公开(公告)号：PT68658A

公开(公告)日：1978-11-01

申请号：PT6865878

申请日：1978-10-16

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: D06B15/00 ,  F26B13/28 ,  F26B15/12

Abstract: The removal of water from viscose rayon yarns in the continuous spinning of such yarns is improved by subjecting the yarns to the action of an air jet before the thermal drying treatment. The air jet impinges on the yarns adjacent their passage from the last liquid treatment zone to the drying zone and is directed approximately tangentially to the treatment roller, that is to the helicoidal path of the yarn. The removal of the water is completed by thermal drying. Up to 50% of the water content, and several times the dry weight of the yarn, is eliminated by the pneumatic treatment. The air jet is directed on the yarn by means of a slit-shaped nozzle having its larger dimension substantially parallel to the treatment roller. A plurality of yarns can be treated concurrently on the same device having a plurality of guide rollers.

公开(公告)号：PT72235A

公开(公告)日：1981-01-01

申请号：PT7223580

申请日：1980-12-18

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: A41B11/14 ,  D04B1/14 ,  D01F

公开(公告)号：PT71898A

公开(公告)日：1980-11-01

申请号：PT7189880

申请日：1980-10-10

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: C07D201/16 ,  B01J19/18 ,  C07D201/08 ,  C07D201/10 ,  C07C

公开(公告)号：PT71909A

公开(公告)日：1980-11-01

申请号：PT7190980

申请日：1980-10-13

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: F42B7/10 ,  F42B

Abstract: A projectile for a smooth bore gun includes a metal bullet, substantially made of lead, and a wad-flight control element of plastic material. The bullet is constituted by a metal body provided with an ogive with centering fins and comprises one or more cylindrical segments. The wad-flight control element comprises a container, connected to the bullet and containing the same, an amortizing portion and a cup for sealing off propellant gases. The amortizing portion and the sealing cup act to control the projectile during flight.

公开(公告)号：PT71377A

公开(公告)日：1980-07-01

申请号：PT7137780

申请日：1980-06-12

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: D01F2/06 ,  C08B9/00 ,  D01F2/00 ,  D01D

Abstract: A process for the xanthation of alkali-cellulose comprises the reaction of the alkali-cellulose with CS2 in excess with respect to the desired xanthate substitution degree at a pressure which increases from the initial 110 mm Hg to about 400-500 mm Hg and at a temperature increasing from about 21 DEG C. to about 23 DEG -25 DEG C. The unreacted CS2 is removed from the reactor, once the desired xanthate substitution degree is reached, by application of a vacuum. This viscose rayon continuous spinning process eliminates the need for the usual desulphuration phase for decreasing the sulphur content and for bleaching the product. The viscose obtained has reduced content of compounds capable of forming elementary sulphur. The regenerated cellulose yarn has improved characteristics as to the sulphur content and degree of whiteness.

公开(公告)号：PT69717A

公开(公告)日：1979-07-01

申请号：PT6971779

申请日：1979-06-01

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: D06M15/53 ,  C08G73/06 ,  D06M13/02 ,  D06M13/184 ,  D06M13/188 ,  D06M13/203 ,  D06M13/224 ,  D06M13/244 ,  D06M13/282 ,  D06M13/292 ,  D06M101/00 ,  D06M101/02 ,  D06M101/06 ,  D06M101/08 ,  D01D

Abstract: A finish composition is disclosed for facilitating cotton type spinning of crimped cellulosic fibres comprising: (A) about 10-30% of an ester of a fatty acid with fatty alcohols; (B) about 8-15% of a partial ester of phosphoric acid, wherein part of the acid groups are free or salified; (C) about 50-70% of an oxyalkylated fatty acid; (D) up to 0.5% of a hydrosoluble organic or inorganic alkali metal salt; and (E) the balance to 100% of an alkali metal salt of a fatty acid with 6-20 carbon atoms.

公开(公告)号：PT69425A

公开(公告)日：1979-05-01

申请号：PT6942579

申请日：1979-04-02

Applicant: SNIA VISCOSA ,  SCOSA SPA

IPC: D01D13/00 ,  D01D13/02 ,  D01H

Abstract: A device for the continuous spinning of viscose rayon includes a main or processing roller and a plurality of secondary or advancing rollers set askew with respect to the processing roller. The processing and advancing rollers are carried bracket-like by a support arm in which they are rotatively supported. The actuating structures are located in the vicinity of the supports of the respective rollers. The support arm is hollow and contains the roller supports and the actuating structures, and is located at the end of the unit at which the yarns leave the same after being processed. A plurality of spinning units are arranged in rows and the rows are born by a frame carrying all the necessary accessory devices. Means are provided for preventing the escape of fumes from the treatment liquors into the surrounding room.