Nitrile Rubber Encyclopedia

Oil-resistant rubber diaphragm production points (2)

Create Date:2019-06-27 08:38:24Click volume:81
Oil-resistant rubber diaphragm production points (2)

When producing nitrile rubber or nitrile reclaimed rubber to produce oil-resistant rubber diaphragm, master the production points of oil-resistant rubber diaphragm, which can reduce the defective rate of rubber diaphragm, improve the production efficiency of rubber diaphragm and avoid unnecessary loss. Yesterday Xiaobian has already discussed with you the requirements of the nitrile oil-resistant rubber diaphragm for reclaimed rubber, the plasticity and the processing points of the skeleton material. Xiaobian today and everyone continue to share other production points of the oil-resistant rubber diaphragm.

4. Adhesive method when using fiber fabric as a skeleton material

Fiber fabric is a commonly used skeleton material for nitrile oil resistant rubber diaphragm. The adhesion between the rubber and the rubber directly affects the sealing effect and service life of the rubber diaphragm. Direct bonding is one of the commonly used methods. In general, an appropriate amount of RE adhesive and RH adhesive can be directly added to the nitrile rubber, the nitrile reclaimed rubber or the nitrile rubber/recycled rubber blending compound. In the actual production process, the RE adhesive can be firstly added into the directly bonded rubber, and directly rubbed on the surface of the fiber fabric or glued to ensure the fiber fabric and the nitrile rubber compound. Inter-adhesion; the nitrile oil-resistant separators, which usually select the direct bonding method, generally do not require the surface material to be pretreated with a matrix material using a resin.

5. When choosing RE adhesive to make masterbatch, pay attention to mixing skills.

The nitrile rubber is directly bonded to the fiber fabric, and the process of making the RE adhesive into the masterbatch is usually carried out in an internal mixer. When the kneading is performed, the temperature of the roller needs to be controlled at 100 ° C or higher, preferably about 120 ° C; PE When the master batch is kneaded in an open mill, when the temperature of the rubber compound is about 55 ° C, the RE masterbatch after the kneading must be heat-treated at a temperature of about 140 ° C for 30 minutes.

6. Pay attention to cleanliness when oil-resistant rubber diaphragm is formed

When producing nitrile rubber or nitrile reclaimed rubber to produce oil-resistant rubber diaphragm, it is necessary to pay attention to the degree of cleanness of the rubber tape. The surface of the semi-finished product should not contain oil and other impurities. The nitrile rubber compound should be uniformly regenerated before the molding to ensure no bubble generation. Cut and use a pressure roller to roll out the air.

7. Pay attention to the upper die when the oil resistant rubber diaphragm is closed.

The mold clamping process is carried out in a mold clamping machine and requires a certain pressure to perform the mold clamping operation. Under normal circumstances, in order to avoid the rubber sheet being entangled in the rubber, the nitrile oil-resistant rubber diaphragm should be added with a low pressure and then added with a high pressure to avoid crushing the thin rubber diaphragm; after adding the low pressure, immediately release the pressure and vent several times to avoid the rubber. The diaphragm generates bubbles, which are then vulcanized after several deflations.

When using a nitrile rubber or a nitrile reclaimed rubber to produce a rubber diaphragm, in order to increase the amount of reclaimed rubber and reduce the production cost, the rubber product manufacturer needs to properly adjust the nitrile-resistant oil-resistant rubber diaphragm formulation, and improve the performance of the oil-resistant rubber diaphragm product by compounding with the compounding agent, further improving Recycled rubber dosage, reducing more production costs.