846 results about "Polytrimethylene terephthalate" patented technology

A new polypropylene terephthalate composition is provided. The polypropylene terephthalate is comprised of 1,3-propanediol and terephthalate. The 1,3-propanediol is produced by the bioconversion of a fermentatble carbon source, preferable glucose. The resulting polypropylene terephthalate is distinguished from petrochemically produced polymer on the basis of dual carbon-isotopic fingerprinting which indicates both the source and the age of the carbon.

The invention provides a preparation method of functional polyester fibers. The preparation method mainly comprises the following two steps of: firstly, mixing functional powders, polybutylene terephthalate cyclic oligomer (CBT) and a dispersing agent, performing reactive extrusion on the mixture by double screws to prepare a polybutylene terephthalate (PBT) functional master batch, wherein the functional powders are one of or several of a carbon nano tube, nano titanium dioxide, tourmaline powders, a nano-silver antibacterial agent, a nano silicon oxide and fluorescent powders; and secondly, blending and spinning the master batch, the PBT, polyethylene glycol terephthalate (PET) or polytrimethylene terephthalate (PTT) to prepare the functional polyester fibers. According to the method, the reactive extrusion process is adopted, the operation is simple and convenient, the process flow is shortened greatly, the obtained PBT functional master batch contains 30wt%-40wt% of the functional powders, and can be well dispersed in a base body, the compatibility of the obtained functional master batch and polyester polymer is good, and the fiber obtained by the method has an obvious functional effect.

The invention provides an engineering plastic with high wearing resistance. The engineering plastic is made from the following raw materials by weight: 80-100 parts of polyformaldehyde, 20-40 parts of polyamide, 20-50 parts of polycarbonate, 25-40 parts of acrylonitrile-butadiene-styrene copolymer, 10-30 parts of epoxy resin, 12-20 parts of polytrimethylene terephthalate, 1-5 parts of diphenylmethane bismaleimide, 10-15 parts of polyphenyl ether, 20-40 parts of polyether-ether-ketone, 10-20 parts of polytetrafluoroethylene, 5-10 parts of melamine, 4-12 parts of boric acid alkanolamide, 2-6 parts of polyethylene glycol, 4-12 parts of phenolic ether phosphomonoester, 5-15 parts of polymethyl methacrylate, 10-20 parts of organic silicone oil, 5-10 parts of silane coupling agent, 3-5 parts of zinc stearate, 10-20 parts of glass fibre, 12-20 parts of graphite, 5-10 parts of silicon carbide whisker, 5-8 parts of nanometre titanium oxide, 4-6 parts of diphenyl ketone, 3-8 parts of butylated hydroxyanisole and 15-30 parts of filler. The engineering plastic provided by the invention has a good wear-resisting property.

The invention relates to a composite elastic filament core-spun yarn fabric and a preparation method thereof. The wefts of the composite elastic filament core-spun yarn fabric are elastic filament core-spun yarns, the warps of the composite elastic filament core-spun yarn fabric are elastic filament core-spun yarns or non-elastic yarns, and the elastic filament core-spun yarn is prepared from a PTT(polytrimethylene terephthalate)/PET (polyethylene terephthalate) parallelly composite elastic filament serving as a core yarn and natural fibers and/or chemical fibers serving as coating fibers, wherein the weight ratio of the core yarn to the coating fiber is (3:7)-(7:3). The weft flotation line of the fabric has 1-4 intersection points, and the fabric is prepared by virtue of a core-spun yarn spinning process, a weaving process and a dyeing and finishing process. The fabric is prepared by coating the PTT/PET parallelly composite elastic filament with cotton fibers and the like with good comfortability, thereby meeting the requirements of elasticity and comfortability. In the subsequent processing and using of the fabric, the elastic structure of the product provided by the invention is not destroyed by mechanical, thermal and chemical conditions. Therefore, the product provided by the invention has the advantage of durable weft-direction elasticity.

An ester-forming monomer obtained by depolymerization of polytrimethylene terephthalate and having an acrolein content of no greater than 0.5 wt %. Polymers obtained using the monomer and fibers, films and molded articles comprising the polymers. The ester-forming monomer is obtained by reacting polytrimethylene terephthalate with at least one compound selected from among monoalcohols, 1,3-propanediol and water in the presence of a basic substance. When the recovered ester-forming monomer is used as the starting material for production of a polymer, it is possible to produce a molding polymer for fibers, films and the like with quality equivalent to or higher than that obtained using virgin monomer.

This invention relates to a continuous process for production of poly(trimethylene terephthalate), wherein gaseous 1,3-propanediol by product resulting from the process is condensed in a condenser, and a portion of the condensed by-product is recycled back into the process.

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.

A process for preparing poly(trimethylene dicarboxylate) multifilament yarns and monofilaments. One process for preparing poly(trimethylene dicarboxylate) multifilament yarns includes (a) providing a polymer blend including poly(trimethylene dicarboxylate) and about 0.1 to about 10 weight % styrene polymer, by weight of the polymer in the polymer blend, (b) spinning the polymer blend to form poly(trimethylene dicarboxylate) multiconstituent filaments containing dispersed styrene polymer, and (c) processing the multiconstituent filaments into poly(trimethylene dicarboxylate) multifilament yarn including poly(trimethylene dicarboxylate) multiconstituent filaments containing styrene polymer dispersed throughout the filaments. Another process includes spinning at a speed of at least 3,000 m/m and processing a blend including poly(trimethylene dicarboxylate) to form partially oriented poly(trimethylene dicarboxylate) multifilament yarn. A poly(trimethylene terephthalate) yarn including poly(trimethylene terephthalate) multiconstituent filament containing styrene polymer dispersed throughout the multiconstituent filament. The invention is also directed to uses of the filament yarns and monofilament.

The invention relates to a production method of seamless knitted garments adopting polytrimethylene terephthalate fibre, including the steps of (1) selecting raw materials according to product purposes, requirement of style and performance and characteristics of the raw materials; (2) establishing textile technology and weaving garment blank by a knitting machine; (3) according to colored woven garment and grey garment sorting and making a finishing process flow; (4) confirming key finishing process parameter. The finished PTT seamless knitted garments by adopting the invention have soft texture, good extensibility, good rebound elasticity, and are comfortable and beautiful; the elasticity in particular lasts long; compared with the existing products made of nylon and spandex, the product has incomparable advantage in chlorine fastness, sun fastness and high-temperature processing resistance, etc., which leads possible extended application of the seamless knitted garments to high grade swimwear, sportswear, high temperature printing, etc.

The invention provides a bi-component sheath-core composite high-stretch fiber. The bi-component is a polyester component and a polyamide component respectively, wherein the polyamide component forms an outer sheath part; the polyester component forms an inner core part; the outer sheath part is coated around the inner core part; and the polyester component may be one or more of a cationic normal-pressure dyeable polyester, a polytrimethylene terephthalate and a polybutylene terephthalate. As the bi-component sheath-core composite high-stretch fiber provided by the invention utilizes a polyester of which a molecular chain has flexible branched chains, such as the cationic normal-pressure dyeable polyester, the polytrimethylene terephthalate, the polybutylene terephthalate and the like, the prepared composite fiber is looser, and dyes can enter the fiber more easily to achieve higher dying performance under a conventional dying condition. The invention also provides a preparation method for the bi-component sheath-core composite high-stretch fiber.

The invention provides a high elasticity fiber, which is a bicomponent composite fibre. One component of the bicomponent composite fiber is synthetic high contractility copolyester HSPET, which is prepared with terephthalic acid, m-phthalic acid, glycol and neopentyl glycol through esterification and polycondensation reaction; and the other component of the bicomponent composite fiber is polytrimethylene terephthalate. After the bilateral composite fiber is heated, a helical tridimensional curled structure is got so that the fiber has excellent elastic elongation and elastic recovery. The bicomponent composite fiber is a novel functional fibrous material applicable for weaving elastic textiles.

Polytrimethylene terephthalate which has a low content of a cyclic dimer and hardly produces the cyclic dimer when it is melt molded and a fiber made from the polytrimethylene terephthalate.

Polytrimethylene terephthalate (A) is essentially composed of a trimethylene terephthalate unit, has an intrinsic viscosity of 0.5 to 1.6 dl/g and contains 0.01 to 0.5 wt % of a compound represented by the following formula (I) or (II):

(R₁, R₂ and R₃ are the same or different hydrocarbon groups having 1 to 10 carbon atoms, n is an integer of 1 to 5, M is an alkali metal atom or alkali earth metal atom, and m is 1 when M is an alkali metal atom and 2 when M is an alkali earth metal atom),

(R₄ and R₅ are the same or different and each a hydrogen atom or hydrocarbon group having 1 to 10 carbon atoms).

The invention discloses a preparation method of novel wool-like differential fibers, which is characterized by comprising the following steps of: 1) adopting polytrimethylene terephthalate (PTT) as a raw material to prepare a pre-oriented yarn (a); 2) adopting modified high-shrinkage polyester as a raw material to prepare fully-drawn high boiling water shrinkage fibers (b); and 3) on a DTY machine, passing the pre-oriented yarn (a) through a roller, a hot box and a cooling plate, performing drawing false twisting on the pre-oriented yarn on a false twister, converging the pre-oriented yarn with the high boiling water shrinkage fibers (b) in front of two rollers, and performing network compounding on the pre-oriented yarn and the high boiling water shrinkage fibers, and then passing the pre-oriented yarn and the high boiling water shrinkage fibers through two hot boxes to obtain a composite yarn product. The preparation method develops the novel wool-like differential fibers, the PTT fibers floating on the surface layer are much closer to wool fibers in performance and are superior to common wool-like products in the performance of elastic recovery, handfeel, antistatic property, dyeing and the like, and simultaneously, the treatment of forming different sections of the two raw materials ensures that the products have significant improvements on luster and fibrillation resistance.

The invention relates to a production method for water-based polyurethane elastic chammy suede leather. The procedure is that a. polyurethane is coated to the elastic island substrate of chammy suede; b. it is dried and formed by hot setting machine; c. chammy suede leather is made by roughing. Wherein, the substrate in a step is PTT/PET island chammy suede with PTT island component. Said coating process for polyurethane is that the substrate is set in dipping tank with aqueous polyurethane dispersion and dipped. By the dipping operation for substrate by polyurethane, it decreases freezing, water washing procedures compared with original technology that the leather is dried directly in hot setting machine after dipped. The production cost is lessened and pollution is decreased largely because a mass of organic media is spared. Compared with chammy suede fabric made by island fiber with nylon or nylon6, chosen substrate made by island fiber with PTT is provided with good elastic expansion.

The invention relates to a manufacturing method of an antibacterial deodorizing polyester fiber, which comprises the following steps of: compounding zinc oxide whiskers with sterilizing and antibacterial functions, palygorskite fibers and various antibacterial agents with different antibacterial effects into a broad-spectrum antibacterial agent; preparing the broad-spectrum antibacterial agent and ethanediol into antibacterial ethanediol in the presence of a tiny amount of sodium hexametaphosphate; when polymerization esterification rate reaches 85%-90%, adding the antibacterial ethanediol to a polycondensation kettle, and polymerizing to prepare a copolyester antibacterial polyester, or blending and fusing the broad-spectrum antibacterial agent and the conventional polyester to prepare a blended antibacterial polyester; and fusing, compounding and spinning the antibacterial polyester as a shell layer and PET (Polyethylene Terephthalate) and PTT (polytrimethylene Terephthalate) serving as a core layer together to obtain the shell-core antibacterial deodorizing polyester fiber.

The invention relates to a catalyst used for preparation of polyester, a preparation method and application thereof. The catalyst mainly solves the problem of absence of the catalyst with high catalytic activity in the stages of esterification and polycondensation of polytrimethylene terephthalate in the prior art. A technical scheme of the invention adopts reaction products which comprise the following components: a) a titanium compound, b) a hydroxyl compound, c) organic metal salt, and d) a phosphorus compound; the preparation method for the catalyst comprises the following steps: subjecting the titanium compound and the hydroxyl compound to reaction at 0 to 200 DEG C for 0.1 to 24 hours so as to obtain an intermediate product, adding the metal organic salt and the phosphorus compound into the obtained intermediate product, and carrying out reaction at 0 to 200 DEG C for 0.1 to 24 hours so as to obtain the catalyst used for preparation of polyester; thus, the problem is well solved, and the catalyst can be applied in preparation of polytrimethylene terephthalate, polyethylene terephthalate and polybutylene terephthalate.

A flame retardant polymer composition and a process for making the composition are provided. The flame retardant polymer composition is a poly(trimethylene terephthalate) co-polymer containing a trimethylene terephthalate monomer and a phosphorous containing flame retardant monomer. The flame retardant polymer composition is produced by a process in which the trimethylene terephthalate monomer or its precursors and the phosphorous containing flame retardant monomer or its precursors are combined to form the poly(trimethylene terephthalate) co-polymer in one or more pre-polymerization and polymerization steps.

A composition comprising a polytrimethylene terephthalate random copolymer that (1) is derived from polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and (2) contains at least one residue derived from the polyethylene terephthalate component. Methods for making such copolymers and articles made from such copolymers.

The present invention discloses one kind of polyester polar fleece fabric with polypropanediol terephthalate as material and its production process. The polyester polar fleece fabric has facing material of polypropanediol terephthalate yarn or filament and foundation material of other natural or synthetic fiber yarn or filament, and knitted. The polyester polar fleece fabric with polypropanediol terephthalate has soft hand feeling, high loft and elasticity, high dirt resistance, good fuzz resistance and excellent antistatic performance.

The invention discloses a production method of PTT/PET parallel composite elastic short fibers without mechanical crimping. The production method comprises the following steps: (1) performing crystallization and drying and melted extrusion on two raw materials, including a modified PET raw material a and a polytrimethylene terephthalate raw material b, with different properties; entering a spinning manifold and a high-volume double-channel composite spinning assembly for compounding to obtain filament bundles in parallel shapes; spinning, annular blowing cooling, oiling, winding and falling into a barrel to prepare a PTT/PET parallel composite elastic short fiber primary filament c; and (2) performing bundling, stretching, oiling, tension heat setting and cutting the primary filament c and feeding into a packaging machine to be packaged. Because the special high-volume double-channel composite spinning assembly and a multi-roller tension heat setting device are adopted, and a crimping device and a loosening heat setting machine in production of conventional polyester short fibers are eliminated, the parallel composite elastic short fibers prepared by using the method are moderate in elasticity and high in stretching resilience and have a good hand feeling.