CA1314802C - Non-inflammable light-weighing tough board - Google Patents
Non-inflammable light-weighing tough boardInfo
- Publication number
- CA1314802C CA1314802C CA000561151A CA561151A CA1314802C CA 1314802 C CA1314802 C CA 1314802C CA 000561151 A CA000561151 A CA 000561151A CA 561151 A CA561151 A CA 561151A CA 1314802 C CA1314802 C CA 1314802C
- Authority
- CA
- Canada
- Prior art keywords
- weighing
- toughening
- inflammable
- tough
- board
- 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
Links
- 238000005303 weighing Methods 0.000 title abstract description 6
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 10
- 239000003365 glass fiber Substances 0.000 claims description 8
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims description 8
- 235000019353 potassium silicate Nutrition 0.000 claims description 6
- ABLZXFCXXLZCGV-UHFFFAOYSA-N Phosphorous acid Chemical compound OP(O)=O ABLZXFCXXLZCGV-UHFFFAOYSA-N 0.000 claims description 4
- 239000000919 ceramic Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000000835 fiber Substances 0.000 claims description 4
- 239000003513 alkali Substances 0.000 claims description 3
- 239000011111 cardboard Substances 0.000 abstract description 16
- 239000000463 material Substances 0.000 abstract description 4
- 239000012784 inorganic fiber Substances 0.000 abstract description 3
- 239000012745 toughening agent Substances 0.000 abstract description 3
- 238000005192 partition Methods 0.000 abstract description 2
- 238000001035 drying Methods 0.000 abstract 1
- 239000000123 paper Substances 0.000 description 10
- 239000000203 mixture Substances 0.000 description 4
- 239000004115 Sodium Silicate Substances 0.000 description 2
- 239000011491 glass wool Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052911 sodium silicate Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004035 construction material Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000011087 paperboard Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Landscapes
- Paper (AREA)
Abstract
Abstract of the Disclosure Non-inflammable light-weighing tough boards to be used for structural and decorative material in housing and building, such as, decorative ceiling boards, sliding door overlays, partitions and so on, prepared by corrugating cardboard made of phosphated wood pulp and inorganic fiber and processing the so obtained corrugated board by impregnating with a toughening solution of inorganic toughening agent and then drying it.
Description
131~0~
Title of the Invention NON-INFLAMMABLE LIGHT WEIGHING TOUGH BOARD
Backqround of the Invention 1. Field of the Invention Present invention relates to non-inflammable light-weighing tough boards, in particular, corrugated cardboards to be used for structural and decorative material in housings and buildings, such as, ceiling decorative boards, sliding door overlays, partitions and so on.
Title of the Invention NON-INFLAMMABLE LIGHT WEIGHING TOUGH BOARD
Backqround of the Invention 1. Field of the Invention Present invention relates to non-inflammable light-weighing tough boards, in particular, corrugated cardboards to be used for structural and decorative material in housings and buildings, such as, ceiling decorative boards, sliding door overlays, partitions and so on.
2. Description of the Prior Art While there are used for manufacturing non-inflammable interior construction materials such as ceiling boards etc., non-inflammable excelsior boards and board made from mineral wools, such as, gypsum whisker, whiskered blast furnace slag, glass wool and so on, all these prior art materials are heavy in weight and are inconvenient in the transport and in the assemblage work etc.
On the other hand, there have also been found in the market sheet products made of paper toughened by impregnating with synthetic resins, such as phenol resin etc. However, they are not cost-saving, since high price chemical products are used for the manufacture thereof.
Summary of the Invention The object of the present invention is to provide non-inflammable light-weighing tough boards of low price.
1/1 ~
~3~8~2 Using water-glass for the impregnating agent, one may expect a cost-saving. When paper is impregnated with this chemical, however, the thus obtained impregnated paper will soon deteriorate and become tattered, since water-glass is a strong alkaline material~
The inventor had given his attention to the fact that phosphated pulp, namely, pulp esterified with phosphonic acid, is non-inflammable and paper is producable with phosphonic acid which is resi.stant to strong-alkali upon the i31~8~2 admixing to this phosphated pulp ceramic fiber or glass fiber.
Therefore, the inventor had tried to prepare cardboards of profiled section by corrugating (that is, processing into a truss of honeycomb structure) cardboard of such phosphated pulp and then impregnating the so corrugated board with water-glass. This resulted in corrugated cardboard which was not only non-inflammable but also light-weight and tough.
This cardboard was found to be excellent in absorbing sound, since the porosity of the inorganic fiber interstices was retained therein.
Description of the Preferred Embodiments The present invention comprises a non-inflammable light-weight tough board prepared by forming corrugated cardboard of phosphated wood pulp and inorganic fiber and processing the corrugated cardboard by impregnating the cardboard with a toughening solution of an inorganic impregnating agent.
The non-inflammable light-weight tough board preferably includes phosphated pulp such as wood pulp esterified with phosphonic acid. The esterified pulp is mixed with one of ceramic fiber and glass fiber forming a paper element. The paper element which is formed of esterified pulp and ceramic or glass fiber is arranged to form a cardboard structure which may be impregnated with a toughening solution such as an inorganic toughening agent.
The inorganic toughening agent may be a strong alkali and according to a preferred embodiment of the invention, the toughening solution is water-glass. The paper is preferably formed by corrugating it -- ~3~02 into a desired shape such as a honeycomb, truss or other shape, The esterified wood pulp is preferably 50% by weight of the paper mixture. The esterified wood pulp may also be in the range of 70%
by weight of the pulp fiber mixture.
Example 1.
50% by weight of phosphated wood pulp and 50% by weight of a glass wool product were mixed together and, from this mixture, paper was prepared, which had the following characteristic values:
Basic weight 170.0 g Thickness 0.72 Density 0.24 Tensile modulus 12.9 Kg This paper was corrugated and the so corrugated paper board was then impregnated with a toughening solution based on sodium silicate and was dried.
The so obtained board exhibited a strength of 3.6 Kg/m2, in contrast to that of 1.2 Kg/m2 for the original corrugated board before the impregnation.
Example 2.
The paper which was prepared from a mixture of 70% by weight of phosphated wood pulp with 30% by weight of a glass fiber product had the following characteristics value:
Basic weight170.0 g Thickness 0.69 Density 0.25 Tensil modulus12.6 Kg ~3~02 Subsequently, this paper was processed by corrugating and impregnating it with a toughening solution based on sodium silicate and was then dried.
The 50 obtained board exhibited a strength of 3.0 Kg/m2, whereas that of the corrugated board before the processing was 1.2 Kg/m2. The cardboard processed in accordance with the present invention was found to withstand to a burn-through test at 800~C
for more than 5 minutes, whereas the cardboard without being subjected to such processing was burnt down within 2~3 seconds in the test.
The cardboard according to the present invention as prepared as above is light-weighing and therefore is easy in handling. The cardboard is of low price, since it is made of phosphated pulp, glass fiber and water-glass. It is thus able to provide products having sound absorbing property owing to the porosity by glass fiber. Due to the corrugated structure and the toughening treatment by the impregnating agent, the cardboard according to the present invention is tough and, in addition, non-.inflammable, since the cardboard is made of phosphated wood pulp, glass fiber and the impregnated inorganic salt.
On the other hand, there have also been found in the market sheet products made of paper toughened by impregnating with synthetic resins, such as phenol resin etc. However, they are not cost-saving, since high price chemical products are used for the manufacture thereof.
Summary of the Invention The object of the present invention is to provide non-inflammable light-weighing tough boards of low price.
1/1 ~
~3~8~2 Using water-glass for the impregnating agent, one may expect a cost-saving. When paper is impregnated with this chemical, however, the thus obtained impregnated paper will soon deteriorate and become tattered, since water-glass is a strong alkaline material~
The inventor had given his attention to the fact that phosphated pulp, namely, pulp esterified with phosphonic acid, is non-inflammable and paper is producable with phosphonic acid which is resi.stant to strong-alkali upon the i31~8~2 admixing to this phosphated pulp ceramic fiber or glass fiber.
Therefore, the inventor had tried to prepare cardboards of profiled section by corrugating (that is, processing into a truss of honeycomb structure) cardboard of such phosphated pulp and then impregnating the so corrugated board with water-glass. This resulted in corrugated cardboard which was not only non-inflammable but also light-weight and tough.
This cardboard was found to be excellent in absorbing sound, since the porosity of the inorganic fiber interstices was retained therein.
Description of the Preferred Embodiments The present invention comprises a non-inflammable light-weight tough board prepared by forming corrugated cardboard of phosphated wood pulp and inorganic fiber and processing the corrugated cardboard by impregnating the cardboard with a toughening solution of an inorganic impregnating agent.
The non-inflammable light-weight tough board preferably includes phosphated pulp such as wood pulp esterified with phosphonic acid. The esterified pulp is mixed with one of ceramic fiber and glass fiber forming a paper element. The paper element which is formed of esterified pulp and ceramic or glass fiber is arranged to form a cardboard structure which may be impregnated with a toughening solution such as an inorganic toughening agent.
The inorganic toughening agent may be a strong alkali and according to a preferred embodiment of the invention, the toughening solution is water-glass. The paper is preferably formed by corrugating it -- ~3~02 into a desired shape such as a honeycomb, truss or other shape, The esterified wood pulp is preferably 50% by weight of the paper mixture. The esterified wood pulp may also be in the range of 70%
by weight of the pulp fiber mixture.
Example 1.
50% by weight of phosphated wood pulp and 50% by weight of a glass wool product were mixed together and, from this mixture, paper was prepared, which had the following characteristic values:
Basic weight 170.0 g Thickness 0.72 Density 0.24 Tensile modulus 12.9 Kg This paper was corrugated and the so corrugated paper board was then impregnated with a toughening solution based on sodium silicate and was dried.
The so obtained board exhibited a strength of 3.6 Kg/m2, in contrast to that of 1.2 Kg/m2 for the original corrugated board before the impregnation.
Example 2.
The paper which was prepared from a mixture of 70% by weight of phosphated wood pulp with 30% by weight of a glass fiber product had the following characteristics value:
Basic weight170.0 g Thickness 0.69 Density 0.25 Tensil modulus12.6 Kg ~3~02 Subsequently, this paper was processed by corrugating and impregnating it with a toughening solution based on sodium silicate and was then dried.
The 50 obtained board exhibited a strength of 3.0 Kg/m2, whereas that of the corrugated board before the processing was 1.2 Kg/m2. The cardboard processed in accordance with the present invention was found to withstand to a burn-through test at 800~C
for more than 5 minutes, whereas the cardboard without being subjected to such processing was burnt down within 2~3 seconds in the test.
The cardboard according to the present invention as prepared as above is light-weighing and therefore is easy in handling. The cardboard is of low price, since it is made of phosphated pulp, glass fiber and water-glass. It is thus able to provide products having sound absorbing property owing to the porosity by glass fiber. Due to the corrugated structure and the toughening treatment by the impregnating agent, the cardboard according to the present invention is tough and, in addition, non-.inflammable, since the cardboard is made of phosphated wood pulp, glass fiber and the impregnated inorganic salt.
Claims (3)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A board structure, comprising:
paper sheets including from 50% to 70% by weight phosphated wood pulp formed of wood pulp and phosphonic acid, and from 30% to 50% by weight of one of ceramic fiber and glass fiber, said paper sheets being corrugated; and, a toughening solution formed of an inorganic impregnating agent, said toughening solution being positioned on and impregnating said paper sheets.
paper sheets including from 50% to 70% by weight phosphated wood pulp formed of wood pulp and phosphonic acid, and from 30% to 50% by weight of one of ceramic fiber and glass fiber, said paper sheets being corrugated; and, a toughening solution formed of an inorganic impregnating agent, said toughening solution being positioned on and impregnating said paper sheets.
2. A board according to Claim 1, wherein said toughening solution is a strong alkali.
3. A board according to Claim 1, wherein said toughening solution is water-glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000561151A CA1314802C (en) | 1988-03-10 | 1988-03-10 | Non-inflammable light-weighing tough board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000561151A CA1314802C (en) | 1988-03-10 | 1988-03-10 | Non-inflammable light-weighing tough board |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1314802C true CA1314802C (en) | 1993-03-23 |
Family
ID=4137621
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000561151A Expired - Lifetime CA1314802C (en) | 1988-03-10 | 1988-03-10 | Non-inflammable light-weighing tough board |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1314802C (en) |
-
1988
- 1988-03-10 CA CA000561151A patent/CA1314802C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed | ||
| MKEC | Expiry (correction) |
Effective date: 20121205 |