NO762577L - - Google Patents
Info
- Publication number
- NO762577L NO762577L NO762577A NO762577A NO762577L NO 762577 L NO762577 L NO 762577L NO 762577 A NO762577 A NO 762577A NO 762577 A NO762577 A NO 762577A NO 762577 L NO762577 L NO 762577L
- Authority
- NO
- Norway
- Prior art keywords
- stated
- weight
- sheet
- polypropylene
- percent
- Prior art date
Links
- 238000000034 method Methods 0.000 claims description 27
- 229920001155 polypropylene Polymers 0.000 claims description 22
- 239000004743 Polypropylene Substances 0.000 claims description 21
- -1 polypropylene Polymers 0.000 claims description 20
- 239000004793 Polystyrene Substances 0.000 claims description 13
- 229920002223 polystyrene Polymers 0.000 claims description 13
- 229920005653 propylene-ethylene copolymer Polymers 0.000 claims description 13
- 229920001169 thermoplastic Polymers 0.000 claims description 9
- 239000000454 talc Substances 0.000 claims description 8
- 229910052623 talc Inorganic materials 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000004698 Polyethylene Substances 0.000 claims description 3
- 229920000573 polyethylene Polymers 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 229920001577 copolymer Polymers 0.000 claims 4
- 125000005521 carbonamide group Chemical group 0.000 claims 1
- 239000004156 Azodicarbonamide Substances 0.000 description 6
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 6
- 235000019399 azodicarbonamide Nutrition 0.000 description 6
- 230000005484 gravity Effects 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 4
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 3
- 239000005977 Ethylene Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000009864 tensile test Methods 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229920001519 homopolymer Polymers 0.000 description 2
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 2
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229920001038 ethylene copolymer Polymers 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920005606 polypropylene copolymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/56—After-treatment of articles, e.g. for altering the shape
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
- B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
- B29C44/505—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying extruding the compound through a flat die
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0012—Combinations of extrusion moulding with other shaping operations combined with shaping by internal pressure generated in the material, e.g. foaming
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- 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
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/008—Wide strips, e.g. films, webs
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Description
"Fremgangsmåte for fremstilling av et lett polypropylen ark, og ark fremstilt ved fremgangsmåten". "Procedure for the production of a light polypropylene sheet, and sheet produced by the method".
Den her beskrevne oppfinnelse omfatter et særlig lettThe invention described here comprises a particularly light
ark som hovedsakelig eller i det vesentlige består av polypropylen som er gjort lett, samt selve framstillingsprosessen, sheets that mainly or essentially consist of polypropylene that has been made light, as well as the manufacturing process itself,
nemlig en ekstruderingsprosess som foregår ved hjelp av en plate-eller arkdyse. namely an extrusion process that takes place using a plate or sheet nozzle.
At man kan ekstrudere lette ark av termoplastisk polymer ved hjelp av en platedyse , er allerede kjent. I. de hittil kjente prosesser av denne type har det vist seg nødvendig å av-kjøle iallfall den ene side av arket straks det kommer ut av dysen. Fransk patent nr. 1 393 599 beskriver en slik ekstruderingsprosess hvor avkjølingen foregår med luft ved hjelp av et spesialkonstruert oppblåsingsapparat. It is already known that light sheets of thermoplastic polymer can be extruded using a plate die. In the hitherto known processes of this type, it has proved necessary to cool at least one side of the sheet as soon as it comes out of the die. French patent no. 1 393 599 describes such an extrusion process where the cooling takes place with air using a specially designed inflation device.
Anvendt på polypropylen og propylenetylenkopolymerer resulterer denne prosess i lette ark som kan være fra 1 til 3 Applied to polypropylene and propylene ethylene copolymers, this process results in lightweight sheets that can be from 1 to 3
mm tykke og ha en romvekt på mellom 0,3 og 0,6. Disse arkene er varme-formbare til en middeldybde på 1/3 (idet varmeformbarhets-dybden defineres som forholdet mellom avtrykkets dybde og det flate arks største dimensjon pr. avtrykk før varmeformingen). mm thick and have a specific gravity of between 0.3 and 0.6. These sheets are heat-formable to an average depth of 1/3 (whereas the heat-formability depth is defined as the ratio between the depth of the impression and the largest dimension of the flat sheet per impression before heat-forming).
Patentsøkeren har imidlertid oppdaget at man, når det gjelder propylen og.propylenetylen-kopolymerer, kan fremstille ark med andre egenskeper enn de tidligere beskrevne - f.eks. en romvekt på fra 0,65 til 0,75 og en gjennomsnittlig varmeformbarhetsdybde på mellom 1/1,5 og 1/2 for en tykkelse på 0,7 - 1,3 mm - ved ekstrudering gjennom platedyse uten avkjøling ved utgangen av dysen. However, the patent applicant has discovered that, in the case of propylene and propylene-ethylene copolymers, it is possible to produce sheets with other properties than those previously described - e.g. a bulk density of from 0.65 to 0.75 and an average heat formability depth of between 1/1.5 and 1/2 for a thickness of 0.7 - 1.3 mm - when extruded through a sheet die without cooling at the exit of the die.
Disse arkene har dessuten de fordelaktige egenskaperThese sheets also have the advantageous properties
som karakteriserer ark av krystallinsk polypropylen, nemlig høy strekkfasthet, særlig i varm tilstand, og stor kjemisk treghet. which characterize sheets of crystalline polypropylene, namely high tensile strength, particularly in the hot state, and great chemical inertia.
Oppfinnelsen tar ellers sikte på å forbedre arkenes endelige egenskaper ytterligere, særlig når det gjelder å unngå The invention otherwise aims to further improve the final properties of the sheets, particularly when it comes to avoiding
de ulemper som kan forårsakes av polypropylenets krystallinske the disadvantages that can be caused by the polypropylene's crystalline
struktur, og da først og fremst dette at varmen kan få det til å smelte snarere enn til å mykne, noe som fører til meget lav viskositet i smeltet tilstand. structure, and then primarily this that the heat can cause it to melt rather than to soften, which leads to a very low viscosity in the molten state.
Det vesentlige ved foreliggende fremgangsmåte liggerThe essential thing about the present method lies
at man gjennom en platedyse ekstruderer polypropylen eller en kopolymer av propylen tilsatt et ekspansjonsmiddel og et kjernedannende stoff ved en temperatur som ligger i nærheten av, og som regel litt under, den som brukes ved ekstrudering av massive polypropylen under tilsvarende forhold. En fordelaktig variant gjør det mulig å motta det resulterende ark av lett polypropylen på kalandervalser med en innbyrdes valseaystand som er litt mindre enn arktykkelsen. that polypropylene or a copolymer of propylene added with an expansion agent and a nucleating substance is extruded through a plate nozzle at a temperature that is close to, and usually slightly below, that used when extruding solid polypropylene under similar conditions. An advantageous variant makes it possible to receive the resulting sheet of light polypropylene on calender rolls with a mutual roll distance that is slightly smaller than the sheet thickness.
Som ekspansjonsmiddel kan man med fordel bruke azodikarbonamid i mengder på 0,3-1% - helst rundt 0,5% - i vekt regnet på harpiksveksten.. Som kjernedannende tilsetning brukes fortrinnsvis talkmengder på 2-10%', helst 5-7,5%, i vekt regnet på harpiksvekten. As an expansion agent, azodicarbonamide can advantageously be used in amounts of 0.3-1% - preferably around 0.5% - by weight based on the resin growth. As a core-forming additive, talc amounts of 2-10%', preferably 5-7, 5%, by weight calculated on the resin weight.
De fysikalske egenskaper blir ifølge oppfinnelsen ytterligere forbedret ved tilsetting av en annen amorf eller krystallinsk termoplastisk polymer til blandingen som skal ekstruderes. According to the invention, the physical properties are further improved by adding another amorphous or crystalline thermoplastic polymer to the mixture to be extruded.
Som eksempel på en slik termoplastisk polymer kan nevnes polystyren og polyetylen. Examples of such a thermoplastic polymer include polystyrene and polyethylene.
Polystyren kan tilsettes i mengder på opp til 20%. Polystyrene can be added in amounts of up to 20%.
Nedenstående eksempler vil forklare oppfinnelsens rekkevidde og nytte. The examples below will explain the scope and usefulness of the invention.
Eksempel 1.Example 1.
Ekstrudering av massivt polypropylen.Extrusion of solid polypropylene.
Man bruker.en ekstruder av den type som i handelen kalles "Samafor BG 65" med skrue av type 112, som gir et kompresjonsforhold på 3,2. One uses an extruder of the type known in the trade as "Samafor BG 65" with a type 112 screw, which gives a compression ratio of 3.2.
- Skruens turtall: 65 omdr./min.- Screw speed: 65 rpm.
- Produksjon pr. time: 57 kg/h..- Production per hour: 57 kg/h..
- Massens temperatur ved innmatning: 195°C.- The temperature of the pulp when feeding: 195°C.
o o
- - - - sentrum I : 200 C.- - - - center I : 200 C.
- - - - II 205°C.- - - - II 205°C.
- - - utgangen : 2l0°C.- - - the output: 2l0°C.
- Hodets temperatur 225°C.- Head temperature 225°C.
-Dysens temperatur til venstre: 235°C.- Nozzle temperature on the left: 235°C.
- Kalandervalsenes temperatur: - The temperature of the calender rolls:
Under disse forhold får man et ark av blankt, polypropylen på 600 mm bredde, jevnt og uten blakkede soner. Under these conditions, you get a sheet of glossy, polypropylene 600 mm wide, even and without tarnished areas.
Eksempel 2.Example 2.
Ekstrudering av lette ark av polypropylen.Extrusion of light polypropylene sheets.
Man bruker en ekstruder av den type som i handelen kalles "Samafor BG 65" med skrue av type 112, som gir et kompresjonsforhold på 3,2. One uses an extruder of the type known in the trade as "Samafor BG 65" with screw type 112, which gives a compression ratio of 3.2.
Blandingsforhold: Mixing ratio:
Polypropylen : 100 vektdeler. Polypropylene: 100 parts by weight.
Azodikarbonamid (EPA fra Fisons): 1/2 vektdel Talk fraLuzenac: 5 vektdeler ("Steamic 0") Azodicarbonamide (EPA from Fisons): 1/2 part by weight Talc from Luzenac: 5 parts by weight ("Steamic 0")
Arbeidsmetode.Working method.
Man ekstruderer et flor av lett polypropylen med jevn tykkelse 1,20 mm og i 650 ram bredde, og med tilsynelatende'romvekt 0,53, ru på begge sider, ved å justere- dysemunningen. One extrudes a sheet of light polypropylene with a uniform thickness of 1.20 mm and a width of 650 ram, and with an apparent bulk density of 0.53, rough on both sides, by adjusting the nozzle mouth.
Når munningen er justert , justeres kalandervalsene til en innbyrdes avstand på 1,10 mm. cellestrukturen blir derved mer kompakt, og romvekten øker til 0,67. Minst én side er glatt og blank. Den er blitt glattet av mellemste kalandervalse idet arket legger seg rundt den. When the mouth is adjusted, the calender rolls are adjusted to a mutual distance of 1.10 mm. the cell structure thereby becomes more compact, and the specific gravity increases to 0.67. At least one side is smooth and shiny. It has been smoothed by the middle calender roll as the sheet settles around it.
Man får på denne måte et.ark med romvekt 0,67 for 1,07 mm tykkelse og med en gjennomsnittlig varmeformingsdybde som ligger mellom 1/1,5 og 1/2. In this way, a sheet is obtained with a density of 0.67 for 1.07 mm thickness and with an average heat forming depth of between 1/1.5 and 1/2.
Man kan bruke lavere eller høyere turtall på hen-holdsvis 42 og 90 omdr./min. og likevel oppnå ark av samme tetthet og med samme egenskaper. Derimot vil såvel høyere som lavere temperaturer føre til at arket får riss. Man har også fått riss under forsøk med kaldluftsblåsing fra et apparat som er identisk med det som beskrives i før nevnte fransk patent nr. 1 393 599. You can use a lower or higher speed of 42 and 90 rpm respectively. and still obtain sheets of the same density and with the same properties. In contrast, both higher and lower temperatures will cause the sheet to crack. Cracks have also been obtained during experiments with cold air blowing from a device which is identical to that described in the aforementioned French patent no. 1 393 599.
Under de samme betingelser har man ekstrudert en propylenetylen-kopolymer med et etyleninnhold på 8 vektprosent. Under the same conditions, a propylene-ethylene copolymer with an ethylene content of 8% by weight has been extruded.
Med en flortykkelse ved dysemunningen'på 0,8 - 1,4 mm, en tilsynelatende romvekt på 0,53 - 0,58, og en valseavstand på under en 1/10 av flortykkelsen, får man, ved å følge oppfinnelsen og den ovenfor beskrevne arbeidsmetode, ark av tykkelse 0,7 - 13 mm og med romvekt 0,65 - 0,75, som har en gjennomsnittlig varmeformingsdybde på mellom 1/ 1,5<p>g 1/2.. With a fleece thickness at the nozzle mouth of 0.8 - 1.4 mm, an apparent bulk density of 0.53 - 0.58, and a roll distance of less than 1/10 of the fleece thickness, one obtains, by following the invention and the above described working method, sheets of thickness 0.7 - 13 mm and with a bulk density of 0.65 - 0.75, which have an average heat forming depth of between 1/ 1.5<p>g 1/2..
Eksempel 3.Example 3.
Man bruker en ekstruder av den type som i handelen kalles "Samafor 75" med skrue av type 35d - ett - trinns - som gir. et kompresjonsforhold på 3,5 . One uses an extruder of the type known in the trade as "Samafor 75" with a screw of type 35d - one - step - as gear. a compression ratio of 3.5.
Blandingsforhold: Mixing ratio:
Propylen etylen-kopolymer med Q% etylen ("PR 156" Propylene ethylene copolymer with Q% ethylene ("PR 156"
fra CdF-Chimie): 100 vektdeler.from CdF-Chimie): 100 parts by weight.
(Strømningsindeks: 0,4 i f ingranulometriske perler). Azodikarbonamid ("EPA" fra Fisons) : 1/2 vektdel. (Flow index: 0.4 in f ingranulometric beads). Azodicarbonamide ("EPA" from Fisons): 1/2 part by weight.
Talk fra Luzenac: 7 1/2 .vektdeler ("Steamic 0")Talc from Luzenac: 7 1/2 parts by weight ("Steamic 0")
Ti02: 0,75 (Pulver<M>RL 21" fra Thann og Mulhouse) Ti02: 0.75 (Pulver<M>RL 21" from Thann and Mulhouse)
Arbeidsmetode.Working method.
Man ekstruderer et 625 mm bredt og 1,20 mm jevntykt flor av lett polypropylen med tilsynelatende romvekt 0,53, ru på begge sider, mens man justerer dysemunningen. One extrudes a 625 mm wide and 1.20 mm uniform thick sheet of lightweight polypropylene with an apparent bulk density of 0.53, roughened on both sides, while adjusting the nozzle mouth.
Når denne justering er utført , strammes kalandervalsene til innbyrdes avstand 1,10 mm. Cellestrukturen blir derved mer kompakt, og romvekten øker til 0,68. When this adjustment has been carried out, the calender rolls are tightened to a distance of 1.10 mm. The cell structure thereby becomes more compact, and the specific gravity increases to 0.68.
Den ene side er glatt og blank. Den er blitt glattet av midtre valse idet arket legger seg rundt den. One side is smooth and shiny. It has been smoothed by the middle roller as the sheet settles around it.
Man får på denne måte et 0,7 5 mm tykt ark med romvekt 0,68 og en gjennomsnittlig varmeformingsdybde på mellom 1/ 1,5 og 1/2. In this way, a 0.75 mm thick sheet is obtained with a bulk density of 0.68 and an average heat forming depth of between 1/1.5 and 1/2.
Strekkforsøk. Stretch test.
Bruddforlengelse i %, regnet i strekkretning:Elongation at break in %, calculated in the direction of tension:
Eksempel 4. Example 4.
Man bruker samme ekstruder og skrue som i eks. 1. You use the same extruder and screw as in ex. 1.
Blandingsforhold: Mixing ratio:
Propylen etylen-kopolymer med 8% etylen ("PR 156" fra CdF-Chimie):100 vektdeler. Propylene ethylene copolymer with 8% ethylene ("PR 156" from CdF-Chimie): 100 parts by weight.
Polystyren (homopolymer), strømingsindeks 8,5 ("PN 20" Polystyrene (homopolymer), flow index 8.5 ("PN 20"
fraCdF-Chimie, i form av perler-. 3 vektdeler.fromCdF-Chimie, in the form of beads-. 3 parts by weight.
Azodikarbonamid ("EPA" fra Fisons): 1/2 vektdel. Talk fra Luzenac: 7 1/2 vektdeler ("Steamic" 0). Ti02: 0,75 (pulver "RL 21" fra Thann og Mulhouse). Azodicarbonamide ("EPA" from Fisons): 1/2 part by weight. Talc from Luzenac: 7 1/2 parts by weight ("Steamic" 0). Ti02: 0.75 (powder "RL 21" from Thann and Mulhouse).
Arbeidsmetode:Working method:
Man går frem som i forrige eksempel og får et 0,73 mm tykt ark, med romvekt 0,67.Varmeformingsdybden blir som i nevnte eksempel. You proceed as in the previous example and get a 0.73 mm thick sheet, with a bulk density of 0.67. The heat forming depth is as in the aforementioned example.
Strekkf orsøk:,Tensile tests:,
Bruddforlengelse i % regnet i strekkretningen: Elongation at break in % calculated in the stretching direction:
Eksempel 5. Example 5.
Samme apparatur og temperaturforhold som i eks. 2. Same equipment and temperature conditions as in ex. 2.
Blandingsforhold^. Mixing ratio^.
<8>%-ig propylen etylen-kopolymer ("PR 156" fra cdF-chimie): <8>% propylene ethylene copolymer ("PR 156" from cdF-chimie):
100 vektdeler.100 parts by weight.
Polystyren (som i eks. 2) : 5 vektdeler. Azodikarbonamid:1/2 vektdel. Polystyrene (as in example 2): 5 parts by weight. Azodicarbonamide: 1/2 part by weight.
Talk fraLuzenac: 7 1/2 vektdel.Talc from Luzenac: 7 1/2 parts by weight.
Ti02: 0,75 Ti02: 0.75
Man får et 0,7 3 mm tykt ark med romvekt 0,70 og samme gjennomsnittlige varmeformingsdybde som i forrige eksempel. Eksempel 6. You get a 0.7 3 mm thick sheet with a bulk density of 0.70 and the same average heat forming depth as in the previous example. Example 6.
Man går frem som i forrige eksempel, men bruker 10 vektdeler av samme type polystyren og en produksjonshastighet på 52,5 kg/h. You proceed as in the previous example, but use 10 parts by weight of the same type of polystyrene and a production rate of 52.5 kg/h.
Man får et 0,73 mm tykt ark med romvekt 0,71 og samme gjennomsnittlige varmeformingsdybde som- i forrige eksempel. You get a 0.73 mm thick sheet with a bulk density of 0.71 and the same average heat forming depth as in the previous example.
Strekkforsøk: Tensile test:
Bruddforlengelse i 3 regnet i strekkretningen:Elongation at break in 3 calculated in the tensile direction:
- bredde: 20- width: 20
- lengde: 20-45.- length: 20-45.
Eksempel 7.Example 7.
Man går frem som i forrige eksempel, men bruker 15 vektdeler polystyren av samme type og øker produksjonen til 45 kg/h. Man . får et 0,7 3 mm tykt ark med romvekt 0,72. You proceed as in the previous example, but use 15 parts by weight of polystyrene of the same type and increase production to 45 kg/h. Mon. obtains a 0.7 3 mm thick sheet with a specific gravity of 0.72.
Strekkforsøk: Tensile test:
Bruddforlengelse i % regnet i strekkretningen:'Elongation at break in % calculated in the stretching direction:'
bredde:20width: 20
lengde : 20 - 25 length: 20 - 25
Eksempel 8.Example 8.
Man bruker samme ekstruder og skrue som i eks. 1. You use the same extruder and screw as in ex. 1.
Blandingsforhold: Mixing ratio:
Propylen' etylen-kopolymer:loo vektdeler.Propylene' ethylene copolymer: loo parts by weight.
Polyetylen av lav tetthet (strømningsindeks 0,5): 5 vektdeler Low density polyethylene (flow index 0.5): 5 parts by weight
("FB 5005" fra CdF-Chimie)("FB 5005" from CdF-Chimie)
Azodikarbonamid : 1/2 vektdel.Azodicarbonamide: 1/2 part by weight.
Talk fraLuzenac: 7 1/2 vektdeler.Talc from Luzenac: 7 1/2 parts by weight.
Ti02: 0,75. Ti02: 0.75.
Arbeidsmetode:Working method:
Man går frem som i eks. 1 og får et 0,73 mm tykt ark med romvekt 0,68. You proceed as in e.g. 1 and get a 0.73 mm thick sheet with a specific gravity of 0.68.
Eksempel 9.Example 9.
Man bruker samme ekstruder og skrue som i eks. 1. You use the same extruder and screw as in ex. 1.
Blandingsforhold -. Mixing ratio -.
Polypropylen ("PL 30" fra CdF-Chimie, strømningsindeks 0,4, i fingranulometriske perler): Polypropylene ("PL 30" from CdF-Chimie, flow index 0.4, in fine granulometric beads):
Homopolymert polystyren •. 3 vektdelerHomopolymeric polystyrene •. 3 parts by weight
Aziodikarbonamid:1/2 vektdelAziodicarbonamide: 1/2 part by weight
Talk fra Luzenac: 7 1/2 vektdelerTalc from Luzenac: 7 1/2 parts by weight
Ti02: 1,5 Ti02: 1.5
Arbeidsmetode:Working method:
Man går frem som i foregående eks. og får et 0,9 mm tykt ark med romvekt 0,67. You proceed as in the previous example. and get a 0.9 mm thick sheet with a specific gravity of 0.67.
Disse ark finner omfattende anvendelse, særlig som emballasje for matvarer i form av f.eks. små båtformede skåler. Man plaserer da selvfølgelig arkets ru side mot støpeformen. Det sier seg selv at- ovenstående beskrivelse er ment som en eksemplifisering og ikke som en avgrensning av oppfinnelsen, og at den kan- endres ved behov innenfor den ramme som angis i følgende patentkrav. These sheets find extensive use, particularly as packaging for food products in the form of e.g. small boat-shaped bowls. You then of course place the rough side of the sheet against the mould. It goes without saying that the above description is intended as an example and not as a limitation of the invention, and that it can be changed if necessary within the framework set out in the following patent claims.
Claims (1)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7523222A FR2318725A1 (en) | 1975-07-24 | 1975-07-24 | Expanded polypropylene sheet for thermoforming - by extruding a compsn. contg. polypropylene, blowing agent and nucleating agent through a sheet die |
| FR7610740A FR2348039A2 (en) | 1976-04-12 | 1976-04-12 | Expanded polypropylene sheet for thermoforming - by extruding a compsn. contg. polypropylene, blowing agent and nucleating agent through a sheet die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| NO762577L true NO762577L (en) | 1977-01-25 |
Family
ID=26218997
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO762577A NO762577L (en) | 1975-07-24 | 1976-07-23 |
Country Status (10)
| Country | Link |
|---|---|
| BR (1) | BR7604748A (en) |
| DE (1) | DE2633307A1 (en) |
| DK (1) | DK335376A (en) |
| ES (1) | ES450072A1 (en) |
| FI (1) | FI762121A (en) |
| IT (1) | IT1064130B (en) |
| LU (1) | LU75415A1 (en) |
| NL (1) | NL7608100A (en) |
| NO (1) | NO762577L (en) |
| PT (1) | PT65356B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0725916B2 (en) * | 1987-04-13 | 1995-03-22 | 三菱油化株式会社 | Method for producing polypropylene foam |
| US5116881A (en) * | 1990-03-14 | 1992-05-26 | James River Corporation Of Virginia | Polypropylene foam sheets |
-
1976
- 1976-07-12 PT PT65356A patent/PT65356B/en unknown
- 1976-07-16 IT IT50483/76A patent/IT1064130B/en active
- 1976-07-19 LU LU75415A patent/LU75415A1/xx unknown
- 1976-07-21 BR BR7604748A patent/BR7604748A/en unknown
- 1976-07-22 NL NL7608100A patent/NL7608100A/en not_active Application Discontinuation
- 1976-07-23 NO NO762577A patent/NO762577L/no unknown
- 1976-07-23 DK DK335376A patent/DK335376A/en unknown
- 1976-07-23 FI FI762121A patent/FI762121A/fi not_active Application Discontinuation
- 1976-07-23 ES ES450072A patent/ES450072A1/en not_active Expired
- 1976-07-23 DE DE19762633307 patent/DE2633307A1/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE2633307A1 (en) | 1977-02-10 |
| ES450072A1 (en) | 1977-07-16 |
| LU75415A1 (en) | 1977-04-06 |
| IT1064130B (en) | 1985-02-18 |
| NL7608100A (en) | 1977-01-26 |
| PT65356B (en) | 1978-01-09 |
| FI762121A (en) | 1977-01-25 |
| BR7604748A (en) | 1977-08-02 |
| PT65356A (en) | 1976-08-01 |
| DK335376A (en) | 1977-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0614748B1 (en) | Method for producing thermoplastic resin sheet or film | |
| US5439628A (en) | Method for manufacturing polypropylene film and sheet | |
| EP0765900B1 (en) | Method of producing a microporous polyolefin membrane | |
| CA2012729C (en) | Dulled stretched molding and process for producing the same | |
| JP3314358B2 (en) | Polystyrene foam and method for producing the same | |
| CN101537913A (en) | Packaging film for two-way stretch polypropylene low temperature self-constriction cigarette and production method thereof | |
| CA2491566A1 (en) | Resin compositions for producing biaxially oriented polypropylene films | |
| JP2001500534A (en) | Thermoformable foam sheet for producing open containers | |
| US6703439B2 (en) | Polyolefin resin composition and polyolefin film prepared from the same | |
| US20130041124A1 (en) | Polymer article and method for producing polymer article | |
| CN110303748B (en) | Thinner polyolefin shrink film and production process thereof | |
| CN113895126A (en) | High-shrinkage biaxially-oriented polylactic acid film and preparation method thereof | |
| US3629387A (en) | Process for producing improved impactresistant polystyrene films | |
| NO762577L (en) | ||
| JPS6030537B2 (en) | Manufacturing method for containers, etc. | |
| US6572806B1 (en) | Multilayered biaxially-oriented styrene based resin sheet and method for production thereof | |
| JPS6216171B2 (en) | ||
| JPH0380092B2 (en) | ||
| US20100081756A1 (en) | Random copolymer with enhanced ethylene content | |
| JPH08419B2 (en) | Method for producing polypropylene resin sheets | |
| JPH0592470A (en) | Manufacture of polypropylene sheet excellent in transparency | |
| JP4260978B2 (en) | Polypropylene resin composition for stretched film | |
| JP3501562B2 (en) | Propylene-ethylene random copolymer composition for biaxially stretched film and biaxially stretched film using the same | |
| JPS59187817A (en) | Thermoforming polypropylene resin sheet | |
| JPS6141732B2 (en) |