EVA films, which stand out for their excellent elasticity, are often produced by extrusion blow molding. The properties of this film are closely related to the content of vinyl acetate (VA). Ke hoʻonui nei kaʻike o nā hihi o nā kiʻi, e hoʻomaikaʻi ke kiʻi i nā huaʻala o ka elasticity, kū i ka paleʻana i keʻano, a me keʻano wela. When the VA content reaches 15%~20%, its performance is even comparable to that of flexible PVC film. Conversely, when the VA content is lower, the film performance is closer to that of LDPE film. Generally, the content of VA in EVA film is controlled in the range of 10%~20%.
EVA films are known for their transparency, softness, and self-adhesiveness to the comfortable feel. Its excellent stress crack resistance and high elasticity make the elongation as high as 59%~80%, making it an ideal spiral wound film. Ma ke kahua o ka paleʻana, ua nui ka hoʻohanaʻana i ka hōʻiliʻili a me ke kāʻeiʻana i nā pahu a me nā ukana a me nā ukana i hoʻopaʻaʻia. I ka manawa like, kūponoʻo Eva Movie i ka hanaʻana i nāʻeke pepa no nā mea kaumaha e like me nā mea kanu a me nā mea kanu manu. In addition, it has excellent low-temperature heat sealing and inclusion sealing, and is often used as a heat sealing layer for composite films.
The production methods of PVA films include solution casting and extrusion blow molding. Ma muli o ke ala kiʻekiʻe o ka paila o ka pva a me kona mau pōpilikia i ka mahana decomposition, he paʻakikī ka nui o ka hoʻohemoʻana i ka wai. In this way, the film needs to be dried and dehydrated after molding to obtain a practical PVA film. In the field of packaging, the industry prefers to use the cast method to produce PVA films.
PVA films can be divided into water-resistant films and water-soluble films. Hanaʻia nā films wai-pale i ka pva me kahi kekelomomeration iʻoi aku ma mua o 1000 a me nā meaʻalaʻala i hanaʻia i ka pva In packaging applications, we mainly use water-resistant PVA films.
Pva Film, e kū ana i waho no kāna mau transparency maikaʻi loa a me ka gloss,ʻaʻole i emi iho i ka hoʻopiliʻana i ka static electricing a me ka lepo. In the dry state, it exhibits excellent airtightness and fragrance retention, as well as excellent oil resistance. In addition, PVA films have good mechanical strength, toughness, and resistance to stress cracking, and can be heat-sealed. However, due to its high moisture permeability and strong water absorption, the dimensional stability needs to be improved. I mea e hoʻoponopono ai i kēia pilikia,ʻo PolyVieylidene Choredide This specially treated PVA film is ideal for food packaging.
Hoʻohana pinepineʻiaʻo Pva Mobile ma ke kauʻana i ka pahu pahu no nā kiʻiʻoniʻoni compowite, a ua nui loa i hoʻohanaʻia i ke kāwiliʻana o ka meaʻai wikiwiki, nā huahana laulā ahi a me nā meaʻai aʻoi aku. At the same time, its single film is also widely used in the packaging of textiles and clothing. Eia kekahi, uaʻoi aku ka momona o nā Pnup-Slub-Slub ma ka moʻaʻana a me ka pena, he palaka, nā mea holoi holoi maʻi, eke ai
Post Time: Mar-18-2025