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CN-121992580-A - Polyester multicomponent lightweight filament spun-bonded needled non-woven fabric

CN121992580ACN 121992580 ACN121992580 ACN 121992580ACN-121992580-A

Abstract

The invention relates to a terylene multicomponent lightweight filament spun-bonded needle punched non-woven fabric, which belongs to the technical field of non-woven fabrics, wherein the non-woven fabric is formed by carrying out needle punching shaping on a plurality of layers of single webs after cross lapping, the gram weight range of the surface density is 1000-4000g/m < 2 >, the density is less than 0.6g/cm <3 >, the single webs are multicomponent composite fiber webs, the fiber structure is one or a combination of two of sheath-core type, stripping type or parallel type, the fiber material consists of PET and a plurality of COPET, the melting point range of the PET component is 220-260 ℃, and the melting point range of the COPET component is 150-215 ℃. The density of the terylene multicomponent lightweight filament spun-bonded needle-punched non-woven fabric can be controlled below 0.6g/cm <3 >, compared with a traditional nonmetallic material for a car, the weight of the components with the same size can be reduced by 20-30%, the weight can be reduced by 2-3 kg according to the use of 10 kg of the traditional material for each car, the cumulative effect of multiple applications of the whole car is obvious, the power-weight ratio is optimized, and the energy consumption is reduced.

Inventors

  • GAN FENG
  • YANG GUANGCHAO

Assignees

  • 南通杰士友新材料有限公司

Dates

Publication Date
20260508
Application Date
20260311

Claims (10)

  1. 1. The terylene multicomponent light filament spun-bonded needled non-woven fabric is characterized in that the non-woven fabric is formed by cross lapping and needling shaping of a plurality of layers of single nets (1), the surface density gram weight range is 1000-4000g/m < 2 >, and the density is below 0.6g/cm < 3 >; The single web (1) is a multi-component composite fiber web, the fiber structure is one or the combination of two of sheath-core type, stripping type or parallel type, the fiber material is composed of PET and a plurality of COPET, wherein the melting point range of the PET component is 220-260 ℃, and the melting point range of the COPET component is 150-215 ℃; The single net (1) is divided into a left part, a middle part and a right part along the width direction, the COPET melting point of the fibers in the left part and the right part is the same and higher than that of the fibers in the middle part, and the COPET melting point of the fibers in the middle part is 10-40 ℃ lower than that of the fibers in the left part and the right part.
  2. 2. The terylene multicomponent lightweight filament spunbonded needled nonwoven fabric as in claim 1, wherein the grammage of the single web (1) is in the range of 80-300g/m2 and the gate width of the single web (1) is 1.3-2.5 meters.
  3. 3. The polyester multicomponent lightweight filament spun-bonded needled nonwoven fabric as in claim 1, wherein the nonwoven fabric has a gate width in the range of 2.5-5 meters after cross-lapping needling.
  4. 4. The polyester multicomponent lightweight filament spun-bonded needled nonwoven fabric of claim 1, wherein the sheath-core structure comprises a core layer of high-melting-point PET and a sheath layer of low-melting-point COPET, and wherein one component of the sheath-core structure is high-melting-point PET and the other component of the sheath-core structure is low-melting-point COPET.
  5. 5. The terylene multicomponent lightweight filament spun-bonded needled non-woven fabric according to claim 1, wherein the single net (1) is laid by a cross lapping machine to form a composite net (2), and the lapping direction forms an included angle of 90 degrees with the output direction of the single net (1), so that the left, middle and right parts of the single net (1) are layered and distributed in the thickness direction of the composite net (2).
  6. 6. The terylene multicomponent lightweight filament spun-bonded needled nonwoven fabric of claim 1, wherein in the composite web (2), the left and right parts of the single web (1) are positioned on the upper and lower surface layers of the composite web (2), and the middle part is positioned in the middle layer of the composite web (2).
  7. 7. The polyester multicomponent lightweight filament spun-bonded needled nonwoven fabric according to claim 1, wherein the nonwoven fabric is used for compression molding of automotive upholstery, and in compression molding, the middle layer is preferentially melt-bonded due to the lower melting point of the low melting point COPET, and the surface layer is kept structurally stable due to the higher melting point of the high melting point COPET.
  8. 8. The terylene multicomponent lightweight filament spun-bonded needled non-woven fabric of claim 1, wherein the hot press forming cycle of the non-woven fabric is shortened by 15-30% compared with a common non-woven fabric with the same gram weight.
  9. 9. The polyester multicomponent lightweight filament spunbonded needled nonwoven fabric as claimed in claim 1, wherein the nonwoven fabric is recyclable and can be recycled to fiber or other shaped articles by melt granulation after recycling.
  10. 10. The polyester multicomponent lightweight filament spun-bonded needled nonwoven fabric of claim 1, wherein the nonwoven fabric is used for compression molding of automobile roofs, hatracks, spare tire covers, trunk side trim panels, or bottom shields.

Description

Polyester multicomponent lightweight filament spun-bonded needled non-woven fabric Technical Field The invention relates to the technical field of non-woven fabrics, in particular to a terylene multicomponent light-weight long-fiber spun-bonded needle-punched non-woven fabric which is particularly suitable for application fields with high requirements on light weight and recoverability, such as automotive interiors, compression molding parts and the like. Background With the rapid development of the automobile industry, light weight has become one of the important ways of energy conservation and emission reduction. The traditional nonmetallic materials for automobiles are mostly injection molded or compression molded, and the density of the used materials such as PP, ABS, glass fiber reinforced composite materials and the like is generally above 0.9g/cm < 3 >. Although the strength and impact resistance of the material can be improved by adding glass fibers, when the automobile is scrapped or parts are replaced, the material is difficult to recycle and reuse, and environmental pollution and resource waste are caused. Although the carbon fiber composite material has remarkable advantages in light weight, the carbon fiber composite material is applied to the fields of high-end sports cars and the like, the recycling difficulty is higher, even if the carbon fiber composite material is crushed into short fibers, the short fibers can only be used as a filler for degradation, the performance is greatly reduced, and the true recycling economy is difficult to realize, so that the carbon fiber composite material cannot be popularized and applied in common car types. In the field of non-woven fabrics, the existing spunbonded needled non-woven fabrics are compounded by adopting single component or multiple layers of homogeneous materials, and when the gram weight reaches more than 2000g/m < 2 >, the technical problems are that the internal part of the material is heated unevenly, the middle layer is easy to delaminate, the surface layer is easy to peel or foam due to overheating when the pressure maintaining time is prolonged for improving the internal bonding effect, and the molding process window is narrow, so that the product quality is difficult to control. These drawbacks limit the use of high grammage nonwoven fabrics in the field of automotive moldings. Therefore, a novel non-woven fabric material which not only can realize light weight and has good compression molding performance, but also can be recycled is developed, and the novel non-woven fabric material has important practical significance and market value. Disclosure of Invention Aiming at the defects of the prior art, the invention provides the terylene multicomponent lightweight filament spun-bonded needle punched non-woven fabric which has the advantages of remarkable lightweight effect, excellent compression molding performance, good physical and mechanical properties, environmental protection, recycling and the like, and solves the technical problems that the inside of the non-woven fabric with high gram weight is easy to delaminate, the surface is easy to peel, the molding cycle is difficult to control, and the traditional nonmetallic material for automobiles has high density and is difficult to recycle in the prior art. In order to achieve the above purpose, the present invention provides the following technical solutions: the terylene multicomponent light filament spun-bonded needled non-woven fabric is formed by cross lapping and needling shaping of a plurality of layers of single nets, wherein the surface density gram weight range is 1000-4000g/m < 2 >, and the density is below 0.6g/cm <3 >; The single-web is a multi-component composite fiber web, the fiber structure is one or the combination of two of sheath-core type, stripping type or parallel type, the fiber material consists of PET and various COPET, wherein the melting point range of the PET component is 220-260 ℃, and the melting point range of the COPET component is 150-215 ℃; The single net is divided into a left part, a middle part and a right part along the width direction, the COPET melting point of the fibers of the left part and the right part is the same and higher than that of the fibers of the middle part, and the COPET melting point of the fibers of the middle part is 10-40 ℃ lower than that of the fibers of the left part and the right part. Further, the gram weight of the single net is in the range of 80-300g/m2, and the single net gate width is in the range of 1.3-2.5 m. Further, the range of the gate width of the non-woven fabric after being subjected to cross lapping and needling molding is 2.5-5 meters. Further, the core layer of the sheath-core structure is high-melting PET, the sheath layer is low-melting COPET, and in the peeling-off or parallel-type structure, one component is high-melting PET, and the other component is low-melting COPET. Further, the single net is p