CN104166198A - Manufacturing method of high-strength foaming filler rope - Google Patents

Abstract

The invention discloses a manufacturing method of a high-strength foaming filler rope. The method includes the following steps: 30 parts of a low-density polyethylene, the melt index of which is 0.03-0.09g/10min, 30 parts of a high-density polyethylene (A), the melt index of which is 1.8-3.2g/10min, 40 parts of a high-density polyethylene (B), the melt index of which is 5-9g/10min, and 15 parts of superfine calcium carbonate are placed in a highly-mixing machine for even mixing so that a mixture is formed; and a filler rope particle material is heated and fused in an extruder and nitrogen is injected into the extruder under a specific pressure at the same time and then gas release is carried out through pressure reduction so that even foams which are closely combined with an inner layer are generated and a polyethylene foaming filler rope burial layer with a foaming capacity of 10-80% is formed. The manufacturing method of the high-strength foaming filler rope reduces adverse effects of use of a plurality of kinds of addition agents on final performance of plastic and a foaming filler rope which is manufactured through the particles is used as a burial layer which can be closely combined with a plastic thin-film external cladding layer and thus tensile strength and lateral-pressure resistance strength of the filler rope are improved.

Description

The manufacturing process of high strength foaming packing gasket

Technical field

The present invention relates to foaming packing gasket, relate in particular to a kind of manufacturing process of high strength foaming packing gasket.

Background technology

Existing optical cable is the solid cord that high density Insulation Material is extruded with gasket for packing majority, because hardness is high, the extruding force being subject in machine when being stranding into cable core altogether with other element is larger, limited high-speed production, and it is other elements such as loose sleeve pipe of extruding fiber unit easily, make cable core distortion, affect the roundness of optical cable.Secondly, solid cord raw material consumption is large, and manufacturing cost is high, and himself weight is large, causes optical cable transportation cost higher.In addition solid cord hardness is large, and external force resistance resiliency is poor, and protection effect is not good enough.

Deficiency for optical cable hatching solid rope; foaming filling rope for optical cables arises at the historic moment; its because raw materials cost is low, protect the advantage such as effective, lightweight extensively concerned; but relative less with the report of market application about its manufacture method at present; and such gasket for packing is very few especially by the data of particulate material, and exist problems.As CN101382626A discloses the patent of invention of a kind of " optical cable foaming packing gasket granule material and production method thereof ", in this patented technology, the raw material of packing gasket granule material has Low Density Polyethylene, high density polyethylene, polypropylene, Tissuemat E, stearic acid, calcium stearate and four pentaerythritol resins etc., its component is more, proportional difference is larger, take trouble, be difficult for disperseing more difficult mixing; And because each component unit price is all comparatively expensive, manufacturing cost still quite has pressure; In addition, the interpolation of multiple auxiliary agent is used easily the final performance of product is produced to harmful effect, causes goods air entrapment skewness, and can in reproduced goods, leave little molecule residue, affects the mechanical property of goods.

Summary of the invention

The manufacturing process that the object of this invention is to provide a kind of high strength foaming packing gasket, it takes conveniently, saves manpower; Each component ratio is comparatively close, is easy to be uniformly dispersed; In raw material, only contain polyvinyl resin, calcium carbonate and nucleation masterbatch, the harmful effect of the use that has reduced multiclass auxiliary agent to the final performance of plastics; The interpolation of certain proportion calcium carbonate effectively reduces the cost of material; By the prepared foaming packing gasket body of this particle as buried layer, can combine closely with plastic sheeting surrounding layer, thereby make the degree of drying of gasket for packing and the filling degree of air more constant, increase tension, the lateral pressure resistant intensity of gasket for packing, be more of value to its protective effect to light wave guide;

For achieving the above object, the technical solution used in the present invention is: a kind of manufacturing process of high strength foaming packing gasket, and described high strength foaming packing gasket is obtained through physical blowing by the component of following weight portion:

60 parts of foamed material semi-manufacture,

40 parts of high density polyethylenes (first),

1 part of nucleation masterbatch;

Described foamed material semi-manufacture are comprised of the component of following weight portion:

Melting index is 30 parts of 0.03 ~ 0.09 Low Density Polyethylenes,

Melting index is 30 parts of 1.8 ~ 3.2 high density polyethylenes (first),

Melting index is 40 parts of 5 ~ 9 high density polyethylenes (second),

15 parts, micron-class superfine calcium carbonate;

Described foamed material semi-manufacture melt flow rate is 0.65 ± 0.20g/10min;

Comprise the following steps:

Step 1,15 parts of melting index is 30 parts of the Low Density Polyethylenes of 0.03 ~ 0.09 g/10min, 30 parts of high density polyethylenes (first) that melting index is 1.8 ~ 3.2 g/10min, melting index is 5 ~ 9 g/10min 40 parts of high density polyethylenes (second), calcium carbonate superfine powders are positioned over to high-speed mixer and mixing evenly form potpourri;

Step 2, the described potpourri of step 1 is sent in double screw extrusion machine, 180 ~ 230 ℃ of extruder barrel temperature, multistagely from low to high heated, to be extruded into Ф 2.5mm under 230 ℃ of conditions of head temperature rectangular;

Step 3, step 2 described rectangular dried through blower fan after water cooling tank is cooling again, then, be cut into long 3mm, Ф 2.5mm small column grain as foamed material semi-manufacture;

Step 4, by 1 part of 40 parts of 60 parts of foamed material semi-manufacture described in step 3, high density polyethylene (first) and nucleation masterbatch, by high mixer, three is mixed to the particulate material that obtains described foaming packing gasket;

Step 5, described packing gasket granule material in extruder through heating and melting, nitrogen is injected wherein under certain pressure simultaneously, through decompression, discharge gas again, thereby generate the uniform bubble of combining closely with internal layer, the polyethylene foam gasket for packing body buried layer that formation frothing percentage is 10～80%;

Step 6, described polyethylene foam gasket for packing body buried layer are at the temperature of setting after high speed extrusion, and its skin, after PBT resin-coating, forms the polyethylene foam gasket for packing that buried layer and clad are combined closely.

Due to the utilization of technique scheme, the present invention compared with prior art has following advantages:

1. the manufacturing process of high strength foaming packing gasket of the present invention, its gasket for packing hardness is moderate, expansion coefficient is little, in stranding process, be difficult for making other deformed element around, guarantee cable core roundness, and because foaming packing gasket is softer, be that other element is stranding into the extruding force being subject at device interior when cable core is extruded altogether less, can high-speed production; Secondly, because foaming packing gasket density is little, light specific gravity, make the weight of unit length optical cable finished product, can reduce the transportation cost of optical cable; Again, foaming packing gasket material consumption is few, can reduce manufacturing cost, calcium carbonate unit price is relatively low, effectively reduced cost (although the use of calcium carbonate has increased the weight of gasket for packing self to a certain extent, but because gasket for packing in this patent is foaming packing gasket, therefore compare entity rope, in weight, still have greater advantage); Component kind is relatively less, and its unit price is on the low side compared to each analog assistant, thereby whole manufacturing cost has greater advantage; Each proportion of composing difference is less, is convenient to take, and saves artificial.

2. the manufacturing process of high strength foaming packing gasket of the present invention, its gasket for packing component ratio proportion difference is less, is convenient to take, and manual operation error is less, is beneficial to the stability that guarantees product quality during batch production; Secondly, not containing each analog assistant, the use of each analog assistant easily produces harmful effect to the final performance of product, causes goods air entrapment skewness, and can in goods, leave little molecule residue, affects Mechanical Properties of Products.

Embodiment

Below in conjunction with embodiment, the invention will be further described:

Embodiment: a kind of manufacturing process of high strength foaming packing gasket, described high strength foaming packing gasket is obtained through physical blowing by the component of following weight portion:

60 parts of foamed material semi-manufacture,

40 parts of high density polyethylenes (first),

1 part of nucleation masterbatch;

Described foamed material semi-manufacture are comprised of the component of following weight portion:

Melting index is 30 parts of 0.03 ~ 0.09 Low Density Polyethylenes,

Melting index is 30 parts of 1.8 ~ 3.2 high density polyethylenes (first),

Melting index is 40 parts of 5 ~ 9 high density polyethylenes (second),

15 parts, micron-class superfine calcium carbonate;

Above-mentioned foamed material semi-manufacture melt flow rate is 0.65 ± 0.20g/10min.

Comprise the following steps:

Step 1,15 parts of melting index is 30 parts of the Low Density Polyethylenes of 0.03 ~ 0.09 g/10min, 30 parts of high density polyethylenes (first) that melting index is 1.8 ~ 3.2 g/10min, melting index is 5 ~ 9 g/10min 40 parts of high density polyethylenes (second), calcium carbonate superfine powders are positioned over to high-speed mixer and mixing evenly form potpourri;

Step 2, the described potpourri of step 1 is sent in double screw extrusion machine, 180 ~ 230 ℃ of extruder barrel temperature, multistagely from low to high heated, to be extruded into Ф 2.5mm under 230 ℃ of conditions of head temperature rectangular;

Step 3, step 2 described rectangular dried through blower fan after water cooling tank is cooling again, then, be cut into long 3mm, Ф 2.5mm small column grain as foamed material semi-manufacture;

Step 4, by 1 part of 40 parts of 60 parts of foamed material semi-manufacture described in step 3, high density polyethylene (first) and nucleation masterbatch, by high mixer, three is mixed to the particulate material that obtains described foaming packing gasket;

Step 5, described packing gasket granule material in extruder through heating and melting, nitrogen is injected wherein under certain pressure simultaneously, through decompression, discharge gas again, thereby generate the uniform bubble of combining closely with internal layer, the polyethylene foam gasket for packing body buried layer that formation frothing percentage is 10～80%;

Step 6, described polyethylene foam gasket for packing body buried layer are at the temperature of setting after high speed extrusion, and its skin, after PBT resin-coating, forms the polyethylene foam gasket for packing that buried layer and clad are combined closely.

Above-described embodiment is only explanation technical conceive of the present invention and feature, and its object is to allow person skilled in the art can understand content of the present invention and implement according to this, can not limit the scope of the invention with this.All equivalences that Spirit Essence is done according to the present invention change or modify, within all should being encompassed in protection scope of the present invention.

Claims (1)

1. a manufacturing process for high strength foaming packing gasket, is characterized in that: described high strength foaming packing gasket is obtained through physical blowing by the component of following weight portion:

60 parts of foamed material semi-manufacture,

40 parts of high density polyethylenes (first),

1 part of nucleation masterbatch;

Described foamed material semi-manufacture are comprised of the component of following weight portion:

Melting index is 30 parts of 0.03 ~ 0.09 Low Density Polyethylenes,

Melting index is 30 parts of 1.8 ~ 3.2 high density polyethylenes (first),

Melting index is 40 parts of 5 ~ 9 high density polyethylenes (second),

15 parts, micron-class superfine calcium carbonate;

Described foamed material semi-manufacture melt flow rate is 0.65 ± 0.20g/10min;

Comprise the following steps:

Step 1,15 parts of melting index is 30 parts of the Low Density Polyethylenes of 0.03 ~ 0.09 g/10min, 30 parts of high density polyethylenes (first) that melting index is 1.8 ~ 3.2 g/10min, melting index is 5 ~ 9 g/10min 40 parts of high density polyethylenes (second), calcium carbonate superfine powders are positioned over to high-speed mixer and mixing evenly form potpourri;

Step 2, the described potpourri of step 1 is sent in double screw extrusion machine, 180 ~ 230 ℃ of extruder barrel temperature, multistagely from low to high heated, to be extruded into Ф 2.5mm under 230 ℃ of conditions of head temperature rectangular;

Step 3, step 2 described rectangular dried through blower fan after water cooling tank is cooling again, then, be cut into long 3mm, Ф 2.5mm small column grain as foamed material semi-manufacture;

Step 4, by 1 part of 40 parts of 60 parts of foamed material semi-manufacture described in step 3, high density polyethylene (first) and nucleation masterbatch, by high mixer, three is mixed to the particulate material that obtains described foaming packing gasket;

Step 5, described packing gasket granule material in extruder through heating and melting, nitrogen is injected wherein under certain pressure simultaneously, through decompression, discharge gas again, thereby generate the uniform bubble of combining closely with internal layer, the polyethylene foam gasket for packing body buried layer that formation frothing percentage is 10～80%;

Step 6, described polyethylene foam gasket for packing body buried layer are at the temperature of setting after high speed extrusion, and its skin, after PBT resin-coating, forms the polyethylene foam gasket for packing that buried layer and clad are combined closely.