• 全国电话服务热线:400-801-0899

当前位置:首页 > 新闻中心 > 公司动态 >
来源:www.sdynbz.com 发布时间:2022-07-31 浏览次数:122
In gift box packaging, the role of inner lining is very important. It can not only fix products and protect products, but also foil the whole packaging more beautiful. Below, food packaging gift box manufacturers will introduce the differences of three kinds of inner lining materials commonly used by custom manufacturers.
Pearl cotton
EPE (expandable polyethylene) is expandable polyethylene. It is a non crosslinked closed cell structure. It is a high foam polyethylene product extruded with low-density polyethylene (LDPE) as the main raw material. It is composed of countless independent bubbles generated by physical foaming of low-density polyethylene grease.
It overcomes the shortcomings of ordinary styrofoam, such as fragility, deformation and poor recoverability. It has many advantages, such as water-proof and moisture-proof, shockproof, sound insulation, heat preservation, good plasticity, strong toughness, recycling, environmental protection, strong impact resistance and so on. In gift box manufacturers, pearl cotton can be matched with various colored flannels to make the gift box more colorful.
Most of them are synthesized from polyisocyanates and polyols. The basic reaction is the reaction between polyols and polyisocyanates to produce polyurethane. The commonly used spongy science is called polyurethane soft foaming rubber. Polyurethane is a common polymer material in life, which is widely used to make various "sponge" products. Because of its good resilience, sponge is often used in toy gift boxes and electronic product packaging.
It is prepared by copolymerization of ethylene (E) and vinyl acetate (VA), which is called EVA for short. EVA is characterized by good softness, rubber like elasticity, good flexibility at -50 ℃, good transparency and surface gloss, good chemical stability, good anti-aging and ozone resistance, and non-toxic.
The main differences among pearl cotton, sponge and EVA are as follows:
1. It can be distinguished with the naked eye that sponges are very elastic and relatively lighter than the three. EVA is a little hard, usually black, which is the heavier of the three. EPE pearl cotton is generally white and black, which is very different from sponge. The sponge will be restored to its original state no matter how you press it, but EPE pearl cotton has no elasticity. If you press it hard, the place where you press it will be concave.
2. EPE pearl cotton has wavy lines, which looks like a lot of foam sticking together, very light. EVA is solid, and its component concentration is relatively heavy.
High end gift boxes are often customized with three kinds of inner support materials. That's the difference. If you have any questions about them, please come to our website Consult and understand.