Poly-lactic-acid composition and formed body thereby and method for making said formed body

A manufacturing method and technology of polylactic acid, which are applied in chemical instruments and methods, cellulose plastic material layered products, layered products, etc., can solve the problem of non-conforming molding cycle, opaque heat resistance, and non-conforming productivity to industrial needs, etc. problem, to achieve the effect of shortening the forming cycle

Inactive Publication Date: 2007-11-14
FAR EASTERN NEW CENTURY COPRRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, according to the examples described in the specification of this case, the molding cycle (crystallization time) obviously cannot be shortened to less than 2 minutes, which still does not meet the industrial needs from the viewpoint of productivity.
[0013] To sum up, among the currently known polylactic acid moldings, those with transparency are not heat-resistant, while those with heat resistance are opaque. As for molded products containing amide compounds, although they are heat-resistant and transparent, their molding cycle has not yet met the needs of the industry for mass production. Therefore, how to obtain heat-resistant, transparent and shorter molding products? Periodic polylactic acid molded body is still a problem to be solved

Method used

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  • Poly-lactic-acid composition and formed body thereby and method for making said formed body
  • Poly-lactic-acid composition and formed body thereby and method for making said formed body
  • Poly-lactic-acid composition and formed body thereby and method for making said formed body

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A

[0044] A total of 200 kg of polylactic acid and biodegradable polytetramethylene glycol adipate blend (the composition ratio is shown in Table 1) was supplied to a twin-screw extruder, and then extruded through melt mixing (dispersive mixing) After being bundled, it is cut into granules by a granulator. The operating conditions of the twin-screw extruder are: screw length-to-width ratio L / D=32, screw speed 200rpm, temperature distribution of the screw 190°C, 195°C, 195°C, 195°C, 190°C, die temperature 190°C.

[0045] After the pellets were dried at 70°C for 12 hours, they were supplied to a single-screw extruder and extruded from a T-shaped die to form a sheet with a thickness of 0.4 mm. At this time, the crystallinity of the sheet was 0%. Next, using a forming die with a width of 90 mm, a depth of 75 mm, and a draw ratio of 2.6, vacuum forming (vacuum degree: -70 cmHg) or pressure forming (pressure: 5 Kg) of the sheet was carried out at a mold temperature of 120° C. to obtai...

Embodiment B

[0050] The implementation steps of Example B are roughly the same as Example A, the difference is that the biodegradable polytetramethylene adipate of Example A is biodegradable polytetramethylene adipate / terephthalate "FEPOL2040 ” instead, its composition ratio is shown in Table 3, and the relevant physical property analysis is also recorded in Table 3.

Embodiment C

[0051] Example C, D, E

[0052] The implementation steps of Examples C, D, and E are roughly the same as those of Example A, except that the biodegradable polytetramethylene glycol adipate, respectively polytetramethylene glycol adipate / terephthalate "Ecoflex", polytetramethylene glycol adipate Butanediol succinate / terephthalate "Biomax", and polyethylene glycol substitution, the composition ratio is shown in Table 4, and the relevant physical property analysis is also recorded in Table 4.

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Abstract

The invention discloses a combination of polylactic acid, it can be used to produce a heat-resistant, transparent and health decomposition of the body-forming and can significantly shorten the cycle. The combination of polylactic acid was added to the total weight of the combination of 0.1 to 10 percent and selected at least one from aliphatic polyester, aliphatic - a total of aromatic polyester and polyethylene glycol decomposition of Health polymer, it can use as the crystallization of the nucleating agent.

Description

technical field [0001] The present invention relates to a polylactic acid composition, in particular to a polylactic acid composition which has the advantages of short molding cycle and is used to manufacture molded bodies with heat resistance, transparency and biodegradability. Background technique [0002] Plastic products are widely used in various daily necessities, such as packaging materials, food containers, cleaning supplies containers, various daily necessities, etc. . [0003] However, affected by the low price of plastic materials and the convenience of easy acquisition, most plastic products are not reused, especially food packaging often results in a large amount of plastic waste, and such plastic materials have stable chemical properties. It cannot be decomposed in the natural environment, making the disposal of plastic waste a major problem. [0004] The current methods of dealing with plastic waste can be roughly divided into three types: incineration, land...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/04C08J5/18C08J7/00B29C47/40B32B23/06C08L67/02
Inventor 周名泽张莉苓吴汝瑜
Owner FAR EASTERN NEW CENTURY COPRRATION
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