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Antibacterial mouldproof biaxially oriented polylactic film and preparation method thereof

A biaxially stretched, antibacterial and anti-mildew technology, which is applied in the field of polylactic acid film, can solve the problems of weak anti-mold performance and poor water resistance, and achieve the effects of not easy to yellow and discoloration, high transparency, and good anti-bacterial and anti-mold effects

Active Publication Date: 2013-09-25
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In order to solve the problems faced in the prior art, the invention provides a kind of antibacterial and mildew-proof biaxially stretched polylactic acid film based on guanidinium salt polymer and its preparation method, which overcomes the poor water resistance and mildew resistance of common guanidinium salt polymers. Weakness, the prepared antibacterial and anti-mold polylactic acid has good sterilization and anti-mold effects and strong water resistance

Method used

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  • Antibacterial mouldproof biaxially oriented polylactic film and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] Weigh 21.0g (0.098mol) of polyhexamethylene guanidine propionate (Shanghai Gaoju F3000), add it to 200mL deionized water solution, stir to dissolve it; weigh another sodium pyrithione (Hangzhou Wanjing NPT) Add 20.0g (0.134mol) into 200mL deionized water, stir to dissolve; at room temperature (about 25°C), slowly pour polyhexamethylene guanidine propionate into the aqueous solution of sodium pyrithione, And keep stirring, after the mixing is complete, then fully stir for 20 minutes, dry and pulverize the product to obtain a completely substituted polyhexamethyleneguanidine pyrithione salt (antibacterial and antifungal agent 1#).

Embodiment 2

[0060] Weigh 20g (0.091mol) of polyhexamethylene biguanide hydrochloride (Shanghai Shande Industrial Co., Ltd. PHMB), add it to 200mL aqueous solution, stir to dissolve it; weigh another sodium pyrithione (Hangzhou Wanjing NPT) Add 35.0g (0.235mol) into 200mL of water, stir to dissolve; at 40°C, slowly pour polyhexamethylene biguanide hydrochloride into the aqueous solution of sodium pyrithione, and keep stirring to mix completely Afterwards, fully stir for another 20 minutes, dry and pulverize the product to obtain a completely substituted polyhexamethylene biguanide pyrithione (antibacterial and antifungal agent 2#).

Embodiment 3

[0062] Weigh 21.0g (0.133mol) of polyhexamethyleneguanidine hydrochloride (Shanghai Gaoju F1000), add it to 200mL aqueous solution, stir to dissolve it; and weigh 12.0g sodium pyrithione (Hangzhou Wanjing NPT) (0.080mol), added to 50mL water, stirred to dissolve; at room temperature (about 25°C), slowly pour the aqueous solution of sodium pyrithione into the polyhexamethyleneguanidine hydrochloride solution, and continuously Stir, after the mixing is complete, stir fully for another 20 minutes, dry and pulverize the product to obtain partially substituted polyhexamethyleneguanidine pyrithione salt (antibacterial and antifungal agent 3#).

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Abstract

The invention discloses an antibacterial mouldproof biaxially oriented polylactic film and a preparation method thereof. Based on 100 weight parts of biaxially oriented polylactic film special material, the polylactic film comprises the following blended components: 0.4 to 3 weight parts of antibacterial and mouldproof agent and 0 to 0.5 weight parts of dispersing agent; the film is prepared by a biaxial tension method and has the thickness of 10-100 mu m; and the antibacterial and mouldproof agent is a polyguanidine pyrithione antibacterial and moldproof agent, is prepared by mixing water-soluble polyguanidine inorganic acid salt or organic acid salt and sodium pyrithione in a molar ratio of 1:(0.1-5). The polylactic film has a good antibacterial and mouldproof effect, has the antibacterial effect of 99.9 percent on staphylococcus aureus and Escherichia coli, has the mouldproof grade of 0 for moulds such as aspergillus niger, aspergillus terreus, Paecilomyces variotii and the like, and has high water resistance and wide application prospect.

Description

technical field [0001] The invention relates to a polylactic acid film, and more specifically, the invention relates to a biodegradable antibacterial and mildew-proof polylactic acid film and a preparation method thereof. Background technique [0002] Polylactic acid is a polymer obtained by producing lactic acid from starch obtained from corn, taro, etc. as a raw material, and further chemically synthesizing it. With the continuous improvement of people's awareness of environmental protection, major scientific research and companies in the world have increased investment in the research and production of polylactic acid (PLA), and the application fields of polylactic acid have become increasingly extensive, including daily necessities, packaging materials, fiber textiles Foam materials, etc. [0003] Due to its special processing technology, the biaxially oriented polylactic acid (BOPLA) makes the polylactic acid stretched in the transverse and longitudinal directions duri...

Claims

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Application Information

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IPC IPC(8): C08L67/04C08L79/00B29C55/12
Inventor 李杰刘涛邵静波邹浩杨庆泉赵国安张师军
Owner CHINA PETROLEUM & CHEM CORP
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