GB577676A - Improvements in or relating to the production of reinforced plastic articles - Google Patents
Improvements in or relating to the production of reinforced plastic articlesInfo
- Publication number
- GB577676A GB577676A GB2106443A GB2106443A GB577676A GB 577676 A GB577676 A GB 577676A GB 2106443 A GB2106443 A GB 2106443A GB 2106443 A GB2106443 A GB 2106443A GB 577676 A GB577676 A GB 577676A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- paper
- resin
- pressure
- crimping
- 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
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
Landscapes
- Laminated Bodies (AREA)
- Moulding By Coating Moulds (AREA)
- Reinforced Plastic Materials (AREA)
Abstract
Reinforced plastic articles of complex or curved form are produced by moulding under heat and pressure sheets of creped material which have retained the greater part of their hygroscopic moisture and incorporate a phenolic resin in the A stage or a cresylic resin in a similar stage, i.e. fusible and soluble, the sheets being assembled in stacks with the crimps of adjacent sheets mutually inclined and the pressure applied intermittently. Paper made from sisal fibres with long fibres well felted together is preferably used, urea being introduced into the pulp and the paper treated prior to the creping process by wetting with starch or dextrine. The degree of crimping is such that it is not wholly removed in the moulding process, e.g. a 100 per cent crimping is given to the paper which when stretched in the mould retains 15 per cent crimping. One quantity of paper is coated with 35 per cent by weight of a thermosetting plastic such as a phenolic or cresylic resin and another quantity with 70 per cent by weight. The amounts may be smaller, e.g. 20-30 per cent and 60-70 per cent respectively. The paper blanks having the lower resin content are enclosed in sandwich form between two lots of blanks having the higher resin content, each paper blank having its crimps in a direction at an angle, e.g. 45 degrees, to adjacent sheets, the change of angle being continuous in the same direction throughout the stack. The whole is subjected to pressure in a press of 200-350 lbs./sq. in. at a temperature of 100-135 DEG C., preferably 135 DEG C. In the initial stage, the pressure is released and the dies removed several times. In a further example, a felted core of sisal fibres containing 35 per cent phenolic or cresylic resin is enclosed between two sets of several blanks of crepe paper containing 70 per cent resin, each blank being at an angle to the adjacent sheet, and subjected to pressure between male and female dies to give the desired mould.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2106443A GB577676A (en) | 1943-12-15 | 1943-12-15 | Improvements in or relating to the production of reinforced plastic articles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2106443A GB577676A (en) | 1943-12-15 | 1943-12-15 | Improvements in or relating to the production of reinforced plastic articles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB577676A true GB577676A (en) | 1946-05-28 |
Family
ID=10156593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2106443A Expired GB577676A (en) | 1943-12-15 | 1943-12-15 | Improvements in or relating to the production of reinforced plastic articles |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB577676A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1188156B (en) * | 1960-03-11 | 1965-03-04 | Westinghouse Electric Corp | Process for the production of angled insulating parts with a U-shaped cross-section |
| US3189681A (en) * | 1960-03-11 | 1965-06-15 | Westinghouse Electric Corp | Angular channel-shaped coil insulation |
| US3483071A (en) * | 1962-08-10 | 1969-12-09 | Cincinnati Ind Inc | Universally stretchable paper laminate |
| US4599124A (en) * | 1979-11-16 | 1986-07-08 | General Electric Company | High impact resistant laminate surface for a bowling lane |
-
1943
- 1943-12-15 GB GB2106443A patent/GB577676A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1188156B (en) * | 1960-03-11 | 1965-03-04 | Westinghouse Electric Corp | Process for the production of angled insulating parts with a U-shaped cross-section |
| US3189681A (en) * | 1960-03-11 | 1965-06-15 | Westinghouse Electric Corp | Angular channel-shaped coil insulation |
| US3483071A (en) * | 1962-08-10 | 1969-12-09 | Cincinnati Ind Inc | Universally stretchable paper laminate |
| US4599124A (en) * | 1979-11-16 | 1986-07-08 | General Electric Company | High impact resistant laminate surface for a bowling lane |
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