CN113736263A - Novel silicon rubber, novel composite silicon rubber label and manufacturing method thereof - Google Patents
Novel silicon rubber, novel composite silicon rubber label and manufacturing method thereof Download PDFInfo
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 145
- 239000002131 composite material Substances 0.000 title claims abstract description 59
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 16
- 238000002372 labelling Methods 0.000 title description 2
- 239000004945 silicone rubber Substances 0.000 claims abstract description 73
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 38
- 239000000945 filler Substances 0.000 claims abstract description 22
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 18
- 229920001971 elastomer Polymers 0.000 claims description 64
- 239000005060 rubber Substances 0.000 claims description 60
- 239000000463 material Substances 0.000 claims description 52
- 238000010074 rubber mixing Methods 0.000 claims description 45
- 238000002156 mixing Methods 0.000 claims description 31
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 24
- 239000003795 chemical substances by application Substances 0.000 claims description 22
- 239000000203 mixture Substances 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 12
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 11
- 238000004073 vulcanization Methods 0.000 claims description 6
- 239000002210 silicon-based material Substances 0.000 claims description 3
- 239000003921 oil Substances 0.000 abstract description 11
- 239000000126 substance Substances 0.000 abstract description 4
- 241001391944 Commicarpus scandens Species 0.000 abstract description 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 150000001875 compounds Chemical class 0.000 description 8
- 239000004698 Polyethylene Substances 0.000 description 7
- 238000007670 refining Methods 0.000 description 7
- 230000032683 aging Effects 0.000 description 5
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
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- 238000002360 preparation method Methods 0.000 description 2
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- 239000005977 Ethylene Substances 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
Abstract
The invention provides novel silicon rubber, a novel composite silicon rubber label and a manufacturing method thereof. The novel silicon rubber provided by the invention comprises the following components in parts by mass: 45-80 parts of silicone rubber master batch; 20-50 parts of a thermoplastic elastomer; 0.8-1.2 parts of a compatilizer; 1.5-2.5 parts of a nano filler; the novel silicon rubber provided by the invention takes a silicon rubber master batch and a thermoplastic elastomer as main components, is matched with a compatilizer and a nano filler, and is matched according to the dosage, so that the novel silicon rubber with wear resistance, high strength, oil resistance, weather resistance, hydrophobicity and chemical stability is formed, and the problems that a label suture is easy to break, stretch and break and oil easily appears in the prior art are solved.
Description
Technical Field
The invention relates to the field of clothing accessory labels, in particular to a novel composite silicone rubber label.
Background
The silicone rubber is a high polymer material with excellent performance, has better high and low temperature resistance, weather resistance and aging resistance, excellent electrical property, special surface property and inertia, but has certain defects in the aspects of mechanical strength and oil resistance.
At present, the labels made of the clothing accessories are usually made of silicon rubber, but the mechanical strength of the silicon rubber is poor, and the stitches of the labels made of the silicon rubber are easy to break, stretch and break and are easy to produce oil.
Therefore, it is necessary to provide a new composite silicone rubber label to solve the above technical problems.
Disclosure of Invention
The invention provides a novel composite silicon rubber label, which solves the problem of poor comprehensive performance of a label made of a single material in the prior art by combining silicon rubber and a thermoplastic elastomer.
In order to solve the technical problems, the technical scheme of the invention is as follows:
the novel silicon rubber comprises the following components in parts by mass:
wherein the thermoplastic elastomer is one or a mixture of more of PP, TPU, PE, PET and ABS materials; the compatilizer is one or a mixture of more of silane coupling agents kh550, kh907 and kh 560; the nano filler is a porous organic silicon material.
Preferably, the addition amounts of the silicone rubber master batch, the thermoplastic elastomer, the compatilizer and the nanofiller are respectively 70-72 parts, 26-28 parts, 1 part and 1 part by mass; the thermoplastic elastomer is RTPU5770, and the compatilizer is a silane coupling agent kh 550.
Preferably, the addition amounts of the silicone rubber master batch, the thermoplastic elastomer, the compatilizer and the nanofiller are respectively 55-65 parts, 33-43 parts, 1 part and 1 part by mass; the thermoplastic elastomer is RTPU, and the compatilizer is a silane coupling agent kh 550.
Preferably, the addition amounts of the silicone rubber master batch, the thermoplastic elastomer, the compatilizer and the nanofiller are 75-80 parts, 18-23 parts, 1 part and 1 part by mass respectively; the thermoplastic elastomer is RTPU, and the compatilizer is a silane coupling agent kh 550.
The invention also provides a manufacturing method of the novel silicon rubber in the technical scheme, which comprises the following steps:
adding the silicone rubber masterbatch, the thermoplastic elastomer, the compatilizer and the nano filler into an internal mixer according to a certain proportion for mixing rubber to obtain novel silicone rubber; wherein the rubber mixing temperature is 160-180 ℃, and the rubber mixing time is 0.5-1.5 h; the heating speed is 6-15 ℃/min during rubber mixing;
sequentially putting the color paste, the vulcanizing agent and the novel silicon rubber on a double-rod rubber mixing mill to be mixed with the rubber to obtain a rubber material; wherein, the novel composite silicone rubber accounts for 96-98 parts by mass, the color paste accounts for 1-2 parts by mass, and the vulcanizing agent accounts for 2-3 parts by mass;
carrying out slitting operation on the rubber material by using a slitting machine to obtain rubber material slitting;
placing the rubber strips into a vulcanizing machine through a mold, vulcanizing the rubber strips in the mold at high temperature, and demolding to obtain the novel composite silicone rubber label; wherein the vulcanizing time is 70-110 seconds, and the vulcanizing temperature is 180-200 ℃;
the silicone rubber master batch is the silicone rubber master batch described in any one of claims 1-4.
Preferably, in the step: the adding proportion of the color paste, the vulcanizing agent and the novel silicon rubber is 1:2:97, the rubber mixing temperature is 160-180 ℃, the rubber mixing time is 1-1.5h, and the temperature rise speed during rubber mixing is 6-8 ℃/min.
Preferably, in the step: the adding proportion of the color paste, the vulcanizing agent and the novel silicon rubber is 1:2:97, the rubber mixing temperature is 160-180 ℃, the rubber mixing time is 0.5-1h, and the temperature rise speed during rubber mixing is 10-12 ℃/min.
Preferably, in the step: the adding proportion of the color paste, the vulcanizing agent and the novel silicon rubber is 1:3:96, the rubber mixing temperature is 160-180 ℃, the rubber mixing time is 1-1.5h, and the temperature rise speed during rubber mixing is 6-8 ℃/min.
Preferably, in the method, the adding ratio of the color paste, the vulcanizing agent and the novel silicon rubber is 1:2:97, the rubber mixing temperature is 180 ℃, the rubber mixing time is 0.58h, the temperature rise speed during rubber mixing is 12 ℃/min, the vulcanizing time is 75 seconds, and the vulcanizing temperature is 200 ℃.
The invention also provides a novel composite silicone rubber label which is prepared by the manufacturing method in the technical scheme.
Compared with the prior art, the invention has the beneficial effects that: the novel silicon rubber takes a silicon rubber master batch and a thermoplastic elastomer as main components, and is matched with a compatilizer and a nano filler, and the components are matched according to the dosage. The silicon rubber has good high and low temperature resistance, weather aging resistance, excellent electrical property, special surface property and inertia. The thermoplastic elastomer has excellent performance, wide hardness range, excellent tensile property, antiskid, wear resistance and weather resistance and simple forming and processing. Under the synergistic effect of the components, the silicone rubber and the thermoplastic elastomer are compounded and modified to manufacture the novel high-performance composite silicone rubber label. The novel composite silicon rubber label has the advantages of wear resistance, high strength, oil resistance, weather resistance, hydrophobicity and chemical stability. The problem of among the prior art label suture easy fracture, tensile easy fracture, easy oil that produces is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required in the embodiments are briefly introduced below, and the drawings in the following description are only corresponding to some embodiments of the present invention.
Fig. 1 is a flow chart of the manufacturing process of the novel composite silicone rubber label.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the drawings, elements having similar structures are denoted by the same reference numerals.
The terms "first," "second," and the like in the terms of the invention are used for descriptive purposes only and not for purposes of indication or implication relative importance, nor as a limitation on the order of precedence.
The invention provides novel silicon rubber which comprises the following components in parts by mass:
the thermoplastic elastomer of the invention is one or a mixture of more of PP, TPU, PE, PET and ABS materials, wherein TPU and PET are preferred. The compatilizer is one or a mixture of more of silane coupling agents kh550, kh907 and kh560, wherein kh550 is preferred. The nano filler is a porous organic silicon material.
The invention also provides a preparation method of the novel silicon rubber in the technical scheme, which comprises the following steps: adding the silicone rubber masterbatch, the thermoplastic elastomer, the compatilizer and the nano filler into an internal mixer according to a certain proportion for mixing rubber to obtain the novel silicone rubber.
The invention also provides a manufacturing method of the novel composite silicone rubber label, which comprises the following steps:
s1, adding the silicone rubber master batch, the thermoplastic elastomer, the compatilizer and the nano filler into an internal mixer according to a certain proportion for mixing rubber to obtain novel silicone rubber;
s2, sequentially putting the color paste, the vulcanizing agent and the novel silicon rubber on a double-roll rubber mixing mill to be mixed with the rubber to obtain rubber;
s3, carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips;
s4, placing the rubber strips into a vulcanizing machine through a mould, vulcanizing the rubber strips in the mould at high temperature, and demoulding to obtain the novel composite silicone rubber label;
in the method, the rubber mixing temperature in the step S1 is 160-180 ℃, and the rubber mixing time is 0.5-1.5 h. The rubber mixing temperature is optimal at 150 ℃ and 180 ℃, and when the temperature is too low, the rubber mixing is not uniform, and when the temperature is too high, the compound rubber is aged. The time is best between 0.5 and 1 hour, too short rubber mixing is not uniform, a multi-phase structure occurs, and too long causes the composite material to be hardened.
The heating speed is 6-15 deg.C/min. The heating rate has great influence on the mixing condition, the heating rate is lower than 6 ℃/min, the mixing time of the silicon rubber and the thermoplastic material is long, and the brittleness of the material is increased after multiple times of mixing. When the temperature rise speed is higher than 15 ℃/min, the temperature rise speed is too high, the temperature is easily overhigh, the mixing is not uniform, and the composite material is aged.
In the step S2, the mass percentage of the novel composite silicon rubber is 96-98%, the mass percentage of the color paste is 1-2%, and the mass percentage of the vulcanizing agent is 2-3%. The vulcanizing agent is controlled to be 1% -2% and lower than 1%, the composite material is not easy to cure and is higher than 2%, and the hardness of the material is higher. The color paste does not greatly affect the composite silicone rubber, but if it is too much, the hardness is likely to increase.
The vulcanization time in the step S4 is 70 seconds to 110 seconds, and the vulcanization temperature is 180 ℃ to 200 ℃. The vulcanization time is too short, the rubber cannot be vulcanized, and demolding is not easy; the vulcanization time is too long, the rubber is easy to burn, and the quality is affected. The temperature is controlled to be about 190 ℃, the temperature is lower than 180 ℃, and the curing is not easy to occur; the temperature is higher than 200 ℃, and the coke is easy to burn.
Meanwhile, with reference to fig. 1, the manufacturing process of the novel composite silicone rubber label is explained in detail as follows:
it is to be noted, however, that the following description of various embodiments of the present invention is provided by way of example for purposes of further understanding, and it is to be understood that such description is merely intended to further illustrate features and advantages of the present invention and is not intended to limit the scope of the appended claims.
Example 1:
mixing silicone rubber compound ZH2650, thermoplastic elastomer RTPU5770, compatilizer silane coupling agent kh907, porous organosilicon nano filler and the like in percentage by mass of 72: adding the mixture into an internal mixer at a ratio of 26:1:1, heating to 180 ℃ at a speed of 12 ℃/min, and mixing and refining the mixture at 180 ℃ for 20min to obtain novel silicon rubber; putting the black color paste, a vulcanizing agent and novel silicon rubber into a double-rod rubber mixing mill according to the mass percentage of 1:2:97, and mixing for 3min to obtain a rubber material; and (3) carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips, then placing the rubber material strips into a vulcanizing machine through a mould, vulcanizing the rubber material in the mould at the high temperature of 200 ℃ for 75 seconds, and demoulding to obtain the novel composite silicone rubber label.
The silane coupling agent kh907 is a coupling agent and is mainly used for coupling organic high polymers and inorganic matters to enable the organic high polymers and the inorganic matters to be chemically bonded into a whole so as to improve the ageing resistance of the polymer.
The tensile strength of the novel composite silicone rubber label obtained by the method is obviously improved; the tensile strength of the common silicon rubber label is 8.5MPa, the tensile strength of the novel composite silicon rubber label is 9.8MPa, and the tensile strength is improved by 15.3 percent. And moreover, the kh907 is adopted as a silane coupling agent, so that the aging resistance of the novel composite silicone rubber label is improved.
Example 2:
mixing silicone rubber compound ZH2650, thermoplastic elastomer RTPU5770, compatilizer silane coupling agent kh560, porous organosilicon nano filler and the like according to the mass percentage of 72: adding the mixture into an internal mixer at a ratio of 26:1:1, heating to 180 ℃ at a speed of 12 ℃/min, and mixing and refining the mixture at 180 ℃ for 20min to obtain novel silicon rubber; putting the black color paste, a vulcanizing agent and novel silicon rubber into a double-rod rubber mixing mill according to the mass percentage of 1:2:97, and mixing for 3min to obtain a rubber material; and (3) carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips, then placing the rubber material strips into a vulcanizing machine through a mould, vulcanizing the rubber material in the mould at the high temperature of 200 ℃ for 75 seconds, and demoulding to obtain the novel composite silicone rubber label.
The silane coupling agent kh560 is a colorless transparent liquid, and is used for caulks and sealants of polysulfide and polyurethane, adhesives for epoxy resins, filled or reinforced thermosetting resins, glass fiber adhesives, thermoplastic resins for inorganic filling or glass reinforcement, and the like, by utilizing its property of improving the dispersibility of a filler.
The tensile strength of the novel composite silicone rubber label obtained by the method is improved; the tensile strength of the common silicon rubber label is 8.5MPa, the tensile strength of the novel composite silicon rubber label is 8.9MPa, and the tensile strength is improved by 4.7 percent. Meanwhile, kh560 is adopted as a silane coupling agent, so that the dispersity of the filler can be better improved, and the processability of the novel silicone rubber is improved.
Example 3:
mixing silicone rubber compound ZH2650, thermoplastic elastomer RTPU5770, compatilizer silane coupling agent kh550, porous organosilicon nano filler and the like according to the mass percentage of 72: adding the mixture into an internal mixer at a ratio of 26:1:1, heating to 180 ℃ at a speed of 8 ℃/min, and mixing and refining at 180 ℃ for 40min to obtain novel silicon rubber; putting the black color paste, a vulcanizing agent and novel silicon rubber into a double-rod rubber mixing mill according to the mass percentage of 1:2:97, and mixing for 3min to obtain a rubber material; and (3) carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips, then placing the rubber material strips into a vulcanizing machine through a mould, vulcanizing the rubber material in the mould at the high temperature of 200 ℃ for 75 seconds, and demoulding to obtain the novel composite silicone rubber label.
The RTPU5770 is a thermoplastic polyurethane. The RTPU5770 has excellent abrasion resistance and good biocompatibility as compared with general elastomers. The thermoplastic polyurethane is a novel environment-friendly material, has excellent performance, can be used in all places where polyvinyl chloride and polyurethane can be used, and is also internationally called as a green environment-friendly material.
The tensile strength of the novel composite silicone rubber label obtained by the method is improved; the tensile strength of the common silicon rubber label is 8.5MPa, the tensile strength of the novel composite silicon rubber label is 11.5MPa, and the tensile strength is improved by 35.3 percent. Meanwhile, the RTPU5770 is used as a thermoplastic elastomer, so that the wear resistance of the novel composite silicone rubber label is improved, and the novel composite silicone rubber label is more brittle and harder and is more environment-friendly.
Example 4:
mixing silicone rubber compound ZH2650, thermoplastic elastomer RPET, compatilizer silane coupling agent kh550, porous organosilicon nano filler and the like according to the mass percentage of 72: adding the mixture into an internal mixer at a ratio of 26:1:1, heating to 180 ℃ at a speed of 12 ℃/min, and mixing and refining the mixture at 180 ℃ for 20min to obtain novel silicon rubber; putting the black color paste, a vulcanizing agent and novel silicon rubber into a double-rod rubber mixing mill according to the mass percentage of 1:2:97, and mixing for 3min to obtain a rubber material; and (3) carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips, then placing the rubber material strips into a vulcanizing machine through a mould, vulcanizing the rubber material in the mould at the high temperature of 200 ℃ for 75 seconds, and demoulding to obtain the novel composite silicone rubber label.
The RPET is polyethylene terephthalate. Polyethylene terephthalate has an advantage of good oil resistance.
The tensile strength of the novel composite silicone rubber label obtained by the method is improved; the tensile strength of the common silicon rubber label is 8.5MPa, the tensile strength of the novel composite silicon rubber label is 9.1MPa, and the tensile strength is improved by 7 percent. Meanwhile, the RPET is used as the thermoplastic elastomer, so that the oil resistance of the novel composite silicone rubber label is improved, and the flexibility of the novel composite silicone rubber label is improved.
Example 5:
mixing silicone rubber compound ZH2650, thermoplastic elastomer PE, compatilizer silane coupling agent kh550, porous organosilicon nano filler and the like in percentage by mass of 72: adding the mixture into an internal mixer at a ratio of 26:1:1, heating to 180 ℃ at a speed of 12 ℃/min, and mixing and refining the mixture at 180 ℃ for 20min to obtain novel silicon rubber; putting the black color paste, a vulcanizing agent and novel silicon rubber into a double-rod rubber mixing mill according to the mass percentage of 1:2:97, and mixing for 3min to obtain a rubber material; and (3) carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips, then placing the rubber material strips into a vulcanizing machine through a mould, vulcanizing the rubber material in the mould at the high temperature of 200 ℃ for 75 seconds, and demoulding to obtain the novel composite silicone rubber label.
PE is polyethylene. The polyethylene is a thermoplastic resin prepared by polymerizing ethylene, has excellent low-temperature resistance (the lowest use temperature can reach-100 to-70 ℃), and has good chemical stability.
The tensile strength of the novel composite silicone rubber label obtained by the method is improved; the tensile strength of the common silicon rubber label is 8.5MPa, the tensile strength of the novel composite silicon rubber label is 8.7MPa, and the tensile strength is improved by 2.3 percent. Meanwhile, the PE is used as the thermoplastic elastomer, so that the low temperature resistance of the novel composite silicone rubber label is improved.
Example 6:
mixing silicon rubber compound ZH2650, thermoplastic elastomer RTPU, compatilizer silane coupling agent kh550, porous organosilicon nano filler and the like by the mass percentage of 80: adding the mixture into an internal mixer at a ratio of 18:1:1, heating to 180 ℃ at a speed of 8 ℃/min, and mixing and refining at 180 ℃ for 40min to obtain novel silicon rubber; putting the black color paste, a vulcanizing agent and novel silicon rubber into a double-rod rubber mixing mill according to the mass percentage of 1:3:96, and mixing for 3min to obtain a rubber material; and (3) carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips, then placing the rubber material strips into a vulcanizing machine through a mould, vulcanizing the rubber material in the mould at the high temperature of 200 ℃ for 75 seconds, and demoulding to obtain the novel composite silicone rubber label.
The silane coupling agent KH550 is soluble in organic solvent, can greatly improve the dry and wet shear strength of the reinforced plastic and improve the wettability and dispersibility of the filler in the polymer.
The tensile strength of the novel composite silicone rubber label obtained by the method is improved; the tensile strength of the common silicon rubber label is 8.5MPa, the tensile strength of the novel composite silicon rubber label is 15.5MPa, and the tensile strength is improved by 82.4 percent. And meanwhile, the kh550 is adopted as a silane coupling agent, so that the shearing strength of the novel composite silicone rubber label is improved, and the novel composite silicone rubber label is harder.
Example 7:
mixing silicone rubber compound ZH2650, thermoplastic elastomer RTPU, compatilizer silane coupling agent kh550, porous organosilicon nano filler and the like in a mass percentage of 60: adding the mixture into an internal mixer at a ratio of 38:1:1, heating to 180 ℃ at a speed of 12 ℃/min, and mixing and refining the mixture at 180 ℃ for 20min to obtain novel silicon rubber; putting the black color paste, a vulcanizing agent and novel silicon rubber into a double-rod rubber mixing mill according to the mass percentage of 1:2:97, and mixing for 3min to obtain a rubber material; and (3) carrying out strip division operation on the rubber material by using a strip dividing machine to obtain rubber material strips, then placing the rubber material strips into a vulcanizing machine through a mould, vulcanizing the rubber material in the mould at the high temperature of 200 ℃ for 75 seconds, and demoulding to obtain the novel composite silicone rubber label.
The tensile strength of the novel composite silicone rubber label obtained by the method is improved; the tensile strength of the common silicon rubber label is 8.5MPa, the tensile strength of the novel composite silicon rubber label is 23.2MPa, and the tensile strength is improved by 173 percent.
By combining the embodiment, the tensile strength of the novel composite silicone rubber label prepared by the preparation method of the novel composite silicone rubber label provided by the invention is improved compared with that of a common silicone rubber label.
The above examples show that: three silane coupling agents of KH550, KH907 and KH560 are used as compatilizers of a TPU/SIR blending system, compatibility of two phases is improved, so that mechanical properties, oil resistance, bonding properties and the like of the elastomer are improved, and influences of the silane coupling agents on TPV (thermoplastic vulcanizate) properties are compared. The tensile strength of the elastomer added with KH550 and KH907 is increased and then decreased, and the tensile strength of the elastomer added with KH560 is decreased and then increased and then decreased. Compared with the improvement degree of the three on the compatibility of the blending system, the KH550 has the most obvious effect. When the silicon-containing polyurethane compatibilizer is added into a certain amount, the mechanical property of the blend is optimal.
The silicon rubber is very soft and has lower hardness, the pure thermoplastic polyurethane has higher hardness, and when the silicon rubber and the pure thermoplastic polyurethane are blended, the hardness of the blended material is obviously lower than that of the pure thermoplastic polyurethane; within certain limits, the hardness is progressively reduced as the compatibilizer content of the TPU/silicone blend is increased.
The porous organosilicon nano filler has a large influence on the composite material, and the brittleness of the composite material is increased and the tensile strength is gradually reduced along with the increase of the content.
The novel silicon rubber takes a silicon rubber master batch and a thermoplastic elastomer as main components, and is matched with a compatilizer and a nano filler, and the components are matched according to the dosage. The silicon rubber has good high and low temperature resistance, weather aging resistance, excellent electrical property, special surface property and inertia. The thermoplastic elastomer has excellent performance, wide hardness range, excellent tensile property, antiskid, wear resistance and weather resistance and simple forming and processing. Under the synergistic effect of the components, the silicone rubber and the thermoplastic elastomer are compounded and modified to manufacture the novel high-performance composite silicone rubber label. The novel composite silicon rubber label has the advantages of wear resistance, high strength, oil resistance, weather resistance, hydrophobicity and chemical stability. The problem of among the prior art label suture easy fracture, tensile easy fracture, easy oil that produces is solved.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. The novel silicon rubber is characterized by comprising the following components in parts by mass:
wherein the thermoplastic elastomer is one or a mixture of more of PP, TPU, PE, PET and ABS materials; the compatilizer is one or a mixture of more of silane coupling agents kh550, kh907 and kh 560; the nano filler is a porous organic silicon material.
2. The novel silicone rubber according to claim 1, wherein the addition amounts of the silicone rubber masterbatch, the thermoplastic elastomer, the compatibilizer, and the nanofiller are 70 to 72 parts, 26 to 28 parts, 1 part, and 1 part, respectively, by mass; the thermoplastic elastomer is RTPU5770, and the compatilizer is a silane coupling agent kh 550.
3. The novel silicone rubber according to claim 1, wherein the addition amounts of the silicone rubber masterbatch, the thermoplastic elastomer, the compatibilizer, and the nanofiller are 55 to 65 parts, 33 to 43 parts, 1 part, and 1 part, respectively, by mass; the thermoplastic elastomer is RTPU, and the compatilizer is a silane coupling agent kh 550.
4. The novel silicone rubber according to claim 1, wherein the addition amounts of the silicone rubber masterbatch, the thermoplastic elastomer, the compatibilizer, and the nanofiller are 75 to 80 parts, 18 to 23 parts, 1 part, and 1 part, respectively, by mass; the thermoplastic elastomer is RTPU, and the compatilizer is a silane coupling agent kh 550.
5. The manufacturing method of the novel composite silicon rubber label is characterized by comprising the following steps of:
adding the silicone rubber masterbatch, the thermoplastic elastomer, the compatilizer and the nano filler into an internal mixer according to a certain proportion for mixing rubber to obtain novel silicone rubber; wherein the rubber mixing temperature is 160-180 ℃, and the rubber mixing time is 0.5-1.5 h; the heating speed is 6-15 ℃/min during rubber mixing;
sequentially putting the color paste, the vulcanizing agent and the novel silicon rubber on a double-rod rubber mixing mill to be mixed with the rubber to obtain a rubber material; wherein, the novel composite silicone rubber accounts for 96-98 parts by mass, the color paste accounts for 1-2 parts by mass, and the vulcanizing agent accounts for 2-3 parts by mass;
carrying out slitting operation on the rubber material by using a slitting machine to obtain rubber material slitting;
placing the rubber strips into a vulcanizing machine through a mold, vulcanizing the rubber strips in the mold at high temperature, and demolding to obtain the novel composite silicone rubber label; wherein the vulcanizing time is 70-110 seconds, and the vulcanizing temperature is 180-200 ℃;
the silicone rubber master batch is the silicone rubber master batch described in any one of claims 1-4.
6. The method of manufacturing according to claim 5,
in the steps: the adding proportion of the color paste, the vulcanizing agent and the novel silicon rubber is 1:2:97, the rubber mixing temperature is 160-180 ℃, the rubber mixing time is 1-1.5h, and the temperature rise speed during rubber mixing is 6-8 ℃/min.
7. The method of manufacturing according to claim 5,
in the steps: the adding proportion of the color paste, the vulcanizing agent and the novel silicon rubber is 1:2:97, the rubber mixing temperature is 160-180 ℃, the rubber mixing time is 0.5-1h, and the temperature rise speed during rubber mixing is 10-12 ℃/min.
8. The method of manufacturing according to claim 5,
in the steps: the adding proportion of the color paste, the vulcanizing agent and the novel silicon rubber is 1:3:96, the rubber mixing temperature is 160-180 ℃, the rubber mixing time is 1-1.5h, and the temperature rise speed during rubber mixing is 6-8 ℃/min.
9. The manufacturing method of claim 5, wherein the color paste, the vulcanizing agent and the novel silicone rubber are added at a ratio of 1:2:97, the rubber mixing temperature is 180 ℃, the rubber mixing time is 0.58h, the temperature rise rate during rubber mixing is 12 ℃/min, the vulcanization time is 75 seconds, and the vulcanization temperature is 200 ℃.
10. A novel composite silicone rubber label characterized by being produced by the production method according to any one of claims 5 to 9.
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Application publication date: 20211203 |