GB1020372A - Flexible cellulosic filamentary materials having ultra-violet light shielding properties - Google Patents

Flexible cellulosic filamentary materials having ultra-violet light shielding properties

Info

Publication number
GB1020372A
GB1020372A GB4047663A GB4047663A GB1020372A GB 1020372 A GB1020372 A GB 1020372A GB 4047663 A GB4047663 A GB 4047663A GB 4047663 A GB4047663 A GB 4047663A GB 1020372 A GB1020372 A GB 1020372A
Authority
GB
United Kingdom
Prior art keywords
film
hydroxide
ferric
salt
aqueous solution
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4047663A
Inventor
Wilbur Thomas Brader
Thomas Edward Bradley
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
FMC Corp
Original Assignee
FMC Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FMC Corp filed Critical FMC Corp
Priority to GB4047663A priority Critical patent/GB1020372A/en
Publication of GB1020372A publication Critical patent/GB1020372A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06MTREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS, FABRICS, FEATHERS OR FIBROUS GOODS MADE FROM SUCH MATERIALS
    • D06M11/00Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising
    • D06M11/32Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/36Treating fibres, threads, yarns, fabrics or fibrous goods made from such materials, with inorganic substances or complexes thereof; Such treatment combined with mechanical treatment, e.g. mercerising with oxygen, ozone, ozonides, oxides, hydroxides or percompounds; Salts derived from anions with an amphoteric element-oxygen bond with oxides, hydroxides or mixed oxides; with salts derived from anions with an amphoteric element-oxygen bond
    • D06M11/49Oxides or hydroxides of elements of Groups 8, 9,10 or 18 of the Periodic Table; Ferrates; Cobaltates; Nickelates; Ruthenates; Osmates; Rhodates; Iridates; Palladates; Platinates

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Wrappers (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • General Preparation And Processing Of Foods (AREA)

Abstract

A fibrous cellulosic base sheet (e.g. of paper or cotton) is impregnated with a cellulosic hydrophilic film-forming material, e.g. regenerated cellulose, carboxy methyl cellulose and other cellulose ethers, and hydrophilic cellulose esters, and treated with an aqueous solution of an inorganic water-soluble ferric salt and then immersed in an aqueous solution maintained at a pH of at least 5, preferably at least 10, to precipitate ferric hydroxide in situ. The ferric salt is preferably ferric chloride, suitably 0.01-0.2% by weight of the anhydrous salt, and the second aqueous solution may contain an alkali or alkaline earth metal basic salt or hydroxide, preferably 2% sodium hydroxide. Sodium acetate, sodium carbonate, ammonium carbonate, potassium hydroxide and calcium hydroxide are also specified. Immersion times may be 1-60 secs. in the ferric salt bath at room temperature, and 5-30 secs. in the alkaline bath at from room temperature to 40 DEG C. After removal from the alkaline bath and washing, the sheet may be plasticized in an aqueous bath containing e.g. glycerol, and also an anchoring agent, e.g. melamine-formaldehyde precondensates, urea-formaldehyde precondensates, polyalkylene-imines and epoxy resins, if it is desired subsequently to apply a polymeric film-forming coating. Water-insoluble anchoring agents may be applied to the sheet after drying. Materials so treated show a substantially reduced transmission of ultra-violet light and are useful in packing foodstuffs (see Division A2). For details of coatings which may be applied see Division B2.ALSO:A coated sheet material comprises a flexible, hydrophilic cellulosic filamentary material, for example a non-fibrous regenerated cellulose film, a carboxymethyl cellulose film, or a fibrous cellulosic base sheet (e.g. paper or cotton) impregnated with a hydrophilic cellulosic film-forming material, uniformly impregnated with ferric hydroxide or hydrated ferric oxide at least adjacent one surface thereof, and having a film-forming polymer coating on the surface thereof, for instance a copolymer of at least 50% of vinylidene chloride and at least one other monomer copolymerizable therewith. Filamentary materials in general include fibrous and non-fibrous sheets, films, pellicles, and ribbons of regenerated cellulose, cellulose ethers, hydrophilic cellulose esters, cotton and paper. Specified coating materials include also vinyl chloride-vinyl acetate copolymers, nitrocellulose and polyalkylenes such as polyethylene and polypropylene. Coatings may be applied by melt-extrusion or from solutions, including lacquers and latices, to the coloured cellulosic base sheet. In a preferred method, regenerated cellulose film, in the wet-gel state, is treated with an aqueous solution of an inorganic water-soluble ferric salt and then immersed in an aqueous solution maintained at a pH of at least 5, preferably at least 10, to precipitate ferric hydroxide in situ. The ferric salt is preferably ferric chloride, suitably 0,01-0,2% by weight of the anhydrous salt and the second aqueous solution may contain an alkali or alkaline earth metal basic salt or hydroxide, preferably 2% sodium hydroxide. Sodium acetate, sodium carbonate, ammonium carbonate, potassium hydroxide and calcium hydroxide are also specified. Immersion times may be 1-60 seconds in the ferric salt bath at room temperature, and 5-30 seconds in the alkaline bath at from room temperature to 40 DEG C. After removal from the alkaline bath and washing, the film may be plasticized in an aqueous bath containing e.g. glycerol, and also an anchoring agent, e.g. melamine-formaldehyde precondensates, urea-formaldehyde precondensates, polyalkylene-imines and epoxy resins, if it is desired subsequently to apply a polymeric film-forming coating. Water-insoluble anchoring agents may be applied to the film after drying. The film is then coated. In an example, an impregnated, anchor-coated regenerated cellulose film is coated with "Saran" (Registered Trade Mark) dissolved in a mixture of tetrahydrofuran and toluene, and containing also small proportions of clay, wax and alkyd resin to improve surface characteristics. Coated films so made show a substantially reduced transmission of ultra-violet light and are useful in packing foodstuffs (see Division A2).
GB4047663A 1963-10-14 1963-10-14 Flexible cellulosic filamentary materials having ultra-violet light shielding properties Expired GB1020372A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4047663A GB1020372A (en) 1963-10-14 1963-10-14 Flexible cellulosic filamentary materials having ultra-violet light shielding properties

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4047663A GB1020372A (en) 1963-10-14 1963-10-14 Flexible cellulosic filamentary materials having ultra-violet light shielding properties

Publications (1)

Publication Number Publication Date
GB1020372A true GB1020372A (en) 1966-02-16

Family

ID=10415089

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4047663A Expired GB1020372A (en) 1963-10-14 1963-10-14 Flexible cellulosic filamentary materials having ultra-violet light shielding properties

Country Status (1)

Country Link
GB (1) GB1020372A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108927101A (en) * 2018-07-06 2018-12-04 济南大学 A kind of acicular nanometer FeOOH adsorbent and preparation method thereof
CN110592702A (en) * 2019-09-26 2019-12-20 东华大学 Photoresponse and anti-freezing elastic gel fiber and preparation method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108927101A (en) * 2018-07-06 2018-12-04 济南大学 A kind of acicular nanometer FeOOH adsorbent and preparation method thereof
CN110592702A (en) * 2019-09-26 2019-12-20 东华大学 Photoresponse and anti-freezing elastic gel fiber and preparation method thereof

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