{"id":375,"date":"2026-01-22T02:09:06","date_gmt":"2026-01-22T02:09:06","guid":{"rendered":"https:\/\/www.jccncmachining.com\/?post_type=material&p=375"},"modified":"2026-03-17T17:55:26","modified_gmt":"2026-03-17T09:55:26","slug":"pmma-acrylic","status":"publish","type":"material","link":"https:\/\/www.jccncmachining.com\/zh_hk\/materials\/pmma-acrylic\/","title":{"rendered":"PMMA (Acrylic)"},"content":{"rendered":"

<\/p>\n

\n

Available PMMA (Acrylic) Grades<\/h3>\n\n\n\n\n\n\n\n\n
Grade<\/th>\nCommon Name<\/th>\nKey Characteristics<\/th>\nTypical Applications<\/th>\n<\/tr>\n<\/thead>\n
Cast Acrylic<\/strong><\/td>\nPlexiglass \/ Lucite<\/td>\nHighest optical clarity, lower internal stress, better chemical resistance. The preferred grade for machining.<\/td>\nOptical lenses, medical manifolds, high-end display cases, awards.<\/td>\n<\/tr>\n
Extruded Acrylic<\/strong><\/td>\nStandard PMMA<\/td>\nMore uniform thickness but higher internal stress. Lower melting point makes it “gummier” to machine.<\/td>\nSignage, lighting fixtures, simple screens.<\/td>\n<\/tr>\n
Impact Modified Acrylic<\/strong><\/td>\nImpact PMMA<\/td>\nBlended with elastomers to improve toughness and reduce brittleness, slightly reducing clarity.<\/td>\nProtective shields, skylights, outdoor displays.<\/td>\n<\/tr>\n
Translucent\/Tinted<\/strong><\/td>\nColored Acrylic<\/td>\nAvailable in various colors and opacities (smoked, frosted) for light diffusion.<\/td>\nAutomotive taillights, architectural lighting, privacy screens.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

\n

PMMA Machining Capabilities<\/h3>\n\n\n\n\n\n\n\n\n
Capability<\/th>\nTechnical Description<\/th>\nJucheng Advantage<\/th>\n<\/tr>\n<\/thead>\n
Vapor Polishing<\/strong><\/td>\nExposing the machined surface to solvent vapor to flow the material and create a crystal-clear finish.<\/td>\nWe achieve optical transparency on complex internal channels where hand polishing is impossible.<\/td>\n<\/tr>\n
Diamond Turning<\/strong><\/td>\nUsing single-crystal diamond tools on ultra-precision lathes to cut mirror finishes directly.<\/td>\nProduces lens-quality surfaces without the need for extensive post-processing.<\/td>\n<\/tr>\n
Micro-Milling<\/strong><\/td>\nMachining fine grooves and patterns for light guides and LCD backlights.<\/td>\nHigh-speed spindles (20k+ RPM) ensure clean cuts on delicate features without chipping.<\/td>\n<\/tr>\n
Stress Relieving<\/strong><\/td>\nAnnealing acrylic parts in ovens to remove machining stresses.<\/td>\nPrevents “crazing” (surface spider-web cracks) when the part is exposed to solvents or glues later.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n

<\/p>\n

\n

Fabrication Guidelines for PMMA<\/h3>\n

Coolant is Critical:<\/strong>
\nAcrylic is sensitive to heat buildup. If it gets too hot, it melts and re-welds behind the cutter. We use air blast or water-soluble coolants to keep chips cool and brittle for ejection.<\/p>\n

Avoid Solvents:<\/strong>
\nNever clean machined acrylic with alcohol or standard solvents immediately after machining, as it will cause instant stress cracking. We use mild soap or specialized cleaners.<\/p>\n

Workholding:<\/strong>
\nAcrylic is brittle and will crack if clamped too tightly. Vacuum tables are the best method for holding flat sheets. For vices, we use soft jaws with gentle pressure.<\/p>\n

Drilling:<\/strong>
\nStandard drill bits can grab and crack acrylic upon exit. We use bits with a “dubbed” (flattened) cutting edge or specialized plastic drills with a 0-degree rake.<\/p>\n<\/div>\n

<\/p>\n

\n

Primary Application Industries<\/h3>\n

Lighting & Optics<\/strong>
\nKey Parts:<\/em> Light pipes, diffusers, lenses, reflectors.
\nWhy PMMA:<\/em> 92% light transmission and excellent UV resistance (doesn’t yellow like PC).<\/p>\n

Medical & Diagnostics<\/strong>
\nKey Parts:<\/em> Microfluidic chips, incubator parts, fluid manifolds.
\nWhy PMMA:<\/em> Optical clarity allows for visual inspection of fluid flow; biocompatible grades available.<\/p>\n

Displays & Signage<\/strong>
\nKey Parts:<\/em> POS display stands, museum cases, touch screen covers.
\nWhy PMMA:<\/em> Premium aesthetic look, high gloss, and easy to polish scratches out.<\/p>\n

Subsea & Marine<\/strong>
\nKey Parts:<\/em> Submersible windows, aquarium panels, pressure housings.
\nWhy PMMA:<\/em> Massive cast blocks can withstand high pressure while maintaining perfect visibility.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Available PMMA (Acrylic) Grades Grade Common Name Key Characteristics Typical Applications Cast Acrylic Plexiglass \/ Lucite Highest optical clarity, lower internal stress, better chemical resistance. The preferred grade for machining. Optical lenses, medical manifolds, high-end display cases, awards. Extruded Acrylic Standard PMMA More uniform thickness but higher internal stress. Lower melting point makes it “gummier” […]<\/p>\n","protected":false},"featured_media":376,"template":"","meta":[],"material_type":[8],"material_attribute":[],"application_feature":[24],"machining_process":[25,26],"class_list":["post-375","material","type-material","status-publish","has-post-thumbnail","hentry","material_type-plastic","application_feature-transparent"],"_links":{"self":[{"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/material\/375","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/material"}],"about":[{"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/types\/material"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/media\/376"}],"wp:attachment":[{"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/media?parent=375"}],"wp:term":[{"taxonomy":"material_type","embeddable":true,"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/material_type?post=375"},{"taxonomy":"material_attribute","embeddable":true,"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/material_attribute?post=375"},{"taxonomy":"application_feature","embeddable":true,"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/application_feature?post=375"},{"taxonomy":"machining_process","embeddable":true,"href":"https:\/\/www.jccncmachining.com\/zh_hk\/wp-json\/wp\/v2\/machining_process?post=375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}