CN112205714A

CN112205714A - Multifunctional acupoint physiotherapy insole and preparation method thereof

Info

Publication number: CN112205714A
Application number: CN202010984081.9A
Authority: CN
Inventors: 王华杰; 王雪粉; 王利勤
Original assignee: Shanghai Aoxiang Shoes Co ltd
Current assignee: Shanghai Nianhe Light Technology Group Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-01-12
Anticipated expiration: 2040-09-18
Also published as: CN112205714B

Abstract

The invention relates to the field of insole materials, in particular to a multifunctional acupoint physiotherapy insole and a preparation method thereof. The insole is sequentially provided with a first net surface, an upper layer of high-elasticity sponge, a hot melt adhesive film, a lower layer of high-elasticity sponge and a second net surface from top to bottom. The multifunctional acupoint physiotherapy insole is of a double-layer structure, the density of the prepared insole can reach 75-110D, and the insole has strong supporting capacity and strong protective effect on soles. And the insole prepared by the invention has the characteristics of ultrahigh rebound resilience, air permeability, moisture absorption, quick drying and the like while having high density. The insole has medical health care performance and excellent physical properties such as resilience, air permeability and the like, and has wide application prospect.

Description

Multifunctional acupoint physiotherapy insole and preparation method thereof

Technical Field

The invention relates to the field of insole materials, in particular to a multifunctional acupoint physiotherapy insole and a preparation method thereof.

Background

Insoles have become an integral part of people's lives as an aid to footwear. The insole can fill the gap between the sole and the shoe bed, so as to prevent the sole from sliding in the shoe, improve the stability of the step, reduce the fatigue of walking and reduce the wound. Meanwhile, the insole also has the functions of sweat absorption and perspiration, the foot inevitably discharges sweat and hot air when walking, and the insole is loose and can absorb the sweat and the hot air, so that the refreshing and comfortable feeling of the foot is kept.

Along with the improvement of living standard of people, people put forward higher and higher requirements on the functionality of wearing articles. The insole has more functions such as an antibacterial insole, a deodorizing insole, a traditional Chinese medicine insole, an antistatic insole, a heightening insole and the like while meeting the comfort.

Polyether sponge and polyester sponge are the most common shoe pad materials in the market at present. Compared with polyester sponge, polyether sponge has the advantages of high strength, hydrolysis resistance, high resilience and good low-temperature performance, but the tensile property, the flexural property, the abrasion resistance and the high-temperature resistance of the polyether sponge are inferior to those of polyester sponge. The reasons for these differences are mainly that the polyether polyol is an alcohol polymer which contains ether bonds on the main chain structure of the molecule and has hydroxyl at the end group, and the material prepared by the polyether polyol has good flexibility because the cohesive energy of the ether bonds in the structure is low and the polyether polyol is easy to rotate; however, compared with polyester sponge, polyether sponge has weak intermolecular polarity, low molecular weight and poor structural regularity, so that the mechanical strength needs to be improved. How to improve the properties of the polyether sponge such as tensile strength, abrasion resistance and the like while keeping the bending resistance and hydrolysis resistance of the polyether sponge is a direction in which the optimization of the polyether sponge process is urgently needed to be improved.

Disclosure of Invention

According to the multifunctional acupoint physiotherapy insole and the preparation method thereof, the insole has medical health care performance and excellent resilience, air permeability and other performances.

The invention provides a multifunctional acupoint physiotherapy insole, which sequentially comprises a first net surface, an upper layer of high-elasticity sponge, a hot melt adhesive film, a lower layer of high-elasticity sponge and a second net surface from top to bottom.

In a preferred embodiment, the upper layer high-elasticity sponge and the lower layer high-elasticity sponge are prepared from the following raw materials in parts by weight: 45-80 parts of polyether polyol, 15-30 parts of isocyanate, 0.5-2 parts of catalyst, 5-10 parts of stabilizer and 5-12 parts of foaming agent.

In a preferred embodiment, the isocyanate comprises at least one of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, lysine diisocyanate.

In a preferred embodiment, the stabilizer comprises an amino silicone oil and/or an epoxy silicone oil.

In a preferred embodiment, the upper and lower high resilience sponges have a density of 75D to 110D.

In a preferred embodiment, the hot melt adhesive film is at least one selected from the group consisting of PA adhesive film, PES adhesive film, PO adhesive film, and TPU adhesive film.

The invention provides a preparation method of a multifunctional acupoint physiotherapy insole in a second aspect, which comprises the following specific steps:

s1, preparing an upper-layer high-elasticity sponge;

s2, preparing a lower-layer high-elasticity sponge;

s3, placing the lower-layer high-elasticity sponge prepared in the step S2 into a mold, adding a hot melt adhesive film on the surface of the lower-layer high-elasticity sponge, then placing the upper-layer high-elasticity sponge prepared in the step S1 into the mold, heating and extruding the upper-layer high-elasticity sponge and the lower-layer high-elasticity sponge through the mold, and bonding the upper-layer high-elasticity sponge and the lower-layer high-elasticity sponge together;

and S4, arranging a first net surface on the upper layer high-elasticity sponge, and arranging a second net surface on the lower layer high-elasticity sponge.

In a preferred embodiment, the heating temperature for heating and extruding the mold is 180-210 ℃.

In a preferred embodiment, the die heats and extrudes at an extrusion pressure of 10-20T for an extrusion time of 60-100 s.

Has the advantages that:

the multifunctional acupoint physiotherapy insole prepared by the invention adopts a double-layer structure, the density of the prepared insole can reach 75D-110D, and the insole has strong supporting capability and strong protective effect on soles. And the insole prepared by the invention has the characteristics of ultrahigh rebound resilience, air permeability, moisture absorption, quick drying and the like while having high density. The insole has medical health care performance and excellent physical properties such as resilience, air permeability and the like, and has wide application prospect.

Drawings

FIG. 1: the obtained insole is shown in front view

FIG. 2: the obtained insole has back pattern

Detailed Description

In order to solve the above problems, the invention provides a multifunctional acupoint physiotherapy insole, which comprises a first net surface, an upper layer of high-elasticity sponge, a hot melt adhesive film, a lower layer of high-elasticity sponge and a second net surface from top to bottom in sequence.

The sole is located at the lowest position of the whole body and is farthest from the heart, the blood flows through the sole at the slowest speed, and acidic metabolites in the blood accumulate and deposit in the body in the day and the month, so that the sole is toxic and can affect the functions of internal organs. The effect of the foot massage on the blood circulation of the human body is equivalent to 'the second heart of the human body'. The toxin can be effectively removed by massaging the acupuncture points, the blood circulation function of the human body is recovered to be normal, and the pathological organs can also obtain sufficient nutrition to rapidly recover the health.

In some preferred embodiments, the upper layer high elastic sponge is embedded with a shock-absorbing gasket. The foot supports the entire weight of the human body, so the bones of the foot are easily worn and injured. The shock-absorbing pad can absorb the impact force of the feet, improve the buffering performance of the insole and further enhance the protection effect of the insole on the feet.

In some preferred embodiments, the upper layer high-elasticity sponge and the lower layer high-elasticity sponge are prepared from the following raw materials in parts by weight: 45-80 parts of polyether polyol, 15-30 parts of isocyanate, 0.5-2 parts of catalyst, 5-10 parts of stabilizer and 5-12 parts of foaming agent.

In some preferred embodiments, the upper and lower high resilience sponges have a density of 75 to 110D.

Preferably, the density of the upper layer high elastic sponge is 75-100D; the density of the lower layer high-elastic sponge is 90-110D.

Preferably, the density of the upper layer high elastic sponge is 80D; the density of the lower layer high-elastic sponge is 100D.

In some preferred embodiments, the polyether polyols include dow 4240 polyether polyol and/or dow 222-056 polyether polyol.

The invention discovers that the high-resilience sponge prepared from the Dow 4240 polyether polyol has stronger resilience. The guessing reason is that the hydroxyl value of the Dow 4240 polyether polyol is 28mgKOH/g, the kinematic viscosity is 410cst (38 ℃), the compatibility with the epoxy silicone oil with the kinematic viscosity of 100-500cst (25 ℃) is stronger, the reaction activity of the polyether polyol under the system is stronger, and the prepared insole has stronger rebound force and high-temperature dimensional stability.

The isocyanate comprises at least one of Toluene Diisocyanate (TDI), isophorone diisocyanate (IPDI), diphenylmethane diisocyanate (MDI), dicyclohexylmethane diisocyanate (HMDI), Hexamethylene Diisocyanate (HDI) and Lysine Diisocyanate (LDI).

Further preferably, the isocyanate is 2, 4-toluene diisocyanate and p-phenylene diisocyanate.

More preferably, the weight ratio of 2, 4-toluene diisocyanate to p-phenylene diisocyanate is 1: (3-5).

The molecular structure of the p-phenylene diisocyanate is symmetrical, higher intermolecular attraction is presented in a molecular chain, and the insole prepared by using the p-phenylene diisocyanate has stronger rebound resilience and flex fatigue resistance; the invention discovers that the weight ratio of the 2, 4-toluene diisocyanate to the p-phenylene diisocyanate is 1: (3-5), the stability of the obtained insole at high temperature is optimal. It is hypothesized that the introduction of the rigid aromatic ring structure further hinders the movement and rotation of the polymer molecular chain, so that higher temperature is needed to make the chain segment move, and further the high-temperature stability of the prepared insole is obviously improved.

In some preferred embodiments, the stabilizing agent comprises an amino silicone oil and/or an epoxy silicone oil.

Further preferably, the stabilizer is epoxy silicone oil.

More preferably, the epoxy silicone oil has a kinematic viscosity of 100-500cst (25 ℃), and the epoxy silicone oil having a kinematic viscosity of 100-500cst (25 ℃) is commercially available, for example, Anhui Egyptian silicone oil, Inc.

The epoxy silicone oil has the dual properties of polysiloxane and epoxy group, and the addition of the silicone oil into the sponge can improve the rebound rate of the prepared insole, enhance the flexibility of the product and improve the crease resistance and the shock resistance of the product. The invention discovers that when the kinematic viscosity of the epoxy silicone oil is 100-500cst (25 ℃), the high temperature resistance of the prepared insole is improved, and meanwhile, the insole is fresh and breathable after being worn, high in elasticity and comfortable, and high in sensory evaluation.

The invention also discovers that after a specific amount of epoxy silicone oil is added, the elongation at break of the prepared insole is obviously increased at high temperature, and the high temperature resistance of the prepared insole is improved. Further preferably, the weight ratio of the epoxy silicone oil to the polyether polyol is 1: (12-15).

In some preferred embodiments, the foaming agent is deionized water.

In some preferred embodiments, the catalyst is triethylenediamine and stannous 2-ethylhexanoate in a weight ratio of 1: 2.

in some preferred embodiments, the hot melt adhesive film is selected from at least one of PA adhesive film, PES adhesive film, PO adhesive film, TPU adhesive film.

s1, preparing an upper-layer high-elasticity sponge;

s2, preparing a lower-layer high-elasticity sponge;

The setting method of S4 may be any method commonly used in the art (e.g., adhesion), and is not particularly limited. For example, the multifunctional acupoint physiotherapy insole is prepared by uniformly coating an adhesive between the first net surface and the upper surface of the upper layer high-elasticity sponge, uniformly coating an adhesive between the second net surface and the lower surface of the lower layer high-elasticity sponge, heating and pressing at 80 ℃ for 100s, and standing at room temperature for 5 h. The adhesive is JL-8261 water-based adhesive sticker which can be commercially available, such as the poly adhesive product Co., Ltd.

In some preferred embodiments, the heating temperature for the mold heating extrusion is 180-210 ℃.

In some preferred embodiments, the die is heated and extruded at an extrusion pressure of 10-20T for an extrusion time of 60-100 s.

The invention discovers that when the upper-layer high-elasticity sponge and the lower-layer high-elasticity sponge are pressed by using a die, the heating temperature is 180-. The mould adopts the mode of high temperature short-time extrusion to effectively promote the brownian motion of hot melt adhesive membrane molecule, helps inside its infiltration upper and lower layer highly elastic sponge surface space, and the diffusion effect that the thermal motion arouses promotes hot melt adhesive membrane and sponge surface molecular chain interweave together, forms firm bonding state to upper and lower layer highly elastic sponge pastes insecure and reduces the problem of comfort level under the violent activity condition such as having avoided running. Meanwhile, the temperature does not damage the molecular structures of the high elastic sponge on the upper layer and the lower layer in a short time, thereby further maintaining the mechanical property of the insole.

In some preferred embodiments, the preparation step of the upper layer high elastic sponge comprises:

adding polyether polyol, a stabilizer, isocyanate, a catalyst and a foaming agent into a reaction kettle according to the formula amount, mixing and foaming at the speed of 500-2000r/min, solidifying to obtain high-elastic sponge, and cutting the formed high-elastic sponge into the shape of an insole.

In some preferred embodiments, the lower layer high resilience sponge is prepared by the same procedure as the upper layer high resilience sponge.

The invention discovers that the density of the insole manufactured by the scheme can reach 75D-110D, and the insole has strong supporting capability and strong protective effect on the sole of a foot. And the insole prepared by the invention has excellent rebound resilience and air permeability while having high density, so that the prepared insole can relieve walking fatigue and is more fresh, breathable and comfortable after being worn.

Examples

Example 1.

A multifunctional acupoint physiotherapy insole comprises a first net surface, an upper layer of high-elasticity sponge, a hot-melt adhesive film, a lower layer of high-elasticity sponge and a second net surface from top to bottom in sequence.

The preparation raw materials of the upper-layer high-elasticity sponge and the lower-layer high-elasticity sponge respectively comprise polyether polyol, isocyanate, a catalyst, a stabilizer and a foaming agent.

The polyether polyol is Dow 4240 polyether polyol, and the Dow 4240 polyether polyol is purchased from Shanghai Xiangkang scientific and technological development limited company.

The isocyanate is 2, 4-toluene diisocyanate and p-phenylene diisocyanate, and the weight ratio of the 2, 4-toluene diisocyanate to the p-phenylene diisocyanate is 1: 3.

the catalyst is triethylene diamine and 2-stannous ethyl hexanoate, and the weight ratio of the triethylene diamine to the 2-stannous ethyl hexanoate is 1: 2.

the stabilizer is epoxy silicone oil, the kinematic viscosity of the epoxy silicone oil is 200cst (25 ℃), and the epoxy silicone oil is purchased from Anhui Eyota silicone oil Co.

The foaming agent is deionized water.

A preparation method of a multifunctional acupoint physiotherapy insole comprises the following specific steps:

s1, preparing an upper-layer high-elasticity sponge;

s2, preparing a lower-layer high-elasticity sponge;

s3, placing the lower-layer high-elasticity sponge prepared in the step S2 into a mold, adding a hot melt adhesive film on the surface of the lower-layer high-elasticity sponge, then placing the upper-layer high-elasticity sponge prepared in the step S1 into the mold, heating and extruding the upper-layer high-elasticity sponge and the lower-layer high-elasticity sponge through the mold, and bonding the upper-layer high-elasticity sponge and the lower-layer high-elasticity sponge together.

S4, uniformly smearing an adhesive between the first net surface and the upper surface of the upper layer high-elasticity sponge, uniformly smearing an adhesive between the second net surface and the lower surface of the lower layer high-elasticity sponge, heating and pressing at 80 ℃ for 100s, and standing at 20 ℃ for 5h to obtain the multifunctional acupuncture point physiotherapy insole.

The adhesive is JL-8261 water-based adhesive sticker which is purchased from the polymer adhesive product Co., Ltd.

The hot melt adhesive film is a PA adhesive film.

The heating temperature of the die for heating and extruding is 200 ℃, the extruding pressure is 12T, and the extruding time is 60 s.

The preparation method of the upper-layer high-elasticity sponge comprises the following steps:

adding 60 parts of polyether polyol, 5 parts of stabilizer, 15 parts of isocyanate, 1 part of catalyst and 10 parts of foaming agent into a reaction kettle, mixing and foaming at the speed of 1500r/min, curing to obtain upper-layer high-elasticity sponge, and cutting the formed high-elasticity sponge into the shape of an insole.

The preparation method of the lower-layer high-elasticity sponge comprises the following steps:

adding 60 parts of polyether polyol, 5 parts of stabilizer, 15 parts of isocyanate, 1 part of catalyst and 8 parts of foaming agent into a reaction kettle, mixing and foaming at the speed of 1500r/min, curing to obtain lower-layer high-elasticity sponge, and cutting the formed high-elasticity sponge into the shape of an insole.

The density of the upper layer high elastic sponge prepared by the method is 80D, and the density of the lower layer high elastic sponge is 100D.

Example 2.

A multifunctional acupoint physiotherapy insole and a preparation method thereof, and the specific implementation mode is the same as that of example 1. The difference is that the polyether polyol is Dow 222-056 polyether polyol, and the Dow 222-056 polyether polyol is purchased from Shanghai Xiangkang scientific development Co.

Example 3.

A multifunctional acupoint physiotherapy insole and a preparation method thereof, and the specific implementation mode is the same as that of example 1. The difference is that the stabilizer is epoxy silicone oil, the epoxy silicone oil with the kinematic viscosity of 400cst (25 ℃) and the kinematic viscosity of 400cst (25 ℃) is purchased from Anhui Aiyuta silicone oil Co.

Comparative example 1.

A multifunctional acupoint physiotherapy insole and a preparation method thereof, and the specific implementation mode is the same as that of example 1. The difference is that the polyether polyol is propylene glycol block polyether which is purchased from Heian petrochemical plant of Jiangsu province and has the CAS number of 9003-11-6.

Comparative example 2.

A multifunctional acupoint physiotherapy insole and a preparation method thereof, and the specific implementation mode is the same as that of example 1. The difference is that the stabilizer is 201 dimethyl silicone oil, and the 201 dimethyl silicone oil is purchased from Shanghai completed mast chemical new materials Co.

Comparative example 3.

A multifunctional acupoint physiotherapy insole and a preparation method thereof, and the specific implementation mode is the same as that of example 1. The difference is that the weight part of the stabilizer is 10 parts.

Comparative example 4.

A multifunctional acupoint physiotherapy insole and a preparation method thereof, and the specific implementation mode is the same as that of example 1. The difference is that the heating temperature of the die for heating and extruding is 150 ℃, and the extruding time is 150 s.

Performance test method

The rebound resilience:

the rebound rate of the prepared insole is determined by reference to the national standard GB/T6670-2008.

Air permeability:

the air permeability of the prepared insole is determined by reference to the national standard GB 5453-1985.

High-temperature stability:

the elongation at break of the insole prepared by the method determined by the national standard GB/T528-1998 at 120 ℃ is defined as excellent when the elongation at break is more than 300 percent, good when 200 to 300 percent and poor when the elongation at break is less than 100 percent.

Sensory evaluation:

the smell, stuffiness and flexibility of the insole obtained by wearing the insole were evaluated comprehensively by a 5-person group through sensory tests. The evaluation scale ranged from 0 (poor performance) to 100 (excellent performance).

Performance test data

TABLE 1 shoe pad Performance test results

Comparing the results of examples 1-3 and comparative examples 1-4, it can be seen that when the Dow 4240 polyether polyol is selected as a preparation raw material and epoxy silicone oil with a kinematic viscosity of 100-. The water absorption rate of the insole prepared by the invention can reach more than 130%, and the insole has good support and heightening performance brought by high density, is fresh and comfortable, and has high sensory evaluation.

Claims

1. The utility model provides a multi-functional acupuncture point physiotherapy shoe-pad which characterized in that, shoe-pad from the top down is first wire side, upper high elasticity sponge, hot melt adhesive film, lower floor high elasticity sponge and second wire side in proper order.

2. The multifunctional acupuncture point physiotherapy insole according to claim 1, wherein the upper layer high-elasticity sponge and the lower layer high-elasticity sponge are prepared from the following raw materials in parts by weight: 45-80 parts of polyether polyol, 15-30 parts of isocyanate, 0.5-2 parts of catalyst, 5-10 parts of stabilizer and 5-12 parts of foaming agent.

3. The multifunctional acupuncture point therapy insole according to claim 2, wherein the isocyanate comprises at least one of toluene diisocyanate, isophorone diisocyanate, diphenylmethane diisocyanate, dicyclohexylmethane diisocyanate, hexamethylene diisocyanate, and lysine diisocyanate.

4. The multifunctional acupoint therapy insole according to claim 2, wherein the stabilizer comprises amino silicone oil and/or epoxy silicone oil.

5. The multifunctional acupuncture point therapy insole according to claim 2, wherein the densities of the upper layer high-elasticity sponge and the lower layer high-elasticity sponge are both 75D-110D.

6. The multifunctional acupoint physiotherapy insole according to claim 1, wherein the hot melt adhesive film is at least one selected from the group consisting of PA adhesive film, PES adhesive film, PO adhesive film, and TPU adhesive film.

7. The method for preparing the multifunctional acupoint physiotherapy insole according to any one of claims 1 to 6, which comprises the following steps:

s1, preparing an upper-layer high-elasticity sponge;

s2, preparing a lower-layer high-elasticity sponge;

8. The method as claimed in claim 7, wherein the mold is heated and pressed at a temperature of 180-210 ℃.

9. The method for preparing a multifunctional acupoint physiotherapy insole according to claim 7, wherein the mold heats and extrudes at an extrusion pressure of 10-20T for 60-100 s.