Pinch PPR raj muaj qhov nyuaj heev, thiab nws tuaj yeem yooj yim pinched rau hauv lub raj deformed, uas tsis yog PPR raj.
Touch Whether the texture is fine and the particles are uniform. At present, PPR tubes on the market mainly have several colors of white, gray and green. Generally, recycled plastics cannot be made into white, so consumers often think that white is the best. In fact, this view is rather one-sided. With the update and improvement of technology, color is not the standard for distinguishing the quality of PPR tubes. Whether the tube is good or bad, it seems that it can't solve the problem. If you touch it, the rough particles are likely to be mixed with other impurities.
Ntxub tus ntxhiab. Cov khoom tseem ceeb ntawm PPR yeeb nkab yog polypropylene. Cov kav dej zoo tsis muaj ntxhiab tsw, thiab cov kav dej tsis zoo muaj ntxhiab tsw txawv. Nws zoo li yuav tsum tau muab sib xyaw nrog polyethylene tsis yog polypropylene.
Hlawv Nws yog intuitive heev thiab pab tau heev. PPR cov kav dej sib xyaw nrog cov yas rov ua dua tshiab thiab lwm yam khoom tsis huv hauv cov khoom siv raw yuav tawm cov pa luam yeeb dub thiab muaj cov ntxhiab tsw phem; Cov ntaub ntawv zoo yuav tsis tawm cov pa luam yeeb dub thiab tsw qab tom qab hlawv, thiab cov kua molten tseem yuav huv heev tom qab hlawv.
A good PPR tube has good "resilience", and it is not a good PPR tube if it is too easy to smash. However, strong hardness does not mean good elasticity. Consumers will have doubts about PPR tubes that cannot be broken. Because some unscrupulous manufacturers increase the hardness of pipes by adding too much calcium carbonate and other impurities, such pipes are prone to brittle cracks after a long time.