CN103613825A - Processing technique for producing plastic thin film from mixed polyethylene materials - Google Patents
Processing technique for producing plastic thin film from mixed polyethylene materials Download PDFInfo
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- CN103613825A CN103613825A CN201310550116.8A CN201310550116A CN103613825A CN 103613825 A CN103613825 A CN 103613825A CN 201310550116 A CN201310550116 A CN 201310550116A CN 103613825 A CN103613825 A CN 103613825A
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- Prior art keywords
- density polyethylene
- thin film
- plastics film
- polyethylene
- film
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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
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/04—Homopolymers or copolymers of ethene
- C08L23/06—Polyethene
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2323/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2323/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2323/04—Homopolymers or copolymers of ethene
- C08J2323/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2423/00—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers
- C08J2423/02—Characterised by the use of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Derivatives of such polymers not modified by chemical after treatment
- C08J2423/04—Homopolymers or copolymers of ethene
- C08J2423/06—Polyethene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/16—Applications used for films
-
- 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
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/06—Properties of polyethylene
- C08L2207/062—HDPE
-
- 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
- C08L2207/06—Properties of polyethylene
- C08L2207/066—LDPE (radical process)
Abstract
The invention discloses a processing technique for producing a plastic thin film from mixed polyethylene materials. The processing technique comprises the steps: (1) selecting the materials for producing the plastic thin film: selecting the polyethylene materials formed by mixing 90% of high density polyethylene and 10% of low density polyethylene as the material for producing a box body and a box cover, wherein the density of the high density polyethylene is 0.942-0.965g/cm<3> and the density of the low density polyethylene is 0.890-0.915g/cm<3>; (2) mixing and melting the materials; (3) carrying out primary extrusion molding; (4) carrying out calendaring molding; (5) carrying out further stretching molding; (6) placing a flexible rod; and (7) cooling and molding finally. The processing technique is characterized in that the high density polyethylene is mixed with the low density polyethylene, and the mixture is used as the raw material so that optimal balance between the tension stress and the tensile strength of the plastic thin film is realized, in the meantime, strontium aluminate which is a chemical component of fluorescent powder is added to the material so that the material is capable of emitting fluorescent light to warn animals of not getting close to the thin film of a greenhouse to cause damage, and the plastic thin film is thinner than thin films sold in the market so that light is capable of transmitting through the thin film and the crops can have the photosynthesis better; and as a result, the yield of crops is increased; and the thin film is low in consumption, high in utilization and capable of meeting the market requirements.
Description
Technical field
The present invention relates to the making field of plastics film, particularly relate to a kind of complete processing of plastics film.
Background technology
Along with social development, plastics film industry is also grown at development, in all trades and professions such as agricultural, food product pack, medical and health, electromechanics, all have application, especially in agricultural, the application of plastics film is more extensive, has solved the under-supply drawback of agricultural byproducts in China's agricultural.
China Shi Yige large agricultural country, the various vegetable and fruits of agricultural planting need a large amount of plastics films, traditional plastic film thickness mostly is 0.08-0.12mm, thickness is thicker, as awning film, is unfavorable for photosynthesis of plant, and, the anti-aging effect of this type of film is poor, easily by various fields animal, torn and sting rottenly, can not send fluorescence night, can not serve as warning to animal.And in conventional films, do not establish the soft rod of rubber, film can not be rolled over neat folding, be unfavorable for keeping, the file that is 200910041868.5 as application number discloses a kind of manufacturing process and anti-skidding plastic film of anti-skidding plastic film, technique comprises: by Ge Liao road, supply with at least bi-material respectively to die head, wherein: the melting temperature (Tm) that forms the outer field material of plastic film is the highest, the speed of cooling that forms the outer field material of plastic film is lower than the speed of cooling that is adjacent the material of layer; In described Ge Liao road, each material described in melting, makes the graininess of outer field material in incomplete fusion, and other layers of materials are in complete molten state; At described die head place, described each material is carried out to coextrusion film blowing; Cooling, obtain the plastics film of moulding, design is complicated, but film can not be warned animal, can not fold to be difficult for keeping and thickness does not have special consideration, can not effectively utilize illumination to improve crop yield.
Existing plastics film kind is more, although they have characteristic separately, use field is all limited, also exists defect separately.
Summary of the invention
For overcoming the deficiency in prior art, the object of the invention is to provide a kind of plastics film that can send fluorescence at night, simultaneously in the complete processing of plastics film that is provided with the soft rod of quality of rubber materials in the middle of plastics film, its technique rationally, succinct.
For realizing object of the present invention, technical scheme of the present invention is as follows:
Utilize mix polyethylene material to make a complete processing for plastics film, its processing step is as follows:
(1) making plastic film material selects; Select the mix polyethylene material of high density polyethylene(HDPE) 10% and Low Density Polyethylene 90% as the material of making plastics film, the density of described high density polyethylene(HDPE) is 0.942～0.965 g/cm
3, the density of described Low Density Polyethylene is 0.890～0.915 g/cm
3.
(2) mixed melting of material; The polythene material of selecting in step (1) and strontium aluminate and 2,6 ditertiary butyl p cresol are fully uniformly mixed by the mass ratio of 9:0.5:0.5, are heated to molten state;
(3) first one-step extrusion molding; By the material plastics extruder extrusion moulding after melting in step (2);
(4) calendering formation; The material that rolls extrusion moulding in step (3) with rolling press, the thickness after calendering is 0.3-0.8mm;
(5) further drawing and forming; With heating unit, by the film heating after calendering described in (4) stretching, after stretching, thickness is 0.03-0.08mm;
(6) soft rod is laid; In described step (5) heat-processed, on plastics film, every one meter of wide place, establish a soft rod;
(7) cooling and final molding; Plastics film in step (6) is at room temperature cooling gradually, final molding.
The complete processing of above-mentioned a kind of plastics film, wherein, in described step (2), described in be heated to molten state Heating temperature be 200-220 ℃.
The complete processing of above-mentioned a kind of plastics film, wherein, in described step (5), described further drawing and forming heating unit temperature is made as 160-170 ℃.
Further, in described step (6), described soft rod is natural rubber material.Snappiness is good, is conducive in rolling thin-film process curling foldingly flexibly, and meanwhile, natural rubber is a kind of impregnating material, extends plastics film work-ing life, improves plastics film service efficiency.
The plastics film that the present invention makes by above-mentioned technique, has used highly close polyethylene to mix application with Low Density Polyethylene, makes plastics film reach optimum balance between tension stress and tensile strength.Meanwhile, in material, added strontium aluminate, its Chemical Composition that is fluorescent material, night, plastics film can send fluorescence, and periphery animal is played to warning function, avoided animal to tear damage greenhouse film.
Plastics film of the present invention thickness after rolling and stretching is 0.03-0.08mm, and this thickness thin film is thinner than market plastics film, is conducive in light is transmitted into, farm crop can better carry out photosynthesis, improve crop yield, this film consumptive material is few and utilization ratio is high, meeting the market requirement.
Embodiment
For technique means, creation characteristic that the present invention is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
embodiment 1:
A kind of complete processing of utilizing mix polyethylene material to make plastics film of the present embodiment, its processing step is as follows:
(1) making plastic film material selects; Select the mix polyethylene material of high density polyethylene(HDPE) 10% and Low Density Polyethylene 90% as the material of making plastics film, the density of described high density polyethylene(HDPE) is 0.942g/cm3, and the density of described Low Density Polyethylene is 0.890 g/cm3;
(2) mixed melting of material; The polythene material of selecting in step (1) and strontium aluminate and 2,6 ditertiary butyl p cresol are fully uniformly mixed by the mass ratio of 9:0.5:0.5, are heated to molten state, described in be heated to molten state Heating temperature be 200 ℃;
(3) first one-step extrusion molding; By the material plastics extruder extrusion moulding after melting in step (2);
(4) calendering formation; The material that rolls extrusion moulding in step (3) with rolling press, the thickness after calendering is 0.3mm;
(5) further drawing and forming; Using heating unit, is 160 ℃ by heating unit Temperature Setting, and by the film heating after calendering described in (4) stretching, after stretching, thickness is 0.03mm;
(6) soft rod is laid; In described step (5) heat-processed, on plastics film, every one meter of wide place, establish the soft rod of a natural rubber;
(7) cooling and final molding; Plastics film in step (6) is at room temperature cooling gradually, final molding.
embodiment 2:difference from Example 1 is, described in step (1), the density of high density polyethylene(HDPE) is 0.955g/cm3, the density of described Low Density Polyethylene is 0.905g/cm3, in step (2), the Heating temperature that is heated to molten state is 210 ℃, thickness in step (4) after film rolling is 0.55mm, and described in step (5), further drawing and forming heating unit temperature is made as 165 ℃, and after film further stretches, thickness is 0.055mm.
embodiment 3:difference from Example 1 is, the density of the described high density polyethylene(HDPE) of step (1) is 0.965g/cm3, the density of described Low Density Polyethylene is 0.915g/cm3, the Heating temperature that is heated to molten state in step (2) is 220 ℃, thickness in step (4) after film rolling is 0.8mm, described in step (5), further drawing and forming heating unit temperature is made as 170 ℃, and after film further stretches, thickness is 0.08mm.
In above-mentioned three embodiment:
| Embodiment 1 | Embodiment 2 | Embodiment 3 | Result | |
| Firmly pull plastics film | 60 Newton force | 70 Newton force | 80 Newton force | In embodiment 1,2, plastics film is torn, and in embodiment 3, plastics film is not damaged |
| Make booth with plastics film winter, plants Chinese cabbage in canopy | 10 days | 15 days | 20 days | In embodiment 1, Chinese cabbage is highly 20cm, and in embodiment 2, Chinese cabbage is highly 16cm, and in embodiment 3, Chinese cabbage is highly 15cm |
The plastics film that the present invention makes by above-mentioned technique, has used highly close polyethylene to mix application with Low Density Polyethylene, makes plastics film reach optimum balance between tension stress and tensile strength.Meanwhile, in material, added strontium aluminate, its Chemical Composition that is fluorescent material, night, plastics film can send fluorescence, and periphery animal is played to warning function, avoided animal to tear damage greenhouse film.
Plastics film of the present invention thickness after rolling and stretching is 0.03-0.08mm, and this thickness thin film is thinner than market plastics film, is conducive in light is transmitted into, farm crop can better carry out photosynthesis, improve crop yield, this film consumptive material is few and utilization ratio is high, meeting the market requirement.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes description of the present invention to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (5)
1. utilize mix polyethylene material to make a complete processing for plastics film, it is characterized in that, its processing step is as follows:
(1) making plastic film material selects; Select the mix polyethylene material of high density polyethylene(HDPE) 10% and Low Density Polyethylene 90% as the material of making plastics film, the density of described high density polyethylene(HDPE) is 0.942～0.965 g/cm
3, the density of described Low Density Polyethylene is 0.890～0.915 g/cm
3.
2.(2) the mixed melting of material; The polythene material of selecting in step (1) and strontium aluminate and 2,6 ditertiary butyl p cresol are fully uniformly mixed by the mass ratio of 9:0.5:0.5, are heated to molten state;
(3) first one-step extrusion molding; By the material plastics extruder extrusion moulding after melting in step (2);
(4) calendering formation; The material that rolls extrusion moulding in step (3) with rolling press, the thickness after calendering is 0.3-0.8mm;
(5) further drawing and forming; With heating unit, by the film heating after calendering described in (4) stretching, after stretching, thickness is 0.03-0.08mm;
(6) soft rod is laid; In described step (5) heat-processed, on plastics film, every one meter of wide place, establish a soft rod;
(7) cooling and final molding; Plastics film in step (6) is at room temperature cooling gradually, final molding.
3. the complete processing of plastics film according to claim 1, is characterized in that, in described step (2), described in be heated to molten state Heating temperature be 200-220 ℃.
4. the complete processing of plastics film according to claim 1, is characterized in that, in described step (5), described heating unit temperature is made as 160-170 ℃.
5. the complete processing of plastics film according to claim 1, is characterized in that, in described step (6), described soft rod is natural rubber material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310550116.8A CN103613825A (en) | 2013-11-08 | 2013-11-08 | Processing technique for producing plastic thin film from mixed polyethylene materials |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310550116.8A CN103613825A (en) | 2013-11-08 | 2013-11-08 | Processing technique for producing plastic thin film from mixed polyethylene materials |
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| CN103613825A true CN103613825A (en) | 2014-03-05 |
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| CN201310550116.8A Pending CN103613825A (en) | 2013-11-08 | 2013-11-08 | Processing technique for producing plastic thin film from mixed polyethylene materials |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788449A (en) * | 2013-12-06 | 2014-05-14 | 苏州瑞邦塑胶有限公司 | Processing technology of plastic film |
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| CN101503523A (en) * | 2008-12-05 | 2009-08-12 | 天津市食品加工工程中心 | Rodent-resistant air-conditioning preservative film for grain |
| WO2012015807A1 (en) * | 2010-07-28 | 2012-02-02 | Equistar Chemical, Lp | Polyethylene blends and films |
| CN102585340A (en) * | 2012-02-06 | 2012-07-18 | 勉县三丰农业科技塑料制品有限公司 | Production method of plastic greenhouse film with heat insulating function |
-
2013
- 2013-11-08 CN CN201310550116.8A patent/CN103613825A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101503523A (en) * | 2008-12-05 | 2009-08-12 | 天津市食品加工工程中心 | Rodent-resistant air-conditioning preservative film for grain |
| WO2012015807A1 (en) * | 2010-07-28 | 2012-02-02 | Equistar Chemical, Lp | Polyethylene blends and films |
| CN102585340A (en) * | 2012-02-06 | 2012-07-18 | 勉县三丰农业科技塑料制品有限公司 | Production method of plastic greenhouse film with heat insulating function |
Non-Patent Citations (3)
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|---|
| 吴智华,等: "《高分子材料成型工艺学》", 30 September 2010, 四川大学出版社, article "《高分子材料成型工艺学》", pages: 445-456 * |
| 李德龙，等: "加工工艺对聚乙烯热收缩膜性能的影响", 《塑料科技》, vol. 40, no. 2, 29 February 2012 (2012-02-29), pages 64 - 66 * |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103788449A (en) * | 2013-12-06 | 2014-05-14 | 苏州瑞邦塑胶有限公司 | Processing technology of plastic film |
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Application publication date: 20140305 |