阅读说明：本技术 一种使闪蒸法非织造布表面附着静电的方法 (A method of so that Flash Spinning Nonwovens surface is adhered to electrostatic ) 是由 罗章生 罗铮 刘爽 吴祥新 袁新红 于 2018-05-24 设计创作，主要内容包括：本发明公开了一种使闪蒸法非织造布表面附着静电的方法,包括以下步骤：步骤一、制备纺丝原液：制备纺丝原液：将聚合物、纺丝溶剂及二甲基甲酰胺混合均匀加入到高压反应釜中,制得纺丝原液；步骤二、所述纺丝原液从闪蒸纺丝设备的喷丝头喷出,形成纤维束,带有纤维束的高压空气被转向板引向静电开纤装置,带有纤维束的高压空气经过静电开纤装置均匀开纤成网状蓬松结构,开纤后的纤维束沉降在积集带上形成纤维网,纤维网经过辊轮的热轧形成薄片。本发明首次将二甲基甲酰胺加入纺丝原液中,使闪蒸法非织造布表面附着静电的能力加强,使得成品纤维分散性能大大提高,同时增加了闪蒸法非织造布的力学性能。(The invention discloses a kind of methods for making Flash Spinning Nonwovens surface attachment electrostatic, the following steps are included: Step 1: preparing spinning solution: preparing spinning solution: polymer, spin solvent and dimethylformamide being uniformly mixed and are added in autoclave, spinning solution is made；Step 2: the spinning solution is sprayed from the spinning head of flash spinning equipment, form fibre bundle, pressure-air with fibre bundle is diverted plate and guides electrostatic fiber-opening apparatus into, pressure-air with fibre bundle reticulates fluff structure by the uniform fibrillation of electrostatic fiber-opening apparatus, fibre bundle after fibrillation, which is deposited on productive set band, forms web, and web forms thin slice by the hot rolling of roller.Dimethylformamide is added in spinning solution for the first time by the present invention, reinforces the ability of Flash Spinning Nonwovens surface attachment electrostatic, so that finished fiber dispersion performance greatly improves, while increasing the mechanical property of Flash Spinning Nonwovens.)

1. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic, it is characterised in that: the following steps are included:

Step 1: preparing spinning solution: polymer, spin solvent and dimethylformamide being uniformly mixed and are added to reaction under high pressure It in kettle, is sufficiently mixed under conditions of 180-200 DEG C of temperature, pressure 6-10MPa, spinning solution is made；

Step 2: flash method prepares polyethylene fibre: the spinning solution is sprayed from the spinning head of flash spinning equipment, and spinning is former The solvent flash evapn of liquid, the polymer of spinning solution cool and solidify rapidly, form fibre bundle, the pressure-air with fibre bundle It is diverted plate and guides electrostatic fiber-opening apparatus into, the pressure-air with fibre bundle reticulates fluffy by the uniform fibrillation of electrostatic fiber-opening apparatus Loose structure, the fibre bundle after fibrillation, which is deposited on productive set band, forms web, and web forms thin slice by the hot rolling of roller.

2. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic as described in claim 1, it is characterised in that: described Polymer is one or more of polyethylene, polyvinyl chloride, polyacrylonitrile, polyamide.

3. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic as described in claim 1, it is characterised in that: described Spin solvent is one or more of methylene chloride, trichlorofluoromethane, dichloroethylene, pentamethylene.

4. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic as described in claim 1, it is characterised in that: described In autoclave, blender speed of agitator is 80-100rpm, incorporation time 2-6h.

5. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic as described in claim 1, it is characterised in that: described The solid-liquid ratio of polymer and the spin solvent are as follows: (3-4) g:20 mL.

6. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic as described in claim 1, it is characterised in that: described The volume ratio of dimethylformamide and the spin solvent is (0.4-3): 20.

7. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic as described in claim 1, it is characterised in that: described Electrostatic fiber-opening apparatus applies the electrostatic of 5-10kV to fibre bundle.

8. a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic as described in claim 1, it is characterised in that: described Fibre deposition solidifying net spee into the net is 90-110 m/min.

Technical field

The present invention relates to the technical fields of non-woven cloth more particularly to one kind, and Flash Spinning Nonwovens surface to be made to adhere to electrostatic Method.

Background technique

Flash-spinning is a kind of special case of dry spinning, and polymer quickly forms fiber, also known as moment when solvent flashes Spinning.The spining technology method is mainly: fibre-forming polymer being mixed with solvent, selected solvent boiling point is lower than polymer, In Polymer cannot be dissolved under normal temperature and pressure；In the case where pressurized, heated, fibre-forming polymer can be dissolved.It is omited when being heated to temperature Higher than solvent boiling point when, spinning solution is made in polymer dissolution, squeezes out immediately from spinneret orifice, into low temperature (or room temperature) and low It presses in (or normal pressure) medium, the solvent in liquid thread evaporates suddenly, and polymer cools and solidifies rapidly, forms ultra-fine network knot Structure.Tow is by the needle-shaped negative electrode plate with high pressure, through corona discharge.Fiber fibrillation, band due to band homophilic charge in tow Electric fiber is neutralized by the convoying curtain metal plate corona discharge off the net with high pressure positive electricity, and a kind of flash-spinning in the prior art is set It is standby as shown in Figure 1, including spinning head 10, deflecting plate 20, productive set band 30, target plate 40, needle electrode plate 50, the first roller 60, the Two rollers 70, metal plate 80, spinning solution are sprayed from spinning head, and ejection air velocity is 6000-8000m/min, solvent moment Foaming flash distillation carries out super drawing to tow using velocity gradient variation, forms ultra-fine reticular fibre item, make silk with electrostatic methods Beam fibrillation keeps monofilament state, and makes fibre deposition networking using electrostatic equipment, and coagulating net spee is 90-110 m/min.

Only the U.S., Japan have carried out industrialized production to the technique at present, and fiber-forming polymer used is generally structure and compares Regular polyolefin, such as polyethylene, polypropylene and polymethylpentene.The development of through a long time, can be used for fiber-forming polymer Raw material from the mixture of various olefin polymers, olefin polymer and other polymers developed to polyesters, polyurethanes, Polyamide etc., mainly or based on polyethylene.Using existing electrostatic technique, so that nonwoven fabric surface electrostatic adhesive force is weak, And then affect the dispersion performance of subsequent fiber.

In view of this, the present inventor studies and designs a kind of method for making Flash Spinning Nonwovens surface attachment electrostatic, this Thus case generates.

Summary of the invention

The purpose of the present invention is to provide a kind of methods for making Flash Spinning Nonwovens surface attachment electrostatic, so that finished product is fine Dimension dispersion performance greatly improves, while increasing the mechanical property of Flash Spinning Nonwovens.

To achieve the goals above, the technical scheme adopted by the invention to solve the technical problem is that: one kind making flash method The method of nonwoven fabric surface attachment electrostatic, comprising the following steps:

Step 1: preparing spinning solution: polymer, spin solvent and dimethylformamide being uniformly mixed and are added to reaction under high pressure It in kettle, is sufficiently mixed under conditions of 180-200 DEG C of temperature, pressure 6-10MPa, spinning solution is made；

Step 2: flash method prepares polyethylene fibre: the spinning solution is sprayed from the spinning head of flash spinning equipment, and spinning is former The solvent flash evapn of liquid, the polymer of spinning solution cool and solidify rapidly, form fibre bundle, the pressure-air with fibre bundle It is diverted plate and guides electrostatic fiber-opening apparatus into, the pressure-air with fibre bundle reticulates fluffy by the uniform fibrillation of electrostatic fiber-opening apparatus Loose structure, the fibre bundle after fibrillation, which is deposited on productive set band, forms web, and web forms thin slice by the hot rolling of roller.

As the preferred embodiment of embodiment, the polymer is polyethylene, in polyvinyl chloride, polyacrylonitrile, polyamide It is one or more of.

As the preferred embodiment of embodiment, the spin solvent is methylene chloride, trichlorofluoromethane, dichloroethylene, ring penta One or more of alkane.

As the preferred embodiment of embodiment, in the autoclave, blender speed of agitator is 80-100rpm, mixing Time is 2-6h.

As the preferred embodiment of embodiment, the solid-liquid ratio of the polymer and the spin solvent are as follows: (3-4) g:20 mL.

As the preferred embodiment of embodiment, the volume ratio of the dimethylformamide and the spin solvent is (0.4-3): 20 。

As the preferred embodiment of embodiment, the electrostatic fiber-opening apparatus applies the electrostatic of 5-10kV to fibre bundle.

As the preferred embodiment of embodiment, the fibre deposition solidifying net spee into the net is 90-110 m/min.

Since present invention employs above-mentioned technical solutions so that the invention has the following advantages: the present invention for the first time By dimethylformamide be added to polymer, spin solvent composition system in so that Flash Spinning Nonwovens obtain absorption and The function of release electrostatic disperses fiber more by electrostatic technique, and cooperates drawing of fiber, and it is non-woven to increase flash method The mechanical property of cloth.

Detailed description of the invention

Fig. 1 is a kind of structural schematic diagram of flash spinning equipment of the prior art.

Specific embodiment