Abstract

A process and equipment for preparing a polyamide 56 filament by means of one-step continuous forming and flexible deformation. The preparation process mainly includes three parts: a liquid phase polymerization process of a polyamide salt solution, a spinning forming process and a flexible post-processing process; and fully drawn yarn, drawn textured yarn or air textured yarn can be prepared continuously in one step by means of same.

IPC Classes  ?

• D01D 5/088 - Cooling filaments, threads or the like, leaving the spinnerettes
• D01D 5/12 - Stretch-spinning methods
• D01D 5/16 - Stretch-spinning methods using rollers, or like mechanical devices, e.g. snubbing pins
• D02J 13/00 - Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
• D02J 1/22 - Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
• D02J 1/08 - Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
• D02G 1/02 - Producing crimped or curled fibres, filaments, yarns or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e . by imparting false twist
• D02G 1/16 - Producing crimped or curled fibres, filaments, yarns or threads, giving them latent characteristics using jets or streams of turbulent gases, e.g. air, steam
• D01F 6/60 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from homopolycondensation products from polyamides
• C08G 69/28 - Preparatory processes

Abstract

Disclosed are a copolymerized polyamide 56/66 polymer, a preparation method therefor, and the use thereof. The method for preparing the copolymerized polyamide 56/66 polymer of the present invention comprises the following steps: (1) preparing a polyamide 56/66 salt aqueous solution according to the point 1) as below and/or 2): 1) in an inert atmosphere, mixing 1,5-pentanediamine, hexanediamine and adipic acid in water for a neutralization reaction; and 2) mixing a polyamide 56 salt crystal and a polyamide 66 salt crystal; and (2) subjecting the polyamide 56/66 salt aqueous solution to a polymerization reaction in order to obtain the polymer. The present invention further relates to spraying out a melt of the copolymerized polyamide 56/66 polymer through a spinneret plate to obtain a fine melt stream, the fine melt stream is cooled and solidified to form a strand, and a fiber post-treatment is carried out in order to obtain copolymerized polyamide 56/66 polymer fibers. The fibers prepared from the copolymerized polyamide 56/66 polymer obtained by the present invention have a higher strength, wear resistance and flame retardance, and also habe an excellent dyeability and comfort, can adapt to being used in places with a higher temperature, humidity and voltage, and is safe and environmentally friendly.

IPC Classes  ?

• C08G 69/26 - Polyamides derived from amino carboxylic acids or from polyamines and polycarboxylic acids derived from polyamines and polycarboxylic acids
• C08G 69/28 - Preparatory processes
• D01F 6/80 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from copolycondensation products from copolyamides
• D01F 6/90 - Monocomponent man-made filaments or the like of synthetic polymersManufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyamides
• D01F 1/10 - Other agents for modifying properties

Abstract

Disclosed in the present invention is an alkaline dip-dyeing method for a polyamide 56 fiber and a fabric. (1) The method is suitable for various dyes and capable of achieving the dyeing of a polyamide fiber by means of a vat dye, a reactive dye, a direct dye, and a sulfur dye, and thus, a dyed fabric is bright and deep in color; (2) the color fastness is good, the test results of color fastness, such as rub resistance, soaping resistance, alkaline perspiration resistance, and sunlight resistance, of the dyed fabric can meet use requirements, the rub resistance and the soaping resistance can reach level 3-4 or more, and the color fastness to sunlight can reach level 5 or more; (3) a process is simple, quick dyeing can be realized at a low temperature condition, and energy saving and emission reduction are realized; and (4) by using a biology-based polyamide fabric as a raw material, the present invention meets the requirements of green, environmental protection, and sustainability, and has important practical significance.

IPC Classes  ?

• D06P 1/22 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using vat dyestuffs
• D06P 1/38 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using reactive dyes
• D06P 1/10 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using azo dyes containing metal
• D06P 1/30 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using sulfur dyes
• D06P 3/24 - PolyamidesPolyurethanes

Abstract

Provided by the present invention is an alkaline pad dyeing method for a nylon 56 and cellulose fiber blended fabric. A vat dye, a reactive dye, a direct dye and a sulfur dye are used for one-bath pad dyeing a nylon 56 fiber and cellulose fiber blended fabric, which may achieve the use of a set of dyes to complete the pad dyeing of blended fabrics. After dyeing, the fabric has bright colors, deep colors, friction resistance and washing resistance up to level 3-4 or more, and sunlight-resistant color fastness up to level 5 or more. The process is simple and energy saving, and reduces emissions.

IPC Classes  ?

• D06P 3/82 - Textiles which contain different kinds of fibres
• D06P 1/00 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed
• D06P 1/22 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using vat dyestuffs
• D06P 1/30 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using sulfur dyes
• D06P 1/38 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using reactive dyes

Abstract

The present invention discloses an acid low-temperature dip dyeing method for a polyamide 56 fiber and fabric. The dyeing method of the present invention comprises the following step: using an acidic dye, a neutral dye or an active dye to dye a polyamide 56 fiber or a fabric thereof. The method has the following advantages: (1) a good dyeing effect, a deep color yield, and a high dye uptake rate; (2) a good color fastness, and the level of rub resistance and wash resistance reaching up to four or above, and the level of color fastness to sunlight reaching up to six or above; and (3) a simple process flow, energy-saving and emission reduction, and being a dyeing method for quick dye uptake at a low temperature and within a short time, low-temperature dyeing effectively reducing damage to a fiber during dyeing, reducing the weight loss rate of the fiber, and facilitating increasing the production rate of a post-process product.

IPC Classes  ?

• D06P 3/24 - PolyamidesPolyurethanes
• D06P 1/38 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using reactive dyes
• D06P 1/39 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using acid dyes
• D06P 1/00 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed
• D06P 1/16 - General processes of dyeing or printing textiles or general processes of dyeing leather, furs or solid macromolecular substances in any form, classified according to the dyes, pigments or auxiliary substances employed using dispersed, e.g. acetate, dyestuffs