CN1053610C - Article with net structure - Google Patents
Article with net structure Download PDFInfo
- Publication number
- CN1053610C CN1053610C CN95109833A CN95109833A CN1053610C CN 1053610 C CN1053610 C CN 1053610C CN 95109833 A CN95109833 A CN 95109833A CN 95109833 A CN95109833 A CN 95109833A CN 1053610 C CN1053610 C CN 1053610C
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- CN
- China
- Prior art keywords
- polyethylene
- network structure
- weight
- structure thing
- admixture
- Prior art date
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- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
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Abstract
The present invention relates to a novel article with a net structure, which has high strength and high extensibility. The article with a net structure comprises novel polyethylene and/or polyethylene copolymer and the mixture of the traditional polyethylene and is obtained through extrusion and netting, wherein the novel polyethylene or polyethylene copolymer has the characteristic that the density is from 0.86 to 0.915 g/cm<3>; the fusion index I10 is from 0.5 to 7.5 g/min measured according to ASTMD-1238; the molecular weight distribution (Mw/Mn) is smaller than 3.5; or the density is from 0.86 to 0.915 g/cm<3>; the fusion index (I10/I2) is greater than or equal to 5.63 measured according to ASTMD-1238; the molecular weight distribution (Mw/Mn) is greater than or equal to the fusion index (I10/I2) which subtracts 4.63; 1000 carbon atoms have 0.01 to 3 long-chain branches.
Description
The present invention is relevant a kind of novel network structure thing, and it has high strength and higher extension ratio by conventional P E or the prepared network structure thing of PE/PVA, thereby can load heavier object.
Utilize the admixture of low density polyethylene (LDPE) (LDPE)/LLDPE (LLDPE) or low density polyethylene (LDPE)/ethylene-vinyl acetate (EVA) by traditional network structure system, be delivered to rotating die head or other can form netted die head through extruder fusion heating, be bonded together at the moment two strands of fusion creepings that just go out die head, the bonding action of this kind goes round and begins again and forms the network structure thing.But because this kind extrudes in the system network process, the fusion creeping tie up to just go out behind the die head bonding, therefore abutment part mechanical strength is the most weak, cause the mechanical strength (hot strength and extension ratio) of operating direction to be subjected to the restriction at this abutment, and present more weak hot strength and less extension ratio and less horizontal stent, and sense of touch is bad.
The inventor promptly studies and develops and the present invention at stating shortcoming on traditional network structure thing.
The present invention system provides a kind of novel network structure thing, and it has high strength and high extension ratio, thereby more traditional network structure thing can carry heavier object.
The present invention system provides the novel network structure thing of a kind of tool high strength and high extension ratio, this network structure system is made through extruding the processing of system network process by the admixture that comprises novel polyethylene or ethylene copolymer and conventional polyethylene, promptly, after admixture extrudes, make the network structure thing through cooling again through a die head that can form guipure; Wherein should the novelty polyethylene or ethylene copolymer be characterized as density 0.86～0.915g/cm
2, melt index (l
10) (measuring according to ASTM D-1238) 0.5～7.5/10min, molecular weight distribution (Mw/Mn) is less than 3.5; Or density 0.86～0.915g/cm
3, melt index is than (l
10/ l
2) (measuring according to ASTM S-1238) more than or equal to 5.63, molecular weight distribution (Mw/Mn) more than or equal to melt index than (l
10/ l
2) deduct 4.63, and 0.01 to 3 long chain branch is arranged on 1000 carbon atoms.
Because used novel polyethylene or the ethylene copolymer (hereinafter being expressed as MPE-1 or MPE-2 respectively) of the present invention have following characteristic: the flexibility of low-density and tool rubber like, low seal temperature, high hot glue viscosity and high sealing intensity; The present invention promptly utilizes novel polyethylene or the ethylene copolymer and conventional polyethylene (PE) fusion of these characteristics of tool, make the gained admixture extrude the system network process again and make the network structure thing through tradition, because the novel polyethylene in the admixture of the present invention or the as above characteristic of ethylene copolymer, thereby can improve admixture and can be improved going out die head thing abutment mechanical strength, and present the hot strength and the extension ratio of more traditional network structure object height.
Can be used for conventional polyethylene of the present invention is low density polyethylene (LDPE) (LDPE) or LLDPE (LLDPE).In the novel network structure thing of the present invention, the amount of novel polyethylene or ethylene copolymer is 3% to 97% weight of admixture total amount, is preferably 35 to 65% weight; The amount of polyethylene commonly used is 97% to 3% weight of admixture total amount, is preferably 65% to 35% weight.
Used novel polyethylene or ethylene copolymer system are by Exxon company and Dow the company product of commercialization among the present invention.
The present invention is directed to the admixture that forms by aforementioned novel polyethylene or ethylene copolymer and conventional P E of the designed allotment of shortcoming of traditional network structure thing, make the network structure thing through traditional mesh bag process, have higher hot strength and the extension ratio of network structure thing that makes than conventional P E or PE/EVA admixture after tested.
Now be described in more detail the present invention with the following example, but therefore do not limit the present invention's scope.Embodiment 1
It is even with the MPE-1 of 50 weight branches (available from the trade name Exact 4024 of Exxon company) blending to get the low density polyethylene (LDPE) (LDPE) of 50 weight branches, place the about 230 ℃ extruder fusion fusion of temperature, and be delivered to rotating die head and extrude, make two strands of fusion creepings bonding and make the network structure thing.Embodiment 2
According to the same procedure of embodiment 1, but use 50 weight fraction MPE-2 (available from the trade name Engate EG-8100 of Dow company) to replace the MPE-1 of 50 weight portions, make the network structure thing.Comparative example
According to the same procedure of embodiment 1, but being 75 weight fraction, the amount of change low density polyethylene (LDPE) reaches the MPE-1 that replaces 50 weight branches with the vinyl-vinyl acetate copolymer of 25 weight branches, make the network structure thing.Test case
Get the foregoing description 1 and 2 and the network structure thing that makes of comparative example, respectively get 5 centimeters long samples, utilize on the universal testing machine lower clamp respectively to clamp sample 1 centimeter place up and down, stretch with the speed of 5cm/min, measure the hot strength and the extension ratio of breakaway poing, the results are shown in following table.
| Embodiment 1 | Embodiment 2 | Comparative example | |
| Hot strength | 250N | 240N | 156N |
| Extension ratio | 430％ | 350％ | 230％ |
By above-mentioned test result, can obviously find out the present invention's admixture, have higher hot strength and extension ratio than traditional network structure thing.
Claims (4)
1. network structure thing is to be made through the extruder melt-processed by the admixture that comprises following composition:
(a) polyethylene, its density are 0.86～0.915g/cm
3, melt index (l
10) be 0.5～7.5g/10min, molecular weight distribution (Mw/Mn) is less than 3.5; Or
(b) ethylene copolymer, its density are 0.86～0.915g/cm
3, melt index is than (l
10/ l
2) more than or equal to 5.63, molecular weight distribution (Mw/Mn) more than or equal to melt index than (L
10/ l
2) deduct 4.63 (Mw/Mn 〉=l
10/ l
2-4.63), and 0.01～3 long chain branch arranged on 1000 carbon atoms; And
(c) polyethylene commonly used.
2. the network structure thing of claim 1, wherein composition (a) or amount (b) they are 3%～97% weight of admixture gross weight, the amount of composition (c) is 97%～3% weight of admixture gross weight.
3. the network structure thing of claim 2, wherein composition (a) or amount (b) they are 35～65% weight of admixture gross weight, the amount of composition (c) is 65～35% weight of admixture gross weight.
4. the network structure thing of claim 1, wherein composition (c) is low density polyethylene (LDPE) (LDPE) or LLDPE (LLDPE).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95109833A CN1053610C (en) | 1995-08-21 | 1995-08-21 | Article with net structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN95109833A CN1053610C (en) | 1995-08-21 | 1995-08-21 | Article with net structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1143567A CN1143567A (en) | 1997-02-26 |
| CN1053610C true CN1053610C (en) | 2000-06-21 |
Family
ID=5077393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN95109833A Expired - Fee Related CN1053610C (en) | 1995-08-21 | 1995-08-21 | Article with net structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1053610C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103874434B (en) * | 2011-12-27 | 2016-02-03 | Ykk株式会社 | With the pull head of shut-down mechanism |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314151A2 (en) * | 1987-10-27 | 1989-05-03 | The Dow Chemical Company | Polyethylene fibers |
| JPH02299822A (en) * | 1989-05-15 | 1990-12-12 | Jsp Corp | Olefin resin foamed molding and manufacture thereof |
| WO1995005419A1 (en) * | 1993-08-17 | 1995-02-23 | The Dow Chemical Company | Polyolefin blends and their solid state processing |
-
1995
- 1995-08-21 CN CN95109833A patent/CN1053610C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0314151A2 (en) * | 1987-10-27 | 1989-05-03 | The Dow Chemical Company | Polyethylene fibers |
| JPH02299822A (en) * | 1989-05-15 | 1990-12-12 | Jsp Corp | Olefin resin foamed molding and manufacture thereof |
| WO1995005419A1 (en) * | 1993-08-17 | 1995-02-23 | The Dow Chemical Company | Polyolefin blends and their solid state processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1143567A (en) | 1997-02-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20000621 Termination date: 20100821 |