CN102358032A - Preparation method for even-orientation-degree organic glass - Google Patents
Preparation method for even-orientation-degree organic glass Download PDFInfo
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- CN102358032A CN102358032A CN2011102468578A CN201110246857A CN102358032A CN 102358032 A CN102358032 A CN 102358032A CN 2011102468578 A CN2011102468578 A CN 2011102468578A CN 201110246857 A CN201110246857 A CN 201110246857A CN 102358032 A CN102358032 A CN 102358032A
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Abstract
Provided is a preparation method for even-orientation-degree organic glass. A grinded organic glass pouring plate is extended through an X-axis and a Y-axis in 125 DEG C to 160 DEG C. The organic glass pouring plate is methyl methacrylate homopolymerization or copolymerization plate prepared by a body pouring method and contains plasticizers, cross-linking agents or other performance addictives. The organic glass can be grinded flash through grinding equipment including grinders or lapping machines, and the height of grinded flash materials is smaller than 0.3mm. Stretching orientation can be performed through an X-Y double axis oriented stretching machine, and uniformity of the inner temperature of a thermal insulation cavity of the organic glass is smaller than 3 DEG C. The uniformity of orientation degree of prepared oriented stretched organic glass is no larger than 3%.
Description
Technical field
The present invention relates to a kind of preparation method of oriented organo glass, especially prepare the method for the oriented organo glass of even degree of orientation.
Background technology
The plastic plate that methyl methacrylate is processed through the process route of body casting homopolymerization or copolymerization is called the lucite moulding plate, is commonly called as lucite.Lucite because of it has excellent optical performance, formability can be good and have certain mechanical property, and be widely used in aviation, boats and ships, automobile and building field.
Oriented organo glass is also referred to as lucite orientation stretching plate, is polymethyl methacrylate (PMMA is commonly called as lucite) moulding plate (general thickness is more than 12mm, more than the length and width size 1200mm) is made through X-Y is biaxial stretch-formed under suitable temperature.Drawing process is earlier to be warmed up to lucite softening temperature more than after with clamps methacrylate sheet four limits and to keep a period of time so that sheet material is fully softening; Four limit anchor clamps outwards stretch with certain speed then; The methacrylate sheet planar dimension is widened; Reduced thickness reaches cooling and shaping after the requirement size.Oriented organo glass under free state, be warmed up to the lucite softening temperature when above lucite can retract to stretch before size.
Through stretching lucite macromolecular chain segment structure is orientated along the X-Y draw direction; Thereby make the performance such as impact strength and toughness of lucite that raising by a relatively large margin all arranged, can be used for the moulding of field required high-performance lucite transparent configuration spares such as aviation.Degree of orientation is commonly referred to the lucite degree of orientation, generally adopts oriented organo glass more than draft temperature, to add thermoresilience front and back size changing rate and calculates.The oriented organo glass that is of a size of 2250mm such as length and width becomes length and width size 1500mm after adding thermoresilience, claim that generally the sheet material degree of orientation is (2250-1500)/1500=50%.
But because the thickness evenness of lucite moulding plate itself is relatively poor; Generally more than 0.5mm (be in the whole poly (methyl methacrylate) plate face the thinnest point and thickest point thickness difference greater than 0.5mm); The whole plate face degree of orientation of appearance was inhomogeneous after this will cause lucite to carry out orientation stretching; The general thickness difference is big more, and degree of orientation is more little; Otherwise thickness difference is more little, and degree of orientation is big more.Therefore methacrylate sheet thickness differs big more, and the back degree of orientation that stretches also differs big more, but the average orientation degree of sheet material is constant.The inhomogeneous meeting of whole plate face degree of orientation causes oriented organo glass sheet material macromolecule ordered state inhomogeneous and then cause that the oriented organo glass mechanical property is inhomogeneous, the optical property variation, finally influences the outward appearance and the optical quality of plate forming goods.
Summary of the invention
The purpose of this invention is to provide a kind of method for preparing even degree of orientation lucite.
The lucite moulding plate that the present invention uses is methyl methacrylate homopolymerization or the copolymerization sheet material through the preparation of body casting method.
The method of the even degree of orientation lucite of preparation of the present invention is: earlier lucite moulding plate surface is polished processing; Make after X-Y is biaxial stretch-formed at 125 ℃～160 ℃ then, any point-to-point transmission degree of orientation uniformity is no more than 3% behind the stretch orientation lucite trimming that obtains.
Said lucite moulding plate is methyl methacrylate homopolymerization or the copolymerization sheet material through the preparation of body casting method.
Can contain plasticizer or crosslinking agent or other modified additive in the said lucite moulding plate.
Lucite polishes equipment such as adopting grinder or grinding machine and grinds gained, and the thickness evenness that polishes back sheet material is not more than 0.3mm, reduces the thinnest point and thickest point thickness difference in the poly (methyl methacrylate) plate face.
Said stretch orientation adopts X-Y biaxial oriented stretch machine to carry out, and lucite insulation cavity internal temperature uniformity is not more than 3 ℃ in the drawing process.
The invention has the beneficial effects as follows:
Through with behind the lucite moulding plate surface rubbing, reduce the thinnest point and thickest point thickness difference in the poly (methyl methacrylate) plate face.The whole plate degree of orientation uniformity of orientation stretching lucite for preparing that stretches again is no more than 3%, thereby increases substantially the mechanical property uniformity and the optical property of stretching sheet material, can guarantee profiled member appearance and size.Traditional orientation stretching lucite preparation is the lucite moulding plate that adopts without grinding, and general degree of orientation uniformity is not less than 6%, is difficult to guarantee lucite profiled member appearance and size and stability.
Description of drawings
The specific embodiment
Embodiment 1:
Step 1: 1600 * 1600 * 20mm lucite moulding plate is placed on the grinder with 120
#Sand paper grinds 30min, with this sheet material turn-over, another side is ground 30min equally then, takes off, and with sonigauge sheet material measurement thickness, should try one's best to measure equably is no less than 81 points.
Step 2: sheet material is fixed on the anchor clamps of stretching-machine, under 125 ℃～160 ℃ conditions, carries out orientation stretching, guarantee in the drawing process that temperature uniformity is not more than 3 ℃ in the insulation cavity, the whole plate abduction elongation of lucite reaches 70% and stops.
Step 3: stretch after the completion, sheet material is cooled to room temperature, unload sheet material.300mm partly excises with its edge.Press sampling shown in the accompanying drawing 1, measure its degree of orientation.
Comparative Examples 2:
Operation is with instance 1, and difference is that only the lucite moulding plate being carried out single face polishes.
Comparative Examples 3:
Operation is with instance 1, and difference is the lucite moulding plate not to be polished.
The thickness evenness and the back degree of orientation that stretches before table 1 instance 1～3 lucite moulding plate stretches
Claims (5)
1. the preparation method of an even degree of orientation lucite; It is characterized in that; Earlier lucite moulding plate surface is polished processing, make after X-Y is biaxial stretch-formed at 125 ℃～160 ℃ then, any point-to-point transmission degree of orientation uniformity is no more than 3% behind the stretch orientation lucite trimming that obtains.
2. preparation method as claimed in claim 1 is characterized in that, said lucite moulding plate is methyl methacrylate homopolymerization or the copolymerization sheet material through the preparation of body casting method.
3. according to claim 1 or claim 2 preparation method is characterized in that, can contain plasticizer or crosslinking agent or other modified additive in the said lucite moulding plate.
4. preparation method as claimed in claim 1 is characterized in that, lucite polishes equipment such as adopting grinder or grinding machine and grinds gained, and the thickness evenness that polishes back sheet material is not more than 0.3mm.
5. preparation method as claimed in claim 1 is characterized in that, said stretch orientation adopts X-Y biaxial oriented stretch machine to carry out, and lucite insulation cavity internal temperature uniformity is not more than 3 ℃ in the drawing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110246857.8A CN102358032B (en) | 2011-08-25 | 2011-08-25 | Preparation method for even-orientation-degree organic glass |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110246857.8A CN102358032B (en) | 2011-08-25 | 2011-08-25 | Preparation method for even-orientation-degree organic glass |
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| CN102358032A true CN102358032A (en) | 2012-02-22 |
| CN102358032B CN102358032B (en) | 2014-04-16 |
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| CN201110246857.8A Active CN102358032B (en) | 2011-08-25 | 2011-08-25 | Preparation method for even-orientation-degree organic glass |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109575169A (en) * | 2018-12-19 | 2019-04-05 | 锦西化工研究院有限公司 | A method of applying film preparation special type aerial organic glass |
| CN110177827A (en) * | 2017-01-27 | 2019-08-27 | 住友化学株式会社 | Formed body and its manufacturing method |
| CN111633968A (en) * | 2020-06-03 | 2020-09-08 | 沈阳工业大学 | Large-scale aircraft glass heat preservation stretching device |
| CN112537016A (en) * | 2020-11-26 | 2021-03-23 | 锦西化工研究院有限公司 | Method for improving stretching efficiency of organic glass sheet (less than or equal to 20mm) |
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| JPH0770415A (en) * | 1993-09-07 | 1995-03-14 | Diafoil Co Ltd | Biaxially oriented polyester film |
| JP2005014545A (en) * | 2003-06-30 | 2005-01-20 | Mitsubishi Polyester Film Copp | Polyester film for mold release film |
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Patent Citations (2)
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| JPH0770415A (en) * | 1993-09-07 | 1995-03-14 | Diafoil Co Ltd | Biaxially oriented polyester film |
| JP2005014545A (en) * | 2003-06-30 | 2005-01-20 | Mitsubishi Polyester Film Copp | Polyester film for mold release film |
Non-Patent Citations (4)
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| 朱子华: "双轴拉伸定向有机玻璃的定向度均匀性的研究", 《材料工程》, no. 3, 2 March 1993 (1993-03-02), pages 42 - 44 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110177827A (en) * | 2017-01-27 | 2019-08-27 | 住友化学株式会社 | Formed body and its manufacturing method |
| US11254813B2 (en) | 2017-01-27 | 2022-02-22 | Sumitomo Chemical Company, Limited | Molded article and method of producing the same |
| CN110177827B (en) * | 2017-01-27 | 2022-05-03 | 住友化学株式会社 | Molded article and method for producing same |
| CN109575169A (en) * | 2018-12-19 | 2019-04-05 | 锦西化工研究院有限公司 | A method of applying film preparation special type aerial organic glass |
| CN109575169B (en) * | 2018-12-19 | 2021-03-19 | 锦西化工研究院有限公司 | Method for preparing special aviation organic glass by coating |
| CN111633968A (en) * | 2020-06-03 | 2020-09-08 | 沈阳工业大学 | Large-scale aircraft glass heat preservation stretching device |
| CN112537016A (en) * | 2020-11-26 | 2021-03-23 | 锦西化工研究院有限公司 | Method for improving stretching efficiency of organic glass sheet (less than or equal to 20mm) |
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| CN102358032B (en) | 2014-04-16 |
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Owner name: JINXI RESEARCH INSTITUTE OF CHEMICAL INDUSTRY CO., Free format text: FORMER NAME: JINXI CHEMICAL RESEARCH INSTITUTE |
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Inventor after: Wang Baojun Inventor after: Liu Daguang Inventor after: Zhu Zihua Inventor after: Hou Chaojun Inventor after: Wang Dayong Inventor after: Xu Lixin Inventor before: Wang Baojun Inventor before: Liu Daguang Inventor before: Zhu Zihua Inventor before: Hou Chaojun Inventor before: Wang Dayong |
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Address after: 125000 No. 146, No. seven, hi tech Road, Longgang District, Liaoning, Huludao Patentee after: Jinxi Research Institute of Chemical Industry Co., Ltd. Address before: 125000 No. 146, No. seven, hi tech Road, Longgang District, Liaoning, Huludao Patentee before: Jinxi Research Institute of Chemical Industry |