High-flexibility biodegradable non-woven fabric

Abstract

The invention discloses a high-flexibility biodegradable non-woven fabric. The non-woven fabric comprises an upper fiber mesh layer and a lower fiber mesh layer, wherein the upper fiber mesh layer isprepared from toughened polylactic acid fibers and pure cotton fibers; and the lower fiber mesh layer is prepared from toughened polylactic acid fibers and coarse denier ES fibers. According to the non-woven fabric disclosed in the invention, 5-30 wt% of modified hemp nano fibers are added to polylactic acid master batch to prepare the toughened polylactic acid fibers; surface modification is usedas a toughening agent, so that the toughness of polylactic acid is improved; meanwhile, the dense hydrogen bonds on the surface of nano cellulose are destroyed, the redispersibility of the nano cellulose is improved, and the dispersion of a nanofiber filler in a polylactic acid system is facilitated; and meanwhile, the surface smoothness and the cooling treatment can eliminate the stinging sensation when the hemp fibers are in contact with a human body.

Description

technical field

[0001] The invention relates to a highly flexible biodegradable nonwoven fabric. Background technique

[0002] Non-woven non-woven fabrics are fiber mesh fabrics that do not require warp and weft weaving and interweaving, but only require artificial or natural filaments or short fibers to be randomly strutted, laid, and reinforced. Due to its product characteristics, the preparation of nonwovens has the advantages of simple process, high production efficiency, low cost, wide range of uses, and diverse sources, so that it is widely used in clothing linings, medical dressings, industrial filter linings, and thermal insulation packaging. and many other fields.

[0003] Due to environmental requirements, the existing non-woven fabrics use a large number of biodegradable natural polymer materials-polylactic acid (PLA) to make non-woven fabrics. Polylactic acid (PLA) is a non-woven fabric that is easier to transform from natural plants. The popularization and app...

Examples

Embodiment 1

[0024] The highly flexible biodegradable nonwoven fabric in this embodiment includes: an upper fiber web layer and a lower fiber web layer; wherein, the upper fiber web layer is made of toughened polylactic acid fibers and pure cotton fibers; the lower fiber web layer Layers were made from toughened polylactic acid fibers and coarse denier ES fibers.

[0025] Wherein, the preparation method of the toughened polylactic acid fiber is: adding 15% by weight of hemp nanofibers to the polylactic acid masterbatch. The hemp nanofibers include at least one of hemp cellulose nanowhiskers, hemp cellulose nanofibrils, and hemp microfibrils.

Embodiment 2

[0027] The highly flexible biodegradable nonwoven fabric in this embodiment includes: an upper fiber web layer and a lower fiber web layer; wherein, the upper fiber web layer is made of toughened polylactic acid fibers and pure cotton fibers; the lower fiber web layer Layers were made from toughened polylactic acid fibers and coarse denier ES fibers.

[0028] Wherein, the preparation method of the toughened polylactic acid fiber is: adding 10% by weight of modified hemp nanofibers to the polylactic acid masterbatch. The hemp nanofibers include at least one of hemp cellulose nanowhiskers, hemp cellulose nanofibrils, and hemp microfibrils.

[0029] The modification treatment step of modified hemp nanofiber is:

[0030] 1) Pretreatment, swelling 12-24, centrifuging at 5000rpm, filtering, redissolving in DMF to prepare hemp nanofiber premix,

[0031] 2) Add (triethylamine as a catalyst, silane coupling agent (such as γ-aminopropyltriethoxysilane (KH-550), toughening agent (capro...

Embodiment 3

[0034] The highly flexible biodegradable nonwoven fabric in this embodiment includes: an upper fiber web layer, a middle nanowire layer, and a lower fiber web layer; wherein, the upper fiber web layer is made of toughened polylactic acid fibers and pure cotton fibers; The lower fiber web layer is prepared from toughened polylactic acid fibers and coarse denier ES fibers.

[0035] The preparation method of described intermediate layer is:

[0036] 1) Preparation of ZnO nanowire dispersion

[0037] Add monoalkoxy titanate coupling hydrophilic 1-2 parts of water modifier, after stirring evenly, slowly add 10-30 parts of surface-treated ZnO nanowires to prepare a hydrophilic ZnO nanowire dispersion;

[0038] 2) Preparation of essence self-encapsulated microcapsules

[0039] Add 10-20 parts of essence to the ingredients containing 1-5 parts of C12-15 pareth-12, 1-3 parts of polyvinyl alcohol, 1-3 parts of hydroxymethyl cellulose, sodium carboxymethyl cellulose 0.1-0.5 parts, 0....

technical field

[0001] The invention relates to a highly flexible biodegradable nonwoven fabric. Background technique

[0002] Non-woven non-woven fabrics are fiber mesh fabrics that do not require warp and weft weaving and interweaving, but only require artificial or natural filaments or short fibers to be randomly strutted, laid, and reinforced. Due to its product characteristics, the preparation of nonwovens has the advantages of simple process, high production efficiency, low cost, wide range of uses, and diverse sources, so that it is widely used in clothing linings, medical dressings, industrial filter linings, and thermal insulation packaging. and many other fields.

[0003] Due to environmental requirements, the existing non-woven fabrics use a large number of biodegradable natural polymer materials-polylactic acid (PLA) to make non-woven fabrics. Polylactic acid (PLA) is a non-woven fabric that is easier to transform from natural plants. The popularization and app...

Examples

Embodiment 1

[0024] The highly flexible biodegradable nonwoven fabric in this embodiment includes: an upper fiber web layer and a lower fiber web layer; wherein, the upper fiber web layer is made of toughened polylactic acid fibers and pure cotton fibers; the lower fiber web layer Layers were made from toughened polylactic acid fibers and coarse denier ES fibers.

[0025] Wherein, the preparation method of the toughened polylactic acid fiber is: adding 15% by weight of hemp nanofibers to the polylactic acid masterbatch. The hemp nanofibers include at least one of hemp cellulose nanowhiskers, hemp cellulose nanofibrils, and hemp microfibrils.

Embodiment 2

[0027] The highly flexible biodegradable nonwoven fabric in this embodiment includes: an upper fiber web layer and a lower fiber web layer; wherein, the upper fiber web layer is made of toughened polylactic acid fibers and pure cotton fibers; the lower fiber web layer Layers were made from toughened polylactic acid fibers and coarse denier ES fibers.

[0028] Wherein, the preparation method of the toughened polylactic acid fiber is: adding 10% by weight of modified hemp nanofibers to the polylactic acid masterbatch. The hemp nanofibers include at least one of hemp cellulose nanowhiskers, hemp cellulose nanofibrils, and hemp microfibrils.

[0029] The modification treatment step of modified hemp nanofiber is:

[0030] 1) Pretreatment, swelling 12-24, centrifuging at 5000rpm, filtering, redissolving in DMF to prepare hemp nanofiber premix,

[0031] 2) Add (triethylamine as a catalyst, silane coupling agent (such as γ-aminopropyltriethoxysilane (KH-550), toughening agent (capro...

Embodiment 3

[0034] The highly flexible biodegradable nonwoven fabric in this embodiment includes: an upper fiber web layer, a middle nanowire layer, and a lower fiber web layer; wherein, the upper fiber web layer is made of toughened polylactic acid fibers and pure cotton fibers; The lower fiber web layer is prepared from toughened polylactic acid fibers and coarse denier ES fibers.

[0035] The preparation method of described intermediate layer is:

[0036] 1) Preparation of ZnO nanowire dispersion

[0037] Add monoalkoxy titanate coupling hydrophilic 1-2 parts of water modifier, after stirring evenly, slowly add 10-30 parts of surface-treated ZnO nanowires to prepare a hydrophilic ZnO nanowire dispersion;

[0038] 2) Preparation of essence self-encapsulated microcapsules

[0039] Add 10-20 parts of essence to the ingredients containing 1-5 parts of C12-15 pareth-12, 1-3 parts of polyvinyl alcohol, 1-3 parts of hydroxymethyl cellulose, sodium carboxymethyl cellulose 0.1-0.5 parts, 0....