Classifications

• • D—TEXTILES; PAPER
  • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
  • D06M—TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
  • D06M13/00—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment
  • D06M13/10—Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with non-macromolecular organic compounds; Such treatment combined with mechanical treatment with compounds containing oxygen
  • D06M13/12—Aldehydes; Ketones
  • D06M13/127—Mono-aldehydes, e.g. formaldehyde; Monoketones

Definitions

• the present invention relates to a new process of improving regenerated cellulose.
• a regenerated (dissolved and precipitated) cellulose can be improved in an excellent manner by treating it with formaldehyde solutions in the presence of sulphocarboxylic (sulphonic carboxylic) acids and subjecting it to a drying process.
• formaldehyde solutions may advantageously be dilute, as for example from 2.5 to 5 per cent. It is preferable to carry out the subsequent drying at elevated temperature, as for example at from 80 to 100 C.
• the regenerated cellulose as for example artificial silk or cell-wool, is improved in various respects.
• Example 1 A cable of cell-wool is led, before the final drying, through a 2.5 per cent formaldehyde solution containing 0.5 per cent of sulpho-salicylic acid and 0.2 per cent of the product obtainable by the reaction of 1 molecular proportion of triethanolamine monostearic acid ester with 2 mo lecular proportions of ethylene oxide (as a cableopening agent). After cutting the fibres and drying at 100 C. there is obtained a staple fibre which by reason of its elasticity and small absorptive power for water is extraordinarily well suited for working up together with Wool; mixed yarns or mixed fabrics of wool and the staple fibre treated in the said manner scarcely differ from pure wool.
• Example 2 An artificial silk fabric is treated for one quarter of an hour at ordinary temperature in a washing machine or in a jigger with a 2.5 per cent solution of formaldehyde which contains 0.3 per cent of ortho-sulpho-benzoic acid. After squeezing, the strip of fabric is led over a drying cylinder heated to 100 C. or through a drying chamber heated to the same temperature, whereby the drying requires from half to one hour depending on the thickness of the material.
• a material is obtained which, without showing external change, has excellent resistance to creasing, shows no Water spots when wetted, does not shrink and, because it is not capable of swelling, has an excellent resistance to moisture.
• Improved regenerated cellulose being free from undesirable swelling properties and possessing good tensile strength in the moist state, comprising a product resulting from the reaction of regenerated cellulose with a formaldehyde solution in the presence of an aromatic sulphocarboxylic acid, and subjecting the resulting product to a drying process.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
• Chemical Or Physical Treatment Of Fibers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=25964841

Family Applications (1)

Country Status (4)

Families Citing this family (3)

Family Cites Families (2)

• 1937
  • 1937-11-13 DE DEB6017D patent/DE936325C/de not_active Expired
  • 1937-11-17 GB GB31632/37A patent/GB505045A/en not_active Expired
• 1938
  • 1938-09-29 US US232287A patent/US2167914A/en not_active Expired - Lifetime
  • 1938-10-31 FR FR845487D patent/FR845487A/fr not_active Expired

Also Published As

Similar Documents