公开(公告)号：US3849044A

公开(公告)日：1974-11-19

申请号：US31379872

申请日：1972-12-11

Applicant: KANEGAFUCHI SPINNING CO LTD ,  SNIA VISCOSA

Inventor： ANDO S ,  MATSUI M ,  OGATA F

IPC: B29C47/06 ,  D01D5/30 ,  D01D3/00

CPC classification number: B29C47/128 ,  B29C47/0014 ,  D01D5/30 ,  Y10T428/2929 ,  Y10T428/2973

Abstract: Production of a two-component unitary filament having a given uniform cross-sectional configuration and comprising sheath and core portions consisting of a first and a second synthetic polymers respectively, and produced by separately fluidifying said polymers and simultaneously and concurrently feeding both polymers through a common spinneret orifice for extruding therefrom a composite filament, wherein the said second polymers forms a part of its cross-section, said part being both inwardly and outwardly enclosed by said first polymer and its major portion is located outside the concentric one-half similar shape of the cross-section of the filament.

公开(公告)号：US3787481A

公开(公告)日：1974-01-22

申请号：US3787481D

申请日：1969-04-07

Applicant: SNIA VISCOSA

Inventor： SICLARI F ,  MADERNO C ,  MAGNONI F ,  FULMINI S

IPC: C08G63/00 ,  B01J10/02 ,  B01J14/00 ,  B01J19/18 ,  C08G63/78 ,  C08G85/00 ,  C07C69/82

CPC classification number: B01J19/1887 ,  B01J10/02 ,  B01J19/1881 ,  B01J2219/0009 ,  B01J2219/00094 ,  C07C67/08 ,  C07C67/54 ,  C07C69/82

Abstract: A DEVICE FOR CONTINUOUSLY PERFORMING CHEMICAL PROCESSES AND REACTIONS WHICH REQUIRE HEAT ADMINISTRATION FROM THE OUTSIDE AND ARE CONDUCTIVE TO THE EVOLUTION OF VOLATILE BY-PRODUCTS, SUCH AS THE PROCESSES LEADING TO THE PRODUCTION OF SPINNABLE POLYESTERS. THE DEVICE COMPRISES A REACTOR HAVING SUBSTANTIALLY VERTICAL METAL WALLS, MEANS FOR INTRODUCING THE REACTANT AND THE REACTED PRODUCT WHICH IS RECYCLED AT THE REACTOR TOP, CENTRIFUGING MEANS FOR HURLING THE PRODUCTS INTRODUCED AT THE TOP OF SAID WALLS FOR CAUSING THEM TO DESCEND IN THE FORM OF A LIQUID FILM THEREALONG, AND MEANS FOR RECYCLING A FRACTION OF THE PRODUCT WHICH HAS BEEN COLLECTED AT THE BASE OF THE REACTOR, TOWARDS THE TOP THEREOF. A CHEMICAL PROCESS UTILIZING SUCH A REACTOR AND INVOLVING THE REMOVAL OF THE BY-PRODUCTS, SET FREE IN THEIR VOLATILE FORM AT THE TOP OF THE REACTOR AS THEY ARE EVOLVED AND SET FREE FROM SAID LIQUID FILM.

公开(公告)号：US3644294A

公开(公告)日：1972-02-22

申请号：US3644294D

申请日：1969-04-04

Applicant: SNIA VISCOSA

Inventor： SICLARI FRANCESCO ,  MAGNONI FRANCO ,  MADERNO CESANO

IPC: C08G63/00 ,  B01J10/02 ,  B01J14/00 ,  B01J19/18 ,  C08G63/78

CPC classification number: C08G63/785 ,  B01J10/02 ,  B01J19/1862 ,  B01J19/1881 ,  B01J19/1887 ,  B01J2219/0009 ,  B01J2219/00094 ,  Y10S159/10

Abstract: A PROCESS FOR CONTINUOUS PRODUCTION OF A SPINNABLE POLYESTER INCLUDING A PLURALITY OF STEPS OF PRECONDENSATION OAND OF PROGRESSIVE CONDENSATION ACCOMPANIED BY REMOVAL OF GASEOUS CO-PRODUCTS. THE INDIVIDUAL STEPS ARE CARRIED ON APPLYING THIN-LAYER TECHNIQUE WITHIN SEPARATE ENVIRONMENTS AT DIFFERING TEMPERATURE AND PRESSURE CONDITIONS AND WHEREIN THE WALLS DEFINING SAID ENVIRONMENTS ARE SO HEATED TO MAINTAIN THE TEMPERATURE GRADIENT AT THE INTERFACE OF WALL AND LIQUID THIN LAYER WITHIN A SMALL VALUE PREFERABLY NOT GREATER THAN 6*C., AND THE SAID LIQUID THINLAYER IN EACH ENVIRONMENT PREVAILINGLY CONSISTS OF PARTIALLY REACTED PRODUCT RECYCLED IN SAME ENVIRONMENT. AN EQUIPMENT COMRPISING A PLURALITY OF REACTION ENVIRONMENTS, RECYCLING MEANS AND SURFACE HEAT-EXCHANGING MEANS FOR CARRYING OUT THE PROCESS.

公开(公告)号：US3620904A

公开(公告)日：1971-11-16

申请号：US3620904D

申请日：1970-07-23

Applicant: SNIA VISCOSA ,  KANEGAFUCHI SPINNING CO LTD

Inventor： TAMURA YOSHIO ,  ANDO SATOSHI

IPC: D01F8/12 ,  D02G3/02

CPC classification number: D01F8/12 ,  Y10T428/2931 ,  Y10T428/2969

Abstract: Production of polyamide composite filament having high crimpability, one component of which is polycapramide and the other component of which is a copolyamide consisting of 0.01 to 5 percent by weight of nylon salt composed of a dicarboxylic acid and a polyfunctional diamine having the general formula H2N-(CH2)n-R(CH2)n-NH2 wherein R is > C O and n is 3 to 11, 3 to 20 percent by weight of another nylon salt and 75 to 95 percent by weight of polycapramide forming components.

公开(公告)号：US3614817A

公开(公告)日：1971-10-26

申请号：US3614817D

申请日：1969-07-01

Applicant: SNIA VISCOSA

Inventor： NICITA DOMENICO ,  MADERNO CESANO ,  LUZZATTO ETTORE

IPC: D02J1/00 ,  D02J1/08 ,  D02G1/16

CPC classification number: D02J1/08

Abstract: A METHOD AND A DEVICE ARE DISCLOSED FOR IMPROVING THE COHESION BETWEEN INDIVIDUAL MONOFILAMENTS OF A COHERED YARN. THE METHOD CONSISTS IN LIMITING THE FREEDOM OF OSCILLATORY MOVEMENT OF THE INDIVIDUAL FILAMENTS AS EXPOSED TO THE ACTION OF A COHERING GAS JET, AND IS CARRIED OUT BY PROVIDING A GROOVED OR SPLINED CYLINDRICAL SURFACE IN THE AREA WHERE THE GAS JET IS ACTIVE ON THE FILAMENTS. THE DIMENSIONS, AND THE DISTANCES AT WHICH THE CYLINDRICAL SURFACE IS PLACED WITH RESPECT TO THE OTHER COMPONENT PARTS OF THE INSTALLATION ARE CRITICAL.

公开(公告)号：US3602459A

公开(公告)日：1971-08-31

申请号：US3602459D

申请日：1969-07-14

Applicant: SNIA VISCOSA

Inventor： PESARINI MARIO ,  GALEAZZI PIERO ,  TOSTI CARLO

IPC: F42B10/14 ,  F42B13/32

CPC classification number: F42B10/14

Abstract: A retractable tail unit for guiding projectiles, which unit includes an idle bushing mounted in the rear part of the cylindrical body of the projectile. The bushing has the same diameter as the outer diameter of convergent and divergent composite body portions of said cylindrical body, all being axially aligned with said body. A plurality of substantially trapezoidal shaped blades are pivot mounted at one end on a pivot pin mounted slantwise on the bushing, with the blades in their ''''closed'''' position lying flat tangentially to coextensive portions of the bushing and of the convergent portion of the cylindrical body of the projectile, and parallel to the axis thereof. The blades, when in their ''''closed'''' position, are contained within a circular ring area or recess defined by or between a combination of the body of the convergent portion and of the bushing, and by the outer diameter of the cylindrical body of the projectile. The center of gravity of these blades, as a result of the axial acceleration in the initial launching stage, is so displaced as to cause a moment on the blades which effects the opening and the extension of each blade about the slanting or canted pivot pin, the blades thus placing themselves radially with respect to the axis of the cylindrical body of the projectile, at the desired attachment angle.

公开(公告)号：US3582244A

公开(公告)日：1971-06-01

申请号：US3582244D

申请日：1969-12-08

Applicant: SNIA VISCOSA

Inventor： SICLARI FRANCESCO ,  MARAFIOTI LUIGI ,  MAGNONI FRANCO

IPC: B29B7/26 ,  C08F2/00 ,  F04C2/16 ,  F04C13/00 ,  F01C1/16 ,  F01C21/06

CPC classification number: F04C2/165 ,  B29B7/26 ,  F04C2/16 ,  F04C13/002

Abstract: A device for volumetrically removing liquids from vacuum operating equipments, particularly reaction vessels and equipments for obtaining polymers, comprising a set of mutually engaging pumping screws, a number of which extend to the inside of the vacuum equipment for a given length, while the remaining screw or screws extend only up to the bottom of said vacuum equipment. Said set of screws is rotatably driven within a body tightly enclosing the same.

公开(公告)号：US3558702A

公开(公告)日：1971-01-26

申请号：US3558702D

申请日：1967-11-24

Applicant: SNIA VISCOSA

Inventor： PASIN ALBERTO ,  MADERNO CASANO ,  BORGO SILVANO

IPC: C07C233/00 ,  C07C103/36

CPC classification number: C07C233/00 ,  Y10S526/912

Abstract: A METHOD IS DISCLOSED FOR PURIFYING DIMETHYLFORMAMIDE, WHICH HAS BEEN OBTAINED BY RECOVERY THEREOF IN SUBSTANTIALLY NON-AQUEOUS CONDITION FROM A PROCESS FOR SPINNING ACRYLONITRILE POLYMERS AND COPOLYMERS TO PRODUCE FIBERS AND YARNS, COMPRISING TREATING THE IMPURE DIMETHYLFORMAMIDE BY CONTACTING IT WITH TWO DIFFERENT ION-EX CHANGE RESINS WHICH ARE INSOLUBLE IN DIMETHLFORMAMIDE, ONE OF WHICH IS SELECTED FROM THE GROUP OF STRONGLY ACIDIC RESINS CONSISTING OF SULPHONATED STYRENE-DIVINYL BENZENE COPOLYMERS, AND THE OTHER OF WHICH IS SELECTED FROM THE GROUP CONSISTING OF RESINS HAVING QUATERNARY AMMONIUM GROUPS IN HYDROXIDE FORM AND OF RESINS HAVING ALIPHATIC AMINO GROUPS.

公开(公告)号：US3548028A

公开(公告)日：1970-12-15

申请号：US3548028D

申请日：1968-02-02

Applicant: KANEBO LTD ,  SNIA VISCOSA

Inventor： ITABASHI YOSHIO ,  SEKII MASAO

IPC: C08L77/00 ,  D01D5/22 ,  D01F6/60 ,  D01F8/12 ,  C08G41/04

CPC classification number: C08G69/36 ,  C08L77/02 ,  C08L77/06 ,  D01D5/22 ,  D01F6/80 ,  C08L23/06 ,  C08L23/12

公开(公告)号：US3526019A

公开(公告)日：1970-09-01

申请号：US3526019D

申请日：1967-06-21

Applicant: KANEBO LTD ,  SNIA VISCOSA

Inventor： MATSUI MASAO ,  FUJITA KENTARO ,  IWAMOTO KAZUKIYO

IPC: D01D5/32 ,  D01D1/10

CPC classification number: D01D5/32 ,  Y10S425/217