CN1294226A - Application of fibrous cativo root - Google Patents

Abstract

An application of Katiwogen L in making cellophane features that said Katiwogen L as additive (0.003-1 Wt.%) is added to the settling acidic both to decrease the surface tension of said bath, resulting in high stability and quality of cellophase.

Description

Use of linear cativo roots

The invention relates to an application of a cartiovorous L, belonging to the technical field of application of the cartiovorous L in a cellophane forming process.

The glass paper is one kind of viscose fiber, which is produced with α -cellulose-rich cotton pulp, through alkalization, yellowing, ripening to produce viscose, solidification, regeneration, desulfurization, stoving and other steps.

The viscose glue consists of cellulose xanthate, sodium hydroxide, water and the like, the existing forming coagulating acid bath consists of sulfuric acid, sodium sulfate, water and the like, and the main chemical reactions in the forming process are as follows:

(cellulose xanthate)

In addition, there are many side reactions, such as:

among them, sulfides, polysulfides, etc. are reaction by-products generated during the viscose manufacturing process. The acid bath may be turbid due to the colloidal sulfur and the like generated by the side reaction of solidification and molding, and if the acid bath is deposited on the nozzle, the lower guide roller and the like, paper defects such as a paper guide and even broken ends of the spun paper are easily caused, thereby deteriorating the molding conditions.

It follows that the factors influencing the solidification molding are very many. Assuming that R is the reaction speed of chemistry and physical chemistry, and D is the diffusion speed of various reagents in the coagulating acid bath to the cellulose inner layer, if D is more than R, namely the diffusion speed of acid to the fiber inner layer is more than the chemical reaction speed, the formed fiber inner and outer structures are uniform, but the conditions cannot be achieved at all in practical production, on the contrary, the fiber inner and outer structures are formed under the condition that D is less than R, because the surface layer of xanthate is firstly coagulated and decomposed when viscose sprayed from a nozzle contacts the coagulating acid bath, and the viscose core layer is still in a gel state, therefore, in general, the forming conditions of the fiber are improved and the physical and mechanical properties of the fiber are improved by changing the forming coagulating acid bath composition, adjusting the temperature of the coagulating acid bath, the length of an immersion bath, the coagulating reaction time, the circulating amount of the coagulating acid bath and the like.

Theoretically, the lower the temperature of the coagulating acid bath, the larger the circulating amount of the coagulating acid bath, the longer the coagulation reaction time and the bath length of the coagulating acid bath, the more likely the D to R can be obtained, but considering the actual production, such as cost, yield, etc., the changes are limited, compared with the change of the coagulating bath composition, the potential is great, because the concentration ratio of sulfuric acid to sodium sulfate can be changed in the acid bath composition, and the application is particularly wide in the production of artificial filaments, such as short fibers, long fibers, cord yarns, etc.; alternatively, the appropriate additive for the coagulation acid bath may be selected so that the surface tension of the coagulation bath is reduced and D to R, for example, are reduced by using a carbioff H (formula: C)

The production requirements of the special cellophane for producing cables and glass fiber reinforced plastic fishing rods can be met, but the molding process requirements for producing the special cellophane with lower gram weight are more rigorous, and no ideal coagulating bath additive exists up to now.

The invention aims to provide application of cartiovorin L.

The invention relates to application of a carbioff L, which is characterized in that the carbioff L is added into a glass paper coagulating acid bath and is an additive of the glass paper coagulating acid bath.

Cativo root l (catiogen l), a cationic surfactant, having the chemical formula: R-N (CH)₃)₃CL, which is brown viscous liquid in appearance, has active matter content over 60%, is soluble in water and ethanol, and its 1% water solution has pH value of 7 and dissociates into cationic active radical in water, so that it cannot be used together with common soap (anionic) or common anionic detergent to avoid lowering use efficiency.

The preparation of the cativo L comprises two working procedures of halogenation and condensation, and the main raw materials are alkyl alcohol,hydrogen halide and trimethylamine, the main reactions being as follows:

(R-alkyl, C)_nH_2n+1n=12～18)

Cartiovorin L is commonly used as a bactericide, an emulsifier, a softener and an antistatic agent, but because it has excellent acid resistance (is stable even in 50% sulfuric acid) and exhibits sufficient surface activity in acid, the present invention provides a novel use of cartiovorin L as a coagulating acid bath additive in the formation of cellophane.

Comparative analysis of the effect of carbivorone L and carbivorone H as coagulating acid bath additives on glassine paper formation was performed as follows:

first, the surface tension of the acid bath to which the carbivorax L and the carbivorax H were added is listed in table 1:

table 1: surface tension comparison table of different coagulating acid baths

	Without adding active agent	0．1％L Additive bath	0．1％H Additive bath
Surface tension dye/cm	70．22	35．3	38．0

Secondly, since the formation (setting) of the cellophane isa continuous process and the influence of temperature and time on the surfactant is also important, the set acid bath of the above composition was heated to 75 ℃ and left at 75 ℃ for 10 hours, and the surface tensions at different times were measured as shown in Table 2 (measurement temperature 50 ℃ C.)

Table 2: surface tension comparison table for different time

Time (hours)	1．5	3．0	5．0	7．0	10．0
0.1% L addition bath	35．30	35．30	34．86	34．86	34．85
0.1% H addition bath	37．51	37．07	37．29	37．07	37．07

Note 1: the coagulating acid bath for testing consisted of: 10% of sulfuric acid and 20% of sodium sulfate;

2: surface tension was measured according to the maximum bubble method;

3: the addition amount of the licking agent is expressed by the weight percentage of the coagulating liquid, and 100 percent of the licking agent is a commercial product.

Meanwhile, considering that the setting reaction is more uniform in the process of forming the cellophane, a higher sodium sulfate content (same ion effect, make D-R) is generally adopted, such as 30%, under the condition that the comparative test is also carried out, the test conditions are as follows: 0.1% of a surfactant was added, and the mixture was left standing for a long time while being maintained at 70 ℃ and the surface tension during measurement was measured at 35 ℃ as shown in Table 3.

Table 3: surface tension comparison table for different time when placed for long time

Time (hours)	0	2	4	6	8	10	13	16	21	24
L additive bath H addition bath	37．67 39．24	38．54 41．17	37．89 40．30	36．79 39．86	37．01 39．42	36．68 39．42	37．45 39．42	37．01 39．42	37．01 39．20	37．67 40．73

Table 3 the results of the tests are slightly higher in surface tension compared to table 2, due to the increased sodium sulphate concentration.

As can be seen from the data in tables 1, 2 and 3, the addition of a trace amount of carbitovorin L to the acid bath for coagulating cellophane also significantly reduces the surface tension of the acid bath, and L is better than H in all aspects.

Finally, we have further investigated the relationship between the amount of added catarrhal L additive and the surface tension, as detailed in table 4. (measurement temperature 25 ℃ C.)

Table 4: surface tension comparison table with different addition amounts

As is clear from Table 4, the surface tension shows a substantially constant value within the range of the addition amount of 1.0 to 0.03%. When the amount is as low as 0.00156%, the surface tension increases sharply, which may be attributed to the fact that the surfactant is not effective when the amount is sufficiently low. Therefore, the amount of the carbioff L added to the coagulation acid bath is considered to be 0.003 to 1.000% by weight of the coagulation acid bath.

In conclusion, compared with the prior art, the surface tension of the coagulating acid bath can be effectively reduced, and the diffusion speed D is closer to the reaction speed R, so that the coagulating forming is more stable, and the quality of the glass paper can be effectively improved; meanwhile, compared with the cartiovorin H, the cartiovorin L has no ring structure, so that the structure is stable, the acid resistance is strong, the cartiovorin L is more suitable to be used as a coagulating acid bath additive in the formation of the cellophane, the cost performance is higher, and the production cost of the cellophane can be further reduced on the basis of improving the quality of the cellophane.

The invention is further described with reference to the following examples:

the coagulating acid bath comprises the following components in percentage by weight: sulfuric acid: 10-15%, sodium sulfate: 15-25%, cartiflu root L: 0.010-0.025 percent, and the balance of water. In the continuous production process, the raw materials are firstly mixed into a coagulating acid bath in an acid station according to the proportion, and then the coagulating acid bath is conveyed into a coagulating acid bath tank in a production line through a pipeline, so that the cellophane forming production can be carried out. Through practical application, the results are as follows:

first, the effect on the acid bath:

1. adding 0.01-0.025 cartifjack L, cleaning the coagulating acid bath, and after 1-2 hours, completely obtaining transparent liquid.

2. The sulfur by-products of the coagulation reaction almost completely and stably float on the liquid surface of the coagulating acid bath (can be completely removed after filtration) due to the emulsification of the cartiovorin L, so that the sulfur deposition on the nozzle and the lower paper guide roll is reduced, and the paper diseases such as the upper channel of the finished paper and the broken ends caused by the paper diseases are prevented.

3. The adding of the carbitolvorone L can obviously reduce the phenomena that the forming condition is seriously deteriorated and broken ends, ivory paper and the like are obviously increased along with the increase of the spinning speed or the reduction of the gram weight of the cellophane, and the carbitolvorone is added by 0.01 to 0.025 (the nozzle disassembly rate, the spinning paper breakage rate and the like are reduced by 20 to 50 percent).

Secondly, the quality of the cellophane is obviously improved, which is shown in that the cellophane has soft hand feeling, the tension, the elongation and the like are improved to a certain extent (see table 5), and particularly, the cellophane can promote the homogenization of viscose forming, so that the high-speed production of the cellophane can be realized, and the production of the cellophane with lower gram weight or higher gram weight can be expected to be realized through the effort.

Table 5: performance comparison table for finished paper

Claims (3)

1. The application of the cartiovorous L is characterized in that the cartiovorous L is added into a glass paper coagulating acid bath and is used as a glass paper coagulating acid bath additive.

2. Use of cartivo L according to claim 1, wherein the cartivo L is added to the coagulation acid bath in an amount of 0.003 to 1.000% by weight of the coagulation acid bath.

3. Use of cartivo L according to claim 1 or 2, characterised in that the weight percentages of the components in the solidifying acid solution are respectively: sulfuric acid: 10-15%, sodium sulfate: 15-25%, cartiflu root L: 0.01-0.025 wt%, and the balance of water.