CN1227157A - Method for producing plastic - Google Patents
Method for producing plastic Download PDFInfo
- Publication number
- CN1227157A CN1227157A CN 98110996 CN98110996A CN1227157A CN 1227157 A CN1227157 A CN 1227157A CN 98110996 CN98110996 CN 98110996 CN 98110996 A CN98110996 A CN 98110996A CN 1227157 A CN1227157 A CN 1227157A
- Authority
- CN
- China
- Prior art keywords
- plastics
- stearate
- raw materials
- cadmium
- temperature
- 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.)
- Pending
Links
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
Abstract
The present invention relates to the production of polyolefine plastics. The production process includes the steps of adding stearic acid 400g, barium stearate 600 g and lead stearate 600g through stirring for 30 min; adding further sulfur liquid 800 g, EVA (vinyl acetate) granules 100 kg and, liquid asphalt 200g through stirring for 20 min; and adding further cadmium powder 500g, coupling agent 500g, foaming agent 3kg and zinc stearate 800g through stirring for 20 min. All the stirrings are performed in a mixer with temperature maintained at 170-180 deg.c. The plastics thus produced features features one step foaming.
Description
The present invention addresses a kind of preparation method for plastics, in more detail, is a kind of manufacture method of polyolefin plastics, and these plastics only produce the one step foaming effect when making finished product with injection moulding, can not produce the second time of foaming phenomenon.
Generally manufacture object with plastics, its manufacture process is that plastic raw materials is poured in the pay-off of high temperature (170～180 ℃), add thermal agitation then and form thick plastics, cooperate injection device that dense thick plastics are injected mould by pay-off, and this mould must keep suitable high temperature, make the plastics expansion molding under predetermined temperature in it in mould, will take out goods, wait for that it cools off hard moulding admittedly naturally through shirking mould behind the appropriate time.
But the object made from the plastics of commonly using, after the demoulding, higher temperature is arranged owing to object itself still has heat, and lose mould and surround resistance pressure, can produce the second time of foaming phenomenon, when therefore operating, for fear of the second time of foaming phenomenon, often with the reduction of die size size, make the demoulding the more former object undersized of object some, treat that its second time of foaming effect can expand into predetermined size period.But the process that obtains the preliminary dimension shaped article because of the effect of wait second time of foaming is very time-consuming, and resist pressure owing to lack the encirclement of mould during second time of foaming, be not easy to control fully the foaming shape of object, expand disadvantages such as inequality, object distortion easily, so how to change plastics essence, make it that second time of foaming effect not take place, this is the problem that needs solution.
The purpose of this invention is to provide a kind of preparation method for plastics, when the prepared plastics of this method are made object in injection moulding, only produce the one step foaming effect, can not produce the second time of foaming phenomenon.
The present invention achieves the above object by following implementer's case.
The present invention is a kind of manufacture method of polyolefin plastics, the raw material that these plastics adopted and fill a prescription as follows:
100 kilograms of EVA pellets (vinyl acetate)
Stearic acid 400 grams
Barium stearate 600 grams
Lead stearate 600 grams
Sulphur liquid (sulfur dioxide) 800 grams
Liquid asphalt 200 grams
Powdery cadmium (cadmium stearate) 500 grams
Coupling agent (cumyl peroxide) 500 grams
3 kilograms of blowing agents
Zinc stearate 800 grams
Above-mentioned each raw material is converted into percentage:
EVA pellet (vinyl acetate) 93.11%
Stearic acid 0.37%
Barium stearate 0.56%
Lead stearate 0.56%
Sulphur liquid (sulfur dioxide) 0.74%
Liquid asphalt 0.19%
Powdery cadmium (cadmium stearate) 0.47%
Coupling agent (cumyl peroxide) 0.47%
Blowing agent 2.79%
Zinc stearate 0.74%
Above-mentioned liquid asphalt is petrochemicals, and it has the characteristic of wear-resisting, anti-pulling force;
The powdery cadmium is the stabilization agent of injection molded article;
Sulphur liquid plays the stabilization agent effect in the present invention, and the control of unlikely because temperature has elementary errors promptly to produce to burn or bad variation such as hardening slightly in whole manufacturing process.
Coupling agent has the R-O-O-R chemical constitution and is the most stable peroxide, is applicable to various types of olefins polymer and copolymer, as polyethylene, ethylene vinyl acetate copolymer, ethylene, propylene trimer, synthetic rubber, natural rubber etc.The purpose that the present invention adds coupling agent is in the end finalized the design the chemical constitution of raw material composition in the manufacture process, is avoided producing the variation that can not expect.
Plastic manufacturing process step of the present invention is as follows:
One, will stearic acid 400 grams, barium stearate 600 grams, lead stearate 600 each raw material of gram add in mixer and stirred 30 minutes, temperature maintenance is 170～180 ℃ scope in the mixer;
Two, add raw materials such as sulphur liquid 800 grams, 100 kilograms of EVA pellets (vinyl acetate), liquid asphalt 200 grams again, stirred again 20 minutes, stir built-in temperature and still maintain 170～180 ℃ of scopes.
Three, add powder cadmium 500 grams, coupling agent 500 grams, 3 kilograms of blowing agents, zinc stearate 800 grams again, stirred 20 minutes again, the mixer temperature still maintains 170～180 ℃ scope.
The polyolefin plastics that the inventive method makes when with it being raw material employing injection moulding manufactured goods, only produces the one step foaming effect, can not produce the second time of foaming phenomenon.
The thick plastics that make via above-mentioned steps, with its collection and treat its cool off naturally make it become hard plastics admittedly after, should consolidate plastics firmly with guillotine and be cut into strip, send into again in the pulverizer and it to be ground into granular plastics.
With the present invention's particle shape plastic production plastic article, its great advantage is must can not consolidate moulding firmly through second time of foaming after the object demoulding, and in other words, plastics only can produce the one step foaming phenomenon in mould, therefore do not shorten molding time.In addition, be exactly that plastic article after the demoulding is promptly finalized the design without the advantage of second time of foaming, do not have the phenomenon that reexpands, can control object type body really, the object of commonly using second time of foaming is problems such as distortion or other defect not more.
Now trial stretch and the most preferred embodiment of being done is illustrated in down:
Once composition of raw materials was tested in following prescribed limit, its result purpose all according to the invention and requirement are now listed in the back: (percentage is all represented it with percentage by weight)
EVA pellet (vinyl acetate) (99101 kilograms) 92.18-94.04%
Stearic acid (300-500 gram) 0.28-0.47%
Barium stearate (450-750 gram) 0.42-0.70%
Lead stearate (500-700 gram) 0.47-0.65%
Sulphur liquid (600-1000 gram) 0.56-0.93%
Liquid asphalt (150-250 gram) 0.14-0.23%
Powdery cadmium (400-600 gram) 0.37-0.56%
Coupling agent (350-650 gram) 0.33-0.61%
Blowing agent (1-4 kilogram) 0.93-3.72%
Zinc stearate (400-1000 gram) 0.37-0.93%
Its manufacturing step is as follows:
One, will stir 28-32 minute in raw materials such as stearic acid 0.28-0.47%, barium stearate 0.42-0.70%, the lead stearate 0.47-0.65% adding mixer, temperature maintenance is at 170-180 ℃ in the mixer;
Two, add sulphur liquid 0.56-0.93% again, raw materials such as EVA pellet (vinyl acetate) 92.18-94.04%, liquid asphalt 0.14-0.23% stirred 18-22 minute again, stir built-in temperature and still maintain 170-180 ℃;
Three, add powder cadmium 0.37-0.56%, coupling agent 0.33-0.61%, blowing agent 0.93-3.72%, zinc stearate 0.37-0.93% again, stirred again 18-22 minute, stir built-in temperature and still maintain 170-180 ℃.
Make thick plastics by above step, with its collection and treat its cool off naturally make it become hard plastics admittedly after, should consolidate plastics firmly with guillotine and be cut into strip, send into again in the pulverizer and it to be ground into particle shape plastics.
Now the best experimental example with the present invention is described in down:
The composition of raw materials of most preferred embodiment and corresponding percentage composition (percentage is represented with percentage by weight) thereof are listed in following:
100 kilogram 93.11% of EVA pellet (vinyl acetate)
Stearic acid 400 grams 0.37%
Barium stearate 600 grams 0.56%
Lead stearate 600 grams 0.56%
Sulphur liquid (sulfur dioxide) 800 grams 0.74%
Liquid asphalt 200 grams 0.19%
Powdery cadmium 500 grams 0.47%
Coupling agent (cumyl peroxide) 500 grams 0.47%
3 kilogram 2.79% of blowing agent
Zinc stearate 800 grams 0.74%
Its manufacturing step is as follows:
One, prize stearic acid 400 grams (0.37%), barium stearate 600 grams (0.56%) stirred 30 minutes in lead stearate 600 gram raw materials such as (O.56%) the adding mixers, and temperature maintenance is at 170-180 ℃ in the mixer;
Two, add sulphur liquid 800 gram (0.74%) again, EVA (vinyl acetate) pellet 100 kilograms of (93.1l%), liquid asphalts 200 gram (0.19%) raw materials of etc.ing stirred 20 minutes again, the stirring built-in temperature still maintains 170-180 ℃;
Three, add powder cadmium 500 grams (O.47%), coupling agent 500 grams (0.47%), blowing agent 3 kilograms of (2.79%), zinc stearate 800 gram raw materials such as (O.74%) again.Stirred again 20 minutes, and stirred built-in temperature and still maintain 170-180 ℃.
Make thick plastics by above-mentioned steps, with its collection and treat its cool off naturally make it become hard plastics admittedly after, should consolidate plastics firmly with guillotine and be cut into strip, send into again in the pulverizer and it to be ground into particle shape plastics.
The prepared plastics of the inventive method are through Shoes Design ﹠ Technology Research Centre's technical testing, and the result is as shown in the table for its test report:
| Pilot project | The result | Method and condition |
| Specific gravity test | ????0.56 | ?CNS5341 |
| Bending and unbending test at the bottom of the finished product | Sole does not chap | Tortuous angle: an angle of 90 degrees temperature: 23 ± 2 ℃ of number of times: 40000 times |
| Test for tensile strength (Kg/cm 2) | ????46.11 | CNS3553, No. 2 shape test pieces 50mm/ minute |
| Elongation test (%) | ????347.0 | CNS3553, No. 2 shape test pieces 500mm/ minute |
| Tear strength test (Kg/cm) | ????30.23 | CNS3559, B shape test piece 500mm/ minute |
| AKRON abrasion test (C.C) | ????0.06 | Change 21b * 2000,15 ° of angles |
Claims (2)
1, a kind of preparation method for plastics, it is characterized in that: composition of raw materials that this method is used and content (percentage by weight) are: EBA (vinyl acetate) pellet 92.18-94.04%, stearic acid 0.28-0.47%, barium stearate 0.42-0.70%, lead stearate 0.47-0.65%, sulphur liquid 0.56-0.93%, liquid asphalt 0.14-0.23%, powdery cadmium (cadmium stearate) 0.37-0.56%, coupling agent-(cumyl peroxide) 0.33-0.61%, blowing agent 0.93-3.72%, zinc stearate 0.37-0.93%; Its manufacturing step is: (one) earlier adds raw materials such as stearic acid, barium stearate, lead stearate and stirs in 28-32 minute, mixer temperature maintenance in the mixer at 170-180 ℃; (2) add raw materials such as sulphur liquid, EVA (vinyl acetate) pellet, liquid asphalt again and stirred again 18-22 minute, stir built-in temperature and still maintain 170-180 ℃; (3) add powder cadmium, coupling agent, blowing agent, zinc stearate again, stir the 18-22 branch again, stir built-in temperature and still maintain 170-180 ℃; Make thick plastics by above-mentioned steps, should be thick plastics collect and treat its cool off naturally make its become consolidate plastics firmly after, be cut into strip with guillotine, send into again in the pulverizer and it to be ground into broken shape plastics.
2, a kind of preparation method for plastics as claimed in claim 1, it is characterized in that: composition of raw materials that it is best and content (percentage by weight) are EVA (vinyl acetate) pellet 93.11%, stearic acid 0.37%, barium stearate 0.56%, lead stearate 0.56%, sulphur liquid 0.74%, liquid asphalt 0.19%, powdery cadmium (cadmium stearate) 0.47%, coupling agent (cumyl peroxide) 0.47%, blowing agent 2.79%, zinc stearate 0.74%; Its manufacturing step is: (one) adds mixer with raw materials such as stearic acid, barium stearate, lead stearates earlier and stirred 30 minutes, and temperature maintenance is at 170-180 ℃ in the mixer; (2) add raw materials such as sulphur liquid, EVA (vinyl acetate) pellet, liquid asphalt again, stirred again 20 minutes, stir built-in temperature and still maintain 170-180 ℃; (3) add powder cadmium, coupling agent, blowing agent, zinc stearate again, stirred again 20 minutes, stir built-in temperature and still maintain 170-180 ℃; Make thick plastics by above-mentioned steps, should be thick plastics collect and treat its cool off naturally make its become consolidate plastics firmly after, be cut into strip with guillotine, send into again in the pulverizer and it to be ground into particle shape plastics.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110996 CN1227157A (en) | 1998-08-07 | 1998-08-07 | Method for producing plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98110996 CN1227157A (en) | 1998-08-07 | 1998-08-07 | Method for producing plastic |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1227157A true CN1227157A (en) | 1999-09-01 |
Family
ID=5221008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98110996 Pending CN1227157A (en) | 1998-08-07 | 1998-08-07 | Method for producing plastic |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1227157A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322038C (en) * | 2001-10-25 | 2007-06-20 | 欧文斯科尔宁格公司 | Asphalt-filled polymer foams |
-
1998
- 1998-08-07 CN CN 98110996 patent/CN1227157A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1322038C (en) * | 2001-10-25 | 2007-06-20 | 欧文斯科尔宁格公司 | Asphalt-filled polymer foams |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109135033A (en) | High molecular material physical foaming method and foaming product | |
| CN101962455B (en) | Injection microcellular foamed wood-plastic composite material and preparation method thereof | |
| US20160038792A1 (en) | Method of forming a cured elastomer and golf balls | |
| CN102040774B (en) | PP (polypropylene) filled masterbatch and method for preparing same | |
| CN1948384A (en) | Wood plastic micro foaming composite material and its processing shaping method | |
| CN102558643A (en) | Inorganic powder filled modified PE (polythene) master batch and preparation method thereof | |
| CN1039820A (en) | High-melt-flow fiber-reinforced polypropylene compositions | |
| CN102643480A (en) | Anti-static alloy composite material and preparation method thereof | |
| CN110157086A (en) | A kind of physical foaming method forming foamed products directly in mould | |
| CN106519556A (en) | Grafted modified polypropylene wood-plastic composite material and preparation method thereof | |
| CN114989581B (en) | Biodegradable polylactic acid foaming particle and preparation method thereof | |
| CN111234384A (en) | Preparation method of high-toughness PP (polypropylene) particles | |
| CN106700570A (en) | TPV material and preparation method and application thereof | |
| CN109485984A (en) | A kind of foaming method of Polymer Physics foamed material | |
| CN1039254A (en) | High-elastic rubber products gutta percha | |
| CN113150566B (en) | High-melt-index high-modulus asphalt mixture additive and preparation method and application thereof | |
| CN1775851A (en) | High Melt strength polypropylene resin and its preparing method | |
| CN1227157A (en) | Method for producing plastic | |
| CN105218938A (en) | A kind of high jump pad EVA matrix material and preparation method thereof | |
| CN109627539A (en) | Polyethylene composition and preparation method thereof with excellent resistance to cracking energy | |
| CN111704755A (en) | Preparation method of rubber foam material with bubble inner wall shell | |
| CN106566164A (en) | Toughening filler master batch and preparation method thereof | |
| CN101067014A (en) | Process of grafting maleic anhydride with vinyl methacrylate | |
| CN107901531A (en) | A kind of three layers of Wood-plastic floor and preparation method thereof | |
| CN114031907A (en) | Puncture-resistant PBAT composite film and preparation method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |