WO2020133663A1

WO2020133663A1 - Cork base insole and production and processing method therefor

Info

Publication number: WO2020133663A1
Application number: PCT/CN2019/075839
Authority: WO
Inventors: 龙汝倩
Original assignee: 瑞昌芯迈科技有限公司
Priority date: 2018-12-24
Filing date: 2019-02-22
Publication date: 2020-07-02
Also published as: CN109846138A

Abstract

Disclosed are a cork base insole and a manufacturing method. The insole comprises a base layer (1) and a flexible material layer (2) laid on the upper surface of the base layer (1), wherein the base layer (1) is formed by means of an environmentally friendly adhesive being added to cork particles and same then being subjected to hot pressing and curing. The forming quality and wearing comfort of the base layer (1) are guaranteed by means of a hot pressing and curing forming process, so that harmful chemical components emitted by the cork base insole are greatly reduced, and same is more environmentally friendly and safe; and a corresponding processing method results in the forming quality, the durability and the wearing comfort of a cork base insole product all being better taken into consideration under the condition that only the cork particles and the environmentally friendly adhesive are used as the raw material of the base layer (1).

Description

Cork base insole and its production and processing method

Technical field

The invention relates to the technical field of insole products, in particular to a cork-based insole and its production and processing method.

Background technique

As an important part of shoes, insoles have a greater impact on the wearing comfort of shoes. A pair of insoles with reasonable thickness design can make the feet healthy and comfortable. And with the development of science and technology, the material and manufacturing process of the insole have been greatly developed. It can not only change the internal environment of the shoe, but also change the force distribution of the sole, so if it can be based on the physiological structure of the foot and the space of the shoe cavity Due to the difference in size and the distribution characteristics of the pressure of the sole of the foot when walking, choosing an insole with an appropriate thickness can appropriately improve the comfort of the shoe, reduce the fatigue of wearing, and even reduce the damage to the foot caused by long-term wearing, and have certain foot protection Features.

Cork is commonly known as cork, cork, cork, etc. It is a skin processing product of cork oak trees. It has the characteristics of soft texture, elasticity, and not easy to be affected by chemicals. It is commonly used in the manufacture of plugs, mats, and floors. At present, there are also many cork insole products, the main structure of which is made by attaching fabric materials to the surface of the cork base, which has the advantages of light texture, elasticity, comfortable wearing, etc., and is welcomed by users.

However, with the strengthening of people's environmental awareness and health awareness, the environmental protection and chemical safety of cork insole products on the market are beginning to be questioned by people. The main reason is that although the flexible fabric layer of insole products (such as fabric fabric layer, leather Fabric layer, etc.) The environmental protection and safety issues of the processing technology have been relatively maturely solved, but in the cork insole products, the cork base mainly uses cork particles (ie cork oak bark particles) as the main raw material, and the function of adding a variety of chemical ingredients Reagents and adhesives to make cork substrates achieve better shaping, pressure resistance, ventilation, dehumidification and other effects, but when users buy cork insole products and during use, these functional reagents and adhesives are harmful Chemical components will gradually radiate outward, and the use environment of the insole is relatively closed and close to the human foot skin. The emission of harmful chemical components may affect the health of the foot skin. Therefore, the existing cork insole products and their processing and production technology are difficult to ensure the comfort and functionality of the product, and at the same time, they also take into account the environmental protection and chemical safety of the product. This has also become a problem to be solved in the industry. Overcome technical problems.

Summary of the invention

In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is how to provide a more environmentally friendly and chemically safe cork-based insole product to better solve the difficulties in the prior art cork insole products Good consideration of the environmental protection and safety performance of products.

In order to solve the above technical problems, the present invention adopts the following technical solutions:

A cork-based insole includes a base layer and a flexible material layer covering the upper surface of the base layer; the base layer is made of cork particles with an environmentally friendly adhesive and then hot-pressed and cured.

In the above cork base insole, as a preferred solution, the environmentally friendly adhesive uses an environmentally friendly polyurethane adhesive.

In the above cork-based insole, as an optional solution, the base layer is a flat-plate-shaped base structure with a thickness of 1 to 5 mm.

In the above cork base insole, as a preferred solution, in the base layer of the flat base structure, the weight ratio of the added amount of the cork particles to the environmentally friendly adhesive is 6:3 to 5.

In the above cork base insole, as another alternative, the base layer is a curved base structure, including a heel support area, an arch support area, and a sole support area that are sequentially connected; both sides of the heel support area And the back side are curved upwards to form a semi-enveloping arch, the front side of the heel support area is smoothly transitioned to the rear side of the arch support area; both sides of the arch support area are curved upward to form an arch , And the arch height corresponding to the medial arch area is higher than that corresponding to the lateral arch area, the front side of the arch support area is smoothly transitioned to the sole support area, and the arch height on both sides of the arch support area It gradually decreases from the back to the front, until the foot support area is equal to the edge of the foot support area; in the curved base structure, the thickness of the heel support area, the arch support area, and the foot support area gradually decreases.

In the above cork base insole, as a preferred solution, in the base layer of the curved base structure, the added weight ratio of the cork particles to the environmentally friendly adhesive is 7:3 to 5.

Correspondingly, the present invention also provides the production and processing methods of the above-mentioned flat base structure cork base insoles and curved base structure softwood base insoles; therefore, the present invention adopts the following technical solutions:

The production and processing method of the cork base insole with the above flat base structure includes the following steps:

a) Mix the cork particles with the environmentally friendly adhesive in a proportion of 6:3 to 5 by weight and weight to obtain a base mixed raw material and add it to the preheated flat molding mold;

b) Close the mold of the flat mold and control the temperature of the flat mold at 240-260°C to hot press the mixed materials of the substrate for 340 to 400 seconds, and the pressure of the hot press is 100 to 150 tons, so that the mixed materials of the base are hot pressed and cured Take out the flat slab with a thickness of 1～5mm and take it out;

c) Use the insole knife mold to punch and cut the base slab to obtain the base layer of the flat base structure;

d) The upper surface of the base layer of the flat base structure is covered with an adhesive layer of flexible material, and is subjected to trimming processing to obtain a finished product of a cork base insole.

In the above-mentioned method for producing and processing a cork-based insole, as a preferred solution, in the step a), the temperature of the preheated flat plate forming mold reaches 240 to 260°C.

The method for producing and processing the cork-based insole of the cork-based insole with the curved base structure includes the following steps:

1) Mix the cork particles with the environmentally friendly adhesive in a proportion of 7:3 to 5 by weight and weight to obtain a mixed material of the substrate, add it to the preheated curved substrate forming mold, and flatten it. Cover and lay flexible material layer;

2) Close the mold of the curved base forming mold, control the temperature of the curved base forming mold at 210-230°C, heat press for 200-220 seconds, and heat press pressure 150-200 tons, to obtain a cork base insole;

3) Take out the coarse cork-based insoles and trim them to obtain finished cork-based insoles.

In the above-mentioned method for producing and processing a cork-based insole, as a preferred solution, in the step 1), the temperature of the preheated curved substrate forming mold reaches 210 to 230°C.

Compared with the prior art, the present invention has the following beneficial effects:

1. The cork base insole of the present invention, the cork base layer is only made of cork particles through the addition of environmentally friendly adhesives, and is hot-pressed and cured without adding other chemical functional reagents, and the base layer is better guaranteed by the hot-press curing process The molding quality and wearing comfort make the cork-based insoles significantly reduce the harmful chemical components emitted to the skin of the feet during use, so that the cork insole products can take into account the better environmental safety and better meet people's cork insoles. Product health and environmental protection needs.

2. The cork base insole of the present invention can adopt different base layer structure design methods for different uses or suitable shoe types, and the present invention provides a corresponding production and processing method, so that only cork particles and environmentally friendly adhesives are used as Under the condition that the base layer is processed with raw materials, it can better take into account the performance requirements of the cork-based insole products, such as the forming quality, durability and wearing comfort.

3. The cork-based insole of the present invention and its production and processing method have very good market application prospects.

BRIEF DESCRIPTION

FIG. 1 is a schematic view of the bottom structure of the cork-based insoles according to

Embodiments

1 and 2 of the present invention.

FIG. 2 is a schematic view of a side view of a cork-based insole according to an embodiment of the present invention.

3 is a flowchart of a method for producing and processing a cork-based insole according to an embodiment of the present invention.

FIG. 4 is a schematic view of a side view of a cork base insole according to Embodiment 2 of the present invention.

FIG. 5 is a three-dimensional structural diagram of a cork-based insole according to Embodiment 2 of the present invention.

6 is a flow chart of a method for producing and processing a cork-based insole according to Embodiment 2 of the present invention.

detailed description

The invention provides a cork base insole, which includes a base layer and a flexible material layer covering the upper surface of the base layer. The base layer is made of cork particles and an environmentally friendly adhesive after hot pressing and curing. In specific implementation, the environmentally friendly adhesive used may be an environmentally friendly and safe adhesive such as an environmentally friendly polyurethane adhesive. In this way, a worthy cork-based insole is produced. The cork base layer is made of cork particles only by adding environmentally friendly adhesives and then hot-pressed and cured, without adding other chemical functional reagents that are harmful to the human body. When the environmental protection safety can be guaranteed, the cork base insole product made by this process can make the cork base insole products have the unique wearing comfort of the cork base, while ensuring that the cork base insole products are in use The distribution of harmful chemical components to the skin of the foot is greatly reduced, so that the cork insole products can take into account the better environmental protection and safety, and better meet the health and environmental protection needs of people for cork insole products.

The cork base insole of the present invention can only use cork particles and environmentally friendly adhesives as its base layer processing raw materials. It is necessary to combine the hot-press curing molding process to better ensure the molding quality and wearing comfort of the base layer. . However, for different purposes or suitable shoe types, the structural design of cork-based insoles will be different, and the corresponding processing requirements for hot press curing molding are also different. The following describes the different structural design, production and processing technology of the cork-based insole of the present invention through two embodiments.

Example one:

The cork-based insole of the present invention can be designed as a flat-shaped insole, as shown in FIGS. 1 and 2, that is, the base layer 1 of the insole is designed as a flat-shaped flat-based structure, and the upper surface of the flat-based structure is covered with flexible The material layer 2 can be applied to various footwear such as business leather shoes, casual shoes, sports shoes, etc., to increase the thickness of the sole and increase the wearing comfort. The shape of the wearing surface of different shoe soles is different, and the cork-based insole has certain characteristics of shapeability through the base layer of cork material. The design requirements of the cork-based insole of the flat base structure need to be better after wearing The shape of the wearing surface that fits the soles of different footwear to ensure better wearing comfort. Therefore, the thickness of the flat base structure should not be too thick; but if it is designed too thin, it is not only not good for improving the wearing comfort, but also only Under the condition of using cork particles and environmentally friendly adhesives as the raw materials for the processing of the base layer, it is difficult to ensure the quality and durability of the base layer. Based on these factors, for the cork base insoles with flat base structure, the base layer thickness is preferably designed to be 1 to 5 mm, which is more conducive to ensuring the molding quality and wearing comfort.

From the perspective of production and processing, since the thickness of the base layer of the cork base insole with a flat base structure is only designed to be 1 to 5 mm, if the amount of the environmentally friendly adhesive added in the base layer is too low, it is easy to cause insufficient bonding strength and easy breakage of the cork particles. In turn, it affects the quality and durability of hot-press curing molding, but too high an amount of environmentally friendly adhesives will affect the cork base layer's moldability, elasticity, and breathability, etc., which will have a negative impact on wearing comfort. Therefore, in the base layer of the flat base structure, the weight ratio of the added amount of cork particles to the environmentally friendly adhesive is preferably 6:3 to 5. The production and processing method of the cork base insole with flat base structure is shown in Figure 3:

a) Mix the cork particles with the environmentally friendly adhesive in a proportion of 6:3 to 5 by weight and weight to obtain a base mixed raw material and add it to the pre-heated flat molding mold. The shape of the cavity of the flat mold is a flat cavity. Before adding the base mixed raw materials to the flat molding mold, the flat molding mold needs to be preheated to make the flat molding mold reach the temperature of the hot pressing working condition, that is, 240 to 260°C, so as to ensure the rapid progress of the subsequent hot pressing process. The preheating time of the flat mold can be determined according to the actual processing situation. If it is preheated from room temperature to hot pressing, it usually needs more than 40 minutes to preheat. If the flat mold has been previously hot pressed, it can be pre-processed. Heat for 10 to 20 minutes.

b) Close the mold of the flat mold and control the temperature of the flat mold at 240-260°C to hot press the mixed materials of the substrate for 340 to 400 seconds, and the pressure of the hot press is 100 to 150 tons, so that the mixed materials of the base are hot pressed and cured After obtaining a base plate blank having a thickness of 1 to 5 mm, it is taken out. The hot pressing temperature, time and pressure of this step all need to be strictly controlled. For the above mixing ratio of flat base structure cork particles and environmentally friendly adhesives, the temperature is too high and the hot pressing time is too long, which is likely to cause the base slab Scorch, excessive hot pressing pressure will destroy the cork particle structure and cause the elasticity and supportability of the base layer to be affected, but too low temperature, insufficient hot pressing time, and too low hot pressing pressure make it difficult to ensure the bonding strength and shaping effect of the base layer .

c) Use the insole knife mold to punch and cut the base slab to obtain the base layer of the flat base structure. After the base slab is obtained, the base layer of the flat base structure of the corresponding size can be punched and cut according to different sizes of the cork base insoles produced.

d) The upper surface of the base layer of the flat base structure is covered with an adhesive layer of flexible material, and is subjected to trimming processing to obtain a finished product of a cork base insole. In this step, the edge trimming process may adopt stamping edge trimming, and may also adopt a cutting machine processing or manual edge trimming. Thus, the cork-based insole product with a flat-plate base structure in this embodiment is produced.

Example two:

The cork base insole of the present invention can be designed as an insole with a curved surface structure. The insole bottom view structure is still shown in FIG. 1, and its side and three-dimensional structure views are shown in FIGS. 4 and 5, respectively, that is, the base of the insole. The bottom layer 1 is designed as a curved base structure, and the specific structure of the base layer 1 includes a heel support area 11, a arch support area 12, and a foot support area 13 connected in sequence; both sides and the rear side of the heel support area 11 are upwardly arced The curved shape forms a semi-enveloping arch, and the front side of the heel support area 11 smoothly transitions to the rear side of the arch support area 12; both sides of the arch support area 12 curve upward to form an arch, and correspond The arch height on the side of the medial arch area 121 is higher than the side corresponding to the lateral arch area 122, the anterior side of the arch support area 12 is smoothly transitioned to the sole support area 13, and the arches on both sides of the arch support area 12 The lifting height gradually decreases from back to front, until the foot support area 13 is equal to the edge of the foot support area 13; the thickness of the heel support area 11, the arch support area 12, and the foot support area 13 in the curved base structure Gradually reduced; the upper surface of the curved base structure is covered with a layer 2 of flexible material. The cork base insole designed by this structure, the cork base layer has a curved supporting structure, which can provide better fit support for the sole of the foot, arch and heel, so as to achieve better support and foot protection, mainly The utility model can be applied to footwear such as business leather shoes and casual shoes, and is used for improving the problem that the wearing surface of the sole is flat and the supporting foot effect is not good.

Since the cork-based insole of the curved base structure mainly emphasizes the support performance, the overall thickness of the base layer can be made thicker. In the curved base structure, the thickness of the last position of the heel support area can be designed to reach 12-30 mm. The thickness of the front end of the support area can be designed to be between 1 and 5 mm. From the perspective of production and processing, the amount of environmentally friendly adhesive added in the base layer can be lower, and the weight ratio of cork particles to the amount of environmentally friendly adhesive added is The ratio range of 7:3～5 can better meet the requirements of curing molding quality, durability, supportability and new comfort. The production process of the cork base insole with curved base structure is shown in Figure 6:

1) Mix the cork particles with the environmentally friendly adhesive in a proportion of 7:3 to 5 by weight and weight to obtain a mixed material of the substrate, add it to the preheated curved substrate forming mold, and flatten it. Cover with a layer of flexible material. The cavity shape of the curved base forming mold is a cavity shape matching the curved base structure. Before the base mixed raw materials are added to the curved base forming mold, the curved base forming mold needs to be preheated to make the curved base forming mold reach the temperature of the hot pressing working condition, that is, 210 to 230 ℃, to ensure the rapid progress of the subsequent hot pressing process . The preheating time of the curved base forming mold can be determined according to the actual processing situation. If it is preheated from room temperature to hot pressing, it usually needs more than 40 minutes to preheat. If the curved base forming mold has been previously subjected to the hot pressing process, then It can be preheated for 10-20 minutes before processing.

2) Close the mold of the curved base forming mold, and control the temperature of the curved base forming mold at 210 to 230°C to heat press the mixed raw materials of the base for 200 to 220 seconds, and the hot press pressure is 150 to 200 tons to obtain a cork base insole Crude.

For the cork-based insole with curved base structure, the production of the cork-based insole rough product adopts a process of hot pressing after filling the base mixed raw material in the curved base forming mold and laying the flexible material layer directly for hot pressing. To achieve two goals, on the one hand, the base mixed raw material is hot-pressed and cured to form a curved heel support area, arch support area, and sole support area; on the other hand, the flexible material layer can be directly shaped and pasted through the hot-pressing process Close on the upper surface of the base layer. Compared with the flat substrate structure of the first embodiment, the amount of the environmentally friendly adhesive added in the mixed raw materials of the curved substrate structure substrate is relatively low, and it is hot pressed together with the flexible material layer, so the hot pressing process uses a lower The hot pressing temperature of 210～230℃, the hot pressing time is 200～220 seconds, and the hot pressing pressure is 150～200 tons, which is enough to ensure the bonding strength and shaping effect of the base layer while better avoiding the base layer scorching and flexible materials. Thermal damage of the layer. But in the same way, the above-mentioned hot pressing temperature, time, and pressure size all need to be controlled more strictly according to the above process, so as to take into account the bonding strength of the base layer and the hot pressing setting quality.

Because the rough cork base insole is filled with the base mixed raw material in the curved base forming mold, and then laid by the flexible material layer directly after hot pressing, the base mixed raw material flattened in the curved base forming mold is hot During the pressing process, some of the mixed base material will be extruded from the mold and adhere to the cork-based insoles around the rough product, which needs to be trimmed and processed; and before the hot pressing process, due to the laying area of the flexible material layer, curved surface paste should be considered The amount of expansion and contraction after closing, so there will be a surplus in the laying area of the flexible material layer, which also requires trimming processing. Therefore, after trimming and processing the rough cork-based insole, the finished product of the cork-based insole can be obtained. In this step, the edge trimming process may adopt stamping edge trimming, and may also adopt a cutting machine processing or manual edge trimming. Thus, the cork-based insole product having a curved base structure in this embodiment is produced.

The inventor has tried many experiments, and only adding environmentally friendly adhesives to the cork particles to produce cork insoles is very difficult to produce and process. If too much environmentally friendly adhesives are added, the insoles will not be easy to process and shape. The insole has a heavy texture and cannot maximize the natural moisture absorption and perspiration of cork particles; if the environmental protection adhesive is added too little, it will cause the produced cork insole to have weak bending resistance, unable to meet the basic wearing needs, or even Cork dross is generated. If there is no suitable processing technology and processing parameters, the defective rate/rework rate/ scrap rate caused by the production of insoles will be greatly increased, resulting in waste of resources and labor.

When processing traditional cork-based insoles, a large number of chemical additives are used, which is not good for environmental protection and chemical safety. At the same time, after a large number of bending experiments, the cork-based insoles produced by traditional techniques can withstand normal walking and bending tests (the bending angle is not (Over 45°) The number of times is about 650,000, and the strong bending test with a bending angle exceeding 90° is about 300,000 times.

The flat base structure softwood base insole and the curved base structure softwood base insole produced by the above two processing methods of the present invention not only improve the environmental protection and chemical safety of the product, but also undergo a lot of product bending tests. The base structure of the cork base insole product can withstand more than 540,000 times of normal walking bending test (bending angle not exceeding 45°), and the strong bending test of the bending angle exceeding 90° is more than 230,000 times, while the curved base structure of the cork base Insole products can withstand more than 520,000 times of normal walking bending test (bending angle does not exceed 45°), and strong bending test with bending angle exceeding 90° is more than 210,000 times; it is calculated according to the average person walking 5,000 steps per day, wearing for three months The above is no pressure, and it fully meets the normal needs of changing the insole every three months (foot science experts suggest: replace the insole every three months). It can be seen that while the cork-based insole of the present invention better balances environmental protection and chemical safety, it can also well take into account the durability and service life requirements of the cork-based insole product.

In summary, the cork base insole of the present invention, the cork base layer only uses cork particles through the addition of environmentally friendly adhesives, and is hot-pressed and cured, without adding other chemical functional reagents, with the help of hot-pressed and cured molding process. The molding quality and wearing comfort of the base layer makes the cork-based insoles significantly reduce harmful chemical components to the skin of the feet during use, so that the cork insole products can take into account better environmental safety and better meet people. Health and environmental protection requirements for cork insole products; and, the cork-based insole of the present invention can adopt different base layer structure design methods for different uses or suitable shoe types, and the present invention provides corresponding production and processing methods, so that only Under the condition of using cork particles and environmentally friendly adhesives as the raw materials for the base layer processing, it can better take into account the performance requirements of the cork base insole products such as molding quality, durability and wearing comfort, and has a good market application prospect.

Lastly, the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be implemented Modifications or equivalent replacements without departing from the spirit and scope of the technical solutions of the present invention should be covered by the scope of the claims of the present invention.

Claims

A cork-based insole, characterized by comprising a base layer and a flexible material layer covering the upper surface of the base layer; the base layer is made of cork particles with an environmentally friendly adhesive and then hot-pressed and cured.
The cork base insole according to claim 1, wherein the environmentally friendly adhesive is an environmentally friendly polyurethane adhesive.
The cork-based insole according to claim 1, wherein the base layer is a flat-plate-shaped base structure with a thickness of 1 to 5 mm.
The cork base insole according to claim 3, characterized in that, in the base layer of the flat base structure, the weight ratio of the added amount of cork particles to the environmentally friendly adhesive is 6:3~5.
The cork base insole according to claim 1, wherein the base layer is a curved base structure, including a heel support area, an arch support area and a sole support area connected in sequence; both sides of the heel support area And the back side are curved upwards to form a semi-enveloping arch, the front side of the heel support area is smoothly transitioned to the rear side of the arch support area; both sides of the arch support area are curved upward to form an arch , And the arch height corresponding to the medial arch area is higher than that corresponding to the lateral arch area, the front side of the arch support area is smoothly transitioned to the sole support area, and the arch height on both sides of the arch support area It gradually decreases from the back to the front, until the foot support area is equal to the edge of the foot support area; in the curved base structure, the thickness of the heel support area, the arch support area, and the foot support area gradually decreases.
The cork base insole according to claim 5, wherein in the base layer of the curved base structure, the weight ratio of the added amount of the cork particles to the environmentally friendly adhesive is 7:3~5.
A method for producing and processing a cork-based insole according to claim 3, comprising the following steps:

a) Mix the cork particles with the environmentally friendly adhesive in a proportion of 6:3 to 5 by weight and weight to obtain a base mixed raw material and add it to the preheated flat molding mold;

b) Close the mold of the flat mold and control the temperature of the flat mold at 240-260°C to hot press the mixed materials of the substrate for 340 to 400 seconds, and the pressure of the hot press is 100 to 150 tons, so that the mixed materials of the base are hot pressed and cured Take out the flat slab with a thickness of 1～5mm and take it out;

c) Use the insole knife mold to punch and cut the base slab to obtain the base layer of the flat base structure;

d) The upper surface of the base layer of the flat base structure is covered with an adhesive layer of flexible material, and is subjected to trimming processing to obtain a finished product of a cork base insole.
The method for producing and processing a cork-based insole according to claim 7, wherein in step a), the temperature of the pre-heated flat plate forming mold reaches 240-260°C.
A method for producing and processing a cork-based insole according to claim 5, comprising the following steps:

1) Mix the cork particles with the environmentally friendly adhesive in a proportion of 7:3 to 5 by weight and weight to obtain a mixed material of the substrate, add it to the preheated curved substrate forming mold, and flatten it. Cover and lay flexible material layer;

2) Close the mold of the curved base forming mold, control the temperature of the curved base forming mold at 210-230°C, heat press for 200-220 seconds, and heat press pressure 150-200 tons, to obtain a cork base insole;

3) Take out the coarse cork-based insoles and trim them to obtain finished cork-based insoles.
The method for producing and processing a cork-based insole according to claim 9, wherein in step 1), the temperature of the pre-heated curved substrate forming mold reaches 210 to 230°C.