Low-odor automotive trim composite material, preparation method and odor removal device

Abstract

The invention discloses a low-odor automotive trim composite material, a preparation method and an odor removal device, the composite material comprises a substrate and a leather outer layer compounded on the surface of the substrate, the substrate is prepared from a low-odor resin composition, and the leather outer layer is sequentially provided with a leather layer, a sponge layer and a base fabric from outside to inside. The low-odor resin composition comprises the following components in parts by weight: 95-100 parts of hydrogenated polypropylene; 1-1.5 parts of a molecular sieve; 0.2 to 0.5 part of an antioxidant; 2 to 5 parts of maleic anhydride grafted polypropylene; 0.2 to 0.5 part of high molecular weight silicone; and 0.5 to 0.8 part of nano zinc oxide. Through a quadruple deodorization mechanism, generation of source volatile matters is reduced, oxidation chain scission is inhibited in the process, residues are adsorbed and captured at the tail end, free groups are coated and neutralized, and compared with traditional active carbon passive adsorption, the deodorization efficiency is improved by three times or above and is maintained for a long time.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of low-odor composite materials, and particularly relates to a low-odor automotive interior composite material, a preparation method and a deodorization device. BACKGROUND

[0002] Composite materials have excellent performance and are widely used in different industries, such as aerospace, automobile manufacturing, construction, electronics, decoration and the like. However, a large product odor has been a problem to be solved. The large odor not only affects the sensory quality of the product, but also may potentially threaten the health of consumers.

[0003] Therefore, a low-odor automotive interior composite material, a preparation method and a deodorization device are urgently needed. SUMMARY

[0004] To solve the defects in the prior art, the application provides a low-odor automotive interior composite material, a preparation method and a deodorization device.

[0005] To solve the above technical problems, the application provides the following technical solutions:

[0006] The first object of the application provides a low-odor automotive interior composite material, which comprises a substrate and a leather outer layer combined on the surface of the substrate, wherein the substrate is prepared from a low-odor resin composition, and the leather outer layer is sequentially provided with a leather layer, a sponge layer and a base cloth from outside to inside.

[0007] Preferably, the low-odor resin composition comprises the following components by weight:

[0008] Hydrogenated polypropylene 95-100 parts;

[0009] Molecular sieve 1-1.5 parts;

[0010] Antioxidant 0.2-0.5 parts;

[0011] Maleic anhydride grafted polypropylene 2-5 parts;

[0012] High molecular weight silicone 0.2-0.5 parts;

[0013] Nano zinc oxide 0.5-0.8 parts.

[0014] Preferably, the molecular sieve is a modified zeolite molecular sieve with a pore size of 0.5-0.8 nm; the antioxidant is at least one of antioxidant 1076 and antioxidant 168; the grafting rate of the maleic anhydride grafted polypropylene is 0.8%; the molecular weight of the high molecular weight silicone is >500000, and the nano zinc oxide is subjected to hydrophobic surface treatment.

[0015] The second object of the present application provides a preparation method of low odor automobile interior composite material, comprising the following steps:

[0016] S1, drying hydrogenated polypropylene at 85±5℃ to water content≤0.02%, activating molecular sieve at 220±5℃ for 2 hours, and ball-milling and dispersing nano-zinc oxide to particle size≤100nm and hydrophobic surface treatment;

[0017] S2, putting hydrogenated polypropylene, antioxidant and high molecular weight silicone treated in step S1 into a mixer for mixing, then transferring to the main feeding port of a double screw extruder; then, adding maleic anhydride grafted polypropylene, molecular sieve and nano-zinc oxide from the side feeding port, and melting and extruding at 210-230℃;

[0018] S3, water-cooling and pelletizing the extruded strip, vacuum drying at 100±5℃, and then preparing into the base of automobile interior in an injection mold;

[0019] S4, compounding the leather layer, sponge layer and base cloth to form a leather outer layer on the outer surface of the base.

[0020] Preferably, in step S2, the vacuum devolatilization pressure of the double screw during extrusion is-0.09±0.01MPa.

[0021] Preferably, in step S3, the vacuum drying adopts gradient temperature control, the first stage is 95±2℃×4h, and the second stage is 105±2℃×2h.

[0022] Preferably, in step S4, the leather layer, sponge layer and base cloth are compounded by glue or flame, and then the leather outer layer is prepared after water washing and odor removal.

[0023] The third object of the present application provides a deodorization device for preparing low odor automobile interior composite material, comprising a cooling mechanism and a baking mechanism, the cooling mechanism comprises a cooling circulation cooling unit, an industrial cold water device, a compressor, a condenser, a shell and tube evaporator, a cold water console, a cold air console and an auxiliary air cooling device, the cooling circulation cooling unit comprises a cooling roller, the input end and the output end of the cooling roller are connected with the industrial cold water device through metal hoses for the circulation use of cold water and hot water, the surface of the cooling roller is pasted with Teflon, the industrial cold water device is connected with the shell and tube evaporator through a pipeline, the shell and tube evaporator is connected with the condenser through a pipeline, the condenser is connected with the compressor through a pipeline; the auxiliary air cooling device is connected with the cooling room through an air pipe; the cold water console is connected with the industrial cold water device and the compressor through a control line, and the cold air console is connected with the auxiliary air cooling device through a control line; an infrared thermometer is installed in the cooling circulation cooling unit, and the infrared thermometer is connected with the cold water console through a line; the baking mechanism comprises a baking unit and a water washing unit, and the water washing unit is arranged at the rear end of the baking unit.

[0024] Preferably, the water washing unit comprises a water supply tank and a water washing device, the input end of the water supply tank is connected with the distilled water outlet pipeline through a water tank water inlet pipe, the output end of the water supply tank is connected with a water tank drain pipe, the water washing device comprises a mounting frame, a water washing pool, a water immersion assembly, and a water squeezing assembly, the water washing pool is arranged on the mounting frame, at least one side wall of the water washing pool is connected with a water washing water inlet pipe and an overflow pipe, the water washing water inlet pipe is connected with the water tank drain pipe and water supply conveying is conducted through a conveying pump, the bottom of the water washing pool is provided with a water washing drain pipe, the water washing drain pipe is connected with a sewage pipeline, a float valve is arranged in the water washing pool; the water washing pool is divided into two water washing tanks through an intermediate partition plate, the height of the intermediate partition plate is lower than the height of the pipe orifice of the overflow pipe, a lower support plate is arranged in the water washing tank, the water immersion assembly is arranged on the lower support plate, and the water squeezing assembly is arranged on the mounting frame and above the water immersion assembly.

[0025] Preferably, the water immersion assembly comprises a support vertical plate and a water immersion roller, the water immersion roller is rotatably arranged on two support vertical plates through rotating sleeve pipes at both ends in the axial direction of the water immersion roller, an intermediate water immersion area is formed in the water immersion roller, and a hollow groove is formed in the surface of the water immersion roller, so that the intermediate water immersion area is connected with the water washing pool; a rotating tooth ring is fixed on the rotating sleeve pipe at the rear end, a first gear is arranged on the inner side of the support vertical plate, a second gear and a third gear are arranged on the outer side of the support vertical plate, the first gear is connected with the rotating tooth ring in external meshing, the third gear is connected with the second gear in external meshing, the second gear is coaxially connected with the first gear, the number of teeth of the first gear is more than the number of teeth of the rotating tooth ring and the number of teeth of the second gear, and the number of teeth of the third gear is more than the number of teeth of the second gear; an intermediate driving shaft is arranged in the water immersion roller, the axial front end of the intermediate driving shaft is connected with the support vertical plate through a bearing, the axial rear end of the intermediate driving shaft passes through the rotating sleeve pipe and is in transmission connection with the third gear, and stirring leaves are arranged on the outer surface of the intermediate driving shaft.

[0026] The water squeezing assembly comprises two L-shaped support plates, a first rotating member, a second rotating member, a first water squeezing roller set and a second water squeezing roller set, the two axial ends of the second water squeezing roller set are respectively arranged on the two L-shaped support plates through the second rotating member, the two axial ends of the first water squeezing roller set are respectively arranged on the first rotating member, the first rotating member is arranged on the vertical sliding assembly, and the vertical sliding assembly is arranged on the two L-shaped support plates; the vertical sliding assembly comprises a limiting vertical rod, a vertical sliding block, a side fixing plate and fixing bolts, vertical sliding grooves are formed in the two L-shaped support plates, the limiting vertical rod is vertically arranged on the inner sides of the vertical sliding grooves, the side fixing plate is arranged on the outer side surfaces of the two L-shaped support plates and located on the two sides of the vertical sliding grooves, the vertical sliding block is slidingly arranged on the limiting vertical rod and fixedly connected with the side fixing plate through the fixing bolts at the two ends, and the first rotating member is arranged on the vertical sliding block and located above the second rotating member; adjusting grooves are formed in the axial end faces of the first rotating member and the second rotating member and arranged in the circumferential direction, a middle sliding rod is fixedly arranged in the adjusting grooves, an action block is slidingly arranged on the middle sliding rod, a pressure spring is sleeved on the middle sliding rod and located between the action block and the radial inner side surface of the adjusting groove, the two axial ends of the water squeezing rollers of the first water squeezing roller set are connected with the action blocks on the first rotating member, and the two axial ends of the water squeezing rollers of the second water squeezing roller set are connected with the action blocks on the second rotating member.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] The base of the present application constructs a "adsorption-catalytic degradation" double active center through modified zeolite molecular sieve and hydrophobic nano zinc oxide, forms a closed loop of substance conversion, and selectively captures small polar molecules through specific pore zeolite, and the surface acid sites accelerate the decomposition of nitrogen-containing compounds; the hydrophobic layer of zinc oxide hinders the competitive adsorption of water molecules, and synchronously catalyzes the oxidation of sulfur-containing substances to generate stable sulfate, which breaks through the saturation bottleneck of physical adsorption, realizes the chemical conversion of odor substances, and avoids secondary pollution in the regeneration process; the hindered phenolic antioxidant and the phosphite auxiliary agent form a composite stable system to inhibit the thermal oxidative degradation reaction and block the generation path of aldehyde ketone odor precursors; the anhydride groups in the grafted polypropylene molecular chain actively bond with free amine / aldehyde, and a closed network is constructed through intermolecular forces to block the odor diffusion channel; the high molecular weight silicone optimizes the melt flowability, reduces the friction heat and avoids local pyrolysis; the dynamic synergistic system realizes a four-fold odor removal mechanism, reduces the generation of volatile substances at the source, inhibits oxidative chain scission in the process, captures residual substances at the end, neutralizes free radicals, and has a 3-fold odor removal efficiency compared with traditional activated carbon passive adsorption and long-term maintenance.

[0029] In the application, the high-temperature activation of the molecular sieve widens the pore structure without destroying the crystalline phase, the nanometer particle ball milling dispersion breaks the Van der Waals force constraint without causing mechanical thermal degradation, the main / auxiliary material partition feeding design in the mixing stage isolates the heat-sensitive components, the antioxidants and silicones are premixed at low temperature in the main area to inhibit the oxidation side reaction, the zeolite and the grafting material are fed through the side feeding port to avoid the high shear melting section, the stability of the molecular sieve skeleton above 220 DEG C and the activity of the anhydride group are ensured, the vacuum stepwise devolatilization is coupled with the reverse kneading block flow field, the small molecule volatile substances are oriented to migrate along the screw slot under negative pressure, and the local overheating area is reduced by 85% compared with the conventional extrusion, and the by-products such as hexanal generated by thermal degradation are reduced from the source.

[0030] The application can significantly remove residual odor and harmful gas in the outer layer of leather through the washing device and the efficient cooling system, so that the product is more environmentally friendly and safe. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 It is a whole structure diagram of the cooling room of the application;

[0032] Figure 2 It is a whole structure diagram of the washing unit of the application from the front view;

[0033] Figure 3 It is a whole structure diagram of the washing unit of the application from the lower view;

[0034] Figure 4 It is a top view of the washing unit of the application;

[0035] Figure 5 It is a front view of the washing unit of the application;

[0036] Figure 6 It is a sectional view of the washing device of the application;

[0037] Figure 7 It is a structure diagram of the water immersion assembly of the application;

[0038] Figure 8 It is a structure diagram of the water squeezing assembly after the removal of the action block and the water squeezing roller;

[0039] Figure 9 It is a structure diagram of the action block and the water squeezing roller.

[0040] In the figure: 1, cooling circulating cooling unit; 11, cooling roller; 12, metal hose; 2, industrial cold water device; 21, compressor; 22, condenser; 23, shell and tube evaporator; 3, infrared thermometer; 41, cold water control console; 42, cold air control console; 5, auxiliary air cooling device; 6, baking and washing unit; 61, washing device; 611, mounting frame; 612, washing pool; 61201, washing inlet pipe; 61202, floating ball valve; 61203, intermediate partition plate; 61204, washing tank; 61205, lower support plate; 61206, overflow pipe; 61207, washing drain pipe; 613, soaking assembly; 61301, support vertical plate; 61302, rotating sleeve; 61303, soaking roller; 61304, intermediate soaking area; 61305, hollow groove; 61306, rotating tooth ring; 61307, first gear; 61308, second gear; 61309, third gear; 61310, intermediate drive shaft; 61311, stirring blade; 614, conveying roller; 615, wringing assembly; 61501, L-shaped support plate; 61502, first rotating part; 61503, second rotating part; 61504, vertical sliding groove; 61505, limiting vertical rod; 61506, vertical sliding block; 61507, side fixed plate; 61508, fixed bolt; 61509, adjusting slot; 61510, intermediate sliding rod; 61511, action block; 61512, wringing roller; 61513, pressure spring; 62, water supply tank; 621, water tank inlet pipe; 622, water tank drain pipe; 63, conveying pump. DETAILED DESCRIPTION

[0041] The preferred embodiments of the present application will be described herein below with reference to the drawings, in which it is to be understood that the preferred embodiments described herein are illustrative of the present application and are not intended to limit the present application. It is to be understood that the terminology used herein is for the purpose of describing the present application and is not intended to be limiting.

[0042] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "front", "back", "left", "right", etc. are based on the orientation or positional relationship shown in the drawings of the specification, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices or elements indicated to have a specific orientation, to be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0043] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0044] Example 1

[0045] The embodiment provides a low-odor automobile interior composite material, which comprises a substrate and a leather outer layer compounded on the surface of the substrate, wherein the substrate is prepared from a low-odor resin composition, and the leather outer layer is sequentially provided with a leather layer, a sponge layer and a base cloth from outside to inside.

[0046] The low-odor resin composition comprises the following components in parts by weight: 95 parts of hydrogenated polypropylene, 1.5 parts of molecular sieve, 0.5 parts of antioxidant, 2 parts of maleic anhydride grafted polypropylene, 0.5 parts of high molecular weight silicone and 0.5 parts of nano zinc oxide. The molecular sieve is a modified zeolite molecular sieve with a pore size of 0.5 nm; the antioxidant is antioxidant 1076 and antioxidant 168; the grafting rate of the maleic anhydride grafted polypropylene is 0.8%; the molecular weight of the high molecular weight silicone is greater than 500,000; and the nano zinc oxide is subjected to hydrophobic surface treatment.

[0047] The embodiment further provides a preparation method of the low-odor automobile interior composite material, which comprises the following steps.

[0048] S1, drying hydrogenated polypropylene at 85 DEG C to a water content of less than or equal to 0.02%, activating molecular sieve at 220 DEG C for 2 hours, and ball-milling and dispersing nano zinc oxide to a particle size of less than or equal to 100 nm and subjecting the nano zinc oxide to hydrophobic surface treatment;

[0049] S2, after the hydrogenated polypropylene, the antioxidant and the high molecular weight silicone treated in step S1 are mixed in a mixer, the mixture is transferred to a main feeding port of a double-screw extruder; then, the maleic anhydride grafted polypropylene, the molecular sieve and the nano zinc oxide are added from a side feeding port and are melt-extruded at 210 DEG C; and the vacuum devolatilization pressure of the double-screw extruder is -0.09 MPa during the extrusion.

[0050] S3, water-cooling and pelletizing the extruded strip, vacuum drying the pellets at 100 DEG C ± 5 DEG C, and then preparing a substrate of an automobile interior in an injection mold; the vacuum drying is performed by gradient temperature control, i.e., 95 DEG C for 4 hours in the first stage and 105 DEG C for 2 hours in the second stage.

[0051] S4, compounding a leather layer, a sponge layer and a base cloth to form a leather outer layer, and compounding the leather outer layer on the outer surface of the substrate.

[0052] Embodiment 2

[0053] The rest is the same as in embodiment 1, except that the low-odor resin composition comprises the following components in parts by weight: 100 parts of hydrogenated polypropylene, 1 part of molecular sieve, 0.2 parts of antioxidant, 2 parts of maleic anhydride grafted polypropylene, 0.2 parts of high molecular weight silicone and 0.5 parts of nano zinc oxide. The molecular sieve is a modified zeolite molecular sieve with a pore size of 0.8 nm.

[0054] The embodiment further provides a preparation method of the low-odor automobile interior composite material, which comprises the following steps:

[0055] S1, dry hydrogenated polypropylene at 90℃ to a moisture content of ≤0.02%, activate the molecular sieve at 225℃ for 2 hours, ball mill and disperse the nano zinc oxide to a particle size of ≤100nm and hydrophobic surface treatment;

[0056] S2, after the hydrogenated polypropylene treated in step S1, antioxidant, high molecular weight silicone are put into the mixer and mixed, then transferred to the main feeding port of the twin screw extruder; then, maleic anhydride grafted polypropylene, molecular sieve, nano zinc oxide are added from the side feeding port, and melt extruded at 230℃; the vacuum devolatilization pressure of the twin screw during extrusion is-0.1MPa.

[0057] S3, water-cooled pelletizing of the extruded strip, vacuum drying at 105℃, then preparing the base of the automotive interior in the injection mold; the vacuum drying adopts gradient temperature control, the first stage is 97℃×4h, and the second stage is 107℃×2h.

[0058] S4, the leather layer, the sponge layer and the base cloth are compounded to form a leather outer layer on the outer surface of the base.

[0059] Example 3

[0060] The rest is the same as example 1, except that the low odor resin composition comprises the following components by weight: hydrogenated polypropylene 97 parts; molecular sieve 1.2 parts; antioxidant 0.3 parts; maleic anhydride grafted polypropylene 3 parts; high molecular weight silicone 0.3 parts; nano zinc oxide 0.6 parts. The molecular sieve is modified zeolite molecular sieve, and the pore size is 0.6nm.

[0061] The present embodiment provides a preparation method of a low odor automotive interior composite material, comprising the following steps:

[0062] S1, dry hydrogenated polypropylene at 80℃ to a moisture content of ≤0.02%, activate the molecular sieve at 215℃ for 2 hours, ball mill and disperse the nano zinc oxide to a particle size of ≤100nm and hydrophobic surface treatment;

[0063] S2, after the hydrogenated polypropylene treated in step S1, antioxidant, high molecular weight silicone are put into the mixer and mixed, then transferred to the main feeding port of the twin screw extruder; then, maleic anhydride grafted polypropylene, molecular sieve, nano zinc oxide are added from the side feeding port, and melt extruded at 220℃; the vacuum devolatilization pressure of the twin screw during extrusion is-0.08MPa.

[0064] S3, water-cooled pelletizing of the extruded strip, vacuum drying at 95℃, then preparing the base of the automotive interior in the injection mold; the vacuum drying adopts gradient temperature control, the first stage is 93℃×4h, and the second stage is 103℃×2h.

[0065] S4, the leather layer, the sponge layer and the base cloth are compounded to form a leather outer layer on the outer surface of the base.

[0066] Embodiment 4

[0067] As Figures 1 to 9 shown, the embodiment provides a deodorization device for preparing a low odor automotive interior composite material, which comprises a cooling mechanism and a baking mechanism. The cooling mechanism comprises a cooling circulation cooling unit 1, an industrial cold water device 2, a compressor 21, a condenser 22, a shell and tube evaporator 23, a cold water control console 41, a cold air control console 42 and an auxiliary air cooling device 5. The cooling circulation cooling unit 1 comprises a cooling roller 11, the input end and the output end of which are connected with the industrial cold water device 2 through metal hoses 12 for the circulation use of cold water and hot water. The surface of the cooling roller 11 is coated with Teflon. The industrial cold water device 2 is connected with the shell and tube evaporator 23 through a pipeline, the shell and tube evaporator 23 is connected with the condenser 22 through a pipeline, and the condenser 22 is connected with the compressor 21 through a pipeline. The auxiliary air cooling device 5 is connected with a cooling room through an air pipe. The cold water control console 41 is connected with the industrial cold water device 2 and the compressor 21 through control lines, and the cold air control console 42 is connected with the auxiliary air cooling device 5 through control lines. An infrared temperature measuring instrument 3 is installed in the cooling circulation cooling unit 1, which is connected with the cold water control console 41 through a line. The baking mechanism comprises a baking unit and a water washing unit 6, which is arranged at the rear end of the baking unit.

[0068] In the embodiment, the water washing unit 6 comprises a water supply tank 62 and a water washing device 61. The input end of the water supply tank 62 is connected with a distilled water outlet pipeline through a water tank water inlet pipe 621, and the output end of the water supply tank 62 is connected with a water tank drainage pipe 622. The water washing device 61 comprises a mounting frame 611, a water washing pool 612, a water immersion assembly 613 and a water squeezing assembly 615. The water washing pool 612 is arranged on the mounting frame 611. At least one side wall of the water washing pool 612 is connected with a water washing water inlet pipe 61201 and an overflow pipe 61206. The water washing water inlet pipe 61201 is connected with the water tank drainage pipe 622 and water supply conveying is conducted through a conveying pump 63. The bottom of the water washing pool 612 is provided with a water washing drainage pipe 61207, which is connected with a sewage pipeline. A float valve 61202 is installed in the water washing pool 612. The water washing pool 612 is divided into two water washing tanks 61204 through an intermediate partition plate 61203. The height of the intermediate partition plate 61203 is lower than the height of the pipe orifice of the overflow pipe 61206. A lower support plate 61205 is arranged in the water washing tank 61204. The water immersion assembly 613 is arranged on the lower support plate 61205. The water squeezing assembly 615 is arranged on the mounting frame 611 and above the water immersion assembly 613.

[0069] In the embodiment, the soaking assembly 613 comprises support vertical plates 61301 and soaking rollers 61303, axial ends of the soaking rollers 61303 are rotatably arranged on the two support vertical plates 61301 through rotating sleeves 61302, an intermediate soaking area 61304 is formed inside the soaking rollers 61303, and hollow grooves 61305 are arranged on surfaces of the soaking rollers 61303, so that the intermediate soaking area 61304 is in communication with the washing pool 612; a rotating tooth ring 61306 is fixed on the rear rotating sleeve 61302, a first gear 61307 is arranged on an inner side of the support vertical plate 61301, a second gear 61308 and a third gear 61309 are arranged on an outer side of the support vertical plate 61301, the first gear 61307 is externally meshed and connected with the rotating tooth ring 61306, the third gear 61309 is externally meshed and connected with the second gear 61308, the second gear 61308 is coaxially connected with the first gear 61307, the first gear 61307 has more teeth than the rotating tooth ring 61306 and the second gear 61308, and the third gear 61309 has more teeth than the second gear 61308; a middle driving shaft 61310 is sleeved in the soaking roller 61303, an axial front end of the middle driving shaft 61310 is connected with the support vertical plate 61301 through a bearing, an axial rear end of the middle driving shaft 61310 is drivingly connected with the third gear 61309 after passing through the rotating sleeve 61302, and stirring leaves 61311 are arranged on an outer surface of the middle driving shaft 61310;

[0070] The squeezing assembly 615 comprises two L-shaped support plates 61501, a first rotating piece 61502, a second rotating piece 61503, a first squeezing roller set and a second squeezing roller set, the two ends of the second squeezing roller set in the axial direction are respectively arranged on the two L-shaped support plates 61501 through the second rotating piece 61503, the two ends of the first squeezing roller set in the axial direction are respectively arranged on the first rotating piece 61502, the first rotating piece 61502 is arranged on the vertical sliding assembly in a rotating manner, and the vertical sliding assembly is arranged on the two L-shaped support plates 61501; the vertical sliding assembly comprises a limiting vertical rod 61505, a vertical sliding block 61506, a side fixed plate 61507 and a fixed bolt 61508, the two L-shaped support plates 61501 are provided with vertical sliding grooves 61504, the limiting vertical rod 61505 is vertically arranged on the inside of the two sides of the vertical sliding groove 61504, the side fixed plate 61507 is arranged on the outer side surface of the two L-shaped support plates 61501 and located on the two sides of the vertical sliding groove 61504, the vertical sliding block 61506 is arranged on the limiting vertical rod 61505 in a sliding manner and the two ends thereof are fixedly connected with the side fixed plate 61507 through the fixed bolt 61508, and the first rotating piece 61502 is arranged on the vertical sliding block 61506 in a rotating manner and located above the second rotating piece 61503; the axial end surface of the first rotating piece 61502 and the second rotating piece 61503 is provided with an adjusting groove 61509 in the circumferential direction, the adjusting groove 61509 is fixedly provided with an intermediate sliding rod 61510, the intermediate sliding rod 61510 is slidably provided with an action block 61511, the intermediate sliding rod 61510 is sleeved with a pressure spring 61513 between the action block 61511 and the radial inner side surface of the adjusting groove 61509, the two ends of the squeezing roller 61512 of the first squeezing roller set in the axial direction are connected with the action block 61511 on the first rotating piece 61502, and the two ends of the squeezing roller 61512 of the second squeezing roller set in the axial direction are connected with the action block 61511 on the second rotating piece 61503.

[0071] The working principle of the embodiment will be further described below:

[0072] The infrared temperature detector detects the temperature of the cooling roller. When the temperature is higher than 30 DEG C, an alarm is given. The alarm signal is received by the cold water control console to control the compressor to work. The compressor sucks the low-temperature and low-pressure refrigerant gas after evaporation and refrigeration, and then compresses the high-temperature and high-pressure gas to send to the condenser. The high-pressure and high-temperature gas is cooled in the condenser to condense into normal-temperature and high-pressure liquid. When the normal-temperature and high-pressure liquid flows into the thermal expansion valve, it is throttled into low-temperature and low-pressure wet steam, which flows into the shell and tube evaporator. The industrial cold water device extracts hot water in the cooling roller into the shell and tube evaporator. The low-temperature and low-pressure wet steam absorbs the heat of the water in the shell and tube evaporator to reduce the temperature of the water. The water is sent to the cooling roller by the industrial cold water device to exchange heat with the product outside the cooling roller, so that the surface temperature of the product is reduced to the process requirement. The low-temperature and low-pressure wet steam is reflowed to the compressor as saturated gas. The auxiliary air cooling device cools the cooling room. According to the temperature in the cooling room, the cold air control console adjusts the refrigeration key and the air extraction key in the frequency converter to set the auxiliary air cooling device to reduce the temperature in the cooling room.

[0073] When the product is conveyed outside the water immersion roller, the water immersion roller is rotated, the rotating tooth ring outside the rotating sleeve is rotated, the intermediate drive shaft and the stirring blade are rotated through the meshing connection relationship between the rotating tooth ring and the first gear, the coaxial connection relationship between the first gear and the second gear, the meshing connection relationship between the second gear and the third gear, and the coaxial connection relationship between the third gear and the intermediate drive shaft, the water body inside the intermediate water immersion area is disturbed, and the inner and outer surfaces of the product are fully contacted with the water body.

[0074] By loosening the fixing bolt, the vertical sliding block slides along the vertical sliding groove and the limiting vertical rod, and the maximum height of the product passing between the first rotating part and the second rotating part is adjusted to the target height, and then the fixing bolt is used for fixing. The water squeezing roller contacts and squeezes the water in the product, and at the same time, the water squeezing roller contacts the product to drive the action block to slide along the adjusting slot and the intermediate sliding rod, so as to play a buffering role and ensure that the pressure on the product is maximized.

[0075] Finally, it should be noted that: the above only describes the preferred embodiments of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacements to some technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A low-odor automotive interior composite material, characterized in that: The leather outer layer comprises a base and a leather outer layer compounded on the surface of the base. The base is prepared from a low-odor resin composition. The leather outer layer is provided with a leather layer, a sponge layer and a base fabric in sequence from the outside to the inside.

2. The low-odor automotive interior composite material according to claim 1, characterized in that: The low-odor resin composition comprises the following components in parts by weight: 95-100 parts of hydrogenated polypropylene; 1-1.5 parts of molecular sieve; 0.2-0.5 parts of antioxidant; 2-5 parts of maleic anhydride grafted polypropylene; 0.2-0.5 parts of high molecular weight silicone; 0.5-0.8 parts of nano zinc oxide.

3. The low-odor automotive interior composite material according to claim 2, characterized in that: The molecular sieve is a modified zeolite molecular sieve with a pore size of 0.5-0.8 nm; the antioxidant is at least one of antioxidant 1076 and antioxidant 168; the grafting rate of the maleic anhydride grafted polypropylene is 0.8%; the molecular weight of the high molecular weight silicone is greater than 500,000, and the nano zinc oxide is subjected to a hydrophobic surface treatment.

4. A method for preparing the low-odor automotive interior composite material according to any one of claims 1 to 3, characterized in that: The following steps are involved: S1. Dry hydrogenated polypropylene at 85±5°C to a moisture content of ≤0.02%, activate molecular sieve at 220±5°C for 2 hours, ball-mill and disperse nano-zinc oxide to a particle size of ≤100 nm and perform hydrophobic surface treatment; S2. The hydrogenated polypropylene treated in step S1, the antioxidant, and the high molecular weight silicone are added to a mixer and mixed, and then transferred to the main feed port of a twin-screw extruder; then, maleic anhydride-grafted polypropylene, molecular sieve, and nano zinc oxide are added through a side feed port and melt-extruded at 210-230°C; S3, the extruded strips are water-cooled and pelletized, vacuum-dried at 100±5°C, and then prepared into a base for automotive interior decoration in an injection mold; S4, compounding the leather layer, the sponge layer and the base fabric to form a leather outer layer and compounding it on the outer surface of the base.

5. The method for preparing a low-odor automotive interior composite material according to claim 4, characterized in that: In step S2, the vacuum devolatilization pressure of the twin screw during extrusion is -0.09±0.01 MPa.

6. The method for preparing a low-odor automotive interior composite material according to claim 4, characterized in that: In step S3, vacuum drying adopts gradient temperature control, with the first stage at 95±2°C×4h and the second stage at 105±2°C×2h.

7. The method for preparing a low-odor automotive interior composite material according to claim 4, characterized in that: In step S4, the leather layer, the sponge layer and the base fabric are laminated by glue or flame, and then washed and deodorized to prepare a leather outer layer.

8. A deodorizing device for preparing the low-odor automotive interior composite material according to any one of claims 1 to 3, characterized in that: The invention comprises a cooling mechanism and a baking mechanism, wherein the cooling mechanism comprises a cooling circulation cooling unit (1), an industrial cold water device (2), a compressor (21), a condenser (22), a shell and tube evaporator (23), a cold water control console (41), a cold air control console (42) and an auxiliary air cooling device (5), wherein the cooling circulation cooling unit (1) comprises a cooling roller (11), wherein the input end and the output end of the cooling roller (11) are both connected to the industrial cold water device (2) through a metal hose (12) for circulating cold water and hot water, wherein the surface of the cooling roller (11) is pasted with Teflon, and the industrial cold water device (2) is connected to the shell and tube evaporator (23) through a pipeline, and the shell and tube evaporator ( 23) is connected to the condenser (22) through a pipeline, and the condenser (22) is connected to the compressor (21) through a pipeline; the auxiliary air cooling device (5) is connected to the cooling room through an air duct; the cold water control console (41) is connected to the industrial cold water device (2) and the compressor (21) through a control line, and the cold air control console (42) is connected to the auxiliary air cooling device (5) through a control line; an infrared thermometer (3) is installed in the cooling cycle cooling unit (1), and the infrared thermometer (3) is connected to the cold water control console (41) through a line; the baking mechanism includes a baking unit and a water washing unit (6), and the water washing unit (6) is arranged at the rear end of the baking unit.

9. The deodorizing device according to claim 8, characterized in that: The water washing unit (6) comprises a water supply tank (62) and a water washing device (61). The input end of the water supply tank (62) is connected to the distilled water outlet pipe via a water tank water inlet pipe (621). The output end of the water supply tank (62) is connected to a water tank drain pipe (622). The water washing device (61) comprises a mounting frame (611), a water washing tank (612), a water immersion component (613), and a water squeezing component (615). The water washing tank (612) is arranged on the mounting frame (611). A water washing inlet pipe (61201) and an overflow pipe (61206) are connected to at least one side wall of the water washing tank (612). The water washing inlet pipe (61201) is connected to the water tank drain pipe (622) and is fed through a delivery pump (63). Water supply and transportation, a water washing drain pipe (61207) is provided at the bottom of the water washing tank (612), the water washing drain pipe (61207) is connected to the sewage pipe, and a float valve (61202) is installed in the water washing tank (612); the water washing tank (612) is divided into two water washing troughs (61204) by a middle partition (61203), the height of the middle partition (61203) is lower than the height of the pipe mouth of the overflow pipe (61206), a lower support plate (61205) is provided in the water washing trough (61204), the immersion component (613) is provided on the lower support plate (61205), and the water squeezing component (615) is provided on the mounting frame (611) and is located above the immersion component (613).

10. The deodorizing device according to claim 9, characterized in that: The immersion assembly (613) comprises a supporting vertical plate (61301) and a immersion roller (61303). The axial ends of the immersion roller (61303) are rotatably arranged on the two supporting vertical plates (61301) via a rotating sleeve (61302). An intermediate immersion area (61304) is formed inside the immersion roller (61303). A hollow groove (61305) is provided on the surface of the immersion roller (61303), so that the intermediate immersion area (61304) is connected to the washing tank (612). A rotating gear ring (61306) is fixed to the rotating sleeve (61302) at the rear end. A first gear (61307) is provided on the inner side of the supporting vertical plate (61301). A second gear (61308) and a third gear (61309) are provided on the outer side of the supporting vertical plate (61301). The first gear (61307) and the rotating gear ring (61308) are connected to each other. The intermediate drive shaft (61310) is sleeved in the water-immersing roller (61303), the axial front end of the intermediate drive shaft (61310) is connected to the supporting vertical plate (61301) via a bearing, the axial rear end of the intermediate drive shaft (61310) passes through the rotating sleeve (61302) and is transmission-connected to the third gear (61309), and the outer surface of the intermediate drive shaft (61310) is provided with a stirring blade (61311); The water squeezing assembly (615) includes two L-shaped support plates (61501), a first rotating member (61502), a second rotating member (61503), a first water squeezing roller group and a second water squeezing roller group. The axial ends of the second water squeezing roller group are respectively rotatably arranged on the two L-shaped support plates (61501) through the second rotating member (61503). The axial ends of the first water squeezing roller group are respectively arranged on the first rotating member (61502). The first rotating member (61502) is rotatably arranged on the vertical sliding assembly. The vertical sliding assembly is arranged on the two L-shaped support plates (61501). 1501); the vertical sliding assembly includes a limiting rod (61505), a vertical sliding block (61506), a side fixing plate (61507), and a fixing bolt (61508); the two L-shaped support plates (61501) are provided with a vertical sliding groove (61504); the limiting rod (61505) is vertically arranged on both sides of the interior of the vertical sliding groove (61504); the side fixing plates (61507) are arranged on the outer surface of the two L-shaped support plates (61501) and are located on both sides of the vertical sliding groove (61504); the vertical sliding block ( 61506) is slidably arranged on the limiting vertical rod (61505) and its two ends are fixedly connected to the side fixing plate (61507) by fixing bolts (61508), the first rotating member (61502) is rotatably arranged on the vertical sliding block (61506) and is located above the second rotating member (61503); the axial end faces of the first rotating member (61502) and the second rotating member (61503) are provided with adjustment slots (61509) in an array along their circumferential direction, and an intermediate sliding rod (61510) is fixed in the adjustment slot (61509). An action block (61511) slides on the middle sliding rod (61510), and a pressure spring (61513) is sleeved on the middle sliding rod (61510) and located between the action block (61511) and the radial inner side surface of the adjustment slot (61509). The axial ends of the squeezing roller (61512) of the first squeezing roller group are respectively connected to the action block (61511) on the first rotating member (61502), and the axial ends of the squeezing roller (61512) of the second squeezing roller group are respectively connected to the action block (61511) on the second rotating member (61503).

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