久草视频免费在线观看_免费毛片视频_国产粉嫩在线_www天天操天天干_天天淫夜夜操_男干男中文字幕视频_18禁网站免费_波多野结衣一区二区三区四区_极品大奶在线草_无码激情国产强奸视频__国产污网站在线看_亚洲不卡网站_亚洲乱码视频久久久_成人黑料视频在线

Material: It is made of imported or domestic stretchy kraft paper, the highest four layers of paper plus a PE film, bonded with food-grade water-borne adhesive.

Advantages: exquisite printing effect, high grade products, multi-layer dislocation perforation, multi-layer dislocation breaking, high sealing performance, especially suitable for ultra-fine powder material packaging.

Material: Sinopec high strength polypropylene (PP) material is used to weave cloth plus polyethylene (PE) material high temperature shower film, and imported extensible kraft paper is added. The inner paper can choose surface polyethylene (PE) material high temperature shower film, and the flat cloth is stitched in sticky.

Advantages: High tear strength of valve bottom, low breakage rate, light treatment can be used, strong and durable in line with multiple transport, double-layer staggered perforation, air permeability and material leakage, moisture-proof performance, especially suitable for food and ultra-fine powder material packaging.

Material: Using imported or domestic extensible kraft paper plus polyethylene (PE) film and food-grade water-borne adhesives into the sticking drum.

Advantages: It is suitable for the traditional sewing sealing method. PE film can be added in the middle of the paper to pack the products which need moisture-proof.