WO1993003920A1 - Pressed, disc shaped material, use of the material and method for the production thereof - Google Patents
Pressed, disc shaped material, use of the material and method for the production thereof Download PDFInfo
- Publication number
- WO1993003920A1 WO1993003920A1 PCT/SE1992/000563 SE9200563W WO9303920A1 WO 1993003920 A1 WO1993003920 A1 WO 1993003920A1 SE 9200563 W SE9200563 W SE 9200563W WO 9303920 A1 WO9303920 A1 WO 9303920A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gmt
- mould part
- temperature
- pressed
- film
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2009/00—Layered products
Definitions
- the present invention relates to a pressed sheetformed material which consists of plastics and glass fibres and which can be used as an equipment material in vehicles , buildings, e t c, especially as dashboard and equipment details in cars .
- a known application for such materials are as equipment details in cars. In these the perhaps most dominant use of the plastic materials are as dashboards and as protection or shields at different places.
- Dashboards for cars consist today mostly of a polyurethane plastics which is a foam material without mechanical strength with an outer layer of a plastic sheet.
- the plastic materials are mounted on an inner plate or the like. Apertures for different instruments in the dashboard are usually reinforced with plate details.
- the outer sheet should be mixed with plasticizers or for instance other plastic materials such as polyvinyl chloride to get the right properties. It is also usual that the outer layer is painted, partly to give the surface the right pleasant appearance, partly to prevent evaporation of additions to the plastics, which additions bring about so called fogging which means covering on the windscreens and the like.
- the polymer in the GMT-material consists of polypropene having a material temperature of 190-200°C and the polymer in the thinner layer of polypropene with a melting point of 145- 150°C.
- the glass mat reinforced polymer GMT should have a content of glass fibres of about 30-40 weight-%.
- the invention includes further use of the pressed material as a construction material for details or equipments in for example cars and airplanes, especially as dashboards.
- the invention comprises further a method for the production of pressed sheetshaped materials in accordance with the invention which is characterized in that one produces a pre-shaped thermoplastic film in a negative mould part whereupon one or more layers of flowable glass mat reinforced thermopolymers (GMT) at the flowing temperature is introduced into the mould on the pre-formed thermoplastic film and that the material thereafter is joined and formed by pressure and heat.
- GMT flowable glass mat reinforced thermopolymers
- the positive mould part that means the male part
- the negative mould part that is the female part
- the pre-formed film should according to the invention have a thickness of about 1,5-2,0 millimetres and should be embossed on that side that shall adhere to the GMT- material.
- the joining and the forming of the material occurs by means of a pressure of about 150-200 bar (15-20 N/mm 2 ) and heat.
- the negative mould part should be embossed so that gases released can escape and the surface of the finished product get a pleasant appearance.
- FIGURE DESCRIPTION
- a negative mould part 1 and a positive mould part 2 are shown.
- the mould part 1 one has first introduced a pre-shaped and pre-pressed film 3 which in the present case consists of polypropene having a melt point of 145-150°C.
- the thickness of this film is about 1,5-2,0 millimetres.
- the reason for this is primarily that the negative mould part 1 is embossed so that air and gases are allowed to escape and that the film shall be able to receive this embossment form. If the film is too thick it will not get this embossment pattern, if it is too thin it will not be sufficiently strong.
- GMT glass mat reinforced thermopolymer
- This material consists in the present case of polypropene having a melting point of 190-200°C and the content of glass fibres in the polypropene is about 40 weight-%. Even other contents of glass fibres for example 27 or 30% can be thinkable as such are commonly available in the market.
- the positive mould part 2 is pressed against the negative mould part 1 at a pressure of 120-200 bar (15-20 N/mm 2 ) .
- This pressure should be maintained during only about 20 seconds which means that introducing of materials, pressing and removing of the finished product requires 40-50 seconds or at most one minute. Compared to earlier known methods as mentioned above, this means a time saving of 3-4 minutes for each pressing.
- the GMT-material has been introduced into the mould in three layers having different size. It is important that the GMT-material is introduced in a proper way and in the present case this material has been adapted so that it shall flow upwards in the mould and fill this accurately. Therefore the three layers have been made in the way which is shown.
- the GMT- material flows out as mentioned and maintains also during the flowing the even distribution of glass fibres so that the product gets a homogeneous composition all through.
- the pre-formed film 3 does however not flow out as it abuts against a surface well under the melt point and maintains its pre-pressed shape. This means also that the pre-pressed film 3 can be given folded edges in advance as the flowable GMT-material will fill up the cavities which are formed through this folding. Any folding of the film afterwards will therefore not be necessary and the joining of the film and the GMT-material occurs consequently completely in one single operation.
- the negative mould part has as said above a temperature of 60-70°C whereas the positive mould part can be somewhat cooler and have a temperature of 40-50°C.
- the positive mould part can be somewhat cooler and have a temperature of 40-50°C.
- the product and the method according to the present invention is also environmentally adapted.
- the only effluent gases which arise are small amounts of liberated propene at the pressing operation.
- the finished product is in itself also environmentally friendly in that it comprises only one type of plastics, preferably polypropene. This facilitates highly the final destruction of the material which besides the plastics only contains glass fibres, which material as is well known is environmentally friendly.
- the material according to the invention does not have the same tendency to so called "fogging" as earlier known materials.
- the material according to the present invention is especially suitable as material in dashboards and equipment details for cars, airplanes and the like. It can however also be used for different purposes for example as glove lockers in cars, shields against cold air streams in the drivers compartment in lorries, as parts of the engine bonnet in lorries but also as equipment parts of different kinds for example in chairs and diverse furniture.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP92918459A EP0666799A1 (en) | 1991-08-19 | 1992-08-19 | Pressed, disc shaped material, use of the material and method for the production thereof |
JP5503925A JPH06509757A (en) | 1991-08-19 | 1992-08-19 | Press-formed disc-shaped material, its uses and manufacturing method |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9102387-9 | 1991-08-19 | ||
SE9102387A SE468977B (en) | 1991-08-19 | 1991-08-19 | PROCEDURES FOR PREPARING PRESS SHAPED MATERIALS. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1993003920A1 true WO1993003920A1 (en) | 1993-03-04 |
Family
ID=20383496
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/SE1992/000563 WO1993003920A1 (en) | 1991-08-19 | 1992-08-19 | Pressed, disc shaped material, use of the material and method for the production thereof |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0666799A1 (en) |
JP (1) | JPH06509757A (en) |
SE (1) | SE468977B (en) |
WO (1) | WO1993003920A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003022578A1 (en) * | 2001-09-11 | 2003-03-20 | The Australian National University | Solar energy concentrating assembly and sub-components thereof |
WO2006084364A1 (en) * | 2005-02-09 | 2006-08-17 | Magna International Inc. | Method of manufacturing a semi-structural panel |
US7591973B2 (en) | 2002-11-28 | 2009-09-22 | Mitsubishi Rayon Co., Ltd. | Method for producing a fiber-reinforced composite material plate |
US7714593B2 (en) | 2003-12-18 | 2010-05-11 | Upm-Kymmene Corporation | Radiofrequency based sensor arrangement and a method |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4668729A (en) * | 1983-12-15 | 1987-05-26 | Asahi Kasei Kogyo Kabushiki Kaisha | Process for compression molding of thermoplastic resin and moldings molded by said process |
SE463548B (en) * | 1988-09-20 | 1990-12-10 | Molybon Agenturer Ab | PROCEDURE FOR MANUFACTURE OF RIGID PRODUCTS WITH HIGH-CLASS FINISHED FINISH, SPECIFICALLY MODELED PLASTIC |
-
1991
- 1991-08-19 SE SE9102387A patent/SE468977B/en not_active IP Right Cessation
-
1992
- 1992-08-19 JP JP5503925A patent/JPH06509757A/en active Pending
- 1992-08-19 EP EP92918459A patent/EP0666799A1/en not_active Withdrawn
- 1992-08-19 WO PCT/SE1992/000563 patent/WO1993003920A1/en not_active Application Discontinuation
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4668729A (en) * | 1983-12-15 | 1987-05-26 | Asahi Kasei Kogyo Kabushiki Kaisha | Process for compression molding of thermoplastic resin and moldings molded by said process |
SE463548B (en) * | 1988-09-20 | 1990-12-10 | Molybon Agenturer Ab | PROCEDURE FOR MANUFACTURE OF RIGID PRODUCTS WITH HIGH-CLASS FINISHED FINISH, SPECIFICALLY MODELED PLASTIC |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003022578A1 (en) * | 2001-09-11 | 2003-03-20 | The Australian National University | Solar energy concentrating assembly and sub-components thereof |
US7591973B2 (en) | 2002-11-28 | 2009-09-22 | Mitsubishi Rayon Co., Ltd. | Method for producing a fiber-reinforced composite material plate |
US7959838B2 (en) | 2002-11-28 | 2011-06-14 | Mitsubishi Rayon Co., Ltd. | Epoxy resin for prepreg, prepreg, fiber-reinforced composite material and methods for production thereof |
US8470435B2 (en) | 2002-11-28 | 2013-06-25 | Mitsubishi Rayon Co., Ltd. | Epdxy resin for prepreg, prepreg, fiber-reinforced composite material, and methods for production thereof |
US8486518B2 (en) | 2002-11-28 | 2013-07-16 | Mitsubishi Rayon Co., Ltd. | Epoxy resin for prepreg, prepreg, and fiber-reinforced composite material and methods for production thereof |
US7714593B2 (en) | 2003-12-18 | 2010-05-11 | Upm-Kymmene Corporation | Radiofrequency based sensor arrangement and a method |
WO2006084364A1 (en) * | 2005-02-09 | 2006-08-17 | Magna International Inc. | Method of manufacturing a semi-structural panel |
Also Published As
Publication number | Publication date |
---|---|
SE9102387L (en) | 1993-02-20 |
JPH06509757A (en) | 1994-11-02 |
SE9102387D0 (en) | 1991-08-19 |
EP0666799A1 (en) | 1995-08-16 |
SE468977B (en) | 1993-04-26 |
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