Processing method of PVC foam pad material

Abstract

A processing method of a PVC foam pad material comprises the following steps: cleaning a PVC foam pad substrate, and preparing a TPU adhesive film coiled material and a PVC color printing film coiled material at a composite station to obtain a composite material; a TPU adhesive film coiled material is arranged on the left side, corresponding to the PVC foaming pad substrate, of the composite station, a TPU adhesive film coiled material is arranged on the right side, a PVC color printing film coiled material is arranged at the position corresponding to the lower portion of a TPU adhesive film roll left unwinding roller, a PVC color printing film coiled material is arranged at the position corresponding to the lower portion of a TPU adhesive film roll right unwinding roller, and a PVC color printing film coiled material is arranged at the position corresponding to the lower portion of the TPU adhesive film roll right unwinding roller. When the PVC foaming pad substrate moves downwards, a pair of heating plates is arranged in an area between TPU adhesive film coiled materials on a left TPU adhesive film roll unwinding roller and a right TPU adhesive film roll unwinding roller respectively, and a cooling pattern roller is arranged below the pair of heating plates; and compounding to obtain the PVC foaming cushion material. The method has the advantages of simple processing steps; the obtained PVC foam pad material has a long service life; the pursuit of people on personalization is met; and environmental protection and resource saving are embodied.

Description

Technical Field

[0001] The invention belongs to the technical field of floor mat material preparation, and in particular relates to a processing method of a PVC foam pad material. Background Art

[0002] The aforementioned PVC foam pad material is also called PVC foam floor mat material, which is obtained by mixing PVC resin with various additives such as foaming agent, plasticizer, stabilizer, lubricant and filler, foaming and subsequent treatment such as cooling, etc. The PVC foam material is cut and the cut is processed according to the corresponding process requirements, and is widely used in home places (such as bathrooms and foyers), public places (such as hospitals, shopping malls, sports venues) and special places (such as near swimming pools, laundry rooms, kindergarten indoor floors), etc.

[0003] The PVC foam pad material in the prior art, i.e., the PVC foam floor mat material, is generally obtained by cutting the sheet into a specific size after the aforementioned PVC resin and various additives and fillers are foamed and formed by a foaming process. The sheet of the corresponding color can be obtained by adding the required colorant to the additive. Since the sheet is a bare material, the floor mat units of various specifications obtained therefrom, which can even be interlocked with each other by the mortise and tenon effect, are essentially bare floor mats. The exposed PVC foam material, i.e., sheet material and floor mats made therefrom, have the following deficiencies: poor physical properties, specifically, the sheet material and floor mats made therefrom have unsatisfactory tensile strength, tear strength and abrasion resistance; poor chemical stability, specifically, the sheet material and floor mats made therefrom cannot resist the erosion of chemical substances, which affects the floor mats' ability to maintain good performance under special environments. In particular, PVC will denitrify and dehydrogenate at high temperatures, causing degradation reactions. The release of hydrogen chloride not only affects the performance of PVC, but also may cause harm to the human body; it is relatively troublesome to recycle and reuse the discarded PVC during use; if colorants are not added to the additives, then the appearance and decorativeness will be lost, and it will be difficult to meet people's expected personalized pursuit requirements, and the user's favorability will also be affected accordingly.

[0004] Due to considerations not limited to the aforementioned factors, it is of positive significance to explore a processing method for PVC foam pad materials that can not only significantly improve physical properties and chemical stability, but also enhance appearance and decorativeness and meet people's expectations for personalized pursuit, and can also be easily recycled and reused when discarded after use. The technical solution to be introduced below was produced in this context. Summary of the invention

[0005] The task of the present invention is to provide a processing method for a PVC foam pad material. The PVC foam pad material obtained by the method can not only significantly improve the physical and chemical properties, but also well reflect the appearance and decorativeness and meet people's pursuit of individuality. It can also be conveniently recycled and reused after use to save resources and reflect the spirit of circular economy.

[0006] The task of the present invention is accomplished by a method for processing a PVC foam pad material, comprising the following steps: A) preparing a composite material, using a cleaning agent to clean a PVC foam pad substrate sheet with no cracks and / or hollowing defects on the surface, which is purchased from a commercial channel or prepared independently in a previous process, in order to remove surface oil, wax and / or dust, and then sending the sheet to a composite station after the cleaning treatment, and preparing a TPU film coil and a PVC color printing film coil with the same width as the PVC foam pad substrate sheet and in a roll shape to obtain a composite material; B) Preparation before compounding: at the compounding station and on the left side of the PVC foam pad substrate corresponding to step A), the TPU film coil is arranged with the left unwinding roller of the TPU film roll as a carrier, and on the right side of the PVC foam pad substrate and at a position corresponding to the left unwinding roller of the TPU film roll, the TPU film coil is also arranged with the right unwinding roller of the TPU film roll as a carrier, and at a position corresponding to the lower side of the left unwinding roller of the TPU film roll, the PVC color-printed film coil is arranged with the left unwinding roller of the PVC color-printed film roll as a carrier, and at a position corresponding to the lower side of the right unwinding roller of the TPU film roll, the right unwinding roller of the PVC color-printed film roll is used as a carrier. The PVC color printing film coil is also provided. When the PVC foam pad substrate moves downward, a pair of heating plates are provided in the area between the TPU film coils respectively located on the left and right unwinding rollers of the TPU film roll. The heating plates correspond to each other on the left and right sides and have a space between the opposite sides for the PVC foam pad substrate to pass through. The heating plates have a width equal to the width of the PVC foam pad substrate and a height of one third, one fourth or one fifth of the width of the PVC foam pad substrate. The space between the heating plates constitutes a substrate heating channel. A cooling pattern roller having a length adapted to the width of the PVC foam pad substrate is provided below the pair of heating plates. C) compounding, so that the PVC foam pad substrate described in step A) and step B) passes through the substrate heating channel between the pair of heating plates in a heated state, goes out of the substrate heating channel downward, and the TPU film withdrawn from the TPU film coil is compounded to the substrate heating channel to obtain a double-sided heated surface of the PVC foam pad substrate. At the same time, the PVC color-printed film withdrawn from the PVC color-printed film coil is compounded to the outer side of the TPU film, so that the PVC foam pad substrate with the TPU film and the PVC color-printed film compounded on both side surfaces of the PVC foam pad substrate from the inside to the outside moves downward and is cooled when passing between the pair of cooling pattern rollers, comes out of the pair of cooling pattern rollers and is pulled and rolled up to obtain the PVC foam pad material.

[0007] In a specific embodiment of the present invention, the cleaning agent in step A) is sodium borate peroxide monohydrate or isopropyl alcohol with a mass percentage concentration of 45-55%; the sodium borate peroxide monohydrate is monohydrate (NaBO3·H2O), tetrahydrate (NaBO3·4H2O) or trihydrate (NaBO3·3H2O).

[0008] In another specific embodiment of the present invention, the cooling temperature of the cooling pattern roller in step B) and step C) is 5-10°C, and the cooling method of the cooling pattern roller is circulating cooling with both ends connected to a cooling medium supply mechanism; the cooling medium is water, oil, diphenyl ether or ethanol.

[0009] In another specific embodiment of the present invention, the width of the PVC foam pad substrate in steps A), B) and C) is 150 cm, 180 cm or 200 cm, and the thickness of the PVC foam pad substrate is 2-20 mm.

[0010] In another specific embodiment of the present invention, the heating temperature of the heating plate in steps B) and C) is 180-250°C.

[0011] In another specific embodiment of the present invention, the heating plate is a heating plate made of a polyimide heating plate or a silicone heating plate; the heating plate made of the polyimide heating plate is a heating plate with a polyesterimide film as an outer insulator and a nickel-chromium alloy etched heating plate as an inner conductive heating element, and the outer insulator and the inner conductive heating element are tightly heat-sealed under high temperature and high pressure to form an integrated structure; the heating plate made of the silicone heating plate is a heating plate composed of a composite of silicone rubber and a glass fiber cloth woven from nickel alloy wires wrapped around glass fiber wires.

[0012] In a more specific embodiment of the present invention, the withdrawal speed of the TPU film withdrawn from the TPU film coil and the withdrawal speed of the PVC color-printed film withdrawn from the PVC color-printed film coil described in step C) are the same as the speed at which the PVC foam pad substrate is conveyed to the substrate heating channel. When the PVC foam pad substrate passes through the area of ​​the substrate heating channel, it does not contact a pair of heating plates, and a distance of 0.5-10 mm is maintained between the two side surfaces and the pair of heating plates respectively.

[0013] In a further specific embodiment of the present invention, the speed at which the PVC foam pad substrate is conveyed to the substrate heating channel, the speed at which the TPU adhesive film is withdrawn, and the speed at which the PVC color-printed film is withdrawn are all 1-10 m / min.

[0014] In yet another specific embodiment of the present invention, the thickness of the TPU film is 0.015-0.03 mm; the thickness of the PVC color-printed film is 0.05-0.15 mm.

[0015] In a further specific embodiment of the present invention, the TPU film is composed of the following raw materials in proportion by weight: 40-60 parts of polyester polyol, 15-20 parts of pressure-sensitive adhesive, 15-20 parts of a diisocyanate mixture of hexamethylene diisocyanate and xylene diisocyanate in a weight ratio of 1:2, 10-20 parts of modified thermoplastic elastomer, 5-10 parts of rosin resin, 0.5-1 part of carbon black with an average particle size of 20-50nm, 1-1.5 parts of plasticizer, 0.01-0.03 parts of organic tin catalyst, 0.6-1.2 parts of imidazole accelerator and 1.5-2 parts of antioxidant; the polyester polyol is polycaprolactone diol, polybutylene adipate diol or polyethylene adipate diol; the pressure-sensitive adhesive is synthetic A mixed pressure-sensitive adhesive in which a rubber pressure-sensitive adhesive and a natural rubber pressure-sensitive adhesive are mixed in a mass ratio of 0.5:1.5; the modified thermoplastic elastomer is a blended modified 1,2-syndiotactic polyethylene polymer of a high-fluidity polyester TPU having a melt index of 25-30 / 10min under the measuring conditions of 190°C and 2.16kg; the plasticizer is dioctyl phthalate (DOP), dibutyl phthalate (DBP) or dioctyl terephthalate; the organic tin catalyst is dibutyl tin dilaurate, dibutyl tin dilaurate or dioctyl oxide; the imidazole accelerator is 2-methylimidazole, 2-isopropylimidazole or 2-propylimidazole; the antioxidant is antioxidant 1098, antioxidant 1010 or antioxidant 1076.

[0016] The technical solution provided by the present invention can meet the requirements of industrialized enlarged production because of its simple processing steps; because the TPU film and the PVC color-printed film are respectively compounded on both sides of the PVC foam pad substrate, and because the TPU film has ideal physical and chemical properties, the processed PVC foam pad material can have a long service life; because the PVC color-printed film is compounded outside the TPU film, it can well reflect the appearance and decorativeness and meet people's pursuit of individuality; because the PVC can be recycled and reused after being discarded, it can reflect environmental protection, save resources, and reflect a good circular economy spirit. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the processing method of the present invention. DETAILED DESCRIPTION Example 1

[0018] The processing method of the present invention is Figure 1 The PVC foam pad material is pulled or rolled up in the direction indicated by the hollow arrow 8 shown. In this embodiment, the arrangement of the relevant components is from top to bottom according to the direction indicated by the hollow arrow 8, but can also be arranged from back to front, from front to back, from left to right or from right to left as needed, and is not limited by the direction indicated by the hollow arrow 8 of the present invention.

[0019] The processing method of the PVC foam pad material provided in this embodiment comprises the following steps: A) preparing composite materials, using sodium peroxide borate monohydrate (NaBO3·H2O), trihydrate (NaBO3·3H2O) or tetrahydrate (NaBO3·4H2O) to clean the PVC foam pad substrate 1 with a width of 200 cm and a uniform surface without cracks, pits and / or hollowing defects obtained from commercial channels, and removing oil, wax and / or dust from both sides of the surface of the PVC foam pad substrate 1, and then sending the cleaning treatment to Figure 1 The composite station where the equipment shown is located is equipped with a TPU film coil 2 with the same width as the PVC foam pad substrate 1, i.e., a width of 200 cm and each wound on a core tube and in a roll shape, and a PVC color printing film coil 3 obtained from a commercial channel, on the frame of the composite station to obtain a composite material; B) Preparation before compounding, at the compounding station and on the left side of the PVC foam pad substrate 1 corresponding to step A), set Figure 1The TPU film roll left unwinding roller 6a on the frame not shown in the figure is used as a carrier to set the TPU film coil 2, and on the right side corresponding to the PVC foam pad substrate 1 and at a position corresponding to the left unwinding roller 6a of the TPU film roll, the TPU film roll right unwinding roller 6b set on the frame is used as a carrier to set the TPU film roll 2, and at a position corresponding to the lower side of the left unwinding roller 6a of the TPU film roll, the PVC color-printed film roll left unwinding roller 7a set on the frame is used as a carrier to set the PVC color-printed film roll 3, and at a position corresponding to the lower side of the right unwinding roller 6b of the TPU film roll, the PVC color-printed film roll right unwinding roller 7b set on the frame is used as a carrier to set the PVC color-printed film roll 3, When the pad substrate 1 moves downward, it passes through the area between the TPU film coil 2 located on the left and right unwinding rollers 6a and 6b of the TPU film roll. A pair of heating plates 4 (electric heating plates) are arranged on the frame as a carrier, which are both corresponding to each other (also called "parallel") and have a width equal to the width of the PVC foam pad substrate 1 and a height of one third of the width of the PVC foam pad substrate 1 (about 66.66 cm) between the opposite sides for the PVC foam pad substrate 1 to pass through. The space between the pair of heating plates 4 constitutes a substrate heating channel 41. Below the pair of heating plates 4, a cooling pattern roller 5 driven by a power mechanism is arranged with a length corresponding to the width of the PVC foam pad substrate 1 using the aforementioned frame as a carrier. According to professional common sense, Figure 1 The left and right rolls of TPU film coil 2 and PVC color printing film coil 3 in the position state shown are respectively placed on the left and right unwinding rollers 6a, 6b of the TPU film roll and the left and right unwinding rollers 7a, 7b of the PVC color printing film roll through their respective core tubes. The cooling pattern roller 5 refers to a roller body having a desired pattern formed on the surface so that the cooling pattern roller 5 forms a pattern on the surface of the final PVC foam pad material, and the PVC foam pad material with different patterns formed on the surface can be obtained by replacing the cooling pattern roller 5 with different patterns. The thickness of the PVC foam pad substrate 1 described in step A) and this step is 12mm. The heating plate 4 described in this embodiment is a heating plate made of polyimide electric heating plate. The heating plate made of the polyimide electric heating plate is a heating plate with a polyimide film as an outer insulator and a nickel-chromium alloy etching heating plate as an inner conductive heating element, and the outer insulator and the inner conductive heating element are tightly heat-sealed at high temperature and high pressure to form an integrated structure; C) Compounding, the PVC foam pad substrate 1 with a thickness of 12 mm described in step A) and step B) is passed through the substrate heating channel 41 between a pair of heating plates 4 in a heated state and at a heating temperature of 220° C. The TPU film 21 withdrawn from the TPU film coil 2 is compounded to the substrate heating channel 41 to obtain the surface of the double-sided heated PVC foam pad substrate 1 with a heating temperature of 220° C. At the same time, the PVC color-printed film 31 withdrawn from the PVC color-printed film coil 3 is compounded to the outer side of the PTU film 21, so that the two side surfaces of the PVC foam pad substrate 1 are compounded with the TPU film 21 and the PVC film 21 in sequence from the inside to the outside. The color-printed film 31 is moved downward and passed through a pair of cooling pattern rollers 5 to obtain a cooling temperature of 8°C. The cooling method of the cooling pattern roller 5 is a circulating cooling method (through a circulating pump and a cooling medium introduction and outlet pipeline) connected to a cooling medium supply mechanism at both ends. The cooling medium of this embodiment is water. The pair of cooling pattern rollers 5 are passed through and the winding roller located in front of the pair of cooling pattern rollers 5 and driven by power is pulled and collected (wound up) in a traction manner. That is to say, when the winding roller is pulled in a traction manner, the TPU film 21 and the PVC color-printed film 31 are simultaneously compounded on both sides of the PVC foam pad substrate 1 to obtain a PVC foam pad material. In this embodiment, the aforementioned TPU The speeds of the adhesive film coil 2 and the TPU adhesive film 21 and the PVC color-printed film 31 respectively withdrawn (unwound) from the PVC color-printed film coil 3 are equal to the moving speed of the PVC foam pad substrate 1, and the speeds of the three are all 6m / min. The aforementioned PVC foam pad substrate 1 does not contact the pair of heating plates 4 when passing through the area of ​​the aforementioned substrate heating channel 41, and the two sides are respectively kept at a distance of 5mm from the pair of heating plates 4. The thickness of the TPU adhesive film 21 is 0.015mm, and the thickness of the aforementioned PVC color-printed film 31 is 0.15mm. In this step, the aforementioned TPU adhesive film 21 is composed of the following raw materials in proportion by weight: polycaprolactone diol 40 1 part, 15 parts of a mixed pressure-sensitive adhesive in which a synthetic rubber pressure-sensitive adhesive and a natural rubber pressure-sensitive adhesive are mixed in a mass ratio of 0.5:1.5, 17 parts of a diisocyanate mixture in which hexamethylene diisocyanate and xylylene diisocyanate are mixed in a weight ratio of 1:2, 10 parts of a blended and modified 1,2-syndiotactic polyethylene polymer having a melt index of 25-30 / 10min under the measurement conditions of 190°C and 2.16kg for high-fluidity polyester TPU, 8 parts of rosin resin, 1 part of carbon black having an average particle size of 20-50nm, 1.5 parts of dioctyl phthalate (DOP), 0.02 parts of dibutyltin dilaurate, 0.6 parts of 2-isopropylimidazole and 1 part of antioxidant 1010. Example 2

[0020] A) preparing composite materials, using 45% by mass isopropyl alcohol to clean the PVC foam pad substrate 1 with a width of 180 cm and a uniform surface without cracks, pits and / or hollowing defects, and then sending the PVC foam pad substrate 1 to Figure 1 The composite station where the equipment shown is located is equipped with a TPU film coil 2 with the same width as the PVC foam pad substrate 1, i.e., a width of 180 cm, each wound on a core tube and in a roll shape, and a PVC color printing film coil 3 obtained from a commercial channel, on the frame of the composite station to obtain a composite material; B) Preparation before compounding, at the compounding station and on the left side of the PVC foam pad substrate 1 corresponding to step A), set Figure 1 The TPU film roll left unwinding roller 6a on the frame not shown in the figure is used as a carrier to set the TPU film coil 2, and on the right side corresponding to the PVC foam pad substrate 1 and at a position corresponding to the left unwinding roller 6a of the TPU film roll, the TPU film roll right unwinding roller 6b set on the frame is used as a carrier to also set the TPU film coil 2, and at a position corresponding to the lower side of the left unwinding roller 6a of the TPU film roll, the PVC color-printed film roll left unwinding roller 7a set on the frame is used as a carrier to set the PVC color-printed film coil 3, and at a position corresponding to the lower side of the right unwinding roller 6b of the TPU film roll, the PVC color-printed film roll right unwinding roller 7b set on the frame is used as a carrier to also set the PVC color-printed film coil 3, and at a position corresponding to the lower side of the right unwinding roller 6b of the TPU film roll, the PVC color-printed film roll right unwinding roller 7b set on the frame is used as a carrier to also set the PVC color-printed film coil 3, When the foam pad substrate 1 moves downward, it passes through the area between the TPU film coil 2 located on the left and right unwinding rollers 6a and 6b of the TPU film roll. A pair of heating plates 4 (electric heating plates) are arranged on the frame as a carrier, which are both corresponding to each other (also called "parallel") and have a width equal to the width of the PVC foam pad substrate 1 and a height of one-fifth of the width of the PVC foam pad substrate 1 (i.e. 36 cm) between the opposite sides for the PVC foam pad substrate 1 to pass through. The space between the pair of heating plates 4 constitutes a substrate heating channel 41. A cooling pattern roller 5 driven by a power mechanism is arranged below the pair of heating plates 4 with a length corresponding to the width of the PVC foam pad substrate 1 and the aforementioned frame as a carrier. According to professional common sense, Figure 1The left and right rolls of TPU film coil 2 and PVC color printing film coil 3 in the position state shown are respectively placed on the left and right unwinding rollers 6a, 6b of the TPU film roll and the left and right unwinding rollers 7a, 7b of the PVC color printing film roll through their respective core tubes. The cooling pattern roller 5 refers to a roller body having a desired pattern formed on the surface so that the cooling pattern roller 5 forms a pattern on the surface of the final PVC foam pad material, and by replacing the cooling pattern roller 5 with different patterns, a PVC foam pad material with different patterns formed on the surface can be obtained accordingly. The thickness of the PVC foam pad substrate 1 described in step A) and this step is 2 mm. The heating plate 4 described in this embodiment is a heating plate made of a polyimide electric heating plate. The heating plate made of the polyimide electric heating plate is a heating plate with a polyimide film as an outer insulator and a nickel-chromium alloy etching heating plate as an inner conductive heating element, and the outer insulator and the inner conductive heating element are tightly heat-sealed at high temperature and high pressure to form an integrated structure. C) Compounding, the PVC foam pad substrate 1 with a thickness of 2 mm described in step A) and step B) is passed through the substrate heating channel 41 between a pair of heating plates 4 in a heated state and at a heating temperature of 180°C in an unwinding manner, and the TPU film 21 withdrawn from the TPU film coil 2 is compounded to the substrate heating channel 41 to obtain the surface of the double-sided heated PVC foam pad substrate 1 with a heating temperature of 180°C. At the same time, the PVC color-printed film 31 withdrawn from the PVC color-printed film coil 3 is compounded to the outer side of the PTU film 21, so that the two side surfaces of the PVC foam pad substrate 1 are compounded with the TPU film 21 and the PVC color-printed film 31 in sequence from the inside to the outside. The printed film 31 is moved downward and passed through a pair of cooling pattern rollers 5 to obtain a cooling temperature of 10°C. The cooling method of the cooling pattern roller 5 is a circulating cooling method (through a circulating pump and a cooling medium introduction and outlet pipeline) connected to a cooling medium supply mechanism at both ends. The cooling medium of this embodiment is oil. A pair of cooling pattern rollers 5 are passed through and a winding roller located in front of the pair of cooling pattern rollers 5 and driven by power is pulled and collected (wound up) in a traction manner. That is to say, when the winding roller is pulled in a traction manner, the TPU film 21 and the PVC color printed film 31 are simultaneously compounded on both sides of the PVC foam pad substrate 1 to obtain a PVC foam pad material. In this embodiment, the aforementioned TPU The speed of the film coil 2 and the TPU film 21 and the PVC color-printed film 31 respectively withdrawn (unwound) from the PVC color-printed film coil 3 is equal to the moving speed of the PVC foam pad substrate 1, and the speeds of the three are all 1m / min. The aforementioned PVC foam pad substrate 1 does not contact the pair of heating plates 4 when passing through the area of ​​the aforementioned substrate heating channel 41, and the two side surfaces are respectively kept at a distance of 0.5mm from the pair of heating plates 4. The thickness of the TPU film 21 is 0.02mm, and the thickness of the aforementioned PVC color-printed film 31 is 0.1mm. In this step, the aforementioned TPU film 21 is composed of the following raw materials in proportion by weight: polyethylene adipate glycol di 60 parts of alcohol, 20 parts of a mixed pressure-sensitive adhesive in which a synthetic rubber pressure-sensitive adhesive and a natural rubber pressure-sensitive adhesive are mixed at a weight ratio of 0.5:1.5, 20 parts of a diisocyanate mixture in which hexamethylene diisocyanate and xylylene diisocyanate are mixed at a weight ratio of 1:2, 15 parts of a blended and modified 1,2-syndiotactic polyethylene polymer having a melt index of 25-30 / 10min under the measurement conditions of 190°C and 2.16kg of a high-fluidity polyester TPU, 10 parts of a rosin resin, 0.5 parts of carbon black having an average particle size of 20-50nm, 1 part of dibutyl phthalate (DBP), 0.01 parts of dioctyl tin oxide, 1.2 parts of 2-methylimidazole and 1.5 parts of antioxidant 1098. The rest are the same as the description of Example 1. Example 3

[0021] A) preparing composite materials, using 55% by mass concentration of isopropyl alcohol to clean the PVC foam pad substrate 1 with a width of 150 cm, which is prepared by the PVC foam pad material manufacturer according to the existing technology and has a flat and uniform surface without cracks, pits and / or hollows on the surface, in order to remove oil, wax and / or dust on both sides of the surface of the PVC foam pad substrate 1, and then sending it to Figure 1 The workstation where the equipment shown is located is equipped with a TPU film coil 2 having the same width as the PVC foam pad substrate 1, i.e., a width of 150 cm and each wound on a core tube and in a roll shape, and a PVC color printing film coil 3 obtained from a commercial channel, on the frame of the composite workstation to obtain a composite material; B) Preparation before compounding, at the compounding station and on the left side of the PVC foam pad substrate 1 corresponding to step A), set Figure 1 The TPU film roll left unwinding roller 6a on the frame not shown in the figure is used as a carrier to set the TPU film coil 2, and on the right side of the PVC foam pad substrate 1 and at a position corresponding to the left unwinding roller 6a of the TPU film roll, the right unwinding roller 6b of the TPU film roll set on the frame is used as a carrier to set the TPU film coil 2, and at a position corresponding to the lower side of the left unwinding roller 6a of the TPU film roll, the left unwinding roller 7a of the PVC color-printed film roll set on the frame is used as a carrier to set the PVC color-printed film coil 3, and at a position corresponding to the lower side of the right unwinding roller 6b of the TPU film roll, the right unwinding roller 7b of the PVC color-printed film roll set on the frame is used as a carrier to set the PVC color-printed film coil 3, When the foam pad substrate 1 moves downward, it passes through the area between the TPU film coil 2 located on the left and right unwinding rollers 6a and 6b of the TPU film roll. A pair of heating plates 4 (electric heating plates) are arranged on the frame as a carrier, which are both corresponding to each other (also called "parallel") and have a width equal to the width of the PVC foam pad substrate 1 and a height of one quarter of the width of the PVC foam pad substrate 1 (i.e. 37.5 cm) between the two sides for the PVC foam pad substrate 1 to pass through. The space between the pair of heating plates 4 constitutes a substrate heating channel 41. Below the pair of heating plates 4, a cooling pattern roller 5 driven by a power mechanism is arranged with a length corresponding to the width of the PVC foam pad substrate 1 using the aforementioned frame as a carrier. According to professional common sense, Figure 1The left and right rolls of TPU film coil 2 and PVC color printing film coil 3 in the position state shown are respectively placed on the left and right unwinding rollers 6a, 6b of the TPU film roll and the left and right unwinding rollers 7a, 7b of the PVC color printing film roll through their respective core tubes. The cooling pattern roller 5 refers to a roller body having a desired pattern on its surface, so that the cooling pattern roller 5 forms a pattern on the surface of the final PVC foam pad material, and the PVC foam pad material with different patterns formed on the surface can be obtained by replacing the cooling pattern roller 5 with different patterns. The thickness of the PVC foam pad substrate 1 described in step A) and this step is 20 mm. The heating plate 4 described in this embodiment is a heating plate made of a silicone heating plate, and the heating plate made of the silicone heating plate is a heating plate composed of silicone rubber and glass fiber cloth woven from nickel-chromium alloy wires wound on glass fiber wires. C) Compounding, the PVC foam pad substrate 1 with a thickness of 20 mm described in step A) and step B) is passed through the substrate heating channel 41 between a pair of heating plates 4 in a heated state and at a heating temperature of 250°C in an unwinding manner, and the TPU film 21 withdrawn from the TPU film coil 2 is compounded to the substrate heating channel 41 to obtain the surface of the double-sided heated PVC foam pad substrate 1 with a heating temperature of 250°C. At the same time, the PVC color-printed film 31 withdrawn from the PVC color-printed film coil 3 is compounded to the outer side of the PTU film 21, so that the two side surfaces of the PVC foam pad substrate 1 are compounded with the TPU film 21 and the PVD film 21 in sequence from the inside to the outside. The C color printing film 31 is moved downward and passed through a pair of cooling pattern rollers 5 to obtain a cooling temperature of 5°C. The cooling method of the cooling pattern roller 5 is a circulating cooling method (through a circulating pump and a cooling medium introduction and outlet pipeline) connected to a cooling medium supply mechanism at both ends. The cooling medium of this embodiment is ethanol. The pair of cooling pattern rollers 5 are passed through and the winding roller located in front of the pair of cooling pattern rollers 5 and driven by power is pulled and collected (wound up) in a traction manner. That is to say, when the winding roller is pulled and collected in a traction manner, the TPU film 21 and the PVC color printing film 31 are simultaneously compounded on both sides of the PVC foam pad substrate 1 to obtain the PVC foam pad material. In this embodiment, the aforementioned TPU film 21 and the PVC color printing film 31 are compounded on both sides of the PVC foam pad substrate 1 to obtain the PVC foam pad material. The speeds of the PU film coil 2 and the TPU film 21 and the PVC color-printed film 31 respectively withdrawn (unwound) from the PVC color-printed film coil 3 are equal to the moving speed of the PVC foam pad substrate 1, and the speeds of the three are all 10m / min. The aforementioned PVC foam pad substrate 1 does not contact the pair of heating plates 4 when passing through the area of ​​the aforementioned substrate heating channel 41, and the two sides are respectively kept at a distance of 10mm from the pair of heating plates 4. The thickness of the TPU film 21 is 0.03mm, and the thickness of the aforementioned PVC color-printed film 31 is 0.05mm. In this step, the aforementioned TPU film 21 is composed of the following raw materials in proportion by weight: poly (butylene adipate); 50 parts of alcohol ester diol, 17 parts of mixed pressure-sensitive adhesive in which synthetic rubber pressure-sensitive adhesive and natural rubber pressure-sensitive adhesive are mixed at a weight ratio of 0.5:1.5, 15 parts of diisocyanate mixture in which hexamethylene diisocyanate and xylylene diisocyanate are mixed at a weight ratio of 1:2, 20 parts of blended and modified 1,2-syndiotactic polyethylene polymer with a melt index of 25-30 / 10min under the measurement conditions of 190°C and 2.16kg of high-fluidity polyester TPU, 5 parts of rosin resin, 0.7 parts of carbon black with an average particle size of 20-50nm, 0.5 parts of dioctyl terephthalate, 0.03 parts of dibutyltin dilaurate, 1 part of 2-propylimidazole and 2 parts of antioxidant 1076. The rest are the same as the description of Example 1.

[0022] In summary, the technical solution provided by the present invention makes up for the shortcomings of the existing technology, successfully completes the invention task, and faithfully realizes the technical effects stated by the applicant in the technical effect column above.

Claims

1. A method for processing a PVC foam pad material, characterized in that: The following steps are involved: A) preparing a composite material, using a cleaning agent to clean a PVC foam pad substrate (1) with no cracks and / or hollowing defects on the surface, which is purchased from a commercial channel or prepared independently in a previous process, to remove oil, wax and / or dust on the surface, and then sending the cleaned PVC pad substrate to a composite station, where a TPU film roll (2) and a PVC color printing film roll (3) having the same width as the PVC foam pad substrate (1) and in a roll form are prepared to obtain a composite material; B) Preparation before lamination: at the lamination station and on the left side of the PVC foam pad substrate (1) corresponding to step A), the TPU film coil (2) is arranged with the left unwinding roller (6a) of the TPU film roll as a carrier, and on the right side of the PVC foam pad substrate (1) and at a position corresponding to the left unwinding roller (6a) of the TPU film roll, the TPU film coil (2) is also arranged with the right unwinding roller (6b) of the TPU film roll as a carrier, and at a position corresponding to the lower side of the left unwinding roller (6a) of the TPU film roll, the PVC color-printed film coil (3) is arranged with the left unwinding roller (7a) of the PVC color-printed film roll as a carrier, and at a position corresponding to the lower side of the right unwinding roller (6b) of the TPU film roll, the right unwinding roller (7b) of the PVC color-printed film roll is used as a carrier. The PVC color-printed film coil (3) is also provided. When the PVC foam pad substrate (1) moves downward, a pair of heating plates (4) are provided in the area between the TPU film coil (2) respectively located on the left and right unwinding rollers (6a, 6b) of the TPU film roll, which are corresponding to each other on the left and right sides and have a space between the opposite sides for the PVC foam pad substrate (1) to pass through. The heating plates (4) have a width equal to the width of the PVC foam pad substrate (1) and a height of one third, one fourth or one fifth of the width of the PVC foam pad substrate (1). The space between the pair of heating plates (4) constitutes a substrate heating channel (41). A cooling pattern roller (5) having a length corresponding to the width of the PVC foam pad substrate (1) is provided below the pair of heating plates (4); C) compounding, so that the PVC foam pad substrate (1) described in step A) and step B) passes through the substrate heating channel (41) between the pair of heating plates (4) in a heated state, moves downward out of the substrate heating channel (41) and the TPU film (21) withdrawn from the TPU film coil (2) is compounded to the substrate heating channel (41) to obtain a double-sided heated surface of the PVC foam pad substrate (1). At the same time, the PVC color-printed film (31) withdrawn from the PVC color-printed film coil (3) is compounded to the outer side of the TPU film (21), so that the PVC foam pad substrate (1) after the TPU film (21) and the PVC color-printed film (31) are compounded on both side surfaces of the PVC foam pad substrate (1) from the inside to the outside in sequence moves downward and is cooled when passing between the pair of cooling pattern rollers (5), exits the pair of cooling pattern rollers (5) and is pulled and rolled up to obtain a PVC foam pad material.

2. The method for processing a PVC foam pad material according to claim 1, characterized in that: The cleaning agent in step A) is sodium borate peroxide monohydrate or isopropyl alcohol with a mass percentage concentration of 45-55%; the sodium borate peroxide monohydrate is monohydrate, tetrahydrate or trihydrate.

3. The method for processing a PVC foam pad material according to claim 1, characterized in that: The cooling temperature of the cooling pattern roller (5) in step B) and step C) is 5-10°C, and the cooling method of the cooling pattern roller (5) is circulating cooling with both ends connected to a cooling medium supply mechanism; the cooling medium is water, oil, diphenyl ether or ethanol.

4. The method for processing a PVC foam pad material according to claim 1, characterized in that: The width of the PVC foam pad substrate (1) in steps A), B) and C) is 150 cm, 180 cm or 200 cm, and the thickness of the PVC foam pad substrate (1) is 2-20 mm.

5. The method for processing a PVC foam pad material according to claim 1, characterized in that: The heating temperature of the heating plate (4) in steps B) and C) is 180-250°C.

6. The method for processing a PVC foam pad material according to claim 5, characterized in that: The heating plate 4 is a heating plate made of a polyimide heating plate or a silicone heating plate; the heating plate made of the polyimide heating plate is a heating plate with a polyesterimide film as an outer insulator and a nickel-chromium alloy etched heating plate as an inner conductive heating element, and the outer insulator and the inner conductive heating element are tightly heat-sealed under high temperature and high pressure to form an integrated structure; the heating plate made of the silicone heating plate is a heating plate composed of a composite of silicone rubber and a glass fiber cloth woven from nickel alloy wires wound on glass fiber wires.

7. The method for processing a PVC foam pad material according to claim 1, characterized in that: The exit speed of the TPU film (21) exiting from the TPU film coil (2) and the exit speed of the PVC color-printed film (31) exiting from the PVC color-printed film coil (3) described in step C) are the same as the speed at which the PVC foam pad substrate (1) is conveyed to the substrate heating channel (41). When the PVC foam pad substrate (1) passes through the area of ​​the substrate heating channel (41), it does not contact the pair of heating plates (4), and a distance of 0.5-10 mm is maintained between the two side surfaces and the pair of heating plates (4).

8. The method for processing a PVC foam pad material according to claim 7, characterized in that: The speed at which the PVC foam pad substrate (1) is conveyed to the substrate heating channel (41), the withdrawal speed of the TPU adhesive film (21), and the withdrawal speed of the PVC color-printed film (31) are all 1-10 m / min.

9. A method for processing a PVC foam pad material according to claim 1, 7 or 8, characterized in that: The thickness of the TPU film (21) is 0.015-0.03 mm; the thickness of the PVC color printing film (31) is 0.05-0.15 mm.

10. The method for processing a PVC foam pad material according to claim 9, characterized in that: The TPU adhesive film (21) is composed of the following raw materials in proportion by weight: 40-60 parts of polyester polyol, 15-20 parts of pressure-sensitive adhesive, 15-20 parts of a diisocyanate mixture of hexamethylene diisocyanate and xylene diisocyanate in a weight ratio of 1:2, 10-20 parts of a modified thermoplastic elastomer, 5-10 parts of rosin resin, 0.5-1 part of carbon black with an average particle size of 20-50 nm, 1-1.5 parts of a plasticizer, 0.01-0.03 parts of an organic tin catalyst, 0.6-1.2 parts of an imidazole accelerator, and 1.5-2 parts of an antioxidant; the polyester polyol is polycaprolactone diol, polybutylene adipate diol, or polyethylene adipate diol; the pressure-sensitive adhesive is synthetic rubber A mixed pressure-sensitive adhesive in which a pressure-sensitive adhesive and a natural rubber pressure-sensitive adhesive are mixed in a mass ratio of 0.5:1.5; the modified thermoplastic elastomer is a blended modified 1,2-syndiotactic polyethylene polymer of a high-fluidity polyester TPU having a melt index of 25-30 / 10min under the measuring conditions of 190°C and 2.16kg; the plasticizer is dioctyl phthalate, dibutyl phthalate or dioctyl terephthalate; the organic tin catalyst is dibutyl tin dilaurate, dibutyl tin dilaurate or dioctyl oxide; the imidazole accelerator is 2-methylimidazole, 2-isopropylimidazole or 2-propylimidazole; the antioxidant is antioxidant 1098, antioxidant 1010 or antioxidant 1076.

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