1852results about "Flame-proof filament manufacture" patented technology

The invention relates a nylon 6 polymerization method and a direct spinning method of a melt of a polymer obtained with the nylon 6 polymerization method. A polyamide 6 prepolymer is prepared at the low temperature, the content of oligomers in the melt is controlled in advance, polymerization is completed before a large quantity of cyclic oligomers are generated with a condensation polymerization dynamic strengthening method, a nylon 6 polymer melt with certain molecular weight is acquired, the content of extracts in the product is smaller than or equal to 1.5 wt%, and the content of cyclic dipolymers is smaller than or equal to 0.2wt%; then, direct melt spinning forming is performed after condensation polymerization dynamic strengthening ends. The process is simple, energy consumption is further reduced while the utilization rate of caprolactam is increased, the obtained melt can be directly used for melt spinning, high-capacity large-scale production is easy to realize, a modifier can be added in the polymerization process, flexible production of nylon 6 is realized, and the nylon 6 can be applied to fibers for clothes, industrial filaments, engineering plastics and other fields.

The invention provides carpet fibers prepared from a blend of polymeric components, said fiber exhibiting improved properties, such as improved spinnability and improved fire resistance. The carpet fibers particularly comprise a majority of polytrimethylene terephthalate (PTT) and a minority of polyethylene terephthalate (PET). The invention further provides yarns and carpets prepared from the inventive fibers, said yarns and carpets likewise exhibiting improved properties. The invention also provides methods of improving various physical properties (such as fire resistance, spinnability, and elongation) of a polymeric composition.

A flame-retarding copolymerized terylene chip is prepared on the basis of ordinary preparing process of terylene chip and is characterized by that after the esterifying step in the process to prepare polyester is finished, the flame-retarding agent, which is prepared from 2-carboxyethyl phenylphosphoric acid through dissolving it in ethylene glycol (EG), is added. Its advantages are high and durable flame-retarding effect, no toxicity and high spinnability.

A flame-retardant synthetic resin composition characterized by comprising 1-40 parts by weight of at least one type of organic phosphorus compound represented by the following general formula (1):

(wherein R¹ represents alkyl, aralkyl, etc.)

with respect to 100 parts by weight of a synthetic resin.

The invention relates to a multi-purpose sheath-core composite monofilament for weaving reticulated as well as a production method and application thereof, and belongs to the technical field of production of composite fibers. The multi-purpose sheath-core composite monofilament comprises a sheath layer and a core layer, wherein the sheath layer covers the core layer; the core layer is prepared from PP, TPU or TPEE; the sheath layer is prepared from PE, POE, TPU or TPEE; the melting point of the sheath layer is 120 to 170 DEG C; the melting point of the core layer is 150 to 210 DEG C; the content of the sheath layer is 30 to 70 percent; the content of the core layer is 70 to 30 percent. The multi-purpose sheath-core composite monofilament comprising two components can be applied to weaving of gauze, window screens, curtains, abat vents, light equalization cloth, anti-mosquito nets, anti-haze gauze, filter screen cloth, shoe screen cloth, and base materials of power transmission belts.

The invention provides a polyamide 56 material prepared from bio-based 1,5-pentamethylene diamine. The polyamide 56 material is renewable and has the high flame-retardant property. The polyamide 56 material comprises polyamide 56 and a composition of nitrogen-containing flame retardants or is a polymer formed by pentamethylene diamine, adipic acid and nitrogen-containing flame retardants serving as a polymeric monomer. The material is good in flame-retardant effect, low in toxicity, high in safety, low in cost and capable of being used as engineering plastics and a spinning material. According to the material, the preparation process is simple and convenient, and wide industrial application prospects are achieved.

The invention relates to a method for preparing a polyester filament, in particular to a method for preparing a colorized fire-retardant delustering hollow polyester filament. The method mainly solves the technical problem of the prior art that color master batches and a delustering agent added into a fire-retardant slice can influence the viscosity of a fused mass during the spinning and the friction to a device in the processing process so that colorized, fire-retardant and delustering finished polyester fiber and the like cannot be prepared. The preparation method comprises the following steps: adding a copolymerization fire retardant in the process of preparing a polyester slice to form the fire-retardant slice; performing pre-crystallization on and drying the fire-retardant slice, the color master batches and delustering master batches, and evaporating the water content; mixing the fire-retardant slice with the color master batches and the delustering master batches, passing the mixture into a double screw extruder to perform heating melting, performing filter mixing and measuring allocation on the fused mass, and spinning the fused mass into tows; and performing cooling molding on the tows through lateral blow, and obtaining a finished product after oil tanker oiling, drafting, networking and winding.

The invention discloses a anti-melting flameretardant fiber and preparation method thereof. The flame-retardant is added in the dissolving procedure to using production method of viscose fiber, and then processed by mixing, filtration, ripening, debubbling, spinning, refinning, drying, and finished product to produce flameretardant fiber. When burning, the said anti-melting flameretardant fiber will not melt but only carbonize to keeping the original shape of fibre, therefore it prevent high temperature melting drip scalding the people. Furthermore the flame-retardant homogeneously disperses in viscose, and does not smolders and is easy to self extinguish after leaving fire source. The said preparation method is simple and easily operated. The flame retardant property is good, and the disperse of flame-retardant is homogeneous.

The invention discloses a preparation method of halogen-free flame retardant high-intensity polyvinyl alcohol fibers, which is characterized by comprising the following steps of uniformly mixing 20-45 parts by weight of phosphate ester flame retardant powder with the average particle size no more than 1.0 microns, 1-10 parts by weight of dispersing agent, and 40-79 parts by weight of water to prepare flame retardant suspended slurry, continuously mixing the slurry and polyvinyl alcohol plus boron spinning solution with the polymerization degree of 1700-3000 and the alcoholysis degree more than 99 percent through a mode of spun injection, carrying out spinning with the mixed solution through a polyvinyl alcohol wet method plus a spinning process route, carrying out neutralization, wet-heat drawing, washing and drying on solidified fibers to obtain as-spun fibers, preheating the as-spun fibers to the temperature of 200-230 DEG C, drawing by 2-4 times, and then carrying out heat setting on the fibers at the temperature of 180-210 DEG C for 2-5min to obtain the halogen-free flame retardant high-intensity polyvinyl alcohol fibers. According to different uses, post-treatment steps such as formalization, oiling, curling, cutting and the like can be selectively carried out on the flame-retardant fibers. The flame-retardant fibers prepared through the method has the advantages of low toxicity and high intensity, realizes self-extinguishment after leaving fire, is free of halogen and the dripping phenomenon and is used for aspects of fabric flame retarding, enhancing flame retardant fabrics and the like, and the limited oxygen index can reach 28-30.

The invention discloses a method for producing melamine formaldehyde resin/polyvinyl alcohol flameproof fiber. The invention is characterized in that composing melamine and formaldehyde at the mole ratio as 1:1.2-1:6 and 50-100Deg. C into melamine formaldehyde resin water solution, to be mixed with the polyvinyl alcohol water solution at the solid content ratio as 2:8-8:2 to obtain spinning original liquid, then spinning and shaping the original liquid via general wet method, and treating solidifying bath via acid sodium sulfate saturated water solution, and the primary fiber is drawn, shaped via wet and heat method, washed, coiled, oiled, dried, and heated in dry condition to obtain the final melamine formaldehyde resin/polyvinyl alcohol flameproof fiber. The titer of said flameproof fiber is 10detex, while the strength is 1-3cN/dtex, the crack extended rate is 5-15%, the regain ratio is 5-10%, and the limit oxygen index is 30-45.

The present invention discloses a polymer composite function fibers containing partial graphene, and a preparation method thereof. The fibers comprise a component A and a component B, wherein the component A and the component B are combined in a partial exposing manner, side-by-side manner or skin-core manner, and 20-100% of the outer area of each fiber is the component B. The method comprises: crystallizing a polyester containing 0.1-1 wt% of partial reducing graphene and a polyester containing 4-20 wt% of a nanometer composite filler containing partial reducing graphene and TiO2, drying, carrying out melt composite spinning, and carrying out drawing and relaxation heat setting at a temperature of 80-160 DEG C, and reducing the partial graphene in the fibers to achieve the carbon/oxygen atom ratio of 9/1-15/1 through the reducing treatment. According to the present invention, the prepared fibers can be produced at the high spinning speed, and the production efficiency is high; and the fibers have characteristics of low single fineness, high strength and lower resistivity, meets the antistatic requirement, and further has characteristics of anti-bacterial property and flame retardant property so as to provide good application prospects.

The invention discloses a preparation method of a superfine fiber polyurethane leather base cloth based on a conventional process, and in the step of spinning, FR-535 flame retardant nylon master batches are added to perform fire retardant treatment on superfine fibers. The invention also discloses the superfine fiber polyurethane leather base cloth prepared by the method, a preparation method of superfine fiber polyurethane leather, the superfine fiber polyurethane leather prepared by the method and an application of the method in preparing leather for automobile trim. The method in the invention can enable the superfine fiber polyurethane leather base cloth and the synthetic leather to have excellent flame retardant property with the horizontal burning time of 3min and damaged length of no more than 81mm. In addition, the superfine fiber synthetic leather has excellent combination property, such as light resistance, favorable fastness, high wear resistance and the like, delicate color, has the physical properties capable of comparing favorably with natural cow leather, and can satisfy the requirement of leather in automobile trim.

The invention relates to a modified polypropylene fiber and a preparation method thereof. The invention is characterized in that the fiber has a skin-core structure, wherein the core layer is composed of pure polypropylene; and the skin layer is composed of 0.5-60 parts of functional material, 0-5 parts of compatilizer and the balance of polypropylene, totaling 100 parts. The viscosity-average molecular weight of the polypropylene is 0.18-0.3 million, and the degree of isotacticity is greater than 95%. The functional material is a functional polypropylene fiber master batch prepared by blending and granulating inorganic or organic functional micropowder, a compatilizer and polypropylene, wherein the functional micropowder is composed of one or more of nano silicon dioxide, nano titanium dioxide, nano silicon dioxide, an anti-mite agent and an N-substituted alkoxy hindered amine flame retardant. The polypropylene fiber can be subjected to skin-core conjugate spinning according to the skin-core formula, and can be further processed into a polypropylene fiber spunbonded nonwoven fabric or melt-blown nonwoven fabric by spunbonding or melt-blowing. The method has the advantages of simple production technique and small modification for equipment, and is easy for practical popularization and application.

The invention discloses a graphene/nylon 6 fiber with flame-retarding and ultraviolet-proof properties and a preparation method of the graphene/nylon 6 fiber and belongs to the technical field of functional high molecular materials. The graphene/nylon 6 fiber with the flame-retarding and ultraviolet-proof properties is prepared through high-speed melting spinning of a graphene/nylon 6 nano composite material; the graphene/nylon 6 nano composite material is prepared by compounding modified graphene, caprolactam and various auxiliary agents. The graphene/nylon 6 nano composite material obtained by the invention can continuously pass through a melting spinning hole at a high speed and continuous high-speed spinning is realized; the diameter of the fiber is 5mum to 50mum; compared with a pure nylon 6 fiber, the prepared graphene modified nylon 6 fiber has excellent flame-retarding, melt-dripping-resisting and ultraviolet-proof performances and the like.

The invention discloses a P-based polyester fire-retardant fiber which comprises a fiber body containing polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate or cation-modified polyethylene terephthalate. The fiber body further contains a P-based fire retardant selected from 2-carboxyethylphenyl phosphoric acid, 2-carboxyethyl methylphosphonate or 2-carboxyethyl methylphosphoric acid. The production process of the fiber comprises mixing polyesters for forming the fiber body with the P-based fire retardant, performing melt-spinning to obtain fire-retardant fiber precursor, subjecting to winding, stretching and netting processes to make fire-retardant polyester long filament (that is P-based polyester fire-retardant fiber). The inventive fire-retardant fiber has the similar physical property to the common polyester fiber and is superior in good spinning property and excellent fire-retarding effect.

The invention relates to a flame-resistant and uvioresistant polyester composite material and a method for preparing the same. The composite material is prepared by performing an esterification reaction on ethylene glycol, terephthalic acid, uvioresistant agent pulp and a flame retardant and then performing low-vacuum condensation polymerization and high-vacuum condensation polymerization, wherein the added amounts of the uvioresistant agent pulp and the flame retardant are between 0.1 and 20 weight percent and between 0.1 and 20 weight percent respectively; the esterification reaction is performed at the temperature of between 200 and 290 DEG C and under a pressure of between 0.1 and 0.6 MPa for 1 to 4 hours; the low-vacuum condensation polymerization is performed at the temperature of between 200 and 290 DEG C and under the pressure of between 100,000 and 500 Pa for 10 to 90 minutes; the high-vacuum condensation polymerization is performed at the temperature of between 250 and 300 DEG C and under the pressure of between 500 and 50 Pa for 1 to 4 hours; and the uvioresistant agent pulp consists of 5 to 30 weight percent of inorganic nano-oxide and the ethylene glycol. Flame-resistant and uvioresistant polyester fiber fabrics prepared from the material have flame resistance and uvioresistant effect.

A yarn, fabric, and garment suitable for use in arc and flame protection comprising aramid fiber and modacrylic fiber wherein the modacrylic fiber has less than 1.5 percent antimony and is preferably antimony-free. In one embodiment, the yarn, fabric, and/or garments consist essentially of (a) 50 to 80 weight percent meta-aramid fiber having a degree of crystallinity of at least 20%, (b) 10 to 40 weight percent modacrylic fiber that is antimony-free, (c) 5 to 20 weight percent para-aramid fiber, and (d) 1 to 3 weight percent antistatic fiber, based on the total weight of components (a), (b), (c) and (d). In some embodiments, garments made from the yarns provide thermal protection such that a wearer would experience less than a 65 percent predicted body burn when exposed to a flash fire exposure of 4 seconds per ASTM F1930, while maintaining a Category 2 arc rating per ASTM F1959 and NFPA 70E.

The invention discloses a blending fireproof terylene industrial filament and the production method thereof. The blending fireproof terylene industrial filament contains a flame retardant master batch. The flame retardant master batch and a terylene master batch are prepared by the weight percentages as follows: polyethylene terephthalate 90-95% and inorganic flame retardant master batch 5.0-10.0%. The production method includes processes of solid phase polymerization, spinning, drafting shrink-setting. Through selecting reasonable blending modifier as well as reasonable technological process and technological parameter, the product of the invention has good permanent flame retardant property and keeps high strength and high modulus required by the industrial filament, thereby being widely used in preparing interior decoration materials, the paver for vehicles, cars, ships and so on, industrial hoisting, covering materials, military supplies, mine used conveying belt, etc.

The invention provides an application of polyamide 5X as a flame-retardant material. When taken as the flame-retardant material, polyamide 5X has a good flame-retardant effect, is safe to the environment, safe in physiology and compatible with various high-polymer textile materials, cannot damage attractiveness and texture characteristics of textile, and is resistant to repeated washing and cleaning. When taken as the flame-retardant material, polyamide 5X has flame retardance which cannot be reduced with increase of the washing times, and belongs to a permanent flame-retardant type.

The invention relates to a permanent antistatic flame-retardant polyamide-6 bulked continuous filament textured carpet yarn and a preparation method. The permanent antistatic flame-retardant polyamide-6 bulked continuous filament textured carpet yarn comprises a carpet yarn body, wherein the carpet yarn body consists of two tows of flame-retardant polyamide-6 bulked continuous filaments in different colors or the same color and a tow of antistatic polyamide-6 bulked continuous filaments; single fibers in the three tows of polyamide-6 bulked continuous filaments are random three-dimensional crimped fibers; different types of fibers are randomly mixed and intertwined; and periodical net knots are arranged on the surface of the carpet yarn body. The preparation method is implemented by one step through a tri-screw bulked continuous filament (BCF) spinning machine set. The product substantially maintains the characteristics of abrasion resistance, stain resistance, resilience and the like of polyamide-6, and also has a permanent antistatic function and a flame-retardant function. According to the preparation method, the characteristics of a production process of the tri-screw BCF spinning machine set are utilized, so that the aim of spinning the antistatic flame-retardant polyamide-6 textured carpet yarn by one step is fulfilled, and the production process is simple, practical and efficient.