US3056718A - Process of treating hardboard surfaces - Google Patents

Process of treating hardboard surfaces Download PDF

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Publication number
US3056718A
US3056718A US823502A US82350259A US3056718A US 3056718 A US3056718 A US 3056718A US 823502 A US823502 A US 823502A US 82350259 A US82350259 A US 82350259A US 3056718 A US3056718 A US 3056718A
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US
United States
Prior art keywords
hardboard
lap
mat
drying
fiber
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 - Lifetime
Application number
US823502A
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English (en)
Inventor
Robert E Grissom
William A Saums
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.)
Masonite Corp
Original Assignee
Masonite 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 Masonite Corp filed Critical Masonite Corp
Priority to US823502A priority Critical patent/US3056718A/en
Application granted granted Critical
Publication of US3056718A publication Critical patent/US3056718A/en
Priority to BE176236A priority patent/BE853022A/fr
Priority claimed from FR7709550A external-priority patent/FR2385508A1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27M—WORKING OF WOOD NOT PROVIDED FOR IN SUBCLASSES B27B - B27L; MANUFACTURE OF SPECIFIC WOODEN ARTICLES
    • B27M1/00—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching
    • B27M1/02—Working of wood not provided for in subclasses B27B - B27L, e.g. by stretching by compressing
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21J—FIBREBOARD; MANUFACTURE OF ARTICLES FROM CELLULOSIC FIBROUS SUSPENSIONS OR FROM PAPIER-MACHE
    • D21J1/00—Fibreboard
    • D21J1/08—Impregnated or coated fibreboard

Definitions

  • the present invention relates to the production of lignocellulose hardboard sheet articles. More particularly, the invention relates to the production of hardboard having two smooth surfaces characterized by their freedom from unsightly defects and by their improved hardness, paint hold-out, and the like properties.
  • the invention resides in the discovery that wire screen marks may be eliminated from the surfaces of wet formed hardboard sheet articles having two smooth surfaces by the application to the fibrous wet lap of a small amount of a naturally occurring non-conjugated vegetable drying oil. It has been found that where one or both of the lap surfaces are treated in this manner, all of the screen impressions are eliminated from the finally consolidated sheet products. The application of oil must be made prior to drying of the lap in order to obtain these 3,050,718 Patented Oct. 2, 1962 benefits. Unexpectedly, it was also discovered that hardboard sheets treated in this manner are characterized by surfaces which are considerably harder than conventional hardboard sheet surfaces and by improved paint hold-out properties as well as outstanding general improvement in appearance.
  • the numeral 10 represents the headbox of a conventional Fourdrinier-type board forming machine.
  • the forming wire 12 of the machine travels over the suction box 14 and the bottom pressure rolls 16.
  • a top wire screen 22 travels around the top pressure rolls 20 and insures that the formation of the lap 18 is not disturbed during the pressure treatment.
  • the lap is cut into the desired lengths by the saw 24 and, as the individual wet laps proceed along the conveyor 26, a spray of oil is directed on one or both lap surfaces by means of a gang spray represented by the numeral 28.
  • the lap travels into the drier 30 which is normally a series of tiers through which heated air is blown to accomplish drying of the lap. Subsequent to passage through the drier 30, the lap is charged to the hydraulic press 32 where it is consolidated.
  • drying oils which have been found to be usable in the novel method include linseed, soy bean, safilowe-r, and perilla oils. All of these oils are non-conjugated and therefore have slower drying characteristics than oils which are conjugated such as, for example, tung oil. While it is not known with exactness, it is believed that it is this slower drying characteristic which enables oils of this particular class to withstand the drying treatment temperatures without becoming completely polymerized prior to consolidation of the dried laps.
  • the so-treated sheet products are completely free from any wire screen impressions and the products are also improved as regards their physical characteristics.
  • Use of less than about 0.1% of the selected oil does not produce the desired improvements.
  • the treated laps, subsequent to drying, are consolidated into sheets having specific gravities which may range from about 0.8 to 1.2 depending on their ultimate use.
  • the laps may be pressed in a heated hydraulic press at about 1,000 psi. pressure and a temperature of about 240 C. to produce hardboard sheets having a specific gravity of 1.16.
  • the product has a specific gravity of 0.86.
  • the lap is held under very low pressure for about 3 minutes during which time the pressure is released periodically to allow escape of volatiles. Thereafter, the higher pressure is applied for about 0.5-2 minutes to effect the final consolidation of the sheet.
  • specific gravity products within the stated range, may be obtained by varying the pressing conditions.
  • novel process of the invention provides distinct advantages in the manufacture of hardboard sheet articles.
  • the method is simple and does not add materially to the cost of production.
  • it represents an economic advance by virtue of enabling the manufacture of hardboard free from surface defects while, at the same time, the products are characterized by improved physical properties.
  • a process for producing a lignocellulose hardboard sheet article having two smooth surfaces characterized by freedom from screen marks which comprises forming an aqueous slurry of hydrolyzed lignocellulose fiber, felting a fibrous mat from said slurry, partially dewatering the fibrous mat by the application thereto of suction and pressure, applying at least one surface of the mat about 0.l%-1.0% by weight based on the dry weight of fiber of a naturally occurring non-conjugated vegetable drying oil, drying the treated mat to substantial dryness, and thereafter consolidating the dried mat under heat and pressure, said surface treatment with the drying oil substantially eliminating surface defects on the finished product.
  • a process for producing a lignocellulose hardboard article having two smooth surfaces wherein hydrolyzed lignocellulose fiber is felted into a wet lap, dried by treatment with hot air at a temperature of about 300- 750 F., and then consolidated into a dense sheet, the step which comprises applying to at least one Surface of the wet lap about 0.1%1.0% by Weight based on the dry Weight of fiber of a naturally occurring non-conjugated vegetable drying oil, said surface treatment with the drying oil substantially eliminating surface defects on the finished product.
  • a process for producing a lignocellulose hardboard article having two smooth surfaces wherein hydrolyzed lignocellulose fiber is felted into a Wet lap, dried by treatment with hot air at a temperature of about 300- 750 F., and then consolidated into a dense sheet, the step which comprises applying to at least one surface of Cit d the wet lap about 0.1%1.0% by weight based on the dry weight of fiber of linseed oil, said surface treatment with the drying oil substantially eliminating surface defects on the finished product.
  • a lignocellulose hardboard article having two smooth surfaces wherein hydrolyzed lignocellulose fiber is felted into a wet lap, dried by treatment with hot air at a temperature of about 300- 750 F., and then consolidated into a dense sheet, the step which comprises applying to at least one surface of the wet lap about 0.1%1.0% by weight based on the dry weight of fiber of soy bean oil, said surface treatment with the drying oil substantially eliminating surface defects on the finished product.
  • a process for producing a lignocellulose hardboard article having two smooth surfaces wherein hydrolyzed lignocellulose fiber is felted into a wet lap, dried by treatment with hot air at a temperature of about 300- 750 F., and then consolidated into a dense sheet, the step which comprises applying to at least one surface of the wet lap about 0.1%1.0% by weight based on the dry weight of fiber of safilower oil, said surface treatment with the drying oil substantially eliminating surface defects on the finished product.
  • a process for producing a lignocellulose hardboard article having two smooth surfaces wherein hydrolyzed lignocellulose fiber is felted into a wet lap, dried by treatment with hot air at a temperature of about 300- 750 F., and then consolidated into a dense sheet, the step which comprises applying to at least one surface of the wet lap about 0.l%1.0% by weight based on the dry weight of fiber of perilla oil, said surface treatment with the drying oil substantially eliminating surface defects on the finished product.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
US823502A 1959-06-29 1959-06-29 Process of treating hardboard surfaces Expired - Lifetime US3056718A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US823502A US3056718A (en) 1959-06-29 1959-06-29 Process of treating hardboard surfaces
BE176236A BE853022A (fr) 1959-06-29 1977-03-30 Procede pour gaufrer

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US823502A US3056718A (en) 1959-06-29 1959-06-29 Process of treating hardboard surfaces
FR7709550A FR2385508A1 (fr) 1977-03-30 1977-03-30 Procede pour gaufrer, a chaud et sous pression, du bois naturel
BE176236A BE853022A (fr) 1959-06-29 1977-03-30 Procede pour gaufrer
BE853022 1977-03-30

Publications (1)

Publication Number Publication Date
US3056718A true US3056718A (en) 1962-10-02

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ID=27424670

Family Applications (1)

Application Number Title Priority Date Filing Date
US823502A Expired - Lifetime US3056718A (en) 1959-06-29 1959-06-29 Process of treating hardboard surfaces

Country Status (2)

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US (1) US3056718A (fr)
BE (1) BE853022A (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132034A (en) * 1960-12-28 1964-05-05 Standard Oil Co Hardboard saturant compositions
US3151016A (en) * 1962-07-13 1964-09-29 Interchem Corp Method of making pressed fiber board
US3531371A (en) * 1965-05-21 1970-09-29 Karlstad Mekaniska Ab Apparatus for making paper
US3907630A (en) * 1971-01-20 1975-09-23 Defibrator Ab Method of fiber board article production employing predrying of the ligno-cellulosic material prior to liquid suspension and article formation, and employing water recirculation
US4113554A (en) * 1976-02-03 1978-09-12 Rogers Corporation Method of manufacturing insulating board
US4142933A (en) * 1975-12-30 1979-03-06 Newalls Insulation Co. Ltd. Manufacture of insulating products
US4306935A (en) * 1979-07-09 1981-12-22 Newalls Insulation Company Limited Manufacture of insulating products
US4336174A (en) * 1980-05-19 1982-06-22 Reichhold Chemicals, Incorporated Hardboard treating composition and process for forming hardboard surfaces
US4726881A (en) * 1983-02-28 1988-02-23 Masonite Corporation Method of making wet process panels of composite wood material with semi-matching contoured pressure plates
US5622599A (en) * 1994-06-28 1997-04-22 Sproule; Barry Method and apparatus for coating pulp products
US20130270742A1 (en) * 2010-10-29 2013-10-17 Brav-O-Tech Gmbh Moistening system for presses

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2331038B1 (es) * 2007-11-20 2010-09-23 Industrias Losan, S.A. Metodo para grabado de tableros y tablero obtenido por dicho metodo.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2143831A (en) * 1932-01-02 1939-01-10 Insulite Co Synthetic products and process for making them
US2375450A (en) * 1940-02-03 1945-05-08 Wood Conversion Co Manufacture of surface-hardened fiberboard
US2409628A (en) * 1939-09-09 1946-10-22 Wood Conversion Co Manufacture of coated board
US2654296A (en) * 1948-03-18 1953-10-06 James B Mccorkle Process of producing primed hardboard
US2721504A (en) * 1950-07-14 1955-10-25 Statens Skogsind Ab Process for impregnating fibre materials
US2863364A (en) * 1954-01-26 1958-12-09 Statens Skogsind Ab Process for manufacturing form board for casting concrete

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2143831A (en) * 1932-01-02 1939-01-10 Insulite Co Synthetic products and process for making them
US2409628A (en) * 1939-09-09 1946-10-22 Wood Conversion Co Manufacture of coated board
US2375450A (en) * 1940-02-03 1945-05-08 Wood Conversion Co Manufacture of surface-hardened fiberboard
US2654296A (en) * 1948-03-18 1953-10-06 James B Mccorkle Process of producing primed hardboard
US2721504A (en) * 1950-07-14 1955-10-25 Statens Skogsind Ab Process for impregnating fibre materials
US2863364A (en) * 1954-01-26 1958-12-09 Statens Skogsind Ab Process for manufacturing form board for casting concrete

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132034A (en) * 1960-12-28 1964-05-05 Standard Oil Co Hardboard saturant compositions
US3151016A (en) * 1962-07-13 1964-09-29 Interchem Corp Method of making pressed fiber board
US3531371A (en) * 1965-05-21 1970-09-29 Karlstad Mekaniska Ab Apparatus for making paper
US3907630A (en) * 1971-01-20 1975-09-23 Defibrator Ab Method of fiber board article production employing predrying of the ligno-cellulosic material prior to liquid suspension and article formation, and employing water recirculation
US4142933A (en) * 1975-12-30 1979-03-06 Newalls Insulation Co. Ltd. Manufacture of insulating products
US4113554A (en) * 1976-02-03 1978-09-12 Rogers Corporation Method of manufacturing insulating board
US4306935A (en) * 1979-07-09 1981-12-22 Newalls Insulation Company Limited Manufacture of insulating products
US4336174A (en) * 1980-05-19 1982-06-22 Reichhold Chemicals, Incorporated Hardboard treating composition and process for forming hardboard surfaces
US4726881A (en) * 1983-02-28 1988-02-23 Masonite Corporation Method of making wet process panels of composite wood material with semi-matching contoured pressure plates
US5622599A (en) * 1994-06-28 1997-04-22 Sproule; Barry Method and apparatus for coating pulp products
US20130270742A1 (en) * 2010-10-29 2013-10-17 Brav-O-Tech Gmbh Moistening system for presses
US9186811B2 (en) * 2010-10-29 2015-11-17 Brav-O-Tech Gmbh Moistening system for presses

Also Published As

Publication number Publication date
BE853022A (fr) 1977-07-18

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