CN1219115C - Color-fixing polypropylene fiber dyed-yarn preparing method - Google Patents

Abstract

The invention relates to a method for preparing color-fixed polypropylene dyed yarn. In the process of spinning and forming, polar groups are introduced into the main chain of polypropylene, so that the coloring components in the color masterbatch and the polar groups on the main chain of polypropylene The polar group reacts in situ to form a chemical combination between the coloring component and the polar group; the raw materials used in the present invention are sold as industrial-grade finished products, so the raw materials are easy to obtain; the prepared color-fixing polypropylene dyed yarn has excellent The color fastness to washing can be directly used in industrialized production, and the method of the invention can be implemented on existing polypropylene fiber manufacturing equipment without adding new processing equipment.

Description

Preparation method of color-fixed polypropylene dyed yarn

Technical field

The invention relates to a polypropylene dyeing method, in particular to a preparation method for color-fixed polypropylene dyed yarn.

Background technique

Because polypropylene has no polar groups that can be combined with dye molecules in its molecular structure, such as -OH, -NH ₂ , -CONH-, -COORo, etc., there is no dye-friendly seat for dyes, and it is difficult for dyes to combine with polypropylene. Chemical bonds are formed between macromolecules. At the same time, due to the high crystallinity, dense structure and strong hydrophobicity of polypropylene, dye molecules can only diffuse and penetrate into the surface of the amorphous part or crystal region. At present, the dyeing of polypropylene fiber can be roughly divided into three methods: one is to modify polypropylene fiber, such as graft copolymerization, blending, etc., to introduce active groups into the macromolecular structure so that the product fiber has dye-friendly dyeing properties. The second is to use the matrix coloring method, that is, the pigment is added before melt spinning; the third is to add the dyeing ligand organometallic complex to the resin, and then dye it with a special dispersive mordant containing complexing groups. Dye for dyeing.

The matrix coloring method uses a resin (matrix) containing a high concentration of pigments to be mixed with a common spinning resin, and then melt-spun to produce colored fibers. Because the coloring agent is dispersed in the polymer matrix before spinning, the color is bright, the tone is uniform, and it is simple and easy to implement. At the same time, it can avoid the poor dyeing uniformity and environmental pollution caused by dyeing wastewater due to the influence of uneven fiber structure and mechanical properties. Shortcomings.

Although the coloring of the matrix makes the coloring of polypropylene fiber possible, since the non-polar characteristics of the molecular chain structure of polypropylene itself have not changed, the coloring components are only dispersed and retained in the fiber matrix under the action of physical entanglement points. Under the condition, once this physical fixation point is canceled, the coloring components are easily detached from the fiber matrix, and the macroscopic performance is decolorization of the colored filaments. The smaller the molecular weight of the coloring material, the more obvious this decolorization phenomenon. Therefore, increasing the molecular weight of pigments to prepare color-fixing masterbatches is an important research and development direction. However, this kind of research is only carried out for specific pigments, and it lacks flexible interchangeability in the occasion of multi-color intermixing, which limits its general use.

In the fiber preparation process, the oiling of primary fibers and finished fibers is an important process. In a broad sense, chemical fiber oil agent refers to a class of additives used in the production and processing of chemical fibers. It can be used to adjust the friction characteristics of fibers, prevent and eliminate static electricity accumulation, endow fibers with certain smoothness, softness and other characteristics, and make chemical fibers run smoothly. Through spinning, weaving and other processes. Some functionalized oil agents can endow fibers with different mercerizing properties, water resistance, stain resistance, oil resistance, flame retardancy or antistatic properties, etc.

Contents of Invention

The purpose of the present invention is to solve the problems existing in the prior art, and to provide a method for preparing color-fixed polypropylene colored yarn. The ingredients react in situ with the polar groups on the polypropylene backbone to form a chemical bond between the coloring ingredient and the polar groups.

The preparation method of color-fixing polypropylene colored silk of the present invention comprises the steps:

(4) The raw material for spinning is polypropylene matrix resin according to the proportioning ratio: functional additives: color masterbatch=90～98: 1.5～8: 0.5～2 weight percent mechanically blending and then performing melt blending spinning extrusion, spinning temperature The setting range of is shown in Table 1:

Table 1 screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 200～220 220～240 230～250 230～250 210～220 210～235 210～235

(5) Stretching, winding, and oiling treatment of the extruded nascent fiber, with the oiling amount of the functional modified oil accounting for 1.0 to 3.0% by weight of the nascent fiber;

(6) Post-stretching, shaping, and winding of nascent fibers;

The functional additive is ethylene-vinyl acetate copolymer, polyamide, polyester, polyoxyethylene, polyoxypropylene, polyester-polyether copolymer, polypropylene grafted maleic anhydride, polypropylene grafted acrylic acid, poly One or more mixtures of ester liquid crystal polymers and polyolefins; the functional modified oil agent is mainly composed of smoothing agent, sizing agent, antistatic agent and other functional additives, wherein the amount of smoothing agent is oil agent The total amount is 30-70% by weight, the amount of sizing agent is 25-65% by weight of the total amount of oil, the amount of antistatic agent is 0.5-3.0% by weight of the total amount of oil, and the amount of other additives is 25% by weight of the total amount of oil. 0-5% by weight.

The smoothing agent is composed of one or more mixtures of polyol esters, polyether nonionic surfactants, and polyols.

The polyol ester includes one or more of neopentyl glycol, trimethylolethane, trimethylolpropane, pentaerythritol, or the esterification product of glycerin and monobasic acid, sorbitan oleate mixture.

The polyether type nonionic surfactant is polypropylene oxide polyoxyethylene adduct.

The polyhydric alcohol is one or more mixtures of pentaerythritol, isopentyl glycol, glycerin, or their own dehydration oligomers.

Sizing agents are mainly ester or ether nonionic surfactants, including sulfated castor oil, oleic acid triethanolamine, alkyl acyl alcohol amine, fatty acid polyoxyethylene ester, polyacrylic acid, polyvinyl alcohol, carboxymethyl cellulose One or more mixtures of sodium, polyacrylamide, modified starch, gelatin, sodium alginate, and polyvinylpyrrolidone. The cohesive force generated by the association of polymers and water molecules is used to improve the bundleability of fibers. One or more mixtures of butyl cellosolve, mineral oil, and modified castor oil can also be used to improve the bundling properties of fibers.

Antistatic agents are mainly nonionic, anionic or cationic surfactants, such as fatty alcohol phosphates, polyoxyethylene fatty alcohol phosphates such as potassium cetyl alcohol phosphate; quaternary ammonium salt cationic surfactants such as ten Dialkyldimethylammonium chloride, cetyltrimethylammonium bromide, etc.

Other additives include silicate inorganic ultrafine powder; antifungal agents such as alkyl trimethyl ammonium bromide, alkyl dimethyl benzyl ammonium bromide; defoaming agents such as octanol, 2-ethylhexyl alcohol, lauryl alcohol, polyethylene glycol, etc.

Modified oil agent can provide better bundling, smoothness and stronger oil film strength of colored yarn, and also help to improve fiber crystallization performance, increase the uniformity and density of fiber structure, and improve the fixation ability of fiber to coloring components , so the obtained dope-dyed polypropylene fiber not only has good color fastness to washing, but also has certain color fastness to rubbing. Functional modified oil agent is mainly composed of smoothing agent, clustering agent, antistatic agent and other functional additives. Among them, the smoothing agent is mainly used to reduce the friction between the fibers, the fiber and the rotating roller, and increase the strength of the oil film on the surface of the thread; High viscosity; antistatic agent is mainly used to eliminate static electricity generated by friction between fiber-fiber and fiber-mechanical parts in the process of fiber production, so as to avoid the accumulation of static electricity.

Compared with the prior art, the present invention has the following advantages:

1. The color-fixed polypropylene yarn prepared by the method of the present invention has excellent color fastness to washing;

2. The raw materials used in the preparation of the present invention are sold as industrial-grade finished products, so the raw materials are easy to get;

3. The color-fixing polypropylene dyed yarn prepared by the method of the present invention can be directly used in industrial production;

4. The method of the present invention can be implemented on the existing polypropylene fiber manufacturing equipment without adding new processing equipment. Except that the spinning forming temperature needs to be properly adjusted according to the amount and type of functional additives, other process parameters can be in accordance with the original process parameter implementation;

5. The invention has good color fixing effect and low cost.

Detailed ways

Example 1

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.93 tons

Functional additive: ethylene-vinyl acetate copolymer 0.03 tons

     Polyoxyethylene (5000)   0.02 tons

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting: screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 205 220 235 235 220 215 215

Oil composition (according to the total amount of 1000g):

                                               

                                                           

    Polyoxyethylene ether (10) monolaurate                                                      

                                                                                                

Sorbitan Oleate 100g

                                                     

Glycerin 50g

Alkyltrimethylammonium bromide 35g

                                                                           

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The amount of oil on the fiber is 2.5% (percentage by weight) of the weight of the fiber.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing can reach grade 3-5.

Example 2

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.92 tons

Functional additive: ethylene-vinyl acetate copolymer 0.04 tons

Polyethylene (mi = 10) 0.02 tons

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting: screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 205 220 235 235 220 215 215

Oil composition (according to the total amount of 1000g):

    Macrogol (400) laurate       400g

                                                                                                                       

    Polyethylene glycol (600) oleate                                    

                                                                      

                                                                 

                                                                                                            

Alkyltrimethylammonium bromide 10g

Gelatin 10g

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The fiber oiling amount is 2.3% (percentage by weight) of the fiber weight.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing can reach grade 3-5.

Example 3

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.94 tons

Functional additives: polyester 0.02 tons

                                                                                                                                      ,

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting: screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 205 210 230 230 215 210 210

Oil composition (according to the total amount of 1000g):

                                                                 , 

                                                                                    ,

                                                   

                                                     

Polyethylene Glycol 80g

                                                                                                                      

Alkyl dimethyl benzyl ammonium bromide 25g

                                                       

Sodium carboxymethylcellulose 10g

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The amount of oil on the fiber is 2.5% (percentage by weight) of the weight of the fiber.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing has reached grade 4-5.

Example 4

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.93 tons

Functional additives: polyester-polyether copolymer 0.04 tons

                                                                                                                                                ,

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting: screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 205 210 230 230 215 210 210

Oil composition (according to the total amount of 1000g):

                                                                         

                                                                                                         

Isoamyl glycol 100g

Sperm whale oil 100g

                                                           

                                                                            

Alkyl Dimethyl Ammonium Bromide 15g

                                                                   

Octanol 10g

Sodium Alginate 5g

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The fiber oiling amount is 2.0% (percentage by weight) of the fiber weight.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing has reached grade 4-5.

Example 5

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.96 tons

Functional additive: polypropylene grafted polyacrylic acid 0.02 tons

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting: screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 205 210 225 225 215 210 210

Oil composition (according to the total amount of 1000g):

    Polyoxyethylene (10) sorbitol glyceride 300g

Polyte oxygenylene (6) Renoholin 250g

                                                                                                     

                                                                                                                

Sperm whale oil 100g

                                                                         

                                                       

                                                                                                      

                                                                                                                 

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The amount of oil on the fiber is 2.5% (percentage by weight) of the weight of the fiber.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing has reached grade 4-5.

Example 6

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.92 tons

Functional additives: polyamide 6 0.02 tons

                                                                                                                                        ,

                                                                                                                                   ,

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting:

                    flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 215 220 235 235 220 215 215

Oil composition (according to the total amount of 1000g):

   Polyoxyethylene (8) sorbitan glyceride 300g

Polyte oxygenylene (4) oil alcohol ether 240g

Sorbitan Tristearate 100g

Propylene Glycol Monolaurate 100g

                                                                                            

Isoamyl glycol 100g

                                                                                    

                                           

                                                                  

Alkyl dimethyl benzyl ammonium bromide 10g

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The amount of oil on the fiber is 2.5% (percentage by weight) of the weight of the fiber.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing has reached grade 3-5.

Example 7

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.93 tons

Functional additives: polyamide 66 0.02 tons

                                                                                                                                      ,

                                                                                                                                              ,

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting: screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 215 220 235 235 220 215 215

Oil composition (according to the total amount of 1000g):

                                                                                                                                                                              

    Polyoxyethylene (6) sorbitan glyceride 150g

    Polyoxyethylene (10) sorbitan glyceride 150g

Penetrant OT 100g

Propylene Glycol Monolaurate 100g

                                                                                       

Isoamyl glycol 100g

                                                                     

                                                                                      

                                             

Alkyl dimethyl benzyl ammonium bromide 10g

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The amount of oil on the fiber is 2.5% (percentage by weight) of the weight of the fiber.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing has reached grade 4-5.

Example 8

Spinning 900D/90f dyed yarn, the composition of spinning raw materials (calculated by one ton):

Polypropylene (MI=15g/10min) 0.92 tons

Functional additives: polyamide PA (spinning grade) 0.03 tons

                                                                                                                                                       ,

Masterbatch (Dahong LD-03) 0.02 tons

Spinning forming temperature setting: screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 215 220 235 235 220 215 215

Oil composition (according to the total amount of 1000g):

Polyte oxygenylene (10) oil alcohol ether 220g

    Polyoxyethylene (6) sorbitan glyceride 200g

    Polyoxyethylene (2) sorbitan glyceride 110g

N, N dihydroxyethyl oleamide 110g

Propylene Glycol Monolaurate 100g

Mineral oil 100g

Isopentyl glycol 100g

                                                           

                                                                                       

Sodium Lauryl Sulfonate 15g

Alkyl dimethyl benzyl ammonium bromide 10g

The obtained oil agent is a milky white or light yellow viscous liquid, which is diluted with four times deionized water when used. The amount of oil on the fiber is 2.5% (percentage by weight) of the weight of the fiber.

After the obtained red polypropylene fiber is soaked in boiling water for 0.5 hour, the water becomes transparent and clear. According to AATCC61-1996, the color fastness to washing can reach grade 3-5.

Claims (4)

1, a kind of preparation method of color-fixed polypropylene yarn, is characterized in that comprising the steps: (1) The spinning raw material is polypropylene matrix resin according to the ratio: functional additives: color masterbatch = 90 ~ 98: 1.5 ~ 8: 0.5 ~ 2 weight percent mechanically blended and then melt blended spinning extrusion, spinning temperature The setting range of is shown in Table 1: Table 1 screw flange cabinet a district Second District Third District Four districts five districts Temperature setting range (℃) 200～220 220～240 230～250 230～250 210～220 210～235 210～235 (2) Stretching, winding, and oiling treatment of the extruded nascent fiber, where the oiling amount of the functional modified oil accounts for 1.0 to 3.0% by weight of the nascent fiber; (3) Post-stretching, shaping, and winding of as-spun fibers; The functional additive is ethylene-vinyl acetate copolymer, polyamide, polyester, polyoxyethylene, polyoxypropylene, polyester-polyether copolymer, polypropylene grafted maleic anhydride, polypropylene grafted acrylic acid, polyoxypropylene One or more mixtures of ester liquid crystal polymers and polyolefins; the functional modified oil agent is mainly composed of smoothing agent, sizing agent, antistatic agent and other functional auxiliary agents, wherein the amount of smoothing agent is oil 30-70% by weight of the total amount of the agent, the amount of the sizing agent is 25-65% by weight of the total amount of the oil, the amount of the antistatic agent is 0.5-3.0% by weight of the total amount of the oil, and the amount of other additives is the total amount of the oil 0-5% by weight of The smoothing agent is composed of one or more mixtures of polyol esters, polyether-type nonionic surfactants, and polyols; the sizing agent is sulfated castor oil, oleic acid triethanolamine, alkyl acyl alcohol One or more mixtures of amines, fatty acid polyoxyethylene esters, polyacrylic acid, polyvinyl alcohol, sodium carboxymethylcellulose, polyacrylamide, modified starch, gelatin, sodium alginate, and polyvinylpyrrolidone; The antistatic agent is potassium cetyl alcohol phosphate, lauryl dimethyl ammonium chloride or cetyl trimethyl ammonium bromide; the other additives include silicate inorganic ultrafine powder One or more mixtures of solids, alkyl trimethyl ammonium bromide, alkyl dimethyl benzyl ammonium bromide, octanol, 2-ethylhexanol, lauryl alcohol, polyethylene glycol. 2. The method for preparing color-fixed polypropylene yarn according to claim 1, characterized in that said polyol ester comprises neopentyl glycol, trimethylolethane, trimethylolpropane, pentaerythritol, or glycerin and One or more mixtures of esterification products of monobasic acids and sorbitan oleate. 3. The method for preparing color-fixed polypropylene dyed yarn according to claim 1, characterized in that the polyether type nonionic surfactant is polypropylene oxide polyoxyethylene adduct. 4. The method for preparing color-fixed polypropylene dyed yarn according to claim 1, characterized in that the sizing agent is one or more mixtures of butyl cellosolve, mineral oil, and modified castor oil.