Classifications

• • D—TEXTILES; PAPER
  • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
  • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
  • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
  • D21H17/03—Non-macromolecular organic compounds
  • D21H17/05—Non-macromolecular organic compounds containing elements other than carbon and hydrogen only
  • D21H17/14—Carboxylic acids; Derivatives thereof
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
  • A47L9/32—Handles
  • A47L9/327—Handles for suction cleaners with hose between nozzle and casing

Definitions

• the process can be of the substances mentioned-into the pulp, which applied at any stage of the manufacture or materially and in different ways impairs the finishing process of paper, at which the fibre original properties of the paper.
• the paper turns i in a dry condition.
• dry boards 0 hard and brittle and can be used only to a limited of cellulose, which may or may. not be ground extent as a packing material, which should be r t purpose r fi di n rify n hlits chief use. tion, the excess of the esterifying agent is washed
• the object of this invention is a new process, away, the wash liquor is removed, whereupon the which serves to make paper and the like immaterial is worked in the usual manner. 35
• the finished renning band of remaining physical and technicalqualities The paper, millboard and the e, ufl ei y dried, process was developed from the fact found by is treated as disclosed heretofore; or paper and me, that a trifling amount of a water repellent the like, which has been subjected to the action- 40 radical is suflicient to obtain the desired eifect,. of sulphuric. acid, or of zinc chloride, or to 40 provided that it be embodied into the paper mass coloring, or to any other similar finishing procby treating with esterifying derivatives of higher ess, is treated in the same way.
• the paper is treated, neither with a free be worked into emulsions, in h methods acid, like stearic or abietic acid, nor with an familiar from the manufacture of fatty mulester, similar to those contained in wax, as has sions.
• the invention can 5 been done previously, but it is treated with an be applied at a y st e of t e pap a d m esterifier, such as a chlorid, or an anhydride board manufacturing process, because, in that of one or more of the higher fatty acids. Very case, it is not required that the fiber be dry.
• paper and An advantageous W y Of yin ut Jihi inthe like when treated with reagents of the said vention consists of first treating the fibrous mass 5;
• a suitable derivative of an acid for instance with the anhydride of a higher fatty acid
• drying and finally exposing the dry product to a temperature exceeding 35 C., preferably to a temperature between and 110 C.
• the time required to secure a satisfactory effect is different for different materials. While for a cellulose product two to three hours are sufficient, other matter, for instance such containing wood pulp, is preferably treated, to obtain the maximum effect, for six or more hours at the said temperature.
• water repellent cable paper is made by soaking ordinary cable paper in a one wood pulp together with a three percent emulsion of stearic anhydride in ammonia water, to which a little starch paste has been added, using the emulsions in the proportion of one part, by weight, of stearic anhydride to one hundred parts of ground wood.
• the mass is worked into millboard on a boarding machine and the dry millboard is treated at about C. during six hours.
• a product is obtained, which does not absorb water and which is excellently suited as a packing and as a building material.
• palmitic or stearic anhydrides instead of palmitic or stearic anhydrides one can use for instance lauric, palmitic, oleic, montanic anhydrides or the like, or mixtures of different anhydrides.
• a very important application of this inven-' tion consists of manufacturing paper and millboard, which are water repellent and fireproof at the same time.
• Fireproof paper and the like has of course, been made before, by soaking the material with strong solutions of different salts, for instance of ammonium chloride.
• Such products are, however, a great deal more liable to absorb water, than even ordinary paper and millboard are. In many cases, especially for building purposes, they can hardly be used.
• paper and millboard made water repelling by known methods cannot be made, by a combined process, fireproof at the same time. They either do not absorb the salt solutions, or, if the solution is forced into them by heat, the water repelling effect is destroyed.
• the products made waterproof according to the method here disclosed have the peculiarity, though they repel cold water, to admit warm water to a degree which rises with temperature. After drying, they repulse coldwater again as before.
• paper, millboard and the like can be made waterproof and fireproof at the same time. This is done by first making the product waterproof in any manner as explained heretofore, then steeping it, at an elevated temperature, preferably above 40 0., into a salt solution of the same kind as usually employed for the purpose.
• waterproof wallboard is made by adding, to wood pulp suspended in a board mill cylinder, a three percent aqueous suspension of stearyl anhydride, using one part by weight of the anhydride to one hundred parts of dry paper pulp.
• the board obtained is dried, for six hours, at a temperature of 90 C., and is finally soaked in a solution, which contains grams of ammonium chloride and 50 grams of sodium tungstate in 1000 cc. ter having been dried, the millboard thus made is water repellent and fire retarding at the same time.
• paper material includes only paper pulp and finished paper.
• a process for waterproofing paper which comprises treating the said paper with an esterifying derivative of a higher fatty acid, and drying the product at a temperature above 35 C.
• a process for waterand fireproofing paper which comprises treating the said paper with an esterifying derivative of a higher fatty acid, then steeping the said paper in a solution containing a fire-retarding salt.
• awaterproof paper material being the product obtained by treating the said paper material with an esterifying derivative of a higher fatty acid, and drying the product at a temperature above 35 C.
• a fireand waterproof paper material being the product obtained by treating the said paper material with an esterifying derivative of a higher fatty acid, then steeping in a solution containing a fire- -retarding salt and drying the product at a temperature above 35 C.
• a process for waterproofing paper pulp which comprises treating the said pulp with an esterifying derivative of a higher fatty acid, and subjecting the material after drying to a temperature of more than 35 C. for at least one hour.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Paper (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=6290242

Family Applications (1)

Country Status (6)

Cited By (10)

Families Citing this family (1)

• 1929
  • 1929-06-08 DE DEN30462D patent/DE528772C/de not_active Expired
• 1930
  • 1930-05-31 US US458909A patent/US1996707A/en not_active Expired - Lifetime
  • 1930-06-06 NL NL52019A patent/NL31963C/nl active
  • 1930-06-06 GB GB17662/30A patent/GB356277A/en not_active Expired
  • 1930-06-06 BE BE370885A patent/BE370885A/fr unknown
  • 1930-06-07 FR FR697149D patent/FR697149A/fr not_active Expired
• 1940
  • 1940-04-10 NL NL97598A patent/NL52019C/nl active

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