CN102492208A - Method for modifying linear low-density polyethylene by utilizing thermoplastic polyester elastomer - Google Patents
Method for modifying linear low-density polyethylene by utilizing thermoplastic polyester elastomer Download PDFInfo
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- CN102492208A CN102492208A CN201110415553XA CN201110415553A CN102492208A CN 102492208 A CN102492208 A CN 102492208A CN 201110415553X A CN201110415553X A CN 201110415553XA CN 201110415553 A CN201110415553 A CN 201110415553A CN 102492208 A CN102492208 A CN 102492208A
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- density polyethylene
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- low density
- thermoplastic polyester
- polyester elastomer
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Abstract
The invention discloses a method for modifying linear low-density polyethylene by utilizing a thermoplastic polyester elastomer, and relates to a method for improving the performance of the linear low-density polyethylene. By the method, the problem that the tensile strength and cracking elongation of the linear low-density polyethylene cannot be improved simultaneously in the prior art is solved. The method comprises the following steps of: putting the thermoplastic polyester elastomer and the linear low-density polyethylene into an extruder, and sequentially mixing, melting, blending and extruding to obtain a blend; granulating the blend to obtain blend granules; and preparing the modified linear low-density polyethylene by using the blend granules by the extruder or an injection molding machine. The method has the advantages that the cracking elongation of the modified linear low-density polyethylene is between 700.50 and 840.40 percent, and the tensile strength is between 12.124 and 18.758 MP. The method is mainly used for modifying the linear low-density polyethylene.
Description
Technical field
The present invention relates to a kind of method of improved linearity new LDPE (film grade) performance.
Background technology
In order to satisfy construction quality or quality product, to improve the elongation at break and the tensile strength of linear low density polyethylene usually at present, reach and improve the linear low density polyethylene performance demands.Existing adopt technology such as cross-linking modified can the tensile strength of linear low density polyethylene have been improved 30% at most, but the elongation at break of linear low density polyethylene reduce about 20% at least; And the existing modification technologies such as properties-correcting agent, toughner that utilize can improve 90% with the elongation at break of linear low density polyethylene, but the tensile strength of linear low density polyethylene reduces by 10% at least.Therefore the prior art existence can not improve the tensile strength of linear low density polyethylene and the problem of elongation at break simultaneously.
Summary of the invention
The present invention will solve the prior art existence can not improve the tensile strength of linear low density polyethylene and the problem of elongation at break simultaneously, and a kind of method of utilizing thermoplastic polyester elastomer modification linear low density polyethylene is provided.
A kind of method of utilizing thermoplastic polyester elastomer modification linear low density polyethylene; Specifically accomplish according to the following steps: at first thermoplastic polyester elastomer and linear low density polyethylene are dropped in the forcing machine; Mixing the back is 170 ℃～180 ℃ following melt blendings in temperature; Blend is evenly after extrude and promptly obtain blend; Then blend is prepared into the blend particle that particle diameter is 3mm～4mm through granulation, utilizes forcing machine or injection moulding machine that particle diameter is processed the linear low density polyethylene after the modification for the blend particle of 3mm～4mm at last; The mass ratio of described thermoplastic polyester elastomer and linear low density polyethylene is 1: (9～99).
The elongation at break that the present invention prepares the linear low density polyethylene after the modification is 700.50%～840.40%, and tensile strength is 12.124MPa～18.758MPa.
Embodiment
Embodiment one: this embodiment is a kind of method of utilizing thermoplastic polyester elastomer modification linear low density polyethylene, specifically accomplishes according to the following steps:
At first thermoplastic polyester elastomer and linear low density polyethylene are dropped in the forcing machine; Mixing the back is 170 ℃～180 ℃ following melt blendings in temperature; Blend is evenly after extrude and promptly obtain blend; Then blend is prepared into the blend particle that particle diameter is 3mm～4mm through granulation, utilizes forcing machine or injection moulding machine that particle diameter is processed the linear low density polyethylene after the modification for the blend particle of 3mm～4mm at last.
The mass ratio of described thermoplastic polyester elastomer of this embodiment and linear low density polyethylene is 1: (9～99).
Linear low density polyethylene elongation at break after the modification that this embodiment obtains is 700.50%～840.40%, compares elongation at break with the linear low density polyethylene of routine and has improved 4.9%～27.51%; Linear low density polyethylene tensile strength after the modification that this embodiment obtains is 12.124MPa～18.758MPa, with the linear low density polyethylene of routine mutually specific tensile strength improved 0.5～15.62%.
Adopt following verification experimental verification effect of the present invention:
Test one: a kind of method of utilizing thermoplastic polyester elastomer modification linear low density polyethylene, specifically accomplish according to the following steps:
At first thermoplastic polyester elastomer and linear low density polyethylene are dropped in the forcing machine; Mixing the back is 175 ℃ of following melt blendings in temperature; Blend is evenly after extrude and promptly obtain blend; Then blend is prepared into the blend particle that particle diameter is 3mm～4mm through granulation, utilizes forcing machine or injection moulding machine that particle diameter is processed the linear low density polyethylene after the modification for the blend particle of 3mm～4mm at last.
The mass ratio of described thermoplastic polyester elastomer of this embodiment and linear low density polyethylene is 5: 100.
Adopt the linear low density polyethylene after WDT II-10 microcomputer control electronics universal testing machine detects the modification that this test obtains, but the linear low density polyethylene elongation at break after the modification that the knowledge capital test obtains is 741.2%, tensile strength is 15.887MPa.
Embodiment two: this embodiment with the difference of embodiment one is: the mass ratio of described thermoplastic polyester elastomer and linear low density polyethylene is 1: (20～66).Other is identical with embodiment one.
Claims (2)
1. method of utilizing thermoplastic polyester elastomer modification linear low density polyethylene is characterized in that utilizing the method for thermoplastic polyester elastomer modification linear low density polyethylene to accomplish according to the following steps:
At first thermoplastic polyester elastomer and linear low density polyethylene are dropped in the forcing machine; Mixing the back is 170 ℃～180 ℃ following melt blendings in temperature; Blend is evenly after extrude and promptly obtain blend; Then blend is prepared into the blend particle that particle diameter is 3mm～4mm through granulation, utilizes forcing machine or injection moulding machine that particle diameter is processed the linear low density polyethylene after the modification for the blend particle of 3mm～4mm at last; The mass ratio of described thermoplastic polyester elastomer and linear low density polyethylene is 1: (9～99).
2. a kind of method of utilizing thermoplastic polyester elastomer modification linear low density polyethylene according to claim 1, the mass ratio that it is characterized in that described thermoplastic polyester elastomer and linear low density polyethylene is 1: (20～66).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110415553XA CN102492208A (en) | 2011-12-13 | 2011-12-13 | Method for modifying linear low-density polyethylene by utilizing thermoplastic polyester elastomer |
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| CN201110415553XA CN102492208A (en) | 2011-12-13 | 2011-12-13 | Method for modifying linear low-density polyethylene by utilizing thermoplastic polyester elastomer |
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| CN102492208A true CN102492208A (en) | 2012-06-13 |
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| CN201110415553XA Pending CN102492208A (en) | 2011-12-13 | 2011-12-13 | Method for modifying linear low-density polyethylene by utilizing thermoplastic polyester elastomer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070368A (en) * | 2013-01-28 | 2015-11-18 | 蒋菊生 | Three-groove frame and cable using the frame |
| CN105655035A (en) * | 2013-01-28 | 2016-06-08 | 朱保生 | Convenient-to-construct and easy-to-make cable |
| CN105655034A (en) * | 2013-01-28 | 2016-06-08 | 朱保生 | Cable with three-groove framework |
| CN105679437A (en) * | 2013-01-28 | 2016-06-15 | 朱保生 | Cable convenient to construct and with three-groove frame |
| CN114605721A (en) * | 2022-02-24 | 2022-06-10 | 金发科技股份有限公司 | Non-crosslinked polyethylene material and preparation method and application thereof |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105070368A (en) * | 2013-01-28 | 2015-11-18 | 蒋菊生 | Three-groove frame and cable using the frame |
| CN105070369A (en) * | 2013-01-28 | 2015-11-18 | 蒋菊生 | Three-groove frame and cable using frame |
| CN105427942A (en) * | 2013-01-28 | 2016-03-23 | 朱保生 | Convenient-construction cable with three-trough frame |
| CN105489284A (en) * | 2013-01-28 | 2016-04-13 | 朱保生 | Cable simple to fabricate |
| CN105513704A (en) * | 2013-01-28 | 2016-04-20 | 朱保生 | Cable with trislot frame |
| CN105575480A (en) * | 2013-01-28 | 2016-05-11 | 朱保生 | Cable |
| CN105655035A (en) * | 2013-01-28 | 2016-06-08 | 朱保生 | Convenient-to-construct and easy-to-make cable |
| CN105655034A (en) * | 2013-01-28 | 2016-06-08 | 朱保生 | Cable with three-groove framework |
| CN105679437A (en) * | 2013-01-28 | 2016-06-15 | 朱保生 | Cable convenient to construct and with three-groove frame |
| CN114605721A (en) * | 2022-02-24 | 2022-06-10 | 金发科技股份有限公司 | Non-crosslinked polyethylene material and preparation method and application thereof |
| CN114605721B (en) * | 2022-02-24 | 2023-11-03 | 金发科技股份有限公司 | Non-crosslinked polyethylene material and preparation method and application thereof |
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Application publication date: 20120613 |