[go: up one dir, main page]

EP0072801B1 - Produit en papier et procede de preparation - Google Patents

Produit en papier et procede de preparation Download PDF

Info

Publication number
EP0072801B1
EP0072801B1 EP81902942A EP81902942A EP0072801B1 EP 0072801 B1 EP0072801 B1 EP 0072801B1 EP 81902942 A EP81902942 A EP 81902942A EP 81902942 A EP81902942 A EP 81902942A EP 0072801 B1 EP0072801 B1 EP 0072801B1
Authority
EP
European Patent Office
Prior art keywords
base paper
paper
carbon
carbon paper
salt
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
EP81902942A
Other languages
German (de)
English (en)
Other versions
EP0072801A1 (fr
Inventor
Kaj Otto Holger Fuxelius
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.)
BILLINGSFORS PAPPERSBRUK AB
Original Assignee
BILLINGSFORS PAPPERSBRUK AB
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 BILLINGSFORS PAPPERSBRUK AB filed Critical BILLINGSFORS PAPPERSBRUK AB
Publication of EP0072801A1 publication Critical patent/EP0072801A1/fr
Application granted granted Critical
Publication of EP0072801B1 publication Critical patent/EP0072801B1/fr
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/10—Duplicating or marking methods; Sheet materials for use therein by using carbon paper or the like

Definitions

  • the present invention relates to paper products, more particularly carbon paper comprising a base paper based on cellulose and a ink-releasing layer applied thereon, and a process for its manufacture.
  • the base paper must maintain its planarity after manufacture to facilitate handling of the finished carbon paper in connection with automized production.
  • vacuum heads for transporting the product between the different stations, and such transport techniques require inter alia planarity of the base paper and the multi-layered product, i.e. freeness from curl.
  • the conventional technique has not been able in a satisfactory and practical manner to solve the problems associated with the manufacture of carbon paper, which has been indicated by the technical problems illustrated above, and, therefore, the present invention has for its purpose to provide a product and a process for its manufacture, wherein the deficiencies of the conventional technique are eliminated or at any rate substantially reduced while advising a technique which well meets the practical requirements.
  • the invention thus provides for a carbon paper consisting of a base paper based on cellulose and a ink-releasing layer applied thereon.
  • the carbon paper according to the invention is characterized thereby that the base paper contains a hygroscopic substance essentially evenly distributed therein having the function of increasing the moisture content of the base paper at equilibrium.
  • the invention also provides for a process for the manufacture of such carbon paper, and in this manufacture the base paper at some stage before its final drying, for example on a so-called glazing calender, is supplied with a suitable hygroscopic substance, said hydroscopic substance may be supplied already in the pulp or at some later stage after taking up the pulp on the wire or immediately before the transfer of the paper web to the cylinder intended for the final drying. It is particularly suitable to supply on the paper web across its full width, for example by shower or spraying, an aqueous solution of the hygroscopic substance, for example an inorganic salt, the base paper being supplied with a content of evenly distributed material resulting in an increase of the equilibrium moisture content of the paper.
  • a suitable hygroscopic substance may be supplied already in the pulp or at some later stage after taking up the pulp on the wire or immediately before the transfer of the paper web to the cylinder intended for the final drying. It is particularly suitable to supply on the paper web across its full width, for example by shower or spraying, an aque
  • hygroscopic substance a substance which by its presence in the base paper due to its inherent properties results in an increased equilibrium moisture content in the base paper.
  • This hygroscopic substance preferably consists of an inorganic, water-soluble salt, the salts of the alkali and alkaline earth metals being preferred.
  • counterions chloride, sulphate, nitrate and carbonate ions are conceivable,?and particularly preferred salts are the magnesium and calcium salts, particularly calcium or magnesium chloride.
  • the base paper or the starting material therefor is suitably supplied with the hygroscopic substance in the form of an aqueous solution.
  • an aqueous solution of calcium chloride or of magnesium chloride may vary within relatively wide ranges, but a suitable upper limit is about 8 percent by weight based on the dry paper weight. This corresponds to an increase of the equilibrium moisture content of the paper of up to about 15 percent by weight of water.
  • a particularly suitable range in regard to the hygroscopic substance is about 1-7 percent by weight, particularly 3-6 percent by weight.
  • the base paper suitable for manufacturing the carbon paper in accordance with the technique of this invention is preferably a so-called low weight paper, i.e. a paper having a specific area weight of the order of 15-30 g/m 2 .
  • a so-called low weight paper i.e. a paper having a specific area weight of the order of 15-30 g/m 2 .
  • the paper web Before transfer onto the Yankee cylinder for final drying and glazing the paper web is sprayed by means of a lateral ramp with nozzles with an aqueous solution containing about 40-50% of calcium chloride in such a quantity adjusted to the feeding rate of the paper web that the product obtained will contain about 5% of calcium chloride based on the paper dry weight.
  • a so-called carbon mass or paste of conventional type is prepared consisting of carbon black (about 50%), paraffins and waxes (about 25%) and mineral oils (about 25%), said carbon mass being intended to constitute ink-releasing layer in the carbon paper made.
  • the prepared carbon mass heated to about 100°C for suitable consistency is supplied to the non-glazed face of the base paper prepared according to the above by means of a coating roller to the desired quantity, suitably about 4-7 g/m 2 , and the coated paper web is transferred to cooling by being passed over a cylinder cooled with cold water, the glazed face of the base paper facing the cooling cylinder. After cooling the carbon paper obtained is ready for the intended use. In view of the increased equilibrium moisture content of the paper the product obtains very good properties, which is further explained below.
  • Example 1 The procedure of Example 1 is repeated but in this instance while preparing a base paper containing about 7% calcium chloride. This increased calcium chloride content results in an increase of the equilibrium moisture content to about 14-15%.
  • the carbon paper obtained has properties similar to that prepared in Example 1.
  • Example 1 The procedure in Example 1 is repeated but for making a base paper containing about 3.5% calcium chloride. This modification of the base paper results in an increase of the equilibrium moisture content to about 9-10%.
  • Example 1 The procedure of Example 1 is repeated but in this instance while using an aqueous solution of magnesium chloride.
  • the magnesium chloride is added to the base paper to a content of about 7%, which results in an equilibrium moisture content. of the base paper of about 10-11 %. From this it can be deducted that the magnesium chloride has a somewhat lower effect than calcium chloride at a corresponding quantity in regard to the increase in equilibrium moisture content.
  • the base paper obtained has properties comparative to those of that obtained in Example 1.
  • Example 1 is repeated but using an aqueous solution of magnesium sulphate in a corresponding quantity on a molar basis.
  • a base paper is obtained having essentially same good properties as those of the base paper obtained in Example 1.
  • the improvement in the properties of the carbon paper provided by using the technique of this invention seems in principal to be a result of the increase in equilibrium moisture content caused by the supply of hygroscopic substance.
  • the equilibrium moisture content for the types of base papers relevant in the context is about 6%, this at a relative humidity of about 50%.
  • the advantages resulting from the technique of the instant invention the following may be mentioned.

Landscapes

  • Paper (AREA)
  • Laminated Bodies (AREA)

Claims (10)

1. Papier carbone comprenant un substrat en papier à base de cellulose et une couche libérant de l'encre, qui lui est appliquée, caractérisé en ce que le substrat en papier renferme une substance hygroscopique qui y est distribuée essentiellement de façon uniforme et qui a pour fonction d'accroître la teneur en humidité à l'équilibre dans le substrat en papier.
2. Papier carbone selon la revendication 1, caractérisé en ce que la substance hygroscopique est constituèe d'un sel inorganique soluble dans l'eau.
3. Papier carbone selon la revendication 2, caractérisé en ce que ledit sel est choisi parmi les sels de métaux alcalins et alcalino-terreux.
4. Papier carbone selon la revendication 3, caractérisé en ce que le sel en tant qu'anion renferme des ions chlorure, sulfate, nitrate ou carbonate.
5. Papier carbone selon la revendication 1, caractérisé en ce que le sel est du chlorure de calcium ou du chlorure de magnésium.
6. Papier carbone selon l'une quelconque des revendications précédentes, caractérisé en ce que ladite substance est présente dans le substrat en papier en une quantité s'élevant jusqu'à environ 10% en poids sur la base du poids sec du substrat en papier.
7. Papier carbone selon la revendication 6 lorsqu'elle se rattache à l'une quelconque des revendications 2 à 5, caractérisé en ce que ladite quantité est d'environ 1 à 8% en poids, particulièrement environ 3 à 6% en poids.
8. Papier carbone selon l'une quelconque des revendications précédentes, caractérisé en ce que la couche libérant l'encre est constituée d'une masse de carbone hydrophobe, par exemple renfermant du noit de carbone dans une matrice de paraffine, de cire et d'huile minérale.
9. Un procédé pour la préparation d'un papier carbone comprenant un substrat en papier à base de cellulose et une couche libérant de l'encre, qui lui est appliquée, caractérisé en ce que le substrat à base de papier, avant son séchage final, est traité avec une solution aqueuse d'une substance hygroscopique ayant pour fonction d'accroître la teneur d'humidité à l'équilibre du substrat en papier.
10. Un procédé selon la revendication 9, caractérisé en ce que la feuille de substrat en papier est, sur toute sa largeur, pulvérisée avec une solution aqueuse d'un sel inorganique, de préférence du chlorure de calcium ou de magnésium.
EP81902942A 1980-11-04 1981-10-16 Produit en papier et procede de preparation Expired EP0072801B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8007737A SE8007737L (sv) 1980-11-04 1980-11-04 Pappersprodukt och forfarande for dess framstellning
SE8007737 1980-11-04

Publications (2)

Publication Number Publication Date
EP0072801A1 EP0072801A1 (fr) 1983-03-02
EP0072801B1 true EP0072801B1 (fr) 1985-07-03

Family

ID=20342161

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81902942A Expired EP0072801B1 (fr) 1980-11-04 1981-10-16 Produit en papier et procede de preparation

Country Status (5)

Country Link
EP (1) EP0072801B1 (fr)
BR (1) BR8108997A (fr)
NO (1) NO822321L (fr)
SE (1) SE8007737L (fr)
WO (1) WO1982001516A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001025856A1 (fr) 1999-10-01 2001-04-12 Foto-Wear, Inc. Materiau de transfert d'image comportant une couche de reception d'image et procede de transfert thermique mettant en application ce materiau
US7122235B2 (en) * 2001-06-11 2006-10-17 Eastman Kodak Company Tack free cauterized edge for pressure sensitive adhesive web
US20030031838A1 (en) * 2001-06-11 2003-02-13 Eastman Kodak Company Tack free edge for pressure sensitive adhesive web

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2533957A1 (de) * 1975-07-30 1977-02-03 Schoeller F H Gmbh Flaechenfoermiges zeichnungstraegermaterial

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2535957A1 (de) * 1975-08-12 1977-03-10 Aidlin Joseph W Metallhalogenid-fluorkohlenwasserstoff-stoffzusammensetzung und ihre verwendung

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2533957A1 (de) * 1975-07-30 1977-02-03 Schoeller F H Gmbh Flaechenfoermiges zeichnungstraegermaterial

Also Published As

Publication number Publication date
BR8108997A (pt) 1983-03-01
NO822321L (no) 1982-07-02
WO1982001516A1 (fr) 1982-05-13
EP0072801A1 (fr) 1983-03-02
SE8007737L (sv) 1982-05-05

Similar Documents

Publication Publication Date Title
KR860000701B1 (ko) 무기질함량이 높은 종이 및 그 제조방법
US2949382A (en) Method of making printable coated paper
CA1296608C (fr) Carton pour panneau de gypse
CA1037713A (fr) Papier enduit
US3438808A (en) Polyvinyl alcohol-boric acid-containing composition,treatment of paper web therewith and the treated paper web
US2772184A (en) Paper coating
CN104846684B (zh) 一种环保型吸塑双面涂布白板纸及其制备工艺
ATE22712T1 (de) Metallisiertes papier und verfahren zur herstellung.
US4110155A (en) Method of manufacturing synthetic resin coated papers
US5500191A (en) Paper coating composition
US6966972B2 (en) Coating composition, paper product having flexible coating and method for manufacturing a paper product
EP0072801B1 (fr) Produit en papier et procede de preparation
US2060824A (en) Paper manufacture
US1913329A (en) Filled surface paper and process of making same
US3017295A (en) Coated paper and paperboard and process for making same
MXPA01001596A (es) Tablero de pared con mejora resistencia a enrollamiento.
US3413190A (en) Process for manufacturing paperboard with high grease resistance by applying a plurality of starch coatings to a wet board
US3044896A (en) Method of making cast coated paper
US2934467A (en) Dry gloss pre-cast clay laminated paper and method of making it
US3215589A (en) Two ply printing paper and method of producing the same
JPH06101190A (ja) 紙カップ用原紙の製造方法
JPS58214595A (ja) ピンホ−ルの少ない紙支持体
Mentzer Starch in the paper industry
US1957370A (en) Paper manufacture
US4131710A (en) Recording material containing asbestos

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19821125

AK Designated contracting states

Designated state(s): CH DE FR LI NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: BILLINGSFORS PAPPERSBRUK AB

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): CH DE FR LI NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19850703

Ref country code: LI

Effective date: 19850703

Ref country code: FR

Free format text: THE PATENT HAS BEEN ANNULLED BY A DECISION OF A NATIONAL AUTHORITY

Effective date: 19850703

Ref country code: CH

Effective date: 19850703

REF Corresponds to:

Ref document number: 3171245

Country of ref document: DE

Date of ref document: 19850808

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
EN Fr: translation not filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19861017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19900403

EUG Se: european patent has lapsed

Ref document number: 81902942.2

Effective date: 19870812