Intro to P+R Plastic Rubber Keypad with Key Cap & Button Cover Manufacturing Process

What is P+R Plastic Rubber Keypad

P + R Plastic Keypad also called as P+R Keypad, Plastic Rubber Keypad, Plastic Rubber Keypad and Plastic Key Cap.P refers to the Plastic (Plastic), R is refers to the Rubber (Rubber). It is a keypad made of plastic and rubber.

P+R rubber keypad mainly consists of plastic key cap in combination with silicone button pad , combining the advantages of plastic keycap with the elastomeric and properties of the silicone rubber.The plastic key cap provides good protection and durability, and the silicone button pad provides good elasticity and tactile feeling for the whole keypad.

P + R rubber keypad are normally used in electronic dictionary, learning machine, mobile phone, bank password device, tablet computer, e-book and other electronic and electrical products.

P + R Plastic Keypad Manufacturing Process

-Combine plastic key cap with silicone button pad by assembly.

-Combine plastic key cap with silicone button pad by glue.

The manufacturing process are the same in both methods. Silicone button pad and plastic keycap are molded respectively.Silicone button pad are produce by compression molding and plastic keycap are molded by plastic injection molding. 

Plastic key pap and silicone button pad base are processed and brushed with treatment agent, then the complete plastic keypad (P+R) keyboard is produced by appropriate adhesive and pressing processes in the assembly of the fixture.

                                            Combine the plastic key cap with silicone button pad by assembly

                                                          Combine the plastic key cap with silicone button pad by glue

Note:Epoxy coated silicone button pad also has hard surface, which is suitable for outdoor device.

How to Achieve Characters Of Plastic Key Cap

-Laser Etching.The same as silicone button pad with backlight effect.When you need to abtain the backilit effect of plastic cap, laser etching process is the best choice.The cost is higher.

-Silkscreen Printing.Without backlight effect and can be multi-colored.

Common plastic key cap material include ABS, PC, PMMA, ABS+PC.Most designer would choose ABS and PMMA for plastic key cap. 

Compared with ABS P+R keypad, Acrylic PMMA keyboard is more easy and has many advantages:  

1.Save mold cost. Acrylic keycap can be processed with different technology: silkscreen printing,laser etching by different thickness plates. Then cut the plate into different keycaps shapes. The thickness of acrylic plates can be 0.5MM, 0.8MM, 1.0MM, 1.5MM, 2.0MM, 2.5MM and so on. Customer can choose according to their requirments.

2.Beautiful appearance. Acrylic surface effect can be as bright as crystal, there is no need to spray bright UV, which can also save cost.

3.Smooth surface. Acrylic keycaps will not shrink, the surface flatness is good. And it is easy to control the dimension of acrylic keycaps.

4.Durable service life. Print the color and characters on the back of acrylic , so that the printed character will not be erased during application.

Xiamen Better Silicone Rubber Co.,ltd is specialized on producing different material of plastic keypad P+R keyboard. We have experienced technical and management team. Not only we can provide moldability analysis, manufacturability analysis based on your products, but also we provide design support.