Produits et services

Raw fibrous textile; textile fibers; plastic fibers for textile use [fibres]; flock [stuffing].

Abrégé

A method for preparing low-melting-point recycled polyester used for sheath-core polyester. The low-melting-point recycled polyester is prepared by degradation and polycondensation of the following raw materials: a. recycled raw materials; b. methanol; c. one or more of zinc acetate, potassium acetate, manganese acetate, magnesium acetate, lead acetate, cobalt chloride, tetrabutyl titanate, tetraisopropyl titanate, and dibutyl dilaurate; d. one or more of isophthalic acid, adipic acid, and sebacic acid; e. one or more of neopentyl glycol, hexanediol, butanediol, and polyethylene glycol; f. catalyst antimonous oxide and cobalt acetate; and g. stabilizer trimethyl phosphate. The low-melting-point recycled polyester can be used for preparing sheath-core polyester staple fiber, and the prepared polyester staple fiber can be used for making nonwoven, flocking, and a compound material.

Classes IPC  ?

• D01F 8/14 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyester comme constituant
• D01D 5/34 - Structure "âme-gaine"Ensembles de filage à cet effet
• C08J 11/24 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec une substance organique par traitement avec des composés organiques contenant de l'oxygène contenant des groupes hydroxyle
• C07C 29/128 - Préparation de composés comportant des groupes hydroxyle ou O-métal liés à un atome de carbone ne faisant pas partie d'un cycle aromatique à six chaînons par alcoolyse
• C07C 69/82 - Esters d'acide téréphtalique

Abrégé

Disclosed are a method for preparing high-melting-point recycled polyester used for sheath-core polyester staple fiber layer, and an application thereof. The high-melting-point recycled polyester uses recycled polyester, whose main component is polyester bottle flakes, as the raw material and is prepared by the following process: recycled raw materials—cleaning—proportioning—drum drying—multi-level filtering—liquid tackifying, wherein the temperature during the drum drying ranges from 100°C to 150°C, and the drying duration ranges from 7h to 10h. The obtained high-melting-point recycled polyester can be used for preparing sheath-core polyester staple fiber, thereby improving the additional value of preparing the recycled polyester staple fiber with polyester waste; moreover, the prepared sheath-core recycled polyester staple fiber is of stable and good quality, and can be used for making nonwoven, flocking, and a compound material.

Classes IPC  ?

• C08J 11/04 - Récupération ou traitement des résidus des polymères
• D01F 8/14 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyester comme constituant
• C08G 63/78 - Procédés de préparation

Abrégé

The invention relates to a skin-core type recycled polyester staple fiber and a preparation method thereof. The recycled polyester staple fiber is formed by a skin layer and a core layer. The skin layer is low-melting-point recycled polyester, a melting point of the low-melting-point recycled polyester is 70-160℃, content of the carboxylic end group is smaller than or equal to 35 mmol/kg, and the intrinsic viscosity is 0.5-1.0 dL/g. The core layer is high-melting point recycled polyester, a melting point of the high-melting-point recycled polyester is 250-270℃, content of the carboxylic end group is smaller than or equal to 20 mmol/kg, and the intrinsic viscosity is 0.7-1.0 dL/g. The two types of polyester fusant enter a composite spinning component after being metered by a metering pump thereof; the fusant jetted from a spinneret plate of the composite component is cooled, wound, bundled, drawn, sized, cut off, and packaged to obtain the skin-core type recycled polyester staple fiber. The skin-core type recycled polyester staple fiber prepared by using the method of the present invention is stable and excellent in quality.

Classes IPC  ?

• C08G 63/183 - Acides téréphtaliques
• C08G 63/181 - Acides contenant des cycles aromatiques
• C08G 63/672 - Acides dicarboxyliques et composés dihydroxylés
• C08J 11/24 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec une substance organique par traitement avec des composés organiques contenant de l'oxygène contenant des groupes hydroxyle
• D01F 8/14 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyester comme constituant
• D01D 5/34 - Structure "âme-gaine"Ensembles de filage à cet effet

Abrégé

The present invention relates to a method for producing a low-melting point recycled polyester for use in production of a sheath-core polyester by hydrolytic degradation. The low melting point recycled polyester is prepared from the following raw materials by means of degradation and concentration reactions: a. a recycled raw material; b. water; c. one or more among zinc acetate, potassium acetate, manganese acetate, magnesium acetate, lead acetate, cobalt chloride, cobalt chloride, tetrabutyl titanate, tetraisopropyltitanate, and butanediylbis dilaurate; d. one or more among isophthalic acid, adipic acid, and sebacic acid; f. catalysts antimony trioxide and cobalt acetate; and, g. stabilizer trimethyl phosphate. The low melting point recycled polyester of the present invention can be used for producing a sheath-core polyester staple fiber, and increases the value added of polyester wastes in producing recycled polyester stable fibers, and the sheath-core recycled polyester staple fiber produced has the advantages of a stable mass and great quality.

Classes IPC  ?

• C08G 63/183 - Acides téréphtaliques
• C08G 63/181 - Acides contenant des cycles aromatiques
• C08G 63/672 - Acides dicarboxyliques et composés dihydroxylés
• C08J 11/24 - Récupération ou traitement des résidus des polymères par coupure des chaînes moléculaires des polymères ou rupture des liaisons de réticulation par voie chimique, p. ex. dévulcanisation par traitement avec une substance organique par traitement avec des composés organiques contenant de l'oxygène contenant des groupes hydroxyle
• D01F 8/14 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyester comme constituant
• D01D 5/34 - Structure "âme-gaine"Ensembles de filage à cet effet

Abrégé

The present invention relates to a sheath-core polyester staple fiber employing a recycled polyester as a core layer and a method for manufacturing the fiber. The recycled polyester staple fiber is constituted by a sheath layer and the core layer. The sheath layer is a low-melting point polyester, where the melting point of the modified low-melting point polyester is between 70 °C and 160 °C, the terminal carboxyl content is ≤ 35 mmol/kg, and the intrinsic viscosity is between 0.5 dl/g and 1.0 dl/g. The sheath layer is the recycled polyester, where the melting point of the recycled polyester is between 250 °C and 270 °C, the terminal carboxyl content is ≤ 20 mmol/kg, and the intrinsic viscosity is between 0.6 dl/g and 1.0 dl/g. The two types of polyesters are measured via respective measuring pumps and then introduced into a compounding spinning component, and a melt extruded from a spinneret of the compounding spinning component is cooled, winded, bundled, stretched, shaped, cut, and packaged, thus manufacturing the sheath-core polyester staple fiber employing the recycled polyester as the core layer. The sheath-core polyester staple fiber employing the recycled polyester as the core layer manufactured per the present invention has a stable mass and great quality.

Classes IPC  ?

• D01F 8/14 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyester comme constituant
• D01D 5/34 - Structure "âme-gaine"Ensembles de filage à cet effet
• C08G 63/183 - Acides téréphtaliques
• C08G 63/86 - Germanium, antimoine ou leurs composés
• C08G 63/82 - Procédés de préparation caractérisés par le catalyseur utilisé
• C08G 63/78 - Procédés de préparation

Abrégé

The invention relates to a skin-core type recycled polyester staple fiber and a preparation method thereof. The recycled polyester staple fiber is formed by a skin layer and a core layer. The skin layer is low-melting-point recycled polyester, a melting point of the low-melting-point recycled polyester is 70-160℃, content of the carboxylic end group is smaller than or equal to 35 mmol/kg, and the intrinsic viscosity is 0.5-1.0 dL/g. The core layer is high-melting point recycled polyester, a melting point of the high-melting-point recycled polyester is 250-270℃, content of the carboxylic end group is smaller than or equal to 20 mmol/kg, and the intrinsic viscosity is 0.7-1.0 dL/g. The two types of polyester fusant enter a composite spinning component after being metered by a metering pump thereof; the fusant jetted from a spinneret plate of the composite component is cooled, wound, bundled, drawn, sized, cut off, and packaged to obtain the skin-core type recycled polyester staple fiber. The skin-core type recycled polyester staple fiber prepared by using the method of the present invention is stable and excellent in quality.

Classes IPC  ?

• D01F 8/14 - Filaments, ou similaires, faits par l’homme, conjugués, c.-à-d. à plusieurs composantsLeur fabrication à partir de polymères synthétiques avec au moins un polyester comme constituant
• D01D 5/34 - Structure "âme-gaine"Ensembles de filage à cet effet
• D01D 5/08 - Méthodes de filage à partir de masses en fusion
• C08G 63/183 - Acides téréphtaliques
• C08G 63/78 - Procédés de préparation

Abrégé

A device for effectively separating paper sheets mixed in bottle chips during a PET bottle chip raw material treatment process in the chemical fiber industry, i.e. a device for separating paper sheets from bottle chip raw materials, comprises a feeding unit, a cyclone separator (4), a suction fan (6) and a paper sheet collector (7). The feeding unit is comprised of a feeding hopper (1), a centrifugal fan (2) and a conveying air pipe (3). The cyclone separator (4) is connected to the tail end of the conveying air pipe (3). A discharge port is arranged at the lower end of the cyclone separator (4), and a suction pipe (5) is connectedly arranged at the upper end of the cyclone separator (4). The suction pipe (5) is connected to the suction fan (6) arranged in the paper sheet collector (7). The device well solves the problem of low efficiency in separating the paper sheets by manual operation, and can separate the PVC paper sheets mixed in the PET bottle chips automatically.

Classes IPC  ?

• B29B 17/02 - Séparation de matières plastiques des autres matières
• B07B 7/083 - Séparation sélective des matériaux solides portés par des courants de gaz, ou dispersés dans ceux-ci utilisant la force centrifuge produite par la rotation d'ailettes, de disques, de tambours ou de brosses

Produits et services

Raw fibrous textile, textile fibers, plastic fibers for textile use (fibers), flock (stuffing).