Unlock instant, AI-driven research and patent intelligence for your innovation.

High-strength polylactic acid melt-blown fiber as well as preparation method and application thereof

A technology of melt-blown fiber and polylactic acid, applied in the field of non-woven fabrics, can solve the problems of reduced production efficiency, low strength, insufficient strength improvement, etc., and achieves improved bonding strength, improved bonding strength, and good self-heating bonding effect. Effect

Pending Publication Date: 2022-04-15
GUANGDONG KINGFA TECH CO LTD +1
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the use of polylactic acid as a raw material to prepare melt-blown non-manufacturing cloth has become the focus and hotspot of research. However, the self-adhesive performance of polylactic acid melt-blown cloth prepared in the industry is poor, resulting in low strength, and industrial applications are greatly restricted.
[0004] For example, the Chinese patent (CN104711764A) discloses a high-strength long-lasting electret ultra-fine fiber PLA melt-blown nonwoven material, which uses quaternary ammonium salt-modified nano-inorganic particles to enhance and modify PLA, and the melt-blown cloth has better Strength, but due to the addition of a large amount of inorganic rigid particles, it is easy to cause spinneret blockage, which is not suitable for long-term production, reduces production efficiency, and limits its use, and the addition of inorganic rigid particles reduces the compatibility of polylactic acid, resulting in a strong increase insufficient

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • High-strength polylactic acid melt-blown fiber as well as preparation method and application thereof
  • High-strength polylactic acid melt-blown fiber as well as preparation method and application thereof
  • High-strength polylactic acid melt-blown fiber as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～5

[0054] Embodiments 1 to 5 provide a series of high-strength polylactic acid melt-blown fibers. The high-strength polylactic acid melt-blown fibers include a skin layer and a core layer wrapped by the skin layer. The skin layer is a melt-blown polypropylene fiber layer, and the core layer is a melt-blown fiber layer. Polylactic acid fiber layer.

[0055] The preparation method includes the following steps: S1. Put polypropylene resin, polyester liquid crystal polymer, compatibilizer and antioxidant into a high-mixer and mix until uniform, then melt, extrude, draw, and water-cool , pelletizing to obtain melt-blown polypropylene masterbatch;

[0056] S2. Feed the melt-blown polypropylene resin and melt-blown polypropylene masterbatch into the first screw extruder, and melt it into a melt-blown polypropylene melt at 240-270°C; feed the polylactic acid resin into the second screw extruder In the screw extruder, it is melted into a melt-blown polylactic acid melt at 170-200 °C;

...

Embodiment 6～9

[0061] The preparation method of Examples 6-9 is the same as that of Example 1, and the specific component contents are shown in Table 2.

[0062] The component content (part) of table 2 embodiment 6~9

[0063]

Embodiment 10～14

[0065] The preparation method of Examples 10-14 is the same as that of Example 1, and the specific component contents are shown in Table 3.

[0066] The component content (part) of table 3 embodiment 10~14

[0067]

[0068]

[0069] The preparation method of Examples 15-19 is the same as that of Example 1, and the specific component contents are shown in Table 4.

[0070] The component content (part) of table 4 embodiment 15~19

[0071]

[0072]

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
The melt flow rateaaaaaaaaaa
The melt flow rateaaaaaaaaaa
Melting pointaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-strength polylactic acid melt-blown fiber as well as a preparation method and application thereof. The high-strength polylactic acid melt-blown fiber comprises a skin layer and a core layer wrapped by the skin layer, the skin layer is a melt-blown polypropylene fiber layer, the core layer is a melt-blown polylactic acid fiber layer, and the skin layer contains melt-blown polypropylene, a compatilizer and polyester type liquid crystal macromolecules. Compared with the polylactic acid fiber, the polypropylene fiber has a better self-heating bonding effect, so that the bonding strength of the high-strength melt-blown polylactic acid fiber is improved to a certain extent; meanwhile, the polyester liquid crystal polymer is added into the skin layer, so that the bonding strength of the polylactic acid melt-blown fiber can be remarkably improved. The high-strength polylactic acid melt-blown fiber is especially suitable for preparing air filtering material products.

Description

technical field [0001] The invention relates to the technical field of nonwoven fabrics, and more specifically, to a high-strength polylactic acid melt-blown fiber and its preparation method and application. Background technique [0002] Melt-blown cloth is prepared by melt-blown process. The high-flow polymer melt is drawn into ultra-fine fibers at high speed through the action of hot air, and is self-thermally bonded to a roller mesh or plastic mesh to form a web. It has the characteristics of low density, high processing efficiency, good uniformity of fiber web, etc., and has a fluffy structure. The melt-blown nonwoven fabric after electret treatment has high filtration efficiency and excellent air permeability, and can be widely used in household air purifiers, automobiles, etc. In the field of air filter materials such as air conditioning filters or fresh air systems. [0003] At present, the main raw material used in meltblown nonwovens is polypropylene, which has exc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): D01F8/06D01F8/14D01F1/10D01D5/34D04H1/56B01D39/16
Inventor 周日敏陈平绪叶南飚陈振树李成丁超
Owner GUANGDONG KINGFA TECH CO LTD