% N.M. and a curl number in the ranges given in Table I. can be obtained. F i g. 4 and 5 show the range given in Table I in the form of a diagram again. F i g. Fig. 4 shows the relationship between the denier and the 5% N.M. Fig. 5 shows this Relationship between denier and number of crimps after drying.

Table I.

1.5 denier

3 denier

6 denier

10 denier

5% N.M. g / den 0.7 to 1.2 0.6 to 0.9 0.55 up to 0.7 0.5 to 0.65 Number of crimps after 13 to 24 11 to 21 7 to 15th 5 to 11 drying N.Z./25 mm

Compared to the fiber of this invention, 65 has the number of crimps in water from 12 to 25 /

the 1.5 denier fiber in the above-mentioned application 100 mm (which corresponds to a number of crimps

dung P 19 26 506.6 at 1.0 to 1.5 g / which corresponds to a height of 6 to 12/25 mm). Although

rcn 5 ⁿ / [iigen NM, but a much lower one in Table I the properties of fibers from

1.5 to 10 denier are given, it is of course possible to use threads thinner than 1.5 denier or to produce thicker than 10 denier. In the latter two cases, follow the procedure given in Table I. Results predict that the 5% N.M. and the number of crimps in that Measures increase as the denier decreases and, conversely, the 5% N.M. and the number of crimps decrease as the denier is increased.

Thus, various types of fabrics can be made using the fibers of the present invention including woven fabrics, knitwear, blankets, carpets, cotton substitutes for sanitary purposes, etc., which looks at their resistance to water, Dimensional stability or dimensional stability, resilience, service life and handling, are excellent.

The invention is further illustrated by the following examples, the embodiments described therein are not intended to limit the scope of the invention in any way. In the examples all percentages are based on weight. , 5

example 1

A wood pulp having a degree of polymerization of about 800 was soaked in a 17.5 ° / o of sodium hydroxide for 60 minutes at 20 ⁰ C, down to the 2.7-fold weight of the air dried pulp squeezed and crushed at 20 to 53 ° C for 60 minutes. 29 Vo of carbon disulfide, based on the weight of the cellulose in the alkali cellulose, were added to the alkali cellulose obtained in this way, and the xanthation was carried out at 20 to 26 ° C. for 150 minutes. 5% (calculated as zinc) zinc oxide, dissolved in sodium hydroxide, 3% (DATA + 5 PO), 2% PAE with a molecular weight of 1000, a sodium hydroxide solution and water were added to the mass obtained, based on the cellulose the resolution

effected at 15 ° C for 3 hours. One received a viscose containing 6.9% cellulose and 6.1% alkali contained. The viscosity, measured by the falling ball method, was 240 seconds. The viscose was filtered, deaerated and then brought to a maturity at 15 ° C that a y value of 47 and a conditional H.Z. of 16 was reached. The determination of the y-value and the conditional H.Z. was carried out in such a way that samples were taken at certain time intervals and the values for the withdrawal times. The y-value of 47 and the conditional H.Z. of 16 were reached here after a maturation time of 20 hours. Then the viscose was spun from one A nozzle with 1500 holes, each 0.07 mm in diameter, at a spinning speed from 30 m / sec. in a first spinning bath at 35 ° C, the 5% sulfuric acid, 13% sodium sulfate and contained 2.6% zinc sulfate. The threads were in a second bath containing 3% sulfuric acid contained, stretched at 96 ° C to 130%. After that the filaments were washed and usually dried to form fiber A. In a similar one Way, but using 5% zinc oxide dissolved in sodium hydroxide and 2% PAE with having a molecular weight of 1000 as a modifier, a viscose was obtained which was similarly prepared spun, drawn, washed and dried to form fiber B. In a similar way fiber C was obtained, for which 3% (DATA + 5 PO) and 2% PÄG with a molecular weight of 1000 and the fiber D, for which one 5 ° / o (calculated as zinc) zinc oxide dissolved in sodium hydroxide and 3% (DATA + 5 PO) used (all percentages based on cellulose). The properties The properties of this fiber are shown in Table II below, for comparison purposes of a highly curled, commercially available rayon. The F i g. 1 and 2 show the enlarged Cross-sections of fiber A and a commercially available highly curled rayon, where the fibers were dyed in the usual way in the edge zone.

Table II

Denier number

Dry strength, g / den
Dry elongation, ° / o
Wet strength, g / den
Wet elongation,%
Knot strength, g / den
5% NM, g / den

Number of crimps
per 25 mm

V *) = Commercially strongly curled rayon.

. . ₀ 65 of a nozzle with 1200 holes, each with 0.10 mm

Example / diameter, with a spinning speed of

The same viscose, as in Example 1 at Her- 25 m / min, in a first spinning bath at 35 ° C.

"A RECOVERY of the fiber was used, was from NEN, the 5.1 ° / o sulfuric acid, 8.5 ^e / o sodium sulfate

509685/183

3 3 3 3 3 4.2 2.0 3.5 3.7 2.5 13th 9 20th 16 21 3.0 1.8 2.6 2.2 1.5 15th 11th 21 18th 25th 2.0 1.5 1.8 2.0 1.4 0.85 0.50 0.40 0.50 0.30 12th 7th 6th 8th 13th

and 2.7% zinc sulfate and the filaments were in the second bath, which contained 5% sulfuric acid, 0.5% sodium sulphate and 1% zinc sulphate, at 95 ° C stretched to 115%. The threads were then washed and dried in the usual manner to form a fiber with the following properties:

Denier 6

Dry strength, g / den 4.0

Dry elongation,% 15

Wet strength, g / den 2.7

Wet elongation, ° / o 17

Knot strength, g / den 1.6

5% N.M., g / den 0.7

Number of crimps per 25 mm .. 9

Example 3

The same viscose as used in Example 1 for production fiber A was used was made from a nozzle with 1200 holes, each 0.13 mm in diameter, at a spinning speed of 20 m / min. in a first spinning bath at 35 ° C with a · - Fm dip length spun from 80 cm, the spinning bath 5.3% sulfuric acid, 9.5% sodium sulfate and Contained 2.6% zinc sulphate. The threads were then in the same second bath as in Example 2 was used, stretched to 105%. Thereafter, the threads were washed and dried to form a fiber, the properties of which are set out in Table III below. These values For comparison purposes, the properties of a commercially available, heavily crimped Reyon thread juxtaposed.

Table III

Viscose thread comparison Example 3 thread

Denier 10
Dry strength, g / den 3.6

Dry elongation,% 15
Wet strength, g / den 2.3

Wet elongation, ° / o 17
Knot strength, g / den 1.4

5% N.M., g / den 0.61

Number of crimps 7
per 25 mm

Example 4

15th

2.0
20th

1.1
28

1.0

0.25

The same viscose as used in Example 1 to produce fiber A was fed from a nozzle with 1500 holes, each with a diameter of 0.05 mm at a spinning speed of 32 m / min, into a first spinning bath at 36 ° C spun, this containing 4.4% sulfuric acid, 11% sodium sulfate and 2.9% zinc sulfate. The filaments were drawn in the second bath containing 1 ° / o sulfuric acid at 97 ° C at 140%. They were then washed and cleaned in the usual way.

dries. The fiber obtained had the following properties:

Denier 1.5

Dry strength, g / den 4.7

Dry elongation,% 12

Wet strength, g / den 3.4

Wet elongation,% 14

Knot strength, g / den 2.4

5% N.M., g / den 1.0

Number of crimps per 25 mm .. 14

Example 5

To the alkali cellulose obtained in the same manner as in Example 1 was added 27% carbon disulfide based on the weight of cellulose in the alkali cellulose, and xanthation was carried out at 20 to 25 ° C for 160 minutes long carried out. 4.8% sodium zincate, 2.9% (ADA + 4 PO), 2% PPG with a molecular weight of 400, an aqueous solution of sodium hydroxide and water were added to the mass obtained.

Dissolution was effected at 20 ° C. for 3 hours to form a viscose containing 7% cellulose and Contained 6% alkali. The viscose was filtered, deaerated and then brought to maturity. The H.Z. would as a function of aging with the formation of a

gramms, as in Fig. 3 shown, measured. Of the three types of viscose at points A, B and C , each viscose at points A and B had an HZ that was in the range of 20 to 10 and, accordingly, the requirements of the conditional

ßen HZ, while the Viscose at points had an HZ that is in the range of 20 to 10, but does not meet the requirements of the conditional HZ. The - / - values of the viscose at A, B and C were 43 and 45 and 46, respectively.

Each of the viscose types at points A, B and C were spun into the first spinning bath at 36 ° C, the spinning bath containing 4.3% sulfuric acid, 11% sodium sulfate and 3% zinc sulfate. The threads were 120% in the same second bath as

stretched in example 4. The threads were then washed and dried in the usual manner. The fibers A, B and C were obtained from the viscose kinds of the items A, B and C. The properties of each fiber are shown in Table IV below.

to take.

Table IV

Denier 3 3 3

Dry strength, 4.0 4.1 4.4

g / den

Dry elongation,% 15 13 11

Wet Strength, g / den 2.8 3.0 3.2

Wet elongation,% - 18 15 13
Knot strength, 2.2 1.9 2.0

& ^the

5% N.M., G / den 0.60 0.75 0.85

Number of frills 17 13 8

lungs per 25 mm

Example 6

A viscose was prepared in the same manner as the viscose in Item A in Example 5. The viscose of this example was spun from a nozzle with 1200 holes, each with a diameter of 0.10 mm, at a spinning speed of 24 m / min. Into the first bath at 34 ° C, the bath being 4.7% sulfuric acid, 12.1% sodium sulfate and 2.6%. Contained zinc sulfate. The threads were drawn to 110% in the same second bath as in Example 2. The threads were then washed and dried in the usual manner to produce a fiber which had the following properties:

Denier 6

Dry strength, g / den 3.8

Dry elongation,% 16

Wet strength, g / den 2.6

Wet elongation, ° / o 19

Knot strength, g / den 1.6

5% N.M., g / den 0.56

Number of crimps per 25 mm .. 14

Example 7

A viscose was prepared in the same manner as the viscose at item A in Example 5. This viscose was poured from a nozzle block with 1200 holes, each with a diameter of 0.13 mm, into the first spinning bath, which contained 5.2% sulfuric acid, 11% sodium sulphate and 3% zinc sulphate, at 35 ° C. with a Single length of 80 cm and spinning at a spinning speed of 20 m / min. The filaments were then drawn to 95% in the same second bath as in Example 2 at 95 ° C. and then washed and dried in the usual manner to form a fiber which had the following properties:

Denier 10

Dry strength, g / den 3.3

Dry elongation, ° / o 17

Wet strength, g / den 2.1

Wet elongation,% 20

Knot strength, g / den 1.6

5% N.M., g / den 0.50

Number of crimps per 25 mm .. 11

Example 8

A viscose was produced in the same manner as the viscose at item Λ in Example 5. The viscose was contained from a nozzle having 1500 holes, each 0.05 mm in diameter, in the first spinning bath containing 4.2 ⁰ A sulfuric acid, 12.5% sodium sulphate and 2.6 o / o zinc sulfate, at 33 ° C and spun at a spinning speed of 32 m / min. The threads were drawn to 130% in the same second bath as in Example 4 and then washed and dried in the usual manner to form a fiber with the following properties:

Denier 1.5

Dry strength, g / den 4.6

Dry elongation,%> 16

Wet strength, g / den 3.3

Wet elongation,% 19

Knot strength, g / den 2.4

5% N.M., g / den 0.7

Number of crimps per 25 mm .. 21

Example 9

The alkali cellulose, which was obtained in the same manner as in Example 1, was xanthogenized with 29% carbon disulfide based on the weight of cellulose in the alkali cellulose at 20 to 30 ° C. for 120 minutes. Then 5% cadmium acetate, 3% (ADA + 1 AO + 3PO), 2% PPG with a molecular weight of 400, an aqueous sodium hydroxide solution and water were added; dissolution was effected at 17 ° C. for 3 hours to give a viscose containing 7% cellulose and 6% alkali. The viscose was filtered, deaerated and matured until a y value of 44 and a conditional HZ of 14.6 was reached. The viscose was contained from a nozzle having 1500 holes, each 0.06 mm in diameter in the first spin bath, the 4.4 ° / o sulfuric acid, 9.7% sodium sulfate and 2.9% zinc sulfate, at 35 ⁰ C and a spinning speed of 30 m / min. The filaments were drawn to 120% in the second bath, which contained 2% sulfuric acid, at 95 ° C. and then washed and dried in the usual manner, a fiber having the following properties being obtained:

Denier 2.5

Dry strength, 3.9 g / den

Dry elongation,% 13

Wet strength, g / den 2.7

Wet elongation,% 15

Knot strength, g / den 1.9

5 ° oiger N.M., g / den 0.65

Number of crimps per 25 mm .. 16

Example 10

That obtained in the same manner as in Example 1 Alkali cellulose was in 30% carbon disulfide, based on the cellulose weight in the alkali cellulose, xanthated at 20 to 30 ° C for 120 minutes. Then 4.9% (calculated as Lead) lead oxide, dissolved in the sodium hydroxide solution,

3.1% (ADA + 4 AO), 2% PÄG (all percentages based on cellulose), an aqueous solution of sodium hydroxide and water are added. The resolution was effected at 16 ° C for 3 hours to form a viscose containing 7% cellulose and Contained 6% alkali. The viscose was filtered, deaerated and then matured until the j-value is 45 and a conditional H.Z. of 12 have been achieved. This viscose was made from a nozzle with 1500 holes, each with a diameter of 0.06 mm, in the first spinning bath, which contained 4.8% sulfuric acid, 9.5% sodium sulphate and 3.1 <> / o zinc sulphate, at 36 ° C and a spinning speed of 30 m / mm. spun. The threads were in the second

21 ⁵ IO 843 ° [

13 14

Bath. which contained 3% sulfuric acid, hot 96 ° C on example 12

125% stretched and then in the usual way ge, ..-., · · - τ, - · ,,. ,

washing and drying. A fiber was obtained with the die obtained in the same manner as in Example 1.

the following properties: tene AlkaUcellulose was made with 29% carbon disulfide

5 stoS, based on the cellulose weight in the alkali

Denier,. 2.5 cellulose, at 20 to 3Q ° C 120 minutes long xahtho-

Dry strength, g / den 4.0 embarrassed. 5% zinc acetate, 2.8 * / o

Dry elongation,%. 14 (DATA + 5 AO), 1.9 / * PAG, an aqueous Na-

N «« f «ility ../den 2 8 triumhydnwäälösiing and water added. the

x, o ^ u, -c κ »Dissolution was effected for 3 hours at 20 ° C, where-

Wet elongation,% 15 _{obtained through mw eme viscose} , the 7% cellulose

Knot strength, g / den 2.0 _nd 6% alkali containing Viscose was then fil

5% N.M., g / den 0.70 trated, vented and brought to maturity until a y value

Number of crimps per 25 mm .. 14 of 45 and a conditional UZ of 14

15 were achieved. Then the viscose became a

Example 11 SI _se jt _m 1200Löchern, each having a through-the in the same manner as in Example 1, of 0.13 mm had conservation knife, in the first spin bath tene alkali cellulose was 29% disulphide 4.4% Sulfuric acid, 9.7% sodium sulphate and 3.1% substance, based on the cellulose weight in the alkali zinc sulphate contained, at 34 C and a spun cellulose, at 20 to 30 ° C for 120 minutes xantho- ao speed of 20 m / Mm , spun. The Fageniert. Then 4.8% iron (II) chloride was added to this, which was added to the second bath, which contained 5% sulfur-3% (ADA + 4 PO) 2% PAG, an aqueous aqueous acid 96 ° C stretched to 105%. Datrium hydroxide solution and water were added. The filaments were then washed in the usual way with BiI dissolution, washed at 18 ° C. for 3 hours with formation of the fiber A and dried. The effects of a viscose containing 7% cellulose and 25 fibers B and C were made in the same way as 6% alkali. The viscose was filtered, as described above, except that it was ventilated and then matured until a y value of 46 and the xanthogenation 31 and 36Vo carbon disulphides a conditional HZ of 15 were reached. fabric were used. The properties of this The viscose was then from a nozzle with fibers are listed in Table V below - 1500 holes, each with a diameter of 30 shows.
0.06 mm, into the first spinning bath, which contains 4.3% sulfuric acid, 14.5% sodium sulphate and 2.5% zinc sulphate Table V

contained, at 35 ° C and a spinning speed 7 Γ ~

from 30 m / min, spun. The threads were in

stretched to 130% in the second bath at 96 ° C, 35

this being 3% sulfuric acid, 1% sodium sulfate carbon disulfide,% 29 31 36

and contained 2% zinc sulfate. After that the fä- '.

the washed and dried in the usual way and with a spinning time of 14 1/28

ter formation of a fiber with the following inherent denier 10 10 10

^{Properties: 40} dry strength, g / den 3.5 3.5 2.1

Denier 2.5 dry elongation,% 16 15 17

Dry strength, g / den 4.0 _XT ", .., .. ,, - ~ ~,, τ

Dry _{elongation Μ 12} wet strength, g / den 2.2 2.3 1.2

Wet Strength, g / den 3.0 45 Wet Elongation,% 17 16 18

Wet Elongation,% 13 Knot Strength, g / den 1.4 1.3 1.4

Knot strength, g / den 1.9 5% N.M., g / den 0.50 0.55 0.45

5% N.M., g / den 0.80 number of crimps 9 7 3

Number of crimps per 25 mm ..13 50 per 25 mm

1 sheet of drawings

Claims (1)

Q. _{5 to 10%} cellulose, 5 b O \ best 0 05% poly (oxyethylene) glycol . _{5 to lO} '/ o cellulose, 5 to 10 "/" sodium \ b 0 05 ° / Pl (xyathylen) glycol at Ellung, «er Χ» * ° ^ 'ί. ™ & "" η "r i" as is well known wm