阅读说明：本技术 一种适应不同足弓高度的鞋垫及二次塑化方法 (Insole suitable for different arch heights and secondary plasticizing method ) 是由 曾理想 王键强 查理 于 2019-05-28 设计创作，主要内容包括：本发明公开了一种适应不同足弓高度的鞋垫,包括复合在一起的面层、主体层和自适应层,鞋垫的厚度大于或等于5mm,自适应层对应于足部的足弓部设置,自适应层的厚度大于或等于2mm,硬度大于50°D,自适应层由TPE材料制成,其软化温度为大于70℃,冷却温度为小于70℃。本发明还公开了一种适应不同足弓高度的鞋垫的二次塑化方法,包括软化TPE材料和二次塑化步骤,与传统技术相比,本发明设置自适应层,通过简单的软化和二次塑化冷定型的简单操作,可根据不同足部的形状和大小,校正鞋垫的形状至与足部完全贴合,增加鞋垫的舒适度,自适应能力强。(The invention discloses an insole suitable for different arch heights, which comprises a surface layer, a main body layer and a self-adaptive layer which are compounded together, wherein the thickness of the insole is more than or equal to 5mm, the self-adaptive layer is arranged corresponding to the arch part of a foot, the thickness of the self-adaptive layer is more than or equal to 2mm, the hardness of the self-adaptive layer is more than 50 degrees D, the self-adaptive layer is made of TPE (thermoplastic elastomer) materials, the softening temperature of the self-adaptive layer is more than 70 ℃, and the cooling temperature of. The invention also discloses a secondary plasticizing method of the insole suitable for different arch heights, which comprises the steps of softening TPE materials and secondary plasticizing.)

1. An insole for accommodating different arch heights, characterized in that: including compound surface course, main part layer and the self-adaptation layer together, the surface course the main part layer with the self-adaptation layer sets gradually, perhaps the self-adaptation layer is inlayed the surface course with between the main part layer, the thickness of shoe-pad is more than or equal to 5mm, the self-adaptation layer sets up corresponding to the arch of foot portion, the thickness of self-adaptation layer is more than or equal to 2mm, and shore hardness is greater than 50D, the self-adaptation layer is made by the TPE material, and its softening temperature is for being greater than 70 ℃, and cooling temperature is for being less than 70 ℃.

2. An insole for accommodating different arch heights according to claim 1, wherein: the TPE material comprises the following raw materials: 5-25 parts of polypropylene PP Y266015-25 parts, 615430-40 parts of SEBS, 5 parts of ethylene propylene diene monomer EPDM, 910710-15 parts of OBC, 10-20 parts of white oil, 5-15 parts of calcium carbonate and 5 parts of antioxidant.

3. An insole for accommodating different arch heights according to claim 1, wherein: the self-adaptive layer is provided with expansion holes convenient for self secondary plasticizing molding, the aperture of each expansion hole is larger than 2mm, and the spacing distance between the expansion holes is 3-5 mm.

4. An insole as claimed in claim 3, adapted for different arch heights: the aperture of the expansion hole is 2mm-4 mm.

5. An insole for accommodating different arch heights according to claim 1, wherein: the thickness of the main body layer is greater than or equal to 2 mm.

6. An insole for accommodating different arch heights according to claim 1, wherein: the main body layer is made of EVA and PU or other functional foam materials except the EVA and the PU, and the Shore hardness of the main body layer is 50-60 degrees D.

7. An insole for accommodating different arch heights according to claim 1, wherein: by taking the shoe pad size US9 as reference, the length of the shoe pad is 273 + -3MM, the height of the arch pit is 13-18MM, the height of the side wall of the shoe pad on the inner arch is 27-32MM, the height of the side wall of the shoe pad on the outer arch is 11-16MM, the width of the metatarsophalangeal toe is 92 + -1 MM, the width of the middle waist is 80 + -1 MM, and the width of the heel is 70 + -1 MM.

8. A method of post-plasticizing insoles to accommodate different arch heights according to claim 2, comprising the steps of:

(1) softening the TPE material: heating medium higher than 70 ℃ is used for acting on the self-adaptive layer of the insole until the TPE material of the insole is softened;

(2) secondary plasticization: and placing the insole made of the softened TPE material in the shoe, then contacting the foot with the insole to enable the insole to be adaptive to the foot, performing cold forming after correcting the shape of the insole, and keeping the shape of the arch position of the insole after the cold forming consistent with the height and the shape of the corresponding arch.

9. The method of claim 8, wherein the two-shot plasticizing process for insoles of different arch heights is: and (3) repeating the step (1) and the step (2) until the insole completely fits the arch after the secondary plasticizing is finished.

Technical Field

The invention belongs to the field of shoemaking, and particularly relates to an insole suitable for different arch heights.

Background

The main function of the human arch is to distribute the gravity from the ankle joint to the metatarsal heads forward through the talus and to the calcaneus backward to ensure the stability of the sole support when standing upright. The muscle elasticity of the arch of the foot plays an important role in cushioning shocks as the body jumps or falls from high to ground. When walking, especially in long-distance trekking, the muscle elasticity of the arch of foot can buffer the rhythm between the gravity transmission of body and the ground bounce, and can keep the blood vessels and nerves on the sole of foot from being pressed.

Influenced by heredity, height, foot muscle, habits and environment, human arch of foot height is different with the shape, the shoes of selling now, use fixed mould and production line to carry out standardized production, shoes after the unified standard can only adapt to the dress of a part crowd, the improper shoes of arch of foot, can appear pain or fatigue of different degrees in the in-process of dress, secondly, the shoes of different brand different grade types, their mould is also different with the standard, it is uncomfortable to cause the style shoes that the consumer liked to appear when choosing shoes, comfortable shoes style is unsatisfied, influence people's quality of life.

In order to meet the market demand as much as possible, insoles with different heights are usually required to be designed, molds with different heights are manufactured and produced, the cost is high, the time is long, and a blind area for taking care still exists; or a 3D scanner is adopted to scan the shape of the foot, and the insole is customized in a personalized way, so that the one-to-one service is realized, and the cost is high. The consumer needs to go to a fixed place for detection, and can take the product only after waiting for a certain production time, so that the product cannot be sold on line.

Disclosure of Invention

In view of the above, the present invention provides an insole with low cost and high adaptability, which is suitable for different arch heights.

In order to achieve the purpose, the technical scheme of the invention is as follows:

the utility model provides an adapt to shoe-pad of different arch of foot height, includes complex surface course, main part layer and the self-adaptation layer together, the surface course main part layer with the self-adaptation layer sets gradually, perhaps the self-adaptation layer is inlayed in the surface course with between the main part layer, the thickness of shoe-pad is more than or equal to 5mm, the self-adaptation layer sets up corresponding to arch of foot portion, the thickness on self-adaptation layer is more than or equal to 2mm, and shore hardness is greater than 50D, the self-adaptation layer is made by the TPE material, and its softening temperature is for being greater than 70 ℃, and cooling temperature is for being less than 70 ℃.

Further, the TPE material comprises the following raw materials: 5-25 parts of polypropylene PP Y266015-25 parts, 615430-40 parts of SEBS, 5 parts of ethylene propylene diene monomer EPDM, 910710-15 parts of OBC, 10-20 parts of white oil, 5-15 parts of calcium carbonate and 5 parts of antioxidant.

Furthermore, the self-adaptive layer is provided with expansion holes, the aperture of each expansion hole is larger than 2mm, and the spacing distance between the expansion holes is 3-5 mm.

Furthermore, the aperture of the expansion hole is 2mm-4 mm.

Further, the thickness of the body layer is greater than or equal to 2 mm.

Further, the main body layer is made of EVA and PU or other functional foam materials except the EVA and the PU, and the Shore hardness of the main body layer is 50-60 degrees D.

Further, with reference to insole size US9, the length of the insole is 273 + -3MM, the height of arch pit is 13-18MM, the height of insole sidewall of inner arch is 27-32MM, the height of insole sidewall of outer arch is 11-16MM, the width of metatarsophalangeal is 92 + -1 MM, the width of middle waist is 80 + -1 MM, and the width of heel is 70 + -1 MM.

After the technical scheme is adopted, the insole suitable for different arch heights has the following beneficial effects: the self-adaptive layer is arranged, the shape of the insole can be corrected to be completely attached to the foot according to the shapes and sizes of different feet, the comfort level of the insole is improved, and the self-adaptive capacity is strong.

A secondary plasticizing method of insoles suitable for different arch heights comprises the following steps:

(1) softening the TPE material: heating medium higher than 70 ℃ is used for acting on the self-adaptive layer of the insole until the TPE material of the insole is softened;

(2) secondary plasticization: and placing the insole made of the softened TPE material in the shoe, then contacting the foot with the insole to enable the insole to be adaptive to the foot, performing cold forming after correcting the shape of the insole, and keeping the shape and the size of the arch position of the insole after the cold forming consistent with the height and the shape of the corresponding arch.

Further, after the secondary plasticizing is finished, repeating the step (1) and the step (2) until the insole completely fits the arch of the foot.

After the technical scheme is adopted, the secondary plasticizing method of the insoles suitable for different arch heights has the following beneficial effects: the shape of the insole can be corrected through simple operations of softening and secondary plasticizing cold setting, so that the shape and size of the arch of the insole are consistent with the height and shape of the corresponding arch of the insole, the comfort degree of the insole is increased, and the self-adaptive capacity is strong.

Drawings

FIG. 1 is a schematic view of an insole of the invention;

wherein, the orientation shown in figure 1 is taken as a reference, and a side view of the insole, a bottom schematic view of the insole, another side view of the insole, a section view of the insole along A-A' in the bottom schematic view and a top schematic view of the insole are sequentially arranged from left to right.

FIG. 2 is a cross-sectional view taken along line B-B' in the bottom view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line C-C' of the bottom view of FIG. 1;

FIG. 4 is a cross-sectional view taken along line D-D' in the bottom view of FIG. 1.

Detailed Description

In order to further explain the technical solution of the present invention, the present invention is explained in detail by the following specific examples.

The invention relates to an insole suitable for different arch heights, which comprises a combination body, as shown in figures 1-4, and the combination body comprises a surface layer (not shown in the figures), a main body layer 01 and an adaptive layer 02, wherein the surface layer, the main body layer 01 and the adaptive layer 02 are sequentially arranged, or the adaptive layer 02 is embedded between the surface layer and the main body layer 01. In this embodiment, with reference to the use state, the surface layer, the main body layer 01, and the adaptive layer 02 are sequentially disposed from top to bottom, the surface layer is located at the topmost layer and contacts with the foot, and the adaptive layer 02 is located at the bottommost layer and contacts with the ground. The main body layer 01 is located between the surface layer and the adaptive layer 02, i.e. the main body layer 01 is an intermediate layer. The thickness of the insole is greater than or equal to 5mm, the adaptive layer 02 is arranged corresponding to the arch part, the thickness of the adaptive layer 02 is greater than or equal to 2mm, 2-3mm is preferable, and the Shore hardness is greater than 50 degrees D. The thickness of the main body layer 01 is more than or equal to 4mm, the main body layer comprises a front palm part, a back heel part and a middle waist part connected between the front palm part and the back heel part, preferably, the thickness of the front palm part is 6mm, and the thickness of the middle waist part and the thickness of the back heel part are respectively 9 mm.

The adaptive layer 02 is made of medical thermoplastic TPE material, and the softening temperature is more than 70 ℃ and the cooling temperature is less than 70 ℃. The self-adaptive layer 02 is provided with expansion holes (not shown in the figure), the diameter of each expansion hole is larger than 2mm, preferably 2mm-4mm, and the spacing distance between the expansion holes is 3-5 mm. The expansion hole facilitates rapid change of the form of the adaptive layer 02 during secondary plasticization, and improves the adaptivity of the adaptive layer. The main body layer 01 is made of EVA, PU or other functional foam materials except EVA and PU, or can be a combination of single material layers made of EVA, PU or other functional foam materials respectively, and the thickness of the single material layers of the combination is not less than 2mm in order to ensure quality. The Shore hardness of the main body layer 01 is 50-60 degrees D. The facing layer is typically made of a woven cloth using natural or synthetic fibers, synthetic leather, natural leather or elastomeric EVA.

As a preferred embodiment, the technical data of the insole are as follows:

the common directions of the feet of the human body are taken as reference, the size US9 of the insole is taken as an example for explanation,

1. length (A-A'): foot length (measured length according to foot actual) + standard length of movable allowance (fixed value range 12-18 MM): 255mm +18mm 273 +/-3 mm;

2. height:

a. arch height (E1-E2): 13-18mm, the probability of forward and backward movement of feet is effectively reduced, the pressure of feet is dispersed, and the comfort level and efficiency of movement are improved; .

b. Insole sidewall height of medial arch (E-E1): 27-32 MM; insole sidewall height of outer arch (F-F1): 11-16MM, and the height difference between E1 and F1 is 7-16 MM.

3. Width: taking the feet stretching and insole inosculating with the feet as the standard to measure

a. Metatarsophalangeal width (B-B'): 92 +/-1 mm;

b. middle waist width (C-C'): 80 plus or minus 1 mm;

c. heel width (D-D'): 70 +/-1 mm;

4. thickness: the half sole heel is more than 5mm and 7 mm.

It should be noted that the terms such as arch socket, inner arch, outer arch and side wall are common terms in the field of shoes, and the designated parts are clear and not explained or defined repeatedly in detail.

As a preferred embodiment, in the walking process, the foot arch will collapse and rebound under the pressure of the weight of the human body and the pulling of the foot arch muscle, and in order to ensure the comfort of the wearer and ensure that the insole will also collapse and rebound along with the foot arch, the elasticity and the distortion (toughness) of the traditional TPE material (the formula is shown in table 1 below) are insufficient, so the inventor adjusts the formula of the traditional TPE material.

TABLE 1 formulation of conventional TPE materials

Formulation components	Component PHR
		Polypropylene PP Y2660	10
SEBS 6154	30
		White oil	30
Calcium carbonate	25
		Antioxidant agent	5

The TPE material comprises the following raw materials: 5-25 parts of polypropylene PP Y266015-25 parts, 615430-40 parts of SEBS, 5 parts of ethylene propylene diene monomer EPDM, 910710-15 parts of OBC, 10-20 parts of white oil, 5-15 parts of calcium carbonate and 5 parts of antioxidant.

TABLE 2 formulation of TPE materials of the invention

Formulation components	A (best)	B (comparison formula)	B (reference formula)
				Polypropylene PP Y2660	20	15	15-25
SEBS 6154	35	40	30-40
				EPDM ethylene propylene diene monomer	5	0	5
OBC 9107	10	10	10-15
				White oil	15	20	10-20
Calcium carbonate	10	10	5-15
				Antioxidant agent	5	5	5

TABLE 3 comparison of physical Properties of TPE materials

Detecting items	Original formula	B (comparison formula)	A (best)
				Hardness (Shao's A)	70A	85A	90A
Density (g/cm)3)	0.98	0.96	0.95
				Tensile Strength (MPA)	9.8	18.4	22.1
Tear Strength (kN/m)	8.7	14.9	19.8

The most outstanding performance of the polypropylene PP Y2660 is the bending fatigue resistance, the fatigue bending resistance of the product can be effectively improved by improving the content of the polypropylene in the formula components, the service life of the product is prolonged, and the hardness and the supporting strength of the product can be increased. The SEBS 6154 is a linear triblock copolymer with an ethylene-butylene copolymer as a middle elastic block, can be used without vulcanization, and has good stability and aging resistance. EPDM is a copolymer of ethylene, propylene and a third monomer, and has good fusion with polypropylene PP and ethylene-butylene polymer SEBS. As can be seen from the above tables 1-3, the addition of EPDM in the formulation can improve the stress resilience of the product, and the molecular chain structure of EPDM approaching saturation can improve the aging resistance and ozone resistance of the product. The Dow Infuse OBC 9107 is an olefin block copolymer, is a semi-crystalline thermoplastic polyolefin elastomer, has obviously reduced shrinkage in a wide temperature range, has good compression permanent deformation resistance, excellent fatigue resistance and good fatigue recovery. The white oil is a mixture of refined liquid hydrocarbons obtained from petroleum, can improve the processing performance of products, and can improve the physical hardness and strength of the products by reducing the use of the white oil compared with the original formula. Calcium carbonate is used as a filling component, so that the product cost can be reduced. The optimal formula reduces the proportion of inorganic salt calcium carbonate, relatively increases the proportion of high molecular compounds of the product, improves the processing performance, simultaneously improves the physical property, and has more beautiful and smooth appearance.

A secondary plasticizing method of insoles suitable for different arch heights comprises the following steps:

(1) softening the TPE material: heating medium higher than 70 ℃ is used for acting on the insole until TPE materials of the insole are softened;

specifically, a, covering the TPE material of the insole with a hot water bag at a temperature of not less than 70 ℃ to a soft degree, and covering the TPE material with boiled water for about 1 minute after the hot water bag is filled with boiled water to soften;

b. heating to soften the TPE by moving a hot air blower to and fro at a height of 20CM against the TPU material for about 2-3 minutes;

c. on the premise of ensuring safety, steam is used to face the TPU material, the TPU material is heated by moving back and forth at a height of 20CM until the TPE is softened, and the time is about 1.5-2 minutes;

d. placing the insole on a container, enabling the TPE material to face upwards, and pouring hot water with the temperature of more than 85 ℃ against the TPU material on the premise of ensuring safety until the TPE is softened for about 10-30 seconds;

(2) secondary plasticization: placing the insole made of the TPE materials after softening in a shoe, then contacting the foot with the insole to enable the insole to be adaptive to the foot, performing cold forming after correcting the shape of the insole, and keeping the shape of the arch position of the insole after the cold forming consistent with the height and the shape of the corresponding arch;

specifically, simultaneously carrying out feet, placing the insoles softened by the TPE into the shoes, then penetrating the feet into the shoes, standing for 2-3 minutes, extruding the insoles by using the weight of the body to carry out cold setting, keeping the shape of the arch of the insoles consistent with the height and the shape of the actual arch of the feet after the cold setting, and effectively supporting the arches of the feet. And (3) repeating the step (1) and/or the step (2) until the insole feels comfortable after being worn, namely the insole can completely fit the arch.

b. Ensuring correct sitting posture, attaching the insole with the softened TPE on one foot, pressing the softened TPE material to be attached to the arch of the foot by a hand, loosening the insole after about 1 minute, and naturally cooling the insole; repeating the action to finish the other foot; if the wearer feels uncomfortable, the step (1) and/or the step (2) can be repeated until the wearer feels comfortable, namely the insole can be completely attached to the arch of the foot.

The above embodiments and drawings are not intended to limit the form and style of the present invention, and any suitable changes or modifications thereof by those skilled in the art should be considered as not departing from the scope of the present invention.