GB492181A - Improvements in or relating to the manufacture of fibrous sheets - Google Patents
Improvements in or relating to the manufacture of fibrous sheetsInfo
- Publication number
- GB492181A GB492181A GB757937A GB757937A GB492181A GB 492181 A GB492181 A GB 492181A GB 757937 A GB757937 A GB 757937A GB 757937 A GB757937 A GB 757937A GB 492181 A GB492181 A GB 492181A
- Authority
- GB
- United Kingdom
- Prior art keywords
- slurry
- chlorinated rubber
- sheets
- fibrous
- parts
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
- B29B15/122—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length with a matrix in liquid form, e.g. as melt, solution or latex
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Paper (AREA)
Abstract
Fibrous sheets or webs are made from chlorinated rubber by forming a slurry of fibrous chlorinated rubber, which may be produced as described in Specification 402,454, in water or other non-solvent for the chlorinated rubber, delivering the slurry on to a fine meshed gauze or like porous backing, draining off the liquid and subsequently drying the sheet or layer so formed. The concentration of the slurry is preferably less than 2 per cent. Small amounts of a binding agent may be added, e.g. ,01-1 per cent calculated on the slurry, of water glass, glue, gelatine or an alkyl cellulose such as methyl cellulose, or up to 5 per cent of rubber latex. Other fibrous materials, e.g. asbestos, paper pulp, manilla pulp, in amounts up to 10 per cent of the chlorinated rubber may also be incorporated. In an example, 20 parts of fibrous chlorinated rubber were added to 1000 parts of water and the mixture agitated for two hours to produce a homogeneous slurry. 1000 parts of water and 20 parts of latex were added and the resulting slurry was poured on a 250 mesh screen at the rate of 6 lb. per sq. foot to produce an even layer. As much liquid as possible was sucked through and the layer was removed from the screen and dried in a current of air at 50 DEG C. The dried sheet was a felt-like material about 5 mms. thick. Sheets formed by the process may be pressed or rolled before or after drying, greater pressure, e.g. up to 100 lb. per sq.in., producing a parchment-like product. A composite board having a low density interior protected by less permeable more resistant surfaces may be made by first forming two sheets as far as the pressing stage, pouring a layer of slurry on one of the sheets, draining, and then applying the second sheet and consolidating by light pressure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB757937A GB492181A (en) | 1937-03-15 | 1937-03-15 | Improvements in or relating to the manufacture of fibrous sheets |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB757937A GB492181A (en) | 1937-03-15 | 1937-03-15 | Improvements in or relating to the manufacture of fibrous sheets |
Publications (1)
Publication Number | Publication Date |
---|---|
GB492181A true GB492181A (en) | 1938-09-15 |
Family
ID=9835844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB757937A Expired GB492181A (en) | 1937-03-15 | 1937-03-15 | Improvements in or relating to the manufacture of fibrous sheets |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB492181A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111622016A (en) * | 2020-04-30 | 2020-09-04 | 南京珈时新材料科技有限公司 | Pressure-resistant heat-insulating paper containing hollow porous silica microspheres and preparation method thereof |
-
1937
- 1937-03-15 GB GB757937A patent/GB492181A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111622016A (en) * | 2020-04-30 | 2020-09-04 | 南京珈时新材料科技有限公司 | Pressure-resistant heat-insulating paper containing hollow porous silica microspheres and preparation method thereof |
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