Radiation cross-linked polyethylene heat shrinkable wrap and preparation method thereof
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A radiation cross-linking, heat shrinkable tape technology, applied in the direction of heat activated films/sheets, mineral oil hydrocarbon copolymer adhesives, unsaturated ether copolymer adhesives, etc. It can improve the low temperature bonding performance, high bonding force and excellent low temperature bonding strength.
Active Publication Date: 2020-03-27
成都环宇热缩材料有限公司
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[0004] As the adhesive for connecting polyolefin substrates and pipes, hot-melt adhesives play a decisive role in the sealing effect of pipes. Since the embrittlement temperature of traditional hot-melt adhesives is only about -15°C, when it is
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preparation example 1
[0034] Preparation Example 1 of Modified Pottery Clay: ①Add 50% of its weight to the pottery clay with 10wt% dilute hydrochloric acid solution, soak it for 2 hours, then rinse it with deionized water until the pH value of the rinse solution is 7, then put the acidified The potter's clay was dried at a temperature of 120°C for 6 hours to obtain acidified pottery clay;
[0035]②Add 4% ethyl cellulose, 3% ethylene glycol dimethacrylate, 3% sodium lignosulfonate, 1% polyvinylpyrrolidone, 0.1% aminopropyl to the acidified clay Trimethoxysilane was dispersed at a high speed of 1000r / min for 10 minutes, kept at a temperature of 110°C for 40 minutes, and cooled to 20°C to obtain modified clay.
preparation example 2
[0036] Preparation Example 2 of Modified Pottery Clay: 1. Add 50% of its weight to the pottery clay with 10wt% dilute hydrochloric acid solution, soak it for 2.5h, then rinse it with deionized water until the pH value of the rinse solution is 7, then acidify The final potter's clay was dried at a temperature of 120° C. for 6 hours to obtain acidified pottery clay;
[0037] ② Add 6% ethyl cellulose, 4% ethylene glycol dimethacrylate, 4% sodium lignosulfonate, 1.5% polyvinylpyrrolidone, 0.25% aminopropyl to the acidified clay Trimethoxysilane was dispersed at a speed of 1000r / min for 15 minutes, kept at a temperature of 115°C for 50 minutes, and cooled to 20°C to obtain modified clay.
preparation example 3
[0038] Preparation Example 3 of Modified Pottery Clay: ① Add 50% of its weight to the pottery clay with a 10wt% dilute hydrochloric acid solution, soak it for 3 hours, then rinse it with deionized water until the pH value of the rinse solution is 7, then acidify the clay The potter's clay was dried at a temperature of 120°C for 6 hours to obtain acidified pottery clay;
[0039] ②Add 8% ethyl cellulose, 5% ethylene glycol dimethacrylate, 5% sodium lignosulfonate, 2% polyvinylpyrrolidone, 0.4% aminopropyl to the acidified clay Trimethoxysilane was dispersed at a high speed of 1000r / min for 20 minutes, kept at a temperature of 120°C for 60 minutes, and cooled to 20°C to obtain modified clay.
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Abstract
The invention discloses a radiation cross-linked polyethylene heat shrinkable wrap and a preparation method thereof, and the key points of the technical scheme are as follows: the radiation cross-linked polyethylene heat shrinkable wrap comprises a radiation cross-linked polyethylene heat shrinkable substrate and a hot melt adhesive film; the hot melt adhesive film is prepared from the following components: an ethylene-ethyl acrylate copolymer, a styrene-isoprene-styrene block copolymer, a polymethyl vinyl ether/maleic anhydride copolymer, a tackifying resin, 6 to 10 parts of a modified argil,a cold-resistant plasticizer, an antioxidant, a lubricant and a silane coupling agent; wherein the modified argil is prepared by acidifying and modifying argil. According to the radiation cross-linked polyethylene heat shrinkable wrap, the ethylene-ethyl acrylate copolymer, the styrene-isoprene-styrene block copolymer and the polymethyl vinyl ether/maleic anhydride copolymer are used as main rawmaterials, and the tackifying resin, the modified argil and the cold-resistant plasticizer are matched, so that the cold resistance of the hot melt adhesive can be improved, and the hot melt adhesivehas excellent low-temperature bonding strength.
Description
technical field [0001] The invention relates to the technical field of pipe jointing materials, in particular to a heat-shrinkable radiation-crosslinked polyethylene tape and a preparation method thereof. Background technique [0002] Radiation crosslinked polyethylene heat shrinkable tape is composed of radiation crosslinked polyolefin substrate and hot melt adhesive. Hot melt adhesive can form good adhesion with polyolefin substrate, steel pipe surface and epoxy coating. It is mainly used in oil fields Anti-corrosion joints of various steel pipes such as chemical, heating, gas, etc.; during construction, wrap the heat shrinkable tape on the joint, and heat evenly to cause the heat shrinkable tape to shrink radially, and the inner layer of hot melt adhesive melts , so that the heat-shrinkable tape is tightly bonded to the surface of the joint pipe body and the anti-corrosion layer of the pipe body to play the role of sealing and anti-corrosion. [0003] In the prior art, t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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