少妇无码av无码专区线,诱人的奶头BD在线观看,人与物VIDEOS另类XXXX,人妻斩り56歳无码

濟(jì)南精美塑料包裝廠為您提供塑料袋、方便袋、塑料袋、食品塑料袋,相關(guān)信息發(fā)布和資訊展示,敬請(qǐng)關(guān)注!

濟(jì)南歷下精美塑料包裝廠

服務(wù)熱線: 18764138233

熱門(mén):
行業(yè)動(dòng)態(tài)

塑料袋復(fù)合材料的基本結(jié)構(gòu)有哪些?

來(lái)源:http://ssxx10.com/ 日期:2023-12-28

一般來(lái)說(shuō),復(fù)合包裝材料的外層材料應(yīng)當(dāng)是熔點(diǎn)較高,耐熱性能好,不易劃傷、磨毛,印刷性能好,光學(xué)性能好的材料,常采用的有紙、鋁箔、玻璃紙、聚碳酸酯、尼龍、聚酯、聚丙烯等。

Generally speaking, the outer layer material of composite packaging materials should be a material with high melting point, good heat resistance, not easy to scratch or grind, good printing performance, and good optical performance. Commonly used materials include paper, aluminum foil, fiberglass, polycarbonate, nylon, polyester, polypropylene, etc.

內(nèi)層材料應(yīng)當(dāng)具有熱封性、粘合性好、無(wú)味、、耐油、耐水、耐化學(xué)品等性能,如聚丙烯、聚乙烯、聚偏二氯乙烯等耐熱塑料材料。

The inner layer material should have properties such as heat sealing, good adhesion, odorless, non-toxic, oil resistant, water resistant, and chemical resistant, such as heat-resistant plastic materials such as polypropylene, polyethylene, and polyvinylidene chloride.

20230630034312402.jpg

三層以上復(fù)合材料的中層通常采用阻隔氣體與水分及遮敝光線等性能好且機(jī)械強(qiáng)度高的材料,如鋁箔、聚偏二氯乙烯、玻璃紙、紙、聚乙烯等。

The middle layer of composite materials with three or more layers usually uses materials with good performance and high mechanical strength, such as aluminum foil, polyvinylidene chloride, glass paper, paper, polyethylene, etc., to block gas and moisture, and to block light.

層與層之間則涂有粘合劑用于粘合。一般外層與中層材料之間使用溶劑型熱固性聚氨酯粘合劑,內(nèi)層與中層之間使用改性聚丙烯乳液粘合劑或用特殊改性的含羰基丙烯共同樹(shù)脂等。外層用粘合劑要求粘合強(qiáng)度高、工藝簡(jiǎn)單、成本低;內(nèi)層用粘合劑要求耐高溫、剝離強(qiáng)度高、、無(wú)味,不影響食品的營(yíng)養(yǎng)成分,能很好保持食品的色香味。

Adhesive is applied between layers for bonding. Generally, solvent based thermosetting polyurethane adhesive is used between the outer layer and the middle layer, and modified polypropylene lotion adhesive or specially modified carbonyl propylene containing common resin is used between the inner layer and the middle layer. The adhesive used for the outer layer requires high bonding strength, simple process, and low cost; The adhesive used for the inner layer requires high temperature resistance, high peel strength, non-toxic, odorless, and does not affect the nutritional content of the food, which can effectively maintain the color, aroma, and taste of the food.

女人被狂C躁到高潮视频免费网站| 极品尤物一区二区三区| 浴室高潮BD在线观看| 国产婷婷色一区二区三区| 亚洲AV无码久久精品狠狠爱浪潮| 凹凸精品熟女在线观看| 成人免费无遮挡无码黄漫视频| 曰韩无码二三区中文字幕 | 大肉蒂被嘬的好爽H| 精品人妻AV一区二区三区| 国产又色又爽又高潮免费视频麻豆 | 两个奶被男人揉了一个晚上| 老师含紧一点H边做边走视频 | 麻花豆传媒MV在线观看网站| 中文字幕人妻色偷偷久久| 国产精品久久久久一区二区三区共| 粗大的内捧猛烈进出| 国产精品刮毛| 双性玩弄调教NP产乳孕交灌尿| 日本xxxx| 野外真人实战CS| 精品人妻无码一区二区三区性| 凹凸精品熟女在线观看 | 少妇养生馆spa私密精油按摩| 成人性生交A片免费看网站| 九色少妇丨PORNY丨自拍| 亚洲AV无码国产精品久久不卡| 日韩精品毛片无码一区到三区| 欧美黑人又大又粗XXXXX| 青青青国产精品一区二区| 夜鲁鲁鲁夜夜综合视频欧美| 精品久久久久久亚洲精品 | 欧美老妇大p毛茸茸| 精品国产三级a∨在线| 99久久精品日本一区二区免费| 成人片色情免费观看网站| 小12箩利洗澡无码视频网站| 日本亚洲色大成网站WWW久久| 无码中文日本精品一区| 日本成熟人妻理伦无码新片| 最美情侣在线播放观看视频免费|