CN104004285A - High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof - Google Patents
High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof Download PDFInfo
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- CN104004285A CN104004285A CN201410256486.5A CN201410256486A CN104004285A CN 104004285 A CN104004285 A CN 104004285A CN 201410256486 A CN201410256486 A CN 201410256486A CN 104004285 A CN104004285 A CN 104004285A
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Abstract
The invention discloses a high-antifogging polystyrene sheet suitable for special food packaging and a manufacturing method thereof. The high-antifogging polystyrene sheet is prepared from the following raw materials in percentage by weight: 90-95% of general-grade polystyrene, and 5-10% of resin K. The manufacturing method comprises the following steps: mixing the raw materials in proportion; carrying out melt extrusion on the obtained mixture by an extruder; feeding a melt into a die head, so that the melt is cast into a thick sheet; sequentially carrying out longitudinal and transverse stretching and sizing on the thick sheet, so that a thin sheet is obtained; carrying out edge trimming, thickness measuring and aureoling on the thin sheet; spraying an antifogging agent on one surface of the thin sheet, wherein the content of the antifogging agent is 3-6% after being diluted by water, and the spraying amount is 3.0-4.3 ml/m<2>; and rolling, aging and slitting the thin sheet. According to the invention, in the process of sheet production, a reasonable amount of a diluted antifogging agent is sprayed on the surface of a sheet, so that the antifogging performance of the sheet is greatly improved, the antifogging grade can be as high as 5-grade, the sheet also can be completely transparent and has no formed fog after packaging food, therefore, the sheet meets the packaging requirements of special foods, and has a broad market prospect.
Description
Technical field
The present invention relates to technical field of polymer materials, relate in particular to a kind of high antifog polystyrene sheet material of Special food packing and biaxially oriented polystyrene sheet material and manufacture method thereof that manufacture method environmental protection can be used for printing thereof of being applicable to.
Background technology
Biaxially oriented polystyrene film is a kind of novel green wrapping material that development in recent years is got up, the polyethylene using compared with tradition, polyvinyl chloride film etc., it has that intensity is high, rigidity is large, nontoxicity, easily degraded, easy coloring, have good glossiness and transparency, the advantage such as easy to process, be widely used in all kinds of article if artwork, daily necessities, metal products are particularly in the packing of food.Current developed countries, as the biaxially oriented polystyrene film consumption of the U.S., Canada, Japan etc., oneself accounts for the more than 60% of all film classes.
But the anti-fog performance of common polystyrene material is poor, can not meet the packing demand of the more high Special food of temperature, thereby, need badly its production technique is improved.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of high antifog polystyrene sheet material and manufacture method thereof that is applicable to Special food packing, improves its anti-fog performance, the more high Special food packing of satisfied temperature demand.
For solving the problems of the technologies described above, the object of the invention is to be achieved through the following technical solutions.
A high antifog polystyrene sheet material that is applicable to Special food packing, its composition is (%) by weight ratio:
General Purpose Polystyrenre 90-95%;
K resin 5-10%.
A high antifog manufacture method that is applicable to the polystyrene sheet material of Special food packing as mentioned above, comprises step:
(1) the K resin of the General Purpose Polystyrenre of 90-95%9 and 5-10% is fully uniformly mixed resulting mixture by weight percentage;
(2) by described mixture by forcing machine through melt extruding;
(3) melts is sent into die head and extrude, cast sheet;
(4) sheet is first carried out to preheating on vertical drawing machine, carry out longitudinal stretching and sizing simultaneously; On horizontal drawing machine, carry out again preheating, carry out cross directional stretch and sizing simultaneously, obtain thin slice;
(5) described thin slice is carried out to deburring, thickness measuring, corona;
(6) one side at described thin slice sprays the antifogging agent that content is 3-6% after water dilution, and quantity for spray is 3.0-4.3ml/m
2;
(7) rolling, timeliness, cut processing.
Preferably, the quantity for spray of described antifogging agent is 2.0-2.5ml/m
2.
Preferably, described antifogging agent content after water dilution is 1-2%.
Preferably, between described step (1) and (2), also comprise step: described mixture is dropped into blower fan hopper, through roots blower, blow to moisture eliminator and carry out drying treatment.
Preferably, in described step (3), the mixture after by vacuum pump, drying being processed is drawn to the hopper of forcing machine.
Preferably, the preheating temperature of described vertical drawing machine is controlled between 50 ℃ to 150 ℃.
Preferably, the preheating temperature of described horizontal drawing machine is controlled between 100 ℃ to 150 ℃.
The present invention has following beneficial effect:
The present invention is in sheet production process, to the antifogging agent after the dilution of its surface spraying Rational Dosage, greatly improved the anti-fog performance of sheet material, antifog grade can be up to Pyatyi, can also be completely transparent after wrap food, without knot mist, met the packing demand of Special food, there are wide market outlook.
Accompanying drawing explanation
Fig. 1 is preparation method's schema of the polystyrene sheet material that provides of the embodiment of the present invention.
Embodiment
The antifog polystyrene sheet material that is applicable to Special food packing of height provided by the invention, its composition is (%): GPPS (General Purpose Polystyrenre) 90-95% by weight ratio; K resin 5-10%.
In the present invention, the complete processing of polystyrene sheet material as shown in Figure 1, comprising:
1, first take by weight ratio GPPS and K resin, mix; The raw material that mixes is dropped into hopper, through roots blower, blow to moisture eliminator and carry out drying treatment;
2, by vacuum pump, from moisture eliminator, extract the hopper that mixture is sent into forcing machine;
3, said mixture on forcing machine through melting, extrude, melt temperature is controlled between 180 ℃ to 250 ℃;
4, after filter filters out impurities, melts is sent into die head and extrude, cast sheet, in die head, temperature is controlled between 200 ℃ to 250 ℃;
5, sheet is carried out to preheating on vertical drawing machine, preheating temperature is controlled between 50 ℃ to 150 ℃, carries out longitudinal stretching and sizing simultaneously; The film obtaining is carried out on horizontal drawing machine to preheating, preheating temperature is controlled between 100 ℃ to 150 ℃, carries out cross directional stretch and sizing simultaneously again;
6, thin slice is carried out to deburring and thickness measuring, corona.
7, sheet material a roller coat silicone oil, one side are sprayed to antifogging agent.The quantity for spray of antifogging agent is 3.0-4.3ml/m
2, optimum is 2.0-2.5ml/m
2; Before spraying, need to be diluted with water to 3-6%, optimum is 1-2%.
8, rolling, the packing of product that was cut into required specification at parent roll through 48 hours after ageing treatment is dispatched from the factory.
For ease of the present invention is further understood, now describe the present invention in conjunction with specific embodiments:
In the present embodiment, polystyrene sheet material is mixed in container by weight GPPS92%, K resin 6%, drop into stub bar, through roots blower, dispel to moisture eliminator and carry out drying treatment.Afterwards, the material mixing is joined in the hopper of twin screw extruder, after melt blending, send into T-shaped die head and extrude sheet; Wherein, forcing machine processing temperature is 180 ℃-250 ℃, and die head temperature is 200 ℃-250 ℃.Then, to sheet carry out longitudinal stretching, cross directional stretch obtains thin slice, the preheating temperature of longitudinal stretching is 50 ℃, the preheating temperature of cross directional stretch is 100 ℃.Deburring thickness measuring, corona, painting silicone oil and antifogging agent, rolling, cut after ageing treatment and obtain a sample in order to performance test.
Material properties test data are in Table 1:
Table 1
In the present embodiment, the judgement criteria of antifog grade is:
Pyatyi: completely transparent, without knot mist;
Level Four: substantially transparent, but there is a small amount of water droplet;
Three grades: have larger water droplet to adhere to, but have suitable transparent feel;
Secondary: surface is covered with large water droplet, opaque;
One-level: surface is covered with little water droplet is completely opaque.
From above-mentioned the performance test results, apply raw material and the corresponding manufacture method of weight proportion of the present invention, the anti-fog performance of the polystyrene of producing is good, has greatly met the packing demand of Special food.
The biaxially oriented polystyrene sheet material and the manufacture method thereof that above environmental protection provided by the present invention be can be used for printing are described in detail, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (8)
1. a high antifog polystyrene sheet material that is applicable to Special food packing, is characterized in that, its composition is (%) by weight ratio:
General Purpose Polystyrenre 90-95%;
K resin 5-10%.
2. a high antifog manufacture method that is applicable to the polystyrene sheet material of Special food packing as claimed in claim 1, is characterized in that, comprises step:
(1) the K resin of the General Purpose Polystyrenre of 90-95%9 and 5-10% is fully uniformly mixed resulting mixture by weight percentage;
(2) by described mixture by forcing machine through melt extruding;
(3) melts is sent into die head and extrude, cast sheet;
(4) sheet is first carried out to preheating on vertical drawing machine, carry out longitudinal stretching and sizing simultaneously; On horizontal drawing machine, carry out again preheating, carry out cross directional stretch and sizing simultaneously, obtain thin slice;
(5) described thin slice is carried out to deburring, thickness measuring, corona;
(6) one side at described thin slice sprays the antifogging agent that content is 3-6% after water dilution, and quantity for spray is 3.0-4.3ml/m
2;
(7) rolling, timeliness, cut processing.
3. the manufacture method of polystyrene sheet material as claimed in claim 2, is characterized in that: the quantity for spray of described antifogging agent is 2.0-2.5ml/m
2.
4. the manufacture method of polystyrene sheet material as claimed in claim 2, is characterized in that: described antifogging agent content after water dilution is 1-2%.
5. the manufacture method of polystyrene sheet material as claimed in claim 2, is characterized in that: between described step (1) and (2), also comprise step: described mixture is dropped into blower fan hopper, through roots blower, blow to moisture eliminator and carry out drying treatment.
6. the manufacture method of polystyrene sheet material as claimed in claim 5, is characterized in that: in described step (3), the mixture after by vacuum pump, drying being processed is drawn to the hopper of forcing machine.
7. the manufacture method of polystyrene sheet material as claimed in claim 2, is characterized in that: the preheating temperature of described vertical drawing machine is controlled between 50 ℃ to 150 ℃.
8. the manufacture method of polystyrene sheet material as claimed in claim 2, is characterized in that: the preheating temperature of described horizontal drawing machine is controlled between 100 ℃ to 150 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410256486.5A CN104004285A (en) | 2014-06-10 | 2014-06-10 | High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410256486.5A CN104004285A (en) | 2014-06-10 | 2014-06-10 | High-antifogging polystyrene sheet suitable for special food packaging and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105860313A (en) * | 2016-05-19 | 2016-08-17 | 苏州马培德办公用品制造有限公司 | Composite material for plastic ruler and application of composite material |
| CN111303549A (en) * | 2020-04-07 | 2020-06-19 | 四川大学 | Preparation method of reinforced and toughened polystyrene and stretched film |
Citations (2)
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| CN102311589A (en) * | 2010-12-21 | 2012-01-11 | 深圳市科聚新材料有限公司 | Transparent K-resin/GPPS (general purpose polystyrene) alloy material and preparation method thereof |
| CN103030897A (en) * | 2012-12-14 | 2013-04-10 | 上海洛兴包装材料有限公司 | Anti-fog sheet and manufacturing method thereof |
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2014
- 2014-06-10 CN CN201410256486.5A patent/CN104004285A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102311589A (en) * | 2010-12-21 | 2012-01-11 | 深圳市科聚新材料有限公司 | Transparent K-resin/GPPS (general purpose polystyrene) alloy material and preparation method thereof |
| CN103030897A (en) * | 2012-12-14 | 2013-04-10 | 上海洛兴包装材料有限公司 | Anti-fog sheet and manufacturing method thereof |
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| 刘鹰: "双向拉伸透明抗静电聚苯乙烯片材的研制", 《包装世界》, no. 3, 30 June 2005 (2005-06-30) * |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105860313A (en) * | 2016-05-19 | 2016-08-17 | 苏州马培德办公用品制造有限公司 | Composite material for plastic ruler and application of composite material |
| CN111303549A (en) * | 2020-04-07 | 2020-06-19 | 四川大学 | Preparation method of reinforced and toughened polystyrene and stretched film |
| CN111303549B (en) * | 2020-04-07 | 2021-10-08 | 四川大学 | Preparation method of reinforced and toughened polystyrene and stretched film |
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Application publication date: 20140827 |