CN104292822A - Impact-resistant plastic and preparation method thereof - Google Patents
Impact-resistant plastic and preparation method thereof Download PDFInfo
- Publication number
- CN104292822A CN104292822A CN201410504516.XA CN201410504516A CN104292822A CN 104292822 A CN104292822 A CN 104292822A CN 201410504516 A CN201410504516 A CN 201410504516A CN 104292822 A CN104292822 A CN 104292822A
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- nylon
- impact resistance
- resistance plastics
- toughner
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Abstract
The invention discloses impact-resistant plastic and a preparation method thereof. The plastic consists of the following components in parts by mass: 38-50 parts of nylon 6, 27-42 parts of nylon 12, 14-26 parts of calcium stearate, 2-15 parts of a toughening agent, 1-12 parts of a dispersing agent, 2-17 parts of polyethylene resin, 5-18 parts of ethylene-propylene-diene-terpolymer rubber and 2-12 parts of talcum powder. The preparation method comprises the following steps: mixing the nylon 6, the nylon 12, calcium stearate, the toughening agent, the polyethylene resin, the ethylene-propylene-diene-terpolymer rubber and the talcum powder in a material mixing machine to obtain a main material; adding the dispersing agent into the main material, and mixing; then conveying to a blow molding machine material storage barrel, and plasticizing in a screw rod; and then entering a mold head through a pressure bin, blowing into a mold through the mold head, opening the mold, and taking out a mixture to obtain an impact-resistant plastic product which is consistent with the mold. The impact-resistant plastic disclosed by the invention has the advantages of good impact resistance and low production cost.
Description
Technical field
The present invention relates to a kind of plastics and preparation method thereof, particularly a kind of impact resistance plastics and preparation method thereof.
Background technology
Automobile is the main flexible transport facility in land, and automotive industry is one of basic industry very important in national economy.Along with a large amount of productions of automobile, thereby produce how energy-conservation fuel-efficient, improve function, economize on material, simplify production process and the problem such as to reduce costs.
Plasticization of Automobile is trend of the times, and it is based on three main reasons: one is energy-conservation; Two is improve function; Three is simplify manufacturing process and technique.
Weight and the conversion reduced costs from metallic substance to Plastic Resin in recent years in order to alleviate automobile have caused the broad interest of investigator.
Application number be 201110456427.9 Chinese patent disclose a kind of polyamide compoiste material and its preparation method and application, be made up of polymeric amide, polyolefine, elastomerics, solubilizing agent and modifier, the goods shock resistance that this matrix material is made is poor.Application number be 200410099075.6 Chinese patent disclose a kind of nylon fuel oil tank and preparation method thereof being applied to automobile, motorcycle, this fuel tank component is more, and preparation method is complicated, is unfavorable for cost-saving.
Summary of the invention
In order to overcome above the deficiencies in the prior art, the invention provides a kind of impact resistance plastics and preparation method thereof, plastics can be made to have shock resistance good, the advantage that production cost is low.
The technical solution used in the present invention is: a kind of impact resistance plastics, be made up of each component of following mass parts: nylon 6 38-50 part, nylon 12 27-42 part, calcium stearate 14-26 part, toughner 2-15 part, dispersion agent 1-12 part, polyvinyl resin 2-17 part, terpolymer EP rubber 5-18 part, talcum powder 2-12 part.
Preferably, a kind of impact resistance plastics, is made up of each component of following mass parts: nylon 6 42-48 part, nylon 12 29-40 part, calcium stearate 17-21 part, toughner 5-13 part, dispersion agent 3-10 part, polyvinyl resin 4-14 part, terpolymer EP rubber 8-12 part, talcum powder 4-9 part.
Preferred, a kind of impact resistance plastics, is made up of each component of following mass parts: nylon 6 46 parts, nylon 12 32 parts, calcium stearate 19 parts, toughner 8 parts, dispersion agent 6 parts, polyvinyl resin 11 parts, terpolymer EP rubber 10 parts, talcum powder 7 parts.
Above-mentioned toughner is grafting maleic anhydride with ethylene propylene terpolymer.
Above-mentioned dispersion agent is fatty acid polyglycol ester.
A kind of impact resistance plastics preparation method, comprises the following steps:
(1) add in mixer by nylon 6, nylon 12, calcium stearate, toughner, polyvinyl resin, terpolymer EP rubber and talcum powder, mixing time is 12-18min, and stir speed (S.S.) is 1300-1500r/min, obtains major ingredient;
(2) in step (1) gained major ingredient, add dispersion agent, mixing time is 5-8min, and stir speed (S.S.) is 700-900r/min, obtains mixture;
(3) step (2) gained mixture is sent in blow moulding machine storage vat, enter screw rod and carry out plastifying the fluid chemical field material obtaining this impact resistance plastics;
(4) step (3) gained fluid chemical field material is entered die head through Pressure chamber, blow into mould through die head, 3-6min die sinking is taken out, and obtains the impact resistance plastics goods consistent with mould.
In above-mentioned steps (3), spiro rod length and diameter are than being 26:1.
In above-mentioned steps (4), the pressure of Pressure chamber is 40-45PN.
Beneficial effect: in the present invention, dispersion agent makes each component better to merge, and improves the consistency of nylon 6, nylon66 fiber and polyvinyl resin, toughner and talcous use, make shock resistance be significantly improved simultaneously.
The plastics that the present invention obtains are while cost-saving, and tensile strength reaches 88-92MPa, and flexural strength reaches 138-145MPa, and notch shock is at 127-133Kj/M
2between.Not only increase tensile strength and flexural strength, substantially increase notched Izod impact strength simultaneously, there is excellent shock resistance.
Embodiment
Embodiment 1
A kind of impact resistance plastics, is made up of each component of following mass parts: nylon 6 38 parts, nylon 12 27 parts, calcium stearate 14 parts, toughner 2 parts, dispersion agent 1 part, polyvinyl resin 2 parts, terpolymer EP rubber 5 parts, talcum powder 2 parts.
Preparation method:
(1) add in mixer by nylon 6, nylon 12, calcium stearate, toughner, polyvinyl resin, terpolymer EP rubber and talcum powder, mixing time is 12min, and stir speed (S.S.) is 1300r/min, obtains major ingredient;
(2) in step (1) gained major ingredient, add dispersion agent, mixing time is 5min, and stir speed (S.S.) is 700r/min, obtains mixture;
(3) sent in blow moulding machine storage vat by step (2) gained mixture, enter screw rod and plastify, spiro rod length and diameter, than being 26:1, obtain the fluid chemical field material of this impact resistance plastics;
(4) step (3) gained fluid chemical field material is entered die head through the Pressure chamber of 40PN, blow into mould through die head, 3min die sinking is taken out, and obtains the impact resistance plastics goods consistent with mould.
Embodiment 2
A kind of impact resistance plastics, is made up of each component of following mass parts: nylon 6 50 parts, nylon 12 42 parts, calcium stearate 26 parts, toughner 15 parts, dispersion agent 12 parts, polyvinyl resin 17 parts, terpolymer EP rubber 18 parts, talcum powder 12 parts.
Preparation method:
(1) add in mixer by nylon 6, nylon 12, calcium stearate, toughner, polyvinyl resin, terpolymer EP rubber and talcum powder, mixing time is 18min, and stir speed (S.S.) is 1500r/min, obtains major ingredient;
(2) in step (1) gained major ingredient, add dispersion agent, mixing time is 8min, and stir speed (S.S.) is 900r/min, obtains mixture;
(3) sent in blow moulding machine storage vat by step (2) gained mixture, enter screw rod and plastify, spiro rod length and diameter, than being 26:1, obtain the fluid chemical field material of this impact resistance plastics;
(4) step (3) gained fluid chemical field material is entered die head through the Pressure chamber of 45PN, blow into mould through die head, 6min die sinking is taken out, and obtains the impact resistance plastics goods consistent with mould.
Embodiment 3
A kind of impact resistance plastics, is made up of each component of following mass parts: nylon 6 42 parts, nylon 12 29 parts, calcium stearate 17 parts, toughner 5 parts, dispersion agent 3 parts, polyvinyl resin 4 parts, terpolymer EP rubber 8 parts, talcum powder 4 parts.
Preparation method:
(1) add in mixer by nylon 6, nylon 12, calcium stearate, toughner, polyvinyl resin, terpolymer EP rubber and talcum powder, mixing time is 13min, and stir speed (S.S.) is 1350r/min, obtains major ingredient;
(2) in step (1) gained major ingredient, add dispersion agent, mixing time is 6min, and stir speed (S.S.) is 750r/min, obtains mixture;
(3) sent in blow moulding machine storage vat by step (2) gained mixture, enter screw rod and plastify, spiro rod length and diameter, than being 26:1, obtain the fluid chemical field material of this impact resistance plastics;
(4) step (3) gained fluid chemical field material is entered die head through the Pressure chamber of 41PN, blow into mould through die head, 3min die sinking is taken out, and obtains the impact resistance plastics goods consistent with mould.
Embodiment 4
A kind of impact resistance plastics, is made up of each component of following mass parts: nylon 6 48 parts, nylon 12 40 parts, calcium stearate 21 parts, toughner 13 parts, dispersion agent 10 parts, polyvinyl resin 14 parts, terpolymer EP rubber 12 parts, talcum powder 9 parts.
Preparation method:
(1) add in mixer by nylon 6, nylon 12, calcium stearate, toughner, polyvinyl resin, terpolymer EP rubber and talcum powder, mixing time is 14min, and stir speed (S.S.) is 1450r/min, obtains major ingredient;
(2) in step (1) gained major ingredient, add dispersion agent, mixing time is 7min, and stir speed (S.S.) is 850r/min, obtains mixture;
(3) sent in blow moulding machine storage vat by step (2) gained mixture, enter screw rod and plastify, spiro rod length and diameter, than being 26:1, obtain the fluid chemical field material of this impact resistance plastics;
(4) step (3) gained fluid chemical field material is entered die head through the Pressure chamber of 44PN, blow into mould through die head, goods are taken out in 5min die sinking, obtain the impact resistance plastics goods consistent with mould.
Embodiment 5
A kind of impact resistance plastics, is made up of each component of following mass parts: nylon 6 46 parts, nylon 12 32 parts, calcium stearate 19 parts, toughner 8 parts, dispersion agent 6 parts, polyvinyl resin 11 parts, terpolymer EP rubber 10 parts, talcum powder 7 parts.
Preparation method:
(1) add in mixer by nylon 6, nylon 12, calcium stearate, toughner, polyvinyl resin, terpolymer EP rubber and talcum powder, mixing time is 16min, and stir speed (S.S.) is 1400r/min, obtains major ingredient;
(2) in step (1) gained major ingredient, add dispersion agent, mixing time is 6min, and stir speed (S.S.) is 800r/min, obtains mixture;
(3) sent in blow moulding machine storage vat by step (2) gained mixture, enter screw rod and plastify, spiro rod length and diameter, than being 26:1, obtain the fluid chemical field material of this impact resistance plastics;
(4) step (3) gained fluid chemical field material is entered die head through the Pressure chamber of 43PN, blow into mould through die head, 4min die sinking is taken out, and obtains the impact resistance plastics goods consistent with mould.
Performance test:
By the plastics of embodiment 1-5 gained to its performance test results as following table:
As can be seen from the above table: the plastics that the present invention obtains are while cost-saving, and tensile strength reaches 88-92MPa, and flexural strength reaches 138-145MPa, and notch shock is at 127-133Kj/M
2between.Not only increase tensile strength and flexural strength, substantially increase notched Izod impact strength simultaneously, there is excellent shock resistance.
Claims (8)
1. an impact resistance plastics, is characterized in that, is made up of the component of following mass parts: nylon 6 38-50 part, nylon 12 27-42 part, calcium stearate 14-26 part, toughner 2-15 part, dispersion agent 1-12 part, polyvinyl resin 2-17 part, terpolymer EP rubber 5-18 part, talcum powder 2-12 part.
2. a kind of impact resistance plastics according to claim 1, it is characterized in that, be made up of the component of following mass parts: nylon 6 42-48 part, nylon 12 29-40 part, calcium stearate 17-21 part, toughner 5-13 part, dispersion agent 3-10 part, polyvinyl resin 4-14 part, terpolymer EP rubber 8-12 part, talcum powder 4-9 part.
3. a kind of impact resistance plastics according to claim 1, is characterized in that, is made up of the component of following mass parts: nylon 6 46 parts, nylon 12 32 parts, calcium stearate 19 parts, toughner 8 parts, dispersion agent 6 parts, polyvinyl resin 11 parts, terpolymer EP rubber 10 parts, talcum powder 7 parts.
4. a kind of impact resistance plastics according to claim 1, is characterized in that toughner is grafting maleic anhydride with ethylene propylene terpolymer.
5. a kind of impact resistance plastics according to claim 1, is characterized in that dispersion agent is fatty acid polyglycol ester.
6. the preparation method of a kind of impact resistance plastics of claim 1 to 5 described in any one, is characterized in that: comprise the following steps:
(1) add in mixer by nylon 6, nylon 12, calcium stearate, toughner, polyvinyl resin, terpolymer EP rubber and talcum powder, mixing time is 12-18min, and stir speed (S.S.) is 1300-1500r/min, obtains major ingredient;
(2) in step (1) gained major ingredient, add dispersion agent, mixing time is 5-8min, and stir speed (S.S.) is 700-900r/min, obtains mixture;
(3) step (2) gained mixture is sent in blow moulding machine storage vat, enter screw rod and carry out plastifying the fluid chemical field material obtaining this impact resistance plastics;
(4) step (3) gained fluid chemical field material is entered die head through Pressure chamber, blow into mould through die head, 3-6min die sinking is taken out, and obtains the impact resistance plastics goods consistent with mould.
7. the preparation method of a kind of impact resistance plastics according to claim 6, is characterized in that: in described step (3), spiro rod length and diameter are than being 26:1.
8. the preparation method of a kind of impact resistance plastics according to claim 6, is characterized in that: in described step (4), the pressure of Pressure chamber is 40-45PN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410504516.XA CN104292822A (en) | 2014-09-26 | 2014-09-26 | Impact-resistant plastic and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410504516.XA CN104292822A (en) | 2014-09-26 | 2014-09-26 | Impact-resistant plastic and preparation method thereof |
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| Publication Number | Publication Date |
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| CN104292822A true CN104292822A (en) | 2015-01-21 |
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| CN201410504516.XA Withdrawn CN104292822A (en) | 2014-09-26 | 2014-09-26 | Impact-resistant plastic and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106147212A (en) * | 2015-04-01 | 2016-11-23 | 合肥杰事杰新材料股份有限公司 | A kind of PA6 compositions and preparation method thereof |
| CN109049874A (en) * | 2018-08-14 | 2018-12-21 | 太仓金凯特新材料科技有限公司 | A kind of high performance antioxidation novel polyethylene plastics |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007123975A2 (en) * | 2006-04-20 | 2007-11-01 | E. I. Du Pont De Nemours And Company | Reduced abrasion of titanium dioxide pigments produced from the chloride process |
| EP1917883A2 (en) * | 2006-11-02 | 2008-05-07 | L'oreal | Applicator for applying a product to the eyelashes or eyebrows |
| CN102276897A (en) * | 2011-06-29 | 2011-12-14 | 广州市聚赛龙工程塑料有限公司 | Polyethylene/nylon alloy composite material and preparation method thereof |
| CN102276925A (en) * | 2011-06-29 | 2011-12-14 | 广州市聚赛龙工程塑料有限公司 | Special material for automobile bumper produced from recovered polyethylene (PE)/polyamide (PA) composite film material and preparation method thereof |
| CN102532868A (en) * | 2011-12-30 | 2012-07-04 | 杭州临安宏凯工程塑料有限公司 | Polyamide composite material, and preparation method and application thereof |
| CN103012955A (en) * | 2012-12-04 | 2013-04-03 | 合肥杰事杰新材料股份有限公司 | High-flowability glass fiber reinforced PP/PA (polypropylene/polyamide) composite and preparation method thereof |
| CN103059556A (en) * | 2011-10-19 | 2013-04-24 | 合肥杰事杰新材料股份有限公司 | Polyamide composition and preparation method thereof |
| CN103289370A (en) * | 2013-01-14 | 2013-09-11 | 东莞市明聚塑胶有限公司 | Modified elastomer of nylon 6 and preparation method thereof |
-
2014
- 2014-09-26 CN CN201410504516.XA patent/CN104292822A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007123975A2 (en) * | 2006-04-20 | 2007-11-01 | E. I. Du Pont De Nemours And Company | Reduced abrasion of titanium dioxide pigments produced from the chloride process |
| EP1917883A2 (en) * | 2006-11-02 | 2008-05-07 | L'oreal | Applicator for applying a product to the eyelashes or eyebrows |
| CN102276897A (en) * | 2011-06-29 | 2011-12-14 | 广州市聚赛龙工程塑料有限公司 | Polyethylene/nylon alloy composite material and preparation method thereof |
| CN102276925A (en) * | 2011-06-29 | 2011-12-14 | 广州市聚赛龙工程塑料有限公司 | Special material for automobile bumper produced from recovered polyethylene (PE)/polyamide (PA) composite film material and preparation method thereof |
| CN103059556A (en) * | 2011-10-19 | 2013-04-24 | 合肥杰事杰新材料股份有限公司 | Polyamide composition and preparation method thereof |
| CN102532868A (en) * | 2011-12-30 | 2012-07-04 | 杭州临安宏凯工程塑料有限公司 | Polyamide composite material, and preparation method and application thereof |
| CN103012955A (en) * | 2012-12-04 | 2013-04-03 | 合肥杰事杰新材料股份有限公司 | High-flowability glass fiber reinforced PP/PA (polypropylene/polyamide) composite and preparation method thereof |
| CN103289370A (en) * | 2013-01-14 | 2013-09-11 | 东莞市明聚塑胶有限公司 | Modified elastomer of nylon 6 and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| 代少俊: "《高性能纤维复合材料》", 28 February 2013, article "1.聚酰胺" * |
| 王国建 等: "《多组分聚合物结构与性能》", 31 May 2010, article "第一章 绪论" * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106147212A (en) * | 2015-04-01 | 2016-11-23 | 合肥杰事杰新材料股份有限公司 | A kind of PA6 compositions and preparation method thereof |
| CN109049874A (en) * | 2018-08-14 | 2018-12-21 | 太仓金凯特新材料科技有限公司 | A kind of high performance antioxidation novel polyethylene plastics |
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Application publication date: 20150121 |