TW434282B - Process for producing thermoplastic rubber films or sheets by calendering and the products thereof - Google Patents

Abstract

The present invention discloses a process for preparing a thermoplastic rubber (TPR) film and a TPR leather of a laminated TPR film and cloth. In particular the present invention is directed to a calendering process for preparing the TPR film and TPR leather by formulating a suitable TPR composition and choosing suitable operating conditions for the calendering process. A suitable TPR for use in the present invention includes the TPR which has a melt index (180 DEG C) > 1. The TPR alone or blended with another resin is calendered, to which a lubricant such as zinc stearate and polyethylene wax, optionally an anti-oxidation agent, and an UV absorber are added. A TPR composition calenderd by an inverted L-shaped calender composed of four calender rolls at a temperature of 120-170 DEG C has a melting viscosity ranging from 20,000 to 80,000 poise.

Description

4 34 28 2 Λι f .r-Emperor 87】 n__ 年月 a_ Amendment V. Description of the invention ^ Description of the conventional technology: TPR materials are generally used for injection and extrusion processing, and have not been calendered with a tape machine Processing β Injection and extraction processing polymer design focuses on fluidity; for example, injection processing 'compacts the compound in a hot melt state and squeezes it into the injection mold, while extrusion processing' flows out through T-DIE and then applies the coating film on the Casting method. Above the forming wheel, the focus of the winch calendering process is to control the melt strength under appropriate conditions and formulas, so that it can be extended as needed during the manufacturing process, so that the material does not stick to the surface of the forming equipment, and the desired film-like product is obtained. The injection molding process of TPR materials is based on the mixing of Tpfj resin, colorant, lubricant, stabilizer, etc., 'placed in the injection machine', and the temperature can be raised to 170 ° C ~ 250 ° depending on the ingredients. (: Into a good flow state, and then the molten material in the extrusion barrel cavity before the screw is injected into the mold and then molded and cooled to form w. The molded product is individual materials, such as shoe soles instead of rubber. Extrusion molding processing is not as extensive in the application of TPR material as injection molding. It is the processing of TPR rubber particles, colorants, stabilizers, lubricants and other processing aids to mix, put them into the extruder, extruder There is a heating device on the extruding cylinder. The temperature of the material is raised to the required temperature in two to five stages. 〇 ~ 250 C) 'The extruding cylinder has a structure for different measurement, mixing, and feeding needs. Design different screws, so that the mixture can be ordered in order to achieve the purpose of melting and gelling. 'After filtering out the screw, Static Mixer' The τ mold distributes the material with good fluidity and evenly distributes it. The mold is technically coated on the surface of the electroplated bright or engraved forming wheel and cooled to plastic to obtain the finished product.

Page 5 4342S1 '__ Case No. 87109842 # a Revision V. Description of the invention (2) Thermoplastic rubber contains SBS and SEBS. Because the melt viscosity is lower than that of PVC, PVC is more suitable for tape processing. The melt viscosity is 20.0. 〇 ~ 80 ％, 〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇〇POpise, if the TPR material chooses MI (180 ° C) > 1, the temperature is slightly higher (1 70 ° C ~ 200 ° C), because the melt viscosity drops 20, 〇〇〇p〇ise hereinafter be adhered to the surface of the forming wheel 'peeling difficult, can not be processed; TPR material and, if I (1 8 0 ° C) < 1, then to which 1 5 0 ° C ~ 17 0 ° C is still not easy to gel flow (the dryness is too high> 80,000 Poise), and above 170 ° C, it is easy to turn yellow and deteriorate sticky wheels, forming difficult. Description of the invention technology: Due to the current general known technology, SBS (Styrene-Butadiene-Styrene Block Copolymer), SEBS (Styrene-Ethylene. Butene— Styrene-Ethylene. Butylene-Styrene Block

Copolymer) and its blended blends have not been processed in this way due to the difficulty in processing the films and sheets with a smart cloth machine due to insufficient melt viscosity and strength. There is a bell here to "research by Ruisi" to complete the production method of the present invention, select the appropriate TPI and batch materials of MI, and under appropriate operating conditions, finally develop a method of using a blanket machine to roll into films and sheets. (ΜΙ (18〇) > 1), colorants (0 ~ 40 PHR), zinc stearate (0, 2 ~ 2. 0pHR), lubricants such as PE-MX (0.05 ~ 1,0 PHR), Antioxidants (ο "~ 2.5 PHR), ultraviolet absorbers (0.3 ~ 5 PHR), etc. are mixed with a high-speed mixer (such as 1 in the first figure), and the mixture is put into a ten-horsepower machine (the first figure is 2) The milk is pressed at a temperature range of 110 C to 150 C for 22 to 6 minutes to uniformly mix the materials and form a melted block, and then put them into the mixing mill (

Page 6 4S4 £ 82j | V. Description of the invention ¢ 3) No. 8Ή 09842Η Corrected the first picture 3) at 110 170 ° C to fully turn the material to promote more homogeneous sentence mixing and gelatinization, and then pass Pass the extruder (No. 4 of the first picture) and filter the impurities, and then put it into the tape machine (No. 5 of the first picture). The wheel surface temperature is 12 (TC ~ I7cre, the operating viscosity is 20,000 ~ 8 0, 0 00 poise, front and top). The speed ratio of the middle, middle and lower wheels is 1 · '(1,25 ~ 1.35): (ι · 28 ~; [.38): (1.31 ~ 1.41)' Rolled to the required thickness' and then go through the embossing wheel (such as the first Figure 6) At a temperature of 10 ° C ~ 60 ° C, the cooling wheel (such as 7 in the first figure) is cooled to form TPR 臈 at a temperature range of 10 ° C ~ 60 ° C, and finally rolled into a roll. Take-up machine (such as 8 in the first picture). If this method is not used, a kneader or similar function equipment can be extruded, instead of a rolling mill, a planetary extruder or other extruding function can be used. And its calendering machine (Calender) is unchanged; the main point of this process control is the proper control of the temperature of the calendering machine and the proper matching of the formula. When processing the TPR compound material, the glands and sheets rolled out can be attached to the base cloth, and the base cloth is passed through the sending rack (second picture A-6), and is rolled on the embossing wheel (second picture A-5) ) Laminating non-woven fabrics, plain woven fabrics, knitted fabrics and other base fabrics to make TPR rubber. "The base fabric is first passed through the lower molecular weight solubles of honey cloth TPR or PU paste to enhance the adhesion with TPR films and sheets. After the adhesion of the semi-finished product with the base cloth treated with p U-based treatment agent (second picture B-10) 'After passing through the embossing machine, preheating wheel (second picture CΗ), Heater (heater ) (Second picture c-15), embossing wheel (second picture C-16) embossed products with various surface textures, shaped by the cooling wheel (second picture 〇Π), and finally rolled up (second picture C 18). In the present invention, in order to make the TPR (Th in glue ermop 1 as tic 43428 2 EM 871Q9fU9 Λ_Η), the amendment is described in the invention (4) cloth calendering process' is using TPR (SBS or SEBS MI = 1 ~ 50 (180. C). In order to make the finished product have various required color and lustre, the colorant is used in the present invention, and can be used in one of the groups of ingredients such as PE color particles or toner. 0 ~ 40PHR. The lubricant used in the present invention is selected from the group consisting of zinc stearate and polyethylene wax. Its main function is to increase the release of TPR during processing during the calendering process of the blanket machine and reduce the TPR during the molding process. 05〜1. 〇PHR。 With the stickiness of equipment (such as rollers) ° I use depending on the release needs can be used stearic acid 〇2〜2〇pHR, polyethylene wax 0. 05 ~ 1. 〇PHR. 5 PHR In order to extend the outdoor use time of the TPR film and rubber of the present invention and to prevent degradation due to the action of ultraviolet rays, antioxidants and ultraviolet absorbers may be used; the dosage may be based on the weatherability requirements. Antioxidants 0.3 to 2.5 PHR , UV absorber 0.3 · ~ 2.5 PHR. The following examples are used to illustrate the manufacturing method of the present invention: Implementation 1 of the present invention: (TPRf ilm manufacturing method with a thickness of 0.25 m / m, such as sample ') TPR rubber particles (MI = 4) ratio of 50, LLDPE (MI = 2 8) Ratio 50, zinc stearate 0.3 PHR, polyethylene wax 〇1 pHR, colorant 3 〇pHR, antioxidant 0.5 PHR, etc. Add = mix with a high-speed mixer (such as the one in the first figure), The mixture is put into a ten-horsepower machine (first picture 2) 150 ° C and rolled for 5 minutes, so that the materials are evenly mixed and melted into a lumpy material, and then fed into a mixing milk turbine (see-picture of 3) Medium at 15 °. 〇 Fully turn the material to promote the homogeneous mixing and gelation degree, and then extrude it through filtration (the first selection of the 4 melting index)

43428 2 Μ V. Description of the invention

Correct the upper, middle, and upper 15oC, the middle wheel HSt :, the lower wheel 145 ° C; front of the blanket machine,), the output: the lower wheel speed ratio is 1: (1.30): (1.33): (1.3 6 as The first t needs to keep the film material flat with moderate tension, and then embossed at 30 ° C through the embossing wheel (γ 1-6), and passed the cooling wheel 48% 0x15 i 7 in the first picture) at 30 ° C Fully cool and set under the range, and finally take up with a coiler (such as 8 in the first figure). Implementation 2 of the present invention: (Method of making a base cloth τρβ rubber with a thickness of 1.6 m / m, such as sample two) R rubber particles (MI = 4) ratio 100, zinc stearate 0.3 PHR, \ ethyl wax 〇. 1 PHK, colorant 3_ 0 PHR, antioxidant 0.5 PHR, purple evening line absorbent 0.5 pM, etc. are mixed with a high-speed mixer, the mixture is put into a 10,000 horsepower machine at 150 t: rolling temperature 5 Minutes, the material is evenly mixed and melted into a lumpy material, and then put into a mixing mill to turn the material at 507 to promote more uniform mixing and gelation. Molding temperature: front wheel 155 ° C, upper wheel 15 (TC, middle wheel i45t, lower wheel 145t; speed ratio of front, upper, middle, and lower wheels of the adhesive tape machine is 2: I 33: (丨 .33): (1.36), at The tape machine is calendered at the same time as the non-woven base cloth is laminated on the embossing wheel (5 in the second figure 8) to obtain TPR rubber. The base cloth is first coated with TpR lower molecular weight solubilizer or PU paste to enhance Adhesion to TpR film. The semi-finished product of the base cloth is treated with PU-based treatment agent (second picture B-10), and then embossed by the preheating wheel 120 ° C (second picture c-H-1) , Heater (heater) l7 (rc (15 of the second picture C)), embossing wheel 30t > c (second picture C-16) emboss various surface textures and pass the cooling wheel 30t (second picture C (7) Cooling and setting 'final winding (second picture c-8).

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Claims (1)

Amendment 4342B2 案 _ Case No. 8Ή 09842 6. Scope of patent application 1. A method for manufacturing thermoplastic films TPR (Thermoplastics Rubber) by calendering films and plates refers to the production of TPR (SBS, SEBS and its The method for preparing a mixed blend) film and sheet is characterized by: TPR colloidal particles (MI (1.80 t:) > 1), colorants (0 to 40 PHR), zinc stearate (0.2 to 2) 2. 0 PHR), PE-WAX and other lubricants (0.05 to 1.0 PHR), antioxidants (0.3 to 2.5 PHR), UV absorber C 0.3 to 2.5 PHR, etc. Mix with a high-speed mixer, put the mixture into a 10-horsepower machine and dry-press for 2 to 6 minutes at a temperature of 110 ° C to 150 ° C to make the materials evenly mixed into a melted block. In the rolling mill, the material is fully turned at 丨 〇1 ～ 丨 7 to promote more uniform mixing and gelatinization degree. Then the filter extruder is used to filter out impurities and put into the blanket machine. The wheel surface temperature is 120 ° C ~ 170 ° c. Operating viscosity at 20,000 ~ 8G'〇〇0 P〇ise, rotation speed ratio of front, upper, middle, and lower wheels is 1: (1.25 to 1.35): (1.28 to 1.3 8): (1.31 ~ 1.41) Calender to the required thickness, and then embossed at a temperature of 10 t: ~ 6 0 ° C. The cooling wheel is TPR film at a temperature range of 10 ° C ~ 60 ° C. It is cooled and formed, and finally wound up by a coiler. L A type of thermoplastic rubber film and sheet product, which is produced by calendering a film or sheet using the thermoplastic rubber TPR (Thermoplastics Rubber) described in item 1 of the scope of patent application. Non-woven fabrics and plain woven fabrics, which are coated with adhesives such as lower molecular weight TPR or PU paste, which are coated with embossing 1 before being rolled on the conveyor and tape machine, while being embossed. 'TPR rubber is obtained from knitted fabrics and other base fabrics; then treated with a PU-based treatment agent, made, re-embossed by an embossing machine, and preheated to extrude various desired textures, and cooled Λ3 42Β 2 t No. 87109842_year Month and Day Amendment 6. The scope of the patent application is finalized. The final winner is Bϋ Page 12