CN116277825A - Production method of TPU film for exhaust type laminated glass - Google Patents
Production method of TPU film for exhaust type laminated glass Download PDFInfo
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- CN116277825A CN116277825A CN202310241782.7A CN202310241782A CN116277825A CN 116277825 A CN116277825 A CN 116277825A CN 202310241782 A CN202310241782 A CN 202310241782A CN 116277825 A CN116277825 A CN 116277825A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 38
- 239000005340 laminated glass Substances 0.000 title claims abstract description 36
- 125000001931 aliphatic group Chemical group 0.000 claims abstract description 45
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 30
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000000741 silica gel Substances 0.000 claims abstract description 22
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 22
- 238000004049 embossing Methods 0.000 claims abstract description 15
- 229910052742 iron Inorganic materials 0.000 claims abstract description 15
- 238000005096 rolling process Methods 0.000 claims abstract description 14
- 238000005266 casting Methods 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 230000003746 surface roughness Effects 0.000 claims description 2
- 239000011521 glass Substances 0.000 abstract description 31
- 238000003475 lamination Methods 0.000 abstract description 6
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 76
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 76
- 239000010410 layer Substances 0.000 description 17
- 239000000463 material Substances 0.000 description 13
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 9
- 230000006872 improvement Effects 0.000 description 8
- 239000012528 membrane Substances 0.000 description 7
- 229920000728 polyester Polymers 0.000 description 7
- 239000005336 safety glass Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 239000012790 adhesive layer Substances 0.000 description 4
- 229920000515 polycarbonate Polymers 0.000 description 4
- 239000004417 polycarbonate Substances 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 229910003460 diamond Inorganic materials 0.000 description 3
- 239000010432 diamond Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/002—Combinations of extrusion moulding with other shaping operations combined with surface shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2007/00—Flat articles, e.g. films or sheets
- B29L2007/008—Wide strips, e.g. films, webs
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
The utility model discloses a production method of TPU film for exhaust type laminated glass, which is characterized by comprising the following steps: s1, putting a PE release film which is prepared in advance and has grains on the surface into a silica gel matte roller; s2, placing the aliphatic TPU raw material into a blanking hopper of a casting machine, entering a screw, extruding into a film from a die head, and feeding the film between a silica gel matte roller and an iron embossing roller; s3, controlling the silica gel matte roller and the iron embossing roller to work, enabling the aliphatic TPU film formed by the die head to be attached to the surface of the PE release film with the grains, extruding the grains on the two surfaces, and then rolling by a rolling machine. According to the utility model, through designing the exhaust lines on the surface of the TPU, the gas in the glass lamination process is easy to exhaust, the finally produced glass has clear appearance, no appearance problems such as bubbles and the like, the lamination speed is accelerated, and the yield and the production efficiency are greatly improved.
Description
Technical Field
The utility model relates to the technical field of TPU film production, in particular to a TPU film production method for ultra-exhaust laminated glass.
Background
Safety glass is commonly used in important facilities such as bank gates, valuables showcases, prisons, doors and windows of teaching centers and the like, and the parts can be broken due to severe impact, so that the requirement on impact resistance is very high, the requirements on observation are met, the bullet shooting can be resisted within a certain distance and the bullet shooting can not be penetrated, the personal safety is protected to the greatest extent, and the safety glass has the characteristics of high impact resistance, good light transmittance, heat resistance, cold resistance and the like. The safety glass is a composite material obtained by special processing of glass (or organic glass) and high-quality engineering plastics. At present, the safety glass is basically obtained by laminating an organic material layer in a common glass layer, wherein the safety glass comprises a main bearing layer, a bulletproof film transition layer and a safety protection layer which are sequentially laminated from outside to inside, and the main bearing layer and the multiple bulletproof film transition layers are laminated together through bonding materials. The safety protection layer is a Polycarbonate (PC) sheet, the bulletproof layer is a Polyester (PET) sheet, the Polyester (PET) sheet and the glass cannot be bonded, the glass can be bonded through bonding materials, and the main bearing layer is formed by bonding two pieces of comprehensive reinforced glass through bonding materials. The laminated glass is required to be slightly low, and the thickness or the number of layers of the PC and PET sheets can be reduced.
The prior laminated glass bonding layer in the market is mainly made of polyvinyl butyral (PVB), but PVB materials contain plasticizers, are easy to embrittle at low temperature, have insufficient strength, are atomized at the edge after being compounded and are not optimal bonding materials.
The Thermoplastic Polyurethane (TPU) material not only has the performance of PC and PET, but also has excellent adhesive performance, can be directly adhered to glass, does not contain plasticizer, has high strength, and can be used as an adhesive layer to increase the impact resistance effect of the glass. Meanwhile, the TPU has good light transmittance, low haze, high elasticity and ductility, does not deform in a curved glass interlayer, has good low temperature resistance, can reach 50 ℃ below zero, has good low temperature resistance of an aliphatic TPU material, can reach 60 ℃ below zero, has outstanding cold resistance, can increase the low temperature resistance of laminated glass, has the effect of never yellowing, and is a material very suitable for safety glass production.
The production process of the laminated glass includes the steps of surface toughening treatment and cleaning, and the laminated glass is produced with glass, adhesive layer, PC, PET and other material and through the steps of superposing and setting in certain proportion, and vacuum bag to exhaust. And then placing the glass semi-finished product after the air exhaust into an autoclave, heating and pressurizing, and performing lamination to finally obtain the finished laminated glass. The aliphatic TPU material is used as an adhesive layer of the safety laminated glass and has excellent performance. However, the aliphatic TPU material has very low setting speed and low melting speed during heating, and bubbles in the middle of the multi-layer glass are not easy to be discharged cleanly and are easy to generate bad bubbles in the glass production process.
To overcome the problem of film exhaust, chinese utility model patent: PVB film for preventing bubble generation, patent No.: 201821223876.2, the lower base layer of PVB film is provided with crisscross exhaust meshes, and extends to four measuring end faces of the lower base layer, and the end faces are provided with a plurality of evenly distributed air inlet holes communicated with the exhaust meshes, so that the lamination prevents the generation of bubbles. The vent mesh of this patent does not define concave and convex surfaces of the surface and the vent mesh is present only in the lower base layer of the multilayer structure. And according to different needs, the safety glass often needs to be overlapped with the membrane for many times, and if only one surface is exhausted, the effect is not ideal.
Chinese utility model patent: a polyvinyl butyral film, patent No.: 201120390535.6 the concave-convex knurling is arranged on the front and the back of the PVB film main body respectively, so that uniform gaps are generated when the front and the back of the PVB film are contacted with glass, exhaust of the film during film combination is facilitated, roughness of the front and the back is uniform, and the use requirement of the laminated glass can be met while the production speed of the film is improved. The concave-convex embossed patterns are arranged on the front surface and the back surface of the diaphragm, and exhaust is carried out by means of gaps generated after the concave-convex embossed patterns are contacted with glass, so that the exhaust patterns are only simple concave-convex surfaces, no exhaust design exists, and the exhaust effect of the TPU diaphragm is poor; and if the TPU film is used for the TPU film, the multi-layer film is overlapped, if the TPU film is randomly placed in the longitudinal and transverse directions, a cross grid can be generated, gas is sealed on small points in the middle, and bad bubbles are generated.
The aliphatic TPU membrane and the PVB membrane are completely different materials, the shaping speed of the aliphatic TPU material is low, the difficulty of air exhaust is greatly increased, and the surface texture effect is particularly important.
Therefore, the existing TPU film production method needs to be further perfected.
Disclosure of Invention
The utility model aims to overcome the defects in the prior art and provides a TPU film production method with good exhaust effect, wherein the TPU film is used as an adhesive layer of safety laminated glass.
In order to achieve the above purpose, the present utility model adopts the following scheme: the production method of the TPU film for the exhaust type laminated glass is characterized by comprising the following steps of:
s1, putting a PE release film which is prepared in advance and has grains on the surface into a silica gel matte roller;
s2, placing the aliphatic TPU raw material into a blanking hopper of a casting machine, entering a screw, extruding into a film from a die head, and feeding the film between a silica gel matte roller and an iron embossing roller;
s3, controlling the silica gel matte roller and the iron embossing roller to work, enabling the aliphatic TPU film formed by the die head to be attached to the surface of the PE release film with the grains, extruding the grains on the two surfaces, and then rolling by a rolling machine.
As another improvement of the TPU film production method for the exhaust laminated glass, the front grain of the aliphatic TPU consists of a plurality of square bulges, a first exhaust groove is arranged between two adjacent square bulges, and the front roughness RZ value is 15-60..
As another production method of TPU film for exhaust laminated glassThe area of the square bulge is 1-4mm 2 。
As another improvement of the TPU film production method for the exhaust laminated glass, the width of the first exhaust groove is 0.5-2mm, and the depth of the first exhaust groove is 0.02-0.06mm.
As another improvement of the TPU film production method for the exhaust laminated glass, the square bulges have irregular and uneven surfaces, which is helpful for the fine gas to be driven to the exhaust line for centralized removal.
As another improvement of the TPU film production method for the exhaust laminated glass, the texture on the back surface of the aliphatic TPU film is composed of a plurality of diamond-shaped bulges, a second exhaust groove is arranged between two adjacent diamond-shaped bulges, and the back surface roughness RZ value is 15-60..
As another improvement of the production method of the TPU film for the exhaust laminated glass, the area of the diamond-shaped protrusions is 1-4mm 2 。
As another improvement of the TPU film production method for the exhaust laminated glass, the width of the diamond-shaped protrusions is 0.5-2mm, and the depth of the second exhaust grooves is 0.02-0.06mm.
As another improvement of the TPU film production method for the exhaust laminated glass, the surface of the diamond-shaped protrusions 10 is irregular and uneven, so that tiny gas can be driven to the exhaust line for centralized removal.
As another improvement of the TPU film production method for the exhaust type laminated glass, the texture on the PE release film is produced by adopting a roller with the surface provided with the texture consistent with the texture on the back surface of the TPU film, wherein the depth of the texture is 0.03-0.07mm, and the roughness RZ value is 20-70.
In summary, compared with the prior art, the utility model has the following beneficial effects:
according to the utility model, through designing the exhaust lines on the surface of the TPU, the gas in the glass lamination process is easy to exhaust, the finally produced glass has clear appearance, no appearance problems such as bubbles and the like, the lamination speed is accelerated, and the yield and the production efficiency are greatly improved.
Drawings
FIG. 1 is a schematic view of the TPU film production equipment of the present utility model.
Fig. 2 is a schematic representation of the front side texture of the aliphatic TPU of this utility model.
FIG. 3 is a schematic representation of the reverse texture of the aliphatic TPU of the present utility model.
Wherein, 1, discharging hopper; 2. a screw; 3. a die head; 4. silica gel matte roller; 5. an iron embossing roller; 6. a winding machine; 7. PE release film rolls; 8. square protrusions; 9. a first exhaust recess; 10. diamond-shaped protrusions; 11. and a second exhaust groove.
Detailed Description
The above and further technical features and advantages of the present utility model are described in more detail below with reference to the accompanying drawings.
Example 1
The production method of the TPU film for the exhaust type laminated glass comprises the following steps:
s1, putting a PE release film which is prepared in advance and has grains on the surface into a silica gel matte roller 4;
s2, placing the aliphatic TPU raw material into a blanking hopper 1 of a casting machine through a PE release film roll, entering a screw 2, extruding into a film from a die head 3, and feeding the film between a silica gel matte roller 4 and an iron embossing roller 5;
s3, controlling the silica gel matte roller 4 and the iron embossing roller 5 to work, enabling the aliphatic TPU film formed by the die head to be attached to the surface of the PE release film with the grains, extruding the grains on the two surfaces, and then rolling by the rolling machine 6.
Wherein the front grain of the aliphatic TPU consists of a plurality of square bulges 8, and a first exhaust groove 9 is arranged between two adjacent square bulges 8. The square protrusion 8 has an area of 1mm 2 . The width of the first exhaust groove 9 is 0.5mm, and the depth of the first exhaust groove 9 is 0.02mm. Front roughness RZ value 15.
The first exhaust grooves 9 of the front grains of the aliphatic TPU are communicated vertically and horizontally, and gas in the middle of the glass can be discharged from an exhaust line when the glass is combined, so that the final glass is free of bubbles.
The texture on the back surface of the aliphatic TPU film is composed of a plurality of diamond-shaped bulges 10, and a second exhaust groove 11 is arranged between two adjacent diamond-shaped bulges 10. The area of the diamond-shaped bulge 10 is 1mm 2 . The width of the diamond-shaped protrusions 10 is 0.5mm, and the depth of the second exhaust grooves 11 is 0.02mm. The reverse roughness RZ value was 15.
According to the utility model, the diamond-shaped protrusions are adopted as the lines on the back surface of the aliphatic TPU membrane, so that interference with square protrusions on the front surface is effectively avoided.
The PE release film is produced by adopting a roller with the surface having the same texture as the texture on the back surface of the TPU film, and the texture on the PE release film is copied to the back surface of the aliphatic TPU film by pressing, so that the texture on the roller for producing the PE release film is slightly increased by the loss in the copying process, the texture depth is 0.03mm, the roughness RZ value is 20, and the area of the texture and the shape and the size of the second exhaust groove 11 are unchanged.
Example 2
The production method of the TPU film for the exhaust type laminated glass comprises the following steps:
s1, putting a PE release film which is prepared in advance and has grains on the surface into a silica gel matte roller 4;
s2, placing the aliphatic TPU raw material into a blanking hopper 1 of a casting machine through a PE release film roll, entering a screw 2, extruding into a film from a die head 3, and feeding the film between a silica gel matte roller 4 and an iron embossing roller 5;
s3, controlling the silica gel matte roller 4 and the iron embossing roller 5 to work, enabling the aliphatic TPU film formed by the die head to be attached to the surface of the PE release film with the grains, extruding the grains on the two surfaces, and then rolling by the rolling machine 6.
Wherein the front grain of the aliphatic TPU consists of a plurality of square bulges 8, and a first exhaust groove 9 is arranged between two adjacent square bulges 8. The square protrusion 8 has an area of 4mm 2 . The width of the first exhaust groove 9 is 2mm, and the depth of the first exhaust groove 9 is 0.06mm. Front roughness RZ value 60.
The first exhaust grooves 9 of the front grains of the aliphatic TPU are communicated vertically and horizontally, and gas in the middle of the glass can be discharged from an exhaust line when the glass is combined, so that the final glass is free of bubbles.
The texture on the back surface of the aliphatic TPU film is composed of a plurality of diamond-shaped bulges 10, and a second exhaust groove 11 is arranged between two adjacent diamond-shaped bulges 10. The area of the diamond-shaped protrusions 10 is 4mm 2 . The width of the diamond-shaped protrusions 10 is 2mm, and the depth of the second exhaust grooves 11 is 0.06mm. The reverse roughness RZ value was 60.
According to the utility model, the diamond-shaped protrusions are adopted as the lines on the back surface of the aliphatic TPU membrane, so that interference with square protrusions on the front surface is effectively avoided.
The PE release film is produced by adopting a roller with the surface having the same texture as the texture on the back surface of the TPU film, and the texture on the PE release film is copied to the back surface of the aliphatic TPU film by pressing, so that the texture on the roller for producing the PE release film is slightly increased by the loss in the copying process, the texture depth is 0.07mm, the roughness RZ value is 70, and the area of the texture and the shape and the size of the second exhaust groove 11 are unchanged.
Example 3
The production method of the TPU film for the exhaust type laminated glass comprises the following steps:
s1, putting a PE release film which is prepared in advance and has grains on the surface into a silica gel matte roller 4;
s2, placing the aliphatic TPU raw material into a blanking hopper 1 of a casting machine through a PE release film roll, entering a screw 2, extruding into a film from a die head 3, and feeding the film between a silica gel matte roller 4 and an iron embossing roller 5;
s3, controlling the silica gel matte roller 4 and the iron embossing roller 5 to work, enabling the aliphatic TPU film formed by the die head to be attached to the surface of the PE release film with the grains, extruding the grains on the two surfaces, and then rolling by the rolling machine 6.
Wherein the front grain of the aliphatic TPU consists of a plurality of square bulges 8, and a first exhaust groove 9 is arranged between two adjacent square bulges 8. The square protrusion 8 has an area of 2mm 2 . The first rowThe width of the air groove 9 is 1mm, and the depth of the first air discharge groove 9 is 0.04mm. Front roughness RZ value 35.
The first exhaust grooves 9 of the front grains of the aliphatic TPU are communicated vertically and horizontally, and gas in the middle of the glass can be discharged from an exhaust line when the glass is combined, so that the final glass is free of bubbles.
The texture on the back surface of the aliphatic TPU film is composed of a plurality of diamond-shaped bulges 10, and a second exhaust groove 11 is arranged between two adjacent diamond-shaped bulges 10. The area of the diamond-shaped protrusions 10 is 2mm 2 . The width of the diamond-shaped protrusions 10 is 1mm, and the depth of the second exhaust grooves 11 is 0.04mm. The reverse roughness RZ value was 40.
According to the utility model, the diamond-shaped protrusions are adopted as the lines on the back surface of the aliphatic TPU membrane, so that interference with square protrusions on the front surface is effectively avoided.
The PE release film is produced by adopting a roller with the surface having the same texture as the texture on the back surface of the TPU film, and the texture on the PE release film is copied to the back surface of the aliphatic TPU film by pressing, so that the texture on the roller for producing the PE release film is slightly increased by the loss in the copying process, the texture depth is 0.05mm, the roughness RZ value is 50, and the area of the texture and the shape and the size of the second exhaust groove 11 are unchanged.
Example 4
The production method of the TPU film for the exhaust type laminated glass comprises the following steps:
s1, putting a PE release film which is prepared in advance and has grains on the surface into a silica gel matte roller 4;
s2, placing the aliphatic TPU raw material into a blanking hopper 1 of a casting machine through a PE release film roll, entering a screw 2, extruding into a film from a die head 3, and feeding the film between a silica gel matte roller 4 and an iron embossing roller 5;
s3, controlling the silica gel matte roller 4 and the iron embossing roller 5 to work, enabling the aliphatic TPU film formed by the die head to be attached to the surface of the PE release film with the grains, extruding the grains on the two surfaces, and then rolling by the rolling machine 6.
Wherein the front grain of the aliphatic TPU consists of a plurality of square bulges 8, and a first exhaust groove 9 and a front roughness RZ value 38 are arranged between two adjacent square bulges 8.
The first exhaust grooves 9 of the front grains of the aliphatic TPU are communicated vertically and horizontally, and gas in the middle of the glass can be discharged from an exhaust line when the glass is combined, so that the final glass is free of bubbles.
The texture on the back surface of the aliphatic TPU film is composed of a plurality of diamond-shaped bulges 10, and a second exhaust groove 11 is arranged between two adjacent diamond-shaped bulges 10. The area of the diamond-shaped protrusions 10 is 2mm 2 . The width of the diamond-shaped protrusions 10 is 1mm, and the depth of the second exhaust grooves 11 is 0.04mm. The reverse roughness RZ value was 40.
According to the utility model, the diamond-shaped protrusions are adopted as the lines on the back surface of the aliphatic TPU membrane, so that interference with square protrusions on the front surface is effectively avoided.
The PE release film is produced by adopting a roller with the surface having the same texture as the texture on the back surface of the TPU film, and the texture on the PE release film is copied to the back surface of the aliphatic TPU film by pressing, so that the texture on the roller for producing the PE release film is slightly increased by the loss in the copying process, the texture depth is 0.05mm, the roughness RZ value is 50, and the area of the texture and the shape and the size of the second exhaust groove 11 are unchanged.
Example 4
This example differs from example 1 in that the TPU has a thickness of 0.38mm and a square area of 1mm 2 The roughness RZ value is 30, the depth of the first exhaust groove 9 is 0.03mm, the width is 0.5mm, and the diamond area is 1mm 2 The roughness RZ value is 25, the depth of the exhaust groove is 0.02mm, and the width is 0.5mm.
Example 5
This example differs from example 1 in that the TPU has a thickness of 0.63mm and a square area of 2mm 2 The roughness RZ value is 20, the depth of the first exhaust groove 9 is 0.04mm, the width is 0.8mm, and the diamond area is 2mm 2 The roughness RZ value is 35, the depth of the exhaust groove is 0.05mm, and the width is 0.5mm.
Example 6
This example differs from example 1 in that the TPU has a thickness of 1.27mm and a square area of 3mm 2 The roughness RZ value is 35, the depth of the first exhaust groove 9 is 0.06mm, the width is 2mm, and the diamond area is 4mm 2 The roughness RZ value is 45, the depth of the exhaust groove is 0.05mm, and the width is 1mm.
The foregoing has shown and described the basic principles and main features of the present utility model and the advantages of the present utility model. It will be understood by those skilled in the art that the present utility model is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present utility model, and various changes and modifications may be made without departing from the spirit and scope of the utility model, which is defined in the appended claims. The scope of the utility model is defined by the appended claims and equivalents thereof.
Claims (10)
1. The production method of the TPU film for the exhaust type laminated glass is characterized by comprising the following steps of:
s1, putting a PE release film which is prepared in advance and has grains on the surface into a silica gel matte roller (4);
s2, placing the aliphatic TPU raw material into a blanking hopper (1) of a casting machine, entering a screw (2), extruding into a film from a die head (3), and feeding the film between a silica gel matte roller (4) and an iron embossing roller (5);
s3, controlling the silica gel matte roller (4) and the iron embossing roller (5) to work, enabling the aliphatic TPU film formed by the die head to be attached to the surface of the PE release film with the grains, extruding the grains on the two surfaces, and then rolling by a rolling machine (6).
2. The production method of the TPU film for the exhaust laminated glass according to claim 1 is characterized in that the front grain of the aliphatic TPU consists of a plurality of square bulges (8), a first exhaust groove (9) is arranged between two adjacent square bulges (8), and the front roughness RZ value is 15-60.
3. An exhaust gas according to claim 2The production method of the TPU film for laminated glass is characterized in that the area of the square bulge (8) is 1-4mm 2 。
4. The production method of the TPU film for the exhaust laminated glass according to claim 2, wherein the width of the first exhaust groove (9) is 0.5-2mm, and the depth of the first exhaust groove (9) is 0.02-0.06mm.
5. The production method of the TPU film for the exhaust laminated glass according to claim 1 is characterized in that the surface of the square bulge (8) is irregularly uneven, so that tiny gas can be driven to the exhaust line for centralized removal.
6. The production method of the TPU film for the exhaust type laminated glass, which is disclosed in claim 1, is characterized in that the texture on the back surface of the aliphatic TPU film is composed of a plurality of diamond-shaped bulges (10), a second exhaust groove (11) is arranged between two adjacent diamond-shaped bulges (10), and the back surface roughness RZ value is 15-60.
7. The method for producing TPU film for exhaust laminated glass according to claim 6, characterized in that the area of the diamond-shaped protrusions (10) is 1-4mm 2 。
8. The method for producing the TPU film for the exhaust laminated glass according to claim 6, wherein the width of the diamond-shaped protrusions (10) is 0.5-2mm, and the depth of the second exhaust grooves (11) is 0.02-0.06mm.
9. The method for producing the TPU film for the exhaust laminated glass according to claim 1 is characterized in that the surface of the diamond-shaped protrusion (10) is irregularly rugged, so that tiny gas can be driven to the exhaust line for centralized removal.
10. The method for producing TPU film for exhaust type laminated glass according to claim 1, wherein the texture on the PE release film is made of a roller with the same texture as the texture on the back surface of the TPU film, the depth of the texture is 0.03-0.07mm, and the roughness RZ value is 20-70.
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