Classifications

• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
  • C08J5/12—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives
  • C08J5/122—Bonding of a preformed macromolecular material to the same or other solid material such as metal, glass, leather, e.g. using adhesives using low molecular chemically inert solvents, swelling or softening agents
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
  • C08J7/12—Chemical modification
  • C08J7/14—Chemical modification with acids, their salts or anhydrides
• • 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
  • D06M13/184—Carboxylic acids; Anhydrides, halides or salts thereof
  • D06M13/188—Monocarboxylic acids; Anhydrides, halides or salts thereof
• • 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
  • D06M15/00—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment
  • D06M15/19—Treating fibres, threads, yarns, fabrics, or fibrous goods made from such materials, with macromolecular compounds; Such treatment combined with mechanical treatment with synthetic macromolecular compounds
  • D06M15/37—Macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds
  • D06M15/59—Polyamides; Polyimides
• • C—CHEMISTRY; METALLURGY
  • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
  • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
  • C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers

Definitions

• the invention relates to processes for the treatment of polyamide and superpolyamide products, and specifically of fabrics, knitted goods, plaited works, cords, cordages, and injection molded goods, preferably in the form of summer shoes, sandals, sandalettes, pantolets, slippers, and watch-bands.
• the invention also relates to associated products.
• the invention is based on the finding that it is sometimes necessary to fix the length and width of plaited goods and strips of the above-mentioned kind, and especially those which are provided with a multitude of small holes formed during manufacture, so that they undergo no subsequent change in these two directions.
• the invention is further based on the fact that it is often desirable to impart to products of the above-mentioned kind a smooth surface which can be changed from half-lustre to high-lustre.
• liquid formic acid which preferably contains dissolved polyamide or superpolyamide.
• a solution of polyamide or superpolyamide in formic acid is preferably sprayed onto the surface portions to be treated, whereupon the formic acid is allowed to evaporate, so that the polyamide or superpolyamide which had been dissolved in the formic acid remains on the products.
• Said polyamide or superpolyamide forms on the product a coating organically adhering thereto.
• the evaporation of the formic acid can be accelerated by subjecting the product to a heat treatment, preferably immediately after the solution has been sprayed on.
• the amount of polyamide or superpolyamide required for the spraying-on process is comparatively small. Consequently, the spraying process can be repeated as often as possible after the preceding spraying has dried.
• One or possibly two sprayings on only one side of an article for example, a braided band, preferably on the side lo cated at the bottom during use, i.e., on the side engaging the skin are sufficient for most purposes for which the product is to be used.
• the braided works are to come into contact with Water on all sides, it is advisable to spray the solution on two sides, i.e., on the lower side and on the upper side.
• plaited works according to the invention namely, that they have a dirt-repellent surface, i.e., that dirt practically does not adhere to them, is of special importance for many purposes for which these plaited works are used.
• Owing to the structure of the plaited work previously known plaited bands or strips were rough and became dirty merely due to body perspiration. Surprisingly, this effect no longer occurs in bands or strips sprayed according to the invention.
• the surface of the band resting on the skin absorbs practically no perspiration; yet the skin is fully able to breathe because the holes in the plaited work are not clogged by the treatment of the invention.
• the plaited works according to the invention can be cleaned and freed from dust or the like in an extremely simple manner such as, for example, by being cleaned simply with water.
• the formic acid is applied to various products by evaporation. It was found that hot formic acid vapor is particularly suitable, and especially vapor which is obtained by the boiling of formic acid.
• the desired lustrous surface is formed directly by the surface biting of the vapor treated product, which is caused by the formic acid vapor.
• the lustre of the surface of the finished product will differ. Accordingly, the amount of vapor supplied and the treatment time can be varied as desired. Owing to the hot formic acid vapor, the polyamide molecules located at the surface of the product immediately melt over the entire surface which is exposed to the action of the formic acid vapor.
• the method also imparts the property of making the surface highly dirt-repellent.
• this development of the process according to the invention firmly interconnects individual threads, bands and the like, which gives the appearance as if said threads, bands and the like, had been glued together.
• the bonding or connecting of the threads, bands and the like in fact, takes place by the interengagement (running or flowing into each other) of the surface molecules dissolved at the points of contact of said threads, bands and the like.
• Another substantial advantage of the process according to the invention consists in that the products treated according to the invention can be cut or punched, without the cut or punched fabric, knitted goods or plaited work becoming frayed. This results in a saving of material.
• the evaporating process according to the invention also imparts to the products treated an extraordinarily fresh and clear appearance. Moreover, products which are vapor-treated in accordance with the invention remain soft and flexible.
• the vapor-treating process according to the invention causes the loss of only a small amount of formic acid, namely of that amount which remains bound after the melting of the molecules when the drying has been completed.
• a process comprising uniting the strands of a plaited polyamide or superpolyamide article by contacting said article with hot formic acid vapors to soften said strands and thereby cause the strands to be united where they contact one another.

Landscapes

• Chemical & Material Sciences (AREA)
• Engineering & Computer Science (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Organic Chemistry (AREA)
• Textile Engineering (AREA)
• Health & Medical Sciences (AREA)
• Medicinal Chemistry (AREA)
• Polymers & Plastics (AREA)
• Materials Engineering (AREA)
• General Chemical & Material Sciences (AREA)
• Manufacturing & Machinery (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
• Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=7071761

Family Applications (1)

Country Status (4)

Cited By (3)

Citations (9)

• 0
  • NL NL302870D patent/NL302870A/xx unknown
• 1964
  • 1964-01-20 AT AT40564A patent/AT247606B/de active
  • 1964-01-21 GB GB2573/64A patent/GB1008628A/en not_active Expired
  • 1964-03-26 US US355060A patent/US3393111A/en not_active Expired - Lifetime

Patent Citations (9)

Also Published As

Similar Documents