TWI693995B - Shoemaking method - Google Patents

Abstract

A shoe-making method, including the following steps: (1) providing a plurality of shoe-making particles, the shoe-making particles are obtained by granulating a shoe-making composition, the shoe-making composition includes a mixed component and white Blowing agent, the mixed component contains styrene-ethylene-butene-styrene block copolymer, styrene-butadiene-styrene block copolymer, hydrogenated white oil and phenolic resin; (2) Provide half of the finished product Shoes, the semi-finished shoe includes an insole and an upper with an upper; and (3) using a pull-out injection molding machine to first melt and partially foam the shoe-making particles before being injected into the shoe Continue to foam on the upper to form a sole that fits on the upper. The shoe-making method of the invention has a fast production speed and can save manpower, and at the same time, the proportion of the manufactured shoes is low.

Description

Shoemaking method

The invention relates to a shoe-making method, in particular to a shoe-making method using a pull-out injection molding mechanism shoe.

In order to reduce the specific gravity of shoes, thermoplastic elastomer (TPE) is usually used as the sole material. When the material of the sole is a thermoplastic elastomer, the shoe-making method is generally to first prepare a semi-finished shoe and a sole that do not include the sole, and then attach the sole to the bottom of the semi-finished shoe by viscose. However, since the aforementioned shoe-making method has many manufacturing steps, the production speed is slow and manpower cannot be saved.

If polyvinyl chloride (PVC) is used as the sole material instead of thermoplastic elastomer, although a pull-out injection molding machine and injection molding can be used to form the sole directly on the bottom of the semi-finished shoe (i.e. process steps) less). However, the proportion of shoes made by this shoe-making method is too high and PVC is an environmentally unfriendly material.

Therefore, how to find a shoemaking method that has a fast production speed and can save manpower, and at the same time has a low proportion of the manufactured shoes and is environmentally friendly has become the goal of current research.

Therefore, the object of the present invention is to provide a shoe-making method. The production method of the shoe-making method is fast and can save manpower, and at the same time, the proportion of the produced shoe is low and environmentally friendly.

Therefore, the shoe-making method of the present invention includes the following steps: (1) Providing a plurality of shoe-making particles, the shoe-making particles are obtained by granulating a shoe-making composition, and the shoe-making composition includes a mixture Ingredients and white foaming agent (white foaming agent), the mixed ingredient contains styrene-ethylene-butylene-styrene block copolymer (styrene-ethylene-butylene-styrene block copolymer; SEBS), styrene-butadiene -Styrene-butadiene-styrene block copolymer (SBS), hydrogenated white oil (hydrogenated white oil) and phenolic resin (phenolic resin); (2) Provide half-finished shoes, the semi-finished shoes include an insole And an upper on the insole with an upper on the side opposite to the upper; and (3) using a pull-out injection molding machine to first melt and partially foam the shoe-making particles , And then shot to the upper to continue foaming to form a sole that fits on the upper.

The effect of the present invention is that since the shoe-making particles in the shoe-making method of the present invention are made from a shoe-making composition including specific components, the shoe-making method of the present invention can utilize a pull-out injection molding machine and The forming method directly forms the sole on the upper of the semi-finished shoe. Therefore, the shoe manufacturing method of the present invention has a fast production speed and can save manpower, and at the same time, the proportion of the manufactured shoe is low and environmentally friendly.

The content of the present invention will be described in detail below:

[ step (1)]

The step (1) of the shoe-making method of the present invention is to provide a plurality of shoe-making particles, which are obtained by granulating a shoe-making composition including a mixed component and white hair Foaming agent, the mixed component contains styrene-ethylene-butene-styrene block copolymer, styrene-butadiene-styrene block copolymer, hydrogenated white oil and phenolic resin.

The styrene-ethylene-butene-styrene block copolymer can make the surface of the formed shoe sole smoother and less odorous. Preferably, based on the total weight of the mixed component being 100 wt%, the weight range of the styrene-ethylene-butene-styrene block copolymer is 12-20 wt%. More preferably, the weight range of the styrene-ethylene-butene-styrene block copolymer is 14-18 wt%.

Preferably, the styrene-butadiene-styrene block copolymer contains linear styrene-butadiene-styrene block copolymer and star styrene-butadiene-styrene block copolymer. The linear styrene-butadiene-styrene block copolymer can improve the abrasion resistance of the formed sole. The star-shaped styrene-butadiene-styrene block copolymer can enhance the rebound of the formed sole. More preferably, the weight range of the linear styrene-butadiene-styrene block copolymer is 14-22 wt% based on the total weight of the mixed component being 100 wt%. The star-shaped styrene-butadiene The weight range of the ene-styrene block copolymer is 8-16 wt%. Even more preferably, the weight range of the linear styrene-butadiene-styrene block copolymer is 16-20 wt%, and the weight range of the star-shaped styrene-butadiene-styrene block copolymer is 8~12 wt%.

The hydrogenated white oil refers to the product obtained after the white oil is hydrogenated, and its weather resistance is better than that of the white oil, and it has less odor. Preferably, based on the total weight of the mixed ingredients being 100 wt%, the weight range of the hydrogenated white oil is 24 to 35 wt%. More preferably, the weight range of the hydrogenated white oil is 28-32 wt%.

The phenolic resin can increase the viscosity between the formed sole and the upper. Preferably, based on the total weight of the mixed components being 100 wt%, the weight range of the phenolic resin is 1 to 3 wt%. More preferably, the weight range of the phenolic resin is 1.5-2.5 wt%.

The main component of the white foaming agent [also known as metanamide-free foaming agent] is sodium bicarbonate, which does not produce methamamide after its decomposition, so it is more environmentally friendly. Preferably, based on the total weight of the mixed ingredients being 100 wt%, the weight range of the white foaming agent is 2 to 4 wt%. More preferably, the weight range of the white foaming agent is 3-4 wt%.

Preferably, the shoe-making composition of the present invention further includes additives selected from styrene, antioxidants, fillers, slip agents or combinations of the foregoing.

More preferably, based on the total weight of the mixed component being 100 wt%, the weight range of the styrene is 8-16 wt%. More preferably, the weight range of the styrene is 8-12 wt%.

The antioxidant is, for example but not limited to, 4-methyl-phenol, and the reaction product of dicyclopentadiene and isobutylene (4-methyl-phenol, reaction products with dicyclopentadiene and isobutylene). More preferably, based on the total weight of the mixed ingredients being 100 wt%, the weight range of the antioxidant is 1.5-4 wt%. Even more preferably, the weight range of the antioxidant is 1.5-3 wt%.

The filler is, for example but not limited to, calcium carbonate, silica or a combination of the foregoing. More preferably, based on the total weight of the mixed component being 100 wt%, the weight range of the filler is 8-12 wt%. Even more preferably, the weight range of the filler is 9-11 wt%.

More preferably, the slip agent contains an internal slip agent and an external slip agent. The internal slip agent is, for example but not limited to, ethylene-bis-stearamide. The external slip agent is, for example but not limited to, polyethylene wax. Even more preferably, based on the total weight of the mixed ingredients being 100 wt%, the weight range of the slip agent is 1 to 3 wt%. Even more preferably, the weight range of the slip agent is 1.5-2.5 wt%.

[ step (3)]

The step (3) is to melt and partially foam the shoe-making particles by using a pull-out injection molding machine, and then inject the foam onto the upper to continue foaming, so as to form a sole attached to the upper.

Preferably, the pull-top injection molding machine includes an injection device including: a hopper; a nozzle spaced from the hopper; and a feeding channel connecting the hopper and the nozzle, wherein The shoe particles first enter the conveying channel from the hopper, melt and partially foam in the conveying channel, and then transported to the nozzle for injection.

Preferably, the temperature range in the feed channel is 167~193°C. More preferably, the temperature in the feed channel is sequentially divided into a first temperature, a second temperature and a third temperature from the hopper to the nozzle, the first temperature ranges from 167 to 173°C, and the second temperature The range is 177~183°C, and the third temperature range is 187~193°C.

The present invention will be further described with respect to the following embodiments, but it should be understood that this embodiment is merely an illustration and should not be interpreted as a limitation of the implementation of the present invention.

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same number.

＜ Examples ＞

An embodiment of the shoe-making method of the present invention includes the following steps: Step (1) -providing shoe-making granules: a shoe-making composition is extruded and granulated using an extruding granulator to obtain a plurality of shoe-making granules. The names and contents of the components in the shoe-making composition are summarized in Table 1 below. Table 1 name Content (wt%) Mixed ingredients SEBS 15 Linear SBS 17 Star SBS 9 Hydrogenated white oil 30 Phenolic Resin 2 PS 10 Antioxidants 2 Filler 10 Slip agent 2 White foaming agent 3 * Antioxidant : Contains 4-methyl-phenol, and the reaction product of dicyclopentadiene and isobutylene * Filler: Calcium carbonate * Slip agent : Contains vinyl distearate (internal slip agent) and polyethylene Wax (external slip agent) Step (2) -Provide semi-finished shoes: Provide half-finished shoes. Referring to FIG. 1, the semi-finished shoe 11 includes an insole 111 and an upper 112 on the insole 111. The insole 111 has an upper 1111 on a side opposite to the upper 112. The material of the upper 1111 is, for example but not limited to, canvas, wetsuit cloth, flying woven cloth, polyolefin elastomer (POE) leather, and the like. Step (3) -preparing the sole: using a pull-out injection molding machine, the shoe-making particles are melted and partially foamed, and then injected onto the upper 1111 of the semi-finished shoe 11 to continue foaming. When completely foamed, after cooling, a sole 12 is formed that fits on the upper 1111 (see FIG. 2). The semi-finished shoe 11 and the sole 12 form a shoe 1.

Referring to FIG. 3, the pull-top injection molding machine used in this embodiment includes an injection device 3, and the injection device 3 includes a hopper 31, a nozzle 32 and a feeding channel 33.

The hopper 31 is spaced from the nozzle 32. The feeding channel 33 communicates the hopper 31 and the nozzle 32. Wherein, the shoe-making particles first enter the conveying channel 33 from the hopper 31 and melt and partially foam in the conveying channel 33, and then, the molten shoe-making particles are made by spiral pressure This nozzle 32 is conveyed and ejected. It should be noted that, in this embodiment, the pressure of the conveying channel 33 to be screw-pressed is about 30-50 kg/cm ² , and the temperature of the conveying channel 33 from the hopper 31 to the nozzle 32 depends on The sequence is divided into a first temperature, a second temperature and a third temperature. The first temperature is 170°C, the second temperature is 180°C, and the third temperature is 190°C.

The pull-top injection molding machine used in this embodiment further includes at least one shoe last (not shown) for fixing the semi-finished shoe. The semi-finished shoe 11 is fixed by fitting the upper 112 onto one of the shoe lasts, so that the injection device 3 can subsequently eject the molten shoe-making particles onto the upper 1111.

It is particularly worth mentioning that the shoe made in this embodiment has a low specific gravity (0.5~0.78), and because no additional glue is needed, the shoe-making method in this embodiment can save manpower and produce faster [the aforementioned steps (3) It takes only 9 to 15 seconds and 8 hours to produce about 960 to 1600 pairs of shoes].

In addition, if the step (3) fails to prepare the sole, the secondary material left after being ejected and cooled can be mixed with the shoe-making particles obtained in the step (1) (the weight of the secondary material and the shoe-making particles) The ratio is 1:6) to obtain a mixture. The mixture can be subjected to the melting, foaming and injection steps in step (3) again, that is, the raw materials used in the present invention can be reused without waste.

In summary, since the shoe-making particles in the shoe-making method of the present invention are made of a shoe-making composition including specific components, the shoe-making method of the present invention can utilize a pull-out injection molding machine and injection molding The sole is formed directly on the upper of the semi-finished shoe. Therefore, the shoe-making method of the present invention has a fast production speed and can save manpower, and at the same time, the manufactured shoes have a low specific gravity and are environmentally friendly, so the purpose of the invention can indeed be achieved.

However, the above are only examples of the present invention, and the scope of implementation of the present invention cannot be limited by this, any simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the patent specification are still classified as Within the scope of the invention patent.

1: shoes

11: Semi-finished shoes

111: insole

1111: Upper

112: upper

12: sole

3: injection device

31: Hopper

32: Nozzle

33: feeding channel

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: 　 FIG. 1 is a perspective schematic diagram illustrating half-finished shoes in the shoe manufacturing method of the present invention; 　 FIG. 2 is a schematic perspective diagram, A shoe in the shoe-making method of the present invention is illustrated; and FIG. 3 is a schematic side view illustrating an injection device of a pull-out injection molding machine in the shoe-making method of the present invention.

1: shoes

11: Semi-finished shoes

111: insole

1111: Upper

112: upper

12: sole

Claims (9)

A shoe-making method, including the following steps: (1) providing a plurality of shoe-making particles, the shoe-making particles are obtained by granulating a shoe-making composition, the shoe-making composition includes a mixed component and white Blowing agent, the mixed component contains styrene-ethylene-butene-styrene block copolymer, styrene-butadiene-styrene block copolymer, hydrogenated white oil and phenolic resin; (2) provide half-finished products Shoes, the semi-finished shoe includes an insole and an upper on the insole, the insole has an upper on a side opposite to the upper; and (3) using a pull-out injection molding machine to first make the After the shoe-making particles are melted and partially foamed, and then injected onto the upper to continue foaming, to form a sole attached to the upper, wherein the pull-top injection molding machine includes an injection device, the injection device It includes a hopper, a nozzle spaced from the hopper, and a feed channel connecting the hopper and the nozzle. The shoe-making particles first enter the feed channel from the hopper and melt in the feed channel And part of the foam, and then sent to the nozzle for injection. The shoe-making method according to claim 1, wherein the styrene-butadiene-styrene block copolymer contains linear styrene-butadiene-styrene block copolymer and star styrene-butadiene -Styrene block copolymer. The shoe-making method according to claim 2, wherein the weight range of the linear styrene-butadiene-styrene block copolymer is 14 to 22 wt% based on the total weight of the mixed component being 100 wt%. The star styrene-butadiene-styrene block copolymer has a weight range of 8-16 wt%. The shoe manufacturing method according to claim 1, wherein the weight range of the styrene-ethylene-butylene-styrene block copolymer is 12-20 wt% based on the total weight of the mixed component being 100 wt%. The shoemaking method according to claim 1, wherein the weight range of the hydrogenated white oil is 24 to 35% by weight based on the total weight of the mixed ingredients being 100% by weight. The shoe-making method according to claim 1, wherein the weight range of the phenolic resin is 1 to 3 wt% based on the total weight of the mixed component being 100 wt%. The shoemaking method according to claim 1, wherein the weight range of the white foaming agent is 2 to 4 wt% based on the total weight of the mixed component being 100 wt%. The shoe-making method according to claim 1, wherein the shoe-making composition further includes an additive selected from styrene, antioxidants, fillers, slip agents, or a combination of the foregoing. The shoe-making method according to claim 1, wherein the temperature in the feed channel is sequentially divided into a first temperature, a second temperature and a third temperature from the hopper to the nozzle, and the range of the first temperature is 167 ~173°C, the second temperature range is 177~183°C, and the third temperature range is 187~193°C.

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