TW201829685A - Hot-melt adhesive film for bonding rubber and EVA foaming materials capable of greatly reducing the manufacturing cost of shoe sole - Google Patents

Abstract

Provided is a hot-melt adhesive film for bonding rubber and EVA foaming materials, which comprises: a hot-melt adhesive film layer including 60 to 90 parts by weight of a polyethylene-ester copolymer, 10 to 40 parts by weight of rubber, 1 to 15 parts by weight of thermoplastic polyolefin, and 5 to 25 parts by weight of auxiliary agent; and a release film layer detachably adhered to the hot-melt adhesive film layer. The hot-melt adhesive film layer is placed on the rubber for hot pressing, and then the ethylene/vinyl acetate copolymer (EVA) foaming material is further hot-pressed with the rubber containing the hot-pressed hot-melt adhesive film, so that the ethylene/vinyl acetate copolymer (EVA) foaming material is bonded to the rubber.

Description

Hot-melt adhesive film for bonding rubber to EVA foam

The invention discloses a hot-melt adhesive film, in particular, a hot-melt adhesive film capable of adhering rubber and an ethylene / vinyl acetate copolymer (EVA) foam material.

Reference is made to "METHOD OF MANUFACTURING FOOTWEAR USING ADHESIVE FILMS AND COMPOSITE OF ADHESIVE FILMS" of US Patent No. 8585548, in which the sole (shoe sole, 700) is manufactured, and the outsole (300) and midsole (500) of the sole The molding method includes the following steps: a first adhesive film (200) and a rubber sheet (100) are embedded in a mold (mold, 10), and the first adhesive film and the rubber plate are hot-pressed to form a large bottom. Next, the outsole with the first adhesive sheet was embedded in a phylon mold (20), and a second adhesive film (400) and foamed EVA (EVA foam, 500a) were placed in this order. And a third adhesive film (600), and hot-pressed it. Therefore, the outsole and the midsole are adhered to the midsole mold through the first adhesive sheet, the second adhesive sheet, and the third adhesive sheet to form the sole.

It can be known that the first adhesive sheet and the second adhesive sheet need to be embedded between the rubber of the sole and the foam-molded EVA for the sole manufactured by the aforementioned patent, which leads to the need to prepare multiple materials and increase the cost. In addition, in the overall manufacturing process of the sole, multiple hot pressing processes are required to adhere the rubber, the first adhesive sheet, the second adhesive sheet, and the third adhesive sheet to the foamed EVA, thereby causing the manufacturing cost of the sole to increase.

In view of the fact that the above-mentioned problems of the prior art cannot be effectively solved and overcome, the applicant filed this patent application to solve the foregoing problems.

The problem to be solved by the present invention is that: the conventional method of manufacturing soles requires the preparation of multiple materials and the need for multiple hot pressing processes to rubber, the first adhesive sheet, the second adhesive sheet, and the third adhesive sheet and foam Molded EVA adhesion causes the manufacturing cost of the sole to rise.

The hot-melt adhesive film for bonding rubber and EVA foaming material of the present invention comprises: a hot-melt adhesive film layer comprising: 60 to 90 parts by weight of a polyethylene-ester copolymer, and 10 to 40 parts by weight of Rubber, 1 to 15 parts by weight of a thermoplastic polyolefin, and 5 to 25 parts by weight of an auxiliary; a release film layer, which is detachably attached to the hot melt adhesive film layer.

When the user needs to adhere the ethylene / vinyl acetate copolymer (EVA) foam material to the rubber, first release the release film layer from the hot melt adhesive film layer, and then place the hot melt adhesive film layer on the rubber hot press Then, the ethylene / vinyl acetate copolymer (EVA) foaming material is hot-pressed with a rubber containing a hot-pressing hot-melt adhesive film to make the ethylene / vinyl acetate copolymer (EVA) foaming material adhere to the rubber. From the above, it can be known that with the hot-melt adhesive film, the user only needs to prepare a piece of the hot-melt adhesive film, an ethylene / vinyl acetate copolymer (EVA) foam material and a rubber material and heat it twice. Bonding to each other by pressing, reducing the materials and manufacturing processes required, and significantly reducing the cost of bonding ethylene / vinyl acetate copolymer (EVA) foam to rubber.

Other objects, advantages, and novel features of the present invention will be more apparent from the following detailed description and the accompanying drawings.

Regarding the technology, means and effects used in the present invention, a preferred embodiment is described in detail below with reference to the drawings. This is for illustration purposes only, and is not limited by such a structure in patent applications.

Refer to Figure 1. The hot-melt adhesive film 1 for bonding rubber and EVA foaming material of the present invention includes a hot-melt adhesive film layer 11 and a release film layer 12 detachably attached to the hot-melt adhesive film layer 11.

The hot-melt adhesive film layer 11 includes 60 to 90 parts by weight of a polyethylene-ester copolymer, 10 to 40 parts by weight of rubber, 1 to 15 parts by weight of a thermoplastic polyolefin, and 5 to 25 parts by weight of an auxiliary agent. Preferably, the polyethylene-ester copolymer is 75 to 85 parts by weight, the rubber is 10 to 30 parts by weight, the thermoplastic polyolefin is 5 to 15 parts by weight, and the auxiliary agent is 10 to 20 parts by weight.

The polyethylene-ester copolymer is one or both of polyethylene-vinyl acetate copolymer, polyethylene-methyl acrylate copolymer, polyethylene-ethyl acrylate copolymer, and polyethylene-butyl acrylate copolymer. More than one blend.

The rubber is one or a combination of natural rubber and synthetic rubber, and the synthetic rubber is: neoprene (CR), styrene-butadiene rubber (SBR), polybutadiene rubber (BR) One of acrylonitrile butadiene rubber (NBR), pentadiene rubber (IR), butyl rubber (IIR), ethylene propylene rubber (EPR), ethylene propylene rubber (EPDM), or a combination thereof .

The thermoplastic polyolefin is one or two of high density polyethylene, linear low density polyethylene, polypropylene homopolymer, polypropylene copolymer and poly (ethylene-propylene), and sequential 1,2-polybutadiene. The above blend.

The additives are: tackifiers, plasticizers, fillers, rubber vulcanization accelerators, rubber activators, softeners, rubber scorch retarders, initiators, crosslinkers, catalysts, antiozonants, antioxidants And one or two or more of additives, the additive is a vulcanizing agent or a silane coupling agent; the tackifier is: rosin ester, polymerized rosin, terpenes, terpenes, styrene terpenes, terpene phenolics One or a combination of resin, petroleum resin and modified petroleum resin; the plasticizer is one or a combination of mineral oil, polybutene, isoprene rubber; the filler is kaolin, mica One of titanium dioxide, titanium dioxide, silicon dioxide, talc, carbon black, or a combination thereof; the rubber vulcanization accelerator is: thiazole-based vulcanization accelerator, sulfenamide, guanidine, dithiocarbamate, sulfur One or a combination of urea-based or thiuram-based vulcanization accelerators; the rubber activator is one or two or more of zinc oxide, magnesium oxide, calcium oxide, and stearic acid; the softening agent is : Mineral oil, liquid paraffin, Asian Kernel oil, coconut oil, paraffin wax, carnauba wax, stearic acid or palmitic acid, or a combination thereof; the rubber scorch retarder is: phthalic anhydride, salicylic acid, benzoic acid, N -One or a combination of nitroso diphenylamine or phthalimidazole sulfenamide; the anti-ozone agent is: one or a combination of microcrystalline wax, paraffin, or natural asphalt extract; The initiator is: an organic peroxide initiator; the crosslinking agent is: a blocked isocyanate; the catalyst is: dibutyltin dilaurate or / and stannous octoate; the antioxidant is: N- (1,3 -Dimethylbutyl) -N'-phenyl-p-phenylenediamine (6PPD), N-N'-diphenyl-p-phenylenediamine (DPPD), octylated diphenylamine (ODPA), 2- One or a combination of thiol benzimidazole (MB), 2,6-di-tert-butyl-4-methylphenol (BHT); the vulcanizing agent is: sulfur or sulfur-bearing agent such as: 4-4 '-Dimorpholine disulfide; the silane coupling agent is: n-octyltriethoxysilane, 3-glycidyletherpropylmethyldiethoxysilane or bis (triethoxy) silane derivative Sodium polysulfide Wherein one or a combination thereof.

In this example, 60 kg of polyethylene-ethyl acetate and 20 kg of natural rubber, 5 kg of thermoplastic polyolefin, 4 kg of tackifier, 0.7 kg of stearic acid, 1.5 kg of microcrystalline wax, 1 kg of zinc oxide, 0.6 kg of sulfur, 0.35 kg of 2,2'-dibenzothiaolyl disulfide (MBTS) and 0.2 kg of Irganox 1010 antioxidant are mixed and used in a kneader Kneading, and then rolling the mixture to obtain an unvulcanized hot-melt adhesive film.

Continued referring to FIG. 2. When the user needs to adhere the ethylene / vinyl acetate copolymer (EVA) foam material A to the rubber B, the release film layer 12 is first separated from the hot melt adhesive film layer 11 and then the hot melt adhesive film layer 11 is disposed. It is hot-pressed on rubber B, and then ethylene / vinyl acetate copolymer (EVA) foam material A is hot-pressed with rubber B containing hot-pressed hot-melt adhesive film 1 to make the ethylene / vinyl acetate copolymer (EVA). The foam material A is bonded to the rubber B.

In summary, the hot-melt adhesive film for bonding the rubber of the present invention to the EVA foamed material has the following advantages:

1. When the user needs to adhere the ethylene / vinyl acetate copolymer (EVA) foam material A to the rubber B, first release the release film layer 12 from the hot melt adhesive film layer 11 and then the hot melt adhesive film layer 11 is placed on rubber B for hot pressing, and then the ethylene / vinyl acetate copolymer (EVA) foam material A is hot pressed with rubber B containing the hot-pressing hot-melt adhesive film 1 to make the ethylene / vinyl acetate copolymer (EVA) ) Foam material A is bonded to rubber B. From the above, it can be known that with the hot-melt adhesive film 1, the user only needs to prepare a piece of the hot-melt adhesive film 1, an ethylene / vinyl acetate copolymer (EVA) foam material A and a rubber B material, and The second hot-pressing process adheres to each other, reducing the materials and manufacturing processes that need to be prepared, and the cost of adhering the ethylene / vinyl acetate copolymer (EVA) foam A and rubber B is significantly reduced.

However, the above are only the preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited by this, the changes in numerical values or the replacement of equivalent elements, or the equivalent according to the scope of the patent application of the present invention Changes and modifications should all fall within the scope of the invention patent.

1‧‧‧Hot Melt Adhesive Film

11‧‧‧Hot Melt Adhesive Film

12‧‧‧ release film

A‧‧‧ethylene / vinyl acetate copolymer (EVA) foaming material

B‧‧‧ rubber

FIG. 1 is a cross-sectional view of a hot-melt adhesive film for bonding a rubber to an EVA foam material according to the present invention. Fig. 2: Schematic diagram of the use of the hot-melt adhesive film for bonding the rubber to the EVA foam material of the present invention.

Claims (7)

A hot-melt adhesive film for bonding rubber to EVA foaming material, comprising: a hot-melt adhesive film layer comprising: 60 to 90 parts by weight of a polyethylene-ester copolymer and 10 to 40 parts by weight of rubber 1 to 15 parts by weight of a thermoplastic polyolefin and 5 to 25 parts by weight of an auxiliary agent; a release film layer, which is detachably attached to the hot melt adhesive film layer. The hot-melt adhesive film for bonding a rubber to an EVA foamed material according to claim 1, wherein the polyethylene-ester copolymer is 75 to 85 parts by weight, the rubber is 10 to 30 parts by weight, and the thermoplastic polymer The olefin is 5 to 15 parts by weight, and the auxiliary agent is 10 to 20 parts by weight. The hot-melt adhesive film for bonding rubber to EVA foaming material according to claim 1, wherein the polyethylene-ester copolymer is: polyethylene-vinyl acetate copolymer, polyethylene-methyl acrylate copolymer One or two or more blends of polyethylene-ethyl acrylate copolymer and polyethylene-butyl acrylate copolymer. The hot-melt adhesive film for bonding rubber to EVA foam material according to claim 1, wherein the rubber is one or a combination of natural rubber and synthetic rubber, and the synthetic rubber is: neoprene (CR), styrene-butadiene rubber (SBR), polybutadiene rubber (BR), acrylonitrile butadiene rubber (NBR), pentadiene rubber (IR), butyl rubber (IIR), two One or two or more blends of ethylene-propylene-diene rubber (EPR) and ethylene-propylene-diene rubber (EPDM). The hot-melt adhesive film for bonding rubber to EVA foamed material according to claim 1, wherein the thermoplastic polyolefin is: high density polyethylene, linear low density polyethylene, polypropylene homopolymer, polypropylene copolymer One or two or more blends of poly (ethylene-propylene), sequential 1,2-polybutadiene. The hot-melt adhesive film for bonding rubber to EVA foaming material according to claim 1, wherein the auxiliary agent is: a tackifier, a plasticizer, a filler, a rubber vulcanization accelerator, a rubber activator, a softener, One or two or more of rubber scorch retarder, initiator, cross-linking agent, catalyst, anti-ozone agent, antioxidant and additive are mixed, and the additive is a vulcanizing agent or a silane coupling agent. The hot-melt adhesive film for bonding rubber to EVA foaming material according to claim 6, wherein: the tackifier is: rosin ester, polymerized rosin, terpenes, terpenes, styrene terpenes, terpenes One or a combination of phenolic resin, petroleum resin, and modified petroleum resin; the plasticizer is one or a combination of mineral oil, polybutene, and isoprene rubber; the filler is: kaolin, One of mica, titanium dioxide, silicon dioxide, talc, carbon black or a combination thereof; the rubber vulcanization accelerator: a thiazole-based vulcanization accelerator, a sulfenamide, a guanidine, a dithiocarbamate, One or a combination of thiourea or thiuram vulcanization accelerators; the rubber activator is: one or two or more of zinc oxide, magnesium oxide, calcium oxide and stearic acid are mixed; the softener It is: one or a combination of mineral oil, liquid paraffin, linseed oil, coconut oil, paraffin wax, carnauba wax, stearic acid, or palmitic acid; the rubber scorch retarder is: phthalic anhydride , Salicylic acid, benzoic acid, N-nitrosodiphenylamine, or One or a combination of phthalimidazole sulfenamides; the anti-ozone agent is: one or a combination of microcrystalline wax, paraffin, or natural asphalt extract; the initiator is: organic Oxide initiator; the crosslinking agent is: blocked isocyanate; the catalyst is: dibutyltin dilaurate or / and stannous octoate; the antioxidant is: N- (1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine (6PPD), N-N'-diphenyl-p-phenylenediamine (DPPD), octylated diphenylamine (ODPA), 2-thiol benzimidazole ( MB), one or a combination of 2,6-di-tert-butyl-4-methylphenol (BHT); the vulcanizing agent: sulfur or a sulfur-bearing agent such as: 4-4'-disulfo disulfoline The silane coupling agent is one of n-octyltriethoxysilane, 3-glycidyletherpropylmethyldiethoxysilane, bis (triethoxy) silane derivative, and sodium polysulfide. One or a combination.