GB2026571A - Paper for packing purposes, and a process for its manufacture - Google Patents
Paper for packing purposes, and a process for its manufacture Download PDFInfo
- Publication number
- GB2026571A GB2026571A GB7923900A GB7923900A GB2026571A GB 2026571 A GB2026571 A GB 2026571A GB 7923900 A GB7923900 A GB 7923900A GB 7923900 A GB7923900 A GB 7923900A GB 2026571 A GB2026571 A GB 2026571A
- Authority
- GB
- United Kingdom
- Prior art keywords
- paper
- sizing
- starch
- web
- proteins
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims description 19
- 238000012856 packing Methods 0.000 title abstract description 7
- 229920002472 Starch Polymers 0.000 claims abstract description 36
- 235000019698 starch Nutrition 0.000 claims abstract description 35
- 239000000463 material Substances 0.000 claims abstract description 34
- 238000004513 sizing Methods 0.000 claims abstract description 32
- 239000008107 starch Substances 0.000 claims abstract description 32
- 239000010893 paper waste Substances 0.000 claims abstract description 29
- 235000013339 cereals Nutrition 0.000 claims abstract description 23
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 19
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 19
- 239000000470 constituent Substances 0.000 claims abstract description 12
- 241000209140 Triticum Species 0.000 claims abstract description 11
- 235000021307 Triticum Nutrition 0.000 claims abstract description 11
- 239000002657 fibrous material Substances 0.000 claims abstract description 8
- 239000004160 Ammonium persulphate Substances 0.000 claims abstract description 7
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 235000019395 ammonium persulphate Nutrition 0.000 claims abstract description 7
- 239000006185 dispersion Substances 0.000 claims abstract description 7
- 239000007800 oxidant agent Substances 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 239000002994 raw material Substances 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 7
- 229920001131 Pulp (paper) Polymers 0.000 claims description 6
- 238000004537 pulping Methods 0.000 claims description 5
- 238000010298 pulverizing process Methods 0.000 claims description 5
- 244000205754 Colocasia esculenta Species 0.000 claims description 4
- 235000006481 Colocasia esculenta Nutrition 0.000 claims description 4
- 230000009172 bursting Effects 0.000 claims description 4
- 239000011248 coating agent Substances 0.000 claims description 4
- 238000000576 coating method Methods 0.000 claims description 4
- 240000003183 Manihot esculenta Species 0.000 claims description 2
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 claims description 2
- 239000000123 paper Substances 0.000 abstract description 51
- -1 e.g. Substances 0.000 abstract 1
- 239000000654 additive Substances 0.000 description 5
- 229920002678 cellulose Polymers 0.000 description 5
- 239000001913 cellulose Substances 0.000 description 5
- 239000010903 husk Substances 0.000 description 4
- 238000007873 sieving Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 229920002261 Corn starch Polymers 0.000 description 2
- 235000019759 Maize starch Nutrition 0.000 description 2
- 241000209056 Secale Species 0.000 description 1
- 235000007238 Secale cereale Nutrition 0.000 description 1
- 244000061456 Solanum tuberosum Species 0.000 description 1
- 235000002595 Solanum tuberosum Nutrition 0.000 description 1
- 244000062793 Sorghum vulgare Species 0.000 description 1
- 244000098338 Triticum aestivum Species 0.000 description 1
- 240000000359 Triticum dicoccon Species 0.000 description 1
- 240000008042 Zea mays Species 0.000 description 1
- 235000005824 Zea mays ssp. parviglumis Nutrition 0.000 description 1
- 235000002017 Zea mays subsp mays Nutrition 0.000 description 1
- 230000002730 additional effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 239000004464 cereal grain Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 235000005822 corn Nutrition 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002655 kraft paper Substances 0.000 description 1
- 235000019713 millet Nutrition 0.000 description 1
- 229920001592 potato starch Polymers 0.000 description 1
- 235000012015 potatoes Nutrition 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000010902 straw Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
- 229940100445 wheat starch Drugs 0.000 description 1
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
- D21H17/20—Macromolecular organic compounds
- D21H17/21—Macromolecular organic compounds of natural origin; Derivatives thereof
- D21H17/24—Polysaccharides
- D21H17/28—Starch
-
- 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
- D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
- D21H11/14—Secondary fibres
Landscapes
- Paper (AREA)
Abstract
A paper for packing purposes, particularly for use in the manufacture of corrugated cardboard, is made from waste paper and afforded good strength and finish by a surface sizing with gelatinized starch from cereals and/or tubers and/or roots together with proteins contained in these materials after dispersion or solution. The sizing may consist of gelatinized starch and cereal proteins of a normal commercial wheat and, if required, a small addition of an oxidizing agent, e.g., ammonium persulphate. Fibrous material separated from the gelatinized starch may be added to the waste paper constituent.
Description
SPECIFICATION
Paper for packing purposes, and a process for its manufacture
This invention relates to a paper for packing purposes, particularly for use in the manufacture of corrugated cardboard, which is manufactured with surface sizing using a predominant proportion of sorted and/or unsorted waste paper and also paper additives as required. By paper additives are to be understood fillers, colouring materials, wetting and antistatic agents, moisture-repelling agents, etc.
In paper making the use of waste paper is known, particularly when manufacturing lower-quality grades, frequently the waste paper is subjected to sorting before use, to remove impurities and foreign bodies. Subsequently the waste paper is converted into a watery suspension in so-called pulping machines; it is beaten and, with addition of paper additives if required, is blended as a paper pulp. The paper pulp is then formed into a continuous paper web on a paper-making machine and is dried after preliminary de-watering. De-watering normally takes place on an endless sieve on which a mat is formed from the diluted paper pulp applied to it. This mat is then further de-watered by suction and/or pressing. Finally a large part of the remaining water is evaporated by supplying heat during a final drying process.
When paper for packing purposes, particularly for further processing into corrugated cardboard, is manufactured exclusively or predominantly from waste paper, the mechanical properties required of the paper are not readily achieved. These properties are primarily characterized by the concepts of surface crushing pressure and corner crushing resistance or ring crushing pressure. Surface crushing pressure is described in DIN 53 143/44, corner crushing resistance in DIN 53 149 and ring crushing pressure in the description of American testing method
ASTM 1164. The mechanical properties can of course be obtained if the proportion of waste paper in the raw materials mix is reduced and expensive cellulose materials such as e.g. kraft cellulose are used.As a result of the greater strength of such cellulose materials the paper manufactured from them also becomes stronger. Afurther possibility of improving the mechanical properties of paper is so-called "sizing", in which various binding materials are added to the paper in course of its manufacture, and they improve both the internal texture of the paper and thereby its mechanical properties and, when applied appropriately to the paper, the properties of its surface. The application of the binding material can take place either as so-called body sizing, by adding the binding material or materials to the paper pulp before forming the mat, or by socalled surface sizing in which the binding material or materials after suitable pre-treatment are applied to the surface of the paper during its manufacture.
The application of surface sizing can take place e.g.
by means of sizing presses. Sizing presses as a rule possess two counter-rotating rolls through which the paper web is passed and which thereby force a mixture of size into the paper web and/or distribute it over the surface. There is however also the possibility of spraying the size mixture on to the paper web during paper manufacture. Here spraying can take place either on one side or on both sides. Thus by applying gelantized maize starch to paper which predominantly consists of reconstituted waste paper the same mechanical properties are achieved as if this paper consisted only partly of waste paper, the remainder being cellulose. A similar effect is obtained if the paper is treated by spraying with a starch solution.
The object of the invention is to produce a paper for packing purposes, particularly for the manufacture of corrugated cardboard, which can be manufactured at low cost by simple means, predomin- antly using waste paper.
According to the present invention, paper having a waste paper proportional of up to 100% of the fibrous raw material used has additional material for surface sizing consisting of cereal matterand/ortub- ers and or roots which, after gelatinization of the starches contained in the additional materials together with the proteins contained in the additional materials after dispersion or solution, is applied to the surface of the paper being manufactured. The invention starts from the recognition that the manufacture of paper generally allows cheap raw materials and cheap additional materials to be used, which can not only be added to the materials in suspension in the course of re-cycling but additionally serve at the same time to produce a modified form of sizing material of gelatinized starch and dispersed, or possibly dissolved, proteins.At the same time one can avoid using for this purpose high-grade and therefore expensive starches such as e.g. potato starch or maize starch. Suitable cereals are e.g. wheat, rye, millet, maize-corn or the like, suitable tubers include potatoes or the like, suitable roots are manioc, taro orthe like. After gelatinization of the starch content, and separation either by sieving or by centrifuging, it is within the scope of the invention to add to the materials in suspension the fibres and pieces of husk contained in the raw material from grain and/or tubers and/or roots, in accordance with their fibrous character, before feeding this suspension into the paper-making machine.
Further preferred features of the invention are stated below. Thus the invention can be carried out in a way which provides that the surface sizing consists of gelatinized starch and dispersed and/or dissolved proteins of wheat (triticum vulgare) and if necessary a small addition of ammonium persulphate. Whilst the wheat proteins, by building up a skeleton structure, serve to increase the bonding forces, the ammonium persulphate addition provides a reduction of viscosity of the sizing material.When the gelatinized wheat-starch is applied to the web of paper it may be partly forced into it so that the result is a paper that possesses the following specific properties:
Weight/unit area: 128 g/m2
Size coating 8 glm2
Bursting pressure 4.1 bar
CMT (Surface crushing pressure according to DlN53143) 280
Denison pluck value 12
Corner crushing resistance according to DIN 53 149 23 kgf/cm2
According to another method of carrying out the invention the surface sizing is sprayed on to the paper web after gelatinization of the starch present in the wheat to produce a paper that possessses the following specific properties:: Weighfunit area 132 g/m2 Size coating 13 g/m2 Bursting pressure 3.6 bar
CMT (Surface crushing pressure according to
DIN 53 143) 190
Denison pluck value 16
Corner crushing resistance according to DIN 53 149 22 kgf/cm2
In this case unsorted waste paper was exclusively used as raw material and a mixture exclusively used as raw material and a mixture of water and wheat, after gelatinization of the starch present in the wheat and subsequent removal by sieving of the husk portion of the wheat, was sprayed on to the paper web before its final drying process.
In a process for the manufacture of paper in accordance with the invention, particularlyfortho manufacture of corrugated cardboard, unsorted and/or sorted waste paper is purified with cellulose if required, disintegrated in a pumping machine with addition of water, and transformed into a watery suspension, beaten, and with the addition of paper additives if required blended as a paper pulp, then formed into a continuous paper web and in course of a de-watering process undergoes preliminary drying, being subsequently sized on its surface and finally dried.This process is characterized in that 2% or more of additional material consisting of cereals and/or dried tubers and/or roots is added to up to 98% of waste paper, and that the starch contained in the additional material after partial or complete gelatinization, and the dispersed or dissolved proteins, is applied to the surface of the paper web for surface-sizing purposes before its final drying. In doing this the sizing medium can be pressed on to the paper web or pressed into it, or can be sprayed on.
According to an aspect of the invention of particular preference cereals of commercial quality are cleaned, stirred up with water and wet-pulverised, the resulting mixture is thermally and mechanically treated by steam under pressure, and from the resulting mixture of dissolved gelatinized starch,
partially dissolved, partially dispersed cereal proteins, and fibrous material from the husks of cereal
grains, the fibrous material is removed, e.g. by siev
ing or by centrifuging, and added in specified quan
tity as additional material to the waste paper con
stituent, whilst the gelatinized starch with the cereal proteins is supplied to the paper web as sizing.
Before application to the paper web, the starch present in the cereal is preferably gelatinized in the presence of the other constituents of the cereal in the watery phase at temperatures of more than 50"C, preferably at 1200C. The starch may be further broken down after gelatinization and before application to the paper web. 0.5 to 2.0% by weight, preferably 1% byweight, of ammonium persulphate or another oxidizing agent is preferably added to the mixture before, during or after wet-pulverization to reduce viscosity after the subsequent gelatinization.
As an example, 100 kg. of wheat of normal commercial quality, after cieaning to remove sand, dust, straw etc., was stirred up with 20 times the quantity of water in a containerwith stirring mechanism and the mixture was subjected to wet-pulverization.
Before wet-pulverization 0.85 kg. of ammonium persulphate was added to the mixture for the purpose of reducing viscosity after the subsequent gelatinization. After wet-pulverization this mixture was subjected to thermal and mechanical treatment by being conveyed by means of a constant-feed pump together with steam at 1.6 bar excess pressure. This mixture thus obtained of dissolved gelatinized starch with corn proteins which were partly dissolved and partly dispersed, and fibrous material from the husks of the wheat grains was then delivered to a vibrating screen to remove the fibrous materials. 14.3 kg. were sieved out. The fibrous materials sieved out were added to the waste paper in the suspension.Finally, after application of the size mixture with wheat proteins in a sizing press, the paper was subjected to a treatment in which it was passed over several steam-heated drying cylinders.
According to another method of carrying out the invention shredded taro roots are cleaned and wetpulverized in water, the resulting mixture is thermally treated by steam under pressure, and from the mixture of dissolved gelatinized starch and a dispersion of insoluble constituents thereby obtained these constituents are removed e.g. sieved or centrifuged out, and a predetermined quantity of such constituents is added to the charge of waste paper in the pulping machine, whilst the gelatinized starch together with the proteins is conveyed to the paper web for sizing. Thus in this case the mixture employed for surface sizing is obtained, not from cereals, but from 80 kg. of dried, shredded taro root. After
gelatinization of the starch content and dispersion of the insoluble eomponents a quantity of 3.2 kg., which is 4% of the original weight of root, was sieved out and, in order that use could be made of it, was added to the waste paper in the pulping machine. 82 9. of root constituents was contained in each kilog
ram of manufactured paper.
The advantages achieved by the invention are
essentially to be seen in that a paper for packing
purposes, particularly for the manufacture of corru
gated cardboard, and a process are specified, in
accordance with which the paper can be manufactured from waste paper in particularly simple and
economical manner, on the one hand making use of
cheaper additional materials and on the other hand
producing gelatinized starch from these cheap addi tional materials, so that the otherwise normal employment of expensive sizing materials using highgrade starch can be avoided.The strength of the paper is considerably increased by the proteins contained together with the starch in the cereals and/or in the tubers and/or in the roots, which according to the invention are not separated from the starch but are applied to the paper web in dispersed or dissolved form with the gelatinized and possibly still further broken-down starch.
In describing the invention further, reference will be made to the accompanying drawing, the single
Figure of which shows a section through paper according to the invention. The paper 1 comprises waste paper 2 and possibly paper additives, and features a surface sizing 3 which partly infiltrates into the waste paper and partly forms a thin surface skin.
The waste paper proportion amounts to up to 98%, whilst the remaining 2% or more consists of additional material from cereals and/or dried tubers and/or roots, in which the surface sizing 3 is based on the starch contained in the additional material together with the proteins contained in the additional material after their dispersion or solution. The surface sizing 3 can be pressed on to the paper web of waste paper 2 or can be sprayed on. An intimate bond to the web of paper is always ensured.
Claims (17)
1. A paper comprising a waste paper proportion of up to 100% of the fibrous raw material used, and additional material for the surface sizing consisting of cereals and/ortubers and/or roots which, after gelatinization of the starches contained in the additional materials together with the proteins contained in the additional materials after dispersion or solution, is applied to the surface of the paper being manufactured.
2. A paper as in Claim 1, wherein the surface sizing consists of gelatinized starch and cereal proteins of a normal commercial quality wheat.
3. A paper as in Claim 2, with a small addition of an oxidizing agent to the sizing.
4. A paper as in Claim 3, wherein the oxidizing agent is ammonium persulphate.
5. A paper as in any one of Claims 1 to 4, wherein the surface sizing is applied to the web of paper and is partly forced into it so that the paper possesses the following specific qualities:
Weight/unit area 128 g/m2
Size coating 8 glm2 Bursting pressure 4.1 bar
CMT (Surface crushing pressure according to
DIN 53 143) 280
Denison pluck value 12
Corner crushing resistance according to DIN 53 149 23 kgf/cm2
6. A paper as in any one of Claims 1 to 4, wherein the surface sizing is sprayed on to the web of paper to produce a paper that possesses the following specific qualities: Weighfunit area 132 g/m2
Size coating 13 g/m2
Bursting pressure 3.6 bar
CMT (Surface crushing pressure according to
DIN 53143) 190
Denison pluck value 16
Corner crushing resistance according to DIN 53 149 22 kgf/cm
7.A process for the manufacture of paper in which unsorted and/or sorted waste paper is disintegrated in a pulping machine with addition of water and transformed into a watery materials suspension, beaten, and blended as a paper pulp, then formed into a continuous paper web and in course of a de-watering process undergoes preliminary drying, being subsequently sized on its surface and finally dried, 2% or more of additional material consisting of cereals and/or dried tubers and/or roots being added to up to 98% of waste paper, and the starch contained in the additional material being applied, after partial or complete gelatinization, to the surface of the paper web for surface sizing purposes before its final drying.
8. A process as in Claim 7, wherein cereals of normal commercial quality are cleaned, stirred up with water and wet-pulverized, the resulting mixture is then thermally and mechanically treated by steam under pressure and from the resulting mixture of dissolved gelatinized starch, partly dissolved, partly dispersed cereal proteins and fibrous material the fibrous material is removed and added in specified quantity as additional material to the waste paper constituent, whilst the gelatinized starch with the cereal proteins is supplied to the paper web as sizing.
9. A process as in Claim 7 or 8, wherein the starch present in the cereal is gelatinized in the presence of the other constituents of the cereal in the watery phase at temperatures of more than 50"C before application to the paper web.
10. A process as in the Claim 9, wherein the temperature is 1200C.
11. A process as in any one of Claims 7 to 10, wherein the starch is further broken down after gelatinization before application to the paper web.
12. A process as in any one of Claims 7 to 11, wherein 0.5% to 2.0% by weight of an oxidizing agent is added to the mixture during wet-pulverization to reduce viscosity after the subsequent gelatinization.
13. A process as in Claim 12, wherein the oxidizing agent is 1% by weight.
14. A process as in Claim 12 or Claim 13, wherein the oxidizing agent is ammonium persulphate.
15. A process as in Claim 7, wherein shredded roots of taro or manioc are cleaned and wetpulverized in water, the resulting mixture is then thermally and mechanically treated by steam under pressure, from the mixture of dissolved gelatinized starch and a dispersion of insoluble constituents these constituents are removed, and a predetermined quantity of such constituents is added to the charge of waste paper in the pulping machine, whilst the gelatinized starch together with the proteins is conveyed to the paper web for sizing.
16. A paper substantially as hereinbefore described and with reference to the accompanying drawing.
17. A process for the manufacture of paper substantially as hereinbefore described.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2833452A DE2833452C2 (en) | 1978-07-29 | 1978-07-29 | Process for the manufacture of paper for packaging purposes, in particular for the manufacture of corrugated cardboard |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2026571A true GB2026571A (en) | 1980-02-06 |
| GB2026571B GB2026571B (en) | 1983-06-15 |
Family
ID=6045789
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7923900A Expired GB2026571B (en) | 1978-07-29 | 1979-07-09 | Paper for packing purposes and a process for its manufacture |
Country Status (12)
| Country | Link |
|---|---|
| JP (1) | JPS5522095A (en) |
| AT (1) | ATA473279A (en) |
| AU (1) | AU4899279A (en) |
| CA (1) | CA1103968A (en) |
| DE (1) | DE2833452C2 (en) |
| DK (1) | DK317779A (en) |
| FR (1) | FR2433613A1 (en) |
| GB (1) | GB2026571B (en) |
| IT (1) | IT1122187B (en) |
| NL (1) | NL7905703A (en) |
| SE (1) | SE7906280L (en) |
| SU (1) | SU931113A3 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5055161A (en) * | 1991-02-21 | 1991-10-08 | Green Bay Packaging Inc. | Multiple ply paper product containing an outer ply of reclaimed white office waste |
| US5061345A (en) * | 1991-02-21 | 1991-10-29 | Green Bay Packaging Inc. | Method of making a multiple ply paper product containing an outer ply of reclaimed white office waste |
| EP0500363A1 (en) * | 1991-02-21 | 1992-08-26 | Green Bay Packaging Inc. | Multiple ply paper product containing an outer ply of reclaimed white office waste and method of making the product |
| AU629739B2 (en) * | 1990-03-20 | 1992-10-08 | Green Bay Packaging Inc. | Multiple ply paperboard product and method of making the same |
| WO1994024003A1 (en) * | 1993-04-13 | 1994-10-27 | British United Shoe Machinery Limited | Carrier strap for a container |
| WO2002012620A1 (en) * | 2000-08-10 | 2002-02-14 | Metso Paper, Inc. | Method for manufacturing a coated fibre web, improved paper or board machine and coated paper or board |
| GB2422374A (en) * | 2003-03-21 | 2006-07-26 | Weston Foods Ltd | Alkali oxidised starch/protein mixtures |
| WO2013124542A1 (en) * | 2012-02-22 | 2013-08-29 | Kemira Oyj | Method for making of paper, tissue, board or the like |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS626997A (en) * | 1985-06-29 | 1987-01-13 | 神崎製紙株式会社 | Production of paper |
| DE4344139C2 (en) * | 1993-12-23 | 1997-08-07 | Inst Getreideverarbeitung | Process for the production of paper, cardboard and cardboard with improved performance properties |
| DE19530917A1 (en) * | 1995-08-23 | 1997-02-27 | Verena Wolff | Wallpaper paste |
| CN104099799B (en) * | 2014-07-02 | 2016-05-25 | 福建希源纸业有限公司 | A kind of pulping method that utilizes waster paper slag to produce slim vulcan fibre |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE370421C (en) * | 1920-06-23 | 1923-03-02 | Verwertung Inlaendischer Produ | Process for making paper |
| GB1282551A (en) * | 1968-06-04 | 1972-07-19 | Saloman Neumann | A process for the manufacture of sheet material |
| US3859108A (en) * | 1971-05-07 | 1975-01-07 | Lawrence Paper Co | Flour based paper size |
| US3808089A (en) * | 1971-08-17 | 1974-04-30 | Wright Chem Corp | Process and composition for manufacturing top liner and the like from printed and coated stock |
| GB1423253A (en) * | 1972-05-17 | 1976-02-04 | Isovolta | Process for the manufacture of a paper fluting or cardboard and products manufactured by the process |
| CH566445A5 (en) * | 1974-01-31 | 1975-09-15 | Bonda Ernst | Re-using waste-paper cellulose - for printed or unprinted wrapping-material, e.g. letter-envelopes |
-
1978
- 1978-07-29 DE DE2833452A patent/DE2833452C2/en not_active Expired
-
1979
- 1979-07-06 AT AT0473279A patent/ATA473279A/en not_active Application Discontinuation
- 1979-07-09 GB GB7923900A patent/GB2026571B/en not_active Expired
- 1979-07-16 IT IT24367/79A patent/IT1122187B/en active
- 1979-07-17 AU AU48992/79A patent/AU4899279A/en not_active Abandoned
- 1979-07-23 SE SE7906280A patent/SE7906280L/en not_active Application Discontinuation
- 1979-07-24 CA CA332,399A patent/CA1103968A/en not_active Expired
- 1979-07-24 NL NL7905703A patent/NL7905703A/en not_active Application Discontinuation
- 1979-07-26 SU SU792790404A patent/SU931113A3/en active
- 1979-07-27 FR FR7919484A patent/FR2433613A1/en active Granted
- 1979-07-27 DK DK317779A patent/DK317779A/en not_active Application Discontinuation
- 1979-07-28 JP JP9560179A patent/JPS5522095A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU629739B2 (en) * | 1990-03-20 | 1992-10-08 | Green Bay Packaging Inc. | Multiple ply paperboard product and method of making the same |
| US5055161A (en) * | 1991-02-21 | 1991-10-08 | Green Bay Packaging Inc. | Multiple ply paper product containing an outer ply of reclaimed white office waste |
| US5061345A (en) * | 1991-02-21 | 1991-10-29 | Green Bay Packaging Inc. | Method of making a multiple ply paper product containing an outer ply of reclaimed white office waste |
| EP0500363A1 (en) * | 1991-02-21 | 1992-08-26 | Green Bay Packaging Inc. | Multiple ply paper product containing an outer ply of reclaimed white office waste and method of making the product |
| WO1994024003A1 (en) * | 1993-04-13 | 1994-10-27 | British United Shoe Machinery Limited | Carrier strap for a container |
| WO2002012620A1 (en) * | 2000-08-10 | 2002-02-14 | Metso Paper, Inc. | Method for manufacturing a coated fibre web, improved paper or board machine and coated paper or board |
| GB2422374A (en) * | 2003-03-21 | 2006-07-26 | Weston Foods Ltd | Alkali oxidised starch/protein mixtures |
| GB2409861B (en) * | 2003-03-21 | 2006-12-13 | Weston Foods Ltd | Coating compositions |
| US7217316B2 (en) | 2003-03-21 | 2007-05-15 | George Weston Foods Limited | Coating compositions |
| GB2422374B (en) * | 2003-03-21 | 2007-08-08 | Weston Foods Ltd | Coating compositions |
| WO2013124542A1 (en) * | 2012-02-22 | 2013-08-29 | Kemira Oyj | Method for making of paper, tissue, board or the like |
| US9279217B2 (en) | 2012-02-22 | 2016-03-08 | Kemira Oyj | Method for making of paper, tissue, board or the like |
Also Published As
| Publication number | Publication date |
|---|---|
| GB2026571B (en) | 1983-06-15 |
| JPS5522095A (en) | 1980-02-16 |
| ATA473279A (en) | 1983-09-15 |
| CA1103968A (en) | 1981-06-30 |
| SE7906280L (en) | 1980-01-30 |
| FR2433613B3 (en) | 1981-06-12 |
| AU4899279A (en) | 1980-01-31 |
| DK317779A (en) | 1980-01-30 |
| IT1122187B (en) | 1986-04-23 |
| FR2433613A1 (en) | 1980-03-14 |
| DE2833452A1 (en) | 1980-02-07 |
| NL7905703A (en) | 1980-01-31 |
| IT7924367A0 (en) | 1979-07-16 |
| DE2833452C2 (en) | 1982-03-11 |
| SU931113A3 (en) | 1982-05-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |