Application of non-woven fabrics in the preparation of lining non-woven fabrics for vehicle seat foam

Abstract

The present invention discloses an application of non-woven fabric in the preparation of lining non-woven fabric for vehicle seat foam, and relates to the technical field of lining non-woven fabric preparation, wherein the non-woven fabric is subjected to lining molding processing, and then demoulding to obtain lining non-woven fabric for vehicle seat foam; wherein the lining molding processing method includes 2D, 3D steam molding method, and / or 2D, 3D thermoforming method. The 2D, 3D thermoforming method of the lining non-woven fabric in the technical solution improved by the present invention can effectively control the temperature of the non-woven fabric, without the need for oven heating, reducing the equipment investment burden and equipment floor space, and effectively reducing energy consumption. The 2D, 3D steam molding method does not require the use of TPU film to make sealing bags, does not require manual disassembly and assembly of sealing bags, and the steam spraying time is short, only 3-5 seconds, and the thickness can be controlled by adjusting the distance between the mold and the mold core, and it can also ensure that there is no gap between the product and the mold, and the shaping effect is excellent.

Description

Technical Field

[0001] The invention relates to the technical field of preparing lining non-woven fabrics, and in particular to application of a non-woven fabric in preparing lining non-woven fabrics for vehicle seat foam. Background Art

[0002] Lining non-woven fabric is a common fabric for vehicle seats. As consumers' demands for the quality and performance of non-woven fabrics gradually increase, the existing preparation methods of lining non-woven fabrics can no longer meet production needs.

[0003] Existing preparation methods for lining non-woven fabrics include cold press molding and steam molding. For example, the cold press 2D and 3D molding methods provided by patent CN201811355408.5 require oven heating before molding. The use of oven heating not only increases the burden of equipment investment, but also the large floor space of the oven causes the overall equipment to occupy more than 10 square meters. In addition, the inlet and outlet of the oven will emit heat and increase energy consumption. After the non-woven fabric is heated and enters the shaping station, it will drop by more than 50°C per second. During the mold pressing process, the hot material will instantly shrink after contacting the cold mold, resulting in a gap of 5 to 20 mm between the right angle shape of the molded product and the right angle of the mold core. After the product is foamed, the foam body surface cannot be completely consistent with the data.

[0004] For example, the liner steam 2D ​​and 3D molding processing method provided by patent CN201811354293.8 is complex, labor-intensive, energy-intensive, and requires many consumables, and cannot meet current production needs. This is mainly manifested in the need to use TPU film to make sealing bags, and the sealing bags need to be manually disassembled and assembled. The steam spraying time takes more than 15 seconds until the sealing bag is filled with steam to complete the heating. Moreover, the fixture needs to be manually disassembled and assembled to finally achieve shaping, and the sealing tape needs to be evacuated and adsorbed to shape it. It is difficult to achieve complete fitting and shaping by vacuum adsorption in relatively deep parts of the molding surface, and the shaping effect is not ideal. The thickness of the product is uncontrollable. Summary of the invention

[0005] In view of the defects in the prior art, the present invention provides a method for preparing a non-woven fabric for lining foaming cotton of a vehicle seat. The 2D and 3D thermoforming method of the non-woven fabric for lining the technical solution provided by the present invention adopts the built-in oil circuit of the auxiliary mold for heating. The non-woven fabric will be heated only after the auxiliary mold is merged, which can effectively control the temperature of the non-woven fabric, and does not require oven heating, reducing the equipment investment burden and equipment floor space, effectively reducing energy consumption, and can effectively avoid the problem that the hot material will instantly shrink after contacting the cold mold, resulting in a gap of 5-20mm between the right angle shape of the formed product and the right angle of the mold core, and can achieve the effect of 0 gap between the product and the mold. The 2D and 3D steam forming method of the non-woven fabric for lining the technical solution provided by the present invention does not require the use of TPU film to make a sealing bag, does not require manual disassembly and assembly of the sealing bag, and the steam spraying time is short, only 3-5 seconds. The thickness can be controlled by adjusting the distance between the mold and the mold core, and the gap between the product and the mold can be guaranteed to be 0, with excellent shaping effect.

[0006] To this end, the technical solution provided by the present invention is as follows:

[0007] The present invention provides an application of a non-woven fabric in the preparation of a non-woven fabric for a lining of a foamed seat of a vehicle. The non-woven fabric is subjected to a lining molding process and then demolded to obtain the non-woven fabric for a lining of a foamed seat of a vehicle. The lining molding process includes a 2D, 3D steam molding method, and / or a 2D, 3D thermoforming method.

[0008] Preferably, the 2D and 3D steam forming method comprises the following steps: an automatic feeding gear pulls the non-woven fabric to a hydraulic molding device, and then the hydraulic molding device is used to drive the upper and lower main molds to close for pre-molding of the front shape, and the 3D shape part cylinder drives the auxiliary mold to merge for pre-molding, and steam is sprayed into the mold cavity formed by merging the upper and lower molds to heat and soften the non-woven fabric, and then cooled and molded, the auxiliary mold is withdrawn, the upper and lower main molds are opened, and the lining non-woven fabric is obtained after demolding.

[0009] Further preferably, the height of the mold cavity is 1-5 mm; the temperature of the steam is 80-170° C.; and the heating time is 3-5 seconds.

[0010] Further preferably, the hydraulic tonnage of the hydraulic shaping equipment is 20-50 tons, and 2D and / or 3D molds are selected; the cooling shaping is to cool and shape the heated and softened non-woven fabric by water cooling or air cooling for 3-5 seconds.

[0011] Preferably, the 2D and 3D thermoforming method comprises the following steps: heating the built-in oil circuit of the auxiliary mold, cutting the non-woven fabric into shape, putting the mold on the mold core, the mold core automatically moves to the forming station, the auxiliary molds are automatically merged to heat and soften the non-woven fabric, cooled and shaped, the auxiliary molds are automatically separated, the mold core retreats to the de-lining station, and the lining non-woven fabric is obtained after demolding.

[0012] Further preferably, the heating of the built-in oil circuit of the auxiliary mold is to 100-300° C.; the heating time of the auxiliary molds automatically merging is 5-6S; and the distance between the auxiliary mold and the mold core after the auxiliary molds are automatically merged is set to 1-5mm.

[0013] Further preferably, the cooling and shaping is to cool and shape the heated and softened non-woven fabric by air cooling or water cooling; and the auxiliary mold is a 2D and / or 3D mold.

[0014] Preferably, the nonwoven fabric comprises the following raw material components in parts by weight: 5-40 parts by weight of low-melting-point fiber for shaping and reducing air permeability, 5-40 parts by weight of low-melting-point fiber for shaping and increasing hardness, 3-10 parts by weight of black polyester staple fiber and 20-60 parts by weight of white 2D polyester staple fiber;

[0015] The preparation method of the non-woven fabric comprises the following steps: mixing the raw material components of the non-woven fabric, then loosening the mixed fibers, combing the loosened fibers into a fiber web, laying the web, and then performing a needle punching process to obtain the non-woven fabric.

[0016] Further preferably, the low-melting-point fiber used for shaping and reducing air permeability is a low-melting-point fiber of model 2080; the low-melting-point fiber used for shaping and increasing hardness is a low-melting-point fiber of model 4080; the gram weight of the lining non-woven fabric is 50-900g / m 2 .

[0017] The beneficial effects of the present invention are embodied in:

[0018] (1) The 2D and 3D thermoforming method of the lining non-woven fabric in the technical solution provided by the present invention adopts the built-in oil circuit of the auxiliary mold for heating. The non-woven fabric will be heated only after the auxiliary mold is merged, which can effectively control the temperature of the non-woven fabric. There is no need for oven heating, which reduces the equipment investment burden and equipment footprint, effectively reduces energy consumption, and can effectively avoid the problem of instantaneous shrinkage of hot materials after contact with cold molds, resulting in a gap of 5-20mm between the right angle shape of the formed product and the right angle of the mold center, thereby achieving an effect of zero gap between the product and the mold.

[0019] (2) The 2D and 3D steam forming method of the lining non-woven fabric in the technical solution provided by the present invention does not require the use of TPU film to make the sealing bag, does not require manual disassembly of the sealing bag, and the steam spraying time is as short as 3-5 seconds. The thickness can be controlled by adjusting the distance between the mold and the mold core, and zero gap can be ensured between the product and the mold, with excellent shaping effect. DETAILED DESCRIPTION

[0020] The following embodiments of the technical solution of the present invention are described in detail. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0021] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0022] Example 1

[0023] This embodiment provides an application of a non-woven fabric in preparing a non-woven fabric for a lining of a vehicle seat foam. The non-woven fabric is subjected to a lining molding process and then demolded to obtain a non-woven fabric for a lining of a vehicle seat foam.

[0024] Among them, the lining molding processing method is a 2D and 3D steam molding method, which includes the following steps: the automatic feeding gear pulls the non-woven fabric to the hydraulic molding equipment, and then the hydraulic molding equipment is used to drive the upper and lower main molds to close for pre-pressing the front shape, and the 3D shape part cylinder drives the auxiliary mold to merge for pre-pressing, and steam is sprayed into the mold cavity formed by the merger of the upper and lower molds to heat and soften the non-woven fabric, and then cooled and molded, the auxiliary mold is withdrawn, the upper and lower main molds are opened, and the lining non-woven fabric is obtained after demolding.

[0025] The height of the mold cavity is 2.5 mm; the temperature of the steam is 120° C.; and the heating time is 4 seconds.

[0026] The hydraulic tonnage of the hydraulic shaping equipment is 20-50 tons, and 2D and / or 3D molds are selected; the cooling shaping is to cool the heated and softened non-woven fabric by water cooling or air cooling for 4 seconds.

[0027] The nonwoven fabric includes the following raw material components in parts by weight: 22 parts by weight of low-melting point fiber for shaping and reducing air permeability, 22 parts by weight of low-melting point fiber for shaping and increasing hardness, 6 parts by weight of black polyester staple fiber and 40 parts by weight of white 2D polyester staple fiber.

[0028] The low-melting-point fiber used for shaping and reducing air permeability is the low-melting-point fiber of model 2080; the low-melting-point fiber used for shaping and increasing hardness is the low-melting-point fiber of model 4080.

[0029] The preparation method of the non-woven fabric comprises the following steps: mixing the raw material components of the non-woven fabric, then loosening the mixed fibers, combing the loosened fibers into a fiber web, laying the web, and then performing a needle punching process to obtain the non-woven fabric.

[0030] Example 2

[0031] This embodiment provides an application of a non-woven fabric in preparing a non-woven fabric for a lining of a vehicle seat foam. The non-woven fabric is subjected to a lining molding process and then demolded to obtain a non-woven fabric for a lining of a vehicle seat foam.

[0032] Among them, the 2D and 3D thermoforming methods include the following steps: heating the built-in oil circuit of the auxiliary mold, cutting the non-woven fabric into shape, putting the mold on the mold core, the mold core automatically moves to the forming station, the auxiliary molds are automatically merged to heat and soften the non-woven fabric, cooled and shaped, the auxiliary molds are automatically separated, the mold core retreats to the de-lining station, and the lining non-woven fabric is obtained after demolding.

[0033] The built-in oil circuit of the auxiliary mold is heated to 200°C; the heating time for the auxiliary mold to be automatically merged is 6S; after the auxiliary mold is automatically merged, the distance between the auxiliary mold and the mold core is set to 2.5mm.

[0034] The cooling and shaping process is to cool and shape the heated and softened nonwoven fabric by air cooling or water cooling; the auxiliary mold is a 2D and / or 3D mold.

[0035] The nonwoven fabric includes the following raw material components in parts by weight: 22 parts by weight of low-melting point fiber for shaping and reducing air permeability, 22 parts by weight of low-melting point fiber for shaping and increasing hardness, 6 parts by weight of black polyester staple fiber and 40 parts by weight of white 2D polyester staple fiber.

[0036] The low-melting-point fiber used for shaping and reducing air permeability is the low-melting-point fiber of model 2080; the low-melting-point fiber used for shaping and increasing hardness is the low-melting-point fiber of model 4080.

[0037] The preparation method of the non-woven fabric comprises the following steps: mixing the raw material components of the non-woven fabric, then loosening the mixed fibers, combing the loosened fibers into a fiber web, laying the web, and then performing a needle punching process to obtain the non-woven fabric.

[0038] Test example

[0039] The mechanical properties of the lining nonwoven fabrics prepared in Example 1-2 were tested, and the results are shown in Table 1.

[0040] Table 1

[0041]

[0042] Test Example 2

[0043] The combustion, atomization and rupture properties of the lining nonwoven fabrics prepared in Examples 1-2 were tested. The results are shown in Table 2.

[0044] Table 2

[0045]

[0046] Test Example 3

[0047] The VOC of the lining nonwoven fabric prepared in Example 1-2 was tested, and the results are shown in Table 3.

[0048] Table 3

[0049]

[0050]

[0051] Test Example 4

[0052] The SOC of the lining nonwoven fabric prepared in Example 1-2 was tested, and the results are shown in Table 4.

[0053] Table 4

[0054]

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. Application of a non-woven fabric in the preparation of a lining non-woven fabric for a vehicle seat foam, characterized in that: The non-woven fabric is subjected to lining molding and then demolded to obtain a lining non-woven fabric for vehicle seat foam; wherein the lining molding method includes a 2D, 3D steam molding method, and / or a 2D, 3D thermoforming method; the lining molding method does not require oven heating, which reduces the equipment investment burden and equipment floor space, effectively reduces energy consumption, and can effectively avoid the problem that the hot material will shrink instantly after contacting the cold mold, resulting in a gap of 5-20mm between the right angle shape of the molded product and the right angle of the mold core, and can achieve the effect of zero gap between the product and the mold; The 2D and 3D steam forming method comprises the following steps: the automatic feeding gear pulls the non-woven fabric to the hydraulic shaping equipment, and then the hydraulic shaping equipment drives the upper and lower main molds to close for front shape pre-pressing, the hydraulic tonnage of the hydraulic shaping equipment is 20-50 tons, the main mold is a 2D and / or 3D mold, the 3D shape part cylinder drives the auxiliary mold to merge for pre-pressing, steam is sprayed into the mold cavity formed by merging the upper and lower main molds to heat and soften the non-woven fabric, and then cooled and shaped, the auxiliary mold is withdrawn, the upper and lower main molds are opened, and the lining non-woven fabric is obtained after demolding; the height of the mold cavity is 1-5mm; the temperature of the steam is 80-170℃; the heating time only takes 3-5 seconds, and the cooling shaping is to cool and shape the heated and softened non-woven fabric by water cooling or air cooling for 3-5 seconds; The 2D and 3D thermoforming method comprises the following steps: heating the built-in oil circuit of the auxiliary mold, the auxiliary mold is a 2D and / or 3D mold, cutting the non-woven fabric and putting the mold on the mold core, the mold core automatically moves to the forming station, the auxiliary molds are automatically merged to heat and soften the non-woven fabric, and the non-woven fabric is heated only after the auxiliary molds are merged to effectively control the temperature of the non-woven fabric, cool and shape it, the auxiliary molds are automatically separated, and the mold core retreats to the lining station, and the lining non-woven fabric is obtained after demolding, the built-in oil circuit of the auxiliary mold is heated to 100-300°C; the auxiliary molds are automatically merged for heating for 5-6S; after the auxiliary molds are automatically merged, the distance between the auxiliary mold and the mold core is set to 1-5mm, and the cooling and shaping is to cool and shape the heated and softened non-woven fabric by air cooling or water cooling.

2. The use of the nonwoven fabric according to claim 1 in preparing a nonwoven fabric lining for a vehicle seat foam, characterized in that: The nonwoven fabric comprises the following raw material components in parts by weight: 5-40 parts by weight of low-melting-point fibers for shaping and reducing air permeability, 5-40 parts by weight of low-melting-point fibers for shaping and increasing hardness, 3-10 parts by weight of black polyester staple fibers, and 20-60 parts by weight of white 2D polyester staple fibers; The preparation method of the non-woven fabric comprises the following steps: mixing the raw material components of the non-woven fabric, then loosening the mixed fibers, combing the loosened fibers into a fiber web, laying the web, and then performing a needle punching process to obtain the non-woven fabric.

3. The use of the nonwoven fabric according to claim 2 in preparing a nonwoven fabric lining for a vehicle seat foam, characterized in that: The low-melting-point fiber used for shaping and reducing air permeability is a low-melting-point fiber of model 2080; the low-melting-point fiber used for shaping and increasing hardness is a low-melting-point fiber of model 4080; the gram weight of the lining non-woven fabric is 50-900g / m 2 .

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