阅读说明：本技术 一种塑料编织袋内覆用膜的制备方法 (The preparation method with film is covered in a kind of Polywoven Bag ) 是由 张爱军 张峰 陈颜君 于 2019-09-09 设计创作，主要内容包括：本发明提供一种塑料编织袋内覆用膜的制备方法,包括外层和内层两层,制备方法包括如下步骤：S1混料：将外层原料混合后制备成外层原料混合物,内层原料混合后制备成内层混合物；S2调配：将步骤S1中的外层原料混合物和内层原料混合物按照比例调配,并分别储存待生产；S3吹塑成型：将步骤S2调配后的外层原料混合物和内层原料混合物共挤吹塑成型,得到塑料编织袋内覆膜。本发明提供的内覆膜韧性高、环保、与塑料圆织袋粘结紧密。(The present invention provides the preparation method covered in a kind of Polywoven Bag with film, including outer layer and two layers of internal layer, and preparation method includes the following steps: S1 mixing: will outer layer raw material mix after be prepared into outer layer raw mixture, be prepared into internal layer mixture after the mixing of internal layer raw material；S2 allotment: by step S1 outer layer raw mixture and internal layer raw mixture proportionally deploy, and store respectively to be produced；S3 blow molding: outer layer raw mixture and internal layer raw mixture coextrusion blow after step S2 is deployed form, and obtain overlay film in Polywoven Bag.Interior overlay film toughness provided by the invention is high, environmentally friendly, close with the circular woven bag bonding of plastics.)

1. covering the preparation method with film in a kind of Polywoven Bag, including outer layer and two layers of internal layer, which is characterized in that the preparation Method includes the following steps:

S1 mixing: it is prepared into outer layer raw mixture after outer layer raw material is mixed, internal layer mixing is prepared into after the mixing of internal layer raw material Object；

S2 allotment: by step S1 outer layer raw mixture and internal layer raw mixture proportionally deploy, and store respectively It is to be produced；

S3 blow molding: outer layer raw mixture and internal layer raw mixture coextrusion blow after step S2 is deployed form, and obtain Overlay film in Polywoven Bag.

2. covering the preparation method with film in Polywoven Bag according to claim 1, which is characterized in that in step S3, institute The step of stating coextrusion blow molding are as follows:

(1) by the outer layer raw mixture stored respectively and internal layer raw mixture be added coextrusion blow film machine outer layer and In internal layer hopper；

(2) it heats and is gradually warmed up, the extrusion temperature of outer layer and internal layer is controlled at 120~150 DEG C；

(3) extruded plastic foil forms overlay film in Polywoven Bag after water cooling；

(4) winding storage is stand-by.

3. covering the preparation method with film in Polywoven Bag according to claim 1, which is characterized in that in parts by weight Meter, outer layer raw material includes following components and proportion: 70-80 parts of linear low density polyethylene (LLDPE), 3-5 parts of high density polyethylene (HDPE), being stablized 3-5 parts of agent, 5-8 parts of filler master batch.

4. covering the preparation method with film in Polywoven Bag according to claim 1, which is characterized in that in parts by weight Meter, internal layer raw material includes following components and proportion: 70-90 parts of low density polyethylene (LDPE), 5-8 parts of high density polyethylene (HDPE), and natural rubber 3-5 parts of latex, 5-10 parts of additive, 3-5 parts of toughener.

5. covering the preparation method with film in Polywoven Bag according to claim 1, which is characterized in that internal layer in step S2 The weight ratio of raw mixture and outer layer raw mixture is 3~4:6~7.

6. covering the preparation method with film in Polywoven Bag according to claim 3, which is characterized in that in parts by weight Meter, the outer layer raw material further includes 3-5 parts of (methacrylic acid) ester of 1,4-butanediol two.

7. covering the preparation method with film in Polywoven Bag according to claim 3, which is characterized in that the stabilizer is Glycidoxy dimethyl silicone polymer.

8. covering the preparation method with film in Polywoven Bag according to claim 3, which is characterized in that the filler master batch For silicates miberal powder, the silicate miberal powder is montmorillonite, talcum, any one in kaolin.

9. covering the preparation method with film in Polywoven Bag according to claim 4, which is characterized in that the toughener is Cyclic vinyl polymethoxy silane.

Technical field

The present invention relates to Polywoven Bag technical field of producing, in particular to cover in a kind of Polywoven Bag with film Preparation method.

Background technique

Interior coated knitted bag is widely used in the industries such as chemical industry, agricultural, food, cement, it had both accepted woven bag tension The high advantage of intensity, and there is the good air-tightness of bag film and moisture resistance, it is a kind of typical compound package material.Especially Using cylinder weaving cloth as interior coated knitted bag made of base fabric, even more with anti-pull-off force is strong, air-tightness is good, moisture-proof, overlay film Air pressure ability is strong, there is no outer laminating adhesive woven bag original scollop, scallops to exist for appearance in not easily to fall off, receiving, intensity is not impaired etc. excellent Point, and fundamentally solve the original process for manually turning over bag in the past.

But being easily stripped between interior overlay film and circular woven woven bag in existing Polywoven Bag, the toughness of interior laminating adhesive can not Reach the increasing market demand.Therefore it needs to produce a kind of high toughness, environmental protection, bond in closely and cover with the circular woven bag of plastics Film.

Summary of the invention

High, environmental protection that the purpose of the present invention is to provide a kind of toughness bonds overlay film in closely with the circular woven bag of plastics.

Above-mentioned technical purpose of the invention, which has the technical scheme that in a kind of Polywoven Bag, covers use The preparation method of film, including outer layer and two layers of internal layer, the preparation method includes the following steps:

S1 mixing: it is prepared into outer layer raw mixture after outer layer raw material is mixed, is prepared into internal layer after the mixing of internal layer raw material Mixture；

S2 allotment: by step S1 outer layer raw mixture and internal layer raw mixture proportionally deploy, and respectively It stores to be produced；

S3 blow molding: by step S2 allotment after outer layer raw mixture and internal layer raw mixture coextrusion blow at Type obtains overlay film in Polywoven Bag.

As the further setting of the present invention, in step S3, the step of coextrusion blow forms are as follows:

(1) the outer of coextrusion blow film machine is added in the outer layer raw mixture stored respectively and internal layer raw mixture In layer and internal layer hopper；

(2) it heats and is gradually warmed up, the extrusion temperature of outer layer and internal layer is controlled at 120~150 DEG C；

(3) extruded plastic foil forms overlay film in Polywoven Bag after water cooling；

(4) winding storage is stand-by.

As the further setting of the present invention, according to parts by weight, outer layer raw material includes following components and proportion: line style is low 70-80 parts of density polyethylene, 3-5 parts of high density polyethylene (HDPE), 3-5 parts of stabilizer, 5-8 parts of filler master batch.

As the further setting of the present invention, according to parts by weight, internal layer raw material includes following components and proportion: low-density 70-90 parts of polyethylene, 5-8 parts of high density polyethylene (HDPE), 3-5 parts of natural rubber latex, 5-10 parts of additive, 3-5 parts of toughener.

As the further setting of the present invention, the weight ratio of internal layer raw mixture and outer layer raw mixture in step S2 For 3~4:6~7.

As the further setting of the present invention, according to parts by weight, the outer layer raw material further includes two (first of 1,4-butanediol Base acrylic acid) 3-5 parts of ester.

As the further setting of the present invention, stabilizer is glycidoxy dimethyl silicone polymer.

As the further setting of the present invention, filler master batch is silicates miberal powder, the silicate miberal powder be montmorillonite, Any one in talcum, kaolin.

As the further setting of the present invention, toughener is cyclic vinyl polymethoxy silane.

The beneficial effects of the present invention are:

1. the present invention uses (methacrylic acid) ester of 1,4-butanediol two as gluing activating agent, when overlay film in outer layer and glue When glutinous agent contact, (methacrylic acid) ester of 1,4-butanediol two and adhesive in interior overlay film interact, so that Isosorbide-5-Nitrae-fourth two Alcohol two (methacrylic acid) ester migrates outward, increases the cohesive force between adhesive, improves adhesive and interior overlay film outer layer Binding force, improve in overlay film peel strength, reduce in overlay film removing Polywoven Bag probability, extend plastics it is bag weaved Service life.

2. the present invention is sufficiently divided in low density polyethylene (LDPE) and high density polyethylene (HDPE) using cyclic vinyl polymethoxy silane It dissipates, cyclic vinyl polymethoxy silane concentrates central source as stress when by external force, leads to the generation of crazing, changes material Fracture mode, ductile rupture is become from brittle fracture, improves the toughness of interior overlay film internal layer, and cyclic vinyl polymethoxy The addition of silane changes material fracture mode, when film is squeezed, generation can with restorable flexible deformation, without It is irreclaimable plastic deformation, improves the ability that material resists external force deformation, reduce film article surface ruffle quantity.

3. the present invention participates in blending as stabilizer using glycidoxy dimethyl silicone polymer, sub-polyethylene is improved Subchain length and degree of branching, improve the degree of being entangled with of strand, and then improve the melt strength of material, can make For film uniform and stable out, the stability and mechanical performance of interior overlay film are improved.

Specific embodiment

Technical solution of the present invention is clearly and completely described below in conjunction with specific embodiment.Obviously, described Embodiment be only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiment of the present invention, ability Domain those of ordinary skill every other embodiment obtained without creative efforts, belongs to guarantor of the present invention The range of shield.