ETPU saddle having integrally formed leather texture, and production process therefor

Abstract

Disclosed in the present invention are an ETPU saddle having an integrally formed leather texture, and a production process therefor. The ETPU saddle comprises a saddle main body, the saddle main body having an upper saddle body and a lower saddle body; the lower saddle body is a TPU saddle, the hardness of the TPU saddle being 60-90 A; the upper saddle body is an ETPU saddle, the hardness of the ETPU saddle being 30-50 A; the upper surface of the upper saddle body is a leather texture surface integrally formed with the upper saddle body. Compared with the prior art, the present invention enables the saddle to be recycled as a whole as the materials ETPU and TPU are not much different, thereby improving the post-use recycling rate of the saddle.

Description

ETPU saddle with integrally formed skin lines and production process thereof TECHNICAL FIELD

[0001] The present application relates to the technical field of bicycle seat cushions, and in particular to an ETPU saddle with integrally formed skin lines and a production process thereof. BACKGROUND

[0002] A bicycle saddle is a component for a person to ride on a bicycle, and a traditional bicycle saddle includes a sponge pad and a waterproof layer wrapped outside the sponge pad. With the popularity of shared bicycles, a large number of bicycles are placed on the roadside and are exposed to sunlight and rain, so that cracks are generated on the surface of the saddle, and water stains enter the sponge pad from the cracks. Even if the surface is wiped clean, the sponge pad in the saddle can still accumulate water, which can easily wet the trousers when used, and the use is inconvenient. To solve the above technical problems, an ETPU particle foaming polymerization saddle appears, such as a saddle and a production process thereof with the application number 201811372143X, which includes a saddle body and a waterproof film arranged outside the saddle body, and the saddle body is formed by ETPU particle foaming polymerization; the ETPU particle includes the following components: toluene diisocyanate 30-40wt%, polyester amide 15-20wt%, hydrolysis-resistant agent 20-30wt%, foaming agent 1-5wt%, crosslinking agent 5-10wt%, antibacterial agent 0.1-1wt%, and auxiliary agent 10-20wt%; the hydrolysis-resistant agent is adipic acid and terephthalic acid; the auxiliary agent includes abrasive and dye; the abrasive is titanium white and calcium carbonate; the waterproof film includes any one of PU film, PET film, PE film, and PVC film; the ETPU particle includes the following preparation steps: toluene diisocyanate, polyester amide, adipic acid, terephthalic acid, foaming agent, crosslinking agent, antibacterial agent, titanium white, calcium carbonate, and dye are weighed according to the set proportion; and toluene diisocyanate, polyester amide, adipic acid, terephthalic acid, foaming agent, crosslinking agent, antibacterial agent, titanium white, calcium carbonate, and dye after weighing are mixed uniformly, foaming polymerization is carried out under the environment of 150-170℃ and 140-160MPa, extrusion, granulation, and ETPU particles are obtained. The saddle body formed by ETPU particle foaming polymerization, rainwater cannot penetrate into the saddle body, and the surface of the saddle can be quickly dried after wiping the surface.

[0003] However, the above saddle is to hot-press PU artificial leather as a waterproof film on the surface of the saddle body, so that the PU artificial leather and the ETPU particles are integrally formed. When the saddle needs to be recycled after long-term use, the part of the PU artificial leather and the ETPU particles integrally formed cannot be recycled due to the difference in materials, so that the saddle can only be partially recycled, resulting in low recycling rate of the saddle. There are also PU artificial leather glued on the surface of the saddle body, but this is easy to have obvious glue lines or easy to delaminate, and the part of the saddle body glued still cannot be recycled, also having the problem of low recycling rate of the saddle. TECHNICAL PROBLEM

[0004] The existing saddle is to hot-press PU artificial leather as a waterproof film on the surface of the saddle body, so that the PU artificial leather and the ETPU particles are integrally formed. When the saddle needs to be recycled after long-term use, the part of the PU artificial leather and the ETPU particles integrally formed cannot be recycled due to the difference in materials, so that the saddle can only be partially recycled, resulting in low recycling rate of the saddle. There are also PU artificial leather glued on the surface of the saddle body, but this is easy to have obvious glue lines or easy to delaminate, and the part of the saddle body glued still cannot be recycled, also having the problem of low recycling rate of the saddle. TECHNICAL SOLUTION

[0005] In order to achieve the purpose, the application adopts the following technical scheme:

[0006] An ETPU saddle integrally formed with skin patterns and a production process thereof, comprising a saddle body, the saddle body having an upper saddle body and a lower saddle body, the lower saddle body being a TPU saddle, the hardness of the TPU saddle being 60-90A; the upper saddle body being an ETPU saddle, the hardness of the ETPU saddle being 30-50A; the upper surface of the upper saddle body being a skin texture surface integrally formed with the upper saddle body.

[0007] The upper saddle body and the lower saddle body are integrally formed.

[0008] The hardness of the lower saddle body is 75A.

[0009] The hardness of the upper saddle body is 35A.

[0010] A production process of an ETPU saddle integrally formed with skin patterns, comprising the following steps:

[0011] Step one, TPU saddle forming, using an injection molding machine to integrally form a TPU saddle with an outer contour matching the outer contour of the saddle, the hardness of the TPU saddle being 60-90A;

[0012] Step two, ETPU saddle forming, adopt the way of steam forming to integrally form the ETPU saddle which is consistent with the TPU saddle of step one, the hardness of the ETPU saddle is 30-50A;

[0013] Step three, integrally hot-press forming, first, place the TPU saddle of step one in the forming cavity of the TPU forming machine, then, stack the ETPU saddle of step two on the TPU saddle in the forming cavity, and the side of the forming cavity facing the ETPU saddle is a textured forming surface with uneven texture, the texture of the textured forming surface is skin texture, finally, the TPU forming machine is closed to form, the molding temperature is 90°-120°, and after molding, the ETPU saddle with skin on one side is obtained. Advantages

[0014] The ETPU saddle integrally formed with skin of the application has the following advantages: the upper layer of the ETPU saddle is ETPU particles, the ETPU particles have a certain waterproof property, the pores of the ETPU particles are closed, so rainwater cannot seep through the pores, thereby improving the waterproof performance of the surface of the saddle, and the ETPU material has better rebound and buffering performance, thereby improving the shockproof performance of the saddle and the comfort of the user when riding a bicycle; in addition, the upper surface of the upper saddle body is a skin texture surface, so the appearance of the saddle is more beautiful, and there is no need to attach a waterproof film to the surface of the saddle, the skin texture surface is uneven, so when the user sits on the saddle, the surface of the saddle is better ventilated; at the same time, the lower layer of the saddle is TPU material, on the one hand, the bearing capacity of the TPU material is higher, and the TPU material can better play a supporting and protecting role, on the other hand, ETPU is a product processed from TPU, and the structures of ETPU and TPU are similar, so the overall recycling of the saddle in the later stage is facilitated; compared with the prior art, the saddle is integrally formed from ETPU and TPU, and the materials of ETPU and TPU are not very different, so the saddle as a whole can be recycled, thereby improving the recycling rate of the saddle in the later stage; in addition, the surface of the saddle is the skin texture formed after the ETPU particles are foamed, the appearance of the saddle is beautiful, the waterproof performance of the saddle is better, and there is no need to attach a waterproof film to the saddle to achieve the waterproof effect; in addition, the hardness of the lower layer is higher, and the hardness of the upper layer is smaller, so the lower layer better plays a supporting role, and the upper layer better plays a comfortable role. Best mode of the application

[0015] The application discloses an integrally-formed skin-textured ETPU saddle and a production process thereof, and the ETPU saddle comprises a saddle body, wherein the saddle body comprises an upper saddle body and a lower saddle body, the lower saddle body is a TPU saddle, the hardness of the TPU saddle is 60-90A, preferably, the hardness of the lower saddle body is 75A, the upper saddle body is an ETPU saddle, the hardness of the ETPU saddle is 30-50A, preferably, the hardness of the upper saddle body is 35A, the upper surface of the upper saddle body is a skin-textured surface which is integrally formed with the upper saddle body, and the upper saddle body and the lower saddle body are integrally formed.

[0016] The upper layer of the integrally-formed skin-textured ETPU saddle is ETPU particles, the ETPU particles have a certain waterproof property, the pores of the ETPU particles are closed, rainwater cannot seep through the pores, and therefore the waterproof performance of the surface of the saddle is improved, the ETPU material has better rebound and buffering performance, the shockproof performance of the saddle is improved, and the comfort of a user when riding a bicycle is improved; in addition, the upper surface of the upper saddle body is a skin-textured surface, the appearance of the saddle is more beautiful, a waterproof film does not need to be attached to the surface of the saddle, the skin-textured surface is uneven, when a user sits on the saddle, the user is not completely attached to the surface of the saddle, and the surface of the saddle is better ventilated; meanwhile, the lower layer is TPU material, on one hand, the bearing capacity of the TPU material is higher, and the TPU material can better play a supporting and protecting role, and on the other hand, ETPU is a product processed from TPU, the structure of the ETPU is similar to that of the TPU, and the ETPU is convenient for overall recycling of the saddle in the later period; compared with the prior art, the saddle is integrally formed by ETPU and TPU, the material difference between the ETPU and the TPU is small, the whole saddle can be recycled together, the recycling rate of the saddle in the later period is improved, the surface of the saddle is the skin texture formed after ETPU particles are foamed, the appearance is beautiful, the waterproof performance is better, the hardness of the lower layer is higher, and the hardness of the upper layer is smaller, so that the lower layer better plays a supporting role, and the upper layer better plays a comfortable role.

[0017] The application discloses an integrally-formed skin-textured ETPU saddle and a production process thereof, and the ETPU saddle comprises a saddle body, wherein the saddle body comprises an upper saddle body and a lower saddle body, the lower saddle body is a TPU saddle, the hardness of the TPU saddle is 60-90A, preferably, the hardness of the lower saddle body is 75A, the upper saddle body is an ETPU saddle, the hardness of the ETPU saddle is 30-50A, preferably, the hardness of the upper saddle body is 35A, the upper surface of the upper saddle body is a skin-textured surface which is integrally formed with the upper saddle body, and the upper saddle body and the lower saddle body are integrally formed.

[0018] Step one, TPU saddle forming, a TPU saddle which is matched with the contour of the saddle in shape is integrally formed by using an injection molding machine, the hardness of the TPU saddle is 60-90A, the process that the TPU saddle with the hardness of 60-90A is injected by the injection molding machine is a known technology for those skilled in the art, and no more description is made herein.

[0019] Step two, ETPU saddle forming, adopt steam forming to form ETPU saddle which is consistent with TPU saddle of step one, the hardness of ETPU saddle is 30-50A, the process of steam heating to form ETPU saddle with hardness of 30-50A is well known to those skilled in the art, and will not be described here; ETPU foam body is obtained by first foaming with steam.

[0020] Step three, integral hot forming, first, place TPU saddle of step one in the forming cavity of TPU forming machine, then, stack ETPU saddle of step two on the TPU saddle in the forming cavity, and the side of the forming cavity facing the ETPU saddle (i.e. the top surface of the ETPU saddle) is a textured forming surface with uneven texture, the texture of the textured forming surface is a skin texture, finally, the TPU forming machine is closed to form, the mold pressing temperature during forming is 90°-120°, and the ETPU saddle with skin on one side is obtained after cooling and demolding; the forming method of TPU forming machine for forming TPU saddle and ETPU saddle together is similar to the existing TPU forming method, which is well known to those skilled in the art, and will not be described here; during the forming process, ETPU is foamed twice by hot pressing, and TPU is also foamed, the bottom surface of the ETPU saddle and the top surface of the TPU saddle are integrally formed during foaming, and ETPU fills the chamber of the forming cavity, so that the top surface of the TPU saddle is the same as the textured forming surface with uneven texture, and the surface of the TPU saddle will form a smooth and textured skin, without the need to attach a waterproof film on the surface of the saddle, making the appearance of the entire saddle more beautiful, and when the user sits on the saddle, the skin texture makes the surface of the saddle not completely adhere to the surface of the saddle, and the surface of the saddle is more breathable.

[0021] The production process of the ETPU saddle with skin integrally formed according to the application, the lower layer of the saddle is formed by injection molding to form a TPU saddle, the upper layer of the saddle is formed by steam heating to form an ETPU saddle, and the upper layer and the lower layer are integrally formed by hot pressing, the production process is simple, easy to operate and easy to implement; compared with the prior art, the saddle processed by the above production process is integrally formed by ETPU and TPU, the upper layer of ETPU saddle and the lower layer of TPU saddle can be recycled together, thereby improving the recycling rate of the entire saddle in the later period; and the saddle has waterproof performance without the need to attach a waterproof film on the surface of the saddle.

Claims

1. An integrally molded skin textured ETPU saddle comprising a saddle body, characterized by: The saddle body has an upper saddle body and a lower saddle body, the lower saddle body is a TPU saddle, the hardness of the TPU saddle is 60-90A; the upper saddle body is an ETPU saddle, the hardness of the ETPU saddle is 30-50A; the upper surface of the upper saddle body is a skin texture surface which is integrally formed with the upper saddle body.

2. The process for producing a one-piece ETPU saddle with a skin according to claim 1, characterized in that: The upper saddle body and the lower saddle body are integrally formed.

3. The process for producing a one-piece ETPU saddle with integral skin of claim 1, wherein: The hardness of the lower saddle body is 75A.

4. The process for producing a one-piece ETPU saddle with integral skin of claim 1, wherein: The hardness of the upper saddle body is 35A.

5. A process for producing an integrally molded skinned ETPU saddle, characterized by: The method comprises the following steps: Step one, TPU saddle forming, an injection molding machine is used to integrally form a TPU saddle which has an outline profile matching the outline profile of the saddle, the hardness of the TPU saddle is 60-90A; Step two, ETPU saddle forming, a steam forming method is used to integrally form an ETPU saddle which matches the TPU saddle of step one, the hardness of the ETPU saddle is 30-50A; Step three, integrally hot-press forming, first, the TPU saddle of step one is placed in a forming cavity of a TPU forming machine, then the ETPU saddle of step two is stacked on the TPU saddle in the forming cavity, the side of the forming cavity facing the ETPU saddle is a texture forming surface with uneven texture, the texture of the texture forming surface is skin texture, finally, the TPU forming machine is closed to form, the mold pressing temperature during forming is 90°-120°, and after forming, the ETPU saddle with skin texture on one side is obtained.