CN102626984A - Hot mould forming method for polylactic acid - Google Patents
Hot mould forming method for polylactic acid Download PDFInfo
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- CN102626984A CN102626984A CN2012101145206A CN201210114520A CN102626984A CN 102626984 A CN102626984 A CN 102626984A CN 2012101145206 A CN2012101145206 A CN 2012101145206A CN 201210114520 A CN201210114520 A CN 201210114520A CN 102626984 A CN102626984 A CN 102626984A
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- mould
- polylactic acid
- forming method
- hot
- pla
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Abstract
The invention discloses a hot mould forming method for polylactic acid. A forming mould is adopted in the hot mould forming method. The hot mould forming method comprises the following steps of: (1) spraying an anti-sticking coating on the inner surface of the forming mould; and (2) putting raw materials into the forming mould to realize hot mould forming so as to obtain a polylactic acid product, wherein the anti-sticking coating is a Teflon layer, and nano spraying is used as the spraying method of the anti-sticking coating. According to the hot mould forming method, the sticking problem of the polylactic acid to the inner side of the mould at high temperature can be effectively solved; and the crystallinity degree of the polylactic acid product reaches 20-30 percent, and the heat-resistance temperature of the polylactic acid product is higher than 90 DEG C, so that the polylactic acid material can be widely applied, and carbon emission is reduced so as to protect the environment.
Description
Technical field
The present invention relates to a kind of production method of PLA, be specifically related to a kind of hot-die forming method of PLA.
Background technology
PLA (PLA) technology is to be raw material with natural plants such as corn, cassavas, after fermentation emulsification, adopts polymerization technique, forms the macromolecular material with degradable function, and its product can extensively substitute the conventional plastic goods that petroleum base is a raw material.
At present; PLA hot-die forming mould adopts alloy to process, when being the PLA mold, and can not be too high to the temperature of PLA heating; If too high meeting causes PLA to stick to the inner surface of mould; Cause the product can not moulding, promptly do not reach higher degree of crystallinity at a higher temperature constant state, this makes the poly-lactic acid products of moulding can not reach resistant to elevated temperatures state.
Because the shortcoming of polylactic acid article is thermo-labile (heat resisting temperature has only about 70 ℃), therefore existing PLA finished product can only be used to make low temperature resistant product.
Summary of the invention
Technical problem to be solved by this invention provides a kind of hot-die forming method of PLA, and it can solve the thermo-labile problem difficult with the demoulding after PLA (PLA) sheet forming.
For solving the problems of the technologies described above, the technical solution of the hot-die forming method of PLA of the present invention is:
Adopt mould, may further comprise the steps:
The first step is to the inner surface spraying anti-stick coating of mould;
Second step made raw material get into mould and realizes the hot-die moulding, obtained polylactic acid article.
Said anti-stick coating is the Teflon layer.
The spraying method of said anti-stick coating is a nano-spray.
The technique effect that the present invention can reach is:
PLA was to the inboard sticking problem of its mould when the present invention can effectively solve high temperature.
The present invention can access degree of crystallinity and reach 20～30%, and heat resisting temperature is the polylactic acid article more than 90 ℃, and poly-lactic acid material is more widely used, and reduces carbon emission, the protection environment.
The specific embodiment
The hot-die forming method of PLA of the present invention adopts mould, may further comprise the steps:
The first step is to the inner surface spraying anti-stick coating of mould;
Second step made raw material get into mould and realizes the hot-die moulding, obtained polylactic acid article.
Anti-stick coating can be the Teflon layer that forms through nano-spray, thereby can effectively solve under the high temperature PLA to the sticking problem of mould inner surface.
Because poly-lactic acid products is when the production moulding, mould is in the condition of high temperature always, so product can not get cooling off easy deformation when the demoulding.The present invention is through in mould surface spraying Teflon or other adherent surfaces coatings, adopts nano-spray to make the inner surface of the mould Teflon that evenly distributes, and PLA is to the inboard sticking problem of its mould in the time of can effectively solving high temperature.
Claims (3)
1. the hot-die forming method of a PLA is characterized in that: adopt mould, may further comprise the steps:
The first step is to the inner surface spraying anti-stick coating of mould;
Second step made raw material get into mould and realizes the hot-die moulding, obtained polylactic acid article.
2. the hot-die forming method of PLA according to claim 1, it is characterized in that: said anti-stick coating is the Teflon layer.
3. the hot-die forming method of PLA according to claim 1, it is characterized in that: the spraying method of said anti-stick coating is a nano-spray.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101145206A CN102626984A (en) | 2012-04-19 | 2012-04-19 | Hot mould forming method for polylactic acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101145206A CN102626984A (en) | 2012-04-19 | 2012-04-19 | Hot mould forming method for polylactic acid |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102626984A true CN102626984A (en) | 2012-08-08 |
Family
ID=46585463
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101145206A Pending CN102626984A (en) | 2012-04-19 | 2012-04-19 | Hot mould forming method for polylactic acid |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102626984A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111136839A (en) * | 2018-11-02 | 2020-05-12 | 佛山市顺德区美的电热电器制造有限公司 | Mold and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202088365U (en) * | 2011-06-13 | 2011-12-28 | 湖北三江航天江河橡塑有限公司 | Casting mold for producing polyurethane product with special profile |
-
2012
- 2012-04-19 CN CN2012101145206A patent/CN102626984A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202088365U (en) * | 2011-06-13 | 2011-12-28 | 湖北三江航天江河橡塑有限公司 | Casting mold for producing polyurethane product with special profile |
Non-Patent Citations (1)
| Title |
|---|
| 黄进等: "《生物质化工与生物质材料 》", 31 August 2009, 化学工业出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111136839A (en) * | 2018-11-02 | 2020-05-12 | 佛山市顺德区美的电热电器制造有限公司 | Mold and preparation method thereof |
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Application publication date: 20120808 |