TWI510357B - Composite laminated structure for shoe stiffener and preparing method thereof - Google Patents

Description

Composite layer structure for shoe reinforcement and manufacturing method thereof

The present invention relates to a composite layer structure for a shoe reinforcement and a method of manufacturing the same, and more particularly to a composite layer structure having a fiber fabric as a core.

For the footwear manufacturing industry, shoe reinforcements are often used at the toe or crotch end portions of the footwear, respectively referred to as the toe puff and the heel back. The purpose of using the reinforcement is to provide sufficient support for the upper material to maintain the shape of the footwear, and therefore, the toe puff and the heel back material typically have a degree of tear resistance and resilience. Rigidity is the need to maintain the shape of the upper, and the elasticity is the need to return the original shape when the upper is deformed under any factor.

A large number of different types of reinforcements are used in the footwear industry, including impregnated stiffeners, pre-formed reinforcements, powder coated reinforcements, extruded reinforcements, and the like. Impregnated stiffeners can be made tough, but generally hard grades do not have high resilience, low temperature and long-term operability. Both the impregnated reinforcement, the pre-formed reinforcement and the extruded reinforcement require additional processing steps on the polymer, such as an extruded reinforcement, which is extruded through, for example, an ionic polymer or other thermoplastic polymer. The resin is then extruded and coated on the polymer sheet to produce the desired resilience and tear resistance. This leads to an increase in cost and a large number of manufacturing steps, and the materials used in the shoe reinforcements contain a large amount of plastic materials, and since the waste plastics are difficult to be decomposed in nature (generally plastic materials take 200 to 400 years to completely decompose), Make Into a large amount of permanent garbage.

In view of this, it is necessary to develop new shoe reinforcement materials, provide good tear resistance and resilience, and reduce the use of plastic materials to meet the world trend of environmental protection.

In view of the deficiencies of the prior art, the present invention provides a composite layer structure of a shoe reinforcement, comprising: a fiber fabric core layer; a hot melt adhesive layer covering and flowing into the core layer of the fiber fabric; This allows the composite layered structure to have a tear resistance of greater than 3.0 kg or a resilience of greater than 2.0 kg.

By allowing the hot melt adhesive layer of the present invention to interpenetrate the core layer of the fiber fabric, a permanent interlocking structure is formed between the fibers of the core layer of the fiber fabric, so that the composite layer structure can be excellent. Tear resistance and resilience.

In one embodiment, the tear resistance of the composite layered structure is greater than 10.5 kg.

In another embodiment, the resilience of the composite layer structure is greater than 5.0 kg.

In one embodiment, the core layer of the fiber fabric can have >500 mg. One of the bending stiffness of cm. In a preferred embodiment, the core layer of the fiber fabric may have 500-25000 mg. One of the bending stiffness of cm.

In another embodiment, the bending stiffness of the core layer of the fiber fabric can be tested by the ISO 9073 and GB 18318 standard test methods, but is not limited thereto.

In yet another embodiment, the core layer of the fibrous web has a woven line of 61-13 x 60-30 (per mile) and a weight of 80 g/m ² or more.

In a specific embodiment, the core layer of the fiber fabric may comprise, for example, a hat, a cloth, a quilt line, a 40×40 cloth, an oxford cloth, a lycra, Fabrics such as fine cotton or non-woven fabrics, but are not limited to this.

In one embodiment, the hot melt adhesive layer can be a low temperature hot melt adhesive layer having a softening temperature of less than 90 ° C and a curing time of greater than one minute. In a specific embodiment, the low temperature hot melt adhesive layer may include, for example, a thermoplastic polyurethane (PU) or a polycaprolactone (CAPA), but is not limited thereto.

In one embodiment, the composite layer structure may further comprise at least one adhesive layer to increase the adhesion of the composite layer structure to engage the upper or the inner surface.

In an embodiment, the hot melt adhesive layer may further comprise a filler. And the proportion of the filler in the hot melt adhesive layer is at most 90%. In another embodiment, the proportion of filler to the hot melt adhesive layer can be up to 80%.

In a specific embodiment, the filler may be: an inorganic filler material (for example, inorganic mineral powder, such as calcium carbonate powder, cerium oxide powder, etc.), an organic polymer material (for example, recycled plastic material), or a combination thereof. However, it is not limited to this, and those skilled in the art can arbitrarily select the required filler material according to their needs.

In a specific embodiment, the recycled plastic material may include, for example, polycarbonate (PC), thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), phenol formaldehyde resin, Urea-formaldehyde resin, melamine-formaldehyde resin, epoxy resin, unsaturated polyester resin, polyurethane or a mixture thereof, etc., but are not limited thereto.

The invention also provides a method for manufacturing the composite layered structure, comprising: providing a first-class dynamic first hot-melt material; providing a fiber fabric, the fiber fabric is placed on the first hot-melt adhesive material; Providing a first-class dynamic second hot-melt adhesive material, disposed on the fiber fabric; combining the flow dynamic first hot melt adhesive material, the fiber fabric and the flow dynamic second hot melt adhesive material into the aforementioned composite Layered structure.

The invention further provides the manufacture of the aforementioned composite layer structure The method comprises: providing a first hot melt adhesive material in one of the preheating molds; providing a fiber fabric, placing the fiber fabric on the first hot melt adhesive material; providing a second hot melt adhesive material And placing the first hot melt adhesive material and the second hot melt adhesive material in a mold to form a flow dynamics, and pressurizing and bonding together with the fiber fabric to form the composite layer structure.

In one embodiment, the first hot melt adhesive material and the second hot melt adhesive material may be the same. In another embodiment, the first hot melt adhesive material and the second hot melt adhesive material may also be different materials as the case may be.

In one embodiment, the foregoing manufacturing method may further comprise the step of applying an adhesive layer to the surface of the composite layered structure.

The invention further provides a method for manufacturing the above composite layered structure, comprising: providing a first-class dynamic hot melt adhesive material; providing a fiber fabric, the fiber fabric is placed on the flow dynamic hot melt adhesive material; The dynamic hot melt adhesive material and the fibrous web are bonded together to form the aforementioned composite layered structure.

The invention further provides a method for manufacturing the composite layer structure described above, which comprises: providing a hot melt adhesive material in one of the preheating molds; providing a fiber fabric, and placing the fiber fabric in the hot melt adhesive material The hot melt adhesive material is formed into a flow dynamics in the mold, and is press-bonded together with the fiber fabric to form the aforementioned composite layer structure.

In one embodiment, the foregoing manufacturing method may further comprise the step of applying an adhesive layer on the surface of the composite layer structure.

1‧‧‧Composite layered structure

11‧‧‧First hot melt adhesive layer

12‧‧‧Fiber fabric core layer

13‧‧‧Second hot melt adhesive layer

14‧‧‧Adhesive layer

1a‧‧‧Composite layered structure

11a‧‧‧First hot melt adhesive layer

111a‧‧‧ Periphery

12a‧‧‧Fiber fabric core layer

13a‧‧‧Second hot melt adhesive layer

14a‧‧‧Adhesive layer

The first figure is a cross-sectional view according to Embodiment 1 of the present invention.

The second drawing is a cross-sectional view according to Embodiment 2 of the present invention.

Next, the embodiment of the present invention is described in detail by the following examples, but is not limited thereto. The above and other objects, features and advantages of the present invention will become more apparent from

Example 1

Please refer to the first figure, which is a schematic cross-sectional view of a composite layer structure for a shoe reinforcement according to a first embodiment of the present invention. The composite layer structure 1 includes: a first hot melt adhesive layer 11 and a fiber fabric core. The layer 12 and the second hot melt adhesive layer 13 , wherein the first hot melt adhesive layer 11 and the second hot melt adhesive layer 13 are covered and melted and penetrated into the fiber fabric core layer 11 , wherein the first hot melt adhesive layer 11 and the first The two hot melt adhesive layers 13 are the same material. In other embodiments, the composite layer structure 1 may also include only one layer of hot melt adhesive layer (such as the first hot melt adhesive layer 11 or the second hot melt adhesive layer 13) and the fibrous fabric core layer 12.

The first hot melt adhesive layer 11 and the second hot melt adhesive layer 13 in this embodiment are low temperature hot melt adhesive layers of thermoplastic polyurethane (PU) having a softening temperature lower than 90 ° C and More than one minute of cure time. The hot melt adhesive layer may optionally contain up to 90% or 80% filler, such as inorganic filler materials, organic polymer materials, and the like. Those skilled in the art can choose the required filler material as needed. The organic polymer material in this embodiment is a recycled plastic material, and the type thereof may include polycarbonate (PC), thermoplastic polyurethane (TPU), polyethylene terephthalate (PET), phenol formaldehyde. Resin, urea-formaldehyde resin, melamine-formaldehyde resin, epoxy resin, unsaturated polyester resin, polyurethane or a mixture thereof.

The above-mentioned fiber fabric core layer 12 can be made of a material such as a simple cloth, a hat, a 40*40, an oxford cloth, a lycra, a cotton cloth, a non-woven fabric, or the like. The properties of the fabric core layer are detailed in the next test.

In addition, the composite layer structure 1 of the present embodiment may optionally include two adhesive layers 14 respectively disposed on the surfaces of the first hot melt adhesive layer 11 and the second hot melt adhesive layer 13 to increase the adhesion of the composite layered structure 1. In order to engage them with the upper or the inner.

The aforementioned composite layer structure 1 can be manufactured by extrusion molding, but is not limited thereto, and any suitable plastic molding method can be employed. Taking the co-extrusion as an example, the hot melt adhesive material or the recycled plastic material added as the case may be placed in an extruder, and the hot melt adhesive material is melted into the flow dynamics in the extruder, and then the hot melt adhesive material is The fiber fabric is coextruded to form the aforementioned composite layer structure, and after being cooled and solidified, it is cut according to the final desired shape or size.

Example 2

2 is a schematic cross-sectional view of a composite layer structure for a shoe reinforcement according to a second embodiment of the present invention. The composite layer structure 1a includes: a first hot melt adhesive layer 11a and a fiber fabric core. The layer 12a and the second hot melt adhesive layer 13a, wherein the first hot melt adhesive layer 11a and the second hot melt adhesive layer 13a cover and melt flow into the fiber fabric core layer 11a, wherein the first hot melt adhesive layer 11a and the first The two hot melt adhesive layers 13a are the same material. And the hot melt adhesive layer 11a forms a flattened periphery 111a in the composite layered structure 1a. In addition, the composite layer structure 1a may optionally include two adhesive layers 14a respectively disposed on the first hot melt adhesive layer 11a and the second hot melt adhesive layer 13a to increase the adhesion of the composite laminated structure 1a. Engage with the upper or inner.

The aforementioned composite layer structure 1a can be manufactured by a mold forming method, but is not limited thereto. The mold in the method has a corresponding upper mold and a lower mold (not shown), wherein a part of the hot melt adhesive material is laid in the mold cavity of the lower mold of the preheated mold, and the fabric is placed. On the hot melt adhesive material in the cavity. The remaining portion of the hot melt adhesive material is then laid over the fiber fabric in the cavity and the upper mold is covered, at which time the hot melt adhesive material forms flow dynamics. After flattening with a hand press, the upper mold is removed, and the molded product stored in the cavity is cooled and solidified. take out. This method can design different mold shapes according to the user's needs, can be formed without cutting, and also reduces the waste of materials when cutting into a specific shape, thereby effectively saving production costs.

Test Example 1 - Characteristics of the core layer of the fiber fabric

The fiber fabric core layers 12 and 12a are made of a sample of a simple cloth, a hat cloth 40*40, an oxford cloth, a lycra cloth, a cotton muslin cloth, a non-woven fabric, etc., and the samples are cut into strips of 2 cm×20 cm. Clamped on the fixture on the YG022D automatic fabric stiffness tester (Wenzhou International High Testing Instrument Company), tested by ISO 9073 and GB 18318 standard test method, pushed forward at the speed of the aforementioned machine, through a corner The above machine calculates the folding angle and calculates the bending rigidity (mg.cm). The data can be referred to in Table 1.

Test Example 2 - Characterization test of composite layered structure of shoe reinforcement without recycled plastic

1. Process for composite layer structure of shoe reinforcement without recycled plastic

First, put the mold with one upper mold and the lower mold on the electric heating plate and heat it to 100 °C, and then put some hot melt adhesive TPU powder into the mold cavity of the lower mold evenly, and scrape it back and forth with a scraper to be scraped. After uniformity, the fiber fabric core layer sample which is slightly smaller (ie, minus the 111a circumference) is cut into a suitable position in the cavity, and then The remaining TPU powder is uniformly placed on the core layer of the fiber fabric in the cavity, and then the flattening action is performed. After the release paper is placed on the release paper, the upper mold is covered, and the TPU powder is flow dynamic. Put it on the hand press to carry out the flattening action. After the flattening, remove the upper mold, take off the release paper, and after the mold cavity is cooled down, the finished product can be taken out to obtain the composite layer structure for the shoe reinforcement. .

2. Tear strength test

First, the finished layered structure of the aforementioned shoe reinforcement is cut into a strip of about 2 cm wide and 8 cm long by scissors, and the finished product is cut into a 1.5 cm slit, and fixed on the upper and lower fixed on the universal tensile machine. On the clamp, test (SATRA TM65 certification), the rate is taken as the normal value of 100mm / min, and the maximum value of the tensile machine is the intensity data. See Table 2 below for the test results.

3. Compression rebound test

A 16mm diameter pneumatic cylinder is fixed upright, and a gas pressure regulator is added, and the front end has a 10mm ball head. Another 60mm diameter frame, 47mm diameter, 9.5mm raised upper and lower molds, the composite layered structure of the shoe reinforcement is made into a round product with a diameter of 70mm, and the ball is used after soaking in hot water. Forming a hemisphere, placing it under the pneumatic cylinder, aligning the ball head in front of the pneumatic cylinder with the center of the composite layered hemisphere of the shoe reinforcement, about one centimeter away, and The hemisphere finished product is fixed in position and the test is started.

First reset the gas pressure regulator to zero, then slowly rotate, visually check the value on the gas pressure regulator, and wait for the ball on the finished cylinder to collapse the ball on the finished product, take the maximum value data, and measure its rebound height (height). The shape retention) is back and forth 10 times to observe the data change (pressure ratio is resiliency). See Table 2 below for the test results.

It can be seen from the above table that the composite layered structure to which the core layer of the fiber fabric is added, due to the interpenetrating of the hot melt adhesive layer, forms a permanent interlocking structure between the fibers of the core layer of the fiber fabric. Therefore, it is not necessary to carry out additional treatment on the polymer sheet, and it has good tear resistance and resilience similar to or better than the pure hot melt adhesive, and the manufacturing process is simple, so that the cost of manufacturing the shoe reinforcement can be saved. Moreover, the material of the core layer of the fiber fabric is simple and can be adjusted and replaced according to the needs of the shoe manufacturer to achieve the required tear resistance and resilience. Further, in the preferred embodiment of the present invention, since the shoe reinforcement is formed into a specific shape by a mold, it is not necessary to perform cutting, and waste due to cutting into a specific shape can be reduced.

Test Example 3 - Characterization test of composite layer structure of shoe reinforcement containing recycled plastic

1. Process for composite layer structure of shoe reinforcement containing recycled plastic

The regrind is ground to a particle size of between about 30 and 50 mesh. Then, the hot melt adhesive (the TPU powder in this embodiment) and the recycled plastic powder are separately placed in a plastic bag according to the proportions in Table 3 below, and the plastic bag is filled with air and shaken sufficiently to mix the powder. First, put the mold with an upper mold and the lower mold on the electric heating plate to heat to 100 ° C, and evenly put a part of the TPU and the recycled plastic mixed powder into the mold cavity of the lower mold, and scrape it back and forth with a scraper. After scraping evenly, the fiber fabric core layer sample which is slightly smaller (ie, minus the 111a circumference) is cut into a suitable position in the cavity, and the remaining mixed powder is evenly placed in the cavity of the fiber fabric. On the core layer sample, the flattening action is carried out. After the release paper is placed on the upper mold, the upper mold cover is placed. At this time, the mixed powder material is flow-flowing, and placed on the hand press to perform the flattening action, after being flattened. Remove the upper mold, take off the release paper, and after the mold cavity is cooled down, the finished product can be taken out. Thereafter, the tear strength test and the compression rebound test are performed, and the test method is as described above, and will not be described herein. The test results are shown in Table 3 below.

It can be seen from the above table that the composite layer structure with the core layer of the fiber fabric is more than the composite layer structure containing only the hot melt adhesive material (the core layer without the fiber fabric) containing only the recycled plastic (ie, Table 3 item 7 and 8 sets of data) have significantly better tear resistance and resilience, can achieve environmental protection, and effectively reduce the use of hot melt adhesive plastic materials. Moreover, the test process of the test example is simple, and no additional treatment (for example, adding impregnated non-woven fabric or mixed low-temperature hot melt adhesive) can achieve the required tear resistance and resilience, thereby saving the cost of manufacturing the shoe reinforcement. . Further, in the preferred embodiment of the present invention, since the shoe reinforcement is formed into a specific shape by a mold, it is not necessary to perform cutting, and waste due to cutting into a specific shape can be reduced.

It will be apparent to those skilled in the art that various changes can be made in accordance with the embodiments of the present invention without departing from the spirit of the invention. Therefore, it is to be understood that the invention is not limited by the scope of the invention, and is intended to cover the modifications of the spirit and scope of the invention.

1a‧‧‧Composite layered structure

11a‧‧‧First hot melt adhesive layer

111a‧‧‧ Periphery

12a‧‧‧Fiber fabric core layer

13a‧‧‧Second hot melt adhesive layer

14a‧‧‧Adhesive layer

Claims (23)

A composite layered structure of a shoe reinforcement, comprising: a fiber fabric core layer; a hot melt adhesive layer covering and melt-flowing into the fiber fabric core layer, wherein the hot melt adhesive layer comprises: a thermoplastic polyamine group Thermoplastic polyurethane (PU) or polycaprolactone (CAPA); thereby making the composite layer structure have a tear resistance of greater than 3.0 kg or a resilience of greater than 2.0 kg. The composite layered structure according to claim 1, wherein the composite layered structure has a tear resistance of more than 10.5 kg. The composite layer structure according to claim 1, wherein the composite layer structure has a resilience system of more than 5.0 kg. The composite layer structure according to claim 1, wherein the fiber fabric core layer has >500 mg. One of the bending stiffness of cm. The composite layer structure according to claim 1, wherein the fiber fabric core layer has 500-25000 mg. One of the bending stiffness of cm. The composite layered structure according to claim 4 or 5, wherein the flexural rigidity of the core layer of the fiber fabric is tested by the ISO 9073 and GB 18318 standard test methods. The composite layer structure according to claim 1, wherein the fiber fabric core layer comprises: a hat fabric, a hat latitude and longitude thread 40X40 cloth, an Oxford cloth, a lycra cloth, a cotton yarn fine cloth or a non-woven fabric. The composite layered structure according to claim 1, wherein the fibrous fabric core layer has a woven line of 61-13 x 60-30 (per mile) and a weight of 80 g/m ² or more. The composite layer structure according to claim 1, wherein the hot melt adhesive layer is a low temperature hot melt adhesive layer having a softening temperature of less than 90 ° C and a curing time of more than one minute. The composite layered structure of claim 1, further comprising at least one adhesive layer. The composite layer structure of claim 1, wherein the hot melt adhesive layer further comprises a filler, the filler being at a proportion of the hot melt adhesive layer of at most 90%. The composite layered structure according to claim 11, wherein the proportion of the filler in the hot melt adhesive layer is at most 80%. The composite layer structure according to claim 11, wherein the filler comprises an inorganic filler material, an organic polymer material or a combination thereof. The composite layer structure according to claim 13, wherein the organic polymer material is a recycled plastic material. The composite layered structure according to claim 14, wherein the recycled plastic material comprises: polycarbonate (PC), thermoplastic polyurethane (TPU), polyethylene terephthalate ( PET), phenol formaldehyde resin, urea formaldehyde resin, melamine-formaldehyde resin, epoxy resin, unsaturated polyester resin, polyurethane or a mixture thereof. A method for manufacturing a composite layer structure according to claim 1, comprising: providing a first-class dynamic first hot-melt material; providing a fiber fabric, placing the fiber fabric in the first hot melt of the flow dynamics Providing a first-class dynamic second hot-melt adhesive material on the fiber fabric; and combining the flow dynamic first hot melt adhesive material, the fiber fabric and the flow dynamic second hot melt adhesive material The composite layered structure as described in claim 1 of the patent application. A method for manufacturing a composite layer structure according to claim 1, which comprises: providing a first hot melt adhesive material in one of preheating molds; providing a fiber fabric, placing the fiber fabric Providing a second hot melt adhesive material on the fiber fabric; the first hot melt adhesive material and the second hot melt adhesive material are formed in the mold The flow dynamics and pressurization combined with the fiber fabric are the composite layer structure as described in claim 1 of the patent application. The manufacturing method of claim 16 or 17, wherein the first hot melt adhesive material is the same as the second hot melt adhesive material. The manufacturing method of claim 16 or 17, wherein the first hot melt adhesive material is different from the second hot melt adhesive material. The manufacturing method according to claim 16 or 17, further comprising the step of applying an adhesive layer to the surface of the composite layered structure. A method for manufacturing a composite layer structure according to claim 1, comprising: providing a first-class dynamic hot melt adhesive material; providing a fiber fabric, the fiber fabric being placed on the fluid dynamic hot melt adhesive material; The flow dynamic hot melt adhesive material and the fiber fabric are extruded into a composite layered structure as described in claim 1. A method for manufacturing a composite layer structure according to claim 1, which comprises: providing a hot melt adhesive material in one of preheating molds; providing a fiber fabric, placing the fiber fabric in the heat On the molten material; the hot melt adhesive material is formed into a flow dynamics in the mold, and is press-bonded together with the fibrous fabric to form a composite layered structure as described in claim 1 of the patent application. The manufacturing method according to claim 21 or 22, further comprising the step of coating an adhesive layer on the surface of the composite layered structure.