A cushioned, cushioned pressure nonwoven spacer fabric, its processing device and processing method

Abstract

The present application provides a kind of buffering and slow pressure non-woven spacer fabric, its processing device and method, buffering and slow pressure non-woven spacer fabric includes negative Poisson ratio material particles and built-in auxetic structure or adds auxetic particle.Belong to textile material and technical field.The present application passes through built-in auxetic structure in spacer fabric, and the shaped auxetic structure enters in auxetic structure passage, is in the interior of spacer fabric, so that spacer fabric has buffering and slow pressure capacity.Spacer fabric made of auxetic structure material and polyester fiber has the characteristics of high specific strength, large specific stiffness, strong designability, also has the advantages of high negative Poisson ratio structure shear modulus, strong energy absorption capacity, etc., has great development potential in protective clothing, building materials, automotive interiors, sports equipment and other fields.

Description

TECHNICAL FIELD

[0001] The present application relates to a kind of non-woven spacer fabric of buffering and pressure, its processing device and processing method, belong to textile material and technical field. BACKGROUND

[0002] Spacer fabric is a kind of textile fabric with intermediate layer spacing, similar to sandwich structure three-dimensional fabric, also known as "sandwich" fabric. Spacer fabric is composed of two outer layers and an intermediate layer, the outer layer structure is variable, the connection of the upper and lower two outer layers is through the intermediate spacing filament, also known as monofilament, which acts as an intermediate spacer layer. The performance characteristics of spacer fabric designed with different materials will also vary, such as softness, stability and buffering and pressure; The material of the intermediate spacing filament of the intermediate spacer layer is generally polyester fiber, such as polyester. Because the intermediate spacer layer connects the upper and lower two layers, the walking path is more, and the yarn tension is large, so the strength of the material is generally higher. It is just because the material strength of the intermediate layer is generally higher that the support and pressure resistance of the fabric can be improved. Spacer fabric has three-layer structure, and its compression performance is widely studied. At present, the research on the buffering and pressure capacity of spacer fabric is relatively less, and the research on the material selection of the intermediate layer and the outer layer of spacer fabric is more.

[0003] Therefore, there is an urgent need in the art for a new type of non-woven spacer fabric processing device and method with buffering and pressure capacity. SUMMARY

[0004] The purpose of the present application is to solve the problem of lack of new type of non-woven spacer fabric processing device and method with buffering and pressure capacity in the prior art.

[0005] To achieve the purpose of solving the above problems, the technical solution adopted by the present application is to provide a kind of non-woven spacer fabric of buffering and pressure, its processing device and processing method.

[0006] In the first aspect of the present application, a kind of non-woven spacer fabric of buffering and pressure is provided, which includes negative Poisson's ratio material particles and built-in auxetic structure or adds auxetic particles.

[0007] Preferably, the auxetic structure is divided into two-dimensional / three-dimensional ordered and disordered structure.

[0008] Further preferably, the auxetic structure includes concave honeycomb structure, double arrow structure, star structure, chiral and anti-chiral structure.

[0009] Further preferably, the shape of the auxetic particle includes concave hexagon and sphere.

[0010] The second aspect of the present application provides a processing device for preparing the above-mentioned buffer pressure non-woven spacer fabric, comprising a feeding mechanism, an outlet of the feeding mechanism being connected to an inlet of a screw extrusion mechanism, an outlet of the screw extrusion mechanism and a dilatancy particle feeding mechanism being respectively connected to a composite spinning mechanism, the composite spinning mechanism having a side wall in an inverted funnel shape and being provided with a spinning channel, the bottom plate of the composite spinning mechanism being alternately provided with dilatancy structure feeding holes and spinning holes, so that the polyester melt and the dilatancy particles are simultaneously spun out of the composite spinning mechanism, and the composite spinning mechanism being internally provided with a dilatancy structure channel; an extrusion forming mechanism being provided below the composite spinning mechanism, the extrusion forming mechanism being externally provided with a cooling mechanism, the cooling mechanism being provided below a fiber film conveying mechanism, and the fiber film conveying mechanism being provided below a finished product output mechanism.

[0011] Preferably, the dilatancy structure channel has two.

[0012] Preferably, the spinning channel has three.

[0013] Preferably, the extrusion forming mechanism has a wedge structure with a wide top and a narrow bottom.

[0014] Preferably, the fiber film conveying mechanism is located on both sides of the extrusion forming mechanism and is used to convey the surface film of the non-woven spacer fabric.

[0015] The third aspect of the present application provides a method for processing the buffer pressure non-woven spacer fabric by using the above-mentioned processing device, comprising the following steps:

[0016] Step 1: feeding the polyester particle raw material into the hopper of the feeding mechanism;

[0017] Step 2: conveying the polyester particle raw material to the screw extruder to form a polyester melt and then into the composite spinning plate;

[0018] Step 3: feeding the dilatancy particles and the particles of the negative Poisson's ratio material into the dilatancy particle feeding mechanism and then into the composite spinning plate through the dilatancy structure feeding holes, or feeding the formed dilatancy structure into the composite spinning mechanism through the dilatancy structure channel;

[0019] Step 4: the dilatancy particles or the formed dilatancy structure in step 3 are spun out of the spinning holes of the composite spinning mechanism together with the polyester melt in step 2;

[0020] Step 5: entering and passing through the extrusion forming mechanism, and being cooled under the cooling condition of the cooling mechanism to form the polyester dilatancy structure containing the dilatancy particles and having the buffer pressure capacity;

[0021] Step 6: the fiber film conveying mechanism inputs the polyester film on both sides of the extrusion forming mechanism and wraps the polyester dilatancy structure in step 5;

[0022] Step 7, outputting the shaped buffer pressure non-woven spacer fabric through the finished product output mechanism.

[0023] Preferably, in step 3, the shape of the auxetic particles includes concave hexagon, sphere, and the auxetic structure is divided into two-dimensional / three-dimensional ordered and disordered structure, and further preferably concave honeycomb structure, double arrow structure, star structure, chiral and anti-chiral structure.

[0024] Preferably, in step 4, the spinning device further controls the speed ratio of the spinning orifice by adjusting the size of the spinning orifice and the passing amount of terylene melt per unit time through computer control, so that the spun fiber has a special bending shape.

[0025] Preferably, in step 4, a liquid coating that can enhance the stiffness and shock absorption performance of the fiber can also be introduced to add a coating layer to the fiber, so that it has bulletproof and anti-stabbing functions; or particles with vibration reduction, fragrance, and color effects are added to give the fiber vibration reduction, pressure reduction, fragrance, and color effects.

[0026] Preferably, in step 5, the cooling mechanism adopts a ring blowing cooling mode.

[0027] Preferably, in the processing method, (1) the production process conditions (material, supply speed) of the feeding mechanism; (2) the cooling speed of the cooling mechanism; (3) the shape of the mold in the extrusion molding mechanism and the extrusion speed of the terylene fiber; (4) the shape and size of the auxetic particles; (5) the process parameters (spinning orifice shape, spinning orifice diameter, spinning speed, setting temperature) of the composite spinning mechanism; (6) the fiber film material, coating type, and conveying speed of the fiber film conveying mechanism can be adjusted.

[0028] Compared with the prior art, the present application has the following beneficial effects:

[0029] (1) The spinning orifices and the auxetic material feeding holes in the composite spinning plate are arranged alternately, the terylene melt and the auxetic particles are simultaneously fed into the composite spinning mechanism, the auxetic particles are uniformly distributed in the terylene melt, and the terylene auxetic structure with buffer and pressure relief functions is formed after cooling under the cooling condition after the extrusion molding mechanism.

[0030] (2) By embedding the shaped auxetic structure in the spacer fabric, the shaped auxetic structure is fed into the auxetic material feeding hole and is inside the fabric, so that the spacer fabric has the buffer and pressure relief capability.

[0031] (3) The prepared buffer pressure non-woven spacer fabric has good energy absorption and buffer pressure performance due to the use of the auxetic material, and can be applied to seat cushions, protective clothing, protective equipment and the like; the long fiber line or yarn can transmit active medium, so that the auxetic textile becomes a material of intelligent textile due to the anti-inflammatory, deodorant and drug release capacity, and the auxetic textile can improve the pressure comfort of clothes; the auxetic material used as a paving material can significantly enhance the pressure resistance and shock resistance; in the biomedical field, the artificial auxetic blood vessel can enhance the response of the blood vessel wall to blood pulsation and resist rupture; in the field of deep water operation of the sea, the auxetic polymer material will show high hydraulic stability, and has important application in the field of defense such as nuclear submarine manufacturing; the non-woven spacer fabric made of the auxetic structural material and polyester fiber has the characteristics of high specific strength, large specific stiffness and strong designability, and also has the advantages of high shear modulus of negative Poisson's ratio structure and strong energy absorption capacity, and has great development potential in the fields of protective clothing, building materials, automotive interiors, sports equipment and the like. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1 It is a processing device diagram of the buffer pressure non-woven spacer fabric in the application;

[0033] Figure 2 It is a plane schematic diagram of the non-woven spacer fabric with macroscopic and microscopic auxetic structures;

[0034] Figure 3 It is a schematic diagram of an inner concave hexagonal auxetic structure;

[0035] Figure 4 It is a schematic diagram of fiber auxetic with built-in auxetic structure;

[0036] The drawing label: 1-feeding mechanism, 2-screw extrusion mechanism, 3-auxetic particle feeding mechanism, 31-first auxetic structure channel; 32-second auxetic structure channel, 4-composite spinning mechanism, 41-first spinning channel; 42-second spinning channel; 43-third spinning channel; 44-auxetic structure feeding hole; 45-spinning hole, 5-extrusion molding mechanism; 6-cooling mechanism; 7-conveying mechanism, 8-finished product output mechanism, 9-auxetic structure, 10-fiber auxetic distribution schematic diagram. DETAILED DESCRIPTION

[0037] In order to make the application more obvious and easy to understand, the preferred embodiments are described in detail below with the help of the drawings:

[0038] As shown in Figures 1-4 The application provides a buffer pressure non-woven spacer fabric, a processing device and method thereof, and a preparation method thereof, which comprises the following steps:

[0039] Step 1, the polyester particle raw material is sent into the hopper of the feeding mechanism;

[0040] Step 2, the polyester particle raw material is transported into a screw extruder to form a polyester melt, and enters a composite spinning mechanism;

[0041] Step 3, the auxetic particles are fed into an auxetic particle feeding mechanism and enter the composite spinning plate through the auxetic structure feeding hole, or the formed auxetic structure is fed into the composite spinning structure through the first and second auxetic structure channels;

[0042] Step 4, the auxetic particles or the formed auxetic structure in step 3 are ejected from the spinning hole of the composite spinning mechanism together with the polyester melt in step 2;

[0043] Step 5, enter and pass through the extrusion molding mechanism, and cool under the cooling condition of the cooling mechanism to form a polyester auxetic structure containing auxetic particles and having a buffering and pressure relief capacity;

[0044] Step 6, the fiber film conveying mechanism inputs the polyester film on both sides of the extrusion molding mechanism and wraps the polyester auxetic structure described in step 6;

[0045] Step 7, the finished product output mechanism is output to obtain a formed buffering and pressure relief non-woven spacer fabric.

[0046] Through the above steps, the spacer fabric with a buffering and pressure relief effect of Examples 1-5 and related products are prepared, as shown in the following table:

[0047]

[0048] The above is only the preferred embodiment of the present application, and is not any form and substantial limitation of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the present application, some improvements and supplements can be made, which should be considered as the protection scope of the present application. For those skilled in the art, without departing from the spirit and scope of the present application, some changes, modifications and equivalent changes can be made based on the disclosed technical content, which are equivalent embodiments of the present application; at the same time, any equivalent changes, modifications and evolution of the above-mentioned embodiments according to the essential technology of the present application are still within the scope of the technical solutions of the present application.

Claims

1. A method of processing a cushioned, pressure nonwoven spacer fabric, characterized in that, The processing device adopted includes a feeding mechanism, the outlet of which is connected with the inlet of a screw extrusion mechanism, the outlet of the screw extrusion mechanism and a dilatancy particle feeding mechanism are respectively connected with a composite spinning mechanism, the sidewall of the composite spinning mechanism is in an inverted funnel shape and is provided with a spinning channel, the bottom plate of the composite spinning mechanism is alternately provided with dilatancy structure feeding holes and spinning holes, so that the terylene melt and the dilatancy particles are simultaneously spun out of the composite spinning mechanism, and the composite spinning mechanism is internally provided with a dilatancy structure channel; an extrusion forming mechanism is arranged below the composite spinning mechanism, the extrusion forming mechanism is externally provided with a cooling mechanism, the cooling mechanism is provided below with a fiber membrane conveying mechanism, and the fiber membrane conveying mechanism is provided below with a finished product output mechanism. The processing method includes the following steps: Step 1, the terylene particle raw material is sent into the hopper of the feeding mechanism; Step 2, the terylene particle raw material is conveyed to the screw extruder to form a terylene melt and is fed into the composite spinning mechanism; Step 3, the dilatancy particles are fed into the dilatancy particle feeding mechanism and are fed into the composite spinning mechanism through the dilatancy structure feeding holes, and the formed dilatancy structure is fed into the bottom plate of the composite spinning mechanism through the dilatancy structure feeding holes; Step 4, the dilatancy particles and the formed dilatancy structure in step 3 are spun out of the spinning holes of the composite spinning mechanism together with the terylene melt in step 2; Step 5, the dilatancy particles and the formed dilatancy structure are cooled to form a terylene dilatancy structure with a buffering and pressure-relieving capacity under the cooling condition of the cooling mechanism; Step 6, the fiber membrane conveying mechanism inputs the terylene membrane on both sides of the extrusion forming mechanism and wraps the terylene dilatancy structure in step 5; Step 7, the finished product output mechanism is output to obtain a formed buffering and pressure-relieving non-woven spacer fabric.

2. The method of claim 1, wherein The buffering and pressure-relieving non-woven spacer fabric includes the built-in dilatancy structure and the dilatancy particles.

3. The method of claim 1 wherein the step of processing further comprises the step of: The dilatancy structure is divided into two-dimensional / three-dimensional ordered and disordered structures.

4. The method of claim 1 wherein the step of processing is performed by a computer. The shape of the dilatancy particles includes an inner concave hexagon and a sphere.

5. The method of claim 3, wherein the step of processing is performed by a computer. The dilatancy structure includes an inner concave honeycomb structure, a double arrow structure, a star structure, a chiral structure and an anti-chiral structure.

6. The method of claim 1 wherein the step of processing further comprises the step of: The extrusion forming mechanism is in a wedge structure with a wide upper part and a narrow lower part.

7. The processing method as described in claim 1, characterized in that, In step 4, a liquid coating for enhancing the rigidity and shock-absorbing performance of the fiber can be introduced to add a coating layer to the fiber to make it have bulletproof and anti-stabbing functions; or particles with vibration-reducing, fragrance and color effects can be added to endow the fiber with vibration-reducing and pressure-relieving, aromatic smell and color effects.

8. The processing method as described in claim 1, characterized in that, In step 5, the cooling mechanism adopts a ring blowing cooling mode.

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