CN102321289B - Low-density high-pressure polyethylene protection membrane containing polyvinyl chloride and preparation method thereof - Google Patents
Low-density high-pressure polyethylene protection membrane containing polyvinyl chloride and preparation method thereof Download PDFInfo
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- CN102321289B CN102321289B CN2011102262378A CN201110226237A CN102321289B CN 102321289 B CN102321289 B CN 102321289B CN 2011102262378 A CN2011102262378 A CN 2011102262378A CN 201110226237 A CN201110226237 A CN 201110226237A CN 102321289 B CN102321289 B CN 102321289B
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Abstract
The invention discloses a low-density high-pressure polyethylene protection membrane containing polyvinyl chloride. The protection membrane is characterized by comprising the following components by weight percent: 15-40 of polyvinyl chloride, 40-65 of low-density high-pressure polyethylene, 0.1-0.3 of hindered phenol antioxidant, 2-3 of polyethylene wax lubricating agent and 10-20 of compatilizer. The invention also discloses a preparation method of the protection membrane. Compared with the prior art, the preparation method disclosed by the invention has the advantages that through the proper formula and blending modification of the materials, the binding power of low-density high-pressure polyethylene and polyvinyl chloride when coextrusion molding is carried out is improved, and low-density high-pressure polyethylene is ensured not to be dropped before paint is sprayed, thereby improving production efficiency and reducing the rejection rate of a product.
Description
Technical field
The present invention relates to a kind of protective membrane of low-density high-pressure polyethylene, when polyvinyl chloride elastomerics spray paint, protective membrane is extruded to adhere to by high temperature does not need the protection part that sprays, after waiting spraying to finish, can tear protective membrane off.The invention also discloses the preparation method of this protective membrane.
Background technology
Automotive department divides the decoration sealed strip to need to use pvc material in design process, and some high-grade car need to carry out paint spraying to the sealed strip of polyvinyl chloride material in order to reach effect attractive in appearance.If the sealing position of sealed strip is not protected; the all sites of sealed strip all can be able to be sprayed paint like this in the paint spraying process; after the hermetic unit of sealed strip is sprayed paint; the stone effect that does not have sealing that polyvinyl chloride is become; can produce the risk of leaking out and leaking, easily cause quality problems.Before the spraying, the sealing position to sealed strip will be protected for this reason, and at present, common countermeasure is by special frock, the sealing position to be hidden protection, and spraying will remove frock after finishing.Yet this just needs to increase tooling device, will certainly increase cost and drop into, and has also reduced production efficiency simultaneously.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of low-density high-pressure polyethylene protective film that contains polyvinyl chloride for the above-mentioned state of the art; when polyvinyl chloride elastomerics spray paint; protective membrane is extruded to adhere to by high temperature do not need the protection part that sprays; after the spraying end, can tear protective membrane off.
Another technical problem to be solved by this invention is to provide a kind of low-density high-pressure polyethylene protective film of containing polyvinyl chloride good with polyvinyl chloride cohesiveness.
Another technical problem to be solved by this invention is to provide the preparation method a kind of and low-density high-pressure polyethylene protective film that contains polyvinyl chloride that polyvinyl chloride cohesiveness is good.
The present invention solves the problems of the technologies described above the technical scheme that adopts: a kind of low-density high-pressure polyethylene protective film that contains polyvinyl chloride is characterized in that comprising following component and weight proportion:
Best composition and weight proportion:
Described Hinered phenols antioxidant can be that (four [3-(3 for Irganox 1010,5-di-t-butyl-4-hydroxyphenyl) propionic acid] quaternary amyl alcohol ester), oxidation inhibitor AT-300 (4,4 '-thiobis (the 6-tertiary butyl-3-methylphenol) or 4,4 '-thiobis (6-tertiary butyl meta-cresol)), at least a in antioxidant 1076 (β-positive octadecanol ester of (3,5-di-tert-butyl-hydroxy phenyl) propionic acid).
The lubricant of described polyethylene wax class can be at least a in PE-520 wax powder, polyethylene wax PE-wax, polyethylene wax CH-2A, polyethylene wax CH-4A.PE-520 wax powder, polyethylene wax PE-wax, polyethylene wax CH-2A, polyethylene wax CH-4A all can buy on market.
Described compatilizer can be at least a in Research of Grafting Malaic Anhydride Onto Polyethylene, vinylformic acid.
A kind of preparation method who contains the low-density high-pressure polyethylene protective film of polyvinyl chloride is characterized in that comprising the steps:
1. each component is added in mixing machine according to weight proportion, and stir;
2. the material after stirring is put into the barrel of twin screw extruder and successively by extruding passage and head is extruded, wherein the passage of extruding of forcing machine divides five districts, the temperature control condition in each district is followed successively by 160 ℃～170 ℃, 170 ℃～180 ℃, 180 ℃～190 ℃, 190 ℃～200 ℃, 195 ℃～205 ℃, and the temperature control condition of cross-head is 190 ℃～200 ℃;
3. carry out coolingly after extruding, jointly be extruded into protective membrane after pelletizing together with polyvinyl chloride.Preferably complete jointly at single screw extrusion machine and extrude.
As preferably, the stirring velocity of step in 1. is 110U/min～130U/min, and churning time is 4～8 minutes.
As preferably, the screw speed of the twin screw extruder of step in 2. is 150U/min～300U/min.
Compared with prior art; the invention has the advantages that: the low-density high-pressure polyethylene material is a kind of cheap; unit elongation is very good; use one of material very widely; extrusion moulding is good; extrusion temperature and pvc material are more close, are top-priority materials so be used for making protective membrane.But the shortcoming of this material: when low-density high-pressure polyethylene and polyvinyl chloride carry out co-extrusion; because low-density high-pressure polyethylene is non-polar material; polyvinyl chloride be the such low-density high-pressure polyethylene of polar material and polyvinyl chloride substantially without any cohesive force; cause product in transportation and the course of processing; low-density high-pressure polyethylene and polyvinyl chloride are very easy to throw off; do not have like this provide protection, particularly do not have the effect of protection in later process paint spraying process.
Because low-density high-pressure polyethylene is nonpolar polymkeric substance, and the polymkeric substance of polyvinyl chloride polarity is immiscible in the mechanical blending process, can reduce the performance of modifying material, so must add a kind of phase solvent, the interface of polyvinyl chloride and low-density high-pressure polyethylene can closely be linked.
Suitable formula and blending and modifying by above material; improved low-density high-pressure polyethylene and the polyvinyl chloride cohesive force when carrying out coextrusion mold; guaranteed can not come off before paint spraying; thereby improved production efficiency; the condemnation factor that has reduced product (refers to because the linearity problem that causes after paint spraying; also have in the course of processing protective membrane problem that comes off), can bring up to 100% by original 90%.
Description of drawings
Fig. 1 is the structural representation of twin screw extruder.
Embodiment
Embodiment is described in further detail the present invention below in conjunction with accompanying drawing.
Embodiment 1: the low-density high-pressure polyethylene protective film that contains polyvinyl chloride comprises following component and weight proportion: polyvinyl chloride 30, low-density high-pressure polyethylene 52.3, Irganox 1,010 0.2, PE-520 wax powder 2.5, Research of Grafting Malaic Anhydride Onto Polyethylene 15.
The preparation method of protective membrane comprises the steps:
1. each component is added in mixing machine according to weight proportion, and stir, stirring velocity is 110U/min～130U/min, and churning time is 4～8 minutes;
2. the material after stirring is put into the barrel 1 of twin screw extruder and successively by extruding passage 2 and head 3 is extruded, wherein the passage of extruding of forcing machine divides five districts, zone 1, zone 2 22, zone 3 23, zone 4 24 and zone 5 25 temperature control conditions are followed successively by 160 ℃～170 ℃, 170 ℃～180 ℃, 180 ℃～190 ℃, 190 ℃～200 ℃, 195 ℃～205 ℃, and the temperature control condition of cross-head 3 is 190 ℃～200 ℃; The screw rod of twin screw extruder (in figure, nothing shows) rotating speed is 150U/min～300U/min, with reference to shown in Figure 1;
3. carry out at cooling trough after extruding cooling, by jointly being extruded into protective membrane by single screw extrusion machine after the dicing machine pelletizing together with polyvinyl chloride.
Embodiment 2: the low-density high-pressure polyethylene protective film that contains polyvinyl chloride comprises following component and weight proportion: polyvinyl chloride 15, low-density high-pressure polyethylene 60, oxidation inhibitor AT-300 0.1, PE-520 wax powder 3, Research of Grafting Malaic Anhydride Onto Polyethylene 20.Preparation method's reference example 1.
Embodiment 3: the low-density high-pressure polyethylene protective film that contains polyvinyl chloride comprises following component and weight proportion: polyvinyl chloride 40, low-density high-pressure polyethylene 40, antioxidant 1076 0.3, polyethylene wax CH-2A 2, vinylformic acid 10.Preparation method's reference example 1.
Embodiment 4: the low-density high-pressure polyethylene protective film that contains polyvinyl chloride comprises following component and weight proportion: polyvinyl chloride 35, and low-density high-pressure polyethylene 65, Irganox 1,010 0.2, polyethylene wax CH-4A2.3, vinylformic acid 17.Preparation method's reference example 1.
The various embodiments described above gained protective membrane all meets the index of following table:
| Project | Test method/standard | Index |
| Hardness (15s) | ASTM D2240 (15S reading) | 80+/-5A |
| Tensile strength | ASTM D412(50mm/min) | ≥7MPa |
| Unit elongation | ASTM D412(50mm/min) | ≥180％ |
| With PVC cohesive force (key index) | ASTM D903(50mm/min) | 0.8N/25mm-1.0N/25mm |
| Melting index (key index) | ASTMD1238(190℃，2.16KG) | 3.0+/-0.5g/10min |
Claims (7)
1. low-density high-pressure polyethylene protective film that contains polyvinyl chloride is characterized in that comprising following component and weight proportion:
Described compatilizer is Research of Grafting Malaic Anhydride Onto Polyethylene.
2. the low-density high-pressure polyethylene protective film that contains polyvinyl chloride according to claim 1 is characterized in that comprising following component and weight proportion:
3. the low-density high-pressure polyethylene protective film that contains polyvinyl chloride according to claim 1 and 2 is characterized in that described Hinered phenols antioxidant is at least a in Irganox 1010, oxidation inhibitor AT-300, antioxidant 1076.
4. the low-density high-pressure polyethylene protective film that contains polyvinyl chloride according to claim 1 and 2, the lubricant that it is characterized in that described polyethylene wax class are at least a in PE-520 wax powder, polyethylene wax CH-2A, polyethylene wax CH-4A.
5. any preparation method who contains the low-density high-pressure polyethylene protective film of polyvinyl chloride in a claim 1～4, is characterized in that comprising the steps:
1. each component is added in mixing machine according to weight proportion, and stir;
2. the material after stirring is put into the barrel of twin screw extruder and successively by extruding passage and head is extruded, wherein the passage of extruding of forcing machine divides five districts, the temperature control condition in each district is followed successively by 160 ℃～170 ℃, 170 ℃～180 ℃, 180 ℃～190 ℃, 190 ℃～200 ℃, 195 ℃～205 ℃, and the temperature control condition of cross-head is 190 ℃～200 ℃;
3. carry out coolingly after extruding, jointly be extruded into protective membrane after pelletizing together with polyvinyl chloride.
6. preparation method according to claim 5, is characterized in that the stirring velocity during step 1. is 110U/min～130U/min, and churning time is 4～8 minutes.
7. preparation method according to claim 5, the screw speed that it is characterized in that the twin screw extruder during step 2. is 150U/min～300U/min.
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| CN2011102262378A CN102321289B (en) | 2011-08-05 | 2011-08-05 | Low-density high-pressure polyethylene protection membrane containing polyvinyl chloride and preparation method thereof |
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| CN2011102262378A CN102321289B (en) | 2011-08-05 | 2011-08-05 | Low-density high-pressure polyethylene protection membrane containing polyvinyl chloride and preparation method thereof |
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| CN102321289B true CN102321289B (en) | 2013-06-05 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102775699A (en) * | 2012-08-10 | 2012-11-14 | 昆山乔锐金属制品有限公司 | Formula of composite plastic plate |
| CN103172952B (en) * | 2013-04-08 | 2015-07-29 | 陕西理工学院 | A kind of preparation method being applicable to the flyash-resin composite materials of extrusion moulding |
| CN105254984A (en) * | 2015-11-23 | 2016-01-20 | 常熟市天娇塑业有限公司 | Transparent polyethylene film |
| CN105400040A (en) * | 2015-11-23 | 2016-03-16 | 常熟市天娇塑业有限公司 | Low-foamed polyethylene film |
| CN106188800A (en) * | 2016-07-12 | 2016-12-07 | 广东紫泉标签有限公司 | A kind of label film preparation method |
| CN106147076A (en) * | 2016-07-12 | 2016-11-23 | 广东紫泉标签有限公司 | A kind of label film |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1304958A (en) * | 2000-10-26 | 2001-07-25 | 招远市海星塑料厂 | Modified UPVC plastic pipe and its preparing process |
| CN1419586A (en) * | 2000-08-21 | 2003-05-21 | 昭和电工株式会社 | Vinyl chloride resin composition |
| CN1483761A (en) * | 2002-09-18 | 2004-03-24 | 江苏琼花高科技股份有限公司 | PVC sheet material and production process |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1419586A (en) * | 2000-08-21 | 2003-05-21 | 昭和电工株式会社 | Vinyl chloride resin composition |
| US6706820B2 (en) * | 2000-08-21 | 2004-03-16 | Showa Denko K.K. | Vinyl chloride resin composition |
| CN1304958A (en) * | 2000-10-26 | 2001-07-25 | 招远市海星塑料厂 | Modified UPVC plastic pipe and its preparing process |
| CN1483761A (en) * | 2002-09-18 | 2004-03-24 | 江苏琼花高科技股份有限公司 | PVC sheet material and production process |
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Owner name: NINGBO TAIYONG AUTO PARTS CO., LTD. Free format text: FORMER OWNER: NINGBO XINTAI MACDINERY CO., LTD. Effective date: 20131030 |
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Effective date of registration: 20131030 Address after: 315800 Ningbo, Beilun, Dagang District, No., No. six road, No. 8 Patentee after: Ningbo Taiyong Auto Parts Co., Ltd. Address before: 315800 Dagang Industrial City, Beilun District, Zhejiang, Ningbo Patentee before: Ningbo Xintai Machinery Co., Ltd. |