Extrusion-coating bonding composite material and production equipment and process thereof

Abstract

According to the extrusion-coating bonding composite material and the production equipment and process thereof, a bonding layer is made of a molten polymer, pollution to the environment is reduced, the extrusion-coating bonding composite material is more environmentally friendly, meanwhile, the bonding layer is made of the same material as a bonded material, the compatibility of the bonding layer with first base cloth and second base cloth is better, and the bonding layer is more stable. And the bonding strength of the bonding layer with the first base cloth and the second base cloth is higher.

Description

Technical Field

[0001] The invention relates to the technical field of nonwoven fabrics, and in particular to an extrusion-bonded composite material and a production device and process thereof. Background Art

[0002] Composite non-woven fabrics are made by laminating or bonding two or more non-woven fabrics or other materials of different materials and properties together through a composite process to form a new material with comprehensive performance advantages. This composite method not only retains the advantages of each raw material, but also creates new performance advantages, such as giving the material higher strength, excellent barrier properties, high resistance to hydrostatic pressure, etc., so as to meet the high requirements for material performance in many fields such as medical care and modern industry.

[0003] At present, composite non-woven fabrics are generally made by spraying glue, ultrasonic bonding, hot pressing bonding and laminating bonding. Among them, the adhesive bonding has a large bonding force, but the disadvantages are that the glue has certain harm to the environment and humans and has low air permeability, the production speed of ultrasonic bonding is slow, the noise is harsh and the equipment is expensive, the bonding force of hot pressing bonding is not high, the composite non-woven fabric is easy to peel off, and the barrier performance of laminating composite non-woven fabric is high, but the air permeability is poor. The announcement number is CN117166141A, which discloses a composite elastic non-woven fabric production process and equipment, including the following steps: S1: heating and melting the mixed raw materials to achieve mixing; S2: injecting the mixed raw materials into the production equipment to achieve temporary storage, and further mixing and heating at the same time; S3: spraying, while allowing the hotter liquid to solidify at a faster speed to form interlaced fiber filaments, and at the same time achieve bonding; S4: pressing to tighten; S5: heating to a predetermined temperature, pressing at the same time to ensure the bonding between the materials; S6: rapid cooling and solidification again. The non-woven fabric adopts a spraying process to achieve multi-layer bonding of the non-woven fabric, but this method makes the composite non-woven fabric have low air permeability and average overall performance. Summary of the invention

[0004] In view of the deficiencies of the prior art, the object of the present invention is to provide an environmentally friendly extrusion-bonded composite material and a production device and process thereof.

[0005] To achieve the above object, the present invention provides a solution: an extrusion-bonded composite material, comprising a first substrate, an adhesive layer, and a second substrate, wherein the first substrate, the adhesive layer, and the second substrate are arranged in sequence from top to bottom.

[0006] Furthermore, the material of the first substrate is component A, and the component A is one or more of polypropylene, polyester, polyethylene, polylactic acid, polyurethane, thermoplastic polyester elastomer, and styrene-ethylene / butylene-styrene block copolymer.

[0007] Furthermore, the material of the second substrate is component B, and the component B is one or more of polypropylene, polyester, polyethylene, polylactic acid, polyurethane, thermoplastic polyester elastomer, and styrene-ethylene / butylene-styrene block copolymer.

[0008] Furthermore, the adhesive layer includes a first adhesive layer, a mixed adhesive layer, and a second adhesive layer. The first adhesive layer is bonded to the first substrate, the second adhesive layer is bonded to the second substrate, and the mixed adhesive layer is bonded to the first adhesive layer and the second adhesive layer respectively.

[0009] Furthermore, the first bonding layer and the second bonding layer both include a main material and an auxiliary material, the main material of the first bonding layer is 70-90 parts of component A, the main material of the second bonding layer is 70-90 parts of component B, the auxiliary materials of the first bonding layer and the second bonding layer are one or more of 3-10 parts of elastomer, 5-10 parts of cooling masterbatch, and 1-5 parts of compatibilizer, the extrusion amount of the bonding layer is 2-6g / m2, and the temperature of the extrusion die is 170-190°C. After the present invention adopts the above structure, the material of the main material is the same as the first substrate, so that the first bonding layer can be better bonded to the first substrate, and the material of the main material is the same as the second substrate, so that the second bonding layer can be better bonded to the second substrate.

[0010] Furthermore, the mixed bonding layer is composed of a raw material of a first bonding layer and a raw material of a second bonding layer, and a mass ratio of the raw material of the first bonding layer to the raw material of the second bonding layer is 3:7-5:5.

[0011] The beneficial effects of the present invention are: environmental protection and excellent product performance. Compared with spray-on compounding, the present invention uses molten polymer to make the bonding layer, which reduces pollution to the environment and is more environmentally friendly. At the same time, the bonding layer uses the same material as the bonded material, and has better compatibility with the first substrate and the second substrate, so that the bonding strength between the bonding layer and the first substrate and the second substrate is higher.

[0012] The present invention also includes production equipment for extrusion-coated adhesive composite materials, including a first unwinding mechanism, a second unwinding mechanism, a melt extrusion mechanism, a first laminating mechanism, a cooling roller, a second laminating mechanism, and a winding roller, wherein the first unwinding mechanism is used to output a first substrate to the first laminating mechanism, the second unwinding mechanism is used to output a second substrate to the first laminating mechanism, the melt extrusion mechanism is used to output an adhesive layer to the first laminating mechanism, the first laminating mechanism is used to laminarize the first substrate, the adhesive layer, and the second substrate, and the first laminating mechanism, the cooling roller, the second laminating mechanism, and the winding roller are sequentially arranged along the conveyor. After adopting the above structure, the present invention can realize rapid lamination to obtain an extrusion-coated adhesive composite material, and the extrusion-coated adhesive composite material has excellent performance, strong air permeability and stability, and is easy to operate overall, and can produce composite products on a large scale.

[0013] Furthermore, the first unwinding mechanism includes a first unwinding roller.

[0014] Furthermore, the second unwinding mechanism includes a second unwinding roller.

[0015] Furthermore, the first pressing mechanism comprises a smooth roller and a pattern roller, and the smooth roller and the pattern roller are symmetrically arranged.

[0016] Further, the melt extrusion mechanism includes a feed hopper, a first screw extruder, a second screw extruder, a third screw extruder, and an extrusion die head. Two partitions are provided in the feed hopper. The two partitions divide the feed hopper into a first feed chamber, a second feed chamber, and a third feed chamber. The first feed chamber is connected to the first screw extruder, the second feed chamber is connected to the second screw extruder, and the third feed chamber is connected to the third screw extruder. The first screw extruder, the second screw extruder, and the third screw extruder are respectively connected to the extrusion die head, and the extrusion die head is used to output the bonding layer. After the present invention adopts the above structure, three feed chambers are provided at the setting, and three materials of different materials can be input respectively, that is, materials of the same material can be bonded, and materials of different materials can also be bonded.

[0017] Furthermore, the extrusion die head is formed with a first extrusion channel, a second extrusion channel, and a third extrusion channel, the first screw extruder is connected to the first extrusion channel, the second screw extruder is connected to the second extrusion channel, and the third screw extruder is connected to the third extrusion channel. The end of the extrusion die head is provided with a plurality of first extrusion holes, a plurality of second extrusion holes, and a plurality of third extrusion holes, the plurality of first extrusion holes and the plurality of second extrusion holes are arranged symmetrically, and the plurality of third extrusion holes are arranged between the plurality of first extrusion holes and the plurality of second extrusion holes, the first extrusion channel is connected to the plurality of first extrusion holes, the second extrusion channel is connected to the plurality of second extrusion holes, and the third extrusion channel is connected to the plurality of third extrusion holes. After the present invention adopts the above structure, through the arrangement of the plurality of first extrusion holes, the plurality of second extrusion holes, and the plurality of third extrusion holes, the extruded melt strips are not easy to be entangled, and can be better bonded. The screw extruder can be used to control the amount of adhesive to give the formed adhesive layer higher air permeability.

[0018] Furthermore, the second lamination mechanism comprises two lamination rollers, and the two lamination rollers are symmetrically arranged.

[0019] Furthermore, a plurality of cloth guide rollers are arranged between the second lamination mechanism and the winding roller, and the plurality of cloth guide rollers are arranged in sequence and at intervals along the conveying direction.

[0020] The present invention also includes an extrusion bonding process for composite materials, comprising the following steps: S1. The first unwinding mechanism unwinds and outputs the first substrate to the first laminating mechanism, the second unwinding mechanism unwinds and outputs the second substrate to the first laminating mechanism, and the melt extrusion mechanism outputs the adhesive layer to the first laminating mechanism and squeezes the adhesive layer between the first substrate and the second substrate by melting; S2. The first laminating mechanism performs a first lamination on the first substrate, the adhesive layer and the second substrate to form a composite body; S3. The composite body continues to be conveyed, cooled by a cooling roller, and then the composite body is pressed for a second time by a second laminating mechanism to form an extruded and bonded composite material, which is then wound up by a winding roller.

[0021] Furthermore, in step S1, when the materials of component A and component B are the same, the raw material of the first bonding layer, the raw material of the mixed bonding layer, and the raw material of the second bonding layer are respectively conveyed to the third feeding chamber, then conveyed through the third screw extruder, and extruded through multiple third extrusion holes to form a bonding layer; if the materials of component A and component B are different, the raw material of the first bonding layer is conveyed to the first feeding chamber, the raw material of the second bonding layer is conveyed to the second feeding chamber, and the raw material of the mixed bonding layer is conveyed to the third feeding chamber, and then conveyed through the first screw extruder, the second screw extruder, and the third screw extruder, respectively, and then the first bonding layer is extruded through multiple first extrusion holes, the second bonding layer is extruded through multiple second extrusion holes, and the mixed bonding layer is extruded through multiple third extrusion holes, and the first bonding layer, the second bonding layer, and the mixed bonding layer are combined to form a bonding layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a connection diagram of the production equipment of the present invention.

[0023] Figure 2 It is a schematic diagram of the melt extrusion mechanism of the present invention.

[0024] Figure 3 It is a structural diagram of the end portion of the extrusion die head of the present invention.

[0025] Figure 4 This is a structural diagram of the extrusion-bonded composite material according to the first embodiment of the present invention.

[0026] Figure 5 This is a structural diagram of the extrusion-bonded composite material according to the second embodiment of the present invention.

[0027] Among them, 1 is the first substrate, 2 is the adhesive layer, 21 is the first bonding layer, 22 is the mixed bonding layer, 23 is the second bonding layer, 3 is the second substrate, 41 is the first unwinding roller, 42 is the second unwinding roller, 51 is the smooth roller, 52 is the flower roller, 6 is the melt extrusion mechanism, 61 is the feeding hopper, 611 is the first feeding chamber, 612 is the second feeding chamber, 613 is the third feeding chamber, 614 is the partition plate, 62 is the first screw extruder, 63 is the second screw extruder, 64 is the third screw extruder, 65 is the extrusion die head, 651 is the first extrusion channel, 652 is the second extrusion channel, 653 is the third extrusion channel, 661 is the first extrusion hole, 662 is the second extrusion hole, 663 is the third extrusion hole, 7 is the cooling roller, 8 is the pressing roller, 9 is the winding roller, and 91 is the cloth guide roller. DETAILED DESCRIPTION

[0028] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. Embodiment 1:

[0030] See attached Figure 1 To Attachment Figure 4 As shown, an extrusion-bonded composite material comprises a first substrate 1, an adhesive layer 2, and a second substrate 3, wherein the first substrate 1, the adhesive layer 2, and the second substrate 3 are arranged in sequence from top to bottom.

[0031] In this embodiment, the material of the first substrate 1 is component A, and the material of the second substrate 3 is component B. Component A and component B are both polypropylene.

[0032] In this embodiment, the first substrate 1 made of the above material is formed into a spunbonded nonwoven fabric, and the second substrate 3 made of the above material can be formed into a PP spunbonded nonwoven fabric.

[0033] In this embodiment, the adhesive layer 2 includes a first adhesive layer 21, a mixed adhesive layer 22, and a second adhesive layer 23. The first adhesive layer 21 is bonded to the first substrate 1, the second adhesive layer 23 is bonded to the second substrate 3, and the mixed adhesive layer 22 respectively bonds the first adhesive layer 21 and the second adhesive layer 23.

[0034] Among them, the first bonding layer 21 and the second bonding layer 23 both include main materials and auxiliary materials. The main material of the first bonding layer 21 is 80 parts of component A, and the main material of the second bonding layer 23 is 80 parts of component B. The auxiliary materials of the first bonding layer 21 and the second bonding layer 23 are 8 parts of elastomer and 7 parts of cooling masterbatch; the extrusion amount of the bonding layer 2 is 4g / m2, and the temperature of the extrusion die head 65 is 185°C.

[0035] The present embodiment also includes production equipment for extrusion-bonded composite materials, including a first unwinding mechanism, a second unwinding mechanism, a melt extrusion mechanism 6, a first laminating mechanism, a cooling roller 7, a second laminating mechanism, and a winding roller 9. The first unwinding mechanism is used to output the first substrate 1 to the first laminating mechanism, the second unwinding mechanism is used to output the second substrate 3 to the first laminating mechanism, the melt extrusion mechanism 6 is used to output the adhesive layer 2 to the first laminating mechanism, the first laminating mechanism is used to laminarize the first substrate 1, the adhesive layer 2, and the second substrate 3, and the first laminating mechanism, the cooling roller 7, the second laminating mechanism, and the winding roller 9 are arranged in sequence along the conveyor.

[0036] In this embodiment, the melt extrusion mechanism 6 includes a feed hopper 61, a first screw extruder 62, a second screw extruder 63, a third screw extruder 64, and an extrusion die 65. Two partition plates 614 are arranged in the feed hopper 61. The two partition plates 614 divide the feed hopper 61 into a first feed chamber 611, a second feed chamber 612, and a third feed chamber 613. The first feed chamber 611 is connected to the first screw extruder 62, the second feed chamber 612 is connected to the second screw extruder 63, and the third feed chamber 613 is connected to the third screw extruder 64. The first screw extruder 62, the second screw extruder 63, and the third screw extruder 64 are respectively connected to the extrusion die 65, and the extrusion die 65 is used to output the bonding layer 2.

[0037] In this embodiment, a first extrusion channel 651, a second extrusion channel 652, and a third extrusion channel 653 are formed in the extrusion die 65, the first screw extruder 62 is connected to the first extrusion channel 651, the second screw extruder 63 is connected to the second extrusion channel 652, and the third screw extruder 64 is connected to the third extrusion channel 653. A plurality of first extrusion holes 661, a plurality of second extrusion holes 662, and a plurality of third extrusion holes 663 are opened at the end of the extrusion die 65. The plurality of first extrusion holes 661 and the plurality of second extrusion holes 662 are arranged symmetrically, and the plurality of third extrusion holes 663 are arranged between the plurality of first extrusion holes 661 and the plurality of second extrusion holes 662. The plurality of third extrusion holes 663 form a multi-row structure, and the plurality of third extrusion holes 663 in the same row are sequentially arranged from top to bottom. The first extrusion channel 651 is connected to the plurality of first extrusion holes 661, the second extrusion channel 652 is connected to the plurality of second extrusion holes 662, and the third extrusion channel 653 is connected to the plurality of third extrusion holes 663. The plurality of first extrusion holes 661 form a multi-row structure, and the plurality of first extrusion holes 661 in the same row are sequentially arranged at intervals from top to bottom; The plurality of second extrusion holes 662 form a multi-row structure, and the plurality of second extrusion holes 662 in the same row are arranged in sequence from top to bottom.

[0038] This embodiment also includes an extrusion bonding process for a composite material, comprising the following steps: S1. The first unwinding mechanism, i.e., the first unwinding roller 41, unwinds and outputs the first substrate 1 to the first laminating mechanism, the second unwinding mechanism, i.e., the second unwinding roller 42, unwinds and outputs the second substrate 3 to the first laminating mechanism, and the melt extrusion mechanism 6 outputs the adhesive layer 2 to the first laminating mechanism and squeezes the adhesive layer 2 between the first substrate 1 and the second substrate 3 by melting; Specifically, since the material of component A is the same as that of component B, the raw material of the first bonding layer 21, the raw material of the mixed bonding layer 22, and the raw material of the second bonding layer 23 are all the same and are regarded as the same raw material. Therefore, the raw material of the first bonding layer 21, the raw material of the mixed bonding layer 22, and the raw material of the second bonding layer 23 can be respectively conveyed to the third feeding chamber 651 through a suction pipe in advance, and then conveyed through the third screw extruder 64 and extruded through multiple third extrusion holes 663 to form a bonding layer 2.

[0039] S2. The first lamination mechanism performs the first lamination on the first substrate 1, the adhesive layer 2 and the second substrate 3 to form a composite; specifically, the smooth roller 51 receives the first substrate 1, the pattern roller 52 receives the second substrate 3, and then the adhesive layer 2 is extruded between the first substrate 1 and the second substrate 3 by the melt extrusion mechanism 6 in a melt extrusion manner, so that the first substrate 1 and the second substrate 3 are bonded to form a composite, wherein the bonding method can be continuous, intermittent or spot coating.

[0040] S3. The composite body continues to be conveyed, cooled by the cooling roller 7, and then pressed for the second time by the second pressing mechanism, that is, pressed for the second time by two pressing rollers 8 to form an extruded and bonded composite material, and then guided by multiple guide rollers 91 and wound up by the winding roller 9. Embodiment 2:

[0041] See attached Figure 1 To Attachment Figure 3 , Attachment Figure 5 As shown, an extrusion-bonded composite material comprises a first substrate 1, an adhesive layer 2, and a second substrate 3, wherein the first substrate 1, the adhesive layer 2, and the second substrate 3 are arranged in sequence from top to bottom.

[0042] In this embodiment, the material of the first substrate 1 is component A, the material of the second substrate 3 is component B, component A is polypropylene, and component B is polypropylene.

[0043] In this embodiment, the first substrate 1 made of the above material is formed into a PP spunbonded nonwoven fabric, and the second substrate 3 made of the above material is formed into a PP cast film.

[0044] In this embodiment, the adhesive layer 2 includes a first adhesive layer 21, a mixed adhesive layer 22, and a second adhesive layer 23. The first adhesive layer 21 is bonded to the first substrate 1, the second adhesive layer 23 is bonded to the second substrate 3, and the mixed adhesive layer 22 respectively bonds the first adhesive layer 21 and the second adhesive layer 23.

[0045] Among them, the first bonding layer 21 and the second bonding layer 23 both include main materials and auxiliary materials. The main material of the first bonding layer 21 is 80 parts of component A, and the main material of the second bonding layer 23 is 80 parts of component B. The auxiliary materials of the first bonding layer 21 and the second bonding layer 23 are 8 parts of elastomer and 7 parts of cooling masterbatch; the extrusion amount of the adhesive layer 2 is 4g / m2, and the temperature of the extrusion die 65 is 185°C; the mixed bonding layer 22 is composed of the raw materials of the first bonding layer 21 and the raw materials of the second bonding layer 23, and the mass ratio of the raw materials of the first bonding layer 21 to the raw materials of the second bonding layer 23 is 4:6.

[0046] The present embodiment also includes production equipment for extrusion-bonded composite materials, including a first unwinding mechanism, a second unwinding mechanism, a melt extrusion mechanism 6, a first laminating mechanism, a cooling roller 7, a second laminating mechanism, and a winding roller 9. The first unwinding mechanism is used to output the first substrate 1 to the first laminating mechanism, the second unwinding mechanism is used to output the second substrate 3 to the first laminating mechanism, the melt extrusion mechanism 6 is used to output the adhesive layer 2 to the first laminating mechanism, the first laminating mechanism is used to laminarize the first substrate 1, the adhesive layer 2, and the second substrate 3, and the first laminating mechanism, the cooling roller 7, the second laminating mechanism, and the winding roller 9 are arranged in sequence along the conveyor.

[0047] In this embodiment, the melt extrusion mechanism 6 includes a feed hopper 61, a first screw extruder 62, a second screw extruder 63, a third screw extruder 64, and an extrusion die 65. Two partition plates 614 are arranged in the feed hopper 61. The two partition plates 614 divide the feed hopper 61 into a first feed chamber 611, a second feed chamber 612, and a third feed chamber 613. The first feed chamber 611 is connected to the first screw extruder 62, the second feed chamber 612 is connected to the second screw extruder 63, and the third feed chamber 613 is connected to the third screw extruder 64. The first screw extruder 62, the second screw extruder 63, and the third screw extruder 64 are respectively connected to the extrusion die 65, and the extrusion die 65 is used to output the bonding layer 2.

[0048] In this embodiment, a first extrusion channel 651, a second extrusion channel 652, and a third extrusion channel 653 are formed in the extrusion die 65, the first screw extruder 62 is connected to the first extrusion channel 651, the second screw extruder 63 is connected to the second extrusion channel 652, and the third screw extruder 64 is connected to the third extrusion channel 653. A plurality of first extrusion holes 661, a plurality of second extrusion holes 662, and a plurality of third extrusion holes 663 are opened at the end of the extrusion die 65. The plurality of first extrusion holes 661 and the plurality of second extrusion holes 662 are arranged symmetrically, and the plurality of third extrusion holes 663 are arranged between the plurality of first extrusion holes 661 and the plurality of second extrusion holes 662. The plurality of third extrusion holes 663 form a multi-row structure, and the plurality of third extrusion holes 663 in the same row are sequentially arranged from top to bottom. The first extrusion channel 651 is connected to the plurality of first extrusion holes 661, the second extrusion channel 652 is connected to the plurality of second extrusion holes 662, and the third extrusion channel 653 is connected to the plurality of third extrusion holes 663. The plurality of first extrusion holes 661 form a multi-row structure, and the plurality of first extrusion holes 661 in the same row are sequentially arranged at intervals from top to bottom; The plurality of second extrusion holes 662 form a multi-row structure, and the plurality of second extrusion holes 662 in the same row are arranged in sequence from top to bottom.

[0049] This embodiment also includes an extrusion bonding process for a composite material, comprising the following steps: S1. The first unwinding mechanism, i.e., the first unwinding roller 41, unwinds and outputs the first substrate 1 to the first laminating mechanism, the second unwinding mechanism, i.e., the second unwinding roller 42, unwinds and outputs the second substrate 3 to the first laminating mechanism, and the melt extrusion mechanism 6 outputs the adhesive layer 2 to the first laminating mechanism and squeezes the adhesive layer 2 between the first substrate 1 and the second substrate 3 by melting; Specifically, since the material of component A is different from that of component B, a portion of the raw materials of the first bonding layer 21 and a portion of the raw materials of the second bonding layer 23 are stirred and mixed in advance to form the raw materials of the mixed bonding layer 22, and then the raw materials of the other portion of the first bonding layer 21 are conveyed to the first feed chamber 651 through a suction pipe, and the raw materials of the other portion of the second bonding layer 23 are conveyed to the second feed chamber 652 through a suction pipe, and the raw materials of the mixed bonding layer 22 are conveyed to the third feed chamber 653 through a suction pipe, and then conveyed through the first screw extruder 62, the second screw extruder 63, and the third screw extruder 64 respectively, and then the first bonding layer 21 is extruded through a plurality of first extrusion holes 661, the second bonding layer 23 is extruded through a plurality of second extrusion holes 662, and the mixed bonding layer 22 is extruded through a plurality of third extrusion holes 663. The first bonding layer 21, the second bonding layer 23, and the mixed bonding layer 22 are combined to form the bonding layer 2.

[0050] S2. The first lamination mechanism performs the first lamination on the first substrate 1, the adhesive layer 2 and the second substrate 3 to form a composite; specifically, the smooth roller 51 receives the first substrate 1, the pattern roller 52 receives the second substrate 3, and then the adhesive layer 2 is extruded between the first substrate 1 and the second substrate 3 by the melt extrusion mechanism 6 in a melt extrusion manner, so that the first substrate 1 and the second substrate 3 are bonded to form a composite, wherein the bonding method can be continuous, intermittent or spot coating.

[0051] S3. The composite body continues to be conveyed, cooled by the cooling roller 7, and then pressed for the second time by the second pressing mechanism, that is, pressed for the second time by two pressing rollers 8 to form an extruded and bonded composite material, and then guided by multiple guide rollers 91 and wound up by the winding roller 9. Embodiment three:

[0052] The difference between this embodiment and the second embodiment is that the materials of component A and component B are as shown in the attached Figure 1 To Attachment Figure 3 , Attachment Figure 5 As shown, an extrusion-bonded composite material comprises a first substrate 1, an adhesive layer 2, and a second substrate 3, wherein the first substrate 1, the adhesive layer 2, and the second substrate 3 are arranged in sequence from top to bottom.

[0053] In this embodiment, the material of the first substrate 1 is component A, the material of the second substrate 3 is component B, component A is polypropylene, and component B is polyethylene.

[0054] In this embodiment, the first substrate 1 made of the above material is formed into a PP spunmelt nonwoven fabric, and the second substrate 3 made of the above material is formed into a PE spunbond nonwoven fabric.

[0055] In this embodiment, the adhesive layer 2 includes a first adhesive layer 21, a mixed adhesive layer 22, and a second adhesive layer 23. The first adhesive layer 21 is bonded to the first substrate 1, the second adhesive layer 23 is bonded to the second substrate 3, and the mixed adhesive layer 22 respectively bonds the first adhesive layer 21 and the second adhesive layer 23.

[0056] Among them, the first bonding layer 21 and the second bonding layer 23 both include main materials and auxiliary materials. The main material of the first bonding layer 21 is 80 parts of component A, and the auxiliary materials of the first bonding layer 21 are 8 parts of elastomer and 7 parts of cooling masterbatch. The main material of the second bonding layer 23 is 80 parts of component B, and the auxiliary materials of the second bonding layer 23 are 8 parts of elastomer and 8 parts of cooling masterbatch. The extrusion amount of the bonding layer 2 is 4g / m2, and the temperature of the extrusion die 65 is 175°C. The mixed adhesive layer 22 is composed of the raw material of the first adhesive layer 21 and the raw material of the second adhesive layer 23 , and the mass ratio of the raw material of the first adhesive layer 21 to the raw material of the second adhesive layer 23 is 5:5. Embodiment 4:

[0057] The difference between this embodiment and the second embodiment is that the materials of component A and component B are as shown in the attached Figure 1 To Attachment Figure 3 , Attachment Figure 5 As shown, an extrusion-bonded composite material comprises a first substrate 1, an adhesive layer 2, and a second substrate 3, wherein the first substrate 1, the adhesive layer 2, and the second substrate 3 are arranged in sequence from top to bottom.

[0058] In this embodiment, the material of the first substrate 1 is component A, and the material of the second substrate 3 is component B. Component A is polypropylene, and component B is thermoplastic polyester elastomer.

[0059] In this embodiment, the first substrate 1 made of the above material is formed into a PP spunbonded nonwoven fabric, and the second substrate 3 made of the above material is formed into a TPEE cast film.

[0060] In this embodiment, the adhesive layer 2 includes a first adhesive layer 21, a mixed adhesive layer 22, and a second adhesive layer 23. The first adhesive layer 21 is bonded to the first substrate 1, the second adhesive layer 23 is bonded to the second substrate 3, and the mixed adhesive layer 22 respectively bonds the first adhesive layer 21 and the second adhesive layer 23.

[0061] Among them, the first bonding layer 21 and the second bonding layer 23 both include main materials and auxiliary materials. The main material of the first bonding layer 21 is 80 parts of component A, and the auxiliary materials of the first bonding layer 21 are 8 parts of elastomer, 7 parts of cooling masterbatch, and 2 parts of solubilizer. The main material of the second bonding layer 23 is 80 parts of component B, and the auxiliary materials of the second bonding layer 23 are 8 parts of elastomer, 7 parts of cooling masterbatch, and 1 part of solubilizer; the extrusion amount of the bonding layer 2 is 4g / m2, and the temperature of the extrusion die 65 is 180°C; The mixed adhesive layer 22 is composed of the raw material of the first adhesive layer 21 and the raw material of the second adhesive layer 23 , and the mass ratio of the raw material of the first adhesive layer 21 to the raw material of the second adhesive layer 23 is 5:5. Experimental indicators MD peel strength / N CD peeling strength / N Embodiment 1 6.2 4.9 Embodiment 2 7.4 (Break) 6.5 Embodiment 3 5.8 4.5 Embodiment 4 6.3 5.2

[0062] In summary, the peeling strength of the second embodiment is better than that of the first embodiment, the third embodiment and the fourth embodiment, and the second embodiment is the best embodiment.

[0063] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Any technician familiar with the art can use the above disclosed technical content to make more possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, all equivalent and equivalent changes made according to the ideas of the present invention without departing from the content of the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. An extrusion bonding composite material, comprising a first substrate (1), an adhesive layer (2), and a second substrate (3), characterized in that: The first substrate (1), the adhesive layer (2), and the second substrate (3) are arranged in sequence from top to bottom; the adhesive layer (2) comprises a first adhesive layer (21), a mixed adhesive layer (22), and a second adhesive layer (23); the first adhesive layer (21) is bonded to the first substrate (1); the second adhesive layer (23) is bonded to the second substrate (3); and the mixed adhesive layer (22) is bonded to the first adhesive layer (21) and the second adhesive layer (23), respectively.

2. The extrusion-bonded composite material according to claim 1, characterized in that: The material of the first substrate (1) is component A; the material of the second substrate (3) is component B, and the component A and component B are respectively one or more of polypropylene, polyester, polyethylene, polylactic acid, polyurethane, thermoplastic polyester elastomer, and styrene-ethylene / butylene-styrene block copolymer.

3. The extrusion-bonded composite material according to claim 2, characterized in that: The first bonding layer (21) and the second bonding layer (23) both comprise a main material and auxiliary materials, wherein the main material of the first bonding layer (21) is 70-90 parts of component A, and the main material of the second bonding layer (23) is 70-90 parts of component B. The auxiliary materials of the first bonding layer (21) and the second bonding layer (23) are one or more of 3-10 parts of an elastomer, 5-10 parts of a cooling masterbatch, and 1-5 parts of a compatibilizer.

4. The extrusion-bonded composite material according to claim 3, characterized in that: The mixed adhesive layer (22) is composed of a raw material of a first adhesive layer (21) and a raw material of a second adhesive layer (23), and the mass ratio of the raw material of the first adhesive layer (21) to the raw material of the second adhesive layer (23) is 3:7-5:

5.

5. A production equipment for extrusion-bonded composite materials according to claim 4, characterized in that: The invention comprises a first unwinding mechanism, a second unwinding mechanism, a melt extrusion mechanism (6), a first laminating mechanism, a cooling roller (7), a second laminating mechanism, and a winding roller (9), wherein the first unwinding mechanism is used to output a first substrate (1) to the first laminating mechanism, the second unwinding mechanism is used to output a second substrate (3) to the first laminating mechanism, the melt extrusion mechanism (6) is used to output an adhesive layer (2) to the first laminating mechanism, the first laminating mechanism is used to laminarize the first substrate (1), the adhesive layer (2), and the second substrate (3), and the first laminating mechanism, the cooling roller (7), the second laminating mechanism, and the winding roller (9) are arranged in sequence along the conveyor.

6. The production equipment of the extrusion-bonded composite material according to claim 5, characterized in that: The melt extrusion mechanism (6) comprises a feed hopper (61), a first screw extruder (62), a second screw extruder (63), a third screw extruder (64), and an extrusion die (65). Two partition plates (614) are arranged in the feed hopper (61). The two partition plates (614) divide the feed hopper (61) into a first feed chamber (611), a second feed chamber (612), and a third feed chamber (613). The first feed chamber (611) is connected to the first screw extruder (62), the second feed chamber (612) is connected to the second screw extruder (63), and the third feed chamber (613) is connected to the third screw extruder (64). The first screw extruder (62), the second screw extruder (63), and the third screw extruder (64) are respectively connected to the extrusion die (65). The extrusion die (65) is used to output the adhesive layer (2).

7. The production equipment of the extrusion-bonded composite material according to claim 6, characterized in that: The extrusion die (65) has a first extrusion channel (651), a second extrusion channel (652), and a third extrusion channel (653) formed therein; the first screw extruder (62) is connected to the first extrusion channel (651); the second screw extruder (63) is connected to the second extrusion channel (652); and the third screw extruder (64) is connected to the third extrusion channel (653); a plurality of first extrusion holes (661), a plurality of second extrusion holes (662), and a plurality of third extrusion holes (663) are formed at the end of the extrusion die (65); the plurality of first extrusion holes (661) and the plurality of second extrusion holes (662) are arranged symmetrically; the plurality of third extrusion holes (663) are arranged between the plurality of first extrusion holes (661) and the plurality of second extrusion holes (662); the first extrusion channel (651) is connected to the plurality of first extrusion holes (661); the second extrusion channel (652) is connected to the plurality of second extrusion holes (662); and the third extrusion channel (653) is connected to the plurality of third extrusion holes (663).

8. An extrusion bonding process for composite materials as claimed in claim 7, characterized in that: The following steps are involved: S1. The first unwinding mechanism unwinds and outputs the first substrate (1) to the first laminating mechanism, the second unwinding mechanism unwinds and outputs the second substrate (3) to the first laminating mechanism, and the melt extrusion mechanism (6) outputs the adhesive layer (2) to the first laminating mechanism and causes the adhesive layer (2) to be extruded between the first substrate (1) and the second substrate (3) by melting; S2. The first laminating mechanism performs a first lamination on the first substrate (1), the adhesive layer (2), and the second substrate (3) to form a composite; S3. The composite body continues to be transported, cooled by the cooling roller (7), and then pressed for a second time by the second pressing mechanism to form an extruded and bonded composite material, which is then wound up by the winding roller (9).

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