CN113427861A - Multi-layer elastic cloth material and manufacturing method thereof - Google Patents
Multi-layer elastic cloth material and manufacturing method thereof Download PDFInfo
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- CN113427861A CN113427861A CN202010206986.3A CN202010206986A CN113427861A CN 113427861 A CN113427861 A CN 113427861A CN 202010206986 A CN202010206986 A CN 202010206986A CN 113427861 A CN113427861 A CN 113427861A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/02—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by structural features of a fibrous or filamentary layer
- B32B5/022—Non-woven fabric
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/36—Layered products comprising a layer of synthetic resin comprising polyesters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B38/00—Ancillary operations in connection with laminating processes
- B32B38/0012—Mechanical treatment, e.g. roughening, deforming, stretching
- B32B2038/0028—Stretching, elongating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0276—Polyester fibres
- B32B2262/0284—Polyethylene terephthalate [PET] or polybutylene terephthalate [PBT]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/554—Wear resistance
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/558—Impact strength, toughness
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Abstract
A method for manufacturing a multi-layer elastic cloth material comprises the following steps: preparing an elastic film and two single-transverse-direction high-ductility non-woven fabrics, wherein the elastic film is made of thermoplastic polyester elastomer and has the basis weight of 20-50 gsm, and each single-transverse-direction high-ductility non-woven fabric is made of a plurality of polyethylene terephthalate fibers and has single-transverse-direction high ductility after elastic processing, and the basis weight is 20-50 gsm; and two single-transverse-direction high-ductility non-woven fabrics are respectively combined on the upper surface and the lower surface of the elastic film to form a multi-layer elastic cloth material, wherein the one-kilogram elongation is 50-200%, the ultimate elongation is 200-500%, the ultimate tensile strength is 1-3 kilograms, and the deformation rate is 3-10%. Therefore, the multi-layer elastic cloth material has the characteristics of good wear resistance, good flame resistance, good toughness, washing resistance, single-transverse or transverse and longitudinal recovery or elasticity, recyclability and the like.
Description
Technical Field
The invention relates to an elastic cloth material and a manufacturing method thereof, in particular to a multi-layer elastic cloth material which can be unidirectionally or bidirectionally expanded and a manufacturing method thereof.
Background
The non-woven fabric is also called non-woven fabric, and is a kind of cloth material produced by treating various fiber raw materials with a needle-punching machine or a carding machine and by high-pressure or bonding. Polypropylene fibers are one of the most common materials used to make nonwoven fabrics.
However, polypropylene fibers have problems in that: poor abrasion resistance, poor flame resistance, poor toughness and poor resistance to washing, and nonwoven fabrics made of polypropylene fibers also have the above problems.
Furthermore, nonwoven fabrics made from polypropylene fibers generally do not have recovery or elasticity.
Disclosure of Invention
The invention mainly aims to provide a multi-layer elastic cloth material and a manufacturing method thereof, and the manufactured multi-layer elastic cloth material has the characteristics of good wear resistance, good flame resistance, good toughness, washing resistance and the like.
Another objective of the present invention is to provide a multi-layer elastic fabric and a method for manufacturing the same, wherein the multi-layer elastic fabric has a single-transverse or transverse and longitudinal recovery or elasticity.
Another objective of the present invention is to provide a multi-layer elastic fabric and a method for manufacturing the same, wherein the multi-layer elastic fabric has recyclable and reusable environmental protection characteristics, and meets the concept of recycling economy.
In order to achieve the above object, the present invention provides a method for manufacturing a multi-layer elastic fabric, comprising the steps of:
the preparation method comprises the following steps: preparing an elastic film and two single-transverse-direction high-ductility non-woven fabrics, wherein the elastic film is composed of a thermoplastic polyester elastomer, the basis weight of the elastic film is 20-50 gsm, each single-transverse-direction high-ductility non-woven fabric is composed of a plurality of polyethylene terephthalate fibers and has single-transverse-direction high ductility after elastic processing, and the basis weight of each single-transverse-direction high-ductility non-woven fabric is 20-50 gsm; and
combining steps: the single-transverse high-ductility non-woven fabric is respectively combined on the upper surface and the lower surface of the elastic film to form a multi-layer elastic cloth material, the one-kilogram elongation of the multi-layer elastic cloth material is 50-200%, the ultimate elongation of the multi-layer elastic cloth material is 200-500%, the ultimate tensile strength of the multi-layer elastic cloth material is 1-3 kilograms, and the deformation rate of the multi-layer elastic cloth material is 3-10%.
Preferably, in the preparing step, the transverse width of the elastic film is equal to the transverse width of the single transverse high-extensibility nonwoven fabric, and the longitudinal length of the elastic film is equal to the longitudinal length of the single transverse high-extensibility nonwoven fabric; and wherein, in the bonding step, the single-transverse-direction high-extensibility nonwoven fabric is flatly bonded to the upper surface and the lower surface of the elastic film, respectively, so that the multi-layer elastic cloth material has single-transverse-direction high extensibility.
Preferably, in the preparing step, the transverse width of the elastic film is equal to the transverse width of the single transverse high-extensibility nonwoven fabric, the longitudinal length of the single transverse high-extensibility nonwoven fabric is equal, and the longitudinal length of the elastic film before stretching is less than the longitudinal length of the single transverse high-extensibility nonwoven fabric; wherein, a stretching step is further included between the preparation step and the bonding step: stretching the elastic film in the longitudinal direction so that the stretched longitudinal length of the elastic film is equal to the longitudinal length of the single-transverse-direction high-ductility nonwoven fabric; in the combination step, the single transverse direction high-ductility non-woven fabric is respectively combined on the upper surface and the lower surface of the stretched elastic film to form an expanded multi-layer elastic cloth material; and wherein, after the combining step, further comprising a shrinking step: the longitudinal length of the elastic film after being stretched is recovered to the longitudinal length of the elastic film before being stretched by the elastic force generated after the elastic film is stretched, and the longitudinal length of the single transverse high-extensibility nonwoven fabric is contracted to be equal to the longitudinal length of the elastic film before being stretched to form a plurality of wave-shaped structures, so that the multi-layer elastic cloth has transverse and longitudinal high extensibility.
Preferably, in the bonding step, the single-transverse-direction high-ductility nonwoven fabric is bonded to the upper surface and the lower surface of the elastic film by means of ultrasonic waves, hot melt adhesives, casting, hot pressing, or the like.
Preferably, in the preparing step, the basis weight of the elastic film is 30gsm, and the basis weight of each single-transverse-direction high-extensibility non-woven fabric is 35 gsm; in the combining step, the one-kilogram elongation of the multi-layer elastic cloth material is 150%, the ultimate elongation of the multi-layer elastic cloth material is 250%, the ultimate tensile strength of the multi-layer elastic cloth material is 2 kilograms, and the deformation rate of the multi-layer elastic cloth material is 6%.
Preferably, the preparation step further comprises an elastic processing step before the preparation step, comprising the following substeps:
a send-out substep: a heat-bonded nonwoven fabric made of a plurality of polyethylene terephthalate fibers is used as a raw fabric, and the raw fabric is sent out from a sending wheel;
a pressing substep: the original cloth is wound in an S shape and passes through two coiling wheels of a front pressing coiling shaft, and the two coiling wheels of the front pressing coiling shaft press the original cloth;
a heat treatment substep: a heat treatment device heats the original cloth, the heating temperature is controlled between 190 ℃ and 260 ℃, the thermal softening point of the polyethylene terephthalate fiber is 190 ℃, and the melting point of the polyethylene terephthalate fiber is 260 ℃;
a stretching sub-step: the original cloth is wound in an S shape and passes through a back pressing and winding shaft, the original cloth is longitudinally stretched through a fixed speed ratio of the front pressing and winding shaft to the back pressing and winding shaft, and the stretching speed ratio is controlled to be less than 10 meters per minute per meter of original cloth extension, so that the width of the original cloth is reduced to be less than 60 percent of the initial width of the original cloth; and
and a finished product harvesting substep: the raw cloth is wound by a finished product winding wheel to obtain a single-transverse-direction high-ductility non-woven fabric, wherein the single-transverse-direction high-ductility non-woven fabric has transverse ductility of more than 100% and has resilience of more than 50%.
In order to achieve the above object, the present invention provides a multi-layer elastic fabric, which comprises an elastic film and two single-direction high-extensibility nonwoven fabrics. The elastic film is made of thermoplastic polyester elastomer, has a basis weight of 20-50 gsm, and has an upper surface and a lower surface. The single-transverse-direction high-extensibility nonwoven fabric is composed of a plurality of polyethylene terephthalate fibers, has a basis weight of 20-50 gsm, has single-transverse-direction high extensibility after elastic processing, and is respectively combined on the upper surface and the lower surface of the elastic film. Wherein, the one-kilogram elongation of the multi-layer elastic cloth material is 50-200%, the ultimate elongation of the multi-layer elastic cloth material is 200-500%, the ultimate tensile strength of the multi-layer elastic cloth material is 1-3 kilograms, and the deformation rate of the multi-layer elastic cloth material is 3-10%.
Preferably, the transverse width of the elastic film is equal to the transverse width of the single transverse high-extensibility nonwoven fabric, the longitudinal length of the elastic film is equal to the longitudinal length of the single transverse high-extensibility nonwoven fabric, and the single transverse high-extensibility nonwoven fabric is flatly attached to the upper surface and the lower surface of the elastic film, respectively, so that the multi-layer elastic cloth material has single transverse high extensibility.
Preferably, the transverse width of the elastic film is equal to the single transverse high-extensibility nonwoven fabric, the longitudinal length of the elastic film before being stretched is less than the longitudinal length of the single transverse high-extensibility nonwoven fabric, after the single transverse high-extensibility nonwoven fabric is bonded to the upper surface and the lower surface of the stretched elastic film, the longitudinal length of the elastic film after being stretched is restored to the transverse width of the elastic film by the elastic force generated after the elastic film is stretched, the longitudinal length of the single transverse high-extensibility nonwoven fabric is equal to the longitudinal length of the elastic film before being stretched, and the longitudinal length of the single transverse high-extensibility nonwoven fabric is contracted to be equal to the longitudinal length of the elastic film before being stretched to form a plurality of wave-like structures, so that the multi-layer elastic fabric has transverse and longitudinal high extensibility.
Preferably, the basis weight of the elastic film is 30gsm, the basis weight of each single-transverse-direction high-extensibility non-woven fabric is 35gsm, the one-kilogram elongation of the multi-layer elastic cloth material is 150%, the ultimate elongation of the multi-layer elastic cloth material is 250%, the ultimate tensile strength of the multi-layer elastic cloth material is 2 kilograms, and the deformation rate of the multi-layer elastic cloth material is 6%.
The invention has the advantages that the single-transverse-direction high-ductility non-woven fabric is made of polyethylene terephthalate fiber, and the polyethylene terephthalate fiber has the characteristics of good wear resistance, good flame resistance, good toughness, washing resistance and the like, so that the multi-layer elastic cloth material of the invention takes two single-transverse-direction high-ductility non-woven fabrics as the outer layers, and the wear resistance, the flame resistance, the toughness, the washing resistance and the like of the multi-layer elastic cloth material of the invention can be improved.
Generally, the crosswise direction, i.e., the extending direction of the weft of the cloth, and the lengthwise direction, i.e., the extending direction of the warp of the cloth, the single-crosswise direction high-extensibility nonwoven fabric has high extensibility in the extending direction of the weft. The multilayer elastic cloth material of the invention uses two single transverse high-ductility non-woven fabrics as outer layers and matches with the elastic film as an inner layer, so that one embodiment of the multilayer elastic cloth material of the invention has high ductility in the extending direction of weft yarns, and the other embodiment of the multilayer elastic cloth material of the invention has high ductility in the extending direction of the weft yarns and the extending direction of warp yarns. Therefore, one embodiment of the multi-layer elastic fabric of the present invention has a slight recovery or elasticity in the single transverse direction due to its deformation rate, and another embodiment of the multi-layer elastic fabric of the present invention has a slight recovery or elasticity in both the transverse direction and the longitudinal direction due to its deformation rate.
It is well known that materials such as thermoplastic polyester elastomer and polyethylene terephthalate are environmentally friendly and can be recycled. The multilayer elastic material takes the elastic film as an inner layer and two single-transverse-direction high-ductility non-woven fabrics as outer layers, the elastic film is made of thermoplastic polyester elastomer, and the two single-transverse-direction high-ductility non-woven fabrics are made of polyethylene terephthalate.
Drawings
Fig. 1 is a flowchart of a method for manufacturing a multilayered elastic fabric of the present invention according to a first embodiment.
Fig. 2 is a flowchart of the elastic processing steps of the first and second embodiments of the method for producing a multilayered elastic fabric of the present invention.
Fig. 3 is a schematic view of the elastic processing steps of the first and second embodiments of the method for producing a multilayered elastic fabric of the present invention.
Fig. 4 is a schematic view of a preparation step of the first embodiment of the method for producing a multilayered elastic fabric of the present invention.
Fig. 5 is a schematic view of the bonding step of the first embodiment of the method for producing a multilayered elastic fabric of the present invention.
Fig. 6 is a flowchart of a method for manufacturing a multilayered elastic fabric according to a second embodiment of the present invention.
Fig. 7 is a schematic view of preparation step S2A of the method for manufacturing a multilayered elastic fabric of the present invention according to the second embodiment.
Fig. 8 is a schematic view of the stretching step of the second embodiment of the method for producing a multilayered elastic fabric of the present invention.
Fig. 9 is a schematic view showing a bonding step in the second embodiment of the method for producing a multilayered elastic fabric of the present invention.
Fig. 10 is a schematic view of the contraction step of the second embodiment of the method for producing a multi-layer elastic fabric material of the present invention.
Description of the reference numerals
1: raw cloth
2 sending wheel
3, front pressing winding shaft
301 winding wheel
4: heat treatment apparatus
5, post-pressing coiling shaft
501 coiling wheel
6, finished product take-up wheel
10,10A multi-layer elastic cloth material
110,110A elastic film
111,111A upper surface
112,112A lower surface
120,120A single transverse direction high ductility non-woven fabric
121A wave-shaped structure
L1 longitudinal Length of elastic film
L1A longitudinal Length of elastic film before stretching
L1B longitudinal Length of stretched elastic film
L2, L2A longitudinal Length of Single Cross Direction highly extensible nonwoven
S1, S1A elastic processing step
S11 sub-sending step
S12 pressing substep
S13 substep of Heat treatment
S14 stretching sub-step
S15 substep of finished product collection
S2, S2A preparation step
S3, S4A combination step
S3A stretching step
S5A shrinking step
W1, W1A transverse Width of elastic film
W2, W2A transverse width of single transverse high-extensibility non-woven fabric
Detailed Description
The embodiments of the present invention will be described in more detail with reference to the drawings and reference numerals, so that those skilled in the art can implement the embodiments of the present invention after studying the specification.
Referring to fig. 1 to 5, a flow chart of a first embodiment of the method for manufacturing a multi-layer elastic cloth 10, a flow chart and a schematic diagram of an elastic processing step S1 of the first embodiment and the second embodiment, a schematic diagram of a preparation step S2 of the first embodiment, and a schematic diagram of a combination step S3 are respectively shown. The invention provides a method for manufacturing a multilayer elastic cloth material 10, which comprises the following steps:
the elastic processing step S1 includes the following substeps:
send-out sub-step S11: a heat-bonded nonwoven fabric composed of a plurality of polyethylene terephthalate (PET) fibers is used as a raw fabric 1, and the raw fabric 1 is sent out from a sending wheel 2. The thermally bonded nonwoven fabric is produced by a spun-bonding method, a hot-pressing method, a hot-air method, a melt-blowing method or a combination thereof and has a thermoplastic elastic film laminated, coated or bonded thereto.
Pressing substep S12: the raw cloth 2 is wound in an S-shape by passing through the two take-up wheels 301 of a front press take-up shaft 3, and the two take-up wheels 301 of the front press take-up shaft 3 press the raw cloth 1.
Heat treatment substep S13: a heat treatment device 4 heats the original cloth 1, the heating temperature is controlled between 190 ℃ and 260 ℃, the thermal softening point of the polyethylene terephthalate fiber is 190 ℃, and the melting point of the polyethylene terephthalate fiber is 260 ℃.
Stretching substep S14: the raw cloth 2 is wound in an S-shape by two take-up wheels 501 of a rear press take-up shaft 5, the raw cloth 1 is longitudinally stretched by a fixed front-rear press take-up shaft speed ratio, and a stretching speed ratio is controlled to be less than 10 meters per minute per meter of extension of the raw cloth 1, so that the width of the raw cloth 1 is reduced to less than 60% of the original width of the raw cloth 1.
Finished product collection substep S15: the raw cloth 1 is taken up by a take-up reel 6 to obtain a single-direction high-extensibility nonwoven fabric 120, the single-direction high-extensibility nonwoven fabric 120 having a transverse extensibility of 100% or more and a rebound resilience of 50% or more.
Preferably, the take-up wheel 301 of the front press take-up spindle 3 and the take-up wheel 501 and the finished take-up wheel 6 of the rear press take-up spindle 5 are coated with rubber or other surface substance to increase friction.
Preferably, the take-up speed of the rear press take-up shaft 5 is 1.0 to 1.6 times the take-up speed of the front press take-up shaft 3, the raw cloth 1 is passed through the heat treatment device 4 at a draw speed of 10 to 200 m/min and the draw rate ratio is maintained at less than 10 meters per meter of raw cloth extension per minute.
Preparation step S2: an elastic film 110 and two single-direction high-extensibility nonwoven fabrics 120 are prepared. Elastic film 110 is composed of a thermoplastic polyester elastomer (TPEE for short), and elastic film 110 has a basis weight of 20 to 50gsm (grams/square meter). Each of the single-direction highly extensible nonwovens 120 is composed of a plurality of polyethylene terephthalate (PET) fibers, and has a single-direction high extensibility after being subjected to an elastic process, and the basis weight of each of the single-direction highly extensible nonwovens 120 is 20 to 50gsm (grams/square meter, weight per square meter).
In conjunction with step S3: the single-direction high-extensibility nonwoven 120 is bonded to an upper surface 111 and a lower surface 112 of the elastic film 110, respectively, to form a multi-layer elastic cloth 10. The multi-layer elastic cloth material 10 has an elongation of 50 to 200% per kilogram, the multi-layer elastic cloth material 10 has an ultimate elongation of 200 to 500%, the multi-layer elastic cloth material 10 has an ultimate tensile strength of 1 to 3 kilograms, and the multi-layer elastic cloth material 10 has a deformation rate of 3 to 10%. The deformation rate is the change in length measured after the multi-layer elastic fabric material 10 is stretched to 100% extension and then relaxed one minute.
As shown in fig. 4, in the preparation step S2 of the first embodiment, the transverse width W1 of the elastic film 110 is equal to the transverse width W2 of the single transverse direction high extensibility nonwoven fabric 120, and the longitudinal length L2 of the elastic film 110 is equal to the longitudinal length L1 of the single transverse direction high extensibility nonwoven fabric 120. As shown in fig. 5, in the combining step S3 of the first embodiment, the single-direction high-extensibility nonwoven fabric 120 is flatly adhered to the upper surface 111 and the lower surface 112 of the elastic film 110 by ultrasonic waves, hot melt adhesives, casting, hot pressing, or the like, so that the multi-layer elastic fabric 10 has single-direction high extensibility.
Referring to fig. 6 to 10, a flow chart of a method for manufacturing a multi-layer elastic cloth 10A, a schematic diagram of a preparation step S2A, a schematic diagram of a stretching step S3A, a schematic diagram of a combination step S4A and a schematic diagram of a shrinking step S5A are respectively shown, and fig. 2 and 3 are referenced simultaneously. The elastic processing step S1A of the second embodiment is identical to the elastic processing step S1 of the first embodiment. In the preparation step S2A of the second embodiment, the transverse width W1A of the elastic film 110A is equal to the transverse width W2A of the single transverse direction high-extensibility nonwoven fabric 120A, the longitudinal length L2A of the single transverse direction high-extensibility nonwoven fabric 120A is equal, and the longitudinal length L1A of the elastic film 110A before being stretched is smaller than the longitudinal length L2A of the single transverse direction high-extensibility nonwoven fabric 120A. The second embodiment further includes a stretching step S3A between the preparation step S2A and the bonding step S4A: the elastic film 110A is longitudinally stretched such that the longitudinal length L1B of the elastic film 110A after being stretched is equal to the longitudinal length L2A of the single cross direction high extensibility nonwoven 120A. In the combining step S4A of the second embodiment, the single-transverse-direction high-extensibility nonwoven fabric 120A is respectively combined on the upper surface 111A and the lower surface 112A of the stretched elastic film 110A by ultrasonic or hot melt adhesive or casting or hot pressing, etc. to form an unfolded multi-layer elastic cloth material 10A. After the combining step S4A, the second embodiment further includes a shrinking step S5A: the longitudinal length L1B of the elastic film 110A after being stretched is restored to the longitudinal length L1A of the elastic film 110A before being stretched by the elastic force generated after the elastic film 110A is stretched, and the longitudinal length L2A of the single transverse direction high extensibility nonwoven fabric 120A is contracted to be equal to the longitudinal length L1A of the elastic film 110A before being stretched to form a plurality of wave-like structures 121A, so that the multi-layer elastic cloth 10A has transverse direction and longitudinal direction high extensibility.
Preferably, in the preparation step S2A of the second embodiment, the longitudinal length L2A of the single-transverse-direction high-extensibility nonwoven fabric 120A is N times, N ≧ 2, the longitudinal length L1A of the elastic film 110A before being stretched. Therefore, in the shrinking step S5A of the second embodiment, the longitudinal length of the single-transverse-direction high-extensibility nonwoven fabric 120A is shortened by N times, and the multi-layer elastic fabric material 10A can have N times of transverse extensibility.
In the preparation steps S2, S2A of the first and second embodiments, the basis weight of the elastic films 110,110A is 30gsm, and the basis weight of each of the unidirectional high-extensibility nonwoven fabrics 120,120A is 35 gsm. In the combining steps S3 and S4A of the first and second embodiments, the multi-layer elastic cloth material 10,10A has an elongation of 150% per kg, the multi-layer elastic cloth material 10,10A has an ultimate elongation of 250%, the multi-layer elastic cloth material 10,10A has an ultimate tensile strength of 2 kg, and the multi-layer elastic cloth material 10,10A has a deformation rate of 6%.
As shown in fig. 4 and 5, the present invention provides a multi-layer elastic fabric 10, which comprises an elastic film 110 and two single-direction high-extensibility nonwoven fabrics 120. Elastic film 110 is made of thermoplastic polyester elastomer (TPEE), has a basis weight of 20 to 50gsm (grams/square meter), and has an upper surface 111 and a lower surface 112. Each of the single-direction highly extensible nonwovens 120 is formed of a plurality of polyethylene terephthalate (PET) fibers, has a basis weight of 20 to 50gsm (weight per square meter), has a single-direction high extensibility after being elastically processed, and is bonded to the upper surface 111 and the lower surface 112 of the elastic film 110, respectively. The multi-layer elastic cloth material 10 has an elongation of 50 to 200% per kilogram, the multi-layer elastic cloth material 10 has an ultimate elongation of 200 to 500%, the multi-layer elastic cloth material 10 has an ultimate tensile strength of 1 to 3 kilograms, and the multi-layer elastic cloth material 10 has a deformation rate of 3 to 10%.
In the first embodiment, the transverse width W1 of the elastic film 110 is equal to the transverse width W2 of the single transverse direction high extensibility nonwoven 120, and the longitudinal length L2 of the elastic film 110 is equal to the longitudinal length L1 of the single transverse direction high extensibility nonwoven 120. The single-direction high-extensibility nonwoven 120 is flatly attached to the upper surface 111 and the lower surface 112 of the elastic film 110, respectively, so that the multi-layer elastic fabric has single-direction high extensibility.
As shown in fig. 7 to 10, in the second embodiment, the transverse width W1A of the elastic film 110A is equal to the transverse width W2A of the single transverse high-extensibility nonwoven 120A, the longitudinal length L2A of the single transverse high-extensibility nonwoven 120A is equal, and the longitudinal length L1A of the elastic film 110A before being stretched is smaller than the longitudinal length L2A of the single transverse high-extensibility nonwoven 120A. After the single transverse direction high extensibility nonwoven fabric 120 is bonded to the upper surface 111 and the lower surface 112 of the elastic film 110 after being stretched, the longitudinal length L1B of the elastic film 110A after being stretched is restored to the longitudinal length L1A of the elastic film 110A before being stretched by the elastic force generated after the elastic film 110 is stretched, and the longitudinal length L2A of the single transverse direction high extensibility nonwoven fabric 120A is contracted to be equal to the longitudinal length L1A of the elastic film 110 before being stretched to form a plurality of wave-like structures 121A, so that the multi-layer elastic fabric 10A has transverse direction and longitudinal direction high extensibility.
Preferably, in the second embodiment, the longitudinal length L2A of the single-transverse-direction high-extensibility nonwoven fabric 120A is N times, N ≧ 2, the longitudinal length L1A of the elastic film 110A before stretching. Therefore, the longitudinal length of the single-transverse high-extensibility nonwoven fabric 120A is shortened by N times, and the multi-layer elastic fabric material 10A can have N times of transverse extensibility.
In the first and second embodiments, the basis weight of the elastic films 110A, 110A is 30gsm, the basis weight of each of the unidirectional high-extensibility nonwoven fabrics 120,120A is 35gsm, the one-kilogram elongation of the multi-layer elastic fabric materials 10,10A is 150%, the ultimate elongation of the multi-layer elastic fabric materials 10,10A is 250%, the ultimate tensile strength of the multi-layer elastic fabric materials 10,10A is 2 kilograms, and the deformation rate of the multi-layer elastic fabric materials 10,10A is 6%.
The single-transverse-direction high- ductility non-woven fabrics 120 and 120A are made of polyethylene terephthalate fibers, and the polyethylene terephthalate fibers have the characteristics of good wear resistance, good flame resistance, good toughness, water washing resistance and the like, so that the multi-layer elastic fabrics 10 and 10A of the invention take the two single-transverse-direction high- ductility non-woven fabrics 120 and 120A as outer layers, and the characteristics of the multi-layer elastic fabrics 10 and 10A of the invention, such as wear resistance, flame resistance, toughness, water washing resistance and the like, can be improved.
Generally, the cross direction is the extending direction of the weft of the cloth, the machine direction is the extending direction of the warp of the cloth, and the single-cross direction high-extensibility nonwoven fabric 120,120A has high extensibility in the extending direction of the weft. The multi-layer elastic cloth 10,10A of the present invention has high extensibility in the extending direction of the weft yarns by using two single-transverse high-extensibility nonwovens 120,120A as the outer layers, and the elastic films 110,110A as the inner layers, and the multi-layer elastic cloth 10A of the present invention has high extensibility in the extending direction of the weft yarns and in the extending direction of the warp yarns. Therefore, the multi-layer elastic fabric 10 of the present invention can have slight recovery or elasticity in the single transverse direction by the deformation ratio thereof, and the multi-layer elastic fabric 10A of the present invention can have slight recovery or elasticity in both the transverse direction and the longitudinal direction by the deformation ratio thereof.
It is well known that materials such as thermoplastic polyester elastomer and polyethylene terephthalate are environmentally friendly and can be recycled. The multi-layer elastic material 10,10A uses the elastic film 110,110A as the inner layer and the two single transverse high-ductility non-woven fabrics 120,120A as the outer layer, the elastic film 110,110A is made of thermoplastic polyester elastomer, and the two single transverse high-ductility non-woven fabrics 120,120A are made of polyethylene terephthalate, so the multi-layer elastic material 10,10A of the present invention has the environmental protection characteristic of recycling and reusing, and conforms to the concept of recycling economy.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting thereof, since any modification or variation thereof within the spirit of the invention is intended to be covered thereby.
Claims (10)
1. A method for manufacturing a multi-layer elastic cloth material is characterized by comprising the following steps:
the preparation method comprises the following steps: preparing an elastic film and two single-transverse-direction high-ductility non-woven fabrics, wherein the elastic film is composed of a thermoplastic polyester elastomer, the basis weight of the elastic film is 20-50 gsm, each single-transverse-direction high-ductility non-woven fabric is composed of a plurality of polyethylene terephthalate fibers and has single-transverse-direction high ductility after elastic processing, and the basis weight of each single-transverse-direction high-ductility non-woven fabric is 20-50 gsm; and
combining steps: the single-transverse high-ductility non-woven fabric is respectively combined on the upper surface and the lower surface of the elastic film to form a multi-layer elastic cloth material, the one-kilogram elongation of the multi-layer elastic cloth material is 50-200%, the ultimate elongation of the multi-layer elastic cloth material is 200-500%, the ultimate tensile strength of the multi-layer elastic cloth material is 1-3 kilograms, and the deformation rate of the multi-layer elastic cloth material is 3-10%.
2. The method of manufacturing a multi-layered elastic fabric material as set forth in claim 1, wherein in the preparing step, the transverse width of the elastic film is equal to the transverse width of the single transverse high-extensibility nonwoven fabric, and the longitudinal length of the elastic film is equal to the longitudinal length of the single transverse high-extensibility nonwoven fabric; and in the combining step, the single-transverse-direction high-ductility non-woven fabric is flatly attached to the upper surface and the lower surface of the elastic film respectively, so that the multi-layer elastic cloth has single-transverse-direction high ductility.
3. The method of manufacturing a multi-layered elastic fabric according to claim 1, wherein in the preparing step, the transverse width of the elastic film is equal to the transverse width of the single transverse direction high extensibility nonwoven fabric, the longitudinal length of the single transverse direction high extensibility nonwoven fabric is equal, and the longitudinal length of the elastic film before being stretched is smaller than the longitudinal length of the single transverse direction high extensibility nonwoven fabric; wherein, a stretching step is further included between the preparing step and the combining step: stretching the elastic film in the longitudinal direction so that the stretched longitudinal length of the elastic film is equal to the longitudinal length of the single-transverse-direction high-ductility non-woven fabric; wherein, in the combining step, the single-transverse-direction high-ductility non-woven fabric is respectively combined on the upper surface and the lower surface of the stretched elastic film to form an expanded multi-layer elastic cloth material; and wherein, after the combining step, a shrinking step is further included: the longitudinal length of the elastic film after being stretched is recovered to the longitudinal length of the elastic film before being stretched by the elastic force generated after the elastic film is stretched, and the longitudinal length of the single-transverse-direction high-extensibility nonwoven fabric is contracted to be equal to the longitudinal length of the elastic film before being stretched to form a plurality of wavy structures, so that the multi-layer elastic cloth has transverse-direction and longitudinal-direction high extensibility.
4. The method as claimed in any one of claims 1 to 3, wherein in the bonding step, the single-direction high-extensibility nonwoven fabric is bonded to the upper surface and the lower surface of the elastic film by ultrasonic or hot melt adhesive or by casting or hot pressing, respectively.
5. The method of producing a multilayered elastic fabric according to any one of claims 1 to 3, wherein in the preparing step, the basis weight of the elastic film is 30gsm, and the basis weight of each of the unidirectional high-extensibility nonwoven fabrics is 35 gsm; in the combining step, the multi-layer elastic cloth has an elongation of 150% per kilogram, an ultimate elongation of 250% per kilogram, an ultimate tensile strength of 2 kg per kilogram, and a deformation rate of 6% per kilogram.
6. A method for manufacturing a multi-layer elastic fabric as claimed in any one of claims 1 to 3, further comprising an elastic processing step before the preparation step, comprising the following substeps:
a send-out substep: a heat-bonded nonwoven fabric made of a plurality of polyethylene terephthalate fibers is used as a raw fabric, and the raw fabric is sent out from a sending wheel;
a pressing substep: the original cloth is wound in an S shape and passes through two coiling wheels of a front pressing coiling shaft, and the two coiling wheels of the front pressing coiling shaft press the original cloth;
a heat treatment substep: a heat treatment device heats the raw cloth, the heating temperature is controlled between 190 ℃ and 260 ℃, the thermal softening point of the polyethylene terephthalate fiber is 190 ℃, and the melting point of the polyethylene terephthalate fiber is 260 ℃;
a stretching sub-step: the raw cloth is wound in an S shape and passes through a back pressing and winding shaft, the raw cloth is longitudinally stretched by a fixed speed ratio of the front pressing and winding shaft to the back pressing and winding shaft, and a stretching speed ratio is controlled to be less than 10 meters per minute per meter of raw cloth extension, so that the width of the raw cloth is reduced to be less than 60 percent of the initial width of the raw cloth; and
and a finished product harvesting substep: the raw cloth is wound by a finished product winding wheel to obtain a single-transverse-direction high-extensibility non-woven fabric, which has transverse extensibility of more than 100% and rebound resilience of more than 50%.
7. A multi-layer elastic fabric material, comprising:
an elastic film made of thermoplastic polyester elastomer, having a basis weight of 20 to 50gsm, and having an upper surface and a lower surface; and
two single-transverse-direction high-ductility non-woven fabrics, which are respectively composed of a plurality of polyethylene terephthalate fibers, have a basis weight of 20-50 gsm, have single-transverse-direction high ductility after elastic processing, and are respectively combined on the upper surface and the lower surface of the elastic film;
the multi-layer elastic cloth has an elongation of 50-200% per kilogram, an ultimate elongation of 200-500% per kilogram, an ultimate tensile strength of 1-3 kilograms, and a deformation rate of 3-10%.
8. The multi-layer elastic fabric of claim 7, wherein the transverse width of the elastic film is equal to the transverse width of the single transverse high-extensibility nonwoven fabric, the longitudinal length of the elastic film is equal to the longitudinal length of the single transverse high-extensibility nonwoven fabric, and the single transverse high-extensibility nonwoven fabric is flatly attached to the upper surface and the lower surface of the elastic film, respectively, so that the multi-layer elastic fabric has single transverse high extensibility.
9. A multi-layer elastic fabric material as defined in claim 7, wherein said elastic film has a transverse width equal to said single transverse direction high extensibility nonwoven fabric or the like, the longitudinal length of the elastic film before stretching is smaller than that of the single-transverse-direction high-extensibility nonwoven fabric, after the single-direction high-extensibility nonwoven fabric is combined on the upper surface and the lower surface of the elastic film after being stretched, by means of the elasticity generated after the elastic film is stretched, the stretched longitudinal length of the elastic film returns to the transverse width of the elastic film, the longitudinal length of the single transverse high-extensibility nonwoven fabric is the longitudinal length before stretching, the single transverse direction high extensibility non-woven fabric is contracted to be equal to the longitudinal direction length of the elastic film before being stretched to form a plurality of wave-like structures, so that the multi-layer elastic cloth material has transverse direction and longitudinal direction high extensibility.
10. The multi-layer elastic fabric according to any one of claims 7 to 9, wherein the basis weight of the elastic film is 30gsm, the basis weight of each of the unidirectional high-extensibility nonwoven fabrics is 35gsm, the multi-layer elastic fabric has an elongation of 150% per kilogram, the multi-layer elastic fabric has an ultimate elongation of 250%, the multi-layer elastic fabric has an ultimate tensile strength of 2 kg, and the multi-layer elastic fabric has a deformation rate of 6%.
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