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Composition capable of being molten and processed and preparation method thereof

A melt processing and composition technology, which is applied in the field of melt processable polymer compositions, can solve problems affecting the appearance and quality of breathable films, and affect the high dispersion of inorganic fillers, so as to improve processing stability and production efficiency, Reduces bubble chatter and eliminates melt fracture effects

Active Publication Date: 2009-12-02
FUJIAN HENGAN HYGIENE MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology is to feed the fluoropolymer processing aid in the feeding section of the screw extruder. If this technology is directly used in the composition of the breathable film, the fluoropolymer processing aid often affects The high dispersion of inorganic fillers affects the appearance and quality of breathable films

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Put 50kg of calcium carbonate (particle size 2~5μm) in a high-speed mixer (rotating speed 1500r p m, temperature 125±5°C) and stir for 15 minutes, then add 0.5kg of saponified oligomeric macromolecular dispersant, at 1500r ·p·m Add 0.5kg of antioxidant after high-speed stirring for 10 minutes, add 5kg of low-density polyethylene LDPE and 40kg of linear low-density polyethylene after 10 minutes of high-speed stirring. After mixing uniformly at a low speed of 750r·p·m, it is fed into a two-stage twin-screw extruder, and then reaches the metering section after passing through the conveying section of the extruder. Extrusion, pelletizing, drying, packaging.

[0024] The melt-processed composition can be extruded and stretched into a breathable film, which is applied to baby diapers, women's sanitary napkins, moisture-permeable waterproof materials for construction, and the like. The film is extruded as a thicker extrudate which is stretched after it exits the extrusion die...

Embodiment 2

[0027] Put 30kg of calcium carbonate with a particle size of 3-7μm in a high-speed mixer (speed 1500r p m, temperature 125±5°C) and stir for 10-20 minutes, then add 0.5kg of titanium-aluminum coupling agent or stearic acid Coupling agent, mix for 10-20 minutes, add 0.5 kg of polyester dispersant containing substituted amino end groups, at least one polymer dispersant in polycarboxylate dispersant, at 1500r p m high speed After stirring for 10 minutes, 50 kg of LLDPE was added. After mixing uniformly at a low speed of 750r·p·m, it is fed into a two-stage twin-screw extruder, and then reaches the metering section after passing through the conveying section of the extruder. Extrusion, pelletizing, drying, packaging.

Embodiment 3

[0029] Put 70 kg of calcium carbonate with a particle size of 3-7 μm in a high-speed mixer (rotating speed 1500 r p m, temperature 120 ± 15 ° C) and stir for 10-20 minutes, then add 0.7 kg of saponified oligomeric macromolecular dispersant, containing The polyester dispersant that replaces the amino end group and the polycarboxylate dispersant are combined in any proportion. After stirring at 1500r·p·m for 10 minutes, add 50kg of LLDPE. After mixing evenly at a low speed of 750r·p·m, it is fed into a two-stage twin-screw extruder, and then reaches the metering section after passing through the conveying section of the extruder, where 1.6kg of fluorine-containing additives are added to the metering section of the extruder for extrusion, Diced, dried and packaged.

[0030] According to the melt processable composition provided by the present invention, it comprises particulate filler, low density polyethylene, linear low density polyethylene, dispersant and fluoropolymer, and de...

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Abstract

The invention relates to a composition capable of being molten and processed and a preparation method thereof. The composition contains fine particle padding, low-density polyethylene, linear low-density polyethylene, dispersant and fluoropolymer, wherein the dispersant is macromolecule dispersant or high polymer dispersant, and is formed by one or the combination of saponated oligomerization dispersant, polyester dispersant containing substituted amine end groups, and polycarboxylates dispersant. The preparation method of the composition comprises the following steps: a, dehydrating the fine particle padding at more than 140 DEG C; b, modifying the surface of the fine particle padding by using the macromolecule dispersant or high polymer dispersant; c, uniformly mixing the fine particle padding, the low-density polyethylene and the linear low-density polyethylene; d, feeding mixture obtained by the step c into a screw extruder; e, adding fluoropolymer processing agent into a measurement section of the screw extruder; f, screw-extruding; and g, cutting. The molten and processed composition can be extruded and pulled into a ventilated membrane, and is applied to disposable diaper, feminine hygiene / panty liner and the like.

Description

technical field [0001] The present invention relates to a melt processable composition, and more particularly to a melt processable polymer composition for making breathable films. Background technique [0002] Breathable membrane is also called "waterproof and breathable microporous membrane", which is characterized by breathability and impermeability. The microporous membrane itself has countless interconnected micropores, and its pore size is very small (about 0.01-10 microns), and it can only pass through water vapor molecules with a particle size of about 0.4nm, but it is too large for any particle size (see Table 1) Raindrops or water droplets cannot pass through. In this way, the water vapor emitted by the human body can effectively diffuse outward through the micropores, while the water droplets cannot penetrate inward, so as to achieve the waterproof and moisture-permeable effect. This kind of microporous membrane has been used to produce disposable diapers, women...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/06C08K9/04C08K3/00C08L67/00C08L27/12
Inventor 张富山翁文伟
Owner FUJIAN HENGAN HYGIENE MATERIAL
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