公开(公告)号：US3876446A

公开(公告)日：1975-04-08

申请号：US32521473

申请日：1973-01-19

Applicant: BASF AG

Inventor： BLECKMANN GERHARD ,  SANNER AXEL ,  SCHLEMMER LOTHAR ,  WIGGER AUGUST

IPC: C08J9/00 ,  B29C67/20 ,  C08F2/46 ,  C08F283/01 ,  C08F291/18 ,  C08J9/28 ,  B44D1/50 ,  C08F3/00

CPC classification number: C08J9/283 ,  B29C67/202 ,  C08F2/46 ,  C08F283/01 ,  C08F291/18 ,  C08J2201/0504

Abstract: Poromeric web materials are continuously manufactured by applying to a thin layer of ice crystals a textile fibrous structure and an aqueous solution or dispersion of A. polyethylenically unsaturated monomers having at least two polymerizable double bonds or mixtures of at least 0.1 percent w/w of such polyethylenically unsaturated monomers and monoethylenically unsaturated copolymerizable monomers and optionally high molecular weight polymers, or B. monoethylenically unsaturated monomers and high polymers having molecular weights of more than 10,000, Cooling the whole to such an extent that at least 50 percent of the water Crystallizes, irradiating the solidified structure with electromagnetic radiation having a wavelength of less than 0.70 .mu.m to cause polymerization of the monomers, causing the structure to thaw, removing the material from the support and optionally washing the removed material, separating it from the water and finally drying it.

公开(公告)号：US3652759A

公开(公告)日：1972-03-28

申请号：US3652759D

申请日：1970-01-08

Applicant: BASF AG

Inventor： SCHLEMMER LOTHAR ,  SABATER EUDALDO ,  KRESS GERHARD

IPC: B29C55/14 ,  B29C71/00 ,  B29D7/24

CPC classification number: B29C55/143 ,  B29C71/00 ,  B29K2077/00

Abstract: IMPROVED BIAXIALLY ORIENTED POLYAMIDE FIL, PARTICULARLY SUITABLE FOR PACKAGING APPLICATIONS, MAY BE MADE FROM AMORPHOUS FILM OR SHEETING BY DRAWING THE SAME IN THE MACHINE DIRECTIN AT A DRAW RATIO OF 2.5:1 TO 4:1, DRAWING BEING EFFECTED IN THE FREE PATHS IN THE GAPS BETWEEN NONDRIVEN DRAW ROLLS OF DIAMETER 40 TO 150 MM., SAID FREE PATHS BEING LESS THAN 22 MM. LONG IN ALL CASES AND SAID ROLLS BEING HELD AT SPECIFIC TEMPERATURES DEPENDING ON THEIR PERIPHERAL SPEEDS, AND THEN DRAWING THE SHEETING TRANSVERSELY AT A DRAW RATION OF 3:1 TO 6:1 AND AT A TEMPERATURE OF 165 TO 205*C.