Elastomer used for producing drip irrigation zone joint strip and producing method

Abstract

The invention discloses an elastomer used for producing a drip irrigation zone joint strip and a producing method. The elastomer is characterized by being prepared from, by weight percentage, 65-75% of polyethylene PE, 15-25% of ethylene-vinyl acetate copolymer EVA and 8-12% of thermoplast elatomer TPE, wherein solubility parameters SP of the three materials are close; through material mixing, melt blending and pelleting, macromolecular particles used for producing the drip irrigation zone joint strip are produced. Due to the fact that the elastomer is good in elasticity, soft and weather-proof, the produced joint strip is also good in elasticity, soft and weather-proof. In the drip irrigation application, the water-carrying capacity and the hydraulic pressure change reversely so that a good compensation effect can be achieved, and the situation that the output flow rate of an irrigation engineering maintains constant within a certain hydraulic pressure range is guaranteed; meanwhile, due to the fact that the elastomer is prone to bending in the laying process, the application channel and range are broadened, and especially the problem that claying is difficult in hills and mountainous areas which have long distances and large height differences is solved.

Description

technical field [0001] The invention relates to an improvement of raw materials for producing drip irrigation tape strips, in particular to an elastic body and a production method for producing drip irrigation tape strips, which are suitable for the production of drip irrigation tape strips with pressure compensation function. Background technique [0002] Drip tape stickers are a kind of embedded drippers in drip irrigation belts. Adjacent drippers are continuously extruded into a strip through special production equipment, which is called stickers. At present, the raw materials used in the production of stickers include: high-pressure polyethylene (LDPE) and linear polyethylene (LLDPE), which are mixed in a certain proportion to form composite plastic raw materials. Among them: high-pressure polyethylene (LDPE) is polymerized from ethylene-CH- under high pressure and high temperature, and its branched chains are more, which makes it have a certain degree of flexibility; li...

AI Technical Summary

Problems solved by technology

But the deficiencies of the stickers produced by this composite plastic raw material are: one, because the above-mentioned composite plastic raw materials have elasticity and softness, but the elasticity and softness are very general, so the stickers produced are also very general in elasticity, and the use performance is also very general. Very generally, the produced strips cannot achieve better compensation and self-closing anti-blocking performance. In the use of drip irrigation, the water pressure test shows that when the water pressure changes, the flow rate of the water outlet changes accordingly, and the amount of change is between 5% or more, and there is no function that the water outlet flow decreases as the water pressure increases, so the water outlet flow does not have the compensation function, or the compensation function is not obvious; the second is that the elasticity and softness of the sticker are also very general, Compared with the application, it still has a relatively large hardness, so the scope of application is limited, especially for long-distance laying and hilly and mountainous laying with large height differences, which is very difficult

[0003] It can be seen from the search that there is no report on the elastomer used for the production of drip irrigation tape with pressure compensation function, wide application range, and easy to lay in hills and mountainous areas.