阅读说明：本技术 一种高撕裂高强度的合成革用针刺无纺布的制造方法 (Manufacturing method of high-tear high-strength needle-punched non-woven fabric for synthetic leather ) 是由 周安美 曲绪平 于 2020-03-02 设计创作，主要内容包括：本发明公开了一种高撕裂高强度的合成革用针刺无纺布的制造方法,包括如下步骤：选择纤维,依据产品性能的要求,选择涤纶短纤和A中所制的改性涤纶短纤POY,按比例进行称重开松混合；粗开松工序,由三台称重开包机,把所需要的涤纶短纤和A中所制的改性涤纶短纤POY,按比例投入到输送平帘上,送入到粗开松机,使块状卷曲压实的纤维得到初步开松,粗开松机由10块钢制钉板组成,制得初步开松的改性涤纶短纤；混棉工序,经过上述步骤得到的原料,通过风送和旋风分离器的作用,使其均匀分布在混棉大仓进行沉积；通过设计安装了本方案,可制备出高撕裂高强度的合成革用无纺布,且步骤简单,适合广泛推广。(The invention discloses a method for manufacturing a high-tear high-strength needle-punched non-woven fabric for synthetic leather, which comprises the following steps: selecting fibers, selecting the polyester staple fibers and the modified polyester staple fibers POY prepared in the step A according to the requirement of product performance, and weighing, opening and mixing the polyester staple fibers and the modified polyester staple fibers POY in a proportion; a coarse opening process, namely putting required polyester staple fibers and modified polyester staple fibers POY prepared in the step A on a conveying flat curtain in proportion by using three weighing bale openers, and sending the polyester staple fibers and the modified polyester staple fibers POY into a coarse opening machine to preliminarily open blocky curled and compacted fibers, wherein the coarse opening machine consists of 10 steel nail plates to prepare preliminarily opened modified polyester staple fibers; a cotton mixing process, wherein the raw materials obtained through the steps are uniformly distributed in a cotton mixing silo for deposition under the action of air conveying and a cyclone separator; by designing and installing the scheme, the non-woven fabric for the synthetic leather with high tearing strength can be prepared, and the method is simple in steps and suitable for wide popularization.)

1. A manufacturing method of a high-tear high-strength needle-punched non-woven fabric for synthetic leather is characterized by comprising the following steps:

A. selecting fibres

Selecting polyester staple fibers and the modified polyester staple fibers POY prepared in the step A according to the requirements of product performance, and weighing, opening and mixing the polyester staple fibers and the modified polyester staple fibers POY in proportion;

B. coarse opening procedure

Putting required polyester staple fibers and modified polyester staple fibers POY prepared in the step A on a conveying flat curtain in proportion by using three weighing bale openers, and sending the polyester staple fibers and the modified polyester staple fibers POY to a coarse opener to preliminarily open blocky curled and compacted fibers, wherein the coarse opener consists of 10 steel nail plates to prepare preliminarily opened modified polyester staple fibers;

C. cotton blending process

The raw materials obtained by the steps are uniformly distributed in a cotton mixing big bin for deposition under the action of air conveying and a cyclone separator, and are conveyed to a precise starting machine under the combined action of a flat curtain and a brad nail inclined curtain;

D. fine opening process

Feeding the raw materials obtained in the steps into a fine opener, fully opening and pre-carding in the fine opener to further open and straighten fibers, and feeding the fibers into the next process by a fan;

E. cotton feeding of air pressure cotton box

The fiber after the finish-starting machine enters an upper cotton box of the air pressure cotton box through an air conveying pipeline, the fiber falls into a lower cotton box in a snowflake shape under the action of a cotton feeding roller and a doffer, and then the fiber is given out in a constant volume mode in a balanced pressure mode, so that the density of a cotton layer body is consistent;

F. superposing the processed raw materials in double layers, and adding an aramid fiber net between the double layers, wherein the aramid fiber net is soaked in a chitosan quaternary ammonium salt solution;

G. the carding machine receives the processed raw materials, and after the processed raw materials enter a cotton feeding roller, the raw materials are carded into a uniform double-layer fiber mesh thin layer under the action of double cylinders and double doffers.

2. The method for manufacturing a high tear and high strength needle-punched non-woven fabric for synthetic leather according to claim 1, wherein the following steps are performed after the completion of the above steps,

cross lapping

5-20 g/square meter of fiber web is held and conveyed by a clamping carbon curtain, so that the fiber web is lapped to 7-18 layers under the action of reciprocation without the action of external force, and the thickness of the cotton web is 10-40 cm for the next procedure;

② feeding machine

Feeding the fiber web before the needling machine to uniformly clamp the fiber web before needling and feed the fiber web into a needle area;

3) needling machine reinforcement

Pre-needling reinforcement

The fiber web formed by carding and lapping is primarily intertwined and shaped through a pre-needling process, the direction of the fiber web is ensured to be unchanged, a pre-needling machine is a single-needle-plate upper needling machine, and the needle density of a needle plate cloth is 4500 pieces/meter;

② main needling reinforcement

Further needling and tangling the fiber web preliminarily entangled by the pre-needling machine by a main needling machine, wherein the main needling machine is a double-needle-plate ectopic opposite needling machine, and the needle plate cloth needle density is 13000 pieces/meter;

③ trimming and needling for reinforcement

The needled non-woven fabric which is reinforced and tangled by the main needling is needled on the front side and the back side of the finished needled non-woven fabric through a face trimming needling machine, so that the finished needled non-woven fabric has a flat surface and no phenomena of burrs and bone marks, and the needle density of needle plate cloth is 14000 pieces per meter.

3. The method for manufacturing the high-tear high-strength needled non-woven fabric for synthetic leather according to claim 1, wherein the chitosan quaternary ammonium salt solution is soaked, the chitosan quaternary ammonium salt solution is prepared into a solution according to test conditions (bath ratio is 1: 50), ethanolamine is used for adjusting the pH value of the solution to 3.5, the solution is put into raw materials, the raw materials are put into an oscillating water bath for reaction for 30min, then the solution is pre-dried for 5min at 80 ℃ and is baked for 3min at 160 ℃, then ultrasonic cleaning is carried out, and finally dehydration and drying are carried out.

4. The method for manufacturing the high-tear high-strength needle-punched non-woven fabric for synthetic leather according to claim 1, wherein the rotation speed of the coarse opener in the step B is 1000 rpm.

5. The method for manufacturing the high-tear high-strength needle-punched non-woven fabric for synthetic leather according to claim 1, wherein the cotton layer is ensured to be consistent in height in the step C.

6. The method for manufacturing the high-tear high-strength needle-punched non-woven fabric for synthetic leather according to claim 1, wherein the step D is that the fine opener consists of 10 steel nail plates and the rotating speed is 1500 rpm.

7. The method for manufacturing a high-tear high-strength needle-punched non-woven fabric for synthetic leather according to claim 1, wherein the treated non-woven fabric is stored by a storage tension frame.

8. The method for manufacturing the high-tear high-strength needle-punched non-woven fabric for synthetic leather according to claim 7, wherein the non-woven fabric subjected to the cloth storage treatment is rolled up by an automatic fixed-length edge cutting and winding machine.

Technical Field

The invention relates to the technical field of needle-punched non-woven fabrics, in particular to a manufacturing method of a high-tear high-strength needle-punched non-woven fabric for synthetic leather.

Background

The needle-punched non-woven fabric is made of terylene and polypropylene fibre through several times of needle punching and proper hot rolling treatment. According to different processes, different materials are matched to prepare hundreds of commodities, and products with various specifications can be customized according to different purposes in various industries. Is made of terylene and polypropylene fiber raw materials and is subjected to carding, combing, pre-needling and main needling. The center is added with a mesh cloth interlayer, and then the cloth is formed by double-pass nucleation and air-laid needling, the post-press filter cloth has a three-dimensional structure, after heat setting and singeing, the surface is treated by chemical oil agent, so that the filter cloth has smooth appearance, uniform micropore distribution, good density when viewed from the surface, smooth and clean surfaces on two sides and good air permeability, and the filter application on a plate and frame compressor proves that high-strength pressure can be used, the filter precision is up to 4 microns or less, and two raw materials of polypropylene fiber and polyester fiber can be provided according to the needs of users. Practice proves that the performance of the non-woven filter cloth is better when the non-woven filter cloth is subjected to plate-and-frame filter pressing: for example, coal slurry treatment in coal preparation plants and wastewater treatment in iron and steel plants. Treating waste water in breweries and printing and dyeing mills. If filter cloth with other specifications is used, the problem that filter cakes are not dry and difficult to fall off can occur, after the non-woven filter cloth is used, the filter cakes are quite dry when the pressure of a filter reaches 10kg-12kg, and the filter cakes can automatically fall off when the filter is opened. When a user selects the non-woven filter cloth, the non-woven filter cloth with different thicknesses and qualities is mainly considered according to air permeability, filtering precision, elongation and the like, product parameters such as a polyester needle felt and a polypropylene needle felt are required to be set, and specifications and varieties can be set.

The existing needle-punched non-woven fabric for synthetic leather needs certain tear resistance and strength, the existing processing scheme is complex, and the cost is high, so that the manufacturing method of the needle-punched non-woven fabric for synthetic leather with high tear resistance and high strength is provided.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides a method for manufacturing a high-tear high-strength needle-punched non-woven fabric for synthetic leather.

In order to achieve the purpose, the invention adopts the following technical scheme: a manufacturing method of a high-tear high-strength needle-punched non-woven fabric for synthetic leather comprises the following steps:

A. selecting fibres

Selecting polyester staple fibers and the modified polyester staple fibers POY prepared in the step A according to the requirements of product performance, and weighing, opening and mixing the polyester staple fibers and the modified polyester staple fibers POY in proportion;

B. coarse opening procedure

Putting required polyester staple fibers and modified polyester staple fibers POY prepared in the step A on a conveying flat curtain in proportion by using three weighing bale openers, and sending the polyester staple fibers and the modified polyester staple fibers POY to a coarse opener to preliminarily open blocky curled and compacted fibers, wherein the coarse opener consists of 10 steel nail plates to prepare preliminarily opened modified polyester staple fibers;

C. cotton blending process

The raw materials obtained by the steps are uniformly distributed in a cotton mixing big bin for deposition under the action of air conveying and a cyclone separator, and are conveyed to a precise starting machine under the combined action of a flat curtain and a brad nail inclined curtain;

D. fine opening process

Feeding the raw materials obtained in the steps into a fine opener, fully opening and pre-carding in the fine opener to further open and straighten fibers, and feeding the fibers into the next process by a fan;

E. cotton feeding of air pressure cotton box

The fiber after the finish-starting machine enters an upper cotton box of the air pressure cotton box through an air conveying pipeline, the fiber falls into a lower cotton box in a snowflake shape under the action of a cotton feeding roller and a doffer, and then the fiber is given out in a constant volume mode in a balanced pressure mode, so that the density of a cotton layer body is consistent;

F. superposing the processed raw materials in double layers, and adding an aramid fiber net between the double layers, wherein the aramid fiber net is soaked in a chitosan quaternary ammonium salt solution;

G. the carding machine receives the processed raw materials, and after the processed raw materials enter a cotton feeding roller, the raw materials are carded into a uniform double-layer fiber mesh thin layer under the action of double cylinders and double doffers.

Preferably, the above steps are completed, followed by the following steps,

cross lapping

5-20 g/square meter of fiber web is held and conveyed by a clamping carbon curtain, so that the fiber web is lapped to 7-18 layers under the action of reciprocation without the action of external force, and the thickness of the cotton web is 10-40 cm for the next procedure;

② feeding machine

Feeding the fiber web before the needling machine to uniformly clamp the fiber web before needling and feed the fiber web into a needle area;

3) needling machine reinforcement

Pre-needling reinforcement

The fiber web formed by carding and lapping is primarily intertwined and shaped through a pre-needling process, the direction of the fiber web is ensured to be unchanged, a pre-needling machine is a single-needle-plate upper needling machine, and the needle density of a needle plate cloth is 4500 pieces/meter;

② main needling reinforcement

Further needling and tangling the fiber web preliminarily entangled by the pre-needling machine by a main needling machine, wherein the main needling machine is a double-needle-plate ectopic opposite needling machine, and the needle plate cloth needle density is 13000 pieces/meter;

③ trimming and needling for reinforcement

Needling the needled non-woven fabric reinforced and intertwined by the main needling through the front and back surfaces of a face trimming needling machine to achieve the purposes of flat surface of the formed needled non-woven fabric, no burr and bone mark phenomena and 14000 needles per meter of needle plate cloth needle density;

preferably, the chitosan quaternary ammonium salt solution is soaked, the chitosan quaternary ammonium salt solution is prepared into a solution according to the test conditions (the bath ratio is 1: 50), ethanolamine is used for adjusting the pH value of the solution to be 3.5, the solution is placed into raw materials and reacts in an oscillating water bath for 30min, then the raw materials are pre-dried for 5min at the temperature of 80 ℃ and baked for 3min at the temperature of 160 ℃, and then ultrasonic cleaning is carried out, and finally dehydration and drying are carried out.

Preferably, the rotating speed of the coarse opener in the step B is 1000 revolutions per minute.

Preferably, the cotton layer height is ensured to be consistent in the step C.

Preferably, the fine opener in the step D consists of 10 steel nail plates, and the rotating speed is 1500 rpm.

Preferably, the treated non-woven fabric is stored by a storage tension frame.

Preferably, the non-woven fabric after the cloth storage treatment is rolled up by an automatic fixed-length edge cutting and winding machine.

Compared with the prior art, the invention has the beneficial effects that:

install this scheme through the design, will add to the non-woven fabrics through modified aramid fiber net, can prepare out the high non-woven fabrics for synthetic leather who tears high strength, and the step is simple, is fit for extensively promoting.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.

FIG. 1 is a schematic flow diagram of the present invention;

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

Referring to fig. 1, a method for manufacturing a high-tear high-strength needle-punched non-woven fabric for synthetic leather includes the following steps:

A. selecting fibres

Selecting polyester staple fibers and the modified polyester staple fibers POY prepared in the step A according to the requirements of product performance, and weighing, opening and mixing the polyester staple fibers and the modified polyester staple fibers POY in proportion;

B. coarse opening procedure

Putting required polyester staple fibers and modified polyester staple fibers POY prepared in the step A on a conveying flat curtain in proportion by using three weighing bale openers, and sending the polyester staple fibers and the modified polyester staple fibers POY to a coarse opener to preliminarily open blocky curled and compacted fibers, wherein the coarse opener consists of 10 steel nail plates to prepare preliminarily opened modified polyester staple fibers;

C. cotton blending process

The raw materials obtained by the steps are uniformly distributed in a cotton mixing big bin for deposition under the action of air conveying and a cyclone separator, the height of a cotton layer is ensured to be consistent, and the cotton layer is conveyed to a precise starting machine under the combined action of a flat curtain and a brad inclined curtain;

D. fine opening process

Feeding the raw materials obtained in the steps into a fine opener, fully opening and pre-carding in the fine opener to further open and straighten fibers, and feeding the fibers into the next procedure by a fan, wherein the fine opener consists of 10 steel nail plates and has the rotating speed of 1500 revolutions per minute;

E. cotton feeding of air pressure cotton box

The fiber after the finish-starting machine enters an upper cotton box of the air pressure cotton box through an air conveying pipeline, the fiber falls into a lower cotton box in a snowflake shape under the action of a cotton feeding roller and a doffer, and then the fiber is given out in a constant volume mode in a balanced pressure mode, so that the density of a cotton layer body is consistent;

F. superposing the two layers of the processed raw materials, adding an aramid fiber net between the two layers, soaking the aramid fiber net in a chitosan quaternary ammonium salt solution, preparing the solution according to the test conditions (bath ratio is 1: 50), adjusting the pH value of the solution to 3.5 by using ethanolamine, putting the solution into the raw materials, reacting in an oscillating water bath for 30min, pre-drying at 80 ℃ for 5min, baking at 160 ℃ for 3min, cleaning by using ultrasonic waves, and finally dehydrating and drying;

G. the carding machine receives the processed raw materials, and after the processed raw materials enter a cotton feeding roller, the raw materials are carded into a uniform double-layer fiber mesh thin layer under the action of double cylinders and double doffers.

Further, after the above steps are completed, the following steps are carried out,

cross lapping

5-20 g/square meter of fiber web is held and conveyed by a clamping carbon curtain, so that the fiber web is lapped to 7-18 layers under the action of reciprocation without the action of external force, and the thickness of the cotton web is 10-40 cm for the next procedure;

② feeding machine

Feeding the fiber web before the needling machine to uniformly clamp the fiber web before needling and feed the fiber web into a needle area;

3) needling machine reinforcement

Pre-needling reinforcement

The fiber web formed by carding and lapping is primarily intertwined and shaped through a pre-needling process, the direction of the fiber web is ensured to be unchanged, a pre-needling machine is a single-needle-plate upper needling machine, and the needle density of a needle plate cloth is 4500 pieces/meter;

② main needling reinforcement

Further needling and tangling the fiber web preliminarily entangled by the pre-needling machine by a main needling machine, wherein the main needling machine is a double-needle-plate ectopic opposite needling machine, and the needle plate cloth needle density is 13000 pieces/meter;

③ trimming and needling for reinforcement

Needling the needled non-woven fabric reinforced and intertwined by the main needling through the front and back surfaces of a face trimming needling machine to achieve the purposes of flat surface of the formed needled non-woven fabric, no burr and bone mark phenomena and 14000 needles per meter of needle plate cloth needle density;

and storing the treated non-woven fabric by using a fabric storage tension frame, and then coiling and winding by using an automatic fixed-length edge cutting and winding machine.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.