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Biodegradable composite material containing SiO2 for melt-blown nonwoven fabrics and preparation method

A melt-blown non-woven fabric and biodegradation technology is applied in the field of SiO2-containing biodegradable composite materials and preparation of melt-blown non-woven fabrics. Good uniformity and high whiteness

Active Publication Date: 2015-11-25
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Its disadvantages are that the electret voltage is as high as 50KV, the particle size of tourmaline is in the micron range of 2-7μm, industrial melt blown is easy to block holes for a long time, and the industrial-grade tourmaline itself is gray-black, and PLA slices are colorful

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
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  • Biodegradable composite material containing SiO2 for melt-blown nonwoven fabrics and preparation method
  • Biodegradable composite material containing SiO2 for melt-blown nonwoven fabrics and preparation method
  • Biodegradable composite material containing SiO2 for melt-blown nonwoven fabrics and preparation method

Examples

Experimental program
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Effect test

example 1

[0032] The melt-blown nonwovens containing ultrafine SiO 2 A method for preparing a biodegradable composite material, including: SiO by chemical modification 2 The surface of the powder raw material is modified to be lipophilic to obtain modified SiO 2 ; Under the condition of mechanical stirring, 0.1 parts by weight of modified SiO 2, 100 parts by weight of biodegradable resin and 10 parts by weight of polyethylene glycol 200 (PEG200) are pre-mixed in proportion; finally, they are melt-blended and extruded by a twin-screw extruder to obtain a uniform SiO-containing 2 Biodegradable composite resin slices. The biodegradable resin chip is melt-blown on a traditional polypropylene melt-blown equipment to obtain a melt-blown nonwoven fabric. The filter efficiency of the nonwoven fabric obtained from the chip is 95.51%, and the filtration resistance is 15Pa.

[0033] Wherein, the biodegradable resin is a mixture of polylactic acid (PLA) and polycaprolactone (PCL), and the mixing...

example 2

[0042] The melt-blown nonwovens containing ultrafine SiO 2 A method for preparing a biodegradable composite material, including: SiO by chemical modification 2 The surface of the powder raw material is modified to be lipophilic to obtain modified SiO 2 ; Under the condition of mechanical stirring, 0.75 parts by weight of modified SiO 2 , 100 parts by weight of biodegradable resin and 10 parts by weight of polyethylene glycol 1000 (PEG1000) are pre-mixed in proportion; finally, they are melt-blended and extruded by a twin-screw extruder to obtain a uniform SiO-containing 2 Biodegradable composite resin slices. The biodegradable resin chips are melt-blown on conventional polypropylene melt-blown equipment to obtain melt-blown nonwoven fabrics. The filtration efficiency of the nonwoven fabric obtained from the slicing was 98.81%, and the filtration resistance was 20Pa.

[0043] Wherein, the biodegradable resin is a mixture of polylactic acid (PLA) and polybutylene succinate (...

example 3

[0052] The melt-blown nonwovens containing ultrafine SiO 2 A method for preparing a biodegradable composite material, including: SiO by chemical modification 2 The surface of the powder raw material is modified to be lipophilic to obtain modified SiO 2 ; Under the condition of mechanical stirring, 1 weight part of modified SiO 2 , 100 parts by weight of polylactic acid (PLA) and 10 parts by weight of dibutyl phthalate (DBP) are pre-mixed in proportion; finally, they are melt-blended and extruded by a twin-screw extruder to obtain a uniform SiO-containing 2 Biodegradable composite resin chips, see figure 1 . The biodegradable resin chips are melt blown on traditional polypropylene melt blown equipment to obtain melt blown nonwovens, see figure 2 . The filtration efficiency of the nonwoven fabric obtained from the slice is 99.69%, and the filtration resistance is 25Pa, which is equivalent to the filtration effect of the non-degradable polypropylene meltblown nonwoven fabri...

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
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Abstract

The invention relates to a biodegradable composite material containing SiO2 for melt-blown nonwoven fabrics and a preparation method. The method comprises the following steps: modifying the surface of SiO2 raw powder to be lipophilic by a chemical modification method, obtaining modified SiO2; premixing 0.1 to 10 parts by weight of the modified SiO2, 100 parts by weight of biodegradable resin and 1 to 10 parts by weight of plasticizer according to a ratio under a mechanical stirring condition; finally melt blending and extruding to obtain a composite material through a double-screw extruder. An electret effect of the melt-blown nonwoven fabrics is reinforced through an electret function of SiO2, and the mechanical property of the melt-blown nonwoven fabrics is improved by a mode of inorganic toughening, and a filter effect can be greatly improved after an electret is formed on the basis of biodegradable advantage in comparison with conventional polypropylene melt-blown nonwoven fabrics, and the filtration resistance is reduced, moreover, the strength in vertical and horizontal directions as well as the elongation rate are improved.

Description

technical field [0001] The invention relates to raw materials for the production of melt-blown nonwovens and its preparation technology, in particular to SiO-containing materials used in melt-blown nonwovens 2 Biodegradable composite material and preparation method. The biodegradable composite material is made of modified SiO 2 Composite with biodegradable resin, it can produce high-efficiency and low-resistance melt-blown non-woven fabrics through traditional polypropylene (PP) melt-blown equipment. Background technique [0002] Melt-blown nonwovens are widely used in air filter materials, medical and health materials, thermal insulation materials, oil-absorbing materials and other fields due to their excellent characteristics of fine fibers, small pore size and high porosity. Due to the extensive use of melt-blown non-woven fabrics, non-degradable melt-blown non-woven fabrics such as traditional polypropylene, polyamide, and polyethylene have also caused a certain amount...

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
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Application Information

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IPC IPC(8): C08L67/04C08L67/02C08L71/02C08K13/06C08K9/06C08K9/04C08K3/36C08K5/12B29C47/92B29C48/92
Inventor 唐国翌蔡诚宋国林赵亮罗杰
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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