CN102250455A - Polylactic acid (PLA) ventilated film and its preparation technology - Google Patents
Polylactic acid (PLA) ventilated film and its preparation technology Download PDFInfo
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- CN102250455A CN102250455A CN2011101520353A CN201110152035A CN102250455A CN 102250455 A CN102250455 A CN 102250455A CN 2011101520353 A CN2011101520353 A CN 2011101520353A CN 201110152035 A CN201110152035 A CN 201110152035A CN 102250455 A CN102250455 A CN 102250455A
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Abstract
A polylactic acid (PLA) ventilated film and its preparation technology. Raw materials of the polylactic acid (PLA) ventilated film comprise 40-60% of polylactic acid (PLA), 60-40% of calcium carbonate (CaCo3) and 1-10% of other auxiliary agents. The preparation technology provided by the invention comprises two-step method of carrying mixing, melting and granulation on the above raw materials by a granulation device and completing film preparation and processing by a tape casting ventilating device; or one-step method of completing mixing, melting, film preparation, stretching and the like by the tape casting device in one process. The ventilated film prepared by using polylactic acid (PLA) as the main preparation raw material of the ventilated film can be completely degraded in the natural environment. Renewable raw materials are utilized to save energy and protect environment.
Description
[technical field]
The present invention relates to a kind of air-permeating film and preparation technology thereof, be specifically related to the water-resisting layer (counterdie) of a kind of baby of being applied to and adult diaper/diaper/urine pad etc.; The water-resisting layer of women's physiological nursing materials such as sanitary towel, protection pad etc. (counterdie); The water-resisting layer (notacoria) of medical treatment and nursing towel/nursing pad etc.; The sealing coat of disposable surgical clothing, protective clothing etc.; The fresh-keeping inside and outside packing of vegetable dish, fruit etc.Poly(lactic acid) (PLA) air-permeating film and preparation technology thereof.
[background technology]
Present employed PE air-permeating film is the PE raw material as carrier, and lime carbonate is as additive, and mixed melting and film forming again through unidirectional or two-way stretching, can become ventilative (air, moisture etc.) waterproof (liquid, dust etc.) functional material.
Employed PE family macromolecule material belongs to by fossil feedstock and extracts and make through synthetic, and not only the source is more and more rare, and its discard in physical environment tens so that hundreds of years non-degradable, become very serious environmental and pollute.
[summary of the invention]
For solving above deficiency, the invention provides a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof, the employed poly(lactic acid) of present technique (PLA) is a kind of novel biodegradable material, and it uses the starch material that reproducible plant resources (as corn and millet bar) is contained to make.Starch material is made lactic acid via fermenting process, converts poly(lactic acid) to by chemosynthesis again.It has good biodegradability, can be degraded fully by the occurring in nature microorganism after the use, finally generates carbonic acid gas and water, directly enter the soil organism or, can not enter in the air, can not cause Greenhouse effect by plant absorbing, simultaneously, also be reproducible recycled material.
The technical solution adopted in the present invention is: a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that its raw material is poly(lactic acid) (PLA) 40-60%, lime carbonate (CaCO
3) 60-40%, other auxiliary agent 1-10%; With above-mentioned raw material by granulating equipment mix, fusion and granulation, and then have the ventilative equipment of curtain coating to finish system film processing (two step method); Can also mixing on casting apparatus, the steps such as fusion, system film, stretching finish (single stage method).
Described a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that described lime carbonate is 0.2-8um, and auxiliary agent mainly contains lubricant, oxidation inhibitor, colorant.
Described a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that described granulating equipment can be single screw rod or twin screw, and adopt modes such as underwater cutpellet, air-cooled pelletizing or tie rod pelletizing; Casting apparatus can also be single screw rod or twin screw, and simultaneously, the film microcosmic can be the single layer structure of separate unit forcing machine, can also be the multilayered structure of two or two above forcing machine configurations.
Described a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that described granulation process temperature is 120-200 degree centigrade; The casting technique temperature is 120-230 degree centigrade; The drawing process temperature is 10-100 degree centigrade, and stretch ratio is 1.5-5 times.
Described a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that described stretching mode comprises unilateral stretching, two-way stretch or local elongation.
Described a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that the salient features of described air-permeating film: WVTR500-20000g/M
2.24h; Basic weight 13-50gsm; The DM tensile strength is greater than 5N/inch, and elongation is greater than 20%; The CD tensile strength is greater than 3N/inch, and elongation is greater than 50%.
Beneficial effect of the present invention: poly(lactic acid) (PLA) is mainly prepared air-permeating film that raw material forms as air-permeating film can degraded fully under physical environment, uses the energy-conserving and environment-protective of recyclability raw material.
Further understand feature of the present invention and technology contents for making, see embodiment of the present invention for details, yet institute's embodiment formula is only for reference and explanation usefulness, and the present invention is limited.
[embodiment]
Embodiment elaborates to the present invention below in conjunction with body:
Embodiment 1, and a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that its raw material is a poly(lactic acid) (PLA) 40%, lime carbonate (CaCO
3) 50-59%, other auxiliary agent 1-10%; Lime carbonate is 0.2-8um, auxiliary agent mainly contains lubricant, oxidation inhibitor, colorant, with above-mentioned raw material by granulating equipment mix, fusion and granulation, granulating equipment can be single screw rod or twin screw, and adopts modes such as underwater cutpellet, air-cooled pelletizing or tie rod pelletizing; Casting apparatus can also be single screw rod or twin screw, and simultaneously, the film microcosmic can be the single layer structure of separate unit forcing machine, can also be the multilayered structure of two or two above forcing machine configurations; And then there is the ventilative equipment of curtain coating to finish system film processing (two step method); Can also mixing on casting apparatus, fusion, system film, stretching, stretching mode comprises that a step such as unilateral stretching, two-way stretch or local elongation finishes (single stage method).The granulation process temperature is 120-200 degree centigrade; The casting technique temperature is 120-230 degree centigrade; The drawing process temperature is 10-100 degree centigrade, and stretch ratio is 1.5-5 times.The salient features of air-permeating film: WVTR500-20000g/M
2.24h; Basic weight 13-50gsm; The DM tensile strength is greater than 5N/inch, and elongation is greater than 20%; The CD tensile strength is greater than 3N/inch, and elongation is greater than 50%.
Embodiment 2, and a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that its raw material is a poly(lactic acid) (PLA) 50%, lime carbonate (CaCO
3) 40-49%, other auxiliary agent 1-10%; Lime carbonate is 0.2-8um, auxiliary agent mainly contains lubricant, oxidation inhibitor, colorant, with above-mentioned raw material by granulating equipment mix, fusion and granulation, granulating equipment can be single screw rod or twin screw, and adopts modes such as underwater cutpellet, air-cooled pelletizing or tie rod pelletizing; Casting apparatus can also be single screw rod or twin screw, and simultaneously, the film microcosmic can be the single layer structure of separate unit forcing machine, can also be the multilayered structure of two or two above forcing machine configurations; And then there is the ventilative equipment of curtain coating to finish system film processing (two step method); Can also mixing on casting apparatus, fusion, system film, stretching, stretching mode comprises that a step such as unilateral stretching, two-way stretch or local elongation finishes (single stage method).The granulation process temperature is 120-200 degree centigrade; The casting technique temperature is 120-230 degree centigrade; The drawing process temperature is 10-100 degree centigrade, and stretch ratio is 1.5-5 times.The salient features of air-permeating film: WVTR500-20000g/M
2.24h; Basic weight 13-50gsm; The DM tensile strength is greater than 5N/inch, and elongation is greater than 20%; The CD tensile strength is greater than 3N/inch, and elongation is greater than 50%.
Embodiment 3, and a kind of poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that its raw material is a poly(lactic acid) (PLA) 59%, lime carbonate (CaCO
3) 40%, other auxiliary agent 1%; Lime carbonate is 0.2-8um, auxiliary agent mainly contains lubricant, oxidation inhibitor, colorant, with above-mentioned raw material by granulating equipment mix, fusion and granulation, granulating equipment can be single screw rod or twin screw, and adopts modes such as underwater cutpellet, air-cooled pelletizing or tie rod pelletizing; Casting apparatus can also be single screw rod or twin screw, and simultaneously, the film microcosmic can be the single layer structure of separate unit forcing machine, can also be the multilayered structure of two or two above forcing machine configurations; And then there is the ventilative equipment of curtain coating to finish system film processing (two step method); Can also mixing on casting apparatus, fusion, system film, stretching, stretching mode comprises that a step such as unilateral stretching, two-way stretch or local elongation finishes (single stage method).The granulation process temperature is 120-200 degree centigrade; The casting technique temperature is 120-230 degree centigrade; The drawing process temperature is 10-100 degree centigrade, and stretch ratio is 1.5-5 times.The salient features of air-permeating film: WVTR500-20000g/M2.24h; Basic weight 13-50gsm; The DM tensile strength is greater than 5N/inch, and elongation is greater than 20%; The CD tensile strength is greater than 3N/inch, and elongation is greater than 50%
Poly(lactic acid) (PLA) is mainly prepared air-permeating film that raw material forms as air-permeating film can degraded fully under physical environment, uses the energy-conserving and environment-protective of recyclability raw material, and it is applied to the water-resisting layer (counterdie) that baby and adult diaper/diaper/urine fill up etc.; The water-resisting layer of women's physiological nursing materials such as sanitary towel, protection pad etc. (counterdie); The water-resisting layer (notacoria) of medical treatment and nursing towel/nursing pad etc.; The sealing coat of disposable surgical clothing, protective clothing etc.; The fresh-keeping inside and outside packing of vegetable dish, fruit etc.
Yet the preferable feasible embodiment of above-mentioned only the present invention, non-so limitation protection domain of the present invention is done various distortion or is applied mechanically all within this technical scheme protection domain according to the foregoing description.
Claims (5)
1. poly(lactic acid) (PLA) air-permeating film and preparation technology thereof is characterized in that its raw material is poly(lactic acid) (PLA) 40-60%, lime carbonate (CaCO
3) 60-40%, other auxiliary agent 1-10%; With above-mentioned raw material by granulating equipment mix, fusion and granulation, and then have the ventilative equipment of curtain coating to finish system film processing (two step method); Can also mixing on casting apparatus, the steps such as fusion, system film, stretching finish (single stage method).
2. a kind of poly(lactic acid) (PLA) air-permeating film according to claim 1 and preparation technology thereof is characterized in that described lime carbonate is 0.2-8um, and auxiliary agent mainly contains lubricant, oxidation inhibitor, colorant.
3. a kind of poly(lactic acid) (PLA) air-permeating film according to claim 1 and preparation technology thereof is characterized in that described granulating equipment can be single screw rod or twin screw, and adopt modes such as underwater cutpellet, air-cooled pelletizing or tie rod pelletizing; Casting apparatus can also be single screw rod or twin screw, and simultaneously, the film microcosmic can be the single layer structure of separate unit forcing machine, can also be the multilayered structure of two or two above forcing machine configurations.
4. a kind of poly(lactic acid) (PLA) air-permeating film according to claim 1 and preparation technology thereof is characterized in that described granulation process temperature is 120-200 degree centigrade; The casting technique temperature is 120-230 degree centigrade; The drawing process temperature is 10-100 degree centigrade, and stretch ratio is 1.5-5 times.
5. a kind of poly(lactic acid) (PLA) air-permeating film according to claim 1 and preparation technology thereof is characterized in that described stretching mode comprises unilateral stretching, two-way stretch or local elongation.
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Cited By (6)
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|---|---|---|---|---|
| CN104552972A (en) * | 2015-01-13 | 2015-04-29 | 浙江三星塑胶有限公司 | Two-way stretching polylactic acid membrane device |
| CN107083033A (en) * | 2017-06-09 | 2017-08-22 | 怡佳（福建）卫生用品有限公司 | Biodegradable ventilated membrane for paper diaper and preparation method thereof |
| CN108659491A (en) * | 2018-06-07 | 2018-10-16 | 中国科学院长春应用化学研究所 | A kind of lactic acid composite material of activeness and quietness and preparation method thereof |
| WO2022003150A1 (en) | 2020-07-03 | 2022-01-06 | Omya International Ag | Low noise biodegradable breathable films |
| CN114773644A (en) * | 2022-04-26 | 2022-07-22 | 四川大学 | Polylactic acid porous film with low dielectric constant and high toughness and preparation method thereof |
| CN115782342A (en) * | 2022-11-29 | 2023-03-14 | 东莞市悠悠美居家居制造有限公司 | Degradable breathable shower curtain and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104552972A (en) * | 2015-01-13 | 2015-04-29 | 浙江三星塑胶有限公司 | Two-way stretching polylactic acid membrane device |
| CN104552972B (en) * | 2015-01-13 | 2017-02-22 | 浙江三星塑胶有限公司 | Two-way stretching polylactic acid membrane device |
| CN107083033A (en) * | 2017-06-09 | 2017-08-22 | 怡佳（福建）卫生用品有限公司 | Biodegradable ventilated membrane for paper diaper and preparation method thereof |
| CN107083033B (en) * | 2017-06-09 | 2019-06-07 | 怡佳（福建）卫生用品有限公司 | Biodegradable ventilated membrane and preparation method thereof for paper diaper |
| CN108659491A (en) * | 2018-06-07 | 2018-10-16 | 中国科学院长春应用化学研究所 | A kind of lactic acid composite material of activeness and quietness and preparation method thereof |
| WO2022003150A1 (en) | 2020-07-03 | 2022-01-06 | Omya International Ag | Low noise biodegradable breathable films |
| CN114773644A (en) * | 2022-04-26 | 2022-07-22 | 四川大学 | Polylactic acid porous film with low dielectric constant and high toughness and preparation method thereof |
| CN114773644B (en) * | 2022-04-26 | 2023-08-15 | 四川大学 | Polylactic acid porous film with low dielectric constant and high toughness and preparation method thereof |
| CN115782342A (en) * | 2022-11-29 | 2023-03-14 | 东莞市悠悠美居家居制造有限公司 | Degradable breathable shower curtain and preparation method thereof |
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Application publication date: 20111123 |