保护膜按照用途可以分为数码产品保护膜，汽车保护膜，家用保护膜，食品保鲜保护膜等。随着手机等数码产品在中国的普及，保护膜已经慢慢的成为的一种统称，而其在屏幕保护膜领域的功能也是五花八门，***早高清防刮，到现今香港glauke,
180 度和ok8功能型保护膜的受宠。材料从***早的pp材料到现今流行的ar材质，中间经历了5年多的发展，慢慢的被广大手机群体所接受。保护膜按应用范围分，可应用在以下一些领域:金属产品表面、涂层金属产品表面、塑料产品表面、汽车产品表面、电子产品表面、标牌产品表面、型材产品表面、及其它产品表面。pet材质
保护膜是市面上***常见的一种保护贴，手机和平板电脑用的就是这三层pet保护膜。化学名为聚脂薄膜。特点是质地比较硬，较耐刮，长时间使用也不会像pvc材料那样翻黄出油 。但是一般pet的保护膜都是依靠静电吸附的，比较容易起泡和脱落，不过即便脱落了在清水中洗一下还可以重复使用。pet材质保护膜的价格比pvc的贵不少。采用pet 物料保护贴贴做工与包装比较精美，有专门为热买手机型号来订做的保护贴，不需要裁剪即可直接使用。
ar材质
保护贴则是市面上已知的的一种屏幕保护贴。ar是一种合成材质，一般分三层，硅胶为吸附层，pet为中间层，外层为特殊处理层.特殊处理层一般又分成两种，ag处理层和hc处理层，ag是抗眩光处理，磨砂型保护膜就是采用了这种处理方式。hc是硬度处理，是高透光型保护膜所用的处理方式.这种屏幕保护膜的特点是屏幕不反光，透光度高 (95％以上)，不会影响屏幕的显示效果。材质表面经过特殊的工艺处理，本身质地较柔软，具有抗摩擦与抗刮能力强.长时间使用也不会出现刮痕，黏贴上采用化学材质硅胶吸附在上，因此不会对屏幕本身造成伤害，撕下后不会留下印记，而且也能够清洗过后重复使用。价格较pet材质贵。
pe材质
主要原材料是 ，材质比较柔软，有一定的拉伸性。一般厚度为0.05mm-0.15mm,其粘性根据使用要求不同从5g-500g不等(粘性方面国内和国外划分不同，比如韩国膜的200克相当于国内的80克左右)。pe材质的保护膜项目下分还有静电膜、网纹膜等。静电膜就是以静电吸附力为粘力，是完全没有胶水的一种保护膜，当然粘性相对较弱，主要应用于电镀等表面保护。网纹膜就是表面有很多网格的一种保护膜，这种保护膜透气性比较好，粘贴效果比较美观，不像平纹膜会留下气泡。
opp的保护膜从外观上看比较接近于pet保护膜，其硬度较大，有一定的阻燃性，但是其粘贴使用效果较差，一般市场上很少使用。
oca材的保护膜从外观上看跟其它的材质没有什么区别，但是oca材质的保护膜是生产于日本，其现在在苹果手机上应用***多，其在光度与硬度上都比其它的材质好，所以oca是现在手机保护膜***流行的材质。
贴膜分类
1、按性质类:涂胶膜、自粘膜
1)、涂胶膜粘着剂 的种类有溶剂 型橡胶粘着剂 、溶剂 型丙烯酸 粘着剂 、水性丙烯酸 粘着剂 、以及硅酮 粘着剂 。其中又以水性丙烯酸 粘着剂 是***普遍应用此类产品，它可容易调整粘着力，并且透明性和耐候性佳。
2)、自粘膜一般是以共挤的方式生产，而其自粘层一般为eva、超低密度聚乙烯或聚烯烃塑性体树脂为主，此种结构形式亦渐渐成为市场的主流，因为它较涂胶膜具有较多的优点，如无残胶、提供稳定的粘着力、降低使用者成本以及对保护膜制造商创造较高利润。
2、按胶系分类
橡胶系:天然橡胶、丁苯 橡胶、;
橡胶系保护膜特点:柔软，能较快达到***终粘性;分子流动性好;相对易撕;天然橡胶耐老化性能差;价格较高。
系:乳液型(水性)、溶剂 型;
丙烯酸 酯类胶系保护膜特点
1)、乳液型丙烯酸 (水性丙烯酸 ):流动性相对较差，达到***终粘性时间相对较长，低档保护膜粘性会随时间的增长而增加粘性，环保性材料，耐候性较好，可快速撕膜;
2)、溶剂 性丙烯酸 :难以达到高要求的环保标准，其他特性与乳剂 性丙烯酸 类似。
3、按基材分类
pe基材、pvc基材、pet基材、opp基材、其他
4、按保护膜市场分类
1)、传统保护膜:如镀锌钢板保护膜、彩色钢板保护膜、玻璃板或塑料片材保护膜等。此类传统保护膜多属附加价值较低之应用，对性能及晶点要求较低，且多为涂胶型保护膜。
2)、平面显示器用保护膜:应用范围包括平面显示器、tft-lcd 模块、背光模块、玻璃基板及各种光学组件如偏光板、彩色滤光片等。此类保护膜对粘度及晶点的控制有极高的要求，属高附加价值、高技术门坎之应用。
3)、高科技电子业用保护膜:如干膜(dry
film) 用或晶圆研磨制程所用之保护膜。此类保护膜通常需要于无尘室内生产，且对晶点的要求极为严苛。仅有极少数保护膜厂商具备足够的技术能力来达到这些要求
the protective film can be divided into digital
protective film, automobile protective film, household protective film【敏感词】food
preservation film.
with the popularity of cell phones【敏感词】other
digital products in china, protective film has slowly become a kind of generally
referred to as the screen protective film,【敏感词】its function in the field of
screen protection film is multifarious, the earliest gao qingfang scraping, to
hong kong today glauke, 180 degrees【敏感词】favored ok8 functional protective
film.
materials from the earliest pp materials to
today's popular ar materials, in the middle of more than five years of
development, slowly being accepted by the majority of mobile phone
groups.
protective film according to the range of
application, can be used in the following areas: metal products surface, surface
coating of metal products, plastic products, automotive products, electronic
products surface, surface surface sign product, product surface profiles,【敏感词】
other products surface.
folding
pet material
the protective film is the most common type of
protective paste on the market,【敏感词】the phone【敏感词】tablet are used in this
three-layer pet protective film.
the chemical called polyester film.
the characteristic is texture is more hard,
more resistant to scraping, long time use also won't be like pvc material to
turn yellow oil.
but general pet's protective film relies on
electrostatic adsorption, it is easy to bubble【敏感词】fall off, but even if it
falls off in clean water can be reused.
the protective film of pet material is much
more expensive than pvc.
the pet material protection paste is made of
fine workmanship【敏感词】packaging, which is specially designed for the hot purchase
of mobile phone models, which can be used directly without cutting.
folded ar material
the protective paste is the best known screen
saver on the market.
ar is a kind of synthetic material, generally
three layers, the silica gel adsorption layer, pet for the middle layer, outer
layer for special treatment. special processing layer is usually divided into
two kinds, ag processing layer【敏感词】hc, ag is anti glare processing, grinding
sand mold coating is adopted this approach.
hc is hardness processing, high transmission
type protective film used in the treatment. the characteristics of this kind of
screen protection film is not reflective screen, high light transmittance (95％),
will not affect the screen display effect.
material surface through special craft
processing, itself a soft texture, has a strong resistance to friction【敏感词】
scratch resistance. used for a long time also won't appear scratches, paste on
the chemical material silica gel adsorption on a mobile phone screen, so as not
to harm the screen itself, tear off after won't leave a mark, but also can be
reused after cleaning.
the price is more expensive than the
pet.
folded pe material
the main raw material is lldpe, which is soft
and has a certain stretch.
generally, the thickness is 0.05mm - 0.15mm,
and the viscosity varies from 5g to 500g depending on the use requirement. (the
viscosity is different from domestic【敏感词】foreign, for example, 200 grams of
korean membrane is equivalent to about 80 grams of domestic product).
the protection film of pe material is divided
into the electrostatic film, the mesh film【敏感词】so on.
electrostatic film is a protective film with
electrostatic adsorption, which is completely without glue, which is of course
relatively weak【敏感词】is mainly used for surface protection such as
electroplating.
the diaphragm is a protective film with many
meshes on the surface. the protective film has a better air permeability【敏感词】is
more beautiful than the plain film.
folding opp material
the protective film is relatively close to the
pet protective film,【敏感词】its hardness is larger. it has certain flame
retardancy, but its paste is less effective【敏感词】is seldom used in general
market.
folding oca material
the protective film from the appearance to see
no difference with other material, but the oca material protective film is
produced in japan, its most used on apple mobile phone, now in its luminosity
and hardness is better than other materials, so the oca is now mobile phone
protective film of the most popular material.
film classification
1. properties: coated film【敏感词】self-mucosal
membrane
1) the kinds of adhesives coated with adhesive
film are solvent - based rubber adhesive, solvent - based acrylic adhesive,
water-based acrylic adhesive,【敏感词】silicone adhesive.
it is also the most commonly used in the
application of water-based acrylic adhesives, which can easily adjust the
adhesion【敏感词】the transparency【敏感词】weatherability.
2), since the mucous membrane usually took the
form of co-extrusion production,【敏感词】the adhesive layer is commonly eva, ultra
low density polyethylene【敏感词】polyolefin plastic resin as the main body, this kind
of structure form also gradually become the mainstream of the market, because it
is a film coating has more advantages, such as no glue residue, provide stable
adhesion, reduced cost of users【敏感词】create higher profits for protective film
manufacturers.
2. classification by glue
rubber system: natural rubber, styrene
butadiene rubber, synthetic rubber;
characteristics of rubber protection film: soft
and fast enough to achieve final adhesion;
molecular mobility;
relatively easy to tear;
poor aging performance of natural
rubber;
the price is higher.
acrylic ester: emulsion (water based)【敏感词】
solvent;
features of acrylic acid ester adhesive
film
1), emulsion acrylic (water-based acrylic) :
relatively illiquid, reached the final viscosity time is relatively long, low
protective film viscosity will increase viscosity increases with the increase of
time, environmental protection material, has good weather resistance, can be
quick to tear film;
2) solvent acrylic acid: difficult to meet the
high requirements of environmental standards, other characteristics are similar
to emulsified acrylic acid.
3. classification by base material
pe base material, pvc base material, pet base
material, opp base material【敏感词】others
4. classified according to the protection film
market
1) traditional protective film: such as
galvanized steel plate protective film, color plate protective film, glass plate
or plastic sheet material protective film etc.
this kind of traditional protective film is
mainly applied in low value, which is low for performance【敏感词】crystal point,【敏感词】
is mostly coated with plastic film.
2) protective film of plane display instrument:
the application scope includes flat display, tft-lcd module, backlight module,
glass substrate【敏感词】various optical components such as polarimeter, color
filter, etc.
this kind of protective film has high
requirement for the control of viscosity【敏感词】crystal point, which is the
application of high additive value【敏感词】high technology threshold.
3) protective film used for high tech
electronics, such as dry film【敏感词】wafer grinding process.
this type of protective film usually needs to
be produced in a dustless chamber【敏感词】is extremely strict with the requirements
of the crystals.
only a small number of protective film
manufacturers have sufficient technical capacity to meet these
requirements
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