200g Polyvinyl Alcohol (pva) Pva-224, Japan Kurary

US $220

Hong Kong, Hong Kong
Nov 4th

Open on mobile:
QR code

DESCRIPTION: *Package included: 200 grams Chemical name alcohol Polyvinyl, referred to as PVA. The main character of PVA is due to the molecular composition of the resin and the degree of polymerization and alcoholysis degree set. PVA is a water-soluble polymer with a very extensive use, has unique and strong adhesive, coating flexibility, smoothness, oil resistance, solvent resistance, protective colloid, gas denial, wear resistance and the special treatment of water resistance. Mainly used in textile warp sizing agent, fabric finishing agent, vinylon fiber raw materials; architectural decoration industry 107 glue, internal and external wall coating, adhesive; chemical industry used as polymeric emulsifier, dispersing agent and polyvinyl formal, acetal, butyral resin; paper industry with adhesive paper products; agriculture for soil improvement agent, pesticide adhesion synergistic agent and polyvinyl alcohol film; also can be used for cosmetics and high frequency quenching agent (1) water solubility: soluble in water, insoluble in almost all organic solvents. (2) the viscosity of the aqueous solution: the viscosity of the aqueous solution of PVA is changed due to the temperature of the degree of polymerization. The other water soluble polymers are lower than others. (3) formingproperties: PVA water solution is easy to form film, physical properties of the coating is better than that of tensile strength and abrasion resistance etc.. (4): PVA film is lower than the hygroscopicity hygroscopicity, as the humidity changes than other smaller polymer aqueous solution. (5) drug resistant oil resistance: PVA has very strong tolerance to weak acid and weak base. In addition, is better than oil resistance. First, "uses" 1 fiber industry in the slurry and finishing agent. 2 adhesive / adhesive. 3 paper processing. 4 emulsifying stabilizer. 5 film and sponge forming agent. Two, dissolution method: PVA into the water, directly into the steam, the edge of the edge of the stir dissolved. Generally speaking, the water is wet below the room temperature of water poured in the dissolution of the tank, while the edge of the mixing slowly put into PVA. When the water is stirred, the liquid temperature is heated to 95 degrees C. 30-60 minutes after heating, will be completely dissolved. But some sapond PVA is easy to produce cluster in solution, so please pay attention to the following: A. when the water temperature to keep below 25 C. B.PVA the amount of material to try to do a little slow. C. after feeding, in accordance with the same temperature after full mixing 10--15 minutes to start heating. In the process of heating also continue to stir. Three, solution storage: The PVA water solution has no chemical changes in the long term, but it is likely to be in the form of water quality. Also the extension of the time of the viscosity may increase. A. the moldy measures: the organic nitrogen, organic iodine, cationic surfactant system, inhibitor of the PVA 0.01--0.05%. B. countermeasures for thickening: completely alcoholysis PVA in high concentration aqueous solution, easy thickening and recommendation edge insulation in the custody of 50-70 DEG C. Four, custody, use the attention: A. cola PVA to avoid high temperature and humidity of the site. B. because of the easy to slip away from the powder and cause the accident, so please put together recycling. PAYMENT: We accept Paypal and credit card. SHIPPING: We ship to US and worldwide. To US: by E-packet, which is a joint programme between Ebay and post office, especially fast, 7-12 days arrival. WARRANTY: 30 days money back or send a replacement.